JPS62182122A - Transfer arm in glass forming apparatus - Google Patents

Abstract

PURPOSE:The titled arm, designed to engage and bring mutual engaging and contacting parts to engage and come into contact when the central axis of an optical glass material placed and supported on a transfer arm part is in alignment with the central axis of a mold and capable of carrying out good forming. CONSTITUTION:An engaging and contacting part 51 capable of engaging and coming into contact with an engaging and contacting part 50 consisting of an L-shaped stopper plate 52 and engaging hole 53 engaging with a tapered hole pin 54 consisting of a body part (54a) and tapered part (54b) is provided near an optical glass carrying part 35 in a forming chamber. The engaging and contacting part 51 is constructed of the engaging tapered pin 54 formed on the stopper plate 52 on the side of the engaging and contacting part 50 and a stopper bolt 55 capable of coming into contact with a contacting surface (52a) of the stopper plate 52 and the tapered pin 54 and bolt 55 are fixed on a support part 56 protrusively formed on a transfer arm 1. The engaging and contacting parts 50 and 51 are then set so that the pin 54 may be engaged with the engaging hole 53 of the stopper plate 52 and the bolt 55 may be brought into contact with the contacting surface (52a) of the stopper plate 52 and positioned when the central axis of an optical glass material 2 placed on the arm 1 is in alignment with the central axes of the top and bottom forces.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a transport arm in a glass forming apparatus configured to carry an optical glass material into and out of a heating furnace and a forming chamber while supporting it. Regarding.

[Prior Art] Generally, in a glass forming apparatus, an optical glass material is heated and softened to a moldable viscosity, and the heated and softened optical glass material is compressed and molded using upper and lower molds, and then annealed. In this method, a transport arm is used as a means for transporting the optical glass material into and out of the heating furnace and the molding chamber. This transfer arm is driven and operated via a drive device such as a cylinder, and the optical glass material is placed and supported on the mounting section provided at the tip of the arm, and then placed inside the heating furnace and molded. It is configured to be carried in and out of the room.

According to configuration L, an optical glass material as a molded object is placed on a transport arm, and the transport arm is advanced and retreated via a drive device, thereby transporting the optical glass material into nine preheating furnaces. and can be carried in and out of the molding chamber.

Therefore, the optical glass material can be heat-treated to a moldable viscosity and the optical glass material subjected to heat-softening treatment can be transported to the molding point in the molding chamber via the transport arm. Further, the molded product after molding can be carried out to the outside of the molding room and then subjected to an annealing treatment.

[Problems to be Solved by the Invention] However, the above conventional transfer arm has the following problems.

That is, as is known, when the optical glass material is transported to the molding point in the molding chamber via the transport arm, the central axis (axis center) of the optical glass material is aligned with the line connecting the axes of the upper and lower molds. Otherwise, efficient and good molding cannot be performed.For this reason, it is necessary to make sure that the axis of the upper F mold and the central axis of the optical glass material placed on the transfer arm coincide at room temperature. Generally, the stopping position of the transport arm is adjusted accordingly.

However, even if the above adjustment is made in advance, when the optical glass material is conveyed into nine preheating furnaces and heated to a temperature above the transition point (for example, 600°C or above), The transport arm itself that supports the optical glass material also expands thermally, and as a result, the alignment of the adjusted central axis of the optical glass material with the axes of the upper and lower molds becomes misaligned during molding, resulting in poor quality. There was a problem that molding could not be performed. In addition, since the transfer arm is long because it requires a large operating stroke, it is prone to bending and bending, which may cause it to touch vertically at the forming point. Also, good molding may be hindered.

The present invention is an IF! of the above-mentioned prior art! This was designed in consideration of problem I, so that the central axis of the optical glass material always aligns with the axes of the upper and lower molds even if the transport arm is slightly bent or thermally deformed. An object of the present invention is to provide a transport arm for a glass forming apparatus.

Means and operation for solving problem E] The present invention provides an engagement abutment part that engages and abuts each other in the vicinity of the optical glass material at part in the transport arm part and on the molding chamber side, and the transport arm part When the central axis of the optical glass material placed and supported on the upper and lower molds coincides with the axes of the upper and lower molds, the mutually engaging abutting portions engage 'l! 'Ivc, so that the central axis of the optical glass material always coincides with the axes of the upper and lower molds.

[Example] Hereinafter, an example of the present invention will be described in detail using the drawings.

FIG. 1 is a perspective view of a glass forming apparatus 3 for forming an optical glass element (optical glass material) 2 (see FIG. 2) equipped with a transport arm l according to the present invention. FIG. 2 is a schematic explanatory diagram of the glass forming apparatus 3 shown in cross section in order to facilitate understanding of each configuration in the figure.

As shown in Figure 1, the glass molding device 3 has upper and lower molds 4.
．． 5, a mold release ring drive unit 7 for releasing the molded glass lens from the upper and lower molds 4 and 5, and an optical glass element 2 placed on a magazine 8. The preheating furnace 9 is composed of a main heating furnace (electric furnace) 10, a transport arm driving section 13 for transporting the preheating furnace to a molding point 12 in a molding chamber 11, a device base 14, and the like.

The upper and lower molds 4 and 5 are placed on the table 1 of the device base 14J-.
Four pillars 17 erected on the lower plate 16 fixed to 5
It is arranged in a molding chamber 11 formed by a cover 18 and an upper plate 19 that close the periphery of the molding chamber. Upper mold 4 is
It is fixed via a mounting ring 21 to a holder 20 fixed to the inner surface of the second plate 19, and the do type 5 is attached to the table 15.
It is fixed via a mounting ring 24 to a movable shaft 23 which is supported so as to be freely movable in the L direction via a bearing 22 mounted on the holder.

Reference numerals 25 and 26 indicate heaters.

In the upper and lower molding chambers 4.5, mold release rings 27.28 for releasing the molded glass lenses from the respective molds 4, 5 are loosely fitted. The mold release function is performed through upper and lower arms 29 and 30 that are moved up and down through the section 7. The movable shaft 23 on which the lower die 5 is fixedly mounted is set to be driven by an eccentric cam 32 which is rotationally driven via an encoder 31.

The transport arm drive unit 13 is for driving the transport arm l forward and backward, and includes three cylinders 13a arranged in three stages.
, 13b, 13c, the configuration is such that the transfer arm 1lep, 99 heating furnaces, heating furnace 10, and molding point 12 can be stopped at each position. 33 indicates the operation of each cylinder 13a, 13b, 13c (7); a
Regulation use nostovpa.

The optical glass element is placed and supported on the magazine 8F via a gob plate 34, and the gob plate 34 on the magazine 8 is formed at the tip of the transport arm 33 as shown in FIG. 3(a). FIG. 4(a) shows a structure in which the gob plate 34 on the magazine 8, which is waiting to be transferred and supported by the gob plate support 351, is transferred onto the gob plate support 35 of the transport arm l. 8 is shown in (b), (c), and (d). That is, the second
As shown in FIG. 4 and FIG. 4(a), a cylinder 36 for pushing up the gob plate 34 is disposed below the magazine 8, and as shown in FIG. 4(b), this cylinder 36
It is set so that the gob plate 34 can be temporarily pushed up from above the magazine 8 by a pushing up portion 38 at the tip of the piston rod (Til moving rod) 37. The transport arm l is
It is arranged at the side L section of the magazine 8, and is moved in the direction of arrow 39 in FIG. 4(b) via the drive section 13.
As shown in FIG. 4(C), the piston rod 37 is set to be moved through the groove 40 to a position where the axial center of the piston rod 37 is coaxial with the axial center of the gob plate support part 35. Then, by operating the piston rod 37 downward in the state shown in FIG. 4(C), the gob plate 34 is attached to the gob plate supporting portion 35h of the transfer arm l, as shown in FIG. 4(d). The settings are configured so that they can be transferred.

The magazine 8 on which a plurality of gob plates 34 are placed is located in the supply chamber 41.
A magazine 8 is designed to be transported sequentially from the inside and supports the gob plate 34 on which the glass lens after molding is completed.
is configured to be stored in the storage chamber 42. Each gob plate 34 on the magazine 8 that is sequentially transported from inside the supply chamber 41 is first controlled to stop inside the preheating furnace 9. The preheating furnace 9 is for preheating the optical glass element 2 on the magazine 8 together with the gob plate 34 to a temperature of about 400°C.

The optical glass element 7-2 preheated in the Bizen thermal furnace 9 is shown in FIGS. 4(a), (b), (C), and (d).
It is set so that the gob plate is transferred onto the transfer arm l- by the gob plate transfer mechanism shown in FIG. It is. This heating furnace 10 is for heating the preheated optical glass element 2 at a temperature of 600° C. or higher, for example, to soften the optical glass element 2 to a moldable state. , consists of an electric furnace. The reason why this heating furnace is used is that a high temperature atmosphere sufficient to heat and soften the optical glass material 2 can be obtained.

In the vicinity of the gob plate support portion (optical glass material placement portion) 35 in the transport arm l, there is a portion shown in FIG. 3(a).

As shown in (b), an engagement contact portion 51 is provided which engages and abuts the engagement contact portion 50 disposed on the molding chamber 11 side. The engagement contact portion 51 has a tapered pin 5 that fits into a fitting hole 53 formed in the stopper plate 52 on the engagement contact portion 50 side.
4 and a stopper bottle 55 that comes into contact with the contact surface 52a of the stopper plate 52, and the taper bottle 54 and the stopper port 55 are fixed to a support portion 56 that projects from the transfer arm l. The taper bin 54 is shown in FIG. 3(c).
As shown in , the bottle main body portion 54 fits into the fitting hole 53.
a, a tapered part 54b formed at the tip, and a threaded part 54c threaded at the rear part, and can be fixed to the support part 56 via a nut 57 that is screwed into the threaded part 54c. be. The stopper port 55 is composed of a screw rod,
It is set so that its protrusion length (advance/retreat amount) can be adjusted via a nut 58. Of course, the stopper port 55 may be a commonly used port. Also, Figure 3 (
As shown in d), the flange 1 and the contact portion 59 are formed on the tapered bottle 54 to have a weight of - (not necessarily one weight), and the taper bottle 54 and the stopper port 55 have a weight of -. Good too. In FIGS. 3(c) and 3(d), the reference numeral 60 indicates a pickpocket for rotational operation; 1. The engagement abutment portion 50 on the molding chamber side, which is preferably provided also on the stopper port 55, has an L-shaped spacer plate 52,
The stopper plate 52 has a fitting hole 53 that fits into a taper pin 54, and the stopper plate 52 has a port 6 as shown in FIG.
The positional relationship between the internal joint abutting parts 50 and 51, which are vertically fixed on the inner surface of the upper plate 19 (the ceiling surface of the molding chamber 11) via the upper plate 1, is such that they are placed on the transfer arm 1. When the central axis of the optical glass material 2 coincides with the axes of the upper and lower molds 4 and 5, the taper pin 54 fits into the fitting hole 53, and the stopper 55 comes into contact with the contact surface 52a of the stopper plate 52. The configuration is such that they are positioned in contact with each other. Note that it is preferable to form a radius-shaped chamfer (or a C-chamfer) on the end surface of the fitting hole 53. The hole shown by 62 is a hole for a port 61.

Next, the operation based on the above configuration will be explained.

When the gob plate 34 on which the optical glass element 2 to be molded is placed among the gob plates 34 on the magazine 8 discharged from the supply chamber 41 reaches the preheating furnace 9, the magazine 8 is stopped. The gob plate 34 and the optical glass element 2 are preheated to about 350°C.

Next, the piston rod 37 of the push-up cylinder 36 is raised to push up the gob plate 34 on the transfer arm 1, and then the first cylinder 13a is actuated, as shown in FIGS.
), (c), and (d), the gob plate 34 is transferred to the transfer arm 1.

Next, the second cylinder 13b is activated to advance the transport arm 1, and the optical glass element 2 is heated to a temperature higher than the transition point (for example, 600° C.) by being stopped in the main heating furnace 10. Thereby, the optical glass element 2 is heated and softened to a viscosity that can be molded.

Next, the third cylinder 13c is operated to transport the transport arm l into the molding chamber 11. The Wl feed arm 1 stops at a position where the engaging contact portion 51 engages (fits) and abuts the engaging contact portion 50 on the molding chamber 11 side. In this state, the central axis of the optical glass element 2 placed on the transport arm IL and the axes of the upper molds 4 and 5 are reliably aligned. In particular, in this embodiment, since the engagement abutment portion 51 is disposed close to the gob plate support portion 35, even if the transfer arm l is thermally deformed and stretched in the heating furnace 10, , since the distance between the gob plate support part 35 and the engagement abutment part 51 is short, there is almost no deformation, and therefore the central axis of the optical glass element 2 is approximately aligned with the axis of the upper and lower molds 4.5. It can be molded with. In addition, during positioning, the taper bin 54 and the fitting hole 53 of the stopper plate 52 are fitted, so even if the transport arm l swings downward or horizontally during operation,
This allows molding to be performed while stopping at a precise molding position, which improves the quality of the molded product.

Note that, according to the above configuration, the tapered bin 54. A stopper port 55 is disposed; a fitting hole 53 is provided on the molding chamber 11 side. Although the stopper plate 52 having the contact surface 52a is arranged, the present invention is not limited to this.
It goes without saying that the transfer arm side may be provided with a fitting hole and an abutment surface, and the molding chamber side taper bin and stopper bolt may be provided. Further, the stopper plate 52 may be configured to be freely adjustable in the L downward direction.

[Effects of the Invention] As described above, according to the present invention, even if the transfer arm is thermally deformed, the central axis of the optical glass and the axes of the upper and lower molds can always be aligned. , it is possible to perform good molding.

[Brief explanation of drawings]

Figure 1 is a perspective view of a molded glass product equipped with a transport arm according to the present invention, Figure 2 is a schematic explanatory diagram thereof, and Figure 3 (a).
, (b), (c), and (d) are explanatory diagrams of an embodiment of the main part of the present invention, and FIG. 4 (a). (b), (c), and (d) are explanatory diagrams of the action of the main part of the present invention. ■...Transport arm 2...Optical glass material 4.5...Upper and lower molds 9.10...Heating furnace 11...Molding chamber 12...Molding point 13...Drive section 50. 51... Engagement abutment part patent applicant Olympus Optical Co., Ltd. agent Patent attorney Takeshi Nara "- system complete system 11F
−';! from jcIM)6. Supplement + 1) August 1981, 1911! 2) 1. Indication of 1988 Patent Application No. 25235 2. Title of the invention
(4) Transport arm 3 in glass forming equipment, person who makes corrections
(Relationship with Matter 5. Patent Application Person Address: 2-43-2 Hatagaya, Shibuya-ku, Tokyo, Pa.6
) 4. Agent ゝ-1' Amend the correct content "Claims" as shown in the attached sheet. "L lower molding chamber 4." written on page 7 line 14 of the specification.
5" is corrected to "upper and lower molds 4.5". r(a) described on page 8, line 18 of the specification. 8 is shown in (b), (c), and (d). ” to r(a). Shown in (b), (C), and (d). ” he corrected. "Gob plate 34" written on page 13, line 5 and line 6 of page 13 of the specification is corrected to "gob plate 34.""About350°C" written on page 13, line 7 of the specification is corrected to "about 400°C.""The stopper plate 52 is in the -vertical direction" written in the seventh line of page 15 of the specification is corrected to "the stopper plate 52 is in the vertical and horizontal directions." Attachment 2, Claims (1) A transport arm in a glass molding apparatus configured to place and support an optical glass material and carry it into and out of a predetermined position in a heating furnace and a molding chamber. An engagement abutment part that engages and abuts with each other is provided near the optical glass material mounting part and on the molding chamber side in the part. It is characterized in that the engaging and abutting portions are configured to engage and abut each other when the central axis of the optical glass material placed and supported on the transfer arm coincides with the axes of the upper and lower molds. Transfer arm in glass forming equipment. (2) The engagement abutment part in the transfer arm part is composed of an engagement pin and a stopper bolt that fit and abut the engagement abutment part constituted by the engagement hole and the abutment surface part on the molding chamber side. A transport arm in a glass forming apparatus according to claim 1, characterized in that: The conveyance arm in the glass forming apparatus according to claim 1. (4) A patent claim characterized in that the fitting hole on the molding chamber side that engages with the engagement pin of the conveyance arm is adjustable in the vertical direction and the horizontal direction. The conveying arm in the glass forming apparatus according to item 1 or 2. (5) The engaging contact portion of the conveying arm portion is an engaging contact portion consisting of an engaging pin and a stopper bolt on the molding chamber side. 2. The conveying arm in a glass forming apparatus according to claim 1, wherein the conveying arm is an engaging contact portion having a fitting hole and a contact surface that fit into and come into contact with each other.

Claims (5)

[Claims] (1) In a transport arm of a glass forming apparatus configured to place and support an optical glass material and carry it into and out of a predetermined position in a heating furnace and a molding chamber, an optical glass material placement part in the transport arm section. and the molding chamber side are provided with engaging contact portions that engage and abut each other, and when the central axis of the optical glass material placed and supported on the transfer arm portion coincides with the axis of the upper and lower molds. A conveyor arm in a glass forming apparatus, characterized in that the engaging and abutting portions are configured to engage and abut each other. (2) The engagement abutment part in the transfer arm part is formed by an engagement pin and a stopper bolt that fit and abut the engagement abutment part constituted by the engagement hole and the abutment surface part on the molding chamber side. A conveying arm in a glass forming apparatus according to claim 1, characterized in that: (3) The transport arm in the glass forming apparatus according to claim 1, wherein the stopper bolt is adjustable in forward and backward movement. (4) The glass forming apparatus according to claim 1 or 2, wherein the fitting hole on the molding chamber side that engages with the engagement pin of the transfer arm is vertically adjustable. Transfer arm in. (5) The engagement abutment part of the transfer arm part has a fitting hole and a contact surface that fit and abut the engagement abutment part made of an engagement pin and a stopper bolt on the molding chamber side. 2. The transport arm in a glass forming apparatus according to claim 1, wherein the transport arm is a contact part.