Wheelchair profile bending device

Abstract

The utility model relates to the field of bending devices, in particular to a wheelchair profile bending device. The technical problems that according to an existing wheelchair sectional material bending device, a wheelchair sectional material is usually bent after being positioned through a fixedly-arranged limiting structure, adjustment is not convenient to conduct according to different wheelchair sectional materials, and consequently the working efficiency is reduced are solved, and compared with a traditional wheelchair sectional material bending device, the wheelchair sectional material bending device has the advantage that the working efficiency is lowered. Comprising a workbench, a first bending assembly, a second bending assembly, a first limiting assembly, a second limiting assembly, a third limiting assembly, a foot column, a balancing weight and a bending profile, and the first limiting assembly and the second limiting assembly which can be adjusted are arranged and can be adjusted according to different bending requirements to fix the wheelchair profile; the first bending assembly and the second bending assembly can bend different wheelchair profiles, and automatic bending can be achieved by arranging the first bending assembly and the second bending assembly which are driven by the first driving motor and the second driving motor.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of bending device, especially a wheelchair profile bending device. BACKGROUND

[0002] Wheelchair is the chair that can help to replace walking, divided into manual and electric two types, wheelchair is the important tool of rehabilitation, it is not only the walking aid of the person with physical disabilities and the person who can't walk, more importantly, they make them exercise the body and participate in social activities with the help of wheelchair, wheelchair profile refers to the frame material for making wheelchair, usually is metal material, such as aluminum alloy, stainless steel etc., the bending of wheelchair profile is to reduce the phenomenon of fatigue strength reduction caused by stress concentration, make the force of wheelchair base more reasonable, the wheelchair profile bending device is used for bending the equipment of wheelchair profile, the existing wheelchair profile bending device usually positions the wheelchair profile through the limiting structure of fixed setting and then carries out the bending treatment, is inconvenient to adjust according to different wheelchair profiles, leading to the decline of work efficiency. SUMMARY

[0003] In order to overcome the existing wheelchair profile bending device, usually through the limiting structure of fixed setting and then carries out the bending treatment, is inconvenient to adjust according to different wheelchair profiles, leading to the decline of work efficiency.

[0004] The technical scheme of the utility model is: a wheelchair profile bending device, including workbench, first bending assembly, second bending assembly, first limiting assembly, second limiting assembly, third limiting assembly, foot column, counterweight and bending profile, the upper end rear part of workbench is equipped with the first bending assembly for bending wheelchair profile, the upper end front part of workbench is symmetrically equipped with two groups of second bending assembly for bending wheelchair profile, the upper end of workbench is equipped with the annular groove for the sliding of second bending assembly corresponding to second bending assembly, the annular groove is equipped with the sliding slot for the sliding of first limiting assembly in the middle, the sliding slot is uniformly equipped with three groups of first limiting assembly for limiting wheelchair profile, the sliding slot is equipped with a plurality of fixed holes for mounting and fixing first limiting assembly in linear distribution on both sides, the upper end side of workbench is symmetrically equipped with a plurality of screw grooves for fixing second limiting assembly, wherein two groups of screw grooves are equipped with second limiting assembly for limiting wheelchair profile, the upper end of workbench is equipped with a plurality of third limiting assemblies for limiting wheelchair profile, the first limiting assembly is equipped with bending profile for processing.

[0005] Preferably, by setting the first limiting assembly and the second limiting assembly that can be adjusted, the wheelchair profile can be fixed according to the different adjustment positions of the wheelchair profile and the bending requirements, so that the first bending assembly and the second bending assembly can bend different wheelchair profiles. By setting two groups of symmetrically arranged second bending assemblies and second limiting assemblies, bidirectional bending processing and unidirectional bending can be performed. By setting the first bending assembly, multiple limiting can be performed in cooperation with the first limiting assembly, the second limiting assembly and the third limiting assembly, and the wheelchair profile is bent on the basis of limiting. By setting multiple first limiting columns at different intervals on the upper end of the turntable, different thicknesses of wheelchair profiles can be limited, and different limiting methods can be formed by clamping the wheelchair profile between different first limiting columns during bending, so as to complete different bending requirements. By setting the first bending assembly and the second bending assembly driven by the first drive motor and the second drive motor, automatic bending can be realized, avoiding time-consuming and laborious manual operation. Multiple limiting can be completed under the action of the first limiting assembly, the second limiting assembly and the third limiting assembly, so that corresponding adjustment can be made according to different bending requirements, which is more convenient and suitable, and the bending effect is better.

[0006] As a preferred, the first bending assembly comprises a turntable, a first drive motor, a shaft and a first limiting column, the turntable is rotatably connected with the first drive motor through the shaft, the first drive motor drives the shaft to rotate to drive the turntable to rotate synchronously, and the upper end of the turntable is provided with multiple groups of first limiting columns arranged at different intervals and used for limiting the wheelchair profile. By setting multiple first limiting columns at different intervals on the upper end of the turntable, different thicknesses of wheelchair profiles can be limited.

[0007] As a preferred, the second bending assembly comprises a second limiting column, a third limiting column, a connecting block and a second drive motor, the upper end of the second limiting column and the third limiting column is fixedly connected through the connecting block, the second limiting column extends through the upper end of the workbench to the lower end and is rotatably connected with the second drive motor, the second drive motor drives the second limiting column to rotate to drive the third limiting column to rotate along the annular groove. By setting the second drive motor to drive the second limiting column to rotate, the second limiting column can drive the third limiting column to rotate synchronously along the annular groove, so that the wheelchair profile is bent during rotation.

[0008] As preferred, the first limiting assembly comprises a T-shaped slider, a limiting ring and a bolt, the middle of the upper end of the T-shaped slider is provided with the limiting ring for limiting the wheelchair profile, the left and right sides of the upper end of the T-shaped slider are symmetrically provided with the bolts for fixing the T-shaped slider, the bolts extend through the upper end of the T-shaped slider to the lower end and are fixed on the workbench through the fixing holes, the T-shaped slider can be fixed in different fixing holes by screwing the bolts, the T-shaped slider can be adjusted to different positions, so that the limiting ring on the T-shaped slider can limit wheelchair profiles of different lengths.

[0009] As preferred, the second limiting assembly comprises a fourth limiting column, a threaded column and a handle, the fourth limiting column is symmetrically provided with two groups, the lower end of the two groups of fourth limiting columns is provided with the threaded column for threaded connection with the threaded groove, the upper end of the fourth limiting column is provided with the handle for conveniently rotating the fourth limiting column, the fourth limiting column can be conveniently screwed off or fixed in different fixing holes by setting the handle.

[0010] As preferred, the third limiting assembly comprises a limiting block, the limiting block is symmetrically provided with two groups, the side close to each other of the two groups of limiting blocks is provided with the arc-shaped groove for limiting the wheelchair profile, the arc-shaped groove is set in the inner side of the two groups of limiting blocks, so that the smoothness can be increased, and the limiting block can be prevented from being damaged in the bending process.

[0011] As preferred, the lower end of the workbench is provided with the foot column around the four corners for supporting, the lower end of the foot column is provided with the counterweight for increasing the stability of the workbench, the counterweight can increase the weight, so that the stability of the workbench can be improved.

[0012] The utility model discloses the beneficial effects of:

[0013] 1. Compared with the traditional wheelchair profile bending device, the structure is relatively complex, and the wheelchair profile is usually positioned and bent by the fixed limiting structure, which is not convenient to adjust according to different wheelchair profiles, resulting in low work efficiency. By setting the first limiting assembly and the second limiting assembly, the position of the wheelchair profile can be adjusted according to different wheelchair profiles and bending requirements, so that the first bending assembly and the second bending assembly can bend different wheelchair profiles. By setting the first limiting assembly in linear distribution, the wheelchair profile can be sleeved and limited. By setting the T-shaped slider, the T-shaped slider can be slidably connected with the sliding groove, so that the T-shaped slider can be slidably moved to different positions along the sliding groove. By opening a plurality of fixing holes on both sides of the sliding groove, the T-shaped slider can be adjusted to different positions by connecting the bolts with different fixing holes, so that the limiting ring on the T-shaped slider can limit the wheelchair profile of different lengths. By setting the second limiting assembly, the other end of the wheelchair profile can be limited. By setting the second limiting assembly as an adjustable structure, the fourth limiting column can be installed in different threaded grooves to limit the wheelchair profile, and the bending angle can be changed, so that different bending requirements can be met. By setting the second bending assembly, the first limiting assembly and the second limiting assembly can be used to limit and bend the wheelchair profile. By setting the second drive motor, the second limiting column can be driven to rotate, so that the second limiting column can drive the third limiting column to rotate synchronously along the ring groove, so that the wheelchair profile can be bent during rotation. By setting two groups of symmetrically arranged second bending assemblies and second limiting assemblies, bidirectional bending treatment and unidirectional bending can be realized.

[0014] 2、By setting first bending assembly can cooperate with first limiting assembly, second limiting assembly and third limiting assembly for a variety of limiting, and on the basis of limiting wheelchair profile bending treatment, by setting a plurality of first limiting column in different spacing on the upper end of the turntable can be used for limiting different thickness of wheelchair profile, and can be in the process of bending by the wheelchair profile card in different first limiting column between the formation of different limiting mode, to complete different bending requirements, by setting the first drive motor can drive the rotating shaft to drive the turntable to rotate, so that the turntable drive the first limiting column above synchronous rotation to wheelchair profile bending treatment, by setting a plurality of different direction of third limiting assembly can be in the process of bending with first bending assembly and second bending assembly for limiting wheelchair profile to complete multiple bending or different bending requirements, by setting two groups of symmetrically arranged limiting block can clamp wheelchair profile, and by setting arc slot in the inner side of the two limiting block can increase the smoothness, avoid in the bending of the limit block is broken, by setting the first bending assembly and second bending assembly driven by the first drive motor and second drive motor can realize automatic bending, avoid manual operation time consuming and laborious, under the action of the first limiting assembly, second limiting assembly and third limiting assembly can complete a variety of limiting, so that can be according to different bending requirements for corresponding adjustment, more convenient and suitable, bending effect is better. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 The overall schematic view of the wheelchair profile bending device of the present application is shown.

[0016] Fig. 2 The overall schematic view of the wheelchair profile bending device of the present application is shown.

[0017] Fig. 3 The overall schematic view of the wheelchair profile bending device of the present application is shown.

[0018] Fig. 4 The overall schematic view of the wheelchair profile bending device of the present application is shown.

[0019] Fig. 5 The overall schematic view of the wheelchair profile bending device of the present application is shown.

[0020] Fig. 6 The overall schematic view of the wheelchair profile bending device of the present application is shown.

[0021] Explanation of reference signs: 1, workbench; 2, first bending assembly; 3, second bending assembly; 4, first limiting assembly; 5, second limiting assembly; 6, third limiting assembly; 7, ring groove; 8, threaded groove; 9, sliding groove; 10, fixing hole; 11, foot column; 12, counterweight; 13, bending profile; 201, rotating disc; 202, first driving motor; 203, rotating shaft; 204, first limiting column; 301, second limiting column; 302, third limiting column; 303, connecting block; 304, second driving motor; 401, T-shaped sliding block; 402, limiting ring; 403, bolt; 501, fourth limiting column; 502, threaded column; 503, handle; 601, limiting block; 602, arc-shaped groove. DETAILED DESCRIPTION

[0022] The utility model is further explained below in combination with the drawings and examples.

[0023] Please refer to Figs. 1-2 The utility model provides a kind of example: a wheelchair profile bending device, including workbench 1, first bending assembly 2, second bending assembly 3, first limiting assembly 4, second limiting assembly 5, third limiting assembly 6, foot column 11, counterweight 12 and bending profile 13, the upper end rear portion of workbench 1 is equipped with the first bending assembly 2 for bending wheelchair profile, the upper end front portion of workbench 1 is symmetric left and right and is equipped with two groups of second bending assembly 3 for bending wheelchair profile, the upper end of workbench 1 is equipped with ring groove 7 for the sliding of second bending assembly 3 corresponding with second bending assembly 3, sliding groove 9 for the sliding of first limiting assembly 4 is opened in the middle of two ring grooves 7, three groups of first limiting assembly 4 for limiting wheelchair profile are evenly arranged in sliding groove 9, a plurality of fixed holes 10 for installing fixed first limiting assembly 4 are evenly opened in the linear distribution of the two sides of sliding groove 9, a plurality of threaded grooves 8 for fixing second limiting assembly 5 are evenly opened in the upper end side of workbench 1, wherein two threaded grooves 8 are installed with second limiting assembly 5 for limiting wheelchair profile, a plurality of third limiting assemblies 6 for limiting wheelchair profile are provided on the upper end of workbench 1, bending profile 13 for processing is sleeved in first limiting assembly 4, foot column 11 for supporting is provided around the lower end of workbench 1, counterweight 12 for increasing the stability of workbench 1 is provided at the lower end of foot column 11, by setting counterweight 12, weight can be increased, so as to improve the stability of workbench 1.

[0024] Please refer to Figs. 3-4In the embodiment, the first bending assembly 2 comprises a rotating disc 201, a first driving motor 202, a rotating shaft 203 and a first limiting column 204. The rotating disc 201 is rotationally connected with the first driving motor 202 through the rotating shaft 203. The first driving motor 202 drives the rotating shaft 203 to rotate and drives the rotating disc 201 to rotate synchronously. The upper end of the rotating disc 201 is provided with a plurality of groups of first limiting columns 204 with different intervals for limiting the wheelchair profile. The plurality of groups of first limiting columns 204 with different intervals arranged on the upper end of the rotating disc 201 can be used for limiting wheelchair profiles with different thicknesses. The third limiting assembly 6 comprises a limiting block 601. The limiting block 601 is symmetrically provided with two groups. The two groups of limiting blocks 601 are both provided with an arc-shaped groove 602 for limiting the wheelchair profile on the side close to each other. The arc-shaped groove 602 arranged on the inner side of the two groups of limiting blocks 601 can increase the smoothness and avoid damaging the limiting block 601 during the bending process.

[0025] Please refer to Figs. 5-6 In the embodiment, the second bending assembly 3 comprises a second limiting column 301, a third limiting column 302, a connecting block 303 and a second driving motor 304. The upper end of the second limiting column 301 is fixedly connected with the third limiting column 302 through the connecting block 303. The second limiting column 301 extends through the upper end of the workbench 1 to the lower end and is rotationally connected with the second driving motor 304. The second driving motor 304 drives the second limiting column 301 to rotate and drives the third limiting column 302 to rotate along the ring groove 7. The second driving motor 304 drives the second limiting column 301 to rotate, so that the second limiting column 301 can drive the third limiting column 302 to rotate synchronously along the ring groove 7, so as to bend the wheelchair profile during the rotation. The first limiting assembly 4 comprises a T-shaped sliding block 401T, a limiting ring 402 and a bolt 403. The upper end of the T-shaped sliding block 401T is provided with a limiting ring 402 for limiting the wheelchair profile. The upper end of the T-shaped sliding block 401T is symmetrically provided with a bolt 403 on the left and right sides for fixing the T-shaped sliding block 401T. The bolt 403 extends through the upper end of the T-shaped sliding block 401T to the lower end and is installed and fixed on the workbench 1 through the fixing hole 10. By tightening the bolt 403, the T-shaped sliding block 401T can be fixed in different fixing holes 10. The T-shaped sliding block 401T can be adjusted to different positions, so that the limiting ring 402 on the T-shaped sliding block 401T can limit the wheelchair profile with different lengths.

[0026] As preferred, the second limiting assembly 5 comprises a fourth limiting post 501, a threaded post 502 and a handle 503, the fourth limiting post 501 is symmetrically provided with two groups, the lower ends of the two groups of fourth limiting posts 501 are provided with threaded posts 502 for threaded connection with the threaded slots 8, the upper ends of the fourth limiting posts 501 are provided with handles 503 for facilitating rotation of the fourth limiting posts 501, and the handles 503 are arranged to facilitate screwing off or fixing the fourth limiting posts 501 in different fixing holes 10.

[0027] In the working process, first, a limiting mode is selected according to the characteristics of the wheelchair profile to be bent or the bending requirement;

[0028] When a longer wheelchair profile needs to be bent, the profile is limited by the first limiting assembly 4 and the second limiting assembly 5, and then the wheelchair profile is bent in two directions by the second bending assembly 3, the first limiting assembly 4 is adjusted to a suitable position along the sliding groove 9, and then the T-shaped sliding block 401T is fixed in the corresponding fixing hole 10 by the bolt 403;

[0029] Then, the second limiting assembly 5 is adjusted to the corresponding position according to the corresponding bending requirement, and the fourth limiting post 501 is installed and fixed in the threaded slot 8 at the corresponding position by rotating the handle 503;

[0030] Then, the wheelchair profile is passed through between the two groups of fourth limiting posts 501, the second limiting post 301 and the third limiting post 302, and the limiting ring 402, so that the two ends are symmetrical;

[0031] Then, the switch of the second driving motor 304 is turned on, the second limiting post 301 is driven to rotate by the second driving motor 304, so that the second limiting post 301 drives the third limiting post 302 to rotate synchronously along the ring groove 7 to bend the wheelchair profile;

[0032] When a shorter wheelchair profile is bent, it can be bent in one direction by the second bending assembly 3 on one side, or the wheelchair profile can be bent by the first bending assembly 2;

[0033] When the first bending assembly 2 is used to bend the wheelchair profile, the profile is inserted between the corresponding first limiting posts 204 according to the characteristics of the wheelchair profile, and the two ends of the profile are limited by the third limiting assembly 6 at both ends;

[0034] Finally, the first driving motor 202 drives the rotating shaft 203 to drive the rotating disc 201 to rotate, so that the rotating disc 201 drives the first limiting post 204 to rotate synchronously to bend the wheelchair profile;

[0035] In the process of bending, different bending requirements are completed by multiple sets of third limiting components 6 and first limiting components 4 and second limiting components 5 in different directions.

[0036] Through the above steps, the staff first selects a limiting mode according to the characteristics or bending requirements of the wheelchair profile to be bent, when the wheelchair profile needs to be bent, the profile is limited by the first limiting assembly 4 and the second limiting assembly 5, and then the second bending assembly 3 is used for bidirectional bending of the wheelchair profile, the first limiting assembly 4 is adjusted to the appropriate position along the sliding groove 9, the T-shaped sliding block 401T is fixed through the fixing hole 10 at the corresponding position through the bolt 403, the second limiting assembly 5 is adjusted to the corresponding position according to the corresponding bending requirements, the fourth limiting column 501 is installed and fixed in the threaded groove 8 at the corresponding position by rotating the handle 503, the T-shaped sliding block 401T can be connected with the sliding groove 9 through the T-shaped sliding block 401T, so that the T-shaped sliding block 401T can be moved to different positions along the sliding groove 9, a plurality of fixing holes 10 are arranged on both sides of the sliding groove 9, so that the T-shaped sliding block 401T can be adjusted to different positions by connecting the bolt 403 with different fixing holes 10, so that the limiting ring 402 on the T-shaped sliding block 401T can limit the wheelchair profile of different lengths, then the wheelchair profile is passed through the fourth limiting column 501, the second limiting column 301 and the third limiting column 302 and the limiting ring 402, so that the two ends are symmetrical, then the switch of the second drive motor 304 is turned on, the second drive motor 304 drives the second limiting column 301 to rotate, so that the second limiting column 301 drives the third limiting column 302 to rotate synchronously along the ring groove 7 to bend the wheelchair profile, when the shorter wheelchair profile is bent, one-way bending is performed through the second bending assembly 3 on one side, or the wheelchair profile is bent through the first bending assembly 2, the second bending assembly 3 and the second limiting assembly 5 arranged in a symmetrical manner can be used for bidirectional bending and unidirectional bending, when the first bending assembly 2 is used for bending the wheelchair profile, the profile is inserted between the corresponding first limiting columns 204 according to the characteristics of the wheelchair profile, and the two ends of the profile are limited by the third limiting assemblies 6 at both ends, finally the first drive motor 202 drives the rotating shaft 203 to drive the rotating disc 201 to rotate, so that the rotating disc 201 drives the first limiting column 204 to rotate synchronously to bend the wheelchair profile, in the process of bending, a plurality of third limiting assemblies 6, first limiting assemblies 4 and second limiting assemblies 5 of different directions are matched to form a plurality of limiting modes to complete different bending requirements, the first bending assembly 2 and the second bending assembly 3 driven by the first drive motor 202 and the second drive motor 304 can realize automatic bending, avoiding time-consuming and laborious manual operation, a plurality of limiting modes can be completed under the action of the first limiting assembly 4, the second limiting assembly 5 and the third limiting assembly 6, so that the corresponding adjustment can be made according to different bending requirements, which is more convenient and applicable, and the bending effect is better.

[0037] The embodiment of the utility model is explained in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiment, and various changes can be made within the knowledge range possessed by the person skilled in the art without departing from the purpose of the utility model.

Claims

1. A wheelchair profile bending device comprising a worktable (1); characterized in that: Also include the first bending assembly (2), the second bending assembly (3), the first limiting assembly (4), the second limiting assembly (5), the third limiting assembly (6), the foot column (11), the counterweight (12) and the bending profile (13), the upper end rear of the workbench (1) is provided with the first bending assembly (2) for bending wheelchair profile, the upper end front of the workbench (1) is provided with two groups of the second bending assembly (3) for bending wheelchair profile, the upper end of the workbench (1) is provided with the ring groove (7) for the second bending assembly (3) to slide, the middle of the two groups of ring grooves (7) is provided with the sliding groove (9) for the first limiting assembly (4) to slide, the sliding groove (9) is uniformly provided with three groups of the first limiting assembly (4) for limiting wheelchair profile, the two sides of the sliding groove (9) are linearly distributed and uniformly provided with a plurality of the fixing hole (10) for mounting the first limiting assembly (4), the upper end side of the workbench (1) is symmetrically and uniformly provided with a plurality of the screw groove (8) for fixing the second limiting assembly (5), two groups of screw grooves (8) are provided with the second limiting assembly (5) for limiting wheelchair profile, the upper end of the workbench (1) is provided with a plurality of the third limiting assembly (6) for limiting wheelchair profile, the first limiting assembly (4) is provided with the bending profile (13) for processing.

2. A wheelchair profile bending device according to claim 1, characterized in that: The first bending assembly (2) comprises a rotating disc (201), a first driving motor (202), a rotating shaft (203) and a first limiting column (204), the rotating disc (201) is rotatably connected with the first driving motor (202) through the rotating shaft (203), the first driving motor (202) drives the rotating disc (201) to rotate synchronously by driving the rotating shaft (203) to rotate, the upper end of the rotating disc (201) is provided with a plurality of first limiting columns (204) for limiting wheelchair profile, which are arranged at different intervals.

3. The wheelchair profile bending device according to claim 1, characterized in that: The second bending assembly (3) comprises a second limiting column (301), a third limiting column (302), a connecting block (303) and a second driving motor (304), the upper ends of the second limiting column (301) and the third limiting column (302) are fixedly connected through the connecting block (303), the second limiting column (301) extends through the upper end of the workbench (1) to the lower end and is rotatably connected with the second driving motor (304), the second driving motor (304) drives the third limiting column (302) to rotate along the ring groove (7) by driving the second limiting column (301) to rotate.

4. The wheelchair profile bending device according to claim 1, characterized in that: The first limiting assembly (4) comprises a T-shaped sliding block (401), a limiting ring (402) and a bolt (403), the upper end of the T-shaped sliding block (401) is provided with the limiting ring (402) for limiting wheelchair profile, the upper end side of the T-shaped sliding block (401) is symmetrically provided with the bolt (403) for fixing the T-shaped sliding block (401), the bolt (403) extends through the upper end of the T-shaped sliding block (401) to the lower end and is fixed on the workbench (1) through the fixing hole (10).

5. The wheelchair profile bending device according to claim 1, characterized in that: The second limiting assembly (5) comprises fourth limiting columns (501), threaded columns (502) and handles (503), the fourth limiting columns (501) are symmetrically provided with two groups, the lower ends of the two groups of fourth limiting columns (501) are provided with threaded columns (502) for being threadedly connected with the threaded grooves (8), and the upper ends of the fourth limiting columns (501) are provided with handles (503) for conveniently rotating the fourth limiting columns (501).

6. A wheelchair profile bending device according to claim 1, characterized in that: The third limiting assembly (6) comprises limiting blocks (601), the limiting blocks (601) are symmetrically provided with two groups, and the sides of the two groups of limiting blocks (601) close to each other are both provided with arc-shaped grooves (602) for limiting the wheelchair profiles.

7. The wheelchair profile bending device according to claim 1, characterized in that: The lower ends of the four corners of the workbench (1) are circumferentially provided with foot columns (11) for supporting, and the lower ends of the foot columns (11) are provided with counterweights (12) for increasing the stability of the workbench (1).

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