JPH0672968B2 - Optical fiber cable closure - Google Patents

Description

TECHNICAL FIELD The present invention relates to a closure for an optical fiber cable.

[Prior Art] A conventional optical fiber cable closure has a cylindrical sleeve 1 as shown in Figs. 7 to 13, and the sleeve 1 has semi-cylindrical bodies 2 and 3 in its longitudinal direction. A structure in which a sealing member 4 is interposed between the flanges 2A and 3A of the flanges 2A and 3A facing each other along the openings along with reinforcing members 5 and 6 applied to the surfaces of the flanges 2A and 3A and bolts 7 are tightened to hermetically connect them. Has become.

End face plate mounting grooves 8 are provided on inner surfaces of both ends of the sleeve 1 in the longitudinal direction.
End plates 9 made of rubber are fitted into the respective end face plate mounting grooves 8 so that both ends of the sleeve 1 are airtightly closed by these end face plates 9. A cable through hole 11 for penetrating the optical fiber cable 10 is provided at the center of each end plate 9, and a sealing washer 12 is provided so as to surround the optical fiber cable 10 in the cable through hole 11 so as to be hermetically sealed. There is. The end face plate 9 is also divided into two parts, which are airtightly connected by a tightening ring 13 and a bolt 14.

On both sides of the sleeve 1, there are provided cable grips 15 that are clamped and attached to the outer circumference of the optical fiber cable 10 inserted into the sleeve 1. These cable grips 15 are also split in two and are connected by bolts 16.

Both cable grips 15 are connected by a pair of left and right connecting rods 17 at positions corresponding to the openings along the longitudinal direction of the semi-cylindrical bodies 2, 3. Each connecting rod 17 is attached to the cable holding metal fitting 15 with a bolt 18.

A semi-cylindrical extra length storage shell 19 is projected between the connecting rods 17 toward the semi-cylindrical body 2 side and is suspended and supported by bolts 20. A tension member fixture 21 is fixedly provided at the center of the extra length storage shell 19 in the longitudinal direction. Further, cutouts 22 are provided as a pair at both edges of the opening along the longitudinal direction of the extra length storage shell 19 at positions near both ends in the longitudinal direction. An arc-shaped extra length guide 23 is arranged corresponding to these cutouts 22 with its convex side projecting into the semi-cylindrical body 3. The extra length guide 23 is supported by fitting the locking projections 23 at both ends in the arc direction into the notches 22 and preventing it from coming off by the connecting rod 17.

In the space surrounded by the extra length storage shell 19 and the extra length guide 23, an extra length storage sheet 25 made of a film sheet for collectively storing the extra length portion 24A of the optical fiber core wire 24 is rolled into a spiral shape. It is designed to be stored.

[Problems to be Solved by the Invention] However, in such a structure, the connecting rods 17 are provided on both sides in the width direction of the opening along the longitudinal direction of the semi-cylindrical body 19, and these connecting rods 17 have Since the extra length storage shell 19 is attached so as to hang down, the working direction is limited to only from above the opening along the longitudinal direction of the extra length storage shell 19, and it is difficult to judge the optical fiber core wire 24. There was a point.

Further, since the extra length portion 24A of the optical fiber core wire 24 is packaged and stored by one extra length storage sheet 25, it is impossible to take out the optical fiber core wire 24 one by one, and maintenance etc. In the case of, the optical fiber core wire 24, which does not need to be tampered with, must be touched, causing a problem that causes trouble.

Further, since the extra length portion 24A of the optical fiber core wire 24 is internally wound along the inner circumferences of the extra length storage shell 19 and the extra length guide 23 by utilizing the repulsive force of the core wire 24, 0.25 mmφ In the case of the optical fiber core wire 24 having a small diameter such as the above and the optical fiber core wire 24 having a non-strained coating such as a silicon coat, there is a possibility that the loss may increase or the wire may be disconnected, and there is a problem that it cannot be used.

An object of the present invention is to provide a closure for an optical fiber cable, which is easy to handle, can be applied regardless of the type of the optical fiber, and can handle the optical fiber without adversely affecting other optical fibers.

[Means for Solving the Problems] To explain the constitution of the present invention for achieving the above object, the present invention is directed to a sleeve formed by facing semi-cylindrical bodies face-to-face and airtightly connected, and a cable penetrating in the center. A pair of rubber end plates having holes to hermetically seal both ends of the sleeve;
An optical fiber cable closure comprising a pair of cable grips arranged on both sides in the sleeve for gripping an optical fiber cable, and a connecting rod connecting the cable grips to each other. Is connected to both of the cable gripping metal fittings through the bending-type connecting auxiliary plates so as to face the opening along the longitudinal direction in one of the semi-cylindrical bodies, and the one semi-cylindrical body A surplus length storage case support is fixedly attached to the connecting rod on the surface facing the opening along the longitudinal direction of the stack, and a plurality of surplus length storage cases are stacked on the surplus length storage case support. It is detachably supported by a support rod, a rising portion is provided on one side in the width direction of the extra length storage case support base, and a lid is openably and closably supported at the tip of the rising portion via a hinge. Long income One end of a band for binding the stack of extra length storage cases is fixed to the bottom surface of the case support, and the other end of the band is provided on the surface of the lid on the side opposite to the side where the hinge is provided. It is characterized in that a band temporary locking device for temporarily locking is provided.

[Operation] With this configuration, when the upper half-cylindrical body is removed, the connecting rod exists in the lower half-cylindrical body below the stack of the extra length storage case, so that the connecting rod works. Does not get in the way.

The connecting rod is connected to both of the cable gripping metal fittings through the respective bending-type auxiliary connecting plates so as to face the opening along the longitudinal direction of the one semi-cylindrical body and to exist on the back side. Shape connection auxiliary plate is connected to the cable grip in advance, and then the connecting rod is attached to this bending connection auxiliary plate, or the bending connection auxiliary plate is attached to the connecting rod in advance, and the bending connection is made later. Since the auxiliary plate can be attached to the cable gripping metal, the flexibility of the work procedure is great and the work is easy.

When the connecting rod exists in the back side of the semi-cylindrical body facing the opening along the longitudinal direction, the connecting rod can also serve as a support for each extra length storage case, and the structure can be simplified. it can.

Since there are a plurality of extra length storage cases and the respective optical fiber core wires are distributed and accommodated, the intended optical fiber core wire can be handled without touching the optical fiber core wires that need not be tampered with.

A rising portion is provided on one side in the width direction of the extra length storage case support on the connecting rod, and the lid is openably and closably supported at the tip of the rising portion via a hinge. With the lid open, the lid can also be used as a temporary stand for the extra length storage case that interferes with the work, and the work is easy.

The band has a function of binding the extra length storage case support, the stack of extra length storage cases, and the lid, and moves the extra length storage case above the target extra length storage case onto the retracted lid. At this time, the extra length storage case on the lid side can be temporarily fixed to the lid, and the extra length storage case on the lid can be temporarily held securely so as not to drop, and the work can be performed safely.

[Embodiment] An embodiment of the present invention will be described in detail below with reference to FIGS. 1 to 6. The parts corresponding to those in FIGS. 7 to 13 are given the same reference numerals.

In the optical fiber cable closure of this embodiment, the connecting rod 17 is located in the inner (lower) side of one (lower) semi-cylindrical body 3 so as to face the opening along the longitudinal direction thereof. Are connected to both cable gripping fittings 15 using bolts 16 via bending connection auxiliary plates 26, respectively. The bending-type connection auxiliary plate 26 includes a horizontally oriented first portion 26A connected to the cable gripping metal piece 15, a second portion 26B that falls from the first portion 26A, and a lower end of the second portion 26B. And a third portion 26C that turns horizontally from.
The connecting rod 17 is fixed to the third portion 26C. The tension member fixture 21 is fixedly mounted on the third portion 26C,
The central tension member 27 of the optical fiber cable 10 is adapted to be retained and fixed.

A surplus length storage case support 28 is fixedly provided on the surface of the connecting rod 17 on the side facing the opening along the longitudinal direction of the one semi-cylindrical body 3. At the center of the support base 28 in the longitudinal direction, a rising portion 28A is provided on one side in the width direction of the support base 28. A lid 30 is openably and closably supported at the tip (upper end) of the rising portion 28A via a hinge 29.

A plurality of extra length storage cases are provided on the extra length storage case support 28.
31 are stacked and placed. Extra length storage case 31
Is mainly composed of a half-molded plastic molded product having a thickness of about 0.5 mm, which is formed by connecting the case body 32 and the lid 33 with a hinge 34 so as to be openable and closable. The optical fiber core wire 24 with respect to the case main body portion 32 is lightly pressed by a sponge-like clamp in the core wire introducing portions 35 on the left and right of the edge portion of the case main body portion 32, and then the edge of the case main body portion 32. The core wire connecting portion 36 is sandwiched and fixed by a locking projection 45 provided at the center of the optical fiber core wire 24 on both sides of the core wire connecting portion 36.
Are respectively looped and stored in a flat shape in the case main body 32, and these extra length portions 24A are held by the pressing pieces 37 provided on the case main body 32 so as not to pop out. There is. U-shaped locking slits 38 are provided at both ends of the case main body 32 opposite to the core wire introducing portion 35. Each extra length storage case 31 on the support base 28 is
The engaging slits 38 are fitted into the supporting rods 39 standing upright at both ends of the edge of the supporting base 28 on the side opposite to the rising portions 28A, so that they are detachably engaged.

One end 40A of the band 40, which is a stopper having a male hook portion and a female hook portion on both sides, such as Velcro tape (trade name), is attached to the lower surface of the support base 28 from both ends in the longitudinal direction of the female hook. It is fixed with the part facing outward. The band 40 binds a stack of extra length storage cases 31, and stacks the other end 40B on the above-mentioned one end of the lower surface of the extra length storage case support 28 and connects them by connecting both male and female hooks. It is supposed to be done. Lid 30 on the side opposite the hinge 29
A band locking tool 41 made of a velcro with a male hook portion facing the surface is fixedly mounted on the surface of the band 40 to lock the other end 40B of the band 40.

With this structure, when the upper half cylinder 3 is removed, the opening along the longitudinal direction of the lower half cylinder 2 is entirely opened upward. And in this state,
Since the connecting rod 17 exists below the stacked body of the extra length storage case 31, the connecting rod 17 does not hinder the handling of the extra length storage case 31.

The connecting rod 17 is connected to both of the cable holding metal fittings 15 through the respective bendable connecting auxiliary plates 26 so that the openings along the longitudinal direction of the connecting rod 17 face each other in the one semi-cylindrical body 2. Therefore, the bending-type connecting auxiliary plate 26 is previously connected to the cable gripping metal fitting 15, and this bending-type connecting auxiliary plate is later attached.
The connecting rod 17 can be attached to the connecting rod 17, or the bending type connecting auxiliary plate 26 can be attached to the connecting rod 17 in advance, and the bending type connecting auxiliary plate 26 can be attached to the cable grip 15 later. Has a high degree of freedom and is easy to work with.

Further, when the connecting rod 17 faces the opening along the longitudinal direction of the one semi-cylindrical body 2 and exists on the back side, this connecting rod 17
17 can also be used as a support for each extra length storage case 31, the conventional extra length storage shell 19 as shown in FIG. 11 can be omitted, and the structure can be simplified.

Each extra length storage case 31 has an extra length part of the optical fiber core wire 24.
Since 24A is accommodated in a dispersed manner, the intended optical fiber core wire 24 can be handled without touching the optical fiber core wire 24 that does not need to be tampered with.

A rising portion 28A is provided on one side in the width direction of the extra length storage case support 28 on the connecting rod 17, and a lid 30 is openably and closably supported at the tip of the rising portion 28A via a hinge 29. , If you want to handle the lower side extra length storage case 31 in the stack of extra length storage cases 31, unnecessary upper side extra length storage case
When the lid 30 is rotated 180 ° as shown in FIG. 6 with the back surface of the lid 30 being overlaid, the unnecessary upper excess length storage case 31
Can be removed from the support base 28.

As shown in FIG. 6, the removed extra length storage case 31 is covered with the lid 30.
Can be used as a temporary stand for temporary storage, and work is easy.

The band 40 binds the stack of the extra length storage case support 28 and the stack of the extra length storage case 31 and the lid 30 by connecting both ends 40A and 40B to each other. Further, when the band 40 is bound, when the extra length storage case 31 above the target extra length storage case 31 is moved onto the retracted lid 30, as shown in FIG.
By pressing the extra length storage case 31 on the lid 30 at the other end 40B side of the band 40 as shown in, by temporarily locking the other end 40B of the band 40 to the band temporary locking device 40 of the lid 30, The extra length storage case 31 on the lid 30 can be safely held temporarily so as not to drop, and the work can be performed safely.

[Effects of the Invention] As described above, according to the present invention, the following effects can be obtained.

(A) When the upper semi-cylindrical body is removed, the connecting rod does not hinder the work because the connecting rod exists in the lower semi-cylindrical body below the stack of extra length storage cases.

(B) Since the connecting rod faces the opening along the longitudinal direction of one of the semi-cylindrical bodies and is connected to both the cable holding metal fittings through the respective bent connecting auxiliary plates so that it exists on the back side. , A method of previously connecting the bending-type connecting auxiliary plate to the cable gripping metal fitting and then attaching a connecting rod to this bending-type connecting auxiliary plate, or attaching the bending-type connecting auxiliary plate to the connecting rod in advance, and then A method of attaching the bending-type auxiliary connecting plate to the cable holding metal fittings can be adopted, and the flexibility of the work procedure is large, and the work is easy.

(C) Since the connecting rod is present on the back side in the one semi-cylindrical body facing the opening along the longitudinal direction thereof, the connecting rod can also be used as a support for each extra length storage case, and the structure is simplified. Can be achieved.

(D) Since there are a plurality of extra length storage cases and the optical fiber core wires are distributed and accommodated, the intended optical fiber core wire can be handled without touching the optical fiber core wires that need not be tampered with. .

(E) Since the rising portion is provided on one side in the width direction of the extra length storage case support on the connecting rod, and the lid is openably and closably supported at the tip of the rising portion through the hinge, With the lid opened via the lid, the lid can also be used as a temporary stand for the extra length storage case, which is an obstacle to the work, and the work is easy.

(F) The band can bind the extra length storage case support, the stack of extra length storage cases, and the lid, and the extra length storage case above the target extra length storage case can be placed on the retracted lid. When moved, the extra length storage case on the lid side can be temporarily fixed to the lid, and the extra length storage case on the lid can be safely held temporarily so as not to drop, and work can be performed safely. it can.

[Brief description of drawings]

1 and 2 are a partially longitudinal side view and a partially longitudinal plan view of one embodiment of the closure according to the present invention, and FIG. 3 shows the internal structure of the closure of this embodiment with the sleeve removed. FIG. 4 is a perspective view, FIG. 4 is a developed plan view of the extra length storage case used in the present embodiment, and FIGS. 5 and 6 are side views and a part thereof showing a stacked storage state of the extra length storage case in the present embodiment. FIG. 7 is a side view showing a state in which the extra length storage case is temporarily stored on the back surface of the lid, FIG. 7 and FIG. 8 are partially longitudinal plan views and partially longitudinal side views of the conventional closure, and FIG. FIG. 10 is a right side view of the figure, FIG. 10 is a sectional view taken along line XX of FIG. 9, and FIG. 11 is a perspective view of a conventional closure with a sleeve removed.
FIG. 12 is a perspective view of a conventional extra length storage sheet, and FIG. 13 is a cross-sectional explanatory view showing a stored state of a conventional extra length storage sheet. 1 ... Sleeve, 2, 3 ... Semi-cylindrical body, 4 ... Sealing material,
9 ... End plate, 10 ... Optical fiber cable, 11 ... Cable through hole, 12 ... Sealing washer, 15 ... Cable gripping metal, 17 ... Connecting rod, 21 ... Tension member fixing tool, 24 ... Optical fiber core wire, 26 ... Bending type connection auxiliary plate, 27 ... Center tension member, 28 ... Extra length storage case support, 28A ... Standing part, 29 ... Hinge, 30 ... Lid, 3
1 …… Extra length storage case, 36 …… Core wire connection part, 38 …… Lock slit, 39 …… Support rod, 40 …… Band, 41 …… Band temporary locking tool.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 999999999 Fujikura Co., Ltd. 1-5-1 Kiba, Koto-ku, Tokyo (72) Inventor Shinichiro Ota 6 Hachiman Kaigan Dori, Ichihara City, Chiba Furukawa Electric Co., Ltd. In-house (72) Hidehisa Miyazawa 6 Yawata Kaigan-dori, Ichihara-shi, Chiba Furukawa Electric Co., Ltd. Chiba Electric Wire Works (72) Inventor Mitsuyoshi Katsuse 1-6 Uchiyuki-cho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Akiyuki Sano 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Yuzo Tokumaru 1 Tayacho, Sakae-ku, Yokohama-shi, Kanagawa Sumitomo Electric Industries Co., Ltd. Yokohama Manufacturing In-house (72) Inventor Yoshikazu Nomura 1440 Rokuzaki, Sakura-shi, Chiba Fujikura Electric Co., Ltd.Sakura factory (56) Reference References JP 57-108815 (JP, A) JP 57-176013 (JP, A) JP 61-25112 (JP, A) Actual development 53-54037 (JP, U) Actual 60- 115205 (JP, U)

Claims (1)

[Claims] 1. A sleeve comprising semi-cylindrical members facing each other and airtightly connected to each other; a pair of end face plates having a cable through hole at the center to hermetically close both ends of the sleeve; An optical fiber cable closure provided with a pair of cable holding metal fittings arranged on both sides of the optical fiber cable for holding the optical fiber cable, and a connecting rod connecting the two cable holding metal fittings to each other. The semi-cylindrical body is connected to both of the cable gripping metal fittings through bending-type connecting auxiliary plates so as to face the opening along the longitudinal direction and to be present on the back side, and the longitudinal direction of the one semi-cylindrical body. An extra length storage case support is fixedly attached to the connecting rod on a surface facing the opening along the support rod, and a plurality of extra length storage cases are stacked on the extra length storage case support to form a support rod. Freely removable Supported, a rising portion is provided on one side in the width direction of the extra length storage case support base, and a lid is openably and closably supported at the tip of the rising portion via a hinge. One end of a band for binding the stack of extra length storage cases is fixed to the bottom surface, and the other end of the band is temporarily locked to the surface of the lid on the side opposite to the side where the hinge is provided. A closure for an optical fiber cable, which is provided with a band temporary locking tool.