JPH0226909Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a pulling device for optical fiber wire.

[Prior art]

Taking over the optical fiber wire means, for example, the first
As shown in the figure, a wire rod 2 with a larger diameter is fed into the heater 1 from above the cylindrical heater 1, the wire rod 2 is heated and melted by the heater 1, and the lower part of the molten wire rod 2 is fed at a speed V ₁ faster than the upper part. By pulling at a speed of _V2 , a wire with a smaller diameter is obtained. However, if the relationship between speed V ₁ and speed V ₂ changes even slightly during this pick-up operation,
Approximately concentric knot portions 3 and constricted portions 4 are generated in the drawn wire 2. These problems often occur especially immediately after the start of work, and unless the wire rod 2 is properly devised to take off the lower part of the wire rod 2, the wire rod 2 cannot be taken off successfully thereafter. Particularly in optical fibers in which the refractive index is changed between the outer circumferential side and the inner circumferential side, if eccentricity occurs between the wire material before and after the wire is taken off, it is inevitable that a fatal deterioration in quality will occur.

[Disclosure of invention]

In view of the above-mentioned problems, the present invention is capable of always performing good pulling even if knots or constrictions occur in the wire, and eliminates the occurrence of eccentricity between the wire before and after the wire is pulled. The purpose is to provide a collection device.

In order to achieve the above object, the present invention provides first and second
a shaft, a second shaft, two first and second blocks slidably attached to the first shaft and the second shaft, respectively, and a plane including the center line of the second shaft and perpendicular to the first shaft. A pair of belt frames each having an elongated shape in the second axial direction are disposed at symmetrical positions with respect to the second axial plane. One of the two blocks is connected by an arm through a pin, respectively, to form two link mechanisms symmetrical about the second axis plane, and each belt frame is connected through a rotation axis at approximately the center thereof. and is rotatably held by the first block, furthermore, both belt frames are always elastically biased toward each other, and the belts provided on both belt frames hold the wire rod,
It is characterized in that the wire rod can be pulled in the second axis direction.

[An example of the idea]

The second diagram is a schematic front view of the withdrawal device according to the present invention.
In the figure, two cylindrical parts 6 that are slidably fitted to the vertical support pillars 5 are fixed to the support pillars 5 with bolts 7, and a board 8 is integrated with the cylindrical part 6 on the side. is fixed to. A take-off device main body 9 is integrally fixed to the substrate 8, and in the illustrated example, the lower part of the wire 2 (FIG. 1) is inserted in the direction of arrow _X1 .

FIG. 3 is a partially vertical front view showing details of the take-up device main body 9, and FIG. 4 is a cross-sectional view taken along the line "--" in FIG. In FIG. 3, both ends of a horizontal guide bar 10 (first shaft) are integrally fixed to the substrate 8 via bearings 11 and 12, and the bar 10 is slidable via a slide ball (not shown). Two first blocks 13 and 14 are fitted together so as to be movable. On the first blocks 13 and 14, rotating shafts 15 and 16, which protrude toward the front in FIG. The parts are fitted together so that they can move freely on the same plane. At the rear of both first blocks 13 and 14, an air cylinder 19 is installed parallel to the horizontal guide bar 10.
The first block 13 is fixed to the rod tip 20 of the cylinder 19, and the first block 14 is connected to the rear end 21 of the cylinder via a pin 22 to supply pressurized air to the air cylinder 19. By feeding both belt frames 1
7 and 18 are always elastically biased in a direction toward each other.

Between the belt frames 17 and 18 and the bar 1
A vertical guide bar 23 (second shaft) is disposed between the cylinder 19 and the cylinder 19, and its upper and lower ends are fixed to the substrate 8 via bearings 24 and 25. Since the take-up device body 9 is approximately symmetrical about a plane (second axis plane) that includes the center line of the bar 23 and is perpendicular to the bar 10, the right half of the bar 23 in FIG. 3 will be explained next. do.

Two second blocks 26 and 27 are slidably fitted into the bar 23. As is clear from FIG. 4, a pin 28 parallel to the rotation axis 16 protrudes forward (to the left in FIG. 4) from the upper second block 26.
The upper end of the arm 29 is rotatably fitted via a bearing 30. On the other hand, the belt frame 18 is rotatably fitted to the rotation shaft 16 via a bearing 31.
It mainly consists of frame plates 32 and 33 arranged parallel to each other at intervals in the front-rear direction. The rear end portion of a pin 34, which is supported by penetrating through the upper portions of both plates 32 and 33 in parallel with the rotation shaft 16, is fitted into the lower end portion of the arm 29 via a bearing 35 and is rotatably supported. ing. Further above the pin 34, a pulley 40 is formed by fixing an annular side slip prevention member 38 integrally with two gears 36 and 37 having external teeth using a clamping bolt 39.
The shaft 41 is rotatably supported via a bearing 42 on a shaft 41 parallel to the shaft 41, and moving blocks 43 and 44 are fitted to the front and rear ends of the shaft 41, respectively. Vertical tension bolts 45 and 46 penetrate downward through both blocks 43 and 44, respectively.
The lower ends of the plates 32, 33 are in contact with abutting members 49, 50 welded to the bottom surfaces of upwardly opening recesses 47, 48, respectively. Tension bolts 45, 46 are blocks 43, 44
It is screwed into nuts 51 and 52 fixed to the upper end surface, and by turning tension bolts 45 and 46, the vertical position of the pulley 40 can be changed, and the belt 7
3,73' tension can be adjusted.

Between the lower ends of the frame plates 32 and 33,
A pulley 57 is disposed, which is formed by two gears 53 and 54 having external teeth holding an annular lateral slip prevention member 55 and integrally fixed with a clamping bolt 56.
The shaft 58 to which the center of the pulley 57 is fitted is the bearing 5
It is rotatably supported via 9. Here, the pulley 57 and shaft 58 are adapted to rotate together by a key 57a. Axis 58 is rotation axis 1
6, and the rear portion thereof penetrates the plate 33 and is rotatably supported by the lower end of the arm 61 via a bearing 60. Therefore, each belt frame 1
8, 17 are two arms 29, 29', 61,
61' and the bar 23 (second axis) form two link mechanisms that are symmetrical about the second axis plane. A gear 62 with external teeth is fitted to the further rear of the shaft 58 and rotated together by a key 62a, and the rear end 63 is connected to a speed control motor 65 via a coupling 64.
It is connected to a drive shaft 66 of. The motor 65 is arranged behind the board 8 and is fixed to the rear end of a bracket 68 passing through a hole 67 in the board 8 by a bolt 69. Tip of bracket 68 (not shown)
is fixed to the frame plate 33, and the motor 65
is adapted to move integrally with the movement of the belt frame 18.

On the other hand, the second guide bar 23 is slidably fitted into the guide bar 23.
A shaft 70 parallel to the rotation shaft 16 is rotatably supported by the block 27 via a bearing 71, and the front end of the shaft 70 projects forward from the second block 27. A gear 72 that rotates integrally with the shaft 70 meshes with the gear 62, and the upper end 61a of the arm 61 is rotatably supported by the shaft 70 via a bearing (not shown).

Here, as mentioned above, the pulling device main body 9 is approximately symmetrical about a plane in the front-rear direction including the center line of the bar 23, and except for the coupling 64, the motor 65, and the bracket 68, as shown in FIG. Each component on the belt frame 18 side is located at a plane symmetrical position on the belt frame 17 side. In FIG. 3, corresponding members on the frame 17 side are indicated by the same number with a dash. gear 72
and gear 72' are meshed at the center, and arm 2
The arms 9 and 29' are in a position that separates from each other as they go downward, and the arms 61 and 61' are also in a figure eight-shaped relationship that opens downward. Pulley 40,5
Rubber belts 73 and 73' are placed between the rubber belts 73 and 73' and between the pulleys 40' and 57', respectively. A holding roll 7 rotatably supported on a central axis parallel to
Seven belts 4 and 74' are built into the belt frames 17 and 18, respectively. Furthermore, belt 7
3 and 73' have an annular groove 73a inside the center of the width in the longitudinal direction, and internal teeth that mesh with the gears 53 and 54 are formed on both sides of the groove (Fig. 4) to prevent lateral displacement. .

Furthermore, as is clear from FIG. 3, the rear end of a bracket 75 is fixed to the bearing 24 by a bolt 76, and two guide rolls 77 (in FIG. (only one guide bar shown) is on the same horizontal plane and the horizontal guide bar 10
are arranged parallel to each other and at a slight distance from each other,
It is rotatably supported by a bracket 75 via a shaft 78. As is clear from FIG. 4, the gap formed between both guide rolls 77 exists on a vertical line A through which the vertical center of the rubber belt 73 passes when viewed from the side.

Next, the operation will be explained. The lower end of the wire 2, which has been melted and drawn downward by the heater 1 shown in FIG. 1, is passed between the guide rolls 77 shown in FIG. 3 and held between the rubber belts 73, 73'. The clamping force is maintained at a predetermined constant value by feeding pressurized air at a predetermined constant pressure into the air cylinder 19. Both rubber belts 73 and 73' are indicated by arrows.
By rotating in _{the X 2 ,} This is obtained by the control motor 65. The torque of the motor 65 is transmitted to the rubber belt 73 via the drive shaft 66, the coupling 64, the shaft 58, and the pulley 57, as well as the gear 62 and the gear 7.
2 to the rubber belt 73' via the gear 72' shown in FIG. 3, etc., as a torque in the opposite direction. Note that the rotation speeds of both rubber belts 73, 73' are always the same.

When, for example, a knot 3 is formed on the wire 2 as shown in FIG. 1, the take-off device operates as follows. As shown in FIG. 5, first, the knot portion 3 of the wire rod 2 is held between the upper portions of both belts 73, 73', thereby opening both belt frames 17, 18 into an inverted figure-eight shape. At this time, as the second block 26 moves, the second block 26 slides downward on the guide bar 23 via the arms 29, 29' shown in FIG. Second
Since the block 26 cannot be moved in the left-right direction, both belt frames 17 and 18 are attached to the guide bar 2.
It opens symmetrically around 3. both belts 73,
The clamping force of 73' is constantly provided by the air cylinder 19. Since both rotation axes 15, 16 can move only in the horizontal direction, the belt frames 17,
Even if the gap between the upper portions of 18 is widened, no unreasonable force is generated in the direction of pinching the gap between the lower portions. Next, the 6th
When the joint portion 3 is in the position shown in the figure, both belt frames 17 and 18 are opened in a figure-eight shape. That is, the upper portions of both belt frames 17 and 18 return to the normal state from the abnormally open state, while the lower portions are abnormally opened by the joint portions 3. With this movement, the second block 26 of FIG. 3 slides upwardly on the guide bar 23 and returns to its normal position, while the second block 27 is lowered downwardly via the arms 61, 61'. At this time, both second blocks 26 and 27 are connected to the guide bar 23.
It is possible to move only in the vertical direction by
Both belt frames 17 and 18 are always in symmetrical positions with the guide bar 23 as the center.

In addition, as shown in FIG. 4, a driving motor 65
is attached to the frame plate 33 via the bracket 68.
Since the gears 72 and 72' are fixed to the belt frames 17 and 18 and move together with the belt frames 17 and 18, the meshing position of the gears 72 and 72' shown in FIG. Even if the rotation speed changes, the rotation transmitted to the rubber belt 73' does not change, and both belts 73, 73' always maintain the same rotation speed.

〔effect〕

Since the take-off device according to the present invention has the above-described configuration, the belt frame can rotate around the rotation shafts 15 and 16 and at the same time move as a whole in the direction of the first shaft 10, and the wire rod 2 Even if knots or constrictions occur in the wire, the contact area between the wire and the belt can be increased, so that good pulling can always be achieved with a large pulling force. In addition, since the belt frame always moves symmetrically around the second axis 23, eccentricity that occurs when the wire rod is pulled to one side after being taken off does not occur at all. It is possible to reliably prevent quality deterioration due to distortion.

[Another example]

If the two pulling devices shown in FIGS. 3 and 4 are arranged at positions that intersect at right angles when viewed from above, eccentricity of the wire rod 2 can be prevented in all directions. Further, the direction of pulling by the pulling device is not limited to the top to bottom direction; for example, if the belt frames 17 and 18 are arranged horizontally, horizontal pulling can be performed. Instead of the air cylinder 19, the belt frames 17 and 18 may be biased by hydraulic pressure, a spring, or the like.

[Brief explanation of the drawing]

Fig. 1 is a schematic vertical cross-sectional side view of the cylindrical heater section, Fig. 2 is a schematic front view of the take-up device according to the present invention, and Fig. 3
The figure is a partially vertical front view of the main body of the take-up device, FIG. 4 is a cross-sectional view taken from the side shown in FIG. 3, and FIGS. 5 and 6 are schematic front views showing different operating states. 2... Wire rod, 10... Guide bar (first axis),
13, 14...First block, 15, 16... Rotating shaft, 17, 18... Belt frame, 23...
Guide bar (second axis), 26, 27...Second block, 28, 34, 34'...Pin, 58, 5
8', 70... shaft (pin), 73, 73'... belt.

Claims (1)

[Scope of utility model registration request] a first axis and a second axis fixed to the substrate in a state that is orthogonal to each other but not in contact with each other, and the first axis and the second axis
Two first and second blocks are each slidably attached to the shaft, and are positioned symmetrically about a plane (second axis plane) that includes the center line of the second axis and is perpendicular to the first axis. A pair of belt frames each having an elongated shape in the second axial direction are provided, and each belt frame is connected to one of its longitudinal ends and one of the second blocks by an arm via a pin. to form two link mechanisms symmetrical about the second axis plane, and each belt frame is rotatably held by the first block via a rotation shaft at a substantially central portion thereof, Furthermore, both belt frames are always elastically biased in a direction toward each other, and the wire rod is held between the belts provided on both belt frames so that the wire rod can be taken in the second axis direction. Optical fiber wire pulling device.