JP2012116048A - Portable cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable cutter.SOLUTION: The portable cutter 1 includes: a housing for supporting a motor; a cutting blade driven by the motor, and for cutting an object to be cut; a main base 61 having a first abutting surface 61B that is connected to the housing and abuts on the object to be cut, and an opening through which the cutting blade protrudes from the abutting surface 61B; an auxiliary base 62 detachably mounted to the main base 61, provided on the opposite side of the main base 61 in terms of the cutting blade, and having a second abutting surface 62C for abutting on the object to be cut in cooperation with the first abutting surface 61B; and a position adjustment mechanism 7 for adjusting the position of the second abutting surface 62C in a direction across the first abutting surface 61B.

Description

  The present invention relates to a portable cutting machine, and more particularly to a portable cutting machine including an auxiliary base that can be attached to and detached from a main base.

  As shown in FIGS. 11 to 14, a portable cutting machine 900 including an auxiliary base 962 that can be attached to and detached from a main base 961 is known (see, for example, Patent Document 1). The portable cutting machine 900 removes the auxiliary base 962 from the main base 961 and performs a cutting operation when performing cutting at the wall (hereinafter referred to as cutting) as shown in FIGS. 13 and 14. By removing the auxiliary base 962, the main body 901 can be tilted opposite to the saw blade 903 side, and the cutting positions of the side surface 961C of the main base 961 and the saw blade 903 can be matched. On the other hand, during a normal cutting operation, the portable cutting machine 900 is used with the auxiliary base 962 mounted on the main base 961. In order to mount the auxiliary base 962 on the main base 961, the rod member 962F provided in the auxiliary base is inserted into the guide holes 961a and 961b (FIG. 12) formed in the main base 961, and fixed with screws 908 and the like. There is a configuration to do.

JP 2007-8063 A

  Since the portable cutting machine performs a cutting operation while sliding the base bottom surface on the material to be cut, the base bottom surface is required to be flat. However, it is difficult to attach the main base and the auxiliary base with high precision in the portable cutting machine that is used by attaching the auxiliary base to the main base during the normal operation as described above, and the bottom surface of the main base and the bottom surface of the auxiliary base are difficult to attach. There was a problem that a step occurred. When the portable cutting machine is slid on the material to be cut due to such a step, there is a problem that the material is caught on a part of the material to be cut or the main body is inclined with respect to the member to be cut.

  Accordingly, an object of the present invention is to provide a portable cutting machine with good workability in which no step is generated between the bottom surface of the main base and the bottom surface of the auxiliary base when the auxiliary base is mounted on the main base.

  In order to solve the above problems, the present invention provides a housing that holds a motor, a cutting blade that is driven by the motor to cut a member to be cut, and a first contact that is connected to the housing and contacts the member to be cut. A main base having a contact surface and having an opening for projecting the cutting blade from the first abutting surface; and detachably provided on the main base, opposite the main base with respect to the cutting blade An auxiliary base having a second abutting surface provided on the side and capable of abutting on the member to be cut together with the first abutting surface, and the second abutting surface in a direction intersecting the first abutting surface. A portable cutting machine comprising: a position adjusting mechanism for adjusting a position.

  According to such a portable cutting machine, the first contact surface and the second contact surface are adjusted by adjusting the position of the second contact surface of the auxiliary base in the direction intersecting the first contact surface of the main base. Can be made flush with each other. Therefore, the member to be cut can be cut in a stable state without rattling, and a portable cutting machine with good workability can be provided.

  In the portable cutting machine configured as described above, the position adjusting mechanism includes position adjusting means for adjusting the position of the second contact surface in a direction substantially orthogonal to the first contact surface, and the auxiliary base with respect to the main base. It is preferable to provide fixing means for fixing the auxiliary base to the main base so as not to move at a desired position in the mounting direction.

  According to such a configuration, the operator can adjust the positions of the second contact surface and the first contact surface and can fix the auxiliary base to the main base at a desired position. Therefore, the cutting operation can be performed stably.

  The position adjusting mechanism preferably includes a plurality of the position adjusting means and a plurality of the fixing means.

  According to such a configuration, since the plurality of position adjusting means and the fixing means are provided, the positioning of the second contact surface with respect to the first contact surface can be performed with higher accuracy.

  The position adjustment mechanism adjusts the position of the second contact surface in a direction substantially orthogonal to the first contact surface, and adjusts the position of the auxiliary base so as not to move relative to the main base. It is preferable to have fixing means.

  According to such a configuration, both the position adjustment of the second abutment surface of the auxiliary base and the fixing of the auxiliary base to the main base are performed by the same position adjustment fixing means. Can be realized. Moreover, the enlargement of the whole apparatus can be suppressed.

  Further, the position adjusting mechanism is preferably provided in front of the cutting blade in a direction in which the cutting of the member to be cut by the cutting blade proceeds.

  According to such a configuration, since the position adjusting mechanism is provided in front of the cutting blade in the cutting progress direction, only the front end portion of the first contact surface and the second contact surface is placed on the member to be cut. Thus, a stable cutting operation can be performed when cutting work.

  According to the portable cutting machine of the present invention, it is possible to prevent rattling when the auxiliary base is mounted on the main base and to improve workability.

The top view of the portable cutting machine which concerns on the 1st Embodiment of this invention. Sectional drawing along II-II of the portable cutting machine shown by FIG. The top view of the portable cutting machine which concerns on the 2nd Embodiment of this invention. Sectional drawing along IV-IV of the portable cutting machine shown by FIG. 3 (screwing state). The elements on larger scale which show the position adjustment fixing means vicinity of the portable cutting machine shown by FIG. 4 (screwing state). Sectional drawing (screwing state) along VI-VI of the portable cutting machine shown by FIG. Sectional drawing along the VII-VII of the portable cutting machine shown by FIG. 4 (screwing state). Explanatory drawing which shows operation | movement of the position adjustment fixing means in the screwing state of the portable cutting machine which concerns on the 2nd Embodiment of this invention. Sectional drawing which shows the state which pushed in the switching member of the portable cutting machine shown by FIG. 7 (release state). Explanatory drawing which shows operation | movement of the position adjustment fixing means in the cancellation | release state of the portable cutting machine which concerns on the 2nd Embodiment of this invention. The top view which shows the conventional portable cutting machine. Sectional drawing along XII-XII of the conventional portable cutting machine shown by FIG. Explanatory drawing explaining the cutting-off of the conventional portable cutting machine. Explanatory drawing explaining the cutting-off of the conventional portable cutting machine.

  As shown in FIGS. 1 and 2, a circular saw 1 that is a portable cutting machine according to the first embodiment of the present invention includes a housing 2, a circular saw blade 3, a saw cover 4, and a motor 5. And the base portion 6.

  The housing 2 mainly includes a housing portion 21 that holds and houses the motor 5 and a handle 22 that is integral with the housing portion 21. The handle 22 is provided with a switch (not shown) that controls the drive of the motor 5.

  The saw cover 4 houses a drive system (not shown) driven by the motor 5, and the circular saw blade 3 is rotationally driven by this drive system. The circular saw blade 3 cuts a member to be cut such as wood by rotating. The saw cover 4 is connected to the housing 2 on the side opposite to the accommodating portion 21 with respect to the handle 22. The saw cover 4 is made of metal and covers substantially half of the circular saw blade 3.

  The base portion 6 is connected to the lower side of the housing 2. The base portion 6 includes a main base 61 connected to the housing 2 and an auxiliary base 62 that can be attached to and detached from the main base 61. The main base 61 is made of metal and is made of a substantially rectangular plate material. The main base 61 rotatably supports the circular saw blade 3 and is arranged so that the longitudinal direction coincides with the cutting direction of the circular saw blade 3. The auxiliary base 62 is a substantially L-shaped metal plate, and is disposed on the opposite side of the main base 61 with respect to the circular saw blade 3. The auxiliary base 62 includes a bottom 62A that is a rectangular plate having a width smaller than that of the main base 61 and substantially the same length, and a side wall 62B that extends in a direction substantially orthogonal to the bottom 62A. The bottom portion 62A has a bottom surface 62C (FIG. 2) capable of contacting the member to be cut together with a bottom surface 61B (FIG. 2) of the main base 61 described later. The front end portion 62D and the rear end portion 62E of the side wall 62B are provided with a substantially cylindrical rod member 62F that extends substantially in parallel while partially facing the bottom portion 62A. The rod member 62F has a length substantially equal to the total length of the bottom portion 62A and the main base 61.

  The main base 61 includes an upper surface 61A connected to the housing 2, a bottom surface 61B (FIG. 2) that faces the upper surface 61A and can contact the material to be cut, and an upper surface 61A and a bottom surface that are located in the vicinity of the circular saw blade 3. 61B (FIG. 2) is connected to the side surface 61C. The side surface 61C is formed with a notch that is an opening (not shown) for projecting the circular saw blade 3 from the bottom surface 61B (FIG. 2).

  A guide portion 61D in which a guide groove 61a for guiding the rod member 62F is formed is provided at a position facing the pair of rod members 62F on the upper surface 61A of the main base 61. The guide portion 61D located in front of the circular saw blade 3 in the cutting direction in which cutting of the member to be cut proceeds is arranged on the position adjusting means 7 arranged on the side surface 61C side and on the side opposite to the side surface 61C. A position adjusting mechanism comprising a fixing means 8 is provided.

  The position adjusting means 7 includes a support member 71 that covers the side surface 61C side end of the guide groove 61a, an adjustment screw 72 that is rotatably supported with respect to the support member 71, and the support member 71 in the support member 71 as the adjustment screw 72 rotates. And a spring 74 that biases the adjustment screw 72 upward.

  The support member 71 has a substantially box shape and has a through hole 71a that extends in the direction in which the guide groove 61a extends and communicates with the guide groove 61a. The through hole 71a has a diameter larger than the outer diameter of the rod member 62F. A through hole 71b having a diameter substantially larger than the diameter of a male screw portion 72A of an adjusting screw 72 described later is formed on the upper surface 71A of the support member 71. One end of a spring 74 is fixed to the upper surface 71 </ b> A of the support member 71.

  The adjustment screw 72 includes a male screw portion 72A, an operation portion 72B that is connected to the male screw portion 72A and rotates integrally, and a restricting means 72C that restricts the movable range of the adjustment screw 72. Specifically, the restricting means 72 </ b> C holds the adjustment screw 72 at a position where the male screw portion 72 </ b> A and the female screw portion 73 </ b> A of the moving member 73 to be described later cannot be removed together with the support member 71 and the spring 74.

  The moving member 73 is housed so as not to rotate with respect to the support member 71 and to be movable in the vertical direction. The moving member 73 is formed with a through hole 73a having a diameter slightly larger than the outer diameter of the rod member 62F. The moving member 73 has a female screw portion 73A that can be screwed into the male screw portion 72A, and the accommodation space of the male screw portion 72A defined by the female screw portion 73A is communicated with the through hole 73a.

  The fixing means 8 includes a support member 81 that covers the opposite side 61C side of the guide groove 61a, a fixing screw 82 that is rotatably supported by the support member 81, and biases the fixing screw 82 against the support member 81. A spring 83 is provided. The support member 81 is formed with a through hole 81a that faces the through hole 71a formed in the support member 71, extends in the same direction, and has a diameter of substantially the same size. The support member 81 has a female screw portion 81A that can be screwed into a male screw portion 82A of a fixing screw 82, which will be described later, and a housing space of the male screw portion 82A defined by the female screw portion 81A is communicated with the through hole 81a. The fixing screw 82 includes a male screw portion 82A and an operation portion 82B that is connected to the male screw portion 82A and rotates integrally. One end of the spring 83 is fixed to the upper end portion of the support member 81, and the other end is fixed to the operation portion 82B.

  Next, attachment of the auxiliary base 62 to the main base 61 will be described. First, the rod member 62F on the front side of the auxiliary base 62 is inserted into the through holes 71a, 73a, the guide groove 61a, and the through hole 81a and is disposed at a predetermined position in the guide groove 61a, and at the same time, the rod member 62F on the rear side is guided. It is inserted into the groove 61a and arranged at a predetermined position in the guide groove 61a. In this state, the operation portion 82B of the fixing screw 82 is rotated against the urging force of the spring 83. As the operating portion 82B rotates, the male screw portion 82A descends while being screwed into the female screw portion 81A. Therefore, the lower end of the male screw portion 82A presses the rod member 62F against the groove bottom of the guide groove 61a, and the auxiliary base 62 is moved to the main base. It is fixed to 61 so that it cannot move. Specifically, the rod member 62F is tightened at a desired position in the mounting direction (width direction) of the auxiliary base 62 with respect to the main base 61 such that the auxiliary base 62 is fixed to the main base 61 so as not to move. Next, when the operation portion 72B of the position adjusting means 7 is rotated, since the male screw portion 72A and the female screw portion 73A are screwed together, the moving member 73 and the adjusting screw 72 move relatively. At this time, the moving member 73 is supported so as not to rotate with respect to the support member 71, and the adjustment screw 72 is held in the vertical direction by the restricting means 72C and the spring 74. Move up and down. As the moving member 73 moves in the vertical direction, the rod member 62F disposed in the through hole 73a also moves up and down integrally. In this way, the operator rotates the operation portion 72B to move the moving member 73 up and down to make fine adjustments, and to place the bottom surface 62C of the auxiliary base 62 and the bottom surface 61B of the main base 61 at arbitrary positions. Can be set to

  According to such a configuration, the position of the bottom surface 62 </ b> C that is the second contact surface of the auxiliary base 62 in the vertical direction that is one of the directions intersecting the bottom surface 61 </ b> B that is the first contact surface of the main base 61 is adjusted. Since the bottom surface 61B and the bottom surface 62C can be flush with each other, the member to be cut can be cut in a stable state without rattling, and a portable cutting machine with good workability can be provided. it can.

  Further, the operator can adjust the positions of the bottom surface 61B and the bottom surface 62C by the position adjusting means 7, and can fix the auxiliary base 62 to the main base 61 so as to be immovable at a desired position by the fixing means 8. . Therefore, the cutting operation can be performed stably.

  Further, since the position adjusting means 7 and the fixing means 8 are provided in front of the circular saw blade 3 in the cutting progress direction in which the circular saw blade 3 cuts the member to be cut, the bottom surface 61B and the bottom surface 62C are provided. Even when only the front end portion is placed on the member to be cut, the cutting operation can be performed stably.

  Next, with reference to FIG. 3 thru | or FIG. 10, the circular saw 101 which is a portable cutting machine based on 2nd Embodiment by this invention is demonstrated. The circular saw 1 according to the first embodiment includes a position adjusting means 7 that adjusts the position of the bottom surface 61B and the bottom surface 62C in the vertical direction, and the auxiliary base 62 at the desired position in the width direction of the main base 61. Although the fixing means 8 that is immovably fixed to the 61 is provided as a separate body, the circular saw 101 according to the second embodiment is a function of both the position adjusting means 7 and the fixing means 8. Position adjusting and fixing means 107 is also provided. Hereinafter, in the second embodiment, the same members as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIGS. 3 to 10, the circular saw 101 includes a main base 161 instead of the main base 61. The main base 161 has a position adjustment fixing means 107 instead of the position adjustment means 7 in the guide portion 61D (FIG. 3), and has a holding plate 108 instead of the fixing means 8. The holding plate 108 is a substantially U-shaped plate provided so as to cover the opposite side 61C side of the guide groove 61a, and forms a through hole 108a that is slightly larger than the outer shape of the rod member 62F together with the guide portion 61D. ing.

  The position adjustment fixing means 107 includes a support member 171 that covers the side surface 61C side end portion of the guide groove 61a, an adjustment screw 72 that is rotatably supported with respect to the support member 171, and a support member 171 as the adjustment screw 72 rotates. A moving member 73 capable of moving up and down, a switching member 174 having a female screw portion 174A (FIGS. 7 and 9) that can be screwed with the adjusting screw 72, and a spring 175 that biases the switching member 174 with a constant biasing force. (FIGS. 7 and 9).

  In addition to the structure of the support member 71, the support member 171 has openings 171a and 171b (FIGS. 6, 7, and 9) formed at the front end portion and the rear end portion, and supports the switching member 174 to be slidable in the front-rear direction. It has a switching member support portion 171A. As shown in FIG. 7, the switching member 174 has a length in the longitudinal direction longer than the length in the front-rear direction of the outer shape of the support member 171, and the length in the width direction is the length in the width direction of the inner periphery of the support member 171. And has a shape in which a long hole 174b is formed in the center in the width direction of the front end portion 174B, and both end portions in the width direction of the rear end portion 171C are notched. Near the center in the width direction and the longitudinal direction of the switching member 174, a female screw portion 174A that can be screwed with the male screw portion 72A of the adjustment screw 72 is provided. The long hole 171a of the front end portion 174B communicates with a space in which the male screw portion 72A defined by the female screw portion 174A can be disposed.

  The switching member 174 is urged forward from the rear of the support member 171 by a spring 175, and the front end portion 174B projects from the opening 171a of the support member 171 in the natural state of the spring 175. Hereinafter, the state in which the female screw portion 174A and the male screw portion 72A are screwed together is referred to as a screwed state, and the position of the switching member 174 in the screwed state is referred to as a first position.

  Next, attachment of the auxiliary base 62 to the main base 161 will be described. First, the rod member 62F on the front side of the auxiliary base 62 is inserted into the through holes 71a, 73a, the guide groove 61a, and the through hole 108a so as to be disposed at a predetermined position in the guide groove 61a, and at the same time, the rod member 62F on the rear side is guided. It is inserted into the groove 61a and arranged at a predetermined position in the guide groove 61a. At this time, as shown in FIGS. 3 to 8, the switching member 174 is in the first position, and in this state, the operation portion 72 </ b> B is rotated against the biasing force of the spring 74. As the operation portion 74B rotates, the male screw portion 72A descends while being screwed into the female screw portion 174A of the switching member 174, so that the rod member 62F is pressed against the moving member 73 by the lower end of the male screw portion 72A, and the auxiliary base 62 is moved. The main base 161 is fixed so as not to move. Specifically, the rod member 62F is tightened at a desired position in the mounting direction (width direction) of the auxiliary base 62 with respect to the main base 161 to such an extent that the auxiliary base 62 is fixed to the main base 161 so as not to move. As shown in FIG. 8, by moving the adjusting screw 72 to the bar member 62F disposed in the through hole 73a, the bar member 62F is pressed toward the moving member 73 by the adjusting screw 72, and the auxiliary base 62 It is fixed so as not to move with respect to the main base 161 in the width direction. The adjustment screw 72 moves relative to the moving member 73 while the male screw portion 72A is screwed into the female screw portion 73A. Specifically, since the adjusting screw 72 moves downward, the moving member 73 does not move. The adjustment screw 72 protrudes downward from the space defined by the female screw portion 73 </ b> A, and can tighten the rod member 62 </ b> F against the moving member 73.

  9 and 10, when the switching member 174 is pushed from the front to the rear against the biasing force of the spring 175, the female screw portion 174A of the switching member 174 and the male screw portion of the adjustment screw 72 are provided. The screwing with 72A is released. Hereinafter, a state in which the screwing of the female screw portion 174A and the male screw portion 72A is released is referred to as a released state, and the position of the switching member 174 in the released state is referred to as a second position. When the switching member 174 is in the second position, similarly to the circular saw 1 according to the first embodiment, when the operation portion 72B is rotated, the male screw portion 72A and the female screw portion 73A of the moving member 73 , The moving member 73 moves relative to the adjusting screw 72. Since the adjustment screw 72 is held by the support member 171 so as not to move in the vertical direction by the spring 74 and the switching member 174, the moving member 73 moves in the vertical direction. For example, when the switching member 174 is pushed from the first position (FIG. 7) to the second position (FIG. 9) from the state shown in FIG. 8 and the operation portion 72B is rotated, the adjustment screw is turned on as shown in FIG. 72B and the moving member 73 move away from each other, in other words, the moving member 73 moves downward. Then, after setting the bottom surface 62C of the auxiliary base 62 to a desired position in the vertical direction, when the switching member 174 is released, the switching member 174 returns to the first position by the return force of the spring 175, and the female thread portion 174A of the switching member 174 And the male screw portion 72A of the adjusting screw 72 are screwed again. By rotating the operation portion 72B in this state, the rod member 62F can be fixed to the main base 161 so as not to move at a desired position.

  According to the circular saw 101 described above, both the position adjustment of the bottom surface 62C of the auxiliary base 62 and the fixing to the main base 161 are performed by the same position adjustment fixing means 107, so that a portable cutting machine with good operability can be obtained. Can be realized. Moreover, the enlargement of the whole apparatus can be suppressed.

  The portable cutting machine according to the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made within the scope described in the claims. For example, the position adjusting means 7, the fixing means 8, and the position adjusting and fixing means 107 may be provided in the vicinity of the guide groove 61a on the rear end side in the cutting direction. By providing the plurality of position adjusting means 7 and the fixing means 8, the bottom surface 62C of the auxiliary base 62 can be positioned more accurately with respect to the bottom surface 61B of the main base 61.

  In the above-described embodiment, the rod member 72F is fixed (temporarily tightened) by the fixing means 8 and the position adjustment fixing means 107 and then the position of the rod member 72F is adjusted by the position adjustment means 7 and the position adjustment fixing means 107. However, the rod member 72F may be fixed after the position adjustment is performed by omitting the temporary tightening.

  In the above-described embodiment, the configuration in which the position of the bottom surface 62C with respect to the bottom surface 61B in the vertical direction (the direction substantially orthogonal to the bottom surface 61B) can be adjusted by the adjusting means 7 and the position adjusting and fixing means 107 is shown. The present invention is not limited to this, and can be appropriately applied to a configuration for adjusting the position of the bottom surface 62C in the direction intersecting the bottom surface 61B.

  Further, the rod member 72F may be provided on the main bases 61 and 161 side, and the guide portion 61D, the position adjusting means 7, the fixing means 8, and the position adjusting and fixing means 107 may be provided on the auxiliary base 62.

DESCRIPTION OF SYMBOLS 1 ... Circular saw, 2 ... Housing, 3 ... Circular saw blade, 4 ... Saw cover, 5 ... Motor, 6 ... Base part, 7 ... Position adjustment means, 8 ... fixing means, 21 ... accommodating portion, 21 ... anti-accommodating portion, 22 ... handle, 61 ... main base, 61A ... upper surface, 61B ... bottom surface, 61C ... Side surface, 61D: guide portion, 61a ... guide groove, 62 ... auxiliary base, 62A ... bottom, 62B ... side wall, 62C ... bottom surface, 62D ... front end, 62E ... rear end, 62F ... rod member, 71 ... support member, 71A ... upper surface, 71a ... through hole, 71b ... through hole, 72A ... male screw part, 72B ..Operating part, 72C ... regulating means, 73 ... moving member, 73A ... internal thread part, 73a ... through hole, 81 Support member, 81A ... male screw part, 81a ... through hole, 82B ... operation part, 107 ... position adjustment fixing means, 108 ... restraining plate, 108a ... through hole, 161 ... ..Main base, 171... Support member, 171A... Switching member support, 171C .. rear end, 171a .. opening, 174 .. switching member, 174A. 174B ... Front end, 174b ... Long hole

Claims (5)

A housing that holds the motor;
A cutting blade driven by the motor to cut the member to be cut;
A main base that is connected to the housing and has a first abutting surface that abuts against the member to be cut, and an opening that projects the cutting blade from the first abutting surface;
Auxiliary provided on the main base in a detachable manner, provided on the opposite side of the main base with respect to the cutting blade, and having a second contact surface capable of contacting the member to be cut together with the first contact surface Base and
A portable cutting machine comprising: a position adjustment mechanism that adjusts a position of the second contact surface in a direction intersecting the first contact surface. The position adjusting mechanism is
Position adjusting means for adjusting the position of the second contact surface in a direction substantially perpendicular to the first contact surface;
The portable cutting machine according to claim 1, further comprising fixing means for fixing the auxiliary base to the main base so as to be immovable at a desired position in the mounting direction of the auxiliary base with respect to the main base. .   The portable cutting machine according to claim 2, wherein the position adjusting mechanism includes a plurality of the position adjusting means and a plurality of the fixing means.   The position adjusting mechanism adjusts the position of the second contact surface in a direction substantially orthogonal to the first contact surface and fixes the auxiliary base to the main base so as not to move. The portable cutting machine according to claim 1, comprising:   The portable device according to any one of claims 1 to 4, wherein the position adjusting mechanism is provided in front of the cutting blade in a direction in which the cutting of the member to be cut by the cutting blade proceeds. Cutting machine.

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