CN213342501U - Test system - Google Patents

Abstract

The utility model discloses a test system, including the support, be used for detecting the detection device of piece that awaits measuring and be used for installing the mounting platform subassembly of the piece that awaits measuring, detection device and mounting platform subassembly all set up in the support, and the piece that awaits measuring is installed when the mounting platform subassembly, and the adjustable relative position and the relative angle of the piece that awaits measuring of mounting platform subassembly and detection device. The utility model provides a test system's mounting platform subassembly can be adjusted installing the piece that awaits measuring on it to the adjustment awaits measuring a distance and an angle with detection device, forms the suitable detection distance and the angle of the piece that awaits measuring of current installation, so that carry out accurate detection to the singleness or the product of optical lens class.

Description

Test system

Technical Field

The utility model relates to a supervisory equipment technical field, more specifically say, relate to a test system.

Background

With the rapid development of the video monitoring field, the popularity of the monitoring equipment is steadily increasing, and the product forms of the monitoring cameras are gradually diversified. Meanwhile, how to ensure the definition of the shot images of the monitoring products with different forms becomes a problem to be solved urgently.

The existing detection method aiming at the definition of the whole equipment is more original: and after the manufactured complete machine is shot and captured by contrasting with a specific test graphic card, manually judging whether a captured picture is clear or not. The definition detection method is low in efficiency and high in manual misjudgment rate, and the production speed of a production line is seriously influenced.

The definition test scheme of the lens monomer of the monitoring equipment is mature, and the MTF curve value of the lens monomer is generally obtained by adopting a collimator and a guide rail bracket to test, so that the imaging quality of the lens monomer is reflected. However, the test scheme and the test object are single, and are limited by the space limitations of the collimator and the guide rail bracket, and only the lens monomer can be tested. The monitoring camera is applied to different use scenes, so that the shapes of the whole equipment are different, and the test cannot be applied to various conditions. In order to be suitable for various situations, the structure is complex and the economical efficiency is poor.

In summary, how to provide a testing system with strong applicability to products with various forms is a problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a test system, this test system's adaptability is strong, can realize the detection to multiple type product.

In order to achieve the above object, the present invention provides the following technical solutions:

the utility model provides a test system, includes the support, is used for detecting the detection device of the piece that awaits measuring and is used for installing the mounting platform subassembly of the piece that awaits measuring, detection device with the mounting platform subassembly all set up in the support, the piece that awaits measuring install in during the mounting platform subassembly, the mounting platform subassembly is adjustable the piece that awaits measuring with detection device's relative position and relative angle.

Preferably, the mounting platform assembly comprises a fixing part, a supporting plate, a clamping device, a lifting adjusting device for adjusting the distance between the piece to be detected and the detecting device and an angle adjusting device;

the fixing part is connected with the support, the supporting plate is connected with the fixing part through the lifting adjusting device, the clamping device is connected with the supporting plate through the angle adjusting device, and the clamping device is used for fixing the piece to be detected.

Preferably, the lifting adjusting device includes a servo motor, a lead screw linear module and a moving block, the servo motor is disposed on the fixing portion, the lead screw linear module is connected to an output end of the servo motor, the moving block is in threaded connection with the lead screw linear module, and the supporting plate is fixed to the moving block.

Preferably, the lifting device further comprises an auxiliary guide rail connected to the other side of the bracket, and the other side of the support plate connected to the moving block is arranged on the auxiliary guide rail and can move along the auxiliary guide rail, so that the support plate is balanced when lifted.

Preferably, the angle adjusting device comprises a plurality of straight rod universal bearings, one end of each straight rod universal bearing is fixed to the supporting plate, the other end of each straight rod universal bearing is connected to the angle adjusting supporting plate, and the clamping device is fixed to the angle adjusting supporting plate.

Preferably, the clamping device comprises a mounting part, a screw rod, a pressing block and a driving part;

at least two the installed part is fixed in the angle modulation backup pad, just the installed part sets up relatively, each the equal threaded connection of installed part corresponds the screw rod, the one end of screw rod sets up the compact heap, and the other end sets up drive assembly, drive assembly is used for the drive the screw rod rotates, in order to drive compact heap removes.

Preferably, the compression block is provided with an elastic buffer piece; and/or the pressing block is connected with the screw rod through a bearing.

Preferably, an arched bracket is arranged at the upper part of the bracket, the detection device comprises a collimator detection device, the arched bracket is provided with at least three collimator detection devices, and the collimator detection devices are arranged in a sliding manner relative to the arched bracket.

Preferably, the support is provided with a positioning detection device for detecting whether the piece to be detected is installed in place, and the positioning detection device is connected with the warning device or the host.

Preferably, the host is arranged on a bottom plate of the bracket and connected with a display; and/or the bottom of the bracket is provided with universal wheels and leveling supporting feet.

The mounting platform component of the testing system provided by the utility model can adjust the piece to be tested mounted on the mounting platform component so as to adjust the distance and the angle between the piece to be tested and the detecting device and form the proper detecting distance and angle of the currently mounted piece to be tested,

the detection device can be specifically a collimator detection device, the mounting platform assembly adjusts the relative position and relative angle of the to-be-detected piece relative to the collimator detection device to change, namely in the process of adjusting the focal length, and correspondingly, the test system is a virtual focus test system for measuring the virtual focus condition. The application provides a test system can promote and carry out accurate and wide detection of accommodation to the singleness or the product of optical lens class.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a front view of a testing system provided by the present invention;

fig. 2 is a schematic view of a mounting platform assembly provided by the present invention;

fig. 3 is a schematic view of a clamping device provided by the present invention.

In fig. 1-3, the reference numerals include:

the device comprises a support 1, a detection device 2, an installation platform assembly 3, a positioning detection device 4, a display 5, a host 6, universal wheels 7 and supporting legs 8, wherein the support is a support;

9 is a lead screw linear module, 10 is a servo motor, 11 is a support plate, 12 is a clamping device, 13 is an angle adjusting support plate, 14 is a straight rod universal bearing, and 15 is an auxiliary guide rail;

16 is an elastic buffer piece, 17 is a pressing block, 18 is a bearing, 19 is a screw rod, 20 is an installation piece, and 21 is a hand wheel.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The core of the utility model is to provide a test system, this test system's adaptability is strong, can realize the detection to multiple type product.

Referring to fig. 1 to 3, fig. 1 is a front view of a testing system provided in the present invention; fig. 2 is a schematic view of a mounting platform assembly provided by the present invention; fig. 3 is a schematic view of a clamping device provided by the present invention.

The utility model provides a test system can be used for detecting optical lens and optical lens's each type product.

The test system comprises a support 1, a detection device 2 and a mounting platform assembly 3, wherein the detection device 2 is used for detecting the performance and other conditions of the piece to be tested, and the mounting platform assembly 3 is used for mounting the piece to be tested.

The detection device 2 and the mounting platform assembly 3 are both arranged on the support 1, and when the piece to be detected is mounted on the mounting platform assembly 3, the mounting platform assembly 3 can adjust the relative position and the relative angle between the piece to be detected and the detection device 2.

The structure of the mounting platform assembly 3 for directly connecting the to-be-detected piece can move and rotate relative to the detection device 2, namely, the change of the position and the change of the angle of the to-be-detected piece relative to the detection device 2 can be realized. Because the detection device 2 is a device for directly testing the piece to be tested, the test of the application is the piece to be tested aiming at the type of the optical lens, the distance between the piece to be tested and the detection device 2 determines the test effect during actual test, and the type of the piece to be tested which can be installed on the installation platform component 3. Because the relative position and relative angle of the piece to be measured and the detection device 2 can be adjusted, the measurement of various types of pieces to be measured can be conveniently realized.

During the use, can adjust mounting platform subassembly 3 to initial position to the installation various types of awaiting measuring piece, after the installation is accomplished, can adjust mounting platform subassembly 3, so that adjust to be measured piece and detection device 2's relative position and relative angle, realize the suitable detection distance and the angle to the piece that awaits measuring of current installation.

The utility model provides a mounting platform subassembly 3 of installation piece that awaits measuring among the test system can be used for adjusting the relative position and the relative angle of piece that awaits measuring and detection device 2 to carry out accurate detection to the singleness or the product of various optical lens class.

Optionally, the mounting platform assembly 3 has a mounting structure with adjustable mounting tightness, and the to-be-measured piece may be an optical lens, such as a lens monomer; or the piece that awaits measuring is the product including optical lens, because there is the difference in the size, in order to make all kinds of products all can install through mounting platform subassembly 3, mounting platform subassembly 3 specifically can install the piece that awaits measuring through clamping device 12, and the clamping degree is adjustable, and the realization that can be convenient is installed the piece that awaits measuring of multiple structure or size to promote the practicality.

On the basis of the above embodiment, the mounting platform assembly 3 includes a fixing portion, a supporting plate 11, a clamping device 12, a lifting adjusting device and an angle adjusting device for adjusting the distance between the to-be-detected piece and the detecting device 2;

the fixing part is connected to the support 1, the supporting plate 11 is connected to the fixing part through the lifting adjusting device, the clamping device 12 is connected to the supporting plate 11 through the angle adjusting device, and the clamping device 12 is used for fixing the piece to be measured.

It should be noted that, relative movement of the to-be-detected piece relative to the detection device 2 in the present application mainly includes relative approach and distance along the connection line of the two, taking the example that the detection device 2 is disposed above the to-be-detected piece, the to-be-detected piece can be vertically lifted, and approach and distance are realized.

The fixing part is of a block structure and is fixed on the support, the fixing part is used for fixing the lifting adjusting device, and the lifting adjusting device can be connected with the controller or the host 6 to realize automatic control and can also be used for carrying out active control on other external equipment. The supporting plate 11 is directly connected to the lifting adjusting device, so that the lifting adjusting device drives the supporting plate 11 to move up and down. The supporting plate 11 is used as a platform for indirectly bearing the clamping device 12, and an angle adjusting device is arranged on the supporting plate, and the clamping device 12 is arranged on the angle adjusting device and used for adjusting the relative angle between the supporting plate 11 and the clamping device 12.

The lifting adjusting device has various types, and for example, the lifting adjusting device can comprise a gear or belt conveying mode and the like. Optionally, the present application is not limited to the lifting movement, and the lifting movement may also be a lateral movement or an oblique movement.

The angle adjusting device has various types, for example, the angle adjusting device may include at least two cylinders, which are respectively connected to different positions of the supporting plate 11, and output ends of the cylinders are respectively connected to different positions of the clamping device 12, and the relative angle of the clamping device 12 with respect to the supporting plate 11 can be changed by the telescopic operation of the two cylinders in different degrees.

In a specific embodiment, the lifting adjusting device includes a servo motor 10, a lead screw linear module 9 and a moving block, the servo motor 10 is disposed on the fixing portion, the lead screw linear module 9 is connected to an output end of the servo motor 10, the moving block is connected to the lead screw linear module 9 in a threaded manner, and the supporting plate 11 is fixed to the moving block.

The lead screw of the lead screw linear module 9 is arranged along the vertical direction, the servo motor 10 drives the lead screw of the lead screw linear module 9 to rotate, the moving block is sleeved on the lead screw, and the supporting plate 11 can be fixed on the moving block through screws to limit the rotation of the moving block, so that the moving block can only move linearly along the lead screw.

The screw linear module 9 may be a ball screw linear module, or may be a screw structure of another type.

Optionally, the servo motor 10 is connected to the host computer 6 or other control devices.

In the embodiment, the precision of the lifting adjustment is considered, the servo motor 10 is selected for control, and the control can also be realized by other control mechanisms with high precision.

The lifting adjusting device can be arranged on one side of the support 1, or lifting adjusting devices are arranged on two sides of the support 1 and are respectively connected with the support plates 11, so that two sides of the support plates 11 can be synchronously controlled.

However, considering the case that the two-side power control is adopted and the two sides may not be synchronous due to instability of the power device, the servo motor 10 is only arranged on one side of the support plate 11 and the auxiliary moving device is arranged on the other side of the support plate 11 in order to ensure the lateral stability of the support plate 11. On the basis of the above embodiment, the device further comprises an auxiliary guide rail 15 connected to the other side of the bracket 1, and the other side of the support plate 11 connected to the moving block is disposed on the auxiliary guide rail 15 and can move along the auxiliary guide rail 15, so that the support plate 11 can keep balance when being lifted.

The auxiliary guide rail 15 is a structure corresponding to the lead screw linear module 9, and a matching sliding structure is arranged on one side of the auxiliary guide rail 15 and one side of the support plate 11 so that the support plate 11 can be slidably arranged on the matching sliding structure.

The auxiliary guide rail 15 is used for realizing auxiliary fixing of the support plate 11, and shaking caused by too large platform area is avoided. The form of the auxiliary guide rail can be referred to the form of the guide rail in the prior art.

On the basis of the above embodiment, the angle adjusting device includes a plurality of straight rod universal bearings 14, one end of each straight rod universal bearing 14 is fixed to the supporting plate 11, the other end of each straight rod universal bearing 14 is connected to the angle adjusting supporting plate 13, and the clamping device 12 is fixed to the angle adjusting supporting plate 13.

The straight rod universal bearing 14 has two end portions, the two end portions can rotate relatively to change the angle, one end of the straight rod universal bearing is connected with the supporting plate 11, the other end of the straight rod universal bearing is connected with the angle adjusting supporting plate 13, and in the process of changing the angle of the plurality of straight rod universal bearings 14, the relative angle between the supporting plate 11 and the angle adjusting supporting plate 13 can be adjusted randomly in space. The number of the straight rod universal bearings 14 is preferably at least 3, and the stability of the angle adjusting support plate 13 can be ensured under the condition that the rotation adjustment of the angle adjusting support plate 13 is ensured.

Specifically, the three straight rod universal bearings 14 are fixed to the support plate 11 through threaded connection, specifically, the three straight rod universal bearings 14 may be the upper surface of the support plate 11, the angle adjusting support plate 13 is fixed to the three straight rod universal bearings 14 through threaded connection, and the angle adjustment of the rotating straight rod universal bearings 14 may be controlled by a hand or a driving device, so as to achieve the angle adjustment of the angle adjusting support plate 13 relative to the support plate 11.

Optionally, the straight rod universal bearing 14 in the above embodiment may be replaced by another universal structure, and may be adjusted according to actual installation requirements.

Optionally, the plurality of straight rod universal bearings 14 may be located on the same straight line, which is convenient for adjustment, but considering the stable support of the angle adjustment support plate 13, the plurality of straight rod universal bearings 14 may not be collinear.

In the embodiment, two or more than two clamping devices 12 are provided, the clamping devices 12 can be fixed on the angle adjusting support plate 13 through screws, the clamping devices 12 can move in the horizontal direction to realize clamping in the horizontal direction, and the two clamping devices 12 are close to each other to realize clamping and fixing of a product.

Besides the straight rod universal bearing 14, a plurality of cylinders at different positions can be used for connecting the support plate 11 and the angle adjusting support plate 13, and the relative angle between the support plate 11 and the angle adjusting support plate 13 can be realized by lifting and lowering the cylinders.

On the basis of the above-described embodiment, the clamping device 12 comprises a mounting 20, a screw 19, a holding-down block 17 and a drive member.

At least two installed parts 20 are fixed in angle modulation backup pad 13, and installed part 20 sets up relatively, the equal threaded connection of each installed part 20 screw rod 19 that corresponds, and screw rod 19's one end sets up compact heap 17, and the other end sets up drive assembly, and drive assembly is used for driving screw rod 19 to rotate to drive compact heap 17 removal.

The mounting part 20 can be a plate or a block, please refer to fig. 3, the mounting part 20 can be an L-shaped mounting plate, and is fixed to the angle adjustment support plate 13, the mounting part 20 is connected to the screw rod 19 through a thread, the screw rod 19 is rotatably disposed in a threaded hole of the mounting part 20, one end of the screw rod 19 of the mounting part 20, which is relatively close to, is provided with a pressing block 17, the screw rod 19 rotates to drive the pressing block 17 to move, the pressing block 17 is relatively close to or away from, the screw rod 19 is connected to a driving part, the driving part can be a hand wheel 21, and the hand wheel 21 is fixed to the end of the screw rod 19, which. Alternatively, the driving member may be other control structures, such as a motor and a pulley.

Optionally, a self-locking nut is arranged on the screw rod 19 to prevent the screw rod 19 from rotating under the non-operating force.

The clamping device 12 adopted in the embodiment can adjust the relative distance, can be suitable for various sizes and types of pieces to be measured, and can clamp the pieces to be measured in an adjusting mode no matter whether the optical lens or various products of the optical lens are used.

Optionally, the compression block 17 is provided with a resilient buffer 16. The elastic buffer 16 is used for avoiding hard damage to the piece to be tested caused by the pressing block 17 due to the fact that the screw rod 19 rotates fast. The elastic buffer 16 may be foam, and the foam is fixed on the compressing block 17.

When the pressing block 17 is about to contact the workpiece, if the pressing block 17 still rotates along with the screw rod 19, damage or position influence may be caused to the workpiece. Optionally, the pressing block 17 is connected with the screw rod 19 through a bearing 18, so that the pressing block 17 is prevented from rotating along with the screw rod 19 when the pressing block 17 is in contact with the piece to be tested or in a state of being about to be tested.

On the basis of any one of the above embodiments, the upper portion of the bracket 1 is provided with an arched bracket, the detection device 2 comprises a collimator detection device, the arched bracket is provided with at least three collimator detection devices, and the collimator detection devices are slidably arranged relative to the arched bracket.

The position of the clamping device 12 is approximately positioned at the lower part of the arched bracket, and three or more than three collimator detecting devices are adjustably arranged on the arched bracket, so that the adjustment of the collimator detecting devices can be always carried out around the clamping device 12.

The collimator detecting device is a detecting device for detecting an optical lens, and the detecting device 2 may be other types of detecting devices.

Correspondingly, the collimator detection device is arranged, so that the virtual focus testing device for measuring the virtual focus condition can be used. The mounting platform assembly 3 adjusts the relative position and the relative angle of the to-be-measured piece relative to the collimator detection device, namely, the process of adjusting the focal length.

Alternatively, the bracket 1 may have a door shape or other shapes.

On the basis of any one of the above embodiments, the bracket 1 is provided with a positioning detection device 4 for detecting whether the piece to be detected is installed in place, and the positioning detection device 4 is connected with the warning device or the host 6.

The positioning detection device 4 is arranged at the side of the bracket 1, and the position can correspond to the position of the clamping device 12. The positioning detection device 4 may be a cross laser positioning device, and the number and the position of the positioning detection device 4 may be adjusted according to actual use. When a to-be-detected piece is detected, the positioning detection device 4 can send a signal to the warning device so that the warning device can send a prompt, or the positioning detection device 4 can send a signal to the host 6 so that the host 6 can obtain the current adjustment state to meet the requirement.

Alternatively, the positioning detection device 4 may be another type of detection device. The warning device comprises a voice prompt device, a lamp tube prompt device and the like, and the prior art can be referred to.

In this embodiment, the positioning detection device 4 is connected with the warning device and the host 6, so that the accurate installation of the to-be-detected piece can be ensured on the basis of facilitating various types of to-be-detected pieces.

Optionally, a host 6 is disposed on a bottom plate of the support 1, and the host 6 is connected to the display 5. The host 6 and the display 5 are arranged on the bracket 1, and when the bracket is movable, the host 6 and the display 5 can move together along with the bracket, thereby being convenient for an operator to use.

Optionally, the bottom of the bracket 1 is provided with a universal wheel 7 and a support foot 8 capable of leveling. Supporting legs 8 and universal wheels 7 which can be leveled are arranged below the support 1 at the same time, so that leveling can be realized, and free movement can be realized.

In a specific embodiment provided by the application, the installation platform assembly 3 can move up and down through the servo motor 10, high-precision positioning can be achieved, the installation platform assembly 3 can also adjust the angle to adapt to products with various shapes, and the clamping device 12 can clamp and fix various different products, so that the application range of the detection device is further enlarged.

The mounting platform assembly 3 can move up and down through the structure of the screw linear module 9, the servo motor 10 and the support plate 11, so that the detection system can be used for detecting lenses and lens type complete machine products with various sizes; the angle of the mounting platform assembly 3 is adjusted through the straight rod universal bearing 14, so that the angle requirements of products in different shapes can be met; the clamping device 12 adopts a clamping and fixing mode, can be used for fixing products with various sizes and structures, and can prevent the products from moving in the measuring process.

Except for the structure and connection relationship of each part of the detection system provided in the above embodiments, please refer to the prior art for the structure of other parts of the detection system, which is not described herein again.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

It is right above that the utility model provides a detecting system has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (10)

1. The utility model provides a test system, its characterized in that includes support (1), is used for detecting detection device (2) of awaiting measuring and is used for installing the mounting platform subassembly (3) of awaiting measuring, detection device (2) with mounting platform subassembly (3) all set up in support (1), the piece that awaits measuring install in during mounting platform subassembly (3), mounting platform subassembly (3) are adjustable the piece that awaits measuring with the relative position and the relative angle of detection device (2).

2. The test system according to claim 1, wherein the mounting platform assembly (3) comprises a fixing portion, a support plate (11), a clamping device (12), a lifting adjusting device and an angle adjusting device for adjusting the distance between the piece to be tested and the detection device (2);

the fixing part is connected with the support (1), the supporting plate (11) is connected with the fixing part through the lifting adjusting device, the clamping device (12) is connected with the supporting plate (11) through the angle adjusting device, and the clamping device (12) is used for fixing the to-be-detected piece.

3. The testing system according to claim 2, wherein the lifting adjusting device comprises a servo motor (10), a lead screw linear module (9) and a moving block, the servo motor (10) is arranged on the fixed portion, the lead screw linear module (9) is connected with an output end of the servo motor (10), the moving block is in threaded connection with the lead screw linear module (9), and the supporting plate (11) is fixed on the moving block.

4. The test system according to claim 3, further comprising an auxiliary guide rail (15) connected to the other side of the support frame (1), wherein the other side of the support plate (11) connected to the moving block is disposed on the auxiliary guide rail (15) and can move along the auxiliary guide rail (15) to keep balance when the support plate (11) is lifted.

5. The testing system according to claim 2, wherein the angle adjustment means comprises a plurality of straight rod universal bearings (14), one end of the straight rod universal bearing (14) is fixed to the support plate (11), the other end is connected to an angle adjustment support plate (13), and the clamping means (12) is fixed to the angle adjustment support plate (13).

6. Test system according to claim 5, characterized in that the clamping device (12) comprises a mounting (20), a screw (19), a compression block (17) and a drive member;

at least two installed part (20) are fixed in angle modulation backup pad (13), just installed part (20) set up relatively, each the equal threaded connection of installed part (20) corresponds screw rod (19), the one end of screw rod (19) sets up compact heap (17), and the other end sets up driving part, driving part is used for the drive screw rod (19) rotate, in order to drive compact heap (17) remove.

7. Test system according to claim 6, characterized in that the holding-down block (17) is provided with an elastic buffer (16); and/or the pressing block (17) is connected with the screw rod (19) through a bearing (18).

8. The testing system according to claim 1, wherein an arched bracket is provided at the upper part of the bracket (1), and the detecting device (2) comprises a collimator detecting device, and the arched bracket is provided with at least three collimator detecting devices, and the collimator detecting devices are slidably arranged relative to the arched bracket.

9. The test system according to any one of claims 1 to 8, wherein the support (1) is provided with a positioning detection device (4) for detecting whether the piece to be tested is mounted in place, and the positioning detection device (4) is connected with a warning device or a host computer (6).

10. The test system according to claim 9, wherein the chassis of the rack (1) is provided with the host computer (6), the host computer (6) being connected to a display (5); and/or the bottom of the bracket (1) is provided with a universal wheel (7) and a leveling supporting foot (8).

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