JPS6125975Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a polishing device for polishing (buffing) the surface of stone, and its purpose is to obtain a good finished surface (gloss). Part of the purpose is to be able to easily form a grinding water flow path and to increase the durability of the vibration isolating rubber.

When buffing stone, it is best to wet the surface of the stone evenly before processing to improve the finish (gloss).
is obtained. However, in general, stone polishing machines have a hollow rotary main shaft that protrudes downward from the main body of the polishing machine, and supply grinding water from there to the center of the processing contact surface (the surface of the stone and the bottom surface of the polishing machine). There is. For example, in the first to sixth grinding stages, it is effective to supply grinding water from the center of the processing contact surface in the sense of increasing grinding efficiency, but in the subsequent buffing stage, it is effective to supply grinding water from the center of the processing contact surface. If grinding water is supplied from the outside, an excessive water film will form on the surface of the stone, stopping the heat generation of the stone, which has an important effect on the polishing effect. In other words, the processing atmosphere is destroyed and a good finished surface cannot be obtained. As a countermeasure to this problem, if the water is stopped during the buffing process, the stone will generate too much heat, resulting in the same problems as when there is too much water. Therefore, with conventional equipment, each time the buffing process begins, it is necessary to turn off the water by operating a pot and manually sprinkle water from outside, which not only requires training but also requires time and effort. It was hot.

In this invention, a plurality of radial grinding water channels are provided on the table (base) of the buffing machine, which communicate with the hole in the main shaft, and the grinding water is spread through these channels onto the stone surface surrounding the polishing machine. As a result, even during buff finishing, grinding water can be supplied to the stone surface without damaging the condition of the machining contact surface, and a good finished surface can be obtained. Next, it will be explained with reference to the drawings.

In FIG. 1 showing a longitudinal section, an annular buffing disk 1 is made of a plastic base 2 and a buff (polishing member) 3 fixed to the bottom surface of the base 2, and the top surface of the base 2 has a central circular recess. Surrounding 4,
A bow-shaped convex portion 5 divided into four equal parts is provided around the circumference,
One nut 6 is cast into each of the four convex portions 5. Between the adjacent convex portions 5, 5 there is a second
As shown in the figure, grooves 7 are provided that extend radially from four locations on the outer periphery of the recess 4, and the upper opening surface of the grooves 7 is covered with a vibration isolating rubber 9, which will be described later. A water flow path 10 is formed.

The anti-vibration rubber 9 is a disc-shaped member with an annular aluminum boss 9a cast in the center.
has screw holes 13 into which bolts 12 for attaching the cylindrical joint 11 are screwed at four locations on the same circumference. Additionally, collars 14 are cast in four locations on the same circumference of the rubber 9 radially outward from the boss 9a.
A bolt 15 is screwed into a nut 6 through this collar 14, and a disc-shaped grinding water passage 16 consisting of a recess 4 and a vibration-proof rubber 9 communicates only with the grinding water flow passage 10 at four points on the outer periphery. The center portion communicates with a hole 17 at the center of the vibration isolating rubber 9.

The joint 11 has a hole 19 provided in the flange 18 at the lower end.
By screwing the bolt 12 into the screw hole 13 through the center hole 2, it is integrated with the vibration isolating rubber 9.
0 has a hole 17 at the lower end and a hollow rotating main shaft 2 at the upper end.
It is connected to a water faucet (both not shown) through a hole 22 in the interior of the housing 1 and a tap, hose, etc. The rotating main shaft 21 is an output shaft of the polishing machine (not shown), projects downward from the polishing machine body, and has a pin 24 that engages with the L-shaped groove 23 of the joint 11. pin 2
4 extends outward on the same diameter from the same height part of the outer cylinder surface of the main shaft 21, while two L-shaped grooves 23 are provided in the joint 11 at positions facing the pins 24, Therefore, in order to connect the joint 11 to the rotating main shaft 21, lift the joint 11 and fit it onto the lower end of the main shaft 21, and fit the vertical part of the groove 23 into the pin 24 on the main shaft 21, so that the pin 24 fits into the bottom of the groove 23. The joint 11 can be prevented from coming off from the main shaft 21 by lifting the joint 11 until it reaches the position and turning the successor hand 11 in the opposite direction to the rotating direction of the main shaft 21. Polishing board 1
The anti-vibration rubber 9 and the joint 11 are usually treated as a combined unit as shown in FIG.

When performing buffing, attach the unit shown in Figure 1 to the main shaft 21, and rotate the main shaft 21 at 300 to 800 rpm.
Rotate at a predetermined number of rotations, simultaneously open the kettle by a predetermined amount, and pass through the hole 22 in the main shaft 21 to 100c.c./
The lower surface of the buff 3 is applied to the stone surface 25, and the polishing work is carried out while changing the position of the buff 3 on the stone surface 25 by manually operating the polishing machine. The grinding water flows out into the hole 20 in the joint 11 while being pressed against the inner surface of the rotating hole 22 by centrifugal force, and within the hole 20, an annular water film is formed along the inner circumferential surface of the hole 20 due to the centrifugal force. It descends while being formed, passes through the inner peripheral surface of the hole 17 in the center of the vibration isolating rubber 9, enters the grinding water passage 16 as shown by arrow A, and passes through four flow channels 10 from the outer peripheral part to arrow B. As shown in the figure, it scatters radially outward and is scattered on the stone surface 25 away from the buff 3. That is, although a hole is formed in the center of the base 2 and the buff 3, grinding water is not supplied to the center of the processing contact surface (does not flow in the direction of arrow C) due to centrifugal force.

As explained above, in the present invention, a plurality of radial grinding water channels 10 are provided on the upper surface of the polishing disk 1 and communicate with the hole 22 in the main shaft 21, so that during the polishing operation when the polishing disk 1 is rotating, Since grinding water is no longer supplied to the center of the processing contact surface between the lower surface of the buff 3 and the stone surface 25, the contact between the lower surface of the buff 3 and the stone surface 25 is promoted, which is necessary for polishing. The heat generation of the stone surface 25 can be maintained to a certain degree. Moreover, as the lower surface of the buff 3 changes its position on the stone surface 25, it comes into contact with the grinding water that has been sprayed in advance from the channel 10 and is appropriately cooled, causing abnormal heat generation on the stone surface 25 and abnormality in the buff 3. Wear and tear can be avoided.

Comparing the brightness of the stone surface 25 after polishing for a predetermined time when the same amount of water is supplied from the center of the processing contact surface and when it is sprinkled around the polishing disk from the channel 10 according to the present invention. In the former (conventional method), the brightness was 70 to 80 degrees, and there was no change from the brightness at the end of the previous process, whereas in the latter (this invention), it was confirmed that the brightness reached 90 to 93 degrees, the highest for stone materials. Ta.

Furthermore, in the present invention, the polishing disk 1 and the cylindrical joint 11
A central hole 17 communicating with a hole 22 in the main shaft 21 between
An annular anti-vibration rubber 9 is interposed therebetween, and a concentric circular recess 4 and grooves 7 extending radially from the outer periphery of the concentric circular recess 4 are provided on the top surface of the polishing disc 1, and the outer periphery of the anti-vibration rubber 9 is connected to the protrusion between adjacent grooves 7. 5 is tightened to form a plurality of radial grinding water channels 10 communicating with the hole in the main shaft 21 between the upper surface of the polishing disk 1 and the lower surface of the vibration isolating rubber 9.
The following special effects can be obtained. That is, there is no need to drill holes in the base 2 or the cylindrical joint 11 of the buffing machine 1 to form the grinding water flow path 10, and by simply attaching the anti-vibration rubber 9 to the hub polishing machine 1, the upper surface of the polishing machine can be easily removed. A grinding water flow path 10 is formed by closing the circular recess 4 and the groove 7 with the anti-vibration rubber 9, making machining extremely easy. Moreover, according to the present invention, if the amount of grinding water supplied to the friction portion between the buff 3 and the stone surface 24 is reduced and heat generation is promoted so as to increase the polishing effect on the stone surface, the The anti-vibration rubber may change in quality due to heat, reducing the anti-vibration effect or, in extreme cases, causing damage. However, according to the present invention, the anti-vibration rubber 9 is inserted into the circular recess 4.
Since it faces the grooves 7 and comes into direct contact with the grinding water, the vibration isolating rubber 9 is appropriately cooled, and as a result, the elasticity of the vibration isolating rubber 9 is maintained at an optimum value, increasing its durability. In addition, since the vibration isolating rubber 9 is fastened to the outer circumferential convex portion 5 of the polishing disc 1 with bolts 15 or the like at its outer peripheral portion, the flexibility between the polishing disc 1 and the cylindrical joint 11 is increased, and the buff 3 is removed from the drive system. The vibrations applied to the pressure contact portion of the stone surface 25 are kept to a minimum, and the stone surface 25 is precisely finished and glossy.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of a polishing device to which the present invention is applied, Fig. 2 is a plan view of a single polishing disk in Fig. 1, and Fig. 3 corresponds to Fig. 2 for showing another embodiment. It is a drawing. 1... Polishing disk, 3... Buff (polishing polishing member), 10... Grinding water channel, 11... Joint, 21
...Rotating main shaft, 22...hole.

Claims (1)

[Scope of utility model registration request] A polishing disk 1 having a polishing buff 3 on the lower surface is connected to a hollow rotating main shaft 2 of the polishing machine via a cylindrical joint 11.
1, the polishing device is configured to supply grinding water through a hole in the main shaft 21, in which an annular vibration isolator having a central hole 17 communicating with the hole in the main shaft 21 is provided between the polishing disc 1 and the cylindrical joint 11. A concentric circular recess 4 and grooves 7 extending radially from the outer periphery of the concentric circular recess 4 are provided on the top surface of the polishing plate 1 with a rubber 9 interposed therebetween, and the outer periphery of the vibration isolating rubber 9 is fastened to the protrusion 5 between the adjacent grooves 7. A stone polishing device characterized in that a plurality of radial grinding water passages 10 communicating with a hole in a main shaft 21 are formed between the upper surface of the polishing disk 1 and the lower surface of the anti-vibration rubber 9.