JPS5938719A - Holder for jointing optical fibers by arc welding - Google Patents

Abstract

PURPOSE:To prevent breakage and damage by detaching a movable block which sandwiches an optical fiber by means of a spring pressure from a stationary block in the stage of removing the same thereby expanding the space between both blocks and permitting easy and safe installation and removal to and from a slip holder. CONSTITUTION:A pressing spring 20 is simply in contact with a movable block 13 and a vertical plate part 22 and does not act compressive force while retaining members 7a, 7b for optical fibers are in a horizontal positon. Therefore, only the repulsive force of a spring 15 acts on the block 13, and an optical fiber 1a is grasped by means of grasping members y3, y4 with a suitable grasping force. If the members 7a, 7b are lifted, the plate part 22 enters the inside of an opening 24 and compresses the spring 20, and at the point of the time when the repulsive force of the spring 20 overcomes the repulsive force of the spring 15, the block 13 is detached from a stationary block 14, and the space between the members y3, y4 is substantially expanded while a horizontal plate part 21 is in a horizontal position, thus allowing the easy removal of the fiber 1a.

Description

[Detailed description of the invention] The present invention relates to a holding device for optical fiber fusion splicing.

FIG. 1 and FIG. 2 show such a conventional device.
To mutually fusion-splice a pair of optical fibers (1, 1a, (1) b), these ends L21 a, +21
Remove the coating by a predetermined length from b, and then remove the coating from each end (2).
Items a and (2) b are also cut to a predetermined length and the end surfaces are polished.

Next, each fiber (11a, (11b) covering part f31a, (31b) is attached to a slip holder (41a
(21a, (21b are also formed on the two sides of the fusion splicing bases (5)a, (5)b). Concave groove (6
After fitting into each slip holder (41a, (41b), the fiber holding members (7)a, (7)b, which are rotatably attached to each slip holder (41a, (41b), are rotated,
Optical fiber (1) a, (11b) is pressed.

Next, the arrow X' force direction slip holder (41a) in FIG.
, (By moving 41b, the optical fiber end (
The end faces of 2)a and (2)b are connected to the fusion splicing bases (5)a and (5).
) A butt plate (8) arranged in the center of b so that it can move up and down.
The spacing is set by this.

After setting the interval, the abutment plate (8) moves downward, and the optical fiber ends (21a, 21b are attached to the slip holders (4)
) a , (4) b , it is sent again in the direction of the arrow X′ force, but from a predetermined point in time during this retransmission, discharge heating by the discharge electrodes t9) m , (9i n ) is started, and as a result, the above-mentioned both ends The portions (2)a and (2)b become molten, and the two end portions (2)a and (2)b are fused together through the abutting force in the direction of the arrow X' force.

By the way, as shown in Fig. 1, the slip holder (4)
a, (4) b are fusion splicing stands (51a, (51
A pair of slip holders (41a, (41b
The main components are a movable block α9 and a fixed block 0, each having a pedestal having a front wall part QO+ and a rear wall part υ, and bottle-shaped clamping members x1 to X4 and Yl to y4 on two sides. The fixed block α4 is fixed on the pedestal Z with screws etc., and the fixed block α4
A spring 051 is attached to the movable block α□□□, which is movable in the direction of the arrow Y-Y' in FIG. It is given an explosive force in the direction of the arrow.

Further, the pedestal az is provided so as to be movable forward and backward in the direction x-x' in FIG. 141I are juxtaposed on a line perpendicular to the direction of movement of the pedestal (xx' direction).

By the way, when fusion splicing a pair of optical fibers together as described above, the covering portions (
3)a and (3)b into the slip holder (41a).

(4) It is fitted between the clamping members x1 to x4, y, to y4 of b. At this time, movable block 0 is separated from fixed block C141 against the elastic force of spring +151, that is, as shown in the drawing. Move the holding members x1 to
1) Fit b into the clamping members x1 to x4 and yl-74, and when this work is completed, the movable block 0 moves in the direction of the fixed bronze 20 due to the elastic force of the spring α.

In this state, the clamping parts sX1 to X4. %Y+-Y
4 in the Y-Y' direction is set smaller than the outer diameter of the optical fiber coating parts (31a, +31b), so the optical fibers (11a, (1)b are fixed and held with an appropriate clamping force. It turns out.

After setting the optical fibers [1) a, (1) L) in this way, rotate the fiber holding members (7) a, (71b) as shown in Fig. 2 to remove the optical fibers (
+1 a.

tl) b, and when the fusion is completed, lift the fiber holding part t7) a, (1) b and rotate it to the dotted line position in the figure.

Next, the fused optical fibers [11a, 11b are removed from between the clamping members
Since the optical fibers 31b are pinched by the clamping members, it is difficult to remove them, and for this reason, the optical fibers [1)a, (11b) are often bent during removal, and in this state, the optical fibers [11a], (11b) are bent.

(If you take out 11b, the connection will break,
In addition, the discharge electrodes (9) m and 191 n may be caught and scratched, and in severe cases, this may lead to breakage. There were some problems.

The present invention aims to solve the above problem by separating the movable block from the fixed block and widening the interval between the movable block and the fixed block when removing the optical fiber. To explain, in Figure 3 (a) and (b), (2 [is a suppression spring for moving the movable block 0, which passes through the fixed block 0, and one end is the movable block 03). The other end is in contact with the lower end of the fiber holding member (71a, (71b), as will be described later).

Fiber holding member +718 ,, (The force is pedestal α2
It is attached to the rear wall part Uυ so that it can be rotated up and down, and this point is similar to the above conventional example, but in the present invention,
Clamping part/material x1-X4. Optical fiber between 11-74 (1
1a, (1) A rectangular cross section consisting of a horizontal plate part Qυ that can be pressed freely against b, and a pressing part @ (hereinafter referred to as a vertical plate part) formed by bending the side end of the horizontal plate part Qυ. The vertical plate part is pivotally supported on the rear wall part 0υ of the pedestal uz via a shaft rod, and the fiber holding members [71a, (71b are shown in FIG.
When lifted from the state of a), the vertical plate part (a) is located at the rear wall part 0.
It is designed to fit into the opening (c) made at υ.

On the other hand, as described above, the other end of the pressing spring (20) that passes through the fixed block C14J protrudes from the fixed block 041 and is in contact with the lower end @a of the vertical plate member.

Here, to describe the case of removing the optical fibers (tl)a, (11b) from between the clamping members x1 to X4 and Y+ to y4, first, from the state shown in However, in the state shown in the figure, although the pressure spring C!■ is in contact with the movable block 03) and the vertical plate part (A), no compressive force is acting on the spring holder. , Therefore, only the elastic force of the spring α9 acts on the movable block 03), and the optical fibers (1) a, (11b) are clamped by the clamping members x1 to x4 and y1 to y4 with appropriate clamping force. .

From this state, the fiber holding member (71a, L7)
When b is lifted, the vertical plate begins to enter the opening (c) and begins to compress the compression spring (a).

Then, when the elastic force of the suppression spring (20) overcomes the elastic force of the spring (19), the movable block α3 starts to separate from the fixed block (14J, and the horizontal plate part Q1)
As shown in figure (b), at the point when it is almost upright,
The spacing between the clamping members x1-X4%Y1-y4 is sufficiently wide, so that the optical fibers II) a and (1) b can be easily removed.

In the above, the fiber holding members (7) a, (71b) were used to compress (move) the suppression spring holder, but apart from this, a lever etc. is provided on the pedestal (17J), and by this a lever etc. is provided on the cradle (17J). c2e may be compressed and moved.

Further, in the above embodiment, a suppression spring is used to move the movable block, but the member for moving the movable block is not limited to the suppression spring, and for example, a bar may be used.

When a bar is used, one end of the bar is provided so as to be able to come into contact with the movable block and the other end with the lower end of the holding member or a lever provided on the pedestal, as in the case of a pressing spring.

As described above, in the present invention, a movable block moving member is provided that passes through a fixed block, and one end of the movable block moving member is brought into contact with the movable block, and the other end is brought into contact with a pressing portion that can freely apply a moving force to the member. When attaching or removing the optical fiber to the slip holder, the movable block is separated from the fixed block by moving the movable part using the abutment part, and the gap between the clamping members is sufficient. This makes it easier to install and remove the optical fiber, and this prevents the optical fiber from being bent due to mishandling when removing it, thereby preventing it from being removed in a bent state. Therefore, the occurrence of a situation such as a breakage of the connection portion is suppressed as much as possible, and the situation of contact with other members that may lead to breakage or damage is also prevented.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view of the conventional device, FIG. 2 is a sectional view of the slip holder of the same device, FIG.
b) is a sectional view showing the state when the optical fiber is attached to or removed from the same slip holder. (11a, (11b... optical fiber f21
a, +21 b”... Optical fiber end (31
a, (31b-fist...coated part (41a, (4
1b...Slip holder (51a, (51b)
...Fusion splicing stand (61a, (61b...)
・Concave grooves t71 a, +71 b...Fiber holding member α...Bed holder...1 movable block α...Fixed block α8...Spring wire ・... Suppressing spring X, ~ 162 Shirakata Shirane, Nippon Telegraph and Telephone Public Corporation, Ibaraki Telecommunications Research Institute Author: Masataka Hirai 162, Shirakata Shirane, Nippon Telegraph and Telephone Public Corporation, Ibaraki Telecommunications Research Institute, Tokai Village, Naka-gun, Ibaraki Prefecture, 0 Author: Old Shin - Ibaraki Telecommunications Research Institute, Nippon Telegraph and Telephone Public Corporation, 162 Shirane, Shirakata, Tokai-mura, Naka-gun, Ibaraki Prefecture 0 Applicant: Nippon Telegraph and Telephone Public Corporation

Claims (1)

[Scope of Claims] m. A fusion splicing stand for connecting optical fibers, which has a recessed groove for fitting the end of the optical fiber formed on its upper surface, and a fusion splicing stand adjacent to the side of the fusion splicing stand facing the end of the recessed groove. A slip holder for moving the optical fiber is arranged and can move forward and backward with respect to the fusion splicing table. It consists of a movable block and a fixed block that are juxtaposed on a line perpendicular to the advancing and retreating direction of the pedestal, and a clamping member for holding the optical fiber is provided on the upper surface of both blocks, and the fixed block is fixed to the pedestal. The movable block, which is attached to the movable block and can be freely separated from the fixed block, is given an elastic force in the direction of the fixed block via a spring,
Furthermore, in an apparatus in which a fiber holding member is attached to the pedestal so as to be able to freely press up and down against the optical fiber held by the holding members of both blocks, a movable block moving member passing through the fixed block is attached. has,
One end of the movable member is in contact with the movable block, and the other end is provided so as to be in contact with a pressing portion provided on the fiber holding member or the pedestal and capable of freely applying a moving force to the movable member. A holding device for optical fiber fusion splicing, characterized in that: (2) The fiber holding member consists of a horizontal plate part that can be freely pressed against the optical fibers on the movable and fixed blocks, and a vertical plate part with the proximal end of the horizontal plate part bent. 2. The holding device for optical fiber fusion splicing according to claim 1, wherein: is in contact with the other end of said compression spring. (3) The optical fiber fusion device according to claim 1, wherein the fiber holding member is formed in a cross-sectional shape, and the vertical plate portion of the member is rotatably supported on the cradle. Holding device for connection.