JP4645332B2 - Portable electric circular saw - Google Patents

Description

  The present invention relates to a portable electric circular saw.

  A conventional portable electric circular saw 16 will be described with reference to FIG.

  FIG. 2 is a perspective view showing an example of the portable electric circular saw 16. A soft layer 13 (made of an elastomer or the like softer than the hard layer 12 forming the handle 10 for the purpose of preventing the slipping of the hand grasping the handle 10 and improving the operability and workability by improving the grip comfort. (Hatched portion) is provided on the surface of the handle 10 or the sub handle 11.

  The above-described conventional electric circular saw 16 is placed on an almost horizontal surface of the building material so that the base bottom surface 8a faces upward in order to prevent deformation of the safety cover 7 protruding downward from the base 8. There is. At that time, since the saw cover 6 is made of hard metal or resin, the building material may be damaged or the saw cover 6 itself may be deformed by an impact.

  In addition, there is a problem that the electric circular saw 16 is slippery when placed upside down on an inclined surface such as a roof.

  The object of the present invention is to eliminate the above-mentioned drawbacks, and to prevent the building material from being damaged even if it is placed upside down so that the bottom of the base is facing upward, the saw cover is not easily deformed, and the portable electric circle is difficult to slip even on an inclined surface. It is to provide this.

In order to achieve the above object, the present invention provides a housing that is an outer frame that houses a motor, a gear that transmits the rotation of the motor, a saw blade that is driven to rotate through the gear, and an attachment to the housing. A saw cover that covers the upper half of the outer periphery of the saw blade, a safety cover that protects the saw blade that covers the lower half of the outer periphery of the saw blade, and the saw cover or the housing. A base that can slide on the material to be cut, a base that can project the saw blade downward from the bottom, a switch, and a housing that is connected to both ends, a handle that is substantially parallel to, in this portable electric circular with a gripping portion to form a soft layer made of a softer material than the handle the handle, said base As scan bottom faces upward, when the this the circle was placed on a generally horizontal surface of the building material, a first portion of the handle surface, a second point on the end portion of the electric circular And at a height position above the base, the building material is in contact with the building material at a third position of the member of the electric circle located between the first place and the second place. One feature is that the second portion and the third portion that are in contact with the building material are also provided with the same soft portion as the first portion .

  When the electric circular saw of the present invention is placed upside down on a substantially horizontal surface of the building material so that the bottom surface of the base faces upward, the soft material is provided in the portion that contacts the building material, so that the building material is not easily damaged. Further, by providing a soft portion made of a material softer than the housing on the surface of the saw cover, the soft layer provided on the surface of the hard saw cover alleviates the impact, so that the saw cover itself can be hardly deformed. In addition, it is difficult to slip when placed on an inclined surface.

  In addition, the soft part is formed by injection molding and welding a softer resin than the housing on the surface of the saw cover, thereby providing a sense of unity between the soft part and the saw cover, and the soft part is peeled off from the surface of the saw cover. A difficult configuration can be obtained.

  In addition, a soft part made of a material softer than the handle surface is formed on a part of the handle surface, and when placed on a substantially horizontal surface of the building material so that the base bottom surface faces upward, the soft part on the surface of the saw cover With the structure in which a part of the soft part on the handle surface is in contact with the building material, the operability can be improved, and the main body is further damaged by the damage to the building material and the collision with the building material. It is possible to provide a portable electric circular saw that can suppress damage and is more difficult to slip even when placed on an inclined surface.

  In addition, when it is placed on a substantially horizontal surface of the building material so that the base bottom surface is directed upward, a third part that contacts the building material together with a part of the soft part on the surface of the saw cover and a part of the soft part on the surface of the handle. By forming a soft part also in the place, the portable electric circular saw which can suppress that a building material is damaged and a main body is damaged by the collision with a building material can be provided.

  In addition, when the base material is placed on a substantially horizontal surface with the base bottom facing upward, when the three parts are brought into contact with the healthy material, a line extending vertically from the center of gravity of the main body intersects the building material top surface. By adopting a configuration that is positioned within a virtual plane connecting with three places, stability when placed in the reverse direction can be improved.

  In addition, a sub handle located on the front side in the cutting direction from the handle is provided, a soft part made of a material softer than the sub handle and the handle is formed on a part of the sub handle and the handle, and the electric circular saw is attached to the bottom of the base. Part of the soft part on the surface of the saw cover, part of the soft part on the handle surface and one part of the soft part on the sub handle surface when placed upside down on a substantially horizontal surface of the building material so that the By adopting a configuration in which at least three locations including the part are in contact with the building material, the operability can be improved and the stability when placed in the opposite direction can be further improved.

  In addition, by providing a portion where the soft portion protruding on the surface of the saw cover is present and a portion where it is not present, and by providing a plurality of uneven steps on the surface of the saw cover, the material of the soft portion can be suppressed and on the inclined surface When placed, the anti-slip effect can be improved due to the uneven shape. Furthermore, different luster can be given to the surface of the saw cover, and the design can be improved.

  One embodiment of the electric circle of the present invention will be described with reference to FIGS. 1, 3, 4, and 6.

  1, 3, and 4, the electric circular saw 15 of the present invention is rotationally driven through a housing 2 that is an outer frame that houses the motor 1, a gear 3 that transmits the rotation of the motor 1, and the gear 3. A saw blade 4, a gear cover 5 that is attached to the housing 2, and is an outer frame that houses a gear 3 shaped to cover substantially the upper rear half of the outer periphery of the saw blade 4, and a gear cover 5 that is attached to or integral with the gear cover 5. A saw cover 6 which is an outer frame shaped to cover substantially the upper half of the outer periphery of the saw blade 4, a safety cover 7 which covers the substantially lower half of the outer periphery of the saw blade 4 and protects the saw blade 4, and a gear cover 5 A base 8 having a bottom surface 8a that is slidable on the material to be cut and has an opening 8b that allows the saw blade 4 to project downward from the bottom surface 8a, and a switch 9 are housed, and both ends of the housing 2 are connected to each other. Ha And $ 10, and is composed of a side handle 11 having a shape protruding to the front handle 10.

  The gear cover 5 and the saw cover 6 of this embodiment correspond to the saw cover of the present invention.

  As shown in the drawing, a soft layer 13 (soft portion) made of a material softer than the housing 2 is formed on the surface of the hard layer 12 in the gear cover 5 or the saw cover 6 or in the gear cover 5 and the saw cover 6.

  Hereinafter, the effect of the soft layer 13 will be described.

  As shown in FIG. 1, in order to prevent deformation of the safety cover 7 in which the electric circular saw 15 protrudes downward from the base 8, the base bottom surface 8 a is turned upside down on a substantially horizontal surface of a building material (not shown). The electric circular saw 15 is supported and stabilized at three locations: a contact location 15a on the saw cover 6, a contact location 15b on the handle 10, and a contact location 15c on the side handle. In this state, a point 15d where a perpendicular line drawn from a center of gravity (not shown) of the electric circular saw 15 intersects the substantially horizontal surface of the building material connects the three places supporting the electric circular saw 15. Located in a triangular virtual plane.

  Since the three places of the electric circular saw 15 are covered with the soft layer 13, the building material is hardly damaged. Further, since the contact portion 15a on the saw cover 6 is covered with the soft layer 13, when the electric circular saw 15 is placed upside down on the substantially horizontal surface of the building material, the impact is alleviated and the saw cover 6 is deformed. It becomes difficult to do. Alternatively, when the electric circular saw 15 is placed upside down on an inclined surface such as a roof, it becomes difficult to slip, and workability at a high place is improved.

  Further, as shown in FIG. 6, since the surface of the hard layer 12 appears intermittently from the surface of the soft layer 13, the soft layer 13 is formed as compared with the case where the entire surface of the hard layer 12 is covered with the soft layer 13. It requires less material such as elastomer to be used, and the cost can be reduced. In addition, when placed on an inclined surface, the anti-slip effect is high due to the uneven shape.

Moreover, since the appearance which attracts attention by making the hard layer 12 and the soft layer 13 of the electric circular saw 15 different colors, it becomes conspicuous at the store etc., and the sales promotion effect can be enhanced. Regardless of whether it is soft or hard, the first layer and the second layer may have the same hardness, and the colors may be changed.
FIG. 5 shows another embodiment of the present invention. In order to prevent deformation of the safety cover 7 protruding downward from the base 8, the electric circular saw 17 having no side handle is placed upside down on a substantially horizontal surface of a building material (not shown) so that the base bottom surface 8 a faces upward. In this case, the electric circular saw 17 is supported and stabilized at three locations, a contact location 17 a on the saw cover 6, a contact location 17 b on the handle 10, and a contact location 17 c on the end of the electric circular saw 17. In this state, a point 17d where a perpendicular line drawn from a center of gravity (not shown) of the electric circular saw 17 intersects with a substantially horizontal surface of the building material connects the three places supporting the electric circular saw 17. Located in a triangular virtual plane.

  By covering the three places of the electric circular saw 17 with the soft layer 13 made of a material softer than the housing 2, the same effect as the electric circular saw 15 having a side handle can be obtained.

  The soft layer 13 preferably has a hardness in the range of 40A to 90A defined by Japanese Industrial Standards (JIS).

The perspective view which shows this one Embodiment of this invention electric portable circle | round | yen. The perspective view which shows this example of the conventional portable electric circle. The front view which shows this one Embodiment of this invention portable electric circle. The right view which shows this one Embodiment of this invention portable electric circle. The perspective view which shows this another embodiment of this invention portable electric circle | round | yen. FIG. 2 is a cross-sectional view taken along line AA in FIG.

Explanation of symbols

1 is a motor, 2 is a housing, 3 is a gear, 4 is a saw blade, 5 is a gear cover, 6 is a saw cover, 7 is a safety cover, 8 is a base, 8a is a base bottom, 8b is an opening, 9 is a switch, 10 is A handle, 11 is a side handle, 12 is a hard layer, and 13 is a soft layer.

Claims (5)

A housing that is an outer frame for housing the motor;
A gear for transmitting rotation of the motor;
A saw blade driven to rotate through the gear;
A saw cover attached to the housing and shaped to cover substantially the upper half of the outer periphery of the saw blade;
A safety cover that protects the saw blade in a shape covering substantially the lower half of the outer periphery of the saw blade;
A base connected to the saw cover or the housing, having a bottom surface capable of sliding on a material to be cut, and capable of projecting the saw blade downward from the bottom surface;
A handle that houses a switch and that has both ends connected to the housing and is arranged substantially parallel to a side surface of the saw blade, wherein a handle is formed with a soft layer made of a material softer than the handle. In the portable electric circular saw with
When the circular saw is placed on a substantially horizontal surface of the building material so that the bottom surface of the base faces upward, a first location on the handle surface and a second location on this end of the electric circle. In a third position of the member of the electric circle located between the first place and the second place at a height position above the base and the base so as to contact the building material West,
The portable electric circular saw characterized by providing the same soft part as said 1st location also in the 2nd location and 3rd location which contact the said building material. The portable electric circular saw according to claim 1, wherein the third portion is a part of a surface of the saw cover.   The portable electric circular saw according to claim 1 or 2, wherein the soft portion is formed by injection molding and welding a softer resin than the housing.   In claim 1, when the three bases are placed on a substantially horizontal surface so that the bottom surface of the base faces upward and the three places are brought into contact with the building material, the center of gravity of the electric circular saw body extends vertically. A portable electric circular saw characterized in that a point at which a lowered perpendicular crosses the upper surface of the building material is located inside a triangular virtual surface connecting the three locations.   3. The portable electric circular saw according to claim 2, wherein a portion where the soft portion is present and a portion where the soft portion is not provided are continuously provided on the surface of the saw cover, and a plurality of uneven steps are provided on the surface of the saw cover.

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