JPH05107165A - Device for testing tension resistance of optical fiber thread - Google Patents

Abstract

PURPOSE:To easily put a optical fiber thread on capstans at the work starting time or disconnection time by installing releasable belt trapping devices to the capstans and, at the same time, making guide rollers of a tension applying device movable in the vertical direction. CONSTITUTION:Releasable belt trapping devices 8 and 9 are respectively fitted to the outer peripheries of capstans 6 and 7 and, in the device 8, arms 81 and 82 are separated from the capstan 6 by moving the arms 81 and 82 in the vertical direction by utilizing the extension and contraction of a liquid-pressure cylinder 83 so that a coated optical fiber 1 can be easily put on the capstan 6. The same can be said of the device 9. In a tension applying device, fiber putting work is made easier by raising guide rollers 4A and 4B to the positions shown by broken lines by engaging a threaded shaft 31 with an elevating frame 3 and driving the frame 3 with a drive motor 33. In addition, when the feeding amount of the shaft 31 is adjusted, the lengths of tension applying sections P, Q, and R extended over the contact points of the rollers 4A and 4B with the fiber 1 can be adjusted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tensile strength tester for an optical fiber wire, and more specifically, a tensile strength tester for an optical fiber wire which can be easily hooked and whose tension applying section length can be increased or decreased. The present invention relates to a test device.

[0002]

2. Description of the Related Art A conventional optical fiber line tensile strength tester will be described with reference to FIG. The optical fiber line 1 sent from the sending device 10 is sent to the first take-up device 102 via the dancer roll device 12. The first take-up device 102 is a capstan wheel 102 rotatably provided on the frame 101.
It is a so-called belt wrap capstan, which is a so-called belt wrap capstan in which a belt 102B is placed in contact with the outer circumference of A and the optical fiber line 1 to be taken is sent while being pressed against the outer circumference of the capstan wheel 102A. Two guide rollers 104 and 109 are rotatably provided on the frame 101 downstream of the first take-up device, and the rocking roller 1 is provided between the two guide rollers in the traveling direction of the optical fiber line 1.
A tension applying device including 05 is provided. The oscillating roller 105 is provided at one end of a rotating lever 106 rotatably provided on the frame 101 so as to be rotatable around its own axis, and an appropriate weight 107 is hung at the other end. The weight of the weight 107 adjusts the magnitude of the tension applied to the optical fiber line 1. In addition,
The distance PQR from the point P where the optical fiber line 1 is in contact with the guide roller 104 to the point R where it is in contact with the guide roller 109 via the point Q where it is in contact with the swing roller 105 is the tension applying section. A second take-up device 103 is provided downstream of the guide roller 109. This is a belt wrap capstan having the same structure as the first take-up device 102, 103A is a capstan wheel, and 103B is a restraining belt. After the second take-up device 103, the optical fiber line 1 is taken up by the take-up device 11 via the dancer roll device 13.

An example of the tensile strength test method of the optical fiber line 1 using the above-mentioned device will be described. The weight K of the weight 107 is selected and the force K for rotating the rotation lever 106 in the clockwise direction is set to a desired value. Is to set. At this time, K / is set between the two guide rollers 104 and 109 fixed to the optical fiber line 1.
It can be seen that a tension of 2 magnitude is applied. The elongation to be given to the optical fiber wire for the tensile strength test is specified by the standard as 0.85, 1.0, 2.0%, etc., and such elongation should be detected and measured by the dancer roll device 13. Therefore, the weight of the weight 107 that causes such elongation can be known in advance and the test can be performed.

[0004]

When a test is performed by the above-mentioned tensile strength tester, if the optical fiber line 1 is broken, the optical fiber line 1 is held as the capstan wheel 102A of the first take-up device 102. It is inserted between the belts 102B, and then the optical fiber line 1 is provided below the guide roller 10
4 and hang it on it, lift it up and hang it on the rocking roller 105, and then lower it again to lower the guide roller 109.
The capstan wheel 103A of the second take-up device.
The optical fiber line 1 is inserted through a narrow space, is vertically moved up and down, and the running route of the optical fiber line 1 is laid in a complicated manner such that the optical fiber line 1 is guided through the restraining belt 103B to the dancer roll device 13. Has the drawback of being complicated and time consuming.

[0005]

SUMMARY OF THE INVENTION The present invention provides a tensile strength test apparatus for an optical fiber wire which eliminates the above-mentioned conventional drawbacks and simplifies the hooking at the start of work or at the time of disconnection. , Specifically, it is provided on the frame base, and 2
A first take-up device and a second take-up device, each of which is formed by engaging two releasable belt wrap devices with one capstan vehicle, and light of the first take-up device and the second take-up device of the frame base. An elevating frame that is vertically movable in the middle of the running direction of the fiber line and that rotatably carries two guide rollers around their own axes, and is swingable via the guide rollers and a rotation lever between them. And a tension applying device composed of a swinging roller provided in the optical fiber line.

Further, the present invention is a tensile strength test apparatus characterized in that, in the above-mentioned optical fiber wire tensile strength test apparatus, the guide roller is vertically adjusted by a feed screw shaft rotatably provided on a frame base. ..

[0007]

In the releasable type belt wrap device, by opening the retainer belt and releasing it from the contact with the capstan wheel, it is possible to make a wide gap between the two for convenient passage. Of the guide roller of the tensioning device, the guide roller of the tension applying device, the swing roller, and the guide roller on the downstream side of the optical fiber line. It can be passed straight through the three rollers.

Further, in the tensile strength tester for the optical fiber wire of the type in which the guide roller is fed by the feed screw, the position of the guide roller can be easily adjusted quantitatively, and the length of the tension applying section can be arbitrarily selected and set. ..

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIGS.
Will be described. Optical fiber line 1 depicted in FIG.
A delivery device 10, a dancer roll device 12, from which
Since 13 and the winding device 11 are the same as the conventional device, the same reference numerals are used and the description thereof is omitted. The first take-up device is formed by engaging a releasable belt wrap device 8 with the outer circumference of the capstan wheel 6. Releasable belt wrap device 8
The two arms 81, 82, one end of which is rotatably connected to the rotation shaft 84, are extended and closed by expanding and contracting the fluid pressure cylinder 83, which is connected in the middle of the two arms. A belt roller (not shown) is rotatably provided at the free ends of the rotary shaft 84 and both arms 81 and 82, and these three belt rollers are restrained. The belt 85 is wound around. The second take-up device on the downstream side has the same structure, and the releasable belt wrap device 9 is engaged with the capstan wheel 7. Although the piping is not shown, the fluid pressure cylinder 83 is configured so that pressure fluid can be freely supplied and discharged from the outside by, for example, a solenoid valve.

Next, the tension applying device will be described. Two guide rollers 4A, 4B are provided on an elevating frame 3, which is a suitable block slidably provided on the frame base 2, so as to be rotatable about its own axis. As is apparent from FIG. 2, a feed screw shaft 31 is screwed onto the elevating frame 3, and a guide rod 32 is slidably engaged. The feed screw shaft 31 is rotationally driven by a drive motor 33. The lifting frame 3 can be lifted up to a position where the lower ends of the peripheral edges of the guide rollers 4A and 4B are located above the upper ends of the peripheral edges of the swing rollers 5, as shown by the broken line in FIG. In addition, reference numerals 51 and 52 respectively denote a rotating lever for supporting the swing roller 5 and a weight for adjusting tension.
Further, in this embodiment, by adjusting the feed amount of the feed screw shaft 31, the tension applying section P extending between the contact points P and R between the guide rollers 4A and 4B and the optical fiber line 1 is adjusted.
The length of QR can be adjusted.

[0011]

According to the device of the present invention, since the take-up device is provided with the releasable belt wrap device, the holding belt is opened and released from contact with the capstan wheel, so that the space between the two is released. It is possible to make a wide space for easy wire passing, and since the two guide rollers of the tension applying device are attached to the elevating frame that can move up and down with respect to the frame base, raise the position of the elevating frame. Since it becomes possible to move the lower end of the peripheral edge of the guide roller above the upper end of the peripheral edge of the swing roller, the optical fiber line is provided in three parts, that is, the guide roller of the tension applying device, the swing roller, and the downstream guide roller. Since the rollers can be linearly threaded, these two advantages have the advantage that it is extremely easy to wire the optical fiber to the device. Further, there is an effect that the length of the tension applying section can be easily selected and set by adjusting the feed amount of the feed screw shaft, and this can be kept constant regardless of the linear velocity.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a schematic front view showing an example of a conventional tensile strength tester for optical fiber lines.

[Explanation of symbols]

 1 Optical Fiber Line 2 Frame Stand 3 Lifting Frame 4A, 4B Guide Roller 5 Swing Roller 6, 7 Capstan Wheel 8, 9 Releasable Belt Wrap Device

Claims (2)

[Claims] 1. A first take-up device (6, 8) and a capstan vehicle, which are provided on a frame base (2) and in which a releasable belt wrap device (8) is engaged with the capstan vehicle (6). A second take-up device (7, 9) in which a releasable belt wrap device (9) is engaged with (7), the first take-up device (6, 8) and the first take-up device (6, 8) of the frame base (2). An elevating frame (3) movably provided in the middle of the optical fiber line running direction of the two take-up devices (7, 9) and carrying two guide rollers (4A, 4B) rotatably around their own axes. ), And a tension applying device including the guide rollers (4A, 4B) and a swing roller (5) swingably provided between the guide rollers (4A, 4B) via a rotary lever (51). Wire tension tester. 2. The tensile strength of the optical fiber line according to claim 1, wherein the elevating frame (3) is adjusted up and down by a feed screw shaft (31) rotatably provided on the frame base (2). Test equipment.