JP6529169B2 - Work tools - Google Patents

Description

  The present invention relates to a working tool that drives a tip tool to perform a predetermined processing operation on a workpiece.

  European Patent No. 1737616 discloses a hand-held working tool that transmits the driving force of a drive motor to a spindle to drive a tip tool. In the work tool, the tip tool is held by a clamp shaft that passes through the spindle. The clamp shaft is configured to be movable between a holding position for holding the tip tool and an open position for releasing the tip tool, and a locking mechanism disposed in the spindle when the clamp shaft is in the holding position. It is configured to engage. The locking mechanism has a clamp member that engages with the clamp shaft in the holding position, and a collar member that holds the clamp member. The clamp member and the collar member have a sliding contact area in sliding contact with each other, and the sliding contact area has an inclined element which is inclined with respect to the spindle rotational axis direction.

European Patent No. 1737616

In the work tool, the clamp member is slid from the upper side to the lower side of the inclination element to engage with the clamp shaft, and the clamp shaft holds the tip tool, whereby a smooth processing operation can be performed. .
On the other hand, since it is necessary to move the clamp member in the sliding contact area having the inclined element, it is necessary to set a relatively long predetermined length to the inclined element, and a further device is taken in terms of achieving downsizing of the working tool. It was desired.

  This invention is made in view of the above-mentioned subject, and an object of the present invention is to provide art about a more rational member structure for attaining size reduction of a work tool.

In order to solve the above-described problems, a working tool according to the present invention is a working tool that drives a tip tool to perform a predetermined processing operation on a workpiece, and includes a motor, a spindle, and a tip tool holding member And a lock mechanism.
The spindle is configured to transmit the driving force of the motor to the tip tool. The tip tool holding member is configured to be movable in the spindle rotational axis direction between a holding position for holding the tip tool and an open position for releasing the tip tool. The locking mechanism is configured to engage with the tip tool holding member placed in the holding position to lock the tip tool holding member.
The locking mechanism is further configured to be movable between an engaged position where it engages with the tip tool holding member to lock the tip tool holding member in the holding position, and a release position where the tip tool holding member is disengaged. And a collar member for supporting the clamp member. The clamp member and the collar member have a sliding contact area which is in sliding contact with each other, and the sliding contact area is a first inclination element which is inclined to the spindle rotation axis direction and a second inclination element which is inclined to the spindle rotation axis direction And. The first inclination element and the second inclination element are arranged to be separated from each other in the spindle rotational axis direction. Furthermore, the first tilting element and the second tilting element are configured such that the first tilting element is arranged outside the second tilting element as viewed from the spindle rotation axis.

According to this configuration, the clamp member is configured to be movable between the engaged position and the release position by sliding contact between the clamp member and the collar member. Typically, the inclination of the first inclination element and the second inclination element may have an inclination that the lower end is closer to the spindle rotation axis and the upper end is away from the spindle rotation axis. . When the clamp member moves from the upper side to the lower side with respect to the collar member, the clamp member follows the inclination of the first inclination element and the second inclination element and approaches the spindle rotation axis in the cross direction (inward direction Moved to). This allows the clamp member to be in the engaged position. On the other hand, when the clamp member moves from the lower side to the upper side with respect to the collar member, the clamp member moves away from the spindle rotation axis in the cross direction along the inclination of the first inclination element and the second inclination element It is possible to move in the outward direction). This allows the clamping member to be in the release position.
In other words, for the inclination of the sliding contact area, an upper end and a lower end for securing relative movement between the clamp member and the collar member over a predetermined distance, and a continuous area connecting the upper end and the lower end are set. There is a need. When the sliding contact area is only a single slope, the upper end, the lower end, and the continuous area are set in only one place. On the other hand, when the first and second inclined elements are provided, the upper end, the lower end, and the continuous region can be provided to the first and second inclined elements, respectively, and the cross direction It is possible to bring the lower end of the first inclined element and the upper end of the second inclined element close to each other. Thus, the straight line on the intersecting direction connecting the upper end of the first inclined element and the lower end of the second inclined element is on the intersecting direction connecting the upper end and the lower end in the configuration in which the sliding contact area has only a single inclination. It can be set shorter than the straight line.
That is, in the working tool according to the present embodiment, the locking mechanism can be shortened in the cross direction.

The sliding contact area (the first inclined element or the second inclined element) may be formed by a linear shape, a curved shape, a shape by combination of a plurality of continuous linear shapes, a shape by a combination of a plurality of continuous curved shapes, etc. Can. An arc shape can be mentioned as a typical example of the curve shape.
The fact that the sliding contact area is inclined with respect to the spindle rotational axis direction indicates that the extension line of the sliding contact area intersects the spindle rotational axis at a predetermined angle. The extending line of the sliding contact area indicates the extending line of the linear shape when the sliding contact area has a linear shape, and indicates the normal of the circular arc shape when the sliding contact area has an arc shape. When the sliding contact area is a combination of a plurality of continuous linear shapes or a combination of a plurality of continuous curvilinear shapes, a straight extension line connecting the upper end and the lower end of the sliding contact area is an extension of the sliding contact area. It can be a standing line.
The predetermined angle formed by the first inclining element with respect to the spindle rotational axis direction and the predetermined angle formed by the second inclining element with respect to the spindle rotational axis direction may be the same or different. Also good.

  In the working tool according to the present invention, typically, the spindle is rotationally driven by the motor, and the tip tool is reciprocally driven about a predetermined angular range around the spindle rotational axis centered on the spindle rotational axis. That is, the tip tool is reciprocally driven in an arc shape around the spindle rotation axis. The tip tool preferably includes a plurality of kinds of tools such as a cutting tool for cutting a workpiece and a grinding tool for grinding a workpiece. Therefore, the tip tool carries out the cutting operation and the grinding operation by the reciprocating drive (vibration) of the tip tool within the predetermined angle range. This work tool is also referred to as a vibrating tool.

Further, according to a further aspect of the working tool according to the present invention, the first inclined element includes a first clamp member inclined portion provided on the clamp member and a first collar member inclined portion provided on the collar member. And the second inclined element may have a second clamp member inclined portion provided on the clamp member and a second collar member inclined portion provided on the collar member. In the configuration, the clamp member may have the clamp member inclined connection portion extending in the spindle rotational axis direction while connecting the first clamp member inclined portion and the second clamp member inclined portion, and the collar The member may have a collar member inclined connection portion connecting the first collar member inclined portion and the second collar member inclined portion and extending in the spindle rotational axis direction.
According to the work tool according to the aspect, by forming the clamp member inclined connection portion and the collar member inclined connection portion, the first inclined element and the second inclined element in the direction (cross direction) intersecting with the spindle rotational axis direction. It can be close to the tilting element. Therefore, since the locking mechanism can be shortened in the cross direction, the working tool can be miniaturized.
Note that "extends in the spindle rotational axis direction" typically indicates a case in which it is parallel to the spindle rotational axis direction. Furthermore, even when not parallel to the spindle rotational axis direction, if it has an extension component in the spindle rotational axis direction, it corresponds to the “extend in the spindle rotational axis direction”.

Moreover, according to the further form of the working tool which concerns on this invention, the extension direction of a 1st inclination element and the extension direction of a 2nd inclination element can have an extension component which becomes parallel mutually, respectively.
According to the said structure, a clamp member can be smoothly slid with respect to a collar member. Therefore, it is possible to efficiently move the clamping member between the engagement position and the release position.

Further, according to a further aspect of the working tool according to the present invention, the collar member intersects the spindle rotational axis direction with the inner region having the hole for disposing the clamp member and inserting the tip tool holding member. And an outer region formed outside the inner region in the cross direction which is the direction in which In this configuration, a bearing arrangement area for arranging a bearing that rotatably supports the collar member can be configured in the outer area.
When the collar member is in the engaged position, the tip tool holding member is rotated as the spindle is rotated by the motor, whereby the collar member is rotated. A bearing is arranged to stably support the rotation of the collar member, but according to the work tool according to the present embodiment, the lock mechanism has a compact structure by arranging the bearing in the outer region of the collar member. It is possible to contribute to the downsizing of the working tool.

Moreover, according to the further form of the working tool which concerns on this invention, a clamp member, a collar member, and a bearing can be arrange | positioned along a cross direction, respectively.
According to the configuration, by arranging the components of the lock mechanism along the cross direction, the lock mechanism can be shortened in the spindle rotational axis direction, which can contribute to the downsizing of the working tool. It becomes.

Moreover, according to the further form of the working tool which concerns on this invention, it has a main body housing which comprises at least one part of the shell of a working tool. The lock mechanism includes a collar member, a clamp member, a bearing, a lid member covering at least a part of an inner region of the collar member, and a biasing member disposed between the lid member and the clamp member. An assembly can be configured. In such a configuration, the lock mechanism assembly can be assembled to the body housing.
In the work tool according to the present embodiment, the lock mechanism composed of a plurality of parts can be configured as a lock mechanism assembly and can be assembled to the main body housing, so that it is possible to save labor of assembling work tools. It becomes.

Moreover, according to the further form of the working tool which concerns on this invention, while being formed in hollow shape, a spindle can have one end part and the other end part in the spindle rotation axial direction. Further, the tip tool holding member is provided with an in-spindle region disposed in the spindle, a tip tool fastening region extending from one end of the spindle and configured to be able to be fastened with the tip tool, and the other end of the spindle And an engagement region extending from the portion and configured to be engageable with the clamp member.
In this configuration, the locking mechanism assembly can be disposed between the other end of the spindle and the wall constituting the body housing in the spindle rotational axis direction.
In the work tool according to the present embodiment, the lock mechanism assembly and the spindle are disposed at a distance from each other. That is, since the structure of the spindle can be uniquely designed without depending on the lock mechanism assembly, the spindle can be miniaturized.
Further, since the lock mechanism assembly is separated from the spindle, the lock mechanism assembly can be easily assembled, and only the lock mechanism assembly can be removed from the main body housing, thereby improving the workability in repair. be able to.

Further, in order to solve the above-mentioned problems, a working tool according to the present invention is a working tool that drives a tip tool to perform a predetermined processing operation on a workpiece, and includes a motor, a spindle, and a tip tool. It has a holding member and a lock mechanism.
The spindle is configured to transmit the driving force of the motor to the tip tool. The tip tool holding member is configured to be movable in the spindle rotational axis direction between a holding position for holding the tip tool and an open position for releasing the tip tool. The locking mechanism is configured to engage with the tip tool holding member placed in the holding position to lock the tip tool holding member.
The locking mechanism is further configured to be movable between an engaged position where it engages with the tip tool holding member to lock the tip tool holding member in the holding position, and a release position where the tip tool holding member is disengaged. And a collar member for supporting the clamp member.
The collar member is formed on the outside of the inner region in the cross direction in which the clamp member is disposed and has a hole for inserting the tip tool holding member and the cross direction which is a direction intersecting the spindle rotational axis direction. And an area. In this configuration, a bearing arrangement area for arranging a bearing that rotatably supports the collar member can be configured in the outer area.
When the collar member is in the engaged position, the tip tool holding member is rotated as the spindle is rotated by the motor, whereby the collar member is rotated. The bearing is arranged to stably support the rotation of the collar member, but according to the work tool according to the present invention, the lock mechanism has a compact structure by arranging the bearing in the outer region of the collar member. It is possible to contribute to the downsizing of the working tool.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the technique regarding the more rational member structure for achieving size reduction of a working tool.

It is a perspective view showing the appearance of the electric vibration tool concerning a 1st embodiment of the present invention. It is sectional drawing which shows the internal mechanism of the said electrically driven vibration tool. It is an expanded sectional view showing an important section of the electric vibration tool concerned. It is an expanded sectional view showing the lock mechanism of the electric vibration tool concerned. It is sectional drawing which shows the state which faced the said electric tool from the front side. It is an external view which shows the operation | movement in the case of replacing | changing a tip tool. It is an expanded sectional view showing operation of a lock mechanism in the case of replacing a tip tool. It is sectional drawing which shows operation | movement of the lock operation mechanism in the case of replacing | exchanging a front-end tool. It is sectional drawing which shows the internal mechanism of the electrically driven vibration tool which concerns on 2nd Embodiment of this invention. It is an expanded sectional view showing an important section of the electric vibration tool concerned.

An embodiment of a working tool according to the present invention will be described based on FIGS. 1 to 10. FIGS. 1-8 is a figure which shows the working tool which concerns on 1st Embodiment, and FIG. 9 and FIG. 10 is a figure which shows the working tool which concerns on 2nd Embodiment.
In the work tool according to the second embodiment, parts and mechanisms that perform substantially the same or similar functions as parts and mechanisms of the work tool according to the first embodiment use the same name and the same reference numerals. The explanation is omitted.

First Embodiment
A first embodiment of the present invention will be described based on FIGS. 1 to 8. In the first embodiment, an electric vibration tool is used as a working tool. As shown in FIG. 1, the electric vibration tool 100 selectively mounts, for example, a plurality of types of tip tools such as a blade and a polishing pad, vibrates the loaded tip tool, and works against the workpiece. Processing such as cutting and grinding according to the type of tool is performed. In FIG. 1, a blade 145 is attached as an example of the tip tool.
1 to 5 show a state in which the electric vibration tool 100 is mounted with the blade 145, and FIGS. 6 to 8 show a state in which the electric vibration tool 100 detaches the blade 145.

(Outline of electric vibration tool)
As shown in FIG. 1, the electric vibration tool 100 includes a resin main housing 101 that forms an outer shell of the electric vibration tool 100. The main body housing 101 is an example of the “main body housing” according to the present invention. A blade 145 is detachably mounted on one end side of the main body housing 101 in the extending direction of the main body housing 101, and a battery mounting portion 109 to which the battery 190 is removably mounted is provided on the other end side of the main body housing 101. ing. The battery 190 is configured to be attachable to and detachable from the battery mounting unit 109.

  As shown in FIG. 1, the main body housing 101 constitutes a grip portion 107 which is gripped by a worker. The grip portion 107 is elongated in an intermediate region 1012 between the front region 1011 and the rear region 1013 of the main body housing 101. The battery 190 is slid relative to the battery mounting portion 109 in a direction intersecting the extending direction of the grip portion 107 and is attached and detached. A slide switch 108 is provided at a position where the thumb is supposed to be placed when the user grips the grip portion 107. The slide switch 108 and the battery mounting unit 109 are electrically connected to the controller 180 (see FIG. 2). Therefore, by operating the slide switch 108, ON / OFF of the drive motor 115 (see FIG. 2) is switched. The ON operation of the slide switch 108 selects a first mode in which the drive motor 115 is driven at a predetermined rotational speed and a second mode in which the drive motor 115 is driven at a rotational speed higher than the first mode. Can. The controller 180 controls the drive motor 115 based on the operation of the slide switch 108.

As shown in FIG. 2, the electric vibration tool 100 has a drive mechanism 120 for driving the blade 145 and a lock mechanism 130 for making the blade 145 detachable from the main body housing 101. The lock mechanism 130 is operated by the lock operation mechanism 150 shown in FIG. As shown in FIG. 1, the lock mechanism 150 is connected to the handle portion 151 disposed outside the front side area 1011 and the handle portion 151 in the front side area 1011 and is a pivot shaft portion disposed inside the main body housing 101. And 1513. The handle portion 151 has a gripping portion 1511 gripped by the user, and a pair of arm portions 1512 extending from the gripping portion 1511. The pivot shaft portion 1513 is provided across one arm portion 1512 and the other arm portion 1512, and is connected to each arm portion 1512.
The position of the handle portion 151 shown in FIG. 1 constitutes a blade fixing position, and the position of the handle portion 151 shown in FIG. 6 constitutes a blade replacement position. In other words, when the handle portion 151 is in the blade fixing position, the locking mechanism 130 locks the blade 145 with respect to the electric vibration tool 100. When the handle portion 151 is in the blade replacement position, the lock of the blade 145 by the lock mechanism 130 is released, so that the blade 145 can be attached to and detached from the electric vibration tool 100.

FIG. 2 is a cross-sectional view of the electric vibration tool 100. The main body housing 101 accommodates the inner housing 110. The inner housing 110 has a first inner housing 1101 and a second inner housing 1102. The first inner housing 1101 and the second inner housing 1102 are both made of metal, and are connected by a connecting member 1103 such as a screw. A predetermined space area 1104 is formed between the first inner housing 1101 and the second inner housing 1102.
The inner housing 110 is connected to the main housing 101 via a plurality of elastic members 111. The elastic member 111 can suppress the transmission of the vibration generated in the inner housing 110 to the main body housing 101.
As shown in FIG. 2, the first inner housing 1101 accommodates the drive mechanism 120 and the lock mechanism 130. The lock mechanism 130 is an example of the “lock mechanism” according to the present invention. Further, as shown in FIG. 5, the pivot shaft portion 1513 of the lock operation mechanism 150 is disposed to penetrate the space area 1104.

As shown in FIG. 2, the drive mechanism 120 has a spindle 124 configured to be rotatable. The spindle rotational axis direction 124 a defines a cross direction 124 b which is a direction intersecting with the spindle rotational axis direction 124 a. The spindle 124 is an example of the "spindle" according to the present invention, the spindle rotational axis direction 124a is an example of the "spindle rotational axis direction" according to the present invention, and the cross direction 124b is the "cross direction" according to the present invention. It is an example.
In the electric vibration tool 100, the extending direction of the grip portion 107 defines the longitudinal direction 100a. A direction parallel to the spindle rotational axis direction 124a defines a height direction 100b in the vibration tool cross direction which is a direction intersecting the longitudinal direction 100a. Further, in the vibration tool cross direction, a direction intersecting both the height direction 100b and the longitudinal direction 100a defines the width direction 100c. The longitudinal direction 100a defines a front side 100a1 on which the blade 145 is disposed, and a rear side 100a2 opposite to the front side 100a1. The height direction 100b defines a lower side 100b2 on which the blade 145 is disposed, and an upper side 100b1 opposite to the lower side 100b2.

(Drive mechanism)
As shown in FIG. 2 or FIG. 3, the drive mechanism 120 is configured as a mechanism for driving the blade 145. The drive mechanism 120 mainly includes a drive motor 115, an eccentric shaft 121, a drive bearing 122, a driven arm 123, a spindle 124, and a clamp shaft 127. The drive motor 115 is an example of the “motor” according to the present invention, and the clamp shaft 127 is an example of the “tip tool holding member” according to the present invention.

As shown in FIG. 3, the drive motor 115 is configured as a brushless motor. The drive motor 115 is disposed such that the output shaft portion 117 extends in the height direction 100b. That is, the drive motor 115 is disposed in the inner housing 110 such that the motor rotation axis direction 117a is parallel to the spindle rotation axis direction 124a.
The eccentric shaft portion 121 is attached to the tip of the output shaft portion 117 of the drive motor 115, and includes an eccentric portion 1211 eccentric with respect to the motor rotational shaft direction 117a. The eccentric shaft portion 121 is rotatably supported by the bearing 121 a of the upper side 100 b 1 and the bearing 121 b of the lower side 100 b 2. The bearings 121 a and 121 b are held by the first inner housing 1101. A drive bearing 122 is provided on the outer peripheral portion of the eccentric portion 1211. The drive bearing 122 is disposed between the bearing 121a and the bearing 121b in the height direction 100b.

As shown in FIG. 3, the driven arm 123 extends in the longitudinal direction 100 a and is provided to connect the drive bearing 122 and the spindle 124. A pair of arm portions 1231 is formed in the region of the rear side 100 a 2 in the driven arm 123. The pair of arm portions 1231 is provided to abut on the outer peripheral portion of the drive bearing 122 in the width direction 100 c. In a region of the front side 100a1 of the driven arm 123, a fixing portion 1232 which surrounds and fixes a predetermined region of the spindle 124 is formed.
The driven arm 123 and the spindle 124 are disposed on the lower side 100 b 2 of the drive motor 115. With this configuration, the drive mechanism 120 can be shortened in the spindle rotational axis direction 124a.
In addition, with this configuration, it is possible to bring the blade 145 and the position of the driven arm 123 for driving the spindle 124 close to each other in the spindle rotational axis direction 124 a. Therefore, the couple generated according to the distance between driven arm 123 and blade 145 is reduced. Thereby, the vibration which arises by the effect | action of the blade 145 with respect to a to-be-processed material at the time of processing operation is suppressed.

  As shown in FIG. 3, the spindle 124 is a hollow substantially cylindrical elongated member, and has a flange-like tool holding portion 126 for holding the blade 145 together with the clamp shaft 127 on the lower side 100 b 2. The spindle 124 is rotatably supported by a bearing 124 c on the upper side 100 b 1 and a bearing 124 d on the lower side 100 b 2. The bearings 124 c and 124 d are held by the inner housing 110.

As shown in FIG. 3, the clamp shaft 127 is a substantially cylindrical member which can be inserted into the spindle 124. When the clamp shaft 127 is inserted into the spindle 124, the clamp shaft 127 is in the spindle area 1271 disposed in the spindle 124 and a fastening area 1273 extending from the lower end 1242 of the spindle 124. And an engagement region 1272 extending from the upper end 1241 of the spindle 124. The in-spindle area 1271 is an example of the "in-spindle area" according to the present invention, the fastening area 1273 is an example of the "fastening area" according to the present invention, and the engagement area 1272 is the "engagement area" according to the present invention And the lower end 1242 of the spindle 124 is an example of the “one end” according to the present invention, and the upper end 1241 of the spindle 124 is an example of the “other end” according to the present invention. It is.
As shown in FIG. 3, the fastening region 1273 is provided with an integrally formed flange-like clamp head 128. Further, a clamp member engagement groove 129 is formed in the engagement area 1272. The clamp shaft 127 is inserted into the spindle 124 and held by the lock mechanism 130, whereby the blade 145 is clamped between the clamp head 128 of the clamp shaft 127 and the tool holding portion 126 of the spindle 124.

  When the drive motor 115 is driven, the center of the eccentric portion 1211 is rotationally moved around the motor rotational axis direction 117 a by the rotation of the output shaft portion 117. As a result, the drive bearing 122 is reciprocated in the width direction 100 c, and the driven arm 123 is reciprocated in an arc around the rotation axis of the spindle 124. As a result, the blade 145 held between the spindle 124 and the clamp shaft 127 is reciprocally driven in an arc shape, and a predetermined processing operation (for example, cutting or the like) can be performed.

(Locking mechanism and biasing mechanism)
Next, the lock mechanism 130 and the biasing mechanism 140 will be described based on FIGS. 3 to 5. FIG. 4 is an enlarged sectional view showing the lock mechanism 130, and FIG. 5 is a front sectional view showing the lock mechanism 130 and the urging mechanism 140. As shown in FIG. The lock mechanism 130 is a mechanism for holding the clamp shaft 127, and the biasing mechanism 140 is a mechanism for biasing the clamp shaft 127 from the lower side 100b2 to the upper side 100b1. Although both the lock mechanism 130 and the biasing mechanism 140 are disposed in the first inner housing 1101, the region of the first inner housing 1101 in which the locking mechanism 130 and the biasing mechanism 140 are disposed is configured in a cylindrical shape. There is.

As shown in FIG. 4, the lock mechanism 130 mainly includes the clamp member 131, the collar member 135, the first coil spring 134, the lid member 137, and the bearing 135a, and these components constitute the lock mechanism assembly 1301. Do. The clamp member 131 is an example of the "clamp member" according to the present invention, the collar member 135 is an example of the "collar member" according to the present invention, and the first coil spring 134 is the "bias member" according to the present invention. The cover member 137 is an example of the “lid member” according to the present invention, the bearing 135a is an example of the “bearing” according to the present invention, and the lock mechanism assembly 1301 is the lock mechanism assembly according to the present invention. Is an example of
As shown in FIG. 3, the biasing mechanism 140 mainly includes the support member 141 and the second coil spring 142.

The structure of the biasing mechanism 140 will be described based on FIGS. 3 and 5. The support member 141 is a hollow substantially cylindrical member which inserts the engagement area 1272 of the clamp shaft 127, and is rotatably supported by the bearing 124c. The bearing 124 c is configured to support the spindle 124 and the support member 141 together. According to the configuration, it is possible to reduce the number of parts of the bearing and to shorten the spindle rotational axis direction 124 a.
In the support member 141, a flange-like coil spring support 1411 is formed on the lower side 100b2 with which the lower end of the second coil spring 142 is abutted, and a clamp member support for supporting the clamp member 131 on the upper side 100b1. A portion 1412 is formed. In addition, although mentioned later, the clamp member support part 1412 supports the clamp member 131 in the state in which the clamp member 131 was put in the position (release position) in the case of replacing | exchanging the braid | blade 145. FIG.

The outer diameter of the second coil spring 142 has an elongated region 1421 configured to be larger than the outer diameter of the spindle 124. Since the second coil spring 142 has the coil spring long area 1421, the support member 141 can be disposed in the inner area of the second coil spring 142.
As described above, the end of the lower side 100 b 2 abuts on the support member 141 as described above, and the end of the upper side 100 b 1 abuts on the collar member 135. That is, the second coil spring 142 is disposed between the upper end 1241 of the spindle 124 and the locking mechanism 130.

Next, the structure of the lock mechanism 130 will be described based on FIG. The lock mechanism 130 is disposed between the end of the upper side 100 b 1 of the support member 141 and the main body housing 101 in the spindle rotational axis direction 124 a. In other words, the locking mechanism 130 can be said to be disposed between the upper end 1241 of the spindle 124 and the wall that constitutes the main body housing 101. Since the lock mechanism 130 and the spindle 124 have independent configurations and are separately disposed, it is possible to design the lock mechanism 130 without depending on the spindle 124.
Further, since the lock mechanism 130 constitutes the lock mechanism assembly 1301, the lock mechanism 130 can be easily assembled, and only the lock mechanism assembly 1301 can be removed at the time of repair.

As shown in FIG. 4, the clamp member 131 is configured by a pair of members sandwiching the engagement area 1272 of the clamp shaft 127 in the radial direction of the clamp shaft 127. Each clamp member 131 is configured to be movable in the cross direction 124 b, and has a plurality of protrusions that can be engaged with the clamp member engagement grooves 129 formed in the clamp shaft 127 on the inner surface facing the clamp shaft 127 132 are formed. Further, the clamp member 131 has a first clamp member inclined portion 1331 and a second clamp member inclined portion 1332 which are inclined with respect to the spindle rotational axis direction 124a. The inclined surfaces of the first clamp member inclined portion 1331 and the second clamp member inclined portion 1332 are each formed in a linear shape, and the extension line of the inclined surface of the first clamp member inclined portion 1331 and the spindle rotational axis direction 124a The angle formed by and the extension line of the slope of the second clamp member inclined portion 1332 and the angle formed by the spindle rotational axis direction 124 a are the same.
In addition, a clamp member inclined connection portion 1333 is formed between the first clamp member inclined portion 1331 and the second clamp member inclined portion 1332. The clamp member inclined connection portion 1333 is a first extended region 1333a extending inward in the cross direction 124b from the end of the lower side 100b2 of the first clamp member inclined portion 1331, and an inner end portion of the first extended region 1333a And a second extending area 1333b extending in the spindle rotational axis direction 124a from the end of the upper side 100b1 of the second clamp member inclined portion 1332. The clamp member inclined connection portion 1333 allows the first clamp member inclined portion 1331 and the second clamp member inclined portion 1332 to be disposed at positions separated from each other on the spindle rotation shaft 124a. Further, in the cross direction 124b, the end of the lower side 100b2 of the first clamp member inclined portion 1331 and the end of the upper side 100b1 of the second clamp member inclined portion 1332 are adjacent to each other via the first extension region 1333a. be able to. For this reason, it becomes possible to shorten the first clamp member inclined portion 1331 and the second clamp member inclined portion 1332 in the cross direction 124b.

As shown in FIG. 4, a first coil spring 134 is disposed relative to each clamp member 131 between the clamp member 131 and the lid member 137. The first coil spring 134 biases the clamp member 131 toward the lower side 100 b 2 to stabilize the posture of the clamp member 131.
As shown in FIG. 4, the collar member 135 is a member for controlling the clamp of the clamp shaft 127 by the clamp member 131. The collar member 135 is formed outside the inner region 1351 in the cross direction 124b, with the clamp member 131 being disposed, and an inner region 1351 having a hole 1352 for inserting the engagement region 1272 of the clamp shaft 127. And an outer region 1353. The hole 1352 is an example of the “hole” according to the present invention, the inner area 1351 is an example of the “inner area” according to the present invention, and the outer area 1353 is an example of the “outside area” according to the present invention is there. The lid member 137 is arranged to cover the inner region 1351.

The collar member 135 has a collar member elongated region 1354 formed longer than the spindle 124 in the cross direction 124 b. The collar member long region 1354 allows the collar member 135 to receive the end of the upper side 100 b 1 of the second coil spring 142.
The outer region 1353 of the collar member 135 is formed with a bearing disposition area 1355 in which a bearing 135a for rotatably supporting the collar member 135 is disposed. The bearing arrangement area 1355 is an example of the “bearing arrangement area” according to the present invention. By providing the bearing arrangement area 1355, there is no need to configure the arrangement area of the bearing 135a in the area of the spindle rotational axis direction 124a in the collar member 135, so shortening of the spindle length direction 124a in the collar member 135 can be achieved. It becomes possible.
The bearing arrangement area 1355 is provided on the outer periphery of the collar member 135 in a notch shape. Thus, the bearing 135a can be compactly arranged with respect to the collar member 135.

  The outer peripheral portion of the bearing 135 a is slidably disposed on the inner housing 110. With this configuration, the lock mechanism assembly 1301 is movable on the spindle rotation shaft 124a. The outer region 1353 without the bearing 135 a has a gap with the inner housing 110. That is, in the lock mechanism assembly 1301, the bearing 135 a constitutes a contact element to the inner housing 110, and the outer region 1353 constitutes a non-contact element to the inner housing 110. With this configuration, it is possible to suppress abnormal noise generated when the lock mechanism assembly 1301 is rotated.

  The collar member 135, the clamp member 131, and the bearing 135a are disposed along the cross direction 124b. With this configuration, the lock mechanism 130 can be shortened in the spindle rotational axis direction 124a.

As shown in FIG. 4, the collar member 135 has a first collar member inclined portion 1361 and a second collar member inclined portion 1362 which are inclined with respect to the spindle rotational axis direction 124 a. The inclined surfaces of the first collar member inclined portion 1361 and the second collar member inclined portion 1362 are respectively formed in a straight line, and the extension line of the inclined surface of the first collar member inclined portion 1361 and the spindle rotational axis direction 124a And the angle formed by the extension line of the slope of the second collar member inclined portion 1362 and the spindle rotational axis direction 124 a are the same.
Also, a collar member inclined connection portion 1363 is formed between the first collar member inclined portion 1361 and the second collar member inclined portion 1362. The extending direction of the collar member inclined connection portion 1363 is parallel to the spindle rotational axis direction 124a, and the first collar member inclined portion 1361 and the second collar member inclined portion 1362 are mutually separated at the spindle rotational shaft 124a by this configuration. It can be arranged at a spaced position. The end of the lower side 100b2 of the first collar member inclined portion 1361 and the end of the upper side 100b1 of the second collar member inclined portion 1362 are respectively positioned on the spindle rotational axis direction 124a. For this reason, it is possible to shorten the first collar member inclined portion 1361 and the second collar member inclined portion 1362 in the cross direction 124b.
The first collar member inclined portion 1361 is an example of the “first collar member inclined portion” according to the present invention, and the second collar member inclined portion 1362 is an example of the “second collar member inclined portion” according to the present invention The collar member inclined connection portion 1363 is an example of the “collar member inclined connection portion” according to the present invention.

  The first collar member inclined portion 1361 and the first clamp member inclined portion 1331 are in sliding contact with each other, and the second collar member inclined portion 1362 and the second clamp member inclined portion 1332 are in sliding contact with each other. That is, the collar member 135 and the clamp member 131 constitute the sliding contact area 130a. The sliding contact area 130 a is an example of the “sliding area” according to the present invention. In the sliding contact area 130a, the first collar member inclined portion 1361 and the first clamp member inclined portion 1331 constitute a first inclined element 130b, and the second collar member inclined portion 1362 and the second clamp member inclined portion 1332 have a second inclination. The element 130c is configured. The first tilt element 130 b is an example of the “first tilt element” according to the present invention, and the second tilt element 130 c is an example of the “second tilt element” according to the present invention.

As shown in FIG. 4, while the collar member 135 is biased by the second coil spring 142, the clamp member 131 is biased by the first coil spring 134, the first collar member inclined portion 1361 is a first clamp member. The second collar member inclined portion 1362 abuts on the second clamp member inclined portion 1332 in contact with the inclined portion 1331. Thus, the clamp member 131 is moved radially inward of the clamp shaft 127. As a result, the two clamp members 131 clamp the clamp shaft 127 in a state where the convex portion 132 of the clamp member 131 and the clamp member engaging groove 129 of the clamp shaft 127 are engaged. The clamp shaft 127 is biased toward the upper side 100 b 1 by the second coil spring 142 while being clamped by the clamp member 131. As a result, the blade 145 is clamped between the clamp head 128 of the clamp shaft 127 and the tool holding portion 126 of the spindle 124.
The position of the clamp shaft 127 in this state defines a holding position for holding the blade 145, the position of the clamp member 131 defines an engagement position engaged with the clamp shaft 127, and the position of the collar member 135 is a clamp member. Define a maintenance position to maintain 131 in the engaged position. The operation for removing the blade 145 from the electric vibration tool 100 will be described later based on FIGS. 6 to 8, but in such a case, the allowable position where the collar member 135 allows the clamp member 131 to move to the release position. , And the clamp member 131 moves to the release position for disengaging the clamp shaft 127, and the clamp shaft 127 moves to the release position for releasing the blade 145.

(Lock operation mechanism)
The lock operating mechanism 150 is configured to operate the locking mechanism 130. More specifically, the lock operating mechanism 150 is configured to move the collar member 135 in the spindle rotational axis direction 124a. As the collar member 135 is moved in the spindle rotational axis direction 124a, the engagement and release of the clamp shaft 127 by the clamp member 131 are switched.
1 to 5 show a state where the lock operation mechanism 150 places the clamp member 131 in the engagement position, and FIGS. 6 to 8 show a state where the lock operation mechanism 150 can move the clamp member 131 to the release position. Indicates

As shown in FIG. 5, the pivot shaft portion 1513 connected to the handle portion 151 is placed in the main housing 101 so as to be placed in a space area 1104 formed between the first inner housing 1101 and the second inner housing 1102. Through in the width direction 100c. At both ends of the pivot shaft portion 1513, switching portions 152 configured to be able to abut on the collar member 135 are provided. The switching unit 152 is configured of a first cam portion 1521 and a second cam portion 1522. The first cam portion 1521 has a first contact portion 1521 a which can be in contact with the collar member 135 and a first notch portion 1521 b which can be separated from the collar member 135. The second cam portion 1522 has a second contact portion 1522 a that can be in contact with the collar member 135 and a second notch portion 1522 b that can be separated from the collar member 135.
In the pivot shaft portion 1513, a switching connection portion 153 is provided between the first cam portion 1521 and the second cam portion 1522. The switching connection portion 153 is constituted by an eccentric shaft portion 1531 having a rotation shaft eccentric to the rotation shaft of the rotation shaft portion 1513. That is, the switching shaft 152 and the switching connection portion 153 are provided on the rotation shaft 1513. Accordingly, the switching unit 152 and the switching connection unit 153 are rotated in conjunction with the rotation operation of the handle portion 151.

As shown in FIG. 1, when the handle portion 151 is placed at the blade fixing position, as shown in FIG. 5, the first notch portion 1521b of the switching portion 152 (first cam portion 1521, second cam portion 1522). And the second notch 1522 b is located on the upper side 100 b 1 of the collar member 135. Thus, the switching unit 152 is in a state in which the collar member 135 is open. At this time, the collar member 135 is biased toward the upper side 100b1 by the second coil spring 142, and the first collar member inclined portion 1361 and the first clamp member inclined portion 1331 and the second collar member inclined portion 1362 and the second clamp member inclined The portions 1332 abut each other. Thereby, the clamp member 131 is moved toward the clamp shaft 127, and the clamp shaft 127 is clamped by the two clamp members 131. Further, the switching connection portion 153 (eccentric shaft portion 1531) is placed at a position separated from the second inner housing 1102. Thus, transmission of vibration to the second inner housing 1102 via the switching connection portion 153 can be suppressed.
In this state, as shown in FIG. 4, the clamp member support portion 1412 of the support member 141 is not in contact with the clamp member 131.
As described above, the position of the clamp shaft 127 in this state defines a holding position for holding the blade 145, the position of the clamp member 131 defines an engagement position engaged with the clamp shaft 127, and the position of the collar member 135 A maintenance position for maintaining the clamp member 131 in the engaged position is defined.

On the other hand, when the handle portion 151 is placed at the blade replacement position as shown in FIG. 6, the first contact portion 1521a and the second contact portion 1522a of the switching portion 152 are collar members 135 as shown in FIG. And the collar member 135 is moved to the lower side 100 b 2 against the biasing force of the second coil spring 142. As a result, as shown in FIG. 7, the clamp member support portion 1412 of the support member 141 abuts on the clamp member 131, and the clamp member 131 is moved relative to the collar member 135 to the upper side 100b1.
The region of the collar member 135 where the first contact portion 1521a and the second contact portion 1522a contact is in a point-symmetrical position with respect to the spindle rotational axis direction 124a. Therefore, the first contact portion 1521a and the second contact portion 1522a contact the area of the collar member 135 separated in the cross direction 124b, so that the collar member 135 can be moved stably.

The clamp member 131 is moved relative to the collar member 135 toward the upper side 100 b 1, so that the contact between the first clamp member inclined portion 1331 and the first collar member inclined portion 1361 and the second clamp member inclined portion 1332 The abutment of the two-collar member inclined portion 1362 is released, and the clamp member 131 can move in the direction away from the clamp shaft 127 in the cross direction 124b. That is, the clamping force of the clamp shaft 127 by the clamp member 131 is reduced. In this state, the clamp shaft 127 is removed from the spindle 124 by pulling the clamp shaft 127 downward. As the clamping of the clamp shaft 127 is released, the clamping of the blade 145 is released. Thereby, the blade 145 as a tip tool can be replaced.
The position of the collar member 135 in this state defines the allowable position for allowing the clamp member 131 to move to the release position, and the position of the clamp member 131 defines the release position for releasing the engagement with the clamp shaft 127. The position of the shaft 127 defines an open position where the blade 145 is open.

  Note that, as shown in FIG. 8, the switching connection portion 153 is placed in a position in contact with the second inner housing 1102. As a result, the biasing force of the second coil spring 142 is received by the second inner housing 1102 via the lock mechanism 130, the switching portion 152 and the switching connection portion 153. That is, since the main body housing 101 does not receive the urging force of the second coil spring 142, the main body housing 101 is made of resin, and the weight of the electric vibration tool 100 can be reduced.

  As described above, the blade 145 can be removed by moving the handle portion 151 from the blade fixed position shown in FIG. 1 to the blade replacement position shown in FIG. On the other hand, the blade 145 is held between the clamp shaft 127 and the spindle 124 by moving the handle portion 151 from the blade replacing position to the blade fixing position with the clamp shaft 127 mounted with the blade 145 inserted in the spindle 124 be able to.

Second Embodiment
An electric vibration tool 200 according to a second embodiment of the present invention will be described based on FIG. 9 and FIG. The electric vibration tool 200 according to the second embodiment differs from the electric vibration tool 100 according to the first embodiment in the arrangement of the drive motor 115. That is, as shown in FIG. 9, the drive motor 115 is disposed relative to the inner housing 110 so that the motor rotational axis direction 117a intersects the spindle rotational axis direction 124a.

Since the drive motor 115 is in the arrangement form, as shown in FIG. 10, the driven arm 123 is formed such that the region between the arm portion 1231 and the fixing portion 1232 is curved. The arm portion 1231 is extended from the lower side 100b2 to the upper side 100b1, and is configured to hold the drive bearing 122 from the lower side 100b2. By making the driven arm 123 into the curved shape, the space surrounded by the drive motor 115, the eccentric shaft portion 121, and the spindle 124 inside the main body housing 101 can be effectively utilized.
In addition, since the arm portion 1231 passes through the curved region to reach the fixed portion 1232, stress concentration in the fixed portion 1232 can be avoided.
The electric vibration tool 200 includes the lock mechanism 130 and the lock operation mechanism 150 according to the electric vibration tool 100 described above. Therefore, even in the electric vibration tool 200, the same operation and function as the electric vibration tool 100 can be achieved.

  In the above, although demonstrated using electrically driven vibration tool 100, 200, a working tool is not restricted to electrically driven vibration tool. For example, the present invention may be applied to a working tool in which a tip tool rotates, such as a grinder or a circular saw, as a working tool. Moreover, although the brushless motor was used as the drive motor 115, you may utilize a motor with a brush.

In view of the meaning of the above-mentioned invention, the following modes can be constituted about the work tool concerning the present invention. Each aspect is used not only alone or in combination with each other, but also in combination with the invention described in the claims.
(Aspect 1)
A support member is disposed between the other end of the spindle and the locking mechanism,
The support member has a coil spring support for supporting the biasing member in the lower region,
The coil spring is disposed between the coil spring support and the locking mechanism.
(Aspect 2)
The support member has a clamp member support in the upper region that supports the clamp member when the clamp member is in the release position.
(Aspect 3)
The bearing that supports the spindle is also used as the bearing that supports the support member.
(Aspect 4)
The lock mechanism assembly is slidably disposed in the inner housing in the axial direction of the spindle.
(Aspect 5)
In the lock mechanism assembly, the bearing constitutes a sliding contact element to the inner housing, and the collar member constitutes a noncontact element to the inner housing.

(Correspondence between each component of the present embodiment and each component of the present invention)
The correspondence of each component of this embodiment and each component of the present invention is shown as follows. In addition, this embodiment shows an example of the form for implementing this invention, and this invention is not limited to the structure of this embodiment.
The electric vibration tools 100 and 200 are examples of the "working tool" according to the present invention. The blade 145 is an example of the “tip tool” according to the present invention. The main body housing 101 is an example of the “main body housing” according to the present invention. The lock mechanism 130 is an example of the “lock mechanism” according to the present invention. The spindle 124 is an example of the "spindle" according to the present invention. The spindle rotational axis direction 124 a is an example of the “spindle rotational axis direction” according to the present invention. The cross direction 124 b is an example of the “cross direction” according to the present invention. The drive motor 115 is an example of the “motor” according to the present invention. The clamp shaft 127 is an example of the “tip tool holding member” according to the present invention. The in-spindle area 1271 is an example of the “in-spindle area” according to the present invention. The fastening area 1273 is an example of the “fastening area” according to the present invention. The engagement area 1272 is an example of the “engagement area” according to the present invention. The lower end 1242 of the spindle 124 is an example of the "one end" according to the present invention. The upper end 1241 of the spindle 124 is an example of the “other end” according to the present invention. The clamp member 131 is an example of the “clamp member” according to the present invention. The collar member 135 is an example of the “collar member” according to the present invention. The first coil spring 134 is an example of the “biasing member” according to the present invention. The lid member 137 is an example of the “lid member” according to the present invention. The bearing 135a is an example of the "bearing" according to the present invention. The lock mechanism assembly 1301 is an example of the “lock mechanism assembly” according to the present invention. The first clamp member inclined portion 1331 is an example of the “first clamp member inclined portion” according to the present invention. The second clamp member inclined portion 1332 is an example of the “second clamp member inclined portion” according to the present invention. The clamp member inclined connection portion 1333 is an example of the “clamp member inclined connection portion” according to the present invention. The hole 1352 is an example of the “hole” according to the present invention. The inner region 1351 is an example of the “inner region” according to the present invention. The outer region 1353 is an example of the “outer region” according to the present invention. The bearing arrangement area 1355 is an example of the “bearing arrangement area” according to the present invention. The sliding contact area 130 a is an example of the “sliding area” according to the present invention. The first inclined element 130 b is an example of the “first inclined element” according to the present invention. The 2nd inclination element 130c is an example of the "2nd inclination element" which concerns on this invention.

100, 200 electric vibration tools (work tools)
100a longitudinal direction 100a1 front side 100a2 rear side 100b height direction 100b1 upper side 100b lower side 100c width direction 101 body housing 1011 front area 1012 middle area 1013 rear area 107 grip section 108 slide switch 109 battery mounting section 110 inner housing 1101 first inner surface Housing 1102 Second inner housing 1103 Connecting member 1104 Space area 111 Elastic member 115 Drive motor (motor)
117 Output shaft 117a Motor rotation shaft direction 120 Drive mechanism 121 Eccentric shaft 1211 Eccentric 121a Bearing 121b Bearing 122 Drive bearing 123 Driven arm (transmission member)
1231 arm portion 1232 fixing portion 124 spindle 1241 upper end 1242 lower end 124a spindle rotational axis direction 124b cross direction 124c bearing 124d bearing 126 tool holding portion 127 clamp shaft (tip tool holding member)
1271 In-spindle area 1272 engagement area 1273 fastening area (tip tool fastening area)
128 clamp head 129 clamp member engagement groove 130 lock mechanism 1301 lock mechanism assembly 130a sliding contact area 130b first inclined element 130c second inclined element 131 clamp member 132 convex part 1331 first clamp member inclined part 1332 second clamp member inclined part 1333 clamp member inclined connection area 1333a first extending area 1333b second extending area 134 first coil spring (biasing member)
135 collar member 1351 inner region 1352 hole portion 1353 outer region 1354 collar member elongated region 1355 bearing arrangement region 135a bearing 1361 first collar member inclined portion 1362 second collar member inclined portion 1363 collar member inclined connection region 137 lid member 140 biased Mechanism 141 support member 1411 coil spring support portion 1412 clamp member support portion 142 second coil spring 1421 coil spring long region 145 blade (tip tool)
150 Lock operation mechanism (operation mechanism)
151 handle portion 1511 grip portion 1512 arm portion 1513 pivot shaft portion (handle pivot shaft portion)
152 switching portion 1521 first cam portion 1521a first abutting portion 1521b first cutout portion 1522 second cam portion 1522a second abutting portion 1522b second cutout portion 153 switching connecting portion 1531 eccentric shaft portion 180 controller 190 battery

Claims (8)

A working tool that drives a tip tool to perform a predetermined processing operation on a workpiece;
Motor,
A spindle for transmitting the driving force of the motor to the tip tool;
A tip tool holding member configured to be movable in the spindle rotational axis direction between a holding position for holding the tip tool and an open position for releasing the tip tool;
A locking mechanism which engages with the tip tool holding member placed in the holding position to lock the tip tool holding member;
The lock mechanism is
It is configured to be movable between an engagement position in which the tip tool holding member is engaged to lock the tip tool holding member in the holding position, and a release position in which the tip tool holding member is disengaged. A clamp member,
And a collar member for supporting the clamp member,
The clamp member and the collar member have a sliding contact area in sliding contact with each other,
The sliding contact area has a first inclination element which is inclined with respect to the spindle rotational axis direction, and a second inclination element which is inclined with respect to the spindle rotational axis direction.
The first inclined element and the second inclined element are arranged to be separated from each other in the spindle rotational axis direction.
Further, the first and second inclined elements are characterized in that the first and second inclined elements are disposed outside of the second inclined element when viewed from the spindle rotation axis. tool. A working tool according to claim 1, wherein
The first inclined element has a first clamp member inclined portion provided on the clamp member and a first collar member inclined portion provided on the collar member,
The second inclined element has a second clamp member inclined portion provided on the clamp member and a second collar member inclined portion provided on the collar member,
The clamp member connects the first clamp member inclined portion and the second clamp member inclined portion, and has a clamp member inclined connection portion extending in the spindle rotational axis direction.
A work tool characterized in that the collar member connects the first collar member inclined portion and the second collar member inclined portion and has a collar member inclined connection portion extending in the spindle rotational axis direction. A working tool according to claim 1 or 2, wherein
A working tool characterized in that the extending direction of the first inclined element and the extending direction of the second inclined element have extending components parallel to each other. The working tool according to any one of claims 1 to 3, wherein
The collar member is disposed on the outer side of the inner region in an intersecting direction in which the clamp member is disposed and which has a hole for inserting the tip tool holding member and a direction intersecting the spindle rotational axis direction. And an outer region formed on the
A working tool characterized in that a bearing arrangement area for arranging a bearing that rotatably supports the collar member is configured in the outer area. A working tool according to claim 4, wherein
A working tool, wherein the clamp member, the collar member, and the bearing are disposed along the cross direction. A working tool according to claim 4 or 5, wherein
It has a body housing which constitutes at least a part of an outer shell of the working tool,
The lock mechanism is disposed between the collar member, the clamp member, the bearing, a lid member covering at least a part of the inner region of the collar member, the lid member and the clamp member. A lock mechanism assembly having a biasing member;
A work tool characterized in that the locking mechanism assembly is assembled to the body housing. In the work tool according to claim 6,
The spindle is hollow and has one end and the other end in the spindle rotational axis direction.
The tip tool holding member includes an in-spindle area disposed in the spindle, a tip tool fastening area extending from the one end and configured to be connectable with the tip tool, and the other end. And an engagement region extending from and configured to be engageable with the clamp member,
The working tool according to claim 1, wherein the locking mechanism assembly is disposed between the other end and a wall portion of the main body housing in the spindle rotational axis direction. A working tool that drives a tip tool to perform a predetermined processing operation on a workpiece;
Motor,
A spindle for transmitting the driving force of the motor to the tip tool;
A tip tool holding member configured to be movable along a spindle rotational axis direction between a holding position for holding the tip tool and an open position for releasing the tip tool;
A locking mechanism which engages with the tip tool holding member placed in the holding position to lock the tip tool holding member;
The lock mechanism is
It is configured to be movable between an engagement position in which the tip tool holding member is engaged to lock the tip tool holding member in the holding position, and a release position in which the tip tool holding member is disengaged. A clamp member,
And a collar member for supporting the clamp member,
The collar member is disposed on the outer side of the inner region in an intersecting direction in which the clamp member is disposed and which has a hole for inserting the tip tool holding member and a direction intersecting the spindle rotational axis direction. And an outer region formed on the
A working tool characterized in that a bearing arrangement area for arranging a bearing that rotatably supports the collar member is configured in the outer area.

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