Movable Kickback-Inhibiting Members for Cutting Devices

Solution Overview

Problem

Existing kickback-inhibiting claws for cutting devices are not easily movable or removable, making it difficult to cut decorative plywood boards without damaging the workpiece, as they are not designed to avoid contact with the workpiece surface.

Innovation Solution

The introduction of a kickback-inhibiting device with a movable kickback-inhibiting member that can be pivoted between operative and inoperative positions using a holding device, allowing the operator to selectively engage or disengage the kickback-inhibiting member from the workpiece, and a mounting device that enables easy removal and reinstallation of the kickback-inhibiting members.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If kickback-inhibiting claws are provided to engage the workpiece and inhibit kickback, then kickback inhibition is improved, but the workpiece surface may be damaged

Engineering Contradiction:

Improvekickback inhibitionVSAvoidworkpiece surface damage

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The kickback-inhibiting member is designed to be movable between an operative position where it engages the workpiece to prevent kickback, and an inoperative position where it is retracted upwardly away from the workpiece. This dynamic positioning allows the system to adapt to different cutting requirements, enabling safe cutting of decorative plywood boards by preventing damage from the kickback-inhibiting member while maintaining kickback prevention capability when needed

Inventive Principle:

Principle #15Dynamics

2Device complexity

If kickback-inhibiting claws are made fixed and non-removable, then structural simplicity is improved, but adaptability to different workpiece types is worsened

Engineering Contradiction:

Improvestructural simplicityVSAvoidadaptability to different workpiece types

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The kickback-inhibiting member is designed to be movable between an operative position where it engages the workpiece to prevent kickback, and an inoperative position where it is retracted upwardly away from the workpiece. This dynamic positioning allows the system to adapt to different cutting requirements, enabling safe cutting of decorative plywood boards by preventing damage from the kickback-inhibiting member while maintaining kickback prevention capability when needed

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The cutting device is divided into separable components: the kickback-inhibiting member can be removed from the cutting device entirely. This segmentation allows the system to be configured differently based on the workpiece being cut - the kickback-inhibiting member can be removed when cutting decorative plywood boards to avoid surface damage, while being installed when kickback prevention is required for other workpieces

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS7631585B2Kickback-inhibiting devices for cutting devices

Publication Date: 2009.12.15 MAKITA CORP

AI summary

A kickback-inhibiting device serves to inhibit a workpiece from being lifted up by a rotating cutting blade of a cutting device. The kickback-inhibiting devices include kickback-inhibiting members and a holding device. Each of the kickback-inhibiting members is movable between an operative position and an inoperative position. In the operative position, each kickback-inhibiting member is operable to engage the workpiece from an upper side in order to inhibit the workpiece from being lifted up. In the inoperative position, each kickback-inhibiting member is positioned upwardly away from the workpiece so as not to interact with the workpiece. The holding device serves to hold the kickback-inhibiting members in the inoperative positions.