CN106809770B

CN106809770B - Automatic turning device with adjustable transverse and longitudinal spacing of pallet fork

Info

Publication number: CN106809770B
Application number: CN201710118448.7A
Authority: CN
Inventors: 常德功; 赵伟琨; 王灿才
Original assignee: Qingdao University of Science and Technology
Current assignee: Dragon Totem Technology Hefei Co ltd
Priority date: 2017-03-01
Filing date: 2017-03-01
Publication date: 2022-08-26
Anticipated expiration: 2037-03-01
Also published as: CN106809770A

Abstract

The invention discloses an automatic turnover device with adjustable transverse and longitudinal spacing of a pallet fork, which comprises: the device comprises a clamping mechanism, a rotating mechanism, a pushing mechanism and a base; the clamping mechanism is connected with the rotating mechanism through a supporting plate, the clamping mechanism is connected with the lifting mechanism through a hydraulic oil cylinder II, and the lifting mechanism is installed on the base; the 180-degree rotation of the clamping mechanism is realized through the rotating mechanism, and the clamping mechanism and the rotating mechanism are turned over around the platform shaft by 90 degrees through the lifting mechanism; the automatic turnover device with the adjustable transverse and longitudinal spacing of the pallet fork has the remarkable advantages of simple and compact structure, high automation level, convenience in operation and the like by controlling the operation through the control system, replaces manpower to turn paper manually, greatly improves the production efficiency, avoids the problems of irregular paper turning and the like, saves labor force and reduces the production cost.

Description

Automatic turnover device with adjustable transverse and longitudinal spacing of pallet fork

Technical Field

The invention relates to a paper pile turning device capable of quickly turning a paper pile by 180 degrees and adjusting the distance between forks, in particular to an automatic turning device with adjustable transverse and longitudinal distances between forks.

Background

With the continuous development and prosperity of society, the paper printing amount of printing factories is increased by times, most of the current printing machines can only perform single-side printing, and then reverse the paper by manpower to perform reverse printing, and because the manual reversing has low efficiency and the phenomenon of missing reversing, the improvement of the reversing efficiency becomes an important aspect of the printing industry. As the turning device of the printing auxiliary equipment, the production efficiency and the product quality can be obviously improved, the service life of the printing machine is prolonged, the management flow can be improved, a large amount of manpower is saved, and especially the equipment with the adjustable fork spacing can meet the turning requirements of printing factories on paper with different specifications, so that the paper pile turning device with the adjustable fork spacing is arranged in a single-sheet paper printing process by printing enterprises, which is a great trend.

Disclosure of Invention

The invention aims to solve the problems and provides a relatively quick turnover scheme aiming at different paper specifications.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

the utility model provides a horizontal longitudinal separation distance adjustable automatic turning device of fork, includes: the clamping mechanism, the rotating mechanism, the pushing mechanism and the base are arranged on the base; the clamping mechanism is connected with the rotating mechanism through a supporting plate, the clamping mechanism is connected with the pushing mechanism through a hydraulic oil cylinder III, and the pushing mechanism is installed on the base.

Further, the clamping mechanism includes: the pallet fork, the platform plate, the slide rail, the hydraulic oil cylinder I, the roller plate I, the clamping rod, the lifting rail, the chain seat I, the chain seat II, the roller plate II, the chain, the hydraulic oil cylinder II, the connecting bar, the middle plate, the chain seat III, the roller I and the roller II; the pallet fork is of a rectangular structure, baffle plates are welded on two sides of the pallet fork, and a pair of pallet forks are arranged face to facilitate clamping of a paper pile; the platform plate and the lifting rail are respectively provided with two pieces, the platform plate and the lifting rail are symmetrically welded into a rectangular structure in pairs, two sets of hydraulic oil cylinders II are arranged, one set of hydraulic oil cylinder II is connected with the pallet fork at the upper end through the connecting lever, and the other set of hydraulic oil cylinder II is connected with the pallet fork at the lower end through the connecting lever; two sets of clamping rods are respectively and symmetrically arranged between the fork pairs and connected with the roller plate I; the number of the slide rails is two, the slide rails are welded on the lifting rail, the roller I is fixed on the roller plate I and is arranged in the slide rails, the bottom of the hydraulic oil cylinder I is fixed between the upper and lower slide rails through the middle plate, the hydraulic oil cylinder I is a double-head oil cylinder, oil cylinder rods of the hydraulic oil cylinder I are respectively connected with the roller plate I, and the clamping rods transversely clamp paper piles of different types and sizes by adjusting the length of the oil cylinder rods at the same time; four sets of the roller plates II are arranged, wherein two sets of the roller plates II are respectively welded with the connecting rods, and the other two sets of the roller plates II are respectively and fixedly connected with the pallet fork in a antisymmetric manner; the roller II is fixed on one side of the roller plate II, the roller II is arranged in the lifting track, the chain seat II is welded on the other side of the roller plate II welded with the connecting rod, the chain seat III is welded on the other side of the roller plate II connected with the fork, and the chain seat I is welded on the platform plate; the chain seat I, the chain seat II and the chain seat III are connected through the chain, so that the pallet fork can move up and down in the lifting track, and the pallet fork can longitudinally clamp paper piles with different types and thicknesses.

Further, the rotation mechanism includes: a supporting plate and a slewing bearing; the layer board with the landing slab with the welding of lift track, slewing bearing passes through the bolt fastening and is in layer board central point puts, slewing bearing adopts the worm gear structure, the worm wheel is the ring gear structure, installs the center of layer board, the worm drive the worm wheel realizes clamping mechanism's 180 rotations, simultaneously the worm wheel the auto-lock performance of worm is guaranteed that clamping mechanism does not revolve, ensures the rotation accuracy.

Further, the lifting mechanism comprises: the device comprises a supporting seat, a platform bearing, a platform shaft, a connecting plate and a hydraulic oil cylinder III; the supporting seat and the hydraulic oil cylinder III are fixed on the base, and the hydraulic oil cylinder III pushes and pulls the connecting plate to enable the clamping mechanism and the rotating mechanism to turn around the platform shaft through the platform bearing.

Further, the base includes: flat steel, square steel, universal wheels; the square steel parallel welding of base bottom surface becomes the rectangle structure, and four shortages the square steel welds into four stand structures, the band steel welds at the top of four stand structures, be equipped with four sets of folding universal wheels under the bottom surface of base, ann has self-locking structure on the universal wheel, realizes convenient removal, the reliable work of whole device.

Furthermore, the clamping rod is of a three-section structure and comprises an upper clamping rod, a middle clamping rod and a lower clamping rod, the middle clamping rod is of a hollow structure, the upper clamping rod and the lower clamping rod are connected with a spring, the clamping rod moves in the sliding rail to transversely clamp the paper stack firstly, the fork then longitudinally clamps the paper stack, and the spring is compressed into a cavity of the middle clamping rod when the upper clamping rod and the lower clamping rod are under the pressure of the fork.

Further, a cylindrical through hole is drilled in the roller plate II, and the roller II is fixed through a bolt, so that rolling friction is realized when the roller plate II moves up and down in the lifting track; the hydraulic oil cylinder II pushes the connecting rod to drive the roller plate II to move, the roller plate II is pulled by the chain to move towards the roller plate II, so that the roller plates II on two sides are stressed uniformly, the roller plate II moves in the lifting track through the roller II, and the longitudinal distance of the fork is adjustable.

Furthermore, the supporting plate of the rotating mechanism is welded on the platform plate and the lifting rail, and the slewing bearing is fixed at the central position of the supporting plate through a bolt, so that the rotating mechanism can bear axial force and longitudinal force; the slewing bearing with the connecting plate welding, the connecting plate has welded the strengthening rib, prevents heavy load deformation, there are two sets of supporting seat, one of them set with the connecting plate links to each other, and the other set with the band steel links to each other, and two sets of supporting seat pass through the platform bearing with the platform axle links together.

Furthermore, a base of the hydraulic oil cylinder III of the lifting mechanism is connected with the bottom of the base through an ear ring and a trunnion structure, an oil cylinder rod of the hydraulic oil cylinder III is connected with the connecting plate through an ear ring and a trunnion structure, and the hydraulic oil cylinder III pushes the connecting plate to realize 90-degree turnover of the clamping mechanism and the rotating mechanism around the platform shaft.

Further, the skeleton of base does the square steel, there is the counter weight structure the afterbody of base, prevents that the structure of whole device warp under the heavy load condition.

Furthermore, the automatic turnover device with the adjustable transverse and longitudinal spacing of the pallet fork further comprises a set of control system, wherein the control system adjusts the rotating speed and the direction of the motor, controls the push-pull actions of the hydraulic oil cylinder I, the hydraulic oil cylinder II and the hydraulic oil cylinder III to be carried out at different speeds and directions, collects motor information and sensor information, and realizes and controls the operation; the control system is provided with an overflow valve to prevent the hydraulic oil cylinder I, the hydraulic oil cylinder II and the hydraulic oil cylinder III from being excessively pushed and pulled to damage a machine and a paper pile.

The invention discloses a test method of an automatic turnover device with adjustable transverse and longitudinal distances of a pallet fork, which comprises the following steps: the foldable universal wheels below the base are unfolded, and the universal wheels are folded after the whole device is moved to a position for turning a paper stack, so that the whole device is stable and reliable; firstly, placing a paper stack on the fork, carrying out counterweight on a counterweight structure at the tail part of the base to prevent the structural deformation of the whole device under the condition of heavy load, adjusting the speed and the direction of the hydraulic oil cylinder III by the control system so as to enable the pushing action to be carried out at different speeds, collecting motor information and sensor information, realizing and controlling the operation, pulling the roller plate I by the hydraulic oil cylinder I to move in the slide rail in opposite directions, driving the clamping rods by the roller plate I to transversely clamp the paper stack, and realizing the transverse adjustment of the spacing between the clamping rods of the clamping mechanism according to the sizes of the paper stacks of different models; the hydraulic oil cylinder II pushes the connecting rod, the connecting rod is connected with the roller plate II, the roller plate II is pulled by the chain to face the roller plate II, so that the fork is driven to move in the opposite direction until the paper stack is longitudinally clamped, and the thickness of the paper stack is turned as required to longitudinally adjust the distance between the forks of the clamping mechanism; starting the hydraulic oil cylinder III to push the clamping mechanism to turn 90 degrees upwards around the platform shaft through the platform bearing and the supporting seat, driving a worm gear through a worm to enable the clamping mechanism to rotate 180 degrees around the slewing bearing as a circle center, starting the hydraulic oil cylinder III again to pull the clamping mechanism to turn 90 degrees downwards, starting the hydraulic oil cylinder II to enable the fork to move in the opposite direction through the connecting rod, and downward placing the paper stack to the ground; and starting the hydraulic oil cylinder I, enabling the clamping rods to move in opposite directions through the roller plate I, releasing the transverse pressing force of the paper stack, taking out the paper stack, and finally automatically turning the paper stack by 180 degrees.

Drawings

FIG. 1: the invention relates to an automatic turnover device with adjustable transverse and longitudinal intervals of a pallet fork, which is disclosed as an axonometric drawing I;

FIG. 2 is a schematic diagram: the invention relates to an axonometric view II of an automatic turnover device with adjustable transverse and longitudinal intervals of a pallet fork;

FIG. 3: the invention relates to an axonometric view of a clamping mechanism of an automatic turnover device with adjustable transverse and longitudinal intervals of a pallet fork;

FIG. 4: the invention relates to an automatic turnover device with adjustable transverse and longitudinal spacing of a pallet fork, which is characterized in that a rotary mechanism is subjected to axonometric drawing;

FIG. 5: the invention relates to a fork transverse and longitudinal distance adjustable automatic turnover device lifting mechanism and a base axonometric drawing;

FIG. 6: the invention relates to a partial side view of a roller plate I of an automatic turnover device with adjustable transverse and longitudinal intervals of a pallet fork;

FIG. 7: the invention relates to a partial side view of a roller plate II of an automatic turnover device with adjustable transverse and longitudinal intervals of a pallet fork;

in the figure: 1-clamping mechanism, 2-rotating mechanism, 3-lifting mechanism, 4-base, 101-pallet fork, 102-platform plate, 103-sliding rail, 104-hydraulic oil cylinder I, 105-roller plate I, 106-clamping rod, 107-lifting rail, 108-chain seat I, 109-chain seat II, 110-roller plate II, 111-chain, 112-hydraulic oil cylinder II, 113-connecting bar, 114-middle plate, 115-chain seat III, 116-roller I, 117-roller II, 201-supporting plate, 202-slewing bearing, 301-supporting seat, 302-platform bearing, 303-platform shaft, 304-connecting plate, 305-hydraulic oil cylinder III, 401-flat steel, 402-square steel and 403-universal wheel.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1, 2, 3, 4, 5, 6, and 7, an automatic turnover device with adjustable transverse and longitudinal distances of forks comprises: the device comprises a clamping mechanism 1, a rotating mechanism 2, a pushing mechanism 3 and a base 4; the clamping mechanism 1 is connected with the rotating mechanism 2 through a supporting plate 201, the clamping mechanism 1 is connected with the pushing mechanism 3 through a hydraulic oil cylinder III305, and the pushing mechanism 3 is installed on the base 4; the clamping mechanism 1 includes: the pallet fork 101, a platform plate 102, a slide rail 103, a hydraulic oil cylinder I104, a roller plate I105, a clamping rod 106, a lifting rail 107, a chain seat I108, a chain seat II109, a roller plate II110, a chain 111, a hydraulic oil cylinder II112, a connecting lever 113, a middle plate 114, a chain seat III115, a roller I116 and a roller II 117; the fork 101 is of a rectangular structure, baffle plates are welded on two sides of the fork 101, and a pair of the fork 101 is installed face to facilitate clamping of a paper stack; the platform plate 102 and the lifting rail 107 are respectively provided with two pieces, the platform plate 102 and the lifting rail 107 are symmetrically welded in pairs to form a rectangular structure, two sets of hydraulic oil cylinders II112 are provided, one set of the hydraulic oil cylinders II112 is connected with the pallet fork 101 at the upper end through the connecting rod 113, and the other set of the hydraulic oil cylinders II112 is connected with the pallet fork 101 at the lower end through the connecting rod 113; two sets of clamping rods 106 are respectively and symmetrically arranged between the pair of the forks 101 and connected with the roller plate I105; the number of the slide rails 103 is two, the slide rails 103 are welded on the lifting rail 107, the rollers I116 are fixed on the roller plates I105, the rollers I116 are arranged in the slide rails 103, the bottoms of the hydraulic oil cylinders I104 are fixed between the upper and lower slide rails 103 through the middle plates 114, the hydraulic oil cylinders I104 are double-headed oil cylinders, oil cylinder rods of the hydraulic oil cylinders I104 are respectively connected with the roller plates I105, and the clamping rods 106 can transversely clamp paper piles of different types and sizes by adjusting the length of the oil cylinder rods; four sets of the roller plates II110 are arranged, wherein two sets of the roller plates II110 are respectively welded with the connecting rod 113, and the other two sets of the roller plates II110 are respectively connected with the fork 101 in a fixed connection in an antisymmetric manner; the roller II117 is fixed on one side of the roller plate II110, the roller II117 is arranged in the lifting rail 107, the chain seat II109 is welded on the other side of the roller plate II110 welded with the connecting rod 113, the chain seat III115 is welded on the other side of the roller plate II110 connected with the fork 101, and the chain seat I108 is welded on the platform plate 102; the chain seat I108, the chain seat II109 and the chain seat III115 are connected through the chain 111, so that the pallet fork 101 can move up and down in the lifting track 107, and the pallet fork 101 can longitudinally clamp paper piles with different types and thicknesses; the rotating mechanism 2 includes: a pallet 201 and a slewing bearing 202; the supporting plate 201 is welded with the platform plate 102 and the lifting track 107, the slewing bearing 202 is fixed at the center of the supporting plate 201 through bolts, the slewing bearing 202 is of a worm gear structure, the worm gear is of a gear ring structure and is installed at the center of the supporting plate 201, the worm drives the worm gear to realize 180-degree rotation of the clamping mechanism 1, and meanwhile, the self-locking performance of the worm gear and the worm ensures that the clamping mechanism 1 does not rotate, so that the rotation precision is ensured; the lifting mechanism 3 includes: a support seat 301, a platform bearing 302, a platform shaft 303, a connecting plate 304 and a hydraulic oil cylinder III 305; the supporting seat 301 and the hydraulic oil cylinder III305 are fixed on the base 4, and the hydraulic oil cylinder III305 pushes and pulls the connecting plate 304, so that the clamping mechanism 1 and the rotating mechanism 2 are turned around the platform shaft 303 through the platform bearing 302; the base 4 includes: flat steel 401, square steel 402, universal wheels 403; the square steel 402 parallel welding of 4 bottom surfaces of base becomes the rectangle structure, and four weak points square steel 402 welds into four-column structure, band steel 401 welds at the top of four-column structure, be equipped with four sets of folding universal wheels 403 under the bottom surface of base 4, ann has auto-lock structure on the universal wheel 403, realizes convenient removal, the reliable work of whole device.

As shown in fig. 1, 2, 3, 4, 5, 6 and 7, the test method of the automatic turnover device with the adjustable transverse and longitudinal distances of the pallet fork comprises the following specific steps: the foldable universal wheel 403 below the base 4 is opened, the whole device is moved to a position for turning the paper stack, and then the universal wheel 403 is folded, so that the whole device is stable and reliable; firstly, a paper stack is placed on the pallet fork 101, a counterweight structure at the tail part of the base 4 is counterweighted, the structural deformation of the whole device under the heavy load condition is prevented, the control system adjusts the speed and the direction of the hydraulic oil cylinder III305, so that the pushing action is carried out at different speeds, motor information and sensor information are collected, the operation is realized and controlled, the hydraulic oil cylinder I104 pulls the roller plate I105 to move in the slide rail 103 in opposite directions, the roller plate I105 drives the clamping rods 106 to transversely clamp the paper stack, and the transverse adjustment of the distance between the clamping rods 106 of the clamping mechanism 1 is realized according to the sizes of paper stacks of different models; the hydraulic oil cylinder II112 pushes the connecting rod 113, the connecting rod 113 is connected with the roller plate II110, the roller plate II110 is pulled by the chain 111 to face the roller plate II110, the pallet forks 101 are driven to move oppositely until the paper stack is longitudinally clamped, and the longitudinal adjustment of the distance between the pallet forks 101 of the clamping mechanism 1 is realized by turning the thickness of the paper stack as required; starting the hydraulic oil cylinder III305 to push the clamping mechanism 1 to upwards turn by 90 degrees around the platform shaft 303 through the platform bearing 302 and the supporting seat 301, driving a worm gear through a worm to enable the clamping mechanism 1 to rotate by 180 degrees around the slewing bearing 202, starting the hydraulic oil cylinder III305 again to pull the clamping mechanism 1 to downwards turn by 90 degrees, starting the hydraulic oil cylinder II112 to enable the pallet fork 101 to move in the opposite direction through the connecting rod 113, and downwards putting the paper stack to the ground; and starting the hydraulic oil cylinder I104, enabling the clamping rod 106 to move in the opposite direction through the roller plate I105, releasing the transverse pressing force of the paper stack, taking out the paper stack, and finally automatically turning the paper stack by 180 degrees.

The above description is intended to be illustrative of the preferred embodiment of the present invention and should not be taken as limiting the invention, but rather, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Claims

1. The utility model provides a horizontal vertical interval adjustable automatic turning device of fork which characterized in that includes: the device comprises a clamping mechanism (1), a rotating mechanism (2), a pushing mechanism (3) and a base (4); the clamping mechanism (1) is connected with the rotating mechanism (2) through a supporting plate (201), the clamping mechanism (1) is connected with the lifting mechanism (3) through a hydraulic oil cylinder III (305), and the lifting mechanism (3) is installed on the base (4); the clamping mechanism (1) comprises: the device comprises a pallet fork (101), a platform plate (102), a slide rail (103), a hydraulic oil cylinder I (104), a roller plate I (105), a clamping rod (106), a lifting track (107), a chain seat I (108), a chain seat II (109), a roller plate II (110), a chain (111), a hydraulic oil cylinder II (112), a connecting lever (113), a middle plate (114), a chain seat III (115), a roller I (116) and a roller II (117); the pallet fork (101) is of a rectangular structure, baffle plates are welded on two sides of the pallet fork (101), and a pair of pallet forks are arranged face to facilitate clamping of a paper pile; the pallet fork lifting device is characterized in that two platform plates (102) and two lifting rails (107) are arranged respectively, the platform plates (102) and the lifting rails (107) are symmetrically welded in pairs to form a rectangular structure, two sets of hydraulic oil cylinders II (112) are arranged, one set of hydraulic oil cylinder II (112) is connected with the pallet fork (101) at the upper end through the connecting lever (113), and the other set of hydraulic oil cylinder II (112) is connected with the pallet fork (101) at the lower end through the connecting lever (113); two sets of clamping rods (106) are respectively and symmetrically arranged between the fork forks (101) and connected with the roller plate I (105); the number of the slide rails (103) is two, the slide rails (103) are welded on the lifting rail (107), the roller I (116) is fixed on the roller plate I (105), the roller I (116) is arranged in the slide rails (103), the bottom of the hydraulic oil cylinder I (104) is fixed between the upper slide rail and the lower slide rail (103) through the middle plate (114), the hydraulic oil cylinder I (104) is a double-head oil cylinder, oil cylinder rods of the hydraulic oil cylinder I (104) are respectively connected with the roller plate I (105), and the clamping rods (106) can transversely clamp paper piles of different types and sizes by adjusting the length of the oil cylinder rods simultaneously; four sets of the roller plates II (110) are arranged, wherein two sets of the roller plates II (110) are respectively welded with the connecting rod (113), and the other two sets of the roller plates II (110) are respectively and fixedly connected with the pallet fork (101) in an antisymmetric manner; the roller II (117) is fixed on one side of the roller plate II (110), the roller II (117) is arranged in the lifting track (107), the chain seat II (109) is welded on the other side of the roller plate II (110) welded with the connecting rod (113), the chain seat III (115) is welded on the other side of the roller plate II (110) connected with the fork (101), and the chain seat I (108) is welded on the platform plate (102); the chain seat I (108), the chain seat II (109) and the chain seat III (115) are connected through a chain (111), so that the pallet fork (101) can move up and down in the lifting track (107), and the pallet fork (101) can longitudinally clamp paper piles with different types and thicknesses; the rotating mechanism (2) comprises: a pallet (201) and a slewing bearing (202); the supporting plate (201) is welded with the platform plate (102) and the lifting track (107), the slewing bearing (202) is fixed at the center of the supporting plate (201) through bolts, the slewing bearing (202) adopts a worm gear structure, the worm gear is in a gear ring structure and is installed at the center of the supporting plate (201), the worm drives the worm gear to realize 180-degree rotation of the clamping mechanism (1), and meanwhile, the self-locking performance of the worm gear and the worm ensures that the clamping mechanism (1) does not rotate, so that the rotation precision is ensured; the lifting mechanism (3) comprises: the device comprises a support seat (301), a platform bearing (302), a platform shaft (303), a connecting plate (304) and a hydraulic oil cylinder III (305); the supporting seat (301) and the hydraulic oil cylinder III (305) are fixed on the base (4), and the hydraulic oil cylinder III (305) pushes and pulls the connecting plate (304), so that the clamping mechanism (1) and the rotating mechanism (2) can turn around the platform shaft (303) by 90 degrees through the platform bearing (302); the base (4) comprises: flat steel (401), square steel (402) and universal wheels (403); the square steel (402) on the bottom surface of the base (4) is parallelly welded into a rectangular structure, four short square steels (402) are welded into a four-column structure, the flat steel (401) is welded at the top of the four-column structure, four sets of foldable universal wheels (403) are arranged below the bottom surface of the base (4), and a self-locking structure is arranged on each universal wheel (403), so that the whole device is convenient to move and works reliably; the clamping rod (106) is of a three-section structure and comprises an upper clamping rod, a middle clamping rod and a lower clamping rod, the middle clamping rod is of a hollow structure, the upper clamping rod and the lower clamping rod are connected with a spring, the clamping rod (106) moves in the sliding rail (103), the clamping rod (106) transversely clamps a paper stack firstly, the fork (101) longitudinally clamps the paper stack secondly, and the spring is compressed into a cavity of the middle clamping rod when the upper clamping rod and the lower clamping rod are pressed by the fork (101); the roller plate II (110) is drilled with a cylindrical through hole, and the roller II (117) is fixed through a bolt, so that rolling friction is realized when the roller plate II moves up and down in the lifting track (107); the hydraulic oil cylinder II (112) pushes the connecting rod (113) to drive the roller plate II (110) to move, the roller plate II (110) is pulled by the chain (111) to move towards the roller plate II (110), so that the roller plates II (110) on two sides are uniformly stressed, the roller plate II (110) moves in the lifting track (107) through the roller II (117), and the longitudinal distance of the fork (101) is adjustable; the supporting plate (201) of the rotating mechanism (2) is welded on the platform plate (102) and the lifting rail (107), and the slewing bearing (202) is fixed at the central position of the supporting plate (201) through a bolt, so that the rotating mechanism (2) can bear axial force and longitudinal force; the slewing bearing (202) is welded with the connecting plate (304), reinforcing ribs are welded on the connecting plate (304) to prevent heavy-load deformation, two sets of supporting seats (301) are arranged, one set of supporting seats is connected with the connecting plate (304), the other set of supporting seats is connected with the flat steel (401), and the two sets of supporting seats (301) are connected with the platform shaft (303) through the platform bearing (302); a base of the hydraulic oil cylinder III (305) of the pushing mechanism (3) is connected with the bottom of the base (4) through an ear ring and a trunnion structure, an oil cylinder rod of the hydraulic oil cylinder III (305) is connected with the connecting plate (304) through an ear ring and a trunnion structure, and the hydraulic oil cylinder III (305) pushes the connecting plate (304) to realize that the clamping mechanism (1) and the rotating mechanism (2) overturn for 90 degrees around the platform shaft (303); the skeleton of base (4) is square steel (402), the afterbody of base (4) has counter weight structure, prevents under the heavy load condition that the structure of whole device warp.

2. The automatic turnover device with the adjustable transverse and longitudinal distances of the pallet fork as claimed in claim 1, wherein: the control system adjusts the rotating speed and the direction of the motor, controls the push-pull actions of the hydraulic oil cylinder I (104), the hydraulic oil cylinder II (112) and the hydraulic oil cylinder III (305) to be carried out at different speeds and directions, collects motor information and sensor information, and realizes and controls the operation; the control system is provided with an overflow valve to prevent the machine and the paper pile from being damaged by excessive push-pull of the hydraulic oil cylinder I (104), the hydraulic oil cylinder II (112) and the hydraulic oil cylinder III (305).