JPH0949314A - Plastering trowel - Google Patents

Abstract

(57) [Summary] [Purpose] The plastering trowel is made easier by finishing the surface of the cement mortar by dropping the corners on both sides of the lower surface of the trowel plate to form an arc-shaped curve. [Structure] Drop the corners on both sides of the lower surface of the plastering iron trowel plate,
It is composed of an arc-shaped curve having a curvature. When leveling cement mortar etc. using this plastering iron and smoothing the surface, both ends of the iron plate are arcuate,
It works so as to ride on the raised part of the mortar surface, and if you also use an ultrasonic oscillator attached to the trowel plate, the water inside the mortar is excited by ultrasonic vibrations and leaks to the surface. When the plastering iron is shaken left and right to make the surface of the mortar smooth, not only the surface of the mortar can be finished with a small amount of force, but it also fits well with the base concrete body and increases the adhesive strength.

Description

Detailed Description of the Invention

FIELD OF THE INVENTION The present invention relates to an improved plastering iron.

2. Description of the Related Art A plastering iron for plastering, which has been widely used in the past, is a means such as welding a back metal on an elastic metal trowel plate having a sharp tip and a ship shape. It was fixed in place, and an inverted L-shaped column base was erected on this spine, and a wooden handle was attached to the column base. With this plastering iron,
When cement mortar was applied to the concrete floor surface or wall surface to finish the concrete surface, the force was applied to shake the plate to the left and right to even out the unevenness of the mortar surface and improve the surface finish. Requires a lot of force and requires a considerable amount of skill to finish the surface smoothly.

[Problems to be Solved by the Invention] Conventional plastering irons require a great deal of force and skill in finishing cement mortar, and there is a problem that mortar is peeled off if finishing is not performed sufficiently. . The plastering iron of the present invention, the corners of the lower surface both ends of the trowel plate are taken and formed into an arc shape,
The purpose is to facilitate the work of leveling and smoothing the mortar by using the ultrasonic oscillator equipped on the trowel.

[Means for Solving the Problems] The plastering iron trowel plate of the present invention is formed into an arc-shaped curve having a curvature by lowering the corners at both ends of the lower surface of the trowel plate. As a result, when the surface of the cement mortar is leveled and smoothed, the surface of the mortar was configured to be excellently combined with the effect of the ultrasonic oscillator installed.

[Operation] Using a plastering iron equipped with an ultrasonic oscillator, when the surface of the cement mortar is leveled and smoothed by the trowel, when ultrasonic vibration is applied to the mortar,
Moisture in the mortar is excited by ultrasonic vibrations and leaches to the surface, so when the plastering iron is shaken left and right to smooth the mortar surface, the lower end of the trowel plate has an arc shape. Therefore, since it acts so as to ride on the protruding portion of the mortar, a large force is not required, and the adhesive force to the concrete body is improved.

[Embodiment] An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall perspective view of a plastering iron according to an embodiment of the present invention. FIG. 2 is a front view of the plastering iron according to the embodiment of the present invention. 3 and 4 show another embodiment of the plastering iron according to the present invention.

A plastering iron 15 shown in FIG. 1 has a piezoelectric vibrator 2 firmly attached to the upper surface of a trowel plate 1 made of stainless steel of a flat plate having a sharp tip and shaped like a ship by using an adhesive. Further, a metal plate 9 is attached to the upper surface of the piezoelectric vibrator 2 by the same method. The iron plate 1 and the metal plate 9 are
The piezoelectric vibrator 2 is sandwiched from above and below, and driving power is supplied to the piezoelectric vibrator 2 to form an electrode for generating ultrasonic vibration on the iron plate 1.

A pedestal 3 is erected on the upper surface of the metal plate 9, and a handle 4 is attached to the upper part thereof. The handle portion 4 is a hollow cylinder, inside which an ultrasonic wave generating circuit 7 and a power source portion 6 composed of a battery are arranged, and by opening and closing a switch 12, the ultrasonic wave generating circuit 7 is driven and a trowel plate is provided. 1 generate ultrasonic vibration. A lead wire 5 is drawn out from the ultrasonic wave generation circuit 7, is connected to the iron plate 1 and the metal plate 9, and driving power is supplied to the ultrasonic vibrator 2.

As shown in FIG. 2, the trowel plate 1 is not formed by cutting the both ends thereof to form a right angle, but is formed by an arc curve 13 having a constant curvature. The presence of the arc curve 13 prevents the unevenness of the mortar surface and the end of the iron plate 1 from colliding with each other when the plastering iron 15 is shaken left and right when the cement mortar is finished to be smooth, and the protruding portion of the cement mortar is The surface of the mortar can be smoothed by riding
As a result, it is provided for the purpose of flattening the surface of the mortar layer without requiring a large force.

The operation of smoothing and finishing the coating of cement mortar using this plastering iron 15 will be described.
When cement mortar is applied to the concrete floor surface with makeup, or when a decorative tile is attached to the concrete wall, the base concrete body and the cement mortar must be completely compatible and adhered. As time goes by, the mortar layer and the base concrete body may be peeled off. Especially when a decorative tile is attached to the wall body, if the tile is peeled off and falls, an accident that may injure a passerby may occur. In order to prevent such an accident, the concrete wall, the cement mortar and the decorative tile must be completely bonded.

First, cement mortar is applied to the concrete body, and the surface thereof is smoothed using a plastering iron 15. Ultrasonic vibration is applied to the iron plate 1, and the vibration energy is applied to the cement mortar. Conducts to the mortar and excites the water contained in the mortar, so that the water is extruded onto the surface of the mortar and penetrates into the surface of the concrete body, so the contact area between the concrete body and the mortar layer is well-adapted, and the adhesion between the concrete body and mortar Power increases.

Further, in the surface layer portion of the mortar, since the lower ends of both ends of the trowel plate 1 have the circular arc curves 13, not only the unevenness of the cement mortar but also the trowel plate 1 rides up, the cement mortar Since it acts to excite water to smooth it, a force for smoothing the surface of the cement mortar does not need to be very large.

The plastering iron according to the present invention is not limited to the above embodiment, and various modifications can be considered. The case shown in FIG. 3 is an example in which an ultrasonic wave generator that is driven by receiving power from a commercial power source is used instead of the storage battery as the power source.
The commercial power source is taken in via the cord 8 and the power source section 14 performs the actions such as voltage, loss, rectification, etc. for driving the ultrasonic wave generation circuit 7. The subsequent operation is the same as that of the above-described embodiment, but this embodiment is limited in workability because it has the power cord 8, but ultrasonic oscillation power is required and sufficient excitation force can be obtained.

In the embodiment shown in FIG. 4, a wooden board iron plate 10 made of a hard material such as oak or cherry is used in place of the stainless steel plate 1, and a metal plate 11 is provided on the upper surface of the wooden board iron plate 10. It is attached and constitutes one electrode to the ultrasonic transducer 2. The lower surface of the wooden board trowel board 10 has a structure having an arc curve 13 having a curvature similar to that of the above-mentioned embodiment, and other parts are the same as those of the above-mentioned embodiment. Since the plastering iron 16 is a wooden board, it is lighter in weight than stainless steel and has improved workability.

[Effects of the Invention] As described above in detail as the embodiments, the plastering iron according to the present invention has various advantages. Since arcuate curved parts with curvature are provided at both ends of the lower surface of the trowel plate, it works so as to ride on the mortar without the end being hit by the unevenness of the cement mortar surface and impairing workability. , The work of smoothing the surface can be easily performed, and the workability is improved. Furthermore, the ultrasonic vibration of the trowel itself excites the water in the cement mortar, so that the water seeps out to the surface of the mortar and adapts to the concrete body to increase the adhesive strength. It has the advantage that it covers and becomes smooth and finishes smoothly. Further, since the iron plate is a wooden plate, the iron itself is light in weight, further improving workability.

[Brief description of drawings]

FIG. 1 is a perspective view of a plastering iron according to an embodiment of the present invention.

FIG. 2 is a front view of a plastering iron according to an embodiment of the present invention.

FIG. 3

FIG. 4 is a view showing another embodiment of the plastering iron according to the embodiment of the present invention.

[Explanation of symbols]

 1: Trowel plate 2: Piezoelectric vibrator 3: Legs 4: Handle part 5: Lead wire 6: Power supply part 7: Ultrasonic wave generation circuit 8: Code 9: Metal plate 10: Wood board iron plate 11: Metal plate 12 : Switch 13: Arc curve 14: Power supply section 15: Plastering iron 16: Plastering iron

Claims (3)

[Claims] 1. A plastering iron equipped with an ultrasonic oscillator comprising a power source section, a high frequency oscillator section and a piezoelectric vibrator,
A plaster for a plasterer, characterized in that both ends of the lower surface of the trowel plate are constituted by curved arc-shaped curves. 2. A plastering iron for a plasterer according to claim 1, wherein the trowel plate is made of a hard wooden board. 3. The plastering iron according to claim 1, wherein a power source portion and a high frequency oscillator portion are provided in a handle portion of the plastering iron.