JP2012066366A - Desktop cutting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance operability of an operation member as compared with a conventional one, in a desktop cutting machine capable of performing the cutting working by inclining a cutting machine body to the right and left, wherein because the operation member for fixing and operating the inclined position of the cutting machine body is conventionally provided at a rear side of a body support part, it is not easily seen by a user, and it is necessary to operate the operation member by extending a hand with an uneasy posture.SOLUTION: An operation member 61 of an inclined position fixing device 60 for fixing the inclined position of a cutting machine body 10 is provided at the right side part of a body support part 40 allowing a user to easily see it and to extend a hand with an easy posture. Further, the operation direction of the operation member 61 is set in right and left directions to further enhance the operability.

Description

The present invention relates to a tabletop type cutting machine in which, for example, a cutting machine body provided with a rotary blade such as a circular grindstone or a saw blade is moved down to cut a cutting material fixed on a table.
About.

Generally, this type of tabletop cutting machine has a structure in which a cutting machine body having a circular rotary blade that rotates using an electric motor as a drive source is supported so as to be tiltable up and down with respect to the table. The cutting machine body is moved downward from above with respect to the fixed cutting material, and the cutting blade is cut into the cutting material for cutting.
In this tabletop cutting machine, a function for enabling various forms of cutting processing has been added. For example, one provided with a function for performing so-called inclined cutting by cutting a rotary blade in a state where the cutting machine main body is inclined leftward or rightward as viewed from the user is provided. Conventional techniques for performing this tilt cutting are disclosed in Patent Documents 1 and 2 below.
Conventionally, this tilt cutting function rotates the tilting side support member on the cutting machine main body side via the left and right tilting shafts with respect to the fixed side support member on the table side for the main body support portion that supports the cutting machine main body with respect to the table. It is configured such that it can be coupled, and the tilt position of the cutting machine main body is fixed by tightening a fixing screw between the fixed side support member and the tilt side support member. For this reason, the fixing screw is arranged in parallel to the left-right tilting axis, and the fixing lever for rotating the fixing screw is arranged on the rear side of the main body support portion.
The user can lock and unlock the inclined position of the cutting machine main body by extending his hand to the back side of the main body support and rotating the fixing lever to the lock side or the unlock side.

JP 2005-279934 A JP 2009-226529 A

As described above, the fixing lever that is operated when locking and unlocking the inclined position of the cutting machine main body is arranged on the back side away from the user and behind the main body support portion. At this time, it is necessary for the user to extend the hand in such a posture as to look into the back side of the main body support portion to grip the fixing lever, and in this respect, it is necessary to improve the operability of the fixing lever.
An object of the present invention is to improve the operability of an operation member in an inclined position fixing device for fixing an inclined position of a cutting machine body.

The above problems are solved by the following invention.
A first invention is a table on which a cutting material is placed, and a cutting machine supported so as to be movable up and down through a main body supporting portion provided on the table and to change the right and left inclined positions as viewed from the user. A tabletop cutting machine provided with a main body, wherein the main body support portion is a table-side fixed-side support member, a cutting-machine main-body-side tilt-side support member, and a left-right tilt coupling these two support members so as to be rotatable relative to each other. An axis and a tilt position fixing device for fixing the right and left tilt position of the cutting machine main body by restricting the rotation of the tilt side support member with respect to the fixed side support member, and an operation member for operating the tilt position fixing device This is a tabletop cutting machine provided on the left side or right side of the main body support.
According to the first invention, the operation member for operating the tilt position fixing device for fixing the tilt position of the cutting machine main body is not the rear surface (back surface) of the main body support portion as in the prior art, but the user. Near the front, left side or right side. Thus, the user can reach out to the operation member with a more comfortable posture than before, and in this respect, the operability of this type of tilt position fixing device can be improved as compared with the prior art.
In addition, since the operation member is provided not on the back of the main body support but on the front, left or right side, which is easily visible to the user, the user can operate without taking a cramped posture such as looking into the back. A hand can be extended to a member and the operativity of the said inclination position fixing device can be improved also in this point.
In this specification, the inclination position of the cutting machine main body is used in the sense of including a right-angle cutting position where the inclination angle is zero degrees (position where the rotation axis of the rotary blade is parallel to the upper surface of the table).
A second invention is a tabletop cutting machine according to the first invention, wherein the operating direction of the operating member is the left-right direction. According to the second invention, when the operation direction is assumed to be the front-rear direction, the user needs to reach farther for the backward operation, but if the operation direction is the left-right direction, the operation in any direction Since the distance to reach the hand is substantially the same, the operability of the operating member can be further improved in this respect.
According to a third invention, in the first or second invention, the tilt position fixing device includes a cylindrical brake drum provided on one of the fixed side support member and the tilt side support member, and an annular brake shoe provided on the other side. And a tabletop cutting machine configured to fix the inclined position of the cutting machine body by restricting the rotation of the tilting side support member relative to the fixed side support member by the frictional force generated by pressing the brake shoe against the brake drum.
According to the third invention, the inclined position fixing device can be compactly assembled between the fixed side support member and the tilt side support member, and the problem can be solved without causing an increase in the size of the main body support portion.
A fourth invention is a tabletop cutting machine according to the third invention, wherein a tightening belt is fastened around the brake shoe and the brake shoe is pressed against the brake drum. According to the fourth aspect of the invention, the annular brake shoe can be pressed against the annular brake drum in the radial direction with a uniform and large pressing force. It is possible to reliably fix the inclined position.
In a fifth aspect based on the fourth aspect, the inclined position fixing device is configured such that the tightening belt is wound around the brake shoe, one end of the tightening belt is fixed, and the other end is connected via a spring-biased toggle mechanism. It is a tabletop cutting machine configured to be connected to the operation member.
According to the fifth aspect of the present invention, the tightening belt is tightened around the brake shoe by pulling the other end side of the tightening belt through the toggle mechanism by the operation of the operation member, and the brake shoe is attached to the brake drum. It is pressed along the entire circumference in the radial direction, whereby the rotation of the tilt side support member relative to the fixed side support member is restricted, and the tilt position of the cutting machine body is fixed. When the tightening belt is released by operating the operating member, the winding state of the tightening belt around the brake shoe is released, and the pressing of the brake shoe against the brake drum is released, thereby making it possible to change the tilt position of the cutting machine body. Become. As described above, according to the fifth aspect of the present invention, the tilting position of the cutting machine body is fixed with a simple configuration such as tightening and releasing the tightening belt to the brake shoe by operating the operating member, and the cutting machine body is tilted to the left and right. It can be switched to a possible state.
A sixth invention is a tabletop cutting machine according to any of the third to fifth inventions, wherein the brake shoe is formed into a ring shape from a resin. According to the sixth aspect of the invention, it is easy to generate an appropriate frictional force on the brake drum by giving the brake shoe appropriate elasticity. In addition, the brake shoe can be easily manufactured and the cost can be reduced. The brake shoe can be formed using, for example, a polyamide resin as a material.
A seventh invention is a tabletop cutting machine according to any one of the third to sixth inventions, wherein the brake shoe is provided with a slit that allows deformation in the reduced diameter direction. According to the seventh aspect of the present invention, the brake shoe can be easily deformed in the diameter reducing direction, and a reliable pressing state against the brake drum can be realized.
According to an eighth invention, in any one of the third to seventh inventions, a taper surface is provided on an inner periphery of the brake shoe, and the brake shoe is axially moved from the brake drum generated by pressing the taper surface against the brake drum. This is a tabletop cutting machine configured to restrict the rotation of the tilting side support member relative to the fixed side support member by a tension force that is separated from each other.
According to the eighth aspect of the invention, a part of the radial pressing force of the brake shoe against the brake drum acts as an axial force (a tension force) that displaces the brake shoe in a direction away from the brake drum via the tapered surface. . For this reason, rotation of the brake drum with respect to the brake shoe is regulated not only by the frictional force caused by pressing in the radial direction but also by this axial tension force, so that the rotation of the tilt side support member with respect to the fixed side support member is more firmly regulated. Thus, the inclined position of the cutting machine main body is more securely fixed.

It is a right view of the tabletop cutting machine provided with the inclination position fixing device concerning this embodiment. It is a perspective view of the main body support part provided with the inclination position fixing device concerning this embodiment. This figure has shown the state seen from the diagonally right front. It is the front view which looked at the main-body support part from the direction of arrow (III) in FIG. This figure has shown the locked state of the inclination position fixing device. It is the front view which looked at the main-body support part from the direction of arrow (III) in FIG. This figure shows the unlocked state of the tilt position fixing device. It is the right view which looked at the main-body support part from the arrow (V) direction in FIG. FIG. 4 is a cross-sectional view taken along line (VI)-(VI) in FIG. 3, and is a vertical cross-sectional view of a main body support portion. This figure is a longitudinal sectional view as seen from the left side as seen from the user. Therefore, the front-rear direction is opposite to that in FIG. It is the rear view which looked at the fixed side support member from the back side, as shown by arrow (VII) in FIG. It is a perspective view of an operation member. It is the perspective view which looked at the operation member from the arrow (IX) direction in FIG. It is a disassembled perspective view of a stationary-side support member. This figure has shown the state which looked at the fixed side support member from diagonally right rear. It is a perspective view of a single brake shoe. This figure is a perspective view seen from the front side. It is a perspective view of a single brake shoe. This figure is a perspective view seen from the rear side as indicated by an arrow (XII) in FIG. FIG. 11 is a sectional view taken along the line (XIII)-(XIII) in FIG. 10 and is a longitudinal sectional view of the brake shoe.

Next, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a tabletop cutting machine 1 according to this embodiment. In FIG. 1, the user is located on the left side of the tabletop cutting machine 1. In the following description, with respect to the front-rear direction of the member or configuration, the front side (left side in FIG. 1) viewed from the user is the front side, and the side away from the user (right side in FIG. 1) is the back side. The left and right direction is used with reference to the user. The front-rear direction, the left-right direction, and the up-down direction are appropriately displayed in the drawings.
The tabletop cutting machine 1 includes a generally circular table 20 on which the cutting material W is placed, a base 30 that supports the table 20 so as to be horizontally rotatable, and a main body support 40 provided at the rear of the table 20. The cutting machine main body 10 is provided above the table 20. The present embodiment has a feature with respect to the main body support portion 40, and the other basic configuration of the cutting machine main body 10 is sufficient as in the conventional case, and thus detailed description thereof is omitted.
The rotational position of the table 20 is positioned quickly and accurately in accordance with the work by a two-system stopper mechanism. In the drawing, reference numerals 21 and 22 denote operation levers of these two systems of stopper mechanisms. Both the operating levers 21 and 22 are arranged at the front end portion of the table 20 at positions where the user can easily operate.
The left and right side portions of the base 30 protrude to the side of the table 20, and the protruding portions are pedestal portions 31, 31. The upper surfaces 31 a and 31 a of the left and right pedestal portions 31 and 31 are flush with the upper surface of the table 20. The positioning fence 32 is attached in a state straddling between the upper surfaces 31a, 31a of the left and right pedestal portions 31, 31. The front surface of the positioning fence 32 is a positioning surface 32a with which the cutting material W comes into contact. The positioning surface 32 a coincides with the rotation center of the table 20 and is orthogonal to the upper surface of the table 20.
The cutting machine main body 10 is supported via a main body support portion 40 so as to be slidable back and forth and tilted up and down. As shown in FIG. 1, the position where the cutting machine main body 10 is returned to the upper moving end is the standby position. The cutting blade main body 10 is moved downward from the standby position, and then the cutting machine main body 10 is slid rearward, whereby the rotary blade 12 can be cut into the cutting material W and cut.
Further, the cutting machine body 10 rotates the table 20 leftward or rightward by an appropriate angle so that the cutting angle of the rotary blade 12 with respect to the cutting material W is swung leftward or rightward when viewed in plan. Can be changed. Hereinafter, this cutting form is called angle cutting. In this angle cutting, the rotation axis of the rotary blade 12 (axis of the spindle 18) is maintained parallel to the upper surface of the table 20 (table surface direction). Further, in this angle cutting, the rotary blade 12 is cut in a direction inclined with respect to the positioning surface 32 a of the positioning fence 32. The rotary blade 12 is cut in a direction orthogonal to the positioning surface 32a, thereby making a right angle cut. This right angle cut is most often used.
On the other hand, the cutting machine main body 10 is tilted leftward or rightward by a left / right tilt mechanism 50 of the main body support 40 described later, so that the rotary blade 12 is cut into the cutting material W when viewed from the front (user side). On the other hand, cutting can be performed by cutting diagonally. Hereinafter, this cutting form is referred to as inclined cutting. In this inclined cutting, the rotation axis of the rotary blade 12 is maintained in a state not parallel to the upper surface (table surface direction) of the table 20. In a state where the rotation axis of the rotary blade 12 is positioned parallel to the upper surface of the table 20 and the rotary blade 12 is positioned vertically (tilt angle is zero degrees), a right angle cut is made.

The main body support section 40 includes upper and lower two-stage slide mechanisms 41 and 42 that support the cutting machine main body 10 so as to be slidable back and forth, and a left-right tilt mechanism 50 that tilts the cutting machine main body 10 left and right when viewed from the user. Yes. The lower lower slide mechanism 41 includes two lower slide bars 41a and 41a that are supported in parallel at a constant interval on the left and right. Both lower slide bars 41a and 41a are supported so as to be slidable back and forth via bearings (not shown) attached to the lower surface of the table 20, respectively. A left / right tilt mechanism 50 is attached to the rear ends of the lower slide bars 41a, 41a.
The upper slide mechanism 42 also includes a pair of left and right upper slide bars 42a and 42a that are parallel to each other. Both upper slide bars 42a and 42a are supported by bearings 44 so as to be slidable in the front-rear direction. Both bearings 44, 44 are held by a bearing holder 45 provided on the upper portion of the support arm portion 57. The front end portions of the upper slide bars 42 a and 42 a are coupled to each other by a main body bracket 46. The cutting machine main body 10 is supported by the main body bracket 46 through the vertical tilt shaft 11 so as to be tiltable up and down.
Further, the rear end portions of the upper slide bars 42 a and 42 a are coupled to each other by a connecting bracket 47. Accordingly, the upper slide bars 42a and 42a slide back and forth together while being fixed in parallel to each other. As the upper slide bars 42a and 42a slide back and forth, the cutting machine body 10 slides back and forth. An upper slide fixing screw 48 is provided on the side portion of the bearing holder 45. When the upper slide fixing screw 48 is tightened, the upper slide bars 42a and 42a are fixed to the bearing holder 45 in a non-slidable state, so that the sliding operation by the upper slide mechanism 42 of the cutting machine body 10 is locked. Become. By loosening the upper slide fixing screw 48, the cutting machine body 10 can be slid back and forth by the upper slide mechanism 42.
The cutting machine main body 10 includes a main body case 15 supported by the main body bracket 46 so as to be able to tilt up and down via the left and right tilt shaft 11, and an electric motor 16 attached to the back surface (front side in FIG. 1) of the main body case 15. A circular rotary blade 12 that rotates using the electric motor 16 as a drive source is provided. A semi-circular fixed cover portion 13 is provided at the front portion of the main body case 15. A spindle 18 is rotatably supported at the lower portion of the fixed cover portion 13. A rotary blade 12 is attached to the spindle 18. The upper half circumference of the rotary blade 12 is covered with the fixed cover portion 13. The lower half circumference of the rotary blade 12 is covered with a movable cover 14 that can be opened and closed. On the back side of the main body case 15, a horizontal handle portion 17 that is gripped by the user is provided. In addition, a dust collection port 19 for attaching a dust collection bag or the like for collecting cutting powder is provided at the rear part of the main body case 15.
Thus, by the main body support portion 40 provided with the two-stage upper and lower slide mechanisms 41 and 42 and the left-right tilt mechanism 50, the cutting machine main body 10 can be tilted up and down and slidable with a long stroke in the front-rear direction. Are supported independently to be tiltable in the left-right direction.

Details of the main body support portion 40 and the left-right tilt mechanism 50 are shown in FIG. The left-right tilt mechanism 50 of this embodiment includes a fixed-side support member 52 and a tilt-side support member 53 that are coupled to each other via a left-right tilt shaft 51 so as to be rotatable. The rear end portions of the lower slide bars 41 a and 41 a are coupled to the fixed side support member 52. For this reason, the left and right lower slide bars 41a, 41a are integrally slid back and forth in a mutually parallel state, whereby the cutting machine body 10 is slid back and forth.
The cutting machine main body 10 can be tilted left and right by the tilting side support member 53 rotating to the left or right by a fixed angle about the left and right tilt shaft 51 with respect to the fixed side support member 52. Between the fixed side support member 52 and the tilt side support member 53, a positioning mechanism (so-called positive lock mechanism) for positioning the cutting machine main body 10 at a right angle cutting position or a 45 ° inclination position is incorporated. Since the right-angle positioning mechanism and the tilt positioning mechanism are conventionally known techniques, description thereof is omitted.
Further, the left / right tilt mechanism 50 of the present embodiment includes a tilt positioning mechanism of a different system from the tilt positioning mechanism described above. As shown in FIGS. 2 to 5, a positioning pin 35 is provided on the front side upper portion of the fixed-side support member 52. The positioning pin 35 is urged by the compression spring 36 in the direction of moving rearward in the axial direction (lock side). When the positioning pin 35 moves to the lock side, the taper portion 35a provided at the rear end thereof is inserted into the positioning hole provided in the tilting side support member 53, and the rotation position of the tilting side support member 53 with respect to the fixed side support member 52 is extended. The tilt angle of the cutting machine body is locked. A plurality of positioning holes are provided in the tilt side support member 53 in correspondence with, for example, the left and right tilt angles 22.5 ° and 33.9 ° of the cutting machine body 10. The locking position and the unlocking position of the positioning pin 35 are switched depending on the position of the leaf spring 37 engaged with the front end portion thereof. The position of the leaf spring 37 is switched between two positions in the front-rear direction by a fixing lever 38 provided on the right side of the fixed-side support member 52. When the fixing lever 38 is tilted back and forth, the cam portion 38a provided integrally therewith can be rotated to switch the leaf spring 37 between the upright locked position and the unlocked position tilted forward. When the leaf spring 37 is moved to the former locking position by the locking operation of the fixing lever 38, the positioning pin 35 is moved to the rearward locking position by the compression spring 36, whereby the inclined position of the cutting machine body 10 is locked. When the leaf spring 37 is moved to the latter unlock position by the unlocking operation of the fixing lever 38, the positioning pin 35 moves to the front unlock position against the compression spring 36, and the positioning is released. The locking operation and unlocking operation of the fixing lever 38 are held by the leaf spring 37 and have a moderate feeling of moderation with respect to the tilting operation. Each figure shows a state in which the fixing lever 38 is unlocked.

The rotation position of the tilt side support member 53 with respect to the fixed side support member 52 and the positioning position by each of the positioning mechanisms described above, and the right angle cutting position or the left or right tilt position of the cutting machine body 10 are fixed to the tilt position. Fixed by the device 60. The present embodiment has an unprecedented feature regarding the inclined position fixing device 60.
The tilt position fixing device 60 of this example illustrates a fixing lever as the operation member 61, and is locked and unlocked by tilting the lever to the left and right. The lock position and unlock position of the operation member 61 are held by a toggle mechanism described below.
The operation member 61 is supported on the front surface of the lever base 63 attached along the upper part from the right side of the tilt side support member 53 so as to be tiltable right and left via the lever support shaft 62. 8 and 9, the operation member 61 is shown alone. The operation member 61 includes a gripping portion 61a that is gripped by the user on one end side. An operation wall portion 61c is integrally provided on the opposite side of the support hole 61b through which the lever support shaft 62 of the operation member 61 is inserted from the grip portion 61a. An upper projection 61d and a lower projection 61e are integrally provided on the back surface of the working wall 61c with a certain distance from each other.
On the left side of the lever base 63, a spring accommodating portion 63a is provided. A compression spring 64 is accommodated in the spring accommodating portion 63a. The left end of the compression spring 64 is in contact with the bottom of the spring accommodating portion 63a. A first link lever 65 is inserted into the right end portion of the compression spring 64. The first link lever 65 is urged to the right by a compression spring 64. A second link lever 66 is coupled to the right end portion of the first link lever 65 via a support shaft 65a so as to be relatively rotatable up and down. A third link lever 67 is coupled to the right end portion of the second link lever 66 via a support shaft 66a so as to be relatively rotatable up and down. A receiving projection 67b for receiving the second link lever 66 from below is provided at a left end portion of the third link lever 67 so as to protrude to the left. The right end portion of the third link lever 67 is coupled to the lever base 63 via a support shaft 67a so as to be vertically rotatable.
As shown in the drawing, the second link lever 66 and the third link lever 67 pass between the upper projection 61d and the lower projection 61e of the operation member 61, and the right end portion of the first link lever 65 and the operation wall portion 61c. It spans between the right end and the vicinity.

Therefore, as shown in FIG. 3, when the operation member 61 is tilted to the lock position (left side), the upper protrusion 61d causes the vicinity of the coupling portion between the second link lever 66 and the third link lever 67 (near the support shaft 66a). When pushed downward, both link levers 66 and 67 bend in a direction (V-shape) that protrudes downward. Both link levers 66 and 67 are held in this bent state by the biasing force of the compression spring 64 acting via the first link lever 65. As a result of the second link lever 66 and the third link lever 67 being bent in a downward projecting direction, the first link lever 65 can be displaced to the right. As a result, the first link lever 65 is biased by the compression spring 64. Is held in a state displaced to the right side. A belt hooking claw 65b is provided at the right end portion of the first link lever 65 so as to protrude downward. One end 70a of the fastening belt 70 is hooked on the belt hooking claw 65b. As will be described later, when the first link lever 65 is displaced to the right side by the urging force of the compression spring 64 by the locking operation of the operation member 61, the belt hooking claw 65b is displaced to the right together with this, and the fastening belt 70 is thereby tightened. It is done.
On the other hand, when the operation member 61 is tilted to the unlock side (right side) as shown in FIG. 4, the lower protrusion 61e causes the vicinity of the coupling portion of the second link lever 66 and the third link lever 67 (near the support shaft 66a). ) And the portion bent in the downward convex direction is pushed upward from below. At this time, as a result of the second link lever 66 being received from below by the receiving projection 67b of the third link lever 67, the second link lever 66 and the third link lever 67 pass through a position where they are connected in a straight line, and the coupling portion thereof. The connection state is slightly bent in the direction (mountain shape) where the vicinity (in the vicinity of the support shaft 66a) is convex upward. As a result of the displacement of the second link lever 66 and the third link lever 67 from a connection state bent in a V shape on the lower side to a connection state slightly bent in a mountain shape on the upper side after passing through a straight line, both link levers The first link lever 65 retreats to the left against the urging force of the compression spring 64 by the tensioning action of 66 and 67.
In a state where the second link lever 66 and the third link lever 67 are displaced to a position where the second link lever 66 and the third link lever 67 are slightly bent in a mountain shape, the connecting portion (support shaft 66a) of both the link levers 66 and 67 is connected to the first link lever 65 and the first link lever 65. The second link lever 66 is slightly displaced upward from the line connecting the connecting portion (support shaft 65a) of the third link lever 67 and the connecting portion (support shaft 67a) of the third link lever 67 to the operation member 61, thereby the second link. The upper bent state of the lever 66 and the third link lever 67 is held by the urging force of the compression spring 64.
In this way, by the toggle mechanism configured by changing the bending state of the second link lever 65 and the third link lever 67 up and down, the operation member 61 is held at the left lock position and the right unlock position, and The first link arm 65 is held at the locked position shown in FIG. 3 and the unlocked position shown in FIG.

As shown in FIGS. 2 to 4, the fastening belt 70 with one end 70 a hooked on the belt hooking claw 65 b of the first link lever 65 is wound around the outer periphery of the brake shoe 71 attached to the fixed side support member 52. It is wound. The other end 70 b of the fastening belt 70 wound around the brake shoe 71 is hooked and fixed on the left end side of the lever base 63. In the present embodiment, a belt-shaped stainless steel plate is used as the fastening belt 70.
In the present embodiment, the brake shoe 71 is formed in an annular shape using a polyamide resin as a material. As shown in FIG. 10, an annular shoe base 72 is attached by screws 73 to 73 along the rear surface side periphery of the stationary support member 52, and the brake shoe 71 is attached along the rear surface of the shoe base 72. ing. The brake shoe 71 is fixed to the shoe base 72 with screws 74 to 74. Reference numeral 71a in the figure indicates a screw hole into which the screw 74 is tightened. In this example, the brake shoe 71 is fixed by four screws 74 to 74.
As shown in FIGS. 11 to 13, the brake shoe 71 is formed with a large number of slits 71 b to 71 b at regular intervals in the circumferential direction. Each slit 71b is cut and formed from the front side of the brake shoe 71 with the same width and depth. The slits 71b to 71b allow the brake shoe 71 to be deformed in the reduced diameter direction. Further, as shown in FIG. 13, a tapered surface 71 c is formed on the entire rear surface of the brake shoe 71.
A brake drum 75 is integrally provided on the front surface side of the tilt support member 53 with respect to the brake shoe 71 attached to the rear surface side of the fixed support member 52 in this way. The brake drum 75 is integrally formed in a cylindrical shape along the front surface side periphery of the tilting support member 53. In a state where the brake shoe 71 is housed on the inner peripheral side of the brake drum 75, the tilt side support member 53 is coupled to the fixed side support member 52 so as to be rotatable via the left and right tilt shaft 51.
A tapered surface 75 a that faces the tapered surface 71 c of the brake shoe 71 is formed on the entire bottom surface of the brake drum 75.
As shown in FIGS. 2 and 3, when the brake shoe 71 is deformed in the diameter-reducing direction by tightening the tightening belt 70 by the locking operation of the operation member 61, the tapered surface 71c is pressed against the tapered surface 75a of the brake drum 75 over the entire circumference. It is done. When the taper surface 71 c of the brake shoe 71 is pressed against the taper surface 75 a of the brake drum 75, an axial tension force acts on the brake drum 75 and thus the tilt side support member 53 in addition to the frictional force in the reduced diameter direction. As a result, the rotational position of the tilt side support member 53 with respect to the fixed side support member 52, and hence the tilt position of the cutting machine main body 10, is firmly fixed (the tilt position fixing device 60 is locked).
On the other hand, when the tightening of the tightening belt 70 to the brake shoe 71 is released by the unlocking operation of the operation member 61 as shown in FIG. Become. When the brake shoe 71 is returned to the free state, the pressing of the taper surface 71c against the taper surface 75a of the brake drum 75 is released, so that the tilt side support member 53 is rotatable with respect to the fixed side support member 52. Thus, the cutting machine body 10 can be tilted leftward or rightward (the unlocked state of the tilt position fixing device 60).

According to the tabletop cutting machine 1 of the present embodiment including the tilt position fixing device 60 configured as described above, an operation member for operating the tilt position fixing device 60 for fixing the tilt position of the cutting machine body 10. 61 is provided not on the rear surface (back surface) of the main body support portion 40 as in the prior art, but on the right side portion closer to the user. Thus, the user can reach out to the operation member 61 with a more comfortable posture than before, and in this respect, the operability of this kind of tilted position fixing device 60 can be improved as compared with the prior art.
Further, since the operation member 61 is provided not on the back side of the main body support portion 40 but on the right side portion that is easily visible to the user, the operation member 61 does not take a cramped posture such that the user looks into the back side. It is possible to check this with the eyes and reach out to this, and the operability of the inclined position fixing device 60 can be enhanced in this respect as well.
Further, the operation direction of the operation member 61 is the left-right direction. If the operation direction of the operation member is set to the front-rear direction, the user needs to reach farther for the backward operation, but if the operation direction is the left-right direction, the user must move the hand in any direction. Since the extending distance is substantially the same, the operability of the operation member 61 can be further improved in this respect.
Further, with respect to the inclined position fixing device 60, by fixing the tightening belt 70 to the annular brake shoe 71 and deforming it, the fixed side support member is caused by the friction force generated by pressing the brake shoe 71 against the cylindrical brake drum 75. Since the tilt position of the cutting machine body 10 is fixed by restricting the rotation of the tilt side support member 53 with respect to 52, the tilt position fixing device 60 is compact between the fixed side support member 52 and the tilt side support member 53. It is possible to suppress the increase in size of the main body support portion 40 by being incorporated into the main body.
Further, the ring-shaped brake shoe 71 is deformed by tightening the tightening belt 70 and is pressed against the ring-shaped brake drum 75. The brake shoe 71 is pressed against the brake drum with a uniform and large pressing force in the radial direction and the axial direction. Since the inclined position fixing device 60 can be pressed in the direction, the inclined position of the cutting machine body 10 can be reliably fixed with a simple configuration.
Furthermore, both the tightening state and the tightening release state of the tightening belt 70 are held by the urging force of the compression spring 64 via the toggle mechanism, and as a result, the fixed state of the inclined position of the cutting machine body 10 is reliably locked.
Further, since the brake shoe 71 is made of a polyamide resin having moderate elasticity and wear resistance, it is easy to generate an appropriate frictional force against the brake drum 75, and the tilt position fixing device The cost can be reduced by 60.
Further, the brake shoe 71 is provided with a large number of axial slits 71b to 71b along the periphery thereof. For this reason, the deformation of the brake shoe 71 in the diameter reducing direction is facilitated, and the brake drum 71 is reliably pressed against the brake drum 75, and as a result, the inclined position fixed state of the cutting machine body 10 can be reliably locked by an appropriate frictional force. it can.
The brake shoe 71 is provided with a tapered surface 71c, and the tapered surface 71c is pressed against the tapered surface 75a on the brake drum 75 side. For this reason, the tightening force of the tightening belt 70 against the brake shoe 71 acts as a frictional force in the rotational direction and a thrust force in the axial direction by the radially outward pressing force through the contact state of both the tapered surfaces 71c and 75a. For this reason, the rotation of the brake drum 75 with respect to the brake shoe 71 is restricted not only by the frictional force caused by the pressing in the radial direction but also by the axial tension force, so that the rotation of the tilt side support member 53 with respect to the fixed side support member 52 is prevented. The inclined position of the cutting machine body 10 is more securely fixed by being more firmly regulated.

Various modifications can be made to the embodiment described above. For example, the lever-type operation member 61 is illustrated, but it can be changed to a rotary dial type or slide operation type operation member.
Moreover, although the structure which has arrange | positioned the fixed lever as the operation member 61 in the right side part of the main body support part 40 was illustrated, it is good also as a structure arrange | positioned in the left side part or the front side. By disposing the operation member on the right side, left side, or front side of the main body support portion 40 that is difficult to be seen by the user, the operation member can be easily seen by the user. Since it can be held in a proper posture, the operability of the tilt position fixing device can be improved.
Further, the configuration in which the operation member 61 is held in the locked position and unlocked position and the tightened belt 70 is held in the tightened state and the tightened released state by using the toggle mechanism is exemplified. However, other holding such as a detent mechanism or a cam mechanism is exemplified. It is good also as a structure using a means.
Further, the configuration is shown in which the tightening belt 70 is fastened to the brake shoe 71 to deform the brake shoe 71 and thereby the inclined position of the cutting machine body 10 is locked by the frictional force and the pushing force generated by being pressed against the brake drum 75. However, the same effect can be obtained by replacing the inclined position fixing means with a completely different configuration and disposing the operation member on the right side, left side, or front side of the main body support.
Moreover, although the tabletop cutting machine provided with the upper and lower two-stage slide mechanisms 41 and 42 has been exemplified, the present invention can be similarly applied to a tabletop cutting machine that does not include the slide mechanism.

W ... Cutting material 1 ... Desk cutting machine 10 ... Cutting machine body 11 ... Vertical tilting shaft 12 ... Rotating blade 13 ... Fixing cover part 14 ... Moving cover 15 ... Main body case 16 ... Electric motor 17 ... Handle part 18 ... Spindle 19 ... Dust port 20 ... Tables 21 and 22 ... Control lever 30 ... Base 31 ... Base part 32 ... Positioning fence 32a ... Positioning surface 35 ... Positioning pin 36 ... Compression spring 37 ... Plate spring 38 ... Fixing lever 40 ... Body support part 41 ... Lower slide mechanism, 41a ... Lower slide bar 42 ... Upper slide mechanism, 42a ... Upper slide bar 44 ... Bearing 45 ... Bearing holder 46 ... Body bracket 47 ... Connection bracket 48 ... Upper slide fixing screw 50 ... Left / right tilt mechanism 51 ... Left / right tilt Shaft 52 ... fixed side support member 53 ... tilt side support member 57 ... support arm portion 60 ... tilted position fixing device 61 ... operation member DESCRIPTION OF SYMBOLS 1a ... Holding part, 61b ... Support hole, 61c ... Actuation wall part 61d ... Upper projection part, 61e ... Lower projection part 62 ... Lever support shaft 63 ... Lever base, 63a ... Spring accommodating part 64 ... Compression spring 65 ... First link Lever, 65a ... support shaft, 65b ... belt hooking claw 66 ... second link lever, 66a ... support shaft 67 ... third link lever, 67a ... support shaft, 67b ... receiving projection 70 ... tightening belt, 70a ... one end 71 ... Brake shoe, 71b ... Slit, 71c ... Tapered surface 72 ... Shoe base 73, 74 ... Screw 75 ... Brake drum, 75a ... Tapered surface

Claims (8)

Tabletop cutting with a table on which a cutting material is placed, and a cutting machine main body that can be moved up and down via a main body support provided on the table and that can be changed in the left and right tilt positions as viewed from the user Machine,
The main body support part includes a fixed side support member on the table side, a tilt side support member on the cutting machine main body side, a left and right tilt shaft that couples the two support parts to each other, and the fixed side support member. An inclination position fixing device for restricting rotation of the tilting side support member with respect to and fixing a right and left inclination position of the cutting machine body,
A tabletop cutting machine provided with an operation member for operating the tilt position fixing device on a front surface, a left side portion, or a right side portion excluding a rear side of the main body support portion. The tabletop cutting machine according to claim 1, wherein an operation direction of the operation member is a left-right direction. 3. The tabletop cutting machine according to claim 1, wherein the tilt position fixing device has a cylindrical brake drum provided on one of the fixed side support member and the tilt side support member and an annular shape provided on the other side. A brake shoe is provided, and the tilt position of the cutting machine body is fixed by restricting the rotation of the tilt side support member relative to the fixed side support member by the frictional force generated by pressing the brake shoe against the brake drum. Tabletop cutting machine. 4. The tabletop cutting machine according to claim 3, wherein a tightening belt is tightened around the brake shoe to press the brake shoe against the brake drum. 5. The tabletop cutting machine according to claim 4, wherein the inclined position fixing device winds the fastening belt around the brake shoe, fixes one end of the fastening belt to the one, and the other end is spring-biased. A tabletop cutting machine configured to be connected to the operation member via a toggle mechanism. The tabletop cutting machine according to claim 3, wherein the brake shoe is formed in a ring shape from a resin. The tabletop cutting machine according to any one of claims 3 to 6, wherein the brake shoe is provided with a slit that allows deformation in the diameter reducing direction. The tabletop cutting machine according to any one of claims 3 to 7, wherein a taper surface is provided on an inner periphery of the brake shoe, and the brake drum is generated by pressing the brake drum against the taper surface. A tabletop cutting machine configured to restrict rotation of the tilting side support member with respect to the fixed side support member by a tension force that separates the shoe in the axial direction.

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