JP2009083055A - Power tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power tool allowing a change of an extending direction of a power source cord and improvement of layout of the power source cord, with excellent workability. <P>SOLUTION: This power tool has an electric motor, a housing with at least the built-in electric motor, the power source cord extending from the housing to supply power to the electric motor, and a cord armor connected to the housing to cover the power source cord. The cord armor is rotatably supported by the housing. The cord armor has a first extension portion extending in a first direction from the housing and a second extension portion extending in a second direction to be different from that of the first extension portion. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a power tool having a power cord and a cord armor that covers the power cord.

  A conventional power tool will be described with reference to FIG. FIG. 8 is a plan view of a portable circular saw shown as an example of an electric tool as viewed from above. The housing 1 includes a motor housing 1A, a gear housing 1B, and a handle 1C. A motor (not shown) is built in the motor housing 1A. The power cord 3 extends rearward in the cutting direction of the handle 1C and extends in a substantially constant direction from the motor housing side from the handle 1C which is a part of the housing. A cord armor 2 for suppressing friction between the power cord 3 and the handle 1C is attached to a mounting portion of the power cord 3 near the handle 1C. The power cord 3 is supplied with power to the power cord 3 by inserting the plug 4 into an outlet (not shown), and is supplied to an electric device such as an electric motor (not shown) or other portable circular saw. Other portable circular saw electronic devices include, for example, a light around the circular saw blade, a light that illuminates the front of the base 6, and a laser.

  In the conventional power tool, since the power cord 3 extends from the housing 1 in a substantially constant direction, it cannot be said that the power cord 3 is easy to handle. That is, taking the portable circular saw shown in FIG. 8 as an example, the power cord 3 extends from the handle 1C in a certain direction from the right side to the left side of the paper surface. Since the cord 3 gets in the way, it is necessary to forcibly deform the power cord 3 so as not to get in the way. Further, since it is difficult to maintain the deformed state, the result is an obstacle.

  An object of the present invention is to provide an electric tool with good workability that can easily change the extending direction of the power cord from the main body.

  The object is to rotatably support the cord armor on the housing, and to extend the cord armor in a first direction extending from the housing in a first direction and a second direction extending in a second direction different from the first direction. This can be achieved by having a shape having an extending portion.

  According to the present invention, since the cord armor can be rotated with the second extending portion, it can be easily rotated and the extension direction of the power cord from the main body can be easily changed. Thus, it is possible to provide an electric tool with good workability.

  An embodiment of the present invention will be described with reference to FIG. FIG. 1 is a portable circular saw that is an example of an electric tool. A portable circular saw is an electric tool that rotates a circular saw blade by electricity.

  The portable circular saw of FIG. 1 has a portable circular saw body X and a base 6. The portable circular saw body X has a housing 1. The housing 1 includes a motor housing 1A containing a motor (not shown), a gear housing 1B, and a handle 1C. The gear housing 1B incorporates a gear (not shown) that transmits the rotation of the electric motor to the circular saw blade 5 shown in FIG. A saw cover 11 is detachably provided on the gear housing 1B. A dust collection tube 14 is provided on the upper portion of the saw cover 11. An electric motor (not shown) has a rotating shaft, and extends in a direction substantially parallel to a circular saw blade shaft 5A described later.

  As shown in FIG. 2, the main body X of the portable circular saw is provided so as to be able to turn in the front-back direction in the cutting direction with respect to the base 6, and the center of rotation is a pin 13A. The base 6 is provided with a link 13C, and the main body X is provided with a tightening portion 13B. The link 13C has a substantially arc-shaped hole 13C1 with the pin 13A at the center of rotation as the center. The tightening portion 13B includes a shaft portion 13B3, an abutting portion 13B2 provided at one end of the shaft portion, and a rotatable knob 13B1 provided at the other end of the shaft portion. A shaft portion is inserted through the hole 13C1, and an abutting portion 13B2 and a rotatable knob 13B1 are provided at one end of the shaft portion 13B3 so as to sandwich the link 13C1. The main body X can be rotated with respect to the base 6 by moving the shaft part 13B3 inside the hole part 13C1.

  When the knob 13B1 is rotated, the abutting portion 13B2 and the shaft portion 13B3 move in the axial direction of the shaft portion 13B3. Thus, the movement of the abutting portion 13B2 by the rotation of the knob 13B1 restricts the rotation of the base 6 provided with the link 13C and the main body X provided with the tightening portion 13B.

  As shown in FIG. 1, a cord armor 2 is provided behind the handle 1C in the cutting direction and on the motor housing 1A side, and a part of the power cord 3 is provided in the cord armor 2. . A plug 4 is provided at the end of the power cord 3 opposite to the cord armor and can be connected to an outlet (not shown).

  As shown in FIG. 1, the cord armor 2 extends in a first direction so as to be orthogonal to the handle 1 </ b> C from a handle 1 </ b> C that is a part of the housing 1. A portion extending in the first direction is referred to as a first extending portion 2A. Also, it extends in the second direction, which is a vertical direction different from the first direction. A portion extending to the second portion is referred to as a second extending portion.

  As shown in FIG. 2, the handle 1C is provided with a switch 1C1, and power is supplied to an electric motor (not shown) by operating the switch. An electric motor (not shown) is engaged with a gear (not shown), and the gear (not shown) is engaged with a circular saw blade shaft 5 </ b> A that is a shaft of the circular saw blade 5. The circular saw blade 5 is fixed to the circular saw blade shaft 5A, and the circular saw blade 5 can be attached to and detached from the circular saw blade shaft 5A.

  The circular saw blade 5 can project downward from the base 6 by a slit (not shown) provided in the base 6. A safety cover 7 is provided so as to cover the circular saw blade 5 protruding downward from the base. The safety cover 7 can project downward from the base 6 through a slit (not shown). The safety cover 7 can be rotated about the circular saw blade shaft 5A as a center of rotation. When the safety cover 7 comes into contact with the work material, the safety cover 7 is rotated. By rotating, the safety cover 7 is movable above the base 6. Yes.

  A saw cover 11 is provided so as to cover the circular saw blade 5, and the saw cover 11 is detachably provided on the gear housing 1B shown in FIG. The saw cover 11 and the gear housing 1B are attached and detached by bolts 11A. The gear housing 1B is provided with a female screw (not shown) that is screwed with the bolts 11A. It can be fixed to 1B.

  A duct 14 is provided on the upper portion of the saw cover 11. The duct 14 has a convex portion (not shown). The saw cover 11 is provided with a groove portion (not shown) that fits the convex portion. The duct 14 is rotatable. In addition, the duct 14 can be made non-rotatable with respect to the saw cover 11 by being engaged with another groove portion provided on the saw cover 11 and engaged with the convex portion.

  As shown in FIG. 2, the main body X of the portable circular saw is rotatably provided in a direction perpendicular to the cutting direction with respect to the base 6, and the center of rotation is the cutting of the portable round. It is the pin 12B shown in FIG. As shown in FIG. 4, the main body X is provided so as to be rotatable about the pin 12 </ b> B with respect to the base 6, and the main body X is rotatable in the clockwise direction.

  In FIG. 1, the main body X of the portable circular saw shows a tightening portion 12 </ b> A for tightening rotation in a direction perpendicular to the base 6 in the front-rear direction. The tightening portion 12A includes a knob 12A1, a butting portion 12A2, and a shaft portion 12A3. Further, an inclination adjusting plate 12C inserted through the shaft portion is provided.

  The inclination adjusting plate 12C has an arc-shaped hole centered on the center of rotation, and the main body X of the portable circular saw moves relative to the base 6 as the shaft 12A3 moves in the hole. It can rotate in the direction perpendicular to the cutting direction. Such an operation is called inclination.

  FIG. 3 shows a rear view of the portable circular saw. The code armor 2 of the portable circle is shown extending backward in the cutting direction, which is the second direction. In addition, the AA line which is a cross section demonstrated later in FIG. 6 is shown in the figure of FIG.

  Further, FIG. 4 shows a BB line which is a cross section described later with reference to FIG.

  FIG. 6 is a cross-sectional view taken along line AA in FIG. AA line sectional drawing shows sectional drawing of handle 1C and cord armor 2 vicinity. A power cord 3 is provided inside the handle 1 </ b> C and the cord armor 2. The cord armor 2 has a protruding portion 2C and is in contact with an abutment 1C4 in the handle 1C. The cord armor 2 is rotatable with respect to the handle 1C. In this rotation, as shown in FIG. 1, the second extending portion 2 </ b> B can be easily rotated. Moreover, since the 2nd extending | stretching part 2B extends in a 2nd direction when it rotates, it can guide the power cord 3 installed in the cord armor 2 easily in a 2nd direction. it can. Here, as shown in FIG. 6, the position of the power cord 3 is freely changeable inside the handle.

  As shown in FIG. 1, the cord armor 2 extends from the motor housing 1A of the handle 1C.

  FIG. 7 is a sectional view taken along line BB in FIG. The cross-sectional view taken along the line B-B shows the inside of the handle 1 </ b> C and the power cord 3. The power cord 3 is fixed by a cord clip 10 that is a fastening portion above the cord armor 2. Between the cord clip 10 and the cord armor 2, the position of the power cord 3 can be freely changed. As shown in FIG. 7, the cord armor 2 is rotatable with respect to the handle 1C by a projection 2C of the cord armor 2.

  The operation of the portable cutting machine of the present invention will be described. When a switch 1C1 provided on the handle 1C is operated, power is supplied to an electric motor (not shown) built in the motor housing 1A that is a part of the housing. By this power supply, the rotation of the electric motor is transmitted to the gear portion built in the gear housing 1B which is a part of the housing. When the rotation is transmitted to the gear portion, the rotation is transmitted from the gear portion to the circular saw blade shaft 5A. When the operator operates the switch 1C1 in this way, the circular saw blade 5 fixed to the circular saw blade shaft 5A rotates. The circular saw blade 5 cuts the workpiece 8 by a rotational force. When the workpiece 7 is cut, chips are generated, but the chips enter the saw cover 11 and are discharged out of the main body of the portable circular saw through the duct 14. The duct 14 is provided with a dust collecting portion such as a dust collector or a dust collection bag.

  As described above, the main body of the portable circular saw can be rotated in the longitudinal direction of the cutting direction. When the knob 13B1 is operated, the tightening between the link 13C and the tightening portion 13B is released. Thus, the main body X can be rotated in the cutting direction front-rear direction with respect to the base 6. By rotating in this way, the downward protrusion amount of the circular saw blade 5 attached to the main body from the base 6 can be adjusted. In addition, the protrusion amount below the circular saw blade 5 from the base 6 becomes smaller as the shaft portion 13B3 is located above the hole portion 13C1 of the link 13. This is a cutting method used when it is desired to cut shallowly.

  Further, as described above, the main body can be rotated in a direction perpendicular to the front-rear direction of the cutting direction. When the knob 12A1 is operated, the tightening between the inclination adjusting plate 12C and the tightening portion 12A is released. Thereby, the circular saw blade 5 with respect to the base 6 can be rotated. By adjusting in this way, the angle can be adjusted. In this way, the circular saw blade 5 can be rotated with respect to the base 6 because it is necessary to cut the work material 8 at an angle other than perpendicular to the surface of the work material. This is because there are cases.

  The handling of the power cord 3 will be described with reference to FIGS. 3 and 5. The power cord 3 has a cord armor 2 near the housing, and the cord armor 2 is rotatable with respect to the handle 1C. In FIG. 3, the cord armor 2 extends backward in the cutting direction. In FIG. 5, the cord armor 2 is rotated about 160 degrees counterclockwise from the state of FIG. 3, and extends substantially forward in the cutting direction. Yes. This shows a state in which the cord armor 2 is in contact with the motor housing 1A by rotating. Although not shown in the figure, the cord armor 2 can be brought into contact with the motor housing 1A by rotating it approximately 210 degrees clockwise from the state shown in FIG.

  As described above, the cord armor 2 is provided with the second extending portion 2B, and the portion can be easily rotated with respect to the housing. In addition, since the power cord 3 can be guided in the second direction of the second extending portion when it is rotated, the extending direction of the power cord from the main body can be easily changed, It is possible to suppress the hindrance.

  Further, in this way, when the cord armor 2 is rotated by a predetermined amount, the cord armor 2 is provided so as to be able to contact with a part of the housing, and the rotation of the predetermined amount or more is regulated by the contact. It has become. Therefore, the cord armor 2 does not rotate too much with respect to the main body. For this reason, the power cord 2 installed in the cord armor 2 can be prevented from being damaged due to excessive rotation.

  In the present invention, a portable circular saw has been described as an example. However, the present invention can be widely applied as long as it has a power cord and a cord armor such as a hammer drill, a driver, a grinder, a jigsaw, a router, and a saver saw. It is something that can be done.

  In the present invention, the power cord and the cord armor are configured to extend from the handle 1C. However, if the housing is a housing, the power cord and the cord armor may be configured to extend from any location such as the motor housing 1A and the gear housing 1B. It is good because it can produce an effect.

  The effect of the present invention can be applied not only to the above-described portable circular saw but also to other electric tools. For example, a power cord and a cord armor such as a hammer drill, a driver, a grinder, a jigsaw, a router, and a saver saw can be used. If it has, it can be widely applied.

It is this top view of the circle | round | yen which shows one Example of this invention. It is this side view of the circle | round | yen which shows one Example of this invention. It is this back view of the circle | round | yen which shows one Example of this invention. It is this side view of the circle | round | yen which shows one Example of this invention. It is this sectional drawing AA of the circle | round | yen which shows one Example of this invention. It is this sectional drawing BB of the circle | round | yen which shows one Example of this invention. It is this front view of the circle which shows one conventional example. It is this top view of the circle which shows one conventional example.

Explanation of symbols

1 is a housing, 2 is a cord armor, 3 is a power cord, 4 is a plug, 5 is a circular saw blade, 6 is a base, 7 is a safety cover, 8 is a material to be cut, 1C is a handle, 2A is a first extending portion, 2B is a 2nd extending | stretching part.

Claims (3)

An electric motor,
A housing containing at least the electric motor;
A power cord extending from the housing and supplying power to the motor;
A power tool having a cord armor connected to the housing and covering the power cord,
The cord armor is rotatably supported by the housing, and the cord armor is extended in a first direction from the housing and a second direction extending in a second direction different from the first direction. An electric tool characterized by having a shape having an extending portion.   The power cord extending in the second direction of the cord armor or the second extending portion of the cord armor contacts a part of the housing when the cord armor rotates by a predetermined amount, and rotates by a predetermined amount or more. The electric tool according to claim 1, wherein the power tool is restricted. The housing includes a motor housing that covers an electric motor having a rotating motor shaft;
A handle connected to the motor housing and extending in a direction perpendicular to the motor shaft;
The cord armor is rotatably supported on the motor housing side of the handle,
3. The electric tool according to claim 2, wherein a part of the housing that abuts when the cord armor rotates a predetermined amount is a part of the motor housing.

Images