JPH0445743Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a handle for a ball-hitting tool, such as a gateball stake, in which split handles are joined by screws.

(Prior art) As a conventional technology, as shown in Fig. 2 and Fig. 3,
A screw is inserted in the center of the end of the first shaft, a cylindrical body is protruded in the longitudinal direction around the periphery, and the end of the second shaft connected to the first shaft is fitted into the cylindrical body. A ball-hitting tool handle has been proposed that is provided with an insertion portion that is flexible and has a protrusion around the insertion portion, and a female thread that engages with the male thread.

(Problem to be solved by the invention) With the above-mentioned means, when joining shafts, the friction between the protrusion provided on the insertion part and the inner surface of the cylindrical body prevents the screw from loosening. Ta. In the process of screwing together the screws, the protrusions provided on the insertion part are elastically deformed by the inner surface of the cylindrical body, and the friction caused by the restoring force of the elastically deformed protrusions causes each shaft to Measures were taken to prevent loosening.

However, in order to make each shaft freely disassembleable, this frictional force cannot be made larger than necessary, and therefore there is a limit to the loosening prevention effect.
Furthermore, when the shaft is assembled, the protrusions serving as the locking means are always elastically deformed, and when the shaft is assembled and disassembled, the surfaces of the protrusions are constantly subjected to friction, shortening the life of the protrusions.

As described above, the conventional techniques described above are insufficient to securely fix the shaft, and there are also problems with the durability of the locking means.

Therefore, the purpose of this invention is to provide a ball batting ball that connects split handles with screws, which can reliably prevent loosening of the split handles and provide stable locking performance over a long period of time. The purpose is to provide the handle of the tool.

(Means for solving the problem) The present invention forms a female thread having a small thread diameter along the axis in the handle of a ball hitting tool in which the shaft part and the operating grip are connected by a screw, a shaft portion having a flange portion at one end; a male thread having a large diameter along the axis at one end; an operating grip portion with a protruding male thread that engages with the female thread; a female thread that fits the large diameter male thread formed on the operating grip portion at one end; and an engagement surface that engages with the flange portion of the shaft portion. The above-mentioned problem has been solved by having a locking member that fits into the shaft portion.

(Function) During use, the shaft part and the operating grip part are connected by screwing together the female thread formed on the shaft part and the male thread with a small thread diameter formed on the operating grip part, and then the shaft part and the operating grip part are connected. By screwing together the female thread of the locking member fitted to the part and the large diameter male thread formed in the operating grip part, the engagement surface of the locking member engages and presses the collar part of the shaft part. The end surfaces of the shaft portion and the operating grip portion are crimped to prevent loosening of the threaded engagement between the internal thread formed on the shaft portion and the external thread having a small thread diameter formed on the operating grip portion. , fix the shaft part and operating grip part.

In addition, when carrying the shaft, completely unthread the locking member and the operating grip, then unthread the female thread on the shaft and the male thread with a small diameter on the operating grip, and then remove the shaft. and the operating grip section.

(Example) Examples of the present invention will be described in detail below based on the drawings.

In FIG. 1, the handle 1 of the ball-hitting tool has a grip body 3 and one end thereof having the same diameter as the grip body 3, and its end face is fixed to one end of the grip body 3, while the grip body 3 is attached to the other end. It has a diameter smaller than that of the bolt, and has a bolt installation member 2 formed with a male thread around it.

A reinforcing ring 4 is fitted around the outer periphery of the joint between the bolt installation member 2 and the grip body 3 to strengthen the bonding force between the bolt installation member 2 and the grip body 3. Further, a stud bolt 5 having a rectangular cross section is fitted and fixed to the bolt stud member 2 at its implant portion, and the grip body 3 has a decorative ring 6 at the other end.
is fitted, and an end piece 7 is further fixed to form an operating grip portion 9.

The outer periphery of the grip main body 3, excluding the parts where the reinforcing ring 4, decorative ring 6, and end piece 7 are attached, is covered with a covering material 8 such as synthetic resin-impregnated glass fiber with a high coefficient of friction, and the operating grip is The operability of section 9 is improved.

An outer cylinder 22 having a straight part 11 made of synthetic resin and a collar part 12 at one end with a large diameter is fixed to the shaft part 10 having a shaft 24 with a tapered outer circumference, and a stud bolt 5 is inserted therein.
A female thread is formed to fit the

The locking member 13 is made of a cylindrical body having two different inner diameters and a part formed with a female thread that matches the male thread installed in the bolt installation member 2, and the inner diameter of one end is the same as the straight part of the outer cylinder 22. 11, and the inner diameter of the central part is the same as the outer cylinder 22.
It is dimensioned so that it can be slidably fitted to the flange portion 12 of the flange portion 12, and an engagement surface 23 is formed therebetween;
A female thread is formed at the other end, and the axial length of each inner peripheral portion is such that the length of the portion of the outer cylinder 22 that is fitted into the collar portion 12 is shorter than the thickness of the collar portion 12;
The sum of the length of the part of the outer cylinder 22 that fits into the collar 12 and the length of the part where the female thread is formed is the length of the outer cylinder 22.
It is configured to be smaller than the sum of the thickness of the flange portion 12 and the maximum length of the external thread formed in the bolt installation member 2.

When the handle 1 of the ball hitting tool having the above-described configuration is used, the shaft part 10 and the operating grip part 9 are connected by screwing together the internal thread provided on the shaft part 10 and the stud bolt 5. be done. Furthermore, a bolt installation member 2 and a locking member 1 are provided.
3 are strongly screwed together, the collar portion 12 of the outer cylinder 22 fixed to the shaft portion 10 is strongly pressed against the end surface of the bolt installation member 2 by the engagement surface 23 of the locking member 13, and the shaft portion 10 and operating grip part 9
is securely fixed.

Furthermore, when carrying the product, the shaft portion 10 is removed from the stud 5 after unscrewing the locking member 13 and the bolt planting member 2.

(Effects of the invention) As described above, according to the invention, the divided shaft part and the grip body are joined by screws, and the shaft part and the grip body are further joined by the locking member. Since the end faces of the joints are crimped and securely fixed, the screws at the joints will not loosen. Furthermore, since the locking means of this invention does not include means that utilize deformation or friction, stable locking performance can be obtained over a long period of time.

[Brief explanation of the drawing]

Fig. 1 is a detailed view of the main parts of the handle of the ball-hitting tool according to the embodiment of the present invention, Fig. 2 is a perspective view showing the handle of the ball-hitting tool according to the prior art, and Fig. 3 shows the threaded part of the handle of the ball-hitting tool according to the prior art. FIG. 1...Handle of ball hitting tool, 2...Bolt installation member,
3... Grip body, 4... Reinforcement ring, 5... Studded bolt, 6... Decorative ring, 7... End piece,
8... Covering material, 9... Operating grip portion, 10...
Shaft part, 11...Straight part, 12...Brim part, 13...Loosening member, 14...First shaft, 15...Second shaft, 16...Male thread, 17...Cylindrical body , 18... insertion section, 19...
Projection, 20...Female thread, 21...Threaded part, 22...
...outer cylinder, 23...engaging surface, 24...shaft.

Claims (1)

[Scope of utility model registration request] In the handle of a ball hitting tool in which the shaft part and the operating grip are connected by a screw, a female thread having a small thread diameter is formed along the shaft center, and the shaft part has a collar part at one end, and the shaft part has a collar part at one end, and the shaft part has a collar part at one end. an operating grip portion that has a male thread with a large diameter formed along the axial center from the end face of the male thread, has a smaller thread diameter than the male thread along the axis from the end face of the male thread, and has a protruding male thread that is screwed into the female thread; and a locking member that engages with the shaft portion, the locking member having one end having a female thread that fits the large diameter male thread formed on the operating grip portion, and an engagement surface that engages with the collar portion of the shaft portion. A handle of a ball hitting tool characterized by consisting of.