JP2005144611A

JP2005144611A - Bumper for power tool and power tool

Info

Publication number: JP2005144611A
Application number: JP2003387138A
Authority: JP
Inventors: Naohiro Hayakawa; 直広早川
Original assignee: Makita Corp
Current assignee: Makita Corp
Priority date: 2003-11-17
Filing date: 2003-11-17
Publication date: 2005-06-09

Abstract

<P>PROBLEM TO BE SOLVED: To maintain a using feeling; and to protect a workpiece with a simple constitution. <P>SOLUTION: An impact driver 10 is attached with a bumper 1 having a tip protective part 2 and a pair of side surface protective parts 4 and 4. That is, a spindle 12 is penetrated through a through-hole 3 of the tip protective part 2, and the tip protective part 2 is laid on the tip of a housing 11 as it is. Next, the left and right side surface protective parts 4 and 4 are extended backward along a side surface of the housing 11, and through-holes 5 and 5 are respectively fitted to bosses 15 and 15 bored on both the left and right sides. Then, the bumper 1 is installed on the housing 11 in a state of covering the tip and left-right side surfaces of the housing 11. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、インパクトドライバ等の電動工具に装着される電動工具用バンパーと、そのバンパーを装着した電動工具とに関する。 The present invention relates to a power tool bumper mounted on a power tool such as an impact driver, and a power tool mounted with the bumper.

インパクトドライバ等、前方にスピンドルを突出させたハウジングを有する電動工具においては、ハウジングが金属や硬質の合成樹脂で形成される。このため、インパクトドライバ等では使用によって高温となるハウジングに触れて不快な思いをしたり、長時間の使用によって手の疲労が増したりすることがある。そこで、特許文献１に開示の如く、ハウジングの表面に、エラストマーを部分的に一体形成して、使用感の向上を図るようにした技術が知られている。 In an electric power tool having a housing with a spindle projecting forward, such as an impact driver, the housing is formed of metal or hard synthetic resin. For this reason, an impact driver or the like may feel uncomfortable by touching a housing that becomes hot during use, or may increase hand fatigue due to prolonged use. Therefore, as disclosed in Patent Document 1, a technique is known in which an elastomer is partially formed integrally on the surface of a housing so as to improve the feeling of use.

特開２００３−３９３４６号公報JP 2003-39346 A

エラストマーを形成したものは、形成部分が主にハンドルであるため、使用感の向上には効果的ではあるが、エラストマーを施さないハウジングの前方や側面は金属等が露出しているから、使用中にハウジングが当接して被加工材を傷付けたりするおそれがある。かといってエラストマーの形成部分を広くすると製造コストがかさむ一方、一旦形成したエラストマーは取り除くことができないため、電動工具のデザインが固定化してしまう。 The one formed with an elastomer is effective for improving the feeling of use because the formed part is mainly a handle, but the metal is exposed on the front and side of the housing where the elastomer is not applied. The housing may come into contact with the workpiece and damage the workpiece. On the other hand, if the formation portion of the elastomer is widened, the manufacturing cost is increased. On the other hand, the elastomer once formed cannot be removed, so that the design of the electric tool is fixed.

そこで、本発明は、簡単な構成で、使用感の維持と被加工材の保護とが可能となり、電動工具のデザインの変更も容易な電動工具用バンパー及び電動工具を提供することを目的としたものである。 Therefore, the present invention has an object to provide a power tool bumper and a power tool that can maintain a feeling of use and protect a workpiece with a simple configuration, and can easily change the design of the power tool. Is.

上記目的を達成するために、請求項１に記載の発明は、電動工具用バンパーとして、ハウジングへの装着状態でスピンドルを除いてハウジングの前方部分を覆う先端保護部と、その先端保護部に延設され、ハウジングへの装着状態でハウジングの側面部分を覆う側面保護部とを備えて弾性材料で形成され、側面保護部に、ハウジングとの結合手段を設けたことを特徴とするものである。
請求項２に記載の発明は、請求項１の目的に加えて、ハウジングの既存の構成を利用して電動工具用バンパーの装着を簡単に行うために、結合手段を、ハウジングの側面に突設したブラシ交換部に嵌合可能な透孔としたものである。
上記目的を達成するために、請求項３に記載の発明は、電動工具として、ハウジングに、請求項１または２に記載のバンパーを装着したことを特徴とするものである。 In order to achieve the above-described object, the invention according to claim 1 is a bumper for an electric power tool, a tip protection portion that covers the front portion of the housing except for the spindle when mounted on the housing, and extends to the tip protection portion. Provided with a side surface protection portion that covers the side surface portion of the housing when mounted on the housing, and is formed of an elastic material, and the side surface protection portion is provided with means for coupling with the housing.
According to a second aspect of the present invention, in addition to the object of the first aspect, in order to easily mount the bumper for the electric tool using the existing configuration of the housing, the coupling means is provided on the side surface of the housing. Through-holes that can be fitted into the brush replacement part.
In order to achieve the above object, the invention according to claim 3 is characterized in that the bumper according to claim 1 or 2 is mounted on a housing as an electric tool.

請求項１及び３に記載の発明によれば、被加工材の損傷が効果的に防止されると共に、作業者の使用感も損なわずに良好な使い勝手が得られる。また、バンパーは着脱が容易であるから、ハウジングの成形精度に関係なく、既存の電動工具にも簡単に装着して被加工材保護等が期待できる上、色や形状の異なるバンパーを選択して付け替えることで、製品イメージを簡単に変更でき、デザイン性も向上する。勿論、バンパー自体の損傷等にも交換によって容易に対応できる。
請求項２に記載の発明によれば、請求項１の効果に加えて、ハウジングのブラシ交換部を利用して電動工具用バンパーを簡単に装着することができる。
According to invention of Claim 1 and 3, while being able to prevent damage to a workpiece effectively, favorable usability is obtained, without impairing an operator's usability. In addition, since the bumper is easy to attach and detach, regardless of the molding accuracy of the housing, it can be easily mounted on existing power tools to protect the work material, etc., and bumpers with different colors and shapes can be selected. By replacing it, the product image can be changed easily and the design is improved. Of course, damage to the bumper itself can be easily dealt with by replacement.
According to the second aspect of the present invention, in addition to the effect of the first aspect, the electric tool bumper can be easily mounted using the brush replacement portion of the housing.

以下、本発明の実施の形態を図面に基づいて説明する。
図１は、電動工具用バンパー（以下単に「バンパー」と言う。）の斜視図で、バンパー１は、エラストマー製で白色半透明の一体成形品で、前端（同図の左側）には、中央に貫通孔３を有し、電動工具のハウジングの先端に装着可能な円錐状の先端保護部２が形成されている。また、先端保護部２の後縁には、一対の帯状の側面保護部４，４が左右対称に連設されている。この側面保護部４，４の後端には、結合手段としての透孔５，５が夫々穿設されている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a bumper for an electric tool (hereinafter, simply referred to as “bumper”). A conical tip protecting portion 2 that has a through hole 3 and can be attached to the tip of the housing of the electric power tool is formed. In addition, a pair of band-shaped side surface protection parts 4, 4 are connected symmetrically to the rear edge of the tip protection part 2. At the rear ends of the side surface protection parts 4 and 4, through holes 5 and 5 are formed as coupling means.

以上の如く構成されたバンパー１は、前方へ行く程先細りとなるハウジングの先端にスピンドルを突出させた電動工具、例えばインパクトドライバやインパクトレンチ等の電動工具に装着される。図２及び図３は、インパクトドライバ１０にバンパー１を装着した状態を示すもので、このインパクトドライバ１０は、モータや減速機構を内蔵した先細りのハウジング１１の先端にスピンドル１２を突出させ、ハウジング１１の下方に、バッテリーパック１３を装着したハンドル１４を延設してなる。よって、このインパクトドライバ１０にバンパー１を装着する場合、まず先端保護部２の貫通孔３にスピンドル１２を貫通させ、そのまま先端保護部２をハウジング１１の先端に嵌着する。次に、左右の側面保護部４，４をハウジング１１の側面に沿って後方へ伸ばし、透孔５，５を、ハウジング１１の左右両側に突設されたブラシ交換部としてのボス１５，１５に夫々嵌合させる。すると、同図に示すように、バンパー１はハウジング１１の先端と左右の側面とを覆う状態で装着される。 The bumper 1 configured as described above is attached to a power tool such as an impact driver or an impact wrench having a spindle protruding from the front end of a housing that tapers toward the front. FIGS. 2 and 3 show a state in which the bumper 1 is mounted on the impact driver 10. The impact driver 10 has a spindle 12 protruding from the tip of a tapered housing 11 incorporating a motor and a speed reduction mechanism, and the housing 11 A handle 14 to which the battery pack 13 is attached is extended below. Therefore, when the bumper 1 is attached to the impact driver 10, first, the spindle 12 is passed through the through hole 3 of the tip protection portion 2, and the tip protection portion 2 is fitted to the tip of the housing 11 as it is. Next, the left and right side surface protection parts 4, 4 are extended rearward along the side surface of the housing 11, and the through holes 5, 5 are formed on the bosses 15, 15 as brush replacement parts protruding from the left and right sides of the housing 11. Fit each one. Then, as shown in the figure, the bumper 1 is mounted in a state of covering the front end of the housing 11 and the left and right side surfaces.

よって、インパクトドライバ１０を使用してネジ締め作業を行う際、誤ってハウジング１１の先端を被加工材にぶつけても、先端保護部２によって被加工材の損傷が防止される。また、作業者がハウジング１１に手を添えて作業を行うような場合に、ハウジング１１の温度が高くなっていても、側面保護部４，４によってハウジング１１を直接触れないで済む。さらに、インパクトドライバ１０を横向きにして置いた場合には、側面保護部４のみが床面等に接触するため、被加工材の上にインパクトドライバ１０を置いても、インパクトドライバ１０が滑ったり、被加工材を傷付けたりすることがない。 Therefore, when performing the screw tightening operation using the impact driver 10, even if the tip of the housing 11 is accidentally hit against the workpiece, the tip protection unit 2 prevents the workpiece from being damaged. Further, when the worker performs a work with his / her hand on the housing 11, even if the temperature of the housing 11 is high, it is not necessary to directly touch the housing 11 by the side surface protection parts 4 and 4. Furthermore, when the impact driver 10 is placed sideways, only the side protection part 4 comes into contact with the floor surface or the like, so even if the impact driver 10 is placed on the workpiece, the impact driver 10 slips. The work material is not damaged.

なお、透孔５，５は、側面保護部４をやや後方に引っ張らないとボス１５，１５に嵌合しない寸法設定となっているため、この装着状態では側面保護部４，４はハウジング１１の側面に密着し、塵埃等の侵入や脱却のおそれはない。また、バンパー１の装着状態でもボス１５内のブラシキャップ１６は露出しているので、ブラシの着脱に支障は生じない。
一方、バンパー１を取り外す際は、上記手順と逆に、側面保護部４，４の後端をハウジング１１から引き起こして透孔５，５をボス１５，１５から抜き取り、そのままバンパー１を前方へ移動させて先端保護部２をハウジング１１から外し、最後にスピンドル１２から抜き取ればよい。 Since the through holes 5 and 5 are dimensioned so that they do not fit into the bosses 15 and 15 unless the side protection part 4 is pulled slightly rearward, the side protection parts 4 and 4 are attached to the housing 11 in this mounted state. Adhering to the side, there is no risk of dust intrusion or escape. Further, even when the bumper 1 is mounted, the brush cap 16 in the boss 15 is exposed, so that there is no problem in attaching and detaching the brush.
On the other hand, when removing the bumper 1, the rear ends of the side surface protection parts 4, 4 are raised from the housing 11 to remove the through holes 5, 5 from the bosses 15, 15, and the bumper 1 is moved forward as it is. Then, the tip protection part 2 may be removed from the housing 11 and finally removed from the spindle 12.

このように上記形態のバンパー１及びバンパー１を装着したインパクトドライバ１０によれば、被加工材の損傷が効果的に防止されると共に、作業者の使用感も損なわずに良好な使い勝手が得られる。また、バンパー１は着脱が容易であるから、ハウジング１１の成形精度に関係なく、既存の電動工具にも簡単に装着して被加工材保護等が期待できる上、色や形状の異なるバンパーを選択して付け替えることで、製品イメージを簡単に変更でき、デザイン性も向上する。勿論、バンパー自体の損傷等にも交換によって容易に対応できる。
また、結合手段を、ハウジング１１の側面に突設したボス１５，１５に嵌合可能な透孔５，５としているから、ハウジング１１の既存の構成を利用してバンパー１の装着が簡単に行える。 As described above, according to the bumper 1 and the impact driver 10 equipped with the bumper 1, damage to the workpiece is effectively prevented, and good usability can be obtained without impairing the operator's feeling of use. . In addition, since the bumper 1 can be easily attached and detached, regardless of the molding accuracy of the housing 11, it can be easily mounted on an existing electric tool to protect the work material, and a bumper with a different color or shape can be selected. This makes it easy to change the product image and improve design. Of course, damage to the bumper itself can be easily dealt with by replacement.
Further, since the coupling means is the through holes 5 and 5 that can be fitted into the bosses 15 and 15 projecting from the side surface of the housing 11, the bumper 1 can be easily mounted using the existing configuration of the housing 11. .

なお、バンパーの形状は上記形態に限定するものではなく、先端保護部では、後縁をさらに後方にしてハウジングの先端部分を覆う面積をより広くしたり、側面保護部は帯状の幅をさらに広くしてハウジングの側面を覆う面積を広くしたりできる。また、側面保護部同士を接続する接続部をハウジングの周方向に延設しても差し支えない。すなわち、装着する電動工具の形状に合わせて、先端保護部や側面保護部の形状は適宜変更可能である。
さらに、バンパーは、着色や印刷によってデザイン性を高めたりすることもできるが、上記形態のように半透明や透明のものとすると、ハウジングの側面に設けたネームプレートや社定マーク等を視認可能としつつ側面保護部によって保護できる。
その他、成形材料としてはエラストマー以外の軟質合成樹脂を採用しても良い。 In addition, the shape of the bumper is not limited to the above-described form. In the tip protection part, the rear edge is further rearward to increase the area covering the tip of the housing, and the side protection part has a wider band shape. Thus, the area covering the side surface of the housing can be increased. In addition, a connection portion that connects the side surface protection portions may extend in the circumferential direction of the housing. That is, the shape of the tip protecting part and the side protecting part can be changed as appropriate in accordance with the shape of the electric tool to be mounted.
In addition, the design of the bumper can be enhanced by coloring or printing, but if it is translucent or transparent as in the above form, the nameplate and company mark provided on the side of the housing can be visually confirmed. However, it can be protected by the side protection part.
In addition, a soft synthetic resin other than an elastomer may be employed as the molding material.

そして、バンパーを装着する電動工具は、インパクトドライバに限らず、バンパーが装着可能なハウジングであれば、インパクトレンチや電動ドライバ、電動ドリル、電動ドライバドリル等でも差し支えない。また、ハウジングにおいては、バンパーの装着部位を凹面にして、バンパーの位置ズレ防止を図るようにしても良い。勿論この位置ズレ防止は、ハウジングの表面に設けた凹部（透孔も含む）とバンパーの裏面に設けたリブ等の凸部との嵌合によって図ることもできる。なお、この凹凸は逆にしても良い。
The electric tool for mounting the bumper is not limited to the impact driver, and an impact wrench, an electric driver, an electric drill, an electric driver drill, or the like may be used as long as the bumper can be mounted on the housing. Further, in the housing, the bumper mounting portion may be a concave surface to prevent the bumper from being displaced. Of course, this misalignment prevention can also be achieved by fitting a concave portion (including a through hole) provided on the surface of the housing with a convex portion such as a rib provided on the back surface of the bumper. The unevenness may be reversed.

バンパーの斜視図である。It is a perspective view of a bumper. バンパーを装着したインパクトドライバの斜視図である。It is a perspective view of an impact driver equipped with a bumper. バンパーの断面図である。It is sectional drawing of a bumper.

Explanation of symbols

１・・バンパー、２・・先端保護部、４・・側面保護部、５・・透孔、１０・・インパクトドライバ、１１・・ハウジング、１２・・スピンドル、１５・・ボス。
1 .... bumper, 2 .... tip protection part, 4 .... side protection part, 5 .... through hole, 10 .... impact driver, 11 .... housing, 12 .... spindle, 15 .... boss.

Claims

A power tool bumper mounted on a power tool housing with a spindle protruding forward,
A tip protector that covers the front portion of the housing except for the spindle when mounted on the housing, and a side protector that extends to the tip protector and covers the side portion of the housing when mounted on the housing And a bumper for an electric tool, characterized in that a means for coupling to the housing is provided on the side surface protection portion.

The bumper for an electric tool according to claim 1, wherein the coupling means is a through-hole that can be fitted into a brush replacement portion protruding from a side surface of the housing.

An electric power tool having a housing with a spindle protruding forward, wherein the bumper according to claim 1 is mounted on the housing.