JPH03136775A - Grip of tool or the like and method for fixing grip - Google Patents

Abstract

PURPOSE:To restrain a grip from the axial and circumferential movement on a stem for a long time by keeping the discrete engagement of the grip with a tubular core over the whole region thereof through the tubular core previously fixed to the grip portion of the stem to fixedly cover the grip portion of the stem with the grip. CONSTITUTION:A portion of a stem 1 corresponding to a grip portion 3 is supported in a divided metal mold for molding a tubular core. A tubular core 5, provided on the whole surface with a group of recesses 4 or projections, is fixedly molded on the grip portion 3 by a means for forcing hard synthetic resin into the divided metal mold. Next, the grip portion 3 of the stem with the core is similarly supported in the divided metal mold for molding the grip, and the soft synthetic resin is forced into the metal mold to form an engaging portion utilizing the recesses 4 or projections of the tubular core 5.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a grip for tools and a method for fixing the grip, and the tools include a hammer as a hand tool, a golf club as a sports tool, etc. The present invention relates to a grip having appropriate elasticity that is attached to the rear grip portion of the handle, and a method for fixing the grip to the handle handle.

(Prior Art) Although there are many typical tools such as hammers and golf clubs that have a grip attached to the handle, there are many tools that have a grip made of rubber-like elastic material attached to the handle. , fixing means by applying an adhesive between the complement and the grip, or fixing means by interposing a double-sided adhesive sheet coated with a volatile alcohol agent for the purpose of lubrication between the complement and the grip. It was a typical fixing means.

(Problem to be Solved by the Invention) Fixing means using an adhesive or an adhesive sheet to the grip handle of a grip sufficiently maintains a stable fixation state in the initial stage of tools, but as time passes, The adhesion force of the grip gradually weakens due to the sliding force in the axial direction of the handle or the twisting force in the circumferential direction of the handle, which acts on the grip, and the grip becomes axially or circumferentially centered around the grip part of the handle. This results in a slight movement, which prevents the use of stable equipment.

In addition, the installation work, which involves inserting the grip into the grip handle by applying adhesive evenly over a long distance through the long handle insertion hole drilled in the axial direction of the grip, is done manually. Since this is the main focus, considerable skill is required, and there are also problems in terms of work efficiency.

The present invention provides a grip that can maintain the adhesion force of the grip to the grip handle over a long period of time to sufficiently cope with loads applied to the grip part from various directions, and can stably achieve the intended purpose of the grip. At the same time, we have automated the method of attaching the grip to the grip handle, which has traditionally been done manually, to improve work efficiency and create a grip that can mass-produce homogeneous products that are not greatly affected by the skill of the work. The purpose is to provide a fixing method.

(Means for Solving the Problems) In order to achieve the above object, the grip for tools according to the present invention has a cylindrical core made of hard synthetic resin fixed to the grip portion of the handle. .

This cylindrical core has a group of concave portions or convex portions scattered over the entire surface. The core is covered with a rubber-like elastic grip made of soft synthetic resin, and the grip and the core are engaged with each other at a concave or convex portion of the core, and a locking portion is formed at the core. There is. The grip part of the handle and the core are formed by flattening the corresponding parts of the grip part of the handle, or by forming a plurality of convex parts or recesses on the surface of the grip part of the handle. The core is locked at the uneven portion, and the core is fixed to the handle without rotation.

In addition, a hard synthetic resin flange is attached to the rear end of the grip of the handle, and a recess provided in a part of the flange is filled with part of the grip material that also covers the flange. , which inhibits grip movement in many ways.

Further, a part of the end surface of the collar body embedded in the grip is exposed from the end of the grip, so that the end of the grip can be reinforced and accented, and the grip can be used as a second simple striking part.

Next, regarding the method of fixing the grip of tools, the equivalent part of the grip part of the handle is supported in a split mold for core molding, and the hard synthetic resin is press-fitted into the grip part of the handle and the annular cavity in the mold. The first step is to fix the cylindrical core, which has a concave part or a group of convex parts over the entire surface, to the grip part of the handle using a convex part or a group of concave parts provided on the inner surface of the mold. is supported in a split mold for molding a grip, and a soft synthetic resin is press-fitted into the annular gap between the core and the mold to form a locking portion between the core and the grip at the group of concave and convex portions of the core. It is characterized by a subsequent step of molding the grip.

Then, during the previous step, when the core molding die is closed, the grip part of the pipe-shaped metal handle is crushed,
It is characterized by flattening the core, or by forming a plurality of pieces or recesses in advance on the surface of the grip part of the handle, all of which are aimed at fixing the cylindrical core to the handle. It is something.

(Example) Next, a specific example of the grip of the tool according to the present invention will be described with reference to the drawings, taking a hammer as an example of the tool.

FIG. 1 is a partially cutaway front view of a hammer embodying the present invention, and FIG. 2 is an enlarged cut-away end view taken along line A--A in FIG. 1.

A striking part (2) is fixed to the tip of the handle (1), and a grip part (3) at the rear end of the handle has a plurality of recesses (4) made of hard synthetic resin, such as polypropylene resin, over its entire surface. Alternatively, a cylindrical core (5) having a plurality of protrusions scattered therein is fixed,
Further, at the rear end of the grip part (3), a flange body (7) also made of hard synthetic resin has its small diameter part (8') fitted into the end of the handle (1), and the large diameter part ( 8) is mounted in contact with the end of the handle, and a notch-like recess (6) is formed at the periphery of the large diameter portion (8) of this collar body (7). .

The means for fixing the hard synthetic resin cylindrical core (5) to the grip part (3) of the handle is, for example, by flattening the equivalent part of the grip part (3) of the handle so that the core part has an elliptical cross section. (see figure), or multiple 0 pieces (9) (9
) by protruding or cutting a plurality of grooves,
The zero piece (9) or the grooved portion is used to form an engaged state with a part of the cylindrical core (5) covering the core portion (Fig. 3,
(See Figure 4).

A cylindrical core (5) is fixed around the periphery, and a flange body (7) is attached to the end of the cylindrical core (5).
The grip part (3) of the handle is made of a soft synthetic resin, for example, a rubber-like elastic body such as vinyl chloride resin, and the grip (11) is provided with anti-slip means such as a circumferential groove or a group of protrusions on its surface. covered with. A portion of this grip member is filled into a group of recesses (4) provided in the core (5),
Similarly, by filling the notch-shaped recess (6) of the collar body (7) or burying the convex part of the cylindrical core (5) into the grip member, these locking means can be used. A locking portion that suppresses movement and rotation is formed between the grip (11) and the core (5).

In addition, when covering the grip (11), the entire collar body (7) is buried in the grip (11), and the recess (6) of the collar body (7) is buried.
) and the grip (11), the twisting movement of the rear end of the grip (11) is suppressed (see Fig. 1).

In addition, a part of the grip (11) member is filled into the notched cross-shaped recess (65) provided on the end face of the large diameter portion (8) of the collar body (7), and ) is completely exposed from the rear end of the grip (11), and the hard collar body (7) is held to prevent the rear end of the grip (11) from being abraded, or when the hammer grip is used. This allows the rear end of the grip to perform light hitting work, thereby expanding the field of use of the hammer.

The handle of the tool may be suitably selected from a pipe-shaped metal handle, a wooden handle, a reinforced plastic handle mixed with glass fiber, etc. to carry out the present invention.

Next, a specific example of a method for fixing grips on tools will be described with reference to the drawings.

Rear end grip part (3) of the pipe-shaped metal handle of the hammer (1)
The corresponding part is opened between the core molding molds (21) and (21) and supported between them. Split mold (21) (21
) A group of protrusions (22) for forming a group of recesses (4) provided in the one-shaped core (5) are protrudingly provided inside. When the pair of split molds is closed, the grip portion (3) of the pipe is flattened by utilizing the compressive force, and an elliptical cross-sectional portion is previously formed in the core portion. A liquid hard synthetic resin, such as polypropylene 4101, is press-fitted into the annular gap (23) between the split mold (21) and the grip part (3) of the handle using the completely closed split mold, and then open molding is performed. and then press the grip part of the handle (3
) around the entire surface by the protruding piece (22) of the mold,
A cylindrical core (5) provided with a group of recesses (4) formed relative to each other.
) are fixed (Figures 6 and 7).

Alternatively, a configuration may be adopted in which a recess is formed on the inner wall surface of the split mold for core shaping, and thereby a group of protrusions are formed relative to the surface of the cylindrical core (5).

Removed from the split mold for core molding (21) (21),
The rear end of the grip part (3) of the handle (1) of the hammer with a core is made of a hard synthetic resin flange (7) of the same quality as the core member.
It is closed by fitting the small diameter part (8) of the handle, and a notch-like recess (6) is inserted at the end of the handle grip part (3).
8) The large-diameter portion (8)' of the collar body (7) provided at the peripheral edge of l is positioned in engagement with the grip portion (3). This completes the first step. Next, the cylindrical core (5) and the collar body (7)
The portion corresponding to the grip portion of the handle (1) to which the handle (1) is attached opens the split molds (25) for molding the grip (25) and is supported between them.

A liquid soft synthetic resin, such as vinyl chloride resin, is press-fitted into the annular gap (26) between the closed split mold (25) (25) and the core (5), and the core (5) is formed by molding. Using the concave portions (4) group or convex portion group, the grip portion of the handle is formed over the plan of the core and while forming a locked state with the notch-like recess (6) of the collar body (7). A grip (11) made of a rubber-like elastic body is attached to (3).

In addition to the case where the core (5) fixed to the grip part (3) of the handle is covered entirely with the grip (11) as shown in Fig. 1, an example thereof is shown in Fig. 3. , grip (11
) and expose a part of the core (5) from the end of the core (5).
) and the grip (11), it is possible to create an accent effect and to suppress the flip-up phenomenon that tends to occur at the end of the grip (11).

Note that a wide variety of handles such as pipe-shaped metal handles, wooden handles, and reinforced plastic handles mixed with glass fiber can be used as the handles of the tools.

(Effects of the Invention) The grip according to the present invention maintains the interlocking state in which the grip and the core are interspersed over the entire area through the cylindrical core that is fixed to the grip portion of the handle in advance. By fixing the coating to the handle, it is possible to reliably prevent the grip handle from moving in the axial direction or circumferential direction over a long period of time.
A strong and stable grip is directly connected to the stability and safe use of various tools.

In addition, the grip fixing method according to the present invention uses a casting method using a split mold in both the cylindrical core and the subsequent grip molding process, making the molding and fixing work quick and simple. Compared to the conventional fixing work, which focuses on inserting the grip part of the handle into the longitudinal shaft hole of the grip, the workability is superior in many aspects such as mass production, homogeneity, and simplicity. be effective.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of a hammer according to the present invention;
Fig. 2 is an enlarged cross-sectional view taken along the line A-A in Fig. 1, Fig. 3 is a view corresponding to Fig. 1 showing another embodiment, and Fig. 4 is an enlarged cross-sectional view taken along the line B-B in Fig. 5. A cut end view, FIG. 5 is an end view of the grip with a part of the flange body exposed, FIG. 6 is a central vertical cross-sectional view during cylindrical core molding, and FIG. 7 is a line C-C in FIG. 6.
FIG. 8 is an enlarged cross-sectional view taken along line D-'D of FIG. 8. FIG. 9 is an enlarged cross-sectional view taken along line D-'D of FIG. 1... Handle 3... Grip part 4... Concave part 5... Cylindrical core 6.6'... Notch-like depression 1... Flange body 9... Convex column 11...・Grip 2j,, 21...Split mold for core molding 22...Protrusion piece 23...Annular cavity 25...Split mold for grip molding 26...Annular cavity

Claims (1)

[Scope of Claims] 1. A hard synthetic resin cylindrical core having a concave or convex group formed over the entire surface is fixed to the same part of the grip part of the handle, and the core is embedded to form a soft synthetic resin grip. A grip for tools, in which a group of concave portions or convex portions of the core is used to form an engaging portion to cover the grip portion of the handle. 2. The grip for tools according to claim 1, wherein the grip portion of the handle has a flat shape. 3. A plurality of convex portions or concave portions are formed on the grip portion of the handle,
2. A grip for tools according to claim 1, wherein the cylindrical core made of hard synthetic resin forms a locking portion by engaging means with a convex or concave portion of the grip portion. 4. A flange body is attached to the end of the grip part of the handle, and a part of the grip is filled in a notch-like recess provided at the end of the flange body embedded in the soft synthetic resin grip. 2. A grip for implements according to claim 1, wherein said portions form a locking portion. 5. The flange body attached to the end of the grip part of the handle embedded in the grip is such that a part of the grip fills the notch-like recess formed on the end surface of the flange body, and a part of the end surface of the flange body 5. A grip for tools according to claim 4, wherein the portion is exposed at an end surface of the grip. 6. The grip portion of the handle is supported in a split mold for forming a cylindrical core, and a group of concave or convex portions is formed over the entire surface by press-fitting a hard synthetic resin into the split mold. In the preliminary step of molding and fixing the provided cylindrical core to the grip part, the grip part of the handle with the core is similarly supported in a split mold for grip molding, and a soft synthetic resin is press-fitted into the mold to form a cylindrical shape. A method for fixing a grip on tools, which involves a subsequent step of molding a grip that has a locking part using a concave or convex part of a core. 7. A claim in which the grip portion of the pipe-shaped metal handle has a flat portion formed therein by crushing pressure of the grip portion using a closing process of a split mold for molding a cylindrical core. 6. A method for fixing grips on tools as described in 6. 8. The method for fixing a grip for tools according to claim 6, wherein a plurality of convex portions or concave portions are formed in advance in a manner scattered on the surface of the grip portion of the handle supported in the split mold for forming the cylindrical core. .