JPS6238287B2 - - Google Patents

Description

[Detailed Description of the Invention] In today's world where energy conservation is being called for,
Various solar heat collectors that utilize solar heat are widely used for hot water supply, air conditioning, and heating.

This solar heat collector has the highest heat collection efficiency when it uses a vacuum double glass tube type heat collector, but this vacuum double type heat collector tube has a transparent glass outer tube,
It has a structure in which a glass inner tube whose outer surface is covered with a selective absorption film having high heat collecting properties is fitted concentrically, and when manufacturing such a vacuum double tube type heat collecting tube, the outer tube and the open end of the inner tube shall be joined in an airtight manner. This joining requires a great deal of skill as it requires a perfect sealing technique. Moreover, manual work is not only inefficient, but also causes the inconvenience that the shape of the joint is inconsistent.

In view of the above-mentioned inconveniences that occur in the process of joining the inner and outer glass tubes constituting the solar heat collector tube, the present invention facilitates flaring of one open end of the straight glass tube serving as the inner tube, and This relates to a flaring device for the opening end of a glass tube, which aims to make it easy to make the flare shape uniform and to make the tube dimensions constant. It is characterized by automatically expanding the portion outward and applying a thrust force in the direction of the unprocessed opening end to regularize the flare shape.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

In the drawing, 1 is a supply/discharge mechanism that raises and lowers a glass straight tube 3 having openings at both ends by raising and lowering an elevating body 2, and discharges the glass straight tube 3 after processing. Three receiving portions 4 are provided. 5 is a first reversible motor that raises and lowers the elevating body 2.

Reference numeral 6 denotes a mounting table on which the unprocessed straight glass tube 3 is placed, and is inclined slightly downward in the direction of the elevating body 2. 7 is a pedestal for storing the glass straight pipe 3 after processing;
It is provided with a distance between it and the mounting table 6 that is enough for the elevating body 2 to move up and down, and is slightly inclined in the same direction as the table 6.

Reference numeral 8 denotes a lever-shaped straight glass tube 3 holder that is protruded from the tip of the pedestal 7 toward the gap between the pedestal 7 and the above-mentioned mounting pedestal 6, and is pivoted and tilted in the same direction as the pedestal 7. ,
The free end of this receiver 8 is connected to the rising straight glass pipe 3
When pushed from below, the straight glass tube 3 rotates upward, and when the straight glass tube 3 rises further and is released from the pushing force, it is pivoted so that it returns to its original state (the state shown in FIG. 1).

Reference numeral 9 denotes a support portion for the unprocessed open end of the straight glass tube 3, and a reciprocating rod 10 that moves forward and backward with respect to the open end of the straight glass tube 3 that has been raised to a predetermined height by the straight glass tube supply/discharge mechanism 1; , a truncated conical support arm 11 rotatably provided at the tip of the retractable rod 10, and a second reversible motor 12 for moving the retractable rod 10 forward and backward a predetermined distance. 13 is a truncated conical surface of the support arm 11 that enters the opening of the straight glass tube 3, and 14 is a flange plate formed at the bottom of the support arm 11 and abutting the open end of the straight glass tube 3.

In FIG. 3, reference numeral 15 denotes a flaring section that expands the opening end of the straight glass tube 3 to be processed outward, and the flaring section 15 expands the opening end of the straight glass tube 3 to be processed. Flare lever 1 to enter and exit
It has 6. This flare lever 16
As shown in the figure, it is provided on a movable disk 18 that moves forward and backward in the axial direction of the glass straight tube 3 by a third reversible motor 17, facing a support portion 9 that rotatably supports one open end of the glass straight tube 3. A fourth reversible motor 19 provided on the movable disk 18 rotates the movable disk 18 in the horizontal direction. Reference numeral 20 denotes a reciprocating rod which is moved forward and backward by a second reversible motor 17 and a rack and pinion mechanism (not shown), and is connected to the movable disk 18.

Reference numeral 21 denotes a heating section which heats the opening end of the glass straight pipe 3 to be processed to a high temperature to soften the opening end. In this embodiment, a gas burner is used.

In FIG. 1, reference numeral 22 denotes a gripping/rotating portion for the glass straight tube 3, which is provided in the vicinity of the flare processing portion 5 for widening the opening end of the glass straight tube 3 to be processed, and the same portion is shown in FIG. arranged circumferentially, and
It has three rollers 23 that move forward and backward in the centripetal direction,
Each of the rollers 23 holds the straight glass tube 3 horizontally and rotates it. The base plate 24 of the gripping and rotating portion 22 has a downward opening groove 25 for introducing the straight glass tube 3 supplied by the supply/discharge mechanism 1, and the substrate 24 has a downward opening groove 25 for introducing the straight glass tube 3 supplied by the supply/discharge mechanism 1. Around the rollers 23, 23,
23 is slidable in the centrifugal direction within the substrate 24,
In addition, they are individually supported by three support rods 26 which are arranged at equal intervals and rotatable about a radial line passing through the center line of the straight glass tube.

In FIG. 6, reference numerals 27 and 28 are brackets formed on one side of the substrate 24, and are for supporting the support rod 26 so as to be able to move forward and backward in the centrifugal direction. 29 is a spring that presses against the tapered cam groove 30 described below that presses each support rod 26 in the centripetal direction;
1 is a substrate 2 which is rotatable in the circumferential direction at a predetermined angle forward and backward;
A tapered cam groove 3 formed on the inner circumferential surface of the cam plate 31.
The dome-shaped heads provided at the tips of the support rods 26 are brought into contact with the cam plates 31 and 4.
When rotated to the left in the figure and positioned in the state shown in the figure, each roller 23 advances in the centripetal direction via each support rod 26, so that the glass straight pipe 3 can be gripped from the outside. It's summery.

In FIG. 6, 32 is an air cylinder, and the tip of the piston rod 33 is connected to the cam plate 31.
The cam plate 31 is connected to the outer peripheral edge of the piston rod 33, and the cam plate 31 is configured to rotate by a predetermined angle in the circumferential direction by the reciprocating movement of the piston rod 33. Reference numeral 34 denotes a long hole formed in the side surface of the base plate 24, into which a connecting pin 35 connecting the cam plate 31 and the piston rod 33 is movably inserted.

36 is one 23 of the three rollers 23
a fifth reversible motor for rotating a, 37
is a rotation shaft that supports the roller 23a in a state perpendicular to the support rod 26, and is provided in a frame 38 provided at the centripetal side end of the support rod 26, and this rotation shaft 3
7 and a pulley 41 provided on the rotating shaft of the fifth reversible motor 36.
The timing belt 40 suspended between the two rollers 23a actively moves the remaining two rollers 2
3 and 23 are driven to rotate at a constant speed. 42 is a needle bearing that receives the rotating shaft 37; 43 is the rotating shaft 3 formed on the substrate 24;
7 is the insertion groove. In addition, the other two rollers 2
3 and 23 are frames 38 and 3 respectively provided at the centripetal end of the support rod 26 so that both can rotate freely.
A rotating shaft 4 provided perpendicularly to the support rod 26 within the
It is rotatably supported by 4 and 44. 45
is a needle bearing interposed between the rotating shaft 44 and the rollers 23, 23, 46 is a support rod 26,
This is a small gap formed between each frame body 38 and the substrate 24 to allow rotation of each frame body 38.

Reference numeral 47 denotes a feeding/discharging mechanism 1 for the glass straight pipe 3, a support part 9 at the unprocessed open end of the glass straight pipe 3, a flared part 15 at the processed open end of the glass straight pipe 3, and a grip for the glass straight pipe 3. This is a base to which the rotating part 22 is attached.

Next, the operation of the above embodiment will be explained.

When the elevating body 2 of the supply/discharge mechanism 1 for the glass straight tube 3 is in the lowered position, the receiving part 4 for the glass straight tube 3 provided at the top of the elevating body 2 becomes a mounting table on which the unprocessed straight glass tube 3 is placed. Among the glass straight tubes 3 placed on the mounting table 6 so as to form the same surface as the glass straight tube 6 , one glass straight tube 3 in the front row is placed on the receiving part 4 . The receiving part 4 on which the glass straight pipe 3 is placed is the first reversible motor 5
When the straight glass tube 3 rises together with the elevating body 2 by the drive of and reaches the centripetal position of the three rollers 23a, 23, 23. The other open end reaches the same height as the tip support arm 11 of the retractable rod 10 of the support section 9.

Next, the second reversible motor 12 is driven to move the advancing/retracting rod 10 of the support part 9 slightly forward (the first
When the support arm 11 is moved to the left (in the figure), the truncated conical surface 13 of the support arm 11 provided at the tip of the retractable rod 10 enters into the unprocessed open end of the straight glass tube 3.

Next, when the gripping rotation part 22 of the glass straight tube 3 is started and the air cylinder 32 provided on the base plate 24 is activated, the piston rod 33 is moved backward, and the cam plate 31 connected to the tip of the piston rod 33 is moved back. rotates counterclockwise as shown in Figure 4.
Tapered cam groove 3 formed in each cam plate 31
The support rods 26 whose dome-shaped heads are in contact with the support rods 26 are pressed in the centripetal direction against the elastic force of the springs 29, and are supported by frames 38 provided on each support rod 26. The rollers 23a, 23, and 23 each advance to grip a part of the outer periphery of the straight glass tube 3, which has one open end positioned in the open groove 25, from the outside.

When the straight glass tube 3 is gripped by the rollers 23a, 23, 23 in this way, the fifth reversible motor 36 is driven to rotate the roller 23a, and the friction of the rollers 23a, 23, 23 moves the straight glass tube 3 into a predetermined position. direction.

When the glass straight tube 3 starts rotating in this way, on the one hand, the rollers 23a, 23, 23 are rotatable around the respective support rods 26 that support it, and on the other hand, the tip of the retractable rod 10 of the support section 9 The other open end of the glass straight tube 3 is supported in an unstable state by the truncated conical surface 13 of
The sides are slightly downward, and the straight glass tube 3 is slightly inclined as a whole.
Each roller 23a, 23, 23 rotates around the support rod 26 in a direction that applies a thrust force to the support portion 9 side with respect to the glass straight pipe 3, and
3a, 23, 23 press the unprocessed open end of the glass straight pipe 3 against the collar body 14 of the retractable rod 10, align the axial center line of the glass straight pipe 3 with the axial center line of the retractable rod 10, and as a result , the straight glass tube 3 is held in a horizontal state, and the opening end to be processed is held in an optimal position relative to the heating section 21 described below.

Next, the heating section 21 is ignited to heat the opening end of the rotating straight glass tube 3 to be processed.

The action of the heating unit 21 first starts with preheating the open end of the straight glass tube 3. When the preheating is finished, the third reversible motor 17 is activated to move the movable disk 18 in the direction of the straight glass tube 3 (the first (to the right in the drawings and FIG. 3), and the tip of the flare lever 16 enters the opening end of the straight glass tube 3 to be processed (see FIG. 7A). Meanwhile, heating section 2
When the opening end of the straight glass tube 3 is softened, the fourth reversible motor 19 is activated to horizontally rotate the flare lever 16. . Due to this rotation of the flare lever 16, a part of the flare lever 16 comes into contact with the opening end to be processed of the rotating straight glass tube 3 from the inner wall side (see FIG. 7B), and the opening end to be processed Flare processing is performed by pushing outward and widening the periphery of the opening end to be processed.

After the opening end of the glass straight pipe 3 to be processed is expanded outward in this way, on the one hand, the heating by the heating unit 21 is stopped, and on the other hand, the flare lever 16 is rotated to its original position, and the flare lever 16 is opened to the glass. Straight pipe 3
Then, the movable disk 18 is moved backward to allow the flare lever 16 to escape from the straight glass tube 3, thereby completing the flaring process.

The processed straight glass tube is discharged as follows.

First, the drive of the fifth reversible motor 36 is stopped, the rotation of the rollers 23a is stopped, and the straight glass tube 3 is made stationary. Next, the piston rod 33 is moved back to rotate the cam plate 31 in the clockwise direction in FIG.
The action of the cam plate 31 on the support rod 26 supporting the support rod 23 is released, and the elastic force of the spring 29 of each support rod 26 causes each support rod 2
6 is moved back together with the rollers 23a, 23, 23 to separate the rollers 23a, 23, 23 from the straight glass tube 3, thereby releasing the straight glass tube 3 from the grip of the rollers. At this time, on the other hand, the advancing/retracting rod 10 of the support part 9 supporting the unprocessed open end of the glass straight pipe 3 moves backward (moves to the right in FIG. 1).
The unprocessed open end of the straight glass tube 3 is also released.

The glass straight pipe released in this way is then lowered by the elevating body 2 of the supply/discharge mechanism 1, which is activated.
It moves onto the receiving part 4 of the glass straight pipe 3 provided at the top of the elevating body 2 and descends, but in the middle of its descent, it transfers onto the receiving part 8 of the glass straight pipe 3 and is delivered to the receiving table 7 as it is. The elevating body 2 continues to descend, and when the receiving part 4 reaches the same height as the mounting table 6, the receiving part 4 touches the unprocessed straight glass pipe 3 placed on the mounting table 6.
Then, the above machining operation is started again, and this operation is repeated thereafter.

Although this invention has been explained above based on examples,
This invention includes a support part that moves forward and backward with respect to one open end of a straight glass tube having openings on both sides and rotatably supports that end, and a support part that moves forward and backward with respect to the other open end, and , a flared part provided opposite to the support part, and a flare lever that enters into the opening end and slides outward to expand the end edge outward when the opening end is heated; A heating section for softening the processed portion of the tube and at least three rollers for gripping and rotating the glass straight tube and applying a thrust force in the direction of the support section are installed on the outer periphery of the glass straight tube using cams and springs. Since it is equipped with a rotating part for gripping the straight glass tube that is movable forward and backward in the centrifugal direction, it is possible to easily and uniformly flare the open end of the straight glass tube. Anyone can safely, reliably, and efficiently perform flaring processing without the need for experienced workers.

In addition, the position of the unprocessed open end of the glass straight pipe is regulated, and the processed open end of the glass straight pipe can be maintained at a constant position by applying a thrust force in the direction of the open end. This, in combination with the fact that the gripping/rotating portion of the straight glass tube is configured with at least rollers circumscribing the straight glass tube, allows the processed glass tube to be easily and reliably sized.

Note that this invention is applicable not only to solar heat collection tubes, but also to
Of course, it can also be used for flaring any other type of glass tube.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a front view showing the whole, FIG. 2 is an enlarged side view showing a supply/discharge mechanism for a straight glass tube, and FIG. 3 is a flaring diagram of a straight glass tube. FIG. 4 is an enlarged side view showing the processing section; FIG.
FIG. 5 is an enlarged front view, FIG. 6 is a sectional view taken along the line -- in FIG. 4, and FIGS. 7A and 7B are explanatory views showing the opening end of the straight glass tube. 3...Glass straight tube, 9...Supporting part, 15...Flare processing part, 16...Flare lever, 21...Heating part, 22
...Gripping rotation part, 23, 23a...Roller, 26...
Support rod, 29...spring, 31...cam plate.

Claims (1)

[Claims] 1. A support part that moves forward and backward toward one open end of a straight glass tube that has open ends on both sides and rotatably supports that end, and a support that moves forward and backward toward the other open end and that supports the said opening. A flaring processing section in which a flare lever is provided facing the support section and extends the end edge outwardly by entering into the section and sliding outward when the end section is heated, and processing of a glass straight pipe. A heating unit for softening the portion, and at least three rollers for gripping and rotating the straight glass pipe and applying a thrust force in the direction of the supporting part are mounted on the outer periphery of the straight glass pipe in a centrifugal direction using a cam and a spring. A flaring device for flaring an open end of a glass tube, comprising a rotating portion for gripping and rotating a straight glass tube that is movable forward and backward.