JP2556650Y2 - Fork for sheet stacking device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a fork used in a sheet stacking device for stacking sheets of corrugated cardboard, paper, etc. cut and traveled by a cutting machine on a stacking machine.

[0002]

2. Description of the Related Art A sheet stacking device that stacks sheets cut by a cutting machine and conveyed by a conveyor onto a stacking of a Rayboy device without interrupting sheet stacking when changing skids or changing orders. For this purpose, there is a method using a fork inserted into the stacking. The present applicant has already proposed this various sheet stacking device using an auxiliary fork and a main fork (Japanese Patent Application No. 3-130541). FIG. 1 shows a schematic configuration of the sheet stacking device according to the already proposed.

As shown in FIG. 1, this sheet stacking device includes a rayboy device 14 having a stacking 12 which can be moved up and down by a lift 10. Sheets 16 cut by a cutting machine (not shown) are sent to the rayboy device 14 by a conveyor 18 and stacked on the stacking 12. A feed roll 20 having a plurality of non-slip rolls fixed to a shaft at intervals and a holding roll 22 for feeding the sheet 16 conveyed by the conveyor 18 to the stacking 12 are provided between the stacking 12 and the conveyor 18. Is provided. Further, a pressing belt 23 is provided from above the conveyor 18, passing between the feed roll 20 and the pressing roll 22, and passing over the rayboy device 14.

An auxiliary fork 30 is provided between the feed roll 20 and the conveyor 18 so as to be driven horizontally reciprocally. The auxiliary fork passes between the non-slip rolls of the feed roll 20 and the stacking 12 of the rayboy device 14. It is configured to be able to protrude up to.

[0005] Further, a main fork 32 which is horizontally reciprocally driven and which can be moved up and down is provided below the conveyor 18. It is configured to be able to protrude to the stacking 12.

As described above, since the auxiliary fork 30 that is driven horizontally reciprocally is provided between the feed roll 20 and the conveyor 18, the distance between the feed roll 20 and the conveyor 18 becomes longer. Therefore, in order to prevent the seat 16 from sagging downward, an air blowing table 34 for blowing air upward is provided above the auxiliary fork 30.

[0007] The Layboy device 14 comprises a stacking 12
A stopper 36 for receiving the leading end of the sheet 16 fed into the stacker, a jogger 38 for aligning the rear end of the cut sheet fed to the stacking, and a side jogger 40 for aligning the side edge of the cut sheet are further provided.

FIG. 1 shows a state in which the auxiliary fork 30 is inserted into the stacking 12 and then the main fork 32 is inserted into the stacking.

In the sheet stacking apparatus having the above configuration, the sheet 16 conveyed by the conveyor 18
Are sent to the stacking 12 by the feed roll 20 and the holding roll 22, and are sequentially stacked.

When the number of sheets stacked on the stacking 12 reaches a predetermined number, the auxiliary fork 30 passes between the non-slip rolls 26 of the feed roll 20 as shown in FIG.
, And the sheets are sequentially stacked on the auxiliary fork 30. When the lift 10 is lowered, the sheets stacked on the stacking 12 start to be lowered, and at the same time, the main fork 32 is inserted through the space between the non-slip rolls 26 of the feed roll 20, and when the insertion is completed, the auxiliary fork 30 is pulled out. And sheet 16
Are stacked on the main fork 32.

The sheets stacked on the stacking 12 are rapidly lowered by the lift 10 and stopped. Then, the sheets stacked on the stacking 12 are carried out, a new stacking 12 is carried in, and when the carrying-in is completed, the stacking 12 is raised by the elevating lift 10 to the position of the main fork 32 and stopped. When the lift 10 stops, the main fork 32 is pulled out, and the sheets stacked on the main fork 32 are reloaded on the stacking 12.

[0012]

The above-described fork-using sheet stacking device has no problem when the sheet is thick, such as a broken ball, but when the sheet is thin, such as FIG. As shown in FIG.
Subsequently, when the main fork 32 is inserted,
Has a drawback that the sheet 16 is crushed when the main fork is inserted due to friction between the sheet 16 and the main fork 32.

An object of the present invention is to provide a structure of a fork, particularly a main fork, which can eliminate such disadvantages.

[0014]

SUMMARY OF THE INVENTION The present invention relates to a fork used in a sheet stacking device for stacking sheets cut and traveled by a cutting machine on a stacking machine.
Equipped with a plurality of arms, each arm is an elongated box, pulleys rotatably supported at both ends inside the box, respectively, and openings respectively opened at the top of the box above these pulleys, A belt stretched between the pulleys so as to pass through the upper surface of the box through these openings, and the belt is fixed to a pedestal frame of the sheet stacking device.

[0015]

FIG. 3 is a perspective view of a fork according to the present invention.
As an example, a fork 30 including three arms 10 is shown. FIG. 4 is an enlarged perspective view of one arm, and FIG.
5A is a cross-sectional view of the arm, and FIG. 5B is a top view of the arm.

Each of the arms 10 has an elongated box 12 having a rectangular cross section and a hollow inside. At both ends of the box, for example, a nylon pulley rotatably supported by the box. 14 and 16 are provided. Openings 18 and 20 are formed in the upper box of these pulleys. For example, a nylon belt 22 is stretched between the pulleys 14 and 16, and an upper portion of the belt 22 has an opening 1.
It moves out of the box body 12 and moves on the upper surface of the box body 12, and the lower part of the belt moves inside the box body 12. The belt 22 is fixed to a pedestal frame 24 of a sheet stacking device (not shown).

Now, the fork 30 having the above-described configuration will be described.
When the belt 22 is inserted into the stacking and pulled out of the stacking, the belt 22 goes around between the pulleys 14 and 16 because the belt 22 is fixed to the base frame 24. Therefore, when inserting the main fork under the sheet temporarily received by the auxiliary fork, the sheet rides on the belt and there is no relative movement between the sheet and the belt, so there is no friction between the sheet and the belt Therefore, there is no possibility that the sheet will be crushed when the sheet is inserted into the stacking unlike the conventional fork.

Although the embodiment of the present invention has been described above, the material of the pulley and the belt is not limited to nylon, but may be other materials.

[0019]

As described above, when the fork of the present invention is used, the sheet is not crushed when the fork is inserted into the stacking, so that the sheets can be stably stacked.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration of a sheet stacking device.

FIG. 2 is a view for explaining a drawback of a conventional fork.

FIG. 3 is a perspective view of a fork according to an embodiment of the present invention;

FIG. 4 is a perspective view of an arm constituting the fork.

5A is a sectional view of an arm, and FIG. 5B is a top view of the arm.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Arm 12 Box body 14,16 Pulley 18,20 Opening 22 Belt 24 Pedestal frame 30 Fork

Claims (1)

(57) [Scope of request for utility model registration] 1. A fork for use in a sheet stacking device for stacking sheets cut and traveled by a cutting machine on a stack, comprising: a plurality of arms, each of which has an elongated box and an interior of the box. Pulleys rotatably supported on both ends of the pulley, openings respectively opened in the upper part of the box above these pulleys, and stretched between the pulleys so as to pass through the upper surface of the box through these openings. A fork for the sheet stacking device, the belt being fixed to a pedestal frame of the sheet stacking device.