JP2007044891A - Electromotive circular saw with cut powder recovery mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromotive circular saw with a cut powder recovery mechanism capable of recovering a cut powder inexpensively and efficiently. <P>SOLUTION: The electromotive circular saw 1 has a circular saw body 2 and the cut powder recovery mechanisms 3. The cut powder recovery mechanism 3 is equipped with a seal member 4 comprising paper clay, which is charged in the front end part 25c of the cover part 25b of a saw blade cover 25 and a dust hood 5 for covering the front part of the right-hand surface of the circular saw blade 24 and the seal member 4 has an opening part permitting the edge of the circular saw blade 24. The cut powder involved in the cover part 25b of the saw blade cover 25 is scraped off by the circular saw blade 24. The scattering of the cut powder to the right-hand side of the circular saw blade 24 is inhibited by the dust hood 5. The formed dust is stored in the dust hood 5 by the seal member 4 and the dust hood 5 without being scattered to the circumference. The cut powder recovery mechanism can also be provided to an existing electromotive circular saw by attaching the seal member 4 and the dust hood 5 to the cut powder recovery mechanism 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electric circular saw with a chip collection function capable of efficiently collecting chips generated from a cutting portion of a circular saw blade and scattered around the same with a simple configuration.

The problem with the cutting operation using the electric circular saw is that the dust generated by the cutting scatters to the surroundings, so that countermeasures against dust are necessary. That is, the working environment is deteriorated by the generated chips, and it is necessary to collect the chips scattered around. In order to solve this problem, Patent Document 1 discloses a hand-held electric circular saw with a chip collection mechanism attached thereto.
JP-A-6-190628

  However, such an electric circular saw with a chip collection mechanism is expensive and is not widely used.

  An object of the present invention is to propose an electric circular saw having an inexpensive mechanism capable of efficiently collecting chips.

  Another object of the present invention is to propose a chip collection kit for imparting a chip collection function to an existing electric circular saw.

  In order to solve the above-described problem, in the electric circular saw chip collecting method of the present invention, the cover portion of the U-shaped cross section of the saw blade cover covering the upper half outer peripheral portion of the circular saw blade of the electric circular saw is provided. A sealing member is attached to the front end portion, the front end portion is sealed in a state where only the blade tip portion of the circular saw blade can pass through, and the cutting blade is cut into the saw blade cover by the circular saw blade from the cutting position of the object to be cut. By scraping off the powder from the circular saw blade by the sealing member, it is possible to prevent generation of swarf that is wound around the saw blade cover by the circular saw blade and splashes backward from the rear end portion of the saw blade cover. It is characterized by that.

  The swarf wound on the saw blade cover by the rotating circular saw blade is scraped off by the sealing member attached to the front end portion thereof. Therefore, generation | occurrence | production of the swarf which is wound in the saw blade cover and splashes back from the rear-end part can be prevented reliably.

  Here, in this invention, the said sealing member is made into the soft material with shape retention property which filled the front-end part of the cover part of the said saw cover. For example, paper clay is used. If such a blocking member is used, there is no problem even if the cutting edge of the circular saw blade hits the sealing member, and the portion through which the cutting edge of the circular saw blade passes is held in an open shape. Therefore, it is possible to reliably scrape off the chips from the circular saw blade.

  Next, in the present invention, the front side portion of the right side surface of the circular saw blade is covered with a dust hood. In the electric circular saw, a large amount of swarf is scattered in the right direction of the front side portion of the circular saw blade that is open. Therefore, by covering this part with a dust hood, scattering of chips can be effectively prevented.

  In the present invention, the chips collected inside the dust hood are sucked through a suction hose attached to the saw blade cover. The chips collected inside the dust hood can be efficiently sucked using an existing dust collector or the like.

  Next, the electric circular saw with a chip collection mechanism of the present invention is a circular saw blade, a saw blade cover provided with a cover portion of a U-shaped cross-section covering the upper half outer peripheral portion of the circular saw blade, A frame-like base that regulates the cutting depth by the circular saw blade, and a sealing member that seals the front end portion of the cover portion of the saw blade cover so that only the circular saw blade can pass through; And a dust hood covering a front side portion of the right side surface of the circular saw blade above the frame-like base.

  According to the electric circular saw with a chip collection mechanism of the present invention, the cutting member wound on the saw blade cover can be scraped off from the circular saw blade and collected inside the dust hood by the sealing member. In addition, the dust hood can keep the swarf scattered from the cutting position of the object to be cut (the front portion of the circular saw blade) to the surroundings (mainly in the right direction) inside the dust hood. Therefore, most of the swarf generated at the time of cutting can be collected inside the dust hood, the work environment can be prevented from deteriorating, and the trouble of collecting the scattered swarf after the cutting work can be saved.

  Here, it is preferable that the sealing member is a soft material having a shape retaining property filled in a front end portion of the saw cover. For example, paper clay can be used.

  Next, it is desirable to have a suction hose for sucking and collecting the collected chips inside the dust hood. When configured in this way, by connecting the end on the rear end side of the suction hose to, for example, a suction port of a general household or commercial cleaner, the chips in the dust hood are connected via the suction hose, A chip collection system that forcibly suctions the cleaner can be constructed.

  In the present invention, it is desirable that the dust hood is attached to the frame-shaped base in a state where it can be attached and detached by a magnetic force. In this way, the dust hood can be easily attached and detached.

  On the other hand, the present invention regulates the cutting depth by the circular saw blade, the saw blade cover having a U-shaped cross-section covering the upper half outer peripheral portion of the circular saw blade, and the cutting depth by the circular saw blade. A chip collection kit used by being attached to an electric circular saw having a frame-shaped base, wherein the front end portion of the cover portion of the saw blade cover is filled with the front end portion of the circular saw blade only. The shape-retaining soft filler used to block the frame so that it can pass through, and the frame-shaped base so as to cover the front side portion of the right side surface of the circular saw blade above the frame-shaped base. It has the dust hood which can be attached to.

  In the chip collection kit of the present invention, the front end portion of the cover portion of the saw blade cover is filled with a soft filler having a shape-retaining property so that only the circular saw blade can pass through the front end portion. At the same time, by attaching a dust hood to the frame-shaped base and covering the front part of the right side surface of the circular saw blade, all the chips scattered from the cutting position of the object to be cut (the front part of the circular saw blade) to the outer periphery Occurrence can be prevented.

  If a soft filler having a shape-retaining property is used, a shape suitable for scraping off chips from a circular saw blade can be obtained simply by packing it into the front end portion of the cover portion of the saw blade cover. Therefore, according to the present invention, an existing electric circular saw can be provided with a chip collection function by a simple operation of filling a soft filler and attaching a dust hood to the frame-shaped base.

  Here, the dust hood may be attached to the frame-like base by magnetic force so that it can be easily attached to the front part of the frame-like base having various shapes or structures. A part of the dust hood may be a magnet, or a magnet may be attached to the dust hood.

  Also, if you have a suction hose for sucking and collecting the chips collected inside the dust hood, you can easily collect the chips collected inside the dust hood using a general cleaner. It is possible to collect by sucking outside.

  In the present invention, attention is paid to the fact that most of the chips generated from the electric circular saw scatter to the back of the circular saw cover and from the front side portion of the circular saw blade to the surroundings (particularly the right side). This is dealt with by scraping off the swarf caught in the saw blade cover from the circular saw blade by the sealing member attached to the front end portion of the cover, and the latter is dealt with by attaching a dust cover. Therefore, the scattering of chips can be prevented with an extremely simple and inexpensive configuration.

  Moreover, the chip collection function can be imparted to the existing electric circular saw by a simple operation of attaching the sealing member and the dust cover to the existing electric circular saw.

  Embodiments to which the present invention is applied will be described below with reference to the drawings.

  FIGS. 1A and 1B are a perspective view of an electric circular saw with a chip collection mechanism to which the present invention is applied and a partial cross-sectional view showing a front end portion of a saw blade cover. FIG. 2 is a perspective view showing a state where the dust hood is removed from the electric circular saw. The electric circular saw 1 with a chip collection mechanism of this example has an electric round saw body 2 and a chip collection mechanism 3 for collecting the chips wound up from the electric circular saw body 2.

  The electric circular saw body 2 has the same configuration as that of a general hand-held type, and includes a main body case 21. The main body case 21 includes an electric motor 22, and a handle 23 is integrally formed. A circular saw blade 24 is coaxially fixed to a rotating shaft (not shown) of the electric motor 22. The left side portion of the circular saw blade 24 is covered with a left side plate portion 25 a of a saw blade cover 25 attached to the main body case 21. The upper half outer peripheral portion of the circular saw blade 24 is covered with an arc-shaped cover portion 25 b having a U-shaped cross section of the saw blade cover 25. The lower portion of the circular saw blade 24 protrudes downward from an opening of a rectangular frame-shaped base 26 attached to the main body case 21, and the depth of cut of the circular saw blade 24 is regulated by the frame-shaped base 26. . Reinforcing ribs 26 a and 26 b that are bent upward at a right angle are formed on both side edges of the frame-like case 26.

  The chip collection mechanism 3 includes a sealing member 4 that seals the front end portion of the saw blade cover 25, and a dust cover 5 that covers a front portion above the frame-shaped base 26 on the right side surface of the circular saw blade 24. ing.

  The sealing member 4 is obtained by filling the front portion of the saw blade cover 25 with a soft material having shape retention. In this example, paper clay is used as the soft material. Of course, other than that, for example, a resin or the like can be used. In this example, paper clay is packed in the front end portion 25 c of the cover portion 25 b of the U-shaped cross section of the saw blade cover 25. As shown in FIG. 1B, the paper clay is deformed into a shape that allows only the circular saw blade 24 to pass through by being pushed by the circular saw blade 24, and the state is maintained. It becomes the sealing member 4 which sealed the front side part of the saw blade cover 25 as it is.

  The dust hood 5 is made of, for example, a transparent plastic plate, and has a horizontally long rectangular side plate portion 51, a fixed width rear plate portion 52 bent at a right angle from the rear edge of the side plate portion 51, and the side plate portion 51. A fixed-width top plate portion 53 bent at a right angle from a rear portion at the upper edge of the upper edge of the upper plate and a fixed-width bottom plate portion 54 bent at a right angle from the rear portion at the lower edge of the side plate portion 51 at a right angle. And. A thin magnet plate 55 is bonded and fixed to the back surface of the bottom plate portion 54. The top plate portion 53 is continuous with the upper edge of the side plate portion 51 and the rear plate portion 52.

  With reference to FIG. 3, the cutting operation | work using the electric circular saw 1 is demonstrated. In the cutting operation, the tip of the suction hose 6 of the cleaner 7 is fixed to the portion of the left side plate portion 25a of the circular saw blade cover 25 with the tip of the suction hose 6 facing the front end side portion of the circular saw blade 24, and the cleaner 7 is turned on. .

  The chips generated from the cutting position of the circular saw blade 24 are wound around the cover portion 25b of the saw blade cover 25 by the circular saw blade 24 and scattered backward from the rear end of the cover portion 25b. Further, it scatters around the front portion of the circular saw blade 24, particularly in the right direction. In this example, the cutting member 4 scrapes off the swarf caught from the circular saw blade 4 into the cover portion 25b of the saw blade cover 25 by the sealing member 4 and falls onto the frame-like base 26 inside the dust hood 5, It collects in. Further, the chips scattered rightward from the front side portion of the circular saw blade 24 are accumulated inside the dust hood 5 without being scattered around by the dust hood 5 covering the same. Since the tip of the suction hose 6 is directed to the inner portion of the dust hood 5, the accumulated chips are sucked from the suction hose 6 to the cleaner 7 and collected.

  When the amount of chips generated is small, the cutting operation is performed in the state shown in FIG. 1A without attaching a suction hose. Most of the generated chips accumulate inside the dust hood 5 and do not scatter around. After the cutting operation is completed, the dust hood 5 may be removed from the frame-shaped base 26 and the accumulated chips may be disposed of.

(Chip collection kit)
Next, the component parts of the chip collection mechanism 3 having the above-described configuration can be prepared as a chip collection kit and used by attaching to an existing electric circular saw. The chip collection kit includes a filling material such as paper clay used as the sealing member 4 and the dust hood 5. Further, a suction hose 27 for attaching to the saw blade cover 25 may be included.

  If the kit of this structure is used, the existing electric round saw can be easily provided with a chip collection function, which is very convenient.

(a) And (b) is the perspective view of the electric circular saw with a chip collection mechanism to which this invention is applied, and the fragmentary sectional view of the front-end part of a saw blade cover. It is a perspective view in the state where the dust hood of the electric circular saw with a chip collection mechanism shown in Drawing 1 was removed. It is explanatory drawing which shows the state at the time of the cutting | disconnection operation | work of the electric circular saw with a chip collection | recovery mechanism.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric round saw with a chip collection | recovery mechanism 2 Electric round saw main body 21 Main body case 22 Electric motor 23 Handle 24 Circular saw blade 25 Saw blade cover 25a Left side plate part 25b Cover part 25c of U-shaped cross section Front end part of cover part 25b 26 Frame-shaped base 3 Chip collection mechanism 4 Sealing member 5 Dust hood 51 Side plate portion 52 Rear plate portion 53 Top plate portion 54 Bottom plate portion 55 Magnet 6 Suction hose 7 Cleaner

Claims (13)

A sealing member is attached to the front end portion of the saw blade cover having a U-shaped cross-section covering the upper half outer peripheral portion of the circular saw blade of the electric circular saw, and only the blade tip portion of the circular saw blade can pass through the front end portion. Blockade in state,
By scraping off the chips, which are wound into the saw blade cover by the circular saw blade from the cutting position of the cutting object, from the circular saw blade by the blocking member,
A method for collecting chips of an electric circular saw, characterized by preventing generation of chips that are wound around the saw blade cover by the circular saw blade and scattered backward from a rear end portion of the saw blade cover. In claim 1,
The method for collecting chips of an electric circular saw, wherein the sealing member is a soft material having a shape retaining property filled in a front end portion of the saw cover. In claim 2,
The method for collecting chips of an electric circular saw, wherein the soft material is paper clay. In any one of claims 1 to 3,
Cover the front side portion of the right side surface of the circular saw blade with a dust hood,
A method for collecting chips of an electric circular saw, characterized by preventing generation of chips scattered from the right side of the circular saw blade to the outer periphery. In claim 4,
A method for collecting chips of an electric circular saw, wherein the chips collected inside the dust hood are sucked through a suction hose attached to a left portion of the front portion of the saw blade cover. A circular saw blade,
A saw blade cover having a U-shaped cross section covering the upper half of the circular saw blade;
A frame-like base that regulates the cutting depth by the circular saw blade;
A sealing member that seals the front end portion of the cover portion of the saw blade cover so that only the circular saw blade can pass through;
An electric circular saw with a chip collecting mechanism, comprising: a dust hood covering a front side portion of the right side surface of the circular saw blade above the frame-shaped base. In claim 6,
The electric circular saw with a chip collection mechanism, wherein the sealing member is a soft material having shape retention filled in a front end portion of the cover portion of the saw cover. In claim 7,
An electric circular saw with a chip recovery mechanism, wherein the soft material is paper clay. In claim 6,
An electric circular saw with a chip collection mechanism, comprising a suction hose for sucking and collecting the chips collected inside the dust hood. In claim 6,
The dust hood is attached to the frame-like base so as to be detachable by magnetic force. A saw blade cover having a circular saw blade, a cover portion having a U-shaped cross-section covering the upper half outer peripheral portion of the circular saw blade, and a frame-shaped base that regulates a cutting depth by the circular saw blade A chip collection kit used by attaching to an electric circular saw equipped with
Filling the front end portion of the cover portion of the saw blade cover, and using a soft filler having a shape retaining property to seal the front end portion so that only the circular saw blade can pass through;
An electric circular saw characterized by having a dust hood that can be attached to the frame-shaped base so as to cover a front side portion of the right side surface of the circular saw blade above the frame-shaped base. Swarf recovery kit. In claim 11,
The dust hood can be attached to and detached from the front side portion of the frame-shaped base by a magnetic force. In claim 11 or 12,
An electric round saw chip collection kit having a suction hose for sucking and collecting chips collected inside the dust hood.

Images