Metal material transportation and storage device with protection mechanism

Abstract

The invention provides a metal material transportation and storage device with a protection mechanism, and relates to the field of metal material storage. The upper surface of the tray bottom plate is fixedly connected with four tray stand columns, and the four tray stand columns are all perpendicular to the upper surface of the tray bottom plate. The number of the lifting frames is five, the five lifting frames are arranged in a longitudinally aligned mode, and the lifting frames are connected to the tray stand columns in a sliding mode. According to the metal steel pipe transportation and storage device, a single steel pipe isolating and fixing structure is arranged, so that the situation that the steel pipes are rubbed and collided due to shaking in the transportation process is avoided, and the space utilization rate of the storage device is effectively increased. The problems that when steel pipes are placed on an existing goods shelf and an existing tray for storing the steel pipes for transportation, the tray and the goods shelf shake due to shaking of a vehicle, the steel pipes are prone to collision or friction in the shaking or falling process, and the outer surfaces of the steel pipes are collided or abraded are solved.

Description

Technical Field

[0001] The invention relates to the technical field of metal material storage, and in particular to a metal material transportation and storage device with a protection mechanism. Background Art

[0002] The surface roughness of stainless steel pipes can be reduced and the smoothness of the steel pipes can be improved by grinding and polishing. Steel pipes are generally stored by stacking on pallets or placing on shelves. When storing such steel pipes, in order to prevent the outer surface of the steel pipes from being damaged by collision and friction during transportation, the steel pipes are often packaged separately or wrapped with wrapping paper or packaging film and then stored on pallets or shelves.

[0003] When existing steel pipe storage shelves and pallets are used to place steel pipes for transportation, the pallets and shelves shake due to the shaking of the vehicle. Common pallets and shelves lack protective mechanisms, and the placement stability of pipe materials is poor. The shaking can easily cause the steel pipes to roll down, which can easily cause safety accidents. The steel pipes are prone to collision or friction during the shaking or falling process, causing bumps or wear on their outer surfaces, affecting the quality and appearance of the steel pipes. Summary of the invention

[0004] The present invention provides a metal material transportation and storage device with a protection mechanism, which specifically includes: a pallet bottom plate; four pallet columns are fixedly connected to the upper surface of the pallet bottom plate, and the four pallet columns are perpendicular to the upper surface of the pallet bottom plate; a lifting frame, the lifting frame is provided with five locations, the five lifting frames are longitudinally aligned and arranged, and the lifting frame is slidably connected to the pallet columns; a lifting top frame, the lifting top frame is movably connected to the top of the lifting frame; a workpiece storage rack, the workpiece storage rack is movably connected in the lifting frame; a tube body placing arc belt, the tube body placing arc belt is movably connected to the workpiece storage rack; a height positioning baffle, the height positioning baffle is provided with four locations, and the four height positioning baffles are slidably connected to the lifting top frame.

[0005] Furthermore, the inner surface of the pallet column is fixedly connected to a column guide rod by bolts, and the upper end of the column guide rod is connected to a guide rod limiting end block by welding.

[0006] Furthermore, the lifting frame is a "C"-shaped frame with an opening facing forward, and two lifting sliders are fixedly connected to the left and right surfaces of the lifting frame by bolts, and the four lifting sliders are slidably connected to the four column guide rods.

[0007] Furthermore, four groups of lifting frames located above among the five lifting frames are respectively fixedly connected with four lifting limit rods on the left and right surfaces, the lifting limit rods are perpendicular to the upper surface of the pallet bottom plate, and the lower ends of the lifting limit rods are fixedly connected with rod limit end blocks, and four limit cams are respectively fixedly connected with the left and right surfaces of the lifting frames, and the lifting limit rods of the two adjacent groups of lifting frames are slidably connected with the limit cams.

[0008] Furthermore, the inner surfaces of the left and right racks of the lifting frame are respectively provided with a pull-out guide wheel groove, and the pull-out guide wheel groove is a groove body with a rectangular cross-section. The front ends of the racks on both sides of the lifting frame are penetrated by pull-out positioning sockets with a rectangular through-groove structure, and the pull-out positioning sockets are tightly and slidably connected with a limit stop rod.

[0009] Furthermore, four lifting insert rings are fixedly connected to the upper surface of the lifting top frame, and a lifting pull ring is fixedly connected to the middle of the upper surface of the lifting top frame.

[0010] Furthermore, four frame pull rods are welded on the left and right edges of the lifting frame, respectively. The frame pull rods are perpendicular to the upper surface of the lifting frame. The lower ends of the frame pull rods are fixedly connected to the frame limit end blocks. The frame pull rods are slidably connected to the limit convex cylinders of the lifting frame at the top.

[0011] Furthermore, a positioning end block is welded on both sides of the front surface and the rear surface of the lifting top frame, and an end block slide groove with a rectangular through groove structure is horizontally penetrated through the positioning end block. Two anti-slip pads made of rubber are fixedly connected to the lower surface of the lifting top frame.

[0012] Furthermore, the workpiece storage rack is assembled by welding two mutually parallel movable side rods and four mutually parallel middle support shafts, the movable side rods and the middle support shafts are perpendicular to each other, the outer surface of the movable side rods is rotatably connected with five side rod guide wheels, the side rod guide wheels are rollingly connected in the pull-out guide wheel grooves, the side rod guide wheels are rotatably connected with movable support wheels through bearings, the wheel surface of the movable support wheels is provided with an arc-shaped concave structure, the four movable support wheels in the same row are connected by a tube body placed arc band, and the cross-section of the tube body placed arc band also has an arc-shaped structure.

[0013] Furthermore, the height positioning baffle rod is a rectangular rod body, and the height positioning baffle rod is tightly slidably connected inside the end block slide groove, and both ends of the height positioning baffle rod are bent upward to form baffle rod limiting folded ends.

[0014] The beneficial effects are as follows: 1. The steel pipe transport and storage device of the present invention is a layered storage device, which can place and fix steel pipes in layers. When the transport and storage device is unloaded, the distance between the upper and lower adjacent lifting frames and the lifting top frame is small due to the gravity of the lifting top frame and the lifting frame. Before use, the lifting top frame needs to be lifted by a lifting mechanism via a forklift. The lifting of the lifting top frame causes the top frame limit end block to be squeezed with the limit convex cylinder, thereby driving the lifting frame to be lifted. The lifting frame is moved upward by the continuous lifting of the lifting top frame, thereby increasing the longitudinal distance between the five workpiece storage racks. After the distance is adjusted appropriately, the height positioning stopper is pulled outward from the inside of the end block slide slot so that the height positioning stopper is located at the pallet column. At the top, the height of the lifting top frame is limited by the action of the height positioning levers at all four sides, and the lifting mechanism or forklift can be evacuated, the limit lever can be pulled outward, and the workpiece storage rack can be pulled forward. The sliding connection between the side rod guide wheel and the pull-out guide wheel groove plays a guiding role, so that the workpiece storage rack can move forward straightly, which is convenient for the placement of steel pipes. When placing the steel pipes, place the steel pipes on the upper surface of the arc belt of the pipe body, and then push the steel pipes backward. The activity of the arc belt of the pipe body drives the movable support wheel to rotate, so that the steel pipes can be easily placed in the set area. After the single-layer workpiece storage rack is placed, it is pushed back into the lifting frame, and the limit lever is pushed inward to reset it, so that the steel pipes can be placed. The workpieces can be placed after the frame structure is adjusted, and the placement is quick.

[0015] 2. After the steel pipes are placed, the storage device in the present application pushes the height positioning stop rod inward to move the height positioning stop rod out from above the pallet column, and the lifting frame is slowly lowered by a sling or a forklift, and the five lifting frames are moved downward under the gravity of the lifting frame and the lifting frame, and the longitudinal gap is reduced, so that each steel pipe is clamped by the upper surface and the lower surface at the same time, and the uppermost steel pipe is contacted with the anti-slip pad by the gravity of the lifting frame to position it to avoid sliding, thereby achieving clamping and positioning of multi-layer steel pipes; it can be seen that the metal steel pipe transportation and storage device in the present application is provided with a single isolation and fixing structure for the steel pipe, so that the steel pipe is protected from shaking during transportation, and friction and bumping caused by shaking during transportation are avoided. The steel pipe is convenient to place and easy to adjust the position of the steel pipe, so that it is convenient to arrange it neatly, which effectively improves the space utilization rate of the storage device.

[0016] 3. The surface of the steel pipe in the present invention is in contact with the arc band placed on the pipe body. The arc band placed on the pipe body is soft in texture, and the probability of the steel pipe being compressed and causing stress concentration and deformation is reduced under the action of the movable support wheel of the arc surface structure. The steel pipe is clamped and positioned by the gravity of the steel pipe and the frame, and the positioning is stable, so that the steel pipe is not easy to slip off and has good transportation stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1is a schematic structural diagram of an embodiment of the present invention; Figure 2 is a schematic diagram of the structure of an embodiment of the present invention in an unfolded state; Figure 3 It is a schematic structural diagram of a frame of an embodiment of the present invention; Figure 4 It is a schematic structural diagram of a lifting frame according to an embodiment of the present invention; Figure 5 It is a schematic structural diagram of a lifting top frame according to an embodiment of the present invention; Figure 6 is a schematic structural diagram of a workpiece storage rack according to an embodiment of the present invention; Figure 7 An embodiment of the present invention Figure 1 A schematic diagram of the structure of the local enlargement of the A; Figure 8 An embodiment of the present invention Figure 2 A schematic diagram of the structure of the local enlargement at B; Fig. 9 An embodiment of the present invention Figure 4 A schematic diagram of the structure of the local enlargement at C; Fig.10 An embodiment of the present invention Figure 4 Schematic diagram of the structure with a partial enlargement at D.

[0018] Reference numerals list 1. Pallet bottom plate; 2. Pallet column; 201. Column guide rod; 202. Guide rod limit end block; 3. Lifting frame; 301. Lifting slider; 302. Lifting limit pull rod; 303. Pull rod limit end block; 304. Limit convex cylinder; 305. Pull-out guide wheel groove; 306. Pull-out positioning socket; 307. Limit stopper; 4. Lifting top frame; 401. Lifting plug ring; 402. Top frame pull rod; 403. Top frame limit end block; 404. Lifting pull ring; 405. Positioning end block; 406. End block slide groove; 407. Anti-slip pad; 5. Workpiece storage rack; 501. Movable side rod; 502. Middle support shaft; 503. Side rod guide wheel; 504. Movable support wheel; 6. Tube body placement arc belt; 7. Height positioning stopper; 701. Stopper limit fold end. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and examples.

[0020] Example: Please refer to Figures 1 to 10 As shown: The present invention provides a metal material transport and storage device with a protection mechanism, comprising a pallet bottom plate 1; four pallet columns 2 are fixedly connected to the upper surface of the pallet bottom plate 1, and the four pallet columns 2 are perpendicular to the upper surface of the pallet bottom plate 1; the inner surface of the pallet column 2 is fixedly connected to a column guide rod 201 by bolts, and the upper end of the column guide rod 201 is connected to a guide rod limiting end block 202 by welding, and the guide rod limiting end block 202 plays a limiting role to prevent the lifting frame 3 from separating from the pallet column 2 during the lifting process; the lifting frame 3, the lifting frame 3 is provided with five positions, and the five lifting frames 3 are arranged in a longitudinal alignment, and the lifting frame 3 is slidably connected to the pallet column 2; the lifting frame 4 is movably connected to the top of the lifting frame 3, the upper surface of the lifting frame 4 is fixedly connected with four lifting insert rings 401, the middle of the upper surface of the lifting frame 4 is fixedly connected with a lifting pull ring 404, the left edge and the right edge of the lifting frame 4 are respectively welded with four frame pull rods 402, the frame pull rods 402 are perpendicular to the upper surface of the lifting frame 4, the lower end of the frame pull rod 402 is fixedly connected with a frame limit end block 403, and the frame pull rod 402 is slidably connected to the limit convex cylinder 304 of the lifting frame 3 located at the top; the front surface of the lifting frame 4 is connected to the lifting frame 4 on both sides. A positioning end block 405 is welded on both sides of the rear surface, and an end block slide groove 406 with a rectangular through-groove structure is horizontally penetrated on the positioning end block 405. Two rubber anti-skid pads 407 are fixedly connected to the lower surface of the lifting top frame 4; the lifting top frame 4 can be controlled to move up by inserting the lifting fork of a forklift into the lifting plug ring 401, and the lifting pull ring 404 is fixed by the lifting mechanism to control the lifting top frame 4 to move up; the workpiece storage rack 5 is movably connected to the lifting frame 3; the pipe body is placed with an arc belt 6, and the pipe body is placed with an arc belt 6 movably connected to the workpiece storage rack 5; the height positioning stopper 7 is provided with At four places, the height positioning stop rods 7 are all slidably connected to the lifting top frame 4. When the transport and storage device is in an unloaded state, due to the gravity of the lifting top frame 4 and the lifting frame 3, the distance between the upper and lower adjacent lifting frames 3 and the lifting top frame 4 is small. Before use, it is necessary to lift the lifting top frame 4 through a lifting mechanism and a forklift. Through the lifting of the lifting top frame 4, the top frame limit end block 403 and the limit convex cylinder 304 are squeezed, thereby driving the lifting frame 3 to lift. Through the continuous lifting of the lifting top frame 4, the lifting frame 3 is moved upward, so that the longitudinal distance between the five workpiece storage racks 5 is increased, thereby placing the steel pipes.

[0021] Among them, the lifting frame 3 is a "C"-shaped frame with its opening facing forward. The left surface and the right surface of the lifting frame 3 are fixedly connected with two lifting sliders 301 by bolts respectively. The four lifting sliders 301 are respectively slidably connected to the four column guide rods 201. The sliding connection between the lifting sliders 301 and the column guide rods 201 plays a guiding role, so that the lifting frame 3 is kept horizontal during the vertical movement.

[0022] Among them, four groups of lifting frames 3 located above the five lifting frames 3 are respectively fixedly connected with four lifting limit rods 302 on the left and right surfaces, the lifting limit rods 302 are perpendicular to the upper surface of the pallet bottom plate 1, and the lower ends of the lifting limit rods 302 are fixedly connected with rod limit end blocks 303, and four limit convex cylinders 304 are respectively fixedly connected on the left and right surfaces of the lifting frames 3, and the lifting limit rods 302 of the two adjacent groups of lifting frames 3 are slidably connected with the limit convex cylinders 304; when the upper lifting frame 3 moves upward, the lifting limit rod 302 moves upward and slides in the limit convex cylinders 304 of the lower lifting frame 3, and when the rod limit end block 303 contacts the limit convex cylinders 304, the upper lifting frame 3 can drive the lower lifting frame 3 to move upward by moving upward, thereby lifting the five lifting frames 3 and increasing the distance between the five lifting frames 3.

[0023] Among them, the inner surfaces of the left and right racks of the lifting frame 3 are respectively provided with a pulling guide wheel groove 305, and the pulling guide wheel groove 305 is a groove body with a rectangular cross-section. The front ends of the racks on both sides of the lifting frame 3 are penetrated by a pulling positioning socket 306 with a rectangular through-groove structure, and the pulling positioning socket 306 is tightly and slidably connected with a limited stopper rod 307; the workpiece storage rack 5 is made by welding and assembling two mutually parallel movable side rods 501 and four mutually parallel intermediate support shafts 502, the movable side rods 501 and the intermediate support shafts 502 are perpendicular to each other, and the outer surface of the movable side rod 501 is rotatably connected with five side rod guide wheels 503, and the side rod guide wheels 503 are rollingly connected in the pulling guide wheel groove 305, and the side rod guide wheels 503 are rotatably connected with movable support wheels 504 through bearings, and the wheel surface of the movable support wheel 504 is provided with an arc-shaped concave structure, and the four movable support wheels 504 in the same row 04 is connected through the arc band 6 placed on the tube body, and the cross-section of the arc band 6 placed on the tube body is also an arc-shaped structure; the workpiece storage rack 5 is slidably connected to the lifting frame 3 through the rolling connection between the side rod guide wheel 503 and the pull-out guide wheel groove 305, so that the workpiece storage rack 5 can be pulled out when the steel pipe is placed, which is convenient for the placement of the steel pipe. The surface of the pipe is in contact with the arc band 6 placed on the tube body. The arc band 6 placed on the tube body is soft in texture, and under the action of the movable support wheel 504 of the arc surface structure, the probability of the steel pipe being compressed and causing stress concentration and deformation is reduced; the limit stop rod 307 plays a role in limiting the workpiece storage rack 5. After the limit stop rod 307 is pulled outward, the side rod guide wheel 503 eliminates the limitation, and the workpiece storage rack 5 can be pulled forward. The sliding connection between the side rod guide wheel 503 and the pull-out guide wheel groove 305 plays a guiding role, so that the workpiece storage rack 5 moves straight forward, which is convenient for the placement of the steel pipe.

[0024] Among them, the height positioning stop rod 7 is a rectangular rod body, and the height positioning stop rod 7 is tightly slidably connected inside the end block slide groove 406, and the two ends of the height positioning stop rod 7 are bent upward to have a stop rod limiting folded end 701; through the action of the height positioning stop rod 7, when the lifting top frame 4 is lifted to a level higher than the upper end of the pallet column 2 by a forklift or a lifting device, the height positioning stop rods 7 at all four sides are pulled outward, so that the height positioning stop rods 7 are located at the upper end of the pallet column 2, preventing the lifting top frame 4 from sliding down, and limiting the height of the lifting top frame 4.

[0025] Specific usage and function of this embodiment: In the present invention, before use, it is necessary to lift the lifting frame 4 by a forklift through a lifting mechanism. By lifting the lifting frame 4, the frame limit end block 403 is squeezed with the limit convex cylinder 304, thereby driving the lifting frame 3 to lift. By continuously lifting the lifting frame 4, the lifting frame 3 moves upward. When the upper lifting frame 3 moves upward, the lifting limit pull rod 302 moves upward and slides in the limit convex cylinder 304 of the lower lifting frame 3. When the limit end block 303 of the pull rod is squeezed with the limit convex cylinder 304, the lifting frame 3 is lifted. 4, the upper lifting frame 3 can be moved upward to drive the lower lifting frame 3 to move upward, thereby lifting the five lifting frames 3 and increasing the spacing between the five lifting frames 3. After the spacing is adjusted appropriately, the height positioning stopper 7 is pulled outward from the inside of the end block slide groove 406 to make the height positioning stopper 7 located above the pallet column 2. The height of the lifting top frame 4 is limited by the action of the height positioning stopper 7 at four locations, and the lifting mechanism or forklift can be evacuated, the limit stopper 307 is pulled outward, and the workpiece storage rack 5 is pulled forward. The sliding connection between the rod guide wheel 503 and the pull-out guide wheel groove 305 plays a guiding role, so that the workpiece storage rack 5 moves forward straightly, which is convenient for placing the steel pipe. When placing the steel pipe, the steel pipe is placed on the upper surface of the pipe body placement arc belt 6, and then the steel pipe is pushed backward. The activity of the pipe body placement arc belt 6 drives the movable support wheel 504 to rotate, so that the steel pipe can be easily placed in the set area. After the single-layer workpiece storage rack 5 is placed, it is pushed back into the lifting frame 3, and the limit stop rod 307 is pushed inward to reset, and the placement of the steel pipe is completed; after the steel pipe is placed, The height positioning stop bar 7 is pushed inward to move the height positioning stop bar 7 out from above the pallet column 2, and the lifting frame 4 is slowly lowered by a sling or a forklift. The five lifting frames 3 are moved downward under the gravity of the lifting frame 4 and the lifting frame 3, and the longitudinal gap is reduced so that each steel pipe is clamped by the upper and lower surfaces at the same time. The uppermost steel pipe is brought into contact with the anti-slip pad 407 by the gravity of the lifting frame 4 to be positioned to avoid sliding. The clamping and positioning of the multi-layer steel pipes can be achieved, and the transportation and storage device can be transferred by a forklift.

Claims

1. A metal material transport and storage device with a protective mechanism, characterized in that: The invention comprises a pallet bottom plate (1); the upper surface of the pallet bottom plate (1) is fixedly connected with four pallet columns (2), and the four pallet columns (2) are perpendicular to the upper surface of the pallet bottom plate (1); a lifting frame (3), the lifting frame (3) is provided with five locations, the five lifting frames (3) are arranged in a longitudinal alignment, and the lifting frame (3) is slidably connected to the pallet columns (2); a lifting top frame (4), the lifting top frame (4) is movably connected to the top of the lifting frame (3); a workpiece storage rack (5), the workpiece storage rack (5) is movably connected in the lifting frame (3); a pipe body placement arc belt (6), the pipe body placement arc belt (6) is movably connected to the workpiece storage rack (5); and a height positioning stop rod (7), the height positioning stop rod (7) is provided with four locations, and the four height positioning stop rods (7) are slidably connected to the lifting top frame (4).

2. A metal material transport and storage device with a protective mechanism as claimed in claim 1, characterized in that: The inner surface of the pallet column (2) is fixedly connected to a column guide rod (201) by means of bolts, and the upper end of the column guide rod (201) is connected to a guide rod limiting end block (202) by means of welding.

3. A metal material transport and storage device with a protective mechanism as claimed in claim 2, characterized in that: The lifting frame (3) is a "C"-shaped frame with an opening facing forward. The left surface and the right surface of the lifting frame (3) are respectively fixedly connected with two lifting sliders (301) by bolts. The four lifting sliders (301) are respectively slidably connected to four column guide rods (201).

4. A metal material transport and storage device with a protection mechanism as claimed in claim 3, characterized in that: Four lifting limit rods (302) are fixedly connected on the left and right surfaces of the four groups of lifting frames (3) located at the top of the five lifting frames (3), respectively. The lifting limit rods (302) are perpendicular to the upper surface of the tray bottom plate (1), and the lower ends of the lifting limit rods (302) are fixedly connected to the rod limit end blocks (303). Four limit convex cylinders (304) are fixedly connected on the left and right surfaces of the lifting frames (3), respectively. The lifting limit rods (302) of the two adjacent groups of lifting frames (3) are slidably connected to the limit convex cylinders (304).

5. A metal material transport and storage device with a protection mechanism as claimed in claim 1, characterized in that: The inner surfaces of the left and right racks of the lifting frame (3) are respectively provided with a pull-out guide wheel groove (305), the pull-out guide wheel groove (305) being a groove body with a rectangular cross section, and the front ends of the racks on both sides of the lifting frame (3) are penetrated by pull-out positioning sockets (306) with a rectangular through-slot structure, and the pull-out positioning sockets (306) are tightly slidably connected to the limit stopper rods (307).

6. A metal material transport and storage device with a protection mechanism as claimed in claim 1, characterized in that: Four lifting insert rings (401) are fixedly connected to the upper surface of the lifting top frame (4), and a lifting pull ring (404) is fixedly connected to the middle of the upper surface of the lifting top frame (4).

7. A metal material transport and storage device with a protection mechanism as claimed in claim 4, characterized in that: Four frame pull rods (402) are welded on the left and right edges of the lifting frame (4), respectively. The frame pull rods (402) are perpendicular to the upper surface of the lifting frame (4), and the lower ends of the frame pull rods (402) are fixedly connected to the frame limit end blocks (403). The frame pull rods (402) are slidably connected to the limit convex cylinders (304) of the lifting frame (3) located at the top.

8. A metal material transport and storage device with a protection mechanism as claimed in claim 1, characterized in that: A positioning end block (405) is welded to both sides of the front surface and both sides of the rear surface of the lifting frame (4), and an end block slide groove (406) with a rectangular through groove structure is horizontally penetrated through the positioning end block (405). Two anti-skid pads (407) made of rubber are fixedly connected to the lower surface of the lifting frame (4).

9. A metal material transport and storage device with a protection mechanism as claimed in claim 5, characterized in that: The workpiece storage rack (5) is manufactured by welding and assembling two mutually parallel movable side rods (501) and four mutually parallel intermediate support shafts (502); the movable side rods (501) and the intermediate support shafts (502) are perpendicular to each other; the outer surface of the movable side rods (501) is rotatably connected to five side rod guide wheels (503); the side rod guide wheels (503) are rollingly connected in the drawing guide wheel grooves (305); the side rod guide wheels (503) are rotatably connected to movable support wheels (504) via bearings; the wheel surface of the movable support wheels (504) is provided with an arc-shaped concave structure; the four movable support wheels (504) in the same row are connected via a tube body placement arc belt (6); the cross section of the tube body placement arc belt (6) also has an arc-shaped structure.

10. A metal material transport and storage device with a protection mechanism as claimed in claim 8, characterized in that: The height positioning baffle rod (7) is a rectangular parallelepiped rod body, and the height positioning baffle rod (7) is tightly slidably connected inside the end block slide groove (406), and both ends of the height positioning baffle rod (7) are bent upward to form baffle rod limiting folded ends (701).

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