[0001] The invention relates to industrial sewing work e.g. in a ready-made clothing workshop.
[0002] For such an application the invention provides an industrial sewing system, comprising:
- an industrial sewing machine provided with a motor, particularly an electro-motor,
said motor comprising an adjustable coupling for adjusting the operation speed of
the sewing machine,
a control pedal, connected with the coupling by means of connecting means, and
- a table for supporting the sewing machine.
[0003] Preferably the system is implemented such that the table comprises:
- a support structure,
- a table top supported by said support structure for supporting said sewing machine,
- height-adjusting means for adjusting the height of the table top, and
- angle-adjusting means for adjusting the angular position of said table top.
[0004] The use of height-adjusting means and angle-adjusting means appears to be of the
utmost importance in practice to have the staff members work with the system in an
ergonomically responsible fashion. It appears that resulting from a correct height-
and angle-adjustment which every staff member can choose at his or her own wishes
and ideas, the working position can improve in such a way relative to a usual position
that one has to assume and maintain during a working day for many hours, that back-aches,
shoulder-aches and other complaints that can cause a relatively high illness-absenteeniism,
appear to occur substantially little often.
[0005] A simple embodiment is that, of which the height-adjusting means comprise at least
one leg having an adjustable length, said leg comprising:
- two hollow leg portions which are relatively telescopically shiftable and can be locked
in a chosen position, the lower leg portion can rest on the floor, if necessary by
means of a foot, and the upper leg portion is coupled with the table top by means
of coupling means,
- driving means for relatively shifting said leg parts, said driving means comprising:
- an operating member such as a hand-operable handle for a motor, and
- a screw spindle and a nut cooperating therewith, the one of which is rigidly fixed
to the one portion of a leg and the other is connected with the other portion of that
leg in a rotational fashion, but locked for axial movement, and can be rotated by
said operating member.
[0006] Preferably the support structure comprises two legs. In order to nevertheless be
able to adjust the height of such a table with simple means, that embodiment may serve,
that has the feature that the support structure comprises at least two legs and in
that the height-adusting means have one operating member in common.
[0007] In a specific embodiment the system is characterized by a connection tube extending
between both legs, a driving rod extending through said tube, and being driveable
at the one side by height-adjusting operating means present at the one leg and, at
the other hand, can drive the height-adjusting operating means present at the other
leg.
[0008] In this last connection it should be noted that the rotatable driveable coupling
rod between both height-adjusting operating means can also be present at the upper
side. In the above described embodiment the connection tube serves as envelope or
socket for the drive rod, but also for stiffening the structure, which may be of great
importance, particularly in view of the large weight of industrial sewing machines.
[0009] An alternative embodiment which is very easily and readily operable is characterized
by an operating handle coupled with a driving shaft for driving the height-adjusting
means.
[0010] A simple embodiment of the system displaces the feature in that the angle-adjusting
means comprise:
- a hinge,
- a slit hole having the shape of an argue of a circle concentric with said hinge, said
hole cooperating with a locking screw, said slit hole and said locking screw being
present in and connected with the support structure and/or the table top, respectively,
for fixing the chosen angular position of the table top.
[0011] In a practical embodiment the system has the characterizing feature that the driving
shaft carrying the handle is carried by a bearing at the table top, in such a way
that the handle extends in outward direction relative thereto, and that the driving
shaft is hingeable or flexible, e.g. a flexible shaft or a shaft having at least cardanic
coupling.
[0012] In a certain embodiment the system has the feature that the adjusting pedal comprises
a hingeable foot operating plate and a control arm, and that
the connection means comprise two bowden-cables that can be loaded by said control
arm for tensile forces for increase in an increasing degree and in a decreasing degree,
respectively, activating the coupling for increasing and decreasing respectively,
the operating speed of the sewing machine.
[0013] Also the invention relates to a sewing machine table as specified above as a part
of a system according to the invention.
[0014] Furthermore the invention relates to an operating pedal for an industrial sewing
machine as specified above as a part of the system according to the invention.
[0015] Figures 1-4 enclosed herewith show several features and particulars of the system
according to the invention.
Figure 1 shows an industrial sewing machine system in perspective view;
Figure 2 shows the sewing machine table according to Figure 1 in a perspective view
partly broken-away;
Figure 3 shows a perspective view partly broken-away of the operating pedal;
Figure 4 shows the control pedal according to Figure 3 in another embodiment which
is connected with the coupling between the motor and the sewing machine by means of
bowden-cables.
[0016] Figure 1 shows an industrial sewing system, comprising:
an industrial sewing machine 1 provided with an electro-motor 2, said electro-motor
comprising an adjustable coupling for adjusting the operating speed of the sewing
machine 1,
an operable and controllable pedal 3 connected with said coupling by means of two
bowden-cables 4, and
a table 5 for supporting the sewing machine 1.
[0017] The table 5 comprises:
two legs 6, 7,
a table top 8 carried by said legs for supporting the sewing machine 1,
height-adusting means to be specified herein below for adjusting the height of the
table top 8, and
angle-adjusting means to be specified herein below for adjusting the angular position
of the table top.
[0018] The legs 6, 7 each have an adjustable height and thereto comprise each:
two hollow leg parts 9, 10, 11 and 12 that can shift relative to each other and can
be locked in a chosen position, the lower leg parts 9, 11 being adapted to rest on
the floor by means of a foot 13, and the upper leg parts 10, 12 being coupled with
the table top 8 by means of adjustable coupling means 14, and
driving means for relatively shifting the leg parts 9, 10; 11, 12, said driving means
comprising:
a hand-operable handle 15, and
a screw spindle 16 and a nut 17 cooperating therewith, the nut 17 being rigidly coupled
with the leg portion 11 (in this case for brevity's sake only the structure of leg
7 is described), in which the handle 15 can by means of a pinion system 8 bring the
screw spindle 16 into rotation for height-adjustment of the table top. Thereto between
both legs 6, 7 a connection tube 19 extends through which a rotatable driving rod
20 extends, which at the one side is driven by a pinion system 18 and at the other
side drives the pinion system 21 present at a leg 6. Thus the height-adjusting means
have one operating member in common, namely the handle 15.
[0019] The angle-adjusting means comprise:
a hinge 14 present at both sides of the table top, and
a slit hole 22 having the shape of an argue of a circle concentrically arranged relative
to said hinge and cooperating with a locking screw 23, by means of which the table
top can be fixed relative to the legs 6, 7 in a chosen angular position of the table
top 8.
[0020] The driving shaft 24 carrying handle 15 is supported tiltably at the table top 8
by means of a bearing 25 and comprises a cardanic coupling 26.
[0021] The control pedal 3 according to Figure 3 comprises a foot 27 and a foot-operable
plate 29 coupled therewith by means of hinges 28. The bowden-cables 4 mentioned already
can be loaded on tensile forces by the control arm 30 arranged on plate 29 in an increasing
and decreasing degree, respectively, due to which the coupling (not shown) forming
part of motor 2 can be activated in a higher or lesser degree for increasing and decreasing
respectively, the operating speed of the sewing machine at constant driving speed
of the motor.
[0022] Figure 4 shows an operating pedal 31 in an alternative embodiment. The bowden-cables
4 in this structure are connected with a fixed sleeve 32 and a height-adjustable inner
member 33, respectively, the height of which can vary as a reaction on the operation
of the control pedal 31. The inner member 33 controls the coupling mentioned.
1. Industrial sewing system, comprising:
- an industrial sewing machine provided with a motor, particularly an electro-motor,
said motor comprising an adjustable coupling for adjusting the operation speed of
the sewing machine,
a control pedal, connected with the coupling by means of connecting means, and
- a table for supporting the sewing machine.
2. System according to claim 1,
characterized in that the table comprises:
- a support structure,
- a table top supported by said support structure for supporting said sewing machine,
- height-adjusting means for adjusting the height of the table top, and
- angle-adjusting means for adjusting the angular position of said table top.
3. System according to claim 2,
characterized in that the height-adjusting means comprise at least one leg having an adjustable length,
said leg comprising:
- two hollow leg portions which are relatively telescopically shiftable and can be
locked in a chosen position, the lower leg portion can rest on the floor, if necessary
by means of a foot, and the upper leg portion is coupled with the table top by means
of coupling means,
- driving means for relatively shifting said leg parts, said driving means comprising:
- an operating member such as a hand-operable handle for a motor, and
- a screw spindle and a nut cooperating therewith, the one of which is rigidly fixed
to the one portion of a leg and the other is connected with the other portion of that
leg in a rotational fashion, but locked for axial movement, and can be rotated by
said operating member.
4. System according to claim 2, characterized in that the support structure comprises at least two legs and in that the height-adusting means
have one operating member in common.
5. System according to claim 4, characterized by a connection tube extending between both legs, a driving rod extending through said
tube, and being driveable at the one side by height-adjusting operating means present
at the one leg and, at the other hand, can drive the height-adjusting operating means
present at the other leg.
6. System according to claim 2, characterized by an operating handle coupled with a driving shaft for driving the height-adjusting
means.
7. System according to claim 2,
characterized in that the angle-adjusting means comprise:
- a hinge,
- a slit hole having the shape of an argue of a circle concentric with said hinge,
said hole cooperating with a locking screw, said slit hole and said locking screw
being present in and connected with the support structure and/or the table top, respectively,
for fixing the chosen angular position of the table top.
8. System according to claim 6, characterized in that the driving shaft carrying the handle is carried by a bearing at the table top, in
such a way that the handle extends in outward direction relative thereto, and that
the driving shaft is hingeable or flexible, e.g. a flexible shaft or a shaft having
at least cardanic coupling.
9. System according to claim 1, characterized in that the adjusting pedal comprises a hingeable foot operating plate and a control arm,
and that
the connection means comprise two bowden-cables that can be loaded by said control
arm for tensile forces for increase in an increasing degree and in a decreasing degree,
respectively, activating the coupling for increasing and decreasing respectively,
the operating speed of the sewing machine.
10. Sewing machine table as specified in any one of claims 2-8.
11. Operating pedal for an industrial sewing machine as specified in claim 9.