JP2007276306A - Groove cutting tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique effective in preventing deposition of chips occurring during cutting of a to-be-worked material with a cutter, in the front area in the cutting direction. <P>SOLUTION: A groove cutting tool 101 includes a cutter 121, a motor 123 driving the rotation of the cutter 121, a body housing 105, a base 103, a display unit 127 displaying the cutting position of the cutter 121, a cutting depth adjusting mechanism 131 adjusting the depth of cutting with the cutter 121 and an air-blowing mechanism 171 blowing the air after cooling of the motor toward the display unit. The air-blowing mechanism 171 is arranged in the body housing 105 and has a blowing passage 173 which blows the cooling air within the body housing 105 into the front of the body housing 105 through the side of a cutting depth adjusting guide 135 and a blowing direction changing section 175 which is provided at a base 103 and guides the cooling air blown from the blowing passage 173 to the display unit 127 in front of the depth adjusting guide. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a grooving tool having a cutter that forms a groove in a workpiece by a cutting operation using a rotary motion, and more particularly to a technique for treating chips generated when a workpiece is cut.

  An example of this type of grooving tool is disclosed in Japanese Utility Model Laid-Open No. 55-42584 (Patent Document 1). The grooving tool described in the publication is configured such that when the base is moved forward in a state where the base is placed on the workpiece, a rotating cutter forms a groove in the workpiece. Above the base, a housing provided with a motor for rotationally driving the cutter is disposed so as to be swingable in the vertical direction together with the cutter, and is formed on the workpiece by swinging the cutter in the vertical direction together with the housing. The depth of the groove, that is, the cutting depth of the cutter can be adjusted. Note that the cutting depth of the cutter is adjusted by the amount of protrusion of the cutter protruding downward from the bottom surface of the base.

A black line guide for displaying the cutting position of the cutter is provided at the front end portion of the upper surface of the base, and the user performs a cutting operation while confirming the cutting position of the cutter with the black line guide. Chips generated during cutting work are carried by the air flow and inertia generated by the rotation of the cutter that cuts the workpiece, and are discharged from the rear of the cutter case through the inside of the cutter case that covers the upper half of the cutter. The However, some chips still have room for improvement in that they jump out to the front of the cutter case and accumulate on the upper surface of the black line guide disposed on the upper surface of the front end of the base, making it difficult to see the black line guide.
Japanese Utility Model Publication No. 55-42584

  The present invention has been made in view of such points, and provides a technique effective in preventing chips generated during a cutting operation of a workpiece by a cutter from accumulating in a front region in the cutting direction. Objective.

In order to achieve the above object, the invention described in each claim is configured.
The grooving tool according to the first aspect of the present invention includes a cutter, a motor, a main body housing, a base, an opening, and a display unit. The cutter forms a groove in the workpiece by a cutting operation using a rotational motion. The motor rotates the cutter. The main body housing covers the upper region of the cutter and accommodates the motor. The base is disposed below the main body housing and can be placed on the workpiece. The base is formed with an opening that allows the lower edge of the cutter to project a predetermined amount downward from the bottom surface of the base. The display unit is provided at a front position in the cutting direction of the cutter on the upper surface of the base, and when the groove is formed in the workpiece by moving the base forward with the base placed on the workpiece, the cutting position of the cutter is determined. indicate.
According to the grooving tool of the present invention, while the base is placed on the workpiece, the position of the cutter is confirmed by the display unit and the main body housing is moved downward while being moved, thereby being rotated by a motor. The workpiece can be cut with a cutter to form grooves. The “cutter” in the present invention typically has a configuration in which a plurality of blades are arranged at predetermined intervals in the circumferential direction on the outer periphery of a rotating body that performs rotational movement. In addition, the “main body housing” in the present invention typically includes a motor housing that houses a motor, a cutter case that covers a cutter, a connecting portion that connects the motor housing and the cutter case to each other, and the like. They are formed integrally or integrally.

Further, the grooving tool of the present invention connects the main body housing to the base so as to be tiltable in the vertical direction, and the lower edge of the cutter protrudes from the lower surface of the base through the opening by the vertical tilting operation of the main body housing. It has a cutting depth adjustment mechanism that adjusts the cutting depth by the cutter by changing the amount of protrusion. The incision depth adjusting mechanism is disposed on the rear side of the base, and includes an incision depth adjusting rotation shaft and an incision depth adjusting rotation shaft that form a tilting fulcrum of the body housing with respect to the base in the vertical direction. The incision depth adjusting guide having an arcuate guide hole at the center and the inclining position of the main body housing with respect to the base are defined by engaging with the incision depth adjusting guide at an arbitrary position in the guide hole. A locking member that allows tilting of the main body housing by releasing the stop, and the cutting depth adjusting guide is arranged between the front of the cutter and the rear of the display unit. . In the present invention, the “rotation shaft for adjusting the depth of cut” is set in the motor housing as a component of the main body housing, in the mode set in the cutter case, or in the connecting portion between the motor housing and the cutter case. Any of the embodiments is preferably included. In addition, as a mode of “locking” in the present invention, typically, a mode in which the locking member is constituted by a screw member and is fixed to the cutting depth adjustment guide by a tightening action of the screw member corresponds to this. However, it suitably includes a fixing method other than a screw member.
As described above, when the cutting depth adjustment guide is arranged between the front of the cutter and the rear of the display unit, the tilting operation in the vertical direction of the main body housing including the cutter and the motor is smoothly guided. Although effective above, on the other hand, it becomes difficult to remove the chips deposited on the upper surface of the display section because the depth adjustment guide becomes a wall.

  In this invention, it has the ventilation mechanism which blows off the cooling air in the main body housing used for cooling of a motor to a display part as a characteristic structure. The blower mechanism is provided in the main body housing, blows the cooling air in the main body housing through the side of the cut depth adjustment guide to the front of the main body housing, and is provided in the base and blows out from the blower path. The cooling air flow is configured to have a wind direction changing portion that changes the flow direction of the cooling air and guides it to the display portion in front of the cutting depth adjustment guide. In addition, as an aspect of “through the side” in the present invention, an aspect in which the air passage extends through the side of the cut depth adjustment guide, and cooling air blown out from the air passage adjusts the cut depth. Any of a mode in which the cooling air is blown out in the vicinity of the side of the cutting depth adjustment guide is suitably included. In the present invention, the “air passage” extends through the side of the cutter case (accommodating space for accommodating the cutter) and the outer side of the cutter case (outside of the accommodating space for accommodating the cutter). Any of the embodiments is preferably included. According to the present invention, the cooling air discharged from the main body housing is rationally supplied to the display portion in front of the cutting depth adjustment guide while avoiding the cutting depth adjustment guide via the air passage and the wind direction changing portion. It becomes possible to guide. Thereby, it is possible to prevent chips from accumulating on the display unit, to facilitate the confirmation of the cutting position of the cutter by the user, and to improve workability.

(Invention of Claim 2)
According to the second aspect of the present invention, the air passage in the grooving tool according to the first aspect has an air blowing area having a predetermined width in the vertical direction, and the main body housing projects from the lower surface of the base of the lower edge of the cutter. The blowing direction is set so as to guide the cooling air flowing through the upper layer in the blowing area to the wind direction changing portion when placed at the maximum cutting depth position where the amount is maximized. In addition, when the main housing is placed at the minimum depth of cut that minimizes the amount of protrusion from the lower surface of the base of the lower edge of the cutter, the cooling air flowing through the lower layer in the air blowing area is directed to the wind direction changing portion. It is set as the structure which has the 1st wind direction guide which guides it diagonally below so that it may blow out.
In the grooving tool provided with the cutter cutting depth adjusting mechanism, when the cutting depth of the cutter is adjusted, the direction of the blowout opening of the air passage provided in the main body housing is changed in accordance with the adjustment. That is, the blowing direction of the cooling air changes. In the present invention, when the main body housing is placed at the maximum cutting depth position, the blowing direction of the air passage is set so as to guide the upper cooling air in the air blowing area to the wind direction changing portion, while the main body housing Is provided with a first wind direction guide that guides obliquely downward so that the cooling air in the lower layer in the blower region flows toward the wind direction changing portion when placed at the minimum cut depth position. For this reason, even if the main unit housing is placed at either the maximum cutting depth position or the minimum cutting depth position, any cut between the maximum cutting depth position and the minimum cutting depth position is also possible. Even if it is placed at the insertion depth position, it is possible to efficiently guide the cooling air blown from the air blowing path to the wind direction changing portion on the base. Thereby, it is possible to prevent chips from accumulating on the display unit regardless of the change in the cutting depth position of the cutter.

(Invention of Claim 3)
According to the third aspect of the present invention, in the air passage in the grooving tool according to the first or second aspect, all or a part of the cooling air that flows linearly forward in the air passage is changed in the air direction. It is set as the structure which has the 2nd wind direction guide which guides to the diagonal side so that it may flow toward a part. According to such a configuration, it becomes possible to efficiently guide the cooling air blown out from the air blowing path to the wind direction changing portion, thereby increasing the amount of cooling air guided onto the display unit via the wind direction changing portion. Can do.

(Invention of Claim 4)
A grooving tool according to a fourth aspect of the present invention includes a cutter, a motor, a main body housing, a base, an opening, and a display unit. The cutter forms a groove in the workpiece by a cutting operation using a rotational motion. The motor rotates the cutter. The main body housing covers the upper region of the cutter and accommodates the motor. The base is disposed below the main body housing and can be placed on the workpiece. The base is formed with an opening that allows a lower edge portion of the cutter disposed above the base to project a predetermined amount downward from the lower surface of the base. The display unit is provided at a front position in the cutting direction of the cutter on the upper surface of the base, and when the groove is formed in the workpiece by moving the base forward with the base placed on the workpiece, the cutting position of the cutter is determined. indicate.
According to the grooving tool of the present invention, while the base is placed on the workpiece, the position of the cutter is confirmed by the display unit and the main body housing is moved downward while being moved, thereby being rotated by a motor. The workpiece can be cut with a cutter to form grooves. The “cutter” in the present invention typically has a configuration in which a plurality of blades are arranged at predetermined intervals in the circumferential direction on the outer periphery of a rotating body that performs rotational movement. In addition, the “main body housing” in the present invention typically includes a motor housing that houses a motor, a cutter case that covers a cutter, a connecting portion that connects the motor housing and the cutter case to each other, and the like. They are formed integrally or integrally.

The grooving tool of the present invention is connected to the base housing so as to be tiltable in the vertical direction with respect to the base, and the protrusion amount of the lower edge of the cutter protruding from the lower surface of the base through the opening by the vertical tilting action of the main body housing And a cutting depth adjusting mechanism for adjusting the cutting depth of the cutter. The incision depth adjusting mechanism is disposed on the rear side of the base, and the incision depth adjusting rotation shaft and the incision depth adjusting rotation shaft that form a tilting fulcrum of the body housing with respect to the base in the vertical direction. A depth-of-cut adjustment guide having an arc-shaped guide hole centered at the center, and a tilt position of the main body housing with respect to the base by locking to the depth-of-cut depth adjustment guide at an arbitrary position in the guide hole, And a locking member that allows tilting of the main body housing by releasing the locking.
The grooving tool of the present invention has an air passage that blows cooling air in the main body housing used for cooling the motor to the front of the main body housing. The air passage has a predetermined air blowing area in the vertical direction, and when the main body housing is placed at the maximum cutting depth position that maximizes the amount of protrusion from the lower surface of the base of the lower edge of the cutter, When the blowing direction is set so that the cooling air flowing through the upper layer faces the display section, and the main body housing is placed at the minimum cutting depth position that minimizes the amount of protrusion from the lower surface of the base at the lower edge of the cutter In addition, the airflow guide is configured to have a wind direction guide that is guided obliquely downward so that the cooling air flowing in the lower layer in the air blowing region is blown out toward the display unit.

  In the grooving tool provided with the cutter cutting depth adjusting mechanism, when the cutting depth of the cutter is adjusted, the direction of the blowout opening of the air passage provided in the main body housing is changed in accordance with the adjustment. That is, the blowing direction of the cooling air changes. In the present invention, when the main body housing is placed at the maximum depth of cut position, the blowing direction of the air passage is set so that the upper cooling air in the air blowing area faces the display unit, while the main body housing is at the minimum. When placed at the cutting depth position, the lower air cooling air in the blower region has a first wind direction guide that is guided obliquely downward so as to blow out toward the display unit. For this reason, even if the main unit housing is placed at either the maximum cutting depth position or the minimum cutting depth position, any cut between the maximum cutting depth position and the minimum cutting depth position is also possible. Even if it is placed at the insertion depth position, it is possible to efficiently guide the cooling air blown from the air blowing path to the display unit on the base. Thereby, it is possible to prevent chips from accumulating on the display unit regardless of the change in the cutting depth position of the cutter.

  ADVANTAGE OF THE INVENTION According to this invention, in the grooving tool, the technique effective in preventing that the chip | tip generated at the time of the cutting operation of the workpiece by a cutter accumulates in the front area | region of a cutting direction was provided.

Hereinafter, a grooving tool according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing the overall configuration of a hand-held grooving tool according to the present embodiment, and FIG. 2 shows the overall configuration of the grooving tool as a cross-sectional view and cooling after cooling the motor. Wind flow is indicated by a thick line. FIG. 3 is a view taken in the direction of the arrow A in FIG. 4 is a view taken in the direction of arrow B in FIG. FIG. 5 is a view taken in the direction of arrow B in FIG. 1 and shows a state in which the case cover is removed. FIGS. 6 and 7 are views as seen from the direction of arrow B in FIG. 1, showing the cutting depth adjustment mode of the cutter in a state where the inclined cutting mechanism is omitted, and the flow of cooling air after motor cooling is indicated by a thick line. Indicated. FIG. 6 shows the time of minimum cutting, and FIG. 7 shows the time of maximum cutting. 8 and 9 are front views showing the entire configuration of the inclined cutting mechanism as viewed from the front of the grooving tool, FIG. 8 shows a right angle, and FIG. 9 shows a maximum inclination. FIG. 10 is an enlarged view showing the configuration of the blower mechanism, and FIG. 11 is a cross-sectional view showing the blower passage. 12 is a cross-sectional view taken along the line CC of FIG.
As shown in FIGS. 1 to 5, the grooving tool 101 according to the present embodiment is generally a substantially rectangular base 103 that can be placed on a workpiece W (see FIGS. 3 to 5). And a tool main body 105 connected to the base 103.

  The tool body 105 includes a cutter case 107 that covers substantially the upper half (upper region) of the cutter 121 that is rotated in a vertical plane, a motor housing 109 that houses a drive motor 123 for rotationally driving the cutter 121, and use. When a person operates the grooving tool 101, the handgrip 111 is mainly configured to be held by one hand. Further, in front of the tool body 105 (on the right side in FIG. 1), an auxiliary grip 113 that the user holds with the other hand is fixedly disposed on the base 103. That is, the grooving tool 101 according to the present embodiment is configured such that the user holds the hand grip 111 with one hand and holds the auxiliary grip 113 with the other hand. The tool body 105 corresponds to the “body housing” in the present invention.

  The lower edge portion of the cutter 121 protrudes downward from the lower surface of the base 103 through a substantially rectangular opening 103 a formed in the base 103. Although not shown in detail for the configuration of the cutter 121, the cutter 121 has a rotating body and a plurality of blades arranged at predetermined intervals in the circumferential direction on the outer periphery of the rotating body. For convenience of explanation, when the tip of the base 103 is placed and moved on the workpiece W to form a groove in the workpiece W, the tip side is referred to as the front, and the opposite side is referred to as the rear. The horizontal direction intersecting with is called right and left. The hand grip 111 is integrally provided above the motor housing 109 and includes a trigger 109a that energizes and drives the drive motor 123 by a user's pulling operation.

  The drive motor 123 is disposed on the side of the cutter 121, and the rotation axis of the rotation shaft 123 a is set parallel to the rotation axis of the cutter 121. The rotational output of the drive motor 123 is transmitted to the cutter 121 at a reduced speed via a gear-type power transmission mechanism (not shown) disposed in the cutter case 107. The motor housing 109 that houses the drive motor 123 is disposed on the side of the cutter case 107 and joined to the cutter case 107. That is, the motor housing 109 and the cutter case 107 are integrated. The cutter case 107 has an open side surface opposite to the motor housing 109 for attaching and detaching the cutter 121. The open portion is closed by a detachable case cover 108.

  In the grooving tool 101 configured as described above, an operator grasps the hand grip 111 and the auxiliary grip 113 of the grooving tool 101 and energizes the drive motor 123 by pulling the trigger 109a to drive the cutter 121. , The front end portion of the base 103 is placed on the workpiece W and moved forward while applying a load downward, so that the workpiece W is cut by the cutter 121 to form a groove. Can be formed. A black line guide 127 for displaying the cutting position of the cutter 121 is provided on the upper surface of the front end of the base 103. Therefore, the user performs the cutting work while confirming the cutting position of the cutter 121 with the line of sight toward the black line guide 127. The black line guide 127 corresponds to the “display unit” in the present invention.

  Next, the cutting depth adjusting mechanism 131 that adjusts the cutting depth of the cutter 121 will be described with reference mainly to FIGS. The cutting depth adjusting mechanism 131 includes a first rotating shaft 133 for adjusting the cutting depth that supports the tool main body 105 so as to be tiltable in the vertical direction, and a tool that tilts with the first rotating shaft 133 as a fulcrum. A depth guide 135 that guides the movement of the main body 105 and a lock screw 137 as a lock member that fixes (locks) the tool main body 105 to the depth guide 135 and determines the tilting position are mainly configured. The depth guide 135 corresponds to the “cut depth adjusting guide” in the present invention, and the lock screw 137 corresponds to the “locking member” in the present invention.

  The first rotating shaft 133 is disposed on the rear side of the base 103, a rear angular plate 155 that is one of components of an inclined cutting mechanism 151 described later, and a cutter case 107 that is a component of the tool main body 105. The tool main body part 105 can be tilted in the vertical direction by connecting the rear end part to the rear end part so as to be relatively rotatable. The depth guide 135 is disposed between the front of the cutter 121 and the rear of the black line guide 127. On the other hand, an extension portion 107 a extending forward is formed in the front region of the cutter case 107. The side surface of the extending portion 107a and the side surface of the depth guide 135 are configured to face each other. Further, the depth guide 135 is formed with an arcuate guide hole 135 a extending in the vertical direction with the first rotation shaft 133 as the center. The lock screw 137 passes through the guide hole 135a of the depth guide 135 and is screwed into the female screw portion 107b provided in the extension portion 107a of the cutter case 107 from the side. The cutter case 107 is fixed to the depth guide 135 by tightening the lock screw 137, and the fixing is released by loosening the tightening.

  Therefore, in the state in which the fixing with the lock screw 137 is released, the tool body 105 is tilted around the first rotation shaft 133 so that the protrusion amount of the cutter 121 from the bottom surface of the base 103 is reduced to the minimum depth of cut shown in FIG. 7 and the maximum cutting depth position shown in FIG. 7 can be arbitrarily adjusted, and after the adjustment, it can be fixed to an arbitrary protruding amount adjusted by tightening the lock screw 137. Note that the depth of cut of the cutter 121 can be adjusted using a scale provided on the depth guide 135 and a pointer provided on the cutter case 107.

  Next, the inclined cutting mechanism 151 that forms an inclined groove by performing a cutting operation in a state where the cutter 121 is inclined obliquely with respect to the workpiece W will be mainly described with reference to FIGS. Will be described with reference to FIG. The inclined cutting mechanism 151 according to the present embodiment includes front and rear angular guides 153 provided on the front side and rear side of the base 103, and front and rear angular plates 155 provided on the front side and rear side of the tool main body 105. The tool body 105 is adjusted by the second rotation shaft 157 for tilting forward and backward, which constitutes the center of rotation when the tool body 105 is tilted left and right with respect to the base 103 by the user's operation. A lock screw 159 as a front and rear locking member that is fixed to the inclined position by a user's operation is mainly configured.

  The front angular guide 153 as a base side member is erected integrally on the opposite side of the drive motor 123 across the cutter 121 at the front end of the upper surface of the base 103. The front angular plate 155 as the tool main body side member is set at a position close to the depth guide 135 that is a component of the above-described cutting depth adjusting mechanism 131 and is formed integrally with the depth guide 135. Has been. That is, the angular plate 155 is formed so as to extend from the lower side surface of the depth guide 135 to the side opposite to the drive motor 123 with the cutter 121 interposed therebetween, and is opposed to the rear surface of the angular guide 153. Placed in position. Then, the angular plate 155 is connected to the angular guide 153 via the second rotating shaft 157 on the front side so as to be rotatable. The front and rear second rotation shafts 157 have an axial direction that is a cutting direction by the cutter 121, that is, a front and rear direction of the tool main body 105. That is, the tilting direction of the tool body 105 is the left-right direction that intersects the cutting direction of the cutter 121. The rotation center of the front and rear second rotation shafts 157 is set on the center line of the blade width of the cutter 121 (the length of the cutter 121 in the rotation axis direction).

  The front angular plate 155 is formed with an arcuate guide hole 155 a centering on the second rotation shaft 157. The front lock screw 159 is penetrated from the front side of the angular guide 153 to the guide hole 155a of the angular plate 155 through the through hole of the angular guide 153. The angular plate 155 is fixed to the angular guide 153 by tightening the lock screw 159, and the fixation is released by loosening the tightening.

  A rear angular guide 153 as a base side member is integrally provided on the rear upper surface of the base 103. A rear angular plate 155 as a main body side member is connected to an angular guide 153 via a rear second rotation shaft 157 so as to be relatively rotatable. Further, a guide hole (not shown) is formed in the angular guide 153, and a lock screw 159 on the rear side is screwed into the angular plate 155 so as to penetrate the guide hole. By tightening the lock screw 159, the rear angular plate 155 is fixed to the rear angular guide 153, and by loosening the tightening, the fixing is released.

  Therefore, in a state where the fixing by the front and rear lock screws 137 is released, the tilt angle of the tool main body portion 105 with respect to the base 103 is inclined by tilting the tool main body portion 105 in the left-right direction with the front and rear second rotation shafts 157 as fulcrums. That is, the inclination angle of the cutter 121 can be arbitrarily adjusted between the right angle position shown in FIG. 8 and the maximum inclination position shown in FIG. 9, and after the adjustment, the arbitrary angle adjusted by tightening the front and rear lock screws 159 Can be fixed at an inclination angle position. Thereby, it is set as the structure corresponding to the grooving operation | work in the state inclined to the left side seeing from the front of the grooving tool 101, ie, an inclination cutting. The inclination angle of the tool main body 105 can be adjusted by a scale provided on the front angular plate 155 and a pointer provided on the front angular guide 153.

  The right angle position of the tool body 105 is defined by the lower end of the depth guide 135 being in contact with the upper end of a stopper 139 provided on the upper surface of the base 103. The vertical position of the stopper 139 can be adjusted. That is, the right angle position of the tool main body 105 can be adjusted to a normal right angle position by finely adjusting the height position of the stopper 139.

  Further, the above-described extension portion 107 a of the cutter case 107 includes a light accommodating portion 107 c at a position protruding further forward than the front surface of the depth guide 135. As shown in FIGS. 6 and 7, the light accommodating portion 107c has a light accommodating space for accommodating an LED (light emitting diode) light 115 as an illuminating means, and the LED light 115 is accommodated in the light accommodating space. It is fixed. The LED light 115 is configured to irradiate the black line guide 127 and its front region through the opening.

  Further, as shown in FIG. 2, a guard 141 formed in a substantially U shape in a plan view is arranged in the front region on the inner side of the cutter case 107. The guard 141 has a front lower portion connected to one end (rear end) of the above-described second rotating shaft 157 on the front side. The guard 141 has a guide portion 141 a that extends upward in contact with the inner side surface portion of the cutter case 107, and the guide portion 141 a has an arc shape centering on the first rotation shaft 133 described above. A guide hole 141b is formed. A collar 143 movable along the guide hole 141b is fitted in the guide hole 141b. The collar 143 passes through the collar 143 and is fixed by a set screw 145 fixed to the side surface of the cutter case 107. Is retained. A washer 147 is interposed between the head of the set screw 145 and the side surface of the guide portion 141a. Therefore, when the tool body 105 is tilted in the left-right direction with the second rotation shaft 157 as a fulcrum, the guard 141 tilts integrally with the tool body 105, and the tool body 105 is moved in the first time. When tilted in the vertical direction with the moving shaft 133 as a fulcrum, the tool body 105 is guided to tilt.

  Next, the air blowing mechanism 171 that blows cooling air in the motor housing 109 used for cooling the drive motor 123 onto the upper surface of the black line guide 127 and the front area thereof to blow off chips will be described. A cooling fan 161 for allowing cooling air to flow through the motor housing 109 is attached to the rotating shaft 123a of the drive motor 123 so as to rotate integrally with the rotating shaft 123a. A centrifugal fan is used as the cooling fan 161, and a baffle plate 163 is disposed on the rear side of the cooling fan 161. A ventilation hole 165 is provided in the center of the baffle plate 163. When the cooling fan 161 is rotationally driven by the energization drive of the drive motor 123, the cooling air is sucked from the suction port 109b formed at the axial end of the motor housing 109 by the suction force of the cooling fan 161. The sucked cooling air flows to the cutter case 107 through the gap between the rotor and the stator or the gap formed between the stator and the inner wall surface of the motor housing 109, thereby causing the drive motor 123 to flow. Cooling. The cooling air passing through the drive motor 123 is discharged to the cutter case 107 while being guided by the baffle plate 163.

  The blower mechanism 171 according to the present embodiment is formed in the cutter case 107, and the cooling air sent from the motor housing 109 to the cutter case 107 side passes through the side of the depth guide 135 described above to the front of the cutter case 107. And a wind direction guide plate 175 that is provided in the base 103 and that changes the flow direction of the cooling air blown from the air passage 173 and guides it to the black line guide 127. The air blowing mechanism 171 corresponds to the “air blowing mechanism” in the present invention, the air blowing path 173 corresponds to the “air blowing path” in the present invention, and the wind direction guide plate 175 corresponds to the “wind direction changing portion” in the present invention. The cutter case 107 has a cutter housing area 107d for housing the cutter 121, and a generally cylindrical connecting portion 107e corresponding to the cylindrical shape of the motor housing 109 so as to be connected to the cylindrical motor housing 109. An air passage 173 is formed in the connecting portion 107e.

  The air passage 173 is formed in a substantially rectangular cross section by a side wall 173a protruding forward, an upper and lower guide wall 173b, and a cover plate 173c facing the side wall 173a on the front side of the connecting portion 107e (see FIG. 12). At the same time, the cutter case 107 extends forward by a predetermined length through the side of the depth guide 135 disposed in front of the cutter housing area 107d (see FIG. 2). On the base side (rear side), the air passage 173 communicates with the internal space of the motor housing 109 through the cooling wind introduction wind window 173d, and the extended side end (front end) serves as a cooling air outlet. It is open. That is, after the cooling air in the motor housing 109 passes through the wind window 173d and is discharged in the direction of the rotation axis of the drive motor 123 into the air passage 173, the direction of the air is changed to the radial direction of the cutter 121 in the air passage 173. And is blown out toward the wind direction guide plate 175 located obliquely below the front of the case cover 108 from the blowout opening. As described above, the air passage 173 according to the present embodiment is provided outside the cutter housing region 107d, extends substantially forward through the outside of the cutter case 107, and has a blowout port with a depth guide 135. The extension length is set so as to open in the vicinity of the side surface.

  The air passage 173 is disposed below the above-described extending portion 107a formed in the front region of the cutter case 107 so as to be fixed to the depth guide 135 via the lock screw 137 (see FIGS. 6 and 7). The cover plate 173c also serves as a wiring cover that covers the wiring 115a of the LED light 115 described above, and is fixed to the cutter case 107 by fixing means such as screws (see FIG. 5).

  The wind direction guide plate 175 is configured by a rib erected at a predetermined height upward at a front side of the depth guide 135 on the front upper surface of the base 103 and at a rear position of the ink guide 127 in front of the air passage 173. (See FIG. 2). The guide surface 175a facing the outlet of the air passage 173 is a gently curved surface so as to change the flow direction of the cooling air blown linearly forward from the air passage 173 and guide it to the black line guide 127 in front of the depth guide 135. Is formed by. In addition, about the protrusion height of the wind direction guide plate 175, it should just have the height which can change the flow direction of a cooling wind.

  The air flow path 173 has an air blowing area having a predetermined width in the vertical direction, and when the tool body 105 is tilted to the maximum cutting depth position, the upper cooling air of the cooling air flowing through the air blowing area is in the wind direction. The blowing direction is set so as to face the guide plate 175. This state is shown in FIG. The air passage 173 is guided so that the cooling air in the lower layer of the cooling air flowing through the air blowing area is blown out toward the air direction guide plate 175 when the tool body 105 is tilted to the minimum cutting depth position. A wind guide plate 177 is provided. The wind guide plate 177 corresponds to the “first wind direction guide” in the present invention. The wind guide plate 177 is a substantially central portion in the vertical direction in the air blowing area of the air passage 173 and is provided in the vicinity of the blowout port, and has a guide surface that is inclined downward. The cooling air flowing on the lower layer side is guided to blow toward the wind direction guide plate 175 (this state is shown in FIGS. 6 and 10). In the figure, the guide surface of the wind guide plate 177 is formed as a flat surface, but may be formed as a curved surface.

  In addition, as shown in FIG. 12, the air passage 173 has a structure in which the upper layer side has a width larger than the width of the lower layer side in the air blowing area, and the side wall 173a has its outlet port as shown in FIG. In addition, an inclination guiding portion 173e that is inclined so as to guide the cooling air toward the black line guide 127 is formed. For this reason, the cooling air blown from the upper layer side can be more intensively guided to the wind direction guide plate 175. Thereby, chips can be efficiently removed. The inclination guiding portion 173e corresponds to the “second wind direction guide” in the present invention.

  The grooving tool 101 according to the present embodiment is configured as described above. Therefore, when making a right angle cut to form a groove perpendicular to the workpiece W, the user supports the front and rear second rotary shafts 157 with the front and rear lock screws 159 in the inclined cut mechanism 151 loosened. Thus, the tool body 105 is tilted to a right angle position. As a result, the depth guide 135 and the front and rear angular plates 155 are tilted together with the tool main body portion 105, and the lower end portion of the depth guide 135 abuts against the stopper 139. As a result, the tool body 105 is moved to a right angle position where the rotation surface of the cutter 121 forms a right angle (0 degree) with respect to the upper surface of the base 103. Thereafter, the front and rear locking screws 159 are tightened to fix the front and rear angular plates 155 to the front and rear angular guides 153. Thus, as shown in FIG. 8, it becomes possible to form a groove perpendicular to the upper surface of the workpiece W by the cutter 121. In this case, it is possible to set the normal vertical position by finely adjusting the vertical position of the stopper 139.

  On the other hand, when making an inclined cut to form a groove perpendicular to the workpiece W, the user loosens the front and rear lock screws 159 and uses the front and rear second rotation shafts 157 as a fulcrum to provide the tool body 105. Is tilted to an arbitrary tilt position, and the front and rear locking screws 159 are tightened to fix the front and rear angular plates 155 to the front and rear angular guides 153. Thus, as shown in FIG. 9, the cutter 121 can form a V-shaped inclined groove on the upper surface of the workpiece W.

  In addition, about the cutting depth of the cutter 121 at the time of forming a groove | channel in the to-be-processed material W, the lock screw 137 in the cutting depth adjustment mechanism 131 is loosened about both right angle cutting and inclined cutting, and it is 1st in that state. By tilting the tool body 105 in the vertical direction with the pivot shaft 133 as a fulcrum, it can be arbitrarily set between the minimum cutting depth position shown in FIG. 6 and the maximum cutting depth position shown in FIG. Can be adjusted.

  During the cutting operation by the cutter 121, cooling air is taken into the motor housing 109 by the rotation drive of the cooling fan 161, and the drive motor 123 is cooled. Then, the cooling air after cooling the motor passes through the wind window 173d and is discharged to the air blowing path 173. The cooling air discharged to the air blowing path 173 flows linearly toward the front of the air blowing path 173 and blows off obliquely downward from the blowout opening. A part of the cooling air blown out from the blowout port of the air passage 173 hits the guide surface 175a of the airflow direction guide plate 175 on the base 103 to change its flow direction, and then the front of the depth guide 135 It flows toward the ink line guide 127. On the other hand, the cooling air passing above the wind direction guide plate 175 flows to the front area of the black line guide 127, that is, the upper surface of the workpiece.

  On the other hand, most of the chips generated by the cutting operation are conveyed to the rear through the inside of the cutter case 107 by the rotation of the cutter 121 and discharged from the rear of the cutter case 107 to the outside. Further, some of the chips flow from the opening 103a of the base 103 to the black line guide 127 on the front upper surface of the base 103 or to the upper surface of the workpiece W in front of the black line guide 127. This chip is described above. It is blown away by the cooling air of the flow, that is, the cooling air blown out from the air passage 173. Thereby, it is possible to prevent chips from accumulating on the upper surface of the black line guide 127 and the front area thereof, and when the user performs a groove cutting operation along the black line drawn on the workpiece, the black line alignment by the black line guide 127 is performed. Can be done easily.

  By the way, when the depth guide 135 for adjusting the cutting depth of the cutter 121 is arranged behind the black line guide 127, the depth guide 135 becomes a wall to remove chips accumulated on the upper surface of the black line guide 127. It will be difficult. In view of this, in the present embodiment, the cooling air after cooling the motor is supplied to the outside of the cutter housing area 107d of the cutter case 107, that is, through the air passage 173 provided in the connecting portion 107e with the motor housing 109. The cooling air blown out straight from the side of the guide 135 to the upper surface of the base 103 in front of the cutter case 107 and then blown out from the air passage 173 is sent to the ink guide 127 by a wind direction guide plate 175 provided on the base 103. It is the structure which leads to. As a result, it is possible to rationally remove chips on the black line guide 127 that is disposed in proximity to the front of the depth guide 135 while avoiding the depth guide 135.

  Further, when the cutting depth of the cutter 121 is adjusted, the direction of the outlet of the air passage 173 changes. In order to cope with this, in the present embodiment, when the tool main body 105 is adjusted to the maximum cutting depth position, as shown in FIG. 7, the outlet of the air passage 173 is set to face obliquely downward. Yes. That is, the blowing direction is set so that the cooling air flowing in the upper layer of the air blowing path 173 blows out toward the wind direction guide plate 175. As a result, the cooling air flowing through the upper layer is blown to the black line guide 127 through the wind direction guide plate 175. At this time, the cooling air flowing in the lower layer is blown to the upper surface of the base 103 behind the airflow direction guide plate 175, and then flows along the upper surface of the base 103 toward the airflow direction guide plate 175, and is drawn by the airflow direction guide plate 175. Guided to guide 127. That is, when the tool body 105 is adjusted to the maximum cutting depth position, most of the cooling air blown from the air passage 173 is blown to the upper surface of the black line guide 127 and its front region, and the upper surface of the black line guide 127 and Chips in the front area can be removed. Further, as shown in FIG. 11, the cooling air flowing through the upper layer of the air passage 173 is guided by an inclined guiding portion 173e provided at the tip of the side wall 173a so that the blowing direction is directed obliquely toward the wind direction guide plate 175. Yes. For this reason, the cooling air blown out from the air passage 173 can be more intensively guided to the wind direction guide plate 175 side.

  On the other hand, when the tool main body 105 is adjusted to the minimum cutting depth position, the blowout port of the air passage 173 faces upward as compared with the above-described maximum cutting depth position, and blows toward the wind direction guide plate 175. The cooling air generated will be reduced. In view of this, in the present embodiment, a wind guide plate 177 is provided in the vicinity of the outlet in the air passage 173, and the cooling air flowing through the lower layer of the air passage 173 by the wind guide plate 177 is obliquely downward, that is, the wind direction guide. The structure leads to the plate 175. As a result, the cooling air can be rationally guided to the black line guide 127 via the wind direction guide plate 175. That is, according to the present embodiment, the cooling air can be rationally guided to the black line guide 127 even when the tool body 105 is adjusted to the minimum cutting depth position.

  In the state where the tool body 105 is placed at an arbitrary position between the minimum cut depth position and the maximum cut depth position, the air volume blown to the wind direction guide plate 175 is blown out from the air passage 173 to the horizontal line. It increases more than the air volume at the minimum cutting depth where the inclination angle of the mouth becomes the smallest. That is, according to the present embodiment, the maximum depth of cut position and the minimum depth of cut are determined regardless of whether the tool body 105 is placed at the maximum depth of cut position or the minimum depth of cut position. Even if it is placed at an arbitrary cutting depth position between the depth position and the cooling position, the cooling air blown out from the air blowing path 173 can be efficiently guided to the wind direction guide plate 175 on the base 103. Accordingly, it is possible to prevent chips from being accumulated on the black line guide 127 regardless of the change in the cutting depth position of the cutter 121.

  In the above-described embodiment, the cooling air blown out from the air passage 173 is guided to the ink line guide 127 via the wind direction guide plate 175 on the base 103. However, the ink line guide 127 is disposed in front of the air passage 173. In other words, the air passage 173 may be disposed behind the black line guide 127. In such a configuration, it is possible to omit the wind direction guide plate 175 on the base 103. That is, it is possible to configure a blower mechanism having only the blower passage 173 described in the embodiment.

In view of the gist of the present invention, the following modes can be configured.
(Aspect 1)
"A grooving tool according to any one of claims 1 to 3,
The wind direction changing portion is disposed on the base, on a side of the cutting depth adjustment guide and behind the display portion. "

(Aspect 2)
“A grooving tool according to aspect 1,
The airflow direction changing unit is configured to change the flow direction of the cooling air so that the cooling air blown linearly forward from the airflow channel flows toward the display unit. A grooving tool characterized in that a portion facing the groove is formed by an inclined guide surface. "

It is a top view which shows the whole structure of the handheld grooving tool which concerns on this Embodiment. It is a plane sectional view showing the whole grooving tool composition. FIG. 2 is a view taken in the direction of arrow A in FIG. 1 and shows a state in which the motor housing is cut. It is a B arrow line view of FIG. FIG. 2 is a view as seen in the direction of arrow B in FIG. 1 and shows a state where a case cover is removed. FIG. 2 is a view as viewed in the direction of arrow B in FIG. 1, showing a state in which the inclined cutting mechanism is omitted and the cutter is adjusted to the minimum cutting depth position. It is a B arrow line view of FIG. 1, and while the inclination cutting mechanism is abbreviate | omitted, the state by which the cutter was adjusted to the maximum cutting depth position is shown. It is a front view which shows the whole structure of the inclination cutting mechanism seen from the front of the grooving tool, and the state by which the cutter was placed in the right angle position is shown. It is a front view which shows the whole structure of the inclination cutting mechanism seen from the front of the grooving tool, and the state by which the cutter was put in the inclination position is shown. It is an enlarged view which shows the structure of a ventilation mechanism. It is a plane sectional view showing an air passage. It is CC sectional view taken on the line of FIG.

Explanation of symbols

101 Grooving tool 103 Base 103a Opening 105 Tool body (main body housing)
107 Cutter case 107a Extension part 107b Female thread part 107c Light accommodation part 107d Cutter accommodation area 107e Connection part 108 Case cover 109 Motor housing 109a Trigger 109b Suction port 111 Hand grip 113 Auxiliary grip 115 LED light 115a Wiring 121 Cutter 123 Drive motor ( motor)
123a Rotating shaft 127 Black line guide (display unit)
131 Depth of Depth Adjustment Mechanism 133 First Rotating Shaft 135 Depth Guide (Incision Depth Adjustment Guide)
135a Guide hole 137 Lock screw (locking member)
139 Stopper 141 Guard 141a Guide portion 141b Guide hole 143 Collar 145 Set screw 147 Washer 151 Inclined cutting mechanism 153 Angular guide 155 Angular plate 155a Guide hole 157 Second rotating shaft 159 Lock screw 161 Cooling fan 163 Baffle plate 165 Ventilation hole 171 Air blow mechanism 173 Air passage 173a Side wall 173b Upper and lower guide walls 173c Cover plate 173d Wind window 173e Inclination guide portion (second wind direction guide)
175 Wind direction guide plate (wind direction changing part)
175a Guide surface 177 Wind guide plate (first wind direction guide)

Claims (4)

A cutter that forms a groove in the workpiece by a cutting operation by rotational movement;
A motor for rotationally driving the cutter;
A main body housing that covers the upper region of the cutter and accommodates the motor;
A base disposed below the main body housing and mountable on a workpiece;
An opening formed on the base and allowing a lower edge of the cutter to protrude downward from the lower surface of the base by a predetermined amount;
When the groove is formed in the workpiece by moving the base forward while the base is placed on the workpiece, the cutter is cut on the upper surface of the base. A display for displaying the position;
The main body housing is connected to the base so as to be tiltable in the vertical direction, and the protrusion amount of the lower edge of the cutter protruding from the bottom surface of the base through the opening is changed by the vertical tilting operation of the main body housing. And a cutting depth adjusting mechanism for adjusting the cutting depth of the cutter, thereby,
The cutting depth adjusting mechanism is
A turning shaft for adjusting a depth of cut, which is disposed on the rear side of the base and forms a tilting fulcrum of the main body housing with respect to the base;
A notch depth adjusting guide having an arcuate guide hole centered on the notch depth adjusting rotation shaft;
The tilt position of the main body housing relative to the base is defined by being locked to the notch depth adjustment guide at an arbitrary position in the guide hole, and tilting of the main body housing is permitted by releasing the lock And a locking member
The cutting depth adjustment guide is a grooving tool arranged between the front of the cutter and the rear of the display unit in the base front part,
A blowing mechanism for blowing cooling air in the main body housing used for cooling the motor to the display unit;
The blower mechanism is provided in the main body housing, and a blower path that blows cooling air in the main body housing to the front of the main body housing through a side of the cut depth adjusting guide;
A wind direction changing portion that is provided on the base and that changes the flow direction of the cooling air that is blown from the air passage and that guides the cooling air to the display portion in front of the cutting depth adjustment guide. Grooving tool characterized by The grooving tool according to claim 1,
The air passage has an air blowing area having a predetermined width in the vertical direction, and the main body housing is placed at a maximum cutting depth position at which the amount of protrusion of the cutter lower edge from the bottom surface of the base is maximized. The blowing direction is set so as to guide the cooling air flowing through the upper layer in the blowing area to the wind direction changing portion, and the main body housing minimizes the protrusion amount of the lower edge of the cutter from the lower surface of the base. And a first wind direction guide for guiding the cooling air flowing in the lower layer in the air blowing area obliquely downward so as to blow out toward the wind direction changing portion when placed at the minimum cutting depth position. Grooving tool to do. A grooving tool according to claim 1 or 2,
The air passage has a second air direction guide that guides the slant side so that all or a part of the cooling air that flows linearly forward in the air passage flows toward the air direction changing portion. A featured grooving tool. A cutter that forms a groove in the workpiece by a cutting operation by rotational movement;
A motor for rotationally driving the cutter;
A main body housing that covers the upper region of the cutter and accommodates the motor;
A base disposed below the main body housing and mountable on a workpiece;
An opening formed on the base and allowing a lower edge of the cutter to protrude downward from the lower surface of the base by a predetermined amount;
When the groove is formed in the workpiece by moving the base forward while the base is placed on the workpiece, the cutter is cut on the upper surface of the base. A display for displaying the position;
The main body housing is connected to the base so as to be tiltable in the vertical direction, and the protrusion amount of the lower edge of the cutter protruding from the bottom surface of the base through the opening is changed by the vertical tilting operation of the main body housing. And a cutting depth adjusting mechanism for adjusting the cutting depth of the cutter, thereby,
The cutting depth adjusting mechanism is
A turning shaft for adjusting a depth of cut, which is disposed on the rear side of the base and forms a tilting fulcrum of the main body housing with respect to the base;
A notch depth adjusting guide having an arcuate guide hole centered on the notch depth adjusting rotation shaft;
The tilt position of the main body housing relative to the base is defined by being locked to the notch depth adjustment guide at an arbitrary position in the guide hole, and tilting of the main body housing is permitted by releasing the lock A grooving tool having a locking member,
An air passage that blows cooling air in the main body housing used for cooling the motor to the front of the main body housing;
The air passage has an air blowing area having a predetermined width in the vertical direction, and the main body housing is placed at a maximum cutting depth position at which the amount of protrusion of the cutter lower edge from the bottom surface of the base is maximized. The blowing direction is set so that the cooling air flowing through the upper layer in the blowing area is directed to the display unit, and the main body housing is a minimum cut-off that minimizes the protrusion amount of the lower edge of the cutter from the lower surface of the base. A grooving tool, comprising: a wind direction guide that guides obliquely downward so that cooling air flowing in a lower layer in the blower region blows toward the display unit when placed at the insertion depth position.

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