JP3055859U - Connection trough to underground handhole for wiring - Google Patents

Abstract

(57) [Summary] [PROBLEMS] The present invention relates to a connection trough to a handhole buried underground for wiring. For example, a handhole and a groove block are used for routing communication cables such as electric wires, telephone lines, optical fibers, etc. underground. The connection trough connected between them is formed in a flat trumpet shape, and the accommodation space on the introduction side and the exit side for the communication cable handhole is expanded to increase the degree of freedom and improve the workability of the routing process and connection . SOLUTION: The present invention arranges a communication cable 3 such as an electric wire between a groove block 5 continuously buried in the ground and a handhole 2 for introducing or leading out the communication cable from the groove block. trough body 1 to be connected, the inner cross-section S ₁ is small diameter doorway 1a on one side, the other side inner cross section S
₂ is formed in the shape of a flat trumpet provided with a large and large entrance / exit 1b, so that the degree of freedom in routing and connecting the communication cable to the handhole is improved.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a connection trough to a handhole buried underground for wiring, for example, a connection trough connected between a handhole and a groove block for routing communication cables such as electric wires, telephone lines, optical fibers, etc. underground. By forming a flat trumpet shape, the accommodation space on the introduction side and the exit side for the communication cable handhole is expanded to increase the degree of freedom in routing the communication cable and improve the workability of the routing process and connection. did.

[0002]

[Prior art]

Conventionally, as a method of laying communication cables such as electric wires or telephone lines, an aerial overhead wire method of building a number of power poles and steel towers and erection on these power poles in the air, and a concrete groove embedded in the ground There was an underground burial method to be routed inside the block. Of these, the aerial overhead wire method requires a lot of materials, dedicated land, and facilities to construct telephone poles and steel towers. In addition, the construction was large-scale and construction such as electric poles and electric wires appeared on the ground. Therefore, it was not suitable for construction in a large city. On the other hand, underground burial methods only require the use of inexpensive groove blocks and handholes, which are manufactured in large quantities at factories, and do not require many materials and equipment. In addition, since the structure is buried underground and is not exposed to the ground and does not require any special land on the ground, it can be used for other purposes on the ground, has no external appearance, and has no wiring. The rope work had the advantage of being relatively easy to do. The underground burying methods include, for example, those shown in FIGS. That is, a large number of concrete-made groove blocks a which are continuously embedded in the underground G, and the lid plate b is detachably covered with the upper opening, and a desired interval between the groove blocks a. A communication cable e such as an electric wire or a telephone line or an optical fiber is routed inside a box-shaped handhole d having a lid c. The communication cable e is supported in the groove block a at a desired interval by casting the concrete f in a substantially piled state and solidifying it in the groove block a. By the way, the handhole d is provided with a connector g for connecting the communication cables e to each other, a connection g such as a coupling, an amplifier for amplifying a carrier wave flowing through the communication cable e, and a wiring of the communication cable e. The direction is changed or a branch is made. Further, as the electric wire and telephone line used for the communication cable e, a covered wire whose conductor is covered with an insulating material is usually used, and the optical fiber is covered with a corrugated tube or the like. Therefore, it has a role such as absorbing different elasticity between summer and winter. From the viewpoint of protecting the communication cable e with answer these demands, the introduction side I or derived small-diameter cylindrical portion h ₁ in O communication cable e for Handoho Lumpur d consisting larger cylindrical portion h ₂ Metropolitan double pipe The communication cable e was introduced into the hand hole d from the preceding groove block a through the protective sleeve tube h of the structure, and was led out from the hand hole d to the subsequent groove block a.

[0003]

[Problems to be solved by the invention]

 In the above-mentioned conventional method of burying a communication cable underground shown in FIGS. ₁ And large diameter cylinder h_TwoThe communication cable e was introduced into the handhole d from the preceding groove block a using the double sleeved protective sleeve tube h, and was led out of the handhole d to the subsequent groove block a. . Therefore, when the communication cable e is routed within the groove block a connected to the handhole d, the space for accommodating the groove block a with respect to the communication cable e is narrow, and there is no flexibility in the work. On the introduction side I and the exit side O of the communication cable e with respect to the handhole d, the insertion side of the communication cable e into the protective sleeve tube h has several communication cables e bundled together. On the side close to the handhole d of the protective sleeve tube h, the communication cable e using connection parts such as connectors and couplings is connected to the connection part g of the communication cables e and the amplifier, the wiring direction is changed, The communication cables e need to be routed in a distributed state with a distance in the radial direction in order to branch and to reliably and finely absorb the different elasticity between summer and winter. For this reason, it takes a lot of labor and time to route the communication cable e on the introduction side I or the exit side O with respect to the handhole d, and requires a skilled technique, resulting in low work efficiency and inefficiency. Was. The present invention solves the above-mentioned conventional disadvantages, expands the accommodation space for communication cables, guarantees the freedom of routing work on the introductory side or outgoing side, does not require much labor and time, and is unskilled. In this case, it was possible to efficiently route communication cables.

[0004]

[Means for Solving the Problems]

 Claim 1 of the present invention is a groove block in which a large number are continuously buried in the ground, and a cable or a communication cable such as a telephone line or an optical fiber is routed in the ground, and a desired interval between the groove blocks. The communication trough is connected to the handhole that is connected to the handhole that is connected to the handhole that leads the communication cable from the groove block of the preceding stage that is connected or leads the communication cable to the subsequent groove block. A small-diameter doorway with a small inner cross section was provided on one side of the cable entry or exit side, and a large-diameter entrance / exit with a large internal section was provided on the other end of the communication cable introduction or exit side to the handhole. Means of being formed in a flat trumpet shape is adopted.

[0005] Further, claim 2 of the present invention adopts a means in claim 1 in which the trough main body is formed in an inner cross section in which the protective sleeve tube inserted into the communication cable is housed.

According to a third aspect of the present invention, in any one of the first and second aspects, the trough body has a substantially U-shaped front surface having an inner cross section substantially matching the outer shape of the large-diameter doorway. A means was used that was connected to the handhole via a recessed trough receiving material attached to the desired position on the side surface of the hole.

According to a fourth aspect of the present invention, in the first aspect, the trough main body is fixed to a hand hole on one side and to a groove block on the other side by using a tie band and a bolt at appropriate plural positions. It was adopted.

[0008] According to a fifth aspect of the present invention, in the third aspect, the trough receiving member can be selected and attached to a desired portion facing the thin portion formed on the side surface around the hand hole so as to be breakable by hitting. It was adopted.

[0009]

[Embodiment of the invention]

Hereinafter, a specific example of an embodiment of the present invention will be described with reference to the drawings. FIGS. 1 to 9 show an embodiment of the present invention, in which the same parts as those in FIGS. 10 and 11 are denoted by the same reference numerals. 1 is a trough body, the trough body 1 the inner cross-section S ₁ small diameter doorway 1 a provided on one side of the introduction side I or discharge side O of the communication cable 3 for hand hole 2, hand hole 2 flat flaring the inlet side I or the other end of the lead-out side O of the communication cable 3 provided with the inner cross section S ₂ is greater large diameter entrance 1b as protective sleeve tube 4 for inserting the communication cable 3 is accommodated for The upper opening is covered with a lid 1c so that it can be fitted and removed. Further, on the outer surface of the right and left of the trough body 1, the trough body 1 by weight by forming a thin portion 1d surrounded by the longitudinal ribs R ₁ and transverse ribs R ₂ as shown in FIG. 6, transportation and construction The structure is simple and lightweight, but the structure is robust. In order to lay the trough body 1, a large number are continuously buried in the underground G, and a concrete groove block 5 for laying the communication cable 3 in the underground G, and a desired gap between the groove blocks 5. The communication cable 3 is connected every K ₁ and is connected to the handhole 2 for introducing the communication cable 3 from the preceding groove block 5 or leading the communication cable 3 to the subsequent groove block 5.

The trough main body 1 has a plate-shaped tie band 6 as shown in FIG. 9 and bolts provided on the left and right sides of the tie band 6 with one side facing the hand hole 2 and the other side facing the groove block 5. Inserts 6b, 6b provided in the holes 6a, 6a and the handhole 2, one end of the trough main body 1, and the other end of the trough main body 1 and the groove block 5; bolts 7, 7 screwed into 6b, 6b are used. It is appropriately fixed at a plurality of locations.

The trough body 1 has an inner cross section S that substantially matches the outer shape of the large-diameter doorway 1b. _Three The large-diameter doorway 1b is connected to the handhole 2 through a trough receiving member 8 of a drop-down type which is formed in a substantially U-shaped front surface and is attached to a desired position on the side surface of the handhole 2. The trough receiving member 8 is formed of steel or stainless steel, and is formed on the side surface around the handhole 2 so as to be breakable by hitting._TwoIt can be installed by selecting the desired location facing the. The trough receiving member 8 is formed in a substantially U-shaped drop-down form in order to connect the large-diameter entrance / exit 1b of the trough main body 1 to the hand hole 2, and to attach the trough main body 1 to the hand hole 2. The purpose of this is to secure the temporary positioning with respect to the main fixing using the tie band 6 and the bolt 7 and to protect the connection portion to the trough main body 1 after the mounting. In order to attach the trough receiving member 8 to the hand hole 2, for example, a plurality of inserts 8 a protruding from the back surface of the trough receiving member 8 as appropriate are fitted into mounting holes 2 c provided at corresponding positions of the hand hole 2. Above, the trough receiving member 8 is attached by screwing the bolt 8b into the insert 8a.

The handhole 2 is made of concrete and is formed in a substantially box shape composed of an upper box 2A and a lower bottom 2B. The reason why the handhole 2 is divided into the upper box portion 2A and the lower bottom portion 2B is to ensure quick and reliable transportability and workability. And on the upper surface of the upper box portion 2A projecting a cylindrical entrance 2A ₁ the lid 9 Ru is Hikanmuri possible Hamada', able to make the blow hammer for example to the side of the periphery of the upper box portion 2A the thin portion 2A ₂ is formed which can be destroyed by.

The communication cable 3 is, for example, an electric wire, a telephone line, an optical fiber, or the like. In the groove block 5 covered with the lid 5A, a plurality of communication cables 3, usually about 5 to 10 cables, are bundled as one bundle. As the electric wire or telephone line, a conductor coated with an insulating material such as synthetic resin vinyl or rubber is used. The optical fiber is covered with a corrugated tube and protected.

The protective sleeve tube 4 is formed in a double tube structure composed of a small-diameter cylindrical portion 4A and a large-diameter cylindrical portion 4B formed of a synthetic resin or metal, and has a communication cable 3 bundled therein. Is inserted.

One embodiment of the present invention has the above-described structure, and has a groove block 5 continuously embedded in the underground G, and a handhole 2 provided at a desired interval K ₁ between the groove blocks 5. In order to connect the trough body 1 having a flat trumpet shape, a trough receiving member 8 having a substantially U-shaped front surface made of steel or stainless steel is attached to a desired side surface around the handhole 2.

This attachment is performed by a thin portion 2 A formed on the side surface around the handhole 2._TwoThe desired thin portion 2A formed on the side surface corresponding to the introduction side I of the communication cable 3 routed from the groove block 5 and the lead-out side O of the communication cable 3 routed from the handhole 2 _Two , 2A_TwoIs destroyed by the impact of a hammer, and a hole P₁, P _Two And this hole P₁, P_TwoAnd one end of the trough body 1 is attached.

To attach the trough body 1 to the handhole 2, first, a trough receiving member 8 formed in a front U-shape by steel or stainless steel is provided with desired thin portions 2 A ₂ , 2 A _{2 on} the side surface of the hand hole _2. Face the holes P ₁ and P ₂ , and mount them so as to surround the holes P ₁ and P ₂ . In order to attach the trough receiving member 8 to the hand hole 2, a plurality of inserts 8a provided on the back surface of the trough receiving member 8 are inserted into mounting holes 2c provided at corresponding positions of the hand hole 2. The trough receiving member 8 is attached to the handhole 2 by screwing the bolt 8b into the insert 8a.

Next, the introduction side I or the exit side O having a large inner cross section S ₂ for introducing or leading out the communication cable 3 of the trough body 1 having a flat trumpet shape into the front U-shaped trough receiving material 8. One end is fitted by dropping. Thus, since one end is embraced from the surrounding (left and right side surfaces and bottom surface) by dips into the trough receiving material 8 having a larger diameter entrance 1b having a large internal cross section S ₂ of the trough body 1, hand hole The positioning of the mounting position of the trough body 1 with respect to the handhole 2 can be performed quickly and reliably, and the trough receiving unit is used for the work of connecting the trough body 1 to the handhole 2 until the trough is fixed using a tie band 6 and a bolt 7, which will be described later. Temporarily fix with material 8. At the same time the other end having a inlet side I or doorway 1a of a small diameter inner section S ₁ of the discharge side O to the communication cable 3 in the trough body 1, shock if the end face of the groove blocks 5,5 which is embedded in the ground G Is done.

Thereafter, the tie band 6 is connected to the abutment point between the handhole 2 and one end of the large-diameter doorway 1b of the trough main body 1 and the other end of the small-diameter doorway 1a of the trough main body 1 to the groove block 5. A predetermined number of portions are brought into contact with each other so as to straddle the abutting portion. After that, when the bolt 7 is screwed into the bolt holes 6a, 6a provided on the left and right sides of the tie band 6, the bolt 7 is corresponding to the bolt holes 6a, 6a. One end of the trough body 1 is screwed into inserts 6b, 6b; 6b, 6b provided at one end and the other end of the trough body 1 and the groove block 5 via bolts 7, 7 via a tie band 6. And the other end are connected to the handhole 2 and the trough body 1, respectively.

As described above, the trough main body 1 is provided with a small-diameter entrance / exit 1 a having a small inner cross section S ₁ on one side connected to the groove block 5, and the introduction side I of the communication cable 3 with respect to the handhole 2. since the other end of the discharge side O is formed in a planar horn-shaped having a doorway 1b of large diameter larger inner cross section S _2, the communication cable 3, which is the order of 5 to 10 present in a bundle diameter tubular portion 4A Is introduced into the handhole 2 from the front groove block 5 using the protective sleeve tube 4 having a double tube structure of the inner tube and the large-diameter cylindrical portion 4B, and is led out from the handhole 2 to the rear groove block 5. In this case, the accommodation space becomes wider than before, and the protection sleeve tube 4 can be easily inserted into the holes P ₁ and P ₂ of the handhole ₂ , so that the degree of freedom in the work of laying the communication cable 3 is ensured. .

On the introduction side I and the exit side O of the communication cable 3 with respect to the handhole 2, on the side of the protective sleeve tube 4 near the handhole 2, the communication cable 3 in which 5 to 10 wires are bundled together is and quickly into the hand hole 2 in a dispersed state at a distance in a radial direction within the inner cross-section S ₂ is large housing space is wide large diameter entrance 1b of the trough body 1 can be efficiently laid, a skilled technique Routing work is improved without the need. For this reason, the communication cables 3 can be easily and reliably connected to each other via the connection portion g such as a connector or a coupling in the handhole 2, or can be connected to the amplifier. In addition, it is possible to reliably and finely absorb the elasticity that differs between summer and winter.

[0022]

[Effect of the invention]

 As described above, according to the present invention, the communication cable is routed underground, and the communication cable is introduced from the preceding groove block connected to the groove block at a desired interval or to the subsequent groove block. The trough main body connected between the communication hole and the handhole that leads out the communication cable has an entrance with a small inner cross section on one side of the communication cable introduction side or the lead-out side for the handhole. The other end of the inlet or outlet side of the cable is formed in a flat trumpet shape with a large-diameter doorway with a large inner section, so that the accommodation space for the communication cable is expanded and the inlet or outlet side The flexibility of the routing work is ensured, so that much labor and time are not required, and even an unskilled person can efficiently perform the communication cable routing and connection work.

[Brief description of the drawings]

FIG. 1 is an enlarged vertical cross-sectional view showing a construction state of an embodiment of a connection trough to a wiring underground handhole of the present invention.

FIG. 2 is an enlarged horizontal plan view of the same.

FIG. 3 is an explanatory enlarged side view showing a state in which a trough receiving member is attached to a handhole.

FIG. 4 is a plan view illustratively showing an example of a laying state of a connection trough and a groove block used in the present embodiment.

FIG. 5 is an enlarged plan view showing the connection trough used in the present embodiment in a state where the lid is cut in half and covered with a cover.

FIG. 6 is an enlarged side view showing a state where a lid is covered on a connection trough used in the present embodiment.

FIG. 7 is an enlarged front view showing a state where a lid is covered on a connection trough used in the present embodiment.

FIG. 8 is an enlarged front view showing a state in which the trough main body is held using the trough receiving member.

FIG. 9 is an enlarged side view showing an example of a tie band used when the trough body used in the present embodiment is connected to the handhole and the groove block.

FIG. 10 is an enlarged vertical sectional view showing an example of a conventional method of burying a communication cable in the ground.

FIG. 11 is an enlarged cross-sectional view of a communication cable routed in the groove block.

[Explanation of symbols]

1 trough body 1a doorway 1b doorway 2 hand hole 3 the communication cable 4 protective sleeve 4A small diameter cylinder portion 4B larger cylindrical section 6 tie bands 8 trough receiving material S ₁ in cross-section S ₂ in section I introduce side O discharge side

Claims (5)

[Utility model registration claims] 1. A groove block in which a large number are continuously buried in the ground to route electric cables or communication cables such as telephone lines and optical fibers in the ground, and connected at desired intervals between the groove blocks to a front stage. A communication cable is introduced from the groove block or a connection trough is connected to a handhole connected to a handhole that leads the communication cable to the subsequent groove block. Alternatively, a small-diameter entrance with a small internal section is provided on one side of the exit side, and a large-diameter entrance with a large internal section is provided on the other end of the communication cable introduction side or exit side to the handhole. A connection trough to an underground wiring handhole, which has been made. 2. The trough according to claim 1, wherein the trough body is formed in an inner cross section in which a protective sleeve tube into which a communication cable is inserted is accommodated. 3. The trough main body has a substantially U-shaped front surface having an inner cross section substantially matching the outer shape of the large-diameter doorway, and is provided with a trough receiving member of a drop type attached to a desired position on a side surface of the handhole. The connection trough to the underground wiring handhole according to claim 1, wherein the connection trough is connected to the handhole. 4. The trough body is fixed to a hand hole on one side and to a groove block on the other side by using a tie band and a bolt at appropriate locations.
The connection trough to the underground hand hole for wiring described in 5. 5. The underground wiring for wiring according to claim 3, wherein the trough receiving material is attached by selecting a desired portion facing a thin-walled portion formed on a side surface around the hand hole so as to be breakable by hitting. Connection trough to embedded handhole.