JPS6313738B2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a document shredding machine.

Conventionally, a document shredding machine has been designed to automatically start and stop the shredding roller by sensing the insertion of shredded material using an operating piece of a microswitch, as shown in FIG.
The actuating piece 6 is inserted into the meshing space 5 between the rotary teeth 3 and 4 of the rotary blade 4, and is operated while the shredded material 7 pushes the actuating piece 6 toward the outer peripheral surface of the rotary blade 4.

However, since the actuating piece 6 does not have a place to escape within the meshing space 5, if the shredded material 7 filling the space between the rotary blades 3, 4 and the entrainment prevention plate 8 is thrown, the actuating piece 6 The shredding resistance increases only at the inserted part, and the shredded material 7 may not be fed properly, the actuating piece 6 may be deformed, or the actuating piece 6 may
The rotary blade 4 is rubbed against the outer circumferential surface of the rotary blade 4, resulting in severe wear, fraying, and eventually breakage.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a document shredding machine that can smoothly feed shredded materials and prevent deformation and damage of the operating piece.

An embodiment of the present invention will be described with reference to FIGS. 2 to 5. In FIG. 2, numeral 9 is a waste box, and 10 is a main body of the document shredding machine which is detachably installed in the upper opening of the waste box. Inside the main body 10, as shown in FIGS. 3 and 4, rotary blades 11 and 12 are provided.
A pair of shredding rollers 13 and 14 that are alternately engaged with each other.
and one shredding roller 14 is connected to a reducer (not shown).
An electric motor 15 is disposed to be driven through the shredding roller 14, and a micro switch 16 is built in above the shredding roller 14. As shown in FIG. 5, the operating piece 17 of the micro switch 16 inserts its extension 17a into the meshing space 18 between the rotary teeth 11 and 12 of the shredding rollers 13 and 14, and shreds the micro switch 16. The rotary blade 12 is formed to sense an object 19, and there is an extension 1 on the outer peripheral surface of the rotary blade 12 corresponding to the groove into which the extension 17a is inserted.
A ring-shaped clearance groove 20 for passage of the shredded material 7a is provided. Reference numerals 21 and 22 indicate entanglement prevention plates that prevent the shredded material 19 from being entangled between the rotary blades 11 and 12. Reference numeral 23 denotes an input port formed in the upper part of the main body 10. 13a and 14a are roller shafts of both rollers 13 and 14.

In the above configuration, when the shredded material 19 is introduced through the input port 23 formed at the top of the main body 10, the shredded material 19 pushes the extension 17a of the actuating piece 17 of the micro switch 16, turning on the circuit. The electric motor 15 rotates, the shredding rollers 14 and 13 rotate, and the shredded material 19 is sent while being shredded. Shredded items 19
While the operator is pushing the extension 17a of the operating piece 17, the circuit is on, and when the shredded material 19 leaves the extension 17a, the circuit is turned off and automatically stopped.

In this way, this extending portion 17a senses the shredded material 19, but in this embodiment, if the amount of shredded material 19 introduced increases and each rotary blade 11, 1
2 and the entrainment prevention plate 21 is filled with shredded material 19, the extended portion 17a
Since the shredded material 19 enters the relief groove 20 provided in the rotary blade 12, the shredded material 19 is smoothly fed in the same way as in the part of the operating piece 17 where the extension part 17a is not inserted. Further, the extending portion 17a of the actuating piece 17 does not break due to deformation or wear, and a highly durable document shredding machine can be realized.

As described above, the document shredding machine of the present invention has a plurality of rotary blades formed in parallel on each roller shaft. A second shredding roller, a drive mechanism that rotationally drives these shredding rollers, and an actuating piece are inserted into a meshing space between the rotating teeth of both rollers, and the actuating piece crosses the movement path of the shredded material. A micro switch is located on the roller shaft side of one roller in the cut state and turns off the drive mechanism, and is pressed against the outer peripheral surface of the rotary blade of the other roller by the inserted shredded material and turns on the drive mechanism. and an operating piece relief groove formed in a ring shape on the outer circumferential surface of the rotary blade to which the operating piece corresponds, so that it is possible to smoothly feed the shredded material and prevent deformation and damage of the operating piece. There is.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional example, Fig. 2 is a perspective view of an embodiment of the present invention, Fig. 3 is a sectional view thereof, Fig. 4 is an enlarged sectional view thereof, and Fig. 5 is an enlarged horizontal view of the roller section. FIG. 11, 12... Rotating blade, 13, 14... Shredding roller, 13a, 14a... Roller shaft, 15... Electric motor (drive mechanism), 16... Micro switch,
17... Actuation piece, 18... One meshing space, 19...
Shredded material, 20...operating piece relief groove.

Claims (1)

[Claims] 1. First and second shredding rollers each having a large number of rotary blades formed in parallel on a roller shaft, the roller shafts being arranged in parallel and the rotary blades meshing with each other alternately, and these shredding rollers. a drive mechanism that rotationally drives the roller, and an actuating piece inserted into a meshing space between the rotating teeth of both rollers, and the actuating piece is positioned on the roller shaft side of one of the rollers while crossing the moving path of the shredded material. a micro switch that turns off the drive mechanism and turns on the drive mechanism by being pressed toward the outer circumferential surface of the rotary blade of the other roller by the inserted shredded material; A document shredding machine equipped with a ring-shaped operating side relief groove.