Automatic stacking device for corrugated cartons

Abstract

The invention relates to the technical field of corrugated carton stacking, in particular to an automatic corrugated carton stacking device which comprises a conveying roller unit, a sliding seat and a right-angle positioning plate, a plurality of adsorption holes are formed in the right-angle opening side wall of the right-angle positioning plate, and the adsorption holes are kidney-shaped through holes extending vertically. The adsorption holes are obliquely and upwards distributed at equal intervals from the bottom of the right-angle positioning plate; each adsorption hole is communicated with a negative pressure cavity in the right-angle positioning plate, a vertical connecting pipe is arranged at the bottom of each negative pressure cavity, each connecting pipe extends to the bottom of the right-angle positioning plate and is connected with a first air suction pipe, a negative pressure generating unit is arranged on the sliding seat, and each first air suction pipe is communicated with the output end of the negative pressure generating unit. According to the technical scheme, suction force is provided through the adsorption holes formed in the right-angle positioning plate, so that the right-angle positioning plate positions one right-angle end of a corrugated carton, and it is guaranteed that the corrugated cartons are arranged in order in the stacking process.

Description

Technical Field

[0001] The invention relates to the technical field of corrugated paper box palletizing, and in particular to an automatic corrugated paper box palletizing device. Background Art

[0002] Corrugated boxes are the most widely used packaging products. Depending on the materials used, there are corrugated boxes, single-layer cardboard boxes, etc. They are usually used as wrapping for goods or as the outer layer of protection for items. In the production process, corrugated boxes are usually used to package and stack products. In this work process, in order to ensure that they can achieve the purpose of moisture-proof, space-saving and convenient transportation, corrugated boxes will be stacked.

[0003] In the existing corrugated cardboard box production process, when the corrugated cardboard boxes are palletized, the corrugated cardboard boxes are stacked in sequence to a certain number and then bundled and transported. The stacking of the corrugated cardboard boxes is usually achieved by blocking the movement of the corrugated cardboard boxes so that the subsequent corrugated cardboard boxes are moved above the previous corrugated cardboard boxes. However, this stacking method can only ensure the alignment of the front ends of the corrugated cardboard boxes, but cannot ensure the alignment of the two sides. Therefore, the corrugated cardboard boxes protruding from the sides may be damaged or the bundling effect may be poor during bundling. Summary of the invention

[0004] In view of the above problems, it is necessary to provide an automatic stacking device for corrugated boxes to solve the problems in the prior art.

[0005] In order to solve the problems of the prior art, the technical solution adopted by the present invention is:

[0006] The invention relates to an automatic stacking device for corrugated cardboard boxes, comprising a conveying roller unit for conveying corrugated cardboard boxes in sequence for stacking, and a sliding seat arranged at one side of the conveying roller unit and moving in a horizontal direction perpendicular to the moving direction of the corrugated cardboard boxes, a vertically extending right-angle positioning plate is fixedly installed on the sliding seat, the sliding seat drives the right-angle positioning plate to move to the moving path of the corrugated cardboard box so that the corrugated cardboard is attached to the right-angle opening side wall of the right-angle positioning plate, a plurality of adsorption holes are arranged on the right-angle opening side wall of the right-angle positioning plate, the adsorption holes are waist-shaped through holes extending vertically, and the adsorption holes are evenly spaced and distributed upward from the bottom of the right-angle positioning plate; each of the adsorption holes is respectively connected to a negative pressure cavity inside the right-angle positioning plate, a vertical connecting pipe is arranged at the bottom of the negative pressure cavity, each connecting pipe extends to the bottom of the right-angle positioning plate and is connected to a first suction pipe, a negative pressure generating unit is arranged on the sliding seat, and each first suction pipe is respectively connected to the output end of the negative pressure generating unit.

[0007] Preferably, the negative pressure generating unit includes two groups of horizontally mounted air boxes and vacuum generators, the air boxes are respectively mounted on the outside of the right-angled sides of the right-angle positioning plate, the air boxes are connected to the output end of the vacuum generator, and the vacuum generator is fixedly mounted on the sliding seat; the air box is separated into a main air cavity with the same number of adsorption holes and auxiliary air cavities located at both ends of the air box by a number of vertical partitions, the main air cavities are arranged in a horizontal direction, and a first connecting hole is provided at the top of each main air cavity, and the main air cavities are connected in sequence to the first suction pipe at the bottom of the right-angle positioning plate through the first connecting hole; a lifting inner box that moves in the vertical direction is slidably installed in the main air cavity, the outer wall of the lifting inner box is in contact with the inner wall of the main air cavity, and a first air hole is provided on the side of the lifting inner box that is in contact with the first connecting hole of the main air cavity, and when the lifting inner box moves up to the first air hole and is in the same straight line with the first connecting hole, the negative pressure in the main air cavity cooperates with the first suction pipe connected to the first connecting hole to make the corresponding negative pressure cavity generate suction.

[0008] Preferably, a vertically extending guide rod is provided on the top of the lifting inner box, and the guide rod extends to the outside of the air box through a guide hole provided on the top of the main air cavity, and a limit head is provided on the top of the guide rod, and a fitting wheel is rotatably installed on the limit head, and the axis of the fitting wheel is horizontally arranged; openings are provided at the bottom of the air box and the lifting inner box, and a horizontally extending outer slide rail is provided on the outside of the air box, and a closed bottom cover is slidably installed on the outer slide rail, and the closed bottom cover fits the bottom opening of the air box and moves along the length direction of the air box, and a second suction pipe is provided on the closed bottom cover, and the second suction pipe is connected to the output end of the vacuum generator; the closed bottom cover is connected to a connecting arm extending vertically upward, and a trapezoidal top block is provided on the top of the connecting arm, and the trapezoidal top block pushes the fitting wheel to move upward.

[0009] Preferably, the straight-line distance between the tops of two adjacent adsorption holes is smaller than the length of the adsorption holes; the length of the closed bottom cover is not less than the sum of the widths of the three main air cavities, and the second air suction pipe is arranged in the middle of the closed bottom cover; the length of the upper bottom of the trapezoidal top block is equal to the horizontal distance between the axes of two adjacent fitting wheels; a second connecting hole connecting the main air cavities on both sides is arranged on the partition, and second air holes are arranged on both sides of the lifting inner box fitting partition, and when the first air hole and the first connecting hole are on the same straight line, the second air hole is connected to the second connecting hole.

[0010] Preferably, an upper sealing plate extending vertically upward is provided on the top of the lifting inner box, and the upper sealing plate is in contact with the partition.

[0011] Preferably, a spring is sleeved on the guide rod, the spring is located in the main air cavity and elastically connects the top of the main air cavity and the top of the lifting inner box, and the elastic force of the spring causes the lifting inner box to move downward.

[0012] Preferably, the air box is provided with a positioning block at the bottom opening of each main air cavity for limiting the downward movement of the lifting inner box.

[0013] Preferably, an air inlet hole is provided at the top of the secondary air cavity.

[0014] Preferably, the longitudinal section of the trapezoidal top block is an isosceles trapezoid, and the lower base of the trapezoidal top block is always located below the first connecting hole; the height of the trapezoidal top block is equal to the straight-line distance between the first air hole and the first connecting hole when the inner box is lifted and fitted with the positioning block; the end of the upper base of the trapezoidal top block away from the moving direction of the closed bottom cover is located directly above the second intake pipe.

[0015] Preferably, a cylindrical gear is rotatably mounted on the sliding seat, and the axis of the cylindrical gear is vertically arranged and located on the external angle bisector of the right-angle positioning plate; a rotating driver for driving the cylindrical gear to rotate is also installed on the sliding seat; a horizontally extending rack is fixedly mounted on the closed bottom cover of each of the negative pressure generating units, and the two racks are respectively meshed and connected with the cylindrical gears, and the two racks are staggered up and down, and the tooth grooves of the two racks are both located on the side of the rack facing the right-angle positioning plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] First, the present invention can ensure that the corrugated paper boxes are neatly stacked by positioning one right-angle end of the corrugated paper box through the right-angle positioning plate, and is suitable for the stacking of corrugated paper boxes of different sizes, with a wide range of applications. The adsorption holes arranged on the right-angle opening side wall of the right-angle positioning plate are distributed at equal intervals from the bottom of the right-angle positioning plate upward, so that the corrugated paper boxes can be stably adsorbed at different heights, so that the corrugated paper boxes will not shake or shift at will after being attached to the right-angle positioning plate, further ensuring the neat arrangement of the corrugated paper boxes during the stacking process.

[0018] Secondly, each negative pressure cavity in the present invention is connected to a main air cavity in the air box through the first suction pipe. Through the cooperation of the closed bottom cover, the second suction pipe, the trapezoidal top block and other structures, the negative pressure generated by the negative pressure generating unit can act on the main air cavity of the air box in turn, and lift the lifting inner box in turn, thereby ensuring that the adsorption holes generate air suction force from bottom to top in turn, which can better ensure the air suction strength at each adsorption hole, making the adsorption and stacking of corrugated cardboard boxes more stable and reliable.

[0019] Thirdly, in the present invention, since the straight-line distance between the top ends of two adjacent adsorption holes is smaller than the length of the adsorption holes, the two adjacent adsorption holes have overlapping parts in height position. By limiting the shape and size of the trapezoidal top block, it is ensured that only two adsorption holes can be activated in sequence to generate suction each time. When the two adjacent adsorption holes generate adsorption force at the same time, the positioning effect of the gradually rising corrugated cardboard can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional automatic stacking device for corrugated paper boxes. Figure 1 ;

[0021] Figure 2 It is a three-dimensional automatic stacking device for corrugated paper boxes. Figure 2 ;

[0022] Figure 3 It is a front view of an automatic palletizing device for corrugated paper boxes with the conveyor roller unit removed;

[0023] Figure 4 yes Figure 3 A cross-sectional view at AA of FIG.

[0024] Figure 5 yes Figure 4 A three-dimensional cross-sectional view of

[0025] Figure 6 yes Figure 5 A partial enlarged view of point B;

[0026] Figure 7 yes Figure 3 A cross-sectional view of the section at CC;

[0027] Figure 8 yes Figure 7 A partial enlarged view of point D;

[0028] Fig. 9 It is a three-dimensional automatic stacking device for corrugated paper boxes without the conveyor roller unit. Figure 1 ;

[0029] Fig.10 yes Fig. 9 A local enlarged view of point E;

[0030] Fig.11 It is a three-dimensional automatic stacking device for corrugated paper boxes without the conveyor roller unit. Figure 2 ;

[0031] Fig.12 yes Fig.11 A partial enlarged view of point F.

[0032] The numbers in the figure are: 1, conveying roller unit; 2, sliding seat; 21, cylindrical gear; 22, rotary drive; 3, right-angle positioning plate; 31, adsorption hole; 311, negative pressure chamber; 312, connecting pipe; 313, first suction pipe; 4, negative pressure generating unit; 41, air box; 411, partition; 412, main air chamber; 413, auxiliary air chamber; 414, first connecting hole; 415, guide hole; 416, second connecting hole hole; 417, positioning block; 418, air inlet; 42, vacuum generator; 43, lifting inner box; 431, first air hole; 432, guide rod; 433, limit head; 434, fitting wheel; 435, second air hole; 436, spring; 437, upper blocking plate; 44, outer slide rail; 45, closed bottom cover; 451, second suction pipe; 452, connecting arm; 453, trapezoidal top block; 454, rack. DETAILED DESCRIPTION

[0033] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] Reference Figures 1 to 12 :

[0035] A corrugated paper box automatic stacking device comprises a conveying roller unit 1 for conveying corrugated paper boxes in sequence for stacking, and a sliding seat 2 arranged on one side of the conveying roller unit 1 and moving in a horizontal direction perpendicular to the moving direction of the corrugated paper box, a vertically extending right-angle positioning plate 3 is fixedly installed on the sliding seat 2, the sliding seat 2 drives the right-angle positioning plate 3 to move to the moving path of the corrugated paper box so that the corrugated paper board is attached to the right-angle opening side wall of the right-angle positioning plate 3, and a plurality of adsorption holes are arranged on the right-angle opening side wall of the right-angle positioning plate 3 31, the adsorption holes 31 are waist-shaped through holes extending vertically, and the adsorption holes 31 are evenly spaced and distributed obliquely upward from the bottom of the right-angle positioning plate 3; each adsorption hole 31 is respectively connected to a negative pressure chamber 311 inside the right-angle positioning plate 3, and a vertical connecting pipe 312 is arranged at the bottom of the negative pressure chamber 311, each connecting pipe 312 extends to the bottom of the right-angle positioning plate 3 and is connected to a first suction pipe 313, a negative pressure generating unit 4 is arranged on the sliding seat 2, and each first suction pipe 313 is respectively connected to the output end of the negative pressure generating unit 4.

[0036] When the stacking device of the present invention is in use, the conveying roller unit 1 conveys the corrugated paper box to the stacking position in sequence, and the sliding seat 2 can be connected to a cylinder or an electric push rod to realize horizontal movement in a direction perpendicular to the moving direction of the corrugated paper box, driving the right-angle positioning plate 3 to move to the moving path of the corrugated paper box. The negative pressure generating unit 4 applies negative pressure to the negative pressure chamber 311 through the first suction pipe 313, so that the adsorption hole 31 on the right-angle positioning plate 3 generates suction. When the corrugated paperboard fits the right-angle opening side wall of the right-angle positioning plate 3, the adsorption hole 31 starts to adsorb the corrugated paper box, so that the corrugated paper box moves toward the right-angle opening side wall of the right-angle positioning plate 3 until the side of the corrugated paper box is completely fitted with the right-angle opening side wall of the right-angle positioning plate 3, thereby ensuring the neatness of the stacking. The adsorption holes 31 on the right-angle positioning plate 3 are waist-shaped through holes extending vertically and distributed at equal intervals inclined upward, so that it can be ensured that as the corrugated boxes are stacked, the gradually rising corrugated boxes can still be positioned by adsorption of the adsorption holes 31. The connecting pipe 312 at the bottom of the negative pressure chamber 311 extends to the bottom of the right-angle positioning plate 3 to connect the first suction pipe 313, thereby ensuring that the adsorption holes 31 at different heights can generate suction on the side of the corrugated box. After the stacking is completed, the negative pressure generating unit 4 stops working, and the sliding seat 2 can drive the right-angle positioning plate 3 to move away from the moving path of the corrugated box, so that the conveying roller unit 1 can drive the neatly stacked corrugated box to continue to move. In this embodiment, the right-angle positioning plate 3 is used to position one right-angle end of the corrugated box to ensure that the stacking of the corrugated boxes is neat, which is suitable for the stacking of corrugated boxes of different sizes and has a wide range of applications. A plurality of adsorption holes 31 are arranged on the right-angle opening side wall of the right-angle positioning plate 3, and cooperate with the negative pressure generating unit 4 to generate air suction to adsorb the corrugated paper box. The adsorption holes 31 are waist-shaped through holes extending vertically and are evenly spaced from the bottom of the right-angle positioning plate 3 upward, so that the corrugated paper box can be stably adsorbed at different heights, so that the corrugated paper box will not shake or shift at will after being attached to the right-angle positioning plate 3, further ensuring the neat arrangement of the corrugated paper boxes during the stacking process.

[0037] In order to ensure that the negative pressure generating unit 4 can provide air suction to the adsorption holes 31 from bottom to top in sequence, thereby ensuring the air suction strength at the adsorption holes 31, the following features are specifically set:

[0038] The negative pressure generating unit 4 includes two groups of horizontally mounted air boxes 41 and vacuum generators 42. The air boxes 41 are respectively mounted on the outer sides of the right-angled sides of the right-angled positioning plate 3. The air boxes 41 are connected to the output end of the vacuum generator 42. The vacuum generator 42 is fixedly mounted on the sliding seat 2. The air box 41 is separated into main air cavities 412 with the same number of adsorption holes 31 by a plurality of vertical partitions 411, and auxiliary air cavities 413 located at both ends of the air box 41. The main air cavities 412 are arranged in the horizontal direction. A first connecting hole 414 is arranged at the top of each main air cavity 412. The main air cavity 412 is connected to the auxiliary air cavity 413 through the first connecting hole 414. The through holes 414 are connected in sequence to the first air suction pipe 313 at the bottom of the right-angle positioning plate 3; a lifting inner box 43 that moves in the vertical direction is slidably installed in the main air cavity 412, and the outer wall of the lifting inner box 43 fits into the inner wall of the main air cavity 412, and a first air hole 431 is provided on the side of the lifting inner box 43 that fits into the main air cavity 412 and where the first connecting hole 414 is provided. When the lifting inner box 43 moves up until the first air hole 431 is in the same straight line with the first connecting hole 414, the negative pressure in the main air cavity 412 cooperates with the first air suction pipe 313 connected to the first connecting hole 414 to generate suction in the corresponding negative pressure cavity 311.

[0039] When the vacuum generator 42 in this embodiment is started to generate negative pressure, the negative pressure is transmitted to the two air boxes 41 on both sides of the right-angle positioning plate 3. A number of vertical partitions 411 in the air box 41 separate it into a main air cavity 412 with the same number as the adsorption holes 31 and auxiliary air cavities 413 at both ends. In the initial state, the lifting inner box 43 is located at the bottom of the main air cavity 412, the first air hole 431 is not aligned with the first connecting hole 414, the main air cavity 412 is not connected with the first suction pipe 313, and there is no suction at the adsorption hole 31. When it is necessary to adsorb the corrugated cardboard box, the lifting inner box 43 in the main air cavity 412 connected to the negative pressure cavity 311 of the lowest adsorption hole 31 moves up, and the first air hole 431 on the lifting inner box 43 is firstly in the same straight line with the first connecting hole 414. At this time, the negative pressure in the main air cavity 412 is transmitted to the corresponding negative pressure cavity 311 through the first connecting hole 414 and the first suction pipe 313, so that the lowest adsorption hole 31 generates suction, adsorbs the corrugated cardboard box at the bottom, and positions it. As the number of corrugated cardboard boxes increases, the lifting inner boxes 43 in the main air cavity 412 at different positions are moved up in turn, so that the first air hole 431 is aligned with the first connecting hole 414, and each adsorption hole 31 generates suction in order from bottom to top, so that the corrugated cardboard box is gradually adsorbed and fixed on the right-angle positioning plate 3. This embodiment, by arranging the main air cavity 412 and the lifting inner box 43 in the air box 41, enables the negative pressure to act on the adsorption holes 31 from bottom to top in sequence, avoiding the problem of suction dispersion that may occur when multiple adsorption holes 31 are simultaneously inhaling air, ensuring that each adsorption hole 31 can obtain sufficient air suction strength, so as to more firmly adsorb the corrugated paper box. The connection sequence between the main air cavity 412 and the first suction pipe 313 is controlled by the lifting of the lifting inner box 43, realizing the precise control of the adsorption sequence of the adsorption holes 31, ensuring that the adsorption starts from the bottom of the corrugated paper box in sequence, which helps to better fix the corrugated paper box.

[0040] In order to achieve the purpose that the negative pressure generated by the negative pressure generating unit 4 can sequentially act on the main air cavity 412 of the air box 41 and sequentially lift the lifting inner box 43 in the main air cavity 412, the following features are specifically set:

[0041] A vertically extending guide rod 432 is provided at the top of the lifting inner box 43, and the guide rod 432 extends to the outside of the air box 41 through the guide hole 415 provided at the top of the main air cavity 412, and a limit head 433 is provided at the top of the guide rod 432, and a fitting wheel 434 is rotatably installed on the limit head 433, and the axis of the fitting wheel 434 is horizontally arranged; the air box 41 and the lifting inner box 43 are provided with openings at the bottom, and a horizontally extending outer slide rail 44 is provided on the outside of the air box 41, and a closed bottom cover 45 is slidably installed on the outer slide rail 44, and the closed bottom cover 45 fits the bottom opening of the air box 41 and moves along the length direction of the air box 41, and a second suction pipe 451 is provided on the closed bottom cover 45, and the second suction pipe 451 is connected to the output end of the vacuum generator 42; the closed bottom cover 45 is connected to a connecting arm 452 extending vertically upward, and a trapezoidal top block 453 is provided on the top of the connecting arm 452, and the trapezoidal top block 453 pushes the fitting wheel 434 to move upward.

[0042] When the second air suction pipe 451 of the closed bottom cover 45 in this embodiment is located at the secondary air cavity 413 at one end of the bottom opening of the air box 41, the lifting inner box 43 in each main air cavity 412 is in a lower position, the first air hole 431 is not aligned with the first connecting hole 414, the negative pressure has not been transmitted to the negative pressure cavity 311 through the main air cavity 412, and the adsorption hole 31 does not generate suction. When the closed bottom cover 45 moves to the main air cavity 412 connected to the adsorption hole 31 at the lowest end of the right-angle positioning plate 3, the closed bottom cover 45 closes the bottom opening of the main air cavity 412, and as the closed bottom cover 45 moves, the trapezoidal top block 453 at the top of the connecting arm 452 contacts the fitting wheel 434, which pushes the fitting wheel 434 to move upward, thereby driving the guide rod 432 and the lifting inner box 43 to move vertically upward in the main air cavity 412. When the lifting inner box 43 moves up to the point where the first air hole 431 and the first connecting hole 414 are in the same straight line, the negative pressure in the main air cavity 412 generates suction force in the corresponding negative pressure cavity 311 through the first connecting hole 414 and the first suction pipe 313, and then generates air suction force in the adsorption hole 31 to adsorb the corrugated paper box. Since the trapezoidal top block 453 pushes each fitting wheel 434 in sequence as the closed bottom cover 45 moves, the negative pressure will act on the main air cavity 412 of the air box 41 in sequence, and lift the lifting inner box 43 in each main air cavity 412 in sequence, so that the adsorption hole 31 generates air suction force in sequence from bottom to top.

[0043] In order to enable two adjacent adsorption holes 31 to maintain adsorption force at the same time so as to avoid ensuring complete adsorption of corrugated cardboards at different heights, the following features are specifically set:

[0044] The straight-line distance between the tops of two adjacent adsorption holes 31 is less than the length of the adsorption holes 31; the length of the closed bottom cover 45 is not less than the sum of the widths of the three main air cavities 412, and the second suction pipe 451 is arranged in the middle of the closed bottom cover 45; the length of the upper bottom of the trapezoidal top block 453 is equal to the horizontal distance between the axes of two adjacent fitting wheels 434; the partition 411 is provided with a second connecting hole 416 connecting the main air cavities 412 on both sides, and the lifting inner box 43 is fitted with second air holes 435 on both sides of the partition 411, and when the first air hole 431 and the first connecting hole 414 are on the same straight line, the second air hole 435 is connected with the second connecting hole 416.

[0045] In this embodiment, since the length of the closed bottom cover 45 is not less than the sum of the widths of the three main air cavities 412, the second air suction pipe 451 is arranged in the middle of the closed bottom cover 45, so the closed bottom cover 45 can simultaneously block the bottom openings of the adjacent multiple main air cavities 412, and since the length of the upper bottom of the trapezoidal top block 453 is equal to the horizontal distance between the axes of the two adjacent fitting wheels 434, the trapezoidal top block 453 can simultaneously push the lifting inner box 43 in the two adjacent main air cavities 412 to move upward. The plate 411 is provided with a second connecting hole 416 connecting the main air chambers 412 on both sides, and the lifting inner box 43 is provided with second air holes 435 on both sides of the partition 411. When the lifting inner box 43 of a main air chamber 412 rises to connect the first air hole 431 with the first connecting hole 414, the second air hole 435 will also connect with the second connecting hole 416, so that the negative pressure can be transmitted to the adjacent main air chamber 412, so that the adjacent adsorption holes 31 generate suction force in sequence, and realize sequential adsorption from bottom to top. Since the straight-line distance between the tops of the two adjacent adsorption holes 31 is less than the length of the adsorption holes 31, the two adjacent adsorption holes 31 have overlapping parts in height position, and when the two adjacent adsorption holes 31 generate adsorption force at the same time, the positioning effect of the gradually rising corrugated cardboard can be guaranteed.

[0046] In order to automatically block the second communication hole 416 when the lifting inner box 43 is at a low position, the following features are specifically provided:

[0047] An upper blocking plate 437 extending vertically upward is provided on the top of the lifting inner box 43 , and the upper blocking plate 437 is in contact with the partition plate 411 .

[0048] In this embodiment, when the lifting inner box 43 is at a low position, the upper blocking plate 437 is attached to the partition plate 411 to block the second connecting hole 416. This ensures that the negative pressure can be transmitted in the main air cavity 412 after the lifting inner box 43 is lifted. When the negative pressure acts on the two main air cavities 412, only the corresponding two adjacent adsorption holes 31 generate suction, and then generate suction in sequence.

[0049] In order to achieve the purpose that after the trapezoidal top block 453 moves away from the fitting rotating wheel 434, the lifting inner box 43 connected to the fitting rotating wheel 434 can be quickly moved downward, the following features are specifically set:

[0050] A spring 436 is sleeved on the guide rod 432. The spring 436 is located in the main air cavity 412 and elastically connects the top of the main air cavity 412 and the top of the lifting inner box 43. The elastic force of the spring 436 causes the lifting inner box 43 to move downward.

[0051] In this embodiment, when the upper bottom of the trapezoidal top block 453 moves away from the fitting rotating wheel 434, the spring 436 moves the lifting inner box 43 downward under the elastic force. The elastic force of the spring 436 enables the lifting inner box 43 to quickly return to the initial position, ready for the next adsorption process.

[0052] In order to prevent the lifting inner box 43 from being separated from the main air cavity 412, the following features are specifically provided:

[0053] A positioning block 417 for limiting the downward movement of the lifting inner box 43 is provided at the bottom opening of each main air cavity 412 of the air box 41.

[0054] In this embodiment, the air box 41 is provided with a positioning block 417 at the bottom opening of the main air cavity 412 to limit the downward movement of the lifting inner box 43. When the lifting inner box 43 moves downward, the positioning block 417 prevents it from leaving the main air cavity 412, thereby ensuring the stability and reliability of the device.

[0055] When the second air suction pipe 451 is located in the auxiliary air cavity 413, all the adsorption holes 31 have no adsorption force. In order to avoid a large negative pressure in the auxiliary air cavity 413, the following features are specifically set:

[0056] An air inlet hole 418 is provided at the top of the secondary air cavity 413 .

[0057] In this embodiment, an air inlet hole 418 is set on the top of the auxiliary air cavity 413. When the second air intake pipe 451 is located in the auxiliary air cavity 413, external air can enter the auxiliary air cavity 413 through the air inlet hole 418 to balance the negative pressure in the auxiliary air cavity 413, thereby avoiding unnecessary suction in the adsorption hole 31 due to excessive negative pressure.

[0058] In order to ensure that the trapezoidal top block 453 can only lift the fitting wheels 434 at the top of the two lifting inner boxes 43 at the same time, the following features are specifically set:

[0059] The longitudinal section of the trapezoidal top block 453 is an isosceles trapezoid, and the lower base of the trapezoidal top block 453 is always located below the first connecting hole 414; the height of the trapezoidal top block 453 is equal to the straight-line distance between the first air hole 431 and the first connecting hole 414 when the lifting inner box 43 is attached to the positioning block 417; the end of the upper base of the trapezoidal top block 453 away from the moving direction of the closed bottom cover 45 is located directly above the second suction pipe 451.

[0060] In this embodiment, as the closed bottom cover 45 moves, the trapezoidal top block 453 contacts the fitting wheel 434 at the top of the first lifting inner box 43. Since the trapezoidal top block 453 is an isosceles trapezoid, its hypotenuse gradually pushes the fitting wheel 434 upward, causing the corresponding lifting inner box 43 to rise. Since the height of the trapezoidal top block 453 is equal to the straight-line distance between the first air hole 431 and the first connecting hole 414 when the lifting inner box 43 fits the positioning block 417, when the fitting wheel 434 is located at the upper bottom of the trapezoidal top block 453, the first air hole 431 is aligned with the first connecting hole 414, and the negative pressure of the main air cavity 412 is transmitted to the adsorption hole 31, generating suction. Since the end of the upper bottom of the trapezoidal top block 453 away from the moving direction of the closed bottom cover 45 is located directly above the second suction pipe 451, when the second suction pipe 451 is located at the opening below the previous main air cavity 412, the closed bottom cover 45 also blocks the opening below the next main air cavity 412, and the upper bottom ends of the trapezoidal top block 453 are located below the fitting wheel 434 at the top of the lifting inner box 43 of the two main air cavities 412. This embodiment limits the shape and size of the trapezoidal top block 453 to ensure that only two suction holes 31 can be activated in sequence to generate suction each time, avoiding problems such as uneven suction and positioning deviation of corrugated paper boxes caused by the simultaneous action of multiple suction holes 31, so that the corrugated paper boxes are more evenly stressed and more accurately positioned during the stacking process, thereby improving the neatness of the stacking.

[0061] In order to make the closed bottom covers 45 on the air boxes 41 on both sides of the right-angle positioning plate 3 move synchronously, the following features are specifically set:

[0062] A cylindrical gear 21 is rotatably mounted on the sliding seat 2, and the axis of the cylindrical gear 21 is vertically arranged and located on the bisector of the outer angle of the right-angle positioning plate 3; a rotating driver 22 for driving the cylindrical gear 21 to rotate is also installed on the sliding seat 2; a horizontally extending rack 454 is fixedly mounted on the closed bottom cover 45 of each negative pressure generating unit 4, and the two racks 454 are respectively meshed and connected with the cylindrical gear 21, and the two racks 454 are staggered up and down, and the tooth grooves of the two racks 454 are both located on the side of the rack 454 facing the right-angle positioning plate 3.

[0063] In this embodiment, when the corrugated box needs to be adsorbed and positioned, the rotary driver 22 is started, which can be a servo motor, and drives the cylindrical gear 21 to start rotating. Since the closed bottom covers 45 of the two negative pressure generating units 4 are respectively fixed with horizontally extending racks 454, and the two racks 454 are meshed with the cylindrical gear 21, and the two racks 454 are staggered up and down, and the tooth grooves are both located on the side facing the right-angle positioning plate 3, when the cylindrical gear 21 rotates, the two racks 454 are driven to move synchronously with their respective closed bottom covers 45, and the adsorption holes 31 with suction force on both sides of the right-angle positioning plate 3 are adjusted synchronously.

[0064] Working principle: When in use, the conveying roller unit 1 conveys the corrugated cardboard boxes to the stacking position in sequence, and the sliding seat 2 moves in a horizontal direction perpendicular to the moving direction of the corrugated cardboard boxes, driving the right-angle positioning plate 3 to move to the moving path of the corrugated cardboard boxes. When the corrugated cardboard fits the right-angle opening side wall of the right-angle positioning plate 3, the adsorption hole 31 starts to adsorb the corrugated cardboard box, so that the corrugated cardboard box moves toward the right-angle opening side wall of the right-angle positioning plate 3 until the side of the corrugated cardboard box is completely fitted with the right-angle opening side wall of the right-angle positioning plate 3, thereby ensuring the neatness of the stacking. When the corrugated cardboard box needs to be adsorbed and positioned, the rotary driver 22 is started, and when the cylindrical gear 21 rotates, the two racks 454 are driven to move synchronously with their respective closed bottom covers 45. As the closed bottom covers 45 move, suction is generated in turn in the adsorption holes 31 from bottom to top. The adsorption strength of the adsorption holes 31 is ensured according to the stacking height of the corrugated cardboard boxes. After stacking, the negative pressure generating unit 4 stops working, and the sliding seat 2 can drive the right-angle positioning plate 3 to move out of the moving path of the corrugated cardboard box, and the conveying roller unit 1 can drive the neatly stacked corrugated cardboard boxes to continue to move.

[0065] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An automatic stacking device for corrugated paper boxes, comprising a conveying roller unit (1) for conveying corrugated paper boxes in sequence for stacking, and a sliding seat (2) arranged on one side of the conveying roller unit (1) and moving in a horizontal direction perpendicular to the moving direction of the corrugated paper boxes, a right-angle positioning plate (3) extending vertically fixedly mounted on the sliding seat (2), the sliding seat (2) driving the right-angle positioning plate (3) to move to the moving path of the corrugated paper box so that the corrugated paper board is attached to the right-angle opening side wall of the right-angle positioning plate (3), characterized in that: A plurality of adsorption holes (31) are arranged on the right-angle opening side wall of the right-angle positioning plate (3), the adsorption holes (31) being waist-shaped through holes extending vertically, and the adsorption holes (31) are evenly spaced and distributed obliquely upward from the bottom of the right-angle positioning plate (3); Each of the adsorption holes (31) is respectively connected to a negative pressure chamber (311) inside the right-angle positioning plate (3); a vertical connecting pipe (312) is provided at the bottom of the negative pressure chamber (311); each connecting pipe (312) extends to the bottom of the right-angle positioning plate (3) and is connected to a first suction pipe (313); a negative pressure generating unit (4) is provided on the sliding seat (2); each first suction pipe (313) is respectively connected to the output end of the negative pressure generating unit (4).

2. The automatic palletizing device for corrugated paper boxes according to claim 1, characterized in that: The negative pressure generating unit (4) comprises two sets of horizontally mounted air boxes (41) and vacuum generators (42), the air boxes (41) being respectively mounted on the outer sides of the right-angled sides of the right-angled positioning plate (3), the air boxes (41) being connected to the output end of the vacuum generator (42), and the vacuum generator (42) being fixedly mounted on the sliding seat (2); A plurality of vertical partitions (411) are used to separate the main air chambers (412) having the same number of adsorption holes (31) and the auxiliary air chambers (413) located at both ends of the air chamber (41), the main air chambers (412) are arranged in a horizontal direction, a first connecting hole (414) is provided at the top of each main air chamber (412), and the main air chambers (412) are sequentially connected to the first air suction pipes (313) at the bottom of the right-angle positioning plate (3) through the first connecting holes (414); A lifting inner box (43) that moves in a vertical direction is slidably installed in the main air cavity (412), and the outer wall of the lifting inner box (43) fits the inner wall of the main air cavity (412). The lifting inner box (43) is fitted with a first air hole (431) on one side of the main air cavity (412) where the first connecting hole (414) is provided. When the lifting inner box (43) moves up until the first air hole (431) and the first connecting hole (414) are in the same straight line, the negative pressure in the main air cavity (412) cooperates with the first suction pipe (313) connected to the first connecting hole (414) to generate suction in the corresponding negative pressure cavity (311).

3. The automatic palletizing device for corrugated paper boxes according to claim 2, characterized in that: A vertically extending guide rod (432) is arranged at the top of the lifting inner box (43), and the guide rod (432) passes through a guide hole (415) arranged at the top of the main air cavity (412) and extends to the outside of the air box (41). A limit head (433) is arranged at the top of the guide rod (432), and a fitting wheel (434) is rotatably mounted on the limit head (433), and the axis of the fitting wheel (434) is arranged horizontally; The bottoms of the gas box (41) and the lifting inner box (43) are provided with openings, the outside of the gas box (41) is provided with a horizontally extending outer slide rail (44), a closed bottom cover (45) is slidably mounted on the outer slide rail (44), the closed bottom cover (45) fits the bottom opening of the gas box (41) and moves along the length direction of the gas box (41), a second suction pipe (451) is provided on the closed bottom cover (45), and the second suction pipe (451) is connected to the output end of the vacuum generator (42); The closed bottom cover (45) is connected to a connecting arm (452) extending vertically upwards, and a trapezoidal top block (453) is arranged at the top end of the connecting arm (452). The trapezoidal top block (453) pushes the fitting rotating wheel (434) to move upwards.

4. The automatic palletizing device for corrugated paper boxes according to claim 3 is characterized in that: The straight-line distance between the top ends of two adjacent adsorption holes (31) is smaller than the length of the adsorption holes (31); The length of the closed bottom cover (45) is not less than the sum of the widths of the three main air cavities (412), and the second air intake pipe (451) is arranged in the middle of the closed bottom cover (45); The length of the upper base of the trapezoidal top block (453) is equal to the horizontal distance between the axes of two adjacent fitting wheels (434); The partition (411) is provided with a second connecting hole (416) connecting the main air cavities (412) on both sides, and the lifting inner box (43) is provided with second air holes (435) on both sides of the partition (411) in contact with each other. When the first air hole (431) and the first connecting hole (414) are on the same straight line, the second air hole (435) is connected with the second connecting hole (416).

5. The automatic palletizing device for corrugated paper boxes according to claim 4, characterized in that: An upper sealing plate (437) extending vertically upward is arranged on the top of the lifting inner box (43), and the upper sealing plate (437) is in contact with the partition plate (411).

6. The automatic palletizing device for corrugated paper boxes according to claim 4, characterized in that: The guide rod (432) is sleeved with a spring (436), which is located in the main air cavity (412) and elastically connects the top of the main air cavity (412) and the top of the lifting inner box (43), and the elastic force of the spring (436) causes the lifting inner box (43) to move downward.

7. The automatic palletizing device for corrugated paper boxes according to claim 4, characterized in that: The air box (41) is provided with a positioning block (417) at the bottom opening of each main air cavity (412) for limiting the downward movement of the lifting inner box (43).

8. The automatic palletizing device for corrugated paper boxes according to claim 4, characterized in that: An air inlet hole (418) is provided at the top of the secondary air cavity (413).

9. The automatic stacking device for corrugated paper boxes according to claim 7, characterized in that: The longitudinal section of the trapezoidal top block (453) is an isosceles trapezoid, and the lower base of the trapezoidal top block (453) is always located below the first connecting hole (414); The height of the trapezoidal top block (453) is equal to the straight-line distance between the first air hole (431) and the first connecting hole (414) when the lifting inner box (43) is attached to the positioning block (417); One end of the upper bottom of the trapezoidal top block (453) that is away from the moving direction of the closed bottom cover (45) is located directly above the second air intake pipe (451).

10. The automatic palletizing device for corrugated paper boxes according to claim 4, characterized in that: A cylindrical gear (21) is rotatably mounted on the sliding seat (2), and the axis of the cylindrical gear (21) is vertically arranged and located on the outer angle bisector of the right-angle positioning plate (3); A rotary driver (22) for driving the cylindrical gear (21) to rotate is also mounted on the sliding seat (2); A horizontally extending rack (454) is fixedly mounted on the closed bottom cover (45) of each negative pressure generating unit (4), the two racks (454) are respectively meshed and connected with the cylindrical gear (21), the two racks (454) are arranged alternately up and down, and the tooth grooves of the two racks (454) are both located on the side of the rack (454) facing the right-angle positioning plate (3).

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