JP2000103529A - Sheet separating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive sheet separating device excellent in working efficiency, capable of elevating/lowering stacked sheets in a stable condition. SOLUTION: A plurality of claws of a second fork 14 projected into gaps of a plurality of claws of a first fork 12 and retracted to a back side of a mast 7 by a cylinder 26 are fitted to the mast 7 inclined toward the back side, and while the first fork 12 is elevated with stacked sheets 4 loaded thereon, the stacked sheets 4 are transferred to the second fork 14, and the first fork 12 is lowered to the lowered end position. While the preceding stacked sheets are separated, the next stacked sheets 4 to be carried in from a carrying table 3 are received in a waiting condition, and a plurality of stacked sheets 4 can be continuously separated with little interruption.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet separating apparatus for separating and feeding a predetermined number of laminated sheets from an upper layer side.

[0002]

2. Description of the Related Art Japanese Unexamined Utility Model Publication No. 4-127338 discloses a sheet separating apparatus used for supplying a paperboard such as a corrugated cardboard sheet to a sheet processing step such as printing. 64-11
There is one disclosed in Japanese Patent No. 539.

In the former, as shown in FIG.
A sheet separation unit 54 attached to a lifting frame 53 is disposed above the laminated sheet 52 placed on the stacking unit 1, and a receiving arm 55 provided on the separation unit 54.
A predetermined number of sheet bundles 56 from the upper layer of the laminated sheet 52.
Then, the separation unit 54 is horizontally moved along the elevating frame 53, and the sheet bundle 56 is transferred to the conveyor 57 at the discharge end. In this apparatus, the conveyor 51 on which the laminated sheet 52 is placed is also moved up and down by the chain 58.

In the latter, as shown in FIG. 14, a sheet separating unit 61 is arranged above a laminated sheet 60 placed on a roller table 59 which moves up and down.
In step 1, a predetermined number of sheet bundles 62 from the upper layer of the laminated sheet 60
Is separated, and the rear edge of the separated sheet bundle 62 is pressed forward and sent to the conveyor 63 at the discharge end.

[0005] In each of the above-mentioned sheet separating devices, the laminated sheet to be separated is placed on a single conveyor or a roller table and moved up and down.
Until the conveyor or roller table is returned to the standby position,
There is a problem that the next laminated sheet cannot be accepted and the working efficiency is poor. In addition, since the laminated sheet to be separated is vertically moved up and down, there is a problem that the laminated sheet is shifted in the front-rear and left-right directions, so that the end faces become irregular and the load is easily collapsed. Furthermore, since the laminated sheet is moved up and down together with the conveyor or the like, there is a problem that the elevating device is large and expensive.

It is an object of the present invention to provide an inexpensive sheet separating apparatus which has high working efficiency and can raise and lower a laminated sheet in a stable state.

[0007]

In order to solve the above-mentioned problems, a sheet separating apparatus according to the present invention includes a lifter that raises a laminated sheet carried into a supply end along a mast;
Means for stopping the lifter at a predetermined rising position, and a pusher for sending a predetermined number of sheets stacked on the upper layer of the laminated sheet to a discharge end at each stop position of the lifter. A first fork formed by a plurality of first protrusions protruding upward and downward to the side;
A second fork formed by a plurality of second protrusions that move up and down in a gap between the plurality of first protrusions, and the second protrusion is formed so as to be retractable to the back side of the mast. It was done.

[0008] That is, while the first fork places the laminated sheet on the first protruding body and rises, the second protruding body of the second fork is protruded toward the front side of the mast, and the laminated sheet is removed. By transferring the stacked sheet to the second protruding body and lowering the first fork to the lower end position, while the previous stacked sheet is subjected to the separation processing, the next stacked sheet to be carried in is moved to the first position.
You can receive it on a fork and put it on standby. Therefore, a plurality of laminated sheets can be continuously separated with almost no interruption.

[0009] By inclining the mast to the rear side, the laminated sheet lifted by the first and second forks can lean on the mast and stably move up and down.

The first protruding body is mounted orthogonally to the mast, and a lever which is rotatable in a vertical plane parallel to the first protruding body is mounted around a tip of the first protruding body as a fulcrum. When one fork is at the lower end position, the lever is held horizontally, and when the first fork is raised above the lower end position, the lever is held in the same plane as the first protrusion. By providing the means, the laminated sheet carried in along the horizontal plane can be smoothly received on the horizontal lever,
The laminated sheet received with the rise of the fork can be placed on the inclined first protrusion.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS.
An embodiment of the present invention will be described. As shown in FIG. 1, the sheet separating apparatus basically includes a lifter 1 and a pusher 2, and lifts a cardboard laminated sheet 4 carried in from a transfer table 3 by the lifter 1 to form a predetermined number of sheet bundles 5. From the upper layer of the laminated sheet 4 to the conveyor 6 by the pusher 2. The lifter 1 is arranged with its mast 7 inclined to the rear side, and the pusher 2 is mounted on a portal trolley 9 inserted into a rail 8 orthogonal to the mast 7. As shown in FIG. 9, an optical sensor 10 for detecting the upper end of the laminated sheet 4 is also attached to the cart 9.

As shown in FIG. 2 and FIG. 3, the lifter 1 has a first fork 12 having five claws 11 as a plurality of projecting bodies, and a plurality of A second fork 14 having four claws 13 as a protrusion is provided. The first fork 12
With the pulley 15 and the belt 16 attached to the upper and lower ends of the mast 7, the second fork 14 is independently raised and lowered by a sprocket 17 and a chain 18 shown in FIG. Each of the forks 12 and 14 is configured to temporarily stop rising when the upper end of the laminated sheet 4 reaches a predetermined height position based on a signal from the optical sensor 10. A feed roller 1 described later is provided on the top of the mast 7.
9 and a plurality of stopper plates 20 that can be tilted toward the rear side of the mast 7 and are urged to be upright by a spring.

Each of the claws 11 of the first fork 12 is formed in a frame shape, and as shown in FIG. 4, a rotatable lever 21 which is fitted into the frame of the claw 11 is pivotally attached to a tip end thereof. ing.
Each lever 21 has a center of gravity on the base end side of the claw 11,
The base end is attached with a longer arm length.
Therefore, as shown in FIG. 4A, when the fork 12 is at the lower end position, the lever 21 supports the arm on the side of the center of gravity with the support 22 attached to the floor below the fork 12. The stacked sheet 4 is transferred from the transport table 3 onto the horizontally held lever 21. Further, as shown in FIG. 4B, when the fork 12 moves up from the lower end position and the center-of-gravity-side arm of the lever 21 leaves the cradle 22, the center-of-gravity-side arm is attached to the frame of the claw 11. It is stored in the same plane as the claw 11 while being supported by the receiving plate 23. Therefore, the laminated sheet 4 is transferred onto each of the inclined claws 11 and rises while leaning on the mast 7.

As shown in FIG. 5, the second fork 14 comprises a base 24 attached to a chain 18 and claws 13 which slide on the upper surface of the base 24 back and forth.
The claw 13 is bent near the base end and housed in the gap of the mast 7. At the upper end of the mast 7, two sprockets 17 connected vertically by a shaft 25 are attached, and this shaft 25 is a cylinder 26 installed on the back side of the mast 7,
The lower sprocket 17 is rotated together with the lower sprocket 17. The shaft 25 is formed to have a length approximately half the height of the mast 7, and the second fork 14 moves up and down only at the top of the mast 7.

The rotation of the shaft bar 25 toward the mast 7 by the cylinder 26 is performed when the first fork 12 has risen to the upper part of the mast 7, and as shown in FIGS. 6 and 7, The base 24 is pushed out to the front side of the mast 7, and the bent claws 13 are extended to receive the laminated sheet 4.

At the base of each of the claws 13, a pin 27 projecting to both sides is attached, and this pin 27 is hooked on an angle member 28 attached to the mast 7. Therefore, while the base 24 is being pushed out to the front side, the base of the claw 13 is restrained by the angle member 28 and the movement to the front side is stopped.
, And the tip of the claw 13 is supported by a support roller 29 attached to the front side of the base 24 and is raised straight. The support roller 2 is provided on the lower surface of the claw 13.
A stopper 30 that is pressed against the stopper 9 to restrain the claw 13 from moving backward is also attached.

When the plurality of claws 13 of the second fork 14 are extended, the plurality of claws 11 of the first fork 12 are lowered through the gap between the claws 13, and the laminated sheet 4 is moved to the slightly lowered position. Hand over the claw 13 of the second fork 14
It further descends and reaches the descending end position. Therefore, while the preceding laminated sheet 4 is being separated, the next laminated sheet 4 to be carried in is received and waited on the first fork 12, so that the plurality of laminated sheets 4 can be hardly interrupted. Can be continuously separated.

As shown in FIGS. 8 and 9, the gate-shaped cart 9 is moved forward and backward along the rail 8 by a motor 31, and the pusher 2 is attached to the center of the gate-shaped cart 9 in the width direction. I have. The gate-shaped trolley 9 slides up and down following the upper surface of the laminated sheet 4, and the laminated sheet 4
A push plate 32 that is pressed against the upper surface of the laminated sheet 4 to prevent the laminated sheet 4 from laterally shifting is also attached. Further, the optical sensor 10 is also attached to the gate-shaped trolley 9 adjacent to the pusher 2. The three optical sensors 10 are arranged at different upper and lower positions so as to be properly used according to the thickness of the sheet bundle 5 to be sent.

The pusher 2 is, as shown in FIG.
A first pushing cylinder 33 attached to the gate-shaped trolley 9, and a connecting fitting 34 connected to the first pushing cylinder 33.
, A push plate 36 pressed against the rear edge of the laminated sheet 4 attached to the second push cylinder 35, and a first push cylinder 33. The sheet bundle 5
And a pressing plate 37 for pressing the upper surface of the laminated sheet 4 after being extruded.

The first push-out cylinder 33 is pivotally attached to a fitting 38 fixed at both ends to the gate-shaped carriage 9 and the connecting fitting 34 so as to be tiltable. A base fitting 40 that is tilted by a cylinder 39 is pivotally attached to the gate-shaped trolley 9, and a guide rod 41 for the first extruding cylinder 33 is attached to a lower surface of the base fitting 40.

The second extruding cylinder 35 is mounted on the lower surface of the connection fitting 34 together with the guide rod 42, and the extruding plate 36 is mounted on the tip thereof. The holding plate 37 is attached to the front side of the connecting fitting 34 with a fitting 43, and is rotated up and down by a cylinder 44.

Hereinafter, a procedure for sending the sheet bundle 5 to the conveyor 6 will be described with reference to FIGS.
As shown in FIG. 10, the portal cart 9 advances in advance to the rear edge of the laminated sheet 4, and the push plate 32 is pressed against the upper surface of the laminated sheet 4. The lifter 1 stops at a position where the upper end of is detected.

Next, as shown in FIG. 11, the first extruding cylinder 33 is driven, and the extruding plate 36 advances integrally with the second extruding cylinder 35 so that the upper sheet bundle 5 of the laminated sheet 4 is formed. Is pushed out from the upper end of the stopper plate 20 onto the feed roller 19, and simultaneously, the pressing plate 37 is pushed by the cylinder 44 on the upper surface of the laminated sheet 4 after the sheet bundle 5 is pushed out, and The sheet is prevented from being taken out together with the sheet bundle 5 or disturbed. At this time, the stopper plate 20 restrains the sheet that comes into contact with the lower side of the sheet bundle 5 and is to be taken out by the frictional force while tilting and buffering the sheet.

When the pressing plate 37 presses the upper surface of the laminated sheet 4 to restrict the movement of the lower sheet of the sheet bundle 5, the second pushing cylinder 35 is driven, and as shown in FIG. When the plate 36 advances further and the sheet bundle 5 is sent out onto the conveyor 6, the pressing plate 37 is opened upward. After that, the extruding plate 36 and the pressing plate 37 are separated by the two extruding cylinders 33 and 35, as shown in FIG.
Is returned to the position shown in. By repeating the above procedure, the appropriate number of sheet bundles 5 are sequentially sent out from the upper layer of the laminated sheet 4 onto the conveyor 6, and the remaining sheets on the upper part of the laminated sheet 4 are not disturbed.

[0025]

As described above, the sheet separating apparatus of the present invention is provided with a plurality of second protrusions of a second fork which moves up and down in a gap between a plurality of first protrusions of the first fork which moves up and down the mast. Since the second protruding body is formed so as to be retractable to the rear side of the mast, the laminated sheet is transferred onto the second fork while the first fork is placing the laminated sheet and moving upward. By lowering the fork to the lower end position, the next stacked sheet to be carried in can be received, and the plurality of stacked sheets can be continuously separated with almost no interruption. Further, since the mast is inclined to the rear side, the laminated sheet lifted by the first and second forks can be leaned on the mast, and can be stably moved up and down. Further, a rotatable lever is attached to the distal end of the first protruding body, and the lever is held horizontally at the lower end position of the first fork, and held in the same plane as the first fork when ascending. As a result, the laminated sheet carried in along the horizontal plane can be smoothly received on the horizontal lever, and the received laminated sheet can be placed on the inclined first protrusion as the first fork is raised.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a sheet separating apparatus.

FIG. 2 is a side view showing the lifter unit of FIG. 1;

FIG. 3 is a sectional view taken along the line III-III in FIG. 2;

FIGS. 4A and 4B are front views showing the first fork of FIG. 1 in an enlarged manner, respectively.

FIG. 5 is an enlarged front view showing a second fork in FIG. 1;

FIG. 6 is a front view showing a state in which the second fork in FIG. 5 is straightened;

FIG. 7 is a sectional view taken along the line VII-VII of FIG. 6;

FIG. 8 is a side view of the pusher section of FIG. 1 along the line VIII-VIII.

9 is a side view of the pusher section of FIG. 1 along the line IX-IX.

FIG. 10 is a front view of the pusher unit of FIG. 1;

FIG. 11 is a front view illustrating the operation of the pusher unit of FIG. 10;

FIG. 12 is a front view illustrating the operation of the pusher unit in FIG. 10;

FIG. 13 is a front view showing a conventional sheet separating apparatus.

FIG. 14 is a front view showing another conventional sheet separating apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lifter 2 Pusher 3 Transport table 4 Laminated sheet 5 Sheet bundle 6 Conveyor 7 Mast 8 Rail 9 Truck 10 Optical sensor 11 Claw 12 Fork 13 Claw 14 Fork 15 Pulley 16 Belt 17 Sprocket 18 Chain 19 Roller 20 Stopper plate 21 Lever body 22 Receiver Stand 23 Receiving plate 24 Base 25 Shaft bar 26 Cylinder 27 Pin 28 Angle member 29 Roller 30 Stopper 31 Motor 32 Push plate 33 Cylinder 34 Connection fitting 35 Cylinder 36 Extruding plate 37 Press plate 38 Metal fitting 39 Cylinder 40 Base metal fitting 41, 42 Guide Rod 43 Metal fitting 44 Cylinder 51 Conveyor 52 Laminated sheet 53 Elevating frame 54 Separation unit 55 Receiving arm 56 Sheet bundle 57 Conveyor 58 Chain 59 Roller table 60 Lamination Over preparative 61 separation unit 62 sheet stack 63 conveyor

Claims (3)

[Claims] 1. A lifter for raising a laminated sheet conveyed to a supply end along a mast, means for stopping the lifter at a predetermined rising position, and an upper layer of the laminated sheet at each stop position of the lifter. A first fork formed by a plurality of first protrusions that project upward and downward from the front side of the mast, the pusher being configured to push out a predetermined number of sheets stacked on the mast to a discharge end; A second projection formed by a plurality of second projections that move up and down in the gap between the projections
A sheet separating device having a fork, wherein the second protrusion is formed so as to be retractable to the rear side of the mast. 2. The sheet separating apparatus according to claim 1, wherein the mast is inclined rearward. 3. The first protruding body is mounted orthogonally to a mast, and a lever body rotatable in a vertical plane parallel to the first protruding body with a tip portion of the first protruding body as a fulcrum. When the first fork is attached to the lower end position, the lever is held horizontally, and when the first fork is raised above the lower end position, the lever is the same as the first protrusion. 3. The sheet separating apparatus according to claim 2, further comprising means for holding the sheet in a plane.