JPH0331412Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is equipped with a shredded object detection device at the inlet of the shredded material so that the cutter automatically starts when the shredded material is input. This is related to the shredder.

Prior Art Conventionally, this type of shredder has been constructed as shown in FIG. In FIG. 5, 1 is a shredder main body, 2 is an input port formed from the upper end of the main body 1 for inputting materials to be shredded, and 3 is a pair of cutters. and is driven by a motor 5. 6 is a light receiving element, and 7 is a light receiving element located opposite to this light receiving element 6 so as to sandwich the input port 2 between the light receiving element 6 and the light emitting element 6. Reference numerals 8 and 9 are transparent covers that cover the light emitting element 6 and the light receiving element 7.
A part of the inner surface is formed flush. In this type of shredder, a light receiving element 7 receives light a emitted from a light emitting element 6.
When the object to be shredded blocks the light a, the light receiving element 7 detects this, the motor 5 is energized, drives the cutter 3 to shred the object, and when the shredding is finished, the light a is emitted. The light entered the light receiving element 7 and stopped. However, even if the light a is not completely blocked, it is detected when the amount of the light a decreases to some extent so that it can be detected even when the object to be shredded is nearly transparent or the number of pieces is small.

Problems that the invention aims to solve However, if the detection sensitivity is increased too much, the transparent covers 8 and 9 that cover the light-emitting element 6 and the light-receiving element 7 will be exposed to dust in the air, ink, carbon, etc. of the material to be shredded. If it gets attached. The amount of light a will be reduced, and the state will be the same as when the material to be shredded was put in.
I had a problem where the cutter kept driving.

This invention solves these problems,
The object of the present invention is to provide a shredder that can automatically clean dust and dirt on the cover surface by inserting objects to be shredded, and is less likely to malfunction.

Means for Solving the Problem In order to solve this problem, the present invention forms an inlet for the material to be shredded from the upper end of the shredder main body, which is equipped with a cutter and a drive unit such as a motor that drives the cutter. A light emitting element is provided on one side of this inlet, and a light receiving element is provided on the other side facing the light emitting element, and when the light receiving element senses a decrease in the amount of light from the light emitting element, the motor is activated. The light-emitting element and the light-receiving element are each covered with a transparent cover, and the surface of each cover is made to protrude from the inner surface of the input opening.

Effect With this configuration, even if dust, ink, carbon, etc. adhere to the surface of the transparent cover, the material to be shredded from the input port will rub against the surface of the cover. It can be cleaned by cutting it off.

Embodiment The drawings (first
This will be explained based on FIGS.

In the figure, 11 is a shredder main body, and a dust box 12 is provided below it.
Reference numeral 13 denotes an inlet for shredding objects formed from the upper end of the shredder main body 11, and 14 denotes this inlet 13.
A pair of cutters are provided on the shredder main body 11 so as to shred the object A passing through the shredder body 11. The cutters 14 are driven by a motor 16 via a speed reducer 15. The reducer 15 and motor 16 are built into the shredder main body 11. Reference numeral 17 denotes a discharge port located at the lower part of the input port 13 and formed to open into the dust box 12, through which the scraps that have been input into the input port 13 and shredded by the cutter 14 are discharged into the dust box 12. It's becoming like that. A transparent cover 19 containing a light emitting element 18 such as a lamp is provided on one side of the input port 13, and a transparent cover 21 containing a light receiving element 20 is provided on the other side. The transparent covers 19 and 21 have surfaces facing the inlet 13.
It protrudes from the inner surfaces 22 and 23 by the dimension W toward the input port 13 side. 24 is a switch, and 25 is a motor drive circuit. Note that the light emitting element 18 and the light receiving element 20 are opposed to each other.

In the above configuration, when the material to be shredded A is put into the input port 13, the amount of light b emitted from the light receiving element 18 decreases and enters the light receiving element 20, detecting this change, the motor 16 rotates and cuts. 14 is driven. When the shredding is completed, the amount of light b entering the light receiving element 20 returns to the original level, and the motor 1
6 stops rotating.

By the way, if dust in the air or dirt from objects to be shredded adheres to the covers 19 and 21, the amount of light b decreases, causing malfunction of the motor 16. In order to solve this problem, in the present invention, the covers 19 and 21 are made to protrude by an amount W from the inner surface of the input port 13, so that when the material to be shredded is put in, the material to be shredded will always come into contact with this protrusion, and the cover The objects to be shredded will wipe away the dust and dirt on the surfaces of 19 and 21. In other words, shredding automatically cleans the material.

Effects of the invention As described above, according to the invention, by making the cover of the light-emitting element and the light-receiving element protrude from the inner surface of the inlet, malfunctions due to dirt on the cover surface can be reduced, and the autoshredder is easy to use. can be obtained.

[Brief explanation of drawings]

Figures 1 to 4 show an embodiment of the present invention, with Figure 1 being an enlarged sectional view of the main parts, Figure 2 being an overall sectional view, Figure 3 being a plan view of the shredder body, and Figure 4 being a circuit diagram. FIG. 5 is an overall sectional view showing a conventional example. 11... Shredder body, 12... Dust box, 13... Inlet, 14... Cutter, 1
5...Reducer, 16...Motor, 17...Exhaust port, 18...Light emitting element, 19...Cover, 20...
...Light receiving element, 21...Cover, 22, 23...Inner surface, 24...Switch, 25...Motor drive circuit.

Claims (1)

[Scope of utility model registration request] The shredder main body is equipped with a cutter and a drive unit such as a motor that drives the cutter, and an inlet for the material to be shredded is formed from the upper end.A light emitting element is placed on one side of this inlet, and a light emitting element is placed on the other side. A light-receiving element is provided to face the light-emitting element, a motor drive circuit is provided to energize the motor when the light-receiving element senses a decrease in the amount of light from the light-emitting element, and a transparent cover is provided for each of the light-emitting element and the light-receiving element. A shredder in which the surface of each cover protrudes from the inner surface of the input slot.