Driving tool

Abstract

This invention provides a driving tool that allows for a wide range of adjustment for the driving depth while ensuring safety through a simple configuration. [Solution] The device comprises a main body 11, a contact member 30 that slidably protrudes from the main body 11 and enables fastener insertion when pressed into the main body 11, and an attachment part 40 that can be positioned at the tip of the contact member 30. The attachment part 40 has an inner part 41 that extends the fastener injection path 33 formed inside the contact member 30, and an outer part 45 that covers the inner part 41. The inner part 41 and the outer part 45 are relatively movable in the fastener injection direction.

Description

Technical Field

[0001] The present disclosure relates to an implanting tool for implanting a fastener into a driven material, and particularly to a technique for adjusting the implanting depth of the fastener.

Background Art

[0002] A general implanting tool employs a structure in which an impact mechanism is activated by operating a trigger to drive a driver, and the driver strikes and ejects a nail supplied inside a nose portion.

[0003] Since it is dangerous for such an implanting tool to be able to eject a nail in the air, a tool provided with a safety mechanism using a contact member is known. The contact member is provided so as to protrude from the tip of the nose portion. By pressing this contact member against the driven material and pushing it into the body, the sign is turned ON, and the activation operation by the trigger becomes effective. That is, when the contact member is pushed in to a predetermined position, the sign is turned ON, and the impact mechanism is configured to operate on the condition that the sign is turned ON and the trigger is operated simultaneously. With such a configuration, even if the trigger is operated while the contact member is not pushed in, the nail is not ejected.

[0004] In a tool provided with such a contact member, if the contact member is hit when trying to move the tool, or if the tool is accidentally dropped, there is a risk of deforming or damaging the contact member. Also, if the contact member is inadvertently operated by the operator's hand, or if the contact member comes into contact with the driven material or the like and is operated, there is a risk of causing an accident.

[0005] As a method for preventing deformation or damage of such a contact member, or preventing malfunction or unauthorized use caused by the contact member coming into contact with the driven material or the hand, for example, Patent Document 1 describes a configuration in which a cover for covering the outside of the contact member is provided.

[0006] Incidentally, some nail driving tools of this type are known to have an adjustment mechanism for adjusting the nail driving depth. A typical adjustment mechanism can change the amount of protrusion of the contact member. By increasing the amount of protrusion of the contact member, the distance from the body to the tip of the contact member when the sign is ON (when driving) can be increased. As a result, when driving, the tip of the body (nose part) is lifted away from the material being driven by the amount of the protrusion of the contact member, and the nail driving depth can be reduced.

[0007] However, if the nail driving depth is adjusted to be shallow, the amount of protrusion (exposure) of the contact member increases, so even if a cover like the one in Patent Document 1 is provided, the safety effect of this cover is reduced.

[0008] Regarding this issue, methods to adjust the nailing depth while maintaining safety have been employed, such as keeping the amount of protrusion (exposure) of the contact member small by not providing an adjustment mechanism for adjusting the nailing depth, or by narrowing the range in which the nailing depth can be adjusted to reduce the maximum amount of protrusion (exposure) of the contact member (Proposed solution 1).

[0009] Furthermore, as described in Patent Document 2, it was considered to provide a movable cover that covers the outside of the contact member, so that the movable cover moves together with the contact member when the nail driving depth is adjusted (Appropriate Option 2). [Prior art documents] [Patent Documents]

[0010] [Patent Document 1] Japanese Patent Publication No. 2005-22069 [Patent Document 2] Japanese Patent Publication No. 2009-178810 [Overview of the project] [Problems that the invention aims to solve]

[0011] However, the above-mentioned alternative solution 1 sometimes failed to achieve the desired functionality because it could not set the nail driving depth to be sufficiently shallow. For example, it could not satisfy the user's request to drive the nail in with the nail head sufficiently raised to make it easier to remove.

[0012] Furthermore, the aforementioned alternative solution 2 had the problem of increasing the complexity of the mechanism and raising manufacturing costs. In addition, it required a large space in the stroke direction to move the contact members and movable cover, which resulted in a larger machine.

[0013] Therefore, the purpose of this disclosure is to provide a driving tool that can widen the range of adjustment for the driving depth and ensure safety with a simple configuration. [Means for solving the problem]

[0014] An inserting tool according to one aspect of the present disclosure is an inserting tool having a striking mechanism for inserting a fastener, comprising: a main body; a contact member that slidably protrudes from the main body and moves to a predetermined position in the direction opposite to the fastener's ejection direction, thereby turning on the inserting tool to enable inserting a fastener; and an attachment portion that can be positioned at the tip of the contact member, wherein the attachment portion has an inner portion that extends the fastener's ejection path formed inside the contact member, and an outer portion that covers the inner portion, and the inner portion and the outer portion are relatively movable in the fastener's ejection direction. [Effects of the Invention]

[0015] A driving tool according to one aspect of the present disclosure includes an attachment portion that can be positioned at the tip of a contact member, the attachment portion having an inner portion that extends the injection path of the fastener formed inside the contact member. Therefore, by positioning the attachment portion, the contact member can be extended towards the tip, and the driving depth of the fastener can be made shallower.

[0016] Furthermore, it has an outer part that covers the inner part, and the inner and outer parts are relatively movable in the direction of the zipper's ejection. Therefore, even if a user tries to hold the inner part and push it in with their hand, the outer part covers the inner part, making it difficult to hold the inner part with their hand. Also, since the inner and outer parts are relatively movable in the direction of the zipper's ejection, manipulating the outer part will not move the inner part, thus preventing malfunctions.

[0017] Furthermore, the term "covering" the inner part by the outer part is not limited to a configuration in which the outer part completely covers the inner part. In other words, any configuration that reduces the exposure of the inner part so that it becomes difficult to operate the inner part by hand is included in the definition of "covering" in this invention.

[0018] This configuration allows for a wider range of adjustment for the driving depth, while also ensuring safety with a simple configuration. [Brief explanation of the drawing]

[0019] [Figure 1A] This is a side view of the driving tool according to the first embodiment. [Figure 1B] This is a cross-sectional view of the driving tool according to the first embodiment. [Figure 2] (a) A partially enlarged cross-sectional view of the nose portion of the driving tool according to the first embodiment, and (b) a cross-sectional view of the attachment portion according to the first embodiment. [Figure 3] This is a partially enlarged perspective view of the area near the nose portion of the driving tool according to the first embodiment. [Figure 4]It is a partially enlarged cross-sectional view near the nose portion of the driving tool according to the first embodiment, (a) a view during the transition from the sign OFF state to the sign ON state, and (b) a view in the sign ON state. [Figure 5] It is a partially enlarged cross-sectional view near the nose portion of the driving tool according to Modification 1 of the first embodiment. [Figure 6] It is a partially enlarged cross-sectional view near the nose portion of the driving tool according to Modification 2 of the first embodiment, (a) a view in the sign OFF state, and (b) a view in the sign ON state. [Figure 7] It is a partially enlarged perspective view near the nose portion of the driving tool according to the second embodiment. [Figure 8] It is a partially enlarged cross-sectional view near the nose portion of the driving tool according to the second embodiment, (a) a view in the sign OFF state, and (b) a view in the sign ON state.

Mode for Carrying Out the Invention

[0020] (First Embodiment) The first embodiment of the present invention will be described with reference to FIGS. 1 to 5.

[0021] As shown in FIG. 1B, the driving tool 10 according to the present embodiment has a striking mechanism 19 for driving a rod-shaped fastener (nail) into a material to be driven. The driving tool 10 is a hand-held tool and includes a main body portion 11, a magazine 28, a contact member 30, and an attachment portion 40, as shown in FIG. 1A. In the following description, the injection direction of the fastener is downward, and the opposite direction of downward is upward.

[0022] The main body portion 11 is a main structural portion including the striking mechanism 19 and includes a body 17, a grip 12, a gas cylinder housing portion 16, and a nose portion 20. The body 17, the grip 12, the gas cylinder housing portion 16, and the nose portion 20 are integrally formed. These parts may be formed of the same member or may be formed by assembling a plurality of members.

[0023] The body 17 is formed in a substantially cylindrical shape and incorporates a striking mechanism that performs the fastener driving operation. The striking mechanism is a mechanism that generates the driving force for the driving operation. The fastener driving tool 10 according to this embodiment incorporates a gas combustion type striking mechanism. In a gas combustion type striking mechanism, a known structure can be used in which a combustible gas is injected into a sealed combustion chamber, a mixture of the combustible gas and air is stirred in the combustion chamber, and the stirred mixture is burned in the combustion chamber to generate high-pressure combustion gas in the combustion chamber, and this high-pressure combustion gas acts on a striking piston housed in a striking cylinder to shock-drive the striking piston within the striking cylinder, and the fastener is driven out by a driver 19a coupled to the lower side of the striking piston. Note that this striking mechanism is merely an example, and the striking mechanism may be equipped with other power sources. For example, it may be operated by air pressure, or by a motor or spring.

[0024] Although not specifically shown in the diagram, the body 17 incorporates a safety mechanism to ensure the safe operation of the striking mechanism. Since a known configuration can be used for the safety mechanism, its description is omitted. However, the mechanism is configured such that the sign turns ON when the contact member 30 (described later) is pushed into a predetermined position inside the body 17, and the striking mechanism is activated only when the trigger 13 is operated while the sign is ON. This configuration prevents the fastener from being ejected even if the trigger 13 is operated while the contact member 30 is not pushed in.

[0025] Furthermore, an adjuster 18 is provided near the lower end of the body 17 for adjusting the amount of protrusion of the contact member 30. The adjuster 18 adjusts the movement of the contact member 30 in the direction of fastener insertion and is equipped with a dial that can be operated by the operator. By operating this dial, the contact member 30 moves in the direction of fastener insertion. This changes the position of the lower end of the contact member 30, thereby allowing adjustment of the fastener insertion depth.

[0026] As will be described later, in this embodiment, the insertion depth of the zipper can also be adjusted by attaching and detaching the attachment part 40, so the adjuster 18 does not need to be provided. Even if the adjuster 18 is provided, it is desirable that the adjustment range of the insertion depth of the zipper that can be adjusted by attaching and detaching the attachment part 40 be larger than the adjustment range of the insertion depth of the zipper that can be adjusted by the adjuster 18. In other words, the adjuster 18 is used for fine adjustment of the insertion depth, and if it is desired to change the insertion depth significantly, the adjustment may be made using the attachment part 40.

[0027] The grip 12 is a rod-shaped part that the operator holds when using the fastening tool 10. This grip 12 is connected to the body 17 described above at approximately a right angle. A trigger 13 is located on this grip 12. The trigger 13 is an operating lever that is operated to activate the striking mechanism. The operator can operate the fastening by operating this trigger 13. This trigger 13 is located in a position that can be operated by the hand holding the grip 12. Specifically, the trigger 13 is located at a position where the operator's index finger rests when gripping the grip 12 (below the front end of the grip 12), and can be operated by pulling the trigger 13 with the index finger. When the trigger 13 is operated in the ON state (as described later), the striking mechanism is activated and the fastener is driven in. However, even if the trigger 13 is operated in the OFF state, the striking mechanism will not be activated (the fastener will not be driven in).

[0028] A battery mounting section 14 is provided at the rear end of the grip 12. A battery 15, which is a secondary battery, can be attached to and detached from the battery mounting section 14. This battery 15 supplies power to the striking mechanism. Specifically, the battery 15 supplies power to a motor that drives a fan for mixing flammable gas and air in the combustion chamber, and to an ignition device that ignites the gas mixture.

[0029] The gas canister storage section 16 is located below the grip 12, approximately parallel to the grip 12. A gas canister filled with liquefied fuel gas canister is removable inside this gas canister storage section 16. The striking mechanism burns the flammable gas supplied from the gas canister to propel the fastener.

[0030] The nose portion 20 is a part integrally provided at the lower end of the body 17. The nose portion 20 includes a protruding portion 22, which will be described later, and a cover that covers the protruding portion 22. Inside the nose portion 20, as shown in Figure 2(a), a fastener waiting area 21 is provided. The fastener waiting area 21 is provided on the movement path of the driver 19a that dispenses fasteners, and one fastener to be dispensed next is waiting there. When the driver 19a slides toward the nose portion 20, the fastener waiting in the fastener waiting area 21 is dispensed from the tip 22a of the nose portion 20. In this embodiment, the tip 22a of the nose portion 20 has an outer circumferentially tapered surface.

[0031] A magazine 28 is attached to the rear of the nose section 20. The magazine 28 is for storing linked fasteners, which are made up of multiple fasteners connected together. The linked fasteners stored in the magazine 28 are sequentially supplied to the nose section 20, and the leading fastener is held so that it is positioned directly below the driver 19a (fastener waiting area 21).

[0032] A fastener supply mechanism, which works in conjunction with the striking mechanism, is provided at the connection point between the nose section 20 and the magazine 28, although not specifically shown in the diagram. The fastener supply mechanism pulls out connecting fasteners from the magazine 28 and sequentially supplies the fasteners to the fastener waiting area 21. Specifically, when the striking mechanism is activated and a fastener is ejected, the fastener supply mechanism is activated in conjunction with this and automatically supplies the fasteners stored in the magazine 28 one by one to the fastener waiting area 21 of the nose section 20. The fasteners supplied to the fastener waiting area 21 by the fastener supply mechanism will wait in the fastener waiting area 21 until the next ejection is performed.

[0033] Furthermore, the nose portion 20 is provided with a projection 22 that protrudes below the fastener waiting area 21. The projection 22 covers at least a portion of the outer circumferential surface of the contact member 30, which will be described later.

[0034] The contact member 30 slidably protrudes from the main body 11 and constitutes a safety mechanism that enables fastener driving when pushed into the main body 11. The fastener will not be ejected unless the contact member 30 is pressed against the material to be driven and pushed to the position where the sign is ON, thus preventing accidents in which the fastener is launched into the air. The sign ON state is the state in which the safety mechanism is released, the operation of the trigger 13 becomes effective, and the fastener can be driven in with the driving tool 10. The driving tool 10 enters the sign ON state when the contact member 30 moves to a predetermined position in the direction opposite to the fastener ejection direction.

[0035] The contact member 30 is slidable vertically relative to the nose portion 20. The contact member 30 is also biased downward by a biasing mechanism (such as a spring), which is not shown. The contact member 30 can be pushed upward against the biasing force of the biasing mechanism.

[0036] The contact member 30 comprises an arm portion 31 extending downward from the vicinity of the striking mechanism (near the adjuster 18) and a contact nose 32 formed at the lower end of the arm portion 31.

[0037] The contact nose 32 protrudes below the nose portion 20. More specifically, the contact nose 32 protrudes below the tip 22a of the protruding portion 22 and is slidable along the inner circumferential surface of the protruding portion 22. The contact nose 32 can be moved upward by bringing its tip surface into contact with the material to be driven and pressing it against it.

[0038] In its natural state, the contact member 30 is biased downward by the biasing means described above, so the contact nose 32 protrudes downward. In this state, the safety mechanism is in the OFF state, which disables the operation of the trigger 13, so the fastener will not be extended even if the trigger 13 is operated.

[0039] On the other hand, when the tip surface of the contact nose 32 is pressed against the material to be driven in, and the contact nose 32 is pushed upward, the arm portion 31 moves upward as a whole, and the safety mechanism is released, resulting in the ON state.

[0040] Although the attachment part 40 is attached in Figure 2(a), the attachment part 40 is removable as shown in Figure 3. By removing the attachment part 40 in this way, the tip surface of the contact nose 32 can be brought into direct contact with the material to be driven.

[0041] Inside the contact nose 32, a fastener injection path 33 is formed, as shown in Figure 2(a). The injection path 33 is positioned to be continuous with the area below the fastener waiting area 21. When the driver 19a ejects a fastener waiting in the fastener waiting area 21, the fastener passes through the injection path 33 and is ejected to the outside.

[0042] The contact nose 32 according to this embodiment is provided with an engaging portion 34 on its outer circumferential surface near its tip. The engaging portion 34 according to this embodiment is a tapered portion formed at the tip of the contact nose 32. That is, the outer circumferential surface of the tip of the contact nose 32 gradually widens in a tapered shape as it goes downwards, and this tapered portion is the engaging portion 34. This engaging portion 34 is used to attach and detach the attachment portion 40, which will be described later. Note that the shape of the engaging portion 34 is not limited to a tapered shape, but may be other shapes (such as protrusions or grooves).

[0043] The attachment part 40 is a component that can be positioned at the tip of the contact member 30. In this embodiment, the attachment part 40 is configured to be detachably attached to the tip of the contact member 30. Since the attachment part 40 is positioned to extend the contact member 30, attaching the attachment part 40 has the same effect as increasing the amount of protrusion of the contact member 30. That is, if the attachment part 40 is not attached, the fastener can be driven deeply into the material to be driven. Conversely, if the attachment part 40 is attached, the fastener can be driven shallowly into the material to be driven. When the fastener is driven shallowly into the material to be driven, the nail head will be raised away from the material to be driven, making it easier to remove the fastener later.

[0044] As shown in Figure 2(b), the attachment portion 40 has an inner portion 41 and an outer portion 45. At least a portion of the surface of the inner portion 41 is covered by the outer portion 45. Therefore, the attachment portion 40 has a double structure consisting of an inner portion 41 and an outer portion 45.

[0045] The inner portion 41 is a member that extends the injection path 33 formed inside the contact member 30. The inner portion 41 is positioned below the contact member 30 and is a member that can come into contact with the material to be injected in place of the contact member 30.

[0046] The inner portion 41 is a cylindrical member as shown in Figure 2(b). In this embodiment, it is made of an elastic material such as synthetic resin or rubber. The inner portion 41 can be connected to the contact member 30 by press-fitting the tip of the contact member 30 into it.

[0047] A flange portion 41a is provided near the upper end of the inner portion 41. The flange portion 41a is a portion that protrudes outward from the outer peripheral surface 41b of the inner portion 41. The outer peripheral surface 41b of the inner portion 41 is formed in a cylindrical shape with substantially the same diameter. The flange portion 41a is formed near the upper end of this outer peripheral surface 41b. The flange portion 41a functions as a retainer to prevent the inner portion 41 from falling off the outer portion 45. Note that the retainer shape that prevents the inner portion 41 from falling off the outer portion 45 does not have to be a flange shape as in this embodiment. The retainer shape formed on the inner portion 41 does not need to be such that it engages with the outer portion 45 and can restrict the amount of downward movement relative to the outer portion 45.

[0048] A hole is formed inside the inner part 41 that penetrates vertically. The inner diameter of the inner circumferential surface 41c of this hole changes when viewed in the vertical direction. The upper part of the inner circumferential surface 41c of the inner part 41 constitutes a mounting part 41d for attaching the contact member 30. The lower part of the inner circumferential surface 41c of the inner part 41 constitutes an extended injection path 41f that extends the injection path 33 of the fastener. The extended injection path 41f is formed with a smaller inner diameter than the mounting part 41d. Alternatively, the extended injection path 41f may be formed with a larger inner diameter than the injection path 33. By making the inner diameter of the extended injection path 41f larger than the inner diameter of the injection path 33, snagging during fastener passage can be prevented.

[0049] The mounting portion 41d has a tapered engaged portion 41e. The engaged portion 41e widens towards the bottom and is formed to engage with the engaging portion 34 of the contact nose 32. Therefore, as shown in Figure 3, by pushing the attachment portion 40 onto the contact nose 32, the engaging portion 34 and the engaged portion 41e engage, and the attachment portion 40 can be attached to the contact nose 32. When attaching the attachment portion 40 to the contact nose 32, the mounting portion 41d elastically deforms, and the contact nose 32 is press-fitted.

[0050] Furthermore, when removing the attachment part 40 from the contact nose 32, the attachment part 40 can be removed by pulling it downwards, which will cause the mounting part 41d to elastically deform.

[0051] A step 41g is formed between the mounting portion 41d and the extended injection path 41f. The step 41g forms a surface perpendicular to the injection direction of the fastener. When the attachment portion 40 is attached to the contact nose 32, the tip surface of the contact nose 32 can come into contact with the step 41g, as shown in Figure 2(a). Therefore, when the lower surface 41h of the attachment portion 40 is pressed against the material to be driven, the tip surface of the contact nose 32 is pushed upward via the step 41g.

[0052] The outer portion 45 is a member that covers the inner portion 41 described above. The inner portion 41 is slidably housed in the internal space of the outer portion 45. Furthermore, the inner portion 41 and the outer portion 45 are relatively movable in the direction of fastener ejection. The inner portion 41 is formed to be able to extend and retract from below the outer portion 45.

[0053] The outer portion 45 is a cylindrical member as shown in Figure 2(b). In this embodiment, the outer portion 45 is made of a material that is at least more rigid than the inner portion 41. The outer portion 45 is made of, for example, metal.

[0054] The inner circumferential surface 45a of the outer portion 45 is formed with the same diameter in the vertical direction. A locking portion 45b is formed near the lower end of the inner circumferential surface 45a of the outer portion 45. The locking portion 45b is a portion of the lower opening edge of the outer portion 45 that protrudes in the inward diameter direction. The size of the opening formed at the tip (inside) of the locking portion 45b is large enough to guide the outer circumferential surface 41b of the inner portion 41 in a slidable manner, but it is formed to be smaller than the outer diameter of the flange portion 41a of the inner portion 41. Therefore, as shown in Figure 2(b), when the inner portion 41 moves as far down as possible relative to the outer portion 45, the locking portion 45b and the flange portion 41a engage, and the inner portion 41 cannot move any further downward.

[0055] A through hole 45d is formed on the upper surface 45c of the outer portion 45 for the contact nose 32 to pass through. The through hole 45d is formed to be large enough so as not to interfere with the contact nose 32.

[0056] Furthermore, the opening edge 45e of the through hole 45d has a tapered slope to match the slope of the tip 22a of the nose portion 20. This tapered slope allows the outer portion 45 and the main body portion 11 to engage stably through surface contact. This suppresses the tilting of the outer portion 45 when the outer portion 45 and the main body portion 11 engage.

[0057] The aforementioned through hole 45d is formed to be smaller than the flange portion 41a of the inner portion 41. Therefore, as shown in Figure 4(b), when the inner portion 41 moves to its uppermost position relative to the outer portion 45, the flange portion 41a engages with the top surface 45g of the internal space of the outer portion 45, preventing the inner portion 41 from moving any further upward. In this way, when the flange portion 41a engages with the top surface 45g of the internal space of the outer portion 45, that is, when the inner portion 41 moves to its uppermost position relative to the outer portion 45, the inner portion 41 is completely housed inside the outer portion 45. At this time, the lower surface 41h of the inner portion 41 and the lower end portion 45f of the outer portion 45 may be on the same plane.

[0058] Figure 4(b) shows the case where the driving depth using the adjuster 18 is set to the maximum. In this case, with the sign ON, the inner part 41 is completely housed inside the outer part 45. However, if the driving depth using the adjuster 18 is set to a shallower value, the amount of protrusion of the contact nose 32 increases, so with the sign ON, the inner part 41 may protrude slightly from below the outer part 45.

[0059] When this attachment part 40 is attached to the contact nose 32, the inner part 41 is fixed to the contact nose 32, but the outer part 45 can move up and down. In other words, the outer part 45 can move up and down relative to the main body part 11. However, the amount of movement is limited to a predetermined range.

[0060] Specifically, the top dead center position of the outer portion 45 relative to the nose portion 20 is the position where the tip 22a of the nose portion 20 engages with the opening edge 45e of the through hole 45d. In this embodiment, the tip 22a of the nose portion 20 corresponds to the "contact portion provided on the main body portion 11" as described in the claim. The opening edge 45e of the outer portion 45 corresponds to the "contact portion that can contact the contact portion" as described in the claim. That is, the upward movement of the outer portion 45 is restricted by the contact of the opening edge 45e (contact portion) with the tip 22a (contact portion). The bottom dead center position of the outer portion 45 is the position where the flange portion 41a engages with the top surface 45g of the outer portion 45. The outer portion 45 can move freely between this top dead center position and the bottom dead center position.

[0061] However, in the sign-off state (when not pressed against the material to be driven), as shown in Figure 2(a), the flange portion 41a and the locking portion 45b engage before the outer portion 45 reaches the top dead center position. Therefore, if the outer portion 45 is grasped by hand and moved upward in the sign-off state, the inner portion 41 engaged with the outer portion 45 can also be moved upward. However, even if the outer portion 45 is moved to the top dead center position relative to the nose portion 20, the inner portion 41 cannot be moved to the position where the sign is ON. This point will be explained in detail with reference to Figure 2(a). Figure 2(a) shows the state when the outer part 45 is positioned as high as possible relative to the inner part 41 (in other words, when the outer part 45 is positioned at its top dead center relative to the inner part 41. This top dead center position of the outer part 45 relative to the inner part 41 is different from the top dead center position of the outer part 45 relative to the nose part 20) when no external force is applied to the contact member 30. In this state, let A be the amount of protrusion of the inner part 51 from the outer part 45, and let B be the distance from the opening edge 45e (contact part) to the tip 22a (part that is contacted). Also, let C be the distance the contact member 30 moves from this standby position to the sign ON state (the distance the contact member 30 moves from the position shown in Figure 2(a) to the position shown in Figure 4(b)). At this time, it is set so that A + B > C. Note that the value of B increases or decreases depending on the setting of the driving depth by the adjuster 18, but this equation is set to hold true regardless of how the driving depth by the adjuster 18 is set. For example, the value of B may be "0". By setting it so that this equation holds true, even if the outer part 45 is moved to the top dead center position, the inner part 41 cannot be moved to the position where the sign is ON. In models where the stroke range of the contact member 30 can be changed, the value of C may increase or decrease. In this case, the standby position of the contact member 30 also changes, but the standby position of the contact member 30 can be applied to all positions of the contact member 30 before the sign-on state is reached. In other words, the same effect can be obtained if "A + B > C" holds true.

[0062] Furthermore, as the contact nose 32 is pushed in and the sign is turned ON, the range of motion of the outer part 45 becomes even more limited.

[0063] For example, Figure 4(a) shows the state in which the attachment portion 40 is pressed against the material to be driven, in the process of transitioning from the sign OFF state to the sign ON state. In this state, the distance between the tip 22a of the nose portion 20 and the flange portion 41a is narrowed, so the range of movement of the outer portion 45 is narrowed.

[0064] Furthermore, the state shown in Figure 4(b) indicates that the attachment part 40 is pressed against the material to be driven, resulting in the sign being ON. In this state, the outer part 45 can hardly move.

[0065] Thus, the outer portion 45 can come into contact with the main body portion 11 (the tip 22a of the nose portion 20), thereby limiting the range of movement (top dead center) of the outer portion 45. Specifically, even if the inner portion 41 and the contact member 30 are pushed into the main body portion 11 as the outer portion 45 moves in the opposite direction (upward), the range of movement (top dead center) of the outer portion 45 is limited so that the sign ON state, which allows fastener insertion, is not activated. With this configuration, the sign ON state is not activated even if the outer portion 45 is operated.

[0066] Furthermore, since the inner portion 41 is covered by the outer portion 45, as shown in Figure 4(b), the exposure of the inner portion 41 when the sign is ON is minimized, and it is difficult to turn the sign ON even if the inner portion 41 is accidentally operated by contact with a hand or the material to be driven in. In this embodiment, when the sign is ON, the amount of protrusion of the inner portion 41 from the outer portion 45 is zero. In this way, by setting the amount of protrusion of the inner portion 41 from the outer portion 45 to be smaller than the amount of protrusion D from the main body portion 11 of the contact member 30, it becomes more difficult to operate the attachment portion 40 improperly than when it is not attached.

[0067] As described above, according to this embodiment, the contact member 30 is provided with an attachment portion 40 that can be positioned at the tip of the contact member 30, and the attachment portion 40 has an inner portion 41 that extends the fastener injection path 33 formed inside the contact member 30. Therefore, by positioning the attachment portion 40, the contact member 30 can be extended towards the tip, and the insertion depth of the fastener can be made shallower.

[0068] Furthermore, it has an outer part 45 that covers the inner part 41, and the inner part 41 and the outer part 45 are movable relative to each other in the direction of zipper ejection. In other words, the inner part 41 and the outer part 45 are movable independently of each other in the direction of zipper ejection. Therefore, even if a user makes contact with the outer circumference of the inner part 41 and performs a pushing operation, the outer part 45 covers the inner part 41, so the inner part 41 cannot be moved to the sign ON position. Also, even if a user accidentally makes contact with the outer part 45 and performs a pushing operation, since the outer part 45 is movable relative to the inner part 41, only the outer part 45 moves, preventing the zipper from reaching the sign ON state where it can be driven in.

[0069] This configuration allows for a wider range of adjustment for the driving depth, while also ensuring safety with a simple configuration.

[0070] In the embodiment described above, the entire inner portion 41 is formed from an elastic material, but this is not limited to this. For example, as shown in Figure 5, the inner portion 41 may be formed by combining multiple members. In the example in Figure 5, the inner portion 41 is composed of an elastic portion 42 made of an elastic material and a rigid portion 43 made of a material with higher rigidity than the elastic portion 42. The elastic portion 42 is the part for press-fitting the tip of the contact member 30. The rigid portion 43 is the part that forms the extended injection path 41f and is the part that may come into contact with the fastener or the material to be driven in. By forming the part that connects to the tip of the contact member 30 from an elastic material in this way, the attachment portion 40 can be easily attached and detached by press-fitting. In addition, the rigidity of the part that may come into contact with the fastener or the material to be driven in can be increased, so the effects of wear and damage can be reduced.

[0071] Furthermore, the length of the outer portion 45 may be set longer than that of the embodiment described above to improve the guiding performance. For example, as shown in Figure 6, an additional guide portion 45g may be provided above the opening edge 45e of the outer portion 45 (the portion that engages with the tip 22a of the nose portion 20). The additional guide portion 45g can be formed in a cylindrical shape that extends the outer portion 45 upward. The additional guide portion 45g may be formed to cover the tip 22a of the nose portion 20. The additional guide portion 45g may also be formed to be movable up and down along the circumferential surface of the nose portion 20. By extending the outer portion 45 in this way, the tilting of the outer portion 45 can be suppressed.

[0072] Furthermore, in the above-described embodiment, the tip of the contact member 30 is press-fitted into the inner portion 41, but the configuration is not limited to this, and the inner portion 41 may be press-fitted into the tip of the contact member 30.

[0073] Furthermore, in the embodiment described above, the outer portion 45 is made capable of contacting the tip 22a of the nose portion 20, thereby limiting the amount of movement (top dead center) of the outer portion 45. However, the contact position for limiting the movement of the outer portion 45 does not necessarily have to be the tip 22a of the nose portion 20. A contact portion with the outer portion 45 can be provided at any position on the main body portion 11, and this contact portion can contact the outer portion 45 and restrict the movement of the outer portion 45.

[0074] Alternatively, multiple attachment sections 40 with different lengths of the extended injection path 41f may be created to allow selection of the injection depth. In other words, the injection depth may be changed simply by replacing the attachment section 40.

[0075] Furthermore, even if the amount of protrusion of the contact member 30 relative to the main body 11 increases due to the vertical movement of the outer portion 45, the inner portion 41 can still be covered within a predetermined range relative to the main body 11. For example, when the fastener insertion depth is set to the deepest level using the adjuster 18 and the sign is turned ON, as shown in Figure 4(b), the vertical movement of the outer portion 45 is restricted by the nose portion 20 and the inner portion 41 and it cannot move. On the other hand, when the fastener insertion depth is set to a shallower level using the adjuster 18 and the sign is turned ON, the distance between the nose portion 20 and the inner portion 41 becomes larger than in Figure 4(b), and the outer portion 45 can move slightly vertically.

[0076] If the fastening tool 10 does not allow adjustment of the fastening depth by the adjuster 18, the outer part 45 does not need to be able to move up and down. For example, the outer part 45 may be fixed to the main body 11.

[0077] (Second embodiment) A second embodiment of the present invention will be described with reference to Figures 7 and 8. The characteristic feature of this embodiment is that the attachment part 50 is detachable from the main body part 11. Since the basic configuration of this embodiment is the same as that of the first embodiment, only the differences will be described to avoid redundant descriptions.

[0078] As shown in Figure 7, the main body portion 11 (nose portion 20) according to this embodiment is provided with a fixing portion 25 for attaching the attachment portion 50. The fixing portion 25 is fixed to the side surface of the nose portion 20 by fixing means such as a screw 26 and has a semicircular recess 25a.

[0079] On the other hand, the attachment part 50 is a component that can be positioned at the tip of the contact member 30. In this embodiment, the attachment part 50 is configured to be detachably attached to the fixing part 25 of the main body part 11. Since the attachment part 50 is positioned to extend the contact member 30, attaching the attachment part 50 has the same effect as increasing the amount of protrusion of the contact member 30. That is, if the attachment part 50 is not attached, the fastener can be driven deeply into the material to be driven. Also, if the attachment part 50 is attached, the fastener can be driven shallowly into the material to be driven. When the fastener is driven shallowly into the material to be driven, the nail head will be floating above the material to be driven, making it easier to remove the fastener later.

[0080] As shown in Figure 8, the attachment portion 50 has an inner portion 51 and an outer portion 55. At least a portion of the surface of the inner portion 51 is covered by the outer portion 55. Therefore, the attachment portion 50 has a double structure consisting of the inner portion 51 and the outer portion 55.

[0081] The inner portion 51 is a member that extends the injection path 33 formed inside the contact member 30. The inner portion 51 is positioned below the contact member 30 and is a member that can come into contact with the material to be injected in place of the contact member 30.

[0082] The inner portion 51 is a cylindrical member as shown in Figure 8. In this embodiment, it is made of a highly rigid material such as metal. The inner portion 51 is slidably held by the outer portion 55.

[0083] The inner portion 51 is attached so as to cover the outer circumferential surface of the contact nose 32. That is, it is movable up and down along the outer circumferential surface of the contact nose 32. Inside the inner portion 51, there is a contact receiving portion 51a into which the tip of the contact nose 32 engages. The contact receiving portion 51a forms a surface perpendicular to the fastener's ejection direction. When the attachment portion 50 is attached to the contact nose 32, the tip surface of the contact nose 32 can come into contact with the contact receiving portion 51a. Therefore, when the lower surface 51d of the attachment portion 50 is pressed against the material to be driven in, the tip surface of the contact nose 32 is pushed upward via the contact receiving portion 51a.

[0084] Below the contact receiving portion 51a, a hole is formed that penetrates vertically. This hole constitutes an extended injection path 51b that extends the injection path 33 of the fastener.

[0085] A guide slit 51c extending in the direction of fastener ejection is formed on the side of the inner portion 51. A guide pin 55b, described later, is slidably engaged with this guide slit 51c. This engagement guides the vertical sliding of the inner portion 51 relative to the outer portion 55.

[0086] The outer portion 55 is a member that covers the inner portion 51 described above. In this embodiment, the outer portion 55 is made of a highly rigid material such as metal. The inner portion 51 is slidably housed in the internal space of the outer portion 55. Furthermore, the inner portion 51 and the outer portion 55 are relatively movable in the direction of fastener ejection. The inner portion 51 is formed to be able to extend and retract from below the outer portion 55.

[0087] The outer portion 55 includes a guide tube portion 55a that supports the inner portion 51 and a mounting portion 55c for attaching it to the main body portion 11.

[0088] The guide tube portion 55a is a cylindrical part as shown in Figure 8, and houses the inner portion 51 so that it can move up and down. A guide pin 55b is attached to this guide tube portion 55a. The guide pin 55b protrudes into the inside of the guide tube portion 55a and enters the inside of the guide slit 51c of the inner portion 51. When the guide pin 55b engages with the guide slit 51c, the inner portion 51 becomes immobile and slidable inside the guide tube portion 55a.

[0089] The mounting portion 55c is equipped with a lever 56 as shown in Figure 7. The lever 56 is rotatable in the vertical direction. When the lever 56 is rotated, the pivot shaft 57 of the lever 56 rotates in conjunction with it. A notch 57a is provided on the surface of the pivot shaft 57. As shown in Figure 8(a), when the contact nose 32 is inserted all the way into the attachment portion 50, the pivot shaft 57 faces the recess 25a of the fixing portion 25. Then, by rotating the lever 56 to engage the recess 25a and the pivot shaft 57, the attachment portion 50 and the contact nose 32 can be irremovably coupled. When removing the attachment portion 50, the lever 56 is rotated to face the recess 25a and the notch 57a. This releases the engagement between the recess 25a and the pivot shaft 57, and the attachment portion 50 can be removed from the contact nose 32.

[0090] When this attachment part 50 is attached to the contact nose 32, the outer part 55 is fixed to the main body part 11, but the inner part 51 can move up and down. However, the inner part 51 moves up and down in practical terms together with the contact nose 32.

[0091] Since the outer part 55 is fixed to the main body 11, it is not possible to turn the sign ON by operating this outer part 55.

[0092] Furthermore, since the inner portion 51 is covered by the outer portion 55, it is difficult to manipulate the inner portion 51 illegally. That is, as shown in Figure 8(b), the exposure of the inner portion 51 when the sign is ON is minimal, making it difficult to hold the inner portion 51 by hand and set the sign to ON. In this embodiment, when the sign is ON, the inner portion 51 is completely housed inside the outer portion 55, and the lower surface 51d of the inner portion 51 and the lower end portion 55d of the outer portion 55 are on the same plane. In other words, the amount of protrusion of the inner portion 51 from the outer portion 55 is zero. In this way, if the amount of protrusion of the inner portion 51 from the outer portion 55 is set to be smaller than the amount of protrusion D from the main body portion 11 of the contact member 30, then attaching the attachment portion 50 makes it more difficult to manipulate than not attaching it.

[0093] Figure 8(b) shows the case where the driving depth using the adjuster 18 is set to the maximum. When the driving depth using the adjuster 18 is set to a shallower setting, the inner part 51 protrudes slightly from the outer part 55. However, even in this case, the amount of protrusion of the inner part 51 from the outer part 55 is set to be smaller than the amount of protrusion D from the main body part 11 of the contact member 30, so by attaching the attachment part 50, it is actually more difficult to perform unauthorized operation than when it is not attached.

[0094] Furthermore, because the tip of the inner part 51 is formed with a chamfered shape, it is even more difficult to grasp and manipulate the inner part 51 with your fingers.

[0095] As described above, according to this embodiment, the contact member 30 is provided with an attachment portion 50 that can be positioned at the tip of the contact member 30, and the attachment portion 50 has an inner portion 51 that extends the fastener injection path 33 formed inside the contact member 30. Therefore, by positioning the attachment portion 50, the contact member 30 can be extended towards the tip, and the insertion depth of the fastener can be made shallower.

[0096] Furthermore, it has an outer part 55 that covers the inner part 51, and the inner part 51 and the outer part 55 are relatively movable in the direction of the zipper's ejection. In other words, the inner part 51 can move independently of the outer part 55 in the direction of the zipper's ejection. Therefore, even if a user accidentally touches the inner part 51 and pushes it in, the outer part 55 covers the inner part 51, preventing the inner part 51 from moving to the sign-on position.

[0097] This configuration allows for a wider range of adjustment for the driving depth by controlling the height of the attachment, while also ensuring safety with a simple configuration.

[0098] In the embodiment described above, the attachment portion 50 is made detachable by a mounting portion 55c equipped with a lever 56, but the method of attaching and detaching the attachment portion 50 is not limited to this. Any mounting method can be arbitrarily selected as long as the attachment portion 50 can be attached and detached.

[0099] (others) This disclosure is not limited to the embodiments described above, and various modifications are possible within the scope of the claims. For example, embodiments obtained by appropriately combining the technical means disclosed in different embodiments and modifications are also included in the technical scope of the present invention. [Explanation of Symbols]

[0100] 10. Driving tools 11 Main body 12 Grips 13 Trigger 14 Battery mounting section 15 batteries 16 Gas canister storage section 17 Body 18 Adjuster 19. Striking mechanism 19a driver 20 Nose section 21 Zipper waiting area 22 Protrusion 22a Tip 25 Fixed part 25a recess 26 screws 28 Magazine 30 Contact Members 31 Arm section 32 Contact Nose 33. Injection path 34 Engagement part 40 Attachment section 41 Inner part 41a Flange section 41b Outer surface 41c Inner surface 41d Mounting part 41e Engaged part 41f Extended injection path 41g step 41h Bottom side 42 Elastic part 43 Rigid part 45 Outer part 45a Inner surface 45b Locking part 45c top 45d passing hole 45e Opening edge 45f lower end 50 Attachment section 51 Inner part 51a Contact receiver 51b Extended injection path 51c Guide Slit 51d Bottom surface 55 Outer part 55a Guide tube section 55b Guide pin 55c Mounting part 55d Lower end 56 Lever 57. Rotary shaft 57a Notch D. Amount of protrusion of the contact member from the main body.

Claims

1. A driving tool having a striking mechanism for driving out fasteners, The main body and A contact member that slidably protrudes from the main body and moves to a predetermined position in the direction opposite to the fastener ejection direction, thereby turning on the sign that the fastening tool can drive in the fastener, An attachment portion that can be positioned at the tip of the contact member, Equipped with, The attachment portion has an inner portion that extends the injection path of the fastener formed inside the contact member, and an outer portion that covers the inner portion. The inner part and the outer part are movable relative to each other in the direction of the zipper's ejection. Driving tool.

2. The inner portion and the outer portion are slidable relative to each other in the direction of the fastener's ejection. The driving tool according to claim 1.

3. The outer portion is movable relative to the contact member in the vertical direction. The driving tool according to claim 1.

4. Even if the inner portion and the contact member are pushed into the main body as the outer portion moves in the opposite direction to the tip, the range of movement of the outer portion is limited so that the sign ON state, which allows fastening, is not reached. The driving tool according to claim 3.

5. The outer portion has a contact portion that can contact the contact portion provided on the main body, The upward movement of the outer portion is restricted when the contact portion comes into contact with the portion to be contacted. The driving tool according to claim 3.

6. When the contact member is in a standby position and has not moved to the predetermined position, and the outer portion is positioned at top dead center relative to the inner portion, When A is the amount of protrusion of the inner portion from the outer portion, B is the distance from the contact portion to the portion being contacted, and C is the distance the contact member moves from the standby position to the ON state, A + B > C is a characteristic of The driving tool according to claim 5.

7. The attachment portion is detachably attached to the tip of the contact member. The driving tool according to claim 1.

8. The inner portion and the tip of the contact member are joined by press-fitting one into the other. The driving tool according to claim 7.

9. The inner portion is formed of an elastic material at the part that connects with the tip of the contact member. The driving tool according to claim 8.

10. When the contact member is pressed into the main body and the sign is turned ON, enabling fastener installation, The amount of the inner portion protruding from the outer portion is smaller than the amount of the contact member protruding from the main body portion. The driving tool according to claim 1.

11. The attachment part is detachable from the main body. The driving tool according to claim 1.

Images