JP2015151209A - Sheet stack supporting device and stacking/transporting device for sheet stack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet stack supporting device capable of supporting a sheet stack at both lateral end parts with a pair of right and left supporters to lift it without making folding on the lowest sheet in the sheet stack and capable of being smoothly pulled out the supporters in lateral direction.SOLUTION: The sheet stack supporting device comprises: supporters 51 supporting both lateral end parts of a sheet stack Sfrom bottom; a belt 52 wound on periphery of each supporter 51; a belt lock mechanism 56 capable of switching lock mode and free mode; a straight moving mechanism 45A horizontally moving the supporters 51 so as to be pulled out in lateral direction of the sheet stack S. The belt lock mechanism 56 is switched to lock mode when both lateral end parts of the sheet stack Sare supported by the supporters 51. The belt lock mechanism 56 is switched to free mode when the supporters 51 are pulled out in lateral direction of the sheet stack S.

Description

  The present invention relates to a sheet pile support device and a sheet pile stacking and conveying apparatus using the sheet pile support device.

  In the production of corrugated cardboard sheets, there is a case where a sheet pile formed by stacking corrugated cardboard sheets is stacked on another sheet pile. For example, when a plurality of short sheet piles are discharged from the sheet stacker located at the most downstream side of the corrugator, the plurality of short sheet piles are stacked on top of each other to perform a work to make a tall sheet pile There is. Conventionally, such a stacking operation of the sheet piles has been manually performed by an operator. However, even a short sheet pile has a considerable weight, and thus requires a large amount of labor.

  Therefore, the inventor has developed a sheet pile stacking apparatus in-house and made a prototype thereof in order to eliminate the labor of stacking the sheet piles. The sheet pile stacking device is configured to convey a plurality of sheet piles arranged without gaps in the front-rear direction in a state where a space is formed below both left and right ends of the conveyor unit, and a plurality of sheet piles on the conveyor unit. A sheet pile support device that supports both left and right ends of the first sheet pile, and the first sheet pile supported by the sheet pile support device is equal to or higher than the conveying speed of the conveyor unit. The first sheet pile is lifted to a position higher than the upper surface of the second sheet pile on the conveyor unit located behind the first sheet pile by moving upward at a high speed, and the lifted first sheet pile is It is to be lowered onto the second sheet pile.

  Here, the sheet pile support device that supports both left and right ends of the sheet pile is a pair of left and right supports that support the left and right ends of the sheet pile formed by stacking corrugated sheets from below, and the pair of supports. And a linear motion mechanism that moves horizontally so as to be pulled out to the outside in the left-right direction of the sheet pile. As a sheet pile support device having this configuration, for example, a device described in Patent Document 1 is known.

  Using the sheet pile stacking device as described above not only eliminates the labor of manually stacking the sheet piles, but also stacks the sheet piles without stopping the flow of the sheet piles on the conveyor unit. Therefore, there is an advantage that the time required for stacking the sheet piles can be made extremely short.

  By the way, when the inventor evaluated the sheet pile stacking apparatus as described above as a prototype, the left and right ends of the first sheet pile are supported when the left and right lengths of the sheet pile are relatively short. Then, the operation of lifting and lowering the first sheet pile onto the second sheet pile could be performed without any problem. It has been found that when the left and right ends are supported and lifted, the corrugated cardboard sheet located at the bottom of the sheet pile may be bent.

  That is, when the length of the sheet pile in the left-right direction is relatively long, when the left and right ends of the sheet pile are supported and lifted, the bottom corrugated sheet of the sheet pile is directed from the left and right ends to the center by its own weight. It was found that the bottom corrugated cardboard sheet could be bent. If the cardboard sheet is bent, the cardboard sheet becomes a defective product.

  Therefore, the inventors of the present application have investigated the cause of bending of the lowermost corrugated sheet of the sheet pile, and the cause is when the left and right ends of the sheet pile are supported by a pair of left and right supports from the lower side and lifted. It was found that this is a slip (that is, a relative movement in the left-right direction) between the lower surface of the sheet pile and the support. If there is no slip between the lower surface of the sheet pile and the support, it becomes possible to prevent the cardboard sheet at the bottom of the sheet pile from sagging from the left and right ends toward the center due to its own weight. It is possible to prevent the lower corrugated cardboard sheet from being bent.

  However, on the other hand, when it is difficult to slip between the lower surface of the seat mountain and the support body, when the pair of support bodies in a state where the left and right end portions of the seat mountain are supported from the lower side are pulled out to the outside in the left-right direction, It becomes difficult to pull out the body smoothly.

JP 2002-144272 A

  The problem to be solved by the present invention is that the left and right ends of the sheet pile can be supported and lifted by a pair of left and right supports without causing bending at the lowermost sheet of the sheet pile, and the support body. Is to provide a seat pile support device that can be smoothly pulled out to the outside in the left-right direction.

In order to solve the above-mentioned problems, the present invention employs the following configuration for the seat pile support device.
A pair of left and right supports that support the left and right ends of the stack of sheets formed by stacking the sheets from below;
A belt that is rotatably wound around the outer periphery of the support so that the contact surfaces with respect to the left and right ends of the sheet mountain can move in the left-right direction of the sheet mountain;
A belt lock mechanism capable of switching between a locked state preventing rotation of the belt and a free state allowing rotation of the belt;
A linear motion mechanism that moves the support horizontally so as to be pulled out to the outside in the left-right direction of the sheet pile,
The belt lock mechanism is locked when the left and right ends of the seat ridge are supported by the support, and the belt lock mechanism is free when the support is pulled out to the outside in the left and right direction of the seat ridge. Mountain support device.

  In this case, the left and right ends of the seat pile are supported by the support body in a state where the rotation of the belt wound around the outer periphery of the support body is blocked by the belt lock mechanism. When lifted up, it is possible to prevent relative movement in the left-right direction between the corrugated cardboard sheet at the bottom of the seat pile and the support. As a result, it is possible to prevent the lowermost corrugated cardboard sheet from dropping from the left and right ends toward the center due to its own weight, and it is possible to prevent the lowermost corrugated cardboard sheet from bending. On the other hand, when pulling out the support body to the outside in the left-right direction of the seat crest, the belt lock mechanism is released from the locked state, and the support member can be smoothly rotated by allowing the belt wound around the support body to rotate. It is possible to pull it out.

  It is preferable that the sheet pile support device further includes a pair of left and right sheet pressers provided so as to be movable up and down so as to press the upper surfaces of the left and right ends of the sheet pile supported by the support.

  In this way, when the left and right ends of the sheet pile are supported by the support, the pair of left and right sheet presses are lowered to hold the upper surfaces of the left and right ends of the sheet pile, thereby It is possible to effectively prevent slippage between the two.

  It is preferable that the support body has a cushion that deforms in accordance with the deflection of the seat mountain when the left and right ends of the seat mountain are supported from the lower side, and a metal seat plate that supports the cushion. .

  In this case, when the left and right ends of the seat mountain are supported from the lower side by the support body, the cushion is deformed according to the deflection of the seat mountain, so that the lower surface of the seat mountain is the inner end in the left-right direction of the support body. It is possible to prevent bending from occurring at the contact portion.

  The belt lock mechanism is a belt that is supported so as to be movable between a lock position that contacts the belt and prevents rotation of the belt, and a lock release position that allows rotation of the belt away from the belt. A lock member and a lock actuator that moves the belt lock member between the lock position and the unlock position can be employed.

  If it does in this way, it can be in the locked state which prevents rotation of a belt by moving a belt lock member from a lock release position to a lock position with a lock actuator. Further, by moving the belt lock member from the lock position to the lock release position by the lock actuator, a free state in which the rotation of the belt is allowed can be obtained.

  The seat pile support device moves a portion of the belt above the support body relative to the support body inward in the left-right direction when the support body is pulled out to the outside in the left-right direction of the seat pile. It is preferable to further have a belt feeding portion.

  In this way, even when the rotation resistance of the belt is relatively large, the belt rotates according to the pulling operation of the support, and the support can be smoothly pulled out from the lower surface of the seat pile. .

The belt is configured such that its front surface has a larger coefficient of friction than the back surface;
The belt feeding unit is composed of a scraping blade that contacts the surface of the belt at positions adjacent to the left and right ends of the sheet crest, and a scraping actuator that moves the scraping blade relative to the support. To configure
When pulling out the support body to the outside in the left-right direction of the sheet pile, the scraping actuator moves the scraping blade relative to the support body in the left-right direction, and the scraping blade and the surface of the belt It is preferable to move the portion of the belt above the support relative to the support inward in the left-right direction by the frictional force generated between the belt and the belt.

  In this case, when the support body is pulled out to the outside in the left-right direction of the sheet pile, even if slippage occurs between the lower surface of the sheet pile and the belt, the scraping blades are arranged at both left and right ends of the sheet pile. Since the portion is scraped off from above the support, it is possible to reliably pull out the support from the lower surface of the sheet pile.

The present invention also provides a stacking and conveying apparatus for stacking sheets using the above-described stacking sheet supporting apparatus having the following configuration.
A conveyor unit that transports forward a plurality of sheet piles arranged in the front-rear direction in a state where a space is formed below both left and right end portions thereof;
A sheet pile support device for supporting the left and right ends of the first sheet pile among the plurality of sheet piles on the conveyor unit;
By raising the first sheet crest supported by the sheet crest support device while moving forward at a speed equal to or faster than the conveying speed of the conveyor unit, the first sheet crest is raised. A stack of sheet piles that lifts up to a position higher than the upper surface of the second sheet pile on the conveyor unit located behind, and lowers the lifted first sheet pile onto the second sheet pile,
A stack of sheet piles using the above-described sheet pile support device as the sheet pile support device.

  In the sheet pile stacking and conveying apparatus, the sheet pile supporting device lifts the first sheet pile up to a position higher than the upper surface of the second sheet pile and then stops it, and immediately below the lifted first sheet pile. It is possible to drive to stand still until the second sheet pile is conveyed by the conveyor unit. However, in this case, the first sheet pile is lifted and then placed on the second sheet pile. The time until it is lowered becomes longer.

  Therefore, in order to more effectively shorten the cycle time required for stacking the sheet piles, the sheet pile support apparatus lifts the first sheet pile after raising it to a position higher than the upper surface of the second sheet pile. Preferably, the first sheet pile is moved backward while the first sheet pile is lifted until the first sheet pile is lowered onto the second sheet pile on the conveyor unit.

  In this case, since the time taken to lift the first sheet peak to a position higher than the upper surface of the second sheet peak and to lower the lifted first sheet peak on the second sheet peak is shortened. The cycle time required for stacking the sheet piles can be shortened more effectively.

  The conveyor unit includes a plurality of divided conveyors arranged in the left-right direction of the sheet crest, and each of the divided conveyors has a raised position where the conveying surface contacts the lower surface of the sheet crest, and the conveying surface separates from the lower surface of the sheet crest. It is configured to be able to move up and down between the lowering position and the lower part of the left and right ends of the sheet piles of the divided conveyors, and the lower part of the left and right ends of the sheet piles by lowering the divided conveyors located outside thereof. What forms a space can be adopted. In this way, it is possible to cope with a plurality of types of sheet piles having different dimensions in the left-right direction, and it is suitable for installation at the exit of a sheet stacker that discharges sheet piles having different dimensions corresponding to various production lots. .

  The seat pile support device according to the present invention supports the left and right ends of the seat pile in a state in which the rotation of the belt hung around the outer periphery of the support body is blocked by the belt lock mechanism. It is possible to lift the left and right ends of the seat pile with the support without causing any bending. Also, when pulling out the support body to the outside in the left-right direction of the seat crest, the belt lock mechanism is unlocked and the belt hung around the outer periphery of the support body is allowed to rotate. It can be pulled out.

The top view which shows the stack conveyance apparatus of the sheet pile which uses the sheet pile support apparatus of embodiment of this invention Enlarged view of the stacking and conveying apparatus shown in FIG. Sectional view along line III-III in FIG. Sectional view along line IV-IV in FIG. The enlarged view of the vicinity of the 1st nail | claw of FIG. Sectional view along line VI-VI in FIG. Sectional drawing along the VII-VII line of FIG. FIG. 3 is an enlarged perspective view in the vicinity of the first and second claws of FIG. Sectional view along line IX-IX in FIG. Sectional view along line XX in FIG. Sectional view along line XI-XI in FIG. Sectional drawing which shows the state which supported the left and right both ends of the sheet pile from the lower side with the support body of the 1st nail | claw shown in FIG. Sectional drawing which shows the state in the middle of pulling out the support body of the 1st nail | claw shown in FIG. (A) is a figure which shows the state just before a 1st nail | claw lifts a 1st sheet | seat pile in the process of stacking | stacking a sheet | seat pile with the stack conveyance apparatus shown in FIG. 2, (b) is a side view of (a). Figure (A) is a state in which the first claw lifts the lower surface of the first sheet peak to a position higher than the upper surface of the second sheet peak in the process of stacking the sheet peaks in the stacking and conveying apparatus shown in FIG. The figure to show, (b) is a side view of (a) (A) is a figure which shows the state immediately after the 1st nail | claw lowered the 1st sheet peak on the 2nd sheet peak in the process in which the stacking | stacking conveyance apparatus shown in FIG. ) Side view of (a) (A) shows a state in which the second claw lifts the lower surface of the second sheet mountain up to a position higher than the upper surface of the third sheet mountain in the process of stacking the sheet piles in the stack conveyance device shown in FIG. The figure to show, (b) is a side view of (a) (A) is the figure which shows the state immediately after the 2nd nail | claw lowered the 2nd sheet peak on the 3rd sheet peak in the process in which the stacking | stacking conveyance apparatus shown in FIG. ) Side view of (a) FIG. 1 is a plan view showing a state in which a sheet pile having a large size in the front-rear direction is fed into the stack conveyance device shown in FIG. The figure which shows the state just before a 1st nail | claw and a 2nd nail | claw lift a 1st sheet | seat pile in the process of stacking | stacking a sheet | seat pile with the stack conveyance apparatus shown in FIG. In the process of stacking the sheet piles with the stacking and conveying apparatus shown in FIG. 19, the first claw and the second claw immediately after raising the lower surface of the first sheet mountain to a position higher than the upper surface of the second sheet mountain. Diagram showing state FIG. 19 is a diagram illustrating a state immediately after the first claw and the second claw descend the first sheet crest on the second sheet crest in the process of performing the stacking operation of the sheet crest with the stack conveyance device illustrated in FIG. The figure explaining the height of the sheet pile when the height of the sheet pile after stacking exceeds the height of the sheet pile discharged from the sheet stacker at the normal time. 23. The process of dividing the sheet pile shown in FIG. 23 into small piles of small batches, and stacking the sheet piles of each small batch with the stacking and conveying apparatus shown in FIG. Figure explaining

  FIG. 1 shows a stacking and conveying apparatus 2 for stacking sheets using the sheet pile supporting apparatuses 1A and 1B according to the embodiment of the present invention, an upstream conveyor 3 connected to the upstream side of the stacking and conveying apparatus 2 for stacking sheets, and a sheet. The downstream conveyor 4 connected to the downstream side of the pile stacking conveying apparatus 2 is shown.

The inlet of the upstream conveyor 3 (the upper end of the upstream conveyor 3 in FIG. 1) is connected to the outlet of a sheet stacker (not shown). The sheet stacker is an apparatus that is disposed on the most downstream side of the corrugator that produces corrugated cardboard sheets, and forms the sheet piles S _{1 to} S ₃ by stacking the corrugated cardboard sheets produced on the upstream side.

The upstream conveyor 3 receives and horizontally conveys the plurality of sheet peaks S _{1 to} S ₃ discharged from the sheet stacker, and sends the sheet peaks S _{1 to} S ₃ to the stack conveyance device 2. At this time, the plurality of sheet mountains S _{1 to} S ₃ are conveyed forward in a state in which they are aligned without gaps in the front-rear direction. Further, each of the sheet piles S _{1 to} S ₃ is a front in a direction in which the direction perpendicular to the steps of the corrugated cardboard sheet constituting the seat pile is the left-right direction and the direction parallel to the step of the corrugated cardboard sheet constituting the seat pile is the front-back direction. It is conveyed to. Upstream conveyor 3, in transferring the sheet pile S ₁ to S ₃ discharged from the sheet stacker, to prevent scratches and dents ascending cardboard sheet at the bottom of the sheet pile S ₁ to S ₃ Adopt belt conveyor.

The downstream conveyor 4 is arranged so that the outlet of the downstream conveyor 4 (the lower end of the downstream conveyor 4 in FIG. 1) is connected to a storage line (not shown). The downstream conveyor 4 receives the sheet piles S _{1 to} S ₃ discharged from the stacking and conveying device 2 and horizontally conveys them, and sends the sheet piles S _{1 to} S ₃ to the storage line. Similarly to the upstream conveyor 3, the downstream conveyor 4 employs a belt conveyor so that the bottom corrugated sheet of the sheet piles S _{1 to} S ₃ is not damaged or dented.

As shown in FIG. 2, the stacking and conveying apparatus 2 includes a conveyor unit 5 that receives a plurality of sheet piles S _{1 to} S ₃ arranged without gaps in the front-rear direction from the upstream conveyor 3 and conveys them forward, and on the conveyor unit 5. first the first sheet pile support device 1A lifting the left and right ends of the sheet pile S ₁ is supported by a pair of right and left first pawl 6A, the second sheet pile S ₂ of the right and left end portions on the conveyor unit 5 a second sheet pile support device 1B lifting is supported by a pair of left and right second claw 6B, the first sheet pile support device 1A and the second sheet pile support device 1B before and after the sheet pile S ₁ to S ₃ And a pair of left and right main frames 7 that are movably supported in the direction. The conveyor unit 5 includes a plurality of divided conveyors 8 arranged in the left-right direction of the sheet crests S _{1 to} S ₃ .

  As shown in FIG. 3, each of the divided conveyors 8 is provided with a conveyor frame 9 extending in the front-rear direction, a head pulley 10 provided rotatably at the front end of the conveyor frame 9, and rotatably provided at the rear end of the conveyor frame 9. Tail pulley 11, a drive pulley 12 provided below the conveyor frame 9, the head pulley 10, a conveyor belt 13 wound around the tail pulley 11 and the drive pulley 12, and the conveyor frame 9 are driven up and down. And a conveyor lifting device 14.

  The head pulley 10 and the tail pulley 11 are driven pulleys that rotate following the conveyance belt 13. The head pulley 10 and the tail pulley 11 are supported by the conveyor frame 9 so as to move up and down integrally with the conveyor frame 9 when the conveyor frame 9 moves up and down. One head pulley 10 and one tail pulley 11 are provided for each divided conveyor 8 so that each divided conveyor 8 can be moved up and down individually.

  The drive pulley 12 is a pulley that is rotationally driven by a conveyor drive motor 15 (see FIG. 2), and is common to these divided conveyors 8 so as to collectively drive a plurality of divided conveyors 8 arranged in the left-right direction. The book is provided. The drive pulley 12 is supported independently of the conveyor frame 9 so as to rotate at a fixed position, and the drive pulley 12 does not move up and down even when the conveyor frame 9 moves up and down.

As shown in FIG. 3, guide pulleys 16 are provided in the vicinity of the drive pulley 12 on the feeding side and the drawing side of the conveyor belt 13, respectively. The guide pulley 16 is a pulley that secures a winding angle of the conveyor belt 13 with respect to the drive pulley 12. The guide pulley 16 is also supported independently of the conveyor frame 9 like the drive pulley 12. The drive pulley 12 is provided with a rotation sensor (not shown). The rotation sensor detects the conveyance distance of the sheet crests S _{1 to} S ₃ on the division conveyor 8. Here, in order to prevent slippage between the drive pulley 12 and the conveyor belt 13, it is preferable that the conveyor belt 13 is a belt having a shape that meshes with the teeth of the drive pulley 12 that is a toothed pulley.

  The conveyor lifting device 14 is provided for each conveyor frame 9 so that each divided conveyor 8 can be lifted and lowered individually. Further, the conveyor lifting device 14 is provided at each of the front part and the rear part of the conveyor frame 9. As the conveyor lifting device 14, a pneumatic cylinder that expands and contracts up and down with compressed air can be employed. Moreover, the conveyor frame 9 is supported by the raising / lowering guide 17 provided in the front part and the rear part of the conveyor frame 9 so that an up-down movement is possible.

As shown in FIG. 4, each of the divided conveyors 8 includes a rising position where the conveying surface (that is, the upper surface of the divided conveyor 8) is in contact with the lower surface of the sheet piles S _{1 to} S ₃ by driving the conveyor lifting device 14. underside conveying surface from S ₁ to S ₃ are vertically movable between a lowered position away. The raising / lowering stroke of the division conveyor 8 is set in the range of about 50 to 150 mm. By setting the lifting stroke to be larger than 50 mm, the first claw 6A and the second claw 6B are placed between the lower surfaces of the left and right ends of the sheet crests S _{1 to} S ₃ and the upper surface of the divided conveyor 8 at the lowered position. A space 18 for insertion can be secured. By setting the lifting / lowering stroke to be smaller than 150 mm, the height of the conveying surface of the divided conveyor 8 at the raised position can be suppressed, so that the lower surface of the sheet piles S _{1 to} S ₃ discharged from the existing sheet stacker It becomes easy to make the height of the upper surface of the division conveyor 8 in the raised position coincide with the position.

  As shown in FIGS. 2 and 3, the main frame 7 is supported by a linear guide 19 provided at the front end and the rear end of the conveyor unit 5 so as to extend in the left-right direction so as to be movable in the left-right direction. Each main frame 7 is provided with a main frame driving device 20 that moves the main frame 7 in the left-right direction.

As shown in FIG. 2, the main frame driving device 20 includes a pair of rotating shafts 21 and 22 that are arranged at intervals in the left-right direction of the sheet piles S _{1 to} S ₃ so as to sandwich the conveyor unit 5 therebetween. An electric motor 23 that drives one rotating shaft 21, a sprocket 24 that rotates integrally with the rotating shaft 21, a sprocket 25 that is mounted on the other rotating shaft 22 so as to be capable of relative rotation, and windings around these sprockets 24, 25. The chain 26 is hung. The chain 26 is connected to the main frame 7 via a chain bracket 27, and the main frame 7 connected to the chain 26 is moved to the seat crests S _{1 to} S by running the chain 26 with the driving force of the electric motor 23. _{3 in} the left-right direction.

  Next, the configuration of the first sheet pile support device 1A will be described. Since the second sheet pile support device 1B has the same configuration as the first sheet mountain support device 1A in the front-rear symmetry, the portion corresponding to the first sheet mountain support device 1A has the same symbol or the alphabet A at the end. A description is omitted with reference numerals replaced with B.

As shown in FIGS. 5 and 6, the first sheet pile support device ₁ </ b> A extends in the front-rear direction of the sheet piles S _{1 to} S ₃ with respect to the pair of left and right main frames 7 (that is, the conveying direction of the conveyor unit 5). A front / rear direction moving frame 30A provided movably, a lifting bracket 31A provided movably up / down with respect to the front / rear moving frame 30A, and a left / right direction of the seat peaks S _{1 to} S ₃ with respect to the lifting bracket 31A The first claw 6A is attached to the tip of the claw support arm 32A.

As shown in FIG. 4, the front-rear moving frame 30 </ b> A is supported by a pair of upper and lower linear guides 33 provided on the main frame 7 so as to be movable in the front-rear direction of the seat peaks S _{1 to} S ₃ . Each of the front-rear moving frames 30A is provided with a front-rear driving device 34A that moves the front-rear moving frame 30A in the front-rear direction of the seat peaks S _{1 to} S ₃ .

As shown in FIGS. 4 and 6, the front-rear direction drive device 34 </ b> A includes a pair of upper and lower racks 35 extending in the front-rear direction of the seat peaks S _{1 to} S ₃ fixed to the main frame 7, and pinions that mesh with the racks 35. 36, a pinion shaft 37 that rotates integrally with the pinion 36, and an electric motor 38 with a speed reducer that rotationally drives the pinion shaft 37.

The pinion shaft 37 is rotatably supported by the front-rear direction moving frame 30A, and the electric motor 38 is also supported by the front-rear direction moving frame 30A. By rotating the pinion 36 with the driving force of the electric motor 38, the pinion 36 moves in the front-rear direction of the seat peaks S _{1 to} S ₃ while meshing with the rack 35, and the front-rear moving frame 30 A moves with the pinion 36. It is like that.

  As shown in FIGS. 5 and 6, the lifting bracket 31 </ b> A is supported by a linear guide 39 provided on the longitudinal moving frame 30 </ b> A so as to be movable in the vertical direction. As shown in FIG. 3, the back-and-forth moving frame 30A is provided with a lifting drive unit 40A that moves the lifting bracket 31A in the vertical direction.

  As shown in FIGS. 3 and 4, the elevating drive device 40 </ b> A includes a pair of pulleys 41 that are vertically spaced apart, a transmission belt 42 wound around these pulleys 41, and one pulley 41. It comprises an electric motor 43 that rotates. The transmission belt 42 is connected to the lifting bracket 31A. By causing the transmission belt 42 extending vertically to run with the driving force of the electric motor 43, the lifting bracket 31A connected to the transmission belt 42 is raised and lowered.

As shown in FIG. 6, the claw support arm 32 </ b> A is supported by a linear guide 44 provided on the elevating bracket 31 </ b> A so as to be movable in the left-right direction of the seat peaks S _{1 to} S ₃ . Further, the elevating bracket 31A is provided with a linear motion mechanism 45A for moving the claw support arm 32A forward and backward in the left and right directions of the seat peaks S _{1 to} S ₃ , and the claw support arm 32A protrudes by the driving force of the linear motion mechanism 45A. position between the (first pawl 6A is a position opposed to the lower surface of the left and right ends of the sheet pile S ₁₎ and a retracted position (the first pawl 6A was drawn in the lateral direction outwardly from the lower surface of the sheet pile S ₁ position) It is designed to move horizontally. A pneumatic cylinder that expands and contracts with compressed air can be employed as the linear motion mechanism 45A.

  The 1st nail | claw 6A is arrange | positioned and shifted | deviated to the back-and-forth direction moving frame 30B side rather than the front of the back-and-forth direction moving frame 30A, and the 2nd nail | claw 6B is the back-and-forth direction moving frame 30A side rather than the front of the back-and-forth direction moving frame 30B. It is shifted and arranged. Thereby, when the front-rear moving frames 30A, 30B are adjacent to each other in the front-rear direction (that is, when the front-rear moving frames 30A, 30B are in the relative positional relationship shown in FIG. 6), It is possible to match the positions of both claws of the second claw 6B in the front-rear direction. In addition, the 1st nail | claw 6A and the 2nd nail | claw 6B are set as the same structure symmetrical back and forth.

As shown in FIG. 4, a seat presser 46 </ b> A is provided on the longitudinally moving frame 30 </ b> A so as to be movable up and down. As shown in FIG. 7, the sheet presser 46A is supported by a linear guide 47 provided on the longitudinal movement frame 30A so as to be movable in the vertical direction. As shown in FIG. 4, the sheet presser 46 </ b> A is connected so as to move integrally with a transmission belt 49 wound around a pair of upper and lower pulleys 48, and drives an electric motor 50 connected to the upper pulley 48. By doing so, the sheet presser 46A is moved up and down. The seat retainer 46A, as can be suppressed upper surface of the left and right ends of the sheet pile S _1, are provided a pair of left and right front-back direction moving frame 30A.

As shown in FIGS. 8 to 11, the first claw 6 </ b> A has a pair of left and right support bodies 51 that support the left and right ends of the sheet mountain S ₁ from the lower side, and a contact surface with respect to the left and right ends of the sheet mountain S _1. It consists of a sheet pile S ₁ in the horizontal direction in over pivotably so as to be movable in the outer periphery of the support 51 around a belt 52.

The belt 52 is a cylindrical endless belt whose surface is formed of a synthetic resin (for example, polyurethane, polyolefin, etc.). The belt 52 is configured such that its front surface has a larger coefficient of friction than the back surface. Therefore, the frictional force acting between the surface and the sheet pile S ₁ of the belt 52 when supporting the right and left ends of the sheet pile S ₁ a support 51 via a belt 52, the backside of the belt 52 and the support It becomes larger than the frictional force which acts between 51.

As shown in FIG. 10, the support body 51 includes a cushion 53 having a flexibility so as to be deformed in accordance with the deflection of the seat mountain S ₁ when the left and right ends of the seat mountain S ₁ are supported from below. And a metal seat plate 54 that supports 53. The cushion 53 includes a foamed resin molded body 53a and a non-foamed resin plate 53b attached to the upper surface of the foamed resin molded body 53a. Here, the resin plate 53b prevents abrasion of the foamed resin molded body 53a due to contact with the belt 52, and frictional force acting between the back surface of the belt 52 and the support body 51 when the belt 52 rotates. It plays a role to reduce.

As shown in FIG. 11, the seat plate 54 is formed in an L-shaped cross section so as to face the lower surface of the cushion 53 and the lateral side surface of the cushion 53 in the left-right direction. As shown in FIG. 8, the seat plate 54 is fixed to the claw support arm 32 </ b> A via an extending portion 55 that extends from one end portion in the front-rear direction of the seat plate 54. Accordingly, pawl support arm 32A and the seat plate 54 is adapted to move together, the support 51 by the linear motion mechanism 45A (see FIG. 6) is driven in the horizontal direction of the sheet pile S _1.

  As shown in FIG. 10, the first pawl 6 </ b> A has a belt lock mechanism 56 that can switch between a locked state that prevents the belt 52 from rotating and a free state that allows the belt 52 to rotate. It is attached. The belt lock mechanism 56 includes a belt lock member 57 and a lock actuator 58.

  The belt lock member 57 includes a lock position where the belt lock member 57 contacts the belt 52 and prevents the belt 52 from rotating, and a lock release where the belt lock member 57 separates from the belt 52 and allows the belt 52 to rotate. It is supported so as to be swingable between positions. Here, the belt lock member 57 is disposed so as to have a portion facing the lower surface of the support 51 with the belt 52 interposed therebetween, and swings about the fulcrum shaft 59 so that the portion moves in the vertical direction. Supported as possible. Further, the contact portion of the belt lock member 57 with respect to the belt 52 (that is, the portion facing the lower surface of the support 51 with the belt 52 interposed therebetween) is provided with a slip stopper.

  The lock actuator 58 is an actuator that swings the belt lock member 57 between the lock position and the lock release position. Here, the lock actuator 58 is a pneumatic cylinder connected to a portion of the belt lock member 57 opposite to the lower surface of the support 51 with the fulcrum shaft 59 interposed therebetween, and the belt lock member 57 is pneumatically connected. Is made to swing.

Further, the first claw 6 </ b> A is provided with a belt feeding portion 60 that moves a portion of the belt 52 above the support body 51 relative to the support body 51. As shown in FIG. 11, the belt feed unit 60 includes a scraping blade 61 at a location adjacent to the supported both left and right ends of the sheet pile S ₁ the support 51 through the belt 52 contacts the surface of the belt 52, It comprises a scraping actuator 62 (see FIG. 8) for moving the scraping blade 61 relative to the support 51.

Scraping blade 61 is formed in a hollow cylindrical shape extending in the longitudinal direction of the sheet pile S _1, the blade support arm 63 is inserted therein. The scraping blade 61 is urged downward by the force of a spring 64 incorporated between the blade support arm 63 and the scraping blade 61 and pressed against the surface of the belt 52. The scraping blade 61 is formed in a cross-sectional shape (a cross-sectional square shape in the drawing) having a flat lower surface that comes into surface contact with the surface of the belt 52.

As shown in FIG. 8, the actuator 62 scraped is a pneumatic cylinder which is attached to pawl support arm 32A to move the blade support arm 63 in the lateral direction of the sheet pile S _1. Further, the pawl support arm 32A, linear guide 65 for movably supporting the blade support arm 63 in the lateral direction of the sheet pile S ₁ is attached.

Here, the belt feeding unit 60, by relatively moving the blade 61 scraping off the driving force of the scraping actuator 62 inward in the lateral direction of the sheet pile S ₁ with respect to the support 51, the blade 61 scraped this time And the surface of the belt 52, the portion above the support 51 of the belt 52 can be moved relative to the support 51 inward in the left-right direction.

Hereinafter, the lifting supports the right and left ends of the sheet pile S ₁ from the lower side support 51 of the first pawl 6A, then the above when pulling out the pair of supports 51 in the lateral direction outside the sheet pile S ₁ The operation of the belt lock mechanism 56 and the belt feeding unit 60 will be described.

First, as shown in FIGS. 11 and 12, when lifting the left and right ends of the sheet pile S ₁ is supported by the support 51 of the first pawl 6A, the belt locking mechanism 56 is kept in the locked state. In other words, the lock actuator 58 is operated to move the belt lock member 57 to the lock position (a position where the belt 52 is prevented from rotating by pressing the belt lock member 57 against the surface of the belt 52). Thus, when lifting the left and right end portions of the sheet pile S _1, since the relative movement in the lateral direction is prevented from occurring between the lower surface of the sheet pile S ₁ and the support 51, the sheet pile S ₁ a state in which the bottom of the cardboard sheet is pulled outwardly in the lateral direction, the bottom of the cardboard sheet of the sheet pile S ₁ is able to prevent the hanging from the left and right ends toward the center by its own weight. As a result, when lifting the left and right end portions of the sheet pile S _1, the sheet pile S ₁ and it is possible to prevent the bottom of the cardboard sheet is folded.

Furthermore, when lifting the left and right ends of the sheet pile S ₁ is supported by the support 51 of the first pawl 6A, without operating the belt feeding unit 60, to fix the blade 61 scraped off relative positions of the support 51 Leave it in a state. Thus, when lifting the left and right ends of the sheet pile S _1, is frictional force of the belt 52 rotating between the scraping surface of the blade 61 and the belt 52 is prevented, the lower surface and the support of the sheet pile S ₁ Thus, it is possible to more reliably prevent the relative movement in the left-right direction from occurring with respect to 51.

Further, when the left and right ends of the sheet pile S ₁ is lifted by the support 51 of the first pawl 6A, as shown in FIG. 12, a cushion 53 constituting the support 51 according to the deflection of the sheet pile S ₁ since deformation Te, the lower surface of the sheet pile S ₁ is being prevented from causing bending at the contact portions with respect to the lateral direction inner end of the support 51.

As shown in FIG. 13, when pulling out the support 51 of the first pawl 6A in the left-right direction outer side of the sheet pile S _1, the belt locking mechanism 56 is left in the free state. In other words, the lock actuator 58 is operated to move the belt lock member 57 to the unlock position (position where the belt 52 is allowed to rotate by moving the belt lock member 57 away from the surface of the belt 52). Thus, when the left-right direction outer side of the sheet pile S ₁ is pulled out of the support 51, the belt 52 rotates by a frictional force between the surface of the sheet pile S ₁ of the lower surface and the belt 52, a smooth support 51 It can be pulled out.

Further, when pulling out the support 51 of the first pawl 6A in the left-right direction outer side of the sheet pile S _1, by actuating the belt feeding unit 60, the upper portion than the support 51 of the belt 52 to the support 51 Relatively move inward in the left-right direction. That is, the scraping actuator 62 is operated so that the scraping blade 61 moves inward in the left-right direction relative to the support 51, and the frictional force generated between the scraping blade 61 and the surface of the belt 52 is activated. The portion of the belt 52 above the support 51 is moved relative to the support 51 inward in the left-right direction. Thereby, even when the rotation resistance of the belt 52 is relatively large, the belt 52 rotates according to the pulling-out operation of the support body 51, and the support body 51 can be pulled out smoothly. Further, when the left-right direction outer side of the sheet pile S ₁ is pulled out of the support 51, even if slippage between the lower surface and the belt 52 of the sheet pile S ₁ is generated, the blade 61 scraped is, the sheet pile S ₁ since scraped off of the left and right ends from the top of the support 51, it is possible to pull out reliably pair of support 51 from the lower surface of the sheet pile S _1.

The sheet stacking and conveying apparatus 2 having the above-described configuration is disposed at the exit of the sheet stacker on the most downstream side of the corrugator (not shown). An example of the operation of the stacking and conveying apparatus 2 for stacking sheets will be described. First, a sheet stacker, operation when the tall sheet mountain S ₁ to S ₃ reaches a predetermined height is discharged (i.e., when not performing the stacking operation of the sheet pile S ₁ to S ₃₎ Description To do.

As shown in FIG. 1, the upstream conveyor 3 conveys the plurality of sheet piles S _{1 to} S ₃ discharged from the sheet stacker through the slitter cutting line L in a state where they are lined up in the front-rear direction without gaps, It is sent to the stacking and conveying apparatus 2 in that state. Conveying apparatus 2 stacks transports remain aligned without a gap plural sheet pile S ₁ to S _3, which received from the upstream side conveyor 3 in the longitudinal direction, without stacking operation of the sheet pile S ₁ to S ₃ It is sent out to the downstream conveyor 4 as it is. At this time, each division conveyor 8 conveys the sheet piles S _{1 to} S ₃ in a state where all the division conveyors 8 are raised to the raised position. Thereafter, the downstream conveyor 4 conveys accept sheet pile S discharged from the stack conveying apparatus 2 to feed the sheet pile S ₁ to S ₃ to the storage line. Here, the stack conveyance device 2 simply functions as a normal conveyor that conveys the sheet piles S _{1 to} S ₃ horizontally.

Next, the operation when the short sheet crests S _{1 to} S ₃ that do not reach the predetermined height are discharged from the sheet stacker (that is, when the stacking operation of the sheet crests S _{1 to} S ₃ is performed) will be described. To do.

As shown in FIG. 1, the upstream conveyor 3 conveys the plurality of sheet piles S _{1 to} S ₃ discharged from the sheet stacker through the slitter cutting line L in a state where they are lined up in the front-rear direction without gaps, It is sent to the stacking and conveying apparatus 2 in that state. At this time, as shown in FIG. 14 (b), the stacking and conveying apparatus 2 waits until the _first sheet pile S ₁ reaches the dividing conveyor 8 and below the left and right ends of the sheet pile S _1. the split conveyor 8 positioned outside is lowered, a space 18 is formed below the left and right ends of the sheet pile S _1, leave this space 18 by moving the first pawl 6A.

Specifically, as the height of the first claw 6A becomes the insertable height between the conveying surface and the lower surface of the sheet pile S ₁ split conveyor 8 in the lowered position, the lift in the lifting drive unit 40A in a state of lowering the bracket 31A, the main frame 7 is moved in the lateral direction of the sheet pile S _1, the first pawl 6A to space 18 below the left and right ends of the sheet pile S ₁ in the main frame drive unit 20 Move. At this time, the claw support arm 32A that supports the first claw 6A has been moved to the protruding position by the linear motion mechanism 45A. Further, the nail support for supporting the second claw 6B is made by narrowing the front-rear direction moving frames 30A, 30B so that the positions of the first claw 6A and the second claw 6B in the front-rear direction coincide with each other. The arm 32B is moved to the retracted position by the linear motion mechanism 45B.

After the first sheet pile _{S 1} is transferred from the upstream side conveyor 3 to the division conveyor 8, FIG. 14 (a), the (b), the sheet presser 46A, the first sheet pile in 46B _{S 1} with pressing the upper surface, the first pawl 6A, the first lower sheet pile S ₁ is raised while moving forward, FIG. 15 (a), the (b), the first sheet pile the lower surface of the S _1, lifted position to higher than the second upper surface of the sheet pile S ₂ on the split conveyor 8 located behind. At this time, the belt lock mechanism 56 of the first claw 6A is kept locked (see FIGS. 11 and 12).

Furthermore, when lifting the left and right pair of first pawl 6A and supports the right and left ends of the sheet pile _{S 1,} FIG. 14 (a), the lowering the (b), the pair of left and right seat retainer 46A, 46B keep down the upper surface of the left and right ends of the sheet pile S ₁ Te. Thus, it is possible to effectively prevent the slippage between the lower surface of the sheet pile S ₁ and the belt 52 of the first pawl 6A.

The division conveyor 8 is driven so as to continue to convey the sheet piles S ₂ and S ₃ on the division conveyor 8 horizontally even after receiving the _first sheet pile S ₁ . When lifting the first sheet pile S ₁ on the split conveyor 8, since the first sheet pile S ₁ is to avoid interfering with the second sheet pile S _2, the first pawl 6A is divided conveyor 8 on sheet pile S ₂ of the conveying speed and whether the same it moves forward at a slightly faster rate (e.g. 100 to 110% of the speed of the transport speed of the sheet pile S ₂₎ than. At this time, the second claw 6B is moved forward at the same speed as that of the first claw 6A so as to keep the position of the first claw 6A in the front-rear direction. Here, the first claw 6A and the second claw 6B are moved in the front-rear direction by moving the front-rear direction moving frames 30A and 30B.

FIG. 15 (a), the (b), the after the first pawl 6A is lifted first lower surface of the sheet pile _{S 1} to a position higher than the second upper surface of the sheet pile _{S 2,} FIG. 15 ( as shown by arrows in a), the first pawl 6A, it is moved backward remain lifted first sheet pile S _1, the first sheet pile S ₁ of the second sheet pile S ₂ Position directly above. Longitudinal positioning of the first pawl 6A is, the detection signal of the rotation sensor provided in the drive pulley 12 of the split conveyor 8, the width dimension of the cardboard sheet (i.e. longitudinal length of the sheet pile S ₁₎ Based on. At this time, the 2nd nail | claw 6B is moved back at the same speed as the 1st nail | claw 6A so that the position of the 1st nail | claw 6A and the position of the front-back direction might correspond. Thus, the third sheet is located a first sheet pile S ₁ immediately after down on the second sheet pile S _2, to the rear by the second pawl 6B lift the second sheet pile S ₂ it is possible to start the operation of stacking on the mountain S _3.

Then, FIG. 16 (a), the (b), the outward in the left-right direction of the first sheet pile _{S 1} pull the first pawl 6A, the second on the first sheet pile _{S 1} splitting conveyor 8 down on top of the sheet pile S _2. That is, the first sheet pile S ₁ is in a state positioned over the second sheet pile S _2, by moving the pair of pawl support arms 32A simultaneously the retreat position in linear motion mechanism 45A, a first a first pawl 6A pulling outward in the left-right direction from the lower surface of the left and right ends of the sheet pile S _1, placing the first sheet pile S ₁ on the second sheet pile S _2. At this time, in order to smoothly pull out the first claw 6A, the belt lock mechanism 56 of the first claw 6A is set in a free state and the scraping blade 61 is moved relative to the support body 51 inward in the left-right direction. (See FIG. 13). Moreover, until the first pawl 6A is down the first sheet pile S ₁ on the second sheet pile S _2, the second pawl 6B is below the left and right end portions of the sheet pile S ₂ spaces 18 Move it to.

Here, between the first claw 6A is from lifting the first lower surface of the sheet pile S _1, until down the sheet pile S ₁ of the first over the second sheet pile S _2, the first pawl 6A Since the inertia force due to the change in the speed in the horizontal direction is applied to the _first sheet pile S1 in the state of being lifted in step ₁ , the balance of the first sheet pile S1 may be lost. In contrast, stacking transport device 2 of this embodiment, the first pawl 6A from lifting the first lower surface of the sheet pile S _1, the sheet pile S ₁ of the first of the second sheet pile S ₂ until down above, the sheet pressing 46A, to keep pressing the first upper surface of the sheet pile S ₁ at 46B, the first balance sheet pile S ₁ state of being lifted by the first pawl 6A collapses Can be prevented.

Then, immediately after the first pawl 6A is down the first sheet pile _{S 1} on the second sheet pile _{S 2,} as shown in FIG. 17 (a), (b) , the second pawl 6B, the 2 below the sheet pile S ₂ is raised while moving forward, lift the second lower surface of the sheet pile S ₂ to a position higher than the third upper surface of the sheet pile S _3. At this time, the belt lock mechanism 56 of the second claw 6B is kept locked. At this time, it split conveyor 8, the second pawl 6B even after lifting the second sheet pile S _2, and drives so that the sheet pile S ₃ on split conveyor 8 continues to transport horizontally. When lifting the second sheet pile S _2, since the second sheet pile S ₂ to avoid interfering with the third sheet pile S _3, the second pawl 6B, the sheet pile S ₃ on split conveyor 8 It is moved forward at a speed that is the same as or slightly faster than the transport speed. At this time, the first claw 6A is moved forward at the same speed as the second claw 6B so as to keep the second claw 6B in the same position in the front-rear direction.

After the second pawl 6B is lifted a second lower surface of the sheet pile S ₂ to a position higher than the third upper surface of the sheet pile S _3, as indicated by an arrow in FIG. 17 (a), the second pawl 6B It is moved rearward remain lifted second sheet pile S _2. At this time, the first claw 6A is moved backward at the same speed as that of the second claw 6B so as to keep the second claw 6B in the same position in the front-rear direction.

Thereafter, as shown in FIGS. 18A and 18B, the lifted second sheet pile S ₂ is lowered onto the third sheet pile S ₃ on the division conveyor 8. That is, by moving the pair of left and right claw support arms 32B to which the second claw 6B is attached simultaneously to the retracted position by the linear motion mechanism 45B, the second claw 6B is moved from the lower surfaces of the left and right ends of the _second sheet crest S2. Pull it outward in the left-right direction. At this time, in order to smoothly pull out the second claw 6B, the belt lock mechanism 56 of the second claw 6B is set in a free state, and the scraping blade 61 is relatively moved inward in the left-right direction with respect to the support body 51. . Until second pawl 6B is lowered a second sheet pile S ₂ on the third sheet pile S _3, the first pawl 6A, the third sheet pile S ₃ of space below the end portions 18 Move it to. Thus, when the fourth sheet pile (not shown) behind the third sheet pile S ₃ are present in succession were also down the second sheet pile S ₂ on the third sheet pile S ₃ immediately after, it is possible to start the fourth sheet mountain in stacking operation to lift the third sheet pile S ₃ in the first pawl 6A.

As described above, the stack conveyance device 2 does not stop the flow of conveyance of the plurality of sheet ridges S _{1 to} S ₃ received from the upstream conveyor 3, and the first, second, and third sheet ridges S _1. ˜S ₃ are stacked to form a tall sheet pile, and the sheet pile is sent to the downstream conveyor 4. The downstream conveyor 4 horizontally conveys the tall sheet pile received from the stack conveying device 2 and sends it out to the storage line.

Stacking transport device 2 described above, when the lift supporting the right and left ends of the sheet pile S ₁ at the left and right pair of first pawl 6A (or the second pawl 6B), multiplying around the belt on the outer periphery of the support 51 since blocking 52 rotates in the belt locking mechanism 56, it is possible to prevent the relative movement in the horizontal direction between the bottom of the cardboard sheet of the sheet pile S ₁ and the support 51 from occurring. As a result, when lifting the left and right end portions of the sheet pile S _1, the bottom of the cardboard sheet of the sheet pile S ₁ is becomes possible to prevent the hanging from the left and right ends toward the center by its own weight, the sheet pile it is possible to prevent the bottom of the cardboard sheet S ₁ is the bending.

Also, stacking transport device 2 described above, when lifting the left and right ends of the sheet pile S ₁ is supported by the first pawl 6A (or the second pawl 6B), a pair of left and right seat retainer 46A, lowers the 46B because pressing the upper surface of the left and right ends of the sheet pile S _1, it is possible to prevent slippage between the upper surface of the lower surface and the belt 52 of the sheet pile S ₁ effectively.

Also, stacking transport device 2 described above, when the lifting support from below the left and right ends of the sheet pile S ₁ at a first pawl 6A (or the second pawl 6B), depending on the deflection of the sheet pile S ₁ since the cushion 53 constituting the support 51 is deformed Te, can be prevented underside of the sheet pile S ₁ is to produce a bent at the contact portion between the left-right direction inner end of the support 51 of the first pawl 6A is there.

Stacking transport device 2 described above, when pulling out the first pawl 6A in the left-right direction outer side of the sheet pile S _1, since the unlock state of the belt locking mechanism 56, over the outer periphery of the support member 51 of the first pawl 6A The rotated belt 52 is allowed to rotate, and the first claw 6A can be pulled out smoothly.

Also, stacking transport device 2 described above, split conveyor 8, since a plurality of split conveyor 8 elevatable between the raised and lowered positions, depending on the lateral dimension of the sheet pile S ₁ to S ₃ by lowering the split conveyor 8 positioned below and outside the left and right end portions of the sheet pile S ₁ to S ₃ Te, below the left and right ends of the sheet pile S ₁ to S _3, the sheet pile S ₁ to S The arrangement space 18 of the first claw 6A and the second claw 6B for lifting the lower surface of the _third claw ₃ can be secured. Therefore, it is possible to cope with a plurality of types of sheet piles S _{1 to} S ₃ having different dimensions in the left-right direction, and at the exit of the sheet stacker that discharges sheet piles S _{1 to} S ₃ having different dimensions corresponding to various production lots. Suitable for installation.

Also, stacking transport device 2 described above, stacking a first sheet pile S _1, without stopping the flow of conveyance of the sheet pile S _2, S ₃ on split conveyor 8 on the second sheet pile S ₂ Furthermore, the first sheet crest S ₁ and the second sheet crest S ₂ that are stacked above and below the third sheet crest S ₂ without stopping the flow of conveyance of the sheet crest S ₃ on the dividing conveyor 8. ₃ can be stacked. Therefore, the cycle time required for stacking the sheet piles S _{1 to} S ₃ is short.

In addition, the stacking and conveying apparatus 2 performs the stacking operation of the sheet peaks S _{1 to} S ₃ by alternately using the first claws 6A and the second claws 6B. It is possible to stack without stopping the flow of conveyance.

Incidentally, the first sheet pile support device 1A, the first lower surface of the sheet pile S ₁ is stationary by raising to a higher position than the second upper surface of the sheet pile S _2, the lifting the first sheet pile has Although the second sheet pile S ₂ directly below S ₁ is is also possible to drive to wait in a state of rest until conveyed by split conveyor 8, in this way, the first sheet pile S ₁ the longer the time from lift up down on top of the second sheet mountain S _2.

In contrast, stacking transport device 2 described above, the first lower surface of the sheet pile S ₁ by raising to a higher position than the second upper surface of the sheet pile S ₂ in the first sheet pile support device 1A, the between the first sheet pile S ₁ is lifted up down on the second sheet pile S ₂ on the split conveyor 8, the first sheet to the rear remain lifted first sheet pile S ₁ Since the mountain support device 1A is moved, the cycle time required for stacking the sheet piles S ₁ and S ₂ is short.

As shown in FIGS. 14 to 18, when the sheet pile S ₁ is lifted, the balance of the sheet pile S ₁ is lost in the first sheet pile support device 1 </ b> A and the second sheet pile support device 1 </ b> B. to prevent the support guide 66A for supporting the front and rear sides of the sheet pile S ₁ lifted, it can be provided 66B. Support guide 66A on the rear side of the sheet pile _{S 1,} as shown in FIG. 14 (a), (b) , in order to prevent interference with the sheet pile _{S 2,} the front-rear direction moving frame 30A, with respect 30B It is provided to be movable up and down.

Meanwhile, as shown in FIG. 19, when the front-rear direction dimension of the sheet pile S ₁ fed from the upstream side conveyor 3 to the conveyor unit 5 is large, lifting the sheet pile S ₁ only by a pair of first pawl 6A, or unbalanced sheet mountain S ₁ was lifted, there is a possibility that the cardboard sheet at the bottom of the sheet mountain S ₁ that lifting or broken at the position of the first pawl 6A. Therefore, when performing the longitudinal dimension of the stacking operation large sheet pile S _1, as shown in FIGS. 20 to 22, the sheet pile S ₁ using both of the first pawl 6A and the second pawl 6B simultaneously Can be lifted.

That is, both pawls of the first pawl 6A and the second pawl 6B, while moving forward from the first lower sheet pile S ₁ of the plurality of sheet pile S _1, S ₂ being conveyed by the split conveyor 8 by raising, lifting the first lower surface of the sheet pile S ₁ without stopping the conveyance of the sheet pile S ₂ on the split conveyor 8 to a position higher than the second upper surface of the sheet pile S _2, the lifted his it can be 1 of the first pawl 6A as down over the sheet pile S ₁ second sheet pile on split conveyor 8 S ₂ and move the second pawl 6B.

In this way, a single sheet pile S _1, since the lifted at two positions apart back and forth, even if the front-rear dimension of the sheet pile S ₁ is larger, lift the sheet pile S ₁ well balanced stable it can, also, the bottom corrugated sheet of sheet mountain S ₁ is broken can be prevented when you lift the sheet mountain S _1.

In the above embodiment, the operation of stacking a plurality of sheet piles S _{1 to} S ₃ on a single sheet pile has been described. However, a plurality of sheet piles can be obtained by dividing the sheet piles S _{1 to} S ₃ into small openings by a sheet stacker. the S ₁ to S _3, it is also possible to stack such that a small number of the plurality of sheets mountain than its sheet pile _S 1 to S _3. This will be described below.

For example, as shown in FIG. 23, the height of the sheet piles S _{1 to} S ₃ discharged from the sheet stacker is equal to a predetermined height of the sheet pile discharged from the sheet stacker at the normal time (for example, a corrugated sheet 300 of A flute). The height of the sheet pile after stacking is the above when the sheet piles S _{1 to} S ₃ are stacked to form a single sheet pile. There are times when it exceeds the predetermined height.

At this time, the sheet crests S _{1 to} S ₃ are divided into small sheet batches S _{a1 to} S _a3 and S _{b1 to} S _b3 having a smaller number of sheets than the sheet crests S _{1 to} S _3. By stacking the sheet piles S _{a1 to} S _a3 and the sheet piles S _{b1 to} S _{b3 of} each small batch, the stacking operation can be performed to reduce the number of sheet piles S _{1 to} S ₃ .

That is, first, as shown in the upper right of FIG. 24, when the sheet pile _S a1 _{to S a3} in the number less small batch than the sheet pile _S 1 to S ₃ is built up on the sheet stacker, the sheet pile _{S a1} to discharge the ~S _a3 from the sheet stacker (the rest of the cardboard sheet, it piles up as a new sheet mountain _S b1 _{~S b3).} The height of the sheet pile _S a1 _{to S a3} is set at a height not exceeding the predetermined level when the sheet pile _S a1 _{to S a3} stacked together. Next, the sheet piles S _{a1 to} S _a3 of the small batch discharged from the sheet stacker are stacked by the stack conveying device 2 shown in FIG. 1 and sent to the downstream conveyor 4, and then waited on the downstream conveyor 4. At this time, the sheet piles S _{a1 to} S _a3 on the downstream conveyor 4 form a single sheet pile as shown in the upper left of FIG.

Here, the height of each of the sheet peaks S _{a1 to} S _a3 of the small batch is equal to the above-described predetermined height (that is, the height of the sheet peaks discharged from the sheet stacker at normal times) as the peak of the sheet peaks S _{a1 to} S _a3 . Set to the height divided by the number (number of picks). Thereby, when the sheet piles S _{a1 to} S _a3 of the small batch are stacked by the stacking and conveying device 2, the total height of the stacked sheet peaks S _{a1 to} S _a3 is discharged from the sheet stacker at the normal time. Can match the height of the sheet pile. In other words, the height of the sheet pile sent to the storage line can be made equal to the normal height.

Next, as shown in the lower right of FIG. 24, the sheet piles S _{b1 to} S _b3 of the small batch are discharged from the sheet stacker. Thereafter, the sheet stacks S _{b1 to} S _b3 of the small batch discharged from the sheet stacker are stacked by the stack conveying device 2 shown in FIG. 1, sent to the downstream conveyor 4, and the sheet stack (sheet) waiting on the downstream conveyor 4 Combine the piles S _{a1 to} S _a3 ). Finally, as shown in the lower left of FIG. 24, the downstream conveyor 4 is formed by stacking a single sheet pile formed by stacking sheet piles S _{a1 to} S _a3 , and sheet piles S _{b1 to} S _b3. A single sheet pile is sent to the storage line in an adjacent state.

As described above, the sheet crests S _{1 to} S ₃ shown in FIG. 23 are changed to the sheet crests S _{a1 to} S _a3 of the small batch having a smaller number of sheets than the sheet crests S _{1 to} S ₃ as shown on the right side of FIG. By dividing and feeding to the stacking and conveying apparatus 2, it is possible to stack a plurality of sheet peaks (see the lower left in FIG. 24) that are smaller than the number of sheet peaks S _{1 to} S ₃ shown in FIG. 23. It becomes.

  In the above embodiment, the scraper blade 61 that contacts the surface of the belt 52 as the belt feeding portion 60 that moves the portion of the belt 52 above the support body 51 relative to the support body 51 inward in the left-right direction. In the above description, the scraper blade 61 and the scraper actuator 62 for moving the scraper blade 61 relative to the support 51 have been described as examples. However, other types of belt feeding units 60 may be employed. For example, it is possible to employ a belt feeding unit 60 including a roller that contacts the back surface of the belt 52 and a motor that rotationally drives the roller.

  In the above-described embodiment, the stacking and conveying apparatus for stacking sheets including the sheet stack supporting apparatuses 1A and 1B of the present invention has been described. However, the sheet stack supporting apparatus of the present invention can also be incorporated in other apparatuses. For example, the left and right ends of the sheet pile may be supported from below and lifted, and the sheet pile may be incorporated into a device that lowers the sheet pile to another place (for example, the upper surface of a pallet or the like). Even in this way, the left and right ends of the sheet pile can be supported and lifted by a pair of left and right support members without causing bending of the lowermost corrugated cardboard sheet, and the sheet pile can be lowered smoothly. It becomes.

  In the above-described embodiment, the structure in which the left and right support bodies 51 are each provided with the belt 52 has been described as an example. However, the structure in which only one support body 51 is provided with the belt 52 may be employed.

  In the above embodiment, the sheet pile support devices 1A and 1B for supporting the sheet piles of corrugated cardboard sheets have been described as examples. However, the present invention is a sheet pile support apparatus formed by stacking sheets other than cardboard sheets. It can also be applied to. For example, the present invention can be applied to a sheet pile support device that supports a sheet pile formed by stacking paperboard sheets.

1A, 1B Sheet pile support device 5 Conveyor unit 8 Dividing conveyor 18 Space 45A, 45B Linear motion mechanism 46A, 46B Sheet presser 51 Support body 52 Belt 53 Cushion 54 Seat plate 56 Belt lock mechanism 57 Belt lock member 58 Lock actuator 60 Belt feed Part 61 Scraping blade 62 Scraping actuator S _{1 to} S ₃ sheet pile

Claims (9)

A pair of left and right supports (51) for supporting the left and right ends of the sheet pile (S ₁ ) formed by stacking the sheets from below;
Belt wound around rotatably on the outer periphery of the support so as to be movable (51) in the lateral direction of the sheet pile contact surface (S ₁₎ for the right and left ends of the sheet pile (S ₁₎ (52)
A belt lock mechanism (56) capable of switching between a locked state that prevents rotation of the belt (52) and a free state that allows rotation of the belt (52);
A linear motion mechanism (45A) for moving the support body (51) horizontally so as to be pulled out to the outside in the left-right direction of the sheet pile (S ₁ );
When the left and right ends of the sheet pile (S ₁ ) are supported by the support (51), the belt lock mechanism (56) is locked, and the support (51) is placed on the sheet pile (S ₁ ). A seat pile support device that puts the belt lock mechanism in a free state when pulling it outward in the left-right direction. Sheet pile according to claim 1 further comprising a said support (51) in the supporting sheets mountains (S ₁₎ pair of left and right seat retainer which vertically movably provided to press the upper surface of the left and right ends of the (46A) Support device. The support (51) includes a cushion (53) that is deformed in accordance with the deflection of the seat pile (S ₁ ) when the left and right ends of the seat pile (S ₁ ) are supported from below, and the cushion (53 The sheet pile supporting device according to claim 1 or 2, further comprising a metal seat plate (54) that supports the metal seat plate (54).   The belt lock mechanism (56) contacts the belt (52) to prevent the belt (52) from rotating, and the unlocking position allows the belt (52) to rotate away from the belt (52). And a lock actuator (58) for moving the belt lock member (57) between the lock position and the lock release position. 4. The seat pile support device according to any one of items 1 to 3. When the support body (51) is pulled out to the outside in the left-right direction of the sheet pile (S ₁ ), a portion of the belt (52) above the support body (51) is located with respect to the support body (51). The seat pile support device according to any one of claims 1 to 4, further comprising a belt feeding portion (60) that relatively moves inward in the left-right direction. The belt (52) is configured such that its front surface has a larger coefficient of friction than the back surface;
The belt feeding section (60) includes a scraping blade (61) that contacts the surface of the belt (52) at positions adjacent to the left and right ends of the sheet crest (S ₁ ), and the scraping blade (61). A scraping actuator (62) that moves relative to the support (51);
The right and left direction when pulled outward in the left-right direction, the scraping actuator (62) said scraping blade (61) relative to said support (51) of the support (51) Sheet pile (S ₁₎ The portion of the belt (52) above the support (51) is moved by the frictional force generated between the scraping blade (61) and the surface of the belt (52). The seat pile support device according to claim 5, wherein the seat pile support device is moved relatively inward in the left-right direction with respect to the support (51). A conveyor unit (5) that conveys a plurality of sheet piles (S ₁ , S ₂ ) arranged in the front-rear direction forward in a state in which a space (18) is formed below the left and right ends thereof;
A sheet pile support device (1A) for supporting the left and right ends of the first sheet pile (S ₁ ) among the plurality of sheet piles (S ₁ , S ₂ ) on the conveyor unit (5);
The first sheet crest (S ₁ ) supported by the sheet crest support device (1A) is raised while moving forward at a speed equal to or faster than the conveying speed of the conveyor unit (5). Thus, the first sheet pile (S ₁ ) is lifted to a position higher than the upper surface of the second sheet pile (S ₂ ) on the conveyor unit (5) located behind the _first sheet pile (S ₁ ). A stack of sheet piles for lowering the sheet pile (S ₁ ) on the second sheet pile (S ₂ ),
A stack of sheet piles using the sheet pile support device according to claim 1 as the sheet pile support device (1A). The sheet pile supporting device (1A) lifts the first sheet pile (S ₁ ) to a position higher than the upper surface of the second sheet pile (S ₂ ), and then lifts the first sheet pile ( the S ₁₎ until down on said conveyor unit (5) on the second sheet pile (S _2), is moved backward in the state where the lifted first sheet pile (S ₁₎ The stack conveyance apparatus of the sheet pile of Claim 7. Said conveyor unit (5), the consist sheet pile plurality of split conveyor arranged in the lateral direction of _(S 1, _{S 2)} (8), the respective divided conveyor (8), the sheet pile _(S 1, _{S 2} ) And a lowering position where the conveying surface separates from the lower surface of the sheet pile (S ₁ , S ₂ ), and can be moved up and down. by out sheet pile (S ₁₎ left and right ends of the lower and lower the split conveyor (8) located on the outside to form the under the left and right ends of the sheet pile (S ₁₎ space (18) The stacking and conveying apparatus for stacking sheets according to claim 7 or 8.

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