Driving tool

Abstract

The objective is to provide a press tool that allows for a relaxation of the positional accuracy requirements for parts. [Solution] The nail gun 1A includes a striking cylinder 30 that moves a striking piston 30a in the axial direction along the vertical direction, a main chamber 13 that stores compressed air, a main valve section 5 that opens and closes the communication between the striking cylinder 30 and the main chamber 13, a trigger valve section 6 having a pilot valve 60 that operates the main valve section 5 and a trigger valve upper stem 61 that controls the intake and exhaust of compressed air and switches whether or not the pilot valve 60 is operated, a trigger section 7 that operates the trigger valve section 6, and a trigger valve lower stem 62 that receives operation from the trigger section 7 and operates the trigger valve upper stem 61.

Description

Technical Field

[0001] The present disclosure relates to a driving tool for driving a consumable into a driving material.

Background Art

[0002] Conventionally, for a driving tool that drives out consumables such as screws and nails, the opening and closing of the main valve is controlled by the intake and exhaust of air by operating a trigger valve. The driving tool has a striking cylinder provided in the main body portion, and a main valve is provided above the striking cylinder, that is, above the main body portion. On the other hand, the trigger valve is configured to operate in response to the operation of the trigger by an operator and is provided in the handle portion (see, for example, Patent Document 1).

[0003] On the other hand, a driving tool has been proposed in which the trigger valve is provided above the main body portion and a trigger valve stem for operating the trigger valve is extended to the trigger portion (see, for example, Patent Document 2).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, when the trigger valve is provided in the handle portion, the length of the flow path from the trigger valve to the main valve becomes long, so the time required for intake and exhaust becomes long, and the response of the operation deteriorates.

[0006] Furthermore, if the trigger valve stem is extended to the trigger section, allowing the trigger valve stem to be operated directly from the trigger section, then high-precision alignment is required to ensure that the extended trigger valve stem contacts a predetermined part of the trigger section, which necessitates high precision in the dimensions of the components. As a result, productivity suffers.

[0007] This disclosure was made to solve these problems and aims to provide a press tool that allows for a relaxation of the positional accuracy requirements for parts. [Means for solving the problem]

[0008] To solve the above-mentioned problems, the present disclosure provides a striking tool comprising: a main chamber for storing compressed air; a striking cylinder for moving a striking piston axially along the vertical direction by being supplied with compressed air stored in the main chamber; a main valve section for opening and closing communication between the striking cylinder and the main chamber; a trigger valve section for operating the main valve section; and a first stem that is operated in response to an operation. The trigger valve section comprises a pilot valve for operating the main valve section and a second stem for controlling the intake and exhaust of compressed air to switch whether or not the pilot valve is operated. The first stem is a striking tool for operating the second stem.

[0009] In this disclosure, when the first stem is operated and the second stem is activated, the second stem controls the intake and exhaust of compressed air, switching the operation of a pilot valve that operates the main valve section. When the pilot valve is activated, the main valve section opens, and the striking cylinder and the main chamber come into communication.

[0010] Furthermore, this disclosure relates to a driving tool comprising a main body extending in the vertical direction, a main chamber for storing compressed air, a striking cylinder that moves a striking piston axially when compressed air stored in the main chamber is supplied, a main valve section for opening and closing the communication between the striking cylinder and the main chamber, a trigger valve section for operating the main valve section, and a cylinder cap attached to the main body and covering the upper side of the main body, wherein the main valve section and the trigger valve section are housed in the cylinder cap. [Effects of the Invention]

[0011] In this disclosure, the first stem that receives the operation and the second stem of the trigger valve section are composed of separate parts, thereby reducing the positional accuracy required when assembling the trigger valve section to the main body.

[0012] Furthermore, this disclosure allows for the supply of a cylinder cap with the main valve section and trigger valve section assembled into it as an assembled part. [Brief explanation of the drawing]

[0013] [Figure 1] This is a side cross-sectional view showing an example of a nail gun according to this embodiment. [Figure 2] This is an external side view showing an example of a nail gun according to this embodiment. [Figure 3] This is a side cross-sectional view of a key part showing an example of a nail gun according to this embodiment. [Figure 4] This is a perspective view of the main valve section and trigger valve section, showing an example of a nail gun according to this embodiment. [Figure 5] This is a side cross-sectional view of the main valve section, showing an example of a nail gun according to this embodiment. [Figure 6] This is a side cross-sectional view of the main part of the trigger valve section, showing an example of a nail gun according to this embodiment. [Figure 7] This is a side cross-sectional view of the main part of the trigger valve section, showing an example of a nail gun according to this embodiment. [Figure 8] This is a cross-sectional view of a key part showing an example of the operation of the nail gun of this embodiment. [Figure 9] It is a cross-sectional view of the main part showing an example of the operation of the nail driver of the present embodiment. [Figure 10] It is a cross-sectional view of the main part showing an example of the operation of the nail driver of the present embodiment. [Figure 11] It is a cross-sectional view of the main part showing an example of the operation of the nail driver of the present embodiment. [Figure 12] It is a cross-sectional view of the main part showing the first modification example of the nail driver of the present embodiment. [Figure 13] It is a cross-sectional view of the main part showing an example of the operation of the nail driver of the first modification example of the present embodiment. [Figure 14] It is a cross-sectional view of the main part showing the second modification example of the nail driver of the present embodiment. [Figure 15] It is a cross-sectional view of the main part showing an example of the operation of the nail driver of the second modification example of the present embodiment. [Figure 16] It is a cross-sectional view of the main part showing the third modification example of the nail driver of the present embodiment. <00,00092> [Figure 17] It is a cross-sectional view of the main part showing the third modification example of the nail driver of the present embodiment.

Mode for Carrying Out the Invention

[0014] Hereinafter, with reference to the drawings, an embodiment of a nail driver as an example of a driving tool of the present invention will be described. <00,00100>

[0015] <Configuration Example of the Nail Driver of the Present Embodiment> FIG. 1 is a side cross-sectional view showing an example of the nail driver of the present embodiment, FIG. 2 is an external side view showing an example of the nail driver of the present embodiment, and FIG. 3 is a cross-sectional view of the main part showing an example of the nail driver of the present embodiment. Further, FIG. 4 is a perspective view of the main part of the main valve part and the trigger valve part showing an example of the nail driver of the present embodiment, and FIG. 5 is a cross-sectional view of the main part of the main valve part showing an example of the nail driver of the present embodiment. Furthermore, FIGS. 6 and 7 are cross-sectional views of the main part of the trigger valve part showing an example of the nail driver of the present embodiment.

[0016] The nail gun 1A uses compressed air pressure to move the driver 2 axially. By moving the driver 2 axially, the nail gun 1A drives nails (not shown), which are consumables, into the material to be driven.

[0017] The nail gun 1A comprises a main body 10. The main body 10 extends vertically along the axial direction of the driver 2. The nail gun 1A is designed to be used by a person holding it by hand, and the main body 10 is equipped with a handle 11.

[0018] The nail gun 1A has a handle portion 11 located near the middle of the main body portion 10 along its extension direction. The handle portion 11 extends in a direction that intersects with the main body portion 10, which extends in the vertical direction. The main body portion 10 is made of resin for its exterior, and the handle portion 11 is integrally formed with the main body portion 10. The nail gun 1A also has a nose portion 12. The nose portion 12 of the nail gun 1A is attached to one side of the main body portion 10 along its extension direction.

[0019] As shown in Figure 1 and other diagrams, the nail gun 1A is illustrated with the nose portion 12 facing downwards. One side along the extension direction of the main body portion 10, which is the direction in which nails are driven (not shown), is referred to as the lower side, and the other side along the extension direction of the main body portion 10 is referred to as the upper side. In the nail gun 1A, the downward direction is indicated by arrow D. Also, in the nail gun 1A, the upward direction, opposite to the downward direction, is indicated by arrow U. The driver 2 has its axial direction aligned with the vertical direction and moves downwards and upwards.

[0020] The nose section 12 includes an injection passage 12a into which nails are supplied, and an injection port 12b from which the nails supplied to the injection passage 12a are ejected.

[0021] The injection passage 12a extends along the vertical direction in which the driver 2 moves. The injection port 12b is formed by providing an opening at the lower end of the injection passage 12a along its extending direction.

[0022] The nail gun 1A comprises a main chamber 13 to which compressed air is supplied from an external air compressor (not shown), a main chamber housing 13a constituting the main chamber 13, and an exhaust chamber 14 for exhausting the compressed air. The nail gun 1A also comprises a driving section 3 for driving nails into the material to be driven. The driving section 3 comprises a striking cylinder 30 to which compressed air is supplied from the main chamber 13 and which moves the driver 2 in the axial direction, and a striking piston 30a which moves with the air pressure of the compressed air supplied to the striking cylinder 30.

[0023] The striking cylinder 30 is a cylindrical member that extends vertically and has open upper and lower ends, and is installed inside the main body 10.

[0024] The striking cylinder 30 has a striking piston 30a inside. The striking piston 30a is made up of a disc shape, a cylindrical shape, or the like, which allows it to move inside the striking cylinder 30 in the vertical direction. The striking piston 30a is mounted in such a way that the driver 2 protrudes downward.

[0025] In the nail gun 1A, the driver 2 moves along the axial direction in the directions of arrows D and U as the striking piston 30a moves vertically inside the striking cylinder 30.

[0026] As a result, the nail gun 1A uses the air pressure of compressed air supplied to the striking cylinder 30 to move the striking piston 30a along the axial direction downward, as indicated by arrow D, thereby driving the nail into the material to be driven.

[0027] The striking cylinder 30 is equipped with a lower bumper 30e at its axial lower end. The lower bumper 30e is made of an annular elastic body and is exposed to the opening at the lower end of the striking cylinder 30, with a shape that allows the striking piston 30a to contact it. The striking piston 30a is movable downward to a position where it contacts the lower bumper 30e. The bottom dead center position of the striking piston 30a and the driver 2 is when the striking piston 30a contacts the lower bumper 30e. The lower bumper 30e is configured to be elastically deformable, and the bottom dead center position of the striking piston 30a and the driver 2 moves within the range in which the lower bumper 30e can be elastically deformed.

[0028] In the nail gun 1A, a supply channel 13c is formed around the outer circumference near the upper end of the striking cylinder 30, between the opening at the upper end of the striking cylinder 30 and the main chamber 13, through which compressed air supplied from the main chamber 13 to the striking cylinder 30 passes. The striking cylinder 30 is provided with a supply channel sealing portion 30c on its outer circumference near the upper end. The supply channel sealing portion 30c is made of an elastic material, such as an O-ring, and is fitted into a groove provided on the outer circumference near the upper end of the striking cylinder 30, with a portion of it protruding from the outer surface of the striking cylinder 30.

[0029] The striking cylinder 30 is housed in the space inside the main body 10. The main body 10 has an opening at the top, and when the striking cylinder 30 is housed there, the upper part of the striking cylinder 30 is exposed upward through this opening at the top.

[0030] The nail gun 1A is equipped with a cylinder cap 32. The cylinder cap 32 is made of a separate part from the main body 10 and is attached to the top of the main body 10. The cylinder cap 32 is shaped to cover the opening at the top of the main body 10, and when attached to the top of the main body 10, it houses the upper part of the striking cylinder 30.

[0031] The cylinder cap 32 is equipped with an upper bumper 30f at the upper axial end of the striking cylinder 30. The upper bumper 30f is made of a circular elastic body and is shaped to allow contact with the striking piston 30a. The upper bumper 30f is attached to the inner surface of the upper part of the cylinder cap 32 and faces the opening at the upper axial end of the striking cylinder 30. The striking piston 30a is movable upward to a position where it contacts the upper bumper 30f. The top dead center position of the striking piston 30a and the driver 2 is when the striking piston 30a contacts the upper bumper 30f. The upper bumper 30f is configured to be elastically deformable, and the top dead center position of the striking piston 30a and the driver 2 moves within the range in which the upper bumper 30f can be elastically deformed.

[0032] The upper bumper 30f is provided with an exhaust passage sealing portion 30g on its outer circumference. The exhaust passage sealing portion 30g is integrally formed on the outer circumference of the upper bumper 30f, which is an elastic material.

[0033] The main chamber 13 is shaped such that the main chamber housing 13a covers the upper periphery of the striking cylinder 30, and is provided on the outer circumference of the striking cylinder 30 within the handle portion 11, the main body portion 10 connected to the handle portion 11, and the main chamber housing 13a. The main chamber housing 13a is mounted on the upper side of the main body portion 10 and inside the cylinder cap 32. The exhaust chamber 14 is a space formed around the main chamber housing 13a and inside the cylinder cap 32, and constitutes a flow path connecting the opening at the upper end of the striking cylinder 30 and an exhaust hole (not shown) provided in the main body portion 10.

[0034] Furthermore, the nail gun 1A is equipped with a blowback chamber 33 that returns the striking piston 30a, which has moved to the bottom dead center position, to the top dead center position.

[0035] The nail gun 1A includes a main valve unit 5 that switches whether or not compressed air is supplied to the striking cylinder 30, a trigger valve unit 6 that operates the main valve unit 5, and a trigger unit 7 that operates the trigger valve unit 6. The nail gun 1A also includes a contact unit 8 that allows the trigger valve unit 6 to be operated in cooperation with the operation of the trigger unit 7. Furthermore, the nail gun 1A includes a feed unit 9 that feeds nails (not shown), which are consumables, to the nose unit 12, and a magazine 90 that stores the nails fed by the feed unit 9.

[0036] The main valve section 5 includes a head valve 50 that opens and closes the communication between the main chamber 13 and the striking cylinder 30, a control chamber 51 that controls the opening and closing of the head valve 50 by exhausting compressed air, and a main valve biasing member 52 that biases the head valve 50. The main valve section 5 also includes a main valve housing 53 that supports the head valve 50 and the like.

[0037] The head valve 50 is provided around the vicinity of the upper end of the striking cylinder 30. The main valve housing 53 is shaped to cover the outer circumference of the head valve 50. The head valve 50 is mounted inside the main valve housing 53 and is supported so as to be movable in the vertical direction relative to the main valve housing 53. The main valve section 5 is also provided with a control chamber 51 in the main valve housing 53. When the head valve 50 is mounted inside the main valve housing 53, the control chamber 51 is formed inside the main valve housing 53 and around the head valve 50.

[0038] The main valve biasing member 52 is composed of, for example, a coil spring and is provided on the outside of the main valve housing 53. In this example, the main valve biasing member 52 biases the head valve 50 in the closing direction.

[0039] The main valve housing 53, to which the head valve 50 and the main valve biasing member 52 are assembled, is housed in the cylinder cap 32 and mounted on the upper part of the main body 10. As a result, the main valve section 5 has the head valve 50 located in the upper part of the main body 10. In addition, the control chamber 51 of the main valve section 5 is located in the upper part of the main body 10, around the head valve 50.

[0040] When the head valve 50 of the main valve section 5 moves downward, the head valve 50 comes into contact with the supply passage sealing section 30c, closing the supply passage 13c and preventing the striking cylinder 30 and the main chamber 13 from communicating. When the head valve 50 of the main valve section 5 moves upward, the head valve 50 moves away from the supply passage sealing section 30c, opening the supply passage 13c, and the head valve 50 comes into contact with the exhaust passage sealing section 30g, sealing the space between the striking cylinder 30 and the exhaust chamber 14, and enabling communication between the striking cylinder 30 and the main chamber 13.

[0041] The trigger valve section 6 includes a pilot valve 60 for opening and closing the control chamber 51, and an upper trigger valve stem 61 for operating the pilot valve 60. The nail gun 1A also includes a lower trigger valve stem 62 for operating the upper trigger valve stem 61. The following examples are embodiments of the present disclosure, and it is sufficient that the pilot valve 60 can be operated; the positions of each sealing part and the exhaust position configuration are not limited to these embodiments. For example, the sealing part is not limited to an O-ring. Furthermore, the position where the sealing part, such as an O-ring, is provided may be on the inner circumferential surface side of a cylindrical member, rather than on the outer circumference of an axial member. Moreover, a configuration in which a predetermined airtightness can be maintained by contact between resin parts without the use of an elastic body is also possible.

[0042] The pilot valve 60 extends vertically, and a flange portion 60a is provided on the outer circumference of the lower end, projecting outward from the outer surface. The pilot valve 60 also has an internal space connecting the upper end surface to the lower end surface, with both the upper and lower end surfaces being open. A ventilation portion 60b is formed at the opening on the upper end surface of the pilot valve 60.

[0043] The pilot valve 60 is provided with a first sealing portion 60c on the outer circumference of the flange portion 60a, and a second sealing portion 60d and a third sealing portion 60e on the upper end side. The first sealing portion 60c is made of an elastic O-ring and is fitted into a groove provided on the outer circumference of the flange portion 60a, with a portion of it protruding from the outer circumference of the flange portion 60a. The second sealing portion 60d is made of an elastic O-ring and is fitted into a groove provided on the outer circumference of the pilot valve 60, with a portion of it protruding from the outer circumference of the upper end side of the pilot valve 60. The third sealing portion 60e is made of an elastic O-ring and is fitted into a groove provided on the outer circumference of the pilot valve 60, below the second sealing portion 60d, with a portion of it protruding from the outer circumference of the upper end side of the pilot valve 60.

[0044] In the pilot valve 60, a first support portion 60f is formed in the upper internal space on the ventilation portion 60b side, which supports the trigger valve upper stem 61. In addition, between the lower end of the pilot valve 60 and the first support portion 60f, an enlarged diameter portion 60g is formed, which has a wider inner diameter than the first support portion 60f.

[0045] The pilot valve 60 is provided with a supply hole 60h. The supply hole 60h is a hole that penetrates from the outer circumferential surface of the pilot valve 60 to the inner circumferential surface of the first support portion 60f at the position where the enlarged diameter portion 60g is formed.

[0046] The trigger valve upper stem 61 is an example of a second stem, extending in the vertical direction, and a flange portion 61a is provided on the outer circumference of the lower end, projecting outward from the outer surface.

[0047] The trigger valve upper stem 61 is provided with a fourth sealing portion 61b between the flange portion 61a and the upper end, and a fifth sealing portion 61c on the upper end. The fourth sealing portion 61b is made of an elastic O-ring and is fitted into two grooves provided on the outer circumference of the trigger valve upper stem 61, with a portion of it protruding from the outer circumference between the flange portion 61a and the upper end. The fifth sealing portion 61c is made of an elastic O-ring and is fitted into a groove provided on the outer circumference of the trigger valve upper stem 61, with a portion of it protruding from the outer circumference of the upper end of the trigger valve upper stem 61.

[0048] The first support portion 60f of the pilot valve 60 is a hole with a diameter that allows the fifth sealing portion 61c to make contact. The enlarged diameter portion 60g of the pilot valve 60 is a hole with a diameter that forms a gap between the inner surface of the enlarged diameter portion 60g and the fourth sealing portion 61b through which air can pass.

[0049] As a result, the trigger valve upper stem 61 can be inserted into the enlarged diameter portion 60g and the first support portion 60f of the pilot valve 60, and the fifth sealing portion 61c can slide in contact with the inner surface of the first support portion 60f. When the fifth sealing portion 61c slides in contact with the inner surface of the first support portion 60f, the space between the upper and lower spaces of the fifth sealing portion 61c is sealed inside the pilot valve 60. In addition, when the trigger valve upper stem 61 is inserted into the enlarged diameter portion 60g, air passes between the inner surface of the enlarged diameter portion 60g and the fourth sealing portion 61b.

[0050] The trigger valve lower stem 62 is an example of the first stem, and is provided below the trigger valve upper stem 61 and below the trigger valve portion 6. The trigger valve lower stem 62 extends in the vertical direction, and a flange portion 62a is provided on the outer circumference of its upper end, projecting outward from the outer surface. In addition, the trigger valve lower stem 62 is provided on the outer circumference of its intermediate portion, projecting outward from the outer surface, with a position-restricting flange portion 62b.

[0051] The trigger valve section 6 includes a trigger valve housing 63. The trigger valve housing 63 comprises a first trigger valve housing 63d which constitutes the upper part of the trigger valve housing 63, a second trigger valve housing 63e which constitutes the lower part of the trigger valve housing 63, and a sleeve 63f which is inserted into the first trigger valve housing 63d and the second trigger valve housing 63e. The trigger valve housing 63 extends vertically when the upper part of the sleeve 63f is inserted into the first trigger valve housing 63d and the lower part of the sleeve 63f is inserted into the second trigger valve housing 63e and integrated. The trigger valve housing 63 has an internal diameter corresponding to the internal shapes of the first trigger valve housing 63d, the second trigger valve housing 63e and the sleeve 63f, with a space formed inside that extends from the upper end surface to the lower end surface, and the upper end surface and lower end surface are open.

[0052] The trigger valve housing 63 has an exhaust portion 63a formed at an opening on the upper end surface of the first trigger valve housing 63d. The exhaust portion 63a is a hole of a diameter into which the upper end of the pilot valve 60 can be inserted and into which the second sealing portion 60d can make contact from the inside of the first trigger valve housing 63d.

[0053] Furthermore, the trigger valve housing 63 has a second support portion 63b formed at the opening on the lower end surface of the second trigger valve housing 63e. The second support portion 63b is a hole of a diameter into which the trigger valve upper stem 61 can be inserted and into which the fourth sealing portion 61b can contact and slide.

[0054] Furthermore, the trigger valve housing 63 has a pilot valve support portion 63c formed in the space inside the first trigger valve housing 63d, the second trigger valve housing 63e, and the sleeve 63f. The pilot valve support portion 63c has a hole of a diameter into which the flange portion 60a of the pilot valve 60 can be inserted and into which the first sealing portion 60c can contact and slide, a hole of a diameter into which the shaft portion of the pilot valve 60 can be inserted, and an exhaust portion 63a connected thereto. The pilot valve support portion 63c has a hole formed in the second trigger valve housing 63e into which the flange portion 60a of the pilot valve 60 is inserted, and a hole formed in the sleeve 63f into which the shaft portion of the pilot valve 60 is inserted. The trigger valve housing 63 has a sealing projection 63g into which the third sealing portion 60e contacts. The sealing projection 63g is configured by providing a projection that protrudes inward along the circumferential direction at a predetermined position in the vertical direction on the inner surface of the sleeve 63f. The sealing projection 63g forms a hole with a diameter that allows the third sealing portion 60e to contact and slide. When the pilot valve 60 moves to a position where the third sealing portion 60e contacts the sealing projection 63g, the space between the upper and lower parts of the third sealing portion 60e in the pilot valve support portion 63c is sealed by the third sealing portion 60e.

[0055] The trigger valve section 6 includes a main chamber pipeline 66 that supplies compressed air to the control chamber 51 via a trigger valve housing 63. The main chamber pipeline 66 is composed of a tubular member connecting the trigger valve housing 63 and the main chamber 13, with one end assembled to the trigger valve housing 63. The main chamber pipeline 66 has a pipeline sealing section 66a at its other end. The pipeline sealing section 66a is composed of an elastic O-ring and is fitted into a groove provided on the outer circumference near the other end of the main chamber pipeline 66, with a portion of it protruding from the outer circumference of the main chamber pipeline 66.

[0056] Furthermore, the trigger valve section 6 includes a connecting passage 67 that connects the trigger valve housing 63 and the control chamber 51 in the main valve housing 53. The connecting passage 67 extends laterally from the upper end of the trigger valve housing 63 near the exhaust section 63a, connecting the upper end of the trigger valve housing 63 to the control chamber 51. The connecting passage 67 is a tubular member 67a made of metal that connects the trigger valve housing 63 and the main valve housing 53.

[0057] The trigger valve section 6 includes a trigger valve upper stem 61 and a valve stem biasing section 64 that biases the trigger valve lower stem 62 via the trigger valve upper stem 61, and a pilot valve biasing section 65 that biases the pilot valve 60.

[0058] The valve stem biasing portion 64 is composed of, for example, a coil spring and is placed between the flange portion 61a of the trigger valve upper stem 61 and the outer surface of the lower end of the trigger valve housing 63. As a result, the valve stem biasing portion 64 biases the trigger valve upper stem 61 downward. The valve stem biasing portion 64 also biases the trigger valve lower stem 62 downward via the trigger valve upper stem 61.

[0059] The pilot valve biasing section 65 is composed of, for example, a coil spring and is placed between the lower end surface of the pilot valve 60 and the inner lower end surface of the trigger valve housing 63. As a result, the pilot valve biasing section 65 biases the pilot valve 60 upward.

[0060] In the trigger valve section 6, the pilot valve 60 is placed in the pilot valve support section 63c of the trigger valve housing 63. This allows the pilot valve 60 to be supported so as to be movable in the vertical direction relative to the trigger valve housing 63.

[0061] Furthermore, the trigger valve section 6 has its upper end portion of the trigger valve upper stem 61 inserted into the first support portion 60f of the pilot valve 60, and its middle portion inserted into the second support portion 63b of the trigger valve housing 63. As a result, the trigger valve upper stem 61 is supported so as to be movable in the vertical direction relative to the trigger valve housing 63. The trigger valve upper stem 61 is also supported so as to be movable in the vertical direction relative to the pilot valve 60.

[0062] In contrast, the trigger valve lower stem 62 is made of a separate component from the trigger valve upper stem 61 and is placed in a third support portion 16 provided on the main body 10. As a result, the trigger valve lower stem 62 is supported so as to be movable in the vertical direction relative to the main body 10.

[0063] The lower stem 62 of the trigger valve is restricted from moving downward by the contact of its position-restricting flange portion 62b with the third support portion 16. As a result, the upper stem 61 of the trigger valve is biased by the valve stem biasing portion 64 and can move downward until the flange portion 61a of the upper stem 61 of the trigger valve contacts the flange portion 62a of the lower stem 62 of the trigger valve, and further until the position-restricting flange portion 62b of the lower stem 62 of the trigger valve contacts the third support portion 16.

[0064] The trigger valve upper stem 61 is configured to have a shorter axial length than the trigger valve lower stem 62. The trigger valve section 6 consists of a pilot valve 60, the trigger valve upper stem 61, a valve stem biasing section 64, and a pilot valve biasing section 65, all of which are assembled to the trigger valve housing 63.

[0065] The trigger valve section 6, in which the trigger valve housing 63 is connected to the head valve 50 and the main valve housing 53, is housed in the cylinder cap 32 and mounted above the handle section 11 and above the main body section 10. As a result, the trigger valve section 6 includes a pilot valve 60, a trigger valve upper stem 61, a valve stem biasing section 64, and a pilot valve biasing section 65, all located above the handle section 11 and above the main body section 10.

[0066] In contrast, the trigger valve lower stem 62 is supported by the main body 10 at a third support portion 16 located between the main body 10 and the handle portion 11. As a result, the nail gun 1A has the trigger valve lower stem 62 positioned between the trigger portion 7 and the trigger valve upper stem 61.

[0067] In the trigger valve section 6, the trigger valve upper stem 61 is made of a separate component from the trigger valve lower stem 62, so that the trigger valve lower stem 62, which is supported by a third support portion 16 provided on the main body section 10, and the trigger valve upper stem 61, which is supported by the main body section 10 via the trigger valve housing 63, do not need to be arranged coaxially.

[0068] Therefore, in the nail gun 1A, the trigger valve upper stem 61 and trigger valve lower stem 62 are supported such that a first reference line L1 along the axial direction passing through the center of the trigger valve upper stem 61 and a second reference line L2 along the axial direction passing through the center of the trigger valve lower stem 62 are offset in a direction that intersects the axial direction. In this example, since the trigger valve section 6, more specifically the pilot valve 60, is positioned close to the main valve section 5, more specifically the control chamber 51, the trigger valve upper stem 61 is provided inward relative to the trigger valve lower stem 62, closer to the main valve section 5, more specifically the control chamber 51, and the trigger valve lower stem 62 is offset relative to the trigger valve upper stem 61 in a direction that intersects the axial direction.

[0069] The contact section 8 comprises a contact top 80 that protrudes below the nozzle 12b, a first contact arm 81a connected to the contact top 80, and a second contact arm 81b that can engage with the contact lever section 71 of the trigger section 7, which will be described later. The first contact arm 81a is an example of a contact arm and is supported by the nose section 12 so as to be movable relative to the vertical direction. The second contact arm 81b is also an example of a contact arm and is supported so as to be movable relative to the main body section 10 in the vertical direction. The contact section 8 is biased downward by a biasing member 82 in the direction in which the contact top 80 protrudes below the nozzle 12b. As a result, the contact section 8 is pressed against the material to be driven, causing the first contact arm 81a to push up the second contact arm 81b, and the second contact arm 81b to move upward relative to the main body section 10. The first contact arm 81a and the second contact arm 81b may be formed as a single unit.

[0070] The trigger unit 7 includes a trigger lever 70. The trigger lever 70 extends from the main body 10 along the handle 11, and the end on the main body 10 side is rotatably supported relative to the main body 10 with a shaft 70a as the pivot point. The trigger unit 7 includes a biasing member 70b that biases the trigger lever 70. The biasing member 70b is made up of, for example, a coil spring, and biases the end of the trigger lever 70 that extends from the main body 10 along the handle 11 in a direction away from the handle 11.

[0071] The trigger unit 7 includes a contact lever unit 71. The contact lever unit 71 is supported by the trigger lever 70 so as to be rotatable with the shaft unit 73a as the pivot point. The tip of the contact lever unit 71 is positioned on the movement path of the second contact arm 81b, which moves upward relative to the main body unit 10. In addition, the portion of the contact lever unit 71 between the tip and the shaft unit 73a faces the lower stem 62 of the trigger valve. As a result, the contact lever unit 71 is configured to be able to engage with the second contact arm 81b and the lower stem 62 of the trigger valve unit 6.

[0072] <Example of operation of the nail gun according to this embodiment> Figures 8 to 11 are cross-sectional views of the main parts showing an example of the operation of the nail gun of this embodiment. Next, the operation of the nail gun 1A will be described.

[0073] In the standby state shown in Figure 8, the trigger valve section 6 is moved to its initial position as the upper stem 61 of the trigger valve is biased downward by the valve stem biasing section 64. In the initial position, the flange portion 61a of the upper stem 61 of the trigger valve is in contact with the flange portion 62a of the lower stem 62 of the trigger valve.

[0074] Furthermore, in the initial position, the trigger valve upper stem 61 has its fourth sealing portion 61b inside the second support portion 63b of the trigger valve housing. As a result, the inner surface of the second support portion 63b and the fourth sealing portion 61b are in contact, maintaining airtightness.

[0075] As a result, compressed air supplied from the main chamber pipeline 66 shown in Figure 7 is supplied to the enlarged diameter section 60g through the supply hole 60h. The trigger valve upper stem 61 has a fifth sealing portion 61c located above the supply hole 60h. Therefore, when compressed air is supplied to the enlarged diameter section 60g below the fifth sealing portion 61c, the flange portion 60a of the pilot valve 60 is pushed upward by the air pressure. Consequently, the air pressure pushing the flange portion 60a of the pilot valve 60 upward, along with the biasing force of the pilot valve biasing portion 65, moves the pilot valve 60 to its initial position. When the pilot valve 60 is in its initial position, a trigger valve lower chamber 60i is formed below the pilot valve 60, and the trigger valve lower chamber 60i becomes filled with compressed air.

[0076] In its initial position, the pilot valve 60 has its upper end inserted into the exhaust portion 63a of the trigger valve housing 63, and the second sealing portion 60d makes contact with the inside of the first trigger valve housing 63d. This closes the exhaust portion 63a.

[0077] From the standby state shown in Figure 8, the operator first pulls the trigger lever 70. When the trigger lever 70 is pulled, it rotates in the direction of arrow C1 with the shaft portion 70a as the pivot point, as shown in Figure 9. As the trigger lever 70 rotates with the shaft portion 70a as the pivot point, the contact lever portion 71 also moves in sync.

[0078] The operator pulls the trigger lever 70, presses the contact top 80 against the material to be nailed, and moves the nail gun 1A toward the material to be nailed. When the contact top 80 is pressed against the material to be nailed, the first contact arm 81a pushes up the second contact arm 81b, causing the second contact arm 81b to move upward relative to the main body 10, as indicated by arrow U1.

[0079] Furthermore, when the second contact arm 81b moves upward relative to the main body 10, it comes into contact with the tip of the contact lever portion 71, pushing the contact lever portion 71 toward the trigger valve lower stem 62. As a result, the contact lever portion 71 moves the trigger valve lower stem 62 upward relative to the main body 10, as indicated by arrow U1.

[0080] When the lower stem 62 of the trigger valve moves upward relative to the main body 10, the upper stem 61 of the trigger valve is pushed by the lower stem 62 and moves upward relative to the main body 10.

[0081] When the second contact arm 81b moves upward relative to the main body 10, and the trigger valve lower stem 62 and the trigger valve upper stem 61 move upward relative to the main body 10 to the operating position, the trigger valve unit 6 enters the ON state, which means it can be operated.

[0082] In other words, when the trigger valve upper stem 61 moves upward relative to the main body 10 to the operating position, the fourth sealing portion 61b enters the enlarged diameter portion 60g from the second support portion 63b. As a result, the trigger valve lower chamber 60i communicates with the exhaust chamber 14, and the air pressure in the trigger valve lower chamber 60i becomes atmospheric pressure through the gap between the inner surface of the second support portion 63b and the outer surface of the trigger valve upper stem 61.

[0083] Therefore, the pilot valve 60 moves downward, as indicated by arrow D1, as shown in Figure 10, while compressing the pilot valve biasing section 65, due to the downward force exerted on the flange section 60a by the compressed air supplied from the main chamber pipeline 66 to the pilot valve support section 63c shown in Figure 7.

[0084] When the pilot valve 60 moves downward, the exhaust portion 63a of the trigger valve housing 63 opens. Also, when the pilot valve 60 moves downward and the third sealing portion 60e moves to a position where it contacts the sealing projection 63g, the space between the upper and lower parts of the third sealing portion 60e in the pilot valve support portion 63c is sealed by the third sealing portion 60e. As a result, compressed air is exhausted from the control chamber 51 through the connecting passage 67 to the exhaust chamber 14.

[0085] When compressed air is exhausted from the control chamber 51, as shown in Figure 11, the air pressure of the compressed air in the main chamber 13 moves the head valve 50 upward, opening the supply passage 13c and sealing the space between the striking cylinder 30 and the exhaust chamber 14. With the supply passage 13c open, compressed air is supplied from the main chamber 13 to the striking cylinder 30, causing the striking piston 30a to move downward. This drives in a nail (not shown).

[0086] As for the operation and effect of the nail gun 1A, the trigger valve section 6, which consists of a pilot valve 60, a trigger valve upper stem 61, a valve stem biasing section 64, and a pilot valve biasing section 65, is assembled to the trigger valve housing 63 and is located above the main body section 10 relative to the handle section 11. The main valve section 5 is also attached above the main body section 10 relative to the handle section 11. The trigger valve section 6 and the main valve section 5 are connected by a connecting passage 67 between the trigger valve housing 63 and the control chamber 51 inside the main valve housing 53.

[0087] In this way, by providing the trigger valve section 6 and the main valve section 5 on the upper side of the main body section 10, the length of the connecting passage 67 can be shortened. Also, the distance between the second sealing section 60d, which is the opening and closing part of the exhaust section 63a, and the control chamber 51 can be shortened. The main valve section 5 controls the opening and closing of the head valve 50 by drawing in and exhausting air from the control chamber 51 through the operation of the trigger valve section 6. As a result, the length of the connecting passage 67 can be shortened, and the distance between the second sealing section 60d and the control chamber 51 can be shortened, reducing the time required for intake and exhaust and improving the response of the operation. Furthermore, since the connecting passage 67 is made of a tubular member 67a made of metal, it is easier to release the temperature inside the pipeline to the outside, and the freezing of moisture inside the pipeline can be suppressed.

[0088] Furthermore, if the trigger valve section 6 is located on the upper part of the main body section 10, the distance between the trigger section 7, located on the lower side of the handle section 11, and the trigger valve section 6 increases. In this configuration, if the trigger valve upper stem 61 is extended so that the trigger section 7 can directly operate the trigger valve upper stem 61, it becomes difficult to align the extended trigger valve upper stem 61 so that it contacts the contact lever section 71 of the trigger section 7. In other words, the trigger valve section 6 requires high dimensional accuracy to ensure that sealing and releasing of each part can be reliably performed by the up-and-down movement of the trigger valve upper stem 61. However, extending the trigger valve upper stem 61 increases the impact of deformation such as stem warping. In addition, assembling the trigger valve section 6, which is assembled in the main valve section 5 within the cylinder cap 32, and the trigger section 7, which is assembled in the main body section 10, with an extended, integrated trigger valve upper stem 61 requires high precision in assembly, making alignment difficult.

[0089] In contrast, the nail gun 1A is equipped with a trigger valve upper stem 61 and a trigger valve lower stem 62, which is composed of a separate part. The trigger valve lower stem 62 is located between the main body 10 and the handle 11, and is positioned between the trigger 7 and the trigger valve upper stem 61, allowing for a closer arrangement to the trigger 7. The trigger 7 has a trigger lever 70 supported by the main body 10 via a shaft 70a, and the trigger valve lower stem 62 is supported by the main body 10 via a third support 16. This relaxes the dimensional setting required for the trigger valve lower stem 62 to contact the contact lever 71 of the trigger 7. Furthermore, since the trigger valve lower stem 62 functions by contacting and pushing up the trigger valve upper stem 61, it can function even if the trigger valve lower stem 62 and the trigger valve upper stem 61 are not coaxial. Therefore, the trigger valve upper stem 61 should be in contact with the trigger valve lower stem 62, making it easy to align the trigger valve portion 6 with respect to the main body portion 10. In addition, by making the trigger valve upper stem 61 shorter in axial length than the trigger valve lower stem 62, deformation such as warping of the trigger valve upper stem 61 can be suppressed, and a predetermined level of airtightness can be ensured.

[0090] Furthermore, by having the trigger valve upper stem 61 and trigger valve lower stem 62 as separate components, the trigger valve upper stem 61 can be offset in a direction that intersects the trigger valve lower stem 62 axially, allowing the trigger valve section 6 to be positioned closer to the main valve section 5. This further shortens the flow path length of the connecting passage 67, reducing the time required for intake and exhaust and improving the operational response.

[0091] Furthermore, the trigger valve upper stem 61, which requires greater airtightness than the trigger valve lower stem 62, is configured to have a shorter axial length than the trigger valve lower stem 62. This suppresses a decrease in airtightness due to the sealing member even if an uneven load is applied to the trigger valve upper stem 61.

[0092] Furthermore, by connecting the trigger valve housing 63 of the trigger valve unit 6 to the main valve housing 53 of the main valve unit 5, the main valve unit 5 and the trigger valve unit 6 can be made into a unit, and the unitized main valve unit 5 and trigger valve unit 6 are housed in the cylinder cap 32 and attached to the upper side of the main body unit 10. This allows the cylinder cap 32 with the main valve unit 5 and trigger valve unit 6 assembled to it to be supplied as an assembled part. Also, when the unitized main valve unit 5 and trigger valve unit 6 are attached to the upper side of the main body unit 10, as shown in Figure 7, the pipe sealing portion 66a of the main chamber pipe 66g comes into contact with the inner surface of the supply pipe 13d connected to the main chamber 13. As a result, by attaching the unitized main valve unit 5 and trigger valve unit 6 to the main body unit 10, the main chamber pipe 66 and the supply pipe 13d can be connected in a state in which compressed air can be supplied.

[0093] <Modified example of the nail gun of this embodiment> Figure 12 is a side cross-sectional view of the main part showing a first modified example of the nail gun of this embodiment, and Figure 13 is a side cross-sectional view of the main part showing an example of the operation of the nail gun of the first modified example of this embodiment.

[0094] Modified nail gun 1B is equipped with a connecting projection 62d on the trigger valve lower stem 62C. The connecting projection 62d consists of a portion that extends laterally from the upper end of the trigger valve lower stem 62C, in accordance with the offset amount of the trigger valve lower stem 62C relative to the trigger valve upper stem 61.

[0095] The lower stem 62C of the trigger valve has a connecting projection 62d that contacts the flange portion 61a of the upper stem 61 of the trigger valve. The other configurations are the same as those of nail gun 1A.

[0096] The operation of the nail gun 1B is the same as that of the nail gun 1A: the operator pulls the trigger lever 70, and while holding the trigger lever 70, presses the contact top 80 against the material to be nailed, and moves the nail gun 1B toward the material to be nailed.

[0097] When the contact top 80, as shown in Figure 1, is pressed against the material to be driven, the second contact arm 81b moves upward relative to the main body 10, as indicated by the arrow U1.

[0098] Furthermore, when the second contact arm 81b moves upward relative to the main body 10, it comes into contact with the contact lever portion 71 and pushes the contact lever portion 71 toward the trigger valve lower stem 62C. As a result, the contact lever portion 71 moves the trigger valve lower stem 62C upward relative to the main body 10, as indicated by arrow U1.

[0099] When the trigger valve lower stem 62C moves upward relative to the main body 10, the flange portion 61a of the trigger valve upper stem 61 is pushed by the connecting projection 62d of the trigger valve lower stem 62C, causing the trigger valve upper stem 61 to move upward relative to the main body 10.

[0100] When the second contact arm 81b moves upward relative to the main body 10, and the trigger valve lower stem 62C and trigger valve upper stem 61 move upward relative to the main body 10 to their operating positions, the trigger valve 6 enters an ON state, indicating it is operable. As a result, the head valve 50 moves upward, compressed air is supplied from the main chamber 13 to the striking cylinder 30, and the striking piston 30a moves downward. Thus, a nail (not shown) is driven out.

[0101] The connecting projection 62d allows for easy adjustment of its length in the extension direction relative to the circular flange portion. This increases the offset amount of the trigger valve lower stem 62C in the direction intersecting the axial direction relative to the trigger valve upper stem 61. This allows the trigger valve upper stem 61 to be brought closer to the main valve portion 5, and the trigger valve portion 6 to be brought closer to the main valve portion 5. As a result, the flow path length of the connecting passage 67 can be further shortened, reducing the time required for intake and exhaust and improving the response of the operation. In addition, by bringing the trigger valve portion 6 closer to the main valve portion 5, the cylinder cap 32 can be made more compact, and the upper part of the main body portion 10 can be made more compact.

[0102] Figure 14 is a side cross-sectional view of a main part showing a second modified example of the nail gun of this embodiment, and Figure 15 is a side cross-sectional view of a main part showing an example of the operation of the nail gun of the second modified example of this embodiment.

[0103] The second modified nail gun 1C includes a transmission member 68 that transmits the movement of the trigger valve lower stem 62E to the trigger valve upper stem 61. The transmission member 68 extends laterally, connecting the upper end of the trigger valve lower stem 62E and the flange portion 61a of the trigger valve upper stem 61. The end of the transmission member 68 opposite to the trigger valve lower stem 62E is rotatably supported on the main body 10 with its shaft portion 68a as a pivot point.

[0104] The transmission member 68 has a lower surface of its tip 68b opposite to its shaft 68a that contacts the upper end of the trigger valve lower stem 62E, and a upper surface of the portion between the shaft 68a and the tip 68b that contacts the flange 61a of the trigger valve upper stem 61. The upper end of the trigger valve lower stem 62E and the lower surface of the flange 61a of the trigger valve upper stem 61 may be curved in the portion that contacts the transmission member 68. The other configurations are the same as those of nail gun 1A.

[0105] The operation of the nail gun 1C is the same as that of the nail gun 1A: the operator pulls the trigger lever 70, and while holding the trigger lever 70, presses the contact top 80 against the material to be nailed, and moves the nail gun 1C toward the material to be nailed.

[0106] When the contact top 80, as shown in Figure 1, is pressed against the material to be driven, the second contact arm 81b moves upward relative to the main body 10, as indicated by the arrow U1.

[0107] Furthermore, when the second contact arm 81b moves upward relative to the main body 10, it comes into contact with the contact lever portion 71 and pushes the contact lever portion 71 toward the trigger valve lower stem 62E. As a result, the contact lever portion 71 moves the trigger valve lower stem 62C upward relative to the main body 10, as indicated by arrow U1.

[0108] When the trigger valve lower stem 62E moves upward relative to the main body 10, the trigger valve section 6 pushes the tip 68b of the transmission member 68 upward. When the tip 68b of the transmission member 68 is pushed upward, it rotates around the shaft 68a as a pivot point, and the portion between the shaft 68a and the tip 68b moves upward. As a result, the flange 61a of the trigger valve upper stem 61 is pushed by the transmission member 68, causing the trigger valve upper stem 61 to move upward relative to the main body 10.

[0109] When the second contact arm 81b moves upward relative to the main body 10, and the trigger valve lower stem 62E and trigger valve upper stem 61 move upward relative to the main body 10 to their operating positions, the trigger valve unit 6 enters an ON state, indicating that it is operable. As a result, the head valve 50 moves upward, compressed air is supplied from the main chamber 13 to the striking cylinder 30, and the striking piston 30a moves downward. Thus, a nail (not shown) is driven out.

[0110] The transmission member 68 allows for easy adjustment of its length in the extension direction from the tip portion 68b to the shaft portion 68a. This increases the amount of offset of the trigger valve lower stem 62E in the direction intersecting the axial direction relative to the trigger valve upper stem 61. Furthermore, in the transmission member 68, the amount of movement of the trigger valve lower stem 62E can be changed in relation to the amount of movement of the trigger valve upper stem 61 until it reaches the operating position, according to the ratio of the length from the shaft portion 68a to the position where the trigger valve lower stem 62E makes contact with the shaft portion 68a to the position where the trigger valve upper stem 61 makes contact. By changing the amount of movement between the trigger valve upper stem 61 and the trigger valve lower stem 62E, the operating response can be set according to the size and application of the nail gun 1C. In addition, by reversing the positions of the transmission member 68 and the shaft portion 68a in the second modified example, it is possible to speed up the operation relative to the stroke of the second contact arm 81b.

[0111] Figures 16 and 17 are side cross-sectional views of the main part showing a third modified example of the nail gun of this embodiment.

[0112] The third modified nail gun 1D includes a flow path area adjustment unit 69. The flow path area adjustment unit 69 is provided in the connecting flow path 67 and adjusts the size of the cross-sectional area of ​​the connecting flow path 67. The flow path area adjustment unit 69 includes, for example, a screw shaft portion 69a, an operating portion 69b for rotating the screw shaft portion 69a, and a screw hole portion 69c for supporting the screw shaft portion 69a. By rotating the operating portion 69b of the flow path area adjustment unit 69, as shown in Figures 16 and 17, the length of the screw shaft portion 69a protruding into the connecting flow path 67 is switched, and the size of the cross-sectional area of ​​the connecting flow path 67 is adjusted. This makes it possible to adjust the flow rate of air passing through the connecting flow path 67. [Explanation of Symbols]

[0113] 1A, 1B, 1C, 1D... Nail gun, 10... Main body, 11... Handle, 12... Nose, 12a... Ejection passage, 12b... Ejection port, 13... Main chamber, 14... Exhaust chamber, 15... Regulator, 2... Driver, 3... Driving section, 30... Impact cylinder, 30a... Impact piston, 30e... Bumper, 33... Blowback chamber, 5... Main valve, 50... Head valve, 51 ...Control chamber, 6...Trigger valve section, 60...Pilot valve, 60a...Flange section, 60b...Ventilation section, 60c...First sealing section, 60d...Second sealing section, 60e...Third sealing section, 60f...First support section, 60g...Enlarged diameter section, 60h...Supply hole, 61...Trigger valve upper stem (second stem), 61a...Flange section, 61b...Fourth sealing section, 61c...Fifth sealing section, 62, 62C, 62E... ...Trigger valve lower stem (first stem), 62a...Flange section, 62b...Position regulating flange section, 62d...Connecting protrusion, 63...Trigger valve housing, 63a...Exhaust section, 63b...Second support section, 63c...Pilot valve support section, 64...Valve stem biasing section, 65...Pilot valve biasing section, 66...Main chamber piping, 67...Connecting passage, 67a...Tubular member, 68...Transmission member, 68a... Shaft section, 68b...Tip section, 69...Flow path area adjustment section, 69a...Screw shaft section, 69b...Operation section, 69c...Screw hole section, 7...Trigger section, 70...Trigger lever, 70a...Shaft section, 70b...Biasing member, 71...Contact lever section, 8...Contact section, 80...Contact top, 81a...First contact arm, 81b...Second contact arm, 82...Biasing member, 9...Feeding section, 90...Magazine

Claims

1. A main chamber for storing compressed air, A striking cylinder is provided, which moves the striking piston axially along the vertical direction by being supplied with compressed air stored in the main chamber, A main valve section that opens and closes the communication between the striking cylinder and the main chamber, A trigger valve unit that operates the main valve unit, It comprises a first stem that is operated upon input, The trigger valve section is The system includes a pilot valve that operates the main valve section, and a second stem that controls the intake and exhaust of compressed air to switch whether or not the pilot valve is operated. The first stem acts to activate the second stem. Driving tool.

2. The first stem contacts the second stem and acts upon the second stem. The driving tool according to claim 1.

3. Equipped with a trigger unit that receives input, The second stem is operated by the operation of the trigger unit. The driving tool according to claim 1.

4. The first stem and the second stem are offset in a direction intersecting the axial direction, and the second stem is provided on the side closer to the main valve portion relative to the first stem. The driving tool according to claim 1.

5. A main body that extends in the vertical direction, The vehicle is provided with a handle portion that extends from the main body portion in a direction intersecting the main body portion, The trigger valve section and the main valve section are located above the handle section and above the main body section. The trigger portion is supported by the main body portion and is located below the handle portion. The first stem is provided between the second stem and the trigger portion. The driving tool according to claim 3.

6. The second stem is shorter in the axial direction than the first stem. The driving tool according to claim 5.

7. The main valve section comprises a main valve housing in which a head valve that opens and closes the communication between the striking cylinder and the main chamber is supported so as to be movable in the vertical direction. The trigger valve section comprises a trigger valve housing in which the pilot valve and the second stem are supported so as to be movable in the vertical direction. The trigger valve section is assembled to the main valve section by connecting the trigger valve housing to the main valve housing. The driving tool according to claim 5.

8. A cylinder cap is attached to the main body and covers the upper part of the main body, The trigger valve section and the main valve section are housed in the cylinder cap, with the trigger valve housing and the main valve housing being housed in the cylinder cap. The driving tool according to claim 7.

9. The system includes a main chamber conduit connected to the main chamber, The main chamber piping is connected to the trigger valve housing and assembled to the trigger valve section. Assembled The driving tool according to claim 7.

10. The trigger valve section and the main valve section are provided with a connecting channel, the connecting channel being a tubular member made of metal that connects the trigger valve housing and the main valve housing. The driving tool according to claim 7.

11. The device includes a transmission member that transmits the movement of the first stem to the second stem. The driving tool according to claim 1.

12. The transmission member causes the amount of movement of the second stem to be different from the amount of movement of the first stem. The driving tool according to claim 11.

13. It includes a connecting channel that connects the trigger valve section and the main valve section, The aforementioned connecting channel is equipped with a channel area adjustment section. The driving tool according to claim 7.

14. A main body that extends in the vertical direction, A main chamber for storing compressed air, A striking cylinder is provided, which moves the striking piston in the axial direction by the supply of compressed air stored in the main chamber, A main valve section that opens and closes the communication between the striking cylinder and the main chamber, A trigger valve unit that operates the main valve unit, A cylinder cap is attached to the main body and covers the upper part of the main body, The main valve section and the trigger valve section are housed in the cylinder cap. Driving tool.

Images