JPH0322513B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a cable-built-in strut used mainly as a strut for electrical equipment installed high on the road.

[Conventional technology]

In recent years, due to demands for urban beautification and traffic safety, there has been a trend to use underground cables or surface-buried cables instead of overhead distribution lines. Therefore, cables must be installed underground or from the surface layer for electrical equipment such as switches, low-voltage branch boxes, and even street lights. On the other hand, when these electrical devices are placed on the road, they obstruct the passage of passersby and vehicles, and they also block visibility, which is not desirable in terms of traffic safety. In addition, electrical equipment such as power distribution towers that stand upright on the streets spoil the aesthetic appearance of the city. Therefore, a housing for electrical equipment installed high on the road was developed, in which the housing containing these electrical equipment is raised to a position higher than a person's height and supported with a support.

In the case of these electric devices installed high on the road, as described above, a cable raised from underground or on the ground layer is passed through the support and connected to the electric device in the casing above the support. Furthermore, the present invention is not limited to these, and the same applies to street lights and the like.

[Problem that the invention seeks to solve]

However, since these struts are small diameter tubes with a length of 2 m or more, it is extremely difficult and time-consuming to pass the cables through these struts. Moreover, the cables must be passed through the pipe before installing the struts. Furthermore, since a plurality of cables are close to each other within this support, the permissible current is small, and there is a risk that a cable accident will spread to other cables. Furthermore, it is not possible to secure the cable within the column. Furthermore, since the support pillars are exposed to rainwater, exhaust gas, etc., they have the disadvantage of being susceptible to corrosion.

[Means to solve the problem]

This invention was made in view of these points, and consists of installing a central column above the ground that supports electrical equipment, etc., and supporting cables raised from underground or from the ground surface at appropriate locations on this central column. At the same time, connect one end of it to the above-mentioned electrical equipment, etc. along the center pillar,
A cover is provided to surround and cover these above-ground central pillars and cables, and this cover is bent or divided into several parts in the longitudinal direction of the central pillar, so that they can be mutually locked and fixed. .

[Effect]

In this invention, a cable is raised from underground or on the ground layer, passed through the inside of the column, and in order to connect one end of the cable to electrical equipment, etc. on the top of the column, the cover is removed from the side and the cable is placed outside the center column. Cables are fixed to the center column at regular intervals, and a cover is hung from the side to cover the center column and the cables.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.
Figures 1 to 4 show the basic structure of the above-ground part of this invention, in which a central pillar 2 is erected on the ground surface 1, and this central pillar 2 is made of steel such as H-shaped steel as shown in Figure 3. . Auxiliary pieces 3, 3, 3, 3 are protruded from the four ends of the cross section of the center column 2, and cables 4, 4 are provided on the outside of the four sides of the center column 2 located between the auxiliary pieces 3. , 4, 4 are attached. Around the center column 2, two covers 5, 5' each having a circular cross section cover the center column 2 so that the outer ends of the auxiliary pieces 3 contact the inner circumferential wall.
The covers 5, 5' have one end connected to each other by a hinge 6, and the other ends abutted against each other.
It forms a. And these covers 5,5
are provided in several sets in the vertical direction along the central column 2, and each set of covers 5, 5' forms a stepped part 5b, 5'b (not shown) tapering inward at the upper end. , which locks the lower ends of a pair of upper covers 5, 5'.
In this way, the central column 2 and the cables 4, 4, 4, 4 are covered by several sets of covers 5, 5'.
A fixing rail 7, which has a cross section in which both ends of the cross section are bent inward and a groove is formed in the center of one side, connects the bent pieces 5a, 5'a of the matching ends of each pair of covers 5, 5' from the top. It is inserted into its own groove. An equipment mount 8 is fixed to the upper end of the central column 2, and an electrical equipment casing 9 such as a low-voltage branch box is mounted on the equipment mount 8.

The cables 4, 4, 4, 4 each rise along the center column 2, and are fixed to the center column 2 at regular intervals. Figures 5 and 6 show the support structure of the cables 4, 4, 4, 4 to the central column 2. At the support points of the cable 4, the auxiliary pieces 3, 3, 3, 3 are fixed to a certain width, respectively. A notch is provided at the four ends of the central column 2 at the notch.
10, 10 are respectively provided, and each of these two protrusions 1
Cable brackets 11, 11 are fixed between 0 and 10, and these cable brackets 11, 11 connect two sets of three-phase cables 4, 4 to rubber spacer 1.
2 and are respectively tightened and fixed. Also H
Two sets of protruding columns 1 from the outer surface of both sides of the central column 2 of the shaped steel
3, 13, 13, 13 are provided protrudingly, and each set of protruding pillars 1
Cable brackets 14, 14 are fixed between 3 and 13, respectively, and these cable brackets 14,
At 14, two sets of three-phase cables 4, 4 are tightened and fixed via a rubber spacer 15.

7 to 9 show the upper part of this embodiment with the electrical equipment casing 9 removed, and the plates 16, 16 are fixed across the upper end of the center column 2. The outer peripheral cross section of is rectangular, and the above-mentioned equipment mounting base 8
A rectangular cylindrical body 17 is fitted and fixed in a hole bored in the bottom plate of the cylindrical body, and is fitted onto the outer periphery of the central column 2 having the plate bodies 16, 16, and is fixed with bolts and nuts 18. An appropriate number of ribs 19 are provided between the outside of the center column 2 in the mount 8 and the inner wall of the mount 8. An inner circumferential edge 20 is provided on the upper surface of the mounting base 8, and a housing 9 for electrical equipment is placed on this inner circumferential edge 20, and bolts 21 for fixing the housing 9 are provided. Further, an annular body 22 is provided on the lower surface of the bottom plate of the mounting base 8 to cover and lock the upper ends of the uppermost set of covers 5, 5'. Further, the upper ends of the four sets of cables 4, 4, 4, 4 are introduced into the device mounting base 8 through appropriate gaps 23 formed inside and outside the center column 2, as shown in FIG. Connected to electrical equipment inside.

FIGS. 10 and 11 show the lower underground part of this embodiment, in which the handhole body 24 is buried underground, and the upper end of this handhole body 24 is provided with two-piece lids 25, 25. These lid bodies 25,
25 is fixed with bolts 26. A semicircular hole 27 is bored in the center of the abutting edges of these lids 25, 25, and a semicircular arc in cross section is fixed at the lower part to the inner periphery of each semicircular hole 27, and the upper end protrudes above the ground surface 1. A piece 28 is provided, and when these lid bodies 25, 25 are butted together, a central hole is formed by the semicircular holes 27, 27, and from this central hole, the semicircular arc pieces 28,
A tube formed by 28 protrudes. The lower end of the central column 2 is inserted into the handhole main body 24 through this tube protruding above the ground surface 1, and is fixed on the bottom surface 24a inside the handhole main body 24 via a suitable support reinforcing body 29. There is. Further, a stepped portion 28a,
28a is formed, and the lowermost set of covers 5,
5' is received by the stepped portions 28a, 28a,
It is locked.

The above is the first embodiment of the present invention, and an underground cable (not shown) is inserted into the handhole body 24 through the notch hole on the side surface of the handhole body 24, and the semicircular arc pieces of the lid bodies 25, 25 28, 28, the cable 4 is pulled out along the center column 2, and the cable 4 is fixed to the center column 2 with the cable brackets 11 or 14 at regular intervals as described above.
It passes through the equipment mounting base 8 and is led into the electrical equipment housing 9, and is connected to the electrical equipment within the housing 9. After the cable 4 is fixed to the center column 2, several sets of covers 5, 5' are sequentially placed around the cable 4 and the center column 2 from bottom to top, and the bent pieces of each cover 5, 5' are covered. 5a and 5'a are butted against each other, and one fixing rail 7 is fitted onto these bent pieces 5a and 5'a from above, thereby fixing several sets of covers 5 and 5', respectively.

The center column 2 of the present invention is not limited to the first embodiment, but may be made of any suitable material and shape, such as a steel column or a concrete column.

Figures 12A to 12E show other examples of the pillars of the present invention, particularly the central pillar 2, and the central pillar 2' in Figure 12 is I
A large number of compartments 30 surrounded by two partition walls and a cover are formed by joining steel with a V-shaped cross section on both sides of the steel material of the mold, and the central column 2' shown in Figure B is fixed with two angle members back to back. Four compartments 30 are provided, and the central column 2' in Figure C is provided with partition walls radially from the outer periphery of a small diameter cylinder to provide a large number of compartments 30. A large number of partitions 30 are provided, and these are surrounded by covers 5 and 5' having a rectangular cross section. A set of three-phase cables 4 is housed in each compartment 30. Further, Fig. E shows a three-phase set of cables each covered with a shield tube 31.

Further, instead of the first embodiment, the set of covers 5, 5' may be of a split type instead of using hinges, in which case both ends of each cover 5, 5' are secured by fixing rails 7. But that's fine. Further, in the above embodiment, one fixing rail 7 is used for several sets of covers 5, 5', but the fixing rail 7 is not limited to this, and may be provided for each set of covers 5, 5'.

In addition, the auxiliary pieces 3 in the first embodiment were provided by welding to the four corners of the center column, but instead of these, as shown in FIGS. The four corner edges of the center column 2 are held together by a large number of clamping pieces 3'a, 3'a... formed by cutting vertically at regular intervals on one edge of the four corners of the center column 2. Clamped auxiliary pieces 3', 3', 3',
3', and the other end edge of each of these auxiliary pieces 3' may be covered with a packing 51. In this case, when the covers 5, 5' are placed over the outer periphery of the central column 2 from which these auxiliary pieces 3' protrude from all sides, the packing 51 comes into contact with the inner circumferential wall of the covers 5, 5'.
and fix the open ends of the covers 5, 5' with the fixing rails 7. As a result, the covers 5 and 5' do not wobble, and the gaskets 5
1 has a buffering effect that absorbs this and also has a soundproofing effect.

FIGS. 15 and 16 show a structure for mounting a round device on the upper end of a column according to the present invention. A disk mount 32 for the round device is fixed to the upper end of the center column 2, and this disk mount 32 is provided with a plurality of large and small holes 33 for cable insertion, and a locking ring 34 is provided on the lower surface of the disk mounting base 32 for locking the upper end of the cover 5, 5' of the uppermost set. .

Figures 17 to 19 show mounting base 3 for large equipment.
5, this mount 35 has almost the same structure as the mount 8 of the first embodiment, and a mount 35 for large equipment is mounted on the upper end of the central pillars 2, 2 that stand upright at a constant interval. It is something that is present.

In the first embodiment, the lower end of the center column 2 was supported in a hand hole buried underground.
The figures and FIG. 21 show an embodiment in which the lower end of the center column 2 is directly buried in the soil. That is, central pillar 2
The lower end of the pillar 2 is inserted into the soil and passes through the center hole of a circular base 36 buried in the soil, and the central column 2 is fixed to this circular base 36 by a supporting reinforcing body 37. Then, as shown in FIG. 21, angle members 38,
38, 38, 38 are respectively protruded, and each angle member 3
8 is provided with an underground pipe 39 whose inner peripheral surface abuts, the outer peripheral surface of this underground pipe 39 and each of the above-mentioned angle members 38 are fixed with appropriate bolts and nuts 40, and the A stepped portion 39a is provided at the upper end, and the lower ends of the lowermost set of covers 5, 5' are placed and locked on this stepped portion 39a. In this embodiment as well, the underground cable or the cable on the surface layer is connected to the underground pipe 3.
9 and to enter the covers 5 and 5', the underground tube body 39 is split into two pieces, and after passing the cable through them, they are butted and fixed to each angle member 38.

FIGS. 22 and 23 show an example of a concrete embedment structure for the center column 2, in which the upper part of the concrete embedment 41 provided in the ground protrudes above the ground surface 1, and the concrete embedment 41 is Insert and fix the lower end of the center column 2 into the center hole 42, cover the area of the concrete embedment 41 protruding above the ground surface 1 and the area around the ground with a protective tube 43, and narrow the upper end of this protective tube 43. A stepped portion 43a is provided, and the lowermost set of covers 5, 5' is placed on this stepped portion 43a.
It is locked. In the case of this embodiment, the center column 2 is not directly buried in the soil, but is covered with a concrete embedment 41 from the ground level to the ground, so there is no fear that the center column 2 will be corroded by rainwater or the like. Also, the circular base 41a of this concrete embedment 41
A plurality of radial cable insertion grooves 44 are provided from the top surface to the upper outer surface, and cables buried in the ground or on the surface layer are inserted into the cable insertion grooves 44 at 41 places made of concrete and raised up. The protection tube 43 also rises as the protection tube 43 splits into two pieces and bolts and nuts 4 are butted against each other.
It is fixed at 5.

Figure 24 shows a street light 46 attached to the upper end of the pole of this invention.
An example is shown in which a signboard or road sign 47 is hung.

Furthermore, FIGS. 25 and 26 show an embodiment in which electrical equipment such as a transformer is attached to the upper part of the support column of the present invention via a band, and a cap 48 for band tightening is placed on the upper end of the center column 2, and a bolt 49 is attached to the upper end of the center column 2. The cap 48 is fixed to the cap 48, and has a stepped portion 48a on the outer periphery of its lower end for locking the upper end of the uppermost pair of covers 5, 5'.

In this case, the cable attached to the center column 2 enters the cap 48 from the beginning of the lower end of the cap 48,
A cable is pulled out to the outside of the support column from a knockout hole 50 provided on the outer periphery of the cap 48, and is connected to an electrical device outside the support support.

In addition, in this invention, as shown in FIGS. 1 to 3, it is also possible to provide a large number of protrusions on the outer circumferential surface of the covers 5, 5' to prevent stickers from being pasted. There is no need to attach the provided sticker prevention board.

〔Effect of the invention〕

In this invention, the cables buried underground or on the ground surface are applied to the center column from the side of the center column, the cables are fixed to the center column at regular intervals, and then the cover is hung from the side. The work is extremely simple. There is no need to pass a cable through the support from one end of the support made of a small-diameter tube to the other as in the conventional case. Furthermore, cables can be added or replaced for repairs after the pole is installed. At that time, if the cover is removed from the side, the cable and center column are exposed, and the cable can be removed from the center column laterally, making the work extremely easy. Further, in this invention, the cable can be arranged around the central column, and compartments and shielded tubes can be provided, so the cable is divided, so the allowable current can be increased, and in the event of a cable accident, it will not spread to other cables.
In addition, the cable can be fixed to the central column and will not shift within the column. Furthermore, since the central column is covered with a cover, it is not exposed to rainwater, exhaust gas, etc., and has the advantage of being less likely to corrode.

[Brief explanation of the drawing]

FIG. 1 is a front view of the first embodiment of the invention, FIG. 2 is a side view of the same, FIG. 3 is a sectional view taken along line A-A in FIG. 2, and FIG. 4 shows the main parts of FIG. 1. FIG. 5 is an enlarged cross-sectional view of the support column according to the first embodiment of the present invention, FIG. 6 is an enlarged longitudinal cross-sectional view of the same, and FIG. 8 is a front view with the same part omitted; FIG. 9 is a side view with the same part omitted; FIG. 10 is a front sectional view showing the underground part of the first embodiment of the present invention; Figure 11 is the first
FIG. 12 is a sectional view taken along the line B-B in FIG. 0, and FIGS.
FIG. 3 is a cross-sectional view showing another embodiment of the auxiliary piece of the present invention, FIG. 14 is a vertical cross-sectional view of the same part, and FIG. 15 is a top view of the present invention when the electrical equipment used in the present invention is round. A partially cutaway side view showing the structure, FIG. 16 is a plan view of the same, FIG. 17 is a front view showing the upper structure of this invention when the electrical equipment used in this invention is large, and FIG. 18 is a side view of the same. , FIG. 19 is the same plan view,
FIG. 20 is a front view showing an underground portion of another embodiment of the present invention, FIG. 21 is a sectional view taken along the line C-C of FIG. 20, and FIG. A front view showing the parts, Figure 23 is the same plan view, and Figure 23 is the same plan view.
Fig. 4 is a top side view of the invention applied to a street light, Fig. 25 is a top side view showing an embodiment in which the electrical equipment of the invention is attached to the outside of a support via a band, and Fig. 26 is a plan view of the same. It is. In the figure, 2 is the center column, 4 is the cable, and 5, 5'
is a cover, 7 is a fixing rail, 8 is a mounting base for equipment, 9 is a housing for electrical equipment, 11 and 14 are cable brackets, 12 and 15 are rubber spacers, 24
25 is the hand hole body, 25 is the lid body, 28 is the semicircular arc piece, 30 is the compartment, 31 is the shield pipe, 36 is the circular base, 38 is the angle material, 39 is the underground pipe body, 41
43 is a protection pipe, 44 is a cable insertion structure, and 48 is a cap for mounting with a band.

Claims (1)

[Claims] 1. A central pillar supporting electrical equipment, etc. on the upper part is installed on the ground, and a cable raised from underground or from the ground layer is supported at appropriate points on this central pillar, and one end of the cable is connected to the electrical equipment mentioned above. etc., connect to
A cover is provided to surround and cover these central pillars and cables on the ground, and this cover is bent or divided into a plurality of pieces in the longitudinal direction of the central pillar, so that these parts can be mutually locked and fixed. Built-in cable support.