JPH0416582Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is used when various cables such as telephone lines, power lines, optical fibers, and related incidental equipment are consolidated and buried underground. It is related to the cab system.

[Prior Art] Recently, research and development of cab systems for consolidating and accommodating cables such as telephone lines and power lines in a relatively narrow underground space has been promoted. This type of cab system consists of a groove-shaped cab body consisting of a plurality of troughs arranged at the top with an opening, and a cap with the top end located on the ground surface. A device has been developed that is equipped with a lid body that is attached to the lid body.

[Problems to be Solved by the Invention] Incidentally, in the conventional cab body, all adjacent troughs are rigidly connected to each other by a band-shaped connecting fitting or the like. That is, in the conventional art, both ends of the connecting fittings are fixed to adjacent troughs via bolts or the like, and the troughs are joined together so that they cannot move relative to each other.

However, when troughs are rigidly joined together in this way, if there is a misalignment between adjacent troughs, it often takes time and effort to insert bolts, etc. into both ends of the connecting fittings and fix them. .

Additionally, if the troughs are rigidly connected to each other, large stress will be applied to the joint in the event of an earthquake, etc., and the connecting fittings and the fixed parts of the connecting fittings will be destroyed, resulting in large areas between the troughs. This tends to cause a problem of misalignment.

The present invention aims to effectively solve these problems.

[Means for Solving the Problems] The present invention employs the following configuration in order to achieve the above objectives.

That is, the cab system according to the present invention includes a groove-shaped cab body formed by connecting a plurality of troughs each having an open top surface through a connecting fitting, and a cab body with an upper end located on the ground surface. A cab system comprising a lid attached to an opening, wherein one end of the connecting fitting is fixed to one of the adjacent troughs using a single bolt, and the other end is fixed to one of the adjacent troughs using a single bolt. A tapered notch hole is provided perpendicularly to the connecting direction of the trough and one end thereof is opened at one side edge of the connecting metal fitting, and a long hole is formed orthogonal to this notch hole, and the other side of the connecting metal fitting is It is characterized in that it is fixed to the other of the adjacent troughs by a bolt whose end side is positioned in the elongated hole through the notch hole.

[Operation] With such a configuration, when connecting adjacent troughs, one end of the connecting fitting is temporarily fixed to one of the troughs, and the other end of the connecting fitting is rotated, and the other end of the adjacent trough is connected. The connecting fitting can be hung by the taper guiding action of the notch hole. That is,
By rotating the other end of the connecting fitting with the bolt temporarily secured to the other side of the trough, the bolt is guided into the elongated hole through the notch. Thereafter, the trough connection is completed by tightening the temporarily fastened bolts.

After the connecting fittings are fixed and the troughs are connected, if vibration is applied to each trough due to an earthquake or the like, at least the other end of the connecting fitting will slide with respect to the corresponding trough due to the elongated hole. That is, since the bolt that fixes the other end of the connecting fitting to the other side of the trough is located within the elongated hole of the connecting fitting, when a large force is applied, the connecting fitting and the bolt will This results in relative displacement in the longitudinal direction of the elongated hole against the frictional force caused by tightening. Therefore, the troughs connected by the connecting fittings can move differently in the horizontal direction within a certain range. Therefore, a large stress is not concentratedly applied to the joints formed by the connecting fittings, and problems such as breakage of the connecting fittings and their surrounding parts and large misalignment between the troughs are less likely to occur.

[Example] Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 6.

As shown in Figures 1 to 3, this cab system consists of a cab body 1 buried near the ground surface.
and a lid 2 mounted on the upper end opening of the cab body 1.

The cab body 1 connects a plurality of troughs 3 with a metal fitting 4.
It is a groove-shaped thing connected by. trough 3
is made of precast and has a reinforced concrete structure, with a bottom plate 5 and both side walls 6 integrally molded, and a recess 7 for forming a cable outlet, a cable 8, etc. are installed in the side wall 6. A shelf 9 and the like are provided for storage. Furthermore, an engaging convex portion 3b is provided on the inner edge side of one joint end surface 3a of each trough 3, and an engaging recess 3d is formed on the inner edge side of the other joint end surface 3c. The engaging protrusions 3b are engaged with the engaging recesses 3d of adjacent troughs 3 and arranged in sequence.

The connecting fitting 4 connects to the side wall 6 of the adjacent trough 3.
It is a strip-shaped thing attached to the outer surface of the
The a side is supported by one of the adjacent troughs 3, and the other end 4b side is slidably connected to the other adjacent trough 3. In detail,
As shown in FIGS. 4 to 6, the connecting fitting 4 is in the form of a band plate, and a circular bolt insertion hole 10 is bored at one end 4a of the connecting fitting 4. An insert nut 11 is embedded in the outer surface of the side wall 6 of one of the corresponding troughs 3.
One end 4a of the connecting fitting 4 is fixed to one of the troughs 3 by fixing a bolt 12 inserted through the bolt insertion hole 10 to the insert nut 11.

On the other hand, a notch hole 1 is provided on the other end 4b side of the connecting fitting 4.
3 and a long hole 14 perpendicular to the cutout hole 13. The notch hole 13 has a narrow tapered shape extending in a direction perpendicular to the connecting direction of the trough 3, and has one wide end 13a opening at one side edge of the connecting fitting 4. The long hole 1 is provided at the other end of the deep narrow shape and extends in the longitudinal direction of the cab body 1 (the direction in which the trough 3 is connected) and is perpendicular to the notch hole 13.
4 is drilled.

The longitudinal dimension of the elongated hole 14 is set to a value within a range in which the engagement protrusion 3b does not fall off from the engagement recess 3d even if the connecting fitting 4 slides with respect to the other trough 3.

On the outer surface side of the side wall 6 of the other trough 3 corresponding to the intersection 15 of the notch hole 13 and the elongated hole 14,
An insert nut 16 is buried therein, and the other end 4b of the connecting fitting 4 is slidably fixed to the other adjacent trough 3 by a bolt 17 fixed to the insert nut 16.
Between the head of the bolt 17 and the connecting fitting 4,
A positioning tool 18 is interposed to prevent upward movement of the connecting fitting 4 with respect to the bolt 17 at a position where the bolt 17 engages with the intersection portion 15.

As shown in FIGS. 5 and 6, the positioning tool 18 is shaped like a flat washer, and has a bent portion 18a at one end that engages with the other side edge of the connecting metal fitting 4.
A bolt hole 18b through which the bolt 17 passes is formed at the other end.

The troughs 3 are connected to each other using the connecting fittings 4 and the like as described above in the following manner.
First, as shown in FIG.
The a side is temporarily fixed rotatably to one trough 3 with a bolt 12, and a bolt 17 with a positioning tool 18 attached is screwed into an insert nut 16 of the other trough 3. Then, the connecting fitting 4 is rotated around the bolt 12, and the other end 4b is rotated.
The side is inserted into the gap between the outer surface of the other trough 3 and the positioning tool 18. Thereby, the bolt 17 is press-fitted into the notch hole 13 of the connecting fitting 4, and the connecting fitting 4 is moved to the intersection of the notched hole 13 and the elongated hole 14 by the guiding action of the tapered inner edge 13b of the notched hole 13. 15 and is locked to the bolt 17.

Next, the upper bent portion 1 of the positioning tool 18
8a to the other side edge of the connecting fitting 4 (upper edge on the other end 4b side)
After this, the bolt 12 on one end 4a side and the bolt 17 on the other end 4b side are tightened to fix the connecting fitting 4 to the side wall 6 of the trough 3, thereby connecting adjacent troughs 3 to each other.

In addition, although the above description was about the joint portion between a specific trough 3 and the adjacent trough 3, in this embodiment, a similar joint structure is adopted for all other joint portions. Therefore,
When focusing on each trough 3, connecting fittings 4 are slidably connected to the outer surfaces of both side walls 6 at the joint end on the left side in the figure, and on the outer surfaces of both side walls 6 at the joint end on the right side in the figure. The connecting fitting 4 is fixed.

On the other hand, the lid body 2 is a plate-like piece in which both edges are engaged with locking steps 1a provided on the inner edge side of the upper opening surface of the cab body 1, and the lid body 2 has a first lid block 20 and a second lid block. The lid blocks 21 are arranged alternately.
The first lid block 20 is a plate-shaped block made of precast and has a reinforced concrete structure, and both joint end faces 20a thereof are formed diagonally upward. The second lid block 21 is a plate-shaped block made of precast and has a reinforced concrete structure, and its joint end surface 21a is formed diagonally downward. By arranging the first lid blocks 20 and the second lid blocks 21 alternately, the joint end surfaces 20a and 21a are brought into contact with each other.

With such a configuration, when connecting adjacent troughs 3, by rotating the other end 4b side of the connecting fitting 4 provided with the notch hole 13, etc., the other end 4b side can be connected to the adjacent troughs 3. The connecting fitting 4 can be easily attached by locking it to the bolt 17 attached to the trough 3.
can be installed between adjacent troughs 3.

If vibration is applied to each trough 3 due to an earthquake or the like after the connecting fitting 4 is fixed, the bolt 17 on the other end 4b side of the connecting fitting 4 will move inside the long hole 14 of the connecting fitting 4. It will slide within the range corresponding to the dimensions. Therefore, the troughs 3 connected by the connecting fitting 4 can make different movements in the horizontal direction within a range in which the engagement protrusion 3b does not come off from the engagement recess 3d. Therefore, a large stress is not concentratedly applied to the joint by the connecting fittings 4, and it is possible to effectively eliminate the problem of the joint being destroyed and causing a large positional shift between the troughs 3. Therefore, damage caused by earthquakes can be effectively suppressed, and high seismic performance can be obtained.

In addition, in the above embodiment, the case where all the troughs were slidably joined by connecting fittings was explained, but the present invention is not necessarily limited to such a case. The connection may be made using a slidable connecting fitting, and the other joint portions may be rigidly connected using a connecting fitting that is fixed at both ends.

Alternatively, the connecting fittings are not limited to being attached to the outer surface of the trough, but may be attached to the inner surface of the trough, or may have a structure in which one end is buried in concrete, as long as it does not depart from the spirit of the present invention. Various modifications are possible.

Further, the positioning tool for preventing upward movement of the connecting fitting with respect to the bolt may be, for example, the one shown in FIG. 7. Such positioning tool 18
Here, a notch-shaped bolt hole 18b is formed on the other end side parallel to the bent portion 18a that is engaged with the other side edge of the connecting fitting 4. Then, after locking the other end 4b side of the connecting fitting 4 to the bolt 17,
Insert the bolt 17 into the bolt hole 18 by sliding it from the other end 4b side of the connecting fitting 4 between the connecting fitting 4 and the hexagonal nut 17a screwed onto the bolt 17.
The bent portion 18a may be held by the other side edge of the connecting fitting 4.

Note that the same reference numerals are given to the parts corresponding to those in the above embodiment, and the explanation thereof will be omitted.

Further, the lid body is not limited to a drop-lid type that is attached to the inside of the upper end opening of the cab body, but may be a hanging-lid type that is attached with the side surface exposed to the side surface of the cab body.

[Effects of the invention] In the present invention, the connecting fitting that connects the troughs to each other is provided with a cutout hole perpendicular to the connecting direction of the troughs and an elongated hole extending in the connecting direction. It is possible to provide a cab system that not only reduces the work involved in connecting the troughs, but also allows the troughs to be connected flexibly and exhibits high seismic performance.

[Brief explanation of the drawing]

1 to 6 show an embodiment of the present invention,
Figure 1 is a side view, Figure 2 is the − in Figure 1.
A line sectional view, FIG. 3 is an exploded perspective view, FIG. 4 is a front view of the connecting fitting, FIG. 5 is a sectional view showing the connecting part, FIG. 6 is a perspective view showing the connection procedure using the connecting fitting, and FIG. 7 FIG. 3 is a perspective view showing another embodiment. 1... Cab body, 1a... Locking step, 2...
Lid body, 3...Trough, 3a...Joint end surface, 3b...
...Engagement convex portion, 3c...Joining end surface, 3d...Engagement recess, 4...Connection fitting, 4a...One end, 4b...Other end, 5...Bottom plate, 6...Side wall, 7...Concave recess Part, 8
... Cable, 9 ... Shelf, 10 ... Bolt insertion hole, 11 ... Insert nut bolt, 12 ...
Bolt, 13...notch hole, 13a...wide end, 13b...tapered inner edge, 14...long hole, 1
5...Intersection part, 16...Insert nut, 1
7... Bolt, 18... Positioning tool, 18a...
Bent part, 18b... Bolt hole, 20... First
Lid block, 20a... joint end surface, 21... second lid block, 21a... joint end surface, 17a...
... Rokkaku Natsuto.

Claims (1)

[Claims for Utility Model Registration] A groove-shaped cab body formed by connecting a plurality of troughs with open tops via connecting fittings, and a cab body with the top end located on the ground surface and the top opening of the cab body. A cab system comprising a lid with a lid attached, one end of the connecting fitting being fixed to one of the adjacent troughs using a single bolt, and the other end of the trough being fixed to one of the adjacent troughs. A tapered notch hole is provided perpendicularly to the connecting direction and has one end opened at one side edge of the connecting fitting, and a long hole is formed orthogonally to the notch hole, and the other end side of the connecting fitting is formed. A cab system, characterized in that the cab system is fixed to the other of the adjacent troughs by a bolt positioned in the elongated hole through the notch hole.