JP2000190253A - Hammer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and perfectly remove concrete limewash adhered to a formwork without labor, by forming a projecting piece that vertically projects from a side surface except for the bottom surface of a hammering portion, preferably both ends of the upper surface and shaves and removes the concrete limewash. SOLUTION: A hammer head portion 1 comprises a hammering portion 3 defining a nail hitting surface 2 which is linear in its one upper edge and a nail removing portion in a substantially V-shaped groove form that is locked at the head of the nail and removes it at the other side. Projecting pieces 6, 7 are respectively vertically projected from both ends of the upper surface of the hammering portion 3. The projecting pieces 6, 7 are integrated with the hammer head portion 1, and are both formed linearly on their top surfaces and square-shapedly at their outer edges. Their corners abut to a formwork or a crosspiece surface in parallel so as to easily shave concrete limewash. Thus, when the concrete limewash adhered to the formwork is shaved and removed, a handle portion 5 does not disturb the work.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hammer with nails used for concrete formwork or the like.

[0002]

2. Description of the Related Art Conventionally, a hammer of this type has a hitting portion having a hitting surface of a nail formed at one end surface, and a substantially V-shaped groove-like pulling portion which can be hooked on the head of the nail and pulled out. Is generally formed of a hammer head integrally formed with a hammer head and a handle fixed to the hammer head. Concrete formwork is performed by repeating assembly work, concrete casting, and demolding work, but since formwork is diverted and used many times,
Concrete slag adheres to the surface of the formwork after demolding and to the reinforcing pier attached to the periphery of the formwork. Before the assembling work, because those concrete slags are very obstructive to assemble the formwork without gaps and with high accuracy
These molds were cleaned using a special tool, a so-called keren rod, to scrape off the concrete slag. However, since the concrete slag is not always completely removed by this work, it was necessary to remove the concrete slag partially left during the assembling work. As a method, the concrete hammer was hit with a hammer and rubbed in place of the hammer to remove it, or a keren rod was prepared separately from the hammer, and the hammer was removed when necessary. In Japanese Utility Model Laid-Open No. 5382/1993, a sharp edge is formed on the bottom of the hammer head like a knife, and the hammer is pulled toward the concrete stalk attached to the side of the concrete formwork. , A method of scraping is disclosed.

[0003]

In the above-mentioned conventional method of hitting with a hammer and rubbing it in place with a hammer, the concrete slag cannot be completely removed. Although it can be removed by using a Keren stick, it must be carried at all times separately from the hammer, and it takes time to change. That is, these operations are very troublesome, and significantly reduce the efficiency of assembling the formwork. In addition, 538
In No. 2, it can be used when the width of the symmetrical surface to be scraped off, such as the side of the concrete formwork or the pier, is narrow, but on the surface of the concrete formwork, the pattern cannot be used and it can not be used. In addition to the fact that the location is very narrow and limited, there is a problem that it takes a very long time to cut off when the concrete slag is thickly and strongly adhered.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and its object is to drive a nail,
An object of the present invention is to provide a hammer that can remove unnecessary nails and can easily and completely remove concrete sticks attached to a concrete form without any trouble.

[0005] As means for this purpose, a hitting portion having a hitting surface of a nail formed on one side and a substantially V-shaped grooved pullout portion which can be pulled out by being hooked on the head of the nail are formed on the other side. In a hammer comprising a hammer head and a handle fixed to the bottom surface of the hammer head, at least one or more protruding pieces for shaving off concrete slag are formed on at least one side surface except the bottom surface of the hitting portion. And Further, the protruding piece is vertically protruded from both ends of the upper surface of the hitting portion, or the upper end edge of the hitting surface of the nail is formed in a straight line.

[0006] According to the above structure, a projecting piece is formed on the side surface of the hammer, excluding the bottom of the hitting portion, for shaving off the concrete slag, so that the shank becomes an obstacle when shaving the concrete slag attached to the formwork. Absent. That is, the range of use is not limited by the part of the concrete formwork. Since the upper edge of the nail hitting surface is formed in a straight line, the hit side becomes larger, so even if the concrete slag is thick and strongly adhered, it can be easily broken by the side of the straight part. This is to solve the conventional problem.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a side view of the embodiment of the present invention, FIG. 3 is a plan view of the embodiment of the present invention, and FIG. 4 is a sectional view taken along line AA of FIG. . 1
Is a hammer head, one of which has a hitting portion 3 having an upper side forming a hitting surface 2 of a nail having a linear shape, and the other has a substantially V-shaped groove-like nail pulling portion 4 which is hooked on the head of the nail and pulled out. Reference numeral 5 denotes a handle fixed to the bottom surface of the hammer head 1. Reference numerals 6 and 7 denote projecting pieces which project vertically from both ends of the upper surface of the hitting portion 3 and are formed integrally with the hammer head 1. The protruding pieces 6 and 7 are both formed with a straight upper end surface and a square outer edge, so that the corners abut against the formwork and the pier surface in parallel, so that the concrete slag is cut. Make it easier. As shown in FIG. 5, by forming the upper end surfaces of the protruding pieces 6 and 7 in an arc shape and concentrating the shaving force,
It is also possible to make it easy to scrape off the strongly adhered concrete slag, or to make the shape of the convex and concave portions of which the tip is sharpened continuous so that the concrete slag can be easily scraped off.

[0008] Further, with respect to the position where the projecting piece is formed, two pieces project from the side face of the hitting portion at an arbitrary angle, respectively.
A shape that is symmetrical or asymmetrical with respect to the axis of the beating portion, a shape in which a piece extends at an arbitrary angle,
Various shapes such as a shape in which one or more pieces extend at an arbitrary angle can be inferred. However, as shown in FIG. Is preferably symmetrical with respect to the center of the axis in consideration of the balance when nailing, etc., but is not particularly limited to this.

Next, a method of using the embodiment of the present invention will be described. FIG. 7 is a view showing the state of use of the embodiment of the present invention. In the method of removing the concrete bar B attached to the concrete form A, the handle 5 is held by hand, and one of the projecting pieces 6 is connected to the concrete bar B. It can be scraped off by pressing it. Further, when the concrete slag is thickly and strongly attached, the concrete slag can be scraped off at the upper end edge of the hitting surface 2 and then scraped off with the protruding piece 6.

[0010]

As described above in detail, according to the hammer of the present invention, a projecting piece for scraping off the concrete slag is formed on the side surface of the hammer except the bottom of the hitting portion, so that the concrete slag adhered to the formwork. When shaving, the handle does not become an obstacle. Since the upper edge of the hitting surface of the nail is formed in a straight line, the hitting side becomes large, so that even if the concrete slag is thickly and strongly attached, it can be easily hit by the side of the straight portion. In other words, the hammer of the present invention can easily drive a nail and pull out an unnecessary nail, but also easily attaches a thick and strong concrete slag attached to an arbitrary position of a concrete formwork. In addition, since it can be cleaned neatly, it is possible to improve the working efficiency, and to obtain a hammer that is practically effective, such as being able to assemble the concrete formwork accurately and reliably. it can.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a side view showing an embodiment of the present invention.

FIG. 3 is a plan view showing an embodiment of the present invention.

FIG. 4 is a sectional view taken along line AA of FIG. 2;

FIG. 5 is an explanatory view showing another embodiment of the projecting piece of the present invention.

FIG. 6 is an explanatory view showing another embodiment of the projecting piece of the present invention.

FIG. 7 is a use state diagram of the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hammer head 2 Hammering surface 3 Hammering part 4 Nailing part 5 Handle part 6 Projection piece 7 Projection piece A Concrete formwork B Concrete slag

Claims (3)

[Claims] 1. A hitting portion having a hitting surface of a nail formed on one side,
On the other hand, in a hammer comprising a hammer head integrally formed with a substantially V-shaped groove-shaped nail puller which can be pulled out by being hooked on a nail head, and a handle fixed to the bottom surface of the hammer head, A hammer, characterized in that at least one or more protruding pieces for shaving off concrete slag are formed on at least one side surface except the bottom surface of the hitting portion. 2. The hammer according to claim 1, wherein the projecting pieces project vertically from both ends of an upper surface of the hitting portion. 3. The hammer according to claim 1, wherein an upper edge of the hitting surface of the nail is formed in a straight line.