JPH0453661B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an eyeglass lens edge grinding device having a grinding wheel driven by a motor.

In known eyeglass lens edge grinding machines of this type, the grinding wheel and the support for the template are mounted stationary in a machine frame, the grinding wheel being driven by a motor arranged in this machine frame. It is then driven. A spectacle lens holding shaft for holding or rotating the spectacle lens and the template is provided in an upper part which is rotatable about a vertical axis, and the spectacle lens is attached to the grinding wheel using gravity, and the template is attached to a template-compatible support member. It is pivotably supported about a horizontal axis so as to be mounted on the. In addition to the spectacle lens pivoting horizontally about the vertical axis of the upper machine part, the part supporting the spectacle lens holding shaft pivots vertically about the horizontal axis of the machine upper part. Two mutually orthogonal or nearly orthogonal arcuate trajectory sections are obtained in which the spectacle lens moves.

SUMMARY OF THE INVENTION It is an object of the present invention to improve the known grinding device so that the adjustment or movement of the eyeglass lens relative to the grinding wheel is facilitated, and the movement trajectory of one of the grinding wheel and the eyeglass lens is changed between the grinding wheel and the eyeglass lens. It is possible to precisely set the movement trajectory of the other lens, i.e. to improve the pressing force of the eyeglass lens on the grinding wheel compared to previously specified, and also to control the movement of one of these components electronically or electrically. When controlled, the purpose is to be able to control this movement without any problems, and furthermore, to make the entire grinding device simple to construct.

According to the invention, the problem is solved in a spectacle lens edge grinding device of the type mentioned at the outset, in which the motor and the grinding wheel are movably adjusted in two mutually orthogonal directions in a horizontal plane with respect to a fixedly supported spectacle lens. solved by being possible.

In an advantageous embodiment of the spectacle lens edge grinding device according to the invention, the motor and the grinding wheel are arranged on a common carriage, which carriage can be moved towards and away from the spectacle lens by the motor or by the force of a spring. and is freely movable linearly in the direction of the grinding wheel axle.

In a particularly advantageous embodiment, which allows a free linear movement of the motor and the grinding wheel parallel to the grinding wheel axis, if the spectacle lens is placed in the groove of the grinding wheel for chamfering and grinding, The carriage is supported at three points on the plate. Such a three-point bearing consists of a horizontal guide rod placed on the plate near the grinding wheel and a ball or roller bearing near the motor, placed at the apex of the triangle of the three-point bearing. It is configured.

The advantages of the spectacle lens edge grinding device according to the invention are:
Due to the respective linear movements of the grinding wheels relative to the spectacle lenses, the spectacle lenses and the grinding wheels no longer perform arc-shaped movements, and this makes chamfering and grinding particularly easy and precise. It's about being able to do it. If the grinding process is electronically or electrically controlled,
It is particularly advantageous if the grinding wheel moves linearly with respect to the spectacle lens. Furthermore, when the carriage, motor, and grinding wheel move in a straight line, the movement is faster than when these components move in an arc.
The motor or spring force acting on the carriage can be precisely controlled to adjust the carriage's movement.

The three-point support of the carriage on a movable plate allows the triangular support of the three-point support to A ball or roller bearing at the apex has the advantage that there is no forced guidance for the carriage. This type of guidance has advantages over the known type of guidance which takes place along two parallel guide bars, in which the carriage can be moved very easily in the longitudinal direction of the two guide bars. In order to be able to move it, the guide rod must be supported very precisely.

The invention will now be explained with reference to the illustrated embodiment.

A grinding wheel 2 for grinding the edge of a spectacle lens 1 is driven by a motor 4 via a belt transmission 3 . The spectacle lens 1 is held between the two halves 5a and 5b of the shaft 5 by rubber cushions 55a and 55b, and in this case, a template (not shown) is placed on one of the halves. There is. The shaft 5 is fixedly mounted in the machine frame and is rotated by a motor via one of the two half-shafts in a known manner. A grinding wheel axle 6, which is driven by a motor 4 via a belt transmission 3, extends parallel to the axis 5 of the spectacle lens and template. shaft 7 of motor 4
is also arranged parallel to axis 5.

The grinding wheel 2 , consisting of a grinding wheel section 8 for circumferential grinding and a grinding wheel section 9 with a chamfered groove 10 , as well as the motor 4 are mounted on a carriage 11 . For this purpose, the carriage 11 has two L-shaped supports 12 between the vertical legs 13 of which the grinding wheel axle 6 extends. The ends of the grinding wheel axle 6 are held in the bearing holes 14, 15, and the grinding wheel 2 is non-rotatably arranged on the grinding wheel shaft 6 approximately at the center of the axis. The horizontal legs 16, 17 of each support 12, which engage under the carriage 11, are connected to the carriage 11 and are each provided with a hole 18 through which a guide rod 19 can be inserted. The end of is protruding. The guide rod 19 is held in a block 20 which is shorter than the distance between the legs 16, 17. In this case, either the L-shaped supports 12 are freely movable along the guide rod ends, or the guide rod ends are connected to the supports and the block 20 is freely movable between the supports. be.

The block 20 rests parallel to the grinding wheel axle 6 on a plate 21, which supports a guide block 24, 25 near its edges 22, 23, respectively. The guide blocks 24, 25 are arranged at right angles to the grinding wheel axle 6 and extend longitudinally through the guide blocks 24, 25 in each case a further guide rod 26, 27, which guide rods 26, The end of 27 is held in a support block 28 which is stationary in the machine frame.

The plate 21 is close to the edge 29 and the guide rod 19
A bearing pin 31 arranged at right angles to the longitudinal axis of
A pin holder 30 is held. A roller 32 is supported on the support pin 31 via a ball bearing or a roller bearing, and the lower surface of the carriage 11 is supported on this roller. It is therefore clear from FIG. 2 that the carriage 11 is guided at the end of the guide rod 19 and rests thereon, whereas the carriage 11 is guided at the end of the guide rod 19 and rests on the guide rod at this end, whereas The platform portion is supported by rollers 32. As a result, the three-point support shown by the two dashed lines 34, 35 and the guide rod 19 is realized. Therefore, it is important that the position and condition of the guide rod 19 be accurate in order to guide the carriage 11 on the plate 21. The barrel-shaped roller 32 advantageously does not form a guide for the carriage 11, but rather forms a rolling support.

In order to move the grinding wheel 2 toward and away from the spectacle lens 1, and in this case for chamfering and grinding, the free movement of the carriage 11 in the direction of the arrow K in FIG. 2 is not hindered. In order to do this, an adjusting member for moving the carriage 11 in the direction of the arrow S acts on the plate 21. For this purpose, a tensioning device 36 in the form of a belt, chain or the like is used, which is opposed by a spring 37 at the other end of the plate 21, which spring 37 is fixed in the machine frame in an area 38. attached. When the plate 21 is moved in the direction of the arrow S, the guide rod 19 is carried along, and the carriage 11 is guided along this guide rod 19 when chamfering and grinding are to be carried out.
When performing peripheral surface grinding with grinding wheel section 8, reciprocating table 11
to the guide rod 19 or the guide rod 19 to the legs 16, 17.
Fixed.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a partial side view of a spectacle lens edge grinding device according to the present invention, and FIG. 2 shows a grinding wheel, a carriage supporting a motor, and a spectacle lens. 1 is a partial plan view of an ophthalmic lens edge grinding device according to the present invention shown; FIG. 1... Eyeglass lens, 2... Grinding wheel, 3... Belt transmission device, 4... Motor, 5, 7... Shaft, 5
a, 5b... Half shaft, 6... Grinding wheel axle, 8, 9...
Grinding wheel division, 10... Chamfer groove, 11... Carriage table, 12... Support body, 13, 16, 17... Leg portion, 14, 15... Support hole, 18... Hole, 19,
26, 27... Guide rod, 20... Block, 21
... Plate, 22, 23, 29 ... Edge, 2
4, 25...Guide block, 28...Support block, 30...Pin holder, 31...Support pin, 3
2...roller, 36...tension device, 37...spring, 38...range.

Claims (1)

[Scope of Claims] 1. A spectacle lens edge grinding device having a grinding wheel driven by a motor, wherein the motor and the grinding wheel are perpendicular to each other in a horizontal plane with respect to a fixedly supported spectacle lens. In the two-direction movable type, a carriage 11 supporting the motor 4 and the grinding wheel 2 is horizontally driven so as to be movable towards the spectacle lens 1 and movable away from the spectacle lens 1. A three-point support is provided on the plate 21, and this three-point support connects a horizontal guide rod 19 placed on the plate 21 near the grinding wheel 2, and a motor placed at the triangular apex of the three-point support. a ball or roller bearing 30 provided near 4;
31 and 32. An eyeglass lens edge grinding device. 2. The motor 4 and the grinding wheel 2 are arranged on a common carriage 11, and the carriage 11 is movable and adjustable by the motor or a spring force so as to be able to move towards and away from the spectacle lens 1, and the grinding wheel 2 is arranged on a common carriage 11. 2. A spectacle lens edge grinding device according to claim 1, which is freely movable linearly in the direction of the axle.