JPS6226976B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a wire cutting device for cutting wires binding compressed waste paper.

After waste paper such as newspapers and magazines is collected, it is compressed into a rectangular parallelepiped of approximately 1 x 1 x 2 m by a waste paper company, formed into compressed waste paper 10 as shown in FIG. 1, and tied with wire 12. This compressed waste paper is transported, crushed in a crusher at a paper mill, melted, and recycled. When using the crusher, it is necessary to remove the wire from the compressed waste paper.

A removal device 14 shown in FIG. 2 can be considered as a device for performing this work (see Japanese Patent Application No. 58-211997). This device 14 detects and stops the compressed waste paper 10 transported by a conveyor 16 with an optical sensor 18, and cuts the wire 12 with a cutting device 20 at approximately the center of one side of the compressed waste paper 10 (see Fig. 3A). , B), then hold the wire 12 with the clamping device 24 near the corner 22 at both ends of this side surface and release it from the corner 22 (see C of the same figure), then hold the wire 12 from the opposite side with the hook 2.
6 (see D in the same figure).

The present invention primarily relates to a cutting device 20 for use in the removal device 14 described above.

The present invention is applicable to cutting not only compressed waste paper but also binding wires, strings, etc. of pulp, cotton, etc.

Conventional technology In the past, the work of removing wires from compressed waste paper was all done manually, and the wires were cut one by one by a worker using a cutter, and there was no automatic equipment at all. .

Problems to be solved by the invention This lack of automation is wire 1.
2 is not necessarily in a fixed position, so the wire cutting device is equipped with compressed waste paper 1 regardless of its position.
This is because the ability to cut the wire stretched along the surface of the wire is required, but it is difficult to meet such a requirement.

The wire cutting device of the present invention has been completed to meet this requirement.

Means for Solving the Problems In other words, the present invention provides a toothed plate having pointed teeth arranged in a row, the teeth in close contact with this toothed plate, and a reciprocating motion in the longitudinal direction of this toothed plate. Compressed waste paper characterized by having a pressing mechanism that presses the teeth of both of these tooth row plates so that the tips of the teeth slightly enter the compressed waste paper, and cuts the wire that binds the compressed waste paper. This is a wire cutting device.

Therefore, in this cutting device, when the tooth tip of the tooth plate enters the compressed waste paper, the wire stretched on the surface of the compressed waste paper will be located between the teeth regardless of its position, and the wire will be located between the teeth regardless of its position. Due to the reciprocating motion of the row plate, the teeth on both tooth row plates cut like scissors.

EXAMPLES The present invention will be described below with reference to illustrative examples.
In this cutting device 20, columns 28, 28 are fixed to the side of the conveyor 16.
Support rods 30, 30 extending forward are protruded from the lower portions of the columns 28, 28, into which the lower portion of the toothed plate 32 is slidably fitted. Further, this toothed plate 32 is connected to drive units 38, 40 such as air cylinders attached to the columns 28, 28 at two upper and lower support points 34, 36, and is driven by the operation of these drive units 38, 40. The whole thing can move back and forth and tilt. The toothed plate 32 has a substantially box-shaped cross section, and teeth 42 with sharp tips are provided in a row in the vertical direction at the front end. Another toothed plate 44 is provided within the toothed plate 32, and teeth 46 similar to those of the toothed plate 32 are formed at the front end of this toothed plate 44, and both teeth 4
2 and 46 are arranged so as to be in close contact with each other. Further, a rectangular hole 48 is provided at the upper end of the toothed plate 42, and a motor 50 attached to the toothed plate 32 is provided in the rectangular hole 48.
An eccentric circular cam 52 driven by the motor 50 is inserted into the toothed plate 44 and the toothed plate 3
2, the teeth 42 and 46 are slid together. Near the support points 34 and 36 of the tooth row plate 32, there are limit switches 54 and 5 that protrude forward, respectively.
6 is provided, and the upper limit switch 54 is connected to the upper driving section 38 and the lower limit switch 56.
is combined with the lower driving part 40, and the toothed plates 32, 4
4, the tips of teeth 42 and 46 are slightly compressed waste paper 1
It is detected that the compressed waste paper 10 has approached the compressed waste paper 10 to the extent that it approaches 0, and the operation of the drive units 38 and 40 is stopped.

This cutting device 20 has the above configuration, and is operated by a control device (not shown) as follows. First, the motor 50 is activated and the toothed plates 32, 44 begin to move up and down, and at the same time, the drive units 38, 40 are activated and the toothed plates 32, 44 begin to move forward. Next, the drive units 38 and 40 are stopped by the limit switches 54 and 56. At this time, the teeth 42 of the tooth row plates 32, 44,
46, even if the cross section of the compressed waste paper 10 is deformed into a diamond shape, it will surely be parallel to the side surface of the compressed waste paper 10, and the teeth 4
Since wires 2 and 46 have entered the compressed waste paper 10, all wires 12 are cut regardless of their positions.
Next, the drives 38, 40 are activated again, and the toothed plates 32, 40 are activated again.
44 returns to its original position and stops the motor 50 to complete the cutting operation.

Note that in this device 20, the drive units 38, 4
0 and limit switches 54, 56, the teeth 42, 46 of the tooth row plates 32, 44 are inclined in accordance with the side surface of the compressed waste paper 10, and a pressing mechanism is used to make the teeth parallel to the side surface, but this inclination mechanism is omitted. However, it is also possible to use a simple pressing mechanism that only presses both toothed plates while holding them at a constant angle. In this cutting device, the teeth can enter the surface of the compressed waste paper, etc. while cutting the compressed waste paper, etc., so the above-mentioned simple pressing mechanism can be used if the compressed waste paper, etc. has a slight inclination.

Effects of the Invention As is clear from the above, the cutting device of the present invention cuts the wire by inserting the sharp tooth tips of the toothed plate into compressed waste paper etc. and rubbing them together, regardless of the position of the wire. Can be cut reliably.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of compressed waste paper, FIG. 2 is a plan view of a wire removing device using the present invention, and FIG. 3 is an explanatory view showing the operation of this device. Figures 4 to 6 show an embodiment of the present invention, with Figure 4 being a front view and Figure 5 being a front view.
The figure is a left side view, and FIG. 6 is a sectional view taken along the line AA. 10... Compressed waste paper, 12... Wire, 20... Cutting device, 32, 44... Teeth plate, 34, 36... Support point,
38, 40... Drive unit, 42, 46... Teeth, 54, 5
6...Limit switch.

Claims (1)

[Claims] 1. A toothed plate having pointed teeth arranged in a row, and another toothed plate whose teeth are in close contact with this toothed plate and reciprocate in the longitudinal direction of this toothed plate. and a pressing mechanism that presses the teeth of both tooth row plates so that the tips of the teeth slightly enter the compressed waste paper to cut the wire that binds the compressed waste paper. 2. A drive unit that supports near both ends in the longitudinal direction of both tooth row plates and moves the tips of the teeth toward the compressed waste paper, and a drive unit that is provided near each of the support points and detects the compressed waste paper and moves the support point. 2. The wire cutting device for compressed waste paper according to claim 1, which uses a pressing mechanism having a limit switch that stops the driving part and makes the tooth tips of the tooth row plate parallel to the surface of the compressed waste paper.