JP3064425U - Hand tool grip structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly prevent a grip portion 4 of a hammer 1 having a wooden handle 2 from slipping. SOLUTION: A head part 3 is provided at one end of a wooden handle 2,
In the grip structure of a hand tool in which the other end is configured as a grip portion 4 that is gripped by a user, the grip portion 4 is provided at an intermediate portion in the longitudinal direction on the other end portion side of the handle 2 to have an outer diameter of the handle 2. By forming the small diameter portion 7 having a smaller diameter than the stepped portion 7a, the retaining portion 2a is formed on the outer end side of the small diameter portion 7 and the small diameter portion 7 has an elastic cylindrical shape. The gripping member 8 is externally fitted in a state where the gripping member 8 is prevented from being removed by the retaining portion 2a.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a grip structure of a tool (hereinafter, referred to as a hand tool) that operates via manual operation (man-made operation) such as a hammer used for civil engineering, construction or home DIY, etc. In particular, it is suitably used for a relatively large hammer having a wood handle.

[0002]

[Prior art]

 This type of hammer has a rod-shaped handle provided with a head (working tool) made of steel, hard resin, etc. at one end and a grip at the other end of the handle to be gripped by the user. Is commonly used. As the handle of the hammer, a wooden one made of white oak or the like, or a metal one such as steel is used.

[0003]

[Problems to be solved by the invention]

 Of the above-mentioned hammers, those with a metal handle are often used for relatively small ones such as nailing, and the grip portion is made of a non-slip grip member made of synthetic rubber or the like. Is usually fitted to the outer periphery of the handle. On the other hand, in the case of a wooden handle, there is no special grip member such as anti-slip, and the grain is usually exposed as it is. And so on.

[0004] However, simply winding the non-slip tape has a small anti-slip effect, and thus may be inconvenient to use. In particular, in the case of a large hammer used for pile driving or the like, the non-slip tape may be used. A sufficient anti-slip effect could not be obtained. In addition, there was another problem that dust and sand adhered due to peeling of the tape, and the effect of preventing slippage was reduced. On the other hand, the conventional grip member attached to a metal handle was molded from synthetic rubber through a complicated process such as a vulcanization process, which increased the manufacturing cost and was disadvantageous for mass production. .

[0005] The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a hand-held tool, such as a hammer having a wooden handle, which can effectively prevent slippage of a grip portion. An object of the present invention is to provide a grip structure of a hand tool that can perform the above-described operations. It is another object of the present invention to provide a configuration in which a grip member can be manufactured at low cost.

[0006]

[Means for Solving the Problems]

 The present invention takes the following technical measures to achieve the above-mentioned object. That is, the present invention provides a hand tool grip structure in which a working tool is provided at one end of a wooden handle, and the other end is configured as a grip portion to be gripped by a user. By forming a small-diameter portion having a smaller diameter than the outer diameter of the handle through a step portion at a middle portion in the longitudinal direction on the other end portion side, a retaining portion is formed on the outer end side of the small-diameter portion, In addition, an elastic cylindrical grip member is fitted to the small diameter portion in a state where the grip member is prevented from being removed by the retaining portion.

[0007] According to this, a grip member can be provided with a simple configuration even for a wooden handle, and the grip member can effectively prevent the grip portion from slipping. Further, by forming a small-diameter portion via a step portion in the middle of the handle in the longitudinal direction, a retaining portion is formed on the outer end side (the other end side) of the small-diameter portion, and the retaining portion is stopped by the retaining portion. Since the grip member is fitted around the small diameter portion, the grip member can be prevented from coming off the handle, and the anti-slip effect can be maintained well. Further, by making the grip member adhere to the outer peripheral surface of the small diameter portion by its elasticity, it is possible to prevent the grip member from turning or twisting on the outer peripheral surface of the small diameter portion.

As the grip member, it is preferable to use a member molded of a thermoplastic elastomer. In this case, the grip member does not undergo a vulcanizing step or the like as in the case of ordinary rubber, and is subjected to the same injection molding as a thermoplastic resin. Since the grip member can be formed by extrusion or extrusion, the manufacturing cost can be reduced. At this time, if a long cylindrical member is formed by extruding a thermoplastic elastomer and the cylindrical member is cut into a predetermined size to form a grip member, a large amount of grip members can be obtained at low cost. It will be something that can be done.

On the other hand, by forming a concave-convex surface on the outer periphery of the small-diameter portion to prevent slippage between the small-diameter portion and the inner peripheral surface of the grip member, it is possible to prevent the grip member from slipping in the longitudinal direction with respect to the small-diameter portion as described above. Circumferential turning, twisting, and the like can be reliably prevented. In addition, an adhesive may be interposed between the grip member and the small diameter portion. In this case, a circumferential retaining is provided on the outer peripheral surface of the small diameter portion so that the adhesive can be retained inside the groove. It is preferable to form a plurality of grooves in the longitudinal direction. By adopting such a configuration, when the small-diameter portion is inserted into the cylinder of the grip member, the adhesive applied to the small-diameter portion can be retained at a predetermined position without spreading unevenly, and the grip member can be held in the longitudinal direction. It becomes possible to adhere evenly over almost the entirety.

It is preferable that the outer peripheral surface of the handle and the outer peripheral surface of the grip member are flush with each other.

[0011]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a hammer 1 as a hand tool according to the present invention. The hammer 1 is provided with a head part 3 as a working tool at one end of a rod-shaped handle 2, and the other of the handle 2. A grip portion 4 is provided on the end side to be gripped by the user, and the head portion 3 performs a striking action such as a pile driving while the grip portion 4 is gripped by hand. .

The head 3 shown in the figure has a double-sided head having a striking surface 3a at both ends, but has a one-sided head 3 having a striking surface 3a at only one end, and a nail punch at the other end. The head unit 3 having the above-described configuration may be used. Further, the material of the head portion 3 is steel, hard resin, wood, synthetic rubber, or the like, but is not particularly limited. The handle 2 is made of wood such as white oak and formed into a rod shape whose vertical cross-sectional shape is substantially elliptical. Has become.

A circumferential recess 6 is formed by cutting the outer peripheral surface of the handle 2 at the other end thereof in the longitudinal direction while the other end of the handle 2 is left. Are formed in a small diameter portion 7 having a smaller diameter than other portions of the handle 2. A grip member 8 formed of an elastic material is fitted on the small diameter portion 7. The small-diameter portion 7 is formed in an elliptical cross section, whereas the grip member 8 is formed in a cylindrical shape (true cylinder) having both ends opened and has the same length as the small-diameter portion 7. The grip member 8 is configured to be fitted to the small-diameter portion 7 by inserting the other end of the handle 2 into the cylinder while expanding the inner diameter of the grip member 8 by elastic deformation. The small diameter portion 7 is closely adhered to the outer periphery of the small diameter portion 7 due to the elastic return and is deformed into an elliptical shape along the elliptical shape of the small diameter portion 7.

Here, by making the grip member 8 adhere to the outer periphery of the small-diameter portion 7 by its elasticity, the grip member 8 hardly turns or twists on the small-diameter portion 7. Even if the cylindrical shape is different from the outer peripheral shape of the small diameter portion 7, the rotation of the grip member 8 can be prevented. Since the small-diameter portion 7 is formed on the other end side of the handle 2 at the middle portion in the longitudinal direction via the step portion 7a, both ends of the grip member 8 are brought into contact with the step portions 7a at both ends of the small-diameter portion 7. This can prevent the grip member 8 from being displaced or removed in the longitudinal direction.

Therefore, the anti-slip effect of the grip portion 4 can be maintained satisfactorily, and the usability of the hammer 1 is improved. Here, the outer end side (the other end side) of the handle 2 with respect to the small diameter portion 7 is configured as a retaining portion 2a which has an effect of preventing the grip member 8 from coming off. A plurality of circumferential concave grooves 10 are formed on the outer peripheral surface of the small diameter portion 7 in the longitudinal direction, and the outer peripheral surface of the small diameter portion 7 having the concave grooves 10 is located between the inner peripheral surface of the grip member 8 and the outer peripheral surface. It has a concave and convex surface to prevent slippage. Therefore, the grip member 8 slightly swells into the concave groove 10 due to its elasticity, so that a displacement or the like with respect to the small diameter portion 7 can be reliably prevented.

When the grip member 8 is fitted to the small-diameter portion 7, the thickness and the recess of the grip member 8 are adjusted so that the outer peripheral surface of the handle 2 and the outer peripheral surface of the grip member 8 are flush. 6 is set so that the appearance is not deteriorated because there is no unevenness in appearance, and the outer diameter of the grip portion 4 is the same as that of the conventional wooden handle without the grip member 8. Accordingly, the hammer 1 of the present embodiment can be used with a similar feeling of use. Note that an adhesive may be interposed between the outer peripheral surface of the small diameter portion 7 and the inner peripheral surface of the grip member 8. In this case, in addition to the elastic force of the grip member 8 and the action of the uneven surface, The grip member 8 can be firmly fixed by the adhesive.

In this case, the concave groove 10 formed on the outer peripheral surface of the small diameter portion 7 constitutes a retaining groove for retaining the adhesive in the groove. When the handle 2 is inserted into the inside, the adhesive applied to the small-diameter portion 7 is less likely to spread unevenly, and the grip member 8 is evenly bonded along its longitudinal direction. Here, the grip member 8 is formed of a thermoplastic elastomer, and is mainly used for outdoor work because of the properties of the thermoplastic elastomer such as heat deterioration resistance, weather resistance, cold resistance and ozone resistance. The anti-slipping effect of the hammer 1 can be suitably maintained. Further, due to the excellent elasticity and tensile strength, the adhesion to the small diameter portion 7 is also improved.

Further, since the thermoplastic elastomer can be extruded and injection-molded without going through a vulcanizing step, the grip member 8 can be manufactured at low cost by these manufacturing methods. In the present embodiment, specifically, a styrene-based thermoplastic elastomer is used, and the grip member 8 is molded by extruding the styrene-based thermoplastic elastomer. More specifically, a long cylindrical member is formed by extrusion, and the grip member 8 is manufactured by cutting the same into a predetermined size, whereby a large number of products can be obtained at low cost. I can do it.

Further, by adopting the extrusion process, it is possible to easily form the longitudinal ridge 11 as shown in FIGS. 4A and 4B on the outer peripheral surface of the grip member 8. By forming such a ridge, the anti-slip effect can be further improved. By the way, the present invention is not limited to the above embodiment, and the design can be changed as appropriate. For example, the grip member 8 can be formed in an elliptical cylindrical shape as shown in FIG. 5 (a), or as shown in FIG. 5 (b), an irregularly shaped cylinder having a circular inner periphery and an elliptical outer periphery. It is also possible to form the small-diameter portion 7 into a circular cross section when the grip member 8 having the irregular cylindrical shape is used.

In addition, the uneven surface for preventing slippage between the small diameter portion 7 and the grip member 8 may be configured as a knurled groove as shown in the figure, and when an adhesive is used, This groove can be configured as an adhesive retaining groove. Further, the grip member 8 may be manufactured by injection molding of a thermoplastic elastomer. In this case, each grip member 8 may be formed by molding, or a long cylindrical member may be formed by molding. A plurality of grip members 8 may be manufactured by cutting the grip members 8 into pieces.

[0021]

[Effects of the Invention] As described in detail above, according to the present invention, it is possible to prevent slippage of a good grip portion even with a hand tool having a wooden handle, and as a grip member, heat is prevented. By using the one molded by extrusion using a plastic elastomer, the grip member can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 shows a hammer (hand tool) according to an embodiment of the present invention.
It is a perspective view of.

FIG. 2 is a perspective view showing a handle of a hammer and a grip member.

FIG. 3 is a longitudinal sectional view of a grip member.

FIG. 4 is a longitudinal sectional view showing another form of the grip member.

FIG. 5 is a longitudinal sectional view showing another form of the grip member.

FIG. 6 is a side view showing another embodiment of the uneven surface.

[Explanation of symbols]

 Reference Signs List 1 hammer (hand tool) 2 handle 2a retaining part 3 head part (work implement) 4 grip part 7 small diameter part 7a step part 8 grip member

Claims (6)

[Utility model registration claims] 1. A grip structure for a hand tool, wherein a work implement (3) is provided at one end of a wooden handle (2) and a grip part (4) for holding the other end by a user. The grip portion (4) includes a small-diameter portion (7) having a smaller diameter than the outer diameter of the handle (2) at a middle portion in the longitudinal direction on the other end side of the handle (2). By forming through, a retaining portion (2a) is formed on the outer end side of the small diameter portion (7),
A grip for a hand tool, wherein an elastic cylindrical grip member (8) is fitted to the small-diameter portion (7) in a state where the grip member (8) is prevented from being removed by the retaining portion (2a). Construction. 2. The hand tool grip structure according to claim 1, wherein said grip member (8) is formed of a thermoplastic elastomer. 3. The grip member (8) is formed by cutting a long tubular member formed by extruding a thermoplastic elastomer into a predetermined size. Hand tool grip structure. 4. An outer surface of the small-diameter portion (7) is provided with an uneven surface for preventing slippage between the small-diameter portion (7) and an inner peripheral surface of the grip member (8). Hand tool grip structure. 5. The groove according to claim 1, wherein a plurality of circumferential retaining grooves (10) are formed in an outer peripheral surface of said small diameter portion (7) so as to be able to retain the adhesive inside the groove in a longitudinal direction. The grip structure of a hand tool described in Crab. 6. An outer peripheral surface of the handle (2) and an outer peripheral surface of the grip member (8) are flush with each other.
A grip structure for a hand tool according to any one of the above.