WO2015182605A1

WO2015182605A1 - Knock-in tool

Info

Publication number: WO2015182605A1
Application number: PCT/JP2015/065092
Authority: WO
Inventors: 秋葉　美隆; 勲宮下; 荒田　憲
Original assignee: 株式会社マキタ
Priority date: 2014-05-28
Filing date: 2015-05-26
Publication date: 2015-12-03
Also published as: JP2015223673A

Abstract

[Problem] To provide an improved technique pertaining to wear reduction of a member for driving a driver in a knock-in tool. [Solution] This nail gun (100) has: an electric motor (111), an intermediate roller (115) driven by the electric motor (111); a drive roller (120) driven by the intermediate roller (115); and a driver (130) that, driven by the drive roller (120), moves along a prescribed lengthwise axis to perform a striking operation for striking a nail (151). The drive roller (120) is moveable between a separated position separated from the intermediate roller (115), and an abutting position abutting the intermediate roller (115). When the drive roller (120) is positioned at the separated position, striking action is disabled, and when the drive roller (120) is positioned at the separated position, striking action is enabled.

Description

Driving tool

The present invention relates to a driving tool for driving a driving material.

Japanese Patent Application Laid-Open No. 2008-073805 describes a driving machine driven by an electric motor. This driving machine has a drive gear driven by an electric motor and a driven gear meshing with the drive gear. The driven gear is held by the tilting plate so as to always mesh with the drive gear. And a driven gear contact | abuts to a driver support stand because a tilting plate rotates with respect to the center of a drive gear. The driver support is moved by the rotation of the driven gear, whereby the nail is hit and driven by the driver.

According to the above driving machine, the drive gear and the driven gear are engaged and rotated to drive the nail. However, since the drive gear and the driven gear are always engaged, However, when the electric motor is driven, the drive gear and the driven gear mesh with each other to maintain the rotation. When the drive gear and the driven gear are engaged with each other and driven, the drive gear and the driven gear are worn. Therefore, in the configuration in which the drive gear and the driven gear are always meshed, there is room for improvement against wear.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an improved technique related to wear reduction of a member for driving a driver in a driving tool.

The above problem is solved by the present invention. According to the preferable form of the driving tool of the present invention, the driving tool for driving the driving material is configured. The driving material preferably includes nails, staples and the like. Accordingly, the driving tool preferably includes a nailing machine, a staple gun, a tucker and the like. The driving tool includes a motor, a rotating member that is driven to rotate by the motor, a driver that moves linearly along a predetermined long axis, and performs a driving operation for driving out the driving material, and is driven to rotate by the rotating member. And a driving roller for driving the driver so that the driver moves along the long axis and performs a driving operation by moving the driver in a tangential direction on the outer peripheral surface with the outer peripheral surface contacting the driver. Therefore, the tangential direction of the outer peripheral surface of the driving roller when the driving roller contacts the driver and moves the driver is parallel to or coincides with the predetermined long axis direction in which the driver moves when performing the driving operation. The drive roller is movable between a separation position separated from the rotation member and a contact position in contact with the rotation member in proximity to the rotation member. When the drive roller is located at the separation position, the drive roller is not driven to rotate by the rotating member, and the driving operation by the driver is restricted. On the other hand, when the driving roller is located at the contact position, the driving roller is driven to rotate by the rotating member, and the driving operation by the driver is allowed. The rotating member may be a motor shaft, a roller-shaped member attached to the motor shaft, or a roller-shaped member that is arranged in parallel with the motor shaft and driven by the rotation of the motor shaft. May be.

According to the present invention, the driving roller for driving the driver can move between the separation position and the contact position. That is, the driving roller can be separated from the rotating member as necessary. Accordingly, when the driver performs the driving operation, the driving roller is brought into contact with the rotating member, and when the driver does not perform the driving operation, the driving roller is separated from the rotating member. Therefore, while the driving roller is away from the rotating member, no abrasion occurs between the driving roller and the rotating member even if the motor is driven. As a result, wear of the driving roller and the rotating member is reduced.

According to a further aspect of the driving tool of the present invention, the tool has a tool body that accommodates a rotating member, a driver, and a driving roller. This tool body is also referred to as a body housing. The rotating member is arranged so that the rotation axis of the rotating member intersects a predetermined long axis. Note that the rotation axis and the long axis intersect each other means that the rotation axis and the long axis are arranged on the same plane and have an intersection, and the rotation shaft and the long axis extend in different directions without having an intersection. Preferably included. In addition, an injection port through which the driving material is driven out is provided at the end of the tool body in a predetermined major axis direction. Then, with respect to a predetermined major axis direction, a separation position of the drive roller is set in the internal space of the tool body on the injection port side from the rotation axis of the rotation member, and closer to the rotation axis of the rotating body than the separation position. The contact position of the drive roller is set at the position.

According to the further form of the driving tool of the present invention, the rotating member abutting portion that abuts the rotating member and the driver abutting portion that abuts the driver are formed on the outer peripheral surface of the driving roller. The rotating member contact portion is set in a different area from the driver contact portion with respect to the rotation axis direction of the drive roller. Typically, the rotating member contact portion of the drive roller is formed in each of the one end side region and the other end side region of the drive roller with respect to the rotation axis direction of the drive roller. It is formed in an intermediate region between the one end side region and the other end side region of the drive roller. As a result, the wear of the driving roller is reduced as compared with a configuration in which the rotating member and the driver abut on a single region of the outer peripheral surface of the driving roller.
Preferably, the length in the radial direction of the drive roller between the rotation shaft of the drive roller and the rotating member contact portion is set as the first length. On the other hand, the radial length of the drive roller between the rotation shaft of the drive roller and the driver contact portion is set as a second length different from the first length. Thereby, the rotational speed of the rotating member is changed by the driving roller, and the driver performs a driving operation. Therefore, the moving speed of the driver as the driving speed of the driving material is appropriately set.

According to a further aspect of the driving tool of the present invention, a concave portion is formed on one of the outer peripheral surface of the drive roller and the outer peripheral surface of the rotating member. On the other hand, a convex portion that engages with the concave portion is formed on the other outer peripheral surface of the outer peripheral surface of the driving roller and the outer peripheral surface of the rotating member. Then, at least one contact surface of the recess-side contact surface and the protrusion-side contact surface that contact each other when the recess and the protrusion engage with each other is inclined with respect to the rotation axis in a cross section including the rotation axis. It is formed as follows. A rotating member contact portion is formed on the recess-side contact surface or the projection-side contact surface formed on the outer peripheral surface of the drive roller. Typically, the recess is configured as a substantially V-shaped groove. And it is comprised so that a wedge effect may arise by engagement of a recessed part and a convex part. Due to the wedge action, the rotating member and the driving roller are stably engaged, and the energy loss of rotation transmitted from the rotating member to the driving roller is reduced.

According to a further aspect of the driving tool of the present invention, the driver is formed as a long member extending in a predetermined major axis direction. A driving roller is provided on one side of the driver with respect to the direction intersecting the predetermined major axis direction, and the driver is in contact with the driver on the other side of the driver so as to be movably supported in the predetermined major axis direction. One support roller is provided. Typically, the support roller is disposed at a position corresponding to the contact position of the drive roller with respect to the long axis direction of the driver. As a result, the driver is clamped by the support roller and the driving roller, and the driver is driven.

According to a further aspect of the driving tool of the present invention, the driver is formed as a long member extending in a predetermined major axis direction. A driving roller is provided on one side of the driver with respect to the direction intersecting the predetermined major axis direction, and the driver is in contact with the driver on the other side of the driver to support the driver so as to be movable in the predetermined major axis direction. A support roller is provided. The two support rollers are arranged at different positions with respect to a predetermined major axis direction. Further, when the drive roller is located at the contact position, the drive roller contacts the corresponding driver region between the two support rollers to drive the driver. That is, the contact position of the drive roller is set between the two support rollers with respect to the long axis direction of the driver. Typically, the contact position of the drive roller is set at the midpoint between the two support rollers. Therefore, even when the contact position of the drive roller is moved due to the fluctuation of the drive voltage in the driving tool, the drive roller contacts the driver supported as the both-end support beams by the two support rollers. . As a result, the driver driving operation along the predetermined major axis direction is stably performed by the two support rollers and the driving roller.

According to a further aspect of the driving tool of the present invention, the driving tool has a driving roller moving device that moves the driving roller between the separation position and the contact position. The drive roller moving device includes an electromagnetic actuator.

ADVANTAGE OF THE INVENTION According to this invention, the improvement technique regarding the wear reduction of the member for driving a driver in a driving tool is provided.
Other features, actions, and advantages of the present invention can be readily understood with reference to the specification, claims, and accompanying drawings.

It is sectional drawing which shows the whole structure of the nailing machine of 1st Embodiment of this invention. FIG. 2 is a sectional view taken along line II-II in FIG. It is a figure which shows the nail driving | operation which a drive roller contacts a middle roller and a driver, drives a driver, and drives out a nail. It is a figure which shows the state which nailed the nail into the workpiece in the nailing operation. FIG. 5 is a sectional view taken along line VV in FIG. 3. FIG. 6 is a sectional view taken along line VI-VI in FIG. 4. It is sectional drawing which shows the whole structure of the nailing machine of 2nd Embodiment of this invention.

The configurations and methods according to the above and the following description are separately or separately from other configurations or methods in order to realize the manufacture and use of the “driving tool” according to the present invention and the use of the components of the “driving tool”. Can be used in combination. Exemplary embodiments of the present invention include these combinations and will be described in detail with reference to the accompanying drawings. The following detailed description is only to teach those skilled in the art with detailed information to implement preferred embodiments of the invention, and the scope of the invention is not limited by the detailed description, but is limited by the scope of the claims. It is determined based on the description. For this reason, combinations of configurations and method steps in the following detailed description are not all essential to implement the present invention in a broad sense, but are described in detail with reference numerals in the accompanying drawings. However, only representative embodiments of the present invention are disclosed.
(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS. In the first embodiment, a nailing machine will be described as an example of a driving tool. As shown in FIG. 1, the nailing machine 100 is configured mainly with a main body 101 and a magazine 150. The main body 101 includes a drive mechanism housing 103, a driver guide 105, and a handle 107. The drive mechanism housing portion 103 is formed as a housing and houses the drive mechanism 110 for driving out the nail 151. The driver guide 105 is connected to the drive mechanism housing portion 103 so as to extend in a predetermined axial direction on the distal end side of the nailing machine 100. A driver passage 106 is formed in the driver guide 105 and communicates with the internal space of the drive mechanism housing portion 103. The driver passage 106 is opened at the tip side as an injection port 106a. The handle 107 constitutes a grip part so as to be held by an operator, and is connected to the drive mechanism housing part 103 so as to extend in a direction intersecting a predetermined axis in which the driver guide 105 extends. . A battery 160 is detachably attached to the tip of the handle 107. The magazine 150 can accommodate a plurality of nails 151 and is attached to the driver guide 105. The nails 151 accommodated in the magazine 150 are supplied to the driver passage 106 one by one and are driven out from the injection port 106 a by the driver 130. This driver 130 is an implementation configuration example corresponding to the “driver” in the present invention. Moreover, the injection port 106a is an implementation structural example corresponding to the "injection port" in this invention.

For the convenience of explanation, the front end side of the driver guide 105 is defined as the front side of the nailing machine 100 with respect to a predetermined axial direction (left-right direction in FIG. 1), and the drive mechanism housing portion 103 on the opposite side to the front end side of the driver guide 105. The side is defined as the rear side of the nailing machine 100. Further, with respect to a direction (vertical direction in FIG. 1) perpendicular to the predetermined axial direction, the front end side of the handle 107 is defined as the lower side of the nailing machine 100, and the drive mechanism housing portion on the opposite side to the front end side of the handle 107 The 103 side is defined as the upper side of the nailing machine 100.

As shown in FIGS. 1 and 2, the drive mechanism 110 is mainly composed of an electric motor 111, an intermediate roller 115, a drive roller 120, and a driver 130. A pulley 112 is connected to the rotating shaft of the electric motor 111. An intermediate roller 115 is disposed on the front side of the pulley 112. The intermediate roller 115 is rotatably supported by the drive mechanism housing portion 103 with a rotating shaft 116 via a bearing. That is, the position of the intermediate roller 115 is unchanged. The pulley 112 and the intermediate roller 115 are connected by a drive belt 113. Therefore, the rotation of the electric motor 111 is transmitted to the intermediate roller 115 via the pulley 112. Note that a pinion gear may be provided on the rotating shaft of the electric motor 111, and gear teeth that engage with the pinion gear may be provided on the outer peripheral portion of the intermediate roller 115. That is, the electric motor 111 and the intermediate roller 115 may be coupled by a gear instead of the drive belt 113. This electric motor 111 is an implementation configuration example corresponding to the “motor” in the present invention. The intermediate roller 115 is an implementation configuration example corresponding to the “rotating member” in the present invention.

The drive roller 120 is disposed between the intermediate roller 115 and the driver 130, and transmits the rotation of the intermediate roller 115 to the driver 130 to cause the driver 130 to move in a predetermined axial direction (both the long axis direction and the front-rear direction of the driver 130). It is a member to be moved. The drive roller 120 can be moved with respect to a predetermined axial direction by an electromagnetic actuator 121. Specifically, the drive roller 120 has a rotating shaft 120a, and the holding hole 122a of the arm 122 holds the rotating shaft 120a rotatably. When the arm 122 is moved in the long axis direction of the driver 130 by the electromagnetic actuator 121, the driving roller 120 is moved. The holding hole 122a is formed at the tip (front side) of the arm 122,
It is formed as a long hole that is long in the vertical direction (vertical direction in FIG. 1) intersecting the long axis direction (front-rear direction) of the driver 130. Therefore, the rotation shaft 120 a of the drive roller 120 is configured to be able to rotate in the holding hole 122 a and to move in the vertical direction with respect to the arm 122. A play in the vertical direction of the driving roller 120 is provided by the holding hole 122a. As described above, the drive roller 120 is held so as to be movable in the front-rear direction and the vertical direction of the nailing machine 100. This drive roller 120 is an implementation configuration example corresponding to the “drive roller” in the present invention.

A support roller 123 is provided above the drive roller 120 with the driver 130 interposed therebetween. Further, a stopper 124a disposed on the upper side and a stopper 124b disposed on the lower side are provided behind the driving roller 120 and the electromagnetic actuator 121 (on the right side in FIG. 1). As a result, the driver 130 is held between the drive roller 120 and the support roller 123 and between the upper stopper 124a and the lower stopper 124b.

The driver 130 is a long member, and is driven by the driving roller 120 and moved in the front-rear direction. The front end portion of the driver 130 is configured as a striking portion 131 for striking the nail 151. The hitting portion 131 is formed in a prismatic shape. The rear end portion of the driver 130 is configured as a flange-like locking portion 132. An engaging portion 133 that can be engaged with the driving roller 120 is formed on the front side between the striking portion 131 and the locking portion 132, and an engaging portion that cannot be engaged with the driving roller 120 on the rear side of the engaging portion 133. A mating release portion 134 is formed. The driver 130 is provided so as to be movable in the front-rear direction in a driver passage 106 formed in the driver guide 105. The nail 151 is supplied to the driver passage 106 from the magazine 150, and the driver 130 moves forward in the driver passage 106, so that the nail 151 is hit and the nail 151 is driven out from the injection port 106. That is, the driver 130 performs a nail 151 driving operation (also referred to as a nail driving operation). Note that the driver 130 is always biased by a coil spring (not shown) so as to be positioned at a position (also referred to as an initial position) shown in FIG.

A trigger 140 operated by an operator is provided on the front side of the proximal end portion of the handle 107 on the drive mechanism housing portion 103 side. The trigger 140 is normally urged forward and is moved backward by being operated by an operator. A trigger switch (not shown) is connected to the trigger 140. When the trigger 140 is located at the front position (position shown in FIG. 1), the trigger switch is in the OFF state, and when the trigger 140 is located at the rear position (position shown in FIG. 3), the trigger switch is turned on. State.

Further, a contact arm 141 is provided at the front end of the driver guide 105. The contact arm 141 is normally urged forward and is moved rearward in contact with the workpiece. A contact arm switch (not shown) is connected to the contact arm 141. When the contact arm 141 is located at the front position (position shown in FIG. 1), the contact arm switch is in an OFF state, and when the contact arm 141 is located at the rear position (position shown in FIG. 3), the contact The arm switch is in the ON state.

Next, driving of the nailing machine 100 will be described. As shown in FIG. 1, the drive roller 120 does not contact the intermediate roller 115 when the drive roller 120 is positioned in the front position close to the tip of the driver guide 105 in the front-rear direction. That is, the drive roller 120 is located in an empty space in front of the drive mechanism housing portion 103. In the nailing machine 100 in which the driver guide 105 projects forward from the drive mechanism housing portion 103, an empty space is easily formed in front of the drive mechanism housing portion 103. By arranging the driving roller 120 in this empty space, the driving roller 120 is arranged at a predetermined interval with respect to the intermediate roller 115. In other words, the position of the driving roller 120 disposed in the empty space of the driving mechanism housing portion 103 defines the front position, and at this time, the driving roller 120 and the intermediate roller 115 are separated from each other. Therefore, the rotation of the intermediate roller 115 is not transmitted to the driving roller 120, and the driver 130 is not driven. The forward position of the driver 130 is an implementation configuration example corresponding to the “separated position” in the present invention. When the contact arm 141 is pressed against the workpiece by the operator, a controller (not shown) supplies current from the battery 160 to the electric motor 111. When the trigger 140 is further pulled, the controller supplies a current from the battery 160 to the electromagnetic actuator 121.

Specifically, as shown in FIG. 3, when the contact arm 141 is pressed against the workpiece, the contact arm switch is turned on, the electric motor 111 is driven by the controller, and the intermediate roller 115 is moved to the timepiece. Rotated around. Before the trigger 140 is operated, the trigger switch is in the OFF state, and the electromagnetic actuator 121 is not driven. Accordingly, since the driving roller 120 remains at the front position and is separated from the intermediate roller 115, only the intermediate roller 115 is rotated. This state is also referred to as an idling state or a preparation state.

When the trigger 140 is operated and the trigger switch is turned on, the electromagnetic actuator 121 is driven by the controller, and the driving roller 120 is moved from the front position to the rear position. The rear position of the driver 120 is an implementation configuration example corresponding to the “contact position” in the present invention. The drive roller 120 contacts the intermediate roller 115 when moved from the front position to the rear position. Since the driving roller 120 can move in the vertical direction of the nailing machine 100 by the holding hole 122a of the arm 122, the driving roller 120 moves upward in the holding hole 122a, so that the driving roller 120 and the intermediate roller 115 are moved. The impact due to contact is reduced. That is, the impact caused by the contact between the driving roller 120 and the intermediate roller 115 is alleviated by the play of the driving roller 120 in the vertical direction of the nailing machine 100.

When the driving roller 120 is located at the rear position, the driving roller 120 is firmly joined to the intermediate roller 115 and the driver 130 by the wedge action of the engaging portion 133 of the intermediate roller 115 and the driver 130. Further, since the support roller 123 is disposed at the same position as the rear position of the drive roller 120 in the front-rear direction of the nailing machine 100, the driver 130 is stably held between the drive roller 120 and the support roller 123. This support roller 123 is an implementation structural example corresponding to the "single support roller" in this invention. When the driving roller 120 is located at the rear position, the driving roller 120 contacts the intermediate roller 115 and rotates counterclockwise. As a result, the rotation of the drive roller 120 causes the driver 130 to move forward (in the tangential direction of the drive roller 120) against the urging force of a coil spring (not shown) that urges the driver 130. The nail 151 is hit. As a result, as shown in FIG. 4, the nail 151 is driven out from the injection port 106, and the nail driving operation is performed. That is, the operation for the contact arm 141 shifts to a preparation state for driving the nail 151, and the nail 151 is driven by the subsequent operation of the trigger 140. In other words, the nailing operation is performed by operating the contact arm 141 and the trigger 140 in this order.

As shown in FIG. 4, when the driver 130 is moved forward, the locking portion 132 formed at the rear end portion of the driver 130 contacts the

stoppers

124a and 124b. At this time, the drive roller 120 faces the disengagement part 134 of the driver 130, and the engagement (contact) between the drive roller 120 and the driver 134 is released. When the contact arm 141 is released from the workpiece after the nail 151 is driven, the contact arm switch is turned off, and the controller drives the electromagnetic actuator 121 to move the drive roller 120 to the front position shown in FIG. Move to. As a result, the driver 130 that has driven out the nail 151 is returned to the initial position by the biasing force of the coil spring. The driving of the driving mechanism 110 as described above completes the nail driving work.

Next, engagement of the intermediate roller 115, the drive roller 120, and the driver 130 when the drive roller 120 is located at the rear position will be described. As shown in FIG. 5, a belt contact portion 117 and

engagement grooves

118 a and 118 b are formed on the outer peripheral surface of the intermediate roller 115 over the entire circumference in the circumferential direction of the intermediate roller 115. In the axial direction of the intermediate roller 115 (vertical direction in FIG. 5), the belt contact portion 117 is formed as a concave portion that is recessed in the radial direction in the intermediate region of the intermediate roller 115. As shown in FIGS. 2 and 5, the drive belt 113 comes into contact with the belt contact portion 117, and the rotation of the pulley 112 is transmitted to the intermediate roller 115. 5 corresponds to the upper side of the nail driver 100, and the right side of FIG. 5 corresponds to the right side when the nailing machine 100 is viewed from the front side, and the lower side of FIG. 5 corresponds to the left side when the nailing machine 100 is viewed from the front side.

As shown in FIG. 5,

engagement grooves

118a and 118b formed as substantially V-shaped grooves are formed in the right and left regions of the belt contact portion 117, respectively. In the

engagement grooves

118a and 118b,

contact surfaces

119a and 119b that contact the

engagement protrusions

125a and 125b of the drive roller 120 are formed. Specifically, in the right engagement groove 118a, the right inclined surface of the V-shaped groove is set as the contact surface 119a, and in the left engagement groove 118b, the left side of the V-shaped groove is set. The inclined surface is set as the contact surface 119b. The contact surface 119a and the contact surface 119b are formed symmetrically with respect to a cross section passing through the center of the intermediate roller 115 in the axial direction and orthogonal to the rotation shaft 116 of the intermediate roller 115. As described above, with respect to the axial direction of the intermediate roller 115, a region that engages with the drive belt 113 is set in the intermediate region, and a region that engages with the drive roller 120 is located outside the intermediate region (the right and left regions). Each is set.

As shown in FIG. 5, on the outer peripheral surface of the drive roller 120, engagement

convex portions

125 a and 125 b that can be engaged with the intermediate roller 115 and

driver engagement grooves

127 a and 127 b that can be engaged with the driver 130 are provided. Are formed over the entire circumference in the circumferential direction. The engaging

convex portions

125 a and 125 b are formed so as to protrude in the radial direction of the driving roller 120. Engaging

protrusions

125 a and 125 b are provided at two locations on the right and left sides of the driving roller 120 corresponding to the engaging

grooves

118 a and 118 b of the intermediate roller 115. The engaging

convex portions

125a and 125b and the engaging

grooves

118a and 118b are implementation examples corresponding to the “convex portion” and the “concave portion” in the present invention, respectively. The inclined surface on the right side of the engaging convex portion 125a is set as an abutting surface 126a capable of contacting the abutting surface 119a of the engaging groove 118a, and the inclined surface on the left side of the engaging convex portion 125b on the left side is engaged. It is set as a contact surface 126b that can contact the contact surface 119b of the groove 118b. The contact surfaces 126a and 126b and the

contact surfaces

119a and 119b are implementation examples corresponding to the “convex-side contact surface” and the “concave-side contact surface” in the present invention, respectively. The contact surface 126a and the contact surface 126b pass through the center of the drive roller 120 in the axial direction, and are formed symmetrically with respect to a cross section orthogonal to the rotation shaft 120a of the drive roller 120. The driving roller 120 and the intermediate roller 115 are point contacts, and the contact points are shown as black circles on the

contact surfaces

126a and 126b (

contact surfaces

119a and 119b) in FIG. The contact point of the

contact surfaces

126a and 126b with the intermediate roller 115 is an implementation configuration example corresponding to the “rotating member contact portion” in the present invention.

Further, a driver engagement groove 127a is formed on the left side of the engagement convex portion 125a, and a driver engagement groove 127b is formed on the right side of the engagement convex portion 125b. The

driver engagement grooves

127a and 127b are formed as substantially V-shaped grooves.

Contact surfaces

128a and 128b that contact the engaging portion 133 of the driver 130 are formed in the

driver engaging grooves

127a and 127b. Specifically, in the driver engagement groove 127a, the right inclined surface of the V-shaped groove is set as the contact surface 128a, and in the driver engagement groove 127b, the left inclined surface of the V-shaped groove. Is set as the contact surface 128b. The contact surface 128 a and the contact surface 128 b are formed symmetrically with respect to a cross section passing through the center of the drive roller 120 in the axial direction and orthogonal to the rotation shaft 120 a of the drive roller 120. As described above, with respect to the axial direction of the driving roller 120, an area that engages with the driver 130 is set in the intermediate area, and areas that engage with the intermediate roller 115 are areas outside the intermediate area (right and left areas), respectively. Is set.

As shown in FIG. 5, the driver 130 is formed with engaging

convex portions

135 a and 135 b that can engage with the

driver engaging grooves

127 a and 127 b of the driving roller 120. The engaging

projections

135a and 135b are formed so as to protrude downward from the nail driver 100. The engaging

convex portions

135a and 135b are provided at two locations on the right side and the left side of the driver 130 corresponding to the

driver engaging grooves

127a and 127b of the driving roller 120. The right inclined surface of the engagement convex portion 135a is set as a contact surface 136a capable of contacting the contact surface 128a of the driver engagement groove 127a, and the left inclined surface of the left engagement convex portion 135b is a driver surface. It is set as a contact surface 136b that can contact the contact surface 128b of the engagement groove 127b. The contact surface 136a and the contact surface 136b pass through the center of the driver 130 in the left-right direction (the vertical direction in FIG. 5) and are formed symmetrically with respect to the vertical axis of the nailing machine 100. The driver 130 and the driving roller 120 are in point contact, and the contact points are shown as black circles on the

contact surfaces

136a and 136b (

contact surfaces

128a and 128b) in FIG.
The contact points of the

contact surfaces

128a and 128b with the driver 130 are an implementation configuration example corresponding to the “driver contact portion” in the present invention.

Therefore, the distance r2 between the center of the rotating shaft 120a of the driving roller 120 and the point contacting the driver 130 is shorter than the distance r1 between the center of the rotating shaft 120a of the driving roller 120 and the point contacting the intermediate roller 115. Is set to As a result, the speed of the driver 130 is reduced with respect to the rotational speed of the intermediate roller 115.

As shown in FIGS. 3 and 5, when the driving roller 120 is moved to the rear position, the contact surface 126a and the contact surface 119a contact each other, and the contact surface 126b and the contact surface 119b contact each other. The rotation is transmitted to the drive roller 120. At this time, the

contact surfaces

119a and 119b are formed as symmetric inclined surfaces, and the

contact surfaces

126a and 126b are formed as symmetric inclined surfaces. Therefore, in the engagement between the intermediate roller 115 and the drive roller 120, the wedge action Is generated, and sliding between the contact surfaces is suppressed. Therefore, the rotation of the intermediate roller 115 is efficiently transmitted to the drive roller 120. If any one of the

contact surfaces

119a, 119b, 126a, and 126b is inclined with respect to the rotation axis of the intermediate roller 115 or the drive roller 120, a wedge action can be generated. Preferably, at least one of the contact surfaces of the

contact surfaces

119a and 119b and the

contact surfaces

126a and 126b is configured as a symmetrical inclined surface.

Further, in the drive roller 120 and the driver 130, the contact surface 128a and the contact surface 136a, the contact surface 128b and the contact surface 136b contact each other, and the driver 130 is moved from the position shown in FIG. It is moved forward to the position shown in FIG. Thereby, the nail 151 is driven out and a nail driving operation is performed. In the engagement between the driving roller 120 and the driver 130, the sliding between the contact surfaces is suppressed by the wedge action. Therefore, the rotation of the driving roller 120 is efficiently transmitted to the driver 130. Note that if any one of the

contact surfaces

128a, 128b, 136a, and 136b is inclined with respect to the rotation axis of the drive roller 120, a wedge action can be generated. Preferably, at least one of the

contact surfaces

128a and 128b and the

contact surfaces

136a and 136b is configured as a symmetrical inclined surface.

As shown in FIG. 4, when the driver 130 is moved forward and the disengagement unit 134 faces the drive roller 120, the engagement between the drive roller 120 and the driver 130 is released. Specifically, as shown in FIG. 6, since the engagement release portion 134 is not formed with the engagement convex portion 135, the driver 130 does not engage with the drive roller 120. Therefore, the driver 130 is returned to the initial position by a coil spring (not shown). At this time, the drive roller 120 is moved to the front position shown in FIG.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. The nailing machine 200 according to the second embodiment is different from the nailing machine 100 according to the first embodiment in the configuration of the support roller that supports the driver 130. The configuration other than the support roller is the same as that of the first embodiment, and the same reference numerals are given and description thereof is omitted.

As shown in FIG. 7, the nailing machine 200 includes two

support rollers

223a and 223b. The support roller 223a and the support roller 223b are arranged side by side in the front-rear direction (the left-right direction in FIG. 7) of the nailing machine 200. The rear position of the driving roller 120 corresponds to the space between the front support roller 223a and the rear support roller 223b in the front-rear direction of the nailing machine 200. Therefore, the driver 130 is held by the two

support rollers

223a and 223b and the drive roller 120 between the support roller 223a and the support roller 223b so that the driver 130 is opposed to the nail 151 disposed in the driver passage 106. Is done. Specifically, in the nailing machine 200 driven by the battery 160, the driving force of the electromagnetic actuator 121 may vary depending on the remaining amount of the battery 160. Therefore, an error may occur in the rear position of the drive roller 120 depending on the remaining amount of the battery 160. However, in the nailing machine 200 of the second embodiment, the driver 130 is supported by the two

support rollers

223a and 223b as both-end support beams. The rear position of the driving roller 120 is set between the fulcrums (

rollers

223a and 223b) of the driver 130 supported as both-end support beams. As a result, even when the rear position of the driving roller 130 is slightly shifted in the front-rear direction due to the remaining amount of the battery 160, the driver 130 is driven in a state where it is reliably facing the nail 151. The

support rollers

223a and 223b are an implementation configuration example corresponding to “two support rollers” in the present invention.

According to each embodiment described above, when the driving roller 120 is located at the front position, it does not contact the intermediate roller 115. Therefore, wear of the drive roller 120 and the intermediate roller 115 is reduced as compared with the configuration in which the drive roller 120 is always in contact with the intermediate roller 115. In addition, since the coupling between the intermediate roller 115 and the driving roller 120 is not a gear coupling but a friction coupling by a roller, even when the driving roller 120 is brought into contact with and coupled to the rotating intermediate roller 115, the gear teeth. The intermediate roller 115 and the driving roller 120 are reliably coupled without causing problems such as chipping.

Also, a wedge action occurs in the engagement between the intermediate roller 115 and the driving roller 120. Therefore, energy loss between the intermediate roller 115 and the driving roller 120 is reduced, and rotation is efficiently transmitted from the intermediate roller 115 to the driving roller 120. Further, since the wedge action also occurs in the engagement between the driving roller 120 and the driver 130, similarly, the energy loss between the driving roller 120 and the driver 130 is reduced, and the driver 130 is driven efficiently.

Further, on the outer peripheral surface of the drive roller 120, the area engaged with the intermediate roller 115 and the area engaged with the driver 130 are set as different areas. Therefore, compared with the case where the region where the driving roller 120 and the intermediate roller 115 are engaged and the region where the driving roller 120 and the driver 130 are engaged are set as the same region, the wear on the outer peripheral surface of the driving roller 120 is reduced. The Further, since the region where the driving roller 120 and the intermediate roller 115 are engaged and the region where the driving roller 120 and the driver 130 are engaged are set as different regions, the distances from the rotation center of the driving roller 120 to the respective regions are set. Can be different. As a result, the speed of the driver 130 can be reduced in accordance with the speed (rotational speed) of the intermediate roller 115 that drives the drive roller 120.

In each of the above embodiments, driving means other than the electromagnetic actuator 121 may be used to move the driving roller 120. For example, the driving roller 120 may be moved by driving a motor. Further, a drive device other than the coil spring for returning the driver 130 to the initial position may be provided.

In each of the above embodiments, the drive roller 120 is moved substantially parallel to the long axis direction of the driver 130, but the present invention is not limited to this. For example, the drive roller 120 may be moved in an arc along the outer periphery of the intermediate roller 115.

In each of the above embodiments, the intermediate roller 115 is configured to transmit the rotation to the drive roller 120, but the present invention is not limited to this. For example, the pulley 112 may be configured to directly engage the drive roller 120 without using the intermediate roller 115.

Further, in each of the above embodiments, the nail driving operation is performed by operating the contact arm 141 and the trigger 140 in this order. However, the present invention is not limited to this. For example, the nailing operation may be performed by operating the trigger 140 and the contact arm 141 in this order. In this case, the electric motor 111 is driven by operating the trigger 140, and the electromagnetic actuator 121 is driven by pressing the contact arm 141 against the workpiece.

In view of the gist of the above invention, the driving tool according to the present invention can be configured as follows. 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)
The drive roller moves substantially parallel to the long axis direction of the driver, and moves between the separation position and the contact position.
(Aspect 2)
The driving roller is sandwiched between the driver and the rotating member by the wedge action of the driver and the rotating member, and the driving roller driven to rotate by the rotating member drives the driver linearly along a predetermined long axis.
(Aspect 3)
The rotating member contact portion of the driving roller is formed in each of the one end side region and the other end side region of the driving roller with respect to the rotation axis direction of the driving roller,
The driver contact portion of the drive roller is formed in an intermediate region between the one end side region and the other end side region of the drive roller.
(Aspect 4)
A concave portion formed on one of the driving roller and the rotating member and a convex portion formed on the other of the driving roller and the rotating member are engaged so as to cause a wedge action.
(Aspect 5)
At the tip of the driver, a striking part for striking the driving material is formed,
A flange-shaped locking part is formed at the rear end of the driver,
A stopper that engages with the locking portion and restricts the forward movement of the driver is provided.
(Aspect 6)
The driver has an engageable area in which the drive roller can be engaged and an unengageable area in which the drive roller cannot be engaged.
With respect to the long axis direction of the driver, the engageable region is formed on the tip side of the non-engageable region.
(Aspect 7)
A convex portion that can be engaged with the driving roller is formed in the region where the driver can be engaged.
(Aspect 8)
The rotating member is arranged so that the rotation axis direction of the rotating member intersects the long axis direction of the driver.
(Aspect 9)
When the contact arm is pressed against the workpiece, the motor is driven,
By operating the trigger, the electromagnetic actuator is driven, and the drive roller is moved from the separated position to the contact position.
(Aspect 10)
When the contact arm switch is ON, the motor is driven,
When the trigger switch is in the ON state, the electromagnetic actuator is driven, and the drive roller is moved from the separated position to the contact position.
(Aspect 11)
When the trigger is operated, the motor is driven,
When the contact arm is pressed against the workpiece, the electromagnetic actuator is driven, and the drive roller is moved from the separated position to the contact position.
(Aspect 12)
When the trigger switch is on, the motor is driven,
When the contact arm switch is in the ON state, the electromagnetic actuator is driven, and the drive roller is moved from the separated position to the contact position.

(Correspondence between each component of this embodiment and each component of the present invention)
The correspondence between each component of the present embodiment and each component of the present invention is 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 motor 111 is an example of a configuration corresponding to the “motor” of the present invention.
The intermediate roller 115 is an example of a configuration corresponding to the “rotating member” of the present invention.
The drive roller 120 is an example of a configuration corresponding to the “drive roller” of the present invention.
The forward position of the driver 120 is an example of a configuration corresponding to the “separated position” of the present invention.
The rear position of the driver 120 is an example of a configuration corresponding to the “contact position” of the present invention.
The support roller 123 is an example of a configuration corresponding to the “single support roller” of the present invention.
The driver 130 is an example of a configuration corresponding to the “driver” of the present invention.
The

support rollers

223a and 223b are an example of a configuration corresponding to “two support rollers” of the present invention.

DESCRIPTION OF SYMBOLS 100 Nailing machine 101 Main body part 103 Drive mechanism accommodating part 105 Driver guide 106 Driver path 106a Injection port 107 Handle 110 Drive mechanism 111 Electric motor 112 Pulley 113 Drive belt 115 Intermediate roller 116 Rotating shaft 117

Belt contact part

118a, 118b

Engagement Groove

119a, 119b Contact surface 120 Drive roller 120a Rotating shaft 121 Electromagnetic actuator 122 Arm 122a Holding hole 123

Support roller

124a,

124b Stopper

125a, 125b

Engagement protrusion

126a,

126b Contact surface

127a, 127b

Driver engagement groove

128a, 128b Contact surface 130 Driver 131 Strike part 132 Locking part 133 Engagement part 134

Disengagement part

135a, 135b Engagement

convex part

136a, 136b Contact surface 140 Trigger 141 Contact arm 50 magazine 151 nail 160

battery

223a, 223b support rollers

Claims

A driving tool for driving a driving material,
A motor,
A rotating member that is rotationally driven by the motor;
A driver that performs a driving operation to move linearly along a predetermined long axis to drive out the driving material;
The driver is driven to rotate by the rotating member, and the driver moves along the long axis so that the driver moves in a tangential direction on the outer peripheral surface by contacting the driver. A drive roller for driving the driver as described above,
The drive roller is configured to be movable between a separation position separated from the rotation member and a contact position in contact with the rotation member in proximity to the rotation member.
When the driving roller is located at the separated position, the driving roller is not driven to rotate by the rotating member, and the driving operation by the driver is restricted,
The driving tool according to claim 1, wherein when the driving roller is located at the contact position, the driving roller is rotationally driven by the rotating member to allow a driving operation by the driver.
The driving tool according to claim 1,
A tool body that houses the rotating member, the driver, and the driving roller;
The rotating member is arranged so that the rotation axis of the rotating member intersects the predetermined long axis,
An end of the tool body in the predetermined long axis direction is provided with an injection port through which a driving material is driven,
With respect to the predetermined long axis direction, the separation position of the drive roller is set in the internal space of the tool main body on the injection port side from the rotation axis of the rotation member, and the rotating body is more than the separation position. A driving tool characterized in that the abutting position is set at a position close to the rotation axis.
The driving tool according to claim 1 or 2,
On the outer peripheral surface of the drive roller, a rotating member abutting portion that abuts on the rotating member and a driver abutting portion that abuts on the driver are formed,
The driving tool according to claim 1, wherein the rotating member contact portion is set in a region different from the driver contact portion with respect to a rotation axis direction of the drive roller.
The driving tool according to claim 3,
The rotating member contact portion of the driving roller is formed in one end side region and the other end side region of the driving roller with respect to the rotation axis direction of the driving roller, respectively.
The driving tool, wherein the driver contact portion of the drive roller is formed in an intermediate region between the one end side region and the other end side region of the drive roller.
The driving tool according to claim 3 or 4,
The length in the radial direction of the drive roller between the rotation shaft of the drive roller and the rotation member abutting portion is set as a first length, and between the rotation shaft of the drive roller and the driver abutment portion. The driving tool is characterized in that a radial length of the drive roller is set as a second length different from the first length.
The driving tool according to any one of claims 1 to 5,
A concave portion is formed on one outer peripheral surface of the outer peripheral surface of the driving roller and the outer peripheral surface of the rotating member,
A convex portion that engages with the concave portion is formed on the other outer peripheral surface of the outer peripheral surface of the drive roller and the outer peripheral surface of the rotating member,
At least one of the concave-side contact surface and the convex-side contact surface that contact each other when the concave portion and the convex portion are engaged with each other is inclined with respect to the rotational axis in a cross section including the rotational shaft. A driving tool characterized in that it is formed.
The driving tool according to claim 6,
The driving tool according to claim 1, wherein the concave portion and the convex portion are configured to engage with each other so as to cause a wedge action.
The driving tool according to any one of claims 1 to 7,
The driver is formed as a long member extending in the predetermined long axis direction,
The driving roller is provided on one side of the driver with respect to a direction intersecting the predetermined long axis direction, and the driver is brought into contact with the driver on the other side of the driver to move the driver in the predetermined long axis direction. A driving tool characterized in that it is provided with a single support roller that supports it.
The driving tool according to any one of claims 1 to 7,
The driver is formed as a long member extending in the predetermined long axis direction,
The driving roller is provided on one side of the driver with respect to a direction intersecting the predetermined long axis direction, and the driver is brought into contact with the driver on the other side of the driver to move the driver in the predetermined long axis direction. Two support rollers are provided to support it,
The two support rollers are arranged at different positions with respect to the predetermined major axis direction,
When the driving roller is located at the contact position, the driving roller is configured to contact the corresponding driver region between the two support rollers to drive the driver. tool.
The driving tool according to any one of claims 1 to 9,
A driving roller moving device that moves the driving roller between the separation position and the contact position;
The driving roller moving device includes an electromagnetic actuator.