JPH0540924Y2 - - Google Patents

Description

[Detailed explanation of the idea] Purpose of invention (Industrial application field) The present invention relates to a template fixture for a beading machine.

(Conventional technology) In a beading machine that grinds eyeglass lenses,
A lens to be processed is held on the lens rotation shaft of the carriage, and a template is attached to one end of this lens rotation shaft. This template is a mold of the shape of the lens that will be inserted into the lens frame of the eyeglass frame, and the beading machine processes the lens by following this template.

Generally, the above-mentioned template is shaped so that the geometric center of the lens frame of the eyeglass frame coincides with the center of the template. On the other hand, it is rather rare that a spectacle lens is fitted into a lens frame so that its optical center coincides with the geometric center of the lens frame, and in most cases it is fitted so that both centers are eccentric.

For this reason, conventionally, in order to attach a lens to the lens rotation axis, the geometric center of a suction cup that attracts the lens is eccentrically offset from the optical center of the lens by the above-mentioned eccentricity amount, and the lens is attached to the lens rotation axis.

(Problem that the invention aims to solve) However, since the refractive surface of the lens is usually a spherical surface, the work of suctioning the lens to the suction cup with the geometric center of the suction cup decentered from the optical center of the lens is difficult. In this case, errors often occur in this suction operation, which in turn leads to errors in lens processing.

The present invention was devised in view of the above-mentioned drawbacks of the conventional technology, and an object of the present invention is to provide a template mount for a polishing machine that allows the template to be mounted eccentrically with respect to the rotational axis of the lens rotation axis of the polishing machine. That is.

(Means for Solving the Problem) In order to achieve this object, this invention includes a shaft and a template holding member attached to the shaft, the shaft and one end of the template holding member. A groove in a direction perpendicular to the axis of the shaft body is formed in one of the two, a protrusion that is slidably inserted into the groove is formed in the other, and the other end of the template holding member is formed with a protrusion that is slidably inserted into the groove. is provided with a template engaging means with which the template engages, and presses the groove and the protruding body on either the shaft body or the template holding member to prevent relative movement between the two. The present invention is characterized in that it is a mold plate mount for a milling machine, which is provided with a blocking means for preventing this.

(Function) With the above structure, the template holding member can be moved relative to the shaft in a direction perpendicular to the axis of the shaft by operating the blocking means. If the template holding member is moved in a direction perpendicular to the axis of the shaft in this state, the center of the template will be eccentric.

(Example) Hereinafter, an example of this invention will be described based on the drawings.

First Embodiment FIGS. 1 and 2 show a first embodiment of the template mount according to the present invention.

In FIG. 1, LR is a lens rotation axis of a polishing machine (not shown), and a lens to be processed is held on this lens rotation axis LR. A holder attachment hole H is formed at one end e of the lens rotation axis LR, and a slot S that opens at the end is formed.

Further, in FIGS. 1 and 2, A is a template mount that is attached to one end e of the lens rotation axis LR. This template fixture A is the mounting shaft 1 (shaft body)
and a pin 2 protruding from the outer peripheral surface of one end of the mounting shaft 1.
It is equipped with As a result, this mounting shaft 1 is inserted into the holder mounting hole H of the lens rotation shaft LR, and
By inserting the pin 2 into the slot S, the attachment shaft 1 can be attached to one end e of the lens rotation axis LR so as to be non-rotatable. This configuration of the mounting shaft 1 allows the template mount A of this embodiment to be compatible with a normal template mount that does not have a template eccentric mechanism.

The other end of the mounting shaft 1 is formed with a dovetail groove 3 that opens to the other end surface 1a and extends in a direction perpendicular to the axis of the mounting shaft 1, and a male thread 7 is formed on the outer periphery of the intermediate portion of the mounting shaft 1. It is formed. A nut 8 of a template mount A is screwed onto this male screw 7 so as to be movable forward and backward in the axial direction of the mounting shaft 1.

Furthermore, the template fixture A has a template holding member 6 that extends vertically and narrowly in FIG. A dovetail 4 extending in the longitudinal direction of the template holding member 6 is formed on one surface (one end side) of the template holding member 6, and a large diameter boss is formed in the center of the other surface (other end side) of the template holding member 6. 5a is provided in a protruding manner, and small-diameter bosses 5b and 5c are provided in the vicinity of both ends of the other surface of the template holding member 6 in a protruding manner. this boss 5
a, 5b, and 5c constitute template engaging means,
Further, the dovetail 4 of this template holding member 6 is slidably fitted into the dovetail groove 3.

Moreover, an index 9 is formed on the outer periphery of the distal end of the mounting shaft 1, and on the other hand, an index 9 is formed on the outer surface extending in the longitudinal direction of the template holding member 6.
A scale 10 is formed to indicate the amount of eccentricity with respect to.

Next, the operation of the template mount for the ball-sliding machine having such a configuration will be explained.

When the nut 8 is loosened in the above-described configuration, the dovetail 4 of the template holding member 6 becomes able to slide within the dovetail groove 3 in a direction perpendicular to the plane of the paper in FIG. In this state, by slidingly displacing the template holding member 6 in the direction perpendicular to the plane of the paper in FIG.
It is displaced vertically in the figure and is eccentric in the direction perpendicular to the axis of the mounting shaft 1. When the nut 8 is rotated and moved toward the other end of the mounting shaft 1, the front surface 8a of the nut 8 comes into contact with the outer surface 4a of the dovetail 4. When the nut 8 is further tightened, the slopes 4b, 4b of the dovetail 4
are pressed against the inner surfaces 3a, 3a of the dovetail groove 3, and the dovetail 4
is held between the nut 8 and the dovetail grooves 3a, 3a, and the dovetail 4 is prevented from sliding.

Second Embodiment Dovetail 4 formed by the nut 8 and dovetail groove 3 of the first embodiment
In order to further increase the sliding prevention force, as shown in FIG. As shown in the figure, the tooth portions 12, 12 that mesh with the tooth portion 11 may be formed. As a result, when the nut 8 is brought into contact with the outer surface 4a of the dovetail 4, the teeth 11 of the nut 8 mesh with the teeth 12, 12 of the dovetail 4, and the dovetail 4 is prevented from moving within the dovetail groove 3. Definitely blocked.

Third Embodiment In the first embodiment, the template holding member 6 can be decentered in only one direction, but this makes it possible to accommodate so-called "inward shifting" and "outward shifting" of the lens.
Furthermore, in order to enable so-called "upward shifting" and "downward shifting", as shown in FIG.
The template holding member 6 may be attached to the plate holding member 6 by configuring the plate so as to be perpendicular to the first eccentric direction.

That is, in this embodiment, a male screw 7' is provided at the center of the other surface of the main body 6a in place of the boss 5a in the first embodiment.
A nut 8' is screwed onto the male thread 7', and a dovetail groove 3 is provided at the free end of the male thread 7' and is open on the end face and perpendicular to the axis of the dovetail 4 and the male thread 7'. ', and a dovetail 4' of a template mounting member 6' having the same structure as the template mounting member 6 described above is slidably fitted into the dovetail groove 3'.

According to this embodiment, in FIG. 5, the dovetail 4 can be adjusted to move up and down, and the dovetail 4' can be adjusted to move in a direction perpendicular to the plane of the paper.

(Effect of the invention) As explained above, according to the invention, the template holding member is provided on the shaft attached to the lens rotation shaft so that it can be moved and adjusted in a direction perpendicular to the axis of the shaft. It can be mounted eccentrically with respect to the rotation axis, and as a result, when a conventional suction cup is attached to a lens, it is only necessary to attach its center to the optical center of the lens, without causing adsorption errors due to eccentric adsorption. , lens machining errors are also eliminated.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a first embodiment of the template fixture according to the present invention, FIG. 2 is a cross-sectional view taken from the side of FIG. 1, and FIG. 3 is a plan view showing a second embodiment of the present invention. FIG. 4 is a side view of the ant, FIG. 4 is a front view showing the second embodiment, and FIG. 5 is a plan view showing the third embodiment of the present invention. 1...Mounting shaft (shaft body), 3...Dovetail groove (groove), 4...
...Dovetail (projection), 5a, 5b, 5c... Boss (engaging means), 6... Template holding member, {7... Male screw,
8...Natsuto} (preventing means).

Claims (1)

[Claims for Utility Model Registration] (1) A shaft body and a template holding member attached to the shaft body are provided, and one end of the shaft body and the template holding member is provided with a portion of the shaft body. A groove is formed in a direction perpendicular to the axis, a protrusion is formed on the other end to be slidably inserted into the groove, and a template engaging member with which a template engages is formed at the other end of the template holding member. A coupling means is provided, and a blocking means is provided on either the shaft body or the template holding member for bringing the groove and the protruding body into pressure contact to prevent relative movement between the two. A template mount for a beading machine featuring the following. (2) The template mount for a drilling machine according to claim 1, wherein the blocking means is a nut that is screwed into a male thread formed on the shaft. (3) The template mount for a drilling machine according to claim 1 or 2, wherein the groove and the protrusion have a dovetail structure. (4) Utility model registration claims 1 to 3, characterized in that the shaft body and the template holding member are each provided with one of a scale and an index indicating the amount of relative movement between the two. A mold plate mount for the beading machine described in any one of the paragraphs. (5) The abrasive machine according to any one of claims 1 to 4, wherein the shaft body is configured to be detachably attached to a lens rotating shaft of the abrasive machine. template mount. (6) Concentric teeth are formed on the front surface of the nut on the dovetail side, and teeth that mesh with the teeth are formed on the outer surface of the dovetail provided on the template holding member on the nut side. A template mount for a beading machine according to claim 3 of the utility model registration claim, characterized in that: