Display stand for selling organic glass

Abstract

The utility model discloses a showing stand for selling organic glass, which comprises a support bottom plate, a unit column and a storage tray, one side in the storage tray is provided with a mounting cavity, one side in the mounting cavity is provided with a two-way lead screw, one end of the two-way lead screw is fixedly provided with an adjusting knob, movable plates are symmetrically arranged in the mounting cavity, and the movable plates are connected with the unit column. And lead screw sleeves are symmetrically and fixedly installed at one ends of the two movable plates, bidirectional lead screws are connected into the lead screw sleeves in a threaded and sleeved mode, guide sliding rods are symmetrically welded to the other ends of the two movable plates, the guide sliding rods are connected into the guide sliding sleeves in a sleeved mode, and fixing clamps are fixedly installed at the ends, located in the reserved grooves, of the guide sliding rods. The display rack has the advantages that organic glass samples of different specifications and sizes can be placed and fixed within a certain range through the two fixing clamps so as to be displayed and sold, the stability of the organic glass samples in the display process can be guaranteed, the organic glass samples cannot be disengaged from the storage disc to be damaged, and practicability is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of display racks, in particular to a display rack for selling organic glass. Background Art

[0002] Organic glass is a polymer compound formed by the polymerization of methyl methacrylate. It is an important thermoplastic plastic that was developed earlier. Organic glass is divided into four types: colorless transparent, colored transparent, pearlescent, and embossed organic glass. It is commonly known as acrylic, Zhongxuan acrylic, and acrylic. Organic glass has good transparency, chemical stability, mechanical properties and weather resistance, easy dyeing, easy processing, and beautiful appearance. In order to facilitate the display and sale of organic glass, stores often place organic glass samples on display racks for display.

[0003] The prior art discloses a plexiglass rotating display stand with a publication number of CN210227606U, which includes a support column body and a turntable. The support column body is sequentially connected from top to bottom by a sealing plunger head, a plurality of connecting plungers, and a mounting base, and a turntable is sleeved on the groove of each connecting plunger. Through the connection of the sealing plunger head, the connecting plunger, and the mounting base, the number of connecting plungers and turntables used can be adjusted according to demand. The turntable is nested in the concave arc portion of the connecting plunger through a nesting ring portion and can rotate around the central axis of the connecting plunger. The positioning protrusion is aligned and embedded in the groove of the concave arc portion. Each rotation causes the positioning protrusion to be locked into the next groove. Even if the turntable is fixed at an angle, it can correspond to twelve or sixteen viewing angles according to the number of grooves.

[0004] When the utility model is in use, only plexiglass samples of a certain size can be placed in the storage tray, and the scope of application is small. In addition, the plexiglass samples cannot be limited and fixed in the storage tray, making them unstable during sales display. Once impacted, the plexiglass samples are easy to fall out of the storage tray, which not only causes trouble for the staff to organize, but also may cause damage to the plexiglass samples, resulting in economic losses. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the shortcomings of the prior art, the utility model provides a display rack for selling plexiglass, which can place, display and sell plexiglass samples of different specifications and sizes within a certain range, and can ensure the stability of the plexiglass samples during display, and will not fall out of the storage tray and be damaged. It has the advantage of being more practical, thereby solving the problems in the above-mentioned background technology.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned advantages of being able to place, display and sell organic glass samples of different sizes within a certain range, and being able to ensure the stability of the organic glass samples during display, so that they will not fall out of the storage tray and be damaged, and being more practical, the specific technical scheme adopted by the utility model is as follows: a display rack for organic glass sales, including a supporting base plate, a unit column and a storage tray, a mounting column is fixedly installed at the center of the top surface of the supporting base plate, the mounting column and the center of the top surface of the unit column are both provided with threaded holes, a plurality of threaded columns are fixedly installed at the center of the bottom surface of the unit column, and the threaded columns are screwed into the threaded holes, a rotating sleeve is sleeved on the outer side of the unit column, and a connecting sleeve is welded on one side of the rotating sleeve, and a connecting sleeve is provided in the center of the connecting sleeve. A connecting hole is provided, a connecting column is fixedly welded on one side of the storage plate, and the connecting column is inserted into the connecting hole, a storage groove is provided in the center of the storage plate, and reserved grooves are symmetrically provided on the side walls on both sides of the storage groove, and a guide sleeve is fixedly installed on the side wall on one side of the reserved groove, an installation cavity is provided on one side of the storage plate, and a two-way lead screw is installed on one side of the installation cavity, and an adjustment knob is fixedly installed on one end of the two-way lead screw, movable plates are symmetrically arranged in the installation cavity, lead screw sleeves are symmetrically fixedly installed on one end of the two movable plates, and the two-way lead screws are threadedly sleeved on the inner thread of the lead screw sleeve, guide slide rods are symmetrically welded on the other ends of the two movable plates, and the guide slide rods are sleeved in the guide slide sleeve, and a fixing clamp is fixedly installed on one end of the guide slide rod located in the reserved groove.

[0009] Furthermore, a first limiting slip ring is fixedly installed on the side wall of the unit column, a first limiting sliding groove is opened on the inner wall of the rotating sleeve, and a first limiting slip ring is embedded in the first limiting sliding groove, a first blind groove is opened on one side of the inner wall of the rotating sleeve, and a first nut is fixedly installed on one side of the first blind groove, and a first fastening screw is sleeved on the inner thread of the first nut, and the first fastening screw is located at one end of the inner cavity of the first blind groove and is connected to a first anti-slip abutment block.

[0010] Furthermore, a second limiting slip ring is fixedly installed on the side wall of the connecting column, a second limiting sliding groove is opened on the inner wall of the connecting sleeve, and a second limiting slip ring is embedded in the second limiting sliding groove, a second blind groove is opened on one side of the inner wall of the connecting sleeve, and a second nut is fixedly installed on one side of the second blind groove, and a second fastening screw is sleeved on the inner thread of the second nut, and the second fastening screw is located at one end of the inner cavity of the second blind groove and is connected to a second anti-slip abutment block.

[0011] Furthermore, a placement frame is fixedly welded to the outer side wall of the rotating sleeve, and an information plate is inserted into the placement frame.

[0012] Furthermore, the central axes of the supporting base plate, the mounting column, the unit column and the rotating sleeve are on the same straight line.

[0013] Furthermore, the cross-sectional shape of the installation cavity is a concave shape.

[0014] Furthermore, the cross-section of the placement frame is in a concave shape.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model provides a display stand for organic glass sales, which has the following beneficial effects:

[0017] (1) The utility model is provided with a supporting base plate, a mounting column, a unit column and a storage tray. During assembly and installation, a mounting column is fixedly installed at the center of the top surface of the supporting base plate, and threaded holes are provided at the center of the top surfaces of the mounting column and a plurality of unit columns. A threaded column is fixedly installed at the center of the bottom surface of each unit column. By screwing the threaded column into the threaded hole, a plurality of unit columns can be fixedly installed on the supporting base plate and the mounting column, so that a relative display rack can be assembled according to the number of types of organic glass samples displayed and sold. A rotating sleeve is sleeved on the outer side of the unit column, and a first limiting slip ring fixedly installed on the side wall of the unit column is embedded in a first limiting sliding groove provided on the inner wall of the rotating sleeve, so that the position of the storage tray containing the organic glass samples can be changed by rotating the rotating sleeve around the unit column. After adjusting the position of the storage tray, the staff can rotate the first fastening screw sleeved in the first nut, so that the first fastening screw drives the first anti-slip abutment block located in the first blind groove to move until the first anti-slip abutment block abuts against the side wall of the unit column, thereby fixing the position of the rotating sleeve. A connecting sleeve is welded on one side of the rotating sleeve, and a connecting hole is provided in the connecting sleeve, and a connecting column welded on one side of the storage tray is inserted into the connecting hole, and a second limiting slip ring installed on the side wall of the connecting column is embedded in the second limiting sliding groove provided on the inner wall of the connecting hole, so that customers can adjust the angle of the storage tray according to the needs of the visit, so as to facilitate the viewing of the organic glass samples, so as to facilitate the sales display, a second blind groove is provided on one side of the connecting hole, and a second nut is fixedly installed on one side of the second blind groove, and a second fastening screw is sleeved on the inner thread of the second nut, and the user can drive the second anti-slip abutment block to move by rotating the second fastening screw until it abuts against the side wall of the connecting column, so that the adjusted storage tray angle can be limited and fixed, so that the customer can view the organic glass samples conveniently, and finally a placement frame is fixedly welded on the other side of the rotating sleeve, and an information board is inserted into the inner side of the placement frame, and the information board introduces the information of the organic glass samples placed in the corresponding storage tray, so as to facilitate customers to quickly understand the product information, and at the same time facilitate the staff to make sales introductions, which is more practical.

[0018] (2) The utility model is provided with a storage tray, a storage slot and a fixing clamp. When a worker needs to place an organic glass sample in the storage slot provided in the storage tray for display, the worker can first place the organic glass sample in the center of the storage slot, and then the worker can drive the bidirectional lead screw installed in the installation cavity to rotate by adjusting the knob. The installation cavity is symmetrically provided with movable plates, and the two movable plates are fixedly installed at one end of the lead screw sleeve with a bidirectional lead screw threadedly sleeved therein. In addition, a guide slide bar is fixedly installed at the other end of the movable plate, and the guide slide bar is sleeved in a guide slide bar fixedly installed at one side of the reserved slot, and a fixing clamp is fixedly connected to one end of the guide slide bar. Therefore, as the bidirectional lead screw rotates, the two movable plates can be driven to move relative to each other along the direction of the guide slide bar until the fixing clamp abuts against the side walls of the organic glass sample on both sides. The two fixing clamps can be used to complete the placement and fixing of organic glass samples of different sizes within a certain range for display and sale, and can ensure the stability of the organic glass samples during display, and will not fall out of the storage tray and be damaged, so the practicability is stronger. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of a display stand for selling organic glass according to an embodiment of the utility model;

[0021] Figure 2 It is a top view of a storage tray of a plexiglass sales display stand according to an embodiment of the utility model;

[0022] Figure 3 According to the embodiment of the utility model Figure 1 A magnified image of point A;

[0023] Figure 4 According to the embodiment of the utility model Figure 1 A magnified view of point B;

[0024] Figure 5 According to the embodiment of the utility model Figure 2 Enlarged view of point C;

[0025] Figure 6 The utility model is a three-dimensional diagram of a fixing clamp of a display stand for selling organic glass according to an embodiment of the utility model.

[0026] In the figure:

[0027] 1. Support base plate; 2. Storage tray; 3. Storage slot; 4. Fixing clamp; 5. Unit column; 6. Rotating sleeve; 7. Information plate; 8. Placement frame; 9. Mounting column; 10. Connecting sleeve; 11. Bidirectional lead screw; 12. First fastening screw; 13. Threaded column; 14. Threaded hole; 15. First limit slide groove; 16. First limit slip ring; 17. First nut; 18. First blind groove; 19. First anti-slip abutment block; 20. Connecting column; 21. Connecting hole; 22. Second limit slide groove; 23. Second limit slip ring; 24. Second fastening screw; 25. Second nut; 26. Second blind groove; 27. Second anti-slip abutment block; 28. Mounting cavity; 29. ​​Movable plate; 30. Lead screw sleeve; 31. Adjustment knob; 32. Guide slide rod; 33. Guide slide sleeve; 34. Reserved groove. DETAILED DESCRIPTION

[0028] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0029] According to an embodiment of the utility model, a display stand for selling organic glass is provided.

[0030] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-6As shown, according to an embodiment of the utility model, a display stand for selling organic glass includes a supporting base plate 1, a unit column 5 and a storage tray 2. A mounting column 9 is fixedly installed at the center of the top surface of the supporting base plate 1. The mounting column 9 and the top surface of the unit column 5 are both provided with threaded holes 14 in the center. Threaded columns 13 are fixedly installed at the center of the bottom surfaces of several unit columns 5, and the threaded columns 13 are screwed into the threaded holes 14. A rotating sleeve 6 is sleeved on the outer side of the unit column 5, and a connecting sleeve 10 is welded on one side of the rotating sleeve 6, and a connecting hole 21 is provided in the center of the connecting sleeve 10. A connecting column 20 is fixedly welded on one side of the storage tray 2, and the connecting column 20 is inserted into the connecting hole 21. A storage groove 3 is provided in the center of the storage tray 2, and reserved grooves 34 are symmetrically provided on the side walls on both sides of the storage groove 3, and a guide sleeve 33 is fixedly installed on the side wall on one side of the reserved groove 34. An installation cavity 28 is opened on one side of the tray 2, and a bidirectional lead screw 11 is installed on one side of the installation cavity 28, and an adjusting knob 31 is fixedly installed on one end of the bidirectional lead screw 11, and movable plates 29 are symmetrically arranged in the installation cavity 28, and screw sleeves 30 are symmetrically fixedly installed on one end of the two movable plates 29, and the bidirectional lead screw 11 is sleeved on the inner thread of the screw sleeve 30, and guide slide rods 32 are symmetrically welded on the other ends of the two movable plates 29, and the guide slide rods 32 are sleeved in the guide slide sleeves 33, and the guide slide rods 32 are located in the reserved groove 34. One end of the fixed clip 4 can be used to complete the placement and fixation of plexiglass samples of different specifications and sizes within a certain range for display and sale, and the stability of the plexiglass samples during display can be guaranteed, and they will not fall out of the placement tray 2 and be damaged, so they are more practical.

[0031] In one embodiment, a first limiting slip ring 16 is fixedly installed on the side wall of the unit column 5, a first limiting slide groove 15 is opened on the inner wall of the rotating sleeve 6, and the first limiting slide ring 16 is embedded in the first limiting slide groove 15, a first blind groove 18 is opened on one side of the inner wall of the rotating sleeve 6, and a first nut 17 is fixedly installed on one side of the first blind groove 18, and the first nut 17 is threadedly sleeved with a first fastening screw 12, and the first fastening screw 12 is located at one end of the inner cavity of the first blind groove 18 and is connected to a first anti-slip abutment block 19, so that the position of the placement tray 2 containing the plexiglass sample can be changed by rotating the rotating sleeve 6 around the unit column 5.

[0032] In one embodiment, a second limiting slip ring 23 is fixedly installed on the side wall of the connecting column 20, a second limiting slide groove 22 is opened on the inner wall of the connecting sleeve 10, and the second limiting slide ring 23 is embedded in the second limiting slide groove 22, a second blind groove 26 is opened on one side of the inner wall of the connecting sleeve 10, and a second nut 25 is fixedly installed on one side of the second blind groove 26, and the second nut 25 is threadedly sleeved with a second fastening screw 24, and the second fastening screw 24 is located at one end of the inner cavity of the second blind groove 26 and is connected to a second anti-slip abutment block 27, so that customers can adjust the angle of the storage tray 2 according to their visiting needs, so as to facilitate the viewing of plexiglass samples and make it more convenient for sales display.

[0033] In one embodiment, a placement frame 8 is fixedly welded to the outer wall of the rotating sleeve 6, and an information plate 7 is inserted into the placement frame 8, so that the information plate 7 introduces the information of the plexiglass sample placed in the corresponding placement tray 2, so that customers can quickly understand the product information, and it is also convenient for staff to make sales introductions, which is more practical.

[0034] In one embodiment, the central axes of the supporting base plate 1, the mounting column 9, the unit column 5 and the rotating sleeve 6 are on the same straight line.

[0035] In one embodiment, the cross-section of the mounting cavity 28 is a concave shape.

[0036] In one embodiment, the cross-section of the placement frame 8 is a concave shape.

[0037] Working principle: The utility model is provided with a supporting base plate 1, a mounting column 9, a unit column 5 and a storage tray 2. During assembly and installation, a mounting column 9 is fixedly installed at the center of the top surface of the supporting base plate 1, and a threaded hole 14 is opened in the center of the top surface of the mounting column 9 and a plurality of unit columns 5. A threaded column 13 is fixedly installed at the center of the bottom surface of each unit column 5. By screwing the threaded column 13 into the threaded hole 14, a plurality of unit columns 5 can be fixedly installed on the supporting base plate 1 and the mounting column 9, so that relative display racks can be assembled according to the number of types of plexiglass samples displayed and sold. A rotating sleeve 6 is sleeved on the outer side of the unit column 5, and a first limiting slip ring 16 fixedly installed on the side wall of the unit column 5 is embedded in a first limiting slide groove 15 opened on the inner wall of the rotating sleeve 6, so that The position of the storage tray 2 containing the organic glass sample is changed by rotating the rotating sleeve 6 around the unit column 5. After adjusting the position of the storage tray 2, the staff can rotate the first fastening screw 12 that is threadedly sleeved in the first nut 17, so that the first fastening screw 12 drives the first anti-skid abutment block 19 located in the first blind groove 18 to move until the first anti-skid abutment block 19 abuts against the side wall of the unit column 5, thereby fixing the position of the rotating sleeve 6. A connecting sleeve 10 is welded on one side of the rotating sleeve 6, and a connecting hole 21 is opened in the connecting sleeve 10, and a connecting column 20 welded on one side of the storage tray 2 is inserted into the connecting hole 21, and a second limiting slip ring 23 installed on the side wall of the connecting column 20 is embedded in the second limit slip ring 23 opened on the inner wall of the connecting hole 21. The limiting slide groove 22 is provided in the positioning groove 22, so the customer can adjust the angle of the storage tray 2 according to the needs of the visit, so as to facilitate the viewing of the organic glass samples and to facilitate the sales display. A second blind groove 26 is provided on one side of the connecting hole 21, and a second nut 25 is fixedly installed on one side of the second blind groove 26, and a second fastening screw 24 is sleeved on the inner thread of the second nut 25. The user can drive the second anti-slip abutment block 27 to move by rotating the second fastening screw 24 until it abuts against the side wall of the connecting column 20, so that the adjusted storage tray 2 angle can be limited and fixed, which is convenient for customers to view the organic glass samples. Finally, a placement frame 8 is fixedly welded on the other side of the rotating sleeve 6, and an information plate 7 is inserted into the inner side of the placement frame 8. The information plate 7 introduces the corresponding placement The plexiglass sample information placed in the tray 2 is convenient for customers to quickly understand the product information, and it is convenient for the staff to make sales introductions, which is more practical. In addition, the utility model is provided with a storage tray 2, a storage slot 3 and a fixing clamp 4. When the worker needs to place the plexiglass sample in the storage slot 3 opened in the storage tray 2 for display, the worker can first place the plexiglass sample in the center of the storage slot 3, and then the worker can drive the two-way lead screw 11 installed in the installation cavity 28 to rotate by adjusting the knob 31. The installation cavity 28 is symmetrically installed with movable plates 29, and the two movable plates 29 are fixedly installed at one end of the lead screw sleeve 30 with the two-way lead screw 11 internally threaded. In addition, the other end of the movable plate 29 is fixedly installed with a guide slide rod 32.The guide slide bar 32 is sleeved in the guide slide sleeve 33 fixedly installed on one side of the reserved groove 34, and one end of the guide slide bar 32 is fixedly connected with a fixing clamp 4, so as the two-way lead screw 11 rotates, the two movable plates 29 can be driven to move relative to each other along the direction of the guide slide bar 32 until the fixing clamp 4 abuts against the side walls of the organic glass sample. The two fixing clamps 4 can be used to place and fix organic glass samples of different sizes within a certain range for display and sales, and can ensure the stability of the organic glass samples during display, so that they will not fall out of the storage tray 2 and be damaged, and the practicality is stronger.

[0038] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A display stand for selling organic glass, comprising a supporting base plate (1), a unit column (5) and a storage tray (2), characterized in that: A mounting column (9) is fixedly mounted at the center of the top surface of the support base plate (1), and threaded holes (14) are provided at the center of the top surfaces of the mounting column (9) and the unit column (5). Threaded columns (13) are fixedly mounted at the center of the bottom surfaces of a plurality of the unit columns (5), and the threaded columns (13) are screwed into the threaded holes (14). A rotating sleeve (6) is sleeved on the outer side of the unit column (5), and a connecting sleeve (10) is welded on one side of the rotating sleeve (6), and a connecting hole (21) is provided at the center of the connecting sleeve (10). A connecting column (20) is fixedly welded on one side of the storage tray (2), and the connecting column (20) is inserted into the connecting hole (21). A storage groove (3) is provided at the center of the storage tray (2), and reserved grooves (34) are symmetrically provided on the side walls of both sides of the storage groove (3). , and a guide sleeve (33) is fixedly installed on a side wall of one side of the reserved groove (34); a mounting cavity (28) is opened on one side of the storage tray (2); a bidirectional lead screw (11) is installed on one side of the mounting cavity (28); and an adjusting knob (31) is fixedly installed on one end of the bidirectional lead screw (11); movable plates (29) are symmetrically arranged in the mounting cavity (28); a lead screw sleeve (30) is symmetrically fixedly installed on one end of the two movable plates (29); and the bidirectional lead screw (11) is sleeved on the inner thread of the lead screw sleeve (30); guide slide rods (32) are symmetrically welded on the other end of the two movable plates (29); the guide slide rods (32) are sleeved in the guide sleeve (33); and a fixing clamp (4) is fixedly installed on one end of the guide slide rod (32) located in the reserved groove (34).

2. The organic glass sales display stand according to claim 1, characterized in that: A first limiting sliding ring (16) is fixedly installed on the side wall of the unit column (5), a first limiting sliding groove (15) is provided on the inner wall of the rotating sleeve (6), and a first limiting sliding ring (16) is embedded in the first limiting sliding groove (15), a first blind groove (18) is provided on one side of the inner wall of the rotating sleeve (6), and a first nut (17) is fixedly installed on one side of the first blind groove (18), and a first fastening screw (12) is sleeved on the inner thread of the first nut (17), and a first anti-slip abutment block (19) is connected and installed at one end of the first fastening screw (12) located in the inner cavity of the first blind groove (18).

3. The organic glass sales display stand according to claim 1, characterized in that: A second limiting sliding ring (23) is fixedly installed on the side wall of the connecting column (20), a second limiting sliding groove (22) is provided on the inner wall of the connecting sleeve (10), and a second limiting sliding ring (23) is embedded in the second limiting sliding groove (22), a second blind groove (26) is provided on one side of the inner wall of the connecting sleeve (10), and a second nut (25) is fixedly installed on one side of the second blind groove (26), and a second fastening screw (24) is sleeved on the inner thread of the second nut (25), and a second anti-slip abutment block (27) is connected and installed at one end of the second fastening screw (24) located in the inner cavity of the second blind groove (26).

4. The organic glass sales display stand according to claim 1, characterized in that: A placement frame (8) is fixedly welded to the outer wall of the rotating sleeve (6), and an information plate (7) is inserted into the placement frame (8).

5. The organic glass sales display stand according to claim 1, characterized in that: The central axes of the supporting base plate (1), the mounting column (9), the unit column (5) and the rotating sleeve (6) are on the same straight line.

6. The organic glass sales display stand according to claim 1, characterized in that: The cross-sectional shape of the installation cavity (28) is a concave shape.

7. The organic glass sales display stand according to claim 4, characterized in that: The cross-sectional shape of the placement frame (8) is a concave shape.

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