JPH0742801B2 - Plasterer - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in plastering iron.

[0002]

2. Description of the Related Art A conventional plastering iron of this type (commonly known as an ironing iron) has a back metal made of an elastic metal, and the thickness of the back metal is gradually reduced as it goes forward and backward from a column base. ,
By widening the width to make it easier to bend, this back metal is adhered to the mortarboard, and the pedestal is caulked and fixed to the back metal.
-32680 publication. (Hereinafter referred to as the first example), or a bar-shaped back metal having projections arranged in a row on the lower surface and a tapered pressing metal plate are heat-welded, and an adhesive is applied to the back surface of the pressing metal plate to form a metal plate. The one attached to the mortarboard body (Japanese Utility Model Laid-Open No. 61-28843, hereinafter referred to as the second example), and the like.

[0003]

The plastering iron having the structure of the first example described above does not temper both ends of the back metal (7) made of an elastic metal (usually a hardened steel plate having a thickness of 2.5 to 3.0 mm). While cooling, the work of cutting to the required curved surface is
It required special skill and skill.

Further, in order to plant the column base (5) and fix it by caulking, it is a labor-intensive and careful operation to make a square hole in the back metal made of a hardened steel plate.

Incidentally, in the processing of cutting or drilling a hardened steel plate, no matter how much attention is paid to process control, processing strains often remain during or after the work. The plastering iron with the structure of the second example pushes the rear end of the iron and strongly presses the wall surface with the tip of the iron, so that the thickness of the pressing metal plate is constant and the rigidity of the rod-shaped back metal is high. At the tip of the board and the tip of the bar-shaped back metal, the trowel board does not flex well, so-called "waist breaking"
Occurs, and the workability is impaired.

[0005]

The object of the present invention is to solve the above-mentioned problems, to facilitate the production,
In addition, the purpose of the present invention is to provide a plastering trowel that does not bend or bend at a low price when the plastering work is good.

[0006]

The present invention will be described with reference to the drawings. (1) is an upper structure of a trowel, (2) is a trowel plate, and (3) is a handle. The upper structure (1) includes an inverted L-shaped column base (5) in which the insertion portion (4) to the handle (3) is configured as one body, a spring plate (6), and a metal back cover (7). ), The column base (5), the spring plate (6), and the back metal (7) are inseparably welded to each other. The spring plate (6) is made of an elastic rectangular steel plate, its width is equal to the width of the back metal (7), and its length is longer than that of the back metal (7).

Further, the spring plate (6) projects a little longer in front of the back metal (7) to form a front protrusion (8), and the rear part of the spring plate (6) is flush with the back metal (7). Alternatively, a short rear projection (9) is formed by projecting a short distance rearward. The spring plate (6) horizontally lowers the projecting parts (8) and (9) while making the base part of the front projecting part (8) and the base part of the rear projecting part (9) on the slope (10). And the lower surfaces of the protrusions (8) and (9) are flush with the lower surface of the back metal (7).

Next, (11) was formed under the slope (10),
A gap between the spring plate (6) and the trowel plate (2), (12) is an adhesive, and (13) is a tip of the spring plate (6).

It should be noted that the adhesive (12) is an elastically deformable adhesive that is used even after the bonding, and when the upper structure (1) is bonded to the trowel plate (2), the slope (10) of the spring plate (6) is ) Under the gap (1
Make sure that 1) is also filled with adhesive (12). Further, in FIG. 6 showing an example of the conventional technique, (14)
Is the front cutting part of the back metal (7), (15) is the rear cutting part,
(16) is a caulking part.

[0011]

The plastering iron according to the present invention is constructed as shown in the drawings and described above, and therefore acts as follows. There is no need to cut the front part and the rear part of the back metal (7) made of elastic metal to form the front cutting part (14) and the rear cutting part (15) as in the conventional case. Since it only needs to be molded in advance, it is not only easy to work, but there is no distortion inside the back metal (7) due to cutting, and accordingly, the back metal (7) is distorted, working or trowel. It does not crack or chip during use.

In addition, during plastering work, in order to press the wall (17) with the iron tip, as shown in FIG. 3, when the rear end of the iron is lifted and force is applied to the iron tip, the iron plate (2) Curved wall (17)
The front protrusion (8) and the sloped portion (10) of the spring plate (6) are sufficiently adhered to the trowel plate (2) with the adhesive (12), so the front protrusion (8) And the slope portion (10) bend according to the bending of the mortar plate (2), and transmit the pressing force to the mortar plate (2).

At this time, since the curvature of the trowel plate (2) and the curvature of the spring plate (6) are different, the tip (1) of the spring plate (6) is
As shown in the figure, 3) shifts slightly to the front, but due to the elastic deformation of the adhesive (12), the mortar plate (2) and spring plate (6)
Is not separated from. Moreover, since the adhesive (12) is filled in the gap (11) below the slope (10) of the spring plate (6), the spring plate (6) does not bend abnormally,
Due to the elastic deformation of the filled adhesive (12), the mortarboard (2)
Always flexes well.

Since the column base (5), the spring plate (6) and the back metal (7) are fixed to one body by welding, they are rectangular in elastic steel plate like the conventional back plate (7). You do not have to open the caulking hole.

[0015]

FIG. 1 shows an embodiment of the present invention. In the trowel used for finishing work, the trowel plate: 223 × 73 × 0.5 stainless steel plate back metal: 138 × 27 × 1.5 carbon steel plate spring plate: 185 × 27 × 0.7 spring steel plate The amount of protrusion of the spring plate forward from the back plate: 47 (Unit: mm) Adhesive: Two-liquid modified silicone Miyazaki No. 1 (trade name) manufactured by ThreeBond Co., Ltd. is baked at 150 ° C. for 15 minutes Assembly of upper structure: Plastering iron of the present invention made electric welding is As shown in FIG. 3, when the rear end of the trowel is raised and the tip of the trowel plate (2) presses against the wall (17) surface, the trowel plate (2) and the spring plate (6) do not bend at the waist. A trowel with good workability was obtained with a good degree of bending (so-called “flexibility”) according to changes in the applied pressure.

[0016]

Since the plastering iron of the present invention is constructed and operates as described above, it has the following effects. The front projection (8) and the slope (10) of the spring plate (6) welded and mounted on the rigid back metal (7) are formed by an adhesive (12) that is elastically deformable even after adhesion. Since it is adhered to the trowel plate (2), the front part of the trowel plate (2) has good bending (flexibility) and good workability. -Since there is no need for cutting the front end and the rear end of the back plate (7) made of elastic steel plate or punching a square hole unlike the prior art, it is easy to manufacture, and distortion, cracking, chipping, etc. Since there is no occurrence of defective products such as, the manufacturing cost can be greatly reduced, and the products can be supplied at low cost. -Since the upper structure (1) which is integrated by welding is bonded to the trowel plate (2), the manufacturing process is simple,
Suitable for line work.

[0017]

[Brief description of drawings]

 FIG. 1 is an assembly view of a plastering iron of the present invention, FIG. 2 is a perspective view of the same, FIG. 3 is a partial view showing a usage state, FIG. 4 is a side view of an upper structure, and FIG. FIG. 6 is a side view of another upper structure, and FIG. 6 is a side sectional view of a conventional trowel. In the figure, (1) -upper structure (2) -iron plate (5) -column base (6) -spring plate (7) -back metal (8) -front protrusion (9) …… Rear protruding part (10) …… Slope (11) …… Gap (12) …… Adhesive.

Claims (3)

[Claims] 1. A plastering iron, on a rectangular back metal (7) having rigidity, a spring having a width equal to the width of the back metal (7) and a length longer than the length of the back metal (7). A protrusion (8) in which the plate (6) is overlapped and the spring plate (6) protrudes from the back metal (7).
By forming the base of (9) to be an inclined surface (10), the lower surface of the protrusions (8) and (9) should be flush with the lower surface of the back metal (7). The column base (5) is erected at a predetermined position, and the back metal (7), the spring plate (6) and the column base (5) are inseparably welded to each other to form the upper structure (1). The structure (1) and the trowel plate (2) are adhered to each other with an adhesive (12) which is elastically deformable even after adhering, and the gap (10) between the mortar plate (2) and the slope (10) of the spring plate (6) ( A plasterer characterized by filling 11) with an adhesive (12). 2. The plastering iron according to claim 1, wherein the spring plate (6) has a front protrusion (8) only at the front in the longitudinal direction. 3. The plastering iron according to claim 1, wherein the spring plate (6) has a front protrusion (8) at the front in the longitudinal direction and a rear protrusion (9) at the rear.