Convenient sleeve turnover storage device

By designing a split storage rack and an adjustable strut limit seat, the problem of poor sleeve storage stability is solved, the sleeve is stable and neatly stored, and the storage stability and space utilization are improved.

CN222137690UActive Publication Date: 2024-12-10HENAN YIRUI NEW MATERIAL TECH CO LTD
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Patent Information

Application Number
CN202420960007.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-07
Publication Date
2024-12-10
Estimated Expiration
2034-05-07

AI Technical Summary

Technical Problem

During the processing of aluminum products, the stacking storage of sleeves has problems such as poor stability, storage disorder and easy collapse. Especially, sleeves of different specifications are difficult to store independently, resulting in unstable storage and incorrect specifications.

Method used

A convenient sleeve turnover storage device is designed, adopting a split storage rack structure, including vertical frames, struts and limit seats. The adjustable struts and limit seats are used to adapt to different sizes of sleeves to ensure that each The sleeves have independent placement space and increase the connection strength between the frames through connecting rods.

Benefits of technology

The sleeve is stable and neatly stored, which improves storage stability and space utilization, avoids contact and chaos between sleeves, and enhances the convenience of lifting.

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Abstract

The utility model relates to a convenient sleeve turnover storage device which comprises at least one group of storage racks, each group of storage racks comprises a plurality of vertical frames, supporting rods and limiting seats, the vertical frames are arranged side by side at intervals in the left-right direction, a plurality of layers of supporting rods are detachably arranged between every two adjacent vertical frames, and the multiple layers of supporting rods are arranged at intervals in the height direction of the vertical frames. Each layer of supporting rods are arranged at any position in the height direction of the vertical frame; the number of the supporting rods on each layer is two, the two supporting rods are located on the same horizontal plane, each supporting rod is provided with at least one set of limiting bases, the number of the limiting bases in each set is two, each limiting base is adjustably arranged on the corresponding supporting rod, and the limiting bases slide in the length direction of the supporting rods. The limiting seats on the supporting rods on the same layer are matched to limit the sleeves to move left and right, and the sleeves are placed on the supporting rods. Multi-layer storage of the sleeves can be achieved, the number of the stored sleeves is large, the sleeves are not disordered, field management is facilitated, meanwhile, the sleeves are flexible in turnover and can be directly lifted out according to requirements, and the traditional reverse searching process is avoided.
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Description

Technical Field

[0001] The utility model relates to the technical field of sleeves for aluminum product processing, in particular to a convenient sleeve turnover and storage device. Background Technique

[0002] In the aluminum product processing industry such as aluminum plates, aluminum strips or aluminum foils, various sleeves are repeatedly used during the turnover in the hot rolling production line workshop, cold rolling production line workshop and finishing production line workshop of aluminum alloy, such as aluminum sleeves, casting sleeves, steel sleeves and paper sleeves, etc.

[0003] Sleeves are needed in the coiling of aluminum products. The sleeve can be regarded as the core cylinder of the aluminum coil. The above-mentioned sleeves have various specifications and large numbers. When storing, they are mostly stacked on the storage seat. The structure of the storage seat here is simple and is a frame body with a "U" - shaped cross - section, as Figure 1 shown.

[0004] Sleeves of the same specification are stacked on the same storage seat, which requires a large number of storage seats; the sleeves are in contact with each other and cannot be relatively independent. When hoisting, it will affect other sleeves, and the sleeves at the bottom layer may roll left and right, resulting in problems such as chaotic storage and easy mistakes in sleeve specifications during turnover. Moreover, the overall stability of the stacking form is relatively low, and there is a risk of collapse.

[0005] Patent publication number CN220762600U discloses a sleeve storage rack, whose cross - section is also similar to a "U" - shaped. In order to make the sleeves relatively independent, a baffle is detachably arranged, and the baffle can be used to separate the sleeves from each other and can also separate sleeves of different sizes. However, it can only store one layer of sleeves, and the storage quantity is limited. Summary of the Invention

[0006] In order to solve the problems of poor stability and chaotic storage of sleeves placed in the form of stacking on a conventional storage seat, the utility model provides a convenient sleeve turnover and storage device. By setting a split - type storage rack, the structure of the storage rack can be adjusted, which can adapt to the storage of sleeves with different lengths and diameter specifications, and provides a relatively independent placement space for each sleeve, ensuring the neat storage of sleeves and improving the stability of sleeve storage.

[0007] To achieve the above - mentioned purpose, the technical solution adopted by the utility model is:

[0008] A convenient sleeve turnover storage device comprises at least one group of storage racks, the number of which is selected according to the specific sleeve length, one group of the storage racks comprises a vertical frame, a support rod and a limit seat, the number of the vertical frames is a plurality of vertical frames arranged in parallel with intervals on the left and right, and multiple layers of the support rods are detachably arranged between two adjacent vertical frames to form the main structure of the storage rack, the multiple layers of support rods are arranged at intervals along the height direction of the vertical frame, and each layer of support rods is arranged at any position in the height direction of the vertical frame, so as to adapt to the storage of sleeves of different sizes;

[0009] There are two support rods on each layer located in the same horizontal plane, which ensures stable support for the sleeve. Each support rod is provided with at least one group of limit seats, and each group of limit seats is symmetrically arranged with two, which can form left and right limits to facilitate fixing the storage position of the sleeve. Each limit seat is adjustably arranged on the support rod, and the limit seat slides along the length direction of the support rod, which facilitates the adjustment of the distance between the two limit seats; the limit seats on the same layer of support rods cooperate to limit the left and right movement of the sleeve, and the sleeve is placed on the support rod.

[0010] Furthermore, the storage racks are provided in two groups spaced apart from each other, so as to facilitate full-length support of the sleeve. The two groups of storage racks are detachably connected by a plurality of connecting rods, which are spaced apart and arranged in parallel on the left and right sides, thereby improving the connection strength of the two storage racks.

[0011] Furthermore, the vertical frame is arranged vertically, and each vertical frame includes two columns arranged symmetrically in the front and back and a reinforcement rod for connecting the two columns. The number of the reinforcement rods is multiple, and the multiple reinforcement rods are arranged in sequence on the vertical frame up and down. The two ends of the reinforcement rod are respectively connected to the two column bolts, which facilitates the connection of the two columns and increases the structural strength of the frame.

[0012] Furthermore, both left and right sides of the outer surface of the column are provided with mounting holes to provide a basis for the adjustable mounting of the support rod, and the mounting holes include a plurality of mounting outer circular holes and mounting outer square holes alternately arranged up and down along the height direction of the column;

[0013] A support rod is arranged between two corresponding columns on the left and right of two adjacent vertical frames. The support rod includes a main section and a mounting section. The mounting sections are symmetrically arranged at both ends of the main section. The mounting sections are plates with a "𠃊"-shaped cross section. The mounting sections fit the two adjacent side surfaces of the columns, thereby increasing the contact area between the support rod and the vertical frame.

[0014] The mounting section is provided with an oblique clamping block, which is clamped in any one of the mounting outer square holes to facilitate the limiting of the support rod. The mounting section is also provided with an outer mounting bolt, which is inserted into any one of the mounting outer circular holes to prevent the support rod from falling off.

[0015] Furthermore, the side surfaces on the left and right sides of the column are also provided with mounting side holes, and the mounting side holes and the mounting outer holes are arranged on the adjacent two side surfaces of the column;

[0016] The number of the mounting side holes is a plurality of holes arranged at intervals along the height direction of the column, and the mounting side holes are circular holes. The mounting section is also provided with mounting side bolts, and the mounting side bolts are inserted into any of the mounting side holes, thereby increasing the reliability of the support rod installation.

[0017] Furthermore, the main body section is a square steel structure, and a plurality of adjustment holes are provided on the upper surface of the main body section, providing a basis for the adjustable installation of the limit seat;

[0018] The limit seat includes a sliding plate with a "ㄇ"-shaped cross-section, a limit plate and an adjusting bolt. The sliding plate is clamped on the main section and moves along the main section. Adjusting bolts and limit plates are respectively provided at both ends of the sliding plate. The adjusting bolt is inserted into any one of the adjusting holes to facilitate locking of the limit seat. The limit plate is arranged vertically, and the limit plate is a triangular plate. A stabilizing plate is provided on the edge of the limit plate. The cross-section of the stabilizing plate and the limit plate is "T"-shaped after being connected and combined, which improves the stability of the contact between the limit seat and the sleeve.

[0019] Through the above technical solution, the beneficial effects of the utility model are:

[0020] The utility model has a reasonable structural design and adopts two groups of storage racks. The two groups of storage racks are connected and fixed together by connecting rods, which can ensure the structural strength of the connection between the two groups of storage racks. The storage racks are used to carry the sleeves, ensuring that each sleeve can be arranged in a relatively independent space. The multi-layer support rods can achieve multi-layer combination, which is convenient for carrying a certain number of sleeves. Multiple support rods on the same layer work together to facilitate the support of the sleeves, improve the stability of the placement of the sleeves, and the installation position of the support rods on the vertical frame is adjustable, which is convenient for adapting to sleeves of different sizes, reducing the occupied space and improving the space utilization. At the same time, the position of the limit seat on the support rod is also adjustable, which is convenient for limiting sleeves of different sizes and preventing the sleeves from moving on the support rods. It can increase the neatness of the sleeve storage and ensure the stable and reliable state of the sleeve storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of an existing storage seat.

[0022] Figure 2 It is a top view of a convenient sleeve turnover storage device of the utility model, with a sleeve in the figure.

[0023] Figure 3 The utility model is a convenient sleeve turnover storage device Figure 2 Schematic diagram of the connection node between the storage rack and the connecting rod at A in the middle.

[0024] Figure 4 The utility model is a convenient sleeve turnover storage device Figure 3 Schematic diagram of the separation of the middle storage rack and the connecting rod.

[0025] Figure 5 This is a front view of a convenient sleeve turnover storage device of the utility model, with a sleeve in the figure.

[0026] Figure 6 The utility model is a convenient sleeve turnover storage device Figure 5 Schematic diagram of the connection node between the frame and the support rod at B in the middle.

[0027] Figure 7 It is a top view of the end of a support rod of a convenient sleeve turnover storage device of the utility model.

[0028] Figure 8 It is a front view of a support rod of a convenient sleeve turnover storage device of the utility model.

[0029] Fig. 9 The utility model is a convenient sleeve turnover storage device Figure 8 Cross-sectional view of the CC limit seat.

[0030] Fig.10 It is a side view of a convenient sleeve turnover storage device of the utility model, in which the sleeve is not shown.

[0031] The numbers in the accompanying drawings are: 1 storage rack, 2 connecting rod, 3 vertical frame, 31 column, 32 reinforcement rod, 4 support rod, 41 main section, 42 installation section, 5 limit seat, 51 sliding plate, 52 limit plate, 53 adjusting bolt, 6 connecting bolt, 7 installation outer hole, 71 installation outer circular hole, 72 installation outer square hole, 8 oblique clamp, 9 installation outer bolt, 10 installation side hole, 11 installation side bolt, 12 adjustment hole, 13 stabilizing plate, 14 storage seat. DETAILED DESCRIPTION

[0032] The specific implementation of the utility model is described in detail below with reference to the accompanying drawings:

[0033] like Figure 2~Figure 10 As shown, a convenient sleeve turnover storage device includes at least one group of storage racks 1. One group of storage racks 1 can store sleeves. However, since the sleeves are relatively long and the width of the storage racks 1 is relatively small, in order to avoid the two ends of the sleeves being suspended in the air, the storage racks 1 are provided in two groups arranged in a front-to-back interval. The two groups of storage racks 1 are used to support the sleeves to avoid the sleeves being suspended in the air.

[0034] In order to improve the integrity of the two storage racks 1, multiple connecting rods 2 are detachably provided between the two storage racks 1 to connect them, and the multiple connecting rods 2 are arranged side by side at intervals. Here, the ends of the connecting rods 2 and the storage racks 1 are connected by bolts, and the connecting rods 2 can be used to connect and fix the two storage racks 1 together.

[0035] In this embodiment, a set of storage racks 1 includes a vertical frame 3, a support rod 4 and a limit seat 5. The number of vertical frames 3 is a plurality of vertical frames 3 arranged in parallel with intervals on the left and right, and the number of vertical frames 3 is five here, and the spacing between two adjacent vertical frames 3 is equal. The vertical frames 3 are arranged vertically, and each vertical frame 3 includes two vertical columns 31 arranged symmetrically in front and back and a reinforcement rod 32 for connecting the two vertical columns 31. The vertical columns 31 are hollow "convex"-shaped columns, and the corresponding side walls of the two vertical columns 31 in the same vertical frame 3 are open to facilitate the insertion of the reinforcement rod 32.

[0036] There are multiple reinforcement rods 32, and five reinforcement rods 32 are used here. The five reinforcement rods 32 are arranged on the vertical frame 3 in sequence, that is, one vertical frame 3 is connected and fixed by five reinforcement rods 32, and the reinforcement rod 32 is a hollow rod body. The two reinforcement rods 32 located at the top and bottom are arranged horizontally, and the three reinforcement rods 32 located in the middle are arranged obliquely.

[0037] When the reinforcing rod 32 is installed, the two ends of the reinforcing rod 32 are respectively bolted to the two columns 31. Specifically, the ends of two adjacent reinforcing rods 32 are arranged overlappingly, and the overlapping parts are inserted into the openings of the side walls of the columns 31. The ends of the two reinforcing rods 32 and the columns 31 can be connected and fixed by connecting bolts 6, thereby forming a stable structure of the frame 3.

[0038] In order to achieve the connection and fixation between multiple vertical frames 3, multiple layers of support rods 4 are detachably arranged between two adjacent vertical frames 3, and the number of support rods 4 is three layers. The three layers of support rods 4 are arranged at intervals along the height direction of the vertical frames 3 to ensure the reliability of the connection between two adjacent vertical frames 3. Each layer of support rods 4 is arranged at any position in the height direction of the vertical frames 3, and the number of support rods 4 in each layer is two located on the same horizontal plane. Therefore, the position of the support rod 4 on the vertical frame 3 is adjustable, and the installation position of the support rod 4 can be flexibly adjusted according to the diameter of the sleeve.

[0039] Since the installation position of the support rod 4 on the vertical frame 3 is adjustable, in order to facilitate the installation of the support rod 4, a hole must first be drilled on the vertical frame 3. Specifically, installation external holes 7 are drilled on both left and right sides of the outer surface of the column 31, and the installation external holes 7 include a plurality of installation external circular holes 71 and installation external square holes 72 that are alternately arranged up and down, and the installation external circular holes 71 and the installation external square holes 72 are alternately arranged up and down along the height direction of the column 31.

[0040] A support rod 4 is arranged between two corresponding columns 31 on the left and right of two adjacent frames 3. The support rod 4 includes a main section 41 and a mounting section 42. The main section 41 is a square steel structure. The mounting sections 42 are symmetrically arranged at both ends of the main section 41. The mounting section 42 is a plate with a "𠃊"-shaped cross-section. The mounting section 42 fits the two adjacent side surfaces of the column 31.

[0041] The support rod 4 is connected and fixed by the mounting sections 42 at both ends and the two columns 31 on the vertical frame 3. Specifically, two oblique clamping blocks 8 are provided on the mounting sections 42, and the oblique clamping blocks 8 are arranged obliquely downward and have a certain angle with the side wall of the column 31. The oblique clamping blocks 8 are clamped in any one of the mounting outer square holes 72 to limit the downward movement of the support rod 4. At this time, the support rod 4 can only move upward and cannot move downward.

[0042] In order to ensure the tightness of the connection between the oblique clamping block 8 and the mounting outer square hole 72, an mounting outer bolt 9 is also provided on the mounting section 42. There are two mounting outer bolts 9. The mounting outer bolts 9 and the oblique clamping block 8 are arranged alternately up and down. The mounting outer bolt 9 is inserted into any one of the mounting outer circular holes 71 to prevent the support rod 4 from falling off.

[0043] On the basis that the support rod 4 is clamped with the column 31 by the oblique clamping block 8 and is threadedly connected with the column 31 by the mounting external bolt 9, in order to improve the mounting strength of the support rod 4, mounting side holes 10 are also opened on the side surfaces on both sides of the column 31. The mounting side holes 10 and the mounting external hole 7 are arranged on the adjacent two side surfaces of the column 31, and the mounting side holes 10 and the mounting external hole 7 are axially perpendicular. The number of the mounting side holes 10 is a plurality of mounting side holes 10 arranged at intervals along the height direction of the column 31, and the mounting side holes 10 are circular holes. The mounting section 42 is also provided with a mounting side bolt 11, and the mounting side bolt 11 is inserted into any mounting side hole 10.

[0044] As described above, the support rod 4 is connected to the column 31 by using the mounting outer bolts 9 and the mounting side bolts 11, and is connected by using the oblique clamping block 8 and the mounting outer square hole 72, thereby ensuring the structural strength of the installation of the support rod 4, avoiding deformation and damage of the connection node between the support rod 4 and the column 31, and being able to effectively bear the sleeve.

[0045] The support rod 4 is used to carry the sleeve, that is, the sleeve is placed on the support rod 4, and the sleeve is in direct contact with the support rod 4. In order to limit the sleeve on the support rod 4, each support rod 4 is provided with at least one group of limit seats 5. When the number of limit seats 5 is one group, it means that the diameter of the sleeve is larger. If the number of limit seats 5 is more, it means that the diameter of the sleeve is smaller, and the support rod 4 can carry multiple sleeves.

[0046] A group of limit seats 5 is composed of two symmetrically arranged seats, each of which is adjustably arranged on the support rod 4, that is, the limit seat 5 can slide along the length direction of the support rod 4, and the limit seat 5 can be installed at any position in the length direction of the support rod 4. The two limit seats 5 on the same layer of support rods 4 cooperate with the limiting sleeve to move left and right.

[0047] In order to achieve adjustable installation of the limit seat 5, a plurality of adjustment holes 12 arranged in a straight line are provided on the upper surface of the main section 41. The limit seat 5 includes a sliding plate 51 with a "ㄇ"-shaped cross section, a limit plate 52 and an adjustment bolt 53. The sliding plate 51 is clamped on the main section 41 and moves along the main section 41 to prevent the limit seat 5 from rotating horizontally. The two ends of the sliding plate 51 are respectively provided with an adjustment bolt 53 and a limit plate 52. The adjustment bolt 53 is inserted into any one of the adjustment holes 12 to fix the position of the limit seat 5.

[0048] The limiting plate 52 is used to abut against the side wall of the sleeve to prevent it from moving. The limiting plate 52 is arranged vertically and is a triangular plate. A stabilizing plate 13 is provided on the edge of the limiting plate 52. The stabilizing plate 13 is bent into a "∧" shape. After the stabilizing plate 13 and the limiting plate 52 are connected and combined, the cross-section is in a "T" shape, which can increase the contact area between the limiting plate 52 and the sleeve and can effectively limit the sleeve.

[0049] The principle of the utility model is as follows: first assemble a group of storage racks 1, step 1, arrange two columns 31 symmetrically, use five reinforcing rods 32 to connect and fix the two columns 31, and complete the assembly of a vertical frame 3; step 2, repeat step 1, complete the assembly of five vertical frames 3, and then arrange the five vertical frames 3 at intervals, and use six support rods 4 to connect and fix two adjacent vertical frames 3, and finally install the limit seat 5 on the support rod 4 to complete the assembly of a group of storage racks 1. Step 3, repeat steps 1-2 to complete the assembly of another group of storage racks 1, and then connect and fix the two groups of storage racks 1 through the connecting rod 2.

[0050] During the assembly of the two sets of storage racks 1, the spacing between the multi-layer support rods 4 between two adjacent vertical frames 3 can be adjusted, and the number of the upper and lower limit seats 5 on the support rods 4 can also be adjusted to accommodate sleeves of different sizes and specifications. For example, if the sleeve has a large diameter, a group of limit seats 5 can be arranged on the support rods 4, and the spacing between the two limit seats 5 in one group can be increased, while increasing the spacing between the upper and lower adjacent layers of support rods 4, so as to accommodate the storage of large-diameter sleeves.

[0051] The storage rack 1 of the utility model has high structural strength and is not easy to collapse. The sleeves can be neatly placed on the storage rack 1, avoiding the conventional storage chaos and improving the space utilization of the vehicle. The sleeves are carried by the support rods 4 and limited by the limit seats 5, which can ensure the independence and stability of the sleeve storage, avoid contact between the sleeves, and improve the convenience of hoisting.

[0052] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structures, features and principles described in the patent scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A convenient sleeve turnover storage device, characterized in that: It comprises at least one group of storage racks (1), wherein one group of the storage racks (1) comprises a vertical frame (3), a support rod (4) and a limit seat (5), wherein the vertical frames (3) are arranged in parallel with each other at intervals on the left and right, and multiple layers of the support rods (4) are detachably arranged between two adjacent vertical frames (3), wherein the multiple layers of the support rods (4) are arranged at intervals along the height direction of the vertical frames (3), and each layer of the support rods (4) is arranged at any position in the height direction of the vertical frames (3); The number of support rods (4) on each layer is two and located on the same horizontal plane. Each support rod (4) is provided with at least one group of limit seats (5). The number of each group of limit seats (5) is two and arranged symmetrically. Each limit seat (5) is adjustably arranged on the support rod (4). The limit seat (5) slides along the length direction of the support rod (4). The limit seats (5) on the support rods (4) on the same layer cooperate with the limiting sleeve to move left and right. The sleeve is placed on the support rod (4).

2. A convenient sleeve turnover storage device according to claim 1, characterized in that: The storage racks (1) are provided in two groups arranged at intervals in front and back, and a plurality of connecting rods (2) are detachably provided between the two groups of storage racks (1) for connection, and the plurality of connecting rods (2) are arranged in parallel at intervals in the left and right.

3. A convenient sleeve turnover storage device according to claim 1, characterized in that: The vertical frames (3) are arranged vertically, and each vertical frame (3) comprises two vertical columns (31) arranged symmetrically in front and back, and a reinforcing rod (32) for connecting the two vertical columns (31). The number of the reinforcing rods (32) is multiple, and the multiple reinforcing rods (32) are arranged on the vertical frame (3) in sequence from top to bottom, and the two ends of the reinforcing rod (32) are respectively connected to the two vertical columns (31) by bolts.

4. A convenient sleeve turnover storage device according to claim 3, characterized in that: The outer surface of the column (31) is provided with mounting external holes (7) on both left and right sides, and the mounting external holes (7) include a plurality of mounting external circular holes (71) and mounting external square holes (72) arranged alternately up and down along the height direction of the column (31); A support rod (4) is arranged between two corresponding left and right columns (31) on two adjacent upright frames (3), the support rod (4) comprising a main section (41) and a mounting section (42), the mounting sections (42) being symmetrically arranged at both ends of the main section (41), the mounting sections (42) being a plate body with a "𠃊"-shaped cross section, and the mounting sections (42) being in contact with two adjacent side surfaces of the columns (31); The mounting section (42) is provided with an oblique clamping block (8), the oblique clamping block (8) being clamped into any one of the mounting outer square holes (72); the mounting section (42) is also provided with an mounting outer bolt (9), the mounting outer bolt (9) being inserted into any one of the mounting outer circular holes (71).

5. A convenient sleeve turnover storage device according to claim 4, characterized in that: The side surfaces on the left and right sides of the column (31) are also provided with mounting side holes (10), and the mounting side holes (10) and the mounting outer holes (7) are arranged on the adjacent two side surfaces of the column (31); The number of the mounting side holes (10) is a plurality and is arranged at intervals along the height direction of the column (31); the mounting side holes (10) are circular holes; the mounting section (42) is also provided with mounting side bolts (11); the mounting side bolts (11) are inserted into any one of the mounting side holes (10).

6. A convenient sleeve turnover storage device according to claim 4, characterized in that: The main body section (41) is a square steel structure, and a plurality of adjustment holes (12) are provided on the upper surface of the main body section (41); The limit seat (5) comprises a sliding plate (51) with a "ㄇ"-shaped cross section, a limit plate (52) and an adjusting bolt (53). The sliding plate (51) is clamped on the main section (41) and moves along the main section (41). The two ends of the sliding plate (51) are respectively provided with an adjusting bolt (53) and a limit plate (52). The adjusting bolt (53) is inserted into any one of the adjusting holes (12). The limit plate (52) is arranged vertically. The limit plate (52) is a triangular plate. A stabilizing plate (13) is provided on the edge of the limit plate (52). After the stabilizing plate (13) and the limit plate (52) are connected and assembled, the cross section is in a "T" shape.