JP2013244600A - Portable cutting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable cutting machine such that a cutting edge plate can be easily adjusted without using a tool such as a screwdriver and the position of the cutting edge plate can be finely adjusted.SOLUTION: A portable cutting machine includes a motor, a cutting machine body 11 in which the motor is incorporated, a saw blade 14 which is rotated by the motor to cut a material to be cut, a base 20 which is provided at the lower part of the cutting machine body 11 and abuts against the material to be cut, a cutting edge plate 25 which is provided nearby the cutting edge 20a of the base 20 and can slide along the base 20, and a spring 28 which energizes and presses the cutting edge plate 25 against the base 20.

Description

  The present invention relates to a blade edge plate adjusting mechanism of a portable cutting machine.

  Conventionally, in a portable cutting machine, the opening of the blade edge is set as narrow as possible in order to prevent a cut piece of wood or the like from entering from the blade edge of the base. However, the portable cutting machine is equipped with a mechanism for tilting the cutting machine body with respect to the base, and if the cutting edge is set to the required dimensions when cutting the blade, Becomes too big. Therefore, a blade plate that can adjust the opening amount of the blade is used so that both operations can be performed. The blade edge plate was fixed with screws, etc., but this fixing method requires an operation to tighten or loosen the screw when adjusting the position of the blade edge plate, making the adjustment work cumbersome and overtightening the screws There was a problem that the whole blade plate was deformed. Further, there is a problem that a tool such as a screwdriver is required for the operation of tightening or loosening the screw.

  In order to solve such a problem, in the configuration described in Patent Document 1, the blade edge plate is sandwiched by a flat screw and a tab via a leaf spring, and the position of the blade edge plate is adjusted along the corrugated groove.

Utility Model Registration No. 2537068

  However, in the structure described in Patent Document 1 described above, the blade plate moves along the pitch of the corrugated grooves, so that fine adjustment cannot be performed, and when moving from fully open to fully closed, all the corrugated grooves are overcome. There was a problem that it was necessary and difficult to operate.

  In addition, when working forgetting to widen the narrow blade plate, there is a problem that the operation of the lower guard is limited.

  Therefore, the present invention can easily adjust the blade edge plate without using a tool such as a screwdriver, can finely adjust the position of the blade edge plate, and can forget to return the blade edge plate. Even if it exists, it makes it a subject to provide the portable cutting machine provided with the blade edge plate which is hard to influence the operation | movement of a lower guard.

  The present invention has been made to solve the above-described problems, and is characterized by the following.

(Claim 1)
The invention described in claim 1 is characterized by the following points.

  That is, the portable cutting machine according to claim 1 includes a motor, a cutting machine body incorporating the motor, a saw blade that is rotated by the motor to cut a material to be cut, and a lower part of the cutting machine body A base that is in contact with the material to be cut, a blade edge plate that is provided near the blade edge of the base and is slidable along the base, and that the blade edge plate is pressed against the base. An urging member that urges, wherein the blade edge plate is set to be equal to or less than a surface of the base that contacts the material to be cut.

(Claim 2)
The invention described in claim 2 has the following features in addition to the features of the invention described in claim 1 described above.

  That is, a movement start prevention mechanism is provided for preventing the blade edge plate from moving from the standby position when the blade edge plate is not used.

(Claim 3)
The invention described in claim 3 is characterized by the following points in addition to the characteristics of the invention described in claim 2 described above.

That is, the movement start preventing mechanism is a protrusion provided on the bottom surface of the base, and the protrusion prevents the blade edge plate from moving from a standby position by restricting the sliding of the blade edge plate, and the protrusion Is formed in the thickness direction of the base with a protruding amount that the blade edge plate can get over when the blade edge plate is lifted from the bottom surface of the base against the urging force of the urging member. It is characterized by being.
(Claim 4)
The invention according to claim 4 is characterized by the following points in addition to the features of the invention according to any one of claims 1 to 3.

That is, the blade edge plate is provided with an operation portion on the upper surface side of the base for lifting the blade edge plate from the bottom surface of the base against the urging force to the base.
(Claim 5)
The invention described in claim 5 is characterized by the following points in addition to the characteristics of the invention described in claim 3 described above.

  That is, the contact surface of the blade edge plate with the protrusion when the blade edge plate is moved to the standby position, and the blade at the protrusion when the blade edge plate is moved to the standby position. At least one of the contact surfaces with the mouth plate is inclined with respect to the moving direction of the blade plate in order to facilitate the movement of the blade plate to the standby position.

  The invention according to claim 1 is as described above, and is provided near the blade edge of the base and slidable along the base, and urged so as to press the blade edge plate against the base. An urging member, and the blade edge plate is configured to be equal to or less than a surface of the base that contacts the workpiece. For this reason, when the blade edge plate is always pulled upward by the urging member, a frictional resistance is generated between the blade edge plate and the base, and the blade edge plate is held so as not to move. According to such a structure, the blade edge plate can be easily adjusted without using a tool such as a screwdriver by sliding the blade edge plate, and the position of the blade edge plate can be continuously stepped by sliding. Since the adjustment can be performed, the position of the blade edge plate can be finely adjusted.

  Further, since the blade edge plate is pressed against the base, a structure in which a step is hardly formed between the blade edge plate and the base can be obtained.

  Further, since the blade edge plate is configured to be slidable, even when the blade edge plate and the lower guard come into contact with each other due to forgetting to return it, the movement of the lower guard is not restricted by the movement of the blade edge plate.

  Further, the invention according to claim 2 is as described above, and includes a movement start prevention mechanism for preventing the blade edge plate from moving from the standby position when the blade edge plate is not used. It is possible to reliably prevent an accident in which the blade edge plate starts to move unintentionally and comes into contact with the lower guard when cutting.

  Further, the invention according to claim 3 is as described above, and the movement start prevention mechanism is a protrusion provided on a bottom surface of the base, and the protrusion regulates the sliding of the blade edge plate, thereby the blade. The mouth plate is prevented from moving from the standby position, and the protrusion can be overcome when the blade plate is lifted from the bottom surface of the base against the biasing force of the biasing member. Since it is formed in the thickness direction of the base with a small amount of protrusion, the movement start prevention can be easily released by lifting the blade plate.

  Further, the invention according to claim 4 is as described above, and an operation portion for lifting the blade edge plate from the bottom surface of the base against the biasing force to the base is provided on the blade edge plate. Since it is provided on the upper surface side of the base, it is easy to operate the blade plate.

  Further, the invention according to claim 5 is as described above, and a contact surface of the blade edge plate with the projection when the blade edge plate is moved to a standby position, and the blade edge plate. At least one of the abutting surfaces of the protrusions when the protrusion is moved to the standby position is the moving direction of the blade edge plate to facilitate the movement of the blade edge plate to the standby position. Therefore, the safety for returning the blade plate to the standby position is improved.

It is an external view of a portable cutting machine. It is a bottom view of a portable cutting machine. It is an exploded view of a blade edge plate adjustment mechanism. It is a bottom view of the base in a state where the blade edge plate is in the standby position. It is a bottom view of the base in the state where the blade opening plate is slid. (A) Side view of base with blade edge plate in standby position, (b) AA sectional view. (A) The side view of the base of the state which raised the blade edge plate, (b) It is BB sectional drawing. It is the perspective view which looked at the base of the state which raised the blade edge plate from the bottom face side.

  Embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, in the portable cutting machine 10 according to the present embodiment, a base 20 can be rotated with respect to the cutting machine body 11 at a lower part of the cutting machine body 11 that rotatably supports the saw blade 14. It is attached to. A motor is built in the motor housing 12 of the cutting machine main body 11, and the saw blade 14 is driven by operating this motor so that the material to be cut can be cut.

  The motor operates using a battery 18 detachably provided in the battery mounting portion 17 at the rear of the cutting machine body 11 as a drive source.

  Further, a grip 15 is provided on the upper portion of the cutting machine main body 11 substantially in parallel with the cutting direction of the saw blade 14, and the motor is activated by pulling a trigger 16 provided inside the grip 15. ing.

  The base 20 is a metal plate-like member that is provided at the lower part of the cutting machine main body 11 and abuts on the material to be cut, and by exposing a part of the saw blade 14 from the blade opening 20a formed through, It is formed so that the material to be cut can be cut below the base 20.

  Further, the cutting machine body 11 can be tilted with respect to the base 20 by operating the angle adjusting mechanism 19, and the saw blade 14 is tilted with respect to the base 20 by tilting the cutting machine body 11. Inclined cutting is possible.

  As shown in FIG. 2, a blade edge plate 25 slidable along the bottom surface 20 b of the base 20 is provided in the vicinity of the blade edge 20 a of the base 20. The blade edge plate 25 is slidable in the direction of narrowing the opening size of the blade edge 20a, and the size of the opening of the blade edge 20a can be adjusted by appropriately adjusting the position of the blade edge plate 25. It is like that.

  As shown in FIG. 3, the blade edge plate 25 is formed by bending a portion disposed near the opening edge of the blade edge 20a upward to form a positioning piece 25c. The positioning piece 25c is formed by the blade edge 20a. The blade edge plate 25 can be positioned at the standby position by being hooked on the opening edge (see FIG. 4).

  Further, engaging portions 25a are formed on both sides of the blade plate 25 so as to protrude sideways. The engaging portion 25a is for preventing the blade edge plate 25 from moving from the standby position by engaging with a protrusion 20c of the base 20 described later. Further, the rear portion of this engaging portion 25a (the rear portion direction when the blade edge plate 25 is slid in the direction of narrowing the blade edge 20a) is notched to form a notch portion 25b.

  Further, a through-shaft portion 25 d is erected on the blade edge plate 25, and the through-shaft portion 25 d passes through the guide hole 20 d of the base 20. The penetrating shaft portion 25d is slidable along the guide hole 20d of the base 20, so that the blade edge plate 25 is slid substantially parallel along the bottom surface 20b of the base 20.

  As shown in FIG. 3, a washer 30, a spring cover 29, a spring 28 as a biasing member, a spring receiving portion 27, and a nut 26 are attached to the tip of the penetrating shaft portion 25 d that penetrates the guide hole 20 d of the base 20. It is done. The nut 26 is screwed to the distal end portion of the penetrating shaft portion 25 d, whereby the blade edge plate 25 is attached to the base 20.

  The washer 30, the spring cover 29, the spring 28, and the spring receiving portion 27 are annular members arranged so that the through shaft portion 25d penetrates the through shaft portion 25d so as not to prevent the vertical movement of the through shaft portion 25d. It is arranged on the outer periphery of 25d.

  Of these, the spring cover 29 is a member that is attached so as to cover the outer periphery of the spring 28, and when the blade shaft 25 is lifted from the bottom surface 20 b of the base 20 by pushing the penetrating shaft portion 25 d as will be described later, It also functions as a cushioning material that receives the force that pushes the penetrating shaft portion 25d and prevents the spring 28 from being damaged. Further, it is possible to prevent the blade edge plate 25 from riding on the bottom surface 20 b of the base 20.

  The spring 28 is compressed and attached so as to be sandwiched between the washer 30 and the spring receiving portion 27. At this time, since the washer 30 is disposed on the upper surface of the base 20 and the spring receiving portion 27 is disposed on the lower surface of the nut 26, the spring 28 urges the nut 26 in a direction away from the base 20. In other words, the urging force of the spring 28 biases the nut 26 and the blade edge plate 25 coupled to the nut 26 upward, and the blade edge plate 25 is urged in a direction to be pressed against the bottom surface 20 b of the base 20. ing.

  By the way, when the nut 26 is screwed into the penetrating shaft portion 25d, the blade edge plate 25 is dimensionally controlled so that it can move up and down in the axial direction of the penetrating shaft portion 25d with respect to the base 20. However, as described above, the blade edge plate 25 is urged by the urging force of the spring 28 in a direction in which the blade edge plate 25 is pressed against the bottom surface 20b of the base 20, so that the blade edge plate 25 is in close contact with the bottom surface 20b of the base 20 in a natural state. doing.

  FIG. 4 is a bottom view of the base 20 with the blade plate 25 in the standby position. As shown in FIG. 4, the blade edge plate 25 is positioned at the standby position by the positioning piece 25c of the blade edge plate 25 engaging the opening edge of the blade edge 20a.

  The bottom surface 20b of the base 20 is provided with a protrusion 20c as a movement start preventing mechanism for preventing the blade edge plate 25 from moving from the standby position when the blade edge plate 25 is not used. The projection 20c engages with the engaging portion 25a of the blade edge plate 25, so that the sliding of the blade edge plate 25 is restricted, and the unintentional movement of the blade edge plate 25 does not occur.

  By sliding the blade edge plate 25 from this standby position, the size of the opening of the blade edge 20a can be reduced as shown in FIG. In order to slide the blade edge plate 25 from the standby position, it is necessary to release the engagement between the protrusion 20c of the base 20 and the engaging portion 25a of the blade edge plate 25. This is possible by floating from the bottom surface 20 b of the base 20 against the urging force of 28.

  That is, in the standby state, as shown in FIG. 6, the blade edge plate 25 is pressed against the bottom surface 20 b of the base 20 by the biasing force of the spring 28.

  From this state, as shown in FIGS. 7 and 8, if the tip end side of the blade edge plate 25 is pushed in, the blade edge plate 25 moves away from the bottom surface 20 b of the base 20 against the biasing force of the spring 28. . Since the height of the protrusion 20c of the base 20 is set lower than the distance to which the blade plate 25 is pushed and moved, the base plate 20 is lifted from the bottom surface 20b of the base 20 in this manner. The engagement between the projection 20c of 20 and the engagement portion 25a of the blade plate 25 is released, and the engagement portion 25a of the blade plate 25 can get over the projection 20c.

  Although not shown, by providing an operation portion (for example, a knob formed of rubber or the like) for pushing the tip side of the blade plate 25 in the through shaft portion 25d exposed on the upper side of the base 20, The operability of the blade opening plate 25 can be improved.

  When the engaging portion 25a of the blade edge plate 25 gets over the protrusion 20c, the protrusion 20c enters the notch 25b provided at the rear of the engaging portion 25a (see FIG. 5). There is no problem that the blade edge plate 25 is kept in a state where the blade edge plate 25 is lifted up.

  Then, after the engaging portion 25a of the blade edge plate 25 gets over the protrusion 20c, the blade edge plate 25 may be slid and adjusted according to the size of the opening of the blade edge 20a to be set. If the blade plate 25 is slid to an appropriate position, the blade plate 25 is pressed against the base 20 by the urging force of the spring 28, so that the blade plate 25 is held so as not to move due to frictional resistance. Is done.

  As described above, according to this embodiment, the blade edge plate 25 provided near the blade edge 20a of the base 20 and slidable along the bottom surface 20b of the base 20 and the blade edge plate 25 are connected to the base 20. And a spring 28 that is urged so as to be pressed against the bottom surface 20b. For this reason, the blade 28 is always pulled upward by the spring 28, whereby a frictional resistance is generated between the blade 25 and the base 20, and the blade 25 is held so as not to move. According to such a structure, the blade edge plate 25 can be easily adjusted without using a screwdriver or the like by sliding the blade edge plate 25, and the blade edge plate can be continuously stepped by sliding. Since the position adjustment of 25 can be performed, the fine position adjustment of the blade edge plate 25 can be performed.

  Further, since the blade edge plate 25 is pressed against the bottom surface 20 b of the base 20, it is possible to make a structure in which a step is hardly formed between the blade edge plate 25 and the bottom surface 20 b of the base 20.

  In addition, since a movement start prevention mechanism is provided for preventing the blade edge plate 25 from moving out of the standby position when the blade edge plate 25 is not used, the blade edge plate is unintentionally used at the time of inclined cutting. It is possible to reliably prevent an accident such as the movement of 25 and contact with the lower guard 14a.

  Further, the movement start prevention mechanism is a protrusion 20c provided on the bottom surface 20b of the base 20, and the protrusion 20c regulates the sliding of the blade edge plate 25, so that the blade edge plate 25 starts to move from the standby position. When the blade edge plate 25 is slid, the blade edge plate 25 is lifted from the bottom surface 20b of the base 20 against the urging force of the spring 28. Since the projection 20c is formed so as to be able to get over, it is possible to easily release the movement prevention by lifting the blade plate 25.

  Although not shown in detail, the contact surface of the blade edge plate 25 with the protrusion 20c when the blade edge plate 25 is moved to the standby position facilitates the movement of the blade edge plate 25 to the standby position. Therefore, if the blade edge plate 25 is inclined with respect to the moving direction, the standby position returning operation of the blade edge plate 25 is facilitated, and safety can be improved.

  Instead of inclining the contact surface of the blade edge plate 25 with the projection 20c when the blade edge plate 25 is moved to the standby position, or when the blade edge plate 25 is moved to the standby position. In addition to inclining the contact surface of the plate 25 with the protrusion 20c, the blade 25 can be inclined even if the contact surface of the protrusion 20c with the blade edge plate 25 when the blade edge plate 25 is moved to the standby position is inclined. The standby position returning operation of the mouth plate 25 is facilitated and the safety can be improved.

  In the above-described embodiment, the release prevention mechanism is released by lifting the blade plate 25 and getting over the protrusion 20c. However, the present invention is not limited to this, and for example, the protrusion 20c can be moved to the retracted position. It is also possible to cancel the movement prevention by moving the protrusion 20c to the retracted position. As specific examples of enabling the protrusion 20c to move to the retracted position, (1) the protrusion 20c can be slid horizontally along the bottom surface 20b of the base 20, and (2) the protrusion 20c is perpendicular to the bottom surface 20b of the base 20. (3) The protrusion 20c can be rotated in the horizontal direction along the bottom surface 20b of the base 20, and the like.

  In addition to the above-described example, a plunger bolt is provided on the bottom surface 20b of the base 20, and a concave portion that is fitted to the plunger bolt is provided on the blade mouth plate 25. The movement of the mouth plate 25 may be prevented. Similarly, a plunger bolt is provided on the blade mouth plate 25, and a concave portion for fitting the plunger bolt is provided on the bottom surface 20b of the base 20, and the movement of the blade mouth plate 25 is prevented by fitting the plunger bolt and the concave portion. You may make it do.

DESCRIPTION OF SYMBOLS 10 Portable cutting machine 11 Cutting machine main body 12 Motor housing 14 Saw blade 14a Lower guard 15 Grip 16 Trigger 17 Battery mounting part 18 Battery 19 Angle adjustment mechanism 20 Base 20a Blade opening 20b Bottom surface 20c Protrusion (motion start prevention mechanism)
20d guide hole 25 blade plate 25a engaging portion 25b notch portion 25c positioning piece 25d penetrating shaft portion 26 nut 27 spring receiving portion 28 spring (biasing member)
29 Spring cover 30 Washer

Claims (5)

A motor,
A cutting machine body containing the motor;
A saw blade that is rotated by the motor to cut the workpiece;
A base that is provided at a lower portion of the cutting machine main body and abuts on a material to be cut;
A blade edge plate provided near the blade edge of the base and slidable along the base;
An urging member that urges the blade opening plate to press against the base;
The portable cutting machine is characterized in that the blade edge plate is set to be equal to or less than a surface of the base that contacts the material to be cut.   The portable cutting machine according to claim 1, further comprising a movement start prevention mechanism for preventing the blade edge plate from moving from a standby position when the blade edge plate is not used. The movement start prevention mechanism is a protrusion provided on the bottom surface of the base, and the protrusion prevents the blade edge plate from moving from the standby position by restricting the sliding of the blade edge plate,
The protrusion is formed in the thickness direction of the base so that the blade plate can get over when the blade plate is lifted from the bottom surface of the base against the urging force of the urging member. The portable cutting machine according to claim 2, wherein the portable cutting machine is provided.   The blade edge plate is provided with an operation portion on the upper surface side of the base for lifting the blade edge plate from the bottom surface of the base against an urging force to the base. The portable cutting machine in any one of 1-3.   The contact surface of the blade edge plate with the protrusion when the blade edge plate is moved to the standby position, and the blade edge plate at the protrusion when the blade edge plate is moved to the standby position. The at least one of the contact surfaces with the blade is inclined with respect to the moving direction of the blade plate in order to facilitate the movement of the blade plate to the standby position. A portable cutting machine as described in 1.

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