JP3183005U - Handheld electric saw - Google Patents

Abstract

A novel hand-held electric saw having a saw blade body dedicated to wall drilling is provided.
An elongate tool body 1 having a motor built-in and having a drive output section 11 reciprocating toward the tip side, a mounting section mounted on the drive output section 11 and a saw having a sawtooth section for cutting. In a hand-held electric saw composed of a blade body, the saw blade body 2 is short so that the lateral runout at the tip of the saw blade body does not affect the cutting operation during reciprocating drive, and can be easily cut into the wall surface. In addition, a sawtooth portion is formed only on a short arc-shaped edge inclined downward from the reciprocating drive direction, and the sawtooth portion of the short arc-shaped edge cuts through the wall plate A quickly and further cuts through, thereby penetrating the wall plate A. Then, a hole having a desired size is formed in the wall plate A.
[Selection] Figure 3

Description

  The present invention relates to a hand-held electric saw having a saw blade mounted on a drive body called a reciprocating saw.

  The reciprocating saw includes a motor, has a mechanism for converting rotational motion into reciprocating motion, and is configured by mounting a saw blade body at a reciprocating motion output location. In particular, in a saw blade body, in order to directly perforate a wall surface, a saw blade having a curved shape is known. For example, Patent Document 1 (Japanese Patent Laid-Open No. 9-234624) discloses a saw blade body of a power saw provided with a saw blade with the tip of the double-edged saw as the sword tip bulging width. Moreover, in patent document 2 (Unexamined-Japanese-Patent No. 2011-73175), the blade edge of the front end side is curved to the peak side, and the saw blade is formed in the curved edge.

JP-A-9-234624. JP2011-73175A.

  To drill directly on the wall surface with a reciprocating saw equipped with the above-mentioned known saw blade body, the saw blade body is driven by contacting the curved blade edge to the surface of the wall surface, and a cut is made in the wall surface. In this case, a rectangular through-hole is formed in the wall surface by cutting with a straight saw blade after penetrating.

  However, the known saw blade body adopts an elongated saw blade body in consideration of ordinary saw cutting, and a saw blade for wall surface cutting is formed at the tip, but the saw blade body is driven reciprocally. The tip of the saw blade becomes more slender as the saw blade body becomes narrower, and when the first cut is made in contact with the wall surface, the cut becomes wider due to the swing of the saw blade body. In addition, beautiful wall drilling is not performed.

  Therefore, the present invention proposes a new hand-held electric saw equipped with a saw blade body dedicated to wall drilling.

  A hand-held electric saw according to the present invention includes an elongated tool main body with a built-in motor and a drive output portion that reciprocates toward the tip, a mounting portion attached to the drive output portion, and a saw blade portion for cutting. The saw blade portion of the saw blade body is formed only on a short arc-shaped edge inclined downward from the reciprocating drive direction.

  Thus, when the saw blade portion of the saw blade body holding the tool body and reciprocating is brought into contact with the wall plate surface to be drilled, the saw blade body is short and the vibration in the front and back direction is very small. The serrated edge of the short arc edge cuts the wallboard and bites in quickly. By further cutting, the wall plate is penetrated, and after the penetration, the saw blade body is cut in a penetrating state to form a predetermined groove in the wall plate. When this is performed on four sides, the wall plate has a desired size. A hole can be formed.

  In addition, the hand-held electric saw according to the present invention (Claim 2) is provided with a guard body disposed on the outer periphery of the base of the mounted saw blade body, particularly at the drive output portion of the tool body, and the guard body is applied to the wall surface. When the tool main body is rotated with the contact portion as a fulcrum, the sawtooth portion is provided at a short arc-shaped edge that can penetrate into the wall surface from a position where it contacts the wall surface.

  Thus, when the tool body is attached to the wall surface and the guard body is used as a fulcrum and the tail of the tool body is lifted, the sawtooth portion comes into contact with the wall plate surface and cutting starts. The body penetrates the wall plate and can perforate the wall surface with a stable operation.

  The configuration of the present invention is as described above, and by adopting a short saw blade body, the left and right runout of the saw blade body during reciprocating drive is remarkably reduced, and an accurate and clean groove can be easily formed. This makes drilling work easier.

The front view of the saw blade body of the embodiment of the present invention. The front view of the whole. Explanatory drawing of the same use state.

  Next, an embodiment of the present invention will be described. The hand-held electric saw shown in the embodiment includes a tool body 1 and a saw blade body 2.

  The tool body 1 has an existing elongated shape, and has a built-in motor and is provided with a drive output unit 11 that reciprocates to attach a saw blade body 2 at the tip, and the drive output unit 11 includes a guard body. 12 is attached. The guard body 12 is attached so as to be positioned on the outer periphery (four rounds) of the base (mounting portion) 21 of the mounted saw blade body 2 and is provided in the existing tool body 1.

  The saw blade body 2 includes a mounting portion 21 whose base portion can be mounted on the drive output portion 11 of the tool body 1 and a sawtooth portion 22 having a sawtooth. In particular, the sawtooth portion 22 has a reciprocating drive direction. It is formed in a short arc-shaped edge inclined downward from the bottom, and the short wall plate A cannot be cut through, and if it is long, the lateral vibration of the tip becomes large, so that the sawtooth portion length L is set to 35 to 50 mm, Moreover, the arc radii R are in the range of 120mm ± 10% and the center tangent of the short arc edge is reciprocated so that the arcuate dentition can cut from the wall surface and the cutting after the penetration can be performed efficiently. The downward tilt angle θ from the driving direction is set to 15 to 30 degrees.

  Thus, when the saw blade body 2 is mounted on the drive output unit 11 of the tool body 1 and the tool body 1 is operated, the saw blade body 2 performs a back-and-forth reciprocating motion, causing the tool body 1 to follow the wall surface A and guarding. When the tail of the tool body 1 is lifted with the body 12 as a fulcrum, the sawtooth portion 22 comes into contact with the surface of the wall plate A, and the wall plate A is cut.

  In particular, since the saw blade body 2 is sufficiently short at the start of cutting, the vibration in the front and back directions is very small, and the saw tooth portion 22 quickly bites into the surface of the wall plate A and starts cutting.

  When the tool body is further rotated with the contact portion of the guard body 12 as a fulcrum, the sawtooth portion 22 gradually cuts from the position where it contacts the surface of the wall plate A until it penetrates the wall plate A and penetrates. After that, the cutting of the wall plate is carried out in the penetrating state to form a kerf on one side.

  When the kerfs are formed on four sides, a hole having a desired size is formed in the wall plate A.

  In the above-described embodiment, an example in which the existing tool body 1 provided with the guard body 12 is used has been described. However, since the shape of the guard body 12 also differs depending on the manufacturer, the guard body 12 is not necessarily used. May not be a fulcrum of the cutting operation, and a tool body that does not include the guard body 12 may be employed.

DESCRIPTION OF SYMBOLS 1 Tool main body 11 Drive output part 12 Guard body 2 Saw blade body 21 Mounting part 22 Sawtooth part

Claims (4)

  It is composed of an elongated tool body having a built-in motor and a drive output section that reciprocates at the tip, and a saw blade body having a mounting section and a saw blade section for cutting mounted on the drive output section, The saw-toothed portion of the saw blade body is formed only on a short arc-shaped edge inclined downward from the reciprocating drive direction.   When a guard body arranged on the outer periphery of the base of the mounted saw blade body is attached to the drive output section of the tool body, the guard body is brought into contact with the wall surface, and the tool body is rotated with the contact portion as a fulcrum The hand-held electric saw according to claim 1, wherein the sawtooth portion is provided on a short arc-shaped edge that can penetrate into the wall surface from a position where it comes into contact with the wall surface.   The hand-held electric saw according to claim 1 or 2, wherein the length of the sawtooth portion is 35 to 50 mm and the arc shape R is formed in a range of 120 mm ± 10%.   The hand-held electric saw according to any one of claims 1 to 3, wherein the center tangent of the short arc-shaped edge is inclined downward by about 15 to 30 degrees from the reciprocating drive direction.

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