JPH0642102U - Cutting tool - Google Patents

Abstract

(57) [Summary] [Purpose] To cut the material without scratches or stains. [Structure] A housing containing a drive mechanism, a base 5 attached to the housing, and a blade 2 protruding from a blade hole 19 of the base 5 are provided. Then, the material to be cut is cut by the blade 2 that is reciprocally driven while moving the base 5 along the surface of the material to be cut. In this case, the base 5 is formed by providing a sliding contact portion 23 made of synthetic resin on the lower surface of the metal substrate 22.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cutting tool for cutting construction materials such as plywood and gypsum board, and more particularly to a cutting tool for cutting with a reciprocating blade while moving a base along the surface of a material to be cut. Is.

[0002]

[Prior art]

 Conventionally, as a cutting tool of this type, a jig such as a jigsaw that simply reciprocates a saw blade, or a tool such as a saw blade or a knife blade such as that disclosed in Japanese Utility Model Publication No. 1-26402 is used. There is one that reciprocates back and forth and reciprocates up and down. Since these are structures in which the base is slidably contacted along the surface of the material to be cut and are cut by the blade, the blade is projected from the blade hole of the base below the base. These bases have a function of stably supporting a material to be cut and a tool by receiving a cutting reaction force when cutting.

[0003]

[Problems to be solved by the device]

 By the way, the base used in this type of cutting tool is a steel plate or the like that has been subjected to surface treatment such as plating. However, when cutting a gypsum board made of a material that polishes metal such as gypsum using this base (gypsum is harder than metal in terms of hardness), the base is polished on the surface of the material to be cut. The resulting metal powder adhered as traces, which was a problem in appearance.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a cutting tool that can cut a material to be cut without causing scratches or dirt.

[0005]

[Means for Solving the Problems]

 To achieve the above object, the cutting tool of the present invention comprises a housing 6 accommodating a drive mechanism, a base 5 attached to the housing 6, and a blade 2 protruding from a blade hole 19 of the base 5. In a cutting tool that cuts the material to be cut 4 with a blade 2 that is reciprocally driven while moving along the surface of the material to be cut 4, the base 5 has a sliding contact portion made of synthetic resin on the lower surface of the metal substrate 22. 23 is provided and formed.

It is also preferable that a curved surface portion 24 is formed at the tip portion of the base 5 so that the sliding contact portion 23 made of synthetic resin rises from the lower surface toward the surface.

[0007]

[Action]

 According to the above configuration, the slidable contact portion 23 made of a synthetic resin molded product is slidably contacted with the surface of the material 4 to be cut, and the material 2 to be cut can be cut by the blade 2. At this time, since the sliding contact portion 23 of the synthetic resin is in sliding contact with the material 4 to be cut, there is no fear that the material 4 to be cut will be scratched.

[0008]

【Example】

 As shown in FIGS. 5 and 6, the housing 6 to which the base 5 is attached includes a grip portion 7 that is inclined with respect to the base 5 and a motor housing portion 8 that extends parallel to the base 5. . A battery pack 20 is detachably attached to an end of the grip portion 7, and a power switch (trigger switch) 9 is provided at an intersection of the grip portion 7 and the motor housing portion 8.

A rotating shaft 10 is installed between both side walls of the housing 6 as shown in FIG. 7, and shaft supporting portions 10 a and 10 b at both ends of the rotating shaft 10 are rotatably supported by the housing 6. It A driven gear 11 is integrally mounted on the rotary shaft 10, and a drive gear 12 connected to a prime mover such as a motor is meshed with the driven gear 11. The drive gear 12 drives the rotary shaft 10 to rotate. It is supposed to be done. The rotating shaft 10 is provided with an eccentric cam 13 which is eccentric to the axis of the rotating shaft 10 by a predetermined amount, and the eccentric cam 13 is rotatable in an engagement hole 14 provided at the base end of the drive arm 1. The drive arm 1 can be driven by the eccentric cam 13. A long hole 15 which is long in the vertical direction is provided in an intermediate portion between the base end and the tip of the drive arm 1, and a blade 2 is attached to the tip of the drive arm 1. A swing fulcrum 16 is provided on the housing 6 at a position corresponding to the elongated hole 15 of the drive arm 1, and the swing fulcrum 16 is inserted into the elongated hole 15 of the drive arm 1. The blade 2 is formed in a rectangular plate shape that is long in the vertical direction, and the cutting blade portion 3 is provided in the vertical direction in the shape of a saw blade. The cutting edge portion 3 is composed of a cutting edge portion 3a at the front edge, a cutting edge portion 3b at the rear edge, and a cutting edge portion 3c having an arcuate edge at the lower end in the traveling direction of the blade 2. The blade 2 is attached by holding the blade 2 between the tip of the drive arm 1 and the pressing plate 17 and fastening a tightening screw 18. The tip of the drive arm 1 projects from the housing 6, the blade 2 is inserted into the blade hole 19 of the base 5, and the blade 2 is projected to the lower surface of the base 5.

As shown in FIGS. 1 and 2, the base 5 is formed by integrally forming a sliding contact portion 23 of synthetic resin on the lower surface side of a metal substrate 22 made of a steel plate or the like. The sliding contact portion 23 is a molded product of synthetic resin, and in order to integrate the sliding contact portion 23 with the metal substrate 22, the sliding contact portion 23 is attached by an adhesive or screwed with a screw 30. The metal substrate 22 of the base 5 plays a role of reinforcing the entire base 5, and the sliding contact portion 23 of synthetic resin plays a role of sliding contact with the material 4 to be cut. The base 5 is provided with a mounting hole 25. The mounting hole 25 is aligned with the screw hole 26 at the lower end of the housing 6 as shown in FIG. 3, and the mounting screw 27 is screwed into the screw hole 26 from the mounting hole 25. Installed. A slit-shaped blade hole 19 is bored in the base 5 on the center line of the base 5, and a chip discharge hole 28 wider than the blade hole 19 is formed in front of the blade hole 19 so as to be continuous with the blade hole 19. Has been set up. The blade 2 is passed through the blade hole 19, and the blade 2 is projected to the lower surface side of the base 5. Around the blade hole 19, there is provided a taper portion 29 which is inclined at an angle of θ so that the width becomes narrower downward. By having the taper portion 29, the blade 2 and the scoring line can be easily seen, workability is improved, and appropriate cutting work can be performed. A curved surface portion 24 which is a curved surface from the lower surface to the upper surface is provided at the front end portion of the base 5. A notch 31 is provided at the front and rear ends of the base 5 so as to be located on the center line corresponding to the position of the blade 2, and the score line 31 and the position of the blade 2 drawn on the material 4 to be cut by this notch 31. Can be adjusted. Moreover, since the blade 2 swings back and forth and reciprocates up and down to cut, the width of the cut is larger than the width of the blade 2. Therefore, a mark 21 indicating the range of the cutting width is provided on the base 5. In the case of this embodiment, as the mark 21, a notch 21a having the same width as the cut width is provided at the side edge of the base 3.

When the rotating shaft 10 is rotated, the drive arm 1 is driven by the eccentric cam 13 so as to perform an oscillating motion with the oscillating fulcrum 16 as a fulcrum, and the blade 2 moves back and forth together with the drive arm 1. The blade 2 is reciprocated in the longitudinal direction (vertical direction) of the blade 2, and the base 5 is slidably brought into contact with the surface of the material 4 to be moved, whereby the material 4 is cut by the blade 2. By driving the blade 2 in this manner, the blade edge of the blade 2 moves as shown by the arrow in FIG. 8 to swing back and forth and reciprocate vertically. Here, X is the amount of upward and downward movement, and Y is the amount of reciprocal movement back and forth. When cutting with a cutting tool, the base 5 is moved along the surface of the object to be cut 4 and is moved forward to be cut forward by the cutting edge portion 3a on the front side of the tool 2, and when moved rearward, the rear of the tool 2 is cut. It is designed to be cut by the side cutting edge portion 3b. At this time, since the sliding contact portion 23 of the synthetic resin of the base 5 is in sliding contact with the material 4 to be cut, the surface of the material 4 to be cut is not scratched. When the lower hole is cut into the material to be cut 1 without making a hole, the curved surface portion 24 at the front end of the base 5 is brought into contact with the material to be cut 4 as shown in FIG. A force is applied as indicated by the arrow, and the cutting blade portion 3c at the lower end of the blade 2 mainly cuts the blade 2 to penetrate the workpiece 4. At this time, since the curved surface portion 24 is brought into contact with the material 4 to be cut and used as a fulcrum, an accurate cutting operation can be performed.

[0012]

[Effect of device]

 According to the present invention, as described above, the base is formed by providing the sliding contact portion made of synthetic resin on the lower surface of the metal substrate, so that the sliding contact portion of the synthetic resin is slidably contacted with the surface of the material to be cut to transfer the base. It can be cut with a blade by moving, it does not scratch or stain the material to be cut, and it has a sufficient strength as the base uses a metal substrate as the core material. It is a thing.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of an embodiment of the present invention.

FIG. 2 (a) is a perspective view of the above base, and FIG. 2 (b) is a sectional view taken along line AA of FIG.

FIG. 3 is a perspective view illustrating a state in which the above base is attached.

FIG. 4 is a plan view showing a blade hole of the above base.

FIG. 5 is a perspective view showing the whole of the above.

FIG. 6 is a partially cutaway front view of the same as above.

FIG. 7 is an exploded perspective view showing the drive mechanism of the above.

FIG. 8 is an explanatory diagram illustrating an operation of the same cutting tool.

FIG. 9 is an explanatory diagram illustrating a state in which the lower hole is cut without opening.

[Explanation of symbols]

 2 blade 4 cutting material 5 base 6 housing 19 blade hole 22 metal substrate 23 sliding contact portion 24 curved surface portion

Claims (2)

[Scope of utility model registration request] 1. A housing that houses a drive mechanism, a base attached to the housing, and a blade protruding from a blade hole of the base, and reciprocating while moving the base along the surface of the material to be cut. A cutting tool for cutting a material to be cut with a cutting tool, wherein the base is formed by providing a sliding contact portion made of synthetic resin on a lower surface of a metal substrate. 2. The cutting tool according to claim 1, wherein a curved surface portion is formed so that a sliding contact portion made of synthetic resin rises from the lower surface toward the surface at the tip portion of the base.