JP2012115945A - Portable cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive energy-saving portable cutter, which suppresses the wasteful power consumption of a commercial power source or a battery pack by cutting off the power supply to a motor in the case where a user does not intend it.SOLUTION: The portable cutter includes: a body part 2, which has a cutting edge 3 for cutting a material to be processed, a housing 7 for storing the motor 4 for rotating the cutting edge 3, a saw cover 6 being fixed to the housing 7 to cover the cutting edge 3, and a handle 5 having a trigger 10 for controlling the rotation of the motor 4, and a base part 1, which is connected to the housing 7, slides on the material to be processed and has an opening to allow the cutting edge 3 to project. The cutter includes a move regulating member, which is provided in the body part 2 and moves between a position that enables the drive of the motor 4 and a position which disables the drive of the motor.

Description

  The present invention relates to a portable cutting machine.

  A portable circular saw (hereinafter referred to as a circle), which is a conventional portable cutting machine, is mainly composed of a base portion that slides on a workpiece and a main body portion connected to the base. The main body has a saw blade for cutting the workpiece, a motor that drives the saw blade, and a handle that is gripped by the operator. The amount of protrusion of the saw blade from the bottom of the base can be adjusted. It is configured.

  On the other hand, as a motor drive source, a type that receives power from a commercial power supply as disclosed in Patent Document 1 (a circular saw with a cord) and a body that can be attached to and detached from a main body as disclosed in Patent Document 2 There are two types (cordless circular saws) that receive power supply from a battery pack made of a secondary battery to be attached.

JP 2010-036269 A JP 2008-229763 A

  The corded circular saw can be used as long as it is connected to a commercial power supply, but cannot be used in a place without a power supply environment. On the other hand, cordless circular saws can be used even in places where there is no power supply environment, and are easy to use.

  However, the cordless circular saw needs to be charged when the usage time is limited or the battery pack becomes empty depending on the state of charge of the battery pack. Furthermore, when the cordless circular saw is left in a state where the battery pack is connected, it is conceivable that the motor is unintentionally driven and consumes the power of the battery pack. If the battery pack is a lithium battery, the battery pack may be over-discharged and shorten the life of the battery pack. On the other hand, in the case of a circular saw with a cord, similarly, if it is left in a state where it is connected to a commercial power supply, it is conceivable that the motor is unintentionally driven and consumes excess power.

  Therefore, the present invention aims to eliminate the above-described conventional drawbacks, cut off the power supply to the motor when not intended, and suppress the wasteful power consumption of the commercial power source or the battery pack.

  In order to solve the above problems, the present invention provides a cutting blade for cutting a workpiece, a housing for storing a motor for rotationally driving the cutting blade, a saw cover fixed to the housing and covering the cutting blade, A handle having a trigger for controlling the rotational drive of the motor; and a base having an opening that is connected to the housing and slides on the workpiece and from which the cutting blade protrudes. A portable cutting machine provided with a movement restricting member which is provided on the main body and is movable between a position where the motor can be driven and a position where the motor cannot be driven. A cutting machine is provided.

  The movement restricting member is preferably a hook member.

  In addition, the hook member has a hook rotation shaft on the side of the main body portion on the motor side that is rearward in the cutting direction, is rotatable about the hook rotation shaft, and the hook rotation shaft It is preferably supported so as to be slidable in the direction.

  The main body has a hook contact portion, and when the hook member is not in contact with the hook contact portion, the motor can be driven, and the hook member is in contact with the hook contact portion. In the contact state, it is preferable that the motor cannot be driven.

  The main body has a restricting portion connected to the movement restricting member and restricting the operation of the trigger, and the restricting portion rotates around a restricting rotation axis as the movement restricting member rotates. By being moved, it is preferable that the trigger operation is restricted and the motor cannot be driven.

  According to the present invention, power supply to the motor can be cut off when not intended, so that it is possible to suppress wasteful power consumption of the commercial power supply or the battery pack.

The top view which shows embodiment of the portable cutting machine used as this invention. The figure which shows the use condition of the portable cutting machine of FIG. The side view which shows carrying of another implementation of the portable cutting machine used as this invention. FIG. 4 is a partially enlarged view seen from the X direction of FIG. 3. FIG. 4 is a sectional view taken along line AA in FIG. 3 and shows a first state of the hook member. It is an AA line sectional view of Drawing 3, and is a figure showing the 2nd state of a hook member. BB sectional drawing of FIG.

  The first embodiment of the portable circle according to the present invention will be described with reference to FIGS. First, this round structure according to the present invention will be described.

The circular saw is mainly composed of a base portion 1 that slides on a workpiece and a main body portion 2 connected to the base portion 1.
The base part 1 is comprised from the main base 1a connected with the main-body part 2, and the auxiliary | assistant base 1b attached to the main base 1a so that attachment or detachment is possible. When the auxiliary base 1b is attached to the main base 1a, the guide portion 1c provided in the front-rear position (left and right direction in FIG. 1) of the auxiliary base 1b is inserted into an insertion hole (not shown) of the main base 1a, and the guide portion 1c is inserted by the knob 1d. Is performed by pressing against the main base 1a.

  The main body 2 mainly includes a cutting blade 3 for cutting a workpiece, a motor 4 for driving the cutting blade 3, and a handle 5 held by an operator. The outer periphery of the cutting blade 3 is covered with a saw cover 6. The motor 4 is accommodated in a motor housing 7. The handle 5 is located between the saw cover 6 and the motor housing 7 (vertical direction in FIG. 1) and is a portion that is gripped by the operator.

  A battery mounting portion 9 for attaching a battery pack 8 serving as a drive source of the motor 4 is provided at an end portion of the handle 5. The handle 5 is provided with a trigger switch 10 for controlling the driving and stopping of the motor 4, and an off-lock switch 11 for restricting the on operation of the trigger switch 10 is provided in the vicinity of the trigger switch 10. Yes.

  The base portion 1 and the main body portion 2 are connected by a connecting portion 12. The connecting portion 12 is provided on each of a support portion 12a erected from the base portion 1, a supported portion 6a provided on one end side (the right side in FIG. 1) of the saw cover 6, and the support portion 12a and the supported portion 6a. And a bolt 12b inserted into a through hole (not shown). Furthermore, a cutting depth adjusting mechanism 13 for adjusting the amount of protrusion of the cutting blade 3 from the bottom surface of the base portion 1 is provided on the side opposite to the connecting portion 12 (left side in FIG. 1). The base portion 1 and the main body portion 2 are also connected by the mechanism 13.

  The adjustment mechanism 13 includes a link portion 13a erected from the base portion 1 and a knob 13b that is provided on the main body side and is inserted into a long hole (not shown) formed in the link portion 13a. After the main body part 2 is rotated with respect to the base part 1 with the connecting part 12 (bolt 12b) as a fulcrum, the protruding amount of the cutting blade 3 from the bottom surface of the base part 1 is adjusted to a desired depth, and then the knob 13b is moved. By tightening, the cutting operation can be performed with a desired cutting depth.

  In addition, the base portion 1 includes an inclination mechanism 14 for inclining the main body 2 with respect to the base 1. The tilt mechanism 14 includes a tilt support portion 14 a provided in the base portion 1 and a knob 14 b that is screwed to the main body portion 2. After the knob 14b is loosened and the body part 2 is tilted with respect to the base part 1 with the tilting fulcrum 14c as a fulcrum to a desired tilt angle, the knob 14b is tightened and the tilt support part 14a is sandwiched between the body part 2 and the knob 14b. Inclined cutting can be performed.

  Next, this feature of the circle according to the present invention will be described. The circular saw is configured so that the motor 4 is not driven when the operator wants to. This will be described in detail below.

  The round main body 2 is provided with a hook 15 which is a hook member for hooking a circular saw at an arbitrary place in the work place. The hook 15 is substantially U-shaped, and is formed by a hook end 15a at the tip, a hook intermediate 15b at the middle, and a hook rotation shaft 15c. By hooking the hook end portion 15a to the hooking portion 20 such as a metal fitting or wood provided on the wall, the circular saw body can be stored when the cutting operation is not performed. Further, the hook 15 is rotatably supported by a support portion 23 provided on the side surface of the main body portion 2 and having a support portion through hole 23a provided in the direction of the hook rotation shaft 15c, and is sandwiched between the support portion through holes 23a. As shown in FIG. 4, the hinge 22 is inserted between the hook 15 and the hinge 22 so as to be screwed together with the screw 21, thereby preventing the hook 15 from falling off the main body 2 (FIG. 4). In addition, the hook rotation shaft 15c penetrates the support portion 23 provided in the main body portion and is prevented from falling off by the hinge 22 provided at the end of the hook rotation shaft 15c. It may be configured to move in the direction of the rotation axis 15c (FIG. 2). The position at which the hook is provided is not limited to the side surface of the main body 2, and may be provided at any position such as the side surface of the handle 5 or the side surface of the battery mounting portion 9, and the base portion on the extension shaft of the hook end portion 15 a. It is more preferable that the hooks 15 are installed at positions where the 1 and the main body 2 do not overlap (FIGS. 2 and 3).

  Next, a mechanism for permitting or prohibiting driving of the motor 4 will be described below.

  As shown in FIG. 1, a hook accommodating portion 25 is accommodated on the surface or inside of the main body portion 2 or the base portion 1, and the hook accommodating portion 25 has a leaf spring 24 that is a hook abutting portion. The leaf spring 24 is in electrical communication with a part of a circuit (not shown) for driving the motor 4. When the leaf spring 24 is pressed by the hook 15, the circuit for driving the motor 4 is turned on. The motor 4 is ready for driving. Specifically, when the hook 15 is inserted into the hook housing portion 25, the leaf spring 24 and the switch portion 24a provided in the circuit portion (not shown) are electrically connected as shown by the broken line portion in FIG. Can be driven. When the trigger 10 is operated in this state, the motor 4 is driven. Conversely, when the hook 15 is pulled out by the operator as shown by the solid line portion in FIG. 1, the electrical connection with the switch portion 24 a is released by the urging force of the leaf spring 24, and a circuit for driving the motor 4 is provided. The motor 4 is turned off and the motor 4 cannot be driven. Even if the trigger 10 is operated in this state, the motor 4 is not driven. Accordingly, the motor 4 is not driven when the hook 15 connected to the main body 2 is hooked on the hook 20 or the like. The hook contact portion is not limited to the leaf spring 24, and may be composed of electronic components such as switches and elements.

  Next, another embodiment of the present invention will be described.

  As shown in FIGS. 5 to 7, an off-lock switch 11 that is a restricting portion is provided inside the handle 5 of the main body 2, and the off-lock switch 11 is located inside the handle 5 around a restricting rotation shaft 11a. It is configured to rotate, and when the off-lock switch end portion 11b comes into contact with the trigger 10, the operation of the trigger 10 is restricted and the motor cannot be turned on. Further, a stopper 26 for restricting the turning operation of the off-lock switch 11 is disposed in the handle 5, and the stopper 26 is pressed against the hook turning shaft 15c by an elastic body 26a. When the hook 15 is stored, the hook 15 is provided on the wall surface on the front surface of the handle 5. When the hook 15 is used, the hook 15 is raised and rotated to a position parallel to the cutting blade 3. At this time, the hinge 22 is fixed to the hook 15 with the screw 21, and the hinge 11 is also rotated in accordance with the rotation of the hook 15. The hinge 22 rotates when the hook 15 is used, so that the stopper 26 disposed in the handle 5 is pressed against the hinge 22 and slides in the direction opposite to the urging force of the elastic body 26a. The stopper groove 26b provided in the stopper 26 located in front of the motor 11 moves from the front surface of the off-lock switch 11 and the off-lock switch 11 becomes unrotatable so that the trigger 10 cannot be operated and the motor 4 can be driven. Disappear.

  Next, the effects according to the present invention will be described below.

  According to the first aspect of the present invention, the cutting blade 3 that cuts the workpiece, the housing 7 that houses the motor 4 for rotationally driving the cutting blade 3, and the saw cover that is fixed to the housing 7 and covers the cutting blade 3. 6 and a handle 5 having a trigger 10 for controlling the rotational drive of the motor 4, and an opening that is connected to the housing 7 and slides on the workpiece and from which the cutting blade 3 protrudes. In the portable cutting machine provided with the base part 1 having, a movement restricting member which is provided in the main body part 2 and is movable between a position where the motor 4 can be driven and a position where the motor cannot be driven Is provided with a portable cutting machine.

  By adopting such a configuration, it is possible to prevent the motor from being unexpectedly driven, and it is possible to suppress consumption of extra power of the battery pack.

  According to the invention of claim 2, the movement restricting member is preferably the hook member 15.

  With this configuration, when the hook member is used, it is a time when the cutting operation is not performed. Therefore, an efficient member (movement restricting member) can be provided with a simple configuration, and the motor is unexpectedly driven. This can prevent the battery pack from consuming excessive power.

  According to the invention of claim 3, the hook member 15 has the hook rotation shaft 15 c on the side of the main body 2 on the motor 4 side in the cutting direction, and rotates about the hook rotation shaft 15 c. It is preferably supported so as to be slidable in the direction of the hook rotation shaft 15c.

  By adopting such a configuration, it is possible to eliminate the dissatisfaction that the main body part becomes an obstacle when using the hook and it is difficult for the operator to hook the hook, and it is possible to prevent the motor from being unexpectedly driven with a simple configuration, It is possible to suppress consumption of extra power of the battery pack and provide a portable cutting machine with good workability.

  According to the invention of claim 4, the main body 2 has the hook contact portion 24, and when the hook member 15 is not in contact with the hook contact portion 24, the motor 4 can be driven, and the hook member When 15 is in contact with the hook contact portion 24, it is preferable to make the motor 4 impossible to drive.

  With such a configuration, the driving of the motor can be controlled with a simple configuration, and an inexpensive portable cutting machine for members can be provided.

  According to the fifth aspect of the present invention, the main body portion 2 has the restriction portion 11 that is connected to the movement restriction member and restricts the operation of the trigger 10. It is preferable that the operation of the trigger 10 is restricted by turning around the restriction turning shaft 11a and the motor 4 cannot be driven.

  With such a configuration, the driving of the motor can be controlled with a simple configuration, and an inexpensive portable cutting machine for members can be provided.

  Base portion 1 Body portion 2 Cutting blade 3 Motor 4 Handle 5 Saw cover 6 Housing 7 Trigger 10 Restriction portion 11 Restriction rotation shaft 11a Hook member 15 Hook rotation shaft 15c Hook contact portion 24

Claims (5)

A cutting blade that cuts the workpiece; a housing that houses a motor for rotationally driving the cutting blade; a saw cover that is fixed to the housing and covers the cutting blade; and a trigger that controls the rotational driving of the motor. A main body having a handle,
A portable cutting machine comprising: a base portion connected to the housing and sliding on the workpiece and having an opening from which the cutting blade protrudes;
A portable cutting machine comprising a movement restricting member that is provided in the main body and is movable between a position where the motor can be driven and a position where the motor cannot be driven.   The portable cutting machine according to claim 1, wherein the movement restricting member is a hook member.   The hook member has a hook rotation shaft on the side of the main body portion on the motor side that is rearward in the cutting direction, is rotatable about the hook rotation shaft, and extends in the hook rotation axis direction. The portable cutting machine according to claim 2, wherein the portable cutting machine is slidably supported.   The main body portion has a hook contact portion, and when the hook member is not in contact with the hook contact portion, the motor can be driven, and the hook member is in contact with the hook contact portion. The portable cutting machine according to any one of claims 2 to 3, wherein the motor cannot be driven.   The main body has a restricting portion connected to the movement restricting member and restricting the operation of the trigger, and the restricting portion is rotated around a restricting rotation axis as the movement restricting member rotates. The portable cutting machine according to claim 1, wherein the trigger operation is restricted, and the motor cannot be driven.