JPH0621667Y2 - Polishing wheel mounting board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a polishing grindstone mounting substrate mounted on an arm of a conveyor flat surface grinder for building stones or tombstones.

<Prior Art> This type of polishing grindstone mounting substrate that has been commonly used in the past is a tool in which a diamond abrasive grain layer is adhered to the lower surface of a metal substrate and directly fixed to a mounting cassette made of hard resin with metal bolts. Then, the mounting cassette is fitted to the arm of the polishing machine. For this reason, when the tool comes into contact with the corners of the stone material against the positive motion of the polishing machine, the impact destroys the cassette and often causes an accident that the abrasive grain layer adhered to the substrate is damaged. Is.

<Problems to be solved by the invention> However, this kind of tool that uses fine diamond powder for abrasive grains is expensive, and a tool that is once damaged in this way cannot be reused, which is uneconomical. there were.

In view of the above situation, the present invention provides a polishing grindstone mounting substrate that does not damage the cassette because the substrate on which the abrasive grain layer of the tool is formed and the cassette are separated even when the tool is in contact with a stone material or the like during work. It is intended for.

<Means for Solving the Problems> The present invention forms an abrasive grain layer formed by mixing and sintering abrasive grains and diamond fine powder in the center of the lower surface in the longitudinal direction of a rectangular substrate body, and forms both sides of the abrasive grain layer. And a polishing grindstone substrate having a protective resin layer formed in an arcuate shape on an upper portion thereof, and a fitting groove portion on the upper surface of the polishing grindstone substrate, the upper surface of which is a wedge-shaped convex portion, and the dovetail convex portion in the longitudinal direction of the wedge-shaped convex portion A hard rubber mounting cassette in which the above is formed is inserted, and the polishing grindstone substrate and the mounting cassette are integrally fixed by a synthetic resin bolt.

<Operation> Due to the above-described configuration, when a polishing work is performed by bringing an abrasive grain layer formed on the lower surface of the polishing grindstone mounting substrate mounted on the lower end of the mounting arm into contact with a predetermined stone material, a contact impact on the stone material is generated. If it is large, the synthetic resin bolt that directly supports the substrate body on which the abrasive grain layer is formed cannot withstand this impact load and will break. That is, when a shock greater than a certain contact shock is applied, the synthetic resin bolt is broken, the substrate body and the mounting cassette are separated, and the mounting cassette is prevented from being damaged, and the abrasive grain layer formed on the substrate body is on both sides. Protected by the protective resin layer formed on the portion, damage to the abrasive grain layer can be prevented.

<Embodiment> Hereinafter, the present invention will be described with reference to the drawings of an embodiment.

Reference numeral 1 denotes an abrasive grain layer 2 having a constant thickness formed by mixing and sintering abrasive grains and diamond fine powder on the abrasive grain bond surface 1a at the center of the lower surface, and the abrasive grain layer on both sides 1b of the abrasive grain bond surface 1a. Phenolic resin formed by arranging 2 protective resin layers 3 in an arc shape,
A rectangular substrate body made of synthetic resin such as vinyl chloride is provided with a plurality of bolt receiving screw holes 5 at the center of a fitting groove portion 4 provided on the upper surface of the substrate body 1, and screws corresponding to the screw holes 5 are formed. The rectangular substrate body 1 is formed by making a hole 6 in a mounting cassette 7 made of hard rubber that fits in the fitting groove portion 4, and screwing a synthetic resin bolt 8 that breaks under a constant load into the screw holes 5 and 6. Then, the mounting cassette 7 is integrally fixed to form a grinding wheel mounting substrate 9. In this case, the dovetail groove projection 10 formed in the upper longitudinal direction of the mounting cassette 7 is attached to the mounting arm on the polishing machine side.
Insert the dovetail groove 12 notched in 11 from one end side,
A wedge shape 13 formed in the longitudinal direction of the dovetail groove 10 and the dovetail groove 12 is firmly fitted and fixed.

Next, this operation will be described. First, the polishing grindstone mounting substrate 9
By inserting the dovetail groove protrusion 10 protruding from the upper surface of the attaching cassette 7 from the narrow end side of the wedge shape 13 formed in the longitudinal direction of the dovetail groove protrusion 10, the attaching cassette is attached to the attaching arm 11 by the wedge action. 7 is strongly fixed.

Here, in a predetermined polishing operation, the lower end of the polishing grindstone mounting substrate 9 is pressed against a stone material (not shown) and brought into contact therewith to be moved positively to perform the polishing operation.

However, when a part of the mounting substrate 9 is accidentally brought into contact with a corner or the like of the stone material during the work, the protective resin layers 3 protecting the abrasive grain layer 2 from both sides come into contact with the stone material. No. 2 is free from damage, and in some cases, the protective resin layer 3 is only slightly scratched. Further, when a large load is exerted on the corner portion of the stone material and the polishing grindstone mounting substrate 9 is applied, the lowermost substrate body 1 and the mounting cassette 7 are connected by a synthetic resin bolt 8, Since the bolt 8 is broken under a constant load, the board body 1 is separated from the mounting cassette 7. This means that the mounting cassette 7 fitted into the mounting arm is not damaged, and the substrate body 1 whose abrasive grain layer 2 has not been damaged can be mounted again with a new bolt 8.

<Effects of the Invention> As described above, the polishing grindstone substrate of the present invention has a protective resin layer formed in an arc shape on both sides of the abrasive grain layer formed in the center of the lower surface, so that the abrasive grain layer when contacted with a stone material or the like is formed. Can be prevented from being destroyed. Further, since the polishing whetstone mounting substrate of the present invention is constructed such that the substrate body provided with the abrasive grain layer and the mounting cassette fitted to the mounting arm are integrated by the synthetic resin bolt which is broken under a constant load, When a contact shock more than necessary is applied during the contact, the bolt is broken and the substrate body and the mounting cassette are separated, so that the mounting cassette can be prevented from being damaged. Further, since the mounting cassette is made of hard rubber, it absorbs vibrations during polishing work, withstands shocks, and is not damaged, so that the mounting cassette and the substrate body can be reused by changing only the bolts. Further, since the mounting cassette is made of hard rubber, if it is formed slightly larger, the mounting arm is firmly fitted to the dovetail groove convex portion and can be used for a long period of time.

[Brief description of drawings]

The drawing shows an embodiment of the present invention. FIG. 1 is a perspective view,
2 is a perspective view for separation, and FIG. 3 is a sectional view taken along the line AA of FIG. 1 ... Substrate body 2 ... Abrasive grain layer 3 ... Protective resin layer 4 ... Fitting groove portion 7 ... Mounting cassette 8 ... Synthetic resin bolt 10 ... Dovetail groove convex portion 11 ... Mounting arm 12 ... … Ant groove 13 …… Wedge shape

Claims (1)

[Scope of utility model registration request] 1. A rectangular substrate main body is provided with an abrasive grain layer formed by mixing and sintering abrasive grains and diamond fine powder at the center of the lower surface in the longitudinal direction, and protective resin layers are provided on both sides of the abrasive grain layer. A hard rubber mounting cassette with wedge-shaped protrusions on the upper surface and dovetail groove protrusions on both sides in the longitudinal direction of the wedge-shaped protrusions is fitted into the fitting grooves on the upper face of the polishing grindstone substrate formed in an arc shape. A polishing grindstone mounting substrate in which the polishing grindstone substrate and the mounting cassette are integrally fixed to each other with a synthetic resin bolt.