JP3504504B2 - Cable trough lid fixing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete trough for accommodating a power and communication cable inside a trough body, and more particularly to a cover for closing an opening of the trough body. It relates to a fixing device. 2. Description of the Related Art Conventionally, concrete cable troughs have been laid such that they are exposed in railways, roads, and facilities, or are partially buried in the ground. Since the closing lid is made of a concrete material, it is only covered by its own weight on the trough body. However, since the laying area is wide and there are many unmanned places, there is a risk that the lid may be removed due to mischief. For this reason, a lid fixing device 21 as shown in FIG. 2 has been proposed. The lid fixing device 21 includes two metal fittings 22 having a substantially U-shaped cross section.
Although the vertical parts were welded to each other using this, the reinforcing plate 23 covering the entire bottom plate of the two metal fittings 22 was welded in this state, but two metal fittings 22 having a substantially U-shaped cross section were used. Since the vertical portions are welded to each other, the plate thickness becomes two sheets, and there is a problem that the gap between the trough bodies becomes large and a problem that the tip of the connected lid is shifted from the trough body. Further, since the respective parts of the lid fixing device 21 are welded, the cost is increased. [0003] The present invention has been made to solve the above-mentioned conventional problems and to provide a cable trough lid fixing device in which the trough lid cannot be easily removed. It is. [0004] The present invention has been made to solve the above-mentioned problems, and comprises a trough body having a substantially U-shaped cross section and an upper opening, and a lid for closing the upper opening. In a cable trough lid fixing device, a single plate is bent
A horizontally long main body plate that is processed and abuts against the side wall of the trough main body 3
6 to one end of the trough body 3 in the longitudinal side wall end.
A substantially U-shaped bent piece 7 is provided, and the other end is provided.
Attach the mounting plate 9 via the vertical plate 8 that rises upward.
The girder main body 5 and the lid 4 are formed so as to protrude beyond the width thereof.
The lid 4 is pressed from above, and the mounting plate 9 of the main body 5 is fixed to both ends.
It is composed of a holding plate 10 that is
Two sets of the main bodies 5, 5 are hooked to the ends of both side walls
And fix the mounting plate 9 of the main body 5 to both ends of the holding plate 10.
It is an object of the present invention to provide a cable trough lid fixing device characterized in that the above-mentioned operation is performed. Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing a connecting method of concrete troughs connected by a lid fixing device of the present invention, and 1 is a concrete-made housing for storing power and communication cables and protecting the cables. Cable trough,
A trough body 3 having a substantially U-shaped cross section and having an upper surface opening 2 and a lid 4 for closing the upper surface opening 2 are connected and laid at longitudinal ends. Reference numeral 5 denotes a main body of the lid fixing device, which is manufactured by bending a single plate. The main body 5 is provided with a substantially U-shaped bent piece portion 7 which is hooked to a longitudinal side wall end of the trough main body 3 at one end of a horizontally long main body plate portion 6 which comes into contact with an outer surface of a side wall of the trough main body 3. ,
At the other end, a mounting plate portion 9 having a screw hole extending at a right angle to the side wall of the trough main body 3 is provided via a vertical plate portion 8 rising upward. Reference numeral 10 denotes a pressing plate of a lid fixing device for pressing the lid 4 of the trough from above. The holding plate 10 is formed so as to cross the width direction of the lid 4, and a screw insertion hole through which a screw 13 to be screwed into the mounting plate portion 9 having a screw hole of the main body 5 of the lid fixing device is inserted at both ends. Is provided. At the approximate center of the holding plate 10, an iron bar 1 used for holding a plurality of lids 4 at one time.
One engaging step 12 is formed. The iron bar 11 has a length of, for example, four or five lids 4. The iron bar 11 is fixed at an appropriate position by a lid fixing device, so that the iron bar 11 holds down the center of each lid 4 in the longitudinal direction. Is what you can do. In order to fix the lid 4 to the trough main body 3, two sets of the main bodies 5, 5 are fitted and hooked at both ends of the trough main body 3 in the longitudinal direction. Then, after covering the trough main body 3 with the cover 4, the screw insertion holes of the holding plate 10 are fixed to the screw holes of the mounting plate portions 9 of the main bodies 5 and 5 with the matching screws 13.
When a force is applied to remove the lid 4 after the fixing, the mounting plate 9 of the main body 5 to which the holding plate 10 is fixed acts so as to be lifted upward. 7
Is fixed, a rotating moment acts on the main body 5 about the bent piece 7. However, since the bent piece portion 7 is sandwiched between the side wall end portions of the trough main body 3, the main body 5 does not rotate and the holding plate 10 does not lift. If a hexagon socket head bolt or the like is used for the fixing screw 13 of the lid fixing device, the operation cannot be performed without a special tool, so that the reliability is improved. When an iron bar is used, first, two main bodies 5, 5 are attached to both ends of the trough main body 3 in the longitudinal direction located at one end side of the iron rod 11 having a length corresponding to several lids 4. Hook in sets. Similarly, two sets of the main bodies 5 and 5 are hooked on the end portions on both side walls in the longitudinal direction of the trough main body 3 located on the distal end side of the iron bar 11. After the cover 4 is covered, the iron bar 11 is arranged at the center in the longitudinal direction on each cover 4, and the holding plate 10 is attached from above to correspond to the main bodies 5, 5, 5, 5 on both sides. is there. The location and interval of the lid fixing device can be freely set depending on the length of the iron bar 11, and since there is no problem if the iron bar 11 is not extended, a steel wire or the like may be used. [0009] The lid fixing device constructed as described above is obtained by bending a single plate material, so that the weight is reduced, welding is not required, and the corrosion resistance is improved. In addition, since the lid fixing device does not enter the gap between the lids and the lid and the trough main body are laid in alignment, the problem that the gap between the trough main bodies becomes large is solved, Is difficult to enter. At the same time, the problem that the tip of the connected lid is shifted from the trough main body has also been solved. Further, when an iron bar is used, the lid fixing devices may be provided every few lids depending on the length of the iron bar, so that the number of the lid fixing devices may be small, and the disposing work may be facilitated. As is apparent from the above description, the present invention provides a cable trough lid comprising a trough body having a substantially U-shaped cross section and an upper surface opening, and a lid for closing the upper surface opening. In the fixing device, a single plate is bent to form a trough
A tiger is attached to one end of the horizontally long main body plate portion 6 which contacts the side wall of the body
A substantially U-shaped hook that is caught on the longitudinal side wall end of the main body 3
A bent piece 7 is provided and the other end is raised upward.
A main body 5 provided with a mounting plate 9 via a vertical plate 8
4 and press the lid 4 from above.
Holding plate to which the mounting plate portion 9 of the main body 5 is fixed at both ends
10; end portions of both side walls in the longitudinal direction of the trough body 3
, Two sets of the main bodies 5 and 5 are hooked,
Are fixed to both ends of the holding plate 10.
This is a lid fixing device having an extremely simple structure and an easy laying operation, and can prevent a person other than the person concerned from easily opening the lid of the trough due to mischief or the like. Accordingly, the present invention is extremely significant in that it contributes to the development of the industry as a lid fixing device that solves the conventional problems. [0011]

[Brief description of the drawings] FIG. 1 is a perspective view showing an embodiment of the present invention. FIG. 2 is a perspective view showing a conventional example. [Explanation of symbols] 3 Trough body 4 Lid 5 Body 6 Body plate 7 Folding piece 8 Vertical board 9 Mounting plate 10 Holding plate 11 horizontal bar 12 Step for engagement 13 screws

Claims (1)

1. A cable trough cover fixing device comprising a trough body 3 having a substantially U-shaped cross section and having an upper surface opening 2, and a lid 4 for closing the upper surface opening 2. In, bending one board
A horizontally long main body plate that is processed and abuts against the side wall of the trough main body 3
6 to one end of the trough body 3 in the longitudinal side wall end.
A substantially U-shaped bent piece 7 is provided, and the other end is provided.
Attach the mounting plate 9 via the vertical plate 8 that rises upward.
The girder main body 5 and the lid 4 are formed so as to protrude beyond the width thereof.
The lid 4 is pressed from above, and the mounting plate 9 of the main body 5 is fixed to both ends.
It is composed of a holding plate 10 that is
Two sets of the main bodies 5, 5 are hooked to the ends of both side walls
And fix the mounting plate 9 of the main body 5 to both ends of the holding plate 10.
A lid fixing device for a cable trough, characterized in that :