JP2004195566A - Cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To juxtapose a nozzle and a grip even in a narrow space. <P>SOLUTION: The front grip 16 is arranged on the front side of a body 2, and is integrally connected to a connecting arm 5 by screwing a screw 20 penetrating through a cutout 19 in the connecting arm 5 by fitting a projecting part 18 to a recessed groove 17 of the connecting arm 5. A grip part 21 is formed on the upper end of the front grip 16. While, a cylindrical nozzle part 22 composed of a dust collecting port 23 opening on the peripheral edge side of a saw blade 4 and a discharge port 24 communicating with the dust collecting port 23, is integrally formed on the lower end of the front grip 16. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cutting machine provided with a disc-shaped rotary blade driven by a motor on a main body such as a circular saw or a cutter mounted on a base.
[0002]
[Prior art]
A cutting machine such as a circular saw is provided with a disk-shaped rotary blade driven by a motor on a main body mounted on a base, and a handle provided on an upper side of the main body with the base mounted on a material to be cut. By gripping and sliding in the cutting direction, it becomes possible to cut the material to be cut by the rotary blade.
Further, in such a cutting machine, there is known a cutting machine in which a tubular nozzle is provided in a main body so that a hose of a dust collector or the like can be connected so that cutting waste generated at the time of cutting can be effectively collected. . For example, in Patent Literature 1, a dust collection port protrudes laterally in the blade case of the main body in front of the cutting direction, and in Patent Literature 2, similarly, a dust collection port protrudes vertically in front of the cutting direction of the blade case. ing.
On the other hand, in order to facilitate support at the time of cutting and improve operability, apart from the handle, there is also known a cutting machine in which a grip having an upper end as a grip portion is provided upright on a front side of a main body of a base (for example, (See Patent Document 3)
[0003]
[Patent Document 1]
JP-A-59-184611 [Patent Document 2]
JP-A-11-333623 [Patent Document 3]
JP-A-6-114804
[Problems to be solved by the invention]
As described above, both the nozzle and the grip are provided in front of the cutting direction of the main body, but in the case of a compact cutting machine such as a small circular saw or a cutter, it is space-saving to provide both the nozzle and the grip. It is impossible, and if the main body and the base are enlarged for these juxtapositions, the overall compactness is hindered. In addition, even if both are provided, the nozzle and hose may hinder grip grip, and conversely, the grip may hinder hose routing, resulting in poor usability and increased cost due to an increase in the number of parts. There is also. Therefore, after all, only one of them is selected and provided.
[0005]
Therefore, an object of the present invention is to provide a cutting machine that can easily install a nozzle and a grip in a narrow space without impairing the usability of each other.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is characterized in that a grip portion is rotated at an upper end on one of a base and a main body in a cutting direction front side of a main body, and mounted on a lower side of the grip portion. It is characterized in that front grips each having a cylindrical nozzle portion that opens at the periphery of the blade are attached.
According to the second aspect of the present invention, in addition to the object of the first aspect, a rotary blade is provided at an outer edge of the rotary blade at an opening of the nozzle portion of the front grip in order to perform good dust collection at the nozzle portion. And a guide piece protruding in a shape crossing the line.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a left side view of a marunoco, which is an example of a cutting machine, FIG. 2 is a right side view, and FIG. 3 is a plan view, and the marunoco 1 is a rear side of the main body 2 (the left side (cutting direction) in FIG. The same applies to the following.) A disc-shaped saw blade (rotary blade) 4 that rotates by the drive of a motor 3 provided on the base 6 is provided with a front end of a connecting arm 5 extending forward from the main body 2. It is rotatably mounted on the support plate 7. A guide plate 9 is provided upright on the base 6 on the rear end side of the main body 2 along the inner surface of the blade case 8 that covers above the saw blade 4. By fixing the saw blade 4 at an arbitrary position with the thumb screw 10, the protruding amount (cutting amount) of the saw blade 4 below the base 6 can be adjusted. The main body 2 is pivotally mounted on pins 11 and 12 so as to be tiltable. The angle of the saw blade 4 with respect to the base 6 can be adjusted by fixing the main body 2 at an arbitrary tilting position with a thumb screw 13 provided on the support plate 7. It has become. 14 is a handle formed above the main body 2, and 15 is a switch lever for driving the motor 3.
[0008]
A front grip 16 is provided on the front side of the main body 2. The front grip 16 is a molded product made of a synthetic resin that is long in the vertical direction. The front grip 16 has, on the left side thereof, a convex portion 18 that can be fitted into a concave groove 17 formed on the right side of the connecting arm 5 and protrudes therefrom. At the position, an inverted U-shaped notch 19 is formed, and a screw 20 penetrating the notch 19 is screwed into the connecting arm 5 with the convex portion 18 fitted in the concave groove 17 of the connecting arm 5. Thereby, the connecting arm 5 is integrally connected. A flat grip portion 21 is formed at the upper end of the front grip 16.
On the other hand, a cylindrical nozzle portion 22 is integrally formed at the lower end of the front grip 16. The nozzle portion 22 includes a dust collection port 23 that opens leftward at the periphery of the saw blade 4, and a discharge port 24 that communicates with the dust collection port 23 and opens slightly upward and obliquely right behind. The outer edge of the saw blade 4 at the dust collection port 23 protrudes to the left, crossing the saw blade 4, and crosses the saw blade 4 and the base 6 that rotate in the counterclockwise direction in FIG. Mouth) A guide piece 25 covering the upper part is formed.
[0009]
In the circular saw 1 configured as described above, when the front grip 16 is attached to a predetermined position of the connecting arm 5 using the convex portion 18 and the screw 20, the grip portion 21 is positioned at an appropriate position above the front side of the main body 2. The nozzle portions 22 are fixed at appropriate positions near the saw blade 4, respectively. Therefore, at the time of cutting, the operator places the base 6 on the material to be cut, grips the handle 14 with the right hand, grips the grip portion 21 with the left hand, and slides in the cutting direction while supporting the circular saw 1. Thus, cutting by the saw blade 4 can be performed.
If a hose such as a dust collector is connected to the discharge port 24 of the nozzle portion 22 at the time of this cutting, the cutting chips generated upward from the material to be cut along the tangential direction of the saw blade 4 can be used as they are. Either the dust is directly sucked into the dust collection port 23 or the suction is made into the dust collection port 23 after coming into contact with the guide piece 25, and the dust is collected by the nozzle portion 22 and is collected by the dust collector through the hose.
[0010]
As described above, according to the circular saw 1 of the above embodiment, the front grip 16 having the grip portion 21 at the upper end and the nozzle portion 22 at the lower end is employed, so that the grip and the nozzle can be easily installed in a narrow space. And a rational configuration with a small number of parts is obtained. In addition, since the grip portion 21 is located at the upper end and the nozzle portion 22 is located at the lower end, the hose connected to the nozzle portion 22 hinders gripping of the grip portion 21, and conversely, the grip portion 21 can be used to route the hose. It does not get in the way. Therefore, both the function of supporting the circular saw 1 and the function of collecting dust can be suitably used without impairing operability and workability.
Further, since the guide piece 25 protruding in a shape that crosses the saw blade 4 is provided at the outer edge of the saw blade 4 at the dust collection port 23 of the nozzle portion 22 of the front grip 16, cutting debris is removed by the guide piece 25. The dust can be effectively guided to the dust collection port 23 and the dust can be satisfactorily collected at the nozzle portion 22.
[0011]
In the above embodiment, the front grip 16 is provided on the connecting arm 5 on the main body 2 side, but may be provided on the base 6. When provided on the base, the position of the grip portion with respect to the base becomes constant, so that the operability of the grip portion can be maintained regardless of a change in the cut amount. Conversely, when provided on the main body side as in the above embodiment, the nozzle portion can follow the tilting of the main body and the like, and the dust collecting port is always opened near the periphery of the saw blade, so that the dust collecting effect is not reduced. is there.
In addition, the mounting structure of the front grip is not limited to the above-described configuration using the protrusions and the screws, and it is also possible to employ only a plurality of screws or another fixing structure such as a hook or a band. Conversely, the present invention is not limited to such a separate product, and may be integrally formed with a housing on the main body side such as a blade case if molding is possible.
Further, the grip portion and the nozzle portion are not integrally formed, but a structure in which separate molded products are connected to each other, for example, by attaching a separate nozzle portion to the lower end of the grip portion with a screw or the like can be adopted.
[0012]
In addition, the specific shapes of the grip portion and the nozzle portion are not limited to the above-described embodiments. For example, the grip portion may have a bar shape extending in the left-right direction, and the dust collection port of the nozzle portion may have an elliptical shape along the peripheral edge of the saw blade. A change such as an arc shape is possible. Needless to say, the present invention can be applied to other cutting machines such as cutters other than the circular saw, and can be applied not only to AC tools but also to rechargeable tools.
[0013]
【The invention's effect】
According to the first aspect of the present invention, since the front grip having the grip portion and the nozzle portion is employed, the grip and the nozzle can be easily installed in a narrow space, and the number of parts is small. Configuration. In addition, since the grip is located at the upper end and the nozzle is located below, the hose connected to the nozzle interferes with the grip of the grip, and conversely, the grip interferes with the routing of the hose. Or not. Therefore, both functions of supporting the cutting machine and collecting dust can be suitably used without impairing operability and workability.
According to the second aspect of the present invention, in addition to the effect of the first aspect, a guide piece projecting across the rotary blade is provided at the outer edge of the rotary blade at the opening of the nozzle portion of the front grip. Thereby, dust collection at the nozzle portion can be favorably performed.
[Brief description of the drawings]
FIG. 1 is a left side view of a mushroom.
FIG. 2 is a right side view of the circle saw.
FIG. 3 is a plan view of a circular saw.
[Explanation of symbols]
1. marunoco, 2. body, 4. saw blade, 5. connecting arm, 6. base, 14. handle, 16. front grip, 18. convex part, 21. grip part, 22 Nozzle part, 23 dust collecting port, 24 discharge port, 25 guide piece.

Claims (2)

A cutting machine equipped with a disk-shaped rotary blade driven by a motor on a main body mounted on a base,
A grip portion is provided at the upper end on either the base or the main body in the cutting direction front side of the main body, and a cylindrical nozzle portion which is opened at the periphery of the rotary blade in a mounted state is provided below the grip portion. A cutting machine equipped with a front grip provided. The cutting machine according to claim 1, further comprising a guide piece protruding in a shape crossing the rotary blade at an outer edge of the rotary blade at an opening of the nozzle portion of the front grip.

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