JPH0985645A - Hammer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely keep a state where the tip part of a hammer handle is pressure-fitted in the through hole of a hammer head part. SOLUTION: The tip part 2a of a hammer handle part 2 is pressure-fitted in a through hole 1a formed in a hammer head part 1, and a spring pin 7 is press-fitted in a crossing hole 4 which pierces the hammer head part 1 and the tip part 2a of the hammer handle part 2 along a crossing direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hammer used for, for example, sheet metal working and fine adjustment of a small boat propeller.

[0002]

2. Description of the Related Art Conventionally, there is a hammer of this type shown in FIG. In this, a tip portion 2a of a hammer handle portion 2 is fitted into a through hole 1a formed in a hammer head portion 1, and a wedge 3 is driven into a tip end surface 2A of the hammer handle portion 2.

[0003]

In the conventional hammer described above, the tip 3a of the hammer handle 2 is simply press-fitted into the through hole 1a of the hammer head 1 by driving the wedge 3. By repeatedly hitting with a hammer,
The impact vibration weakens the press-fitting state, and the hammer handle 2
There is a risk that the hammer head 1 may unexpectedly come off and an accident may occur.

Therefore, the hammer head portion 1 and the hammer handle portion 2
Of the hammer head 1 by inserting a bolt 5 into the transverse hole 4 and inserting a nut 6 into the bolt 5 so as to penetrate the tip portion 2a of the hammer 2 along the transverse direction. It is conceivable to integrally connect the hammer handle portion 2,
Even with this, the nut 6 is easily loosened by the vibration of the impact, and it becomes difficult to maintain the state in which the tip end portion 2a of the hammer handle portion 2 is press-fitted into the through hole 1a of the hammer head portion 1.

In view of the above problems, it is an object of the present invention to provide a hammer capable of securely holding the state in which the tip of the hammer handle is press fitted or screwed into the through hole of the hammer head. I am trying.

[0006]

The structure of the present invention for achieving the above object will be described with reference to the drawings corresponding to the embodiments. The tip 2a of the hammer handle 2 is press-fitted into the hole 1a, and a transverse hole 4 is provided which penetrates the hammer head 1 and the tip 2a of the hammer handle 2 in the transverse direction. A spring pin, a spring roll, or a roll pin (hereinafter referred to as a spring pin) 7 is press-fitted in the structure.

In the above structure, when assembling the hammer, the tip 2a of the hammer handle 2 is press-fitted into the through hole 1a of the hammer head 1 and then the tips of the hammer head 1 and the hammer handle 2 are inserted. It suffices to form a transverse hole 4 along the transverse direction with the portion 2a and press the spring pin 7 into the transverse hole 4 for press fitting.

In this case, the hammer head 1 is blocked by the spring pin 7 which is press-fitted into the transverse hole 4 and the hammer head portion 2 is moved.
The spring pin 7 does not come out from the tip end portion 2a, and the spring pin 7 is elastically deformed and comes into pressure contact with the inner surface of the transverse hole 4, so that the spring pin 7 comes out of the transverse hole 4 even if the hammer is repeatedly hit. In this way, the state in which the tip portion 2a of the hammer handle 2 is press-fitted into the through hole 1a of the hammer head 1 can be reliably retained for a long period of time.

According to the second aspect of the present invention, the tip 2a of the hammer handle 2 is screwed into the through hole 1a formed in the hammer head 1, and the hammer head 1 and the tip 2a of the hammer handle 2 are connected to each other. It is also possible to adopt a configuration in which a transverse hole 4 penetrating in the transverse direction is provided, and a spring pin 7 is press-fitted into the transverse hole 4.

In the above construction, when assembling the hammer, the female screw portion formed in the through hole 1a of the hammer head 1 is screwed with the male screw portion formed at the tip portion 2a of the hammer handle portion 2 and then the hammer is formed. Head 1 and hammer handle 2
Forming a transverse hole 4 along the transverse direction at the tip 2a of
It suffices to drive the spring pin 7 into the transverse hole 4 and press it into place.

In this case, the hammer head 1 is blocked by the spring pin 7 which is press-fitted into the transverse hole 4 and the hammer head portion 2 is moved.
The spring pin 7 does not come out from the tip end portion 2a, and the spring pin 7 is elastically deformed and comes into pressure contact with the inner surface of the transverse hole 4, so that the spring pin 7 comes out of the transverse hole 4 even if the hammer is repeatedly hit. It is possible to reliably hold the state in which the tip end portion 2a of the hammer handle portion 2 is screwed into the through hole 1a of the hammer head portion 1 for a long period of time.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the invention described above, a configuration is employed in which the base portion 2b of the hammer handle portion 2 is provided with the grip portion 10 for preventing slippage.

According to the above construction, there is no risk of the hammer handle 2 slipping off between the fingers when hitting with a hammer, and sheet metal working or the like can be easily performed.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a hammer according to a first embodiment of the present invention, in which a tip 2a of a hammer handle 2 is fitted into a through hole 1a of a hammer head 1 and then the hammer By driving the wedge 3 into the tip surface 2A of the handle 2, the tip 2a of the hammer handle 2 is press-fitted into the through hole 1a of the hammer head 1, and then the hammer head 1 and the hammer handle 2 are inserted. A transverse hole 4 is formed by drilling the tip portion 2a along the transverse direction with a drill, and a spring pin 7 is driven into the transverse hole 4 for press-fitting.

The hammer head 1 is made of metal such as aluminum, copper, brass and iron and is suitable for hot working. Further, for example, in the case of sheet metal working or fine adjustment of a small boat propeller. It is preferable to use the hammer head 1 made of a relatively soft metal such as aluminum, copper, or brass. In particular, the aluminum hammer head 1 is advantageous in that it is lightweight, easy to handle, and inexpensive.

The hammer handle 2 is made of wood, and a wedge 3 is driven into the tip surface 2A of the hammer handle 2, so that the tip 2a of the hammer handle 2 is securely press-fitted into the through hole 1a of the hammer head 1. ing.

The spring pin 7 is formed by rolling an elastic strip-shaped metal plate such as a steel plate into a cylindrical shape. For example, the outer diameter R is 5 mm, and the outer diameter R is slightly smaller than the outer diameter R (for example, r. By being press-fitted into the transverse hole 4 (4.8 mm), it is elastically deformed and comes into pressure contact with the inner surface of the transverse hole 4. Although the single-winding spring pin 7 is shown, a multi-winding spring pin 7 may be used.

According to the above construction, since the spring pin 7 is elastically deformed and comes into pressure contact with the inner surface of the transverse hole 4, the spring pin 7 does not slip out of the transverse hole 4 even if the hammer is repeatedly hit. The state in which the tip portion 2a of the hammer handle portion 2 is press-fitted into the through hole 1a of the head portion 1 can be reliably retained.

FIG. 4 shows a hammer according to a second embodiment of the present invention, in which a male screw portion 8 is formed on a tip portion 2a of a hammer handle portion 2 made of a steel pipe or an iron pipe, and the male screw portion 8 is formed. After being screwed into the female threaded portion 9 formed in the through hole 1a of the hammer head 1, the hammer head 1 and the tip 2a of the hammer handle 2 are traversed by drilling along the transverse direction. A hole 4 is formed, and a spring pin 7 is driven into the transverse hole 4 for press fitting. Since the configuration other than the above is almost the same as that of the first embodiment shown in FIGS.

According to the above construction, since the spring pin 7 is elastically deformed and pressed against the inner surface of the transverse hole 4, the spring pin 7 does not come out of the transverse hole 4 even if the hammer is repeatedly hit. The state in which the tip portion 2a of the hammer handle portion 2 is screwed into the through hole 1a of the hammer head 1 can be reliably retained.

A gripping portion 10 made of rubber or a synthetic resin material is provided at the base end portion 2b of the hammer handle portion 2 so that the hammer handle portion 2 can be removed from between the finger portions when hit by a hammer. There is no risk of slipping off, and sheet metal processing can be easily performed. It should be noted that it is preferable to provide the non-slip grip portion 10 also on the base end portion 2b of the hammer handle portion 2 of the hammer shown in FIGS.

[0022]

According to the first aspect of the present invention, the spring pin is press-fitted into the transverse hole penetrating the hammer head and the tip of the hammer handle in the transverse direction.
The head of the hammer does not come out of the tip of the hammer handle by being blocked by the spring pin, and the spring pin elastically deforms and presses against the inner surface of the transverse hole, so even if the hammer is repeatedly hit. The spring pin does not come out of the transverse hole, and the state in which the tip of the hammer handle is press-fitted into the through hole of the hammer head can be reliably retained for a long period of time.

According to the second aspect of the present invention, similarly to the first aspect of the present invention, the spring pin in which the hammer head portion and the tip end portion of the hammer handle portion are press-fitted into the transverse hole penetrating in the transverse direction. The hammer pin does not come out of the tip of the hammer handle and is elastically deformed and comes into pressure contact with the inner surface of the transverse hole. Does not come out of the transverse hole, and the state in which the tip of the hammer handle is screwed into the through hole of the hammer head can be reliably retained for a long period of time.

According to the third aspect of the present invention, since the non-slip grip portion is provided at the base end portion of the hammer handle portion, when the hammer strikes, the hammer handle portion 2 slips from between the finger portions. There is no risk of it coming off, and sheet metal processing and the like can be easily performed.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a hammer which is a first embodiment of the present invention.

FIG. 2 is a cutaway front view of the same part.

FIG. 3 is an exploded view of the same.

FIG. 4 is a partially cutaway side view of a hammer which is a second embodiment of the present invention.

FIG. 5 is a perspective view showing a conventional example.

[Explanation of symbols]

 1 Hammer Head 1a Through Hole 2 Hammer Handle 2a Hammer Handle Tip 2b Base Hammer Handle Base 4 Cross Hole 7 Spring Pin 8 Male Thread 9 Female Thread 10 Non-slip Grip

Claims (3)

[Claims] 1. A through hole formed in a hammer head has a tip portion of a hammer handle portion press-fitted thereto, and a transverse hole penetrating the hammer head portion and the tip portion of the hammer handle portion in a transverse direction is provided. A hammer having a spring pin press-fitted into the transverse hole. 2. A through hole formed in a hammer head has a tip portion of a hammer handle portion screw-fitted thereto, and a transverse hole penetrating the hammer head portion and the tip portion of the hammer handle portion in a transverse direction is provided. A hammer having a spring pin press-fitted into the transverse hole. 3. The hammer according to claim 1, wherein a non-slip grip portion is provided at a base end portion of the hammer handle portion.