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Device for protecting against accidental contact and method for protecting against accidental contact of a displaceable part

A technology for contact protection and moving parts, which is applied in the attachment devices of sawing machines, auxiliary sawing devices, engineering safety devices, etc., can solve the problems of insufficient protection and impracticality, and achieves improved safety, improved recognition accuracy, simplified Effects of Official Licensing Procedures

Inactive Publication Date: 2006-01-04
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

They are therefore either impractical in terms of operation or do not provide adequate protection

Method used

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  • Device for protecting against accidental contact and method for protecting against accidental contact of a displaceable part
  • Device for protecting against accidental contact and method for protecting against accidental contact of a displaceable part
  • Device for protecting against accidental contact and method for protecting against accidental contact of a displaceable part

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Embodiment Construction

[0035] FIG. 1 shows a detail of a stationary circular saw with the device according to the invention for contact protection. A workpiece 2 , for example a piece of wood, is pushed parallel to the saw blade 1 on the table in the direction of movement 7 . In this case, the workpieces 2 are sawn apart from one another by means of the saw blade 1 at a cutting edge 31 . For guiding and pressing of the workpiece 2, a person holds the workpiece with his fingers directly in the vicinity of the saw blade 1. A finger is shown schematically for this purpose in FIG. 1 and is marked with the reference numeral 3 . In order to prevent the person's fingers from coming into contact with the saw blade 1 , a sensor 5 of the device according to the invention for contact protection is provided, which is arranged directly in the vicinity of the saw blade 1 . In the exemplary embodiment shown in FIG. 1 , the sensor 5 is located on the underside 4 . 1 of a pinch guard 4 surrounding the saw blade 1 ...

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Abstract

The invention relates to a device for protecting against accidental contact. The inventive device comprises a sensor (5) for producing and detecting an electromagnetic field, which is arranged in close proximity to a non-contactable displaceable part (1). The inventive device also comprises an evaluation unit (8) which is connected to the sensor (5) in order to evaluate the sensor signal produced by the sensor (5). An evaluation signal can be produced by the evaluation unit (8). Said device further comprises a control unit (9) which is connected to the evaluation unit (8) and which is embodied and operated in such a manner that the movement of the part (1) can be controlled according to the evaluation signal.

Description

technical field [0001] The invention relates to a device for contact protection and a method of protection against contact with moving parts. The method and the device can be used to protect a human body part from contact with a saw blade of a table circular saw. [0002] Injuries on circular saws are the most frequent work accidents. A distinction is made between sawing off or sawing a finger through pushing into the wood and a finger, palm or arm injury caused by the fast kickback or tipping of the block. Background technique [0003] A table circular saw with a safety system is known from the prior art US 2002 / 0017184 A1. The table circular saw has an adjustable saw blade, a sensing system for sensing contact between a person and the saw blade, and a sensor system for turning the saw when the sensing system determines contact between a person and the saw blade. The brake mechanism of the plate stop. The system for sensing the contact between a person and the saw blade...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16P3/14B27G19/00B23D59/00B27B5/38
CPCB23D59/005B27G19/00B27B5/38F16P3/14F16P3/147Y10T83/6638Y10T83/088Y10T83/081Y10T83/152Y10T83/773Y10T83/175Y10T83/704
Inventor 克劳泽·福格特伦德
Owner ROBERT BOSCH GMBH
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