JPS6147942B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present application provides a method that is effective when finishing concrete over a particularly wide area, such as the floor or earthen floor of a building.

Conventionally, in order to finish the entire floor horizontally, height-marked height members were placed at appropriate intervals on the floor before finishing, and the upper ends of the height-height members were aligned with the finished surface. He was finishing the work with a trowel.
However, with this method, not only does it take a lot of time to arrange the chiko members, but there is a risk that the chiko members may be caught by one's foot during work, and furthermore, finishing between the chiko members has to rely on intuition. Therefore, it is extremely difficult to ensure an accurate horizontal surface, and the difficulty increases as the area of the earthen floor increases.

In view of the above-mentioned difficult work, the present invention has developed a finishing method that eliminates the need to arrange the top and bottom members in advance, thereby greatly saving time for preparation, and ensuring an accurate finish no matter where it is placed. This is what we provide.

The illustrated embodiment will be described in detail below.

In FIG. 1, reference numeral 1 denotes a laser beam emitting device, the housing of which is composed of a base 2 and a rotating frame 3 that rotates with respect to the base 2.

4 is a laser beam B oscillator fixed to the base 2, and the laser beam B is emitted from the emission port 5' provided at the upper end 5 of the oscillator 4, and guided outward via a group of mirrors to be described later. .

Reference numeral 6 denotes a motor fixed to the oscillator 4, and a gear 8 is attached to its rotation shaft 7.

The rotating frame 3 is configured to be rotatable around the laser beam emission port 5', and a gear 9 integrated with the rotating frame 3 meshes with the gear 8, and the motor 6
Rotational force is transmitted from the It is desirable that the rotating frame 3 rotates quickly.

The rotating frame 3 has three mirrors as shown in the figure.
M ₁ , M ₂ , and M ₃ are fixed at predetermined angles and sequentially reflect the laser beam B emitted from the emitting port 5'. That is, laser beam B is a mirror
It is reflected in the horizontal direction by M ₁ and passes through the small hole 10 to the mirror M ₂ , where it is reflected in the vertical direction, further reflected in the horizontal direction by the mirror M ₃ , and then passes through the small hole 11 . radiated to the outside. As shown in FIG. 4, the laser beam B radiated to the outside is radiated in the entire circumferential direction perpendicular to the rotation axis of the rotating frame 3, that is, in the entire horizontal direction, due to the rotation of the rotating frame 3. Become. Note that the positions of mirrors M ₁ , M ₂ , and M ₃ indicated by two-dot chain lines in the figure are such that the rotation frame 3 is exactly
This shows the state when rotated 180°.

G ₁ indicates the floor surface scheduled for finishing, and G ₂ indicates the floor surface before finishing.

Next, the trowel device will be explained according to FIGS. 2 and 3. The trowel device 20 includes a spatula 21 for finishing the surface of concrete, a handle 22,
This spatula 21 is made up of a part of a support 23 extending over the handle 22, and the support 23 has independent light-receiving parts R ₁ , R ₂ , R ₃ ,
R ₄ and R ₅ are arranged in sequence, and notification lamps L ₁ , L ₂ , L ₃ , L ₄ and L ₅ are arranged on the upper surface of the handle 22.

Light receiving part R ₁ is connected to lamp L ₁ , and light receiving part R ₂ is connected to lamp L _2.
The light receiving sections _R5 are provided corresponding to the lamps _L5 , and when the laser beam B is incident on each light receiving section, the corresponding lamps are lit. That is, for example, when the lamp _L4 is emitting light, it can be seen that the laser beam B is incident on the light receiving portion _R4 .

Note that a circuit connecting the light receiving section and the lamp, an amplifier, and a power source (not shown) are installed inside the support 23 and the handle 22.

Next, the laser beam emitting device 1 and the iron device 20
To explain how _to finish _{a floor surface} using Set the height of the laser beam emitting device 1. As a result, the laser beam B is incident on the light receiving portion R ₃ and the lamp L ₃ is lit, so it can be seen that the height of the spatula 21 is maintained accurately.

When the spatula 21 is lowered a little and the laser beam B is incident on the light receiving part _R4 , the lamp _L4 lights up in place of the lamp _L3 , indicating that the spatula 21 has descended too far. Similarly, when Hera 21 goes down further, the lamp
L ₅ lights up, and if you go further down, all the lamps will be off. Similarly, when Hera 21 climbs too high, the lamp _L2 or _L1 lights up to notify you.

When all the lamps are off, the iron device 20
Move up and down to find a place where one of the lamps lights up.

In this way, it is possible to easily finish the floor surface while checking that the lamp is lit. In addition, since the light receiving parts R ₁ to _{R 5} are each capable of receiving light over the entire circumference of the support column 23, they can receive light no matter which direction the iron device 20 faces.

In addition to lamps, other means of indicating the up and down of the spatula 21 include pointer displays using analog meters and sound generation (changes in pitch due to changes in height _K2 , or changes from continuous to intermittent sounds). You can also use means.

Furthermore, the finished floor surface G ₁ is not necessarily limited to a horizontal surface, and by tilting the laser beam emitting device 1 in an appropriate manner, it is also possible to finish the floor surface at an angle, and the distance K ₁ and Adjustment with K ₂ can also be performed on the iron device 20 side.

With the configuration detailed above, even when finishing a wide range of floor surfaces, it is possible to accurately finish the floor surface without slopes or unevenness within an area that does not obstruct the laser beam, with little effort and in a short time. be.

[Brief explanation of the drawing]

Figure 1 shows a cross section of the laser emitting device including the laser oscillator, Figures 2 and 3 show the external appearance of the trowel device as seen from different directions, and Figure 4 shows the state in which the floor is being finished. be. 1... Laser beam emitting device, 3... Rotating frame, 20... Trowel device, 21... Spatula, 22...
Handle, 23... Support, R ₁ ~ R ₅ ... Light receiving section, L ₁ ~
_L5 ...Lamp, _M1 ~ _M3 ...Mirror.

Claims (1)

[Claims] 1. A light beam emitting device equipped with a means for generating a light beam and a means for dispersing this light beam in the horizontal direction is installed, and on the other hand, a light beam emitting device having the function of a plastering trowel and having multiple independent stages in the height direction is installed. By combining a soldering iron device that is provided with light receiving means and outputs a notification signal specifying the light receiving means that has received the light beam when the light beam is incident on at least one of the light receiving means, A method for finishing a floor surface in which the height of a trowel device with respect to a light beam is known and the finished height of the floor surface is thus known.