JP2021104617A - Cutting machine - Google Patents

Abstract

To provide a cutting machine capable of transferring into a restriction release state for a tiltable range easily.SOLUTION: When an auxiliary member 60 is attached to a base basic part 30, in a state of a right angle cutting, an abutting part 18c of a bevel plate 18 abuts on an upper surface of a front guide bar 62 of the auxiliary member 60. Further, a bottom surface of a link member 23 abuts on an upper surface of a support bar 64 of the auxiliary member 60. Thus a reverse tilt of a body from the right angle cutting state to a right side relative to the base basic part 30 is restricted. The auxiliary member 60 is removed to allow the reverse tilt of the body. Specifically wing bolts 36, 37 are loosened and the auxiliary member 60 is pulled out of the base basic part 30 to the right side. In addition, when a tilt adjustment lever 19 is loosened, the reverse tilt of the body is allowed.SELECTED DRAWING: Figure 3

Description

The present invention relates to a cutting machine such as a circular saw capable of inclined cutting.

Some cutting machines such as circular saws are capable of inclined cutting. Inclined cutting is the work of changing the angle of the cutting blade with respect to the surface of the work material to a value other than 90 degrees. In tilted cutting, the cutting edge is often tilted in only one direction with respect to 90 degrees. However, in the cutting work, there is also reverse tilt cutting performed by tilting the cutting blade in the opposite direction. Reverse slope cutting is performed, for example, when cutting near the wall of a house. This aspect of work is sometimes referred to as cutting. The following Patent Document 1 discloses a circular saw that can be cut off by removing the sub-base.

Japanese Unexamined Patent Publication No. 2013-78864

Reverse slope cutting is usually not used much because it is often done in the case of edge cutting. Therefore, in order to prevent an unintentional reverse inclination state, a stopper member for restricting the reverse inclination state may be provided. However, in this case, in addition to the removal of the sub-base, it is necessary to separately release the regulation by the stopper member, and the workability in the reverse tilted state is not good.

An object of the present invention is to provide a cutting machine that can easily shift to a deregulation state for a tiltable range.

One aspect of the present invention is a cutting machine. This cutting machine
With the base
With the housing connected to the base
The motor housed in the housing and
A cutting blade driven by the motor is provided.
A cutting machine capable of changing the angle of the cutting blade with respect to the bottom surface of the base by an inclined support portion.
The base has a base base connected to the housing and an auxiliary member attached to the base base.
The angle range of the cutting blade that can be changed by the inclined support portion is changed according to the mounting state of the auxiliary member with respect to the base base portion.

When the auxiliary member is attached to the base base, the angle of the cutting blade can be changed only in one direction from the reference state where the cutting blade is 90 degrees with respect to the bottom surface of the base, and the auxiliary member is attached. When the member is not attached to the base base, the angle of the cutting blade may be changed in other directions from the reference state.

The angle range of the cutting blade may be limited by a part of the housing coming into contact with the auxiliary member mounted on the base base.

It has a cutting depth adjustment mechanism that can change the amount of protrusion of the cutting blade from the bottom surface of the base.
The cutting depth adjusting mechanism has a link member provided in the housing and connected to the base.
The angle range of the cutting blade may be limited by a part of the link member coming into contact with the auxiliary member.

The contact position between the link member and the auxiliary member may be located between the link member and the bottom surface of the base.

The tilted support includes a bevel stand provided on the base.
The depth of cut adjustment mechanism has a base that is connected to the bevel stand and supported by the housing.
The angle range of the rotatable cutting blade may be changed by abutting the base portion with the auxiliary member.

The base portion and the link member may be arranged at positions separated from each other in the cutting direction of the cutting blade.

Another aspect of the present invention is a cutting machine. This cutting machine
With the base
With the housing connected to the base
The motor housed in the housing and
The cutting blade driven by the motor and
An inclined support portion having a fulcrum axis extending in a direction along the side surface of the cutting blade is provided.
A cutting machine capable of changing the angle of the cutting blade with respect to the bottom surface of the base by rotating the housing with respect to the base about the fulcrum axis.
The base has a base base connected to the housing and an auxiliary member attached to and detached from the base base.
When the auxiliary member is removed from the base base, the rotatable range of the housing with respect to the base is larger than that when the auxiliary member is attached to the base base.

Any combination of the above components and a conversion of the expression of the present invention between methods, systems and the like are also effective as aspects of the present invention.

According to the present invention, it is possible to provide a cutting machine that can easily shift to a deregulation state with respect to a tiltable range.

The plan view of the cutting machine 1 which concerns on embodiment of this invention. A cross-sectional view taken along the line AA of FIG. A perspective view of the main part configuration of the cutting machine 1 as viewed from the rear upper left side. A perspective view of a state in which the auxiliary member 60 is removed from the state of FIG. 3 and separated from the state. A normal cross-sectional view of the cutting machine 1 at right angles. A normal cross-sectional view of a 45-degree inclined cutting machine 1. It is a normal cross-sectional view of the reverse inclination cutting of a cutting machine 1.

In the following, the same or equivalent components, members, etc. shown in the drawings will be designated by the same reference numerals, and redundant description will be omitted as appropriate. The embodiment is not limited to the invention but is an example. Not all features and combinations thereof described in the embodiments are essential to the invention.

The present embodiment relates to a cutting machine 1. 1 and 5 define the front-back, up-down, and left-right directions of the cutting machine 1 that are orthogonal to each other. The front-rear direction is the working direction of the cutting machine 1. The vertical direction is the direction perpendicular to the base base 30. The left-right direction is defined based on the case of looking at the front direction (cutting progress direction). The cutting machine 1 is a cordless type portable circular saw (portable cutting machine).

The cutting machine 1 includes a main body 10, a base base 30, and an auxiliary member 60. The base base 30 and the auxiliary member 60 form the base of the cutting machine 1. Both the base base 30 and the auxiliary member 60 are made of a metal such as aluminum. The longitudinal direction of the base base 30 coincides with the working direction of the cutting machine 1. The bottom surface of the base base 30 and the auxiliary member 60 is a sliding surface with a work material (processed material). The main body 10 is connected to the base base 30. The housing (outer shell) of the main body 10 includes a motor housing 11, a handle housing 12, and a gear cover (saw cover) 13 that are combined and integrated with each other.

The motor housing 11 is, for example, a resin molded body, and houses the motor 6 inside. The motor 6 is an inner rotor type brushless motor. The inverter circuit board 44 is provided on the left side of the stator of the motor 6. The inverter circuit board 44 is substantially perpendicular to the output shaft 6a. A plurality (for example, six) of switching elements 44a such as FETs and IGBTs are mounted on the inverter circuit board 44.

The handle housing 12 is, for example, a resin molded body having a left-right two-divided structure. The handle housing 12 is connected to the motor housing 11 and the gear cover 13. The handle housing 12 is provided with an operation panel 17. Although not shown, the operation panel 17 is provided with a switch for switching the operation mode of the cutting machine 1 and whether or not the light is turned on, LEDs for displaying various statuses, and the like. The grip portion of the handle housing 12 is provided with a trigger portion (operation portion) (not shown) for the user to switch between driving and stopping the motor. A battery pack 51, which serves as a power source, is slidably attached to the rear end of the handle housing 12 from the rear.

The gear cover 13 is made of metal such as aluminum. The gear cover 13 covers the speed reduction mechanism 8 that decelerates the rotation of the motor 6 and transmits it to the saw blade (cutting blade) 16, and also covers the upper half of the saw blade 16. A protective cover 15 is rotatably attached to the gear cover 13. The protective cover 15 is, for example, a resin molded body, and covers the lower half of the saw blade 16 so as to be openable and closable. The saw blade 16 as a cutting blade is a disk-shaped rotary blade, which is rotationally driven by a motor 6. The saw blade 16 projects downward from the lower surface of the base base 30.

The main body 10 can swing in the vertical direction with respect to the base base 30 by the cutting depth adjusting mechanism. When the swing of the main body 10 is changed, the amount of protrusion of the saw blade 16 from the bottom surface of the base base 30 is changed. The cutting depth adjusting mechanism includes a link member 23 and a cutting depth adjusting lever 24. The link member 23 is a metal such as aluminum. The link member 23 is interposed between the base base 30 and the gear cover 13. The link member 23 is connected to a guide portion 23a having an arcuate hole portion, an extending portion 23b extending rearward from the lower portion of the guide portion 23a, and a rear portion of the extending portion 23b, and extends in the left-right direction to form a base. It has a connecting portion 23c connected to the base portion 30. The link member 23 is connected to the base base 30 by the support shaft 23d shown in FIG. 5, and when the main body 13 is tilted with respect to the base base 30, the link member 23 rotates with the support shaft 23d as a fulcrum. It is designed to do. By providing the link member 23, the cutting depth adjusting lever 24 is loosened to weaken the fixing force between the guide portion 23a and the main body 10, so that the base base 30 is supported by the bevel plate 18 with respect to the main body 10. The main body 10 can be swung (rotated) around the position. Further, by tightening the cutting depth adjusting lever 24, the swing position of the main body 10 with respect to the base base 30 can be fixed.

The main body 10 can be tilted in the left-right direction with respect to the base base 30. Hereinafter, a specific description will be given. As shown in FIGS. 1, 3 and 4, the base base portion 30 has a bottom surface portion 31, a bevel stand portion 32, and insertion portions 33 to 35. A bevel stand portion 32 is erected at the front end portion of the bottom surface portion 31. The bevel stand portion 32 has an elongated hole 32a penetrating in the front-rear direction. The elongated hole 32a is an arc-shaped through hole centered on the fulcrum shaft 21. The insertion portions 33 to 35 are portions through which the front guide bar 62 and the rear guide bar 63 of the auxiliary member 60 are inserted. The insertion portion 34 is provided with a wing bolt 36 for fixing the front guide bar 62. The insertion portion 35 is provided with a wing bolt 37 for fixing the rear guide bar 63.

A bevel plate 18 is interposed between the front end portion of the gear cover 13 and the bevel stand portion 32. The bevel plate 18 forms a part of the housing of the main body 10. The bevel plate 18 is a metal such as aluminum. The bevel plate 18 includes a swing support portion 18a, a base portion 18b, and a contact portion 18c. The swing support portion 18a has a U shape when viewed in the vertical direction. The swing support portion 18a supports the gear cover 13 so as to be swingable. The base portion 18b has a flat plate shape perpendicular to the front-rear direction. A swing support portion 18a is provided at the upper right end portion of the base portion 18b. The base portion 18b is rotatably connected to the base base portion 30 by a fulcrum shaft 21 and a movable shaft 22. The contact portion 18c has a right angle adjusting screw 25 and extends rearward from the lower end portion of the left side portion of the base portion 18b. The fulcrum shaft 21 is a fixed shaft parallel to the front-rear direction. The fulcrum shaft 21 rotatably supports the lower right side of the base portion 18b. The movable shaft 22 is a shaft that can be moved along the elongated hole 32a of the bevel stand portion 32. By loosening the tilt adjusting lever 19, the movable shaft 22 can move along the elongated hole 32a, and the bevel plate 18 rotates about the center of the fulcrum shaft 21 (tilt shaft B), that is, with respect to the base base 30. The main body 10 can be tilted. By tightening the tilt adjusting lever 19, the movable shaft 22 is fixed in the elongated hole 32a, and the rotation position of the bevel plate 18, that is, the tilt position of the main body 10 with respect to the base base 30 is determined. The bevel plate 18, the tilt adjusting lever 19, and the bevel stand portion 32 form an tilt support portion.

The auxiliary member 60 includes a longitudinal portion 61, a front guide bar 62, a rear guide bar 63, and a support bar 64. The longitudinal portion 61 is a portion extending in the front-rear direction. The front guide bar 62 extends to the left from the front end of the longitudinal portion 61. The front guide bar 62 is inserted through the insertion portions 33 and 34 of the base base 30. The rear guide bar 63 extends to the left from the rear end of the longitudinal portion 61. The rear guide bar 63 is inserted into the insertion portion 35 of the base base 30. The support bar 64 extends to the left from a portion near the rear end of the longitudinal portion 61. The position of the support bar 64 in the front-rear direction is within the range of existence of the bottom surface of the link member 23 in the front-rear direction. The support bar 64 passes below the bottom surface of the link member 23 and extends to the left of the bottom surface. The lower end of the support bar 64 is supported by the bottom surface 31 of the base base 30 on the left side of the bottom surface of the link member 23. The front guide bar 62 and the rear guide bar 63 are inserted into the insertion portions 33 to 35 of the base base 30 to tighten the wing bolts 36 and 37, and the auxiliary member 60 is attached and fixed to the base base 30. By loosening the wing bolts 36 and 37 to weaken the fixing force of the auxiliary member 60 to the base base 30, the auxiliary member 60 can be removed from the base base 30 as shown in FIG.

1 to 3 and 5 show a reference state in which the saw blade 16 is perpendicular to the bottom surface of the base base 30, that is, a right-angle cutting state. In order to make it easier to understand the positional relationship between the link member 23 and the support bar 64 in FIG. 5, the position of the cutting depth adjusting lever 24 is set to about the middle of the guide portion 23a in FIGS. 3 and 5, and the cutting depth is set to about the middle of the guide portion 23a. The liver is shallow. When the auxiliary member 60 is attached to the base base 30, in the right-angle cutting state, the contact portion 18c (right-angle adjustment screw 25) of the bevel plate 18 is a front guide of the auxiliary member 60 as shown in FIGS. 2 and 3. It abuts on the upper surface of the bar 62. Therefore, the main body 10 is restricted from being cut at a right angle to the base base 30 to the left (hereinafter, also referred to as “reverse inclination”). Further, since the connecting portion 23c of the link member 23 has a shape extending to the left from the position of the tilting shaft B, the bottom surface of the link member 23 (extending portion 23b) sinks downward during reverse tilting. At this time, since the support bar 64 of the auxiliary member 60 comes into contact with the upper surface of the link member 23, the reverse inclination is also restricted. On the other hand, as shown in FIG. 6, the main body 10 can be tilted to the right from the state of being cut at a right angle to the base base 30. In order to reversely tilt the main body 10, the auxiliary member 60 is removed. Specifically, by loosening the wing bolts 36 and 37 and pulling out the auxiliary member 60 from the base base 30 to the right, the contact state between the contact portion 18c and the guide bar 62, and the link member 23 and the support bar 64 Release the contact state with. If the tilt adjusting lever 19 is loosened on that basis, the link member 23 can be sunk and the main body 10 can be reversely tilted as shown in FIG. In this way, depending on the mounting state of the auxiliary member 60 with respect to the base base 30, specifically, with or without mounting, the tiltable angle range of the main body 10 with respect to the base base 30, that is, the tilt of the saw blade 16 with respect to the bottom surface of the base base 30. The possible angle range is changed. By inclining the main body 10 in the reverse direction as shown in FIG. 7, the work material 3 can be cut in the vicinity of the wall 4. With the auxiliary member 60 mounted on the base base 30, the right-angled adjusting screw 25 provided on the abutting portion 18c of the bevel plate 18 can be moved up and down to finely adjust the right-angled state of the saw blade 16. Is.

According to this embodiment, the following effects can be obtained.

(1) When the auxiliary member 60 is attached to the base base 30, the contact portion 18c of the bevel plate 18 contacts the upper surface of the front guide bar 62 of the auxiliary member 60, and the bottom surface of the link member 23 is the auxiliary member. The structure is such that the reverse inclination of the main body 10 is regulated by abutting on the upper surface of the support bar 64 of the 60. That is, the range in which the removable auxiliary member can be tilted is regulated. Therefore, it is not necessary to provide a stopper member for regulating the reverse inclination separately from the auxiliary member 60, and the number of parts can be reduced. Further, since the regulation of reverse inclination can be released by pulling out the auxiliary member 60 from the base base 30, it is not necessary to operate the stopper member separately from the pulling out of the auxiliary member 60, and it is easy to shift from the reference state to the reverse inclination state. It becomes.

(2) When the auxiliary member 60 is attached to the base base 30, the bottom surface of the link member 23 is supported by the support bar 64 in right-angle cutting. Therefore, it is possible to suppress the sinking of the link member 23 when the operator puts his / her weight on the main body 10 from above. Therefore, it is possible to prevent the saw blade 16 from being displaced and the cutting accuracy from being deteriorated.

(3) The right-angled adjusting screw 25 provided on the abutting portion 18c of the bevel plate 18 enables fine adjustment of the right-angled state of the saw blade 16 and is highly convenient.

Although the present invention has been described above by taking the embodiment as an example, it will be understood by those skilled in the art that various modifications can be made to each component and each processing process of the embodiment within the scope of the claims. By the way. The cutting machine 1 may be a corded type that operates with power supplied from an external AC power source. The support bar 64 may be omitted from the auxiliary member 60. In this case, the effect of suppressing the sinking of the link member 23 is lost, but the point that the transition to the reverse inclination state is easy remains unchanged. Although the auxiliary member 60 is an auxiliary base having a bottom surface parallel to the bottom surface of the base base 30, it may be a right-angled ruler for performing right-angle cutting. The motor 6 may be a brushed motor. The component that comes into contact with the auxiliary member 60 may be another part of the housing that moves when tilted.

1 Cutting machine, 3 Work material (processed material), 4 wall, 6 motor (electric motor), 6a output shaft, 8 reduction mechanism, 10 main body, 11 motor housing, 12 handle housing, 13 gear cover (saw cover), 15 protection Cover, 16 saw blade (cutting blade), 17 operation panel, 18 bevel plate, 18a swing support, 18b base, 18c contact, 19 tilt adjustment lever, 21 fulcrum shaft, 22 movable shaft, 23 link member, 24 Cutting depth adjustment lever, 25 Right angle adjustment screw, 30 Base base, 31 Bottom part, 32 Bevel stand part, 32a long hole, 33-35 insertion part, 36, 37 wing bolt, 44 Inverter circuit board, 44a switching Element, 51 Battery pack, 60 Auxiliary member (sub-base), 61 Longitudinal part, 62 Front guide bar, 63 Rear guide bar, 64 Support bar.

Claims (8)

With the base
With the housing connected to the base
The motor housed in the housing and
A cutting blade driven by the motor is provided.
A cutting machine capable of changing the angle of the cutting blade with respect to the bottom surface of the base by an inclined support portion.
The base has a base base connected to the housing and an auxiliary member attached to the base base.
A cutting machine in which the angle range of the cutting blade that can be changed by the inclined support portion is changed according to the mounting state of the auxiliary member with respect to the base base portion. When the auxiliary member is attached to the base base, the angle of the cutting blade can be changed only in one direction from the reference state in which the cutting blade is 90 degrees with respect to the bottom surface of the base, and the auxiliary member can be changed. The cutting machine according to claim 1, wherein when the member is not attached to the base base, the angle of the cutting blade can be changed in other directions from the reference state. The cutting machine according to claim 1 or 2, wherein the angle range of the cutting blade is limited by a part of the housing coming into contact with the auxiliary member mounted on the base base. It has a cutting depth adjustment mechanism that can change the amount of protrusion of the cutting blade from the bottom surface of the base.
The cutting depth adjusting mechanism has a link member provided in the housing and connected to the base.
The cutting machine according to any one of claims 1 to 3, wherein the angle range of the cutting blade is limited by a part of the link member coming into contact with the auxiliary member. The cutting machine according to claim 4, wherein the contact position between the link member and the auxiliary member is located between the link member and the bottom surface of the base. The tilted support includes a bevel stand provided on the base.
The depth of cut adjustment mechanism has a base that is connected to the bevel stand and supported by the housing.
The cutting machine according to claim 4 or 5, wherein when the base portion and the auxiliary member come into contact with each other, the angle range of the rotatable cutting blade is changed. The cutting machine according to claim 6, wherein the base portion and the link portion are arranged at positions separated from each other in the cutting direction of the cutting blade. With the base
With the housing connected to the base
The motor housed in the housing and
The cutting blade driven by the motor and
An inclined support portion having a fulcrum axis extending in a direction along the side surface of the cutting blade is provided.
A cutting machine capable of changing the angle of the cutting blade with respect to the bottom surface of the base by rotating the housing with respect to the base about the fulcrum axis.
The base has a base base connected to the housing and an auxiliary member attached to and detached from the base base.
A cutting machine having a large rotatable range of the housing with respect to the base when the auxiliary member is removed from the base base as compared with the case where the auxiliary member is attached to the base base.

Images