JPH0616893Y2 - Positioning device for transfer arm in glass forming machine - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a transfer arm in a glass forming apparatus configured so that an optical glass material can be placed and supported to be carried in and out of a heating furnace and a molding chamber. Position adjusting device.

[Conventional technology]

As a position adjusting device of this type in a conventional glass forming device, there is a position adjusting device disclosed in Japanese Patent Laid-Open No. 62-182122.

That is, as shown in FIG. 5, engaging abutting portions 75, 76, 80 for engaging and abutting each other in the vicinity of the optical glass material placing portion 70 and the molding chamber 79 in the transfer arm portion 90 are provided, and the transfer arm portion is provided. Optical glass material 7 placed and supported on 71
When the central axis of 2 coincides with the axial center of the upper and lower molding dies 73, 74, the engaging abutting portions 75, 76, 80 of the aforesaid engaging abutting portions 75, 76, 80 are in abutting contact with each other. And the upper and lower molds 73 and 74 are aligned with each other.

[Problems to be solved by the device]

However, the conventional position adjusting device for the transfer arm has the following problems. That is, as shown in FIG. 5, when the central axis of the optical glass material 72 placed on the transfer arm 71 coincides with the axial centers of the upper and lower molding dies 73 and 74, the taper pin 75 is fitted into the fitting hole 76. And the stopper bolt 77 causes the stopper plate 78 to contact the contact surface 78 of the stopper plate 78.
It is necessary to adjust the position of the engaging contact portion 80 on the molding chamber 79 side so that the engaging contact portion 80 on the side of the molding chamber 79 is positioned so as to come into contact with a and be positioned. As shown in the figure, the inner surface of the upper plate 82 (forming chamber 79
Since it is fixed to the ceiling surface) of the molding chamber 79, the adjustment work from outside the cover 83 of the molding chamber 79 is practically impossible.
In order to perform the work, it is necessary to adjust the cover 83 while removing it each time. However, since this adjustment is performed at the time of molding, that is, in consideration of thermal expansion of the transfer arm 71 at high temperature, it is necessary to keep the molding device in a high temperature state. Therefore, in order to remove the cover 83, conversely, each time, Since the molding device had to be returned to a low temperature state, the adjustment time was long. Moreover, the inside of the cover 83 has the mold 7 at high temperature.
Since non-oxidizing gas is filled in order to prevent the oxidation of 3, 74, when the cover 83 is removed, the mold 73,
It is necessary to lower the temperature to a temperature at which 74 is not easily oxidized even when it is exposed to the atmosphere.

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention can adjust the position of the engaging abutting portion for adjusting the position of the transfer arm without removing the cover. An object is to provide a position adjusting device.

[Means and Actions for Solving Problems]

The device for adjusting the position of the transfer arm in the glass forming apparatus of the present invention is constructed so that the optical glass material is placed and supported so that it can be carried in and out at a predetermined position in the heating furnace and the forming chamber. An engaging contact portion that engages with and abuts the optical glass material mounting portion in the arm portion and the molding chamber side is provided, and the central axis of the optical glass material placed and supported on the transport arm portion is vertically moved. From the outside of the molding chamber, the fitting hole on the molding chamber side is formed in the same direction as the advancing and retreating direction of the transfer arm and in the vertical direction so that the mutual engaging abutting portions are engaged and abutted when they coincide with the axial center of the molding die. It is characterized by being configured to be adjustable.

〔Example〕

An embodiment of a position adjusting device for a transfer arm in a glass forming apparatus of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a perspective view of a glass forming apparatus equipped with a transfer arm position adjusting position according to the present invention, and FIG. 2 is a side sectional view of the same.
3a, 3b, 3c, and 3d are explanatory views of the main part of the device of the present invention, and FIGS. 4a, b, c, and d are the transfer of the gob plate in the glass forming device to the support part of the gob plate of the transfer arm. FIG.

As shown in FIG. 1, the glass molding apparatus 3 includes a molding main body 6 equipped with upper and lower molding dies 4 and 5, and a mold release for separating the molded glass lens from the upper and lower molding dies 4 and 5. A ring drive unit 7 and a transfer arm drive unit for transferring the optical glass material 2 placed on the magazine 8 to the preheating furnace 9, the main heating furnace (electric furnace) 10 and the molding point 12 in the molding chamber 11. 13 and a device base 14 and the like.

The upper and lower molds 4 and 5 are the table 15 on the device base 14.
It is arranged in a molding chamber 11 formed by four columns 17 standing on a lower plate 16 fixed to the upper plate 19, a cover 18 and an upper plate 19 closing the periphery of the columns. Further, the molding chamber 11 is provided with a gas suction port (not shown) in order to replace the inside of the molding chamber with a non-oxidizing gas. The upper mold 4 has an upper plate 19
The lower die 5 is fixed to a holder 20 fixed to the inner surface of the table via a mounting ring 21, and the lower die 5 is movably supported by a bearing 22 mounted on the table 15 in a vertically movable manner.
It is being fixed to 3 via the attachment ring 24. 25,2
6 is a heater.

Release rings 27, 28 for releasing the molded glass lenses from the respective molds 4, 5 are loosely fitted in the upper and lower molds 4, 5, and the respective release rings 27, 28 are driven. The upper and lower arms 29, 30 which are moved up and down via the section 7 are configured to exert a releasing function. The movable shaft 23 fixedly equipped with the lower die 5 is set to be vertically driven by an eccentric cam 32 which is rotationally driven via an encoder 31.

The transfer arm drive unit 13 is for driving the transfer arm 1 to move back and forth, and includes three cylinders 13 arranged in three stages.
The transfer arm 1 is set so as to be stopped and controlled at each position of the preheating furnace 9, the main heating furnace 10, and the molding point 12 via a, 13b, and 13c. Reference numeral 33 is a stopper for restricting the operation amount of each cylinder 13a, 13b, 13c.

In the glass forming apparatus 3, however, the optical glass material 2 is placed and supported on the magazine 8 via the cobb plate 34, and the gob plate 34 on the magazine 8 is shown in FIG. 3 (a). As described above, the transfer arm 1 is transferred and supported on a gob plate support 35 formed at the tip of the transfer arm 1. FIGS. 4 (a), 4 (b) and 4 (a) and 4 (b) show a configuration in which the gob tray 34 on the magazine 8 is transferred onto the gob tray support portion 35 of the transfer arm 1.
Shown in (c) and (d). That is, in FIG. 2 and FIG. 4 (a), the cylinder 36 of the piston rod 37 for pushing up the gob tray 34 is arranged at the lower position of the magazine 8.
As shown in FIG. 2B, the gob tray 3 is attached to the piston rod (movable rod) 37 of the cylinder 36 by the push-up portion 38 at the tip thereof.
4 is set so that it can be temporarily pushed up from above the magazine 8. The transfer arm 1 is arranged on the upper side of the magazine 8 and is moved in the direction of the arrow 39 in FIG. 4 (b) through the drive unit 13 so that the groove can be moved as shown in FIG. 4 (c). It is set so that the shaft center of the piston rod 37 can be operated to move to a position where the shaft center of the piston rod 37 and the shaft center of the gob plate support portion 35 are moved via 40. Then, by moving the piston rod 37 downward through the cylinder 36 in the state shown in FIG. 4 (c), as shown in FIG. 4 (d), the gob tray 34 is moved to the gob of the transfer arm 1. It is set and configured so that it can be transferred to the dish support portion 35.

Further, the magazine 8 on which a plurality of gob trays 34 are placed is sequentially conveyed from the inside of the supply chamber 41 (see FIG. 1), and supports the gob tray 34 on which the glass lens after the completion of molding is placed. The magazine 8 is set so as to be stored in the storage chamber 42 (see FIG. 1). Therefore, the gob trays 34 on the magazine 8 which are sequentially transported from the supply chamber 41 are first controlled to be stopped in the preheating furnace 9. The preheating furnace 9 is the optical glass material 2 on the magazine 8.
Is preheated to a temperature of about 400 ° C. together with the gob dish 34.

The optical glass material 2 preheated in the preheating furnace 9 is
The transfer arm 1 is transferred onto the transfer arm 1 by the gob plate transfer mechanism shown in FIGS. 4 (a), (b), (c), and (d).
It is set so as to be conveyed into the main heating furnace (electric furnace) 10 via the and is controlled to stop. The heating furnace 10 is for heating the preheated optical glass material 2 at a temperature not lower than the transition point, for example, at a temperature of 600 ° C. or higher to soften the optical glass material 2 into a moldable state. It consists of a furnace. The electric furnace is used because a high-temperature atmosphere that can heat and soften the optical glass material 2 can be obtained.

In the vicinity of the gob tray support portion (optical glass material mounting portion) and 35 of the transfer arm 1, as shown in FIGS. 4 (a) and 4 (b), the engagement contact provided on the molding chamber 11 side is provided. An engagement contact portion 51 that engages with and abuts the portion 50 is provided. Engagement contact part 5
1 is a contact between a stopper pin 52 and a taper pin 54 that fits into a fitting hole (oblong in the up / down direction) 53 formed in the stopper plate 52 on the engagement contact portion 50 side. The stopper bolt 55 is configured to come into contact with the surface 52a, and the taper pin 54 and the stopper bolt 55 are fixed to a support portion 56 protruding from the transfer arm 1. Taper pin 54
As shown in FIG. 4 (c), is a pin body 54a fitted into the fitting hole 53, and a tapered portion 54b formed at the tip.
And a screw portion 54c screwed to the rear portion,
It is fixed to the support portion 56 via a nut 57 that is screwed with the screw portion 54c. The stopper bolt 55 is composed of a screw rod, and is set so that the protruding length (the amount of advance / retreat) thereof can be adjusted via the nut 58. Needless to say, a common bolt may be used as the stopper bolt 55. Further, as shown in FIG. 3 (d), the contact portion 59 on the flange may be integrally formed on the taper pin 54, and the taper pin 54 and the stopper bolt 55 may be integrally formed. In FIGS. 3 (c) and 3 (d), reference numeral 60 designates a slit for pivoting operation, and it is desirable that the stopper bolt 55 is similarly provided and implemented.

The engagement contact portion 50 on the molding chamber 11 side is composed of an L-shaped stopper plate 52 provided with a fitting hole 53 for fitting with a taper pin 54 and a position adjustment base 63 as shown in FIG. 3A. The stopper plate 52 is supported on the upper surface of the position adjusting base 63 by two bolts 64 and 65 so as to be movable back and forth in the same direction as the moving arm 1 is moved. On the other hand, the position adjusting table 63 is supported on the upper surface of the upper plate 19 via two bolts 66 and 67 so as to be movable back and forth in a direction perpendicular to the moving back and forth direction of the transfer arm 1. The positional relationship between the two engaging contact portions 50 and 51 is
When the center axis of the optical glass material 2 placed on the transfer arm 1 coincides with the axis of the upper and lower molds 4 and 5, the taper pin 54 fits into the fitting hole 53 and the stopper bolt 55 fits into the stopper plate. It is adjusted so as to be in contact with the contact surface 52a of 52 and be positioned.

Next, the operation of the glass forming device 3 having the above structure will be described.

Among the gob trays on the magazine 8 discharged from the supply chamber 41, when the gob tray 34 on which the optical glass material 2 to be molded is placed reaches the preheating furnace 9, the magazine 8 is stopped and the gob tray is stopped. Optical glass material 2 with 350
Preheat to a degree.

Next, the push-up cylinder 36 is operated to raise the piston 37 and the gob tray 34 on the transfer arm 1 is pushed up, and then the first cylinder 13a is operated to operate the push-up cylinder 36 as shown in FIGS. 3 (a), (b),
The gob tray 34 is transferred onto the transfer arm 1 in the operation sequence shown in (c) and (d).

Next, the second cylinder 13b is actuated to move the transfer arm 1 forward and stop it in the main heating furnace 10 to heat the optical glass material 2 to a temperature of the transition point or higher, for example, a temperature of 600 ° C. or higher. As a result, the optical glass material 2 is softened by heating to a moldable viscosity.

Next, the third cylinder 13c is operated to transfer the transfer arm 1 into the molding chamber 11. The transfer arm 1 includes an engaging contact portion 5
1 stops at the position where it is fitted and abutted with the engaging abutting portion 50 on the forming chamber 11 side. In this state, the center axis of the optical glass material 2 placed on the transfer arm 1 and the upper and lower molding dies 4,
The position of the engagement abutting portion 50 on the molding chamber 11 side is adjusted so that the axis center of 5 surely matches. In particular, in this embodiment, the position of the stopper plate 52 in the engaging contact portion 50 on the molding chamber 11 side can be adjusted outside the molding chamber 11, so that the alignment work can be performed in a short time.

[Effect of device]

As is apparent from the above description, according to the transfer arm adjusting device in the glass forming apparatus of the present invention, the positioning of the transfer arm is performed by adjusting the cover of the forming chamber each time as in the case of the conventional glass forming apparatus. Since there is no need to soot, the molding apparatus can be kept in a high temperature state, and adjustment work can be performed in a short time.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a glass forming apparatus equipped with a transfer arm position adjusting device according to the present invention, and FIG.
3a, 3b, 3c, and 3d are explanatory views of the main part of the device of the present invention, and FIGS. 4a, b, c, and d are the actions for transferring the gob tray in the glass forming apparatus to the gob tray support portion of the transfer arm. FIG. 5 is an explanatory view of the state, and FIG. 5 is a cross-sectional view of an essential part showing a conventional glass forming apparatus. 1 ... Transfer arm 2 ... Optical glass material 3 ... Glass molding device 4,5 ... Upper and lower molding dies 11 ... Molding chamber 35 ... Gob plate support 50,51 ... Engagement abutment 53 ... ... Mating hole

Claims (1)

[Scope of utility model registration request] 1. A transfer arm in a glass molding apparatus configured to support and mount an optical glass material so that the optical glass material can be carried in and out at a predetermined position in a heating furnace and a molding chamber. And a molding chamber side are provided with engaging abutting portions for engaging and abutting each other, and the central axis of the optical glass material placed and supported on the transfer arm portion is aligned with the axial center of the upper and lower molding dies. The fitting hole on the molding chamber side is configured to be adjustable from outside the molding chamber in the same direction as the advancing and retreating direction of the transfer arm and in the vertical direction so that the engaging and abutting portions of the conveying arm engage and abut each other. The position adjusting device for the transfer arm in the glass forming device.