JPS59107930A - Device for sealing opening end of double superposed glass tubes - Google Patents

Abstract

PURPOSE:To provide a titled device which seals efficiently and thoroughly inside and outside glass tubes by constituting the titled device wherein the double superposed glass tube is rotated and the opening end thereof is melted and butted by heating while the inside glass tube is supported from the inside with a forward and backward moving rod. CONSTITUTION:An outside glass tube 5 provided with an evacuation pipe 3 at one end is supported with bearing parts 16, 29, and an inside glass tube 8 having the small diameter and having the length approximately equal to the length of said tube is superposed on the outside tube to form double tube 1. The top end of a forward and backward moving rod 23 which is moved forward and backward by an air cylinder 24 mounted on a supporting part 22 for the inside tube is advanced into the tube 8 from its opening end and the tube 8 is supported with the head part 25 of the forward and backward moving rod rotating integrally with the tube 8 and attached to the top end of said rod. While the tube 1 is rotated around its axis by a rotating mechanism consisting of a reversible motor 46 or the like attached to a support 31, the opening end is melted by heating with a gas burner in a heating part 27 and the softened opening ends of the tubes 5, 8 are butted and sealed by a spatula part 28.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for sealing the open ends of an outer tube and an inner tube of glass tubes stacked on top of each other.

For example, as a solar collector tube, with a transparent outer tube made of glass and a selective absorption film on the outer surface to enhance the heat receiving effect? There is a vacuum double collector tube with a glass inner tube. In manufacturing such a double collector tube, there is a step of inserting the inner tube into the outer tube, doubling the electric current, and joining and sealing the open ends of both tubes together. This sealing work requires perfect airtight sealing, which is extremely troublesome and requires skill.

In view of the above points, this invention makes it possible to easily and reliably perform the uniform sealing work of the open ends of double-wound glass tubes, including the collector tube 21. The present invention provides an apparatus for sealing the open ends of double stacked glass tubes, and its gist is to rotatably support the unprocessed ends of double stacked glass tubes. a support part provided with a bearing part; a support part provided with a reciprocating rod that enters into an inner glass tube opening at the processed end of the glass tube and rotatably supports the glass tube; and a processed end of the glass tube. a heating part that heats the outer glass tube from the outer circumferential direction; a spatula part that guides the processed end of the outer glass tube inward that has been softened by heating; It is constructed with a gripping and rotating section that rotates the glass tube.

Hereinafter, this invention will be explained in detail based on embodiments shown in the drawings.

In the drawings, reference numeral 1 is a double layered glass tube on the inside, with a stem portion 2 formed on the negative side, and an exhaust pipe 3 protruding outward from the axial center of this stem portion 2. Into an outer glass tube 5 having an open processed end 4, an inner glass tube 8 whose minus side is closed to form a bottom 6 and whose open end 7 on the other side is flared is inserted and overlapped.

9, 9°... are plate spring-like spacer springs that are installed at equal intervals in the circumferential direction on the outer peripheral surface of the inner glass tube 8 near the bottom 6 of the inner glass tube 8, They each have a corrugated portion 10 and a flat plate portion 11 extending to a predetermined length, and maintain a predetermined distance 12 between the inner circumferential surface of the outer glass tube 5 and the outer circumferential surface of the inner glass tube 8,
Moreover, the outer glass tube 5 and the inner glass tube 8 are integrated by the force of the respective corrugated portions 10. Each waveform portion 1 of each spacer spring 9
The strength of the elastic force of 0 means that the inner glass tube 8 is the outer glass tube 5.
Although the outer glass tube 5 does not interfere with insertion into the
It is strong enough to be integrated with the inner glass tube 8 and rotated. 13, 13. . . . are abutting bodies provided at the tops of the crests of the respective corrugated portions 10 of each spacer spring 9, and these abutting bodies 13 abut against the inner circumferential surface of the outer glass tube 5. 14 is a getter metal supported by each tip of each flat plate portion 11 of each spacer spring 9; 15 is a mounting band for mounting each spacer spring 9 on the outer peripheral surface of the inner glass tube 8 at equal intervals in the circumferential direction; be. Although not shown in the drawings, a spacer spring 9 having only a corrugated portion 10 is similarly attached to an intermediate portion of the inner glass tube 8 in the longitudinal direction using an attachment band 15.

A bearing 16 rotatably supports the stem portion 2 of the outer glass tube 5; a bearing 17 frictionally engages the stem portion 2 of the outer glass tube 5; and a bearing rotatably supports the support 17. It consists of 18 parts. The support body 1T is made of a self-lubricating resin such as Teflon, and has a recess 19 that frictionally engages with the outer surface of the stem portion 2 of the outer glass tube 5. A protruding exhaust pipe 30 through hole 20 is formed at the axial center of the stem portion 2 of the exhaust pipe 30 . Note that 21 is a frame of the support portion 16.

22 is the inner glass tube 8 at the processed end of the glass tube 1.
A supporting part that enters into the open end 7 of the inner glass tube 8 and rotatably supports the glass tube 1. It consists of an advancing/retracting rod 23 that moves in and out, and an air cylinder 24 that moves the advancing/retracting rod 23 back and forth a predetermined distance. The head 25 at the tip of the advancing/retracting rod 23 that enters into the open end 7 of the inner glass tube 8 has an elastic force strong enough to come into contact with the inner circumferential surface of the inner glass tube 8 with the minimum frictional force. A plurality of mountain-shaped leaf springs 26 are mounted at four equal intervals in the circumferential direction of the head 25 and in two rows in the longitudinal direction of the head 25. In addition, the head 2 is equipped with a plurality of leaf springs 26 of the advancing/retracting rod 23.
5 enters the inner glass tube 8 to a position where it is not heated by the heating section described later.

Therefore, the outer glass tube 5 and the inner glass tube 8 are integrated by each spacer spring 9 attached to the outer peripheral surface of the inner glass tube 8, and the unprocessed end The stem portion 2 of the outer glass tube 5 is frictionally engaged with the support body 17 of the support portion 16 and is freely rotatable, and the processed end thereof is connected to the head of the retractable rod 23 on the inner peripheral surface of the inner glass tube 8. A plate t attached to the outer peripheral surface of the portion 25
It is supported by the s''1 screw 26 with minimal frictional force and is rotatable.

2γ is a heating section that heats the open end of the glass tube 1 from the outer circumferential direction of the outer glass tube 8 until it becomes soft, and a burner is used as this heating section 27.

Reference numeral 28 denotes a spatula portion that guides inward the processed end portion 4 of the outer glass tube 5 that has been softened by heating by the heating portion 27, and the processed end portion of the outer glass tube 5 that has been softened by operating this spatula portion 28. 4
is guided from the outside to the inside and joined to the flared open end 7 of the inner glass tube 8 which has also been softened, and the processed end 4 of the outer glass tube 5 and the flared open end of the inner glass tube 8' are joined. 1 and are sealed.

Reference numeral 29 denotes a gripping and rotating portion that circumscribes and grips the outer peripheral surface of the outer glass tube 5 and rotates the glass tube 1, and is configured as follows.

That is, 30 is a substrate fixed to a support 31, and this substrate 30 is formed with an insertion hole 32 into which the glass tube 1, which is integrally stacked with the outer glass tube 5 and the inner glass tube 8, is inserted. .

Three roller support rods 33 are provided on one side of the substrate 30 so as to be movable in a centrifugal direction with respect to the insertion hole 32 formed in the substrate 30, and are provided radially with respect to the insertion hole 32. These three roller support rods 33 are housed in holes 36.37 drilled in each of the double inner and outer brackets (34.35) formed on one side of the substrate 30, and each roller support rod 33 Each spring 39 is interposed between the flange body 38 and the inner bracket 34 provided in the
As a result, the insertion hole 32 is biased in the centrifugal direction.

Reference numerals 40, 40, and 40 denote frames that are integrally provided at the ends of each roller support rod 33 in the centripetal direction, and rollers 41, 41, 4 that circumscribe the outer surface of the outer glass tube 5 are installed inside the frame.
1 are individually and rotatably supported. Each frame 40. That is, in order to allow each roller support rod 33 to rotate about its respective axis in the centrifugal direction, each roller support rod 33 is provided with a small gap 42 maintained between it and the substrate 30. It is being

Therefore, each roller 41 supported at the end of each roller support rod 33 in the centripetal direction via each frame 40
The rollers 41 are also rotatable about their respective centrifugal axes of the roller support rods 33, and each roller 41 is configured to slat the glass tube 1 in the direction of the support portion 16 when rotated. There is.

To explain in detail the three rollers 41, 41, 41 circumscribing the outer surface of the outer glass tube 5, the rollers are supported at the end of each roller support rod 33 in the centripetal direction via each frame 40. 41.41.41, one of which is a drive roller 41a, is rotatably supported by a rotating shaft 43 within the frame body 40 of the drive roller 41a. The rotating shaft 43 is extended to the outside of the substrate 30, and a pulley 44 is provided at this extended portion so as to protrude from the other side of the substrate 30. 45 is pulley 44
and a pulley 47 provided on the rotating shaft of the reversible motor 46. Therefore, the drive roller 41a is rotated by the drive of the reversible motor 46. Reference numeral 48 indicates a needle bearing received on the rotating shaft 431, and reference numeral 49 indicates an escape groove formed in the substrate 30 so as not to obstruct movement of the pulley 44, which moves as the drive roller 41a moves back and forth in the centrifugal direction. The other two rollers 41 and 41 are provided with needle bearings 50 and 50' in frames 40 and 40 respectively provided at the centripetal end of each roller support rod 33 so that they can rotate freely. respectively through the supporting shafts 51 and 51
Supported by

Reference numeral 52 designates a tapered cam for gripping and operating the outer glass tube 5, and includes a ring-shaped cam grating 53 provided on one side of the base plate 30 so as to be able to rotate forward and backward at a required angle, and on each roller support rod 33 provided on the base plate 30. The tapered cam grooves 54 are respectively formed on the inner peripheral surface of the cam plate 53 at corresponding positions. And camfloat 5
Each dome-shaped head of each roller support rod 33 can freely slide into each tapered cam groove 54 formed in 3.

The roller support rods 33 are in contact with each other so as to be rotatable about their respective centrifugal axes, and the cam plate 53 is rotated to the left in FIG. 4, that is, in a counterclockwise direction. Cam plate 5 in the state shown in
3, each roller support rod 33 is compressed in the centripetal direction, and each roller 41 supported at the end of each roller support rod 33 in the centripetal direction advances in the centripetal direction to fill the insertion hole of the substrate 30. The glass tube 1 inserted into the tube 32 can be grasped from the outside. A ring 55 rotatably supports the cam plate 53, and is fixed to the base plate 30 with bolts 56.

Reference numeral 57 is an air cylinder, and the tip of the cylinder rod 58 is connected to the cam plate 53 of the taper cam 52 via a connecting rod 59, and as the cylinder rod 58 moves forward and backward, the cam plate 53 of the taper cam 52 is moved forward or backward at the required angle. It is designed to rotate. Reference numeral 60 denotes an escape hole formed in the substrate 30, into which the connecting rod 59 is movably inserted.

Reference numeral 61 denotes a support portion 16 that rotatably supports the unprocessed end of the glass tube 1. A support part 22 that rotatably supports the processed end of the glass tube 1. This is a base on which a gripping/rotating part 29 for circumscribing and gripping the outer surface of the outer glass tube 5 and rotating the glass tube 1 is attached.

Next, the operation of the present invention will be explained based on the above embodiment.

First, the glass tube 1, in which the outer glass tube 5 and the inner glass tube 8 are integrally stacked, is held by the substrate 30 of the gripping rotation unit 29.
It is then inserted into the insertion hole 32 formed in the glass tube 1, and then engaged with the stem portion 2 of the outer glass tube 5, which is the unprocessed end of the glass tube 1, and the support body 17 of the exhaust pipe 3tl-support portion 16.

Next, the air cylinder 24 of the support part 22 that supports the processed end of the glass tube 1 is activated to advance the advancing/retracting rod 23 (the first
leftward in the figure), and the head 25 at the tip of the retractable rod 23
into the inner glass tube 8 to a position where it is not heated by the heating section 27. In this case, the head 25 of the advancing and retracting rod 23
A plurality of leaf springs 26 are attached to the outer peripheral surface of the
Each of the leaf springs 26 has a resilient force strong enough to come into contact with the inner circumferential surface of the inner glass tube 8 with a minimum frictional force, so that the head 25 of the advancing/retracting rod 23 is pushed into the inner glass tube 8. There will be no obstacle to entry.

Next, the cam plate 53 of the taper cam 52 connected to the tip of the cylinder rod 58 is moved as shown in FIG. Each roller support rod 23 rotates to the left, that is, counterclockwise, and has its dome-shaped head slidably in contact with each tapered cam groove 54 formed in the cam plate 53. The rollers 41a, 41.41, which are pressed in the centripetal direction against the elastic force of the spring 39 and are supported by the roller support rods 33, move forward in the centripetal direction and move centripetally. Grasp the glass tube 1 located outward. After the glass tube 1 is gripped by the rollers 41a, 41.41 in this manner, the reversible motor 46 is driven to rotate the drive roller 41a. This drive roller 41a
(7) Due to the rotation, the glass tube 1 held by each roller 41a, 41.41 rotates. At this time, since each frame 40 of each roller support rod 33 that supports each roller 41 respectively forms a gap 42 with the substrate 30, each roller 41 supports the glass tube 1 during rotation. Since the glass tube 1 is configured to give streaks in 16 directions, the glass tube 1 rotated by each roller 41 receives thrust in the direction of the support 16, and the unprocessed end of the glass tube 1 is applied to the support 16. The glass tube 1 is pressed into engagement with the support 17, so that the processed end of the glass tube 1 always maintains a constant position.

Next, the processed end of the rotating glass tube 1 is placed in the heating section 2.
7, and when the processed end 4 of the outer glass tube 5 is softened by the heating, operate the spatula part 28 to direct the processed end 4 of the outer glass tube 5, which has been softened by the heating, from the outside to the inside. and join it to the flared open end 7 of the inner glass tube 8, which has also been softened. Then, the processed end 4 of the outer glass tube 5 and the open end 7 of the inner glass tube 8 are sealed.

When the sealing work of the open end of the glass tube 1 is completed in this way, the operation of the spatula section 28 is stopped and the heating section 2
The heating by 7 is also stopped, and then the reversible motor 4
6 and stop the rotation of the drive roller 41a, the rotation of the glass tube 1 is stopped, and then the cylinder rod 58 is advanced to rotate the cam plate 53 to the right in FIG. 4, that is, in the clockwise direction. Rotate it.

This rotation of the cam plate 53 causes the cam plate 53 to
The roller support rods 33, which are moving forward and pressed in the centripetal direction by the tapered cam grooves 54 formed in the cam grooves 54, are released from the pressure, and move backward due to the elastic force of the springs 39. Each roller 41 supported by the roller support rod 33 is also supported by each roller support rod 33.
As the rollers 41 recede, they retreat and separate from the outer surface of the glass tube 1, and the glass tube 1 is released from the grip of the rollers 41. Next, the air cylinder 24 of the support part 22 is operated to move the advancing/retracting rod 23 backward (rightward in FIG. After releasing the support, the unprocessed end of the glass tube 1 and the support body 17 of the support part 16 are disengaged, and the glass tube 1 whose open end is sealed by an appropriate means is placed next. Transport to processing equipment, storage area, etc.

The present invention has been described above based on the embodiments, but the present invention includes a support portion provided with a bearing portion that rotatably supports the non-processed end portions of double stacked glass tubes; a support part provided with a retractable rod that enters into the inner glass tube opening at the processed end and rotatably supports the glass tube; and a heating part that heats the processed end of the glass tube from the outer circumferential direction of the outer glass tube. , consisting of a spatula part that guides the processed end of the outer glass tube softened by heating inward, and a grip rotation part that circumscribes and grips the outer peripheral surface of the outer glass tube and rotates the glass tube. Therefore, it is possible to easily and reliably seal the open ends of double stacked glass tubes such as double collector tubes, and the sealing work can be done mechanically. Since the work is a simple one, all that is required is confirmation and a few switch operations, and work safety and work efficiency can be improved.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view of the invention, FIG. 2 is an enlarged plan view showing details of the state of engagement between the glass tube and the support, and FIG. 4 is an enlarged sectional view showing the details of the supporting state of the glass tube and the advancing/retracting rod, FIG. 4 is a partially cutaway right side view of the grip rotating part in this invention, FIG. This is a cross-sectional view of the enlarged line ■-■ in Figure 4. DESCRIPTION OF SYMBOLS 1... Glass tube, 4... Processed end part, 5... Outer glass tube, 7... Open end part, 8... Inner glass tube, 1
6... Support part, 18... Bearing part, 22... Support part, 23... Advance/retreat rod, 27... Heating part, 28... Spatula part, 29... Gripping rotation part No. 2 Figure 21 Figure 5 Indication of procedural amendment case 1982 Patent Application No. 217494 2 Title of invention A device for sealing the open end of double stacked glass tubes a Relationship with the amended case Patent Applicant's specification: Scope of claims: Detailed explanation of the invention: (1) The entire specification will be corrected in the attached document. (2) Figure 3 will be corrected in the attached document. Description Name of the Invention Apparatus 2 for sealing open ends of double stacked glass tubes 2 A device for sealing open ends of double stacked glass tubes provided in the claims. a Detailed Description of the Invention The present invention provides a pair of open ends of double stacked glass tubes that automatically seals the open ends of an outer glass tube and an inner glass tube that are fitted together to form a double layer. Regarding equipment. Vacuum double glass solar heat collection tubes, which are known for their high heat collection efficiency, are made by laminating a transparent outer glass tube and an inner glass tube with a selective absorption film deposited on its outer surface. However, due to the highly technical problem of creating a vacuum in the space between the inner and outer glass tubes, many use metal tubes for the inner tubes. However, if the inner and outer tubes are made of different materials, it becomes difficult to maintain a permanent vacuum, so solar collector tubes with the inner and outer tubes made of homogeneous glass have become dominant. Therefore, there has been a desire in the art to develop an apparatus for efficiently and completely sealing double stacked inner and outer glass tubes. This invention was invented with the aim of meeting the above-mentioned demands in the industry, and includes a bearing portion that actively rotates the inner and outer glass tubes that are fitted together to form a double layer. A retractable rod that enters and rotates integrally with the glass tube is provided separately from the bearing portion of the outer glass tube, and a heating portion that heats and melts the space between the inner and outer glass tubes is provided at the open end of the outer glass tube, and a softening rod is provided at the open end of the outer glass tube. The gist of the structure is that a spatula part is provided to abut the open ends of the inner and outer glass tubes. Explain in detail. In FIG. 1, l is a glass tube made by overlapping two glass tubes 5 and 8 of approximately equal length but different diameters, of which the outer glass tube 5 has a bottom 2 at one end. , an exhaust pipe 3 is provided protruding from the axial center of the bottom part 2, and the other open end is used as the processed end part 4, and the inner glass tube 8 also has a bottom part 6 at one end, and has an open end part 4. The other end 7 is slightly expanded in the centrifugal direction. The outer glass tube 5 and the inner glass tube 8 thus formed are integrally supported in a concentric manner by an inner tube holder 9 attached to the outer peripheral surface of the bottom 6 of the inner glass tube 8. The tube holder 9 has three plate springs to support the inner and outer glass tubes 5 and 8 concentrically. 11j11 and a ring 15 to be fitted into the inner glass tube 8, the plate spring 11 is provided with a corrugated portion 1O that presses against the inner circumferential surface of the outer glass tube 5 and the outer circumferential surface of the inner glass tube 8. A predetermined distance 12e is maintained between the inner circumferential surface of the outer glass tube 5 and the outer circumferential surface of the inner glass tube 8, and the elastic force of the corrugated portion 10 prevents radial displacement between the outer glass tube 5 and the inner glass tube 80. I'm here. However, the strength of the elastic force of the corrugated portion 10 of the leaf spring 11 does not hinder the insertion of the inner glass tube 8 into the outer glass tube 5, but It has sufficient strength to rotate together with the glass tube 8 in the circumferential direction. 53 is each corrugated portion l of each leaf spring 11
Rounded protrusions are provided on the tops of the O's, and the protrusions 13 are brought into contact with the inner circumferential surface of the outer glass tube 5.
In particular, frictional forces are reduced when inserting the inner glass tube 8 into the outer glass tube 9. 14 is a getter metal supported by the tip hook portion of each leaf spring ii. 56 is a bearing part that rotatably supports the bottom part 2 of the outer glass tube 5;
7 and a bearing 18 of this support 17. The support body 17 is made of a self-lubricating resin such as Teflon resin, and has a recess 19 that frictionally engages with the bottom 2 of the outer glass tube 5 and a recess 19 that frictionally engages with the bottom 2 of the outer glass tube 5.
It has a through hole 20 into which the exhaust pipe 3 protrudes from, and 21 is a frame body of the bearing portion 16. Reference numeral 22 denotes an inner tube support portion that enters into the open end 7 of the inner glass tube 8 and supports the inner tube, and is inserted into the open end 7 of the inner glass tube 8 to a predetermined position (a position that is not heated). It is provided with an advancing/retracting rod 23 into which the tip enters, and an air cylinder 24 that causes the advancing/retracting rod 23f to move forward and backward. Reference numeral 25 denotes a head at the tip of the advancing/retracting rod 23 that enters into the open end 7 of the inner glass tube 8; In the portion 25, leaf springs 26 which come into contact with the inner circumferential surface of the inner glass tube 8 are mounted at four positions at equal intervals in the circumferential direction and in two rows in the longitudinal direction. A heating section 27 heats the open end of the glass tube 1 from the outer peripheral direction of the outer glass tube 5, and a Hakasu burner is used in this embodiment. Reference numeral 28 denotes a spatula portion that guides the processed end portion 4 of the outer glass tube 5 that has been softened by the heating action of the heating unit 27 inward, and the spatula portion 28 is brought into contact with the processed end portion 4 of the outer glass tube 5 that has been softened. , further directed towards the open end 7 of the inner glass tube 8,
It is configured so that it can be joined to the flared open end 7 of the inner glass tube 8 which has also been softened, and the processed end 4 of the outer glass tube 5 and the open end 7 of the inner glass tube 8 can be sealed. has been done. Reference numeral 29 denotes a gripping/rotating portion that circumscribes and grips the outer circumferential surface of the outer glass tube 5 and rotates the inner glass tube 8 together with the glass tube 5, and is configured as follows. Reference numeral 30 denotes a substrate of the gripping and rotating portion 29 fixed to the support 35, and the substrate 30 has an insertion hole 32 into which the glass tube 1'5, in which the outer glass tube 5 and the inner glass tube 8 are stacked, is inserted from above. It is formed. Three roller support rods 33 are provided on one side of the substrate 30 so as to be movable in a centrifugal direction, and are provided radially with respect to the center point of the insertion hole 32. These three roller support rods 3
3 are individually fitted into holes 36 and 37 drilled in each of the double brackets 34 and 35 formed on one side of the substrate 30, and each roller support rod 33 has a A spring 39 is provided between the respective flanges 38 and the inner bracket 34 to bias the roller support rods 33 individually in the centrifugal direction. Reference numeral 40 denotes a frame body integrally provided at the end of each roller support rod 33 in the centripetal direction, and rollers 41e circumscribing the outer surface of the outer glass tube 5 are individually and rotatably supported inside the frame body. -42 is a gap provided between the roller support rod 33 and the substrate 30 so as to rotate around its axis. One of the rollers 41 supported by the centripetal end of each roller support rod 33 is a drive roller 41a, and one end of the rotation shaft 43 of the drive roller 41a is connected to the substrate. 30, and a boot provided on this extension part +) -44 and a reversible part provided on the outside of the board 30. reversible motor 4
6, the drive roller 41a rotates actively. 48 is a needle bearing that receives the rotating shaft 43, and 49 is an escape groove of the pulley shaft 43 that moves with the movement of the drive roller 41a in the centrifugal direction. Further, 50 is a needle bearing provided in the frame 40 of each roller support rod 33 to allow the other two rollers 41 and 41 to rotate freely, and 51 is a support shaft of the roller 41 as well. 52 is a tapered cam for gripping and operating the glass tube 5, and is formed by forming a tapered cam groove 54 in a centripetal direction on a cam plate 53 which is provided on one side of the substrate 30 so as to be rotatable forward and backward in the circumferential direction. , the dome-shaped head of each roller support rod 33 is brought into contact with each tapered cam groove 54 by the elastic force of a spring 39 provided on the rod, and this tapered cam 52 is brought into contact with a spring 390. When acting against the elastic force, each roller support rod 33 is pressed in the centripetal direction,
The rollers 41 of each roller support rod 33 grip the glass tube 5 from the outside. A ring 55 rotatably supports the cam plate 53, and is fixed to the base plate 30 with bolts 56. 57 is an air cylinder for operating the taper cam 52, and the tip of the piston rod 58 of the cylinder is connected to the cam plate 5 of the taper cam 52 via a connecting rod 59.
3, so that the taper cam 52 can be rotated in the circumferential direction forward and backward by a required angle by the forward and backward movement of the piston rod 58. Reference numeral 60 indicates a moving hole for the connecting rod 59 formed in the substrate 30. Reference numeral 61 denotes a base to which the bearing portion 16 of the glass tube 1, the gripping rotation portion 29 of the intermediate tube 1, the spatula portion 28, etc. are attached. Next, the operation of the present invention will be explained based on the above embodiments. An insertion hole formed in the base plate 30 of the grip rotation unit 29 allows an integrated glass tube 1 of the outer glass tube 5 and the inner glass tube 8 which are overlapped with each other via the inner tube holder 9 fitted to the bottom 6 of the inner glass tube 8. 32 from above, and connect the bottom part 2 of the outer glass tube 5 and the exhaust pipe 3. Engage with the support body 17 of the bearing part 16. Next, the air cylinder 24 is actuated to advance the advancing/retracting rod 23 toward the inner glass tube 8 of the glass tube 1 (leftward in FIG. 1), and the head 25 at the tip of the advancing/retracting rod 23 is moved into the heating section It enters into the inner glass tube 8 at a position where it is not subjected to the heating effect by the tube 27. Next, the air cylinder IJ provided on the substrate 3o of the grip rotation unit 29
When the piston rod 58 is operated, the piston rod 58 is moved backward, and the taper cam 52 connected to the tip of the rod 58 is rotated counterclockwise in FIG.
The rollers 41a, 4, which are supported by each roller support rod 33, press the dome-shaped head of the support rod 23 against the elastic force of the spring 39.
1. 41 in the centripetal direction to grip the glass tube l outward. After the glass tube l is gripped by the rollers 41aj41, 41 in this manner, the reversible motor 46 is started to rotate the drive roller 41ai. The rotation of this drive roller 41a, each roller 418, 41.41
The glass tube l held by the rollers 41 rotates, and at this time, each roller 41 applies a thrust force to the glass tube l in the direction of the support part 56 during rotation, and presses the inner tube l in the direction of the support part 56. , the inner and outer glass tubes 5 and 8 are rotated together at a predetermined position. Next, when the heating section 27 is ignited, the open end of the rotating glass tube l is heated, and the end 4 of the inner and outer glass tubes 5 is heated.
, 7 gradually become softened, and in this state, the spatula 28 is advanced toward the glass tube 1, and is pressed against the processed end 4 of the outer glass tube 5 in the centripetal direction, thereby softening the inner tube 5. The end portion is joined to the open end portion 7 of the inner glass tube 8, and the processed end portion 4 of the outer glass tube 5 and the open end portion 7 of the inner glass tube 8 are melt-sealed. In this way, the sealing work of the open end of the glass tube l is completed, but after the work is completed, the spatula part 28 is moved back and the action of the heating part 27 is also stopped, and then the reversible motor 46 is stopped. to stop the rotation of the glass tube l. Finally, the piston rod 58 is returned to its original position and the cam plate 53 is rotated clockwise in FIG. Each roller 41a, 41.41 is moved back together with the roller support rod 33 to separate from the outer surface of the glass tube l, thereby releasing the glass tube l. Next, the air cylinder 24 of the inner tube support section 22 is actuated to move the advancing/retracting rod 23 backward (move to the right in FIG. 1), and the head 25 of the advancing/retracting rod 23 escapes from inside the inner glass tube 8. The glass tube l that has been sealed can be removed from the bearing part 16 and the gripping rotation part 29. The present invention has been described above based on the embodiments, but the present invention is provided with a bearing portion that actively rotates the inner and outer glass tubes that are fitted into a double layer. A retractable rod that rotates together with the glass tube is provided separately from the bearing part of the outer glass tube, and a heating part that heats and melts the rotating part is provided at the open end of the inner and outer glass tubes, and a softened inner and outer glass tube. Since a spatula is provided to abut the open ends of the glass tubes against each other, the double stacked inner and outer glass tubes rotate together at a relative speed of O, making the sealing process easy and reliable. be able to. Also,
Since the sealing work is carried out mechanically, the same work can be repeated for each work to achieve uniform work, thereby improving work safety and work efficiency. 4. Brief description of the drawings The drawings show one embodiment of the present invention; Fig. 1 is a front view, Fig. 2 is an enlarged cross-sectional view showing the glass tube bearing portion of l along with the bottom of the glass tube; Fig. 3 is an enlarged sectional view showing the retractable rod with the tip head inserted into the open end of the inner glass tube together with the glass tube, Fig. 4 is a partially cutaway front view of the other bearing part, and Fig. 5 is Similarly, FIG. 6 is a rear view and an enlarged sectional view taken along the line Vl--Vl in FIG. 4. l...Glass tube 4...Processed end 5...Outer glass tube 7...Open end 8...Inner glass tube
16... Bearing part 22... Inner tube support part 23.
・・Advancing/retracting rod 25 ・・Advancing/retracting rod head 27 ・・Heating part 28 ・・Spatula part 29 ・・Bearing part Patent applicant Nitto Kohki Co., Ltd. Figure 5

Claims (1)

[Claims] A support part provided with a bearing part that rotatably supports the unprocessed end of the double stacked glass tubes, and a support part provided with a bearing part that rotatably supports the unprocessed end of the double stacked glass tube, and a support part that enters into an inner glass tube that opens at the processed end of the glass tube to freely rotate the glass tube. a heating section that heats the processed end of the glass tube from the direction of the outer periphery of the outer glass tube; an open end of a double stacked glass tube, characterized by comprising a spatula part that guides the outer glass tube, and a grip rotation part that circumscribes and grips the outer peripheral surface of the outer glass tube and rotates the glass tube. Part sealing device.