JP2001294359A - Sheet stacking and feeding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet stacking and feeding device capable of achieving high speed stacking of sheet of short length, and securely separating the sheets into batched for every set number. SOLUTION: A hopper part 10 is provided on the front side of a pair of feed rollers 1a and 1b, and an elevation table drive to elevate is provided at a part of the part 10. On a pair of a right and a left endless chains 62, a straight running part 62a movable in parallel to an upper surface of the elevation table 40, and an elevation running part 62b continuous with an end part of the straight running part 62a and vertically movable between mutually facing parts of the feed rollers 1a and 1b and the hopper parts 10 are provided. A batch separating sheet support body 63 is installed between the chain 62, sheets (a) are supplied from the feed roller 1a and 1b to the hopper part 10 in a stand-by condition where the sheet support body 63 is stopped at the elevation running part 62b and stacked on the table 40. When a set number of the sheets (a) are fed to the hopper part 10, the sheet support body 63 is moved to the straight running part 62a for separating the sheets (a) into batches.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for stacking and feeding a predetermined number of sheets such as a flat box formed by a folder gluer and sending the stacked sheets to a next step such as a binding apparatus. .

[0002]

2. Description of the Related Art Blanks, which are a material for forming a cardboard box, are supplied to a folder gluer.
Conventionally, a flat box is formed by bending the panel at 0 ° and bonding the overlapping portions of the panels at both ends thereof with an adhesive.

[0003] The boxes formed by the folder gluer are usually stacked in a set number, supplied to a binding device, and bound by the binding device.

[0004] In stacking the boxes, there is an under stacker system in which the next box is supplied below the box which is sent and stopped and the boxes are stacked from below, and There is known an upper stacker system in which the next box is supplied on a box to be stacked and sequentially stacked from above.

By the way, in the under stacker system, since the next box body is made to enter the lower surface side of the previously stacked box bodies, resistance during stacking is large. At this time, the adhesive for bonding the panels of the box is not completely solidified, and the bonding of the panels is incomplete. Therefore, when the boxes are stacked, the panels bonded to each other are relatively shifted. There is an inconvenience that movement and defective products are often generated.

On the other hand, in the upper stacker system, since the next box is stacked on the previously stacked boxes, there is no resistance at the time of stacking, and the possibility that defective products are generated is extremely small.

[0007] As a stacking and feeding device in which sheet-like objects such as flat boxes are stacked by an upper stacker method, a device described in JP-A-7-228410 is known.

In the stacking and feeding apparatus described in the above publication, a work (sheet) fed from a pair of upper and lower rollers is received by a table, and the sheet is stacked on the table while the table is lowered. When a predetermined number of sheets are stacked, a holder is placed on the uppermost sheet, and the next sheet to be fed is received by the holder to batch-divide the sheets. In this case, the stacked sheets on the table are discharged while the sheets are stacked on the holder.

Further, after discharging the stacked sheets, the table is raised, and when the table is raised to the upper limit position, the holder is retracted to drop and discharge several sheets on the holder onto the table. Then, the table is lowered to continue stacking the sheet-like objects.

[0010]

By the way, in the collecting and feeding apparatus described in the above publication, the holder for batch-separating the sheet-like material has a length corresponding to the maximum length of the sheet-like material. Because it is always moved back and forth by a fixed stroke, it takes time to support and release the minimum length of sheet material, and it can respond to the case where a short length of sheet material is sent at high speed. There is a disadvantage that it cannot be done.

[0011] Further, since the batch-separating holder is moved in the direction opposite to the moving direction of the sheet-like material sent out from the pair of rollers to perform batch-separation of the sheet-like material, the feeding speed of the sheet-like material is increased. When the speed becomes faster, the holder collides with the sheet material to be batch-divided, and there is also a disadvantage that the sheet material cannot be reliably batch-divided.

SUMMARY OF THE INVENTION An object of the present invention is to make it possible to increase the speed of stacking sheets having a short length, and to surely batch-separate sheets every set number of sheets even if the sheets are sent at a high speed. It is an object of the present invention to provide a sheet feeding device capable of stacking sheets.

[0013]

In order to solve the above-mentioned problems, according to the present invention, there is provided a front guide for aligning the leading ends of sheet-like materials in front of a discharge end of a conveying device for conveying the sheet-like materials. The front guide is provided with a hopper portion which can be adjusted in position according to the length of the sheet-like material, and a lifting table which is moved up and down is arranged below the hopper portion. When the sheet-like material dropped and discharged below the hopper is received by the elevating table moving downward and stacked, and a predetermined number of sheet-like materials are sent to the hopper, In a sheet-like material stacking and feeding device in which the next sheet-like material to be sent is supported by a separator device and the sheet-like materials are batch-divided, the separator device is arranged in a right and left direction. A straight running portion, comprising: an endless running body, and a seat support supported on both sides by the endless running body, wherein the endless running body moves substantially parallel to the upper surface of the elevating table; A lifting device that moves vertically between the conveying device and the opposing portion of the hopper unit, and stops the sheet support between the lifting devices to stack the sheet-like objects. The configuration adopts a configuration in which the sheet support is moved between the linearly traveling portions by the movement of the endless traveling body at the time of batch separation of the sheets to perform the batch separation of the sheets.

According to the above-described structure, when a predetermined number of sheets are stacked on the elevating table and the next sheet is batched,
Since the sheet support only needs to be moved by a distance corresponding to the length of the sheet material, it can sufficiently cope with the sheet material being fed at a high speed, and stacking of short sheet materials. Can be speeded up.

In addition, since the sheet support is moved in the same direction as the moving direction of the sheet-like material sent by the transport device, the sheet-like material is batch-divided, so that even if the sheet-like material is sent at a high speed. Thus, the sheet can be surely divided into batches.

Here, if lifting means for raising and lowering a pair of rotating bodies provided at both ends of the straight traveling portion of the endless traveling body are provided, the sheet-like materials stacked on the lifting table are lowered together with the lifting table. When the rotating body is lowered, the uppermost sheet-like material on the elevating table can be pressed by the sheet support,
It is possible to prevent the sheet-like object on the elevating table from moving while descending.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG.
Is a pair of upper and lower feed rollers 1a and 1b as a transport device.
Is fed into the hopper 10 disposed in front of the hopper.

Here, the sheet-like material a may be a flat box formed by a folder gluer, or may be a corrugated cardboard sheet punched into a predetermined shape.

The hopper unit 10 includes a front guide 11 for aligning the leading end of the sheet-like material a, a back guide 12 for aligning the rear end of the sheet-like material a, and a pair of side guides 13 for aligning both sides of the sheet-like material a. The back guide 12
Is a fixed arrangement, while a pair of side guides 13
Are adjustable in position to the left and right according to the width dimension of the sheet material a.

The front guide 11 includes a movable frame 15
Supported by The movable frame 15 has a pair of side plates 15a.
A front guide 11 is provided between the rear end portions.

Here, the front guide 11 may be fixedly supported by the movable frame 15 or movably supported by the back guide 12, and reciprocated by a constant stroke in the front-rear direction by the rotation of the eccentric cam. You may do so.

The movable frame 15 is supported by a guide device 16 so as to be movable in the front-rear direction, and the position of the movable frame 15 is adjusted by a position adjusting device 17 in the front-rear direction.

The guide device 16 is provided with a pair of guide rods 16a extending long in the moving direction of the sheet material a fed by the pair of feed rollers 1a and 1b at positions outside the pair of side plates 15a.
Thereby, the movable frame 15 is movably supported.

Further, as shown in FIG.
7 and a screw shaft 17a parallel to the guide rod 16a.
The screw shaft 17a is screw-engaged with a nut member 18 shown in FIG. 3 fixed to the outer surface of the side plate 15a, and the screw shaft 17a is rotated at a fixed position to move the movable frame 15 along the guide rod 16a. The front guide 11 is adjusted in position by the movement of the movable frame 17 in accordance with the length of the sheet-like material a.

On the lower surface side of the movable frame 15, a roller pressing device 20 is provided. Roller holding device 20
Is mounted on the lower surface of the movable frame 15.
A plurality of roller frames 20a extending in the direction of movement of the
A plurality of pressing rollers 20b are rotatably supported on both sides of the line a. The roller holding device 20 is configured such that when a stack A of a plurality of sheets a stacked in a set number is conveyed by a discharge conveyor device 30 provided therebelow, the uppermost sheet a of the stack A is conveyed. To prevent the laminate A from collapsing during transportation.

The discharge conveyor device 30 comprises a double-row belt conveyor 31 and a roller conveyor 32 connected to the discharge end of the belt conveyor 31. The supply end of the double-row belt conveyor 31 is the hopper section. It is arranged below 10. The height of the discharge conveyor device 30 is freely adjustable, and the height of the discharge conveyor device 30 is adjusted according to the height of the laminate A.

An elevating table 40 is provided below the hopper 10. As shown in FIG. 2, the elevating table 40 includes a plurality of parallelly disposed support bars 40 a extending in the moving direction of the sheet-like material a, and each of the support bars 40 a is disposed between the belt conveyors 31. Are supported by a table support 42 via the legs 41 of the table.

The table support 42 has arms 43 at both ends, and the upper part of each arm 43 is provided with a slide block 4 of a linear slide 44 provided outside the arm 43.
5 and is movably supported in the vertical direction.

The elevating table 40 is moved up and down by an elevating drive unit 46, and its upper limit stop position is determined by the hopper unit 10.
And the lower limit stop position is a position below the conveying surface of the belt conveyor 31.

Here, the lifting drive unit 46 engages the screw shaft 47 with the slide block 45 of the linear slide 44 and supports the screw shaft 47 rotatably at a fixed position. Is provided with a drive shaft 49 rotated by a lifting motor 48, and the rotation of the drive shaft 49 is transmitted to the screw shaft 47 via a gear (not shown) incorporated in the gear case 50.

As shown in FIG. 1, a pair of feed rollers 1
a, 1b are fed into the hopper 10 and fall on the hopper 10 are supported by the elevating table 40, and the elevating table 40 lowers the sheets a to be sequentially stacked and set in advance. When the number of sheet-like materials a is stacked, a pair of feed rollers 1a, 1b
The sheet-like material a sent from the hopper 10 to the hopper 10 is supported by the separator device 60 and divided into batches.

The separator device 60 includes a plurality of sprockets 61 as a rotating body, and the plurality of sprockets 61.
It has a pair of left and right chains 62 as an endless traveling body spanned therebetween, and a seat support 63 provided between the left and right chains 62.

The chain 62 has a linear running portion 62a which moves in parallel with the upper surface of the lifting table 40, and a pair of feed rollers 1a, 1a continuously connected to the end of the linear running portion 62a.
b and an elevating traveling part 62b extending in the vertical direction between the back guide 12 of the hopper part 10 are provided.

Note that a toothed pulley may be used instead of the sprocket 61 and a timing belt may be used instead of the chain 62.

The sheet support 63 is composed of a plurality of support bars arranged in parallel. The position where the sheet support 63 is stopped at the elevating / running section 62b provided on the chain 62 is set as a standby position, and the sheet support 6 is set at the standby position.
The stacking operation of the sheet-like material a is performed in a state in which 3 is stopped.

Of the plurality of sprockets 61 for guiding the movement of the chain 62, two sprockets are driving sprockets 61a and 61b, one driving sprocket 61a is driven by a forward motor 64, and the other driving sprocket 61b is retreating. Driven by the motor 65 for use.

Here, as shown in FIG. 1, the chain 62 moves forward by rotating the drive sprocket 61a in the direction of the arrow by the forward motor 64. The sheet support 63 stopped at the standby position by the forward movement of the chain 62 moves toward the hopper 10. On the other hand, by rotating the drive sprocket 61b in the direction of the arrow in FIG. 1 by the retraction motor 65, the seat support 63 moves toward the standby position.

The forward motor 64, a first projecting piece 66 provided on the chain 62 is adapted to stop the actuating the first limit switch LS _1, the sheet support 63 in its stopped state at a tip It is arranged at a position close to the front guide 11. Even if the limit switch LS ₁ is the front guide 11 is supported by the movable frame 15 is positioned adjusted according to the length of the sheet a by the movement of the movable frame 15, always constant relationship between the front guide 11 It is configured to keep.

On the other hand, in the retreating motor 65, the second protrusion 67 provided on the chain 62 has the second limit switch LS ₂
Is stopped, and the stop causes the sheet support 63 to be held at the standby position where the front part in the moving direction is located at the upper end of the elevating and running part 62b.

In controlling the stop positions of the sheet support 63 during forward and backward movements, servo motors are used as the forward motor 64 and the backward motor 65, and a rotary encoder is connected to the rotating shaft of the servo motor. The operation of each of the motors 64 and 65 may be controlled by counting the number of pulses output from the rotary encoder and outputting the counted number to the arithmetic processing unit, and calculating the arithmetic processing unit.

A pair of sprockets 61c and 61d provided at both ends of the linear running portion 62a of the chain 62 are moved up and down by the operation of the lifting cylinder 68, and the up and down movement of the pair of sprockets 61c and 61d causes the straight running portion to move. 62a is moved up and down, and the level at the upper limit position is lower than the supply level of the sheet-like material a sent by the pair of feed rollers 1a and 1b.

As shown in FIGS. 1 and 2, the hopper 1
A plurality of sheet receiving members 7 comprising rods
0 is provided. Each of these sheet receiving members 70 is advanced and retracted into and from the hopper 10 by the operation of the cylinder 71.

As shown in FIGS. 1 and 5, a sheet support 63 is provided on the back of the back guide 12 of the hopper 10.
A stopper plate 75 is provided to prevent the plurality of sheet-like materials a supported by the sheet support 63 from retracting together with the sheet support 63 when the sheet support 63 moves backward.

Reference numeral 73 shown in FIG. 1 denotes an air jet duct for jetting air from the pair of feed rollers 1a and 1b toward the upper surface of the sheet-like material a fed into the hopper 10.

The stacking and feeding device for a sheet-like material shown in the embodiment has the above-mentioned structure. When stacking the sheet-like materials a, as shown in FIG. And held at a standby position where the hopper 10 stops by a pair of feed rollers 1a and 1b.
Is supplied continuously to the sheet.

In this case, a detection sensor PH for detecting the passage of the sheet material a is provided in the supply path of the sheet material a.
The detection signal is output from the detection sensor PH to the counter to count the number of sheets a supplied. Then, the count value is output to the comparator. On the other hand, the number of stacked sheets a is input in advance as a set value to the comparator, and when the set value matches the count value, control is performed from the comparator. A signal is output to the control unit so that the control unit operates the forward motor 64 in advance.

When the sheet-like material a is supplied to the hopper 10 from the pair of feed rollers 1a and 1b, the sheet-like material a falls in the hopper 10 and is supported by the elevating table 40. The elevating table 40 is lowered according to the supply speed of the sheet-like material a, and the sheet-like material a supplied to the hopper unit 10 is sequentially stacked on the elevating table 40.

When a predetermined number of sheets a are supplied into the hopper 10, the forward motor 64 operates to move the pair of chains 62 forward. The sheet support 63 is moved to the hopper 1 by the forward movement of the pair of chains 62.
Moves toward the inside 0, the first projecting piece 66 actuates the first limit switch LS _1, the forward motor 64 is stopped, the sheet support 63, as shown in FIG. 4, its leading edge in the moving direction It stops at a position close to the front guide 11.

For this reason, the next sheet material a sent by the pair of feed rollers 1a and 1b is
Supported by 3 and batched.

After the batch separation of the sheet material a, the cylinder 6
8, the sprockets 61c and 61d located at both ends of the linear traveling portion 62a descend, and the linear traveling portion 62a temporarily lowers the upper surface of the stacked body A of the sheet-like materials a stacked on the elevating table 40 by the downward movement. Down.

The elevating table 40 continues to descend, and when the elevating table 40 descends near the lower limit stop position, as shown in FIG. 5, the stacked body A on the elevating table 40 is received by the belt conveyor 31, and the Conveyor 31
Is sent to the roller conveyor 32 to be sent to the next binding step or the like.

When the laminate A on the belt conveyor 31 is discharged from the lifting table 40, the lifting table 40
Rise (see FIG. 6).

The sheet-like material a supplied from the pair of feed rollers 1 a and 1 b to the hopper 10 until the lifting table 40 descends to the lower limit stop position and starts rising from the lower limit stop position is the sheet support 63. When several sheets a are stacked one on top of the other, the sheet receiving member 70 shown in FIG. 5 moves forward.

When the sheet receiving member 70 advances to the position facing the inside of the hopper section 10 and stops, the retraction motor 65 shown in FIG. 1 operates to rotate the driving sprocket 61b in the direction of the arrow in FIG.

The rotation of the drive sprocket 61b causes the chain 62 to retreat, and the sheet support 63 is moved to the hopper 1
Then, the sheet-like materials a supported by the sheet support 63 fall down and are supported by the sheet receiving member 70 (see FIG. 6).

The second projection 67 attached to the chain 62
Operates the second limit switch LS ₂ , the retraction motor 65 stops, and the seat support 63
Is stopped at the elevating traveling unit 62b.

After the chain 62 stops, the cylinder 68 operates to raise the pair of sprockets 61c and 61d located at both ends of the linear running portion 62a.

When the elevating table 40 moves to the upper limit stop position as shown in FIG. 7, the sheet receiving member 70 retreats, and several sheets a supported by the sheet receiving member 70 drop and move up and down. It is supported by a table 40.

When the sheet a is supported by the elevating table 40, the elevating table 40 is lowered according to the feeding speed of the sheet A, and the stacking of the sheet a is continued.
Thereafter, the same operation as described above is repeatedly performed.

When the length of the sheet-like material a supplied to the hopper 10 changes, the movable frame 15 is moved, and the position of the front guide 11 is adjusted according to the length of the sheet-like material a.

At this time, since the limit switch LS ₁ for controlling the forward motor 64 moves together with the movable frame 15, the sheet support 6 for batch-separating the sheet-like material a is provided.
3 is a hopper 10 having a distance corresponding to the length of the sheet material a.
As a result, the sheet-like material a having a short length is supplied at a high speed, so that it can sufficiently cope with it.

Further, the seat support 63 is provided with
b is a standby position, and from the standby position, the sheet-like material a is moved in the same direction as the feeding of the sheet-like material a to batch-divide the sheet-like material a. a can be surely divided into batches for each set number of sheets.

[0063]

As described above, according to the present invention, when batching sheets, it is only necessary to move the sheet support by a distance corresponding to the length of the sheet. Even if the sheet-like material is sent at a high speed, it is possible to sufficiently cope with it, and it is possible to speed up the stacking of the short-length sheet-like material.

Further, the sheet support at the standby position, which is stopped between the conveying device and the opposing portion of the hopper, is moved in the same direction as the moving direction of the sheet-like material sent from the discharge end of the conveying device to the hopper. I decided to batch things,
Even if the sheet is sent at a high speed, the sheet can be surely batched for each set number of sheets.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of an accumulation feeding device according to the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG. 1;

FIG. 4 is a cross-sectional view showing a state in which the sheet is batch-divided.

FIG. 5 is a cross-sectional view illustrating a state in which a set number of stacked sheets are discharged.

FIG. 6 is a cross-sectional view showing a state in which the discharge of the sheet is completed.

FIG. 7 is a cross-sectional view showing a state in which the next sheet-like material is started to be stacked on a lifting table.

[Explanation of symbols]

 a Sheet-like object 1a, 1b Feed roller (transport device) 10 Hopper unit 11 Front guide 40 Elevating table 60 Separator device 61c, 61d Sprocket (rotating body) 62 Chain 62a Linear running unit 62b Elevating running unit 63 Sheet support 68 Cylinder ( Lifting means)

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Minenori Ueno 2-15-28 Moundoshima, Nishiyodogawa-ku, Osaka F-term in Hamada Printing Machinery Co., Ltd. 3E075 AA02 BA01 BA82 DA05 DA12 DA14 DA15 DA35 FA03 FA25 GA01 3F054 AA04 AB01 BA02 BB07 BD02 BJ11 3F107 AA01 AB01 AC08 BA02 CA36 CD05

Claims (2)

[Claims] 1. A front guide for aligning the leading end of a sheet-shaped object is provided in front of a discharge end of a conveying device for conveying the sheet-shaped object, and the front guide can be adjusted in position according to the length of the sheet-shaped object. A hopper section is provided, and a lifting table which is moved up and down is arranged below the hopper section, and a sheet-like material which is fed into the hopper section from the transfer device and drops down and discharged below the hopper section is moved down and down. When a predetermined number of sheets are sent to the hopper, the next sheet sent from the transport device is supported by a separator device, and the sheet is received. In the sheet feeding device for stacking sheets, the separator device has a pair of left and right endless traveling bodies, and both sides are supported by the endless traveling bodies. A linear traveling part comprising a sheet support and moving substantially parallel to the upper surface of the elevating table on the endless traveling body, and between the conveying device and the opposing part of the hopper part continuously at the end of the linear traveling part. An elevating traveling unit that moves in the vertical direction is provided, the sheet support is stopped between the elevating traveling units to stack the sheets, and the sheet support is moved by the endless traveling body during batch separation of the sheets. An apparatus for feeding and stacking a sheet-like object, wherein the sheet-like object is batch-divided by being moved between linearly moving parts. 2. A lift means for lowering a pair of rotating bodies provided at the front and rear ends of a straight running portion of the endless running body while the sheet support supports a sheet-like material. Sheet feeding device.