JP2722619B2 - Screening equipment for linear objects - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear object screening apparatus for removing a low-strength portion of a linear object such as an optical fiber.

<Prior art> In general, in order to manufacture an optical fiber, an optical fiber is drawn from an optical fiber preform, coated, coated, then inspected for tensile strength, etc., and wound by a winding machine, A drawing machine as shown in FIG. 3 is used. This wire drawing machine
10 is a drawing furnace 12 for drawing an optical fiber preform 11, and an outer diameter measuring device 14 for measuring the outer diameter of the drawn optical fiber 13.
And a coating portion 16 comprising a die 15a for coating and a curing furnace 15b on the outer periphery of the optical fiber 13, first and second capstan wheels 17, 18 for measuring the tensile strength of the optical fiber 13, and first and second
The apparatus includes a screening device 22 including second capstan belts 19 and 20 and a load roller 21, and a winder 23 that winds the optical fiber 13.

Here, the first and second capstan wheels 17, 18 of the screening device 22 for inspecting the tensile strength of the optical fiber 13 are described.
Are individually driven by drive sources (not shown).

<Problem to be Solved by the Invention> However, the conventional screening device 22 has the following problems.
A first capstan portion A including a capstan wheel 17 and a second capstan belt 19 and a second capstan portion B including a second capstan wheel 18 and a second capstan belt 20 are provided on a work surface. On the other hand, since the devices are arranged side by side, there is a problem that the device becomes long and as a result, a large work space must be secured.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a linear object screening apparatus which makes a work space compact and facilitates a work of applying a linear object such as an optical fiber.

<Means for Solving the Problems> To achieve the above object, the configuration of the linear object screening apparatus of the present invention comprises a first capstan wheel and a second cap on which the individually driven and driven linear objects are wound. The capstan section consisting of a stan wheel and these first and
A capstan belt portion having first and second capstan belts abutting on a second capstan wheel;
A screening device for a linear body for removing a low-strength portion of the linear body, comprising a screening tension applying dancer roll hanging down by the linear body stretched between the capstan wheels. A stun shaft is provided on the same axis, and the first and second capstan wheels are rotatable independently of each other.

<Operation> In the linear object screening apparatus having the above-described configuration, when the initial linear object is hung, the linear object is first wound around the first capstan wheel, and then the linear object is placed on the lower side in the vertical direction. And wound around the screening tension applying dancer roll, and then again vertically upward, and wound around the second capstan wheel on the same axis as the first capstan wheel.

Thereafter, the capstan belt portion having the first and second capstan belts is pulled down, and each of the first and second capstan belts is brought into contact with the first and second capstan wheels.

<Embodiment> Hereinafter, a preferred embodiment of the linear object screening apparatus of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic view of a screening apparatus according to the present embodiment, and FIG. 2 is a cross-sectional view of a main part thereof. As shown in these drawings, the screening apparatus 100 comprises a first capstan wheel 102 around which an optical fiber 101, which is a linear body to be conveyed, is wound and pulled, and is independently rotated on the same axis as the first capstan wheel. A capstan portion 104 comprising a free second capstan wheel 103; a screening tension applying dancer roll 105 suspended by the optical fiber 101; and a first and second capstan wheel 10
2, and a capstan belt portion 108 having first and second capstan belts 106 and 107 for abutting and providing tension.

As shown in FIG. 2, the capstan portion 104 includes a hollow first capstan wheel provided with a first capstan wheel 102 at one end.
A first capstan drive pulley 111 is provided at the other end of the capstan shaft 110, and the hollow first capstan shaft 110 is rotatably supported on the base side via bearings 112 and 113. Further, the inside of both ends of the hollow shaft 110 is connected to the second capstan shaft 1 via bearings 114 and 115.
A second capstan wheel 103 and a second capstan driving pulley 117 are fixedly provided at both ends of the second capstan shaft 116, respectively. And the above
The first and second capstan drive pulleys 111 and 117 are independently driven to rotate by a drive source such as a motor (not shown) to drive the hollow first and second capstan shafts 110 and 116 so that they can rotate independently of each other. .

Thus, despite the fact that the first capstan wheel 102 and the second capstan wheel 103 are on the same axis, they are driven and rotated by separate drive sources, and the work space is sufficient for the conventional capstan set. Become compact.

On the other hand, the capstan belt section 108 can be moved up and down by an air cylinder 121 so that the optical fiber 101 can be easily hooked on the first capstan wheel 102 provided on the same axis. In addition, the capstan belt section 108 includes
A belt tensioning mechanism is provided to prevent the first and second capstan belts 106 and 107 from hanging down when they come into contact with the 1,2 capstan wheels 102 and 103 and when they are lifted.

As shown in FIG. 1, the belt tensioning mechanism includes a base 122 which moves up and down by an air cylinder 121 and rollers 123a, 123b, 123 around which the first capstan belt 106 is wound.
c, and rollers 124a, 124b, and 124c around which the second capstan belt 107 is wound.
The b and the rollers 124a and 124b are rotatably supported on the base 122 via pins 125. Roller 123c and roller 12
4c is rotatably provided at one end of L-shaped capstan belt tensioning levers 127, 128 which are rotatably supported by pins 126 and are provided opposite each other. A spring 129 is fixed to the other end of each of the levers 127 and 128, and these levers 127 and 128 are pulled from each other. Therefore, the first capstan belt 106 wound around the rollers 123a, 123b, 123c and the rollers 124a, 124
The second capstan belt 107 wound around b and 124c is independently tensioned by a tension spring 129. Also, levers 127 and 128 are extended by tension springs 129.
, The tension of the first and second capstan belts 106 and 107 becomes equal.

As described above, in the linear object screening apparatus according to the present invention, the first capstan shaft is arranged on the same axis and is rotatable with respect to each other. Space is reduced.

Also, since the capstan belt part can be raised and lowered freely,
It becomes easy to wire the linear body on the first capstan wheel, which is on the back side of the second capstan wheel.

Furthermore, since the capstan belt portion is provided with a belt tensioning mechanism having a belt tensioning lever for holding the first and second capstan belts at a constant level, the tension springs pull each other in the direction in which the capstan belts are tensioned. The tension of both capstan belts becomes equal. Further, the adjustment of the belt tension can be performed in one place.

<Effects of the Invention> As described above in detail with the embodiment, the screening apparatus for a linear body of the present invention has an effect that the wire-laying operation can be easily performed, the apparatus can be made compact, and the working space can be made compact.

[Brief description of the drawings]

FIG. 1 is a perspective view of a screening apparatus according to one embodiment, and FIG.
The figure is a cross-sectional view of the main part, and FIG. 3 is a configuration diagram of the drawing machine. In the drawing, 100 is a screening device, 101 is an optical fiber, 102 is a first capstan wheel, 103 is a second capstan wheel, 104 is a capstan portion, 105 is a dancer roll for applying screening tension, and 106 is a first capstan. Belt, 107 is a second capstan belt, 108 is a capstan belt portion, 110 is a hollow first capstan shaft, 116 is a second capstan shaft, 121 is an air cylinder, 127, 128 are capstan belt tension levers, 129 is a lever. It is a spring.

Claims (3)

(57) [Claims] 1. A capstan portion comprising a first capstan wheel and a second capstan wheel around which linearly driven linear members are wound, and a first capstan wheel abutting on the first and second capstan wheels. , A capstan belt portion having a second capstan belt, and a screening tension applying dancer roll portion suspended by a linear member stretched between the first and second capstan wheels. In a linear object screening apparatus for removing a strength portion, the first and second capstan shafts are provided on the same axis, and the first and second capstan wheels are rotatable independently of each other. Screening equipment for linear objects. 2. The apparatus for screening a linear object according to claim 1, wherein said capstan belt portion is movable up and down. 3. A linear object screening apparatus according to claim 1, further comprising a belt tensioning mechanism for holding the first capstan belt and the second capstan belt at a constant tension with respect to each other. Screening device.