JPH074746B2 - Double thread chamfering machine for glass material - Google Patents

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double bevel chamfering apparatus suitable for processing a glass plate, particularly a glass material having a small thickness.

[Prior art]

2. Description of the Related Art A conventional double beveling machine for glass material is, for example, one shown in FIGS. Reference numeral 1 is a pair of sander belts, the surface of which is a ground surface 2 that has been ground with a binder.
It is wound around the three rotating rollers 4 to 6 in an opposed state. Among the rotation rollers 4 to 6, the rotation roller 4 is for power, the rotation roller 5 is for tension adjustment, and the rotation roller 6 is
Is for grinding adjustment. The uppermost rotary roller 6 for grinding adjustment can be approached and separated by an adjustment handle (not shown), and the rotary roller 6 is adjusted according to the thickness size of the glass plate 7 as a "glass material" to be processed. Distance L
Is adjusted. Then, the glass plate 7 to be processed is mounted on the guide rail 8 and guided between the grinding surfaces 2 of the sander belt 1 facing each other at the portion wound around the rotating roller 6, and the grinding of the rotating sander belt 1 facing the grinding is performed. Both yarn surfaces at the lower end of the glass plate 7 are ground between the surfaces 2. In addition, S is a shower nozzle, which sprays water to prevent the scattering of grinding powder. Further, 10 is a transparent protective cover, and 11 is a power switch.

[Problems to be Solved by the Invention]

However, in such a conventional technique, both threads of the lower end of the glass plate 7 are chamfered between the grinding surfaces 2 of the sander belt 1 facing each other at the portion wound around the rotary roller 6. Therefore, by adjusting the distance L between the rotating rollers 6, it is possible to chamfer the yarns of the glass plates 7 of various thicknesses at an optimum 45 °, but to bring the rotating sander belt 1 closer. However, there is a limit naturally, and when processing a glass plate 7 having a too small thickness size, the thread surface X is in a so-called "standing" state as compared with a glass plate 7a having a normal thickness size. That is, the angle of the yarn surface became 45 ° or more, and the optimum angle of 45 ° (α) could not be obtained (see FIG. 7). In particular, there is a glass material that has been surface-treated as a glass material that is incorporated into an optical system used in recent office equipment, and such a glass material requires a strict processing system, and even if it is a thin glass material. However, accurate yarn surface processing is required over the entire length thereof, but the conventional device as described above cannot sufficiently satisfy such a demand. The present invention was made in view of such a conventional technique, and an object thereof is to provide an apparatus capable of chamfering both yarns at an optimum angle (45 °) even for a glass material having a small thickness. Is.

[Means for Solving the Problems]

The structure of the present invention will be described based on FIG. 1 of the embodiment.
That is, according to the double thread chamfering device for a glass material according to the present invention, a plurality of wheel-shaped grinding bodies 20 each having the peripheral surface 21 as a grinding surface can be rotated toward and away from each other and can move toward and away from each other. The two rotating shafts 22 are attached to each other in a state of being meshed with each other in an alternating manner, and the meshing portion K of the grinding body 20 is supported with the lower end of the glass material 7 from below and the glass material 7 Is placed at an intermediate position of the guide means 9 for feeding in a direction orthogonal to the wheel-shaped grinding body 20, and the glass fed to the grinding means 20 by the peripheral surfaces 21 of both grinding facing 20 facing each other. Both yarn surfaces at the lower end of the material 7 are ground.

[Action]

Since the grinding bodies for picking up the thread surface of the glass material are intermeshed with each other and can move toward and away from each other, even if the glass material is small in thickness, both threads of the glass material It is possible to perform grinding by applying the peripheral surface of the grinding body to the surface at an approximately optimum angle (45 °). Also,
Since the grinding bodies are rotated inward with respect to each other, the glass material is in a state of being pressed against the guide means by the grinding bodies, and the operation is easy and the grinding processing of both yarn surfaces can be performed accurately.

【Example】

A preferred embodiment of the present invention will be described below with reference to FIGS. The same parts as those of the prior art are designated by the same reference numerals, and the duplicate description will be omitted. Reference numeral 20 denotes a wheel-shaped grinding body, in which diamond grains are applied to the peripheral surface 21 as abrasive grains, and five pieces are attached to each of two rotating shafts 22 in a parallel state at predetermined intervals.
These grinding bodies 20 are attached in such a manner that they are alternately meshed with each other in the longitudinal direction of the rotary shaft 22, and can be approached and violated by an adjusting handle (not shown). Further, a sander belt 23 also serving as a drive belt is wound around the rotary shaft 22, and the rotary shaft 22 is rotated together with the grinding body 20 toward the inner side M. Reference numeral 9 denotes a guide means, which has a structure in which a step roll group 9a made of fat is arranged on a base plate 9b, and the lower end of a glass plate 7 as a "glass material" is supported from below. 7 can be fed in a straight line in a direction orthogonal to the wheel-shaped grinding body 20 (that is, a direction along the rotary shaft 22). The meshing portion K of the grinding body 20 is positioned at an intermediate position of the guide means 9. Therefore, using this guide means 9, the glass plate 7
By feeding the edge edge of the peripheral surface 21 of both grinding bodies 20 facing each other at the meshing portion K (end edge on the feeding side)
At, the two yarn surfaces on the lower side of the glass plate 7 sent there can be ground at the optimum angle (45 ° C.). That is, according to this embodiment, since the respective grinding bodies 20 that take the thread surface of the glass plate 7 can be moved toward and away from each other in a state where the grinding bodies 20 are meshed with each other alternately, the grinding bodies 20 are separated from each other. The distance 1 can be made sufficiently smaller than that of a conventional cider belt or the like, and even the glass plate 7 having a small thickness can be chamfered at both ends at the substantially optimum angle (45 °). Moreover, since the grinding bodies 20 are rotating toward the inside M, the glass plate 7 is pressed against the guide means 9 by the grinding bodies 20, and the operation is easy and the accurate grinding process can be performed. That is, an inward grinding force (rotational force) is applied from the grinding body 20 rotating toward the inner side M to both thread surfaces at the lower end of the glass plate 7, and this grinding force (rotational force) is Two kinds of forces act on the plate 7, that is, a force for pressing the glass plate 7 against the lower guide means 9 and a force for sandwiching the glass plate 7 from both left and right sides. The glass plate 7 sent to the meshing portion K of the grinding body 20 by the guide means 9 by these two kinds of forces,
It is automatically pressed against the guide means 9 and is positioned at the center (the meshing portion K) of the left and right grinding bodies 20 (because the grinding bodies 20 have the same number on the left and right and the pressing force from the left and right is equal). Therefore, it is not necessary for the operator to press the glass plate 7 against the guide means 9 and carefully align the glass plate 7 with the meshing portion K of the grinding body 20. Further, even though the grinding bodies 20 are rotating toward the inside M, the grinding bodies 20 are in mesh with each other. The lower end of 7 only hits the meshing portion K, and even if the position of the guide means 9 is too low,
The glass plate 7 will not be further caught between the two grinding bodies 20 and damaged. Further, since the five grinding bodies 20 are meshed with each other alternately, a gap corresponding to the width of each grinding body 20 on the other side is formed between the grinding bodies 20 on one side. Therefore, the presence of this gap enhances the heat dissipation performance of the grinding body 20, and accelerates the discharge of the grinding powder from this gap. In addition, as described above, the five grinding bodies 20 are arranged with a certain gap therebetween, and the glass plate 7 is fed to the grinding bodies 20 in a direction orthogonal to the grinding body 20, so that the glass plates 7
The edges (the corners on the feed side) of the peripheral surface 21 of the five grinding bodies 20 come into contact with both thread surfaces of the above. That is, both yarn surfaces (corners) of the glass plate 7 are ground one after another by the five “edges” that are continuous through the gaps, so that the grinding ability is very high. Therefore, even if the glass plate 7 is fed at a high speed, reliable and sufficient chamfering can be performed.
Many glass plates 7 can be processed in a short time. The housing 24 is provided with a working opening 26 for removing the corner 25 of the glass plate 7. The corner 25 of the glass plate 7 is inserted from here (see the phantom line in FIG. 2) and rotated inside. The corner 25 can be ground by pressing it against the ground surface 27 of the sander belt 23.

【effect】

The double thread chamfering device for a glass material according to the present invention has the contents as described above, and thus even a glass material having a small thickness size can perform double thread chamfering at an optimum angle. Further, according to the embodiment of the present invention, since the sander belt is used as the drive belt and the working opening for chamfering the glass material is provided in the housing, the chamfering of the glass material can be performed together with the chamfering of both threads. Have a positive effect.

[Brief description of drawings]

FIG. 1 is a perspective view showing a double thread chamfering device for glass material according to an embodiment of the present invention, and FIG. 2 is a schematic side view showing the grinding body shown in FIG. 1 and its peripheral portion. FIG. 4 is an explanatory view showing the relationship between the grinding body and the glass plate, FIG. 4 is a schematic side view corresponding to FIG. 2 of the prior art, and FIG. 5 is a plan view seen from the direction of the arrow V in FIG. FIG. 6 is an explanatory diagram corresponding to FIG. 3 according to a conventional example of the present invention,
And FIG. 7 is a side view showing a state in which both yarn surfaces of the glass plate are ground. 7 …… Glass plate (glass material) 9 …… Guide means 20 …… Wheel-shaped grinding body 21 …… Surface 22 …… Rotary shaft

Claims (1)

[Claims] 1. A plurality of identical wheel-shaped grinding bodies 20 each having a peripheral surface 21 as a grinding surface are attached to two rotating shafts 22 that can approach and separate from each other and that rotate inwardly toward each other M. It is mounted in a state of being meshed with each other in an alternating manner, and the meshing portion K of the grinding body 20 is supported in a state where the lower end of the glass material 7 is supported from below and the glass material 7 is orthogonal to the wheel-shaped grinding body 20. Guide means 9 for feeding in the direction
A glass characterized by grinding the both thread surfaces at the lower end of the glass material 7 sent thereto by the peripheral surfaces 21 of both grinding bodies 20 opposed to each other at the meshing portion K at the middle position of Both thread surface processing equipment of material.