Lens holding device for lens centering machine

Abstract

To provide a lens holding device for a lens centering machine, which is structurally simple and which facilitates rotation drive control.SOLUTION: A lens holding device for a lens centering machine comprises a pair of first and second holders that are arranged in an opposed manner on the same axis for sandwiching a lens. A first support device for supporting the first holder and a second support device for supporting the second holder are provided. A drive shaft drive-controlled by one driving source is provided. The first and second support devices are synchronously and rotationally controlled by the drive shaft.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a centering machine for optical lenses, and particularly to a lens holding device for holding a lens during centering processing.

Background Art

[0002] When performing centering processing of an optical lens, for example, as disclosed in Patent Document 1, the lens is sandwiched and rotated by a pair of holders called a bell holder, a cup holder, etc., and centering is performed. Thereafter, circular grinding and outer shape cutting are performed by a rotary grinding wheel whose position is controlled in the cutting direction and a direction orthogonal thereto. Therefore, a pair of holders arranged to face each other on the same axis requires means for controlling the proximity and separation of each other and means for synchronous rotation control in order to mount and remove the lens.

[0003] Therefore, conventionally, since a drive motor was connected to each of the support devices that support a pair of holders, it was necessary to have two drive motors and to perform synchronous rotation control of these two drive motors, resulting in a complicated structure and difficult synchronous control.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] An object of the present invention is to provide a lens holding device for a lens centering machine that has a simple structure and is easy to control rotational drive.

Means for Solving the Problems

[0006] The lens holding device for a lens centering machine according to the present invention includes a pair of first holders and second holders arranged opposite each other on the same axis for sandwiching a lens, a first support device for supporting the first holder, and a second support device for supporting the second holder. It has a drive shaft that is drive-controlled by one drive source, and the first support device and the second support device are synchronously rotation-controlled by the drive shaft. Here, the first support device and the second support device each have a mechanism capable of rotation control and positioning and fixing control of the first holder and the second holder, respectively, and are drive-controlled by a drive source.

[0007] The present invention is characterized by a lens holding device that constitutes an optical lens centering processing apparatus, and a grinding wheel device can be combined with a known one.

[0008] The lens holding device has a pair of first holders and second holders arranged on the same axis for sandwiching a lens. When the first support device for supporting the first holder and the second support device for supporting the second holder sandwich the lens, the first and second support devices are controlled to move in a direction approaching each other, and when the lens is taken out, they are controlled to move in a direction away from each other and can be synchronously rotation-controlled in a state where the lens is sandwiched. It is characterized in that there is one drive source such as a motor for rotationally controlling the first support device and the second support device. Thereby, the synchronous control of the first support device and the second support device becomes easy.

[0009] Here, one of the first support device or the second support device may be directly drive-controlled by the drive shaft. Since a connecting shaft is required to rotationally drive the other support device, in the present invention, the drive shaft is connected to a connecting shaft for driving and transmitting to the first support device or / and the second support device.

[0010] In the present invention, as an example of the mode in which the first support device and the second support device are controlled to approach and separate from each other, the connecting shaft preferably has a first connecting shaft and a second connecting shaft, and the first connecting shaft and the second connecting shaft are connected to be telescopable with each other. Here, as an example of a structure that can expand and contract, an example is one having a sliding function in the expansion and contraction direction.

[0011] In the present invention, the drive shaft or the connecting shaft, the first support device, and the second support device may have a transmission structure in which drive is transmitted by a belt, or may be directly connected.

Advantages of the Invention

[0012] In the lens holding device according to the present invention, since one drive source such as a motor may be used, the overall structure is simple and synchronous control of a pair of support devices is easy.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Modes for Carrying Out the Invention

[0014] The lens holding device according to the present invention is for use in a core boring processing device for use in centering and external shape processing of an optical lens, and known grindstone devices can be combined.

[0015] Therefore, hereinafter, a configuration example of the lens holding device will be described below with reference to the drawings.

[0016] Fig. 1 shows a configuration example of Example 1. In the lens holding device 10, a first holder 11a and a second holder 11b for sandwiching the lens 1 are arranged to face each other. In the example shown in Fig. 1, the first holder 11a is arranged on the lower side and the second holder 11b is arranged on the upper side thereof on a vertical line, but they may be arranged horizontally. The first holder 11a is attached to the first support device 12a, and the second holder 11b is attached to the second support device 12b, and they are arranged on the same axis. An example is shown in which one motor is used as the drive unit 20 serving as the drive source. In this embodiment, a two-stage pulley 21 is connected to the drive shaft 20a of the motor, and an example is shown in which the first-stage pulley and the second driven shaft 13b of the second support device 12b are connected by a belt V1. In order to rotationally control the first support device 12a, an example is shown in which the upper end side of the connecting shaft 30 is connected to the second-stage pulley of the pulley 21 by a belt V3, and the lower end side of the connecting shaft 30 is connected to the first driven shaft 13a of the first support device 12a by a belt V2. In this embodiment, the second support device 12b and the drive unit 20 are integrally or interlocked and are controlled to move up and down. Following this up and down movement, the connecting shaft 30 is made to be telescopically extendable. In this embodiment, the connecting shaft 30 is divided into a first connecting shaft 31 and a second connecting shaft 32. A first flange portion 31a is provided on the lower end side of the first connecting shaft, and a plurality of connecting pins 31b are provided concentrically on the outer peripheral side of the first flange portion 31a with respect to the axis thereof. The second flange portion 32a is slidably connected in the vertical direction along a connecting hole 32b provided corresponding to the connecting pin 31b. Note that the first connecting shaft 31 and the second connecting shaft 32 may be connected to each other by a spline shaft connection. Thereby, with one drive unit, the upper and lower first support devices 12a (first holder) and second support devices 12b (second holder) can be rotationally controlled coaxially and synchronously.

[0017] Embodiment 2 is shown in FIG. 2. In this embodiment, by connecting the drive unit (motor) 20 to the first support device 12a (first driven shaft), an example is shown in which the second support device 12b and the first connecting shaft 31 are integrally or interlocked and controlled to move up and down with the drive unit fixed.

[0018] Embodiment 3 is shown in FIG. 3. This embodiment is an example in which a connecting shaft 31 is directly provided to the drive unit 20 via a coupling 22. In this embodiment, the drive unit 20 is coupled to the first connecting shaft 31 side of the connecting shaft 30 via a coupling, so that the first connecting shaft 31 and the second driven shaft 13b of the second support device 12b are connected by a belt V1, and the second connecting shaft 32 and the first driven shaft 13a of the first support device 12a are connected by a belt V2.

[0019] Example 4 is shown in FIG. 4. This embodiment is an example in which the drive unit 20 is connected to the second connecting shaft 32 via a coupling 22, and the rest is the same as in Example 3.

Explanation of Signs

[0020] 1 Lens 10 Lens holding device 11a First holder 11b Second holder 12a First support device 12b Second support device 13a First driven shaft 13b Second driven shaft 20 Drive unit 20a Drive shaft 21 Pulley 30 Connecting shaft 31 First connecting shaft 31a First flange portion 31b Connecting pin 32 Second connecting shaft 32a Second flange portion 32b Connecting hole

Claims

1. A pair of first and second holders arranged opposite to each other on the same axis for sandwiching a lens, a first support device for supporting the first holder, and a second support device for supporting the second holder, having a drive shaft driven and controlled by one drive source, wherein the first support device and the second support device are synchronously rotationally controlled by the drive shaft. A lens holding device for a lens centering machine.

2. The drive shaft is connected to a connecting shaft for driving and transmitting to the first support device or / and the second support device. The lens holding device for a lens centering machine according to Claim 1.

3. The connecting shaft has a first connecting shaft and a second connecting shaft, wherein the first connecting shaft and the second connecting shaft are connected to be telescopically extendable with respect to each other. The lens holding device for a lens centering machine according to Claim 2.

4. The drive shaft or the connecting shaft, and the first support device and the second support device are driven and transmitted by a belt. The lens holding device for a lens centering machine according to Claim 2 or 3.

Images