JPH10138111A - Lens grinding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens grinding machine that can improve workability and productivity by providing one lens grinding machine with the grinding function of two machines so as to be able to form a compact, inexpensive device and to perform at least two kinds of machining work in narrow space. SOLUTION: A lens grinding machine is composed of a pair of grinding devices 1a, 1b installed in parallel on one bed 5. Each grinding device consists of a workpiece shaft 2 that can be rotated and elevated while supporting a workpiece (lens) W in a detachable state, a circular table 3 turnable in relation to the workpiece shaft 2, and a wheel shaft 4 rotatable as well as movable onto the circular table 3. The workpiece shafts 2 of a pair of grinding devices 1a, 1b are installed in parallel on one bed 5. The workpiece W is fitted in the detachable state to the tip side of each workpiece shaft 2 through a workpiece holder 6. An elevating device 7 such as an air cylinder built in the bed 5, and a workpiece shaft rotatory-driving device 8 are provided on the rear end side of the workpiece shaft 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens grinding machine for grinding an optical lens or the like, and more particularly to a lens grinding machine having one grinding machine and two grinding functions. is there.

[0002]

2. Description of the Related Art Conventionally, a lens grinder for grinding an optical lens or the like often has different curvatures and processing methods between a front surface and a rear surface of a lens (work). For example, a front surface is formed by processing a convex surface having a constant curvature. On the other hand, since the concave surface processing with a constant curvature is performed on the rear surface side, when performing the surface processing and the rear surface processing, it is absolutely necessary to perform the operation using two lens grinders.

[0003] That is, a lens has two surfaces, a front surface and a back surface, and requires at least two times of processing even if the grinding is the same process in processing for having different spherical surfaces from the viewpoint of optical performance. Becomes It is possible to process the front and back of the lens with a single machine by changing the setup, but in general, considering the productivity, it is performed in a flow operation, so it is necessary to process each lens with different lens grinders I have.

[0004]

However, the use of two lens grinders requires space for installing two lens grinders, and the two lens grinders are disposed adjacent to each other. When installing, or when installing at a fixed distance, after processing one surface (surface) of the lens with the first lens grinder, remove the lens and grind the second lens It is necessary to carry the work to the board, turn over the lens, mount the lens, and process the other surface (back surface).

[0005] For this reason, there is a problem that it takes much labor and time to mount and remove the lens and transport the lens, and that installing two lens grinders having the same function requires a large space and cost. . The present invention has been devised in view of such a conventional problem, and a single lens grinder is provided with a grinding function for two units, whereby a compact and inexpensive apparatus can be realized. In addition, since at least two types of machining operations can be performed simultaneously in a narrow space, workability and productivity can be improved, power consumption and the like can be significantly reduced, and economic efficiency is improved. It is an object to provide a lens grinder.

According to the present invention, to achieve the above object, a rotatable and vertically movable work shaft for detachably supporting a work, a circular table rotatable with respect to the work shaft, and a movable table on the circular table are provided. And a pair of grinding devices consisting of a rotatable wheel shaft,
The gist of the present invention is that a pair of circular tables placed on one bed are arranged side by side, and a pair of circular tables placed on the bed are placed symmetrically.

The gist of the present invention is that a pair of grinding devices installed in parallel on one bed can be controlled simultaneously or individually by one controller. The present invention is configured as described above, and a single lens grinder is provided with a grinding function for two units, so that when performing front and back processing of a conventional lens, at least two lens grinders Was used with a single lens grinder, and processing could be performed in one installation space. Therefore, workability and productivity in mounting and removing lenses, transporting lenses, etc. Can be remarkably improved, can be manufactured at low cost, and the power consumption and the like can be greatly reduced, which is economically advantageous.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic front view of a lens grinder embodying the present invention, and FIG. 2 is a vertical sectional side view taken along the line AA of FIG. 1. The lens grinder removably supports a work (lens) W. A pair of grinding devices including a rotating and vertically movable work shaft 2, a circular table 3 rotatable with respect to the work shaft 2, and a wheel shaft 4 movable on the circular table 3 and rotatable. 1a and 1b are arranged on one bed 5 in parallel.

That is, the work shafts 2 of the pair of grinding devices 1a and 1b are installed in parallel with one bed 5, and a work W is attached to and detached from the front end of the work shaft 2 via the work holder 6. At the rear end side of the work shaft 2, a lifting device 7 such as an air cylinder and a work shaft rotation drive device 8 incorporated in the bed 5 are provided.

The work shaft 2 is rotatably supported in a piston rod 9 of a lifting / lowering device 7 via a bearing member 10. A pulley 11 a, a drive motor 12 and a drive motor 12 Pulley 1 provided on the drive shaft 13
1b and a drive shaft rotation driving device 8 comprising a pulley 11a and a driving belt 14 wound around the pulley 11b.
Is provided.

Reference numeral 15 denotes a stopper for the work shaft 2 attached to the lower portion of the lifting / lowering device 7, which comes into contact with the fine feed control actuator 17 attached to the support plate 16 of the work shaft rotation drive device 8, and The feed speed of the shaft 2 is controlled, and reference numeral 18 denotes a stopper for adjusting the forward end of the work shaft 2, which is configured to perform adjustment in the axial direction.

That is, the work shaft 2 is rotationally driven through the work shaft rotation driving device 8 comprising the pulley 11b and the driving belt 14 wound around the pulley 11a and the pulley 11b. Lifting device 7 such as an air cylinder, and fine feed control actuator 17
First, it rises quickly through the first and second portions, and the fine feed is performed when the fine feed control actuator 17 comes into contact with the stopper 15.

A circular table 3 which can be turned with respect to the work shaft 2 has a column 1
9, a pair of left and right fan-shaped tables 3a is pivotally mounted via a center shaft 20 symmetrically disposed,
It is configured so that it can be fixed at an arbitrary angle via fixing means (not shown). Therefore, by disposing the pair of right and left circular tables 3 on one bed 5 at symmetrical positions, the distance between the shafts is shortened, and the entire apparatus can be made compact.

The wheel shaft 4 which is movable on the circular table 3 and is rotatable is provided with a dovetail groove 21 formed on the circular table 3 in a wheel head 2.
2 is movably engaged, and a wheel shaft 4 for attaching a tool 23 to the tip of the wheel head 22 is rotatably supported. A pulley 24 is attached to the rear end of the wheel axle 4.
A belt 28 is wrapped around a pulley 27 of a drive shaft 26 of a drive motor 25 mounted thereon to transmit a rotational driving force.

The pair of grinding devices 1a and 1b installed in parallel on one bed 5 can be controlled simultaneously or individually by a single controller (not shown). . As described above, the work axis 2, the circular table 3, and the wheel axis 4 are placed on one bed 5.
A pair of grinding devices 1a and 1b are installed in parallel,
In one grinding device 1a, one surface (front surface) of the work W
(For example, convex surface processing) exclusively, and the other grinding device 1b exclusively performs processing (for example, concave surface processing) for the lower surface (rear surface) of the work W, so that one lens grinder is used. In addition, two types of operations can be performed consecutively in one installation space, so that workability and productivity can be remarkably improved in mounting and removing a lens, transporting a lens, and the like, and at a low cost. Can be manufactured
Power consumption can be significantly reduced, which is economically advantageous.

Incidentally, one conventional lens grinder has a width of
In contrast to 1,420 mm, depth 730 mm and height 1,440 mm, according to the present invention, a single lens grinder equipped with two grinding devices 1a and 1b has a width of 650 mm, a depth of 705 mm and a height of 705 mm. With a height of 1,650 mm, the weight and floor area of a conventional single-shaft grinding machine can be reduced by about 70%, and productivity and workability can be significantly improved in a limited space.

[0017]

As described above, the present invention provides a rotatable and vertically movable work axis for detachably supporting a work, a circular table pivotable with respect to the work axis, and a movable table movable on the circular table. Since a pair of grinding devices including a rotatable wheel shaft are installed in parallel on one bed, the following excellent effects can be obtained. . By providing two lens grinding functions with one lens grinder, a compact and inexpensive apparatus can be obtained. . Since at least two types of machining operations can be performed in a narrow space, the workability and productivity of the work of attaching and detaching the work and the work of transporting the work can be improved. . The power consumption and the like can be greatly reduced, and an economically excellent lens grinder can be provided. . The two grinding devices can be controlled independently and simultaneously by the control device, so that the same processing and different processing operations can be performed efficiently. Also, since the moving distance of the work is short, the operation and sitting of the operator can be performed. It is possible to work as it is. . Since the weight can be significantly reduced as compared with two conventional lens grinders, it can be installed on the floor, making it an optimal machine for recent improved equipment. . By arranging a pair of left and right circular tables on a single bed at symmetrical positions, the distance between the shafts is shortened, and the apparatus as a whole can be made compact.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a lens grinding machine embodying the present invention.

FIG. 2 is a vertical sectional side view taken along the line AA of FIG. 1;

[Explanation of symbols]

1a, 1b Grinding device 2 Work shaft 3 Circular table 4 Wheel shaft 5 Bed 6 Work holder 7 Lifting device 8 Work shaft rotation drive device 9 Piston rod 10 Bearing member 11a, 11b Pulley 12 Drive motor 13 Drive shaft 14 Drive belt 15 Stopper 16 Support Plate 17 Control Actuator 18 Advance End Adjustment Stopper 19 Column 20 Center Shaft 21 Dovetail Groove 22 Wheel Head 23 Tool 24 Pulley 25 Drive Motor 26 Drive Shaft 27 Pulley 28 Belt W Work

Claims (3)

[Claims] 1. A rotatable and vertically movable work shaft for detachably supporting a work, a circular table rotatable with respect to the work shaft, a wheel shaft movable on the circular table and rotatable. Characterized in that a pair of grinding devices consisting of: are arranged in parallel on a single bed. 2. The lens grinding machine according to claim 1, wherein the pair of grinding devices installed in parallel on the one bed can be controlled simultaneously or individually by one controller. 3. The lens grinding machine according to claim 1, wherein the pair of circular tables installed on the bed are symmetrically installed.