JP2016047590A - Driving machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving machine which provides excellent operability and finishing degree and suppresses failure.SOLUTION: A driving machine comprises a housing, a motor, a nose part, a magazine, a driving part for driving a stopper while moving in a driving direction, a first energization part for accelerating the driving part in the driving direction, a weight part moving in a counter-driving direction when the driving part moves in the driving direction, a second energization part for accelerating the weight part in the counter-driving direction, and a driving mechanism for releasing elastic energy after the elastic energy is accumulated in the first energization part and the second energization part. The drive mechanism comprises a rotor having a first surface and a second surface. The rotor comprises a first cam part for accumulating the elastic energy in the first energization part by moving the driving part in the counter-driving direction according to the rotation of the motor, and a second cam part for accumulating the elastic energy in the second energization part by moving the weight part in the driving direction. The first cam part protrudes from either one of the first surface and the second surface, and the second cam part protrudes from the other one of the first surface and the second surface.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a driving machine, and more particularly to an electric driving machine.

  Conventionally, fasteners such as narrow nails for finishing with small diameter nails have been widely used when mounting materials such as skirting boards and peripheral edges of building interiors to buildings. A driving machine for driving into the insert is also widely used. In such a driving machine, a trigger for operating the driving operation, a nose in which an injection port for injecting the stopper is formed, a plunger for hitting the stopper, and a plunger in the hitting direction of the stopper. A spring for biasing, a compression release mechanism for compressing and releasing the spring, and a motor for driving the compression release mechanism are provided. The spring in which elastic energy is accumulated by the compression is released to accelerate the plunger in the striking direction and stop. 2. Description of the Related Art A driving machine configured to drive a tool into a driven material from an injection port is known (Patent Document 1).

  The compression release mechanism in the driving machine includes a gear having a power transmission pin. When the gear rotates by driving the motor, the cam moves the plunger to compress the spring. Moreover, in the said driving machine, a stop can be driven by operating a trigger in the state which contact | abutted the nose to the to-be-struck material.

JP 2011-056613 A

  In the above-mentioned driving machine, when the stopper is driven, a reaction occurs in the driving machine body as a reaction to the acceleration of the plunger, so that the nose is hit before the stopper is completely driven into the workpiece. May be separated from the insert. For this reason, there is a problem that the stopper is not completely driven into the workpiece and a part of the stopper is protruded from the workpiece and the finishing degree of the work is deteriorated. In addition, when the user presses the nose more than necessary on the workpiece to suppress the reaction, the workpiece may be damaged, and there is a problem that the finishing degree of the work is deteriorated. Furthermore, in the above-described driving machine, the spring is compressed by moving the plunger in the counter-blowing direction against the urging force of the spring with the power transmission pin provided only on one side of the gear. When the power transmission pin receives a force in the striking direction from the plunger in the compression process, a striking force is intermittently applied to the gear and the portion supporting the gear. For this reason, when the number of times the driving machine is used increases, the gear and the part supporting the gear may be damaged, which causes a problem of the driving machine.

  Then, an object of this invention is to provide the driving machine which made the operativity and finishing grade favorable, and suppressed the failure by suppressing the reaction which arises in the driving machine main body.

  In order to solve the above problems, the present invention provides a housing, a motor accommodated in the housing, a nose portion for injecting a stopper, a magazine for supplying the stopper to the nose portion, and a housing in the housing. A striking portion that is provided so as to reciprocate and moves in the striking direction and strikes the stopper supplied to the nose portion, and elastic energy is accumulated by the movement of the striking portion in the counter striking direction. A first urging portion for accelerating the striking portion in the striking direction by releasing elastic energy; and a reciprocating motion provided in the housing so that the striking portion moves in the counter striking direction when moving in the striking direction. A weight portion configured to move, and a second urging force that accumulates elastic energy by movement of the weight portion in the striking direction and accelerates the weight portion in the counter striking direction by releasing the accumulated elastic energy Department and A driving mechanism for releasing the accumulated elastic energy after accumulating elastic energy in the first urging portion and the second urging portion, and the driving mechanism includes the first surface and the first urging portion. A second surface that is the surface opposite to the surface, and is rotated by driving the motor, and the striking portion is moved in the counter striking direction along with the rotation to accumulate elastic energy in the first biasing portion. A rotating body having a first cam portion to be moved and a second cam portion for moving the weight portion in the striking direction along with the rotation and accumulating elastic energy in the second urging portion. And a second cam portion protruding from either one of the first surface and the second surface. To do.

  According to such a configuration, when the striking portion moves in the striking direction and strikes the stopper (in driving), the weight portion moves in the counter striking direction, so that reaction and vibration during driving are suppressed. be able to. Thereby, the operativity of a driving machine can be made favorable and the finishing degree of work can be made favorable. In addition, the weight part while resisting the urging force of the first cam part for driving the striking part and the second urging part for moving the striking part in the counter striking direction while the rotating body resists the urging force of the first urging part. Since the second cam portion for driving the weight portion that moves the weight member in the striking direction is provided, the elastic member accumulates in each of the first urging portion and the second urging portion, which conflicts with the rotating body. Directional force is applied. For this reason, compared with the case where only the force of one direction is added to a rotating body, the load which the part which is supporting the rotating body and the rotating body bears can be made substantially equal in a reciprocating motion. Can be reduced. Thereby, damage to the rotating body and the part supporting the rotating body can be suppressed, failure of the driving machine itself can be suppressed, and the driving machine can have a long life. Further, since the rotating body has both the first cam portion for driving the striking portion and the second cam portion for driving the weight portion, the striking portion is moved and elastic energy is accumulated in the first biasing portion. In addition to the mechanism, there is no need to separately provide a mechanism for moving the weight portion and accumulating elastic energy in the second urging portion. For this reason, suppression of the recoil of the driving machine main body can be realized with a simple configuration and low cost. Furthermore, since the first cam portion is provided on the first surface and the second cam portion is provided on the second surface, which is the surface opposite to the first surface, the driving surface is driven on the same surface. Compared to the case where the first cam portion and the second cam portion for driving the weight portion are provided, the configuration of the rotating body, the striking portion and the weight portion can be simplified, and the configuration of the driving machine itself is simplified. Can be

  In the above configuration, the first urging portion is configured to be compressed in the counter striking direction by the movement of the striking portion in the counter striking direction and accumulate elastic energy, and the second urging portion is Preferably, the weight portion is compressed in the striking direction by movement of the weight portion in the striking direction to accumulate elastic energy.

  According to such a structure, elastic energy can be accumulated in the 1st urging part and the 2nd urging part by compressing the 1st urging part and the 2nd urging part in the opposite direction, respectively. For this reason, by releasing the elastic energy, the striking portion and the weight portion can be accelerated in opposite directions.

  In addition, one of the first urging portion and the second urging portion has a first elastic portion and a second elastic portion, and either the first urging portion or the second urging portion. The other is preferably provided between the first elastic part and the second elastic part as viewed from the reciprocating direction.

  According to such a configuration, the moment generated in the driving machine at the time of driving can be suppressed. That is, the moment about the virtual axis orthogonal to the striking direction and the direction from the first elastic part to the second elastic part can be suppressed. For this reason, it can suppress that a driving machine rotates at the time of driving, and can improve operativity.

  Further, the striking portion has a wall portion and a claw portion defining an inner space, and the rotating body and the weight portion are accommodated in the inner space when viewed from the reciprocating direction, and the second surface Is positioned closer to the weight portion than the first surface, and the claw portion protrudes in a direction from the wall portion toward the first surface when viewed from the reciprocating direction, and is accompanied by the rotation of the rotating body. In this case, it is preferable to be configured to contact the first cam portion and move the hitting portion in the counter hitting direction.

  According to such a configuration, since the striking portion is located outside the weight portion as viewed from the reciprocating direction, so-called hitting can be performed. Thereby, a stopper can be driven in against a wall etc. and workability | operativity can be improved.

  The weight portion includes a wall portion and a claw portion defining an inner space, and the rotating body and the striking portion are accommodated in the inner space when viewed from the reciprocating direction, and the first surface Is located on the striking portion side with respect to the second surface, and the claw portion protrudes in a direction from the wall portion toward the second surface as seen from the reciprocating direction, and with the rotation of the rotating body It is preferable that the weight portion is moved in the striking direction by contacting the second cam portion.

  According to such a configuration, the weight portion is larger than the striking portion because the weight portion is positioned outside the striking portion as viewed from the reciprocating direction. For this reason, since the mass of a weight part can be made heavy, the reaction at the time of driving | operation can be suppressed more.

  Preferably, the drive mechanism includes at least three or more rotating bodies, and the at least three or more rotating bodies are arranged side by side in the reciprocating direction.

  According to such a configuration, since the plurality of rotating bodies are arranged side by side in the reciprocating direction, the moving distance of the striking portion and the weight portion can be increased. Thereby, driving force can be enlarged.

  According to the driving machine of the present invention, it is possible to provide a driving machine in which the operability and the finishing degree are improved and the failure is suppressed.

It is a partial cross section side view which shows the internal structure of the whole nailing machine by the 1st Embodiment of this invention, an outer side movement part is located in a bottom dead center, and an inner side movement part is located in a top dead center It is a figure which shows a state. It is a partial cross section side view which shows the drive mechanism and striking mechanism of the nail driver by the 1st Embodiment of this invention, an outer side movement part is located in a top dead center, and an inner side movement part is located in a bottom dead center. FIG. FIG. 3 is a rear perspective view showing a driving mechanism and a striking mechanism of the nail driver according to the first embodiment of the present invention. It is a front side perspective view which shows the drive mechanism and striking mechanism of the nail driver by the 1st Embodiment of this invention. It is a rear surface side perspective view showing the hitting mechanism of the nail driver according to the first embodiment of the present invention. It is a front side perspective view which shows the striking mechanism of the nail driver by the 1st Embodiment of this invention. It is VII-VII sectional drawing of FIG. 1 which shows the striking mechanism of the nail driver by the 1st Embodiment of this invention. It is a VIII-VIII sectional view of Drawing 1 showing a drive mechanism and a striking mechanism of a nail driver according to a 1st embodiment of the present invention. FIG. 9 is a cross-sectional view taken along the line IX-IX of FIG. 7 showing a striking mechanism of the nail driver according to the first embodiment of the present invention, wherein the outer moving portion is located at the bottom dead center and the inner moving portion is located at the top dead center. It shows the state. FIG. 8 is a cross-sectional view taken along the line IX-IX of FIG. 7 showing a striking mechanism of the nail driver according to the first embodiment of the present invention, wherein the outer moving portion is located at the top dead center and the inner moving portion is located at the bottom dead center. It shows the state. It is a figure which shows the outer side moving part main body of the nailing machine by the 1st Embodiment of this invention, (a) is a rear side perspective view, (b) is a front side perspective view. FIG. 9 is a cross-sectional view taken along the line XII-XII of FIG. 8 illustrating the operation of the drive mechanism and the outer moving unit according to the first embodiment of the present invention, where (a) is a time t0, (b) is a time t1, and (c) is a time. t2 and (d) show the state at time t3, and (e) shows the state at time t4. FIG. 9 is a cross-sectional view taken along the line XIII-XIII of FIG. 8 illustrating the operation of the drive mechanism and the inner moving unit according to the first embodiment of the present invention, where (a) is time t0, (b) is time t1, and (c) is time. t2 and (d) show the state at time t3, and (e) shows the state at time t4. It is a partial cross section side view which shows the internal structure of the whole nailing machine by the 2nd Embodiment of this invention, an outer side movement part is located in a top dead center, and an inner side movement part is located in a bottom dead center It is a figure which shows a state. It is a partial cross section side view which shows the striking mechanism of the nail driver by the 2nd Embodiment of this invention, and the state which the outer side movement part is located in a top dead center, and the inner side movement part is located in a bottom dead center FIG. It is a partial cross section side view which shows the drive mechanism and striking mechanism of the nail driver by the 3rd Embodiment of this invention, an outer side movement part is located in a bottom dead center, and an inner side movement part is located in a top dead center. FIG.

  A driving machine according to an embodiment of the present invention will be described with reference to FIGS. In the following description, when a specific numerical value is mentioned, for example, when referring to “90 °” for an angle, “2000 rpm” for a rotational speed, “20 ms” for a time, etc., the numerical values are completely the same. Not only the case but also the case where it is substantially the same as the numerical value is included. In addition, when referring to the positional relationship, for example, when referring to parallel, orthogonal, opposite, etc., not only when it is completely parallel, orthogonal, opposite, etc., but also substantially parallel, substantially orthogonal, substantially opposite, etc. Including some cases.

  First, a nailing machine 1 which is a driving machine according to a first embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the nail driver 1 includes a housing 2, a motor 3, a drive mechanism 4, an outer moving portion 54 that strikes a not-shown nail that is a stopper, and a reaction during a driving operation. A striking mechanism 5 having an inner moving part 52 for suppressing the above, a nose part 6 and a magazine 7 are provided. The nail driver 1 is an electric type and is a tool for driving a nail into a material to be driven such as a skirting board or a peripheral edge. FIG. 1 is a partial cross-sectional side view showing the internal structure of the entire nailing machine 1, showing a state in which the outer moving part 54 is located at the bottom dead center and the inner moving part 52 is located at the top dead center. FIG. In FIG. 1, the direction in which the magazine 7 is provided with respect to the nose portion 6 is defined as the rear direction, and the direction opposite to the rear direction is defined as the front direction. The direction in which the magazine 7 is provided with respect to the motor 3 is defined as the downward direction, and the direction opposite to the downward direction is defined as the upward direction. Further, when the nailer 1 is viewed from the rear, the left is defined as the left direction, and the right is defined as the right direction.

  As shown in FIG. 1, the housing 2 is an outer part of the nailing machine 1 and is made of a resin such as nylon or polycarbonate. The housing 2 includes a handle portion 21, a motor housing portion 22, a rear connection portion 23, and a mechanism housing portion 24.

  The handle portion 21 is a portion that is gripped by the user when the nail driver 1 is used, and has a substantially cylindrical shape extending in the front-rear direction. The handle portion 21 includes a trigger 21A and a switch mechanism 21B. The trigger 21 </ b> A is a switch for operating the drive of the motor 3 and is provided below the front portion of the handle portion 21. The switch mechanism 21B is housed above the trigger 21A inside the handle portion 21, and is turned on when the trigger 21A is pushed upward.

  The motor housing portion 22 extends in the front-rear direction in parallel with the handle portion 21 and includes the motor 3 and the speed reduction mechanism 31. The motor 3 is housed in the approximate center in the front-rear direction inside the motor housing portion 22 and has a rotating shaft 3A. The rotating shaft 3A is a shaft extending in the front-rear direction, and rotates by driving the motor 3.

  The speed reduction mechanism 31 is a planetary gear mechanism, and is provided in front of the motor 3 inside the motor housing portion 22. The speed reduction mechanism 31 includes a planetary gear disposed around the rotation shaft 3A and meshed with the rotation shaft 3A, a ring gear disposed coaxially with the rotation shaft 3A, and a carrier gear 31A that rotates coaxially with the rotation shaft 3A. And. The planetary gear is rotatably supported by the carrier 31A and revolves around the rotation shaft 3A. When the planetary gear performs the revolution, the rotation of the rotation shaft 3A is decelerated and transmitted to the carrier gear 31B via the carrier 31A. The carrier gear 31 </ b> B meshes with the drive mechanism 4 and transmits the rotational force of the rotation shaft 3 </ b> A to the drive mechanism 4. In the present embodiment, the speed reduction mechanism 31 is a one-stage planetary gear mechanism, but may be a multi-stage planetary gear mechanism.

  The rear connection part 23 extends in the vertical direction and connects the rear part of the handle part 21 and the rear part of the motor housing part 22. The rear connection unit 23 includes a control board 23A and a power supply connection unit 23B. The control board 23 </ b> A is a flat board including an electric circuit (not shown) and a switching element such as an FET, and is accommodated in the rear connection portion 23. The control board 23A is connected to the motor 3, the switch mechanism 21B, the first micro switch 24A described later, and the second micro switch 7A described later, and the switch mechanism 21B, the first micro switch 24A and the second micro switch 7A. The nailer 1 is controlled on the basis of the signals output from the nails.

  The power supply connection portion 23B is formed on the rear surface of the rear connection portion 23 so that the battery pack P can be mounted. The battery pack P has a plurality of secondary battery cells serving as a driving source for the nail driver 1 therein. The power connection part 23B is configured to be able to supply the power of the secondary battery cell to the motor 3 and the control board 23A in a state where the battery pack P is mounted.

  The mechanism housing portion 24 extends in the vertical direction and is connected to the front end portion of the handle portion 21 and the front end portion of the motor housing portion 22. The mechanism accommodating portion 24 includes a drive mechanism 4, a striking mechanism 5, and a first micro switch 24A.

  As shown in FIGS. 2 to 4, the drive mechanism 4 includes a gear holder 41, a first gear 42, and a second gear 43. FIG. 2 is a partial cross-sectional side view showing the drive mechanism 4 and the striking mechanism 5, and shows a state where the outer moving part 54 is located at the top dead center and the inner moving part 52 is located at the bottom dead center. It is. FIG. 3 is a rear perspective view showing the drive mechanism 4 and the striking mechanism 5, and FIG. 4 is a front perspective view showing the drive mechanism 4 and the striking mechanism 5.

  As shown in FIG. 2, the gear holder 41 is a member extending in the vertical direction and is fixed to the inner wall of the rear portion of the mechanism housing portion 24, and includes a carrier insertion portion 41 </ b> A, a first support shaft 41 </ b> B, and a second support. It has a shaft 41C.

  As shown in FIGS. 2 and 3, the carrier insertion portion 41 </ b> A has a substantially rectangular parallelepiped shape and is provided at the lower end portion of the gear holder 41. An insertion hole 41a is formed in the carrier insertion portion 41A. The insertion hole 41a is a hole that penetrates the carrier insertion portion 41A in the front-rear direction, and the carrier gear 31B of the speed reduction mechanism 31 is inserted therethrough.

  As shown in FIG. 2, the first support shaft 41B is a shaft extending in the front-rear direction, and is provided so as to protrude forward from the gear holder 41 above the carrier insertion portion 41A. The second support shaft 41C is a shaft extending in the front-rear direction, and is provided so as to protrude forward from the gear holder 41 above the first support shaft 41B.

  The first gear 42 is a spur gear having a substantially circular shape when viewed from the front, and is supported by the first support shaft 41B so as to be rotatable about the axis of the first support shaft 41B. The first gear 42 meshes with the carrier gear 31B, and is driven to rotate clockwise in front view as the carrier gear 31B rotates. A first rear surface 42A is defined on the rear surface of the first gear 42, and a first front surface 42B is defined on the front surface. The first gear 42 includes a first rear cam 42C and a first front cam 42D. The first gear 42 is an example of a rotating body.

  The first rear surface 42A is a surface of the first gear 42 on the motor 3 side, and is orthogonal to the rotation axis of the first gear 42 (the axis of the first support shaft 41B). The first front surface 42 </ b> B is a surface of the first gear 42 on the side opposite to the motor 3, that is, a surface opposite to the first rear surface 42 </ b> A, and is orthogonal to the rotational axis of the first gear 42. The first rear surface 42A is an example of a first surface, and the first front surface 42B is an example of a second surface.

  The first rear cam 42C is a roller cam, and is provided so as to protrude rearward from a position spaced a predetermined amount from the rotational axis of the first gear 42 on the first rear face 42A. The first rear cam 42 </ b> C performs a circular motion around the rotation axis of the first gear 42 in the rear view as the first gear 42 rotates. The first rear cam 42C is configured to move the outer moving portion 54 of the striking mechanism 5 upward in accordance with the rotation of the first gear 42, that is, the circular motion. The first rear cam 42C is an example of a first cam portion.

  The first front cam 42D is a roller cam, and is provided so as to protrude forward from a position spaced a predetermined amount from the rotational axis of the first gear 42 on the first front surface 42B. The first front cam 42 </ b> D performs a circular motion around the rotation axis of the first gear 42 in front view as the first gear 42 rotates. The first front cam 42D is configured to move the inner moving portion 52 of the striking mechanism 5 downward along with the rotation of the first gear 42, that is, the circular motion. The first front cam 42D is an example of a second cam portion.

  The second gear 43 is a spur gear having a substantially circular shape when viewed from the front, and is supported by the second support shaft 41C so as to be rotatable about the axis of the second support shaft 41C. The second gear 43 meshes with the first gear 42 and is driven to rotate counterclockwise by the rotation of the first gear 42 when viewed from the front. A second rear surface 43A is defined on the rear surface of the second gear 43, and a second front surface 43B is defined on the front surface. The second gear 43 includes a second rear cam 43C and a second front cam 43D. The second gear 43 is an example of a rotating body.

  The second rear surface 43A is a surface of the second gear 43 on the motor 3 side, and is orthogonal to the rotation axis of the second gear 43 (the axis of the second support shaft 41C). The second front surface 43 </ b> B is a surface of the second gear 43 on the side opposite to the motor 3, that is, a surface opposite to the second rear surface 43 </ b> A, and is orthogonal to the rotational axis of the second gear 43. The second rear surface 43A is an example of a first surface, and the second front surface 43B is an example of a second surface.

  The second rear surface cam 43C is a roller cam, and is provided so as to protrude rearward from a position spaced a predetermined amount from the rotation axis of the second gear 43 on the second rear surface 43A. The second rear cam 43 </ b> C performs a circular motion around the rotation axis of the second gear 43 in the rear view as the second gear 43 rotates. Further, the second rear cam 43C is configured to move the outer moving portion 54 of the striking mechanism 5 upward in accordance with the rotation of the second gear 43, that is, the circular motion. The second rear cam 43C is an example of a first cam portion.

  The second front cam 43D is a roller cam, and is provided so as to protrude forward from a position separated from the rotational axis of the second gear 43 by a predetermined amount on the second front surface 43B. The second front cam 43 </ b> D performs a circular motion around the rotation axis of the second gear 43 in front view as the second gear 43 rotates. Further, the second front cam 43D is configured to move the inner moving portion 52 of the striking mechanism 5 downward along with the rotation of the second gear 43, that is, the circular motion. The second front cam 43D is an example of a second cam portion.

  As shown in FIGS. 2 and 5 to 10, the striking mechanism 5 includes a holder portion 51, an inner moving portion 52, an inner spring 53, an outer moving portion 54, and a spring portion 55. . 5 and 6 are diagrams in which the drive mechanism 4 is omitted from FIGS. 3 and 4, FIG. 5 is a rear perspective view showing the striking mechanism 5, and FIG. 6 is a front perspective view showing the striking mechanism 5. . 7 is a cross-sectional view taken along the line VII-VII in FIG. 1 showing the striking mechanism 5, and FIG. 8 is a cross-sectional view taken along the line VIII-VIII in FIG. 1 showing the driving mechanism 4 and the striking mechanism 5. 9 and 10 are cross-sectional views taken along the line IX-IX of FIG. 7 showing the striking mechanism 5. FIG. 9 shows that the outer moving part 54 is located at the bottom dead center and the inner moving part 52 is located at the top dead center. FIG. 10 shows a state in which the outer moving part 54 is located at the top dead center and the inner moving part 52 is located at the bottom dead center.

  The holder part 51 is accommodated in the mechanism accommodating part 24 and supports the inner moving part 52 and the outer moving part 54 so as to be slidable in the vertical direction, and includes a top holder 511, a bottom holder 512, and a guide bar part 513. And an inner guide 514.

  As shown in FIGS. 2 and 5 to 7, the top holder 511 includes a main body 511A, a right rib 511B, a left rib 511C, a front rib 511D, a rear right rib 511E, and a rear left rib 511F. The main body portion 511 </ b> A has a substantially rectangular parallelepiped shape extending in the left-right direction, and its upper surface is in contact with the lower end of a rib extending downward from the inner wall of the upper part of the mechanism housing portion 24. As shown in FIG. 5 to FIG. 7, the right rib 511B and the left rib 511C are ribs extending downward from the right end and the left end of the bottom surface of the main body 511A, respectively, and are long in the front-rear direction. The length is substantially the same as the length of the main body portion 511A in the front-rear direction.

  2 and 6, the front rib 511D is a rib that extends downward from the front end of the bottom surface of the main body 511A, and includes a front end of the right rib 511B and a front end of the left rib 511C. Is connected. As shown in FIG. 5, the rear right rib 511E is a rib extending downward from the rear end portion of the bottom surface of the main body portion 511A, and has a predetermined length in the left direction from the rear end portion of the right rib 511B. It extends. The rear left rib 511F is a rib extending downward from the rear end portion of the bottom surface of the main body 511A, and extends from the rear end portion of the left rib 511C to the right by a predetermined length. Further, a space in which no rib is formed is defined between the left end surface of the rear right rib 511E and the right end surface of the rear left rib 511F.

  As shown in FIGS. 2 and 7, the bottom holder 512 is located below the top holder 511 and at the lower end of the mechanism accommodating portion 24, and includes a base portion 512A, a starboard portion 512B, and a port portion 512C. A right bumper 512D, a left bumper 512E, a right connecting portion 512F, and a left connecting portion 512G.

  The base portion 512 </ b> A has a substantially rectangular parallelepiped shape extending in the left-right direction, and a substantially central portion of the upper surface in the left-right direction is in contact with the lower end of the inner spring 53. As shown in FIG. 7, the starboard portion 512B has a substantially rectangular parallelepiped shape extending in the left-right direction, and the left portion thereof is integrally connected to the right portion of the base portion 512A by the right connecting portion 512F. The port portion 512C has a substantially rectangular parallelepiped shape extending in the left-right direction, and the right portion thereof is integrally connected to the left portion of the base portion 512A by the left connection portion 512G.

  The right bumper 512D and the left bumper 512E are cushioning materials that absorb shocks when the outer moving portion 54 accelerates from the top dead center and reaches the bottom dead center. The upper bumper portion 512B and the left bumper portion 512C, respectively. Is provided on the upper surface of the. The right bumper 512D and the left bumper 512E can suppress the recoil when the nail is driven.

  As shown in FIGS. 5 and 6, the guide bar portion 513 is a portion that guides the sliding of the outer moving portion 54 in the vertical direction, and has four flat bars extending in the vertical direction, that is, the front right side. A bar 513A, a left front bar 513B, a right rear bar 513C, and a left rear bar 513D are provided.

  The upper end portion of the right front bar 513A is fixed to the right portion of the front surface of the main body portion 511A of the top holder 511 with a screw, and the lower end portion is fixed to the front surface of the right collar portion 512B of the bottom holder 512 with screws. An upper end portion of the left front bar 513B is fixed to the left portion of the front surface of the main body portion 511A with a screw, and a lower end portion is fixed to the front surface of the left flange portion 512C of the bottom holder 512 with a screw. The upper end portion of the right rear bar 513C is fixed to the right portion of the rear surface of the main body portion 511A with a screw, and the lower end portion is fixed to the rear surface of the starboard portion 512B with screws. An upper end portion of the left rear bar 513D is fixed to the left portion of the rear surface of the main body portion 511A with a screw, and a lower end portion is fixed to the rear surface of the left port portion 512C with screws.

  As shown in FIGS. 2 and 5 to 10, the inner guide 514 is a member having a substantially circular tube shape extending in the vertical direction, and supports the inner moving portion 52 so as to be slidable in the vertical direction. Yes. The upper end of the inner guide 514 is in contact with the bottom surface of the main body 511A of the top holder 511 (FIG. 7), and the front end of the upper end is in contact with the rear surface of the front rib 511D (FIG. 2). The lower end of the inner guide 514 is in contact with the upper surface of the base portion 512 </ b> A of the bottom holder 512. Further, a part of the peripheral surface of the lower end portion of the inner guide 514 is in contact with the starboard portion 512B, the starboard portion 512C, the right connecting portion 512F, and the left connecting portion 512G of the bottom holder 512.

  As shown in FIG. 5, a long hole 514a extending in the vertical direction is formed in the rear portion of the inner guide 514. The long hole 514a allows the movement of the arm connecting portion 52D of the inner arm portion 52B described later in the vertical direction, and the length in the vertical direction is substantially the same as the slidable distance of the inner moving portion 52. Further, as shown in FIGS. 7 to 10, an inner bumper 514 </ b> A having a substantially ring shape in a top view is accommodated in the inner upper end portion of the inner guide 514. The inner bumper 514A is a cushioning material for absorbing an impact when the inner moving part 52 accelerates from below and moves upward.

  As shown in FIG. 5 and FIG. 7 to FIG. 10, the inner moving part 52 is a member that functions as a so-called counter balancer (counter weight) that suppresses the recoil when the nail is driven. A molded inner moving portion main body 52A, an inner arm portion 52B, a right claw portion 52E, and a left claw portion 52F are provided. The inner moving portion main body 52A is a substantially cylindrical member extending in the vertical direction, and is supported inside the inner guide 514 so as to be slidable in the vertical direction. The inner arm portion 52B has an arm main body 52C and an arm connection portion 52D. The inner moving part 52 is an example of a weight part.

  As shown in FIGS. 5 and 8, the arm main body 52C is a flat plate-like member that is located behind the inner moving portion main body 52A and extends in the left-right direction in the rear view, and is an arm connecting portion 52D. Are fixed and connected to the rear part of the inner moving part main body 52A with screws. The arm main body 52C is located in front of the first gear 42 and the second gear 43, and faces the first gear 42 and the second gear 43 in a top view.

  The right claw portion 52E protrudes rearward from the right portion of the upper end of the rear surface of the arm main body 52C and is formed to extend in the left-right direction. The left claw portion 52F protrudes rearward from the left portion of the lower end of the rear surface of the arm main body 52C and is formed to extend in the left-right direction. 2 and 8, the rear ends of the right claw portion 52E and the left claw portion 52F are from the front ends of the first front cam 42D of the first gear 42 and the second front cam 43D of the second gear 43, respectively. The upper surface of the right claw portion 52E can contact the second front cam 43D, and the upper surface of the left claw portion 52F can contact the first front cam 42D.

  As shown in FIG. 7, the inner spring 53 is a compression coil spring and is accommodated in the inner guide 514, the upper end of which is in contact with the bottom surface of the inner moving portion main body 52 </ b> A, and the lower end thereof is the bottom holder 512. Is in contact with the upper surface of the base portion 512A. The inner spring 53 is compressed by moving the inner moving portion 52 downward from the state of FIGS. 7 and 9, and elastic energy is accumulated in the inner spring 53 by the compression. Further, when the stored elastic energy is released, the inner spring 53 urges the inner moving portion 52 upward and accelerates it. The inner spring 53 is an example of a second urging portion.

  As shown in FIGS. 2, 5, and 6, the outer moving portion 54 is supported by the holder portion 51 so as to be slidable in the vertical direction, and accelerates from the top dead center to move to the bottom dead center. It is configured to hit the nail. The outer moving part 54 includes an outer moving part main body 54A and a rod 54B. The outer moving unit 54 is an example of a hitting unit.

  As shown in FIGS. 11A and 11B, the outer moving portion main body 54A includes a rod holding portion 541, a right arm portion 542, a lower claw portion 542C, a left arm portion 543, and an upper claw portion. 543C and a bottom 544. A part of the outer moving portion main body 54A defines an inner space 54a. 11A is a rear perspective view showing the outer moving part main body 54A, and FIG. 11B is a front side perspective view showing the outer moving part main body 54A.

  The rod holding portion 541 has a holding portion main body 541A and a rod connecting portion 541B. The holding portion main body 541A has a substantially flat plate shape extending in the left-right direction when viewed from the front. As shown in FIG. 8, the holding portion main body 541A is positioned in front of the inner moving portion 52 and between the right front bar 513A and the left front bar 513B in the front-rear direction, and the front surface of the rod holding portion 541 is the right front bar. 513A and the left front bar 513B are opposed, and the rear surface is opposed to the inner guide 514. The rod connecting portion 541B is provided so as to protrude forward and extend downward from a substantially central lower portion in the left-right direction of the front surface of the holding portion main body 541A.

  As shown in FIGS. 11A and 11B, the right arm portion 542 includes a right extension portion 542A and a right rear plate portion 542B. The right extension portion 542A extends rearward from the right end portion of the rod holding portion 541 integrally with the rod holding portion 541. As shown in FIGS. 3 and 8, the right extending portion 542A is located to the right of the first gear 42, the second gear 43, and the inner moving portion 52.

  The right rear plate portion 542B extends to the left (the direction toward the left extension portion 543A) from the rear end portion of the right extension portion 542A. The right rear plate portion 542B is located behind the first gear 42, the second gear 43, and the inner moving portion 52, and the front surface of the right rear plate portion 542B is the first rear surface of the first gear 42 in a top view. 42A and the second rear surface 43A of the second gear 43 are opposed to each other.

  The lower claw portion 542C extends in the left-right direction and protrudes forward from the lower left portion of the front surface of the right rear plate portion 542B. In other words, the lower claw portion 542C protrudes toward the first rear surface 42A or the second rear surface 43A in a top view. The front end of the lower claw portion 542C is located in front of the rear end of the first rear cam 42C and the second gear 43 of the first gear 42, and the lower surface of the lower claw portion 542C is in contact with the first rear cam 42C. It is configured to be possible. The lower claw portion 542C in the nailing machine 1 is an example of a claw portion.

  As shown in FIGS. 11A and 11B, the left arm portion 543 includes a left extending portion 543A and a left rear plate portion 543B. The left extending portion 543A extends rearward from the left end portion of the rod holding portion 541 integrally with the rod holding portion 541. As shown in FIGS. 3 and 8, the left extension 543 </ b> A is located to the left of the first gear 42, the second gear 43, and the inner moving part 52.

  The left rear plate portion 543B extends rightward (direction toward the right extension portion 542A) from the rear end portion of the left extension portion 543A. The left rear plate portion 543B is located behind the first gear 42, the second gear 43, and the inner moving portion 52, and the front surface of the left rear plate portion 543B is the first rear surface of the first gear 42 in a top view. 42A and the second rear surface 43A of the second gear 43 are opposed to each other.

  The upper claw portion 543C extends in the left-right direction and protrudes forward from the right portion of the upper end of the front surface of the left rear plate portion 543B. In other words, the upper claw portion 543C protrudes toward the first rear surface 42A or the second rear surface 43A in a top view. The front end of the upper claw portion 543C is located in front of the first rear cam 42C and the rear end of the second gear 43 of the first gear 42, and the lower surface of the upper claw portion 543C is in contact with the second rear cam 43C. It is configured to be possible. The upper claw portion 543C in the nailing machine 1 is an example of a claw portion.

  As shown in FIGS. 11A and 11B, the bottom portion 544 has a flat plate shape extending in the left-right direction in a bottom view, and is formed between the lower end edge of the holding portion main body 541A and the front portion of the right extension portion 542A. The lower end edge is connected to the lower end edge of the front portion of the left extension portion 543A. As shown in FIGS. 7 and 8, the upper surface of the bottom portion 544 abuts on the spring portion 55, and a hole 544a is formed at the approximate center of the upper surface in the left-right direction. The hole 544a allows the inner guide 514 to be inserted in the vertical direction. The bottom surface of the bottom portion 544 is configured to be able to contact the right bumper 512D and the left bumper 512E when the outer moving portion 54 moves from the top dead center to the bottom dead center.

  As shown in FIG. 8, the inner space 54a includes the rear surface of the holding portion main body 541A, the left surface of the right extending portion 542A, the front surface of the right rear plate portion 542B, the right surface of the left extending portion 543A, and the left rear plate portion 543B. And is defined by the front of the. The inner space 54a accommodates the first gear 42, the second gear 43, and the inner moving part 52 in a top view. In other words, the first gear 42, the second gear 43, and the inner moving part 52 are in a top view. It arrange | positions inside the inner side space 54a. The holding portion main body 541A, the right extension portion 542A, the right rear plate portion 542B, the left extension portion 543A, and the left rear plate portion 543B are examples of wall portions.

  As shown in FIG. 2, the rod 54B is a rod-like member extending in the vertical direction, and is configured to be movable from the top dead center to the bottom dead center integrally with the outer moving portion main body 54A. The upper end portion of the rod 54B is connected to the rod connection portion 541B of the outer moving portion 54. The lower end of the rod 54 </ b> B is configured to be slidable in the vertical direction inside an injection hole 6 a described later of the nose portion 6. Further, the lower end of the rod 54B is positioned at an upper portion in an injection hole 6a described later of the nose portion 6 when the outer moving portion 54 is positioned at the top dead center, and the outer moving portion 54 is positioned at the bottom dead center. If it is, it is configured to be positioned at the substantially lower end of the injection hole 6a.

  As shown in FIGS. 5 to 8, the spring portion 55 includes a right spring 55A and a left spring 55B. The right spring 55 </ b> A and the left spring 55 </ b> B are compression coil springs and are accommodated in the holder portion 51. As shown in FIG. 7, the right spring 55 </ b> A is disposed on the right side of the inner spring 53, the upper end of which is in contact with the bottom surface of the main body 511 </ b> A, and the lower end thereof is the upper surface of the bottom 544 of the outer moving unit 54. It is in contact with the right part of. The left spring 55 </ b> B is disposed on the left side of the inner spring 53, and the upper end thereof is in contact with the bottom surface of the main body portion 511 </ b> A, and the lower end thereof is in contact with the left portion of the upper surface of the bottom portion 544. The spring part 55 in the nailing machine 1 is an example of a first urging part. The right spring 55A is an example of a first elastic part or a second elastic part, and the left spring 55B is an example of a first elastic part or a second elastic part.

  Further, as shown in FIG. 8, an inner spring 53 is provided between the right spring 55A and the left spring 55B in a top view. Specifically, the inner spring 53 is provided on an imaginary line segment L connecting the right spring 55A and the left spring 55B in a top view. Note that the point A1 indicates the center of the right spring 55A in the top view, the point A2 indicates the center of the left spring 55B in the top view, and a virtual line segment L represented by a broken line is a virtual line connecting the points A1 and A2. It is a line segment.

  By moving the outer moving portion 54 upward from the state of FIGS. 7 and 9, the right spring 55A and the left spring 55B are compressed, and elastic energy is accumulated in the right spring 55A and the left spring 55B, respectively, due to the compression. In addition, when the stored elastic energy is released, the right spring 55A and the left spring 55B urge the outer moving portion 54 downward and accelerate it.

  The first micro switch 24 </ b> A is a switch that is turned on when the outer moving portion 54 reaches the top dead center, and is provided in the upper portion inside the mechanism housing portion 24. The first micro switch 24A is configured to be turned off when the outer moving portion 54 starts moving from the top dead center to the bottom dead center and moves slightly downward from the top dead center. When the on state is changed to the off state, a signal is output to the control board 23A. When receiving the signal, the control board 23A stops the driving of the motor 3.

  As shown in FIGS. 1 and 2, the nose portion 6 is provided so as to extend downward from the front surface of the bottom holder 512, and an injection hole 6 a is formed therein. The injection hole 6a extends in the vertical direction, and supports the rod 54B so as to be slidable.

  The magazine 7 is provided so as to extend rearward from the rear portion of the nose portion 6, and is configured to supply nails accommodated in the magazine 7 to the nose portion 6. Further, the magazine 7 includes a second micro switch 7A configured to be able to detect the remaining amount of nails. The second micro switch 7A outputs a signal to the control board 23A when the remaining amount of the nail becomes less than a predetermined amount.

  Next, the operation of the nailing machine 1 will be described. The outer moving part 54 is located at the bottom dead center in the initial state, and is in contact with the right bumper 512D and the left bumper 512E (states of FIGS. 1, 7, and 9). The inner moving unit 52 is located at the top dead center in the initial state and is in contact with the inner bumper 514A (the state shown in FIGS. 1, 7, and 9).

  In the initial state, when the user holds the handle portion 21 and holds the nail driver 1 so as to be substantially orthogonal to the upper surface of the material to be driven, and pushes the trigger 21A upward, the motor 3 starts driving. . When the motor 3 starts driving, the rotary shaft 3A is rotationally driven, and the rotation of the rotary shaft 3A is transmitted to the drive mechanism 4 via the speed reduction mechanism 31. The drive mechanism 4 to which the rotation is transmitted moves the outer moving portion 54 upward while resisting the biasing force of the right spring 55A and the left spring 55B, and moves the inner moving portion 52 downward while resisting the biasing force of the inner spring 53. Move.

  When the outer moving portion 54 moves upward, the right spring 55A and the left spring 55B are compressed upward, and elastic energy is accumulated in the right spring 55A and the left spring 55B. When the inner moving portion 52 moves downward, the inner spring 53 is compressed downward, and elastic energy is accumulated in the inner spring 53.

  The drive mechanism 4 moves the outer moving unit 54 to the top dead center and the inner moving unit 52 to the bottom dead center (the state shown in FIGS. 2 and 10). When the outer moving unit 54 reaches top dead center, the first micro switch 24A is turned on. Thereafter, the drive mechanism 4 releases the elastic energy accumulated in each spring. When the elastic energy is released, the outer moving part 54 is urged by the right spring 55A and the left spring 55B and accelerates downward, that is, in the striking direction, and the inner moving part 52 is urged by the inner spring 53 and moves upward, that is, counteracts. Accelerate in the direction of hitting. At this time, the first micro switch 24A is changed from the on state to the off state by the downward movement of the outer moving portion 54, and the first micro switch 24A outputs a signal for stopping the motor 3 to the control board 23A. The control board 23A that has received the signal stops the motor 3.

  The outer moving portion 54 accelerated downward strikes the nail with the rod 54B, contacts the right bumper 512D and the left bumper 512E, and returns to the initial state shown in FIGS. 1, 7 and 9, that is, the bottom dead center. Simultaneously with this operation, the inner moving part 52 moves in the counter-blowing direction, which is opposite to the striking direction of the outer moving part 54, and comes into contact with the inner bumper 514 </ b> A as shown in FIGS. 1, 7, and 9. Return to the initial state, that is, top dead center.

  In this way, the movement from the bottom dead center to the top dead center of the outer moving portion 54 and the movement from the top dead center to the bottom dead center of the inner moving portion 52 are simultaneously performed by the drive mechanism 4, and the right spring 55A, The elastic energy accumulated in each of the spring 55B and the inner spring 53 is released substantially simultaneously, and the outer moving part 54 and the inner moving part 52 are accelerated downward (striking direction) and upward (counter striking direction), respectively, substantially simultaneously. Thus, the outer moving portion 54 instantaneously moves from the top dead center to the bottom dead center and strikes the nail supplied to the nose portion 6, and the inner moving portion 52 instantaneously moves from the bottom dead center to the top dead center. The driving operation is performed by the above operation.

  Here, with reference to FIG.12 and FIG.13, operation | movement of the drive mechanism 4, the outer side movement part 54, and the inner side movement part 52 in driving | operation | movement is demonstrated in detail. FIG. 12 is a cross-sectional view taken along the line XII-XII in FIG. 8 and shows the operations of the drive mechanism 4 and the outer moving unit 54 in time series. 12A shows a state at time t0 (initial state), FIG. 12B shows a state at time t1, FIG. 12C shows a time t2, FIG. 12D shows a time t3, and FIG. 12E shows a state at time t4. FIG. 13 is a cross-sectional view taken along the line XIII-XIII of FIG. 8 and shows the operations of the drive mechanism 4 and the inner moving unit 52 in time series. 12A shows a state at time t0 (initial state), FIG. 12B shows a state at time t1, FIG. 12C shows a time t2, FIG. 12D shows a time t3, and FIG. 12E shows a state at time t4. 12 and 13, the rotation direction R <b> 1 indicates the rotation direction of the first gear 42, and the rotation direction R <b> 2 indicates the rotation direction of the second gear 43. Note that the state of FIG. 8 described above corresponds to the states of FIG. 12B and FIG. 13B.

  First, operations of the drive mechanism 4 and the outer moving unit 54 will be described. As shown in FIG. 12 (a), in the initial state (time t0), the first rear cam 42C is at the lowest position in the left and right direction on the movement trajectory of the first rear cam 42C accompanying the rotation of the first gear 42. Located in the approximate center. In the initial state, the second rear cam 43C is located on the right side and slightly below the uppermost position on the movement locus of the second rear cam 43C accompanying the rotation of the second gear 43. Further, the lower pawl portion 542C of the outer moving portion 54 is positioned slightly upward on the right side of the first rear cam 42C. The movement locus of the first rear cam 42C draws a circle centered on the rotation axis of the first gear 42 in the rear view, and the movement locus of the second rear cam 43C has the rotation axis of the second gear 43 in the rear view. Draw a circle centered on. In addition, it is a state in which the outer side movement part 54 is located in a bottom dead center, and the state of Fig.12 (a) respond | corresponds to the state of FIG.1, FIG7 and FIG.9.

  When the rotational force of the rotating shaft 3A of the motor 3 is transmitted to the drive mechanism 4 at time t0, the first gear 42 starts to rotate in the rotational direction R1, and the second gear 43 rotates in the rotational direction R2. To start. After the rotation of the first gear 42 and the second gear 43 is started at time t0, the first rear cam 42C and the second rear cam 43C are in the state shown in FIG. The 1 rear cam 42C comes into contact with the lower surface of the lower claw portion 542C of the outer moving portion 54.

  After time t1, the first rear cam 42C moves while pressing the lower surface of the lower claw portion 542C upward until time t2 as the first gear 42 rotates, and moves the outer moving portion 54 to the right spring 55A and the left spring 55B. Move upward while resisting the urging force. That is, during the period from time t1 to time t2, the first gear 42 moves the outer moving portion 54 upward while receiving a downward force. Further, the right spring 55A and the left spring 55B are compressed by the movement, and elastic energy is accumulated in the right spring 55A and the left spring 55B. At time t2, the first rear cam 42C and the second rear cam 43C are in the state shown in FIG. 12C, and the second rear cam 43C contacts the lower surface of the upper claw portion 543C of the outer moving portion 54. At this time, the first rear cam 42C is still in contact with the lower claw portion 542C.

  Immediately after the second rear cam 43C contacts the lower surface of the upper claw 543C at time t2, the contact between the first rear cam 42C and the lower claw 542C is released. As the second gear 43 rotates, the second rear cam 43C moves while pressing the lower surface of the upper claw portion 543C upward from time t2 to time t3, and moves the outer moving portion 54 with the right spring 55A and the left spring 55B. Move upward while resisting power. That is, during the period from time t2 to time t3, the second gear 43 moves the outer moving portion 54 upward while receiving a downward force. Further, the right spring 55A and the left spring 55B are compressed by the movement, and elastic energy is accumulated in the right spring 55A and the left spring 55B. At time t3, the first rear cam 42C and the second rear cam 43C are in the state shown in FIG. At this time, the second rear cam 43C is still in contact with the upper claw portion 543C. The state shown in FIG. 12D is a state in which the outer moving portion 54 is located at the top dead center, and corresponds to the states in FIGS.

  Immediately after time t3, the contact between the second rear cam 43C and the upper claw portion 543C is released, and the state shown in FIG. By releasing the contact, the elastic energy accumulated in each of the right spring 55A and the left spring 55B is released, and the outer moving portion 54 moves while accelerating from the top dead center to the bottom dead center, and strikes the nail.

  Next, operations of the drive mechanism 4 and the inner moving unit 52 will be described. As shown in FIG. 13A, in the initial state (time t0), the first front cam 42D is at the lowest position on the movement trajectory of the first front cam 42D as the first gear 42 rotates. Located right and slightly above. In the initial state, the second front cam 43 </ b> D is located at the uppermost position and substantially at the center in the left-right direction on the movement trajectory of the second front cam 43 </ b> D accompanying the rotation of the second gear 43. Further, the right claw portion 52E of the inner moving portion 52 is positioned slightly below on the right side of the second front cam 43D. The movement locus of the first front cam 42D draws a circle centered on the rotation axis of the first gear 42 in the front view, and the movement locus of the second front cam 43D is the rotation axis of the second gear 43 in the front view. Draw a circle centered on. In addition, the state of Fig.13 (a) is a state in which the inner side movement part 52 is located in a top dead center, and respond | corresponds to the state of FIG.1, FIG7 and FIG.9.

  When the rotational force of the rotating shaft 3A of the motor 3 is transmitted to the drive mechanism 4 at time t0, the first gear 42 starts to rotate in the rotational direction R1, and the second gear 43 rotates in the rotational direction R2. To start. After the rotation of the first gear 42 and the second gear 43 is started at time t0, the first front cam 42D and the second front cam 43D are in the state shown in FIG. 2 The front cam 43D is in contact with the upper surface of the right claw 52E of the inner moving part 52. The contact between the second front cam 43D and the right claw 52E is substantially the same as the contact between the first rear cam 42C and the lower claw 542C.

  After time t1, the second front cam 43D moves while pressing the upper surface of the right claw 52E downward until time t2 as the second gear 43 rotates, and uses the inner moving portion 52 as the biasing force of the inner spring 53. Move down while resisting. That is, during the period from time t1 to time t2, the second gear 43 moves the inner moving portion 52 downward while receiving an upward force. Further, the inner spring 53 is compressed by the movement, and elastic energy is accumulated in the inner spring 53. At time t2, the first front cam 42D and the second front cam 43D are in the state shown in FIG. 13C, and the first front cam 42D comes into contact with the upper surface of the left claw portion 52F of the inner moving portion 52. The contact between the first front cam 42D and the left claw 52F is substantially simultaneous with the contact between the second rear cam 43C and the upper claw 543C. At this time, the second front cam 43D is still in contact with the right claw 52E.

  Immediately after the first front cam 42D contacts the upper surface of the left claw 52F at time t2, the contact between the second front cam 43D and the right claw 52E is released. The first front cam 42 </ b> D moves while pressing the upper surface of the left claw 52 </ b> F downward from time t <b> 2 to time t <b> 3 as the first gear 42 rotates, and resists the urging force of the inner spring 53. While moving down. That is, during the period from time t2 to time t3, the first gear 42 moves the inner moving portion 52 downward while receiving an upward force. Further, the inner spring 53 is compressed by the movement, and elastic energy is accumulated in the inner spring 53. At time t3, the first front cam 42D and the second front cam 43D are in the state shown in FIG. At this time, the first front cam 42D is still in contact with the left claw portion 52F. The state shown in FIG. 13D is a state where the inner moving part 52 is located at the bottom dead center, and corresponds to the states shown in FIGS.

  Immediately after time t3, the contact between the first front cam 42D and the left claw 52F is released, and the state shown in FIG. 13E is reached at time t4. The release of the contact releases the elastic energy accumulated in the inner spring 53, and the inner moving portion 52 moves while accelerating from the bottom dead center to the top dead center. The release of the contact between the first front cam 42D and the left claw portion 52F is substantially simultaneous with the release of the contact between the second rear cam 43C and the upper claw portion 543C, and is lifted from the bottom dead center of the inner moving portion 52. The movement to the dead point and the movement from the top dead center to the bottom dead center of the outer moving unit 54 are performed substantially simultaneously. For this reason, the reaction generated in the nailing machine 1 due to the movement of the outer moving portion 54 can be canceled by the movement of the inner moving portion 52.

  At time t4, the first micro switch 24A outputs a signal for causing the control board 23A to stop the motor 3. The control board 23A that has received the signal stops the motor 3, and the drive mechanism 4 returns to the state shown in FIGS. 12 (a) and 13 (a).

  Thus, according to the nail driver 1 according to the first embodiment of the present invention, the outer movement in which the reciprocating motion is provided in the housing 2 so as to reciprocate in the up-and-down direction and moves in the striking direction (downward) and strikes the nail. Portion 54, a spring portion 55 for accelerating the outer moving portion 54 in the striking direction, and a reciprocal striking direction (upward direction) when the outer moving portion 54 is moved in the striking direction. The elastic energy is accumulated by the movement of the inner moving part 52 in the striking direction and the inner moving part 52 in the striking direction, and the inner moving part 52 is accelerated in the counter striking direction by releasing the accumulated elastic energy. Since the inner spring 53 and the drive mechanism 4 for releasing the stored elastic energy after the elastic energy is stored in the spring portion 55 and the inner spring 53 are provided, It can be the reaction and suppress vibration. Thereby, the operativity of a driving machine can be made favorable and the finishing degree of work can be made favorable.

  Further, in the nail driver 1, the first gear 42 includes a first rear cam 42C for driving the outer moving portion 54 that moves the outer moving portion 54 in the counter-blowing direction while resisting the urging force of the spring portion 55, and an inner spring. Since the first front cam 42D for driving the inner moving portion 52 that moves the inner moving portion 52 in the striking direction while resisting the urging force of the inner moving portion 52 is provided, each of the spring portion 55 and the inner spring 53 has elastic energy. During the driving operation, opposite forces are applied to the first gear 42 during the driving operation. For example, the first gear 42 receives a downward force from time t1 to time t2 in FIG. 12, and receives an upward force from time t2 to time t3. For this reason, the first support shaft 41B supporting the first gear 42 and the first gear 42 bears the load compared to the case where only the upward force or only the downward force is applied to the first gear 42 intermittently. The load can be made substantially uniform in the vertical direction (reciprocating direction). Thereby, the failure and breakage such as the first gear 42 and the first support shaft 41B tilting upward or downward can be suppressed, the failure of the nail driver 1 itself can be suppressed, and the nail driver 1 Can have a long life. The above effect is the same for the second gear 43.

  Further, in the nail driver 1, the first gear 42 has both the first rear cam 42C for driving the outer moving portion 54 and the first front cam 42D for driving the inner moving portion 52. In addition to the mechanism for moving 54 and accumulating elastic energy in the spring portion 55, it is not necessary to separately provide a mechanism for moving the inner moving portion 52 and accumulating elastic energy in the inner spring 53. For this reason, suppression of the recoil of the main body of the nailing machine 1 can be realized with a simple configuration and at a low cost. The above effect is the same for the second gear 43.

  Further, in the nailing machine 1, the first gear 42 has a first rear surface 42A and a first front surface 42B that is the surface opposite to the first rear surface 42A, and the first rear cam 42C is the first rear surface 42A. The first front cam 42D protrudes from the first front surface 42B, that is, a gear provided with cams on both sides, so that it is outside from the same surface (for example, only from the first rear surface 42A or only from the first front surface 42B). The first gear 42, the outer moving portion 54, and the inner movement are compared with the case where the two cams of the first rear cam 42C for driving the moving portion 54 and the first front cam 42D for driving the inner moving portion 52 protrude. The structure of the part 52 can be simplified, and the structure of the nail driver 1 itself can be simplified. The above effect is the same for the second gear 43.

  In addition, the spring portion 55 of the nail driver 1 is configured to be compressed in the anti-blow direction by the movement of the outer moving portion 54 in the anti-hitting direction, and to store elastic energy, and the inner spring 53 is configured to store the inner moving portion 52. Since the elastic energy is stored by being compressed in the striking direction by movement in the striking direction, that is, the compression direction of the spring portion 55 and the compression direction of the inner spring 53 are opposite to each other. The outer moving part 54 and the inner moving part 52 can be accelerated in opposite directions.

  In the nailing machine 1, the spring portion 55 includes a right spring 55A and a left spring 55B, and the inner spring 53 is connected to the right spring 55A and the left spring 55B when viewed from the reciprocating direction (vertical direction). Since it is provided in between, the moment generated in the nail driver 1 during driving can be suppressed. That is, it is possible to suppress moments around the virtual axis that are orthogonal to the striking direction and the direction from the right spring 55A toward the left spring 55B (left-right direction). For this reason, it can suppress that the nail driver 1 rotates centering | focusing on the said virtual axis | shaft in driving | operation, and can improve operativity.

  Further, the nailing machine 1 includes a holding portion main body 541A, a right extension portion 542A, a right rear plate portion 542B, a left extension portion 543A, and a left rear plate portion 543B that define an inner space 54a, and a first gear. 42 and the inner moving portion 52 are accommodated in the inner space 54a when viewed from the reciprocating direction, the first front surface 42B is located closer to the inner moving portion 52 than the first rear surface 42A, and the lower claw portion 542C is viewed from the reciprocating direction. And projecting in the direction from the right rear plate portion 542B toward the first rear surface 42A and abutting on the first rear surface cam 42C as the first gear 42 rotates to move the outer moving portion 54 in the anti-hitting direction. Therefore, the outer moving part 54 that hits the nail when viewed from the reciprocating direction is located outside the inner moving part 52 that is a counter balancer. For this reason, it is possible to hit the nail outside the inner moving portion 52, and by arranging the front end portion of the outer moving portion 54 at the front end portion of the nail driver 1, the front side of the mechanism housing portion 24 becomes an obstacle. Even in a place where the nail cannot be driven due to contact, the nail can be driven, so-called hitting is possible. Thereby, a stopper can be driven in against a wall etc. and workability | operativity can be improved. The above effect is the same for the second gear 43 and the upper claw portion 543C.

  Further, in the nailing machine 1, the positional relationship among the first rear cam 42C, the second rear cam 43C, the lower claw part 542C, and the upper claw part 543C in the rear view shown in FIGS. 12 (a) to 12 (e). FIG. 13 (a) to FIG. 13 (e) rotate the positional relationship among the first front cam 42D, the second front cam 43D, the right claw portion 52E, and the left claw portion 52F in the front view by 180 °. It becomes the composition. That is, the positional relationship shown in FIG. 12 and the positional relationship shown in FIG. 13 are the center of the line segment connecting the rotation axis of the first gear 42 and the rotation axis of the second gear 43. Symmetric about point. For this reason, the movement and acceleration (winding and launching) of the outer moving part 54 and the inner moving part 52 can be performed substantially simultaneously.

  Next, a nailing machine 200 according to a second embodiment of the present invention will be described with reference to FIGS. The basic configuration is the same as that of the nail driver 1 of the first embodiment. In the following description, the same members and elements as those of the nailing machine 1 according to the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIGS. 14 and 15, the nail driver 200 includes a holder part 251, a nose part 206, an inner moving part 252 and an outer moving part 254. FIG. 14 is a partial cross-sectional side view showing the internal structure of the entire nailing machine 200, showing a state where the outer moving part 254 is located at the top dead center and the inner moving part 252 is located at the bottom dead center. FIG. FIG. 15 is a partial sectional side view showing the striking mechanism 205 of the nailing machine 200, with the outer moving part 254 located at the top dead center and the inner moving part 252 located at the bottom dead center. FIG.

  As shown in FIGS. 14 and 15, the holder portion 251 is housed inside the mechanism housing portion 24 and supports the inner moving portion 252 and the outer moving portion 254 so as to be slidable in the vertical direction. 212 is provided. As shown in FIG. 14, the bottom holder 212 is provided at the lower part of the holder portion 251 and has a horizontal portion 212A and a vertical portion 212B.

  As shown in FIG. 15, the horizontal portion 212A is a rectangular portion extending in the left-right direction when viewed from the bottom, and an inner bumper 214A having a ring shape when viewed from the top is provided on the top surface. Further, an insertion hole 212a penetrating in the vertical direction is formed in the horizontal portion 212A, and insertion of a rod 252B described later is allowed. The vertical portion 212B is a portion that extends downward from the rear end portion of the horizontal portion 212A and extends in the left-right direction when viewed from the front.

  As shown in FIG. 14, the nose portion 206 is provided so as to extend downward from the front surface of the vertical portion 212B, and an injection hole 206a is formed therein. The injection hole 206a is a hole extending in the vertical direction, and supports the rod 252B so as to be slidable.

  The inner moving part 252 is provided to be slidable in the vertical direction inside the inner guide 514 and includes an inner moving part main body 252A and a rod 252B. The inner moving portion main body 252A has a substantially cylindrical shape, and the outer peripheral surface thereof is in sliding contact with the inner peripheral surface of the inner guide 514. Further, an inner spring 253 is provided between the upper surface of the inner moving portion main body 252A and the lower surface of the top holder 511. The inner spring 253 is compressed by moving upward of the inner moving portion 252, and elastic energy is accumulated in the inner spring 253. By releasing the accumulated elastic energy, the inner moving part 252 is urged downward and accelerated. Further, a left claw portion 252F extending in the left-right direction protrudes rearward from the left upper portion of the arm main body 52C of the inner moving portion 252, and is not shown in the drawing extending substantially in the center in the vertical direction and in the left-right direction from the right portion. The right nail part protrudes backward. The inner moving part 252 is an example of a striking part, and the inner spring 253 is an example of a first biasing part.

  The rod 252B is a rod-like member extending downward from the lower surface of the inner moving portion main body 252A, and hits the nail supplied to the magazine 7 when the inner moving portion main body 252A moves from the top dead center to the bottom dead center. It is configured. Further, the lower end of the rod 252B is located at the upper part inside the injection hole 206a of the nose part 206 when the inner moving part 252 is located at the top dead center, and the inner moving part 252 is located at the bottom dead center. In this case, it is configured to be positioned at the substantially lower end of the injection hole 206a.

  The outer side moving part 254 is a member that plays a role as a so-called counter balancer (counter weight) that suppresses the recoil when the nail is driven, and is formed of a metal material. A lower claw 243C extending in the left-right direction protrudes forward from the lower right portion of the front surface of the left rear plate 543B of the outer moving portion 254, and from the left upper portion of the right rear plate 542B in the left-right direction. An unillustrated upper claw portion protrudes forward. Further, a spring portion 55 is provided between the outer moving portion 254 and the bottom holder 212, and the spring portion 55 is compressed by the downward movement of the outer moving portion 254 to accumulate elastic energy. The outer moving part 254 is an example of a weight part, and the spring part 55 in the nail driver 200 is an example of a second urging part. The lower nail part 243C and the upper nail part are examples of the nail part.

  Next, the operation of the nailing machine 200 will be described. The outer moving unit 254 is in a state located at the top dead center in the initial state. The inner moving part 252 is in a state of being located at the bottom dead center in the initial state. In the initial state, when the motor 3 starts driving, the rotary shaft 3A is rotationally driven, and the rotation of the rotary shaft 3A is transmitted to the drive mechanism 4 via the speed reduction mechanism 31. The drive mechanism 4 to which the rotation is transmitted moves the outer moving portion 254 downward while resisting the biasing force of the spring portion 55 and moves the inner moving portion 252 upward while resisting the biasing force of the inner spring 253.

  When the outer moving portion 254 moves downward, the spring portion 55 is compressed downward, and elastic energy is accumulated in the spring portion 55. When the inner moving part 252 moves upward, the inner spring 253 is compressed upward, and elastic energy is accumulated in the inner spring 253.

  The drive mechanism 4 moves the outer moving unit 254 to the bottom dead center and the inner moving unit 252 to the top dead center. Thereafter, the drive mechanism 4 releases the elastic energy accumulated in each spring. When the elastic energy is released, the outer moving part 254 is urged by the spring part 55 to accelerate upward, that is, in the counter-blowing direction, and the inner moving part 252 is urged by the inner spring 253 and accelerates in the downward direction, that is, the striking direction. To do.

  The inner moving portion 252 accelerated downward strikes the nail with the rod 252B, contacts the inner bumper 214A, and returns to the initial state shown in FIGS. 14 and 15, that is, the bottom dead center. Simultaneously with this operation, the outer moving unit 254 moves in the counter-blowing direction, which is the direction opposite to the striking direction of the inner moving unit 252, and returns to the initial state, that is, top dead center.

  In this way, the movement from the bottom dead center to the top dead center of the inner moving unit 252 and the movement from the top dead center to the bottom dead center of the outer moving unit 254 are simultaneously performed by the drive mechanism 4, and the right spring 55 </ b> A, The elastic energy accumulated in the respective springs of the spring 55B and the inner spring 253 is released substantially at the same time, and the inner moving part 252 and the outer moving part 254 are accelerated substantially downward (striking direction) and upward (counter striking direction), respectively. Thus, the inner moving part 252 instantaneously moves from the top dead center to the bottom dead center and strikes the nail supplied to the nose part 206, and the outer moving part 254 moves instantaneously from the bottom dead center to the top dead center. The driving operation is performed by the above operation.

  The contact and positional relationship between the first front cam 42D and the second front cam 43D of the drive mechanism 4 and the left claw 252F of the inner moving unit 252 and the right claw (not shown) in the driving operation of the nailing machine 200 are as follows. This is the same as the relationship shown in FIG. Further, the contact and positional relationship between the first rear cam 42C and the second rear cam 43C of the driving mechanism 4 in the nailing machine 200 and the lower claw portion 243C of the outer moving portion 254 and the upper claw portion (not shown) are shown in FIG. This is the same as the relationship shown in.

  As described above, in the nailing machine 200 according to the second embodiment of the present invention, the first gear 42 and the inner moving portion 252 are accommodated in the inner space 54a when viewed from the reciprocating direction, and the counter is viewed from the reciprocating direction. The outer side moving part 254 which is a balancer is located outside the inner side moving part 252 hitting the nail. Thereby, the outer side moving part 254 becomes larger than the inner side moving part 252, and the reaction at the time of driving | operation which can make the mass of the outer side moving part 254 heavy can be suppressed more. Further, the degree of freedom in designing the mass and size of the outer moving unit 254 can be improved.

  Further, the same operations and effects as the nail driver 1 according to the first embodiment of the present invention are produced from the same configuration and elements of the nail driver 200 as the nail driver 1.

  Next, a nailing machine 300 according to a third embodiment of the present invention will be described with reference to FIG. The basic configuration is the same as that of the nail driver 1 of the first embodiment. In the following description, the same members and elements as those of the nailing machine 1 according to the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIG. 16, the nail driver 300 includes a gear holder 41 having a third support shaft 341D and a third gear 344. The third support shaft 341D is a shaft extending in the front-rear direction, and is provided so as to protrude forward from the gear holder 41 above the second support shaft 41C.

  The third gear 344 is a spur gear having a substantially circular shape when viewed from the front, and is supported by the third support shaft 341D so as to be rotatable about the axis of the third support shaft 341D. The third gear 344 meshes with the second gear 43 and is driven to rotate clockwise in front view by the rotation of the second gear 43. A third rear surface 344A is defined on the rear surface of the third gear 344, and a third front surface 344B is defined on the front surface opposite to the third rear surface 344A. The third gear 344 includes a third rear cam 344C and a third front cam (not shown). The third rear cam 344C protrudes rearward from the third rear surface 344A and is configured to come into contact with the outer moving portion 54, and moves the outer moving portion 54 upward as the third gear 344 rotates. It is configured. The third front cam is configured to protrude forward from the third front surface 344B and to come into contact with the inner moving portion 52, and to move the inner moving portion 52 downward as the third gear 344 rotates. It is configured. The third rear surface 344A is an example of a first surface, and the third front surface 344B is an example of a second surface. The third rear cam 344C is an example of the first cam portion, and the third front cam is an example of the second cam portion.

  The operation of the nailing machine 300 will be described. When the motor 3 starts rotating, the first gear 42 rotates clockwise, the second gear 43 rotates counterclockwise, and the third gear 344 rotates clockwise in front view. The outer moving portion 54 comes into contact with the first rear cam 42C of the first gear 42, the second rear cam 43C of the second gear 43, and the third rear cam 344C of the third gear 344 in this order and is pressed upward. Move to the dead point. The inner moving portion 52 comes into contact with the first front cam 42D of the first gear 42, the second front cam 43D of the second gear 43, and the third front cam of the third gear 344 in this order and is pressed downward to be dead. Move to the point. Thereafter, the inner moving part 52 and the outer moving part 54 accelerate upward and downward substantially simultaneously. The outer moving unit 54 strikes a nail when moving from the top dead center to the bottom dead center, and the inner moving unit 52 moves from the bottom dead center to the top dead center, thereby suppressing a reaction at the time of driving.

  Thus, the nail driver 300 according to the third embodiment of the present invention includes the first gear 42, the second gear 43, and the third gear 344, that is, moves the inner moving portion 52 and the outer moving portion 54. Since there are three gears with cams (gears with cams on both sides), and the three gears are arranged side by side in the vertical direction, the moving distance between the inner moving part 52 and the outer moving part 54 is increased. can do. Thereby, the acceleration distance of the inner side movement part 52 and the outer side movement part 54 can be lengthened without enlarging the horizontal dimension of the nailing machine 300, and driving force can be enlarged. In the nailing machine 300 according to the third embodiment of the present invention, three gears having cams on both surfaces are provided, but four or more gears may be provided.

  Further, the same operation and effect as the nailing machine 1 according to the first embodiment of the present invention are produced from the same configuration and elements as the nailing machine 1 in the nailing machine 300.

  The driving machine according to the present invention is not limited to the above-described embodiment, and various modifications are possible within the scope of the gist of the invention described in the claims. For example, the right spring 55A, the left spring 55B, and the inner spring 53 may be replaced with air springs, or a biasing force may be applied to the inner moving portion 52 and the outer moving portion 54 using magnetic force. The right spring 55A, the left spring 55B, and the inner spring 53 are compression springs. However, the right spring 55A, the left spring 55B, and the inner spring 53 are tension springs that accumulate elastic energy by extension and release elastic energy by releasing the extension state. Also good. Further, in the nailers 1, 200 and 300 according to the embodiment of the present invention, a plurality of gears having cams on both sides are provided, but a configuration having only one gear may be used.

DESCRIPTION OF SYMBOLS 1,200,300 ... Nail driver, 2 ... Housing, 3 ... Motor, 3A ... Rotating shaft, 4 ... Drive mechanism, 5, 205 ... Blowing mechanism, 6, 206 ... Nose part, 6a, 206a ... Injection hole, 7 ... Magazine, 41 ... Gear holder, 42 ... First gear, 42A ... First rear surface, 42B ... First front surface, 42C ... First rear cam, 42D ... First front cam, 43 ... Second gear, 43A ... Second rear surface 43B ... second front surface, 43C ... second rear cam, 43D ... second front cam, 51,251 ... holder portion, 52,252 ... inward moving portion, 52E ... right claw portion, 52F, 252F ... left claw portion, 53, 253 ... Inner spring, 54, 254 ... Outer moving part, 54B, 252B ... Rod, 54a ... Inner space, 55 ... Spring part, 55A ... Right spring, 55B ... Left spring 206a ... injection hole, 212A ... horizontal part, 212B ... vertical part, 212a ... insertion hole, 344 ... third gear, 344A ... third rear face, 344C ... third rear cam, 541A ... holding part body, 542A ... right Extension part, 542B ... Right rear plate part, 542C ... Lower claw part, 543A ... Left extension part, 543B ... Left rear plate part, 543C ... Upper claw part, L ... Virtual line segment, P ... Battery pack

Claims (6)

A housing;
A motor housed in the housing;
A nose portion for injecting a stop,
A magazine for supplying the fastener to the nose;
A striking portion provided in the housing so as to be reciprocally movable and striking the stopper supplied to the nose portion by moving in a striking direction;
Elastic energy is accumulated by the movement of the striking portion in the counter-blowing direction, and a first urging portion that accelerates the striking portion in the striking direction by releasing the accumulated elastic energy;
A weight portion that is reciprocally provided in the housing and configured to move in the counter-blowing direction when the striking portion moves in the striking direction;
Elastic energy is accumulated by movement of the weight portion in the striking direction, and a second urging portion that accelerates the weight portion in the counter striking direction by releasing the accumulated elastic energy;
A drive mechanism for releasing the accumulated elastic energy after accumulating elastic energy in the first urging portion and the second urging portion,
The drive mechanism has a first surface and a second surface that is the surface opposite to the first surface, and is rotated by driving the motor to move the striking portion in the counter-strike direction along with the rotation. A first cam portion for accumulating elastic energy in the first urging portion, and a second cam portion for accumulating elastic energy in the second urging portion by moving the weight portion in the striking direction along with the rotation. A rotating body having
The first cam portion protrudes from one of the first surface and the second surface, and the second cam portion protrudes from the other of the first surface and the second surface. Embedded machine. The first urging portion is configured to accumulate elastic energy by being compressed in the counter-hitting direction by movement of the hitting portion in the counter-hitting direction,
2. The driving force according to claim 1, wherein the second urging portion is configured to accumulate elastic energy by being compressed in the striking direction by movement of the weight portion in the striking direction. Machine. Either one of the first urging portion and the second urging portion has a first elastic portion and a second elastic portion,
The other of the first urging portion and the second urging portion is provided between the first elastic portion and the second elastic portion when viewed from the reciprocating direction. The driving machine according to claim 1 or 2. The striking portion has a wall portion and a claw portion that define an inner space,
The rotating body and the weight portion are accommodated in the inner space when viewed from the reciprocating direction,
The second surface is located closer to the weight part than the first surface,
The claw portion protrudes in a direction from the wall portion toward the first surface when viewed from the reciprocating direction, and comes into contact with the first cam portion with the rotation of the rotating body, thereby causing the striking portion to be counter-hit. The driving machine according to any one of claims 1 to 3, wherein the driving machine is configured to move in a direction. The weight portion has a wall portion and a claw portion that define an inner space,
The rotating body and the striking portion are accommodated in the inner space when viewed from the reciprocating direction,
The first surface is located closer to the striking part than the second surface,
The claw portion protrudes in a direction from the wall portion toward the second surface when viewed from the reciprocating direction, and comes into contact with the second cam portion as the rotating body rotates, so that the weight portion is moved in the striking direction. The driving machine according to any one of claims 1 to 3, wherein the driving machine is configured to be moved to the position. The drive mechanism includes at least three of the rotating bodies,
The driving machine according to any one of claims 1 to 5, wherein the at least three or more rotating bodies are arranged side by side in the reciprocating direction.

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