JPH0426202Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a water splash prevention device for a stone polishing machine for grinding tombstones, stepping stones, and other stone surfaces.

(Prior art) In general, a stone grinder is equipped with a rotary force joint and a water inlet at the center of the top surface of the substrate, and a ring-shaped, chip-shaped, etc. grindstone on the bottom surface, and the grinding wheel is placed on the stone grinding surface.
The grinder is manually or automatically moved on the stone grinding surface while being rotated by a motor mounted on the grinder while supplying cooling water between the grindstone and the grinding surface from the water inlet. However, when polishing a stone surface by attaching a polishing disk with a boss to the main shaft of a polishing machine, since it is a wet process, the water (cloudy water) used to grind the stone surface is splashed onto the worker. In particular, cast metal substrates with diamond chips have multiple window holes to reduce weight, so water splashes not only from the sides of the polishing machine but also from the top, making it difficult for workers to use the apron (rubber apron). However, there was a problem in that it was not possible to prevent the cloudy water from splashing around the neck area, making it difficult to work and obtaining a highly accurate finished surface. As a countermeasure to this problem, it is possible to install a cover on the grinding machine side to prevent water from flying away, but in that case, it is not possible to work while observing the stone surface near the grindstone, which reduces work efficiency.

(Purpose of the invention) The object of the invention is to provide a lightweight and inexpensive water splash prevention device that can be attached to a polishing machine with one touch and does not damage the stone grinding surface.

(Structure of the invention) The present invention is a stone polishing machine that is equipped with a rotary force joint and a water inlet at the center of the upper surface of a substrate having a large number of window holes, and has a large number of grinding wheel chips on the lower surface. A soft, water-impermeable thin plate material cap is attached, which has an annular upper plate that closes the window hole and a cylindrical skirt that is continuously formed on the outer periphery of the upper plate and fits onto the outer peripheral surface of the base plate, and the lower edge of the skirt is constantly grounded by its own weight. This is a water-splatter prevention device for a stone polishing machine, characterized in that the height of the skirt is greater than the total height of the substrate and the chip so that it comes into sliding contact with the surface.

The cloudy water that tries to scatter from the polishing disk is blocked by the soft water-impermeable cap and stays on the stone surface inside the cap, and is discharged all at once when the polishing disk partially protrudes from the edge of the stone.

(Example) Fig. 1 is a partial longitudinal sectional front view of a polishing machine 1 for rough machining.
(boss) and water inlet 4, and has a diamond chip 5 (grindstone) integrally on the lower surface. The joint 3 is fixed to the substrate 2 by a plurality of bolts 6, and a pin 9 provided on the main shaft 8 of the polishing machine is fitted into the pin hole 7, so that the rotation of the main shaft 8 is caused through the joint 3. The signal is transmitted to the substrate 2. Main shaft 8
The cooling water passage 10 inside is connected at its upper end to a cooling water pump (not shown) inside the polishing machine, and at its lower end to a water inlet 4.
It is open onto the stone grinding surface 11 through. The substrate 2 is provided with a plurality of window holes 12 for weight reduction and also as viewing windows, and diamond chips 5 are fixed between adjacent window holes 12 by means such as brazing. The height of the chip 5 is, for example, 8 to 9 mm.

A soft water-impermeable cap 14 is attached to cover the substrate 2 and chip 5 of the polishing disk 1, and the annular upper plate 15 of the cap 14 is in contact with the upper surface of the substrate 2.
A cylindrical skirt 1 continuous to the outer peripheral edge of the upper plate 15
6 is tightly fitted to the outer circumferential surface 17 of the polishing disk 1, and the lower edge 18 of the skirt 16 is in light contact with the stone grinding surface 11. The cap 14 generally has an appearance as shown in Fig. 3, and is made of transparent soft vinyl with a thickness of 0.3 mm, for example, and the skirt 16 is made by overlapping both ends of a strip-like material at the seam 20 in Fig. 3. The outer peripheral edge of the upper plate 15 and the upper end edge of the skirt 16 are overlapped and heat-fused using a high-frequency sewing machine or the like, as shown in the sectional view shown in the upper right corner of FIG. The inner circumferential edge 21 of the upper plate 15 is dimensioned to such an extent that it fits tightly onto the outer circumferential surface of the boss 3.

When performing work by rotating the polishing disk 1 by the polishing machine while supplying cooling water from the water inlet 4 as shown by the solid line arrow, and moving the grinding wheel tip 5 back and forth and left and right while rotating it on the stone grinding surface 11, the tip The cloudy cooling water splashed away by the skirt 5 is blocked by the skirt 6 and is held within the skirt 16 without being scattered outward. This cloudy water stays on the stone grinding surface 11 and forms a water film between the grinding wheel tip 5 and the stone grinding surface 11, thereby performing a cooling and lubricating action. Polishing disk 1 is grinding surface 1
When the skirt 16 is partially removed from the corner 22 of the skirt 16, the cloudy water that has accumulated inside the skirt 16 is discharged all at once as shown by the arrow B.

(Effects of the Invention) As explained above, according to the present invention, the soft water-impermeable cap 14 like a stand shade can reliably prevent water from scattering from the top and side surfaces of the polishing disk 1. Also, since the cap 14 is made of a soft material such as soft vinyl, it is lightweight and easy to handle, and can be attached and detached with a single touch.Since the cap 14 is not made of a hard material, even if it collides with another component, there is a risk that it may break, fly off, or cause injury. There is no In addition, since the cap 14 is made of a soft material, there is no risk of scratching the grinding surface 11 even if the lower edge 18 of the skirt 16 comes into sliding contact with the grinding surface 11, and even when used in a finishing polisher, a beautiful finished surface can be obtained. can get. Furthermore, since the cap 14 of the present invention is lightweight, there is no risk of the polishing disc 1 becoming unbalanced, and does not adversely affect the performance of the polishing disc. Furthermore, even if the grinding wheel tip 5 wears out, the skirt 16 follows, and the lower edge 18 of the skirt wears out together or shifts upward and maintains contact with the grinding surface 11 with the same surface pressure, so that the water splash prevention function is maintained for a long period of time. Maintained stably. The water splashed by the chip 5 from the stone grinding surface 11 is subjected to centrifugal force and pushes the portion of the skirt 16 on the front side in the rotational direction of the chip 5 radially outward.
Since the other parts are recessed, it bites into the outer circumferential surface 17 of the substrate better, rotates together with the substrate 2 while lightly abutting the stone grinding surface 11, and prevents water from scattering from the lower edge 18 of the skirt. At the same time, even if the upper plate 15 receives an upward force from water trying to jump upward from the window hole 12, the cap 14 will not float. Furthermore, by adopting the transparent cap 14 in the present invention, it is possible to proceed with the work while observing the grinding surface 11, and in particular, it is easy to control the grinding machine 1 so that it does not come off the grinding surface to a large extent. Furthermore, if soft vinyl is used, there is little change in hardness even at low temperatures, and scratches on the grinding surface 11 can be prevented as much as possible. Furthermore, by appropriately cutting the lower edge 18 of the skirt 16, it can be used for polishing discs of various sizes, improving versatility.

(Another Embodiment) As the material of the cap, as long as it is soft and water-impermeable, resins other than vinyl chloride, leather, thin plate materials such as cloth can also be used.

[Brief explanation of the drawing]

FIG. 1 is a partially vertical front view of a stone polishing machine to which the present invention is applied, FIG. 2 is a partial bottom view, and FIG. 3 is a perspective view of the cap. 1... Stone polishing machine, 2...
... Board, 3 ... Joint (boss), 4 ... Water inlet, 5
...Whetstone tip, 11...Stone grinding surface, 14...
Cap, 15...Top plate, 16...Skirt.

Claims (1)

[Scope of utility model registration request] In a stone polishing machine that has a rotary force joint and a water inlet in the center of the upper surface of a substrate having a large number of window holes, and has a large number of grindstone chips on the lower surface, an annular upper plate that comes into contact with the upper surface of the substrate to close the window holes. A soft water-impermeable thin plate material cap is attached, which has a cylindrical skirt that is continuously formed on the outer peripheral edge of the cap and fits onto the outer peripheral surface of the substrate. A water splash prevention device for a stone polishing machine, characterized in that its height is greater than the total height of a substrate and chips.