(19) |
|
|
(11) |
EP 0 851 959 B1 |
(12) |
EUROPEAN PATENT SPECIFICATION |
(45) |
Mention of the grant of the patent: |
|
17.04.2002 Bulletin 2002/16 |
(22) |
Date of filing: 20.09.1996 |
|
(86) |
International application number: |
|
PCT/NO9600/223 |
(87) |
International publication number: |
|
WO 9711/242 (27.03.1997 Gazette 1997/14) |
|
(54) |
UNDERFRAME FOR USE WHEN BUILDING A TEMPORARY WORK BENCH OR WORK TABLE AT A BUILDING
SITE
STÜTZRAHMEN FÜR DEN GEBRAUCH BEIM BAU EINER PROVISORISCHEN WERKBANK ODER EINES ARBEITSTISCHES
AUF DER BAUSTELLE
BATI POUR UN BANC DE TRAVAIL OU UN ETABLI TEMPORAIRES, MONTES SUR UN CHANTIER
|
(84) |
Designated Contracting States: |
|
AT BE CH DE DK ES FI FR GB IT LI NL SE |
(30) |
Priority: |
20.09.1995 NO 953701
|
(43) |
Date of publication of application: |
|
08.07.1998 Bulletin 1998/28 |
(73) |
Proprietor: Kaasinen, Gunnar |
|
4060 Kleppe (NO) |
|
(72) |
Inventor: |
|
- Kaasinen, Gunnar
4060 Kleppe (NO)
|
(74) |
Representative: Münch, Otto, Dipl.-Ing. et al |
|
Isler & Pedrazzini AG,
Patentanwälte,
Postfach 6940 8023 Zürich 8023 Zürich (CH) |
(56) |
References cited: :
DE-A- 4 212 158 US-A- 4 249 636
|
NO-C- 90 034
|
|
|
|
|
|
|
|
|
Note: Within nine months from the publication of the mention of the grant of the European
patent, any person may give notice to the European Patent Office of opposition to
the European patent
granted. Notice of opposition shall be filed in a written reasoned statement. It shall
not be deemed to
have been filed until the opposition fee has been paid. (Art. 99(1) European Patent
Convention).
|
[0001] This invention relates to a work bench underframe, particularly for a temporary work
bench or work table, wherein the underframe is adapted to be releasably interconnected
to a table top which, preferably, is constituted by a standard pallet. Possibly, the
underframe may be equipped with travelling wheels.
[0002] At most building sites and plants, nearly at all times, a need for temporary work
benches or work tables exists, these benches and/or tables being discharged and broken
up when the building works are finished. Often, standard pallets are left at the building
site after use, and they are well suited as solid and dependable table tops. The pallet
is nailed to an underframe consisting of legs and braces in the form of cut wooden
materials. However, the result is often a quite unstable temporary work table, as
could have been expected. Such a building method of providing a temporary work table
is time-consuming, because the necessary working operations must be repeated in their
entirety each and every time a need arises for a work table, and because it usually
takes some time to find wooden materials fit for use when building an underframe.
[0003] NO 90034, considered herein as closest prior art reference, discloses an underframe
to be used when building a table, the underframe being adapted to be hooked on a board.
The underframe comprises two identical underframe parts, each consisting of an elastically
compliant, w-shaped body, having freely projecting legs taking upright positions in
the table's position of use. Each leg is carrying a hook-like holding means for engagement
with the board. The two underframe parts are connected with each other by a spring,
this spring keeping the underframe parts tight to the board.
[0004] US-A-4'249'636 discloses a portable and collapsible underframe to support a board,
the underframe comprising three u-shaped leg structures. A first and a second of these
structures are pivotally fixed to the board, the third being pivotally fixed to the
first one. The table is standing on end parts of the first and third structure, the
second one being pivotally connected to the first one. Furthermore, the first and
second structure are connected by a safety and bracing device.
[0005] Therefore, an object of the present invention is to provide a prefabricated underframe
shaped and designed for releasable interconnection to a table top forming member,
preferably a standard pallet.
[0006] According to the invention, this object is realized by the fact that an underframe
of the kind defined introductorily, is shaped and designed such that it exhibits the
features appearing from the characterizing clause of claim 1.
[0007] A further object of the invention is aiming at providing an underframe of the kind
concerned, capable of taking a storage/transport position, wherein each of two or
more identical underframe parts substantially becomes situated in "one plane", without
portions projecting appreciably therefrom.
[0008] In a general embodiment, the underframe according to the invention comprises at least
two substantially identical underframe parts, each including a hoop-like member having
a certain self-elasticity within the hoop plane, said hoop-like member having two
free, in the position of use upright legs forming the legs of the table underframe,
the hoop web forming the foot piece of the table underframe, the upright, freely projecting
legs each being provided with a holding means, e.g. having an elastic clamping effect,
for releasably retaining the table top which, preferably, is constituted by a pallet.
[0009] In order to adapt the underframe of the invention to pallets of various widths (internal
measure e.g. of "Europallet" is 600 mm and of Lastepallet Sweden 850 mm), at least
one articulated arm thereof may be lengthenable/shortenable, the U-hoop web being
divided and made lengthenable/shortenable. These lengthenable/shortenable parts may
have linear rows of holes adapted to be brought to correspond mutually, bolts serving
to lock the connection between cooperating parts in adjusted position, the lengthening
or shortening, respectively, of said articulated arm(s), of course, being identical
to the lengthening/shortening of the U-hoop web.
[0010] Each of said holding means, which can have an individual, resilient clamping effect
may, preferably, have the shape of an U-shaped holder. When a prefabricated work table
underframe, the four legs thereof carrying such a U-shaped, possibly resilient holding
or clamping means, is to be used in connection with a pallet adapted to form the work
table top, the apertures of the two U-shaped holding means face in opposite directions
at opposing underframe parts, gripping around the lowest but one, longitudinal, opposing
members of the pallet. By "pallet members" is meant the various boards of wood from
which the pallet is nailed together. In order to bring the holding means of each underframe
part into engagement with said longitudinal pallet members, the spacing between the
outer points of the holding means (as measured in the lateral direction of the pallet)
must be brought to be less than the spacing between the opposing side edges of said
longitudinal pallet members.
[0011] The resilience of the resilient hoop-like underframe parts, i.e. the resilience of
their legs, towards and away from each other, could, in connection with a relatively
rigid hoop, established and maintained the surrounding grip of the holding means around
said pallet members, but it is more practical to equip each underframe part with a
shortenable/ lengthenable safety device, urging and keeping the holding means in a
releasable engagement with the pallet's longitudinal, opposing members.
[0012] Such a safety device can be shaped and designed in a constructively simple way. E.g.,
it may be built up as a toggle joint mechanism consisting of two articulated arms,
each of which, at the outer end thereof, being articulated to the adjacent leg of
the respective underframe, and wherein one articulated arm, at the other outer end
thereof, is articulated to the other articulated arm at a point spaced from the end
of the latter. The other articulated arm is provided with a locking means, e.g. in
the form of a bolt, adapted to cooperate with a hole in the first-mentioned articulated
arm when the articulated arms take their securing positions, extending in aligned
orientations, in the extension of each other. In this position, the safety device
urges the two legs of the respective underframe part outwardly away from each other,
in order to secure the retaining grip of the U-shaped holding means thereof around
said opposing pallet members.
[0013] When the locking means of the safety device are brought out of function, e.g. by
pulling a locking pin on one articulated arm out from a locking hole in the other
articulated arm, the holding means may be drawn out of its engagement with an adjacent,
longitudinal pallet member by causing the hoop-like underframe part's legs to resile
towards each other. Thus, the work table is disassembled and, thereafter, it is left
behind a prefabricated underframe having small space demands, favouring transport
and storage thereof.
[0014] In order to achieve a particularly stable connection between the underframe's holding
means and the work table top (the pallet), the holding means may be shaped, designed
and dimensioned with a certain extent laterally of the legs of the underframe parts,
i.e. in the longitudinal direction of the opposing pallet members.
[0015] In order to reduce the space-demand of each underframe, especially with a view on
said holding means, the holding means may be rotatable, at least 90°, about the longitudinal
axis of the leg associated thereto.
[0016] In a practical embodiment of the invention, each hoop leg may carry an external telescopic
pipe each carrying a holding means. Besides enabling the rotation of the holding means
about the longitudinal axis of the leg associated thereto, a simple adjusting device
is obtained for the vertical adjustment of the position of the underframe and, thus,
of the work bench or work table. The outer sleeve of the telescopic pipe may, then,
be formed with a row of adjusting holes, while the leg has one hole only.
[0017] When said holes correspond at an established adjustment vertically, the connection
between the hoop leg and the telescopically displaceable outer sleeve is secured by
means of a locking pin.
[0018] If one, in the lack of a pallet or for some other reason, must use a plate of one
kind or another, the holding means of each underframe part are rotated through the
associated telescopically displaceable and rotatable outer sleeve such that the U-apertures
thereof will be facing each other. This simplifies the mounting of the plate which,
quite simply, can be pushed into the opposing holders formed by the U-shaped holding
means of the underframe parts.
[0019] A non-restricting example of a preferred embodiment is further explained in the following,
reference being made to the attached drawings, wherein:
Figure 1 is a side elevational view of one of at least two hoop-like parts including
in the underframe according to the invention and shown in a mounting position wherein
the underframe is in the course of being interconnected to an elongated, rectangular
pallet shown from a short side thereof, in a vertical sectional view. This side elevational
view, partly in section, also showing a securing and bracing mechanism in an inactive
position, could, however, just as well shown an underframe part in the course of being
disassembled from the pallet, the holding means in both cases being shown in posistions
withdrawn from their engagement with the adjacent, longitudinal pallet member, said
pallet members being mutually opposed in accordance with figure 1;
Figure 2 shows a side elevational view, partly in vertical section, and corresponding
to figure 1, but where each of the holding means are brought into engagement with
the adjacent, longitudinal pallet member, said engagement being maintained by means
of said securing and bracing mechanism which, thus, takes the active securing position
thereof;
Figure 3 shows a vertical section along the line III - III in figure 2, i.e. with
the pallet of figures 1 and 2 seen from one longitudinal side thereof;
Figure 4 corresponds to figure 2, but shows the holding means rotated 90°, simultaneously
as the outer telescopic pipe is caused to take the lower end position thereof, thereby
causing the underframe part shown to take its minimum space-demanding storage and
transport condition;
Figure 5 corresponds to figure 2, but shows a modification of a work table built up
on an underframe according to the invention, identical to the one shown in the preceding
figures, but where the work table top here consists of a solid plate instead of the
previously used pallet;
Figure 6 corresponds to figure 4, but shows an adjustable embodiment of the underframe
adapted to be adjusted according to the pallet width.
[0020] Thus, figures 1 - 3 show the underframe according to the invention in use in association
with a standard pallet, figure 4 showing an underframe part occupying a minimum space-demanding
condition, while figure 5 shows the same underframe in use in association with some
kind of plate instead of the pallet in figures 1 - 3.
[0021] First, reference is made to figures 1 - 3, in which the underframe of the invention,
figure 3, is shown to comprise two identical parts 10a and 10b. As will be appreciated,
especially long work benches or work tables may require support by means of more than
two underframe parts. As the underframe parts 10a and 10b are identical, it is sufficient
to describe one part, namely the one denoted by the reference indication 10b and appearing
from all figures of the drawings.
[0022] The respective underframe part 10b, figures 1 and 2, comprises a substantially modified
U-hoop-like, resilient body 12 having upright, freely terminating legs 14, 14' which,
preferably due to the self-resilience of the hoop-body 12 in the hoop plane, can be
adapted to take the diverging, inoperative position of readiness shown in figure 1,
in which the free ends are spaced at a minimum distance from each other. Instead,
these diverging positions of the legs 14 and 14' could have been established through
manually urging the leg ends inwardly towards each other, utilizing the resilience
of the hoop body 12 in the hoop plane. In order to allow the legs 14, 14' to take
this preparing mounting position, a securing and bracing mechanism generally denoted
by the reference numeral 16, must be brought into an inoperative position. This mechanism
16 is described later on.
[0023] On the outside of each leg 14, 14' and each underframe part 10a, 10b, an outer sleeve
18, 18' is telescopically displaceably disposed, each outer sleeve 18, 18' at the
top carrying a U-shaped holding means 20, 20' which, possibly, may be consituted by
a resilient clamp means.
[0024] The free end of each leg 14, 14' is indicated at 14a, 14a'.
[0025] For the adjusting possibility of the outer telescopic sleeve 18, 18' in the longitudinal
direction of the respective leg 14, 14', the former is provided with a row of holes
22 which, in the position of use, can be brought to correspond with one of a row of
holes 23 in each leg 14, 14', the connection being secured in the adjusted position
by means of a lateral bolt 24. Each of the legs 14, 14' has a further, through-going
hole 26, the axis thereof forming an angle of 90° with the axis of each of the holes
23. One of the holes 22 in each telescopic sleeve 18, 18' is caused to correspond
to this extra hole 26 in the storage og transport position of the underframe part
10a, 10b, figure 4.
[0026] A short pipe piece 28, 28' on the outside of each telescopic sleeve 18, 18' is axially
displaceable, but not rotatable, in relation to the latter, as well as carries a pair
of bearing ears 30, 30' each for the articulated connection of one of two articulated
arms 32, 32' included in the safety and bracing mechanism 16. Each of the two short
pipe pieces 28, 28' has two through-going holes 34 and 36, the axes thereof crossing
each other 90° angularly as well as cooperating with the locking bolt 24 in the position
of use (Figures 1 through 3 and 5) and in the position of storage/transport (Figure
4), respectively.
[0027] The tubular web 14" of the underframe part 10b is provided with vertical bores for
screws 38, 38' or the like, serving as foot pieces. Possibly, the hoop web 14" may
be provided with travelling wheels (not shown).
[0028] The two interhinged articulated arms 32, 32' of the safety and bracing mechanism
16 are such coupled to each other that one outer end of one articulated arm 32 is
articulated to the other articulated arm 32' intermediate the outer ends of the latter,
the articulation point being denoted at 40. The other articulated arm's 32' free end
carries a coupling means in the form of a locking pin 42 or the like, for engaging
into a locking hole 44 or the like provided in the first-mentioned articulated arm
32, situated intermediate the outer ends thereof.
[0029] When the oppositely facing holding means 20, 20' occupy the positions shown in figure
1, with the U-openings directed such that one U-branch of the holding means 20, 20'
is situated above and another U-branch beneath opposing pallet members 46, 46', and
the safety and bracing mechanism 16 is made operative by aligning the two articulated
arms, the U-shaped holding means 20, 20' are urged in directions away from each other,
so that they are caused to grip retainingly around said pallet members 46, 46', see
figure 2. This interconnection of the pallet and the two underframe parts, easy to
disassemble, is then established. Beforehand, one has adjusted the efficient level
of the legs. Then, this efficient level is represented by the telescopic sleeves 18,
18', because they are carrying the holding means 20, 20'.
[0030] Figure 4 shows an underframe part 10b in storage/transport position, wherein the
telescopic sleeves 18, 18' and the short pipe pieces 28, 28' are passed down to the
lowermost positions on the outside of the straight portions of the legs 14, 14', simultaneously
as the holding means 20, 20' are rotated 90° in relation to the operative positions,
in order to let all parts occupy the same "plane". In the transport/storage position,
the safety and bracing mechanism 16 may, if desirable, take an inoperative position
such as shown in figure 1.
[0031] In figure 5, a modification of a work table according to the invention has been shown,
a pallet no longer serving as the table top, but instead a plate, the underframe being
the same as before. In figure 5, the holding means 20, 20' have been rotated 180°
in relation to the operative position of figures 1 - 3, so that they form opposing
holders. Here, an ordinary plate 48 replaces the pallet 46,46',46". The simplest way
of mounting such a plate 48 is to push it rectilinearly into the holders formed by
the holding means 20, 20'. An embodiment without the mechanism 16 for the case shown
in figure 5, may also be used.
[0032] When a pallet is used as a table top, the upper leg portions 14a, 14a' may project
somewhat above the upper ends of the telescopic sleeves 18, 18'. In the embodiment
according to figure 5, this is not desired and, therefore, each of the telescopic
sleeves 18, 18' with its holding means 20, 20' is caused to take a position in the
vertical plane, with the holding means 20, 20' situated at a higher level than in
the remaining figures.
[0033] When a resilient hoop-shaped body 12 is chosen to form an underframe part 10a or
10b, respectively, based on the hoop body's 12 shape and design in combination with
the inherent resilience of the used material, the shown circumferential shape of the
hoop body 12 is advantageous. The shape may be considered as being developed with
a starting-point in a substantially right-angled hoop having rounded corners, but
where the freely projecting U-legs 14, 14' have been pressed together at a not insignificant
distance from the U-hoop web 14", so that the U-hoop web 14" is connected with each
rectilinear leg portion through a convexly curved bend 14b passing into a concavely
curved bend 14c which, in its turn, passes uniformly into the adjacent, straight U-leg
portion, figure 5.
[0034] The invention is defined by the appended claims and is not restricted to the shown
embodiments and detailed shapes and designs. Thus, each underframe part 10a, 10b may
alternatively be made of pipes/rods of a rigid, non-flexible material, replacing the
resilient pipes/rods. In such a case, the U-hoop web 14" must be divided and provided
with a joint having a horizontal rotational axis in the position of use. In such a
case, the hoop body 12 may, possibly, have a more simple circumferential shape, the
bend 14b, 14c in each corner being replaced by a rounded corner portion having a smaller
radius than the bend 14b, 14c shown. Besides the adjustment possibility in the vertical
direction, the underframe parts 10a, 10b may also be longitudinally adjustable.
[0035] Thus, in figure 6 is shown an adjustable underframe part 10b adaptable to pallets
having differing widths. At least one articulated arm 32' is divided, each articulated
arm part 32a', 32a" being provided with a linear row of holes 50, 50'. Two bolts 52,
52' secure the connection of the parts 32a', 32a" in the adjusted positions thereof.
[0036] The U-hoop web 14" is divided correspondingly, one tubular part 14a" being provided
with a linear row of holes 54, the other tubular part 14a' of the U-hoop web 14" being
provided with a connecting member 56 provided with a linear row of holes 58 as well
as being insertable into and withdrawable from the U-hoop web part 14a", the holes
54 and 58 being adapted to correspond with each other for a common locking bolt 60.
1. An underframe (10a,10b) to be used when building a work bench or work table including
a table top (46,46',46"; 48), said underframe (10a,10b) comprising at least two substantially
identical underframe parts (10a, 10b) each consisting of an elastically compliant,
rebounding hoop-like body (12) having freely projecting legs (14, 14') taking upright
positions in the work bench's or work table's position of use, each of said legs (14,
14'), through a sleeve (18, 18') telescopically displaceable and rotatable on each
leg (14, 14'), carrying a holding means (20, 20') shaped for engagement with said
table top (46,46',46"; 48), said underframe part (10a,10b) carrying a safety and bracing
device (16) for securing said legs (14, 14') in the operative positions thereof, with
said holding means (20, 20') in active engagement with the table top (46,46',46";
48), characterized in that each hoop-like body (12) is elastically compliant and rebounding in the plane thereof,
exhibiting an approximately U-shape course, and that each of the holding means (20,
20') has a, in said position of use, lying U-shape, wherein upper end portions (14a,
14a') of said approximately U-shaped hoops are situated at a larger distance from
the table top (46,46',46"; 48) in an inoperative position of readiness of the respective
U-shaped hoop (12) than in the engagement positions of the holding means (20, 20'),
the safety and bracing device (16) associated with each underframe part (10a, 10b)
and adapted to secure the holding means (20, 20') in an operative engagement with
the table top (46,46',46"; 48) and simultaneously brace an underframe structure, said
safety and bracing device (16) comprising two interhinged, mutually rotatable and
lockable articulated arms (32, 32'), the outer end of each of said articulated arms
(32, 32') being linked to one of said legs (14, 14') through a pipe piece (28, 28')
associated with each articulated arm (32, 32'), said pipe piece (28, 28') being longitudinally
displaceably and non-rotatably disposed on the outside of each leg (14, 14') associated
thereto through one of said telescopically displaceable sleeves (18, 18').
2. An underframe as set forth in claim 1, characterized in that each of the holding means (20, 20') exhibits a certain resilient clamping effect
between U-branches thereof.
3. An underframe as set forth in claim 1 or 2, characterized in that the holding means (20, 20') each has a substantial extent in a horizontally extending
position of use corresponding to about four/five times the diameter of the telescopic
sleeves (18, 18') carrying the same and that, therefore, the rotational capability
of each of the telescopic sleeves (18, 18') around the associated leg (14, 14') of
the hoop body (12) may be utilized when the respective underframe part (10a, 10b)
is to be brought into space-saving transport/storage position, so that the holding
means (20, 20') which in an operative position extend laterally of the plane of the
hoop body (12), are caused to take a position in said hoop plane.
4. An underframe as set forth in claim 1, 2 or 3, characterized in that one articulated arm (32) of the safety and bracing mechanism (16), at the inner end
thereof, is linked to the other articulated arm (32') in a point (40) situated intermediate
the ends of said other articulated arm (32'), a free end of the last-mentioned articulated
arm (32') having a locking means (42) for releasable interconnection to the first-mentioned
articulated arm (32)in a point between the two ends of the latter, said two articulated
arms (32, 32'), in their mutually lockable position, being aligned with each other,
one articulated arm (32) extending in the extension of the other (32'), corresponding
to the safety and bracing mechanism's (16) operative position which it takes in the
operative position of the respective underframe part (10a, 10B), the inoperative position
of said mechanism (16) corresponding to the released articulated arms (32, 32') after
they have rotated about the common pivot point (40) thereof, taking inclined positions.
5. An underframe as set forth in any one of the preceding claims, characterized in that said hoop-like body (12) which, possibly, consists of a bended pipe, has a, in the
position of use substantially horizontal, hoop web (14") provided with small foot
pieces in the form of underlying screw heads (38, 38') of screws or the like, screwed
into said web (14").
6. An underframe as set forth in any one of the preceding claims 1-5, characterized in that it is provided with travelling wheels.
7. An underframe as set forth in any one of the preceding claims, characterized in that each of said hoop-like bodies (12) are made from pipes of a material having elastically
compliant, rebounding properties, and that the hoop body (12), from a substantially
rectilinear, in the position of use horizontal web portion (14"), at each end of the
latter has a marked, convexly curved bend (14b) passing into a less marked, concavely
curved bend (14c), each of said concave bends (14c) passing into a rectilinear portion
of the adjacent leg (14, 14'), the distance between the outer points of the convexly
curved bends (14b) significantly exceeding the largest distance between the legs (14,
14') in the operative positions thereof.
8. An underframe as set forth in one or more of the preceding claims 1 - 6, characterized in that the hoop body (12) is rigid and divided, preferably in the mid-region of the web's
(14") length, where a joint connects the halves of the hoop body (12).
9. An underframe as set forth in one or more of the preceding claims, characterized in that each underframe part (10, 10b) is lengthenable/shortenable in the direction of the
U-hoop web (14") and fastenable in a number of differing, adjusted positions.
10. An underframe as set forth in claim 4, characterized in that at least one articulated arm (32') is divided, each of the two arm parts (32a', 32a")
being provided with aligned, straight rows of holes (50, 50') for common locking means
(52, 52'), securing the arm parts (32a', 32a") in one of a number of adjusted positions,
and that the U-web (14") also is divided, one (14") of the hoop web parts (14a', 14a")
being provided with a number of holes (54), the other U-hoop web part (14a') being
provided with a connecting/adjusting member (56) insertable into the first-mentioned,
tubular U-hoop web part (14a"), said connecting/adjusting member (56) being provided
with a number of holes (58) aligned with the holes (54) of the first-mentioned U-hoop
web part (14a"), at least one locking means (60) being provided, adapted for insertion
into and through two corresponding, aligned holes (54, 58) in the adjusted, lengthened/shortened
position of the U-hoop web (14").
1. Ein Untergestell (10a, 10b) für die Bildung einer Werkbank oder eines Arbeitstisches
mit einer Tischplatte (46,46',46''; 48), umfassend mindestens zwei im wesentlichen
identische Untergestellteile (10a, 10b), wobei jedes aus einem elastisch rückfedernden
bügelförmigen Körper (12) mit zwei frei vorstehenden Beinen (14, 14') besteht, welche
in der Arbeitsposition der Werkbank oder des Arbeitstisches eine aufrechte Position
einnehmen, wobei jedes der Beine (14, 14') ein Haltemittel (20, 20') trägt, welches
für einen Eingriff mit der Tischplatte (46,46',46''; 48) ausgebildet ist und welches
mittels einer Buchse (18, 18') teleskopartig verschiebbar und auf jedem Bein (14,
14') rotierbar ist, wobei das Untergestellteil (10a,10b) ein Sicherheits- und Verstrebungselement
(16) trägt zur Sicherung der Beine (14,14') in ihrer Arbeitsposition mit den Haltemitteln
(20,20') im aktiven Eingriff mit der Tischplatte (46,46',46"; 48),
dadurch gekennzeichnet, dass jeder bügelförmige Körper (12) in seiner Ebene elastisch rückfedernd ausgebildet
ist, wobei er eine mindestens annähernd u-förmige Bahn beschreibt, und dass jedes
der Haltemittel (20,20') in dieser Arbeitsposition eine liegende U-Form aufweist,
wobei in einer nichtoperativen Bereitschaftsposition des mindestens annähernd u-förmigen
Bügels (12) obere Endbereiche (14a,14a') dieses Bügels in einem grösseren Abstand
von der Tischplatte (46,46',46''; 48) angeordnet sind als in der Eingriffsposition
der Haltemittel (20,20'), dass das Sicherheits- und Verstrebungselement (16), welches
mit jedem Untergestellteil (10a, 10b) kombiniert ist und welches zur Sicherung des
Haltemittel (20,20') im operativen Eingriff mit der Tischplatte (46,46',46''; 48)
ausgebildet ist und welches gleichzeitig eine Untergestellstruktur verstrebt, zwei
gelenkig verbundene, miteinander rotierbare und arretierbare Gelenkarme (32,32') aufweist,
wobei das äussere Ende jedes Gelenkarmes (32,32') über ein jedem Gelenkarm (32,32')
zugeordnetes Rohrstück (28,28') mit einem der Beine (14,14') verbunden ist, wobei
dieses Rohrstück (28,28') in Längsrichtung verschiebbar und nichtrotierbar auf der
Aussenseite jedes Beines (14,14') angeordnet und mit diesem mittels einer der teleskopartig
verschiebbaren Buchsen (18, 18') verbunden ist.
2. Ein Untergestell nach Anspruch 1, dadurch gekennzeichnet, dass jedes der Haltemittel (20,20') einen gewissen federnden Klammereffekt zwischen den
U-Bereichen aufweist.
3. Ein Untergestell nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass jedes der Haltemittel (20,20') einen substantiellen Ausdehnung in eine horizontale
Arbeitsausdehnungsrichtung aufweist, wobei die Ausdehnung bis zu vier/fünf mal dem
Durchmesser der dieses tragenden teleskopartigen Buchse (18,18') entspricht und dass
deshalb die Rotationsfähigkeit jedes der teleskopartigen Buchsen (18,18') um das zugehörige
Bein (14,14') des bügelförmigen Körpers (12) benützbar ist, wenn der entsprechende
Untergestellteil (10a, 10b) in eine raumsparende Transport/Lagerposition gebracht
werden soll, so dass die Haltemittel (20,20'), welche sich in einer Arbeitsposition
quer zur Ebene des bügelförmigen Körpers (12) erstrekken, in eine Position in dieser
Ebene des Bügels gezwungen werden.
4. Ein Untergestell nach einem der Ansprüche 1, 2 oder 3, dadurch gekennzeichnet, dass ein Gelenkarm (32) des Sicherheits- und Verstrebungsmechanismus (16) an seinem inneren
Ende mit einem anderen Gelenkarm (32') verbunden ist in einem Punkt (40), welcher
zwischen den Enden des anderen Gelenkarmes (32') angeordnet ist, wobei ein freies
Ende des letztgenannten Gelenkarmes (32') ein Fixierungsmittel (42) aufweist zur lösbaren
Verbindung mit dem erstgenannten Gelenkarm (32) in einem Punkt zwischen den zwei Enden
des letzteren, wobei beide Gelenkarme (32,32') in ihrer gemeinsam fixierbaren Position,
welche der Arbeitsposition des Sicherheits- und Verstrebungsmechanismus (16) entspricht,
die in der Arbeitsposition der Untergestellteile (10a,10b) eingenommen wird, parallel
zueinander ausgerichtet sind, wobei ein Gelenkarm (32) sich in der Verlängerung des
anderen (32') erstreckt und wobei die Nichtarbeitsposition des Mechanismus (16) den
gelösten Gelenkarmen (32,32') entspricht, nachdem sie um den gemeinsamen Drehpunkt
(40) rotiert sind und geneigte Positionen angenommen haben.
5. Ein Untergestell nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der bügelförmige Körper (12), welcher insbesondere aus einem gebogenen Rohr besteht,
in der Arbeitsposition ein im wesentlichen horizontales Bügelsteg (14'') aufweist,
welcher mit schmalen Fussstücken in der Form von unterliegenden Schraubenköpfen (38,38')
von Schrauben oder ähnlichem versehen ist, die in den Steg (14'') eingeschraubt sind.
6. Ein Untergestell nach einem der vorhergehenden Ansprüche 1-5, dadurch gekennzeichnet, dass es mit Transporträdern versehen ist.
7. Ein Untergestell nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jedes der bügelförmigen Körper (12) aus Rohren aus einem Material gemacht ist, welches
elastisch biegsame, rückstellende Eigenschaften aufweist und dass der bügelförmige
Körper (12) an jedem Ende eines im wesentlichen gradlinigen, in der Arbeitsposition
horizontalem Stegteil (14'') eine markierte, konvexe Biegung (14b) aufweist, welche
in eine mit weniger Markierungen versehene, konkave Biegung (14c) übergeht, wobei
jede dieser konkaven Biegungen (14c) in einen geradlinigen Abschnitt des benachbarten
Beins (14,14') übergeht, wobei der Abstand zwischen den äusseren und inneren Punkten
der konvexen Biegungen (14b) den grössten Abstand zwischen den Beinen (14,14') in
der Arbeitsposition signifikant übertrifft.
8. Ein Untergestell nach einem der vorhergehenden Ansprüche 1-6, dadurch gekennzeichnet, dass der bügelförmige Körper (12) steif und geteilt ausgebildet ist, vorzugsweise in der
mittleren Region der Länge des Stegs (14''), wo eine Verbindung die zwei Hälften des
bügelförmigen Körpers (12) verbindet.
9. Ein Untergestell nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jeder Untergestellteil (10, 10b) in der Richtung des U-Bügelstegs (14'') verlängerbar
und verkürzbar ist und in einer Anzahl verschiedener, vorgegebener Positionen fixierbar
ist.
10. Ein Untergestell nach Anspruch 4, dadurch gekennzeichnet, dass mindestens ein Gelenkarm (32') unterteilt ist, wobei jeder der zwei Armteile (32a,32a')
mit ausgerichteten, geraden Reihen von Löchern (50,50') für bekannte Verschlussmittel
(52,52') versehen ist, welche die Armteile (32a', 32a'') in einer von einer Anzahl
vorgegebener Positionen sichern, und dass der U-Steg (14'') ebenfalls geteilt ist,
wobei einer (14'') der Bügelstegteile (14a', 14a'') mit einer Anzahl von Löchern (54)
versehen ist und wobei der andere U-Bügelstegteil (14a') mit einem Verbindungs/Justier-Element
(56) versehen ist, welches in den erstgenannten rohrförmigen U-Bügelstegteil (14a'')
einführbar ist, wobei dieses Verbindungs/Justier-Element (56) mit einer Anzahl von
Löchern (58) versehen ist, welche in einer Linie mit den Löchern (54) des erstgenannten
U-Bügelstegteil (14a'') ausgerichtet sind, wobei mindestens ein Verschlussmittel (60)
vorgesehen ist, welches in der ausgerichteten, gekürzten oder verlängerten Position
des U-Bügelstegs (14'') zur Einführung in und durch zwei korrespondierende ausgerichtete
Löcher (54,58) ausgebildet ist.
1. Châssis (10a, 10b) à utiliser lors de la construction d'un établi ou d'une table de
travail incluant une tablette (46, 46', 46'' ; 48), ledit châssis (10a, 10b) comprenant
au moins deux parties de châssis substantiellement identiques (10a, 10b), chacune
consistant en un corps rebondissant en forme de cercle souple élastiquement (12) possédant
des pieds en saillie libre (14, 14'), prenant des positions verticales dans la position
d'utilisation de l'établi ou de la table de travail, chacun des pieds (14, 14'), à
travers un manchon (18, 18') déplaçable télescopiquement et orientable sur chaque
pied (14, 14'), supportant des moyens de retenue (20, 20') formés pour être en prise
avec ladite tablette (46, 46', 46'' ; 48), ladite partie de châssis (10a, 10b) supportant
un dispositif de sécurité et d'arrimage (16) pour arrimer lesdits pieds (14, 14')
dans leurs positions actives, lesdits moyens de retenue (20, 20') étant en prise active
avec la tablette (46, 46', 46'' ; 48),
caractérisé en ce que chaque corps en forme de cercle (12) est souple élastiquement et rebondit dans son
plan, présentant une forme approximativement en forme de U et en ce que chacun des moyens de retenue (20, 20') possède, dans ladite position active, une
forme en U horizontal, dans lequel les parties d'extrémité supérieure (14a, 14a')
desdits cercles approximativement en forme de U sont situées à une distance plus grande
de la tablette (46, 46', 46'' ; 48) dans une position de repos de disponibilité du
cercle en forme de U respectif (12) que dans les positions en prise des moyens de
retenue (20, 20'), le dispositif de sécurité et d'arrimage (16) est associé à chaque
partie du châssis (10a, 10b) et adapté pour arrimer les moyens de retenue (20, 20')
dans une prise active avec la tablette (46, 46', 4 6'' ; 48) et arrime simultanément
une structure de châssis, ledit dispositif de sécurité et d'arrimage (16) comprenant
deux bras articulés verrouillables, pouvant être mutuellement pivotés et verrouillés
(32, 32'), l'extrémité extérieure de chacun desdits bras articulés (32, 32') étant
reliée à un desdits pieds (14, 14') à travers une pièce formant tuyau (28, 28') associée
à chaque bras articulé (32, 32'), ladite pièce formant tuyau (28, 28') étant déplaçable
longitudinalement et placée de manière à ne pas pouvoir être pivotée en dehors de
chaque pied (14, 14') qui y est associé à travers un desdits manchons déplaçables
télescopiquement (18, 18').
2. Châssis selon la revendication 1, caractérisé en ce que chacun des moyens de retenue (20, 20') présente un certain effet de préhension souple
entre leurs branches en forme de U.
3. Châssis selon la revendication 1 ou 2, caractérisé en ce que chacun des moyens de retenue (20, 20') possède une extension substantielle dans une
position d'emploi extensible horizontalement correspondant à environ quatre/cinq fois
le diamètre des manchons télescopiques (18, 18') les supportant et en ce que, ainsi, la capacité rotative de chacun des manchons télescopiques (18, 18') autour
du pied associé(14, 14') du corps en cercle (12) peut être utilisée lorsque la partie
du châssis respective (10a, 10b) doit être amenée dans une position de gain d'espace
pour le transport/stockage, afin que les moyens de retenue (20, 20') qui, dans une
position active, s'étendent latéralement au plan du corps en cercle (12), sont forcés
de prendre une position dans ledit plan en cercle.
4. Châssis selon la revendication 1, 2 ou 3, caractérisé en ce qu'un bras articulé (32) du mécanisme de sécurité et d'arrimage (16), à son extrémité
intérieure, est relié à l'autre bras articulé (32') en un point (40) situé entre les
extrémités dudit autre bras articulé (32'), une extrémité libre du dernier bras articulé
mentionné (32') possédant des moyens de verrouillage (42) pour une interconnexion
détachable au premier bras articulé mentionné (32) en un point entre les deux extrémités
de ce dernier, lesdits deux bras articulés (32, 32'), dans leur position mutuellement
verrouillable, étant alignés l'un par rapport à l'autre, un bras articulé (32) s'étendant
dans l'extension de l'autre (32'), correspondant à la position active du mécanisme
de sécurité et d'arrimage (16) qu'il prend dans la position active de la partie de
châssis respective (10a, 10b), la position de repos dudit mécanisme (16) correspondant
aux bras articulés détachés (32, 32') après qu'ils ont tourné autour de leur point
de pivot commun (40), prenant des positions inclinées.
5. Châssis selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit corps en forme de cercle (12) qui consiste éventuellement en un tuyau coudé,
possède, dans une position d'emploi sensiblement horizontale, une âme en cercle (14'')
fournie avec de petites pièces formant base sous la forme de têtes de vis sous-jacentes
(38, 38') de vis ou similaires, vissées dans ladite âme (14'').
6. Châssis selon l'une quelconque des revendications précédentes 1 à 5, caractérisé en ce qu'il est fourni avec des galets de translation.
7. Châssis selon l'une quelconque des revendications précédentes, caractérisé en ce que chacun desdits corps en forme de cercle (12) est composé à partir de tuyaux d'un
matériau possédant des propriétés souples élastiquement et rebondissantes et en ce que le corps en cercle (12), à partir d'une partie d'âme horizontale sensiblement rectiligne
en position d'emploi (14''), à chaque extrémité de cette dernière, possède un coude
marqué incurvé de manière convexe (14b) passant dans un coude moins marqué incurvé
de manière concave (14c), chacun desdits coudes concaves (14c) passant dans une partie
rectiligne du pied adjacent (14, 14'), la distance entre les points extérieurs des
coudes incurvés de manière convexe (14b) dépassant de manière significative la distance
la plus grande entre les pieds (14, 14') dans leurs positions actives.
8. Châssis selon une ou plusieurs des revendications précédentes 1 à 6, caractérisé en ce que le corps en cercle (12) est rigide et divisé, de préférence dans la région médiane
de la longueur de l'âme (14''), où un joint relie les moitiés du corps en cercle (12).
9. Châssis selon une ou plusieurs des revendications précédentes, caractérisé en ce que chaque partie de châssis (10,10b) peut être allongée/ raccourcie dans la direction
de l'âme en cercle en forme de U (14'') et attachée dans un nombre de positions ajustées
différentes.
10. Châssis selon la revendication 4, caractérisé en ce qu'au moins un bras articulé (32') est divisé, chacune des deux parties du bras (32a',
32a'') étant fournie avec des rangées de trous alignées et droites (50, 50') pour
les moyens de verrouillage communs (52, 52'), arrimant les parties du bras (32a',
32a'') dans un nombre de positions ajustées et en ce que l'âme en forme de U (14'') est également divisée, une des parties (14'') des parties
de l'âme en cercle (14a', 14a'') étant fournie avec un nombre de trous (54), l'autre
partie de l'âme en cercle en forme de U (14a') étant fournie avec un élément formant
connexion/ajustement (56) insérable dans la première partie de l'âme en cercle en
forme de U mentionnée (14a''), ledit élément formant connexion/ajustement (56) étant
fourni avec un nombre de trous (58) alignés avec les trous (54) de la première partie
de l'âme en cercle en forme de U mentionnée (14a''), au moins un moyen de verrouillage
(60) étant fourni adapté pour l'insertion dans et à travers deux trous correspondant
alignés (54, 58) dans la position alignée allongée/raccourcie de l'âme en cercle en
forme de U (14'').