JP3115358U - End support device for drop support line - Google Patents

Abstract

When installing or adding a drop optical cable in a closure, it is possible to easily and quickly process a support wire end of the drop optical cable.
An end storage device for a drop support line has an engagement portion that engages with a mounting portion on one side, and a drop support line can be inserted from the connection work side of a closure on the other side. When the plate surface has four drop support line insertion holes 6 and the plate surface is turned around the vertical axis, the engagement portion 5 and the drop support line insertion hole 6 are arranged symmetrically, and the base 2 is closed. The attachment part 3 fixed to the closure auxiliary bar 41 on the side of 40, and the drop support line is prevented from coming off by the bending force generated by bending the tip part of the inserted drop support line on the back side of the base surface 2a. It is comprised by the accommodating part 4 which has the space 15 which becomes.
[Selection] Figure 1

Description

The present invention provides a drop optical fiber cable (hereinafter referred to as a drop optical cable) as a lead-in wire connecting the closure to each building in a closure (connection terminal box) of an optical fiber cable (hereinafter referred to as an optical cable) installed between utility poles. It is related with the end part accommodating apparatus of the drop support line which accommodates the end part of the drop support line.

  In recent years, optical cable networks have been widely spread throughout the country. In the case of an optical cable erected between utility poles, a drop optical cable that is a lead-in line can be pulled from a closure provided at a suitable location of the trunk optical cable between utility poles in order to draw down the optical fiber cores to individual users such as buildings or houses. This is done by branching and connecting to individual users. The drop optical cable used here is a flat single-core optical fiber cable (for example, standard information TR C 0017) integrated with a drop support wire (second tensile body) with a jacket so that it can be wired outdoors. (For example, refer to FIG. 1 of JP-A-2003-140011).

Then, in the case of lead-in wiring, as shown in FIGS. 7A and 7B, the end of the drop optical cable 30 is torn and separated into a drop support line 31 and an optical element part 32, and One side is fixed outdoors on the user side, and the optical element part 32 is pulled into the user side indoors. The other end of the drop support line 31 is collected in the closure 40 while maintaining a tension with the user's house by the retainer 35 in the utility pole 33 or the support pole 34 between the utility poles. At the end of the drop support line 31 on the user house side, there is one drop optical cable 30 and it is easily fixed. However, on the closure 40 side, a plurality of drop optical cables 30 are gathered, and the end processing is performed by cutting the drop support line 31 and bundling the drop support line 31 alone or together with the optical element part 32 by a string 36 or the like. As another example, a rod body (drop support line gripping tool) 42 is provided on the rod body of the closure 40 and is fixed together at the tip of the rod body 42 (see Non-Patent Document 1). In the figure, reference numeral 41 denotes a closure auxiliary rod for installing the closure 40 on the support wire 34, 32a is an optical fiber core wire, and 32b is a tension member (first strength member).
Kenichi Nishimura, Hidetoshi Shirakawa, “Revised 3rd edition Easy Fiber Optic Communication” The Telecommunications Association, May 17, 1999, page 177

In the above-described processing of the drop support line end of the conventional drop optical cable, the drop construction from the closure 40 is not completed at once, and the drop optical cable 30 is generally added at different times. Each time, the string 36 or the like is removed and the string is re-fixed again, which makes the construction complicated and cannot be performed in a short time.

The present invention has been made in view of the above-mentioned problems, and the object of the present invention is to easily and quickly process the end of the drop support line of the drop optical cable when installing or adding the drop optical cable in the closure. It is to provide an end storage device for a drop support line.

In order to achieve the above object, an end storage device for a drop support line according to claim 1 is provided.
It is a plate material having an engagement portion that engages with a mounting portion described later on one side, and having at least one drop support line insertion hole into which the drop support line can be inserted from the connection work side of the closure on the other side. When flipped to the center of the vertical axis, the engaging portion and the base portion where the drop support line insertion hole is disposed symmetrically,
An attachment portion for fixing the base on the side of the closure;
A housing having a space that prevents the drop support line from coming off due to a bending force generated by bending a tip portion of the drop support line to be inserted on the back surface of the base on the back side of the surface into which the drop support line is inserted. In the department,
Composed.

In addition, an end storage device for a drop support line according to claim 2, with respect to claim 1,
In the base, the drop support line insertion holes are horizontally long rectangles, and are arranged in four rows in the vertical direction, the engagement portions have mounting female screw portions at the corners, and the stop insertion holes are the drop support holes. Provided in the vicinity of the wire insertion hole, a long hole is provided in the vertical direction of the position where the tip of the drop support line can be confirmed,
The mounting portion includes an arm portion having a substantially right-angled hook shape, a locking portion provided at both end portions of the arm portion in contact with the thickness portion of the base portion, and an attachment provided at a central position of the arm portion. Hole, bent into a shape corresponding to the cross-sectional shape of the closure auxiliary rod, and a bar receiving portion provided in an intermediate portion of the arm portion, inserted into the mounting hole, engaged with the mounting female screw portion, and the base portion It is composed of a mounting bolt that is fixed to the closure auxiliary rod,
The storage part has a space inside by bending the periphery of a substantially rectangular shape with four corners cut off, the space depth being provided at a depth at which the bending force of the drop support line can be generated, and the space vertically long Corresponding to the longitudinal length of the base, the lateral width of the space covers the drop support wire insertion hole and the long hole, a female threaded portion is provided at a substantially center, and a retaining bolt is inserted from the stationary insertion hole and is engaged with the female retaining screw portion. The space is formed on the back surface of the base.

Further, an end storage device for a drop support line according to claim 3 is:
A base that has at least one drop support line insertion hole into which a drop support line can be inserted from the connection work side of the closure, and is disposed on the side of the closure;
An attachment for securing the base on the side of the closure;
A storage portion having a space that prevents the drop support line from coming off due to a bending force generated by bending a tip end portion of the drop support line to be inserted on the back surface of the base on the back side of the surface into which the drop support line is inserted. And
Composed.

Further, an end storage device for a drop support line according to claim 4 is in contrast to claim 1 or 3,
The storage portion is configured to sandwich and fix the tip end portion of the drop support line with a sandwiching plate on the back surface of the base.

Further, an end storage device for a drop support line according to claim 5 is in contrast to claim 1 or 3,
The attachment portion is attached to a support line between a closure or a utility pole.

And the edge part accommodating apparatus of the drop support line which concerns on Claim 6 is with respect to the said Claim 2,
The storage portion is formed in a box shape of an elastic material, has an engaging groove that slides and engages with the upper and lower sides of the base portion, and is attached to the back surface of the base portion by an elastic force.

With the drop support line end storage device according to the first to sixth aspects of the present invention, when the drop optical cable is installed or added in the closure, the drop support line end can be processed easily and in a short time. Further, in the first and second drop support line end storage devices, the same base can be installed on both the left and right sides of the closure. It can be installed on the left and right, and the drop support wire can be securely and easily stored by loosening the bolts. Since the storage part is detachable by a set bolt, the optimum space size can be selected. Further, according to the fourth aspect of the present invention, a reliable tensioning capability is ensured, and according to the fifth aspect of the present invention, the base can be reliably disposed even when the arrangement environment of the closure is special. In claim 6, the number of constituent members of the apparatus can be reduced.

Hereinafter, an end storage device for a drop support line according to a first embodiment corresponding to claim 2 will be described with reference to the drawings. As shown in FIGS. 1 and 2, the end support device 1 for the drop support line of the first embodiment includes a base 2, an attachment portion 3, and a storage portion 4.

As shown in FIGS. 1, 2, and 3 (a), the base 2 is a substantially rectangular plate material, has an engaging portion 5 that engages with the mounting portion 3 on one side, and a closure 40 on the other side. A drop support line insertion hole 6 into which the drop support line 31 can be inserted from the connection work side. As shown in FIGS. 3A and 3B, when the plate surface is turned around the vertical axis, the base portion 2 has the engaging portion 5 and the drop support line insertion hole 6 arranged symmetrically. That is, this is a case where the surface state of the base portion 2 shown in FIGS. 1 and 3A is arranged on the right side of the closure 40 as viewed from the connection operator. Then, the drop support line insertion hole 6 corresponds to the case where the drop support line 31 is inserted from the left side of the closure 40 only by changing the base part 2 of the surface state to the back surface state of the base part 2 shown in FIG. As a result, the same base 2 can be disposed on the left side of the closure 40. The drop support line insertion holes 6 are horizontally long rectangles, and four drop support line insertion holes are arranged in a line in the vertical direction. The size of the drop support line insertion hole 6 is such that two drop support lines 31 can be inserted. Moreover, the engaging part 5 has the attachment internal thread part 7 with which the attachment bolt 14 engages in a corner | angular part. A stop insertion hole 8 through which the stop bolt 17 is passed is provided in the vicinity of the drop support line insertion hole 6, and a long hole 9 is provided in the vertical direction where the tip of the drop support line 31 can be confirmed. The material used for the base 2 is steel, and if necessary, heat treatment is applied from the strength surface, surface treatment is performed from the weather resistance, and a synthetic resin material can be used if the conditions such as the strength surface are satisfied. . The same applies to the materials used for the constituent members to be described later, and a description thereof is omitted.

The mounting portion 3 fixes the base portion 2 on the right side of the closure 40, and as shown in FIGS. 1 and 2, the arm portion 10, the mounting hole 11, the locking portion 12, the rod receiving portion 13, and the mounting bolt. 14. The arm part 10 has a substantially right-angled planar shape, and an attachment hole 11 is provided at the center position. The locking portion 12 is provided at both end portions of the arm portion 10 so as to be in contact with the thickness portion of the base portion 2. Further, the rod receiving portion 13 is bent at the middle portion of the arm portion 10 so as to correspond to the circular cross section 41 a of the closure auxiliary rod 41. The mounting bolt 14 engages with the mounting female screw portion 7 of the base portion 2 and is inserted into the mounting hole 11 so as to sandwich and fix the closure auxiliary rod 41 between the base portion 2 and the rod receiving portion 13. In this case, on the right side of the closure 40. Be placed. The mounting bolt 14 used in this embodiment and the later-described set bolt 17 are hexagon socket head cap screws (JIS B 1176), and various bolts can be selected and used without being limited thereto.

As shown in FIGS. 2 and 4, the storage portion 4 is formed so as to have a space 15 inside by bending a periphery 4 a of a substantially rectangular plate member having four corners cut off. As shown in FIG. 5, when the space 15 is formed on the base back surface 2 b on the back side of the base surface 2 a that is the insertion surface of the drop support line 31, the tip portion of the drop support line 31 to be inserted is in the space 15. The capacity that can be bent to generate a bending force is secured. The strength of the bending force generated here ensures a force that can prevent the drop support line 31 from coming out of the drop support line insertion hole 6. For this reason, the space depth D is selected so as to correspond to various material rigidity of the drop support line 31 and to generate a necessary bending force. Further, the space 15 is limited to the base back surface 2b of the drop support line insertion hole 6 so that the tip end portion of the drop support line 31 is effectively bent when the drop support line 31 is inserted. Further, the space length H corresponds to the length of the base 2, and the space width W is large enough to cover the drop support line insertion hole 6 and the long hole 9. A fixing bolt 17 is used as a fixing means for the base portion 2, and the fixing bolt 17 inserted from the fixing insertion hole 8 is engaged with a fixing female screw portion 16 provided substantially at the center, and the mounting portion is attached to the base back surface 2 b. 4 is fixed to form a space 15. Since the fixing means uses the fixing bolt 17, a plurality of storage portions 4 having different space depths D can be prepared and selectively used corresponding to various drop support lines 31 having different rigidity.

The attachment and use of the end storage device 1 for the drop support line according to the first embodiment will be described. As shown in FIG. 6 (a), when installing on the right side of the closure 40 when viewed from the connection operator, the mounting bolt 14 of the mounting portion 3 is loosened and fixed to the right-angled portion on the right side of the closure auxiliary rod 41. Only the end storage device 1 can be easily installed. In addition, when installing in the left side of the closure 40, the front and back of the base part 2 shown in FIG. 3 (B) are turned over, the attachment part 3 is rotated 90 degree | times, and it is the same with respect to the left-right-angle part of the closure auxiliary bar 41 Easy to install and fix. Next, when connecting the drop optical cable 30 to the closure side, as shown in FIG. 6 (b), the drop support line 31 from which the tip of the drop optical cable 30 is separated is inserted from the drop support line insertion hole 6, and the long hole 9, the storage of the end portion of the drop support line 31 is completed. The inserted drop support line 31 is not pulled out by the bending force in the space 15 and is sufficiently stretched. When expanding, the existing drop support line 31 does not need to be changed as it is, and the drop support line 31 to be added is inserted into the drop support line insertion hole 6 in the same manner, and the storage is completed easily and in a short time. To do. Further, by loosening the set bolt 17, it is possible to perform proper positioning in the space 15 as compared with the case where the drop support line 31 is simply inserted, and then it can be tightened to obtain a sufficient bending force. In this way, it is possible to adjust the slack in the optimum state when the drop support line 31 is inserted by the set bolt 17. In the figure, reference numeral 37 denotes an optical fiber cable.

Next, another embodiment corresponding to claim 1 which is a superordinate concept of claim 2 will be described. In this embodiment, the number of drop support wire insertion holes 6 is at least one arbitrary number with respect to the base 2 of the first embodiment, and the shape is not limited to a rectangle and various shapes are adopted. . Further, the configuration of the attachment portion 3 is not limited to the substantially hook-shaped arm portion 10, and various shapes are adopted, and the attachment destination is not limited to the right-angle portion of the closure auxiliary rod 41, and can be adapted to any location. . The storage portion 4 is not limited to the space 15 formed by bending the periphery 4a of the plate material of the first embodiment and fixing it with the set bolts 17, but other configurations can be adopted. Although illustration is omitted, for example, the fixing bolt 17 may not be used, and may be fixed using fixing means other than bolts such as pins. As another example, various means for forming a space can be employed, such as forming a space by cutting a part of the base 2 and bending it.

Next, in the second embodiment corresponding to claim 4 in which each configuration is embodied with respect to claim 1, the base back surface 2b on the back side of the drop support line 31 insertion is prevented from being pulled out by the bending force in the space 15. In this configuration, the tip end portion of the drop support line 31 is clamped and fixed. Although not shown, the clamping means has a configuration in which the drop support line 31 is clamped by bolting between the base 2 and the clamping plate, for example. In this case, a more reliable stretching ability is ensured.

Next, 3rd Embodiment corresponding to Claim 5 is not the structure attached with respect to the closure auxiliary | assistant stick | rod 41 like 1st Embodiment, but the attaching part 3 is with respect to the support line 34 between the closure 40 or utility poles. The base 2 can be attached to the side of the closure 40. Although not shown in the drawings, for example, the planar shape and the like of the mounting portion 3 are appropriately selected so that the base portion 2 is disposed at an appropriate position, and the fixing means is also selected and used from existing various means. If it is this 3rd Embodiment, even when the environment where the closure 40 is arrange | positioned is special, the base 2 can be reliably arrange | positioned to the side of the closure 40. FIG.

And although 4th Embodiment corresponding to Claim 6 abbreviate | omits illustration, the accommodating part 4 is formed in the box shape of an elastic material with respect to 1st Embodiment, and is a structure which excludes the set bolt 17. FIG. This box type has an engagement groove at the mouth end for sliding engagement with the upper and lower sides of the base 2 and is attached to the base back 2b on the back side of the surface into which the drop support line 31 is inserted by the elastic force of the storage 4 itself. It is done. With this embodiment, the number of components of the device can be reduced.

The embodiment corresponding to claim 3 is not limited to the use of one and the same base with respect to the embodiment of claim 1 that can be arranged on the left and right sides of the closure 40 by the same base 2, for example, the right side This is a case where a base portion such as a shape corresponding to the arrangement in a special state is also included. It is possible to reliably cope with a special arrangement state with respect to the closure. In this embodiment, as in the second and third embodiments, other embodiments that embody the above-described configurations can be adopted. For this reason, claims 4 and 5 are included as dependent claims of claim 3.

The present invention can be used for a closure that is used when the optical fiber cable is pulled down to the drop optical fiber cable.

It is a front view of the drop support line end part storage device of a 1st embodiment. It is a top view of the drop support line end part storage device of a 1st embodiment. It is a front view of the base part of 1st Embodiment, (i) is a case where it is arrange | positioned on the left side of a closure, and (b) is a case where it is arrange | positioned on the right side. It is the front view which looked at the storage part of 1st Embodiment from the drop support line insertion surface side of the base. It is a section state figure when a drop support line is inserted in the storage part of a 1st embodiment. (A) is a schematic view of a state of being disposed on the left side of the closure, and (b) is an enlarged partial sectional view of the end support device for the drop support line. A is a cross-sectional view of a drop optical fiber cable, and B is a schematic diagram of wiring and end processing of a conventional drop optical fiber cable.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drop support line edge part storage device 2 Base part 3 Attachment part 4 Storage part 5 Engagement part 6 Drop support line insertion hole 7 Attachment female thread part 8 Stop insertion hole 9 Long hole 10 Arm part 11 Attachment hole 12 Locking part 13 Rod Receiving portion 14 Mounting bolt 15 Space 16 Set female screw portion 17 Set bolt 30 Drop optical fiber cable 31 Drop support line 32 Element portion 40 Closure 41 Closure auxiliary rod

Claims (6)

It is a plate material having an engagement portion that engages with a mounting portion described later on one side, and having at least one drop support line insertion hole into which the drop support line can be inserted from the connection work side of the closure on the other side. When flipped to the center of the vertical axis, the engaging portion and the base portion where the drop support line insertion hole is disposed symmetrically,
An attachment portion for fixing the base on the side of the closure;
A housing having a space that prevents the drop support line from coming off due to a bending force generated by bending a tip portion of the drop support line to be inserted on the back surface of the base on the back side of the surface into which the drop support line is inserted. In the department,
An apparatus for storing an end portion of a drop support line, comprising: In the base, the drop support line insertion holes are horizontally long rectangles, and are arranged in four rows in the vertical direction, the engagement portions have mounting female screw portions at the corners, and the stop insertion holes are the drop support holes. Provided in the vicinity of the wire insertion hole, a long hole is provided in the vertical direction of the position where the tip of the drop support line can be confirmed,
The mounting portion includes an arm portion having a substantially right-angled hook shape, a locking portion provided at both end portions of the arm portion in contact with the thickness portion of the base portion, and an attachment provided at a central position of the arm portion. Hole, bent into a shape corresponding to the cross-sectional shape of the closure auxiliary rod, and a bar receiving portion provided in an intermediate portion of the arm portion, inserted into the mounting hole, engaged with the mounting female screw portion, and the base portion It consists of a mounting bolt that is fixed to the closure auxiliary rod,
The storage part has a space inside by bending the periphery of a substantially rectangular shape with four corners cut off, the space depth being provided at a depth at which the bending force of the drop support line can be generated, and the space vertically long Corresponding to the length of the base part, the horizontal width of the space covers the drop support wire insertion hole and the long hole, a female screw part is provided at a substantially center, and a stop bolt is inserted from the stop insertion hole, The space is formed on the back of the base,
The end part accommodating apparatus of the drop support line according to claim 1 characterized by things. A base that has at least one drop support line insertion hole into which a drop support line can be inserted from the connection work side of the closure, and is disposed on the side of the closure;
An attachment for securing the base on the side of the closure;
A storage portion having a space that prevents the drop support line from coming off due to a bending force generated by bending a tip end portion of the drop support line to be inserted on the back surface of the base on the back side of the surface into which the drop support line is inserted. And
An apparatus for storing an end portion of a drop support line, comprising: 4. The drop support line end storage device according to claim 1 or 3, wherein the storage section is configured to clamp and fix the tip end portion of the drop support line by a clamping plate on the back surface of the base. . 4. The drop support line end storage device according to claim 1, wherein the mounting portion is attached to a support line between a closure or a power pole. The storage part is formed in a box shape of an elastic material, has an engaging groove that slide-engages with the upper and lower sides of the base part, and is attached by elastic force on the back surface of the base part. Item 3. An apparatus for storing an end of a drop support line according to Item 2.

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