JPH0229377B2

JPH0229377B2 - SHURETSUDAA

Info

Publication number: JPH0229377B2
Application number: JP2412283A
Authority: JP
Inventors: Yoshimitsu Oota
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 1983-02-15
Filing date: 1983-02-15
Publication date: 1990-06-29
Anticipated expiration: 2003-02-15
Also published as: JPS59147653A

Description

【発明の詳細な説明】産業上の利用分野本発明は被細断物の投入口部に被細断物検知装
置を備えて被細断物を投入した際に自動的にカツ
ター部が始動するようにしたシユレツダーに関す
る。[Detailed Description of the Invention] Industrial Application Field The present invention provides a shredded object detection device in the inlet for shredding objects so that the cutter automatically starts when the shredded objects are input. Regarding the shredder.

従来例の構成とその問題点第１図は従来のこの種のシユレツダーにおける
内部構造を示すもので、１は本体、２は被細断物
の投入口、３はカツターであり、減速機４を介し
てモータ５により駆動される。６は発光素子であ
り、７はこの発光素子６と相対した投入口面に位
置した受光素子である。この形式のシユレツダー
においては、発光素子６から出た光ａを受光素子
７が受光するようにしてあり、被細断物が光ａを
遮断した時にこれを受光素子７が検知して、モー
タ５に通電し、カツター３を駆動することで被細
断物を遮断するようになつている。しかし、この
方式では被細断物の量が少なかつたり、厚さが薄
かつたりした場合、外光ｂが受光素子７に達した
ままで、受光素子７が動作しないことが応々にし
たあつた。Structure of the conventional example and its problems Figure 1 shows the internal structure of a conventional shredder of this type. 1 is the main body, 2 is the inlet for the material to be shredded, 3 is the cutter, and the reducer 4 is connected to the shredder. It is driven by a motor 5 via the motor 5. 6 is a light-emitting element, and 7 is a light-receiving element located on the inlet face facing the light-emitting element 6. In this type of shredder, the light receiving element 7 receives the light a emitted from the light emitting element 6, and when the object to be shredded blocks the light a, the light receiving element 7 detects this, and the motor 5 By applying electricity to the cutter 3 and driving the cutter 3, the object to be shredded is cut off. However, with this method, if the amount of the object to be shredded is small or the thickness is thin, the external light b may still reach the light receiving element 7 and the light receiving element 7 may not operate. It was hot.

発明の目的本発明はこのような従来の問題を解消し、外光
の影響を受けない自動始動形のシユレツダーを提
供せんとするものである。OBJECTS OF THE INVENTION The present invention aims to solve these conventional problems and provide an automatically starting type shredder that is not affected by external light.

発明の構成本発明のシユレツダーは、被細断物の検知を行
なう受光素子を収めた筒の表面を透明なカバーで
覆い、かつ、外光が透明カバーで全反射するよう
にして、受光素子の誤動作を無くしたものであ
る。Structure of the Invention The shredder of the present invention covers the surface of a cylinder containing a light receiving element that detects objects to be shredded with a transparent cover, and completely reflects outside light on the transparent cover. This eliminates malfunctions.

実施例の説明以下、添加図面に基づいて本発明の一実施例に
ついて説明する。第２図〜第４図において、１１
はシユレツダー本体、１２は細断物の投入口であ
り、内部にはカツター１３およびこのカツター１
３を減速機１４を介して駆動するモータ１５など
を内蔵し、投入口１２に対して細断された屑の排
出口１６を有している。また、投入口１２の一方
１７にはランプ等の発光素子１８を、他方１９に
は筒２０に収められた受光素子２１が取付けてあ
る。筒２０の表面は投入口の面１９と一致してお
り、かつ透明なカバー２２で覆われている。そし
て、このカバー２２の上端と、発光素子１８側の
投入口１７の上端を結ぶ線ｃがカバー２２の表面
に垂直な線ｄとなす角θは、このカバー２２の材
料と空気の場合の光の全反射の臨界角よりも大き
くしてある。即ち、例えばカバー２２を透明なガ
ラスとした場合、θ＞41゜10′（ガラスと空気の場
合の光の全反射の臨界角）としてある。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below based on additional drawings. In Figures 2 to 4, 11
12 is the shredder main body, 12 is the inlet for shredded material, and inside there is a cutter 13 and this cutter 1.
3 via a speed reducer 14, etc., and has an inlet 12 and an outlet 16 for discharging shredded waste. Further, a light emitting element 18 such as a lamp is attached to one side 17 of the input port 12, and a light receiving element 21 housed in a tube 20 is attached to the other side 19. The surface of the cylinder 20 coincides with the surface 19 of the inlet, and is covered with a transparent cover 22. The angle θ between the line c connecting the upper end of the cover 22 and the upper end of the inlet 17 on the light emitting element 18 side and the line d perpendicular to the surface of the cover 22 is the angle θ between the material of the cover 22 and the light emitted when air is used. is set larger than the critical angle of total internal reflection. That is, for example, when the cover 22 is made of transparent glass, θ>41°10' (the critical angle for total reflection of light between glass and air).

２３は被細断物、２４はモータ駆動回路、２５
はスイツチである。 23 is an object to be shredded, 24 is a motor drive circuit, 25
is a switch.

上記構成において明らかなように、受光素子２
１を収めた筒２０の表面は透明なカバー２２で覆
われているが、外光ｅの入射角をカバー２２の全
反射の臨界角より大きくしてあるため、外光ｅは
カバー２２の表面で全反射し、従つて、受光素子
２１に達することは無い。 As is clear in the above configuration, the light receiving element 2
The surface of the tube 20 containing the 1 is covered with a transparent cover 22, but since the incident angle of the external light e is made larger than the critical angle of total internal reflection of the cover 22, the external light e does not reach the surface of the cover 22. Therefore, the light does not reach the light receiving element 21.

発明の効果今、発光素子の光量を100とし、受光素子が光
量50で動作するものとする。薄い紙を投入され受
光素子に達する光量が40となつても、外光からこ
の薄い紙を通つてくる光量が20あれば従来例では
受光素子が検知せず、いわゆる誤動作となるが、
本発明では外光をカバーで全反射するため、正常
に動作する。Effects of the Invention Let us now assume that the light intensity of the light emitting element is 100, and that the light receiving element operates with a light intensity of 50. Even if a thin piece of paper is inserted and the amount of light that reaches the light receiving element is 40, if the amount of light that passes through this thin paper from outside light is 20, in the conventional example, the light receiving element will not detect it, resulting in what is called a malfunction.
The present invention operates normally because external light is totally reflected by the cover.

即ち、本発明によれば、外光の影響を受けない
確実な動作の自動始動形のシユレツダーが得られ
る。 That is, according to the present invention, it is possible to obtain an automatically starting type shredder that operates reliably and is not affected by external light.

[Brief explanation of drawings]

第１図は従来例のシユレツダーの断面図、第２
図は本発明の実施例を示すシユレツダーの断面
図、第３図は同外観斜視図、第４図は回路図であ
る。１１……本体、１２……投入口、１３……カツ
ター、１５……モータ、１８……発光素子、２０
……筒、２１……受光素子、２２……透明なカバ
ー、２４……モータ駆動回路。 Figure 1 is a sectional view of a conventional shredder;
The figure is a sectional view of a shredder showing an embodiment of the present invention, FIG. 3 is an external perspective view of the same, and FIG. 4 is a circuit diagram. 11... Main body, 12... Inlet, 13... Cutter, 15... Motor, 18... Light emitting element, 20
... cylinder, 21 ... light receiving element, 22 ... transparent cover, 24 ... motor drive circuit.

Claims

[Claims]

1. Form an inlet for the paper to be cut on the top surface of the main body, which has a built-in drive unit such as a cutter and motor, and place a light-emitting element in one of the inlets and a light-receiving element in correspondence with the light-emitting element in the other. The tube is provided with a motor drive circuit that energizes the motor when the light-receiving element detects a change in light from the light-emitting element, and the surface of the tube containing the light-receiving element is aligned with the input opening, and the tube is provided with a transparent cover. The angle between the line connecting the top edge of this cover and the top edge of the inlet on the light emitting element side and the line perpendicular to the cover surface is greater than the critical angle for total reflection of light between the material of the cover and air. A shredder made to grow.