JPH0723170Y2 - Mallet - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a temporary mallet used for assembling a form, particularly when driving a nail and constructing a structure made of reinforced concrete.

[Conventional technology]

A utility model registration No. 1324649 (actual publication No. 54-), which was devised by the applicant of the present invention, in which a swelling part (3) for beating was provided on the side of the body part with a temporary frame mallet that has been conventionally used. 028709)
There is.

[Problems to be solved by the device]

The above-mentioned temporary frame mallet is a normal mallet with a narrow gap between the frame plates when the nail is hammered between the frame plates in the temporary frame assembly work when constructing a concrete building or structure. When the nail cannot be hit by the usage method, the nail can be hit with the bulging portion provided on the side surface of the body of the mallet head. However, in this temporary frame mallet, the position of the bulging portion in the body portion is, as shown in FIG. 2, the central portion O of the bulging portion in the body portion.
Is overlapped with the center line AA of the mallet handle (4), and the right side action portion (1 ₂ ) is different in weight from the left side action portion (1 ₁ ), the bulge portion (3) When an object is tapped with, a turning force in the left-right direction centering on the mallet handle is generated on the mallet head, and when the beating surface collides with the object to be hit, for example, the head of a nail, the mallet head and the mallet handle are overlapped as shown in Fig. 6. heavy working portion of of (1 ₁₎ collides with the inclined state not abut in a direction perpendicular to the direction of sinking of nails by rotating the side, the center of the striking force applied to the nail bulging portion (3) It is not concentrated on O and is killed and the nail driving becomes worse,
Since it causes an unstable state such as bending the nail, the handle of the mallet must be firmly grasped in order to prevent the mallet head from rotating during the nail driving operation. Therefore, if such a state continues for a long period of time, the hand becomes exhausted.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a mallet capable of accurately and surely striking the mallet laterally and using the mallet with less fatigue.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, this invention has a mallet head (1) such as a trunk (2) in which the weights of the left side action portion (1 ₁ ) and the right side action portion (1 ₂ ) provided on the mallet handle (4) are not balanced. Side of the body (2) of the mallet head (1), which has a heavy action part (1 ₁ ) on the left side of the hammer and a light weight action part (1 ₂ ) on the left side for pulling out nails. bulging portion (3) is provided, in which tapping the object tapping of a nail or the like by the bulging portion (3), the left operation of the bulging portion (3) Tsuchiatama (1) (1 ₁ ) And the right action part (1 ₂ ) both action parts are provided in a position where the left and right weights of the mallet (1) are balanced. Further bulging portion beating surface (3) (3 ₁₎ may be one which parallel to the axis A-A toward the longitudinal direction of the hammer handle (4), above the Tsuchiatama (1) When an upward sloping surface facing the tapping surface (3 ₁₎ abuts in a straight state to the head of the nail. The beating surface (3 ₁ ) of the bulging portion (3) may be flat or convex arc-shaped, and the beating surface (3 ₁ ) may have a surface with small irregularities.

[Action]

The present invention has the following operations with the above-described configuration.

That is, as shown in FIG. ₂ , the weight of the left acting portion (1 ₁ ) and the right acting portion (1 ₂ ) provided with the bulging portion (3) on the side of the conventionally used body portion (2). The unbalanced mallet is because the bulging portion (3) is attached at a position where the center portion 0 thereof coincides with the center line AA of the mallet handle (4) of the body portion (2), As shown in FIG. 6, the hammer head (1) is difficult to use because the left and right weight balance is lost. However, in this invention, the center 0 of the bulging portion (3) of the hammer head (1) is located at the center. Since the weights of the left side and the right side of the head (1) are balanced and balanced, as shown in FIG. 7, when an object is hit with the bulge (3) of the mallet (1), the hammer head In the case of (1), the impact force concentrates entirely on the central portion O of the bulging portion (3) without breaking the left-right weight balance, and there is no torque that causes the mallet head (1) to rotate. Not only does it have a strong effect on squeezing, but the mallet head (1) does not rotate, so the mallet handle (4) does not rotate, which may have an adverse effect such as exerting an excessive grip force on the hand holding it. Absent.

Furthermore, regarding the rotational force generated by the recoil that the mallet head (1) receives from the hit object via the bulging portion (3) when the object is struck by the bulging portion (3), the center of the bulging portion (3) The distance between the section O and the center line A-A of the mallet handle (4) is small, and unlike the case where the action section ( ₁₁ ) of the mallet (striking section) vigorously strikes an object, the bulging section ( since when hitting the object is intended to tap a small force 3), the rotational force by the rebound is small and not give a burden to the hand holding hammer handle (4), the reverse action unit (1 ₁ ) Is exerted in the direction of canceling the force, and the turning force of the mallet handle (4) is further reduced.

The swelling surface (3 ₁ ) of the bulging portion (3) is a flat surface for a soft material such as wood or plastic, so that it does not damage the opponent, and the striking surface (3 ₁ ) The convex arc shape effectively works for driving a nail or the like and can sink the head of the nail.

Also, when using a mallet, the hammer handle (4) is held by hand and the hammering part of the mallet head is struck on a hit object such as a nail.
When viewed from the hand side, the striking portion makes a circular motion, and therefore, strictly viewed, the striking surface of the striking portion strikes the striking surface obliquely. That is, since the upper side of the hammer head of the striking surface abuts earlier than the lower side in time, hitting a nail or the like causes the head of the nail to be slanted obliquely from above so that the nail is bent or straightened. If it becomes something that cannot be driven in, or if you hit a soft object such as wood or plastic, the corners of the hit surface will bite into and scratch you.

Therefore, in order to bring the striking surface into direct contact with the surface of the striking object, the striking surface (3 ₁ ) of the bulging portion (3) should be slightly inclined upward as shown in FIG. tapping surface (3 ₁₎ the tapping can abut time the beating material surface of the upper side is a little later than the time in contact with the beating material surface on the lower end side upper side and lower side are in contact with the beating material surface simultaneously It will hit the object correctly.

Next, if the striking surface (3 ₁ ) is made a small uneven surface, it will not slip even if the striking surface (3 ₁ ) collides with the hit object when hitting a hard object such as a nail. Have. And this unevenness it is capable without the action of the beating surface (3 ₁₎ is flat ones and convex arc like shape that is obtained given be any one slip.

〔Example〕

 An embodiment of the present invention will be described with reference to the accompanying drawings.

The embodiment of the present invention is a mallet called a temporary frame mallet, in which one end of the body has a slender striking part having a reverse taper shape, and the opposite end has a relatively short nail pulling compared to the striking part. It has a mallet head with a malleable head with a left and right weight balance that has parts, but in addition to this it may be a carpenter's mallet with a reverse taper hitting part and nails on the trunk, Not limited to the embodiment, a bulge portion can be provided as long as the weight of the mallet is left and right and the weight balance is lost.

In the figure, (1) is a mallet head, and the mallet head (1) has a slender trumpet-shaped striking action part (1 ₁ ) on the left side of the body part (2), and a nail on the right side of the body part (2). It is a mallet head that has an action part (1 ₂ ) for hooking and pulling out the head part of the There is. Although the mallet handle (4) is made of reinforced plastic in the embodiment, it is needless to say that it may be made of wood or metal.

(3) is a bulging portion provided on a side portion of the body portion (2), and a nail-like portion is driven between the frame plates, for example, in a narrow place where the action part ( ₁₁ ) for hitting is difficult to use. At any time, the nail can be driven in by using the bulging portion (3). The bulging portion (3) is provided at a position where the mallet head (1) balances the weight on the left and right, that is, at a position near the action portion ( ₁₁ ) which is a striking portion, and its shape is Although the embodiment has a circular shape, it may have a quadrangular shape as well, and the point is not limited to the embodiment as long as it functions as the bulging portion (3).

(3 ₁ ) is a hitting surface for hitting a hit object such as a nail of the bulging portion (3), which is a flat surface and a concave arc surface in the embodiment,
In addition, the hitting surface is not limited to the embodiment as long as it can hit an object to be hit.

In addition, the hitting surface has small irregularities as a slip stopper, but the slip stopper is not limited to the above-mentioned embodiment, and the hitting surface may be a slip stopper.

Furthermore, the embodiment in which the beating surface (3 ₁ ) of the bulging portion (3) is an inclined surface that faces upward of the mallet head (1) is highly practical.

In the embodiment, the bulging portion (3) is provided on the front surface and the back surface of the body portion (2) of the mallet body (1), but this may be only one surface or both surfaces. Of course, the shape of the bulging portion (3) may be different between the front surface and the back surface, for example, the front surface may be a flat surface and the back surface may be a convex arc surface, and the combination thereof is arbitrary.

[Effect of device]

 This invention has the following effects from the above.

According to the first aspect of the present invention, since the bulging portion (3) serving as a beating portion is provided at a position where the left and right weights are balanced in the trunk portion (2) of the mallet (1), the bulging portion (3) Striking surface (3 ₁ )
From the above balance, the hammer head (1) does not rotate around the mallet handle (4) even if the object to be hit is hit with, the tapping force can be concentrated, and good tapping can be performed. The mallet handle (4) does not rotate or bend, and the handle (4) does not rotate, so the hand holding the handle has less fatigue and is easy to use.

[Brief description of drawings]

Drawing is a figure showing the example of a mallet of the present invention, Drawing 1 is a front view, Drawing 2 is a front view of a conventional mallet, Drawing 3 is a top view, Drawing 4 is a magnified head part of Drawing 1. Fig. 5 is a vertical sectional view, Fig. 5 is an enlarged vertical sectional view of a mallet head portion in the second embodiment, Fig. 6 is a diagram for explaining a balance state in a conventional mallet, and Fig. 7 is a balance state in the mallet of the present invention. FIG. 8 is an enlarged vertical sectional view showing the second embodiment of the beating surface, and FIG. 9 is an enlarged vertical sectional view showing the third embodiment of the beating surface. 1: mallet head, 1 ₁ : left acting part, 1 ₂ : right acting part, 2: body part 3: bulging part, 3 ₁ : striking surface, 4: mallet handle

Claims (1)

[Scope of utility model registration request] 1. A bulging portion for hitting an object on a side surface of a body portion (2) of a mallet head (1) in which the left acting portion (1 ₁ ) and the right acting portion (1 ₂ ) have different weights. A mallet head (1) having (3) is supported by a mallet handle (4), characterized in that a bulge (3) is provided at a position where the left and right weights of the mallet head (1) are balanced. Mallet.