JPS6067068A - Grinder - Google Patents

Abstract

PURPOSE:To enable grinding in the vicinity of wall, in a grinder for concrete, by arranging diamond chips on the outercircumference of rotary drum to form guides in front and rear and making the length of front guide shorter than 1/4 of the length of rear guide. CONSTITUTION:Upon turning on of a switch 7 to drive a motor 1 thus to rotate a rotary drum 3 and to mount the front and rear bases 8, 9 on a concrete plane, grinding is performed by diamond chips 4 arranged on the outercircumference of rotary drum 3 because of the step between the front guide 9 and the outercircumference of rotary drum 3, so the grinder is advanced to perform grinding along a plane. Since the dimension B of the front guide 9 is made shorter than 1/4 of the dimension A of the rear guide 8, it can grind the position near to an obstacle such as wall.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a quarter-sized grinding device that easily and reliably grinds hard materials such as concrete.

Grinding of hard materials such as concrete can be carried out using grinding tools such as disc grinders, but disc grinders have the disadvantage of not being able to form a beautiful flat surface, which limits their use. Ta.

Therefore, we focused on a planer that can easily grind flat surfaces, and created a 4R4 grinding device by replacing the planer blade with a rotary cylinder equipped with a diamond or other tip that can grind hard materials such as concrete. is being attempted.

With such a configuration, the bases formed at the front and rear of the planer work very effectively for flat surface grinding, making it possible to easily and reliably perform flat surface grinding.

However, since planers are originally designed for cutting water, when they are used for hard concrete production, there is a problem that the front and rear bases are not compatible with the grinding conditions of 11:1 rotation. be.

However, in water conservancy, since the material is soft, the blade of the rotary cylinder can cut reliably without being repulsed by the material, and the front and rear bases can be used as guides to ensure stable reeling of the main body. However, the rotating cylinder may be repelled by the grinding surface, leading to problems such as instability.

In addition, if the front and rear bases are too long, it will be difficult to work in corners with walls, and it will be difficult to grind the rotary cylinder.
: We have solved the problem of the base being lifted up by the unevenness of the RTLF cutting surface on the lifting platform, making it difficult to grind properly.

However, forming the base short and covering it improves some of the grinding performance, but all the repulsion of the rotary cylinder during grinding is transferred to the operator's hands, making it unstable and making the surface grinding less beautiful. Became.

Conventionally, despite these problems, it has been used as the most convenient and efficient grinding device, but the places where ωI grinding is performed, such as concrete Since the edges were not able to be ground sufficiently, a grinder green tool had to be used as an auxiliary tool for the corners, which also caused the problem of not being able to achieve a beautiful finish.

The present invention has been made in view of the above circumstances, and it is possible to easily and reliably perform ω [cutting] of concrete floors, etc. inside a building. The purpose is to provide illumination information.

Hereinafter, the present invention will be explained based on one embodiment shown in the drawings. FIG. 1 is a longitudinal cross-sectional view of one embodiment of the grinding device according to the present invention, and FIG. FIG.

In Fig. 1, the grinding device is configured such that the rotation of the electric motor R1 is at a bell (
・The rotary body 3 is configured to be rotated via the rotary body 3, and the rotary body 3 has a tie hair 7 [ndip 4] on the outer periphery.
is provided.

The electric motor 1jΣ and the rotating body 3 are housed in a frame 5 that is integrally formed, and the frame 5 has a handle 6 at the rear thereof, and the handle 6 is equipped with a switch 7.

Furthermore, the lower part of the frame 5 is provided with a guide 8.9 which is laterally formed in a plane.

In the front and rear guides 8.9, the front guide 9 is formed to be shorter than the rear guide 8, and the width B of the front guide 9 is approximately 1 /4 or less.

The shape of the guide 8.9 has a certain width similar to the width of the rotary cylinder 3, and it is stable not only in the front and back directions but also in the left and right directions. It is configured like this.

The guides 8 and 9 after nO have a short height on the plane, and the front guide 9 is slightly higher than the kite 8 at the rear.

However, when processing progresses in the direction of the front guide 9, on the plane where the front guide 9 is located, the rotation lIl/,
4jIX is formed so that the processing charge comes into contact with the outer periphery of 113, and the plane on which the rear guide 8 is located is formed 414 so that it coincides with the outer periphery of the rotary cylinder 3.

At a3 in FIG. 2, the grinding device is similar to that shown in FIG.

In this case, the distance between the roller 10 and the rotation 1113 is shortened. In the 4M precept, the electric 1 fire 1 is turned off by operating the device switch 7. The rotating cylinder 3 is rotated.

Then, when the front and rear bases 8.9 are placed and brought into contact with the grinding surface of the concrete plate, etc., the front guide 9 and the outer circumference of the rotary cylinder 3 are aligned at which step and placed on the outer circumference of the rotating circle 3. Concrete that is in contact with Guyamond dip 4
1~ etc. side? IllI will be cut down.

Furthermore, when the grinding device is moved forward, grinding can be performed along the plane of the front guide 9.

In this case, since the distance 11 between the front guide 9 and the rotary cylinder 3 is short, even if there is a wall or other obstacle to grinding at the end of the plane, it is possible to grind Iσ1 at a position J close to the obstacle. Wear.

According to another embodiment shown in FIG. 2, the front side of the embodiment of FIG. 1 is replaced by 9. By moving the roller 10 that is X5, you can get closer to it even if there is an obstacle.

Particularly, in the case of the roller 10, it is convenient because it can smoothly move forward even on the plane of the concrete 1 which has some unevenness.

If the roller 10 is made of elastic material such as rubber, the elastic nozzles of the roller 10 will absorb small irregularities, and the reaction force due to the irregularities will be absorbed by the nozzles. 6, making it more convenient for the worker.

Furthermore, when grinding a hard object such as concrete 1, etc., the impact reaction force during processing is applied to the handle 6, so the grinding device may not be stable during processing. If the rotation is controlled 1ll-J and the reaction force is large, the number of rotations is reduced (σ [impact 1 reaction that can be removed)] and j is reduced, allowing stable work to be performed.

In order for the machining to progress stably like this, the dimensional relationship between the front guide 9 and the rear guide 8 is critical, and the front guide 9 is about 1/4 of the rear guide 8. It has been found that effective C can be obtained by forming the length as follows.

In other words, the blades I to 8 at the rear are necessary for stable machining progress of the (tll grinding device), and the guide 9 at the front is formed to adjust the amount of grinding. Yes, and the relationship between the two (well, considering the rear guide 8, it would be effective if the front guide 9 was smaller than 1/4 of the size of the rear guide 8).

This idea has no problem even if the front kite 9 is short in the longitudinal direction, but if the rear guide 8 becomes short, it becomes unstable, so the rear guide 8 is This is due to the fact that it requires about four times the length or more.

The motor 1 may be a commutator motor or an induction motor, but the rotation speed can be controlled by connecting control elements such as 1) iris resistors in a row and controlling the applied voltage to control the rotation speed. J-ru.

The die A/'[-ntbup 4 provided on the outer periphery of the rotating body 3 is arranged so as to have a good balance against rotation, and also to provide a cutting action on the right row of the concrete 1, etc. A diamond depth 4 is formed.

In other words, the diamond tip 4 protrudes in the radial direction from the outer periphery of the cylindrical rotating body 3.
: When the sea urchin is formed into an IM, it comes into contact with a material such as concrete and obtains a grinding action when rotating.J: Urinary molding.

j: The front guide 9 or 1] - 10 is configured to move perpendicularly to the surface to be machined (154, the plane to be ground is The amount of grinding will be arbitrarily 11I.

As explained above, according to the present invention, in addition to being able to easily grind flat surfaces such as concrete, the dimensions of the front and rear kites are formed to be approximately 1/4 or less of the rear guide. It has the characteristics of being able to reduce the stability of the wall and other obstacles such as walls with a force of J: 1, which is extremely valuable.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of one embodiment of a grinding device according to the present invention, and FIG. 2 is a vertical sectional view of a grinding device according to another embodiment. 3...Rotating body, 4...Gui A2 seven-end dip,
6...Handle, 8...Rear] J1-19.
...Front guide, 10 River Roller. Qh f'l Applicant Co., Ltd.'1 Shibaura Manufacturing Co., Ltd.

Claims (3)

[Claims] (1) Grinding characterized in that a diamond tip is provided on the outer periphery of the rotary cylinder to rotate it, and guides are formed at the front and rear, and the length of the front guide is 1/4 or more of the length of the rear guide. Device. (2) 14 that the front guide was formed by a roller.
A grinding device according to claim 1 of the patent claim. (3) The grinding device described in patent jJ1 or m2, characterized in that the roller is made of a material with elastic horns such as rubber. (/l) The RDL cutting apparatus according to claim 1, 2 or 3, characterized in that the rotary cylinder is driven by an electric motor and has a 4+5 configuration so that the rotation speed can be varied.