Multifunctional pattern sewing machine template and pattern sewing machine

Abstract

The utility model provides a multifunctional pattern-sewing machine template and a pattern-sewing machine. The multifunctional pattern-sewing machine template comprises a mounting frame, a plurality of bottom plates and an upper plate capable of ascending and descending, a mounting part connected with a pattern sewing machine is formed on one side of the mounting frame, and an embedding groove is formed in the mounting frame; one of the plurality of bottom plates is selected to be embedded and matched with the embedding groove, and a positioning part for placing cloth is formed on each bottom plate; the upper plate is parallel to the plate surface of the corresponding bottom plate, a plurality of positioning holes are formed in the upper plate, the shapes of the positioning holes are different, the depth of each positioning hole is not smaller than the thickness of a badge, and a connecting part connected with a pattern sewing machine is arranged on the side edge of the upper plate. According to the multifunctional pattern sewing machine template, multiple types of badges can be sewn on the same upper plate, the functionality and practicability of the template are improved, the upper plate can be lifted up and down, workers do not need to manually open the cover plate, and operation steps are reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of pattern machine templates, specifically relating to a multifunctional pattern machine template and a pattern machine. Background Technology

[0002] Military uniforms are made by sewing shoulder boards, collar insignia, armbands, and identification strips in specific locations. The production process uses pattern making machines with templates. Different templates are used for different badges, and the feed program of the templates is adjusted to complete the sewing of different badges.

[0003] Currently, existing pattern sewing machines consist of a base plate and a flip-up cover plate. To use them, the fabric is placed on the base plate, the cover plate is closed, and the badge is placed on the opening in the cover plate for sewing. After sewing, the cover plate is opened to change the fabric. This requires frequent manual opening of the cover plate, which is time-consuming. Pattern sewing machines typically only have one pattern; different patterns need to be manually changed when sewing different badges. This pattern changing operation is cumbersome, and repeated pattern changes waste time, affecting the production efficiency of military uniforms. To ensure timely production of military uniforms, additional equipment is usually added, with each piece of equipment equipped with different types of pattern sewing machine templates, increasing production costs. Utility Model Content

[0004] This utility model provides a multifunctional pattern machine template and pattern machine, aiming to solve the technical problem that the pattern machine template in the prior art needs to be repeatedly opened and closed manually, resulting in low template replacement efficiency.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] Firstly, a multi-functional pattern machine template is provided, including:

[0007] The mounting frame has a mounting part on one side that connects to the pattern machine, and an insert groove is formed inside the mounting frame.

[0008] Multiple base plates, one of which is fitted into the mounting groove, wherein each base plate has a positioning part for placing fabric, and the shape of the positioning part on each base plate is different; and

[0009] The upper plate is adjustable in height, and its surface is parallel to that of the corresponding base plate. The upper plate has multiple positioning holes with different shapes and a depth not less than the thickness of the badge. The side of the upper plate has a connecting part for connection with the pattern making machine.

[0010] In conjunction with the first aspect, in one possible implementation, the side of the base plate is provided with a positioning protrusion, and the side wall of the mounting groove is provided with a positioning groove corresponding to the positioning protrusion, the positioning groove engaging with the positioning protrusion.

[0011] In conjunction with the first aspect, in one possible implementation, the base plate is provided with contour marking lines, which form the positioning part.

[0012] In conjunction with the first aspect, in one possible implementation, the plurality of positioning holes are divided into two rows, and the plurality of positioning holes in each row are arranged at intervals along a preset path.

[0013] In conjunction with the first aspect, in one possible implementation, the upper plate includes an upper frame and an upper bonding plate, the upper bonding plate is embedded in the upper frame, the upper bonding plate has a plurality of positioning holes, and the bottom surface of the upper frame is flush with the bottom surface of the upper bonding plate.

[0014] In conjunction with the first aspect, in one possible implementation, the upper bonding plate is a transparent plate.

[0015] In conjunction with the first aspect, in one possible implementation, the upper frame is a ring structure, the upper bonding plate is a circular plate, and the plurality of positioning holes are arranged around the central axis of the upper bonding plate.

[0016] In conjunction with the first aspect, in one possible implementation, a slope that gradually slopes outward from bottom to top is formed above the positioning hole.

[0017] The multi-functional pattern sewing machine template provided by this utility model, compared with the prior art, has a base plate embedded in the mounting frame and multiple positioning holes with different shapes on the upper plate, allowing the same upper plate to sew multiple types of badges, increasing the functionality and practicality of the template. Employees can use one pattern sewing machine to sew different badges, reducing operating costs. The upper plate can be raised and lowered without the need for employees to manually lift the cover, shortening sewing preparation time and reducing operation steps. When sewing different badges and fabrics, different base plates can be changed and the corresponding positioning holes can be used for sewing, making the change operation simple and improving sewing efficiency.

[0018] Secondly, a pattern-making machine is provided, comprising:

[0019] The body of the pattern machine;

[0020] A movable component includes a movable part and a lifting part, wherein the movable part is slidably disposed on the body of the pattern making machine along a first horizontal direction, and the lifting part is disposed on top of the movable part; and

[0021] In any of the above possible implementations of the multi-functional pattern machine template, the mounting part of the mounting frame is connected to the moving part, and the upper plate of the multi-functional pattern machine template is connected to the lifting part.

[0022] In conjunction with the second aspect, in one possible implementation, the moving component includes:

[0023] A movable plate is slidably disposed on the body of the pattern machine along the first horizontal direction;

[0024] An expansion joint, fixed to the top of the movable plate, has a telescopic end on its side that extends and retracts along a second horizontal direction, the first horizontal direction being perpendicular to the second horizontal direction, and the telescopic end forming the movable part; and

[0025] The support arm includes a support section and a horizontal section. The support section is vertically arranged and connected to the telescopic end. The horizontal section is fixed to the top of the support section along the second horizontal direction. A lifter is provided at the end of the horizontal section away from the support section. The lifter forms the lifting part and is connected to the upper plate.

[0026] Compared with existing technologies, the pattern sewing machine provided by this utility model has a base plate embedded in a mounting frame, and multiple positioning holes of different shapes are opened on the upper plate. This allows the same upper plate to sew multiple types of badges, increasing the functionality and practicality of the template. Employees can use one pattern sewing machine to sew different badges, reducing operating costs. The upper plate can be raised and lowered, eliminating the need for employees to manually lift the cover, shortening sewing preparation time and reducing operation steps. When sewing different badges and fabrics, different base plates can be changed and the corresponding positioning holes can be used for sewing. The change operation is simple and improves sewing efficiency. One pattern sewing machine body can sew different types of badges, reducing operating costs and increasing the applicability of production. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a multifunctional pattern machine template provided in an embodiment of the present invention;

[0029] Figure 2 for Figure 1Exploded view of the assembly of the middle and bottom plates;

[0030] Figure 3 An assembly diagram of the base plate and mounting frame provided in one embodiment of the present utility model;

[0031] Figure 4 for Figure 1 Cross-sectional view from the perspective of the middle BB;

[0032] Figure 5 This is a schematic diagram of the structure of a pattern-making machine provided in another embodiment of the present invention;

[0033] Figure 6 for Figure 5 A magnified view of part A in the image.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Mounting frame; 11. Mounting part; 12. Positioning groove;

[0036] 2. Base plate; 21. Positioning protrusion; 22. Outline marking line;

[0037] 3. Upper plate; 31. Upper frame; 32. Upper bonding plate; 321. Positioning holes; 322. Bevel;

[0038] 4. Pattern making machine body;

[0039] 5. Moving component; 51. Moving plate; 52. Telescopic device; 53. Support arm; 54. Lifter. Detailed Implementation

[0040] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. The following description of at least one exemplary embodiment is actually illustrative only and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0042] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0043] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0044] It should be noted that the terms "length," "width," "height," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model. The directional terms "inner" and "outer" refer to the inside or outside relative to the outline of each component itself.

[0045] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "linking," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, and the spatial relative descriptions used herein will be interpreted accordingly.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Additionally, "multiple" and "several" mean two or more, unless otherwise explicitly specified.

[0048] Please refer to the following: Figures 1 to 6 The multifunctional pattern making machine template provided by this utility model will now be described. The multifunctional pattern making machine template includes a mounting frame 1, multiple base plates 2, and a vertically adjustable upper plate 3. A mounting part 11 for connecting to the pattern making machine is formed on one side of the mounting frame 1, and an insert groove is formed inside the mounting frame 1. One of the multiple base plates 2 is fitted into the insert groove, and a positioning part for placing fabric is formed on each base plate 2, with each positioning part having a different shape. The upper plate 3 is parallel to the corresponding base plate 2, and multiple positioning holes 321 are provided on the upper plate 3. The positioning holes 321 have different shapes, and their depth is not less than the thickness of the badge. A connecting part for connecting to the pattern making machine is provided on the side of the upper plate 3.

[0049] It should be noted that the upper plate 3 can be raised and lowered using a lifting device.

[0050] It should be noted that the stitching position of the badge and the fabric has precise requirements. The positioning unit can assist employees in placing the fabric in the preset position. After the badge is inserted into the corresponding positioning hole 321, it can be accurately aligned with the stitching position on the fabric, ensuring sewing quality. Each base plate 2 corresponds to a type of fabric.

[0051] In specific implementation, the principle of this embodiment is as follows: replace the corresponding base plate 2, place the fabric on the positioning part, the upper plate 3 descends and fits against the base plate 2, and place the badge through the positioning hole 321 for sewing; use the corresponding positioning hole 321 to sew the badge. When it is necessary to change the badge format, there is no need to change the template. Just select the corresponding positioning hole 321 and replace the base plate 2 separately. The base plate 2 is embedded in the mounting frame 1, which is convenient to disassemble and improves the replacement efficiency.

[0052] Compared with the prior art, the multi-functional pattern sewing machine template provided in this embodiment has a base plate 2 embedded in the mounting frame 1, and multiple positioning holes 321 with different shapes on the upper plate 3, so that the same upper plate 3 can sew multiple types of badges, which increases the functionality and practicality of the template. Employees can use one pattern sewing machine to sew different badges, reducing the cost of use. The upper plate 3 can be raised and lowered without the need for employees to manually lift the cover, shortening the preparation time for sewing and reducing the number of operation steps. When sewing different badges and fabrics, different base plates 2 can be replaced and the corresponding positioning holes 321 can be used for sewing. The replacement operation is simple and improves sewing efficiency.

[0053] In some embodiments, see Figure 2 and Figure 3 The base plate 2 has a positioning protrusion 21 on its side, and a positioning groove 12 is formed on the side wall of the mounting groove corresponding to the positioning protrusion 21. The positioning groove 12 engages with the positioning protrusion 21. The engagement of the positioning protrusion 21 and the positioning groove 12 can increase the connection stability between the base plate 2 and the mounting frame 1, and the positioning protrusion 21 and the positioning groove 12 can limit the horizontal relative movement between the base plate 2 and the mounting frame 1.

[0054] In some embodiments, see Figure 2 and Figure 3 The base plate 2 is provided with an outline marking line 22, which forms a positioning part. The shape of the outline marking line 22 is adapted to the shape of the fabric. The outline marking line 22 on each base plate 2 is different. By changing different base plates 2 and matching different positioning holes 321, various types of badges can be sewn, thus improving the applicability of the equipment.

[0055] In some embodiments, see Figure 1 and Figure 2 The multiple positioning holes 321 are arranged in two rows, and the multiple positioning holes 321 in each row are arranged at intervals along a preset path. The multiple positioning holes 321 are arranged in sequence, which makes it convenient to adjust and easy to align when sewing different badges, reducing the difficulty of adjustment.

[0056] In practice, the preset path is parallel to the long axis of the mounting frame 1. For example, six positioning holes 321 are set, and the multiple positioning holes 321 are divided into two rows, with three in each row and spaced apart, which facilitates the selection and movement of the positioning holes 321.

[0057] In some embodiments, see Figure 1 and Figure 2 The upper plate 3 includes an upper frame 31 and an upper bonding plate 32. The upper bonding plate 32 is embedded in the upper frame 31 and has multiple positioning holes 321. The bottom surface of the upper frame 31 is flush with the bottom surface of the upper bonding plate 32. The upper frame 31 serves as the outer shell and is connected to the lifting device on the pattern sewing machine to increase lifting stability. The upper bonding plate 32 is installed inside the upper frame 31 and has multiple positioning holes 321. The upper bonding plate 32 is replaceable. When it is necessary to sew a specific badge (which does not have a corresponding positioning hole 321 on the upper bonding plate 32), the upper bonding plate 32 can be replaced, increasing ease of use.

[0058] As a connection method between the upper frame 31 and the upper bonding plate 32, the upper frame 31 includes upper and lower plates, and the upper and lower plates clamp and fix the upper bonding plate 32.

[0059] As another way of connecting the upper frame 31 and the upper bonding plate 32, the bottom of the upper frame 31 is bonded to the upper bonding plate 32.

[0060] In some embodiments, the upper bonding plate 32 is a transparent plate. The transparent plate allows employees to clearly observe the contact position between the badge and the fabric, which helps to ensure sewing quality.

[0061] In practice, the upper bonding plate 32 can be made of acrylic or plastic, and the upper frame 31 is made of iron. The upper frame 31 has high structural strength to prevent deformation during use and to drive the upper bonding plate 32 to rise and fall stably.

[0062] In some embodiments, the upper frame 31 is an annular structure, the upper bonding plate 32 is a circular plate, and a plurality of positioning holes 321 are arranged around the central axis of the upper bonding plate 32. Alternatively, the upper bonding plate 32 is circular, allowing it to be rotated when changing the positioning holes 321, making replacement more convenient. In this embodiment, the upper bonding plate 32 and the upper frame 31 are rotatably connected.

[0063] In some embodiments, see Figure 4 Above the positioning hole 321, there is a slope 322 that gradually slopes outward from bottom to top. The slope 322 allows employees to quickly place the badge into the corresponding positioning hole 321, improving placement efficiency.

[0064] In practice, "outward" refers to the direction away from the center line of positioning hole 321.

[0065] Based on the same inventive concept, this application also provides a pattern-making machine, see reference. Figure 5 and Figure 6 The system includes a pattern making machine body 4, a moving component 5, and a multifunctional pattern making machine template as described in any of the above embodiments. The moving component 5 includes a moving part and a lifting part. The moving part is slidably disposed on the pattern making machine body 4 along a first horizontal direction, and the lifting part is disposed on the top of the moving part. In the multifunctional pattern making machine template, the mounting part 11 of the mounting frame 1 is connected to the moving part, and the upper plate 3 of the multifunctional pattern making machine template is connected to the lifting part.

[0066] It should be noted that the pattern making machine body 4 has a sewing machine with the sewing machine needle facing downwards and capable of being raised and lowered for sewing. The pattern making machine body 4 is an existing pattern making machine, which will not be described in detail here.

[0067] For specific implementation, please refer to Figure 5 Solid arrows indicate the first horizontal direction, and dashed arrows indicate the second horizontal direction. Figure 5 The dotted line on the body of the pattern-making machine represents the outer contour of the fabric.

[0068] In this specific implementation, the mounting part of the mounting frame 1 is a connecting plate, which is connected to the telescopic end; the connecting part of the upper plate 3 is a connecting hole, which is fixedly connected to the lifting part by bolts.

[0069] Compared with the prior art, the pattern sewing machine provided in this embodiment has a base plate 2 embedded in the mounting frame 1, and multiple positioning holes 321 are opened on the upper plate 3. The multiple positioning holes 321 have different shapes, so that the same upper plate 3 can sew multiple types of badges, which increases the functionality and practicality of the template. Employees can use one pattern sewing machine to sew different badges, reducing the cost of use. The upper plate 3 can be raised and lowered, eliminating the need for employees to manually lift the cover, shortening the preparation time for sewing and reducing the number of operation steps. When sewing different badges and fabrics, different base plates 2 can be replaced and the corresponding positioning holes 321 can be used for sewing. The replacement operation is simple and improves the sewing efficiency. One pattern sewing machine body can sew different types of badges, reducing the cost of use and increasing the applicability of production.

[0070] In some embodiments, see Figure 5 and Figure 6The movable component 5 includes a movable plate 51, a telescopic member 52, and a support arm 53. The movable plate 51 is slidably mounted on the pattern machine body 4 along a first horizontal direction; the telescopic member 52 is fixed to the top of the movable plate 51, and the side of the telescopic member 52 has a telescopic end that extends and retracts along a second horizontal direction, the first horizontal direction being perpendicular to the second horizontal direction, and the telescopic end forming a movable part; the support arm 53 includes a support section and a horizontal section, the support section being vertically arranged and connected to the telescopic end, the horizontal section being fixed to the top of the support section along the second horizontal direction, and a lifter 54 being provided at the end of the horizontal section away from the support section, the lifter 54 forming a lifting part, and the lifter 54 being connected to the upper plate 3.

[0071] In practical implementation, the expansion joint 52 can be equipped with a telescopic motor or a telescopic cylinder, as long as it can drive the support arm 53 to move along the second horizontal direction. A connecting plate is provided at the bottom of the expansion joint 52, and a connecting hole is provided on the upper plate 3. The connecting plate and the connecting hole are fixed by bolts to connect and fix the upper plate 3 and the expansion joint 52.

[0072] In practice, a telescopic cylinder is installed below the movable plate 51. The piston rod of the telescopic cylinder moves along the first horizontal direction, and the end of the piston rod is connected to the movable plate 51, driving the movable plate 51 to move back and forth.

[0073] In practice, the lifting device 54 can be a telescopic motor, as long as it can drive the upper plate 3 to move up and down.

[0074] As one embodiment of the lifting device 54, the lifting device 54 includes a swing arm and a lifting block. The lifting block is slidably disposed at the end of the support arm 53 and connected to the upper plate 3. One end of the swing arm is rotatably connected to the lifting block, and the other end is rotatably connected to the support arm 53. The lifting block is driven to move up and down by the swing of the swing arm.

[0075] The movable component 5 provided in this embodiment has a clear division of labor. The movable plate 51 slides in the first horizontal direction, and the support arm 53 moves in the second horizontal direction, causing the base plate 2 to move freely on the horizontal plane, facilitating sewing operations on the sewing needle on the pattern sewing machine body 51. The lifting device 54 slides up and down at the end of the support arm 53, causing the upper plate 3 to move, facilitating the clamping of the fabric. It can automatically clamp the fabric, and the upper plate 3 descends. The positioning hole 321 allows the badge to be quickly positioned, increasing the convenience of operation.

[0076] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multifunctional pattern machine template, characterized in that, include: The mounting frame has a mounting part on one side that connects to the pattern machine, and an insert groove is formed inside the mounting frame. Multiple base plates are selected to be fitted into the mounting groove. The base plates have positioning parts for placing fabric, and the positioning parts on each base plate have different shapes. as well as The upper plate is adjustable in height, and its surface is parallel to that of the corresponding base plate. The upper plate has multiple positioning holes with different shapes and a depth not less than the thickness of the badge. The side of the upper plate has a connecting part for connection with the pattern making machine.

2. The multifunctional pattern machine template as described in claim 1, characterized in that, The side of the base plate is provided with a positioning protrusion, and the side wall of the mounting groove is provided with a positioning groove corresponding to the positioning protrusion. The positioning groove engages with the positioning protrusion.

3. The multifunctional pattern machine template as described in claim 1, characterized in that, The base plate is provided with outline marking lines, which form the positioning part.

4. The multifunctional pattern machine template as described in claim 1, characterized in that, The multiple positioning holes are divided into two rows, and the multiple positioning holes in each row are arranged at intervals along a preset path.

5. The multifunctional pattern machine template as described in claim 1, characterized in that, The upper plate includes an upper frame and an upper bonding plate. The upper bonding plate is embedded in the upper frame and has multiple positioning holes. The bottom surface of the upper frame is flush with the bottom surface of the upper bonding plate.

6. The multifunctional pattern machine template as described in claim 5, characterized in that, The upper bonding plate is a transparent plate.

7. The multifunctional pattern machine template as described in claim 5, characterized in that, The upper frame is a ring structure, the upper bonding plate is a circular plate, and the plurality of positioning holes are arranged around the central axis of the upper bonding plate.

8. The multifunctional pattern machine template as described in claim 1, characterized in that, The positioning hole has a slope that gradually slopes outward from bottom to top.

9. A pattern-making machine, characterized in that, include: The body of the pattern machine; A movable component includes a movable part and a lifting part, wherein the movable part is slidably disposed on the body of the pattern machine along a first horizontal direction, and the lifting part is disposed on the top of the movable part; as well as According to any one of claims 1-8, in the multi-functional pattern machine template, the mounting part of the mounting frame is connected to the moving part, and the upper plate of the multi-functional pattern machine template is connected to the lifting part.

10. The pattern-making machine as described in claim 9, characterized in that, The moving component includes: A movable plate is slidably disposed on the body of the pattern machine along the first horizontal direction; An expansion joint, fixed to the top of the movable plate, has a telescopic end on its side that extends and retracts along a second horizontal direction, the first horizontal direction being perpendicular to the second horizontal direction, and the telescopic end forming the movable part; and The support arm includes a support section and a horizontal section. The support section is vertically arranged and connected to the telescopic end. The horizontal section is fixed to the top of the support section along the second horizontal direction. A lifter is provided at the end of the horizontal section away from the support section. The lifter forms the lifting part and is connected to the upper plate.

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