JP2020192782A - Portable cutting machine - Google Patents

Abstract

To provide a fine adjustment mechanism that is satisfactory in operability, in a portable cutting machine having the fine adjustment mechanism capable of finely adjusting an inclination angle at which a cutting machine body is positioned, by solving a problem in that, when the inclination angle of the portable cutting machine is finely adjusted, it is difficult to perform a fine adjustment operation while checking the inclination of a blade tool from front or behind.SOLUTION: In an upper-surface front part of a base 2, an angular plate 51 is provided, by which a bracket 53 coupled to a cutting-machine body is supported so as to be sideways inclinable. The angular plate 51 comprises an inclination switch mechanism 52 capable of switching the maximum inclination angle of the bracket 53. The inclination switch mechanism 52 comprises: a stopper portion 53a; and a locking portion 54 that regulates inclination of the bracket 53 at the maximum inclination angle by coming into contact with the stopper portion 53a. A fine adjustment operation unit 57a for a fine adjustment mechanism 57 that finely adjusts the position of a contact area 54c of the locking portion 54 is provided ahead of the angular plate 51.SELECTED DRAWING: Figure 11

Description

The present invention relates to a portable cutting machine used for cutting a material to be cut such as wood.

This type of portable cutting machine includes a base placed on the upper surface of the material to be cut and a cutting machine body supported on the upper surface of the base. The main body of the cutting machine is provided with a cutting tool that is driven by an electric motor as a drive source. Cutting can be performed by protruding the cutting tool toward the lower surface side of the base and cutting it into the material to be cut. The cutting machine body is tilted with respect to the base so that the cutting tool is tilted from a posture perpendicular to the material to be cut. As a result, the material to be cut can be cut so-called inclined. The tilt angle of the cutting machine body can be adjusted manually. Further, a positive stop mechanism having a stopper for locking the tilt of the cutting machine main body at a relatively frequently used predetermined angle such as 45 ° is provided. The positive stop mechanism makes it possible to easily position the cutting machine body at a predetermined angle such as 45 ° without making any special adjustment.

The positive stop mechanism is provided with a portable cutting machine equipped with a tilt switching mechanism capable of changing the position of the stopper to a plurality of places. The tilt switching mechanism includes, for example, a dial-type switching operation unit and a plunger. The switching operation unit to be rotated is positioned by a plunger at a predetermined plurality of angles. By positioning the switching operation unit at a plurality of angles, the stopper is also positioned at a plurality of locations. As a result, the stopper locks the tilt of the cutting machine main body at a plurality of predetermined tilt angles that are relatively frequently used, such as 45 ° and 22.5 °.

Conventionally, there has been a demand for a positive stop mechanism provided with a fine adjustment mechanism capable of finely adjusting the tilt angle. In Patent Document 1, a hexagonal bar wrench or the like is inserted into an adjusting screw provided on the side of a guide plate (angular plate) from diagonally above and rotated, so that the cutting machine body is locked by a stopper. A fine adjustment mechanism that enables fine adjustment of the angle is described. According to Patent Document 2, the 45 ° position where the cutting machine body is locked can be finely adjusted by inserting a hexagon wrench or the like into a 45 ° positioning stopper provided on the lower surface of the base and rotating the machine. The fine adjustment mechanism to be used is described.

Japanese Unexamined Patent Publication No. 2001-54816 Japanese Unexamined Patent Publication No. 2016-64467

The fine adjustment mechanism of the positive stop mechanism that has been provided conventionally has room for improvement in operability and the like. For example, when confirming the finely adjusted inclination angle, the inclination of the cutting tool is visually recognized from the front or the back of the cutting tool. However, in the case of the conventional configuration as described in Patent Documents 1 and 2, the operation direction of the operation unit intersects with the front-rear direction in which the cutting tool is visually recognized. Therefore, it may be difficult to perform a fine adjustment operation at the same time while checking the inclination of the cutting tool.

An object of the present invention is to provide a fine adjustment mechanism having good operability in a portable cutting machine provided with a fine adjustment mechanism capable of finely adjusting the tilt angle at which the cutting machine main body is positioned.

According to one feature of the present disclosure, the portable cutting machine includes a base that comes into contact with the material to be cut, and a cutting machine main body that is supported on the upper surface of the base and has a cutting tool. Cutting can be performed by projecting the cutting tool to the lower surface side of the base and cutting it into the material to be cut. An angular plate is provided on the upper surface of the base to support the cutting machine body so as to be tiltable in the left-right direction in front of or behind the cutting machine body. The angular plate is provided with an inclination switching mechanism capable of switching the maximum inclination angle of the cutting machine body in the left-right direction. The tilt switching mechanism includes a stopper portion and a locking portion that comes into contact with the stopper portion and regulates the tilt of the cutting machine main body at the maximum tilt angle. The portable cutting machine is provided with a fine adjustment mechanism for finely adjusting the position of the contact portion of the locking portion that comes into contact with the stopper portion. A fine adjustment operation unit of the fine adjustment mechanism is provided in front of or behind the angular plate.

Therefore, when viewed from the operator, the fine adjustment operation unit is arranged along the front-rear direction in which the inclination of the cutting tool is visually recognized. Therefore, it is possible to easily operate the fine adjustment operation unit at the same time while checking the inclination of the cutting tool. Thus, it is possible to provide a fine adjustment mechanism having good operability.

According to another feature of the present disclosure, the tilt switching mechanism includes a switching operation unit on the front surface or the rear surface of the angular plate. A fine adjustment operation unit is provided in the switching operation unit.

Therefore, the switching operation unit and the fine adjustment operation unit are collectively arranged in the inclination switching mechanism along the front-rear direction in which the inclination of the cutting tool is visually recognized. Therefore, for example, after operating the switching operation unit, the operation of the fine adjustment operation unit can be smoothly performed. As a result, the operability of the tilt switching mechanism including the fine adjustment operation unit is improved.

According to another feature of the present disclosure, the fine adjustment operation unit can be rotated about a rotation axis parallel to the front-rear direction. By rotating the fine adjustment operation unit, the position of the contact portion is finely adjusted.

Therefore, it is possible to rotate the fine adjustment operation unit at the same time while checking the inclination of the cutting tool, and it is easy to check the degree of the rotation operation. Further, the rotation operation is easier to make fine adjustments with higher accuracy than, for example, a push operation. Therefore, the operability of the fine adjustment mechanism is improved.

According to other features of the present disclosure, the locking portion comprises a pin. The axis of the pin is parallel to the axis of rotation and eccentric with respect to the axis of rotation. The fine adjustment mechanism has a structure in which the position of the pin is displaced by the rotation operation of the fine adjustment operation unit.

Therefore, the fine adjustment mechanism can be provided with a simple structure. Further, the pin is relatively displaced around the rotation axis, and the pin is not directly moved with respect to the fine adjustment mechanism, for example. Therefore, the accuracy of the fine adjustment mechanism at the time of shipment of the product can be maintained.

According to another feature of the present disclosure, a tool engaging hole for inserting and engaging a tool is provided at the end of the rotating shaft.

Therefore, the end portion of the rotating shaft can be provided so as not to protrude forward or backward. Therefore, the portable cutting machine can be made compact in the front-rear direction.

According to another feature of the present disclosure, the portable cutting machine includes a base that is brought into contact with the material to be cut, and a cutting machine main body that is supported on the upper surface of the base and has a cutting tool. Cutting can be performed by projecting the cutting tool to the lower surface side of the base and cutting it into the material to be cut. The cutting machine body is provided with an angular guide in which the front part and the rear part are integrated. Angular plates that slidably engage with the angular guide to support the cutting machine body so as to be tiltable in the left-right direction are provided on the front and rear portions of the upper surface of the base. The angular plate is provided with an inclination switching mechanism capable of switching the maximum inclination angle of the cutting machine body in the left-right direction. The angular guide is provided with a fine adjustment mechanism that is movable up and down so that the maximum tilt angle can be finely adjusted.

Therefore, even in a portable cutting machine that does not have a tilting support shaft, the maximum tilt angle of the cutting machine body can be finely adjusted with high accuracy. In the case of this type of portable cutting machine, a gap is provided between the engaging portion where the angular plate and the angular guide engage with each other in a direction intersecting the left-right tilting direction in order to ensure slidability. There is. In the case of a portable cutting machine provided with a tilting support shaft, tilting is supported by two points, the tilting support shaft and the contact portion, but the tilting support shaft creates a radial gap in the cutting machine body. Since it is almost eliminated, even if the contact portion for positioning in the tilting direction becomes somewhat unstable, the accuracy of the tilting mechanism is not adversely affected. Therefore, in this type of portable cutting machine, even if a fine adjustment mechanism having a contact portion is provided on an angular plate having a small space, there is little problem. On the other hand, in the type without the tilting support shaft, the fine adjustment mechanism having the contact portion is not provided on the angular plate side, but is provided on the angular guide side where a large space can be taken, so that the mounting state of the contact portion can be adjusted. You can make it firm. As a result, it becomes easy to obtain accuracy by fine adjustment by the fine adjustment mechanism. Moreover, the fine adjustment mechanism is operated so as to operate in a direction substantially orthogonal to the left-right tilt direction (vertical direction) with respect to the angular guide (cutting machine main body) that tilts left and right. Therefore, the fine adjustment mechanism is easy to operate with the cutting machine main body tilted left and right, and has good operability.

According to another feature of the present disclosure, the tilt switching mechanism includes a switching operation unit on the front surface or the rear surface of the angular plate. The switching operation unit is provided with a locking unit. The fine adjustment mechanism has a stopper surface that can come into contact with the locking portion and can move in the vertical direction on the front surface of the angular guide facing the angular plate.

Therefore, the contact position between the locking portion and the stopper surface is finely adjusted in the vertical direction. This vertical direction is along the direction of closing the gap provided in the engaging portion where the angular guide and the angular plate engage with each other. Moreover, the contact position between the locking portion and the stopper surface is near the engaging portion between the angular guide and the angular plate. Therefore, fine adjustment by the fine adjustment mechanism can more accurately suppress variations in the maximum tilt angle of the cutting machine body due to the gap. As a result, the accuracy of fine adjustment can be improved while improving the operability of the fine adjustment mechanism.

According to another feature of the present disclosure, the fine adjustment mechanism is provided with a tool engagement hole on the rear side of the angular guide to which a tool can be inserted and engaged.

Therefore, by engaging the tool with the tool engaging hole, the fine adjustment mechanism can be easily operated while visually recognizing both the inclination of the cutting tool and the operating portion of the tool. Therefore, the operability of the fine adjustment mechanism is improved. Further, by enabling the fine adjustment mechanism to be operated with a tool that can be removed from the tool engagement hole, the fine adjustment mechanism can be provided compactly.

It is an overall perspective view of the portable cutting machine which concerns on 1st Embodiment. It is a right side view of the portable cutting machine which concerns on 1st Embodiment. It is a top view of the portable cutting machine which concerns on 1st Embodiment. It is a front view of the portable cutting machine which concerns on 1st Embodiment. It is an exploded perspective view of the base and the front side tilting support part which concerns on 1st Embodiment. It is a perspective view of the bracket which concerns on 1st Embodiment. It is a perspective view which looked at the switching operation dial which concerns on 1st Embodiment from the front side. It is a perspective view which looked at the switching operation dial which concerns on 1st Embodiment from the rear side. It is a rear view of the switching operation dial seen from the arrow IX direction in FIG. FIG. 3 is a cross-sectional view taken along the line XX in FIG. 3, which is a vertical cross-sectional view of the front tilting support portion according to the first embodiment. FIG. 3 is a cross-sectional view taken along the line XI-XI in FIG. 3, which is a rear view of the front tilting support portion when the bracket is tilted to the right up to an tilting angle of 45 ° set by the tilt switching mechanism. FIG. 3 is a cross-sectional view taken along the line XI-XI in FIG. 3, which is a rear view of the front tilting support portion when the bracket is tilted to the right up to an tilting angle of 22.5 ° set by the tilt switching mechanism. FIG. 3 is a cross-sectional view taken along the line XI-XI in FIG. 3, which is a rear view of the front tilting support portion when the bracket is tilted to the right up to an tilting angle of 60 ° set by the tilt switching mechanism. It is a top view of the portable cutting machine which concerns on 2nd Embodiment. It is a top view of the portable cutting machine which concerns on 2nd Embodiment, and is the top view which tilted the cutting machine main body by 45 ° to the right. It is a right side view of the portable cutting machine which concerns on 2nd Embodiment including the exploded view of the front side tilting support part. It is an exploded perspective view of the front side tilting support part of the portable cutting machine which concerns on 2nd Embodiment. FIG. 14 is a cross-sectional view taken along the line XVIII-XVIII in FIG. 14, which is a vertical cross-sectional view of the portable cutting machine according to the second embodiment. FIG. 14 is a cross-sectional view taken along the line XIX-XIX in FIG. 14, which is a vertical cross-sectional view of the front tilting support portion according to the second embodiment. FIG. 15 is a cross-sectional view taken along the line XX-XX in FIG. 15, which is a vertical cross-sectional view of the front tilting support portion according to the second embodiment.

[First Embodiment]
Next, the first embodiment of the present invention will be described with reference to FIGS. 1 to 13. As shown in FIG. 2, the portable cutting machine 1 of the first embodiment is called a portable round saw, and has a rectangular flat plate-shaped base 2 placed on a material W to be cut and a cutting machine main body 10. I have. The cutting machine main body 10 is supported on the upper surface of the base 2 via the front tilting support portion 3 and the rear tilting support portion 4. The cutting machine main body 10 rotatably supports a substantially disk-shaped cutting tool 11. The cutting tool 11 has a lower side of the cutting tool 11 protruding toward the lower surface side of the base 2 through a window portion 2a provided on the base 2. The cutting tool 11 protruding from the lower surface side of the base 2 is cut to cut the material W to be cut. The cutting machine main body 10 is provided with a handle portion 30 to be gripped by the user. The user can proceed with the cutting process by grasping the handle portion 30 located on the left side of the portable cutting machine 1 in FIG. 2 and moving it to the right. In the following description, regarding the front-rear direction of the member and the structure, the direction in which the portable cutting machine 1 is moved and the cutting process proceeds is the front side, and the user side is the rear side. In addition, the left-right direction of the member and the structure is used with reference to the user.

As shown in FIG. 2, the front tilting support portion 3 is composed of an angular plate 51 integrally connected to the base 2 and a bracket 53 integrally connected to the cutting machine main body 10. The angular plate 51 and the bracket 53 will be described in detail later. As shown in FIG. 5, the rear tilting support portion 4 is supported by the base 2 and includes a left / right tilting support shaft 6 extending in the front-rear direction. The rear main body support portion 59 is supported on the left / right tilt support shaft 6 of the rear tilt support portion 4 so as to be tiltable to the left / right. The rear main body support portion 59 is provided integrally with the depth guide 7 described later.

As shown in FIG. 3, the front tilting support portion 3 and the rear tilting support portion 4 have a configuration for tilting the cutting machine main body 10 with respect to the base 2. The cutting machine main body 10 is supported so as to be tiltable to the left and right about the left and right tilt support shaft 6. The left-right tilt support shaft 6 is coaxial with each other in the front tilt support portion 3 and the rear tilt support portion 4. By tilting the cutting machine main body 10 to the left and right, it is possible to perform tilt cutting in which the cutting tool 11 is tilted with respect to the lower surface of the base 2.

As shown in FIG. 2, the cutting machine main body 10 is provided with a fixed cover 15 that covers a range substantially half of the upper side of the cutting tool 11. On the right side surface of the fixed cover 15, a white arrow 15a indicating the rotation direction of the cutting tool 11 is displayed. A dust collecting nozzle 15b that opens rearward is provided at the rear portion of the fixed cover 15. The dust collecting nozzle 15b can be connected to a separately prepared dust collector via a hose or the like. Chips generated by the cutting tool 11 cutting the material W to be cut can be discharged from the inside of the fixed cover 15 through the dust collecting nozzle 15b.

As shown in FIG. 2, the lower half circumference of the cutting tool 11 can be covered with the movable cover 16. The movable cover 16 is supported so as to be openable and closable in the circumferential direction of the cutting tool 11, and is spring-urged in the closing direction (counterclockwise in FIG. 2). When the movable cover 16 is closed by the force of the spring, the movable cover 16 covers the lower half circumference of the cutting tool 11. When the movable cover 16 is opened clockwise in FIG. 2 against the force of the spring, the peripheral edge portion (blade edge) of the cutting tool 11 is exposed. In normal cutting work, the front end of the movable cover 16 is brought into contact with the end of the material W to be cut, and by moving the portable cutting machine 1 to the front side in the contacted state, the movable cover 16 becomes its spring-loaded force. It gradually opens against it. An opening / closing lever 16a is provided on the right side of the movable cover 16. The user can grasp the opening / closing lever 16a and forcibly open / close the movable cover 16 by manual operation.

As shown in FIG. 3, a vertical swing support shaft 5 is provided behind the front tilt support portion 3. The cutting machine main body 10 can be swung up and down about the vertical swing support shaft 5. By changing the vertical swing position of the cutting machine main body 10 with respect to the base 2, the protrusion dimension of the cutting tool 11 (see FIG. 2) to the lower surface side of the base 2 can be changed, whereby the material to be cut of the cutting tool 11 can be changed. The depth of cut with respect to W can be adjusted.

As shown in FIG. 3, a depth guide 7 for adjusting the depth of cut is attached to the left side of the fixed cover 15. As shown in FIG. 5, the depth guide 7 extends in an arc shape in the circumferential direction of the vertical swing support shaft 5. The depth guide 7 is provided with a bolt guide hole 7a which is an elongated hole which is opened in the left-right direction and extends in an arc shape along the extending direction of the depth guide 7. As shown in FIG. 3, the depth guide 7 is fastened to the left side portion of the fixing cover 15 by the fixing bolt 7c through the bolt guide hole 7a (see FIG. 5). The fixing bolt 7c is loosened by rotating the fixing lever 7d upward, and is tightened by rotating the fixing lever 7d downward. On the left side of the fixed cover 15, a depth scale 15c indicating the depth of cut is marked. The depth guide 7 is engraved with one groove-shaped scale indicating portion 7b. The cutting machine main body 10 is swung up and down with the fixing bolt 7c loosened, and the fixing bolt 7c is tightened in a state where the cutting depth indicated by the depth scale 15c and the scale indicating portion 7b are in the same vertical position. As a result, the material W to be cut can be cut at the cutting depth indicated by the depth scale 15c.

As shown in FIG. 3, a gear housing 25 is provided on the left side of the fixed cover 15. The gear housing 25 and the fixed cover 15 are integrally formed of a metal material such as aluminum. A motor housing 20 having a substantially cylindrical shape is screwed to the left side of the gear housing 25. A plurality of intake ports 20a are provided on the left side surface of the motor housing 20. By taking in outside air into the motor housing from the intake port 20a, the electric motor 21 and the controller 22, which will be described later, are cooled.

As shown in FIG. 1, the motor housing 20 houses an electric motor 21 called a DC brushless motor. The controller 22 is housed in the motor housing 20 above the electric motor 21. The controller 22 is a resin-molded controller in which a control board is housed in a case having a shallow rectangular bottom. The controller 22 is housed in a posture in which the thickness direction (short direction) is along the vertical direction. The controller 22 includes a control circuit mainly composed of a microcomputer for controlling the operation of the electric motor 21, a drive circuit composed of an FET that switches the current of the electric motor 21 based on a control signal received from the control circuit, and a drive circuit described later. It is equipped with an auto stop circuit or the like that cuts off the power supply to the electric motor 21 so as not to cause an overdischarge or an overcurrent state depending on the detection result of the state of the battery pack 42.

Although not particularly visible in the figure, the rotational output of the motor shaft of the electric motor 21 is decelerated via a reduction gear train housed in the gear housing 25 and transmitted to a spindle (output shaft) extending in the left-right direction. To. The right end side of the spindle protrudes into the fixed cover 15, and the cutting tool 11 is attached to the protruding portion. As shown in FIG. 2, the cutting tool 11 is sandwiched between the outer flange 12 and the inner flange, which is not visible in the drawing, in the direction perpendicular to the plane (left-right direction) in a posture orthogonal to the spindle. The pinched state of the cutting tool 11 is locked by the fixing bolt 13 tightened to the tip of the spindle. As a result, the cutting tool 11 is fixed to the spindle so that it cannot be displaced in the axial direction and cannot rotate around the axis.

As shown in FIG. 3, a battery base 40 is provided on the left side of the fixed cover 15 and behind the motor housing 20 and the gear housing 25. The battery base 40 has a substantially flat plate shape with the vertical direction in the plate thickness direction, and a battery mounting portion 41 to which two battery packs 42 can be mounted side by side in the front-rear direction is provided on the lower surface side thereof. .. The battery pack 42 is a highly versatile 18V output lithium-ion battery that can be attached to other power tools such as screw tighteners, and can be used as a repetitive power source by removing it from the battery attachment portion 41 and charging it with a separately prepared charger. It can be used. The two battery packs 42 are electrically connected in series and can supply a total of 36 V of electric power to the electric motor 21. Although the 18V output battery is illustrated, it is also possible to connect two 36V output batteries in series to obtain 72V power instead.

As shown in FIG. 1, a handle portion 30 is provided on the upper portion of the cutting machine main body 10. The front end portion of the handle portion 30 is arranged above the motor housing 20 and the gear housing 25. The handle portion 30 extends rearward while extending upward from the front end portion thereof, and the rear end portion is connected to the upper portion of the battery base 40 and is formed in a loop shape extending in the front-rear direction. The rear portion of the handle portion 30 located above the battery base 40 is provided as a grip portion 31 that the user grips by hand when using the portable cutting machine 1. The surface of the grip portion 31 is coated with an elastomer resin layer 31a for preventing slipping. A front handle 34 is provided integrally with the motor housing 20 above the front side of the motor housing 20. The user can move and operate the portable cutting machine 1 by grasping the front handle 34 with one hand and the grip portion 31 with the other hand.

As shown in FIG. 1, a trigger type switch lever 32 is provided on the inner peripheral side of the loop shape above the grip portion 31. When the switch lever 32 is pulled with the fingertip of the hand holding the grip portion 31, the electric motor 21 is activated and the cutting tool 11 is rotated. A lock-off button 33 that can be pushed and operated is provided above the switch lever 32. By pressing the lock-off button 33, the lock-off state of the switch lever 32 is released, and the switch lever 32 can be pulled. The lock-off button 33 prevents an inadvertent pulling operation of the switch lever 32. When the switch lever 32 is pulled, the electric motor 21 is activated and the cutting tool 11 is rotated.

As shown in FIG. 4, the angular plate 51 is fixed to the front portion of the base 2 and has a fan-shaped shape protruding upward. As shown in FIG. 5, a dial mounting portion 51e to which a switching operation dial 55 described later can be mounted is provided at substantially the center of the front surface of the angular plate 51. Around the dial mounting portion 51e, an arc-shaped hole 51a having an arc shape centered on the dial mounting portion 51e and penetrating the angular plate 51 in the front-rear direction is provided. A pin 54a, which will be described later, is movably entered into the arc-shaped hole 51a along the arc shape of the arc-shaped hole 51a. On the front surface of the angular plate 51, around the dial mounting portion 51e, a switching angle scale 51d indicating the maximum tilt angle of the cutting machine main body 10 which is set to be switchable by the switching operation dial 55 is written. A plunger accommodating hole 51f capable of accommodating the plunger 56 is provided on the upper left side of the dial mounting portion 51e on the front surface of the angular plate 51. The plunger 56 is composed of a ball 56a and a compression spring 56b. The compression spring 56b is accommodated in the plunger accommodating hole 51f, and the ball 56a is accommodated in the plunger accommodating hole 51f so as to be located in front of the compression spring 56b. As a result, the ball 56a is urged forward by the compression spring 56b.

As shown in FIG. 5, the left side portion of the angular plate 51 extends in an arc shape along the arcuate outer shape of the left side portion of the angular plate 51, and the lever shaft guide hole 51b penetrates the angular plate 51 in the front-rear direction. Is provided. An inclination angle scale 51c indicating an inclination angle of the cutting machine main body 10 is marked on the left side surface of the cylindrical surface of the angular plate 51. The front tilt support portion 3 is provided with a tilt switching mechanism 52 capable of switching the maximum tilt angle in the left-right direction of the cutting machine main body 10. The inclination switching mechanism 52 is composed of a switching operation dial (switching operation unit) 55 attached to the front surface of the angular plate 51 and a bracket 53 provided behind the angular plate 51 and connected to the cutting machine main body 10.

As shown in FIG. 6, the bracket 53 is provided with a left-right tilting shaft hole 53e penetrating in the front-rear direction on the right side portion. The left-right tilt support shaft 6 shown in FIG. 5 is inserted into the left-right tilt shaft hole 53e. The left-right tilt support shaft 6 is integrally connected to the angular plate 51. The bracket 53 is supported by the angular plate 51 so as to be tiltable in the left-right direction about the left-right tilt support shaft 6. The bracket 53 is provided with a front main body support portion 53f that supports the cutting machine main body 10 on the left side portion. The front main body support portion 53f has a substantially U-shape with the rear side open when viewed from above, and a pair of left and right overhangs facing each other in the U-shape are provided with front-rear swing shaft holes 53g penetrating in the left-right direction. Have. The vertical swing support shaft 5 shown in FIG. 3 is inserted into the front-rear swing shaft hole 53 g. The front portion of the cutting machine main body 10 is supported on the vertical swing support shaft 5 so as to be swingable back and forth. A scale indicating portion 53i projecting forward is provided at the left end portion of the front main body support portion 53f. When the angular plate 51 and the bracket 53 are assembled, the scale indicator 53i overlaps with the inclination angle scale 51c. From the value of the tilt angle scale 51c that overlaps with the scale indicator 53i, the tilt angle of the cutting machine main body 10 in the left-right direction can be read.

As shown in FIG. 6, a long hole-shaped lever base guide hole 53h that penetrates in the front-rear direction and is along the arc-shaped lever shaft guide hole 51b is provided in the front portion of the front main body support portion 53f. .. As shown in FIG. 10, the lever shaft 58a of the fixed lever 58 is inserted into the lever shaft guide hole 51b and the lever base guide hole 53h. The operating portion of the fixing lever 58 is arranged in front of the angular plate 51. As shown in FIG. 4, the fixed lever 58 is provided so as to be rotatable around the lever shaft 58a from the front side of the portable cutting machine 1. The lever base portion 58b, which is the rear portion of the lever shaft 58a, has a rectangular cross section as shown in FIG. The lever base 58b can be engaged with the lever base guide hole 53h. The fixed lever 58 is rotated to rotate the lever base 58b so as to be in a stretched posture in the lever base guide hole 53h, and the lever base 58b and the lever base guide hole 53h are engaged with each other. As a result, the movement of the bracket 53 with respect to the angular plate 51 (left-right tilting around the left-right tilting support shaft 6) is restricted. The fixed lever 58 is rotated to rotate the lever base 58b so that it can move in the lever base guide hole 53h. As a result, the restriction on the movement of the bracket 53 with respect to the angular plate 51 is released.

As shown in FIG. 6, an intermediate portion between the left-right tilting shaft hole 53e of the bracket 53 and the front main body support portion 53f is provided as a stopper portion 53a. The upper surface of the stopper portion 53a has a wavy and intricate shape. On the upper surface of the stopper portion 53a, a second pin contact portion 53c, a first pin contact portion 53b, and a third pin contact portion 53d are provided in order from the right side closer to the left-right tilting shaft hole 53e. The second pin contact portion 53c and the third pin contact portion 53d are provided at positions close to the wavy valley portion on the upper surface of the stopper portion 53a. The first pin contact portion 53b is provided at a position corresponding to the middle of the corrugated mountain portion on the upper surface of the stopper portion 53a.

As shown in FIG. 7, an insertion hole 55c through which the dial mounting screw 55a shown in FIG. 5 can be inserted penetrates substantially in the center of the switching operation dial 55 in the front-rear direction. The switching operation dial 55 can rotate about the axis of the dial mounting screw 55a. A triangular arrow 55b pointing outward in the radial direction is provided on the front surface of the switching operation dial 55. As shown in FIG. 4, the triangular arrow 55b points to the switching angle scale 51d, and the maximum tilt angle set by the tilt switching mechanism 52 can be read.

As shown in FIG. 7, the switching operation dial 55 is provided with a fine adjustment mechanism 57 on the side opposite to the triangular arrow 55b with the insertion hole 55c interposed therebetween. As shown in FIG. 5, the fine adjustment operation unit 57a of the fine adjustment mechanism 57 is a columnar member extending in the front-rear direction, and is inserted into a pin insertion hole 55d penetrating the switching operation dial 55 in the front-rear direction. .. As shown in FIG. 7, for example, a hexagonal tool engaging hole 57c is provided on the front surface of the fine adjustment operation unit 57a. The end of a tool such as a hexagon wrench can be inserted into the tool engaging hole 57c. By rotating the tool inserted into the tool engaging hole 57c, the fine adjustment operation unit 57a rotates about the rotation shaft 57b (see FIG. 8) extending in the front-rear direction.

As shown in FIG. 8, a locking portion 54 is integrally connected to the rear portion of the fine adjustment operation portion 57a. The locking portion 54 has a columnar pin 54a extending back and forth. The axis 54b of the pin 54a is parallel to the rotation shaft 57b and is eccentric from the rotation shaft 57b by, for example, 10% of the diameter of the pin 54a. The side surface of the pin 54a is a contact portion 54c that contacts the first pin contact portion 53b, the second pin contact portion 53c, and the third pin contact portion 53d shown in FIG. By rotating the fine adjustment operation unit 57a, the pin 54a rotates about the rotation shaft 57b.

As shown in FIG. 9, the rear surface of the switching operation dial 55 is provided with three circular holes of a first ball engaging hole 55e, a second ball engaging hole 55f, and a third ball engaging hole 55g. There is. The first ball engaging hole 55e, the second ball engaging hole 55f, and the third ball engaging hole 55g have substantially the same diameter, and are provided at the same distance from the center of the insertion hole 55c. The balls 56a of the plunger 56 shown in FIG. 5 are urged forward to engage with the first to third ball engaging holes 55e, 55f, 55g. When the ball 56a engages with any of the first to third ball engagement holes 55e, 55f, 55g, the switching operation dial 55 is held in a posture rotated by a predetermined angle. When the position-held switching operation dial 55 is rotated, the ball 56a moves backward against the urging force of the compression spring 56b and engages with the first to third ball engagement holes 55e, 55f, 55g. Get out of. As a result, the rotation angle of the switching operation dial 55 can be changed.

As shown in FIG. 10, the base 2 is provided with a male screw 2b under the bracket 53. The upper portion of the male screw 2b protrudes from the upper surface of the base 2, and the lower portion on the lower surface side of the base 2 is provided so that a tool such as a hexagon wrench can be inserted. By engaging the tool with the male screw 2b from the lower surface side of the base 2 and rotating the male screw 2b, the protrusion length of the male screw 2b from the upper surface of the base 2 changes. The upper end of the male screw 2b comes into contact with the lower surface of the bracket 53 when the inclination angle of the cutting machine main body 10 (see FIG. 2) in the left-right direction is 0 °. Therefore, by adjusting the protrusion length of the male screw 2b from the upper surface of the base 2, the horizontal posture of the cutting machine main body 10 when the inclination angle in the left-right direction is 0 ° can be finely adjusted.

As shown in FIG. 11, the switching operation dial 55 is rotated to engage the ball 56a with the first ball engaging hole 55e. In this case, the pin 54a is located substantially to the right of the dial mounting screw 55a. When the bracket 53 is tilted to the right, the left-right tilt of the bracket 53 is locked at a position where the contact portion 54c of the pin 54a and the first pin contact portion 53b abut. In FIG. 11, the bracket 53 is locked, for example, at a position inclined to the right by 45 °. When the fine adjustment operation unit 57a is rotated to rotate the pin 54a around the rotation shaft 57b, the position of the contact portion 54c that comes into contact with the first pin contact portion 53b is slightly displaced. Thereby, the inclination angle of the bracket 53 in the left-right direction when the first pin contact portion 53b comes into contact with the contact portion 54c can be finely adjusted in the range of 0 to 3 °, for example.

As shown in FIG. 12, the switching operation dial 55 is rotated to engage the ball 56a with the second ball engaging hole 55f. In this case, the pin 54a is located substantially below the dial mounting screw 55a. When the bracket 53 is tilted to the right, the left-right tilt of the bracket 53 is locked at a position where the contact portion 54c of the pin 54a and the second pin contact portion 53c come into contact with each other. In FIG. 12, the bracket 53 is locked, for example, at a position inclined to the right by 22.5 °. By rotating the fine adjustment operation unit 57a, the pin 54a is rotated around the rotation shaft 57b to displace the position of the contact portion 54c. Thereby, the inclination angle of the bracket 53 in the left-right direction when the second pin contact portion 53c comes into contact with the contact portion 54c can be finely adjusted in the range of 0 to 3 °, for example.

As shown in FIG. 13, the switching operation dial 55 is rotated to engage the ball 56a with the third ball engaging hole 55g. In this case, the pin 54a is located on the upper right side of the dial mounting screw 55a. When the bracket 53 is tilted to the right, the left-right tilt of the bracket 53 is locked at a position where the contact portion 54c of the pin 54a and the third pin contact portion 53d come into contact with each other. In FIG. 13, the bracket 53 is locked, for example, at a position inclined by 60 ° to the right. By rotating the fine adjustment operation unit 57a, the pin 54a is rotated around the rotation shaft 57b to displace the position of the contact portion 54c. As a result, the tilt angle of the bracket 53 in the left-right direction when the third pin contact portion 53d comes into contact with the contact portion 54c can be set in the range of 0 to 3 °, for example.

According to the portable cutting machine 1 of the first embodiment described above, as shown in FIG. 4, the cutting machine main body 10 is supported on the upper surface of the base 2 so as to be tiltable in the left-right direction in front of the cutting machine main body 10. An angular plate 51 is provided. The angular plate 51 is provided with an inclination switching mechanism 52 capable of switching the maximum inclination angle of the cutting machine main body 10 in the left-right direction. As shown in FIG. 5, the tilt switching mechanism 52 includes a stopper portion 53a and a locking portion 54 that comes into contact with the stopper portion 53a and regulates the tilt of the cutting machine main body 10 at the maximum tilt angle. The portable cutting machine 1 is provided with a fine adjustment mechanism 57 that finely adjusts the position of the contact portion 54c of the locking portion 54 that comes into contact with the stopper portion 53a. As shown in FIG. 4, the fine adjustment operation unit 57a of the fine adjustment mechanism 57 is provided in front of the angular plate 51.

Therefore, when viewed from the operator, the fine adjustment operation unit 57a is arranged in front of the angular plate 51 along the front-rear direction in which the inclination of the cutting tool 11 is visually recognized. Therefore, it is possible to easily operate the fine adjustment operation unit 57a at the same time while checking the inclination of the cutting tool 11. Thus, it is possible to provide the fine adjustment mechanism 57 having good operability.

Further, according to the portable cutting machine 1, as shown in FIG. 4, the inclination switching mechanism 52 includes a switching operation dial 55 on the front surface of the angular plate 51. A fine adjustment operation unit 57a is provided on the front portion of the switching operation dial 55.

Therefore, the switching operation dial 55 and the fine adjustment operation unit 57a are collectively arranged in the inclination switching mechanism 52 along the front-rear direction in which the inclination of the cutting tool 11 is visually recognized. Therefore, for example, after the switching operation dial 55 is rotated, the fine adjustment operation unit 57a can be smoothly shifted to the rotation operation. As a result, the operability of the tilt switching mechanism 52 including both the switching operation dial 55 and the fine adjustment operation unit 57a is improved.

Further, according to the portable cutting machine 1, as shown in FIG. 8, the fine adjustment operation unit 57a can be rotated around a rotation shaft 57b parallel to the front-rear direction. By rotating the fine adjustment operation unit 57a, the position of the contact portion 54c is displaced.

Therefore, the fine adjustment operation unit 57a can be rotated at the same time while checking the inclination of the cutting tool 11, and the degree of the rotation operation can be easily confirmed. Further, the rotation operation is easier to make fine adjustments with higher accuracy than, for example, a push operation. Therefore, the operability of the fine adjustment operation unit 57a is improved.

Further, according to the portable cutting machine 1, as shown in FIG. 8, the locking portion 54 includes a columnar pin 54a. The axis 54b of the pin 54a is parallel to the rotation shaft 57b and eccentric with respect to the rotation shaft 57b. The position of the pin 54a is displaced by the rotation operation of the fine adjustment operation unit 57a.

Therefore, the fine adjustment mechanism 57 can be provided with a simple structure. Further, the pin 54a is relatively displaced around the rotation shaft 57b, and the pin 54a is not directly moved with respect to the fine adjustment mechanism 57, for example. Therefore, the accuracy of the fine adjustment mechanism 57 at the time of shipment of the product can be maintained. Further, since the pin 54a has a cylindrical shape, the locus in which the contact portion 54c is displaced has a relatively smooth arc shape. Therefore, the maximum tilt angle of the bracket 53 in the left-right direction can be continuously finely adjusted.

Further, according to the portable cutting machine 1, as shown in FIG. 4, a tool engaging hole 57c that can be engaged by inserting a tool such as a hexagon wrench into the front end of the fine adjustment operation portion 57a having the rotating shaft 57b. Is provided.

Therefore, the fine adjustment operation unit 57a can be provided so that the front end does not protrude. Therefore, the portable cutting machine 1 can be made compact in the front-rear direction.

[Second Embodiment]
Next, the second embodiment of the present invention will be described with reference to FIGS. 14 to 20. In the following description, the portable cutting machine 60 of the second embodiment will be described in detail only in a configuration different from that of the portable cutting machine 1 of the first embodiment. As shown in FIG. 16, an angular plate 61 on the front side of the cutting machine main body 10 and an angular plate 72 on the rear side of the cutting machine main body 10 are fixed to the base 71.

As shown in FIG. 17, the angular plate 61 protruding upward from the base 71 in a fan shape includes a dial mounting portion 61e provided on the front surface and an arc-shaped hole 61a provided around the dial mounting portion 61e in an arc shape. The plunger accommodating hole 61f provided on the upper left side of the dial mounting portion 61e and the switching angle scale 61d marked around the dial mounting portion 61e are provided. A switching operation dial 65 is attached to the dial attachment portion 61e by a dial attachment screw 65a. The ball 66a and the compression spring 66b of the plunger 66 are housed in the plunger accommodating hole 61f. Further, the angular plate 61 has a lever shaft guide hole 61b extending in an arc shape along the outer shape of the left side portion of the angular plate 61, and an inclination angle scale 61c marked along the lever shaft guide hole 61b. On the rear surface of the angular plate 61, two concave rail portions 61g extending in an arc shape and having a concave shape toward the front are arranged side by side.

As shown in FIG. 14, the front tilting support portion 3 is provided with a tilt switching mechanism 62 capable of switching the maximum tilt angle in the left-right direction of the cutting machine main body 10. The tilt switching mechanism 62 is composed of a switching operation dial (switching operation unit) 65 attached to the front surface of the angular plate 61 and an angular guide 63 provided behind the angular plate 61 and connected to the cutting machine main body 10. ..

As shown in FIG. 17, the angular guide 63 has a fan-shaped outer shape substantially the same as that of the angular plate 61. On the front surface of the angular guide 63, two convex rail portions 63e extending in an arc shape and projecting forward are arranged side by side. The convex rail portion 63e is slidably engaged with the concave rail portion 61g of the angular plate 61 with a gap. As a result, the angular guide 63 can be tilted in the left-right direction with respect to the angular plate 61 along the concave rail portion 61 g. As shown in FIG. 15, a scale indicating portion 63h projecting forward is provided at the left end portion of the front main body support portion 63f. The scale indicating portion 63h is arranged at a position overlapping with the inclination angle scale 61c, and indicates the inclination angle of the cutting machine main body 10 in the left-right direction.

As shown in FIG. 17, the front surface of the angular guide 63 is provided with a lever shaft support hole 63 g in which a female screw is formed. The operating portion of the fixing lever 68 is located on the front side of the angular plate 61. The lever shaft 68a of the fixed lever 68 is provided at the rear portion as a male screw, penetrates the lever shaft guide hole 61b, and is attached to the female screw of the lever shaft support hole 63 g. When the fixing lever 68 is rotated in the screw tightening direction to fasten the angular plate 61 and the angular guide 63 to each other in the front-rear direction, the left-right tilt of the angular guide 63 is restricted. When the fixing lever 68 is rotated in the loosening direction to release the engaged state between the angular plate 61 and the angular guide 63, the angular guide 63 becomes slidable with respect to the angular plate 61. As shown in FIG. 14, a front main body support portion 63f is provided on the left rear portion of the angular guide 63. The cutting machine main body 10 is vertically swingably connected to the front main body support portion 63f via a vertical swing support shaft 5 extending in the left-right direction.

As shown in FIG. 17, a notch 63b that penetrates the angular guide 63 in the front-rear direction is provided at the lower right side of the angular guide 63. The cutout portion 63b is provided so that a movable stopper portion 69, which will be described later, can enter. As shown in FIG. 19, the angular guide 63 has a stopper portion 63a on the right side of the movable stopper portion 69. The upper surface of the stopper portion 63a on the right side of the movable stopper portion 69 is provided as the second pin contact portion 63c.

As shown in FIG. 17, the switching operation dial 65 has an insertion hole 65c provided so that the dial mounting screw 65a can be inserted, a triangular arrow 65b provided on the front surface indicating the switching angle scale 61d, and extending from the rear surface to the rear. It has a pin (locking portion) 64 to be ejected. The pin 64 is provided on the side opposite to the triangular arrow 65b with the insertion hole 65c interposed therebetween. The pin 64 extends rearward through the arcuate hole 61a and can move along the arcuate shape of the arcuate hole 61a as the switching operation dial 65 rotates. The side surface of the columnar pin 64 is a contact portion 64a that comes into contact with the stopper portion 63a or the movable stopper portion 69. Further, although not particularly visible on the rear surface of the switching operation dial 65, similarly to the switching operation dial 55 shown in FIG. 9, the ball 66a of the plunger 66 is engaged to position the switching operation dial 65. The first to third ball engagement holes are provided.

As shown in FIG. 17, a fine adjustment mechanism 70 having a movable stopper portion 69 is provided on the rear side of the angular guide 63. The movable stopper portion 69 has entered the notch portion 63b and is movable with respect to the angular guide 63. The front portion of the movable stopper portion 69 is provided with a first pin contact portion (stopper surface) 69a having an inclined surface facing upward to the right. A spring accommodating portion 69b having a circular hole extending in the vertical direction is provided on the rear side of the first pin contact portion 69a. On the rear side of the spring accommodating portion 69b, an upper overhanging portion 69e protruding upward and a rear overhanging portion 69c protruding rearward from the upper overhanging portion 69e are provided. The rear overhanging portion 69c is provided with a screw hole 69d opened in the front-rear direction. The fine adjustment mechanism 70 includes a set screw (fine adjustment operation unit) 70a extending in the front-rear direction,, for example, a hexagonal tool engaging hole 70b provided above the set screw 70a, and a compression spring 70c. ..

As shown in FIG. 18, the compression spring 70c is housed between the spring accommodating portion 69b and the upper surface of the notch portion 63b. The movable stopper portion 69 is prevented from coming off from the angular guide 63 by the upper overhanging portion 69e. The movable stopper portion 69 is elastically held with respect to the angular guide 63 while being urged downward by the compression spring 70c. The set screw 70a is screwed into the screw hole 69d. The lower end of the set screw 70a is in contact with the flat surface portion 63i formed on the angular guide 63. A tool such as a hexagon wrench can be inserted into the tool engagement hole 70b to engage the tool. When the set screw 70a is rotated by a tool, the set screw 70a and the screw hole 69d are screwed together, so that the movable stopper portion 69 is displaced in the vertical direction while receiving the urging force of the compression spring 70c.

As shown in FIG. 20, the switching operation dial 65 is rotated to set the maximum tilt angle of the cutting machine main body 10 (see FIG. 15) to the right to, for example, 45 °. In this case, the pin 64 is located substantially to the right of the dial mounting screw 65a. When the angular guide 63 is tilted to the right, the contact portion 64a and the first pin contact portion 69a come into contact with each other, and the left-right tilt of the angular guide 63 is locked. When the set screw 70a is rotated to move the movable stopper portion 69 up and down, the position of the first pin contact portion 69a that comes into contact with the contact portion 64a is slightly displaced. Thereby, the inclination angle of the angular guide 63 in the left-right direction when the first pin contact portion 69a abuts on the contact portion 64a can be finely adjusted in the range of 0 to 3 °, for example. When the switching operation dial 65 is set to, for example, 60 °, the pin 64 does not abut anywhere, and the end of the lever shaft guide hole 61b abuts the lever shaft 68a.

As shown in FIG. 16, the rear tilting support portion 4 has an angular plate 72 protruding upward from the base 71 in a fan shape, and an angular guide having a fan shape substantially the same as the angular plate 72 provided on the front side of the angular plate 72. It includes a 73 and a fixed lever 74 that can be rotated. Although the angular guide 73 is not shown in detail in the drawing, it is integrally connected to the angular guide 63. A concave rail portion 72a extending in an arc shape and having a concave shape toward the rear is provided on the front surface of the angular plate 72. The rear surface of the angular guide 73 is provided with a convex rail portion 73a that extends in an arc shape and projects rearward. When the concave rail portion 72a and the convex rail portion 73a are slidably engaged with each other, the angular guide 73 is supported so as to be tiltable in the left-right direction along the concave rail portion 72a with respect to the angular plate 72. ing. The movement of the angular guide 73 with respect to the angular plate 72 is restricted by rotating the fixed lever 74 in the tightening direction, and the restriction is released by rotating the fixed lever 74 in the loosening direction.

According to the portable cutting machine 60 of the second embodiment described above, as shown in FIG. 16, an angular guide 63 and an angular guide 73 are provided at the front and rear portions of the cutting machine main body 10. The angular guide 63 and the angular guide 73 are integrally connected. Angular plates 61, 72 that slidably engage with the angular guides 63 and 73 to slidably support the cutting machine main body 10 in the left-right direction are provided on the front and rear portions of the upper surface of the base 71. The angular plate 61 is provided with an inclination switching mechanism 62 capable of switching the maximum inclination angle of the cutting machine main body 10 in the left-right direction. The angular guide 63 is provided with a fine adjustment mechanism 70 that is movable up and down so that the maximum inclination angle can be finely adjusted.

Therefore, even in the portable cutting machine 60 of the type that does not provide the tilting support shaft, the maximum tilt angle of the cutting machine main body 10 can be finely adjusted with high accuracy. In the case of this type of portable cutting machine, a direction intersecting the left-right tilting direction between the concave rail portion 61 g of the angular plate 61 and the convex rail portion 63e of the angular guide 63 in order to ensure slidability. There is a gap in. For example, in the case of the portable cutting machine 1 provided with the left / right tilt support shaft 6, the tilt is supported by the left / right tilt support shaft 6 and the locking portion 54. Since the left-right tilting support shaft 6 almost eliminates the radial gap of the cutting machine main body 10, even if the locking portion 54 for positioning in the tilting direction becomes somewhat unstable, the accuracy of the fine adjustment mechanism 57 is less adversely affected. .. Therefore, in the portable cutting machine 1, the accuracy of fine adjustment is good even if the fine adjustment mechanism 57 having the contact portion is provided on the angular plate 51 having a small space. On the other hand, in the case of the portable cutting machine 60 having no tilting support shaft, the fine adjustment mechanism 70 having the first pin contact portion 69a is not provided on the angular plate 61, and the angular guide 63 can take a large space. The first pin contact portion 69a can be firmly attached by providing the first pin contact portion 69a. As a result, it becomes easy to obtain accuracy by fine adjustment by the fine adjustment mechanism 70. Moreover, the fine adjustment mechanism 70 is operated so as to operate in the vertical direction substantially orthogonal to the left-right tilt direction with respect to the angular guide 63 that tilts left and right. Therefore, the fine adjustment mechanism 70 is easy to operate with the cutting machine main body 10 and the angular guide 63 tilted left and right, and has good operability.

Further, according to the portable cutting machine 60, as shown in FIG. 17, the inclination switching mechanism 62 includes a switching operation dial 65 on the front surface of the angular plate 61. A pin 64 is provided on the rear surface of the switching operation dial 65. The fine adjustment mechanism 70 has a first pin contact portion 69a that can come into contact with the pin 64 and can move in the vertical direction on the front surface of the angular guide 63 facing the angular plate 61.

Therefore, the contact position between the pin 64 and the first pin contact portion 69a is finely adjusted in the vertical direction. This vertical direction is along the direction of closing the gap between the concave rail portion 61g and the convex rail portion 63e. Moreover, the contact position between the pin 64 and the first pin contact portion 69a is near the concave rail portion 61g and the convex rail portion 63e. Therefore, fine adjustment by the fine adjustment mechanism 70 can more accurately suppress variations in the maximum inclination angle of the cutting machine main body 10 due to the gap. As a result, the accuracy of fine adjustment can be improved while improving the operability of the fine adjustment mechanism 70.

Further, according to the portable cutting machine 60, as shown in FIG. 18, the fine adjustment mechanism 70 has a tool engaging hole in which a tool such as a hexagon wrench can be inserted and engaged on the rear side of the angular guide 63. It is equipped with 70b.

Therefore, by engaging the tool with the tool engaging hole 70b, the fine adjustment mechanism 70 can be easily operated while visually recognizing both the inclination of the cutting tool 11 (see FIG. 16) and the operating portion of the tool from the front. Therefore, the operability of the fine adjustment mechanism 70 is improved. Further, by making the fine adjustment mechanism 70 operable with a tool that can be removed from the tool engagement hole 70b, the fine adjustment mechanism 70 can be provided compactly.

[Other variants]
Various changes can be made to the portable cutting machines 1 and 60 of the first and second embodiments described above. Although a portable cutting machine called a portable round saw has been exemplified, the present invention can be applied to other portable cutting machines such as cutters and jigsaws. A configuration may include both the fine adjustment mechanism 57 of the first embodiment and the fine adjustment mechanism 70 of the second embodiment. With this configuration, fine adjustment for one maximum tilt angle can be performed by operating the fine adjustment mechanism 57, and fine adjustment for the other maximum tilt angle can be performed by operating the fine adjustment mechanism 70. That is, two or more maximum tilt angles, which are relatively frequently used, can be finely adjusted and maintained at the same time. As a result, the number of cases where the fine adjustment mechanism 57 or the fine adjustment mechanism 70 is operated each time the tilt switching mechanism is switched can be reduced, and the convenience of the portable cutting machine is enhanced. Although the portable cutting machine 1 having the left-right tilting support shaft 6 and the portable cutting machine 60 not having the left-right tilting support shaft 6 have been illustrated, the fine adjustment mechanism 57 or the fine adjustment mechanism 70 is applied to any of the configurations. be able to.

Although the configuration in which the tilt switching mechanism and the fine adjustment mechanism are provided on the front angular plate or the angular guide is illustrated, for example, the configuration may be replaced with the configuration in which the tilt switching mechanism and the fine adjustment mechanism are provided on the front angular plate or the angular guide. Although the case where the cutting machine main body 10 is tilted to the right has been illustrated, it can also be applied to the case where the cutting machine main body 10 is tilted to the left. The maximum tilt angle set by the tilt switching mechanism is not limited to the illustrated angle, and may be set to, for example, 30 °, or the number of sets of the maximum tilt angle may be increased or decreased. Pins 54a and 64 may be replaced with, for example, an elliptical cross section. The shape of the tool engaging holes 57c and 70b may be replaced with a shape in which a so-called Phillips screwdriver or a flat-blade screwdriver is engaged, for example.

1 ... Portable cutting machine (first embodiment)
2 ... Base, 2a ... Window, 2b ... Male screw 3 ... Front tilting support, 4 ... Rear tilting support, 5 ... Vertical swing support shaft, 6 ... Left and right tilting support shaft 7 ... Depth guide 7a ... Bolt guide hole , 7b ... Scale indicator, 7c ... Fixing bolt, 7d ... Fixed lever 10 ... Cutting machine body, 11 ... Cutting tool, 12 ... Outer flange, 13 ... Fixed bolt 15 ... Fixed cover, 15a ... White arrow (Rotating direction of cutting tool) Show)
15b ... Dust collection nozzle, 15c ... Depth scale 16 ... Movable cover, 16a ... Open / close lever 20 ... Motor housing, 20a ... Intake port 21 ... Electric motor, 22 ... Controller, 25 ... Gear housing 30 ... Handle part, 31 ... Grip Part, 31a ... Elastoma resin layer 32 ... Switch lever, 33 ... Lockoff button, 34 ... Front handle 40 ... Battery base, 41 ... Battery mounting part, 42 ... Battery pack 51 ... Angular plate, 51a ... Arc hole, 51b ... Lever Shaft guide hole 51c ... Tilt angle scale, 51d ... Switching angle scale, 51e ... Dial mounting portion 51f ... Plunger accommodating hole 52 ... Tilt switching mechanism 53 ... Bracket, 53a ... Stopper portion, 53b ... First pin contact portion 53c ... 2-pin contact portion, 53d ... Third pin contact portion, 53e ... Left-right tilting shaft hole 53f ... Front main body support portion, 53 g ... Front-rear swing shaft hole, 53h ... Lever base guide hole 53i ... Scale indicator 54 ... Stop part, 54a ... Pin, 54b ... Axis center, 54c ... Contact part 55 ... Switching operation dial (switching operation part), 55a ... Dial mounting screw 55b ... Triangular arrow, 55c ... Insertion hole, 55d ... Pin insertion hole 55e ... 1st ball engaging hole, 55f ... 2nd ball engaging hole, 55g ... 3rd ball engaging hole 56 ... plunger, 56a ... ball, 56b ... compression spring 57 ... fine adjustment mechanism, 57a ... fine adjustment operation unit, 57b ... Rotating shaft, 57c ... Tool engaging hole 58 ... Fixed lever, 58a ... Lever shaft, 58b ... Lever base 59 ... Rear body support 60 ... Portable cutting machine (second embodiment)
61 ... (front side) angular plate, 61a ... arc-shaped hole, 61b ... lever shaft guide hole 61c ... tilt angle scale, 61d ... switching angle scale, 61e ... dial mounting portion 61f ... plunger accommodating hole, 61g ... concave rail portion 62 ... Tilt switching mechanism 63 ... (front side) angular guide, 63a ... stopper part, 63b ... notch part 63c ... second pin contact part, 63e ... convex rail part, 63f ... front side main body support part 63g ... lever shaft support hole, 63h ... Scale indicator, 63i ... Flat surface 64 ... Pin (locking part), 64a ... Contact part 65 ... Switching operation dial (switching operation part), 65a ... Dial mounting screw 65b ... Triangular arrow, 65c ... Insertion hole 66 ... Plunger, 66a ... Ball, 66b ... Compression spring 68 ... Fixed lever, 68a ... Lever shaft 69 ... Movable stopper, 69a ... First pin contact part (stopper surface), 69b ... Spring accommodating part 69c ... Rear overhang , 69d ... Screw hole, 69e ... Upper overhang 70 ... Fine adjustment mechanism 70a ... Set screw (fine adjustment operation part), 70b ... Tool engagement hole, 70c ... Compression spring 71 ... Base 72 ... (Rear side) Angular plate , 72a ... Concave rail portion 73 ... (rear side) Angular guide, 73a ... Convex rail portion, 74 ... Fixed lever W ... Material to be cut

Claims (8)

A base to be brought into contact with the material to be cut and a cutting machine main body having a cutting tool supported on the upper surface of the base are provided, and the cutting tool is projected from the lower surface side of the base to cut into the material to be cut. It is a portable cutting machine that performs cutting processing.
An angular plate is provided on the upper surface of the base to support the cutting machine main body so as to be tiltable in the left-right direction in front of or behind the cutting machine main body.
The angular plate is provided with an inclination switching mechanism capable of switching the maximum inclination angle in the left-right direction of the cutting machine main body.
The tilt switching mechanism includes a stopper portion and a locking portion that comes into contact with the stopper portion and regulates the left-right tilt of the cutting machine body at the maximum tilt angle.
A portable device provided with a fine adjustment mechanism for finely adjusting the position of the contact portion of the locking portion that comes into contact with the stopper portion, and a fine adjustment operation portion of the fine adjustment mechanism provided in front of or behind the angular plate. Cutting machine. The portable cutting machine according to claim 1.
The tilt switching mechanism is a portable cutting machine provided with a switching operation unit on the front surface or the rear surface of the angular plate, and the fine adjustment operation unit provided on the switching operation unit. The portable cutting machine according to claim 1 or 2.
The fine adjustment operation unit is a portable cutting machine capable of finely adjusting the position of the contact portion by rotating around a rotation axis parallel to the front-rear direction. The portable cutting machine according to claim 3.
The locking portion includes a pin having an axis parallel to the rotation axis and eccentric to the rotation axis.
The fine adjustment mechanism is a portable cutting machine having a structure in which the position of the pin is displaced by a rotation operation of the fine adjustment operation unit. The portable cutting machine according to claim 3 or 4.
A portable cutting machine provided with a tool engaging hole that allows a tool to be inserted and engaged at the end of the rotating shaft. A base to be brought into contact with the material to be cut and a cutting machine main body having a cutting tool supported on the upper surface of the base are provided, and the cutting tool is projected from the lower surface side of the base to cut into the material to be cut. It is a portable cutting machine that performs cutting processing.
The cutting machine main body is provided with an angular guide in which the front part and the rear part are integrated.
Angular plates that slidably engage with the angular guide to slidably support the cutting machine body in the left-right direction are provided on the front and rear portions of the upper surface of the base.
The angular plate is provided with an inclination switching mechanism capable of switching the maximum inclination angle in the left-right direction of the cutting machine main body.
The angular guide is a portable cutting machine provided with a fine adjustment mechanism that is movable up and down so that the maximum inclination angle can be finely adjusted. The portable cutting machine according to claim 6.
The tilt switching mechanism is provided with a switching operation unit on the front surface or the rear surface of the angular plate.
A locking portion is provided in the switching operation portion, and a locking portion is provided.
The fine adjustment mechanism is a portable cutting machine having a stopper surface capable of contacting the locking portion and movable in the vertical direction on the front surface of the angular guide facing the angular plate. The portable cutting machine according to claim 7.
The fine adjustment mechanism is a portable cutting machine provided with a tool engagement hole on the rear side of the angular guide to which a tool can be inserted and engaged.

Images