JPH01203054A - Shredder - Google Patents

Abstract

PURPOSE:To make assembly of the title shredder easy and remove chips without fail with a small number of parts by inserting each circular cutter and spacer into a cutter shaft alternately and permitting the spacers to remove chips. CONSTITUTION:Cutter shafts 7a, 7b are formed in such a manner that they have a segmental cross-section, and circular cutters 11a, 11b are notched on the periphery for feeding documents. At the same time, the shape of central holes for shaft insertion 12a, 12b is the same as that of the cutter shafts 7a, 7b. The former is caused to rotate cooperatively with the cutter shafts 7a, 7b. Then polyacetate resin spacers 13a, 13b which slip smoothly and exist between the circular cutters 11a, 11b have shaft holes 14a, 14b in which the cutter shafts 7a, 7b are inserted in freely movable fashion. Further, chip removing guide pieces 15a, 15b are formed obliquely downward on an edge opposed to the spacers 13a, 13b on both sides. As a result, the assembly is made easily without increasing accuracy.

Description

[Detailed Description of the Invention] [Industrial Use] The present invention relates to a shredder used for shredding confidential documents that are no longer needed and disposing of them, and particularly relates to a shredder with an improved cutter part. - related to

[Prior Art] When a donut-shaped circular cutter is installed on a shaft, the T-shaped cutter installed in a conventional shredder is fixed to the shaft together with a spacer, so that it is overlapped with the spacer and inserted into the spacer so that it can rotate. A chip removal plate was installed.

[Problems to be Solved by the Invention] An object of the present invention is to provide a shredder which is simple in structure, inexpensive, and capable of smoothly shredding paper by modifying the conventional structure.

[Means for Solving the Problems] The means of the present invention consists of inserting a circular cutter and a spacer alternately onto a chip case housed in a main body, mounting a pair of cutter shafts, is located directly below the paper insertion slot on the top surface of the main body, the cutter shaft is formed into an occluded circular cross section, and the center hole of each circular cutter positioned so as to mesh with each other is formed into the same shape as the cutter shaft. The spacer interposed between the circular cutters has a circular hole inserted through the cutter shaft, and is loosely inserted into the cutter shaft, and chip removal plates are formed on opposite edges of the spacer on both sides.

Embodiment 1 in the figure shows a main body, in which a space 3 for storing a chip case 2 and a space 6 for mounting a motor 5 are provided via a division plate 4.

Two cutter shafts 7a and 7b are mounted above the space 3, and the middle of the two cutter shafts is located directly below the insertion opening 8 formed at the upper end of the main body 1. Reference numeral 9 indicates a transmission gear mechanism between the motor 5 and one of the cutter shafts 7a, and 10a and 10b indicate interlocking gears of the cutter shafts 7a and 7b.

In the present invention, the cutter shafts 7a and 7b are formed into an occluded circular cross section, and the circular cutters 11a and 11 are inserted through the cutter shafts 7a and 7b.
lb has a notch on the circumference for feeding documents,
The central shaft insertion holes 12a and 12b are shaped to have the same shape as the cutter shaft, and rotate together with the cutter shaft. Spacers 13a and 13b made of a polyacetylene resin with good sliding and interposed between the circular cutters 11a and llb are loosely inserted into the cutter shafts 7a and 7b and have shaft holes 14a and 14b. Chip removal guide pieces 15a, 15b are formed diagonally downward on the opposing edges, and engagement notches 18a, 18b are provided in the locking pieces 17a, 17b with the tips of the frames 16a, 16b standing up to prevent the entry of chips. It has a prevention structure. 19 is spacer 1
3a and 13b show position fixing holes through which the shaft 20 is passed.

[Function] Both cutter shafts rotate with the circular cutters meshing with each other, the spacer remains stationary, and the chips shredded by the cutters can be reliably dropped into the case by the chip removal plate.

[FIJ result] According to the present invention, the spacer also serves to remove chips, so
The number of parts is small, and cut chips will not get caught inside. In addition, when assembling a circular cutter, the conventional configuration in which it is fixed integrally with the spacer requires the addition of a chip removal plate, and variations in the thickness of the circular cutter and spacer result in a large overall error when a large number of circular cutters and spacers are stacked. It was necessary to increase precision and make adjustments, but in the present invention, it is only necessary to insert and insert circular cutters and spacers alternately, and the assembly work is easy and there is no need to increase precision.

[Brief explanation of the drawing]

The drawings show an embodiment of the shredder according to the present invention, in which FIG. 1 is a vertical front view, FIG. 2 is a vertical side view, and FIG.
The figure is a plan view of the main part, and FIG. 4 is a longitudinal side view. 1...Body 2...Chip case 5...Motor
7a, 7b...Cutter shaft 8...Insertion port 11a. 11b...Circular cutter 12a, 12b...Shaft insertion hole 13a, 13b spacer 14a. 14b ・Circular shaft hole 15a, 15b ・Exclusion guide 4th
Figure procedure amendment (method) % formula % 1 Display of the case Japanese Patent Application No. 63-26991 2, Name of the invention Shredder 3. Person making the amendment Relationship with the case Patent applicant Nippo Co., Ltd. 5. Date of amendment order May 11, 1986 (Shipping mortar)
(May 31, 1988) As shown in the attached sheet (Engraving, no changes to the contents) June 1988
Month 3rd

Claims (1)

[Claims] A shredder consisting of a combination of the following four elements. (B) Alternately insert the circular cutter and spacer onto the chip case stored in the main body, and attach a pair of cutter shafts, and position the middle part of both cutter shafts directly below the paper insertion slot on the top surface of the main body. Was it. (b) The cutter shaft is formed to have an occluded circular cross section, and the center holes of the circular cutters positioned so as to mesh with each other are formed to have the same shape as the cutter shaft. (c) The spacer interposed between each circular cutter is loosely inserted into the cutter shaft by forming a circular hole that is inserted into the cutter shaft. (d) Chip removal plates are formed on the opposing edges of the spacer on both sides.