JP2015123542A - Tabletop cutting tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tabletop cutting tool performing a cutting process by vertically moving a cutting tool body with respect to a material to be cut placed on the table, including a positioning fence for positioning the material to be cut on a table in a table face direction, and improve the usability of a tabletop cutting tool by locating a positioning face at a range extremely near to a rotary cutter and retracting the positioning face significantly in a case of an oblique cutting.SOLUTION: A tabletop cutting tool comprises a base part 53 unmovably fixed to the upper part of a table, a second movable fence 52 slidable from side to side, and a first movable fence 51 vertically turnably supported by the second movable fence 52. The cutting tool is configured to select any of a state of upwardly turning and retracting only the first movable fence 51 and a state of retracting both the first and second movable fences 51 an 52.

Description

  The present invention relates to a tabletop cutting tool for cutting a cutting material placed on a table.

In this type of cutting tool, a positioning fence for positioning a cutting material on a table is provided. The cutting material is brought into contact with the positioning surface of the positioning fence to position the cutting material on the table. In many cases, this positioning fence is arranged on the left and right with respect to the cutting blade, and in order to realize stable cutting processing, the positioning surface is improved so that it is as close as possible to the cutting blade (cutting site). Has been added.
On the other hand, for this type of cutting tool, it is possible to perform inclined cutting by inclining the tool body part to the left or right and cutting the cutting blade obliquely with respect to the cutting material, or the table to the left or right It is provided with a function that makes it possible to perform an oblique cutting that is rotated obliquely and cut obliquely when viewed in plan view. When performing this inclination cutting etc., a cutting blade inclines to the left or the right side seeing from a user, and the relative position with respect to a positioning fence changes. For this reason, in order to avoid interference with the cutting blade, a conventional positioning fence is provided in which a part of the positioning surface is movable and can be retracted in a direction away from the cutting blade. Conventional techniques relating to such a movable positioning fence are described in the following patent documents.
Patent Document 1 discloses a technique in which a part of a positioning surface can be slid in the left-right direction and retracted, and Patent Documents 2 and 3 enable retraction by rotating a part of the positioning surface up and down. A technique is disclosed, and Patent Document 4 discloses a technique in which a part of the positioning surface is a slide type, and a rotary positioning surface is further provided on the slide receiving surface. According to these conventional techniques, when the cutting blade is inclined, for example, the cutting blade is positioned at a right angle by allowing a part of the positioning surface to be retracted to a position where it does not interfere with the cutting blade. Sometimes, the positioning surface can be positioned as close to the cutting blade as possible to perform more stable cutting.

JP 2009-255273 A Japanese Patent Laid-Open No. 2006-16785 JP-A-9-103913 US Pat. No. 5,755,148

However, there is a desire to make the positioning surface of the positioning fence even closer when cutting at right angles with the cutting blade positioned at right angles. However, there was a problem that it was not possible to cope with a sufficient inclination angle of the cutting blade.
The present invention has been made to solve the conventional problems, and the positioning surface of the positioning fence can be brought closer to the cutting blade when cutting at right angles, while it is retracted larger than before when tilting cutting. It is an object to enable a part or the whole of a positioning surface to be retracted by an amount.

Said subject is solved by each following invention.
The present invention is a tabletop cutting tool provided with a table for placing a cutting material, a tool main body supported by the table, and a positioning fence for positioning the cutting material placed on the table in contact with the table surface. is there. In this invention, the positioning fence is provided with the 1st and 2nd movable fence which can each be moved with respect to a base part and a base part. In the present invention, a positioning surface is provided for positioning the cutting member in contact with at least one of the base, the first movable fence, and the second movable fence in the table surface direction. In the present invention, the first movable fence can be rotated independently of the movement of the second movable fence.
According to the present invention, only the first movable fence is rotated and moved from the use position to the retracted position, and both the first and second movable fences are moved from the use position to the retracted position. Therefore, it is possible to perform the cutting process by positioning the positioning fence at a position as close as possible within a range that does not interfere with the cutting blade.
In the present invention, the second movable fence can be a tabletop cutting tool supported so as to be slidable in the left-right direction with respect to the base portion.
In the present invention, the second movable fence can be a tabletop cutting tool supported directly on the base portion.
In this invention, it can be set as the desktop cutting tool which has a positioning surface in a 2nd movable fence.
According to such a configuration, by positioning the second movable fence at the use position, the cutting material can be brought into contact with the positioning surface and positioned in the table surface direction.
In this invention, it can be set as the desktop cutting tool which has a positioning surface in a base part. According to such a configuration, the cutting material can be brought into contact with the positioning surface of the base portion and positioned in the table surface direction.
In this invention, it can be set as the desktop cutting tool by which the 2nd movable fence was supported by the upper part of the base part. According to the structure which concerns, the height of a positioning fence can be changed. By lowering the height of the positioning fence, it is possible to avoid interference with the cutting machine main body at the time of inclined cutting, and thus the inclination angle of the cutting machine main body can be set large.
In the invention of any one of the first to sixth aspects, the second movable fence can be a tabletop cutting tool configured to be movable to a retreat position that is not higher than the first movable fence.

It is a left view of the whole tabletop cutting tool concerning this embodiment. This figure has shown the state which has located the tool main-body part at the top dead center. It is a right view of the whole tabletop cutting tool concerning this embodiment. This figure has shown the state which has located the tool main-body part at the top dead center. It is a (III) arrow line view in Drawing 1, and is a front view of the tabletop cutting tool concerning this embodiment. FIG. 1 (IV) is a rear view of the tabletop cutting tool according to the present embodiment, as viewed from the arrow. It is a left view of the whole tabletop cutting tool. This figure has shown the state which has located the tool main-body part in the bottom dead center. It is a right view of the whole tabletop cutting tool. This figure has shown the state which has located the tool main-body part in the bottom dead center. It is a (VII) arrow line view in FIG. 5, Comprising: It is a top view of the desktop cutting tool whole. It is a front view of the whole tabletop cutting tool. This figure has shown the state which inclined the tool main-body part to the left side. It is a rear view of the whole tabletop cutting tool. This figure has shown the state which inclined the tool main-body part to the left side. It is a whole perspective view of a positioning fence simple substance. In this figure, the state where both the 1st and 2nd movable fences are located in a use position is shown. FIG. 14 is a cross-sectional view taken along line (XI)-(XI) in FIG. 13 and is a vertical cross-sectional view of the positioning fence. It is a front view of a positioning fence. This figure has shown the state which both the 1st and 2nd movable fences are located in a use position. It is a rear view of a positioning fence. This figure has shown the rear view of the positioning fence of the state shown in FIG. It is a front view of a positioning fence. This figure has shown the state which moved the 1st movable fence to the disengagement position. It is a rear view of a positioning fence. This figure has shown the rear view of the positioning fence of the state shown in FIG. It is a front view of a positioning fence. This figure has shown the state which moved the 1st movable fence to the retracted position. It is a rear view of a positioning fence. This figure has shown the rear view of the positioning fence of the state shown in FIG. It is a front view of a positioning fence. This figure has shown the state which moved both the 1st and 2nd movable fence to the retracted position. It is a rear view of a positioning fence. This figure has shown the rear view of the positioning fence of the state shown in FIG. It is a longitudinal cross-sectional view of an illuminating device.

Next, an embodiment of the present invention will be described with reference to FIGS. In FIG. 1, the user is located on the right side of the tabletop cutting tool 1. In the following description, the direction of front and rear, left and right, up and down, etc. will be used with reference to the user.
As shown in FIGS. 1-7, the tabletop cutting tool 1 which concerns on this embodiment is the table 20 which mounts the cutting material W, The base 30 which supports the table 20 rotatably in the left-right direction (horizontal direction), The tool body 10 is supported via a body support 40 provided at the rear of the table 20 so as to be swingable up and down and slidable back and forth.
At the front portion of the table 20, there are arranged two systems of lock mechanisms for locking the rotational position of the table 20, lock release levers 21 and 22 for releasing the lock mechanism, and the like. The base 30 is provided with a pair of left and right auxiliary table portions 31, 31. The left and right auxiliary table portions 31, 31 are located on the left and right of the table 20. The upper surfaces of the left and right auxiliary table portions 31 and 31 and the upper surface of the table 20 are accurately set to be flush with each other. A large cutting material W straddling between the left and right auxiliary table portions 31 can be placed in a stable state.
Holders 32, 32 are provided on the left and right auxiliary table portions 31, 31 so as to largely protrude sideways. A cutting aid (not shown) such as an additional table for placing a larger cutting material W can be attached to both the holders 32 and 32. Both holders 32, 32 can be removed by loosening fixing screws 33, 33 provided at the rear of the auxiliary table portions 31, 31.
A positioning fence 50 is mounted between the left and right auxiliary table portions 31, 31. The positioning fence 50 is a member for positioning the cutting material W in the table surface direction, and details thereof will be described later.

The main body support portion 40 is provided integrally with the tilt base portion 41 provided at the rear portion of the table 20, the tilt support portion 42 rotatably coupled to the tilt base portion 41, and upward. A support arm portion 43 that extends, a slide support portion 44 provided on the upper portion of the support arm portion 43, and a swing support that is provided at the tip of the slide support portion 44 and supports the tool body portion 10 so as to be swingable up and down. A portion 45 is provided. Between the tilt base part 41 and the tilt support part 42, the tool main body part 10 is positioned at a right angle cut position shown in FIGS. 3 and 4 or an inclined cut position inclined 45 ° to the left side shown in FIGS. An inclination positioning mechanism is provided internally. It is a rotation center of the tilt support portion 42 with respect to the tilt base portion 41, and the left / right tilt axis of the tool main body portion 10 coincides with the upper surface of the table 20 and coincides with an axis passing through the rotation center of the table 20. The rotation position of the tilt support portion 42 with respect to the tilt base portion 41, and the right angle cutting position or the tilt position of the tool main body portion 10 is fixed by tightening the fixing lever 46.
The slide support portion 44 includes a pair of left and right slide bars 44a, 44a that are parallel to each other and can slide back and forth. A swing support portion 45 is attached to the tip portions of both slide bars 44a and 44a. The tool main body 10 is supported by the swing support 45 via a swing support shaft 47 so as to be swingable (tilted) up and down. By sliding both slide bars 44a, 44a back and forth, the tool body 10 can be slid back and forth within a certain range, and can be tilted up and down within a certain angle range.
The tool main body 10 includes a circular rotary blade 12 that is rotated by an electric motor 11, a blade case 13 that covers the upper side of the rotary blade 12, and a movable cover 14 that covers the lower side of the rotary blade 12. The rear portion of the blade case 13 is supported by the swing support portion 45 via the swing support shaft 47. The electric motor 11 is attached to the back side (right side) of the blade case 13 via the reduction gear unit 16. The reduction gear unit 16 includes a reduction gear train and a gear housing that accommodates the reduction gear train. The rotational output of the electric motor 11 is decelerated by the reduction gear unit 16 and transmitted to a spindle (not shown). A rotary blade 12 is attached to the spindle.
As shown in FIGS. 2 and 6, a plurality of air intake holes are provided on the rear surface of the motor housing of the electric motor 11. When the electric motor 11 is activated, the built-in cooling fan rotates, so that outside air (motor cooling air) is introduced into the motor housing through the intake holes. The introduced motor cooling air flows to the front side in the motor housing, whereby the electric motor 11 is cooled. Further, a motor control controller is built in the rear side of the motor housing. This controller is also cooled by the motor cooling air. A part of the introduced motor cooling air is exhausted to the outside through an exhaust hole provided in the front portion of the motor housing, and the remaining motor cooling air is exhausted into the blade case 13.
On the upper part of the gear housing of the reduction gear part 16, a large handle part 15 provided with a loop-shaped front main handle 15a and a rear sub handle 15b is provided. An activation switch lever 15c is disposed on the inner peripheral side of the main handle 15a.

The positioning fence 50 is provided on the rear side of the table 20. Details of the positioning fence 50 are shown in FIG. The positioning fence 50 has a part located on the right side and a part located on the left side with respect to the rotary blade 12. Hereinafter, the right fence 50R and the left fence 50L are referred to as a distinction. The right fence 50R includes one fixed fence 55. The left side fence 50 </ b> L includes a base portion 53, a first movable member 51, and a second movable member 52. The fixed fence 55 of the right fence 50R and the base 53 of the left fence 50L are coupled to each other via a semi-circular coupling arm section 54. The front surface of the fixed fence 55 of the right fence 50R is a positioning surface 55a for positioning the rear surface of the cutting material W in contact with the entire surface. The positioning surface 55a is processed with high accuracy in terms of its flatness and the perpendicularity to the upper surface of the table 20.
The positioning fence 50 according to the present embodiment has a great feature with respect to the left side fence 50L. The base 53 is formed lower than the fixed fence 55 of the right fence 50R. The right end portion 53b (end portion on the rotary blade side) of the base portion 53 is inclined at an angle larger than 45 °. In this regard, the left end portion 55b (end portion on the rotary blade side) of the fixed fence 55 of the right fence 50R is inclined at a slight angle (for example, about 10 °). Therefore, a large inclination angle is allowed on the left side with respect to the right and left inclination angle of the tool body 10. In the present embodiment, a positioning surface 53 a for contacting and positioning the cutting material W is set for the entire front surface of the base portion 53.

A second movable fence 52 is supported along the upper portion of the base portion 53. The second movable fence 52 has a front surface that is long on the left and right and thin on the top and bottom, and is slidably supported on the left and right. As shown in FIG. 11, guide convex portions 52 b are provided on the lower surface of the second movable fence 52 along the longitudinal direction. The guide convex portion 52 b is inserted into a guide groove portion 53 c provided on the upper surface of the base portion 53, and the second movable fence 52 is supported so as to be slidable right and left along the upper portion of the base portion 53. Yes.
The slide position of the second movable fence 52 can be fixed at an arbitrary position by tightening the thumbscrew 56. In the present embodiment, the entire front surface of the second movable fence 52 is a positioning surface 52a.
The first movable fence 51 is supported on the second movable fence 52. As shown in FIGS. 13, 15, and 17, the first movable fence 51 is integrally provided with a support arm portion 51 d. The first movable fence 51 is supported on the rear surface side of the second movable fence 52 through a support shaft 57 so as to be rotatable up and down. The support shaft 57 is inserted into a long groove hole-shaped support hole 51b provided on the left end (rotation base end side) of the support arm 51d. The first movable fence 51 can be displaced left and right within a range in which the support shaft 57 is relatively movable in the support hole 51b. The first movable fence 51 can be displaced in the left-right direction between the use position shown in FIGS. 12 and 13 and the engagement release position shown in FIGS. When the first movable fence 51 is positioned at the use position as shown in FIGS. 12 and 13, the front surface thereof is flush with the right side of the positioning surface 52 a of the second movable fence 52 and the positioning surface 53 a of the base 53. It becomes a state. In the present embodiment, the front surface of the first movable fence 51 is also the positioning surface 51a with which the cutting material W comes into contact. The positioning surfaces 51a and 52a of the first and second movable fences 51 and 52 and the positioning surface 53a of the base portion 53 form a wide positioning surface having an area substantially equal to that of the right fence 50R.
In a state where the first movable fence 51 is positioned at the use position and the disengagement position, the support arm portion 51 d is set to a thickness that does not protrude from the upper end of the second movable fence 52.

An engaging recess 51 c is provided on the front end of the support arm 51 d of the first movable fence 51 in the longitudinal direction. The engaging recess 51c is formed long in the same direction as the support hole 51b. The engaging recess 51c is opened downward in FIGS. On the other hand, an engagement shaft portion 58 is provided on the back side of the second movable fence 52. The engagement shaft portion 58 is provided so as to protrude rearward. In a state where the first movable fence 51 is rotated downward to be positioned at the use position (position shown in FIG. 13) and the engagement release position (position shown in FIG. 15), the engagement shaft portion 58 is engaged with the engagement recess. It will be in the state which entered in 51c. When the first movable fence 51 is moved to the disengagement position shown in FIG. 15, the engagement shaft portion 58 is relatively displaced to the upper side of the opening of the engagement recess portion 51c and can be pulled out relatively downward. For this reason, the first movable fence 51 can be rotated upward in a state where the first movable fence 51 is moved to the disengagement position.
As shown in FIGS. 16 and 17, the first movable fence 51 can be reversed left and right by rotating 180 degrees around the support shaft 57. As shown in FIGS. 18 and 19, in a state where the first movable fence 51 is inverted to the left side, the second movable fence 52 can be slid to the left side and moved to the retracted position by further loosening the thumbscrew 56. it can. By moving the second movable fence 52 to the retracted position, the height of the left fence 50L of the positioning fence 50 can be lowered to the height of the base portion 53.

Next, an illuminating device 60 for brightly illuminating the cutting part is equipped on the front surface of the swing support part 45 that supports the tool body part 10 for the convenience of cutting work at night or in a dark place. Details of the illumination device 60 are shown in FIG. As shown in FIG. 3, the illuminating device 60 is attached to the right front surface of the swing support portion 45 and to the right of the rotary blade 12 in a front view. The illumination device 60 is disposed below the swing fulcrum (swing support shaft 47) of the tool body 10. By this illuminating device 60, the cutting part (blade edge) is illuminated brightly.
As shown in FIG. 20, this illumination device 60 uses three LEDs 62 to 62 (light emitting diodes) as light sources. The three LEDs 62 to 62 are mounted on the control board 61. The three LEDs 62 to 62 are arranged at three equal positions on the same circumference. Moreover, the three LEDs 62 to 62 are arranged close to each other in a direction (attitude) in which the irradiation directions are parallel to each other.
The three LEDs 62 to 62 are accommodated in the illumination case 63. A transparent cover 64 is attached to the front portion of the lighting case 63. The transparent cover 64 is directed straight to the front side (user side). However, the transparent cover 64 is directed slightly downward.
As shown in FIG. 20, the irradiation direction of the three LEDs 62 to 62 is a direction inclined downward in a side view. The irradiation direction of the three LEDs 62 to 62 is a direction inclined leftward in plan view. For this reason, the rear surface of the control board 61 is visible in FIG.
Thus, the illumination device 60 is attached at a position offset to the right side with respect to the rotary blade 12 in front view, and the three LEDs 62 to 62 are inclined in the irradiation direction downward in a side view and leftward in a plan view. By being accommodated in the lighting case 63 in such a posture, the cutting edge (cutting part) of the rotary blade 12 is efficiently illuminated. In the present embodiment, when a virtual horizontal plane V passing through the lower end surface of the reduction gear unit 16 is assumed in a state where the tool body 10 is moved down to the lower end as shown in FIG. And the irradiation direction of three LED62-62 is set so that it may irradiate toward the blade edge | tip in the area | region S above the upper surface of the table 20. FIG.

According to the desktop cutting tool 1 configured as described above, the positioning fence 50 for positioning the cutting material W on the table 20 includes two movable fences 51 that can be moved between a use position and a retracted position. 52. The 1st movable fence 51 is provided so that rotation up and down is possible, and the 2nd movable fence 52 is provided so that sliding to right and left is possible.
As shown in FIGS. 12 and 13, the first and second movable fences 51 and 52 can be positioned at the use positions in the right-angle cutting operation in which the rotary blade 12 is positioned at a right angle to the table surface. By positioning the first and second movable fences 51 and 52 at the use positions, respectively, the left and right fences 50L and 50R can be brought into a state of being as close as possible to the rotary blade 12, and thereby the cutting material W Positioning can be performed more reliably, and scattering of cutting powder and the like to the rear can be efficiently prevented.
As shown in FIGS. 14 and 15, when the first movable fence 51 is slightly slid to the right and moved to the disengagement position, the engagement shaft portion 58 is relatively displaced in the engagement recess 51c and above the opening. Thus, the first movable fence 51 can be rotated upward.

As shown in FIGS. 16 and 17, the first movable fence 51 can be moved to the retracted position by rotating the first movable fence 51 around the support shaft 57 and reversing it left and right. By moving the first movable fence 51 to the retracted position in this manner, the rotary blade 12 can be inclined and cut by, for example, 45 ° to the left. At this stage, the second movable fence 52 can be cut while being kept in the use position.
As shown in FIGS. 18 and 19, after the first movable fence 51 is moved to the retracted position, the second movable fence 52 can be further slid leftward and moved to the retracted position. By moving the second movable fence 52 to the retracted position, the height of the left fence 50 </ b> R can be substantially reduced to the height of the base portion 53. In this state, as shown in FIGS. 8 and 9, the tool body 10 can be further tilted to the left by a large angle to perform tilt cutting.
As described above, the first movable fence 51 can be moved to the retracted position in a state where the second movable fence 51 is located at the use position. Therefore, only the first movable fence 51 is pivoted upward to move it from the use position to the retracted position, and both the first and second movable fences 51 and 52 are moved from the use position to the retracted position. Therefore, it is possible to perform cutting by positioning the positioning surface as close as possible to the rotary blade 12 within a range that does not interfere with the rotary blade 12 or the tool main body 10.

Various modifications can be made to the embodiment described above. For example, in addition to the first and second movable fences 51, 52, the configuration in which the positioning surface 53 a is set for the base portion 53 is illustrated, but the positioning surface 53 a may be omitted for the base portion 53. In addition, one of the positioning surfaces 51a and 52a of the first and second movable fences 51 and 52 may be omitted. In consideration of the function of the positioning fence 50, in addition to the function of positioning the cutting material W, the first or second movable fence is considered to have a function of preventing the scattering of cutting powder or cutting pieces, etc. A positioning surface is set on one of the front surfaces of 51 and 52 or the base portion 53, and the others can be configured to exhibit the function of preventing scattering of cutting powder and the like.
Moreover, although the structure which set the 1st, 2nd movable fences 51 and 52 was illustrated about the left fence 50L, you may set about the right fence 50R, Furthermore, even if the movable fence illustrated about both right and left sides is set. Good.

DESCRIPTION OF SYMBOLS 1 ... Desktop cutting tool W ... Cutting material 10 ... Tool main body part 11 ... Electric motor 12 ... Rotary blade 13 ... Blade case 14 ... Movable cover 15 ... Handle part 15a ... Main handle, 15b ... Sub handle, 15c ... Switch lever 16 ... Reduction gear part V ... virtual horizontal plane S ... area 20 below virtual horizontal plane V ... tables 21, 22 ... lock release lever 30 ... base 31 ... auxiliary table part 32 ... holder 33 ... fixing screw 40 ... main body support part 41 ... tilting Base part 42 ... Tilt support part 43 ... Support arm part 44 ... Slide support part 44a ... Slide bar 45 ... Swing support part 46 ... Fixed lever 47 ... Swing support shaft 50 ... Positioning fence 50R ... Right side fence, 50L ... Left side fence 51 ... first movable fence 51a ... positioning surface, 51b ... support hole, 51c ... engagement recess, 51d ... support arm 52 ... 2nd movable fence 52a ... Positioning surface, 52b ... Guide convex part 53 ... Base part 53a ... Positioning surface, 53b ... Right end part, 53c ... Guide groove part 54 ... Coupling arm part 55 ... Fixed fence 55a ... Positioning surface, 55b ... Left end portion 56 ... Pinch screw 57 ... Support shaft 58 ... Engagement shaft portion 60 ... Lighting device 61 ... Control board 62 ... LED (light emitting diode)
63 ... Lighting case 64 ... Transparent cover

Claims (7)

A tabletop cutting tool provided with a table for placing a cutting material, a tool main body supported by the table, and a positioning fence for bringing the cutting material placed on the table into contact with each other and positioning in the table surface direction. ,
The positioning fence includes a base portion and first and second movable fences movable relative to the base portion, and at least one of the base portion, the first movable fence, and the second movable fence. A positioning surface for positioning the cutting material in contact with the table in the direction of the table surface,
The first movable fence is a tabletop cutting tool that can be rotated independently of the movement of the second movable fence. The desktop cutting tool according to claim 1, wherein the second movable fence is supported so as to be slidable in a left-right direction with respect to the base portion. The desktop cutting tool according to claim 1 or 2, wherein the second movable fence is directly supported by the base portion. 4. The tabletop cutting tool according to claim 1, wherein the second movable fence has the positioning surface. 5. It is a tabletop cutting tool given in any 1 paragraph of Claims 1-4, Comprising: The tabletop cutting tool which has the above-mentioned positioning surface in the above-mentioned base part. The tabletop cutting tool according to any one of claims 1 to 5, wherein the second movable fence is supported on an upper portion of the base portion. The tabletop cutting tool according to any one of claims 1 to 6, wherein the second movable fence is configured to be movable to a retracted position that is not higher than the first movable fence.

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