JP2024091453A - Driving tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a nail gun which facilitates an operation for opening or closing a magazine with a magazine cap part, which facilitates its opening or closing operation, and a door part.

SOLUTION: A nail gun 1A includes a magazine 2 and a body part 10. The magazine 2 includes: a housing part 20 which houses nails; and a cap part 22 which opens or closes the housing part 20. The body part 10 includes an engaging part 23c with which an engaged part 22e of the cap part 22 may engage. The magazine 2 moves in a first direction toward the body part 10 to cause the engaged part 22e to engage with the engaging part 23c, and the magazine 2 moves in a second direction away from the body part 10 to release engagement between the engaged part 22e and the engaging part 23c.

SELECTED DRAWING: Figure 2A

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a driving tool that has a magazine capable of storing fasteners and ejects the fasteners stored in the magazine.

Driving tools that eject fasteners such as screws and nails are equipped with a magazine that stores the fasteners. The magazine stores a fastener assembly in which multiple fasteners are connected by a connecting strap. Such tools have a nose portion from which the fasteners are ejected, a magazine cap portion provided on the magazine to allow the fastener assembly to be loaded into the magazine, and a door portion provided on the nose portion that can each be opened and closed (see, for example, Patent Document 1).

Patent No. 5482825

Conventionally, in order to open or close the magazine cap part on the magazine, it is necessary to open and close a door part on the nose part, and it is necessary to operate a separate member that holds the magazine cap part in the closed state. For this reason, the operation of opening and closing the magazine cap part is time-consuming.

The present invention was made to solve these problems, and aims to provide a driving tool that makes it easier to open and close the cap part of the magazine.

In order to solve the above-mentioned problems, the present invention provides a driving tool that has a main body, a storage section in which fasteners are stored, a cap section that opens and closes the storage section, and a magazine that is movable in a first direction toward the main body and a second direction away from the main body, the main body having an engagement section that can engage with the cap section when the cap section is closed, the cap section engages with the engagement section when the magazine moves in the first direction, and disengages from the engagement section when the magazine moves in the second direction from a state where the cap section is engaged with the engagement section.

In the present invention, when the magazine is moved in a first direction, the cap portion engages with the engagement portion, thereby holding the storage portion in a closed state. When the magazine is moved in a second direction, the cap portion disengages from the engagement portion, making it possible to open and close the cap portion.

In the present invention, the cap portion and the engagement portion can be engaged and disengaged by the action of moving the magazine. This allows the cap portion to be released from holding the storage portion in a closed state by the action of moving the magazine, and there is no need to operate a separate member that holds the cap portion in a closed state. This makes it easier to open and close the cap portion of the magazine.

FIG. 1 is a side view showing an example of a nail driver according to an embodiment of the present invention. FIG. 1 is a side view showing an example of a nail driver according to an embodiment of the present invention. FIG. 1 is a perspective view showing an example of a nail driver according to an embodiment of the present invention. FIG. 1 is a perspective view showing an example of a nail driver according to an embodiment of the present invention. FIG. 1 is a perspective view of a main portion showing an example of a nail driver according to an embodiment of the present invention. FIG. 1 is a perspective view of a main portion showing an example of a nail driver according to an embodiment of the present invention. FIG. 1 is a side cross-sectional view showing an example of a nail driver according to an embodiment of the present invention. FIG. 1 is a side cross-sectional view showing an example of a nail driver according to an embodiment of the present invention. FIG. 2 is a side cross-sectional view of a main portion of an example of a nail driver according to the present embodiment. FIG. 2 is a side cross-sectional view of a main portion of an example of a nail driver according to the present embodiment. FIG. 2 is a bottom cross-sectional view of a main portion of an example of a nail driver according to the present embodiment. FIG. 2 is a bottom cross-sectional view of a main portion of an example of a nail driver according to the present embodiment. FIG. 1 is a cross-sectional perspective view of a main portion showing an example of a nail driver according to an embodiment of the present invention. FIG. 1 is a cross-sectional perspective view of a main portion showing an example of a nail driver according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of a main part showing an example of a nail driver according to the present embodiment. FIG. 13 is a perspective view of a main portion showing an example of a nail driver according to a modified example of the present embodiment. FIG. 13 is a perspective view of a main portion showing an example of a nail driver according to a modified example of the present embodiment. FIG. 11 is a perspective view showing a main part of an example of a nail driver according to a second embodiment. FIG. 11 is a side view of a main portion showing an example of a nail driver according to a second embodiment. FIG. 11 is a side view of a main portion showing an example of a nail driver according to a second embodiment. FIG. 11 is a side view of a main portion showing an example of a nail driver according to a second embodiment. FIG. 11 is a side view of a main portion showing an example of a nail driver according to a second embodiment.

Below, we will explain an embodiment of a nail driver as an example of a driving tool of the present invention with reference to the drawings.

<Configuration example of the nail driver according to the present embodiment>
1A and 1B are side views showing an example of a nail driver according to the present embodiment, in which Fig. 1A shows a state in which a cap part for opening and closing a magazine is open, and Fig. 1B shows a state in which the cap part is closed and held.

Furthermore, Fig. 2A and Fig. 2B are perspective views showing an example of a nail driver according to this embodiment, with Fig. 2A showing a state in which the cap part can be opened, and Fig. 2B showing a state in which the cap part is closed and held.

Furthermore, Fig. 3A and Fig. 3B are perspective views of the main part of an example of a nail driver according to this embodiment, with Fig. 3A showing a state in which the cap part can be opened, and Fig. 3B showing a state in which the cap part is closed and held in place.

Furthermore, Fig. 4A and Fig. 4B are side cross-sectional views showing an example of a nail driver according to this embodiment, with Fig. 4A showing a state in which the cap part can be opened, and Fig. 4B showing a state in which the cap part is closed and held in place.

Furthermore, Fig. 5A and Fig. 5B are side cross-sectional views of the main part showing an example of a nail driver of this embodiment, Fig. 5A shows a state in which the cap part can be opened, and Fig. 5B shows a state in which the cap part is closed and held.

Furthermore, Fig. 6A and Fig. 6B are cross-sectional views of the bottom of the main part showing an example of a nail driver according to this embodiment, with Fig. 6A showing a state in which the cap part can be opened, and Fig. 6B showing a state in which the cap part is closed and held in place.

Furthermore, Fig. 7A and Fig. 7B are perspective cross-sectional views of the essential parts showing an example of a nail driver according to this embodiment, with Fig. 7A showing a state in which the cap part can be opened, and Fig. 7B showing a state in which the cap part is closed and held in place.

Furthermore, Figure 8 is an exploded perspective view of the essential parts of an example of a nail driver according to this embodiment.

The nail gun 1A includes a magazine 2 that stores nails 200, a main body 10 having a mechanism for driving the nails 200, a mechanism for receiving an operation for driving the nails 200, and an ejection passage for the nails 200. The main body 10 includes a barrel 11 in which a striking unit 3 for driving the nails 200 is provided, and a handle 12 extending in a direction intersecting the barrel 11. The main body 10 also includes a nose 13 having an ejection passage 13a through which the nails 200 stored in the magazine 2 are supplied. The nail gun 1A also includes a feed unit 8 that feeds the nails 200 to the ejection passage 13a of the nose 13. In the nail gun 1A, the nails 200 supplied to the ejection passage 13a by the feed unit 8 are ejected from the ejection opening 13d of the ejection passage 13a by the striking unit 3. The nails 200 driven by the striking unit 3 pass through the ejection passage 13a.

The nail driver 1A has one side along the extension direction of the body 11, where the nose portion 13 is provided, as the lower side, and the other side along the extension direction of the body 11, which is opposite to the side where the nose portion 13 is provided, as the upper side. The nail driver 1A has a magazine 2 provided below the handle portion 12.

In the nail gun 1A, multiple nails 200, which are fasteners, are connected by connecting bands (not shown), and connected nails 200a, for example, wound in a spiral shape, are stored in the magazine 2.

Next, the magazine 2 and the mechanism for opening and closing the magazine 2 will be described. The magazine 2 is an example of a supply section that supplies the nails 200 to the ejection passage 13a, and an evacuation section that evacuates the nails 200 supplied to the ejection passage 13a from a portion other than the ejection port 13d to the outside of the ejection passage 13a, and includes a storage section 20 that stores the spirally wound portion of the connecting nail 200a, and a first passage section 21 through which the portion pulled out from the spirally wound portion passes.

The storage section 20 is configured as a space shaped to accommodate the spirally wound portion of the connecting nail 200a. The first passage section 21 extends from the storage section 20 toward the nose section 13 along the feed direction of the nail 200. The magazine 2 is configured such that the storage section 20 and the first passage section 21 are integrated together.

The nose portion 13 has a second passage portion 13b that is connected to the ejection passage 13a. The second passage portion 13b is an example of a passage portion, and extends along the feed direction of the nail 200 from the storage portion 20 to the nose portion 13. The second passage portion 13b is connected to the ejection passage 13a on the downstream side of the above-mentioned feed direction of the nail 200, and is connected to the first passage portion 21 on the upstream side of the above-mentioned feed direction of the nail 200. Note that the nose portion 13 may not have the second passage portion 13b, and the first passage portion 21 of the magazine 2 may be connected to the ejection passage 13a. In such a configuration, the first passage portion 21 is an example of a passage portion.

The magazine 2 has a fastener support part 20a that rotatably supports the spirally wound part of the connecting nail 200a. The fastener support part 20a has a support shaft 20b that is inserted into the center of the spirally wound part of the connecting nail 200a.

The magazine 2 includes a storage section 20 and a cap section 22 that opens and closes a first passage section 21 and a portion of the second passage section 13b that is closer to the first passage section 21. The cap section 22 is integrally formed of a first section 22a that covers the storage section 20 and a second section 22b that covers a portion of the first passage section 21 and the second passage section 13b that is closer to the first passage section 21. The cap section 22 opens and closes the storage section 20 and the first passage section 21 and a portion of the second passage section 13b that is closer to the first passage section 21 by rotating about an axis 22c.

In the magazine 2, the shaft 22c is supported by a shaft support portion 20c provided in the storage portion 20. The magazine 2 has a wall portion 20d that constitutes a part of the lower surface of the storage portion 20. The shaft support portion 20c is provided on the wall portion 20d. The cap portion 22 has a wall portion 22d that constitutes a part of the lower surface of the first portion 22a. The cap portion 22 has the wall portion 22d supported by the shaft 22c. In addition, the fastener support portion 20a has one end of the support shaft 20b supported by the shaft 22c. The fastener support portion 20a rotates from the storage position to the loading position with the shaft 22c as a fulcrum.

The fastener support portion 20a is biased by the biasing member 20e in the direction to open the cap portion 22. In conjunction with the operation of opening the cap portion 22, the fastener support portion 20a rotates to the loading position with the bias of the biasing member 20e, with the shaft 22c as the fulcrum, so that the support shaft 20b protrudes obliquely from the storage portion 20. The cap portion 22 is biased in the opening direction by the force of the biasing member 20e biasing the fastener support portion 20a, and the open state is maintained.

The nail gun 1A includes a door section 23 that opens and closes the ejection passage 13a of the nose section 13 and the remaining part of the second passage section 13b on the side closer to the ejection passage 13a. The door section 23 is configured to cover a part or all of the side of the ejection passage 13a that intersects with the direction in which the nail 200 is driven out and the remaining part of the first passage section 21 other than the part covered by the second part 22b of the cap section 22, and opens and closes the ejection passage 13a and the remaining part of the second passage section 13b by rotating the shaft 23a as a fulcrum. The door section 23 may be configured integrally with the cap section 22, and the ejection passage 13a and the remaining part of the second passage section 13b may be opened and closed by the action of the cap section 22 opening and closing the storage section 20. The door section 23 may also be fixed to the nose section 13 and not opened and closed.

The shaft 23a is supported by a shaft support portion 23b provided on the nose portion 13. The shaft support portion 23b is provided on the opposite side of the nose portion 13 to the second passage portion 13b that is connected to the injection passage 13a. The door portion 23 is equipped with a door operation portion 23d that receives an operation to release the closed state. When the door operation portion 23d is operated, the door portion 23 is released from the closed state, and the injection passage 13a and the remaining portion of the second passage portion 13b can be opened and closed by rotating the shaft 23a as a fulcrum.

The nail gun 1A includes a magazine support section 24 that movably supports the magazine 2. The magazine support section 24 is an example of a supply section and a retraction section, and in this example, is provided in the nose section 13. The magazine support section 24 also constitutes a part of the second passage section 13b.

Guided by the magazine support section 24, the magazine 2 can slide in a first direction indicated by arrow A1 and a second direction indicated by arrow A2, which is opposite to the first direction, along the feed direction of the nails 200 in the first passage section 21 and the second passage section 13b. In addition, a feed member 80 (described later) of the feed section 8, which is an example of a supply section and a retreat section, is attached to the magazine 2. In addition, a feed piston 81 and a feed cylinder 82 (described later) are attached to the magazine 2. In addition, a switching cylinder 83a of a switching section 83 (described later) is attached to the magazine 2. As a result, when the magazine 2 moves guided by the magazine support section 24, the feed member 80, feed piston 81, feed cylinder 82, and switching cylinder 83a of the feed section 8 move together with the magazine 2 in the same direction as the movement direction of the magazine 2.

The cap portion 22 is connected to the magazine 2 via shaft 22c and moves together with the magazine 2.

The magazine 2 moves between a closed position P1, where the cap portion 22 is held in a closed state, and an openable/closable position P2, where the cap portion 22 is released from the closed state and can be opened and closed. The closed position P1 is the first position, and the openable/closable position P2 is the second position.

The magazine 2 moves in a first direction indicated by arrow A1 from the openable position P2 to the closed position P1. The first direction is the direction in which the magazine 2 approaches the main body 10, in this example the nose 13. The magazine 2 also moves in a second direction indicated by arrow A2 from the closed position P1 to the openable position P2. The second direction is the direction in which the magazine 2 moves away from the main body 10, in this example the nose 13.

The door portion 23 has an engaging portion 23c with which the cap portion 22 engages when the magazine 2 is moved to the closed position P1. The cap portion 22 also has an engaged portion 22e with which the engaging portion 23c engages when the magazine 2 is moved to the closed position P1. When the magazine 2 is moved to the openable/closable position P2 and the magazine 2 is closed, the second portion 22b of the cap portion 22 faces the door portion 23 along the movement direction of the magazine 2. The engaged portion 22e is provided on the second portion 22b of the cap portion 22 that faces the door portion 23 when the magazine 2 is closed. The engaged portion 22e protrudes from the second portion 22b toward the door portion 23 in the direction of arrow A1 along the movement direction of the magazine 2. The engaging portion 23c is provided in a portion of the door portion 23 that closes the remaining portions of the ejection passage 13a and the second passage portion 13b, facing the engaged portion 22e of the cap portion 22 that closes the magazine 2. The engaging portion 23c extends along the movement direction of the magazine 2 and is configured with a recess into which the engaged portion 22e can be inserted and removed.

As a result, the magazine 2 moves in the first direction from the openable position P2 to the closed position P1 by the guide of the magazine support portion 24, and the engaged portion 22e of the cap portion 22 engages with the engaging portion 23c of the door portion 23. In addition, the magazine 2 moves in the second direction from the closed position P1 to the openable position P2, and the engagement between the engaged portion 22e and the engaging portion 23c is released.

The door section 23 is provided with a pressing section 25 that presses the cap section 22 when the magazine 2 is closed. The pressing section 25 is configured in a shape that covers a part of the cap section 22, and moves between a pressing position where the cap section 22 is pressed and an open position where the cap section 22 is released from the pressing by a rotational movement with the shaft 25a as a fulcrum.

The pressing portion 25 is biased in a rotating direction from the pressing position to the release position by a biasing member 25b such as a torsion coil spring.

The pressing portion 25 has an action portion 25c that is pressed by the engaged portion 22e. The action portion 25c is provided in the movement path of the engaged portion 22e caused by the movement of the magazine 2.

When the magazine 2 moves, the action part 25c of the pressing part 25 is pressed by the engaged part 22e, and the pressing part 25 rotates from the release position to the pressing position by a rotational movement with the shaft 25a as a fulcrum. The pressing part 25 is held in the pressing position by the action part 25c being pressed by the engaged part 22e. Furthermore, when the engaged part 22e separates from the action part 25c due to the movement of the magazine 2, the pressing part 25 rotates from the pressing position to the release position due to the biasing force of the biasing member 25b.

The nail gun 1A is equipped with an operating unit 26 that receives an operation to move the magazine 2. The operating unit 26 is attached to the storage unit 20 of the magazine 2 via a shaft 26a.

The operating unit 26 includes a holding portion 27 that holds the magazine 2 in the open position P1 and the openable/closable position P2.

The holding portion 27 is configured as an elongated hole extending along the movement direction of the magazine 2, and a first engagement recess 27a is provided at one end in the extension direction, extending in a direction intersecting the extension direction of the holding portion 27. In addition, a second engagement recess 27b is provided at the other end in the extension direction, extending in a direction intersecting the extension direction of the holding portion 27.

A shaft 27c provided on the handle portion 12 side is inserted into the holding portion 27. The shaft 27c does not move in response to the movement of the magazine 2. In contrast, the holding portion 27 is displaced relative to the shaft 27c when the magazine 2 moves and when the operating portion 26 rotates about the shaft 26a.

When the magazine 2 is moved to the closed position P1, the first engagement recess 27a of the holding portion 27 faces the shaft 27c. When the operating portion 26 rotates in a first rotation direction indicated by the arrow B1, which is one direction, with the shaft 26a as a fulcrum, the first engagement recess 27a of the holding portion 27 engages with the shaft 27c. This causes the magazine 2 to be held in the closed position P1.

When the holding portion 27 has moved to the closed position P1 and the first engagement recess 27a is engaged with the shaft 27c, the first engagement recess 27a is disengaged from the shaft 27c when the operating portion 26 rotates in the second rotation direction indicated by the arrow B2, which is the other direction, around the shaft 26a as the fulcrum. This allows the magazine 2 to move from the closed position P1 to the openable/closable position P2. Therefore, when the magazine 2 has moved to the closed position P1, the operating portion 26 is rotated in the second rotation direction, and then a force is applied to move the magazine 2 in the second direction indicated by the arrow A2, so that the magazine 2 and the cap portion 22 move together in the second direction.

When the magazine 2 is moved to the openable/closable position P2, the second engagement recess 27b of the holding portion 27 faces the shaft 27c. When the operating portion 26 rotates in the first rotation direction with the shaft 26a as the fulcrum, the second engagement recess 27b of the holding portion 27 engages with the shaft 27c. This holds the magazine 2 in the openable/closable position P2.

When the holding part 27 has moved to the openable/closable position P2 and the second engagement recess 27b is engaged with the shaft 27c, the second engagement recess 27b is disengaged from the shaft 27c when the operating part 26 rotates in the second rotation direction indicated by the arrow B2 around the shaft 26a. This allows the magazine 2 to move from the openable/closable position P2 to the closed position P1. Therefore, when the magazine 2 has moved to the openable/closable position P2, the operating part 26 is rotated in the second rotation direction, and then a force is applied to move the magazine 2 in the first direction indicated by the arrow A1, so that the magazine 2 and the cap part 22 move together in the first direction.

The nail gun 1A includes a sub-operation unit 28 that prevents the cap unit 22 from opening when the magazine 2 is in the openable position P2. The sub-operation unit 28 is configured to be able to hold the cap unit 22 that closes the storage unit 20 when the magazine 2 is in the openable position P2. The sub-operation unit 28 may be configured to be able to hold the cap unit 22 that closes the storage unit 20 when the magazine 2 is in the closed position P1, and to move together with the magazine 2 while maintaining the sub-operation unit 28 holding the cap unit 22 when the magazine 2 moves from the closed position P1 to the openable position P2.

Next, a mechanism for driving the nail 200, a mechanism for receiving an operation for driving the nail 200, and a mechanism for feeding the nail 200 will be described. The nail gun 1A includes a main valve 4 for switching between supplying compressed air to the striking unit 3, a start valve 5 for operating the main valve 4, and a trigger 6 for switching between a sign-in state for enabling the start valve 5 and a sign-off state for deactivating the start valve 5. The nail gun 1A also includes a contact unit 7 for contacting a workpiece (not shown) and switching between a sign-in state for enabling the start valve 5 and a sign-off state for deactivating the start valve 5. The nail gun 1A also includes a feed unit 8 for feeding the nail 200 to the injection passage 13a of the nose unit 13. The nail gun 1A goes into a sign-in state for enabling the start valve 5 by pulling the trigger 6. From this sign-in state, the start valve 5 is activated by pressing the contact unit 7 against the workpiece (not shown). In addition, the contact portion 7 is pressed against the workpiece (not shown) to set the start valve 5 in a signed-in state that allows it to be operated. From this signed-in state, the start valve 5 is activated by pulling the trigger 6.

The striking section 3 is an example of a striking section, and includes a striking cylinder 30 to which compressed air is supplied. The striking cylinder 30 is provided inside the body 11 in a form that extends vertically. The striking cylinder 30 has a striking piston 31 provided in a slidable manner in the cylindrical internal space. The striking section 3 protrudes below the striking piston 31, and a driver 32 is attached to the striking piston 31.

The nail gun 1A is equipped with a blowback chamber 33 connected to the striking cylinder 30. In the nail gun 1A, compressed air is supplied from the striking cylinder 30 to the blowback chamber 33 as the striking piston 31 moves from the top dead center position to the bottom dead center position. Then, when the sign-off state is reached and the air above the striking piston 31 of the striking cylinder 30 is discharged, the compressed air in the blowback chamber 33 is discharged via the striking cylinder 30, and the air pressure of the compressed air supplied from the blowback chamber 33 to below the striking piston 31 of the striking cylinder 30 returns the striking piston 31 to the top dead center position. In addition, the nail gun 1A operates the feeding section 8 with the air pressure of the compressed air supplied from the blowback chamber 33 to the feeding section 8.

The main valve 4 opens and closes the air flow path connecting the main chamber 34, which receives compressed air from an external air compressor (not shown), and the striking cylinder 30. The starting valve 5 operates the pilot valve 51 when the valve stem 50 is pressed by a combination of the operation of the trigger 6 and the operation of pressing the contact part 7 against the workpiece. The starting valve 5 changes the air pressure applied to the main valve 4 by operating the pilot valve 51. The main valve 4 operates based on the balance between the biasing force of the main valve spring 40 and the air pressure applied to the main valve 4.

The feed section 8 is an example of a supply section and a retraction section, and includes a feed member 80 that feeds the connecting nails 200a, a feed piston 81 that is connected to the feed member 80, and a feed cylinder 82 that operates the feed piston 81. The feed section 8 also includes a switching section 83 that switches between on and off the supply of compressed air from the blowback chamber 33 to the feed cylinder 82.

The feed member 80 has a claw portion 80a that protrudes into the second passage portion 13b. The claw portion 80a of the feed member 80 engages with the nail 200. The feed member 80 is supported movably relative to the second passage portion 13b. The feed member 80 is configured to be movable in a direction in which the claw portion 80a approaches and moves away from the ejection passage 13a of the nose portion 13. The feed member 80 is also configured to be movable in a direction in which the claw portion 80a protrudes from the second passage portion 13b and in a direction in which the claw portion 80a retreats from the second passage portion 13b by rotating about the shaft 80b. When the magazine 2 has moved to the openable/closable position P2 in which the cap portion 22 can be opened and closed, the feed member 80 has the claw portion 80a positioned in the second direction from the door portion 23. As a result, when the cap portion 22 is opened, the claw portion 80a is exposed to the second passage portion 13b even when the door portion 23 is closed, making it possible to load the connecting nail 200a. Note that when the leading nail 200 of the connecting nail 200a is positioned in the ejection passage 13a, the claw portion 80a of the feed member 80 engages with the second nail 200 of the connecting nail 200a.

The feed piston 81 is supported so that it can slide within the feed cylinder 82. The feed cylinder 82 is connected to the blowback chamber 33 via the feed flow path 84 and the switching unit 83, and compressed air is supplied from the blowback chamber 33.

The feed piston 81 is actuated by the air pressure of the compressed air supplied from the blowback chamber 33, and moves the feed member 80 in a direction away from the injection passage 13a. The feed piston 81 is also urged by a biasing member 85 such as a coil spring in a direction in which the feed member 80 approaches the injection passage 13a. When the air pressure in the feed cylinder 82 decreases as a result of the air in the feed cylinder 82 flowing into the blowback chamber 33 and being discharged via the striking cylinder 30, the feed piston 81 is urged by the biasing member 85 to move the feed member 80 in a direction approaching the injection passage 13a.

The switching unit 83 includes a switching cylinder 83a connected to the feed flow path 84, and a switching valve 83b that opens and closes the feed flow path 84. The switching unit 83 has the switching valve 83b supported in a slidable manner within the switching cylinder 83a. The switching unit 83 switches between connecting the outlet 83c formed in the switching valve 83b to the feed flow path 84 and sealing the gap between the outlet 83c and the feed flow path 84 with the relative movement of the switching cylinder 83a and the switching valve 83b.

The feed member 80 is attached to the magazine 2. Furthermore, the feed piston 81 and the feed cylinder 82 are attached to the magazine 2. Furthermore, the switching cylinder 83a of the switching unit 83 is attached to the magazine 2. As a result, when the magazine 2 moves in the first direction by the guide of the magazine support unit 24, the feed member 80, feed piston 81, feed cylinder 82, and switching cylinder 83a of the feed unit 8 move in the first direction together with the magazine 2. Furthermore, when the magazine 2 moves in the second direction by the guide of the magazine support unit 24, the feed member 80, feed piston 81, feed cylinder 82, and switching cylinder 83a move in the second direction together with the magazine 2.

The switching valve 83b of the switching unit 83 is attached to the nose portion 13. As a result, by moving the magazine 2, the relative position of the switching valve 83b to the switching cylinder 83a changes, switching between communication between the outlet 83c and the feed flow path 84 and whether or not to supply compressed air from the blowback chamber 33 to the feed cylinder 82.

The feed member 80 moves together with the magazine 2 in the operation of moving the magazine 2 from the closed position P1 to the openable position P2, thereby moving from the feed operation position P5 to the retracted position P6. When the feed member 80 moves to the feed operation position P5 with the connecting nail 200a engaged, it moves the connecting nail 200a to the ejectable position P3. When the feed member 80 moves to the retracted position P6 with the connecting nail 200a engaged, it moves the connecting nail 200a to the removable position P4.

As a result, the nail gun 1A moves the magazine 2 from the closed position P1 to the openable position P2, and the connecting nail 200a moves from the ejectable position P3 to the removable position P4. When the connecting nail 200a moves to the ejectable position P3, the leading nail 200 is positioned in the ejection passage 13a. When the connecting nail 200a moves to the removable position P4, the leading nail 200 retreats to the outside of the ejection passage 13a from a location other than the ejection port 13d. Furthermore, when the connecting nail 200a moves to the removable position P4, the cap portion 22 opens with the magazine 2 moved to the openable position P2, exposing the connecting nail 200a to the first passage portion 21 and the second passage portion 13b.

When the magazine 2 is moved to the closed position P1, the feed member 80 moves to the feed operation position P5 as the feed piston 81 is biased by the biasing member 85. When the feed member 80 moves to the feed operation position P5, the leading nail 200 of the connecting nails 200a engaged with the feed member 80 moves to the ejectable position P3.

When the magazine 2 of the nail gun 1A is moved to the closed position P1, compressed air is supplied to the feed cylinder 82 in conjunction with the operation of driving the nail 200 with the striking unit 3, and the feed member 80 moves a predetermined amount in the second direction from the feed operation position P5, and then moves in the first direction due to a decrease in air pressure in the feed cylinder 82 and the biasing force of the biasing member 85, returning to the feed operation position P5.

As a result, the feed operation position P5 is a position where normal nail feeding is possible, in which the nail 200 is moved to the ejection position P3 by the reciprocating movement of the feed member 80 caused by the supply of compressed air linked to the operation of driving the nail 200 with the striking unit 3.

When the magazine 2 moves from the closed position P1 to the openable position P2, the feed member 80 moves from the feed operation position P5 to the retracted position P6. When the feed member 80 moves to the retracted position P6, the leading nail 200 of the connecting nails 200a engaged with the feed member 80 moves from the ejectable position P3 to the removable position P4. The removable position P4 is a position where the nail 200 is a predetermined distance away in the second direction from the path of movement of the driver 32 through the ejection passage 13a.

Therefore, the retracted position P6 is a position where the connecting nail 200a can be removed from the first passage portion 21 and the second passage portion 13b. The retracted position P6 is also a position where the leading nail 200 of the connecting nail 200a will not be driven in even if the driver 32 moves. For this reason, the removal position P4 is also called an ejection avoidance position where the ejection of the nail 200 is avoided.

When the magazine 2 is moved to the closed position P1, the flow outlet 83c and the feed passage 84 are connected by a change in the relative position of the switching valve 83b with respect to the switching cylinder 83a, making it possible to supply compressed air from the blowback chamber 33 to the feed cylinder 82. In contrast, when the magazine 2 moves from the closed position P1 to the openable position P2, the space between the flow outlet 83c and the feed passage 84 is sealed, and the supply of compressed air from the blowback chamber 33 to the feed cylinder 82 is cut off.

As a result, when the magazine 2 has moved to the openable position P2, the feed member 80 does not move back and forth in the retracted position P6 even if the striking unit 3 drives in the nail 200. In contrast, the feed member 80 may move back and forth after moving to the retracted position P6, so long as the leading nail 200 of the connecting nails 200a engaged with the feed member 80 does not move to the ejectable position P3. In this case, compressed air may be supplied from the blowback chamber 33 to the feed cylinder 82 even when the magazine 2 moves from the closed position P1 to the openable position P2.

The feed member 80 moves between the feed operation position P5 and the retracted position P6 by moving in the first and second directions in the same way as the magazine 2, but may be configured to move in a direction different from that of the magazine 2. For example, in order to move the feed member 80 from the feed operation position P5 to the retracted position P6, the magazine 2 and the feed cylinder 82 may move in a diagonal direction that gradually separates them from the second direction, and the feed member 80 may move in the second direction.

As described above, in the nail gun 1A, when the magazine 2 is moved to the closed position P1 and the feed member 80 moves a predetermined amount in the second direction from the feed operation position P5, the movement of the connecting nail 200a in a direction away from the ejection passage 13a is restricted.

Therefore, the feed unit 8 is provided with a regulating unit 86 that switches between restricting and not restricting the movement of the connecting nail 200a from the ejection position P3 shown in FIG. 7B to the removal position P4 shown in FIG. 7A.

The restricting portion 86 has a claw portion 86a that engages with the nail 200. The restricting portion 86 is biased by a biasing member (not shown) in a direction in which the claw portion 86a protrudes from the hole portion 13c of the second passage portion 13b by a rotational movement with the shaft 86b as a fulcrum.

The restricting portion 86 has a restricting surface 86c formed on the side of the claw portion 86a facing the injection passage 13a, the restricting surface 86c being a surface that is approximately perpendicular to the feed direction of the connecting nail 200a. In addition, the restricting portion 86 has a sloped surface 86d formed on the side of the claw portion 86a facing the storage portion 20, the sloped surface 86d being a surface that is inclined in a direction in which the amount of protrusion from the hole portion 13c decreases toward the storage portion 20, relative to the feed direction of the connecting nail 200a.

When the magazine 2 is moved to the closed position P1 as shown in FIG. 4B, the restricting portion 86 has the claw portion 86a facing the hole portion 13c of the second passage portion 13b as shown in FIG. 7B. As a result, the restricting portion 86 is biased by the biasing member 86e, and moves with the shaft 86b as a fulcrum to a movement restriction position P7 where the claw portion 86a protrudes from the hole portion 13c toward the surface side of the second passage portion 13b.

The restricting portion 86 is attached to the magazine 2. In this example, the restricting portion 86 is configured to be movable integrally with the magazine 2 by having the shaft 86b supported by the feed cylinder 82. When the magazine 2 moves from the closed position P1 to the openable position P2, as shown in FIG. 4A, the inclined surface 86d of the claw portion 86a of the restricting portion 86 is pressed against the opening edge of the hole portion 13c. As a result, the restricting portion 86 moves to the unrestricted position P8, which is retreated to the back side of the second passage portion 13b, by a rotational movement with the shaft 86b as a fulcrum, as shown in FIG. 7A.

<Magazine opening and closing operation example>
Next, an example of the opening and closing operation of the cap portion 22 will be described.

When the magazine 2 is moved to the closed position P1, the cap portion 22 closes the storage portion 20, and the cap portion 22 is held in a state in which the storage portion 20 is closed. That is, the engaged portion 22e of the cap portion 22 of the magazine 2 is engaged with the engaging portion 23c of the door portion 23.

When the magazine 2 is moved to the closed position P1, the first engagement recess 27a of the holding portion 27 of the operating portion 26 faces the shaft 27c. Then, the operating portion 26 rotates in the first rotation direction with the shaft 26a as a fulcrum, so that the first engagement recess 27a of the holding portion 27 engages with the shaft 27c.

Furthermore, when the magazine 2 is moved to the closed position P1, the action portion 25c of the pressing portion 25 is pressed by the engaged portion 22e, and the pressing portion 25 rotates from the open position to the pressing position by a rotational motion with the shaft 25a as a fulcrum, and is held in the pressing position. As a result, the magazine 2 is held in the closed position P1.

Furthermore, when the magazine 2 is moved to the closed position P1, the flow outlet 83c of the feed section 8 is connected to the feed flow path 84 by the relative movement of the switching cylinder 83a and the switching valve 83b of the switching section 83.

To open the cap portion 22, the magazine 2 is moved in the second direction. To do this, first, the operating portion 26 is moved in the direction in which the magazine 2 moves in the second direction. When the operating portion 26 receives a force that moves the magazine 2 in the second direction, the operating portion 26 rotates in the second rotation direction with the shaft 26a as the fulcrum. When the operating portion 26 rotates in the second rotation direction, the engagement between the first engagement recess 27a and the shaft 27c is released. This allows the magazine 2 to move from the closed position P1 to the openable/closable position P2.

When the magazine 2 is operated by further moving the operating portion 26 in the second direction, the storage portion 20 and the cap portion 22 move together in the second direction. When the magazine 2 moves from the closed position P1 to the openable position P2, the engaged portion 22e disengages from the engaging portion 23c, and the engagement between the engaged portion 22e and the engaging portion 23c is released. In this way, by moving the operating portion 26 in the direction in which the magazine 2 moves in the second direction, the operation of releasing the engagement between the first engaging recess 27a and the shaft 27c and the operation of moving the magazine 2 from the closed position P1 to the openable position P2 can be performed simultaneously.

When the magazine 2 moves from the closed position P1 to the openable position P2, the engaging portion 22e of the pressing portion 25 separates from the acting portion 25c, and the pressing portion 25 rotates from the pressing position to the open position due to the biasing force of the biasing member 25b.

This allows the cap portion 22 to be opened relative to the storage portion 20. When the nails 200 are not stored in the magazine 2, the fastener support portion 20a is biased by the biasing member 20e in a direction to open the cap portion 22, so that the cap portion 22 opens in conjunction with the fastener support portion 20a.

When the magazine 2 moves from the closed position P1 to the openable position P2, the first passage 21 separates from the second passage 13b. When the magazine 2 moves from the closed position P1 to the openable position P2, the feed member 80 of the feed section 8 moves in the second direction in conjunction with the magazine 2. When the magazine 2 moves from the closed position P1 to the openable position P2, the restricting section 86 moves to a restriction release position P8 in which the claw 86a retreats to the back side of the second passage 13b. As a result, when the magazine 2 moves to the openable position P2 with the nails 200 stored in it, the nails 200 engage with the claw 80a, causing the connecting nails 200a to move in the second direction, and the leading nail 200 moves from the ejection passage 13a to the first passage 21 side and retreats from the ejection passage 13a.

When the magazine 2 moves to the openable/closable position P2, the feed section 8 has the flow outlet 83c and the feed flow path 84 sealed by the sealant 83d due to the relative movement of the switching cylinder 83a and the switching valve 83b of the switching section 83. As a result, when the magazine 2 moves to the openable/closable position P2, compressed air is not supplied to the feed section 8, and the feed section 8 does not operate, even if the nail gun 1A is operated.

Furthermore, when the magazine 2 moves to the openable/closable position P2 and the second engagement recess 27b faces the shaft 27c, and the force moving the magazine 2 in the second direction is no longer applied to the operating unit 26, the operating unit 26 rotates in the first rotation direction with the shaft 26a as the fulcrum. When the operating unit 26 rotates in the first rotation direction, the second engagement recess 27b engages with the shaft 27c. This holds the magazine 2 in the openable/closable position P2.

To load the nails 200 into the magazine 2, the spirally wound portion of the connecting nail 200a is inserted into the support shaft 20b of the fastener support part 20a. When the connecting nail 200a is loaded, the fastener support part 20a rotates to the storage position due to the weight of the connecting nail 200a.

To load the nails 200 into the magazine 2, the portion of the connecting nail 200a pulled out from the spirally wound portion is loaded into the first passage portion 21 and the second passage portion 13b. When the cap portion 22 is open, the claw portion 80a of the feed member 80 is exposed to the second passage portion 13b. As a result, the nail 200 engages with the claw portion 80a when the portion of the connecting nail 200a pulled out from the spirally wound portion is loaded into the first passage portion 21 and the second passage portion 13b. When loading the connecting nail 200a into the first passage portion 21 and the second passage portion 13b, it is not necessary to load the leading nail 200 into the ejection passage 13a of the nose portion 13.

After loading the nails 200 into the magazine 2, the cap portion 22 is closed. When the magazine 2 is in the openable/closable position P2, the cap portion 22 is not held in the closed state even if it is closed.

After the cap part 22 is closed, the magazine 2 is moved in the first direction. To this end, first, the operating part 26 is rotated in the second rotation direction with the shaft 26a as the fulcrum. When the operating part 26 rotates in the second rotation direction, the engagement between the second engagement recess 27b and the shaft 27c is released. As a result, the magazine 2 can be moved from the openable/closable position P2 to the closed position P1 by moving the operating part 26 in the direction moving in the first direction. Note that, after the cap part 22 is closed, if the magazine 2 is directly pushed to apply a force to move it in the first direction, the engagement between the second engagement recess 27b and the shaft 27c is maintained until a predetermined load is applied. When the magazine 2 is directly pushed and a predetermined load is applied, the operating part 26 rotates in the second rotation direction with the shaft 26a as the fulcrum, and the engagement between the second engagement recess 27b and the shaft 27c is released. This allows the magazine 2 to be moved from the openable position P2 to the closed position P1 by simply pushing the magazine 2 in the first direction.

When the magazine 2 is operated by further moving the operating portion 26 in the first direction, the storage portion 20 and the cap portion 22 move together in the first direction. When the magazine 2 moves from the openable position P2 to the closed position P1 with the cap portion 22 closed, the engaged portion 22e presses the acting portion 25c of the pressing portion 25. When the acting portion 25c is pressed by the engaged portion 22e, the pressing portion 25 rotates from the open position to the pressing position by a rotational movement with the shaft 25a as a fulcrum. Furthermore, when the acting portion 25c is pressed by the engaged portion 22e, the pressing portion 25 is held in the pressing position.

When the magazine 2 moves from the openable position P2 to the closed position P1 with the cap portion 22 closed, the engaged portion 22e engages with the engaging portion 23c. As a result, the magazine 2 moves to the closed position P1, and the cap portion 22 is held in a state in which the storage portion 20 is closed. The cap portion 22 in the closed state is held down by the holding portion 25.

Furthermore, when the magazine 2 moves from the openable position P2 to the closed position P1, the first passage 21 and the second passage 13b are connected. Also, when the magazine 2 moves from the openable position P2 to the closed position P1, the feed member 80 of the feed section 8 moves in the first direction in conjunction with the magazine 2. As a result, when the magazine 2 moves to the closed position P1 with nails 200 stored in it, the nails 200 engage with the claw portion 80a, causing the nails 200 to move in the first direction, and the leading nail 200 moves to the ejection passage 13a.

Furthermore, when the magazine 2 moves from the openable position P2 to the closed position P1, the restricting portion 86 moves to a movement restricting position P7 where the claw portion 86a protrudes from the hole portion 13c toward the surface side of the second passage portion 13b. As a result, the restricting portion 86 restricts the movement of the connecting nail 200a in a direction away from the ejection passage 13a.

When the magazine 2 moves to the closed position P1, the flow outlet 83c of the feed unit 8 is connected to the feed flow path 84 by the relative movement of the switching cylinder 83a and the switching valve 83b of the switching unit 83. As a result, when the nail gun 1A is operated while the magazine 2 is in the closed position P1, compressed air is supplied to the feed unit 8 at a predetermined timing, and the feed unit 8 is operated.

When the magazine 2 moves to the closed position P1 and the first engagement recess 27a faces the shaft 27c, and the force moving the magazine 2 in the first direction is no longer applied to the operating unit 26, the operating unit 26 rotates in the first rotation direction with the shaft 26a as the fulcrum. When the operating unit 26 rotates in the first rotation direction, the first engagement recess 27a engages with the shaft 27c. This holds the magazine 2 in the closed position P1.

As with the conventional configuration, the nail gun 1A can also be operated to release the door section 23 from the closed state by operating the door operating section 23d, and open the door section 23 to open the cap section 22. That is, when the door section 23 is opened, the engaging section 23c is disengaged from the position where it engages with the engaged section 22e, and the pressing section 25 is disengaged from the position where it presses the cap section 22. As a result, when the door section 23 is opened, the cap section 22 opens, and the claw section 80a of the feed member 80 is exposed.

When removing a partially used connecting nail 200a for replacement or other reasons, the magazine 2 is moved from the closed position P1 to the openable position P2, and the cap portion 22 is opened, as described above.

When the nail gun 1A moves the magazine 2 to the openable position P2 while the connecting nail 200a is in the ejectable position P3, the connecting nail 200a moves to the removable position P4. When the connecting nail 200a moves to the removable position P4, the leading nail 200 of the connecting nails 200a moves from the ejection passage 13a to the first passage section 21 side and retreats from the ejection passage 13a. The connecting nail 200a is exposed to the first passage section 21 and the second passage section 13b.

This allows the portion pulled out from the spirally wound portion of the connecting nail 200a to be removed from the first passage portion 21 and the second passage portion 13b, and the spirally wound portion of the connecting nail 200a to be detached from the fastener support portion 20a and removed from the storage portion 20.

<Example of nail driving operation of the nail driver according to the present embodiment>
Next, a description will be given of the operation of the nail driver 1A for driving the nail 200. As described above, when the nails 200 are loaded into the magazine 2 by the operation of moving the magazine 2 from the openable position P2 to the closed position P1, the leading nail 200 is positioned in the ejection passage 13a.

When driving a nail 200 with the nail gun 1A, the operator presses the contact portion 7 against the workpiece (not shown) and operates the trigger 6.

The valve stem 50 of the starting valve 5 is pressed by a combination of the operation of the trigger 6 and the operation of pressing the contact part 7 against the workpiece to be driven. When the valve stem 50 of the starting valve 5 moves from the standby position, the balance of the compressed air pressure applied to the pilot valve 51 changes, activating the pilot valve 51 and causing the pilot valve 51 to move from the standby position.

When the pilot valve 51 moves from the standby position, the main valve 4 opens due to a change in the balance between the compressed air pressure applied to the main valve 4 and the biasing force of the main valve spring 40.

When the main valve 4 opens, compressed air is supplied to the striking cylinder 30 of the striking section 3. When compressed air is supplied to the striking cylinder 30 of the striking section 3, the striking piston 31 to which the driver 32 is attached is pushed by air pressure and moves downward from the top dead center position to the bottom dead center position. When the striking piston 31 moves from the top dead center position to the bottom dead center position, the striking section 3 drives the nail 200 located in the injection passage 13a into the material to be driven with the driver 32.

When the striking piston 31 moves downward from the top dead center position during the action of driving the nail 200, air is supplied to the upper side of the striking piston 31, and the pressure in the blowback chamber 33 increases.

When the pressure in the blowback chamber 33 rises, the compressed air in the blowback chamber 33 is supplied to the feed cylinder 82 from the feed passage 84. This causes the feed member 80 connected to the feed piston 81 in the feed section 8 to move in the second direction away from the injection passage 13a.

When the magazine 2 is moved to the closed position P1, the restricting portion 86 moves to a movement restricting position P7 where the claw portion 86a protrudes from the hole portion 13c toward the surface side of the second passage portion 13b, as shown in FIG. 7B. When the feed member 80 moves in a direction away from the ejection passage 13a, the restricting portion 86 brings the nail 200 into contact with the restricting surface 86c of the claw portion 86a. As a result, the restricting portion 86 restricts the movement of the connecting nail 200a in a direction away from the ejection passage 13a.

When the feed member 80 moves away from the ejection passage 13a while the restricting portion 86 restricts the movement of the connecting nail 200a away from the ejection passage 13a, the claw portion 80a is pushed by the nail 200 and retracts from the second passage portion 13b by rotating around the shaft 80b. When the feed member 80 moves to a position where the claw portion 80a passes the leading nail 200, the claw portion 80a of the feed member 8 protrudes into the second passage portion 13b and engages with the next nail 200.

When the nail 200 has been driven, the operator moves the nail driver 1A away from the material being driven into. The operator also stops operating the trigger 6.

When the nail gun 1A moves away from the material to be driven in, the contact portion 7 moves away from the material to be driven in and returns to the standby position, or when the operation of the trigger 6 is terminated, the valve stem 50 of the starting valve 5 returns to the standby position. When the valve stem 50 of the starting valve 5 returns to the standby position, the balance of the compressed air pressure applied to the pilot valve 51 changes, and the pilot valve 51 returns to the standby position.

When the pilot valve 51 returns to its standby position, the main valve 4 closes due to a change in the balance between the compressed air pressure applied to the main valve 4 and the biasing force of the main valve spring 40.

When the main valve 4 closes, the supply of compressed air to the striking cylinder 30 is stopped, the air in the striking cylinder 30 is discharged, and the pressure in the striking cylinder 30 drops. When the pressure in the striking cylinder 30 drops, the compressed air in the blowback chamber 33 is supplied to the space below the striking piston 31, and the striking piston 31 moves to the top dead center position.

When compressed air is supplied from the blowback chamber 33 to the striking cylinder 30, the pressure in the blowback chamber 33 decreases.

When the compressed air in the blowback chamber 33 is supplied to the striking cylinder 30 and the pressure in the blowback chamber 33 drops, the air in the feed cylinder 82 flows into the blowback chamber 33 and is discharged via the striking cylinder 30, causing the air pressure in the feed cylinder 82 to drop. When the air pressure in the feed cylinder 82 drops, the air pressure applied to the feed piston 81 drops, and the feed member 80 connected to the feed piston 81 moves in a direction approaching the injection passage 13a due to the biasing member 85. When the feed member 80 moves in a direction approaching the injection passage 13a, the feed member 8 sends the next nail 200 engaged with the claw portion 80a to the injection passage 13a.

When the next nail 200 is sent to the ejection passage 13a, the next nail 200 of the connecting nails 200a comes into contact with the inclined surface 86d of the claw portion 86a of the restricting portion 86. As a result, the inclined surface 86d of the claw portion 86a of the restricting portion 86 is pushed by the nail 200 and the restricting portion 86 retreats from the second passage portion 13b. The restricting portion 86 sends the leading nail 200 of the connecting nails 200a until it is positioned in the ejection passage 13a, and when the nail 200 passes the claw portion 86a, the claw portion 86a protrudes into the second passage portion 13b, restricting the connecting nail 200a from moving in a direction away from the ejection passage 13a. This makes it possible to eject the next nail 200.

<Modifications of the nail driver according to the present embodiment>
9A and 9B are perspective views of the essential parts of an example of a nail driver according to a modified embodiment of the present invention, with Fig. 9A showing a state in which the cap part can be opened and Fig. 9B showing a state in which the cap part is closed and held in place.

In the nail gun 1A equipped with the holding part 25, the holding part 25 moves to an open position where it releases the holding of the cap part 22, and the holding part 25 retreats from the movement path of the engaged part 22e during the operation of opening the cap part 22. This reduces the amount of movement of the magazine 2 until the engaged part 22e and the engaging part 23c are disengaged. In addition, the force holding the cap part 22 in the closed state is distributed between the engagement of the engaged part 22e and the engaging part 23c and the force of the holding part 25 holding the cap part 22. Therefore, even if the length of the part where the engaged part 22e and the engaging part 23c engage is shortened, the force holding the cap part 22 in the closed state can be secured by the engagement of the engaged part 22e and the engaging part 23c. Therefore, by shortening the length of the engaged part 22e, the amount of movement of the magazine 2 until the engaged part 22e and the engaging part 23c are disengaged is reduced.

In contrast, the modified nail driver 1B does not have a retaining portion 25, and by lengthening the length of the engaged portion 22e, the length of the portion where the engaged portion 22e and the engaging portion 23c engage is increased, and the engagement between the engaged portion 22e and the engaging portion 23c ensures the force to hold the cap portion 22 in the closed state. Also, by not having a retaining portion 25, the number of moving parts can be reduced.

Figure 10 is a perspective view of the main part of an example of a nail driver of the second embodiment, and Figures 11A, 11B, 12A, and 12B are side views of the main part of an example of a nail driver of the second embodiment. In the nail driver 1C of the second embodiment, the same components as those in the nail driver 1A of the first embodiment are described with the same reference numerals. Also, Figures 11A and 11B show a state in which the restriction on the movement of the contact portion 7 is released depending on the position of the magazine 2, and Figures 12A and 12B show a state in which the movement of the contact portion 7 is restricted depending on the position of the magazine 2.

The nail gun 1C is provided with a contact restricting section 70 that restricts the movement of the contact section 7 according to the position of the magazine 2. The contact section 7 is movable in a third direction along the extension direction of the injection passage 13a from a third position in which the starting valve 5 is deactivated to a fourth position in which the starting valve 5 is activated, as shown in FIG. 4A, etc., and is also movable in a fourth direction opposite to the third direction from the fourth position to the third position. If the contact section 7 is moved to the standby position, the starting valve 5 will not be activated even if the trigger 6 is operated. For this reason, the third position is, for example, a standby position. However, the third position may be a position moved in the third direction from the standby position as long as it is within a range in which the starting valve 5 is deactivated even if the trigger 6 is operated. Also, if the contact section 7 is configured to be in a sign-in state in which the starting valve 5 is activated when it moves to the top dead center position, the fourth position is, for example, the top dead center position. However, a configuration is also conceivable in which the contact portion 7 moves from the third position in the third direction and enters the sign-in state at a position just before reaching the top dead center position. Therefore, the fourth position may be a position moved in the fourth direction from the top dead center position as long as it is within the range in which the sign-in state occurs. The contact portion 7 switches between a sign-off state in which the starting valve 5 is deactivated at the third position, and a sign-in state in which the starting valve 5 is operable by moving in the third direction from the third position to the fourth position. The contact restriction portion 70 restricts the movement of the contact portion 7 to the fourth position.

The contact restriction section 70 includes a contact restriction lever 71 and a biasing member 72 that biases the contact restriction lever 71. The contact restriction lever 71 is supported by the nose section 13 via a shaft 73 and rotates around the shaft 73 as a fulcrum. The axial direction in which the shaft 73 extends is a direction that intersects with the direction in which the magazine 2 moves.

The contact portion 7 has an engaged portion 7b that engages with the contact restriction lever 71. The engaged portion 7b is configured at a portion of the contact portion 7 that is located on the outer periphery of the nose portion 13 that covers the ejection passage 13a. The magazine 2 has an engaging portion 2a that activates the contact restriction lever 71. The engaging portion 2a is configured at a portion of the magazine 2 that is supported by the magazine support portion 24. The engaging portion 2a moves integrally with the magazine 2 along the magazine support portion 24 in directions away from and toward the nose portion 13.

The nail gun 1C has a moving path 7a through which the engaged part 7b passes. The moving path 7a is formed on the outer periphery of the nose part 13 covering the ejection passage 13a at a portion along the extension direction of the ejection passage 13a. The engaged part 7b passes through the moving path 7a when the contact part 7 moves in the third direction from the third position to the fourth position and when it moves in the fourth direction from the fourth position to the third position. The nail gun 1C also has a moving path 24a through which the engaging part 2a passes. The moving path 24a is formed at a portion along the moving direction of the magazine 2 which moves under the guidance of the magazine support part 24. The engaging part 2a passes through the moving path 24a when the magazine 2 moves in the first direction from the closed position P1 to the openable position P2 and when it moves in the second direction from the openable position P2 to the closed position P1.

The contact restriction lever 71 has a protruding portion 71a that protrudes and retracts relative to the movement path 7a of the contact portion 7 and is capable of engaging with the engaged portion 7b of the contact portion 7, and an engaged portion 71b that protrudes and retracts relative to the movement path 24a of the magazine 2 and is capable of engaging and disengaging with the engaging portion 2a of the magazine 2. The protruding portion 71a is shaped to extend from a portion supported by the shaft 73 in one direction that intersects with the shaft 73. The engaged portion 71b is shaped to extend from a portion supported by the shaft 73 in another direction that intersects with the shaft 73 and is different from the one direction.

In this example, the contact restriction lever 71 is configured so that the protruding portion 71a and the engaged portion 71b move in the same direction along the movement direction of the magazine 2. Therefore, for example, the angle between the extending direction of the protruding portion 71a and the extending direction of the engaged portion 71b of the contact restriction lever 71 is an acute angle. As a result, when the protruding portion 71a rotates about the shaft 73 as a fulcrum in the direction of the arrow C1 from the outside of the movement path 7a toward the movement path 7a, the protruding portion 71a and the engaged portion 71b move in the same direction of the arrow C1. Also, when the protruding portion 71a rotates about the shaft 73 as a fulcrum in the direction of the arrow C2 from the movement path 7a toward the outside of the movement path 7a, the protruding portion 71a and the engaged portion 71b move in the same direction of the arrow C2.

The contact restriction lever 71 moves between a restriction position where the movement of the contact portion 7 is restricted and a restriction release position where the restriction on the movement of the contact portion 7 is released by rotating around the shaft 73. That is, the contact restriction lever 71 moves to the restriction position by rotating from the restriction release position in the direction of the arrow C1. When the contact restriction lever 71 moves to the restriction position, the direction in which the protrusion 71a extends becomes the same as the direction in which the contact portion 7 moves, and the protrusion 71a moves to a position where it protrudes into the movement path 7a. When the protrusion 71a protrudes into the movement path 7a, for example, even if the contact portion 7 tries to move from the third position to the third direction by pressing the contact portion 7 against a driven material (not shown), the engaged portion 7b of the contact portion 7 abuts against the protrusion 71a, and the movement of the contact portion 7 to the fourth position is restricted. Also, when the contact restriction lever 71 rotates in the same direction, the engaged portion 71b moves to a position where it protrudes into the movement path 24a.

In response to this, the contact restriction lever 71 moves from the restriction position to the release position by rotating in the direction of the arrow C2. When the contact restriction lever 71 moves to the release position, the direction in which the protrusion 71a extends becomes inclined relative to the direction in which the contact portion 7 moves, and the protrusion 71a moves to a position where it retreats outward from the movement path 7a. When the protrusion 71a retreats outward from the movement path 7a, for example, when the contact portion 7 moves from the third position to the third direction by pressing the contact portion 7 against a driven material (not shown), the engaged portion 7b of the contact portion 7 does not abut against the protrusion 71a, and the restriction on the movement of the contact portion 7 to the fourth position is released. Also, when the contact restriction lever 71 rotates in the same direction, the engaged portion 71b moves to a position where it retreats outward from the movement path 24a.

The biasing member 72 is composed of a torsion coil spring or the like, and biases the contact restriction lever 71 in the direction of arrow C1.

When the magazine 2 moves from the closed position P1 to the openable position P2, and from the openable position P2 to the closed position P1, the engagement portion 2a moves along the movement path 24a.

When the magazine 2 moves in the second direction from the openable/closable position P2 to the closed position P1, the engaging portion 2a moves in a direction approaching the engaged portion 71b of the contact restriction lever 71. As a result, when the magazine 2 moves to the closed position P1, the engaging portion 2a engages with the engaged portion 71b of the contact restriction lever 71.

In addition, when the magazine 2 moves in the first direction from the closed position P1 to the openable position P2, the engaging portion 2a moves in a direction away from the engaged portion 71b of the contact restriction lever 71. As a result, when the magazine 2 moves to the openable position P2, the engaging portion 2a is disengaged from the engaged portion 71b of the contact restriction lever 71.

Next, we will explain the operation of switching whether or not to restrict the movement of the contact portion 7 depending on the position of the magazine 2 in the nail driver 1C of the second embodiment. In the nail driver 1C, the magazine 2 moves from the openable position P2 to the closed position P1, and the engaging portion 2a of the magazine 2 engages with the engaged portion 71b of the contact restricting lever 71.

When the engaging portion 2a of the magazine 2 engages with the engaged portion 71b of the contact restriction lever 71, the magazine 2 moves from the openable/closable position P2 to the closed position P1, and the engaged portion 71b is pushed in a direction retracting outward from the movement path 24a.

When the engaged portion 71b is pushed in a direction retracting outward from the movement path 24a, the contact restriction lever 71 rotates in the direction of arrow C2 with the shaft 73 as a fulcrum. As a result, when the magazine 2 moves to the closed position P1, the contact restriction lever 71 moves to a release position where the protruding portion 71a retracts outward from the movement path 7a, as shown in FIG. 11A. Therefore, when the contact portion 7 is pressed against the workpiece (not shown) and moves from the third position in the third direction, the engaged portion 7b of the contact portion 7 does not come into contact with the protruding portion 71a, and the contact portion 7 can move to a fourth position where a sign-in is possible to operate the starting valve 5.

Therefore, when the magazine 2 has moved to the closed position P1, the contact portion 7 is pressed against the workpiece (not shown), causing the contact portion 7 to move upward and enter a signed-in state, as shown in FIG. 11B. When the trigger 6 is further operated, the operation of the contact portion 7 and the operation of the trigger 6 work together to operate the start valve 5, allowing the nail to be driven.

In response to this, in the nail gun 1C, when the magazine 2 moves from the closed position P1 to the openable position P2, the engaging portion 2a of the magazine 2 separates from the engaged portion 71b of the contact restriction lever 71, and the engagement between the engaged portion 71b and the engaging portion 2a is released.

When the contact restriction lever 71 moves in a direction in which the engaging portion 2a of the magazine 2 moves away from the engaged portion 71b, the engaged portion 71b becomes rotatable in a direction in which it protrudes into the movement path 24a.

As a result, when the magazine 2 moves from the closed position P1 to the openable position P2, the contact restricting lever 71 rotates in the direction of the arrow C1 around the shaft 73 as a fulcrum due to the bias of the biasing member 72. Therefore, when the magazine 2 moves to the openable position P2, the contact restricting lever 71 moves to a restricting position where the protrusion 71a protrudes into the movement path 7a, as shown in FIG. 12A. Therefore, when the contact portion 7 tries to move from the third position in the third direction by pressing the contact portion 7 against the driven material (not shown), the engaged portion 7b of the contact portion 7 abuts against the protrusion 71a, and the movement of the contact portion 7 to the fourth position is restricted.

As described above, when the magazine 2 moves from the closed position P1 to the openable position P2, the feed member 80 moves from the feed operation position P5 to the retracted position P6. When the feed member 80 moves to the retracted position P6, the leading nail 200 of the linked nails 200a engaged with the feed member 80 moves from the ejectable position P3 to the removable position P4. As a result, when the magazine 2 moves to the openable position P2, the leading nail 200 of the linked nails 200a moves to a position where it will not be driven in even if the driver 32 moves.

Consider a case in which the magazine 2 has moved to the openable position P2 and the leading nail 200 of the linked nails 200a has moved to a position where it will not be driven in even if the driver 32 moves, and the operation to move the contact portion 7 results in a sign-in state. In this case, when the trigger 6 is further operated, the start valve 5 is actuated and the striking portion 3 performs an operation to strike the nail 200. When the striking operation is performed in this way without the nail 200 being present in the path of movement of the driver 32, this is known as blank striking. In a nail gun, blank striking can cause an overload to be placed on the striking portion 3, nose portion 13, etc.

Therefore, when the magazine 2 moves to the openable position P2, the contact restriction lever 71 is moved to the restriction position to restrict the movement of the contact portion 7. As a result, when the magazine 2 moves to the openable position P2, even if the contact portion 7 is pressed against a workpiece (not shown), the movement of the contact portion 7 is restricted as shown in FIG. 12B. Therefore, the sign-in state is not reached by an operation to move the contact portion 7, and the start valve 5 is not activated even if the trigger 6 is operated. Therefore, it is possible to prevent malfunctions of the nail gun 1C, such as blank driving. Note that when the magazine 2 moves to the openable position P2 and the trigger 6 is operated, the sign-in state is reached. However, since the movement of the contact portion 7 is restricted, the start valve 5 is not activated by an operation to move the contact portion 7. Therefore, it is possible to prevent malfunctions of the nail gun 1C, such as blank driving.

When the contact restriction lever 71 is in the restricted position, the contact portion 7 may move within a range that does not result in a sign-in state even if the contact portion 7 is pressed against the workpiece (not shown).

In addition, the contact restriction lever 71 is configured to rotate around the shaft 73 as a fulcrum, but it may also be configured to move between the restriction position and the release position in a linear motion along the movement direction of the magazine 2.

1A, 1B, 1C... nail gun, 10... main body, 11... barrel, 12... handle, 13... nose, 13a... ejection passage, 13b... second passage, 13d... ejection port, 2... magazine (supply section, evacuation section), 2a... engagement section, 20... storage section, 20a... fastener support section, 20b... support shaft, 20c... shaft support section, 20d... wall section, 20e... biasing member, 21... first passage, 22... cap section, 22a... first section, 22b... second 2 part, 22c...shaft, 22d...wall part, 22e...engaged part, 23...door part, 23a...shaft, 23b...shaft support part, 23c...engaging part, 23d...door operation part, 24...magazine support part (supply part, retraction part), 24a...movement path, 25...pressing part, 25a...shaft, 25b...urging member, 25c...acting part, 26...operation part, 26a...shaft, 27...holding part, 27a...first engaging recess, 27b...second engaging recess, 27c...shaft, 28... Auxiliary operating unit, 3... striking unit, 30... striking cylinder, 31... striking piston, 32... driver, 33... blowback chamber, 4... main valve, 40... main valve spring, 5... starting valve, 50... valve stem, 51... pilot valve, 6... trigger, 7... contact unit, 7a... moving path, 7b... engaged unit, 70... contact regulation unit, 71... contact regulation lever, 71a... protruding unit, 71b... engaged unit, 72 ... biasing member, 73... shaft, 8... feed section (supply section, evacuation section), 80... feed member, 80a... claw section, 81... feed piston, 82... feed cylinder, 83... switching section, 83a... switching cylinder, 83b... switching valve, 83c... outlet, 83d... sealing material, 84... feed flow path, 85... biasing member, 86... regulating section, 86a... claw section, 86b... shaft, 86c... regulating surface, 86d... inclined surface, 200... nail, 200a... connecting nail

Claims (13)

A main body portion,
a magazine having a storage section in which fasteners are stored and a cap section for opening and closing the storage section, the magazine being movable in a first direction toward the main body section and in a second direction away from the main body section;
the main body portion has an engagement portion that is engageable with the cap portion when the cap portion is in a closed state,
The cap portion engages with the engagement portion when the magazine moves in the first direction, and disengages from the engagement portion when the magazine moves in the second direction from a state engaged with the engagement portion. the body portion has a nose portion including an injection passage through which a fastener is dispensed;
The driving tool according to claim 1 , wherein the magazine is supported so as to be slidable relative to the nose portion in the first direction and the second direction. The driving tool according to claim 2 , wherein the magazine has a biasing member that biases the cap portion in a direction in which the cap portion is opened. A feed section that feeds a fastener to the injection passage,
the feed portion has a feed member that engages with the fastener and feeds the fastener in the first direction;
The driving tool according to claim 3 , wherein the feed member is exposed to the outside when the cap portion is in an open state. The driving tool according to claim 4 , wherein the feed member is linked to the movement of the magazine. The driving tool according to claim 5 , wherein the magazine movably supports the feed section. The driving tool according to claim 2 , wherein the magazine has a passage portion that is connected to the injection passage when the magazine moves in the first direction and is separated from the injection passage when the magazine moves in the second direction. the nose portion has a second passage portion communicating with the injection passage and through which a fastener passes;
3. The driving tool according to claim 2, wherein the magazine has a first passage portion through which a fastener passes, the first passage portion being connected to the second passage portion when moved in the first direction and being separated from the second passage portion when moved in the second direction. the nose portion has a pressing portion that further presses the closed cap portion,
The driving tool according to claim 2 , wherein the pressing portion moves in conjunction with the movement of the magazine between a pressing position where the pressing portion presses the cap portion and a release position where the pressing portion is released from the cap portion. an operation unit that receives an operation to move the magazine;
The driving tool according to claim 1 , wherein the operating portion includes a holding portion that holds a position of the magazine. The driving tool according to claim 10 , wherein when the operation portion receives a force for moving the magazine in a second direction, the holding portion releases the magazine from its position being held. A striking section that strikes the fastener by supplying compressed air;
a main valve for switching on and off the supply of compressed air to the striking section;
a starting valve for actuating the main valve;
a contact portion that is movable from a third position that deactivates the starting valve to a fourth position that activates the starting valve, and that switches between a sign-in state that activates the starting valve by moving from the third position to the fourth position, and a sign-off state that deactivates the starting valve at the third position;
The driving tool according to claim 2 , further comprising a contact restricting portion that restricts movement of the contact portion to the fourth position depending on a position of the magazine. The driving tool of claim 12, further comprising a contact restricting lever that protrudes into a movement path of the contact portion from the third position to the fourth position when the magazine moves in the second direction, thereby restricting the movement of the contact portion, and that retracts from the movement path of the contact portion when the magazine moves in the first direction, thereby releasing the restriction on the movement of the contact portion.

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