JP2016140933A - Manual press-cutting tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting tool capable of cutting a workpiece into a desired size with a clear cutting surface without any noise problem of an electric motor generated during the cutting of an interior building material on a construction site.SOLUTION: The manual press-cutting tool A includes a mounting frame 1 on which a workpiece 3 is mounted, and a movable blade 4 swingably fitted to a fulcrum shaft 2 provided at one end of the mounting frame 1 to press-cut the workpiece 3. The mounting frame 1 has a groove 1d into which the movable blade 4 enters to press-cut the workpiece 3 during cutting. The cutting blade 4 includes a saw blade 5 for press-cutting the workpiece 3, and a knife-edge cutting blade 6 having a smooth tip 6a. The cutting blade 6 is fitted to at least one side of the saw blade 5 by projecting the tip 5e of the saw blade 5 closer to the mounting frame 1 side than the tip 6e of the cutting blade 6.SELECTED DRAWING: Figure 1

Description

The present invention relates to a manual press-cutting tool for cutting building materials and the like.

  At the construction site of interior building materials, construction is performed by cutting and adjusting a part of the floor material according to the shape and dimensions of the construction site, such as ceiling panels, wall materials, and floor materials. At that time, conventionally, a circular saw equipped with an electric motor has been generally used, and interior building materials can be easily cut at a construction site. However, in a circular saw equipped with an electric motor, the noise of driving to the motor may cause a noise problem to neighboring dwellings (especially in an apartment renovation site).

  In order to solve such a noise problem, there is no need to use an electric motor, and if there is a manual push-cutting tool that pushes a member to be cut with two blades between them, it is solved. There exists a tool like patent document 1 as such a manual push-cutting tool.

Japanese Patent No. 3764934

  However, since the manual press-cutting tool described in Patent Document 1 is a thin metal roof material, the cutting point of the mounting frame that contacts the lower surface of the metal roof material and the movable that contacts the upper surface of the metal roof material Since the cutting point of the blade is close, it can be pushed between the two, but if you try to cut a thick interior material, the cutting point of the mounting frame that touches the lower surface of the interior material and the interior material Since the cutting point of the movable blade in contact with the upper surface is separated, even if it is sandwiched between the two and pushed, the member to be cut is twisted (distorted), and the movable blade is deflected in the direction of moving away (moving away) from the mounting frame. As a result, even if it can be cut, there is a problem that the cutting surface becomes rough, or the cutting plane is greatly disengaged from the cutting line. In Oshikiri cutting tool blade structure it could not cut the interior material with a thickness.

  The present invention was made to solve such a technical problem, and the present invention provides a press cutting tool that can easily and cleanly cut an interior material, which is a thick member to be cut, manually. There is.

The press-cutting tool A according to claim 1 is swingably attached to a mounting frame 1 for mounting the member 3 to be cut and a fulcrum shaft 2 provided at one end of the mounting frame 1. 3 and a movable blade 4 that pushes through 3,
The mounting frame 1 is provided with a groove 1d into which the movable blade 4 enters and the member to be cut 3 is pushed at the time of cutting,
The movable blade 4 is composed of a saw blade 5 that pushes through the member 3 to be cut, and a cutting blade 6 having a knife edge shape with a smooth cutting edge 6a.
The cutting blade 6 is attached to at least one side surface of the saw blade 5 such that the cutting edge 5e of the saw blade 5 protrudes toward the mounting frame 1 from the cutting edge 6e of the cutting blade 6.

  The press cutting tool A has a case where the cutting blade 6 is attached to one side of the saw blade 5 as shown in FIG. 3 and a case where it is attached to both sides as shown in FIG. In any case, the cutting edge 5e of the saw blade 5 protrudes toward the mounting frame 1 from the cutting edge 6e of the cutting blade 6. First, the member 3 to be cut is roughly cut by the saw blade 5 and then cut to be cut. The rough cut surface of the member 3 is cut so as to be sharpened with a smooth knife-edge-shaped cutting blade 6.

  In a second aspect of the present invention, when the cutting blade 6 is attached to one side of the saw blade 5, the through-hole 7 a is formed in the blade body 5 t of the saw blade 5 along the cutting edge 6 e of the cutting blade 6. (FIG. 3A).

  When the cutting blades 6 are mounted on both surfaces of the saw blade 5 according to the first aspect of the present invention, the through-hole 7a is formed in the blade body 5t of the saw blade 5 along the cutting edge 6e. And the communicating hole 8 connected to this through-hole 7a is each drilled in the blade 6t of the cutting blade 6. It is characterized by the above-mentioned.

  A fourth aspect of the present invention is characterized in that, in the first aspect, a through-hole 7b extending from the cutting edge 6e of the cutting blade 6 to the back 6s of the cutting blade 6 is formed in the mating surface of the cutting blade 6 and the saw blade 5. To do.

  By providing such through-holes 7a and 7b and the communication hole 8, chips of the member to be cut 3 are smoothly removed from the mating surface of the cutting blade 6 and the saw blade 5, and this portion is clogged and cut. There is no hindrance.

  According to the present invention, since an electric motor is not used, a thick member to be cut such as a ceiling panel, a wall material, or a floor material is accurately and cleanly cut at a construction site along a cutting line without causing a noise problem. be able to.

(A) is a perspective view of 1st Example of the cutting tool of this invention, (b) is a principal part perspective view of 2nd Example. It is a side view of the movable blade provided with the cutting blade on one side of the saw blade of the present invention. (A) (b) It is a schematic sectional drawing just before a movable blade provided with the cutting blade on one side of the saw blade of the present invention starts cutting the member to be cut. It is a schematic sectional drawing immediately after the movable blade provided with the cutting blade on one side of the saw blade of the present invention started cutting the member to be cut. It is a schematic sectional drawing immediately after the movable blade provided with the cutting blade on one side of the saw blade of the present invention has finished cutting the member to be cut. (A) (b) It is a schematic sectional drawing just before the movable blade provided with the cutting blade on both surfaces of the saw blade of this invention starts the cutting | disconnection of a to-be-cut member. It is a schematic sectional drawing immediately after the movable blade which provided the cutting blade on both surfaces of the saw blade of this invention started the cutting | disconnection of a to-be-cut member. It is a schematic sectional drawing immediately after the movable blade provided with the cutting blade on both surfaces of the saw blade of the present invention has finished cutting the member to be cut.

  The present invention will be described below with reference to the drawings. Fig.1 (a) (b) is a perspective view of the cutting tool which shows embodiment of this invention. The manual press-cutting tool A includes a mounting frame 1 and a movable blade 4. As a first embodiment, an example in which the movable blade 4 is a saw blade 5 and a cutting blade 6 is attached to one surface thereof will be described with reference to FIGS.

  The mounting frame 1 is composed of a pair of long plate-like members 1a extending in the horizontal direction and provided with a groove 1d into which the movable blade 4 is inserted, and a pair of front and rear stand legs 1b near both ends thereof. The long plate-like member 1a is supported in a state of being erected in the plate width direction. And the support part 1c is standingly arranged by the upper surface of the end of the plate-shaped member 1a, and the fulcrum shaft 2 is constructed.

  As shown in FIG. 2, the movable blade 4 has a half-moon shape in which a portion of the lower edge is formed in a convex arc shape, and a blade 5a is formed over the entire length of the lower edge. The shape of the blade 5a is “Edo eyes” for vertical cutting in the present embodiment, but the shape of the blades 5a is not limited to this. It may be. Since the direction of the eye is a push-cut, it is formed toward the fulcrum shaft 2 side.

  Then, an arc is drawn concentrically with the lower side of the convex arc shape on both surfaces of the blade 5t of the saw blade 5 (not shown, but if the cutting blade 6 is mounted on only one side, only the mounting surface side may be used). The portion from the arc to the lower side is cut off in a step shape, and a cutting blade 6 described later is attached. This portion is referred to as a cutting blade mounting portion 5c. A plurality of arc-shaped through holes 7a are formed in the cutting blade mounting portion 5c along the lower blade 5a. A through hole 5h for inserting the fulcrum shaft 2 is formed in the tip portion 5d of the saw blade 5, a neck 5b is projected from the rear end of the saw blade 5, and the operation lever 9 is connected to the neck 5b. It is attached to. The attachment of the cutting blade 6 to the saw blade 5 is sufficient as long as it can withstand the force applied to the cutting blade 6 during cutting, and is not limited to an arc shape. A straight line parallel to the back of the saw blade 5 may be used. The fixing between the two is not limited, but it may be fixed with, for example, a countersunk screw.

The cutting blade 6 is provided in a downward concentric arc shape so that the cutting edge 6 e is along the cutting edge 5 e of the saw blade 5. The blade edge 6e is a smooth single blade like a sashimi knife over its entire length, the vertical surface is provided on the mounting frame 1 side, and the inclined portion 6b of the blade 6a is provided on the saw blade 5 side. (In the present embodiment, the cutting blade 6 is an example of a single blade, but of course, a double blade such as a Western knife may be used. The cutting surface is more beautiful with the single blade being cut vertically.)
In the first embodiment, since the cutting blade 6 is mounted on one side of the blade 5t of the saw blade 5, the side surface of the cutting blade 6 is fitted to the blade 6t in the cutting blade mounting portion 5c of the saw blade 5. The part from the center to the back is scraped into a stepped and arcuate shape. This portion is referred to as a fitting portion 6c. The through-hole 7a of the saw blade 5 is formed along the inner side of the cutting edge 6e of the cutting blade 6 at a portion of the blade 5t that avoids the blade 5a of the saw blade 5.

  A through hole 5h for passing the fulcrum shaft 2 is provided at one end of the movable blade 4 (in this embodiment, the saw blade 5 and the cutting blade 6 attached thereto). The cutting edge 6e of the cutting blade 6 provided on the side surface of the saw blade 5 is capable of cutting the rough cut surface of the member 3 cut roughly by the saw blade 5 so that the rough cutting surface can be scraped off. It is attached to the support portion 1c of the mounting frame 1 so as to be swingable. In the illustrated embodiment, the cutting edge 5 e of the saw blade 5 is provided so as to protrude from the cutting edge 6 e of the cutting blade 6 toward the mounting frame 1. An operation lever 9 is attached to the neck 5b of the saw blade 5 to enable manual pressing.

3A to 5, the workpiece 3 is cut with the cutting tool A according to the present invention in which the mounting frame 1, the cutting blade 6, the saw blade 5, and the blade 5 t are provided with through holes 7 a. The operation effect at the time is explained using schematic sectional views of the mounting frame 1, the saw blade 5, the cutting blade 6, and the member to be cut 3 immediately before cutting, during cutting, and after cutting. The cutting edge 6e of the cutting blade 6 is adjusted to the exact position (the cutting line of the member 3 to be cut). In this state, the operation lever 9 is pushed down to cut the member 3 to be cut.

FIG. 3A shows a state immediately before cutting, and the cutting edge 5e of the saw blade 5 is about to contact the member 3 to be cut. In FIG. 4, since the cutting edge 5e of the saw blade 5 protrudes closer to the mounting frame 1 than the cutting edge 6e of the cutting blade 6, the cutting edge 5e of the saw blade 5 first bites into the surface portion of the member 3 to be cut. Although the portion is roughly cut, the cutting edge 6 e of the cutting blade 6 is not in contact with the member to be cut 3. Thereafter, the operation lever 9 is further pushed down, and the cutting edge 6e of the cutting blade 6 cuts into the member 3 to be cut, so that the portion that has been roughly cut by the saw blade 5 is scraped off.

FIG. 5 shows a state after cutting, and the movable blade 4 enters the groove 1 d of the mounting frame 1. Therefore, the member 3 to be cut is supported on the lower surface at a narrow interval on both sides of the movable blade 4, and the middle thereof is cut so that it does not bend. The cutting edge 6e of the cutting blade 6 cuts the cutting surface of the member 3 to be cut almost perpendicularly at the exact position and has a clean surface. However, the cutting edge 6 is cut off by the cutting edge 5e of the saw blade 5 at the portion cut off by the cutting blade 6. The cut surface is rough. Further, a fine cut piece is discharged out of the movable blade 4 by the through hole 7a of the blade 5t of the saw blade 5, and the movable blade 4 can be continuously cut without clogging the cut piece. In this way, it is possible to easily cut the thick member to be cut 3 with a stable pressing operation. The cutting of the member to be cut 3 having a width repeats the above operation over the entire width.

  In addition, although the said through-hole 7a showed the example provided in the blade 5t of the saw blade 5, as shown in FIG.3 (b), on the mating surface of the cutting blade 6 and the saw blade 5, the cutting blade 6 is provided. A through hole 7b extending from the blade 6a to the back 6s may be provided.

  Next, a second embodiment of the present invention will be described. In the second embodiment, in order to avoid complication, the same parts as those in the first embodiment are denoted by the same reference numerals, the description of the first embodiment is used and the description thereof is omitted, and mainly the parts different from the first embodiment. explain.

The second embodiment is a case where the cutting blades 6 of the movable blade 4 are mounted on both surfaces of the saw blade 5 as shown in FIGS. 6 to 8, the cutting tool of the present invention is provided with the mounting frame 1, the two cutting blades 6, and the cutting blade 6 having a communication hole 8 communicating with the through hole 7 a of the blade 5 t of the saw blade 5. The effects of cutting the member to be cut 3 will be described using schematic sectional views of the mounting frame 1, the saw blade 5, the cutting blade 6 and the member to be cut 3 immediately before, during and after cutting. . Here, the cutting edge 6e of one of the cutting blades 6 is adjusted to the position of the exact size (the cutting line of the member 3 to be cut).

FIG. 6A shows a state immediately before cutting, and the cutting edge 5e of the saw blade 5 is about to contact the member 3 to be cut. In FIG. 7, as shown in the first embodiment, the cutting edge 5e of the saw blade 5 protrudes closer to the mounting frame 1 than the cutting edges 6e of the cutting blades 6 on both sides. Bites into the member 3 to be cut. Subsequently, when the operation lever 9 is pushed down, the cutting edges 6e of the cutting blades 6 on both sides start to cut into the member 3 to be cut.

In this case, cutting of the member 3 to be cut is performed by the cutting blades 6 on both the left and right sides, the pressing operation is stabilized, and the member 3 to be cut can be easily cut. FIG. 8 shows a state after cutting. As in the first embodiment, the cutting edges 6e of the two cutting blades 6 cut off the cutting surface of the member 3 to be cut almost vertically to form a clean surface. The cut surface of the cut piece by the cutting edge 5e of the saw blade 5 cut off by the cutting blade 6 is rough. Not only is the cutting surface at the exact position of the member to be cut a substantially vertical and clean surface, but the other cutting surface is also a substantially vertical and clean surface, so the next cutting of the same member to be cut is possible. The work efficiency can be improved because the surface can be used as it is without finishing the work to make the surface almost vertical and clean. Further, fine cut pieces are discharged out of the movable blade 4 by the through-hole 7a of the blade 5t of the saw blade 5 and the communication hole 8 of the two cutting blades 6, and the movable blade 4 is continuous without clogging the cut pieces. Can be cut. The other points are the same as in the first embodiment.

A: Manual push cutting tool of the present invention, 1: mounting frame, 1a: plate member, 1b: stand leg, 1c: support, 1d: groove, 2: fulcrum shaft, 3: member to be cut, 4: Movable blade, 5: saw blade, 5a: saw blade, 5b: neck, 5c: cutting blade mounting portion, 5d: tip portion, 5e: blade edge of saw blade, 5h: through hole, 5t: blade of the saw blade , 6: Cutting blade, 6a: Cutting blade, 6b: Slope portion, 6c: Fitting portion, 6e: Cutting blade edge, 6t: Cutting blade blade, 6s: Cutting blade back, 7a, 7b: Through hole, 8: communication hole, 9: operation lever,

Claims (4)

In a press-cutting tool composed of a mounting frame for mounting a member to be cut, and a movable blade that is swingably attached to a fulcrum shaft provided at one end of the mounting frame and pushes the member to be cut.
The mounting frame is provided with a groove into which the movable blade enters and the member to be cut is pushed when cutting,
The movable blade is composed of a saw blade that pushes the member to be cut, and a knife edge-shaped cutting blade with a smooth cutting edge,
A manual press-cutting tool characterized in that a cutting blade is attached to at least one side surface of the saw blade such that the blade edge of the saw blade protrudes toward the mounting frame from the blade edge of the cutting blade.   The movable blade according to claim 1, wherein when the cutting blade is mounted on one side of the saw blade, a through hole is formed in the blade of the saw blade along the cutting edge of the cutting blade. Manual press cutting tool.   The movable blade according to claim 1, wherein when the cutting blade is mounted on both surfaces of the saw blade, a through hole is formed in the blade of the saw blade along the cutting edge of the cutting blade, and the through hole is formed in the through hole. A manual press-cutting tool characterized in that communicating holes are formed in each blade of the cutting blade.   The manual cutting tool according to claim 1, wherein a through-hole extending from the cutting edge of the cutting blade to the back of the cutting blade is formed in a mating surface of the cutting blade and the saw blade.