Water-cooling stamping shaping water-cooling machine

Abstract

The utility model relates to the technical field of shoe production, in particular to a water-cooling stamping shaping water-cooling machine. Comprising an assembling frame, a snakelike metal pipe is horizontally and fixedly arranged in the assembling frame, and the two ends of the snakelike metal pipe penetrate through the same side of the assembling frame and are fixedly provided with pipe joints. After two pieces of vamp cloth are placed on the upper surfaces of the two metal sliding plate material taking and placing parts, the displacement mechanism is started to drive the sliding plates to synchronously and horizontally move to the working part, then the two air cylinders are synchronously started to drive the pressing plate to move downwards, and the pressing plate is matched with the low-temperature metal sliding plates to conduct low-temperature stamping shaping on the cloth. Meanwhile, two pieces of new cloth are placed on the upper surface of the material taking and placing part of the sliding plate, after shaping lasts for preset time, the piston rod of the air cylinder retracts to drive the pressing plate to reset, then the displacement mechanism drives the sliding plate to synchronously and reversely move, the shaped cloth is moved back to the material taking and placing part to be taken down, and meanwhile the new cloth is moved to the working part; therefore, continuous stamping machining of multiple pieces of vamp cloth can be achieved, and the machining efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of shoe manufacturing technology, and more specifically, to a water-cooled stamping and shaping machine. Background Technology

[0002] In the shoe manufacturing process, in order to ensure that the shoe upper fabric is quickly and stably formed, improve the bonding strength and prevent heat damage, the shoe upper fabric needs to be flattened at a temperature below 10°C (commonly known as "cooling and setting").

[0003] In existing technology, after the shoe upper fabric is placed on a water-cooled low-temperature platform, it is stamped and shaped at low temperature by a vertically moving pressure plate. This stamping and shaping process takes tens of seconds to several minutes. The operator must wait until the process is completed before removing the shaped fabric and placing untreated fabric. This material change process involves a long interval, which affects the stamping efficiency of the shoe upper fabric. At the same time, after the low-temperature platform is cooled, water vapor in the air will condense on its surface. When the shoe upper fabric comes into contact with a lot of condensation, water stains will seep into the fibers, causing color difference stains, especially for light-colored fabrics. Therefore, after stamping a predetermined number of shoe upper fabrics, the operator needs to use an absorbent cloth to wipe away the condensation on the low-temperature platform, which is a lot of work. Utility Model Content

[0004] The purpose of this invention is to provide a water-cooled stamping and shaping machine to solve the problems mentioned in the background art.

[0005] 1. The process of changing the shoe upper fabric involves a long interval, which affects the stamping efficiency of the shoe upper fabric;

[0006] 2. Water vapor in the air will condense on its surface. After each predetermined amount of shoe upper fabric is stamped, the operator needs to use an absorbent cloth to wipe away the condensation on the low-temperature platform, which is a lot of work.

[0007] To address the above problems, the present invention aims to provide a water-cooled stamping and shaping water chiller, comprising an assembly frame. A serpentine metal tube is horizontally fixed inside the assembly frame, with both ends of the serpentine metal tube penetrating the same side of the assembly frame and fixed with pipe joints. Two metal sliding plates are slidably disposed on the top of the serpentine metal tube, with one side of each sliding plate extending to the outside of the assembly frame. The portion of the metal sliding plate directly above the serpentine metal tube is designated as a working section, and the portion of the metal sliding plate outside the assembly frame is designated as a material handling section. A displacement mechanism is provided between the two metal sliding plates to drive the two metal sliding plates to... The horizontal reciprocating movement interchanges the positions of the working part and the material handling part of the metal slide plate. A lifting frame is fixedly installed on the upper side wall of the assembly frame. A pressing mechanism is installed on the lifting frame at the position corresponding to each working part of the metal slide plate. When the pressing mechanism moves vertically downward, it presses the shoe upper fabric placed on the upper side wall of the working part vertically. A dehumidification mechanism is installed on the upper side wall of the assembly frame. When the pressing mechanism moves vertically downward, it drives the dehumidification mechanism to move vertically downward. At this time, the displacement mechanism drives the metal slide plate without shoe upper fabric to move horizontally reciprocating. The downward-moving dehumidification mechanism wipes away the condensate on the upper side wall of the working part and the material handling part.

[0008] As a further improvement to this technical solution, the upper sidewall of the assembly frame is provided with a groove extending to both sides. The sidewall of the groove and the corresponding position of the two metal slide plates away from each other are provided with sliding grooves. Both metal slide plates are set inside the groove. One side of the metal slide plate is slidably set in the sliding groove. A partition frame is provided between the two metal slide plates and is slidably connected to the two metal slide plates. The partition frame is fixed to the assembly frame by bolts.

[0009] As a further improvement to this technical solution, the displacement mechanism includes a servo motor fixedly installed on the side wall of the partition frame. The output shaft of the servo motor rotates through the top of the partition frame and is coaxially fixed with a gear via a spline. Both sides of the gear are meshed with racks, and the two racks are respectively fixedly installed on the side of the two metal slide plates that are close to each other.

[0010] As a further improvement to this technical solution, the pressing mechanism includes a base fixedly installed on the upper side wall of the lifting frame, a cylinder vertically fixedly installed on the upper side wall of the base, the piston rod end of the cylinder slidingly passing through the base and a pressure plate horizontally fixedly installed, the pressure plate being located directly above the working part of the metal slide plate.

[0011] As a further improvement to this technical solution, a connecting plate is horizontally fixed between the two pressure plates. The dehumidification mechanism includes an I-beam frame set below the connecting plate. Four sponges are fixedly installed on the lower side wall of the I-beam frame on both sides of the partition frame. The sponges are located directly above the metal slide plate near the edge of the assembly frame.

[0012] As a further improvement to this technical solution, the dehumidification mechanism also includes two guide rods that are respectively vertically fixed to the upper side wall of the partition frame near both ends. The upper end of the guide rod slides through the I-shaped frame and extends outward. A spring is provided between the I-shaped frame and the partition frame, and the spring pushes the I-shaped frame away from the partition frame.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This water-cooled stamping and shaping machine, after placing two shoe upper fabrics on the upper surfaces of two metal slide plates for picking and placing, activates the displacement mechanism to move the slide plates horizontally to the working section. Then, two cylinders are activated simultaneously to drive the pressure plate downwards, cooperating with the low-temperature metal slide plates to perform low-temperature stamping and shaping of the fabric. At the same time, two new fabrics are placed on the upper surfaces of the slide plate for picking and placing. After the shaping continues for a predetermined time, the cylinder piston rod retracts, driving the pressure plate to reset. Then, the displacement mechanism drives the slide plates to move in the opposite direction, moving the shaped fabric back to the picking and placing section for removal, while the new fabric is moved to the working section. By repeating this cycle, continuous stamping processing of multiple shoe upper fabrics can be achieved, improving processing efficiency.

[0015] 2. In this water-cooled stamping and shaping water-cooling machine, when the piston rods of the two cylinders extend and drive the pressure plate downward, the connecting plate simultaneously presses the I-beam frame and the sponge downward along the guide rod axis, so that the lower surface of the sponge contacts the upper surface of the metal slide plate. Then, the operator drives the metal slide plate to perform horizontal reciprocating motion through the displacement mechanism, so that the four sponges fully contact and rub against the area on the metal slide plate where the shoe upper fabric is placed, thereby absorbing the condensate water at the contact point, realizing the rapid cleaning of condensate water on the metal slide plate and avoiding condensate water contamination of the shoe upper fabric. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is one of the partial structural schematic diagrams of this utility model;

[0018] Figure 3 This is a second schematic diagram of a partial structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the serpentine metal tube of this utility model;

[0020] Figure 5 This is a cross-sectional view of the present invention;

[0021] Figure 6 For the present utility model Figure 5 Enlarged view of the structure at point A in the middle;

[0022] Figure 7 This is a schematic diagram of the dehumidification mechanism of this utility model.

[0023] The meanings of the labels in the diagram are as follows:

[0024] 1. Assembly frame; 11. Groove; 12. Support rod;

[0025] 2. Metal skateboard;

[0026] 3. Raise the frame;

[0027] 4. Pressing mechanism; 41. Base; 42. Cylinder; 43. Pressure plate; 44. Slide rod;

[0028] 5. Divider rack;

[0029] 6. Serpentine metal tube;

[0030] 7. Displacement mechanism; 71. Gear; 72. Rack;

[0031] 8. Dehumidification mechanism; 81. I-beam frame; 82. Sponge; 83. Guide rod; 84. Spring;

[0032] 9. Connecting plate. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Example 1

[0035] Please see Figures 1-4As shown, one of the objectives of this embodiment is to provide a water-cooled stamping and shaping water chiller, including an assembly frame 1. A serpentine metal tube 6 is horizontally fixed inside the assembly frame 1. Several support rods 12 are also horizontally arrayed and fixed inside the assembly frame 1. The upper sidewall of the support rods 12 contacts the bottom of the serpentine metal tube 6. The support rods 12 support the serpentine metal tube 6, maintaining it in a stable horizontal state inside the assembly frame 1. Both ends of the serpentine metal tube 6 penetrate the same side of the assembly frame 1 and are fixed with pipe joints. Each pipe joint is connected to the inlet and outlet of an industrial chiller (not shown in the attached diagram) via a pipe. The industrial chiller is a commercially available and mature product, and its specific structure and working principle will not be described in detail here. The industrial chiller continuously injects cold water at 4–10°C into the serpentine metal tube 6 and receives the cold water flowing out, so that the cold water circulates inside the serpentine metal tube 6. During this process, the cold water exchanges heat with the tube wall of the serpentine metal tube 6, which lowers the temperature of the tube wall of the serpentine metal tube 6 to 4–10°C.

[0036] Two metal slide plates 2 are slidably disposed on the top of the serpentine metal tube 6. One side of the metal slide plate 2 extends to the outside of the assembly frame 1. A groove 11 extending to both sides is provided on the upper side wall of the assembly frame 1. Slide grooves are provided on the side wall of the groove 11 and at the corresponding positions on the opposite side of the two metal slide plates 2. The two metal slide plates 2 are disposed inside the groove 11, and one side of the metal slide plate 2 is slidably disposed in the slide groove. A partition frame 5 is provided between the two metal slide plates 2 and is slidably connected to the two metal slide plates 2. The partition frame 5 is fixed to the assembly frame 1 by bolts. The slide groove and the partition frame 5 together constrain the metal slide plates 2, so that the metal slide plates 2 can only move in the horizontal direction.

[0037] The part of the metal slide plate 2 located directly above the serpentine metal tube 6 is designated as the working section, which is the station for stamping and shaping the shoe upper fabric. The part of the metal slide plate 2 located outside the assembly frame 1 is designated as the material handling section. Here, the operator takes out the shoe upper fabric that has been stamped and shaped and places the shoe upper fabric to be stamped. A displacement mechanism 7 is set between the two metal slide plates 2. The displacement mechanism 7 is used to drive the two metal slide plates 2 to move horizontally back and forth, so that the positions of the working section and the material handling section of the metal slide plate 2 are interchanged. A lifting frame 3 is fixedly set on the upper side wall of the assembly frame 1. A pressing mechanism 4 is set on the lifting frame 3 at the position corresponding to the working section of each metal slide plate 2. When the pressing mechanism 4 moves vertically downward, the pressing mechanism 4 presses the shoe upper fabric placed on the upper side wall of the working section vertically.

[0038] After the operator places the shoe upper fabric to be processed in the material handling section, the displacement mechanism 7 drives the metal slide plate 2 to move horizontally, moving the shoe upper fabric to the working section. Then, the pressing mechanism 4 moves vertically downward to press and shape the shoe upper fabric. At the same time, the shaped shoe upper fabric originally located in the working section moves with the metal slide plate 2 to the material handling section for easy removal by the operator. After the operator removes the finished product, a new shoe upper fabric to be processed is placed in the material handling section. After the pressing mechanism 4 completes the predetermined time for pressing and shaping the shoe upper fabric at the current workstation, the operator controls the pressing mechanism 4 to return to its vertical position. Then, the displacement mechanism 7 drives the metal slide plate 2 to move in the opposite direction, so that the metal slide plate 2 can move the shoe upper fabric to the working section. By repeating the above steps, continuous stamping processing of the shoe upper fabric can be achieved, thereby improving the efficiency of stamping and shaping the shoe upper fabric.

[0039] The structure of displacement mechanism 7 is detailed below, referring to... Figure 5 and Figure 6 The displacement mechanism 7 includes a servo motor fixedly installed on the upper side wall of the partition frame 5. The servo motor is electrically connected to an external control device. The control device can control the rotation direction and rotation angle of the servo motor output shaft. The output shaft of the servo motor rotates through the top of the partition frame 5 and is coaxially fixed with a gear 71 via a spline. Both sides of the gear 71 are meshed with racks 72. The two racks 72 are respectively fixed on the side of the two metal slide plates 2 that are close to each other. After the servo motor starts, its output shaft drives the gear 71 to rotate. Through the meshing transmission between the gear 71 and the two racks 72, the two racks 72 drive the corresponding metal slide plates 2 to move in opposite directions. After the moving metal slide plate 2 completes the position switch between the working part and the material picking and placing part, the operator controls the output shaft of the servo motor to rotate in the opposite direction through the control device, so that the metal slide plate 2 can move in the opposite direction, realizing the switch between the working part and the material picking and placing part again, and meeting the material picking and placing requirements of the shoe upper fabric.

[0040] The structure of the pressing mechanism 4 is described in detail below, with reference to... Figure 2The pressing mechanism 4 includes a base 41 fixedly mounted on the upper side wall of the lifting frame 3. A cylinder 42 is vertically fixedly mounted on the upper side wall of the base 41. The piston rod of the cylinder 42 slides through the base 41 and a pressure plate 43 is horizontally fixedly mounted thereon. The pressure plate 43 is located directly above the working part of the metal slide plate 2. Two sliding rods 44 are symmetrically and vertically fixed on the upper side wall of the pressure plate 43. The upper end of the sliding rod 44 slides through the base 41 and extends outward. When the metal slide plate 2 moves the shoe upper fabric to the working part, the piston rods of the two cylinders 42 extend synchronously. The piston rods drive the pressure plate 43 to move downward along the axis of the sliding rod 44 until the pressure plate 43 and the metal slide plate 2 cooperate to clamp the shoe upper fabric between them. During this process, the metal slide plate 2 cools down to 4–10°C through heat exchange with the wall of the serpentine metal tube 6. The shoe upper fabric cools down synchronously through heat exchange with the cooled metal slide plate 2, thereby realizing the stamping and shaping of the shoe upper fabric in a low-temperature environment.

[0041] After the metal slide plate 2 cools down to 4–10℃, water vapor in the air will condense on its surface. When the shoe upper fabric comes into contact with this condensation, the water stains will seep into the fibers, causing color difference pollution, especially for light-colored fabrics. To solve this problem, a dehumidification mechanism 8 is set on the upper side wall of the assembly frame 1. After the operator flattens a predetermined number of shoe upper fabrics (the number is set according to the rate of condensation), the operator stops placing shoe upper fabrics on the metal slide plate 2 and performs the following dehumidification operation: When the pressing mechanism 4 moves vertically downward, the pressing mechanism 4 drives the dehumidification mechanism 8 to move vertically downward. At this time, the displacement mechanism 7 drives the metal slide plate 2 without shoe upper fabric to move horizontally back and forth. The downward-moving dehumidification mechanism 8 wipes away the condensation on the upper side wall of the working part and the material handling part. After the metal slide plate 2 has completed dehumidification, the subsequent stamping and shaping operation of the shoe upper fabric can be carried out normally.

[0042] Reference Figure 3 A connecting plate 9 is horizontally fixed between the two pressure plates 43. The structure of the dehumidification mechanism 8 is described in detail below, referring to... Figure 7 The dehumidification mechanism 8 includes a frame 81 located below the connecting plate 9. The shape of the frame 81 is specially designed so that it will not interfere with the position of the pressure plate 43. Four sponges 82 are fixedly installed on the lower side wall of the frame 81 on both sides of the partition frame 5. The sponges 82 are located directly above the metal slide plate 2 near the edge of the assembly frame 1. When the sponges 82 are in the initial state, a certain gap is maintained between the lower side wall of the sponges 82 and the upper side wall of the metal slide plate 2. This gap is greater than the thickness of the shoe upper fabric to avoid the sponges 82 from hindering the horizontal movement of the shoe upper fabric.

[0043] The dehumidification mechanism 8 also includes two guide rods 83 that are respectively vertically fixed to the upper side wall of the partition frame 5 near both ends. The upper end of the guide rod 83 slides through the I-shaped frame 81 and extends outward. The guide rod 83 restricts the I-shaped frame 81 to move only along the axial direction of the guide rod 83. A spring 84 is provided between the I-shaped frame 81 and the partition frame 5 and is sleeved on the guide rod 83. The spring 84 pushes the I-shaped frame 81 away from the partition frame 5.

[0044] When the piston rods of the two cylinders 42 extend synchronously, they drive the two pressure plates 43 to move the connecting plate 9 downwards synchronously. After the downward-moving connecting plate 9 contacts the upper side wall of the I-frame 81, it presses the I-frame 81 and the sponge 82 downwards synchronously along the axis of the guide rod 83. During this process, the distance between the I-frame 81 and the separator 5 shortens, and the spring 84 is compressed. When the lower side wall of the sponge 82 contacts the upper side wall of the metal slide plate 2, the operator drives the metal slide plate 2 to move horizontally back and forth through the displacement mechanism 7. The moving metal slide plate 2 and the sponge 82 move relative to each other, so that the four sponges 82 are in full contact with the area on the metal slide plate 2 where the shoe upper fabric is placed, thereby absorbing the condensate on the contact area. This achieves rapid cleaning of the condensate on the metal slide plate 2 and avoids the condensate from contaminating the shoe upper fabric.

[0045] After the condensate is removed, the operator controls the piston rod of cylinder 42 to retract, which drives the pressure plate 43 and connecting plate 9 to reset. At this time, spring 84 rebounds, driving the die frame 81 and sponge 82 to reset, and the subsequent stamping and shaping of the shoe upper fabric can be carried out normally.

[0046] When using this device, the operator first places two pieces of shoe upper fabric onto the upper surfaces of the two metal slide plates 2, respectively. Then, the displacement mechanism 7 is activated to move the two metal slide plates 2 horizontally in sync, transporting the shoe upper fabric to the working section. Next, the two cylinders 42 are activated simultaneously, extending their piston rods to move the corresponding pressure plates 43 downwards. The pressure plates 43 cooperate with the metal slide plates 2, which are in a low-temperature state, to perform low-temperature stamping and shaping on the shoe upper fabric. At the same time, the operator places two new pieces of shoe upper fabric onto the upper surfaces of the two metal slide plates 2, respectively. After the material is loaded, the stamping and shaping continues for a predetermined time. After the shaping is completed, the operator controls the piston rods of the two cylinders 42 to retract synchronously, causing the pressure plates 43 to reset. Then, the displacement mechanism 7 moves the two metal slide plates 2 in the opposite direction synchronously, moving the stamped shoe upper fabric back to the picking and placing section for removal. At the same time, the newly placed unstamped shoe upper fabric is moved to the working section. By repeating the above operations, continuous stamping processing of multiple shoe upper fabrics can be achieved, improving processing efficiency.

[0047] After the operator flattens the predetermined amount of shoe upper fabric, they pause placing new fabric on the metal slide plate 2 and perform the following dehumidification operation: When the piston rods of the two cylinders 42 extend and drive the pressure plate 43 to move downward, the connecting plate 9 simultaneously presses the I-frame 81 and the sponge 82 downward along the axis of the guide rod 83, so that the lower surface of the sponge 82 contacts the upper surface of the metal slide plate 2. Then, the operator drives the metal slide plate 2 to perform horizontal reciprocating motion through the displacement mechanism 7, so that the four sponges 82 fully contact and rub against the area on the metal slide plate 2 where the shoe upper fabric is placed, thereby absorbing the condensate water at the contact point and preventing the condensate water from contaminating the shoe upper fabric placed subsequently.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A water-cooled stamping and shaping water-cooling machine, comprising an assembly frame (1), characterized in that: A serpentine metal tube (6) is horizontally fixed inside the assembly frame (1). Both ends of the serpentine metal tube (6) pass through the same side of the assembly frame (1) and are fixed with pipe joints. Two metal slide plates (2) are slidably arranged on the top of the serpentine metal tube (6). One side of the metal slide plate (2) extends to the outside of the assembly frame (1). The part of the metal slide plate (2) directly above the serpentine metal tube (6) is set as the working part, and the part of the metal slide plate (2) outside the assembly frame (1) is set as the material handling part. A displacement mechanism (7) is set between the two metal slide plates (2). The displacement mechanism (7) is used to drive the two metal slide plates (2) to move horizontally back and forth, so that the working part of the metal slide plate (2) and the material handling part are connected. The positions of the material handling and dispensing sections are interchanged. A lifting frame (3) is fixedly installed on the upper side wall of the assembly frame (1). A pressing mechanism (4) is installed on the lifting frame (3) at the position corresponding to the working part of each metal slide plate (2). When the pressing mechanism (4) moves vertically downward, it presses the shoe upper fabric placed on the upper side wall of the working part vertically. A dehumidification mechanism (8) is installed on the upper side wall of the assembly frame (1). When the pressing mechanism (4) moves vertically downward, it drives the dehumidification mechanism (8) to move vertically downward. At this time, the displacement mechanism (7) drives the metal slide plate (2) without shoe upper fabric to move horizontally back and forth. The downward-moving dehumidification mechanism (8) wipes away the condensate on the upper side wall of the working part and the material handling and dispensing section.

2. The water-cooled stamping and shaping water-cooling machine according to claim 1, characterized in that: The upper sidewall of the assembly frame (1) is provided with a groove (11) extending to both sides. The sidewall of the groove (11) and the two metal slide plates (2) are provided with sliding grooves at positions corresponding to the opposite sides of each other. The two metal slide plates (2) are both set inside the groove (11). One side of the metal slide plate (2) is slidably set in the sliding groove. A partition frame (5) is provided between the two metal slide plates (2) and is slidably connected to the two metal slide plates (2). The partition frame (5) is fixed to the assembly frame (1) by bolts.

3. The water-cooled stamping and shaping water-cooling machine according to claim 2, characterized in that: The displacement mechanism (7) includes a servo motor fixedly installed on the upper side wall of the partition frame (5). The output shaft of the servo motor rotates through the top of the partition frame (5) and is coaxially fixed with a gear (71) via a spline. Both sides of the gear (71) are meshed with racks (72). The two racks (72) are respectively fixedly installed on the side of the two metal slide plates (2) that are close to each other.

4. The water-cooled stamping and shaping water-cooling machine according to claim 2, characterized in that: The pressing mechanism (4) includes a base (41) fixedly installed on the upper side wall of the lifting frame (3). A cylinder (42) is vertically fixedly installed on the upper side wall of the base (41). The piston rod end of the cylinder (42) slides through the base (41) and a pressure plate (43) is horizontally fixedly installed. The pressure plate (43) is located directly above the working part of the metal slide plate (2).

5. The water-cooled stamping and shaping water-cooling machine according to claim 4, characterized in that: A connecting plate (9) is horizontally fixed between the two pressure plates (43). The dehumidification mechanism (8) includes an I-frame (81) set below the connecting plate (9). Four sponges (82) are fixedly set on the lower side wall of the I-frame (81) on both sides of the partition frame (5). The sponges (82) are located directly above the metal slide plate (2) near the edge of the assembly frame (1).

6. The water-cooled stamping and shaping water-cooling machine according to claim 5, characterized in that: The dehumidification mechanism (8) also includes two guide rods (83) that are respectively vertically fixed to the upper side wall of the partition frame (5) near both ends. The upper end of the guide rod (83) slides through the I-shaped frame (81) and extends outward. A spring (84) is provided between the I-shaped frame (81) and the partition frame (5) and is sleeved on the guide rod (83). The spring (84) pushes the I-shaped frame (81) away from the partition frame (5).

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