TECHNICAL FIELD
[0001] The present invention relates to a device for personal safety on scaffolds according
to the precharacterizing clause of Patent Claim 1 below.
BACKGROUND ART
[0002] In assembled scaffolds, there are means for personal protection against falling in
the form of fixed guard rails which are coupled between the scaffold uprights in a
scaffold. At the same time, these form stabilizing parts of the scaffold and hold
the scaffold uprights in an erect position.
[0003] When scaffolds are being erected and dismantled, scaffold erectors often work on
the parts of the scaffold which do not have guard rails. In order to provide protection
against falling, use is made of safety harnesses with lifelines which, however, limit
the freedom of movement of the person. Safe anchoring points must be selected and
moved as the work progresses.
[0004] Attempts have been made to arrange movable guard rails for erecting and dismantling
operations (see for example
GB 1 528 220), but these have proved difficult to handle for scaffold erectors.
DISCLOSURE OF INVENTION
[0005] The object of the present invention is to produce a device in which extra guard rails
can be handled and moved with great safety.
[0006] The said object is achieved by means of the device according to the present invention,
the characteristics of which emerge from Patent Claim 1 below.
LIST OF FIGURES
[0007] The invention will be described in greater detail below by means of a few illustrative
embodiments with reference to accompanying drawings in which
- Fig. 1
- shows an embodiment of the safety device according to the invention in a perspective
view at an angle from the front, mounted in a lower safety position on a scaffold;
- Fig. 2
- shows the safety device in a position during movement between an upper and a lower
safety position;
- Fig. 3
- shows the safety device in an upper safety position;
- Figs 4, 5 and 6
- show different views of a safety upright forming part of the safety device according
to the invention;
- Figs 7 and 8
- show partial side views of a safety upright with an actuating device and a coupling
device which can be adjusted by the latter in on the one hand locking position and
on the other hand releasing position, and
- Fig. 9
- shows the safety upright from above.
PREFERRED EMBODIMENT
[0008] Figs 1-3 show the construction in principle of a safety device 1 for personal safety
on scaffolds 2. The safety device 1 is shown by somewhat heavier lines, while the
scaffold is shown by somewhat lighter lines in order that the safety device emerges
more clearly. The scaffold comprises a number of scaffold uprights, in the example
shown according to Fig. 1 four uprights 3, 4, 5, 6, which in pairs support between
them at least one working platform 7 which can be positioned at different heights
in order to make work possible at different heights along, for example, the façade
of a house construction. The platform or platforms is or are supported between the
uprights arranged in pairs by virtue of, for example, having hooks which are coupled
to transverse, lying, suitably horizontal scaffold elements 66-73 which extend between
the uprights 3 and 4 and, respectively, 5 and 6.
[0009] The scaffold also includes fixed scaffold rails 64, 65 which are accordingly arranged
so that each scaffold rail is arranged between the two outermost uprights 3 and 6
in order to afford protection in the outward direction, for example at a suitable
height above a working platform 7. These fixed rails can be fastened directly to the
scaffold uprights 3, 6 or to the transverse scaffold elements.
[0010] Erection of the scaffold proceeds from the bottom, as the uprights 3-6 are to rest
with their lower ends 14, 15 against a surface, for example the ground or a floor.
Erection is started by lower sections of at least two uprights, for example 3 and
4, being held in an erect position, standing on the surface, after which two connecting
elements, a scaffold rail and if appropriate the working platform 7 and diagonal elements
(not shown) as well are mounted, at least the lower sections of the four uprights
then being held erect. As erection continues above the working platform 7, heights
are reached which involve risks of accident. For example, the scaffold may be intended
to have such a height that each upright consists of several sections which are joined
to one another, after which scaffold rails and working platforms located above are
to be mounted.
[0011] In order to safeguard personnel when the scaffold is being erected and dismantled,
a safety device 1 according to the invention has therefore been produced, which is
adapted to be moved upwardly or downwardly as the scaffold is being erected and, respectively,
dismantled. To this end, the safety device 1 (see Fig. 1) consists of at least one,
in the example two safety uprights 18, 19 which are each provided with one or more
coupling devices 20, 21, 22, 23 for releasable coupling-together with the scaffold.
In the example shown, each safety upright 18, 19 is provided with two coupling devices
arranged at a distance from one another for a coupling-together which ensures that
the safety uprights extend essentially parallel to the scaffold uprights. The safety
uprights 18, 19 support between them at least one guard rail 24 which, in the example
shown, consists of an upper rail element 25 and a lower rail element 26. The two rail
elements 25, 26 are connected at their ends 27, 28, 29, 30 to the safety uprights
18, 19; to be precise, in the example they are connected to the safety uprights in
an articulated manner, suitably adjacent to the upper end of the safety uprights so
that the upper rail element is located close to the respective upper ends 31, 32,
while the lower rail element 26 is located a little way below at a distance which
is adapted for the protection function concerned.
[0012] For each of the safety uprights 18, 19, the safety device has an actuating device
33, 34 with at least at one end 35, 36 of each safety upright, in the example shown
both ends 35-38, actuating means 39, 40, 41, 42 for adjusting the coupling devices
20-23 between releasing position and coupling position. In the coupling position,
the coupling devices are adapted on the one hand to secure the safety uprights 18,
19 in their parallel position and on the other hand to maintain the selected vertical
position of the safety uprights, that is to say to lock them relative to movements
in the axial direction of the uprights. To this end, the safety uprights receive,
through the coupling devices, support against bearing surfaces in the scaffold, in
the example shown the lying scaffold elements 66-73, that is to say horizontal tubes,
in the example one end side element 10, 12 for each coupling device 20-23.
[0013] Fig. 1 also shows that the end of each rail element 25, 26 is connected in an articulated
manner to its safety upright 18, 19 by means of a fastening arrangement in the form
of an articulation arrangement 43 which makes possible relative articulated movement
of the rail element about an axis 44 which extends essentially at right angles relative
to on the one hand the longitudinal axis of its safety upright and on the other hand
the longitudinal axis of the rail element. The rail elements 25, 26 are therefore
supported at their ends by the safety uprights 18, 19 via the articulation arrangement.
The articulation arrangements can be connected firmly to the uprights but can alternatively
be displaceable between different vertical positions along the uprights and lockable
on these in the selected vertical position.
[0014] Figs 4, 5 and 6 show a safety upright 18 separately from different directions with
the two coupling devices 20, 21, which are therefore located at a distance axially
from the guard rail 24, and with the associated actuating device 33, with its actuating
means 39, 41, one at each end 35, 37 of the safety upright. One of the coupling devices
20 is shown on larger scale in Figs 7-9 and consists in the example shown of a gripping
hook 45 with a downwardly open gripping space 46 which is designed and dimensioned
to receive a lying scaffold element 72 in the scaffold, so that the safety upright
18 rests on the lying scaffold element by means of the coupling device 20. A cross
section of the scaffold element is indicated by broken lines. The gripping space 46
is provided with a gripping opening 47, facing in the direction away from the guard
rail 24, that is to say downwards. The coupling device 20 has a locking means 48 which
is adjustable between a locking position for the coupling device, which is shown in
Fig. 7, and a releasing position which is shown in Fig. 8. In the example shown, the
locking means consists of a locking bolt which is anchored movably in the gripping
hook 45 and can be displaced into and out of the gripping opening 47. In locking position,
the effective downwardly facing gripping opening 47 shrinks to a dimension smaller
than the diameter of the scaffold element 10. The locking bolt 48 is advantageously
designed with a locking surface which, together with the concave inner surface 50
of the gripping hook, is adapted to afford good contact with and stable support against
the outer surface of the scaffold element which is cylindrical in the example shown.
In this connection, the locking bolt can be pushed forward, for example by means of
a diagrammatically illustrated spring mechanism 51, so that play-free contact is obtained
between the support surfaces. In the releasing position according to Fig. 8, it is
possible to pull the gripping hooks 45 of the coupling devices 20 away from the scaffold
element so that the gripping hooks can be taken out of coupling position and removed
from the scaffold element 10 in order to be moved to a new safety position or for
dismantling. It is important that stable support is obtained in the releasing position
as well in order to hold the safety device in a selected vertical position.
[0015] Figs 7-9 also show the actuating device 33 of the coupling devices. Accordingly,
this includes the actuating means 39-42 which are located at the ends of each safety
upright 18, 19. In the example shown, each actuating means consists of a handle which
is mounted rotatably in the upright and, in the example shown, arranged in a rotationally
fixed manner at the upper and the lower end of a turning bar 52 which is mounted rotatably
coaxially in each safety upright and extends all the way through the safety upright
or at least as far as the coupling devices. Arranged at each coupling device is a
movement-transmitting link mechanism 55 which is adapted to convert the actuating
movement of each actuating means 39, 41 into an adjusting movement of the locking
means 48 in the associated coupling device 20 between the locking position according
to Fig. 7 and the releasing position according to Fig. 8. In the example shown, the
movement-transmitting link arm mechanism consists of a link arm 56 and a push rod
57. The link arm 56 is connected to the turning bar 52 in a rotationally fixed manner,
and the push rod 57 is at its one end connected in an articulated manner to the link
arm and at its other end connected to the locking means so as, by the rotary movement,
to bring about a longitudinal displacement movement of the locking means counter to
the action of the spring mechanism 51, for example a helical spring (compression spring)
which is restrained between the locking means and a fixed surface in the coupling
device and is threaded onto the push rod and tends to hold the locking means 48 in
locking position.
[0016] By means of a slot in the articulation point, the push rod 57 and thus the locking
bolt 48 can perform a pure longitudinal displacement movement. Alternatively, the
locking means can be pivotable.
[0017] The coupling devices are suitably arranged firmly on the safety uprights, in the
example shown by virtue of the gripping hook 45 merging with a short arm 58 with a
hole in one of its ends. The hole is dimensioned and shaped so that the safety upright
18 will pass through it. Firm connection can take place by means of a welded joint,
a screwed joint or the like.
[0018] In the example shown, the guard rail 24 in the safety device is continuously extendable,
for example by virtue of each rail element 25, 26 being telescopically extendable
and consisting of, for example, an outer tube 59 and an inner tube 60 which can be
inserted telescopically into the outer tube. More than two tubes can be present in
order to obtain a greater adjustment range. The length-adjustability means that one
and the same safety device can be used for different lengths of working platform 7,
that is to say different distances between the scaffold uprights 18, 19, and makes
possible the successive movement of one safety upright 18, 19 at a time in the safety
device as the scaffold is being erected or dismantled.
[0019] The use of the safety device according to the invention during erection of a scaffold
will now be described below.
[0020] As mentioned previously, the erection of the scaffold proceeds from the bottom, with
the erection of a number of scaffold uprights and the mounting initially of a bracing
scaffold element, which can be mounted at a low height, on the whole by personnel
on the ground. In the example, fixed scaffold rails 64, 65 in the form of lying, longitudinal
scaffold elements are mounted between the two front scaffold uprights 3, 6, after
the transverse, lying scaffold elements 66-73 which are coupled between the front
scaffold uprights 3, 6 on one side and the rear scaffold uprights 4, 5 on the other
side. The first working platform 7 can then be positioned at a suitable height by
its hooks 74, 75, which grip around the transverse scaffold elements 66, 70. Depending
on the height of the final scaffold, use is made of a number of sections for each
scaffold upright, starting with lower sections and then gradually joining on additional
sections as the scaffold is erected. Joining-on is advantageously carried out so that
all sections of the scaffold uprights are arranged along one and the same longitudinal
axis.
[0021] Before personnel step onto the working platform 7, the safety device is mounted so
that the associated guard rail 24 will be located at a suitable safety height above
the working platform (see Fig. 1). Mounting is suitably carried out by two people,
it being possible for the safety device to be assembled on the ground. For transport
purposes, the safety uprights 18, 19 are suitably disconnected from the guard rail
24 at the articulation arrangement 43. In the storage and transport state, the safety
device according to the example shown thus forms essentially a number of parallel
tubes. The mounted safety device 1 is positioned with its two safety uprights 18,
19 on the inside of the scaffold uprights 3, 6 adjacent to which the safety uprights
are to be arranged, in the example the outer uprights. This is carried out at such
a height that, as mentioned above, the guard rail 24 affords effective protection
during subsequent scaffold erection. Furthermore, the coupling devices 20, 21, 22,
23 are adjusted to releasing position, after which their coupling hooks are each made
to grip around a respective lying scaffold element 66, 67, 70, 71 so as to be supported
by the latter by resting on the associated scaffold element. In this connection, the
mounted safety upright 19 is held in a stable support position with a fixed vertical
position. Then, the nearest accessible actuating means, for example the lower actuating
means 41, 42, is activated for adjustment to locking position. Activation takes place
under the action of the spring mechanism 51, which ensures that the locking position
is maintained during use of the safety device. By virtue of the rail elements 25,
26 of the guard rail 24 being connected in an articulated manner at their ends to
the safety uprights and moreover being extendable, erection does not have to take
place entirely synchronously on the two sides, but can take place individually, the
rail elements being, on account of their adjustable length, adaptable to the distance
concerned between the scaffold uprights. The coupling devices are advantageously secured
on the associated scaffold uprights in such a way that the structure is also secured
against movements in the lateral direction. This is achieved either by high friction
in the support surfaces or by the locking means 48 not only locking but clamping or
firmly gripping the scaffold element in the recess 50.
[0022] In its first safety position according to Fig. 1, the safety device 1 can be mounted
either from ground level or from another safe working position, for example from what
is known as a skylift, by virtue of actuating means 39-42 being arranged at both ends
of the safety uprights 18, 19. With the safety device in the position shown, personnel
can very safely remain on the working platform 7 in order to continue the erection
of the scaffold. For example, further sections of scaffold uprights can be added,
after which permanent scaffold rails can be mounted inside the guard rail 24 and a
working platform (not shown) located above can be mounted.
[0023] Before the scaffold is erected further upwards, the safety device 1 according to
the invention is moved further upwards. In this connection, one safety upright 19
is first freed by adjustment (in the example rotation) of one of the actuating means
40, 42 at the ends of the safety upright, suitably the lower end. A scaffold erector
can in this connection activate the actuating means 42 for release, after which he
lifts the safety upright 19 upwards along the scaffold upright 6 (see Fig. 2). This
is possible by virtue of the rail elements 25, 26 being articulated at their fastening
points and telescopically extendable, as can be seen from Fig. 2. When the raised
end of the guard rail 24 has reached the desired height, the safety upright 19 is
coupled to the scaffold close to the scaffold upright 6. The two coupling devices
22, 23 are in this connection each made to grip around a respective lying scaffold
element, in this case two transverse elements 68, 69 which have the same mutual interspace
as the gripping hooks on the safety upright. Then, one of the actuating means 40,
42, suitably the lower actuating means 42, is activated (in the example released)
for changing the coupling devices 22, 23 over to coupled or locked position. In this
connection, the safety upright 19 obtains vertical support against an element in the
scaffold. Support in the lateral direction is obtained by friction in the gripping
hooks and support against the scaffold upright. Special stop means on the lying scaffold
elements are also possible. The other side of the safety device 1 can then be moved
up by the left safety upright 18 being released by means of, for example, the actuating
means 41, after which, for example, a person standing to the left on the working platform
7 can lift the safety upright 18 up to the desired position, suitably with the guard
rail 24 essentially horizontal (see Fig. 3), after which the coupling devices 20,
21 are adjusted to coupling position. It is conceivable for a single scaffold erector
to do this because one safety upright is handled at a time.
[0024] The safety device 1 is then in the safety position according to Fig. 3, and scaffold
erectors can then very safely erect the scaffold further if so required. In this connection,
further scaffold uprights can be added on top of the four scaffold uprights shown,
and a permanent scaffold rail can be mounted inside the guard rail of the safety device.
[0025] When the scaffold is erected, the safety device can in principle remain in its top
position and either afford supplementary protection or if appropriate replace the
top guard rail.
[0026] When the scaffold is dismantled, the procedure is in principle the same as described
above, but in reverse order, as the various elements of the scaffold are taken down
starting from the top.
[0027] The invention is not limited to illustrative embodiments described above and shown
in the drawings but can be varied within the scope of the patent claims below. For
example, it may in some cases be sufficient to have one coupling device on each safety
upright. If this is given a greater extent in the vertical direction, a torsion-resistant
coupling can still be obtained. In principle, it is conceivable for the fastening
devices for the guard rail 24 to be fixed, that is to say not articulated, and for
the rail elements to be unextendable and adapted in their length to the distance between
the scaffold uprights 3, 6. For example, the safety device can permanently have the
appearance the safety device in Figs 1 and 3 has.
[0028] In the case of a safety device with a guard rail without articulations, it is particularly
suitable if such an embodiment is intended for the end sides, that is to say the short
sides, of the scaffold and can still advantageously be coupled to the lying, transverse
scaffold elements on the end sides. In this connection, it is conceivable for the
safety device to be provided with a single safety upright, the guard rail projecting
laterally from the safety upright and therefore being connected to the safety upright
without articulation. Such end side safety devices can moreover be combined with articulated
safety devices according to the example shown, it then being possible therefore for
the guard rail for the long sides to be fastened to a safety upright shared with a
short side. It is also conceivable for only one of the coupling devices to be lockable,
in the case of an articulated construction one lock in each safety upright, in the
case of a rigid construction it is in principle sufficient for one safety upright
to be locked. Furthermore, the coupling devices can be coupled to other parts of the
scaffold, for example one or two at a time of the longitudinal lying (horizontal)
scaffold elements.
[0029] Alternatively, the safety uprights can be coupled to the coupling means of the scaffold
uprights, which may be a cup running around, or a bracket or plate with a hole for
hooking in gripping elements. A combination of gripping hooks for support against
lying elements and hooks for hooking firmly to scaffold uprights is also conceivable.
It is then sufficient for one type of hooks to be lockable. Instead of an actuating
handle and turning bar, another actuating device can be selected, for example a pull/push
rod or wire which is pulled in the axial direction, the actuating means then being
a pull/push means. A common feature of the various coupling devices is that they rest
on an upwardly facing portion of the scaffold in order that the safety upright or
safety uprights will be secured safely to the scaffold in coupling position and released
for movement of the safety device.
1. Device for personal safety on such scaffolds as consist of scaffold uprights (3, 4,
5, 6) and lying scaffold elements (64-73) adapted to be coupled between the uprights,
the safety device consisting of at least one safety upright (18, 19) and at least
one guard rail (24) extending from the safety uprights, the guard rail being fastened
to the associated safety uprights and the said safety device having at least one coupling
device (20-23) for releasable coupling-together with the scaffold, as a result of
which the said safety uprights and the accompanying guard rail can successively be
moved between different vertical positions according to safety requirements, the safety
device (1) comprising at least one actuating device (33, 34) with actuating means
(39-42) for adjusting the said coupling device (20-23) between a releasing position
and a coupling position for coupling safety uprights together with parts of the scaffold
in different vertical positions, the said actuating means (39-42) being arranged at
at least one end of the said safety uprights (18, 19) and being adapted to be adjusted
between releasing position and coupling position and, via actuating-movement-transmitting
means (52, 55, 57) extending along the associated safety uprights, to adjust the coupling
device (20-23) between releasing position and coupling position, characterized in that the coupling devices (20-23) are adapted to support the safety device (1) in both
releasing position and coupling position by resting on an upwardly facing portion
of the scaffold.
2. Device according to Patent Claim 1, characterized in that each coupling device (20-23) has a gripping hook (45), the hook opening (47) of which,
viewed in the longitudinal direction of the safety upright (18, 19), faces away from
the associated guard rail (24), that is to say downwards in the safety position, in
order to grip around a portion of the scaffold.
3. Device according to Patent Claim 1, characterized in that each coupling device (20-23) is held in position in both the vertical direction and
the lateral direction on the scaffold.
4. Device according to Patent Claim 1, characterized in that the actuating means (39-42) are arranged at both ends (35-38) of the said safety
uprights (18, 19).
5. Device according to Patent Claim 1, characterized in that the said actuating-movement-transmitting means (52, 55, 57) comprise an actuating
bar (52) which extends inside the associated safety upright (18, 19).
6. Device according to Patent Claim 5, characterized in that the actuating bar (52) extends through the entire length of the safety upright (18,
19), and in that the actuating means are arranged on both ends of each actuating rod.
7. Device according to Patent Claim 5, characterized in that the actuating bar (52) is mounted rotatably in the safety upright (18, 19).
8. Device according to Patent Claim 7, characterized in that the said actuating means (39-42) consist of a handle which is mounted rotatably relative
to the safety upright (18, 19) at its end and is arranged in a rotationally fixed
manner on the respective end of the actuating bar (52).
9. Device according to Patent Claim 8, characterized in that the turning bar (52) extends from the handle at each end to a link mechanism (55,
57) which is located at each coupling device (20-23) and is adapted to convert the
actuating movement of the actuating bar into an adjusting movement of a locking means
(48) in the associated coupling device between the releasing position and the coupling
position.
10. Device according to Patent Claim 1, characterized in that the number of coupling devices (20-23) is at least two on each safety upright (18,
19).
1. Anordnung zur persönlichen Sicherheit an solchen Arbeitsplattformen, die Pfosten (3,
4, 6, 6) und liegende Stützelemente (64-73) umfassen, welche angepasst sind, zwischen
den Pfosten angekoppelt zu werden, die Sicherheitsanordnung umfasst zumindest einen
Sicherheitspfosten (18, 19) und zumindest eine sich von den Sicherheitspfosten erstreckende
Fangschiene (24), die Fangschiene ist an den zugehörigen Sicherheitspfosten befestigt
und die genannte Sicherheitsanordnung weist zumindest eine Kupplungsanordnung (20-23)
zur lösbaren Zusammenkopplung mit dem Arbeitsgerüst auf, aufgrund dessen können die
genannten Sicherheitspfosten und die begleitende Fangschiene nacheinander in unterschiedliche
vertikale Positionen gemäß der Sicherheitsanforderungen versetzt werden, die Sicherheitsanordnung
(1) umfasst zumindest eine mit Betätigungsmittel (39-42) zur Justierung der genannten
Kupplungsanordnung (20-23) zwischen einer Entsicherungs- und einer Kupplungsposition
vorgesehenen Betätigungsanordnung (33, 34), wobei in der Kupplungsposition Sicherheitspfosten
zusammen mit Teilen der Arbeitsplattform in verschiedenen vertikalen Positionen gekoppelt
sind, das genannte Betätigungsmittel (39-42) ist an zumindest einen Ende der genannten
Sicherheitspfosten (18, 19) angeordnet und ist angepasst, um zwischen einer Auslösungsposition
und einer Kopplungsposition justiert zu werden, und erstreckt sich über ein betätigungsbewegungsübertragendes
Mittel (52, 55, 57) entlang der zugeordneten Sicherheitspfosten, um die Kupplungsanordnung
(20-23) zwischen der Entsicherungs- und der Kupplungsposition zu justieren, dadurch gekennzeichnet, dass
die Kupplungsanordnungen (20-23) derart angepasst sind, um die Sicherheitsanordnung
(1) durch Aufliegen auf einem aufwärts gewandten Teil des Arbeitsgerüsts, sowohl in
der Entsicherungsposition als auch in der Kupplungsposition abzustützen.
2. Anordnung gemäß Anspruch 1, dadurch gekennzeichnet, dass
jede Kupplungsanordnung (20-23) einen Greifhaken (45) aufweist, wobei die Hakenöffnung
(47) der zugehörigen Fangschiene (24) abgewandt ist, bei Ansicht in Längsrichtung
der Sicherheitspfosten (18, 19), das heißt, die Fangschiene (24) ist in der Sicherheitsposition
nach unten angeordnet, um rund um einen Teil der Arbeitsplattform zu greifen.
3. Anordnung gemäß Anspruch 1, dadurch gekennzeichnet, dass
jede Kupplungsanordnung (20-23) sowohl in senkrechter Richtung als auch in Querrichtung
an der Arbeitsplattform in Position gehalten wird.
4. Anordnung gemäß Anspruch 1, dadurch gekennzeichnet, dass die Betätigungsmittel (39-42) an beiden Enden (35-38) der genannten Sicherheitspfosten
(18, 19) angeordnet sind.
5. Anordnung gemäß Anspruch 1, dadurch gekennzeichnet, dass das genannte betätigungsbewegungsübertragende Mittel (52, 55, 57) eine Betätigungsschiene
(52) umfasst, welche sich in den zugeordneten Sicherheitspfosten (18, 19) hinein streckt.
6. Anordnung gemäß Anspruch 5, dadurch gekennzeichnet, dass die Betätigungsschiene (52) sich durch die gesamte Länge des Sicherheitspfosten (18,
19) hindurch erstreckt und dass die Betätigungsmittel an beiden Enden jeder Betätigungsschiene
angeordnet sind.
7. Anordnung gemäß Anspruch 5, dadurch gekennzeichnet, dass die Betätigungsschiene (52) rotierbar im Sicherheitspfosten (18, 19) angeordnet ist.
8. Anordnung gemäß Anspruch 7, dadurch gekennzeichnet, dass das genannte Betätigungsmittel (39-42) aus einem Griff bestehen, welcher relativ
zum Sicherheitspfosten (18, 19) an dessen Ende rotierbar angeordnet ist und am jeweiligen
Ende der Betätigungsschiene (52) rotationsfest angeordnet ist.
9. Anordnung gemäß Anspruch 8, dadurch gekennzeichnet, dass die Drehschiene (52) sich von jedem Ende des Griffs zu einem Gelenkmechanismus (55,
57) hin erstreckt, welcher an jeder Kupplungsanordnung (20-23) angeordnet ist, und
die Drehschiene (52) angepasst ist, die Betätigungsbewegung der Betätigungsschiene
zu einer in der zugehörigen Kupplungsanordnung entstehenden Betätigungsbewegung eines
Sperrmittels (48) zwischen der Entsicherungs- und der Kupplungsposition umzuwandeln.
10. Anordnung gemäß Anspruch 1, dadurch gekennzeichnet, dass die Anzahl der Kupplungsanordnungen (20-23) an jedem Sicherheitspfosten (18, 19)
zumindest zwei ist.
1. Dispositif de sécurité des personnes sur des échafaudages du type constitué de montants
d'échafaudage (3, 4, 5, 6) et d'éléments d'échafaudages couchés (64-73) prévus pour
être couplés entre les montants, le dispositif de sécurité étant constitué d'au moins
un montant de sécurité (18, 19) et au moins un garde-corps (24) s'étendant depuis
les montants de sécurité, le garde-corps étant fixé aux montants de sécurité associés
et ledit dispositif de sécurité ayant au moins un dispositif d'accouplement (20-23)
permettant de le coupler de façon détachable avec l'échafaudage, en conséquence de
quoi lesdits montants et le garde-corps les accompagnant peuvent être successivement
déplacés entre des positions verticales différentes selon les besoins de sécurité,
le dispositif de sécurité (1) comprenant au moins un dispositif d'actionnement (33,
34) présentant des moyens d'actionnement (39-42) destinés à ajuster ledit dispositif
d'accouplement (20-23) entre une position de libération et une position d'accouplement
destinée à coupler les montants de sécurité avec des parties de l'échafaudage dans
différentes positions verticales, lesdits moyens d'actionnement (39-42) étant agencés
sur au moins l'une des extrémités desdits montants de sécurité (18, 19) et étant prévus
pour être ajustés entre la position de libération et la position d'accouplement et,
par l'intermédiaire de moyens de transmission de mouvement d'actionnement (52, 55,
57) s'étendant le long des montants de sécurité associés, pour ajuster le dispositif
d'accouplement (20-23) entre la position de libération et la position d'accouplement,
caractérisé en ce que les dispositifs d'accouplement (20-23) sont prévus pour soutenir le dispositif de
sécurité (1) à la fois dans la position de libération et dans la position d'accouplement
en reposant sur une partie tournée vers le haut de l'échafaudage.
2. Dispositif selon la revendication 1, caractérisé en ce que chacun des dispositifs d'accouplement (20-23) a un crochet de préhension (45), dont
l'ouverture de crochet (47), vue dans la direction longitudinale du montant de sécurité
(18, 19), est tournée dans la direction opposée au garde-corps associé (24), c'est-à-dire
vers le bas en position de sécurité, afin de s'accrocher à une partie de l'échafaudage.
3. Dispositif selon la revendication 1, caractérisé en ce que chacun des dispositifs d'accouplement (20-23) est maintenu dans sa position à la
fois dans la direction verticale et dans la direction latérale sur l'échafaudage.
4. Dispositif selon la revendication 1, caractérisé en ce que les moyens d'actionnement (39-42) sont agencés aux deux extrémités (35-38) desdits
montants de sécurité (18, 19).
5. Dispositif selon la revendication 1, caractérisé en ce que lesdits moyens de transmission de mouvement d'actionnement (52, 55, 57) comprennent
une barre d'actionnement (52) s'étendant vers l'intérieur du montant de sécurité associé
(18, 19).
6. Dispositif selon la revendication 5, caractérisé en ce que la barre d'actionnement (52) s'étend sur toute la longueur du montant de sécurité
(18, 19), et en ce que les moyens d'actionnement sont agencés sur les deux extrémités de chacune des tiges
d'actionnement.
7. Dispositif selon la revendication 5, caractérisé en ce que la barre d'actionnement (52) est montée de façon à pouvoir pivoter dans le montant
de sécurité (18, 19).
8. Dispositif selon la revendication 7, caractérisé en ce que lesdits moyens d'actionnement (39-42) sont constitués d'un levier monté de façon
pivotante par rapport au montant de sécurité (18, 19) à l'emplacement de son extrémité
et agencé de façon fixe et rotative sur l'extrémité respective de la barre d'actionnement
(52).
9. Dispositif selon la revendication 8, caractérisé en ce que la barre de retournement (52) s'étend depuis le levier à chacune des extrémités vers
un mécanisme de liaison (55, 57) situé à l'emplacement de chacun des dispositifs d'accouplement
(20-23) et est prévue pour convertir le mouvement d'actionnement de la barre d'actionnement
en un mouvement d'ajustement d'un moyen de verrouillage (48) dans le dispositif d'accouplement
associé entre la position de libération et la position de couplage.
10. Dispositif selon la revendication 1, caractérisé en ce que le nombre de dispositifs d'accouplement (20-23) est d'au moins deux sur chaque montant
de sécurité (18, 19).