Paperboard stacking device

Abstract

A paperboard stacking device comprises a base, a bearing part is arranged on the base, an interlocking part is arranged at one end of the base, and a discharging part is arranged on the base, stacking is conducted in a layer-by-layer natural falling mode, falling paperboards are supported through swing legs in the falling process, and when enough paperboards exist above the paperboard stacking device, the paperboard stacking device can be used for stacking the paperboards. When the paperboard falls, the swing legs can rotate downwards, limiting of the swing legs to the paperboard above the swing legs is eliminated, the paperboard moves downwards, the moving distance of the paperboard every time is short, the situation that the paperboard inclines due to flowing of air below the paperboard can be avoided, and the paperboard can be prevented from falling off through limiting of the inner vertical plate, the outer vertical plate and the like in the falling process. The problem that the paperboards are inclined can be further avoided, and the placed paperboards have high tidiness.

Description

TECHNICAL FIELD

[0001] The present application relates to the paperboard production technical field, especially to a paperboard stacking device. BACKGROUND

[0002] The paperboard needs to be pressed and cut during production, and then transferred to the stacking device by the conveying belt for stacking. The currently used stacking device has a vertical linear mechanism (such as a linear mechanism with a screw nut structure), and a tray is arranged on the linear mechanism. The height of the tray is adjusted by the linear mechanism during stacking, so that the paperboards are stacked one by one. This stacking method has the problem that it is not convenient to take out the stacked paperboards. When taking out, the stacked paperboards need to be pushed out or pulled out, and the paperboards are prone to misalignment during the taking-out process. In addition, the linear mechanism needs to be frequently started and stopped during the stacking process, which affects the service life of the linear mechanism, and the motor used needs to have high response capability, so the cost of the entire equipment is high. Currently, a limited falling type is also used. In this way, a tray is placed on the linear mechanism, and corresponding limiting parts are arranged above the tray. At least one pair of blocking mechanisms is arranged on the limiting parts. When the paperboards fall, the paperboards first fall on the blocking mechanisms. When the paperboards have enough quantity, the tray is moved to the lower side of the limiting parts by the linear mechanism, so as to wait for the opening of the blocking mechanisms. Then, the paperboards are moved to the tray, and then moved downward to wait for the next paperboards. This method can avoid frequent starting and stopping of the motor, and has high stacking efficiency. However, this method is prone to paperboard tilting, which leads to stacking failure. Secondly, this stacking method also needs to align the paperboards when bundling the paperboards, which brings inconvenience to the subsequent operation. SUMMARY

[0003] The present application provides a paperboard stacking device to solve the above-mentioned problems of the prior art. The present application solves the problem of insufficient neatness of the paperboards during stacking, and the problem of paperboard tilting during stacking. The present application has strong practicability.

[0004] In order to achieve the purpose of the present application, the following technologies are adopted: A paperboard stacking device, comprising a base, a receiving part arranged on the base, a locking part arranged at one end of the base, and a discharging part arranged on the base; The receiving part comprises a receiving plate, L-shaped plates arranged around the receiving plate, upper clamping plates bent from the L-shaped plates, limiters formed at the inner side ends of the upper clamping plates, a pair of convex plates formed at one end of the receiving plate, and supporting plates formed at the two sides of the convex plates; The locking part has a movably arranged blocking rod, which is used for limiting the supporting plates; The blanking part comprises a rectangular frame above the base, the rectangular frame is shaped with multiple pairs of avoidance grooves, so that the four sides of the rectangular frame are formed with inner vertical plates, the lower side of the inner vertical plate is respectively provided with an outer vertical plate, the two sides of the outer vertical plate and the inner vertical plate are respectively shaped with multiple pairs of protrusions, each pair of protrusions at the same height is rotatably provided with an inner rotating strip, the inner rotating strip is fixed with a pair of outward swinging levers, the outward swinging lever is sleeved with an outer rotating strip, the outward swinging lever is sleeved with a spreading spring, the spreading spring is located between the outer rotating strip and the inner rotating strip, the two ends of the outer rotating strip are respectively rotatably provided with a swinging leg, the swinging leg is rotatably provided with a fifth shaft, the fifth shaft is fixed with a concave seat, and the concave seat is welded on the outer wall of the outer vertical plate or the inner vertical plate.

[0005] Further, the receiving plate is in a rectangular structure, and multiple concave strips downwardly recessed are formed on the receiving plate along the length direction and the width direction thereof.

[0006] Further, the upper clamping plate is respectively provided with a clamping groove at both ends, four pairs of strip-shaped holes are formed on the receiving plate, a movable sleeve is movably arranged in the strip-shaped hole, the movable sleeve is clamped in the clamping groove, the upper end of the movable sleeve is fixed with a limiting upper ring, the lower end of the limiting upper ring abuts against the upper wall of the upper clamping plate, the lower end of the movable sleeve is fixed with a limiting lower ring, and the limiting lower ring is located on the lower side of the receiving plate.

[0007] Further, the movable sleeve movably arranged therein is provided with a pressing pin with an end at the upper end, a spring is sleeved on the pressing pin, the upper end of the spring abuts against the lower end of the pressing pin, the lower end of the spring abuts against the upper end of the limiting upper ring, the lower end of the pressing pin is fixed with an upper pull plate, the upper pull plate is located on the lower side of the limiting lower ring, the other end of the upper pull plate is inserted with an insertion rod, and the upper end of the insertion rod is welded on the lower wall of the receiving plate.

[0008] Further, the interlocking part comprises a lower strip fixed to one end of the base, end rods are welded at both ends of the lower strip, upper strips are welded at the upper ends of the end rods, vertical rods are fixed on the upper strips and the lower strip, a movable strip is movably arranged on the vertical rod, a downward spring is sleeved on the vertical rod, the upper end of the downward spring abuts against the upper strip, the lower end of the downward spring abuts against the movable strip, and the two ends of the movable strip are respectively bent with movable arms, and a blocking rod is rotatably arranged at the other end of the movable arm.

[0009] Further, a transverse hole is formed on the movable arm, a first shaft is rotatably arranged on the end rod, an inner rotating plate is fixed to the inner side end of the first shaft, the inner rotating plate is located on the inner side of the end rod, a top rod is fixed to the other end of the inner rotating plate, the top rod is inserted into the transverse hole on the side, an outer rotating plate is fixed to the outer side end of the first shaft, the outer rotating plate is located on the outer side of the end rod, a connecting rod is fixed to the other end of the outer rotating plate, the two ends of the connecting rod protrude from the outer side of the outer rotating plate, a positioning rotating plate is rotatably arranged on the upper end of the end rod through a second shaft, a positioning groove is formed at the other end of the positioning rotating plate in an open manner, and the two ends of the connecting rod are clamped in the positioning groove.

[0010] Further, the upper end of the outer vertical plate is bent on both sides to form lugs, the lugs are fixed with third shafts, the third shafts are sleeved with rotating blocks, the inner side of the rotating blocks is welded to the outer wall of the rectangular frame, the outer side of the rotating blocks is welded with outer plates, the outer plates are provided with vertical holes arranged vertically, the outer plates are also provided with horizontal holes arranged horizontally, the outer side of the third shafts is fixed with outer rotating arms, the outer rotating arms are open-endedly formed with bayonets; The outer wall of the rotating block is fixed with a pair of outer extension pins with end caps, the outer extension pins are sleeved with inner pressing plates and inner top springs, the outer side of the inner top springs abuts against the end caps of the outer extension pins, the inner side of the inner top springs abuts against the inner pressing plates, the inner pressing plates are fixed with locking screws, and the locking screws are arranged in the bayonets. The vertical holes are movably provided with locking rods.

[0011] The above technical scheme has the following advantages: The paperboard stacking device has the advantages that:

[0012] Secondly, the four limiting members arranged on the receiving plate can avoid the misalignment of the paperboard when the paperboard is moved to the bundling device after stacking, thereby facilitating the bundling operation, and the concave strips arranged on the receiving plate can facilitate the insertion of the bundling belt.

[0013] Finally, the position of the receiving plate is locked by the interlocking part, so that the stacking operation of the paperboard is not affected by the movement of the receiving plate during stacking. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings.

[0015] Figure 1 A perspective view of the paperboard stacking device is shown.

[0016] Figure 2 A first perspective view of the receiving part is shown.

[0017] Figure 3 A second perspective view of the receiving part is shown.

[0018] Figure 4 A third perspective view of the receiving part is shown.

[0019] Figure 5 A perspective view of the unloading part is shown.

[0020] Figure 6 A partial structural view of the unloading part is shown.

[0021] Figure 7 An enlarged view at A is shown.

[0022] Figure 8 A partial structural view of the unloading part is shown. DETAILED DESCRIPTION

[0023] As shown in Figure 1 , a paperboard stacking device comprises a base 1, the base 1 is provided with a receiving part 2, one end of the base 1 is provided with a locking part 3, and the base 1 is provided with an unloading part 4.

[0024] As shown in Figure 1 and Figure 4 , the base 1 is in a rectangular structure, a limiting side plate 10 is fixed on the base 1 by screws, and an end baffle 11 is fixed on the base 1 by screws, and the end baffle 11 is located at the inner side end of the limiting side plate 10.

[0025] As shown in Figures 2 to 4 , the receiving part 2 comprises a receiving plate 200, the receiving plate 200 is in a rectangular structure, a plurality of concave strips 201 downwardly recessed are formed on the receiving plate 200 along the length direction and the width direction thereof, one end of the receiving plate 200 is formed with a pair of convex plates 219, and the two sides of the convex plates 219 are upwardly bent to form supporting plates 220, the supporting plates 220 are in a wedge-shaped structure, and the inclined surface upper end of the supporting plates 220 extends obliquely towards the receiving plate 200.

[0026] A pair of vertical plates 216 are fixed on the lower side of the receiving plate 200 by screws, the vertical plates 216 are in a parallel arrangement, a plurality of roller shafts 218 are rotatably arranged on the vertical plates 216, the two ends of the roller shafts 218 are respectively fixed with rollers 217, the outer periphery of the rollers 217 abuts against the base 1, the rollers 217 located at the same side are located between the limiting side plate 10 and the vertical plate 216, and the inner side end of the vertical plate 216 abuts against the end baffle 11.

[0027] L-shaped plates 203 are arranged around the receiving plate 200, the horizontal segments of the L-shaped plates 203 are located on the lower side of the receiving plate 200, the inner walls of the vertical segments of the L-shaped plates 203 abut against the side walls of the receiving plate 200, the upper ends of the vertical segments of the L-shaped plates 203 are bent to form upper clamping plates 204, the upper clamping plates 204 are located above the receiving plate 200, the inner side ends of the upper clamping plates 204 are upwardly bent to form limiting members 206 in a concave structure, and the upper ends of the limiting members 206 are outwardly inclined to extend to form inclined plates 207.

[0028] The length direction two ends of the upper clamping plate 204 are respectively provided with a U-shaped clamping groove 205, the receiving plate 200 is provided with four pairs of strip-shaped holes 202, the strip-shaped hole 202 is movably provided with a movable sleeve 208, the movable sleeve 208 is clamped in the clamping groove 205, the upper end of the movable sleeve 208 is fixed with a limiting upper ring 210 through a pin, the lower end of the limiting upper ring 210 abuts against the upper wall of the upper clamping plate 204, the movable sleeve 208 is clamped in the clamping groove 205, the lower end of the movable sleeve 208 is fixed with a limiting lower ring 213 through a pin, the limiting lower ring 213 is located on the lower side of the receiving plate 200, the movable sleeve 208 is movably provided with a press pin 211 with a head at the upper end, the press pin 211 is sleeved with a spring 212, the upper end of the spring 212 abuts against the lower end of the press pin 211, the lower end of the spring 212 abuts against the upper end of the limiting upper ring 210, the lower end of the press pin 211 is fixed with an upper pull plate 214 through a pin, the upper pull plate 214 is located on the lower side of the limiting lower ring 213, the other end of the upper pull plate 214 is inserted with an insertion rod 215, the upper end of the insertion rod 215 is welded to the lower wall of the receiving plate 200.

[0029] As shown in Figures 2 to 4 The chain part 3 includes a lower strip 300 fixed to one end of the base 1 by a screw, both ends of the lower strip 300 are respectively welded with an end rod 301, the upper end of the end rod 301 is welded with an upper strip 302, the upper strip 302 and the lower strip 300 are fixed with a vertical rod 303 arranged vertically, the vertical rod 303 is movably provided with a movable strip 306, the vertical rod 303 is sleeved with a downward spring 304, the upper end of the downward spring 304 abuts against the upper strip 302, the lower end of the downward spring 304 abuts against the movable strip 306, both ends of the movable strip 306 are respectively bent with a movable arm 307, the other end of the movable arm 307 is rotatably provided with a blocking rod 313, the movable arm 307 is provided with a transverse hole 308 parallel to the length direction of the movable arm 307, the end rod 301 is rotatably provided with a first shaft 311, the inner side end of the first shaft 311 is fixed with an inner rotating plate 312, the inner rotating plate 312 is located on the inner side of the end rod 301, the other end of the inner rotating plate 312 is fixed with a top rod 314 through a thread, the top rod 314 penetrates the transverse hole 308 on the same side, the outer side end of the first shaft 311 is fixed with an outer rotating plate 309, the outer rotating plate 309 is located on the outer side of the end rod 301, the other end of the outer rotating plate 309 is fixed with a connecting rod 310, both ends of the connecting rod 310 protrude from the outer side of the outer rotating plate 309, the upper end of the end rod 301 is rotatably provided with a positioning rotating plate 316 through a second shaft 315, the other end of the positioning rotating plate 316 is open-shapedly formed with a U-shaped positioning groove 317, both ends of the connecting rod 310 are clamped in the positioning groove 317.

[0030] As shown in Figures 5 to 8As shown, the blanking part 4 includes two pairs of fixed legs 400 fixed on the base 1 by screws, the upper end of the fixed leg 400 is fixed with a fixed seat 401 by screws, the inner side end of the fixed seat 401 is welded with a rectangular frame 402, a pair of escape grooves 403 is formed at the lower end of the four sides of the rectangular frame 402 in a open manner, so that the four sides of the rectangular frame 402 form an inner vertical plate 404, the outer vertical plate 406 is respectively arranged below the inner vertical plate 404, a plurality of pairs of protrusions 405 are respectively formed on the two sides of the inner vertical plate 404 and the outer vertical plate 406, the upper end of the outer vertical plate 406 is bent with a lug 407 on both sides, the lug 407 is fixed with a third shaft 408, the third shaft 408 is sleeved with a rotating block 409, the inner side end of the rotating block 409 is welded on the outer wall of the rectangular frame 402, the outer side end of the rotating block 409 is welded with an L-shaped outer plate 410, the outer plate 410 is provided with a vertical hole 411 arranged in a vertical manner, and the outer plate 410 is also provided with a horizontal hole 412 arranged in a horizontal manner, the outer side end of the third shaft 408 is fixed with an outer rotating arm 419, and the outer side end of the outer rotating arm 419 is formed with a bayonet 420 in an open manner.

[0031] The outer wall of the rotating block 409 is fixed with a pair of outward extending pins 417 arranged in a horizontal manner and provided with end caps at the outer side ends, the outward extending pins 417 are sleeved with an inner pressing plate 416 and an inner top spring 418, the outer side end of the inner top spring 418 abuts against the end cap of the outward extending pin 417, the inner side end of the inner top spring 418 abuts against the inner pressing plate 416, the inner pressing plate 416 is fixed with a locking screw 415, and the locking screw 415 is arranged in the bayonet 420.

[0032] The vertical hole 411 is movably provided with a locking rod 413 provided with end discs 414 at both ends.

[0033] The protrusions 405 at the same height are rotatably provided with an inner rotating strip 430 through a first pin 431 between each pair of protrusions 405, the inner rotating strip 430 is fixed with a pair of outward extending swing rods 428, the outward extending swing rods 428 are sleeved with an outer rotating strip 427, the outward extending swing rods 428 are sleeved with a spreading spring 432, the spreading spring 432 is located between the outer rotating strip 427 and the inner rotating strip 430, the other end of the outward extending swing rod 428 is provided with a limiting cap 429, the two ends of the outer rotating strip 427 are rotatably provided with swing legs 423 in a V-shaped structure through a second pin 426, the other end of the swing leg 423 is rotatably provided with a blanking wheel 425 through a fourth shaft 424, the blanking wheel 425 is located outside the swing leg 423, the swing leg 423 is located outside the protrusion 405, the corner of the swing leg 423 is rotatably provided with a fifth shaft 422, the fifth shaft 422 is fixed with a concave seat 421, and the concave seat 421 is welded on the outer wall of the outer vertical plate 406 and the inner vertical plate 404.

[0034] When the embodiment is operated, the following steps are performed: Step 01, the operator shifts the receiving plate 200 to the base 1.

[0035] Before moving, the operator will set the L-shaped plate 203 on the four sides of the receiving plate 200, and then press the pressing pin 211 downward. When the pressing pin 211 moves downward, the upper pull plate 214 will be below the insertion rod 215, and then move the movable sleeve 208 inward to make the movable sleeve 208 in the strip-shaped hole 202 and the clamping groove 205, and then cancel the pressing of the pressing pin 211. After that, the upper pull plate 214 will be set on the insertion rod 215 under the elastic force of the spring 212. In this way, the locking effect of the movable sleeve 208 on the limiting piece 206 is ensured.

[0036] When moving, it is necessary to ensure that the convex plate 219 is at the front end of the forward direction, and then the operator pushes the receiving plate 200 to the base 1. When entering, the rollers 217 on the same side are located between the limiting side plate 10 and the vertical plate 216.

[0037] After moving, the inner side of the vertical plate 216 abuts against the end baffle 11, and the inclined surface of the supporting plate 220 acts on the stop rod 313 during the inward movement of the bearing plate 200, so that the stop rod 313 moves upward. During the upward movement of the stop rod 313, the compression spring 304 is compressed, and the supporting plate 220 is located on the inner side of the stop rod 313. At this time, due to the downward pressing action of the compression spring 304, the outer periphery of the stop rod 313 abuts against the vertical surface of the supporting plate 220. At this time, the limiting effect of the receiving plate 200 is completed.

[0038] Step 02, move each locking rod 413 upward to make the locking rod 413 move out of the clamping hole 420, and then rotate the outer vertical plate 406 downward and make the outer vertical plate 406 in a vertical state, and at this time the outer rotating arm 419 is in a horizontal state. Before rotating to the position, the locking screw 415 needs to be pulled outward, and during the pulling process, the inner top spring 418 is compressed. When the outer rotating arm 419 is rotated to the position, the outer pulling force of the locking screw 415 is released to make the locking screw 415 clamped in the clamping hole 420. In this way, the state of the outer vertical plate 406 is ensured, and the paperboard can be prevented from tilting when the paperboard falls through the outer vertical plate.

[0039] Step 03, the cut paperboard is pushed to the upper end of the rectangular frame 402 by the conveying belt, and then the paperboard moves to the unloading wheel 425 on the pairs of swing legs 423 on the top layer in the rectangular frame 402. When there are multiple paperboards on the pairs of swing legs 423 on the top layer, the swing legs 423 will be rotated outward due to the action of the gravity of the paperboard, and the opening spring 432 will be compressed during the rotation, and the unloading wheel 425 will be moved away from the lower side of the paperboard. Then the paperboard moves downward to the pairs of swing legs 423 on the lower layer, and the paperboard falls to the receiving plate 200. Such operation is continued until the receiving plate 200 is placed with a sufficient number of paperboards, i.e. the paperboards are stacked to the height of the limiting piece 206.

[0040] Step 04, the operator turns the connecting rod 310 downward, which will make the movable arm 307 turn upward, and when the movable arm 307 turns, the top rod 314 will act on the transverse hole 308, thereby making the blocking rod 313 move above the supporting plate 220, and then turn the positioning rotating plate 316 downward, and then clamp the connecting rod 310 in the positioning groove 317.

[0041] Step 05, the operator moves the receiving plate 200 and the stacked paperboard outward, which can be transferred by a forklift during the movement, and then the paperboard is transferred to a bundling device to perform a bundling operation on the paperboard, and the bundling belt is arranged in the concave strip 201.

[0042] Step 06, each limiting piece 206 is disassembled, and the receiving plate 200 is transferred to the base 1 again, and the stacking operation of the paperboard is performed again.

[0043] The above description is only the preferred embodiment of the present application, and is not intended to limit the present application. Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A cardboard stacking device, characterized in that, Includes a base (1), a receiving part (2) on the base (1), a locking part (3) at one end of the base (1), and a feeding part (4) on the base (1). The receiving part (2) includes a receiving plate (200), and an L-shaped plate (203) is provided around the receiving plate (200). The L-shaped plate (203) is bent to form an upper clamping plate (204). A limiting member (206) is formed on the inner end of the upper clamping plate (204). A pair of protruding plates (219) are formed on one end of the receiving plate (200), and support plates (220) are formed on both sides of the protruding plates (219). The interlocking part (3) has a movable stop bar (313) for limiting the support plate (220); The unloading section (4) includes a rectangular frame (402) located above the base (1). The rectangular frame (402) is formed with multiple pairs of clearance grooves (403) so that an inner vertical plate (404) is formed around the rectangular frame (402). An outer vertical plate (406) is provided directly below the inner vertical plate (404). Multiple pairs of protrusions (405) are formed on both sides of the outer vertical plate (406) and the inner vertical plate (404). An inner rotating bar (430) is rotatably provided between each pair of protrusions (405) located at the same height. An outwardly extending swing arm is fixed on the inner rotating bar (430). The rod (428) has an outer rotating bar (427) sleeved on the extended swing rod (428) and an opening spring (432) sleeved on the extended swing rod (428). The opening spring (432) is located between the outer rotating bar (427) and the inner rotating bar (430). The two ends of the outer rotating bar (427) are respectively provided with swing legs (423). The swing legs (423) are provided with a fifth shaft (422). A concave seat (421) is fixed on the fifth shaft (422). The concave seat (421) is welded to the outer wall of the outer vertical plate (406) or the inner vertical plate (404).

2. The cardboard palletizing device according to claim 1, characterized in that, The receiving plate (200) has a rectangular structure, and multiple concave strips (201) are formed on the receiving plate (200) along its length and width directions.

3. The cardboard palletizing device according to claim 1, characterized in that, The upper plate (204) has slots (205) at both ends, and the receiving plate (200) has four pairs of strip holes (202). A movable sleeve (208) is movably installed in the strip hole (202). The movable sleeve (208) is locked in the slot (205). The upper end of the movable sleeve (208) is fixed with a limiting upper ring (210). The lower end of the limiting upper ring (210) abuts against the upper wall of the upper plate (204). The lower end of the movable sleeve (208) is fixed with a limiting lower ring (213). The limiting lower ring (213) is located on the lower side of the receiving plate (200).

4. The cardboard palletizing device according to claim 3, characterized in that, The movable sleeve (208) is provided with a pressure pin (211) with a head at the upper end. A spring (212) is fitted on the pressure pin (211). The upper end of the spring (212) abuts against the lower end of the pressure pin (211), and the lower end of the spring (212) abuts against the upper end of the limiting upper ring (210). An upper pull plate (214) is fixed to the lower end of the pressure pin (211). The upper pull plate (214) is located below the limiting lower ring (213). A plug rod (215) is inserted into the other end of the upper pull plate (214). The upper end of the plug rod (215) is welded to the lower wall of the receiving plate (200).

5. The cardboard palletizing device according to claim 1, characterized in that, The interlocking part (3) includes a lower strip (300) fixed to one end of the base (1). The two ends of the lower strip (300) are respectively welded with end rods (301). The upper end of the end rod (301) is welded with an upper strip (302). A vertical rod (303) is fixed on the upper strip (302) and the lower strip (300). A movable strip (306) is movably provided on the vertical rod (303). A downward pressure spring (304) is sleeved on the vertical rod (303). The upper end of the downward pressure spring (304) abuts against the upper strip (302), and the lower end of the downward pressure spring (304) abuts against the movable strip (306). Movable arms (307) are bent at both ends of the movable strip (306). A stop rod (313) is rotatably provided at the other end of the movable arm (307).

6. The cardboard palletizing device according to claim 5, characterized in that, A transverse hole (308) is provided on the movable arm (307), and a first shaft (311) is rotatably provided on the end rod (301). An inner rotating plate (312) is fixed to the inner end of the first shaft (311). The inner rotating plate (312) is located inside the end rod (301). A top rod (314) is fixed to the other end of the inner rotating plate (312). The top rod (314) passes through the transverse hole (308) on its side. An outer rotating plate (309) is fixed to the outer end of the first shaft (311). The outer rotating plate (309) is located outside the end rod (301). The other end of the outer rotating plate (309) is fixed with a connecting rod (310). The two ends of the connecting rod (310) protrude from the outside of the outer rotating plate (309). The upper end of the end rod (301) is provided with a positioning rotating plate (316) through the second shaft (315). The other end of the positioning rotating plate (316) is formed with a positioning groove (317). The two ends of the connecting rod (310) are locked in the positioning groove (317).

7. The cardboard palletizing device according to claim 1, characterized in that, The upper end of the outer vertical plate (406) is bent with lugs (407) on both sides. A third shaft (408) is fixed on the lugs (407). A rotating block (409) is sleeved on the third shaft (408). The inner end of the rotating block (409) is welded to the outer wall of the rectangular frame (402). An outer plate (410) is welded to the outer end of the rotating block (409). A vertical hole (411) is opened on the outer plate (410). A horizontal hole (412) is also opened on the outer plate (410). An outer rotating arm (419) is fixed to the outer end of the third shaft (408). A bayonet (420) is formed on the outer end of the outer rotating arm (419). A pair of extended pins (417) with end caps on their outer ends are fixed on the outer wall of the rotating block (409). An inner pressure plate (416) and an inner top spring (418) are sleeved on the extended pins (417). The outer end of the inner top spring (418) abuts against the end cap of the extended pin (417), and the inner end of the inner top spring (418) abuts against the inner pressure plate (416). A locking screw (415) is fixed on the inner pressure plate (416), and the locking screw (415) passes through the bayonet (420). A locking rod (413) is movably installed inside the vertical hole (411).

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