Driving tool

Abstract

To provide a driving tool which can stabilize a machine regardless of a direction in which a contact part is placed in contact with a driven material when a nail is obliquely driven.SOLUTION: A driving tool 10 ejects a fastener from an ejection port 33b formed at a tip of a nose part 17 and includes a contact part 30 at the tip of the nose part 17. The contact part 30 includes a plurality of claw parts 36a which are disposed so as to enclose the ejection port 33b. When a tip of the contact part 30 is placed in contact with a flat driving surface 40 so that a center axis of the ejection port 33b is set at 45 degrees relative to the driving surface 40, the at least three claw parts 36a come into contact with the driving surface 40.SELECTED DRAWING: Figure 9

Description

Technical Field

[0001] The present invention relates to a driving tool for driving a fastener such as a nail or a pin into a material to be driven, and more particularly to a driving tool having a structure advantageous for driving the fastener obliquely.

Background Art

[0002] When using this type of driving tool, for example, when driving a nail into a corner such as near a wall, an operation of driving the nail obliquely into the material to be driven (oblique driving) may occur. During such oblique driving, since the contact area between the material to be driven and the tip of the tool becomes narrow, the tip of the tool tends to slide on the surface of the material to be driven.

[0003] To solve such a problem, a driving tool having a spike claw for oblique driving provided at the tip of the contact portion that contacts the material to be driven is known (see, for example, Patent Document 1). In such a conventional driving tool, during oblique driving, the position of the tip of the tool is determined by piercing the spike claw into the material to be driven.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005]

[0006]

[0007] Conventional driving tools are provided with spike claws for the purpose of suppressing misalignment during oblique driving. However, depending on the direction of the contact portion, the spike claws may not catch well, and there has been a problem that the effect of suppressing misalignment during driving cannot be sufficiently obtained.

[0008] Therefore, an object of the present invention is to provide a driving tool that can stabilize the machine regardless of the direction in which the contact portion is applied when performing an angled driving operation.

Means for Solving the Problems

[0009]

[0010] To solve the above problems, the present invention is a driving tool that injects a fastener from an injection port formed at the tip of a nose portion, the nose portion having a contact portion at its tip, the contact portion including a plurality of claw portions arranged so as to surround the injection port, and when the tip of the contact portion is brought into contact with the driving surface such that the central axis of the injection port is 45 degrees with respect to the flat driving surface, at least three of the claw portions are configured to contact the driving surface.

Effects of the Invention

[0011]

[0012] As described above, in the present invention, when the tip of the contact portion is brought into contact with the driving surface such that the central axis of the injection port is 45 degrees with respect to the flat driving surface, at least three claw portions are configured to contact the driving surface. With such a configuration, the machine can be supported by three or more claw portions at a general angled driving angle, so that the machine can be stabilized regardless of the direction in which the contact portion is brought into contact. In addition, there is no need to provide large claw portions as in the prior art, and the machine can be stabilized with small claw portions, so that the tip portion does not become large and the visibility of the working portion at the tip of the nose portion can be improved.

Brief Description of the Drawings

[0013]

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Modes for Carrying Out the Invention

[0014] (First Embodiment) The driving tool 10 according to this embodiment injects a fastener from an injection port 33b formed at the tip of the nose part 17.

[0015] Since the structure of the driving tool 10 is well-known, it will not be described in detail. For example, it uses compressed air, gas, electricity, etc. as a power source and has a configuration as shown in FIG. 1. The driving tool 10 shown in FIG. 1 includes a grip 11 formed in a rod shape for an operator to hold. Further, a trigger 12 that can be pulled is arranged at a position where the index finger touches when the operator holds the grip 11. When this trigger 12 is pulled, an internal drive mechanism (such as a piston cylinder mechanism or a spring mechanism) operates to drive the fastener.

[0016] At the upper end of the grip 11 described above, an output unit 16 is connected so as to be substantially orthogonal to the grip 11. A nose portion 17 is formed to protrude at the tip of the output unit 16. The nose portion 17 is fixed to the tip of the output unit 16. Inside the nose portion 17, a guide path for the fastener is formed, and the outlet of the guide path for the fastener serves as a shooting outlet 33b. A drive mechanism is built into the output unit 16, and when the drive mechanism operates, the fastener is ejected from the nose portion 17. Specifically, inside the output unit 16, a driver for ejecting the fastener is slidably guided in the direction of the nose portion 17. When the drive mechanism operates, the driver slides impulsively in the direction of the nose portion 17, and the fastener waiting in the guide path of the nose portion 17 is ejected by the tip of the driver.

[0017] A magazine 14 containing a connecting fastener is connected behind the nose portion 17, and the fasteners in the magazine 14 are sequentially supplied into the guide path of the nose portion 17 by a fastener supply mechanism (not shown).

[0018] At the tip of the nose portion 17 according to the present embodiment, a contact nose 20 is slidably provided. This contact nose 20 is connected to a contact arm that is reciprocally movable with respect to the output unit 16 and moves integrally with the contact arm. In the natural state, the contact nose 20 is biased so as to protrude in the tip direction, and in this state, the fastener cannot be driven in. On the other hand, when the tip of the contact nose 20 is pressed against the material to be driven in, the contact arm moves together with the contact nose 20, and the safety mechanism is released, enabling the fastener to be driven in.

[0019] The contact nose 20 according to the present embodiment includes a main body portion 21 and a contact portion 30, as shown in FIG. 2.

[0020] The main body part 21 is a member connected to the tool main body side. In this embodiment, it is connected to the contact arm. Note that this main body part 21 does not necessarily have to be connected to the contact arm. For example, the main body part 21 may be fixed to the tip of the output part 16 (nose part 17) so as not to be movable. Also, the main body part 21 may be integrally formed with the nose part 17. Further, the main body part 21 may be integrally formed at the tip of the contact arm.

[0021] As shown in FIG. 3(c), the main body part 21 according to this embodiment includes a cylindrical part 21b for attaching the contact part 30. A ring holding groove 21a is recessed in a circumferential shape on the inner peripheral surface of this cylindrical part 21b. An O-ring 22 is inserted into this ring holding groove 21a in a compressed state.

[0022] The contact part 30 is a part that contacts the material to be driven when driving a fastener. The contact part 30 according to this embodiment is rotatably attached to the main body part 21, and thereby, as shown in FIGS. 2 and 4, it can rotate with respect to the central axis X of the ejection port 33b. Note that when the contact part 30 is not made rotatable, the contact part 30 may be fixed to the main body part 21, or the contact part 30 may be integrally formed with the main body part 21.

[0023] As shown in FIG. 3(c), this contact part 30 includes an insertion part 31 inserted into the main body part 21 and a cylindrical part 33 protruding in the tip direction of the main body part 21.

[0024] The insertion part 31 is formed in a cylindrical shape that matches the inner diameter of the main body part 21, and an engagement groove 31a is formed on the outer peripheral surface. This engagement groove 31a is a shallow groove that engages with the O-ring 22. When the insertion part 31 is inserted into the main body part 21 up to the position where it abuts against the flange part 32, as shown in Fig. 3(c), the O-ring 22 engages with the engagement groove 31a, and the contact part 30 is prevented from easily falling off from the main body part 21. However, if a force sufficient to elastically deform the O-ring 22 is applied to pull out the contact part 30, it is also possible to remove the contact part 30 from the main body part 21. Also, by connecting the contact part 30 and the main body part 21 using the O-ring 22 in this way, the contact part 30 is rotatable relative to the main body part 21 in the circumferential direction of the O-ring 22.

[0025] The cylindrical part 33 is a cylindrical part as shown in Fig. 3(c), and it protrudes in the tip direction of the main body part 21. An injection path 33a for guiding the fastener is formed in the hollow part of this cylindrical part 33. This injection path 33a communicates with the inside of the nose part 17 and forms a part of the above-described fastener guide path. Also, an injection port 33b for injecting the fastener is opened at the end of the injection path 33a.

[0026] In the cylindrical part 33 according to this embodiment, as shown in Fig. 3(d), a tapered part 34 is formed on the outer peripheral surface of the tip part that forms the injection port 33b. This tapered part 34 is formed such that the outer diameter gradually decreases toward the tip direction. By providing this tapered part 34, when driving obliquely, the injection port 33b can be brought as close as possible to the driving surface. Since the nail can be driven deeper by bringing the injection port 33b closer to the driving surface, the lifting of the nail during oblique driving can be reduced.

[0027] In addition, the tapered portion 34 is provided with a thin-walled portion 34a formed thinner than other portions (non-thin-walled portion 34b) when viewed in the circumferential direction. The thin-walled portion 34a is provided in a shape obtained by notching the outer peripheral surface of the tip of the cylindrical portion 33, and is formed so as not to protrude from the outer shape of the cylindrical portion 33. The surface of the thin-walled portion 34a according to the present embodiment is a flat surface. Further, the surface of the thin-walled portion 34a according to the present embodiment is inclined at an angle different from the surface of the non-thin-walled portion 34b. As shown in FIG. 3(c), the angle of the surface of the thin-walled portion 34a is closer to being parallel to the central axis X of the injection port 33b than the angle of the surface of the non-thin-walled portion 34b. Further, the tip surface 35 of the cylindrical portion 33 in the thin-walled portion 34a is formed to be thinner than the tip surface 35 of the cylindrical portion 33 in the non-thin-walled portion 34b.

[0028] With such a configuration, by bringing the thin-walled portion 34a into contact with the driving surface when performing an oblique strike, the injection port 33b can be brought closer to the driving surface than bringing the non-thin-walled portion 34b into contact with the driving surface.

[0029] When the contact portion 30 is obliquely brought into contact with the driving surface for an oblique strike, depending on the way the contact portion 30 is applied, there may be a case where the non-thin-walled portion 34b rather than the thin-walled portion 34a comes into contact with the driving surface. In such a case, as shown in FIG. 4, by rotating the contact portion 30, it is possible to adjust so that the thin-walled portion 34a comes into contact with the driving surface.

[0030] In the present embodiment, as shown in FIG. 3(b), the thin-walled portions 34a and the non-thin-walled portions 34b are alternately arranged, and a plurality of thin-walled portions 34a are provided at equal intervals in the circumferential direction of the cylindrical portion 33. Specifically, three thin-walled portions 34a are provided at equal intervals in the circumferential direction of the cylindrical portion 33, that is, they are arranged at intervals of 120 degrees. By configuring in this way, it becomes easier to bring the thin-walled portion 34a into contact with the driving surface. Further, even when the thin-walled portion 34a does not come into contact with the driving surface, by rotating the contact portion 30 slightly, the thin-walled portion 34a can be brought into contact with the driving surface.

[0031] Further, on the outer peripheral surface of the cylindrical portion 33 described above, as shown in FIG. 3(d) etc., a protruding portion 36 that projects outward is provided. At the tip of this protruding portion 36, a plurality of claw portions 36a are formed. The claw portions 36a have a sharp shape that tapers in the same direction as the injection direction of the fastener, and are used to catch on the material to be driven when the fastener is driven obliquely. The claw portions 36a are formed so as not to protrude in the tip direction beyond the tip surface 35 of the cylindrical portion 33, so that when driving straight (the operation of driving a nail perpendicular to the material to be driven), the claw portions 36a do not hit the driving surface. In the present embodiment, when viewed in the radial direction D of the cylindrical portion 33, the claw portions 36a are always arranged on the outer peripheral side of the thin-walled portion 34a. For this reason, when the thin-walled portion 34a is brought into contact with the driving surface by oblique driving, the claw portions 36a always face the driving surface.

[0032] In the present embodiment, a plurality (two in the present embodiment) of claw portions 36a are arranged on the outer peripheral side of the thin-walled portion 34a. By arranging a plurality of claw portions 36a in this way, the machine can be supported at a plurality of points, so the posture of the machine during driving can be stabilized.

[0033] Also, in the present embodiment, claw portions 36b are arranged on the outer peripheral side of the non-thin-walled portion 34b. The claw portions 36b on the outer peripheral side of the non-thin-walled portion 34b are formed to protrude more in the tip direction and are larger than the claw portions 36a on the outer peripheral side of the thin-walled portion 34a. By configuring in this way, when the thin-walled portion 34a comes into contact with the driving surface by oblique driving, it becomes possible to catch the large claw portions 36b on the side portion of the thin-walled portion 34a on the material to be driven, and the posture of the machine can be further stabilized.

[0034] The present embodiment is as described above. At the tip of the cylindrical portion 33, a thin-walled portion 34a that is thinner than other portions when viewed in the circumferential direction is provided. According to such a configuration, by bringing the thin-walled portion 34a into contact with the driving surface, the injection port 33b can be brought as close as possible to the driving surface, so the fastener can be driven deeply. Also, since only a part of the contact portion 30 is made thin, the strength of the contact portion 30 is not greatly impaired.

[0035] In the above-described embodiment, the claw portion 36a has a sharp and pointed shape, but the shape of the claw portion 36a is not limited to this. For example, a claw portion 36c as shown in FIGS. 5 and 6 may be provided. The claw portion 36c shown in FIGS. 5 and 6 has a wedge-shaped cutting edge formed in a straight line in a direction orthogonal to the injection direction of the fastener (i.e., the central axis X of the injection port). This claw portion 36c may be provided singly, but the anti-slip effect can be improved by providing it in multiple stages and stacking them. For example, as shown in FIG. 6(d), a plurality of claw portions 36c may be provided in parallel in the radial direction D of the cylindrical portion 33 to form a wave-shaped protrusion. At this time, by making the inner claw portion 36c protrude more in the tip direction than the outer claw portion 36c, the plurality of claw portions 36c can be more easily brought into contact with the driving surface for oblique driving.

[0036] Also, the thin portion 34a according to the above-described embodiment is formed to have a surface inclined with respect to the central axis X of the injection port 33b, but the thin portion 34a does not necessarily have to be an inclined surface. For example, as shown in FIGS. 7 and 8, the surface of the thin portion 34a may be parallel to the central axis X of the injection port 33b. In this way, by making the angle of the surface of the thin portion 34a approach parallel to the central axis X of the injection port 33b, the injection port 33b can be brought closer to the driving surface.

[0037] (Second Embodiment) The driving tool 10 according to the present embodiment injects a fastener from an injection port 33b formed at the tip of the nose portion 17.

[0038] Since the structure of the driving tool 10 is well-known, it will not be described in detail. For example, it uses compressed air, gas, electricity, etc. as the power source, and has the configuration shown in FIG. 1. The driving tool 10 shown in FIG. 1 includes a grip 11 formed in a rod shape for an operator to hold. Further, at the position where the index finger touches when the operator holds the grip 11, a trigger 12 that can be pulled is arranged. When this trigger 12 is pulled, an internal drive mechanism (such as a piston cylinder mechanism or a spring mechanism) operates to drive the fastener in.

[0039] At the upper end of the grip 11 described above, an output portion 16 is connected so as to be substantially orthogonal to the grip 11. At the tip of this output portion 16, a nose portion 17 is formed to protrude. The nose portion 17 is fixed to the tip of the output portion 16. Inside the nose portion 17, a guide path for the fastener is formed, and the outlet of the guide path for the fastener serves as the ejection port 33b. A drive mechanism is built into this output portion 16, and when the drive mechanism operates, the fastener is ejected from the nose portion 17. Specifically, inside the output portion 16, a driver for ejecting the fastener is guided slidably in the direction of the nose portion 17. When the drive mechanism operates, the driver slides impulsively in the direction of the nose portion 17, and the fastener waiting in the guide path of the nose portion 17 is ejected by the tip of the driver.

[0040] Note that a magazine 14 that houses the connecting fastener is connected behind the nose portion 17, and the fasteners in the magazine 14 are sequentially supplied into the guide path of the nose portion 17 by a fastener supply mechanism (not shown).

[0041] At the tip of the nose portion 17 according to this embodiment, a contact nose 20 is provided slidably. This contact nose 20 is connected to a contact arm provided reciprocally movable with respect to the output portion 16, and moves integrally with the contact arm. In the natural state, the contact nose 20 is biased to project in the tip direction, and in this state, it is configured such that a fastener cannot be driven in. On the other hand, when the tip of the contact nose 20 is pressed against the material to be driven, the contact arm moves together with the contact nose 20, the safety mechanism is released, and a state where the fastener can be driven in is achieved.

[0042] Note that the contact nose 20 does not necessarily need to be connected to the contact arm. For example, the contact nose 20 may be fixed to the tip of the output portion 16 (nose portion 17) so as not to be movable. Also, the contact nose 20 may be formed integrally with the nose portion 17. Further, the contact nose 20 may be formed integrally with the tip of the contact arm.

[0043] The contact nose 20 according to this embodiment, as shown in FIGS. 9 and 10, includes a contact portion 30 at the tip. The contact portion 30 is a portion that contacts the material to be driven when driving the fastener. As shown in FIG. 10(c), this contact portion 30 includes a cylindrical portion 33 that forms an injection path 33a for guiding the fastener. The injection path 33a communicates with the inside of the nose portion 17 and forms a part of the above-described guide path for the fastener. Also, at the end of the injection path 33a (the tip of the cylindrical portion 33), an injection port 33b for injecting the fastener is open.

[0044] As shown in Fig. 10(d), the cylindrical portion 33 according to this embodiment is a cylindrical part protruding in the tip direction of the contact portion 30. A tapered portion 34 is formed at the tip of the cylindrical portion 33. The tapered portion 34 is formed such that the outer diameter gradually decreases toward the tip direction. By providing this tapered portion 34, when driving obliquely, the ejection port 33b can be brought as close as possible to the driving surface 40. Since the nail can be driven deeper by bringing the ejection port 33b closer to the driving surface, the lifting of the nail during oblique driving can be reduced.

[0045] In addition, a plurality of claw portions 36a are arranged around the ejection port 33b in the cylindrical portion 33. These claw portions 36a are arranged on the outer peripheral side of the tip surface 35 of the cylindrical portion 33 that forms the ejection port 33b. Further, these claw portions 36a have a sharp shape pointed in the same direction as the injection direction of the fastener, and are used to catch on the material to be driven when the fastener is driven obliquely. In this embodiment, the plurality of claw portions 36a are all formed with the same size and the same shape, and are arranged at equal intervals in the circumferential direction.

[0046] The driving tool 10 according to this embodiment is configured to be able to support the posture of the machine with three or more claw portions 36a during oblique driving by including a plurality of such small claw portions 36a. Specifically, as shown in Fig. 11, when the tip of the contact portion 30 is brought into contact with the driving surface 40 such that the central axis X of the ejection port 33b is 45 degrees with respect to the flat driving surface 40, at least three claw portions 36a are configured to come into contact with (pierce) the driving surface 40. Since at least three claw portions 36a are configured to pierce the driving surface 40, depending on the way the contact portion 30 is applied, as shown in Fig. 12, four claw portions 36a may pierce the driving surface 40.

[0047] In addition, in order to ensure that at least three claw portions 36a contact the driving surface 40 when driving obliquely, it is desirable to set the distance between the tips of the plurality of claw portions 36a to 5 mm or less, and more desirably to 3 mm or less.

[0048] According to such a configuration, the machine can be supported by three or more claw portions 36a at a general oblique driving angle (around 45 degrees). That is, regardless of the position where the contact portion 30 is abutted in the circumferential direction (even if the user does not need to be conscious of which claw portion 36a to hook), three or more claw portions 36a will always contact the driving surface 40, so that the machine can be easily stabilized. In addition, there is no need to provide large claw portions as in the prior art, and the machine can be stabilized with small claw portions 36a, so the tip portion does not become large, and the visibility of the working portion at the tip of the nose portion 17 can be improved.

[0049] In the above-described embodiment, as shown in FIG. 10(d), the tip surface 35 of the cylindrical portion 33 is formed flat. However, the present invention is not limited to this, and an anti-slip shape may be provided at the tip of the cylindrical portion 33.

[0050] For example, as shown in FIGS. 13 and 14, an annular protrusion 35a may be formed at the tip of the cylindrical portion 33. In the examples shown in FIGS. 13 and 14, the protrusion 35a is provided so as to be continuous with the tapered portion 34 (sharing the tapered surface of the tapered portion 34). The protrusion 35a is formed to protrude in the tip direction from the tip surface 35 of the cylindrical portion 33. The protrusion 35a is formed in a thin blade shape with a sharp tip, and is provided concentrically with the ejection port 33b. By providing such an annular protrusion 35a, the posture of the machine can be further stabilized when driving obliquely. That is, the annular protrusion 35a can suppress slipping in a direction different from that of the claw portion 36a at a position away from the claw portion 36a, so that the posture of the machine can be stabilized by the synergistic effect with the claw portion 36a.

[0051] Also, as shown in FIGS. 15 and 16, unevenness may be provided at regular intervals in the circumferential direction on the tip surface 35 of the cylindrical portion 33. In the examples shown in FIGS. 15 and 16, the concave portions 35b are provided, but instead of this, convex portions may be provided. Further, when providing convex portions, the tips of the convex portions may have a tapered claw shape. By providing such unevenness, the posture of the machine can be further stabilized during diagonal driving. That is, due to this unevenness, at a position away from the claw portion 36a, slippage in a direction different from that of the claw portion 36a can be suppressed, so that the posture of the machine can be stabilized by the synergistic effect with the claw portion 36a.

[0052] In the above-described embodiment, the claw portion 36a having a sharp and pointed shape is provided, but the shape of the claw portion 36a may be a different shape. For example, as shown in FIGS. 17 and 18, a flat-tooth claw portion 36a may be provided. With such a configuration, variations in shape during processing can be reduced as compared with the case of forming the claw portion 36a having a sharp shape.

Explanation of Reference Numerals

[0053] 10 Driving tool 11 Grip 12 Trigger 14 Magazine 16 Output portion 17 Nose portion 20 Contact nose 21 Body portion 21a Ring holding groove 21b Cylindrical portion 22 O-ring 30 Contact portion 31 Insertion portion 31a Engagement groove 32 Flange portion 33 Cylindrical portion 33a Injection path 33b Injection port 34 Tapered portion 34a Thin-walled portion 34b Non-thin-walled portion 35 Tip surface 35a Projection 35b recess 36 protrusion 36a claw portion 36b claw portion 36c claw portion 40 driving surface D radial direction of the cylindrical portion X central axis of the radiation exit

Claims

1. A driving tool for injecting a fastener from an injection port formed at the tip of a nose portion, wherein a contact portion is provided at the tip of the nose portion, the contact portion includes a cylindrical portion forming the injection port, and the cylindrical portion includes a plurality of claw portions arranged so as to surround the injection port, a blade-shaped protrusion that is annular and has a pointed tip is formed at the tip of the cylindrical portion, the claw portions are arranged on the outer peripheral side of the protrusion, and the distance between the tips of the claw portions is set to 3 mm or less, when the tip of the contact portion is brought into contact with the driving surface such that the central axis of the injection port is 45 degrees with respect to the flat driving surface, at least three of the claw portions are configured to be in contact with the driving surface. Driving tool.

2. The cylindrical portion includes a tapered portion formed such that the outer diameter gradually decreases in the tip direction, and the protrusion is formed so as to be continuous with the tapered portion. The driving tool according to Claim 1.

3. All of the plurality of claw portions are formed in the same shape. The driving tool according to any one of Claims 1 and 2.

4. The plurality of claw portions are formed so as not to protrude in the tip direction from the protrusion. The driving tool according to any one of Claims 1 to 3.

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