JP3376146B2 - Portable electric marunoco - Google Patents
Portable electric marunocoInfo
- Publication number
- JP3376146B2 JP3376146B2 JP01680095A JP1680095A JP3376146B2 JP 3376146 B2 JP3376146 B2 JP 3376146B2 JP 01680095 A JP01680095 A JP 01680095A JP 1680095 A JP1680095 A JP 1680095A JP 3376146 B2 JP3376146 B2 JP 3376146B2
- Authority
- JP
- Japan
- Prior art keywords
- viewing window
- air
- blade case
- chips
- portable electric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0042—Devices for removing chips
- B23Q11/005—Devices for removing chips by blowing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D59/00—Accessories specially designed for sawing machines or sawing devices
- B23D59/001—Measuring or control devices, e.g. for automatic control of work feed pressure on band saw blade
- B23D59/002—Measuring or control devices, e.g. for automatic control of work feed pressure on band saw blade for the position of the saw blade
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D59/00—Accessories specially designed for sawing machines or sawing devices
- B23D59/006—Accessories specially designed for sawing machines or sawing devices for removing or collecting chips
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sawing (AREA)
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】この発明は、携帯用電気マルノコ
に関し、詳しくは覗き窓近傍の切粉の吹き飛ばし構造に
関する。
【０００２】
【従来の技術】電気マルノコを用いて切断作業を行う場
合に、適切な向きでマルノコを把持するとブレードの裏
面側はブレードケースで遮蔽されているので、歯先すな
わち切断箇所が目視できず、このため従来より適当な部
位例えばブレードケースの裏面前部に覗き窓を切欠き形
成して、ブレードケース裏面側に位置する作業者から切
断箇所を目視できるようにしている。
【０００３】
【発明が解決しようとする課題】しかしながら、上記の
ように覗き窓を単に切り欠いただけで設けた場合には、
切断作業中にこの覗き窓から切粉が吹き出され、これが
作業者に向けて吹き付けられるという問題があった。こ
こで、この覗き窓を透明な樹脂板等で遮蔽しておくこと
により切粉吹き出しの問題は解決され、かつ歯先の目視
も可能となるのであるが、この場合には切粉が樹脂板に
付着してすぐに覗き窓としての機能を果たさなくなるの
で、たびたび付着した切粉を拭き取る必要が生ずるので
あるが、この拭き取り作業は、ブレードとブレードケー
スとの間の隙間がごくわずかであるという構造上の理由
からブレードを外さなければ不可能であり、従って覗き
窓を透明の樹脂板とすることは現実的な解決策とはいえ
ない。
【０００４】本発明はかかる問題に鑑みなされたもの
で、上記のように覗き窓を透明の樹脂板で遮蔽した場合
のような問題がなく、覗き窓を経て歯先の目視が可能で
あり、かつこの覗き窓から吹き出される切粉が作業者に
吹き付けられることを防止できる携帯用電気マルノコを
提供することを目的とする。
【０００５】
【課題を解決するための手段】このため、本願発明は、
前記請求項１に記載した構成の携帯用電気マルノコとし
た。
【０００６】
【作用】請求項１記載の構成によれば、覗き窓から吹き
出される切粉は、空気吹き出し孔から排出される風によ
って、切断方向前方に吹き飛ばされる。なお、覗き窓
は、その目的から通常ブレードケースの裏面前部に設け
られ、従って空気吹き出し孔が設けられたギヤケーシン
グ部はこの覗き窓よりも後ろ側に位置する。このことか
ら、空気吹き出し孔から覗き窓近傍に向けて排出された
風は切断方向前方に向けた空気の流れとなり、一種のエ
アカーテンを形成する。また、マルノコを適切な向きで
把持すれば、作業者はマルノコに対して切断方向後ろ側
に位置するので、覗き窓から排出される切粉が切断方向
前方に吹き飛ばされれば、この切粉が作業者に吹き付け
られることはなくなる。
【０００７】
【発明の効果】請求項１記載の発明によれば、歯先の目
視をするために設けた覗き窓から吹き出される切粉は切
断方向前方に吹き飛ばされるので、作業者に吹き付けら
れることはなくなり、歯先部分が見やすくなる。
【０００８】
【実施例】次に、本発明の実施例を図１ないし図３に基
づいて説明する。図は、電気マルノコ１の前部（切断方
向前部、以下同じ）を示している。図中２は、裏面（図
示手前側の面）にギヤケーシング部２ａが一体に形成さ
れたブレードケースであり、このブレードケース２の内
部には円板形状のブレード３が装着されている。４はベ
ースであり、このベース４はブレードケース２の前端部
の回動支持部２ｂを介して上下方向に回動可能に取り付
けられており、これにより切込み深さの調整ができるよ
うになっている。
【０００９】このブレードケース２の、回動支持部２ｂ
のすぐ後ろ側（図示右側）であって、歯先（切断箇所、
以下同じ）の側方部位には覗き窓５が切欠き形成されて
いる。この覗き窓５を経て、切断方向後ろ側に位置する
作業者がブレードケース２の裏側（図示手前側）から歯
先を目視できるようになっている。
【００１０】この覗き窓５の側方（図示手前側）には、
作業者の視線を大きく妨げない範囲でアーチ状の遮蔽柵
６〜６が適度な間隔をおいて複数（図では３つで例示し
た）設けられており、この遮蔽柵６〜６によって、覗き
窓５から吹き出される切粉がそのまま側方に吹き出され
ることがある程度防止されるようになっている。この遮
蔽柵６の内側（覗き窓５側）は、切断方向前後に沿った
通風路７とされており、以下述べる空気吹き出し孔１０
から排出される空気（風）が切断方向後方から前方に向
けてスムーズに吹き抜けるようになっている。
【００１１】さて、上記空気吹き出し孔１０は、ギヤケ
ーシング部２ａの切断方向前側の側部であって、上記通
風路７のほぼ後方となる部位に設けられている。図２に
示すようにこのギヤケーシング部２ａに連設されたモー
タケース１１内には、当該マルノコ１の駆動源としての
モータ１２が内装されており、このモータ１２の出力軸
１２ａには、モータ冷却用のファン１３が取り付けられ
ている。このファン１３の回転によってモータケース１
１の後面（図示されていない）から外部の空気が吸入さ
れ、吸入された空気はモータ１２を冷却しながら前方
（図示上方）に流れ、然る後ファン１３よりも前側の空
気室１５内に流れ込む。この空気が空気吹き出し孔１０
を経て、前方に位置する覗き窓５の近傍に向けて排出さ
れる。この空気の流れ（排出風）が、図において白抜き
の矢印で示されている。なお、この空気吹き出し孔１０
は小径の円形孔であり、比較的小さな開口面積で設けら
れているため、空気室１５内よりもさらに絞られて強く
吹き出される。
【００１２】ブレードケース２の裏面には、上記空気吹
き出し孔１０から通風路７に至る通風経路の上方に張り
出すようにしてリブ１６が形成されており、このリブ１
６によって、空気吹き出し孔１０から吹き出された空気
は放散することを抑制されつつ案内されて効率よく通風
路７の入口に至るようになっている。但し、このリブ１
６は切断作業中後方に位置する作業者の、覗き窓５への
視線を遮らない範囲で張出し形成されている。
【００１３】以上のように構成された本例の携帯用電気
マルノコによれば、モータ１２が回転されると、空気吹
き出し孔１０から排出風が前方すなわち覗き窓５の近傍
に向けて排出される。すなわち、空気吹き出し孔１０か
ら前方に向けて排出された空気は、リブ１６に案内され
て効率よく通風路７に流れ込む。一方、切断作業時にお
いて、歯先付近から飛散する切粉の一部が覗き窓５を経
てブレードケース２の裏面側すなわち通風路７内に吹き
出される。しかしながら、通風路７内には、上記空気吹
き出し孔１０から排出された空気が流れ込むことによっ
て後方から前方に吹き抜ける空気の流れ（図において白
抜きの矢印で示した流れ）が形成され、エアカーテンを
形成しているので、覗き窓５を経て吹き出された切粉は
この空気の流れに乗って即座に通風路７の前側出口から
前方に向けて吹き飛ばされる。また、切断作業中覗き窓
５を経て吹き出される切粉が遮蔽柵６，６間の隙間を経
て若干量側方に出たとしても、空気吹き出し孔１０から
排出された空気によって前方に吹き飛ばされ、作業者に
吹き付けられることはなくなる。
【００１４】また、覗き窓５は、単にブレードケース２
を切り欠いて形成したものであるので、前記透明の樹脂
板で遮蔽した場合のように切粉が付着することもなく、
何ら手間をかけることなく覗き窓としての機能を維持で
きる。
【００１５】なお、本例ではギヤケーシング部２ａがブ
レードケース２に一体設けられたタイプのマルノコを例
示して説明したが、このギヤケーシング部がブレードケ
ース２側ではなくモータケース１１側に一体に設けられ
た構成のものであっても同様に適用可能である。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable electric saw, and more particularly, to a structure for blowing away chips near a viewing window. 2. Description of the Related Art When performing a cutting operation using an electric saw, if the saw is gripped in an appropriate direction, the back side of the blade is shielded by a blade case, so that the tooth tip, that is, the cut portion can be visually observed. Instead, a viewing window is cut out at an appropriate portion, for example, at the front portion of the back surface of the blade case so that an operator located on the back side of the blade case can visually recognize the cut portion. [0003] However, in the case where the viewing window is provided only by notching as described above,
During the cutting operation, there is a problem that chips are blown out of the viewing window and are blown toward the operator. Here, by shielding this viewing window with a transparent resin plate or the like, the problem of chip blowing can be solved and the tooth tip can be visually checked. As soon as it adheres to the surface, it no longer functions as a viewing window, so it often becomes necessary to wipe off the attached chips, but this wiping work requires only a small gap between the blade and the blade case. For structural reasons, it is not possible without removing the blade, so making the viewing window a transparent resin plate is not a practical solution. The present invention has been made in view of such a problem, and does not have a problem as in the case where the viewing window is shielded by the transparent resin plate as described above, and allows visual observation of the tooth tip through the viewing window. Further, it is an object of the present invention to provide a portable electric circular saw that can prevent chips blown from the viewing window from being blown to an operator. [0005] Accordingly, the present invention provides
A portable electric circular saw having a configuration according to claim 1.
Was. According to the first aspect of the present invention, the chips blown out of the viewing window are blown forward in the cutting direction by the wind discharged from the air blowing hole. The viewing window is normally provided at the front portion of the back surface of the blade case for that purpose, and therefore, the gear casing portion provided with the air blowing holes is located behind the viewing window. For this reason, the wind discharged from the air blowing hole toward the vicinity of the viewing window becomes a flow of air directed forward in the cutting direction, and forms a kind of air curtain. In addition, if the cutting tool is gripped in an appropriate direction, the worker is located behind the cutting tool in the cutting direction, so if the cutting chips discharged from the viewing window are blown forward in the cutting direction, the cutting chips are removed. It is no longer sprayed on workers. According to the first aspect of the present invention, the chips blown out from the viewing window provided for visual observation of the tooth tip are blown forward in the cutting direction, so that the chips are blown to the operator. And the tip is easier to see. Next, an embodiment of the present invention will be described with reference to FIGS. The figure shows the front part of the electric circular saw 1 (the front part in the cutting direction, the same applies hereinafter). In the figure, reference numeral 2 denotes a blade case in which a gear casing portion 2a is integrally formed on a back surface (a surface on the front side in the figure), and a disk-shaped blade 3 is mounted inside the blade case 2. Reference numeral 4 denotes a base, and the base 4 is mounted to be rotatable in the vertical direction via a rotation support portion 2b at the front end of the blade case 2, so that the cutting depth can be adjusted. I have. The rotation support portion 2b of the blade case 2
Right behind (right side in the figure),
A viewing window 5 is cut out at a side portion of the same. An operator located on the rear side in the cutting direction can view the tooth tip from the back side (front side in the figure) of the blade case 2 through the viewing window 5. At the side of the viewing window 5 (on the front side in the figure),
And provided with a plurality (exemplified by three in the figure) at an arcuate shielding fence 6 to 6 moderate intervals in a range not greatly hindered the work line of sight, by the shielding fence 6-6, viewing window The cutting chips blown out from 5 are prevented from being blown to the side as it is to some extent. The inside of the shielding fence 6 (on the side of the viewing window 5) is a ventilation passage 7 extending in the front and rear direction of the cutting direction.
The air (wind) discharged from the air blows smoothly from the rear in the cutting direction to the front. The air blow-out hole 10 is provided at a portion on the front side in the cutting direction of the gear casing portion 2a and substantially behind the ventilation passage 7. As shown in FIG. 2, a motor 12 serving as a drive source for the circular saw 1 is provided in a motor case 11 connected to the gear casing 2a, and an output shaft 12a of the motor 12 is provided with a motor. A cooling fan 13 is attached. The rotation of the fan 13 causes the motor case 1
External air is sucked in from the rear surface (not shown) of the vehicle 1 and flows forward (upward in the figure) while cooling the motor 12, and then enters the air chamber 15 on the front side of the fan 13. Flow in. This air is supplied to the air blowing holes 10.
Is discharged toward the vicinity of the viewing window 5 located at the front. This flow of air (exhaust air) is indicated by a white arrow in the figure. In addition, this air blowing hole 10
Is a small-diameter circular hole, which is provided with a relatively small opening area. A rib 16 is formed on the back surface of the blade case 2 so as to protrude above a ventilation path from the air blowing hole 10 to the ventilation path 7.
6, the air blown out from the air blowout hole 10 is guided while being suppressed from being diffused, and efficiently reaches the entrance of the ventilation path 7. However, this rib 1
Reference numeral 6 is formed so as to protrude in a range that does not block the line of sight of the operator located behind during the cutting operation. According to the portable electric circular saw of the present embodiment configured as described above, when the motor 12 is rotated, the exhaust air is exhausted from the air outlet 10 toward the front, that is, near the viewing window 5. . That is, the air discharged forward from the air blowing holes 10 is guided by the ribs 16 and flows into the ventilation passage 7 efficiently. On the other hand, at the time of the cutting operation, a part of the chips scattered from the vicinity of the tooth tip is blown out through the viewing window 5 to the back side of the blade case 2, that is, into the ventilation path 7. However, a flow of air (flow indicated by a white arrow in the figure) that flows from the rear to the front due to the flow of the air discharged from the air blowing hole 10 is formed in the ventilation path 7, and the air curtain is formed. Since it is formed, the chips blown out through the viewing window 5 are immediately blown forward from the front exit of the ventilation path 7 on the flow of the air. Further, even if the chips blown out through the viewing window 5 during the cutting operation are slightly laterally discharged through the gap between the shielding fences 6, they are blown forward by the air discharged from the air blowing holes 10. It will not be sprayed on the workers. The viewing window 5 is simply a blade case 2
Since it is formed by notching, no chips adhere as in the case of being shielded by the transparent resin plate,
The function as a viewing window can be maintained without any trouble. In this embodiment, the case where the gear casing 2a is provided integrally with the blade case 2 has been described by way of example. However, this gear casing is integrated not on the blade case 2 but on the motor case 11 side. The same configuration can also be applied to the provided configuration.
【図面の簡単な説明】
【図１】本発明の実施例を示し、マルノコの前部を示す
斜視図である。
【図２】同じく、マルノコの前部を示す平面図である。
【図３】同じく、マルノコの前部を示す背面図である。
【符号の説明】
２…ブレードケース、２ａ…ギヤケーシング部
５…覗き窓、６…遮蔽柵、７…通風路
１０…空気吹き出し孔
１１…モータケース、１３…ファン、１５…空気室
１６…リブBRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of the present invention and showing a front portion of a circular saw. FIG. 2 is also a plan view showing a front portion of the circular saw. FIG. 3 is also a rear view showing a front portion of the circular saw. [Description of Signs] 2 ... Blade case, 2a ... Gear casing part 5 ... View window, 6 ... Shielding fence, 7 ... Ventilation path 10 ... Air blowing hole 11 ... Motor case, 13 ... Fan, 15 ... Air chamber 16 ... Rib
フロントページの続き (72)発明者 小野 雅彦 愛知県安城市住吉町３丁目11番８号 株 式会社マキタ内 (72)発明者 野田 有谷 愛知県安城市住吉町３丁目11番８号 株 式会社マキタ内 (56)参考文献 実開 昭61−64411（ＪＰ，Ｕ) 実開 昭62−114705（ＪＰ，Ｕ) 実開 昭61−37902（ＪＰ，Ｕ) 実開 昭57−68301（ＪＰ，Ｕ) 実開 昭62−53106（ＪＰ，Ｕ) 実公 昭42−14556（ＪＰ，Ｙ１) (58)調査した分野(Int.Cl.7，ＤＢ名) B27G 19/02 B27B 9/00 Continued on the front page (72) Inventor Masahiko Ono 3-11-8 Sumiyoshicho, Anjo-shi, Aichi Prefecture Inside Makita Co., Ltd. (72) Inventor Ariya Noda 3-11-8 Sumiyoshicho, Anjo-shi, Aichi Prefecture Stock Company (56) References JP-A 61-64411 (JP, U) JP-A 62-114705 (JP, U) JP-A 61-37902 (JP, U) JP-A 57-68301 (JP, U.S.A.) U) Japanese Utility Model Showa 62-53106 (JP, U) Japanese Utility Model Showa 42-14556 (JP, Y1) (58) Fields investigated (Int. Cl. 7 , DB name) B27G 19/02 B27B 9/00
Claims (1)
孔を設け、該空気吹き出し孔を経て、前記モータのファ
ンにより発生する風を、切断箇所の目視をするためにブ
レードケースに切欠き形成した覗き窓近傍に向けて、前
記ブレードケースの外側から切断方向前方へ向けて吹き
付ける構成としたことを特徴とする携帯用電気マルノ
コ。(57) [Claim 1] An air blowing hole is provided in a side portion of a gear casing portion, and wind generated by a fan of the motor is visually observed at a cut portion through the air blowing hole. towards viewing window near formed notches in the blade case for the previous
Blow from the outside of the blade case forward in the cutting direction
A portable electric circular saw characterized in that it is configured to be attached .
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01680095A JP3376146B2 (en) | 1995-02-03 | 1995-02-03 | Portable electric marunoco |
| DE19602440A DE19602440C2 (en) | 1995-02-03 | 1996-01-24 | circular saw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01680095A JP3376146B2 (en) | 1995-02-03 | 1995-02-03 | Portable electric marunoco |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08207014A JPH08207014A (en) | 1996-08-13 |
| JP3376146B2 true JP3376146B2 (en) | 2003-02-10 |
Family
ID=11926238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP01680095A Expired - Fee Related JP3376146B2 (en) | 1995-02-03 | 1995-02-03 | Portable electric marunoco |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3376146B2 (en) |
| DE (1) | DE19602440C2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1313107B1 (en) * | 1998-08-14 | 2002-06-17 | Milwaukee Electric Tool Corp | CIRCULAR SAW PERFECTED |
| US6094827A (en) * | 1999-02-23 | 2000-08-01 | Black & Decker, Inc. | Viewing window lockout mechanism for power tool |
| US6543143B2 (en) | 2001-04-06 | 2003-04-08 | Black & Decker Inc. | Metal cutting circular saw with integral sight window |
| JP2003011101A (en) * | 2001-06-29 | 2003-01-15 | Ryobi Ltd | Hand-held electric tool |
| JP5649834B2 (en) | 2010-03-04 | 2015-01-07 | 株式会社マキタ | Hand-held cutting tool |
| JP5885557B2 (en) * | 2012-03-28 | 2016-03-15 | リョービ株式会社 | Cutting machine |
| JP6249214B2 (en) * | 2013-12-19 | 2017-12-20 | パナソニックＩｐマネジメント株式会社 | Electric circular saw |
| CN106270772B (en) * | 2016-09-30 | 2018-03-13 | 张祥华 | Dustless building materials cut sanding apparatus without dead angle |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3104340C2 (en) * | 1980-03-06 | 1986-06-05 | AEG Power Tool Corp. (APTC), Norwich, Conn. | Portable circular saw |
| US4450627A (en) * | 1981-07-06 | 1984-05-29 | Shindaiwa Kogyo Co., Ltd. | Device for determining a correct sawing position for a portable rotary sawing machine |
| DE4016774A1 (en) * | 1990-05-25 | 1991-11-28 | Bosch Gmbh Robert | MANUAL ELECTRIC MACHINE TOOL |
| DE4121989A1 (en) * | 1991-07-03 | 1993-01-07 | Festo Kg | JIGSAW |
-
1995
- 1995-02-03 JP JP01680095A patent/JP3376146B2/en not_active Expired - Fee Related
-
1996
- 1996-01-24 DE DE19602440A patent/DE19602440C2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08207014A (en) | 1996-08-13 |
| DE19602440A1 (en) | 1996-08-08 |
| DE19602440C2 (en) | 2003-07-24 |
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