JP5786312B2 - Portable cutting machine - Google Patents

Description

  The present invention relates to a portable cutting machine, for example, a portable circular saw.

  A conventional portable cutting machine, for example, a portable circular saw (hereinafter simply referred to as “circular saw”) will be described with reference to FIGS. The circular saw can carry a cutting machine for cutting a processing member such as wood, and has a main body having a circular saw blade 3 and a motor (not shown) for driving the circular saw blade 3. And the base 1 that slides on the workpiece, is excellent in portability, and is frequently used not only in factories but also in construction sites.

  As shown in FIGS. 9 and 10, a general circular saw is configured to cut a processing member by projecting a circular saw blade 3 from the opening 1 </ b> B of the base 1 toward the processing member. The base 1 is configured to surround the circular saw blade 3.

  Therefore, as shown in FIG. 11, when the distance Y between the side surface of the circular saw blade 3 and the base side surface 1A becomes long and it is desired to cut the workpiece along the wall, the side surface of the circular saw blade of the base 1 and the wall The base portion (distance Y) located between the two may interfere with the cutting of the wall.

  Therefore, when cutting the wall, as shown in FIGS. 6 and 7, the base 1 is divided into a main base attached to the main body and a sub-base 1 a detachable from the main base 1. A so-called cut circular saw that can be cut to the wall by using the sub-base 1a with the sub-base 1a removed is used.

JP 2006-1151 A

  Here, in the cutting work, there is a work of pasting a new floor board on an old floor board as an example of the replacement of the floor board of the interior reform. Here, as shown in FIG. 8, the baseboard 112 which is a member for concealing the end of the floorboard 111 is not replaced, and a new floorboard thickness (about 10 mm) is cut (hereinafter referred to as “baseboard cutting”). .) Insert a new floor board at the cutting point.

  When the baseboard is cut, a detachable sub-base 1a as shown in FIG. 7 is provided, and when the sub-base 1a is detached, the distance Z between the saw blade 3 and the floor board 111 can be further reduced. Was commonly used.

  However, as shown in FIGS. 7 and 8, it is very unstable to perform baseboard cutting in a state where the main body 2 is inclined by approximately 90 degrees with respect to the bottom surface of the floor plate 111, and furthermore, the side surface of the saw cover 5 and the floor plate 115. Since there is no member or the like that supports (guides) the circular saw, there is a problem that bending occurs during cutting.

  Therefore, an object of the present invention is to provide a portable cutting machine that can perform stable baseboard cutting and has less bending.

  In order to solve the above-described problems, the present invention provides a motor, a main body portion incorporating the motor, a saw blade that is rotationally driven by the motor, a saw cover that covers the upper portion of the saw blade, and the saw cover or the main body portion. A portable cutting machine provided with a base that contacts the upper surface of the workpiece, and a guide part having a guide surface is provided on a side surface of the base or the saw cover on the side opposite to the main body, the guide surface being A portable cutting machine is provided that is configured to face the non-main body side.

  Moreover, it is preferable that a plurality of the guide portions are provided.

Further, the base is a main base connected to the saw cover or the main body,
A sub-base detachably provided on the side of the main base opposite to the main body,
Preferably, the guide portion is detachably provided on a side surface of the main base with the sub base removed.

  Further, the guide portion has a guide bar connected to the opposite side of the guide surface, and the guide bar is inserted into a locking hole provided in the base and is slidable in the short direction of the base. In addition, it is preferable to provide a locking portion that can be tightened by locking means provided in the vicinity of the locking hole.

  Further, one of the base and the guide part has an adjustment part that can adjust the guide surface in parallel with the side surface of the saw blade, and the adjustment part comes into contact with the other of the base or the guide part. It has a receiving part, It is preferable that the said adjustment part can adjust the parallelism of the said saw blade side surface and the said guide surface by contact | abutting with the said receiving part.

  Moreover, it is preferable that the said guide part is provided one place in the both sides of the said base which pinched | interposed the rotating shaft of the said saw blade in the longitudinal direction of the said base.

  Further, it is preferable that at least one of the guide portions is provided on the side surface of the saw cover on the side opposite to the main body and between the rotation shaft of the saw blade and the upper end of the saw cover on the side opposite to the base.

  According to the present invention, it is possible to provide a portable circular saw having a stable and good operability by using a guide mechanism in a baseboard cutting operation.

Portable circular saw front view according to the present invention Portable circular saw top view according to the present invention 2 is a cross-sectional view taken along line AA in FIG. The figure which shows the guide adjustment by this invention FIG. 5 shows another guide adjustment according to the present invention. Front view of portable circular saw by conventional technology Top view of portable circular saw by conventional technology BB sectional view of portable circular saw according to the prior art in FIG. Front view of portable circular saw by conventional technology Top view of portable circular saw by conventional technology Cross-sectional view taken along the line CC in FIG.

  A portable cutting machine (portable circular saw) according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5. In the description, the right side of FIG. 1 is the front side of the portable cutting machine body, the left side of FIG. 1 is the rear side of the portable cutting machine body, the upper side of FIG. 1 is the upper side of the portable cutting machine body, and the lower side of FIG. It is defined as the lower part of the portable cutting machine body.

  The portable cutting machine according to the present invention includes a base 1 that is placed on a workpiece during a cutting operation and a circular saw body 2 to which a saw blade 3 that is rotated by a motor 121 is attached. Power for the motor 121 is supplied from the battery 105 (DC). A commercial power supply (AC) may be used.

  The motor is housed in the motor housing 4 (main body portion), and its rotational driving force is decelerated by the gear 122 housed in the gear box 7 and then transmitted to the rotary shaft 3a of the saw blade. The circular saw body 2 is configured to be rotatable about a support shaft 9 with respect to the base 1, and FIG. 1 shows a state where the cutting depth of the saw blade 3 protruding from the lower surface of the base 1 is the largest. Yes.

  Moreover, it has the link mechanism part 106 which adjusts the protrusion amount of the saw blade 3 from the bottom face of the base 1, ie, a cutting depth. The link mechanism unit 106 connects the base 1 and the saw cover 5 and links 107 provided along the saw cover 5 to guide the adjustment of the cutting depth, the saw cover 5, the link 107, the long slot 107a of the link, and the base. 1 and a fastening portion 107b for fixing the depth of cut of the main body portion 4 with respect to 1. The operator loosens the fastening portion 107b, slides a bolt (not shown) penetrating the elongated hole 107a along the elongated hole 107a, and the position of the main body portion 4 with respect to the base 1 is rotated around the support shaft 9. . The protruding amount (cutting depth) of the saw blade 3 protruding from the base 1 can be adjusted.

  In addition, an inclination mechanism 108 is provided in front of and behind the base 1 in the longitudinal direction so that the portable cutting machine body 2 including the main body 4 is inclined with respect to the base 1 so that the workpiece can be inclined and cut.

  The tilt mechanism 108 has tilt fixing means 108b for determining the relative position of the main body 4 with respect to the base and fixing the position.

  When the workpiece is cut by the circular saw configured as described above, the operator holds the handle 6, arranges the main body with the black line drawn on the workpiece aligned with the indicator portion 122, and turns on the trigger 109. As a result, the motor 121 built in the main body 4 is driven.

  As shown in FIG. 1, when changing the protruding amount of the saw blade 3 from the bottom surface of the base 1, that is, when adjusting the cutting depth, the support shaft 9 provided in the tilt mechanism 108 is rotated. As a fulcrum, a circular saw body including the main body 4, the saw cover 5, the saw blade 3 and the like is rotated with respect to the base 1, adjusted to a desired cutting depth, and the saw cover 5 and the link 107 are fastened by the fastening portion. Therefore, the depth of cut can be adjusted. In this state, the main body 4 can be inclined in the left-right direction with respect to the base 1.

  In a normal cutting operation, that is, when cutting a workpiece placed on a floor or the like, the link 9 is further housed at a position between the saw cover 5 and the main body 4, so that the inside of the saw cover 5 The chips that pass through are discharged from the discharge port 120 without directly colliding with the link 9. Therefore, during normal operation, chips do not adhere to the link 107, so that the links 107 can be smoothly slid by the chips when adjusting the cutting depth, and work efficiency is not reduced. Note that a dust collection cover (not shown) may be attached to the discharge port 120.

  In the case of cutting work (hereinafter referred to as cutting) of the floor material 111 at the wall, a circular saw shown in FIG. 4 is used. In other words, the cutting tool body 2 is tilted with respect to the base 4 around the tilt axis, so that the rotary blade 1 can be cut with the base 4 protruding outward from the side end 16 on the counter-motor side. It is a saw (hereinafter referred to as a cutting circular saw).

  The base 1 is connected to the portable cutting machine main body 2 in parallel with the cutting direction, that is, around the support shaft (not shown) provided parallel to the extended surface of the saw blade 3, and the portable cutting machine main body 2 is arranged on the motor side, for example. It can be rotated within a rotation range of about 12 ° to the side and about 45 ° on the non-motor side.

  The structure of the tilt mechanism on the front end side in the cutting direction of the base 1 has been described above, but the tilt mechanism on the rear end side can be configured in exactly the same manner.

  Next, a baseboard cutting mechanism according to the embodiment of the present invention will be described.

  The present invention includes a motor (not shown), a main body 4 (motor housing 4) incorporating a motor, a saw blade 3 that is rotationally driven by the motor, a saw cover 5 that covers the upper portion of the saw blade 3, and a saw cover 5 or In the portable cutting machine 2 provided with the base 1 that is connected to the main body 4 and abuts against the upper surface of the workpiece 111, the guide 101 having a guide surface 101a is provided on the side of the base 1 on the side opposite to the main body. The guide surface 101a is configured to face the non-main body portion.

  With such a configuration, the side surface of the saw cover 5 can be used downward with respect to the workpiece 111, and when the baseboard 112 is to be cut at a minimum height in a remodeling operation or the like (see FIG. 3), it is possible to provide a portable cutting machine that is stable and has good workability.

  Referring to a specific configuration in FIG. 2, in the portable cutting machine 2, guide portions 101 provided in the left and right directions on the side of the base 1 on the side opposite to the main body portion with the axis of the saw blade 3 interposed therebetween. (Second guide portion 101B) is provided, and a guide portion 101 (first guide portion 101A) is provided near the top of the saw cover 5 in the upward direction. A guide bar 101b is connected to the guide portion 101. The guide bar 101b is inserted into a locking hole 102a provided at an arbitrary position of the base 1, and the guide bar 101b is fastened to the base by the locking means 102b. It can be configured. Further, a sub-base tightening portion 121 is provided in the vicinity of the locking portion 102, and the sub-base locking hole 121a through which the guide bar of the sub-base 1a can be inserted and the sub-base 1a at a desired position of the base. Fastening means 121b that can be fastened is provided.

  2 is used with the front side in the paper direction, that is, the saw cover 5 side facing downward with respect to the direction of gravity, and each guide portion 101 abuts on the workpiece 111 and slides to cut the baseboard 112. It is a configuration that can. In addition, although the guide part 101 is the structure provided in the side surface of the saw cover 5 and the base 1 in FIG. 2, it is not limited to this Example, You may be provided in arbitrary places. For example, the safety cover 8 and the saw blade 3 may be detachably provided on the extension of the rotating shaft on the side opposite to the main body.

  FIG. 3 shows an example in which the saw cover 5 side of the portable cutting machine is used with the downward direction with respect to the direction of gravity. The portable cutting machine is used in a state where the sub-base 1a is removed, and has a guide part 101 (first guide part 101A and second guide part 101B) in contact with the workpiece 111, The structure which can cut | disconnect the baseboard 112 (cutting material) in the substantially perpendicular | vertical relationship with respect to the material 111 is illustrated. That is, the operator holds the workpiece 111 and the handle 6 in a substantially horizontal direction, and performs baseboard cutting while pushing the portable cutting machine to the right. An off-lock 123 is provided at a desired position of the handle 6 so that the trigger 109 can be kept off.

  FIG. 4 is a cross-sectional view taken along the line AA of FIG. There is a guide portion 101 (first guide portion 101A and second guide portion 101B) that is in contact with the workpiece 111, and it is possible to cut a baseboard 112 (cutting material) that is substantially perpendicular to the workpiece 111 Various configurations are illustrated. The operator grasps the handle 6 and cuts the baseboard while pushing forward in the direction of the paper.

  In FIG. 4, by operating the adjustment unit 103 provided on the side surface of the guide unit 101, the adjustment unit 103 moves in the short direction of the base 1 (longitudinal direction of the guide bar 101 b). The parallelism of the guide part 101 can be finely adjusted when the receiving part 104 which is the side surface of the base 1 abuts. Further, with such a configuration, a portion supported by the guide portion 101 with respect to the base 1 is increased, so that more stable cutting can be realized.

  5 is performed by operating the adjustment unit 103 provided on the upper surface of the base 1 as in FIG. By operating the adjustment unit 103, the adjustment unit 103 moves in the short direction of the base 1 (longitudinal direction of the guide bar 101 b), and the tip of the adjustment unit 103 and the receiving unit 104 which is the side surface of the guide unit 101 abut. Thereby, the parallelism of the guide part 101 can be finely adjusted. Further, with such a configuration, a portion supported by the guide portion 101 with respect to the base 1 is increased, so that more stable cutting can be realized.

  That is, in FIGS. 4 and 5, the guide surface 101 a can be finely adjusted by operating the adjustment unit 103. That is, fine adjustment of the baseboard cutting height H is possible.

  In addition, although it is the structure by which the adjustment part 103 was provided in the guide part 101 or the base 1 in the Example, it is not limited to this, What is necessary is just an Example which can have the same effect. For example, the adjustment unit 103 may have a configuration in which a plurality of adjustment units 103 are provided on the side surface of the guide bar 101b.

  The guide portion 101 is connected to a guide bar 101b, and the guide bar 101b can be inserted through a locking hole 102a provided in the base 1 and tightened by a locking means 102b at a desired position. The locking means 102b is provided with an elastic body such as a spring on the butterfly bolt as an operation portion, and can press the guide bar 101b against the base 1 by rotating the butterfly bolt to fix the slide of the guide bar 101b. .

  In addition, the operator can select a usage method for sliding the base 1 on the workpiece 111 and a usage method for sliding the guide portion 101 on the workpiece 111 (usage method using the guide portion as a virtual base). The configuration is as follows.

  With such a configuration, it is not necessary to prepare a plurality of portable cutting machines suitable for cutting work, and a portable cutting machine suitable for various cutting work can be provided with one product.

  A plurality of guide portions 101 may be provided on the side surface of the saw cover 5, the safety cover, the base 1, or the like.

  With such a configuration, the number of members that come into contact with the workpiece 111 is increased, so that it is possible to provide a portable cutting machine with further improved stability during cutting work.

  Moreover, it is good also as a structure which has the subbase 1a provided in the side opposite to the main body side of the base 1 so that attachment or detachment is possible, and the guide part 101 can be attached or detached in the state which removed the subbase 1a.

  With such a configuration, the dimension in the short direction of the base 1 can be reduced. Therefore, when the baseboard 112 is to be further cut at a minimum height in remodeling work or the like (the height H in FIG. 3 is made as small as possible). When it is desired to cut, a portable cutting machine that is stable and has good workability can be provided.

  The guide portion 101 further includes a guide bar 101b connected to the opposite side of the guide surface 101a, and the locking portion 102 is provided in the vicinity of the locking hole 102a provided in the base 1 and the locking hole 102a. The guide bar 101b may be configured to slide in the short direction of the base 1 and be tightened at a desired position by the locking means 102b.

  With such a configuration, when the side surface of the saw cover 5 is used downward with respect to the workpiece 111, a portable cutting machine that can cut at a height H desired by the operator and that is stable and has good workability is provided. can do.

  One of the base 1 and the guide part 101 has an adjustment part 103 that can adjust the guide surface 101a in parallel with the side surface of the saw blade 3, and the other of the base 1 or the guide part 101 has an adjustment part 103. The adjusting unit 103 may have a configuration in which the parallelism between the side surface of the saw blade 3 and the guide unit 101 can be adjusted by contacting the receiving unit 104.

  With such a configuration, it is possible to finely adjust some parallelism errors generated for each product (portable cutting machine), and it is possible to provide a cutting operation with good workability for the operator.

  The guide portion 101 includes at least a first guide portion 101A provided on the side surface of the saw cover 5 on the side opposite to the main body and between the rotation shaft of the saw blade 3 and the upper end of the saw cover 5 on the side opposite to the base. And a second guide portion 101B provided on the opposite side of the base 1 and provided on the both sides of the base 1 across the saw blade axis of the guide portion 101. .

  With such a configuration, the guide portions 101 that contact the workpiece 111 are formed at least at three positions with respect to the workpiece 111, and the virtual plane (virtual base) formed by connecting the guide portions 101 is increased. Therefore, a more stable and highly accurate cutting operation can be provided.

  The configuration of the main body of the guide portion 101 is not limited to the above-described embodiment, and only the guide surface 101a abuts substantially parallel to the workpiece 111, and a ball bearing or the like is provided between the main portion of the guide portion 101 and the installation location. It is good also as a structure which shakes a head with respect to the surface of an installation location. Furthermore, the adjustment part 103 is not limited to the structure provided in the base 1, For example, it is good also as a structure which expands / contracts in the saw blade axial direction from the side surface of the saw cover 5. FIG.

1 base 1a sub base 1A base side surface 2 portable cutting machine body 3 saw blade 4 body part (motor housing) 5 saw cover 6 handle 8 safety cover 101 guide part (guide part) 101a guide surface 101A first guide part 101B second Guide part 102 Locking part 102a Locking hole 102b Locking means 103 Adjusting part 104 Receiving part 105 Battery

Claims (4)

A motor,
A main body incorporating the motor;
A saw blade driven to rotate by the motor;
A saw cover covering the upper part of the saw blade;
In a portable cutting machine provided with a base that is connected to the saw cover or the main body and abuts on the upper surface of the workpiece,
A first guide portion provided between the rotation axis of the saw blade and the upper end of the saw cover on the opposite side of the base;
The base, removable and second guide portion having a guide surface is provided in the counter-body unit side can be fixed at an arbitrary position, said second guide portion is a rotation axis of the saw blade in the longitudinal direction of the base one place not a One provided on both sides of the base across the,
A portable cutting machine capable of coming into contact with the workpiece at three locations with the first guide portion and the second guide portion . The base is a main base connected to the saw cover or the main body,
Anda sub-base which is detachably attached to the counter-body side surface of the main base,
2. The portable cutting machine according to claim 1, wherein the second guide portion is detachable from a side surface of the main base and fixed at an arbitrary position with the sub-base removed. The second guide portion has a guide bar connected to the opposite side of the guide surface,
The guide bar is inserted into a locking hole provided in the base, is slidable in a short direction of the base, and is configured to be tightened by a locking means provided in the vicinity of the locking hole. The portable cutting machine according to claim 1, wherein a stop portion is provided. A motor,
A main body incorporating the motor;
A saw blade driven to rotate by the motor;
A saw cover covering the upper part of the saw blade;
A portable cutting machine provided with a base that is connected to the saw cover or the main body and abuts against the upper surface of the workpiece,
The base is provided with a guide portion having a guide surface on the side opposite to the main body that is detachable and can be fixed at an arbitrary position, and the guide portion sandwiches the rotation axis of the saw blade in the longitudinal direction of the base. One on each side of the base,
One of the base or the guide part has an adjustment part capable of adjusting the guide surface in parallel with the side surface of the saw blade,
The other of the base or the guide part has a receiving part with which the adjustment part abuts,
The adjustment unit is capable of adjusting a parallelism between the side surface of the saw blade and the guide surface by contacting the receiving unit.