JP2008143640A - Paper feeding hopper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paper feeding hopper capable of certainly feeding out a sheet block stored in a hopper section in a roof tile manner, sequentially from a lower sheet with the lap length held approximately constant. <P>SOLUTION: At a lower part of a hopper section 12, a thrust-up member 22 which lifts up and down and moves the rear end of a sheet block B up-and-down is provided. A supply conveyer 1 and a feed conveyor 10 are driven with the thrust-up member 22 set in a lift-up/down state, and the sheet block B which is fed into the hopper section 12 from the supply conveyor 1 is made to be fed out in sequence from a lower sheet S by contact with a carrying surface of the feed conveyor 10. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a paper feed hopper that continuously supplies a thick paperboard such as a corrugated cardboard sheet to a sheet processing machine such as a printing machine.

  As this type of paper feeding hopper, one described in Patent Document 1 is conventionally known. In the paper feed hopper described in Patent Document 1, a feed conveyor is provided in front of a carry-out end of a supply conveyor that conveys a sheet block consisting of a bundle of several cardboard sheets (hereinafter simply referred to as sheets) downstream. It is arranged with a step so that the conveying surface is located below the conveying surface of the supply conveyor, guides the front end surface of the sheet block fed from the supply conveyor onto the feed conveyor, and several sheets between the conveying surface of the feed conveyor A front guide member that forms a gate through which a sheet can pass and a rear guide member that is disposed so as to face the front guide member and that forms a hopper portion that can accommodate a seat block between the front guide member The sheet block sent to the hopper from the supply conveyor is driven from the lower sheet by driving the feed conveyor. And passed through a gate as sending a wrap state overlaps the roof tile shape.

JP 2000-118740 A

  By the way, the paper feed hopper described in Patent Document 1 has a configuration in which the next sheet is pulled out to the gate side by a frictional force that acts on a contact surface between the sheet fed from the gate and the next sheet superimposed thereon. Since the frictional force varies depending on the number of sheets accommodated in the hopper, the sheets may not be reliably delivered, and the wrap lengths between the sheets delivered in a roof tile shape are likely to be uneven. There is an inconvenience.

  Further, when the front end of the next sheet on the sheet fed from the gate is in contact with the front guide member and the rear end of the next sheet comes into contact with the transport surface of the feed conveyor, the stop state is brought about by contact with the front guide member. Since the conveyance force is applied to a certain next sheet and the next sheet is forcibly fed, there is a disadvantage that the leading end of the next sheet is bent.

  An object of the present invention is to provide a sheet feeding hopper that can reliably feed sheet blocks accommodated in a hopper section in a roof tile shape with a substantially constant wrap length in order from a lower sheet. .

  In order to solve the above-described problems, in the present invention, a feed conveyor is disposed in front of the carry-out end of the supply conveyor that conveys the sheet block, so that the conveyance surface is positioned below the conveyance surface of the supply conveyor, A front guide member for guiding a front end surface of a sheet block fed from the supply conveyor onto the feed conveyor and forming a gate through which several sheets can pass between the feed conveyor and a conveyance surface of the feed conveyor, and the front guide member A rear guide member that forms a hopper portion that can be accommodated between the front guide member and the front guide member, and the seat block received in the hopper portion by driving the feed conveyor A sheet feeding hopper which passes through the gate in order from the sheet of the sheet and feeds it in a lapping state overlapping the roof tiles. The hopper is moved up and down below the hopper section with the position below the conveying surface of the feed conveyor as a lower limit position, and when lifted, the rear end of the sheet block accommodated in the hopper is lifted up on the conveying surface of the feed conveyor A configuration is adopted in which a member is provided, and the lower sheet of the sheet block moved up and down by the raising and lowering of the push-up member is sent out from the gate to the downstream side by contact with the feed conveyor.

In the sheet feeding hopper having the above-described configuration, when feeding the sheet processing machine, the supply conveyor and the feed conveyor are driven in a state where the push-up member is moved up and down. The sheet block is fed into the hopper by driving the supply conveyor,
When the sheet block is supported by the feed conveyor, the sheet is sequentially fed from the lower sheet toward the gate by the feed conveyor.

  Here, during steady operation, the gate is set to a size that allows several sheets to pass, so the next sheet that overlaps several sheets is stopped and held by contact with the front guide member. When the next sheet is fed out from the gate, the next sheet faces the gate.

  At this time, when the push-up member that moves up and down moves up the sheet block accommodated in the hopper, the rear end of the conveying direction is lifted onto the conveying surface of the feed conveyor, and the rear end of the sheet is separated from the conveying surface of the feed conveyor. The conveyance force is reduced, and further, a gap is formed between several sheets fed out from the gate and the next sheet overlapping thereon to reduce the frictional resistance. For this reason, the next sheet is not dragged out by contact with the previous sheet.

  When the push-up member descends, the trailing edge of the next sheet on the sheet fed first from the gate descends to a position where it is supported by the conveying surface of the feed conveyor, and when the leading edge of the next sheet faces the gate, the feed conveyor Due to the contact with the transport surface, the next sheet is sent downstream toward the gate side. For this reason, each sheet of the sheet block is sequentially sent from the gate to the downstream side by the contact between the rear end portion and the conveying surface of the feed conveyor, and each sheet of the sheet block is overlapped like a roof tile and sent out in a lapped state. Will be.

  As described above, in the present invention, the rear end of the seat block is moved up and down by raising and lowering the push-up member whose lower limit position is lower than the conveying surface of the feed conveyor, and when it is lowered, Since the rear end of the sheet is brought into contact with the conveying surface of the feed conveyor, and the lowest sheet is sent to the downstream side by the contact, the sheet block accommodated in the hopper is placed on the lower sheet. Can be reliably sent in order.

  In addition, the next sheet on the sheet fed from the gate is lifted to a position away from the feed surface of the feed conveyor by a push-up member whose rear end moves up with the front end in contact with the front guide member. There is no such thing as being sent out. For this reason, it is possible to eliminate the inconvenience that the leading edge of the next sheet is bent.

  Also, when the rear end of the sheet comes into contact with the transport surface of the feed conveyor and the front end of the sheet faces the gate, the sheet is sent out by contact with the feed conveyor. It can be sent out in the overlapping lap state.

  Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a sheet block B composed of a plurality of sheets S is conveyed by a supply conveyor 1 in the direction indicated by the arrow (downstream side) in FIG.

  A feed conveyor 10 is provided in front of the carry-out end of the supply conveyor 1. As shown in FIGS. 1 and 2, the feed conveyor 10 is composed of a double-row belt conveyor 10a. The feed conveyor 10 is arranged with a step so that its conveying surface is positioned below the conveying surface of the supply conveyor 1.

  On the feed conveyor 10, a plate-shaped front guide member 11 that guides the front end face of the sheet block B fed from the supply conveyor 1, and a front guide member 11 that is disposed so as to face the front guide member 11. A plate-like rear surface guide member 13 that forms a hopper portion 12 in which the seat block B can be accommodated is provided.

  The front guide member 11 is slidably supported along a rail 14 a that is provided on the fixed frame 14 and extends in the vertical direction. A gate 15 is formed between the lower end of the front guide member 11 and the transport surface of the feed conveyor 10.

  A cylinder 16 is connected to the upper end of the front guide member 11. When the sheet S of the sheet block B is sent out from the hopper portion 12 and the sheet S is jammed in the gate 15, the cylinder 16 raises the front guide member 11 to eliminate the jam.

  On the other hand, the cylinder 16 is moved up and down by rotation of a screw shaft 17 as a lifting device. As the cylinder 16 moves up and down, the front guide member 11 also moves up and down at the same time and is adjusted in the vertical direction. The front guide member 11 is held at a position where about two to three sheets S pass from the gate 15 in the initial stage of operation, and when the sheet S is sent out from the gate 15, the front guide member 11 is lifted upward by the lifting device and in a steady operation state. The gate 15 is held at a position where several sheets S pass.

  The rear surface guide member 13 is connected to a fixedly arranged cylinder 16 and is moved back and forth toward the front surface guide member 11 by the operation of the cylinder 16, and the rear end surface of the seat block B accommodated in the hopper portion 12 when moving forward. To align the trailing edge of each sheet S of the sheet block B.

  Below the hopper portion 12 is provided a bar 20 that extends long in a direction intersecting with the conveying direction of the sheet S, and a plurality of guide cylinders 21 are provided on the rear surface of the bar 20 with both ends thereof being vertically arranged at intervals in the length direction of the bar 20. Installed and installed.

  As shown in FIG. 2, the guide cylinders 21 are arranged between the belt conveyors 10 a forming the feed conveyor 10 and on the outer sides of the belt conveyors 10 a on both sides, and the push-up members 22 can be raised and lowered by the guide cylinders 21. It is supported.

  As shown in FIGS. 4 and 5, the push-up member 22 has a structure in which a push-up piece 22b is provided at the upper end of a shaft portion 22a that is slidably supported in the vertical direction by the guide tube 21, and the lower end of the shaft portion 22a. The portion faces downward from the lower end of the guide tube 21, and a roller 23 is rotatably supported at the lower end.

  The push-up member 22 is urged downward by a spring 24 fitted to the shaft portion 22a, and the roller 23 is pressed against the upper outer periphery of an eccentric cam 26 provided on the cam shaft 25. The push-up member 22 is pushed up by the rotation of the eccentric cam 26. The member 22 is moved up and down.

  Here, as shown in FIG. 4 (I), the push-up member 22 has a lower limit position at which the upper surface of the push-up piece 22b is disposed below the transport surface of the feed conveyor 10, and when it is raised, FIG. As shown in FIG. 3, the push-up piece 22 b protrudes on the conveyance surface of the feed conveyor 10 and lifts the rear end portion of the sheet block B accommodated in the hopper portion 12 on the conveyance surface.

  The driving means for moving the push-up member 22 up and down is not limited to the eccentric cam 26 as described above. For example, the push-up member 22 may be moved up and down by a cylinder.

  The sheet feeding hopper shown in the embodiment has the above-described structure. When feeding a sheet processing machine (not shown) provided at the unloading end of the feed conveyor 10, the cam shaft 25 is rotated and the eccentric cam 26 is rotated. Each of the supply conveyor 1 and the feed conveyor 10 is driven in a state where the push-up member 22 is moved up and down.

  By driving the supply conveyor 1, the sheet block B is conveyed to the downstream side, and is fed from the carry-out end of the supply conveyor 1 to a hopper unit 12 provided on the conveyance surface of the feed conveyor 10.

  When the lowermost sheet S of the sheet block B accommodated in the hopper unit 12 is supported by the feed conveyor 10, the lowermost sheet S is conveyed toward the gate 15 by contact with the feed conveyor 10. At this time, since the front guide member 11 is held at a lowered position where about 2-3 sheets S are sent out from the gate 15, at the initial stage of sheet feeding, 2 to 3 sheets S are discharged from the gate 15. Will be sent out. When the front end portions of the two to three sheets S are sent out from the gate 15, the front guide member 11 is gradually raised by the rotation of the screw shaft 17 shown in FIG. 1, and several sheets from the gate 15 in the steady operation state. S is held in a state of being sent out.

  When the sheet S is sent out from the gate 15, the sheet block B in the hopper 12 is inclined so as to rise upward toward the downstream side as shown in FIG. 1, and several sheets S sent out from the gate 15. When the rear end of the lowermost sheet S passes through the gate 15, the rear end of the next upper sheet S overlapping the several sheets S comes into contact with the transport surface of the feed conveyor 10. The next sheet S is conveyed toward the gate 15 by the contact, and the sheets S are successively sent out in a lapping state overlapping with the roof tile shape.

  When the sheet S is transported as described above, the push-up member 22 is moved up and down by the rotation of the eccentric cam 26, and when the push-up member 22 is lifted, as shown in FIG. B is because the rear end of the conveying direction is lifted on the conveying surface of the feed conveyor 10, so that several sheets S sent out from the gate 15 and the next sheet S positioned above and lifted by the push-up member 22 The frictional resistance between the contact parts is reduced.

  For this reason, even if the front end of the next sheet S faces the gate 15, the next sheet S is not forcibly sent out by the feed conveyor 10 or dragged out by the previous sheet S, and is stopped. Retained.

  Further, when the push-up member 22 is lowered, the rear end portion of the next sheet S on the sheet S whose front end portion passes through the gate 15 is supported by the conveying surface of the feed conveyor 10 as shown in FIG. When the front end of the next sheet S faces the gate 15, the next sheet S is sent to the downstream side by contact with the transport surface of the feed conveyor 10.

  As described above, the sheet feeding hopper in the embodiment is configured to send the sheet S toward the gate 15 side by contact with the conveyance surface of the feed conveyor 10, and therefore the sheet block B accommodated in the hopper unit 12. The sheet S can be reliably sent out in order from the lower sheet S.

  Further, when the lowest sheet S of several sheets S sent out from the gate 15 passes through the gate 15, the rear end portion of the next sheet S continuing above the several sheets S is the transport surface of the feed conveyor 10. Since the next sheet S is sent out when the front end of the next sheet S faces the gate 15, the sheet S can be sent out in a lap state where the wrap length is substantially constant and overlapped with the roof tile.

Front view of sheet feeding hopper according to the present invention Sectional view along the line II-II in FIG. Plan view of the feed conveyor section of FIG. (I) is a cross-sectional view showing the support state of the seat block by the push-up member, (II) is a cross-sectional view showing the push-up state of the seat block 4 (I) vertical side view

Explanation of symbols

B Sheet block S Sheet 1 Supply conveyor 10 Feed conveyor 11 Front guide member 12 Hopper portion 13 Rear guide member 15 Gate 22 Push-up member

Claims (1)

A feed conveyor is arranged in front of the unloading end of the supply conveyor for conveying the sheet block so that its conveying surface is located below the conveying surface of the supply conveyor, and the sheet block fed from the supply conveyor onto the feed conveyor is arranged. A front guide member that forms a gate that guides the front end face and allows several sheets to pass between the front conveyor and the conveyance surface of the feed conveyor, and the front guide member that is disposed so as to face the front guide member. And a rear guide member that forms a hopper portion that can accommodate the seat block, and the gate block is sequentially passed from the lower sheet to the roof tile by passing the gate block accommodated in the hopper portion by driving the feed conveyor. In the paper feed hopper that is fed out in the overlapping lap state,
A push-up member that is moved up and down below the hopper portion with the position below the conveying surface of the feed conveyor as a lower limit position and lifts the rear end portion of the sheet block accommodated in the hopper portion onto the conveying surface of the feed conveyor when ascending The sheet feeding hopper is characterized in that the lower sheet of the sheet block moved up and down by the raising and lowering movement of the push-up member is sent out from the gate to the downstream side by contact with the feed conveyor.

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