JPH01185116A - Structure at cable lead-in section - Google Patents

Abstract

PURPOSE:To improve space factor and workability, by arranging a tubular metal mesh body around a cable lead-in hole made through a cabinet rack and shield connecting the tubular body with the external conductor of cable. CONSTITUTION:A tubular metal mesh body 10 is arranged around a cable lead-in hole 11 made through a cabinet rack 1. One end of the tubular body 10 is electrically connected with the circumferential section of the cable lead-in hole 11 through a fixing metal 9. Then a cable 3 is inserted into the tubular body 10 and the open end of the tubular body 10 is fastened through a metal band 12 so as to shield joint the external conductor 31 of the cable with the tubular body 10. Since an earth board is not required, space factor is improved and the efficiency of cable lead-in work is improved.

Description

[Detailed Description of the Invention] [Summary] Regarding the structure of the cable introduction part of a cabinet rack that houses electronic equipment, the cable introduction part is designed to simultaneously prevent rats and cooling air from entering the cabinet rack from the cable introduction hole and provide electromagnetic shielding. In order to improve the space factor of a cabinet rack that accommodates electronic equipment, a cylindrical body made of metal mesh is provided with one end fixed to the periphery of the cable introduction hole in a grounded state. The other end of the cylindrical body is tightened and configured to be shielded and connected to the outer conductor of the cable inserted into the cylindrical body.

[Industrial application field]

The present invention relates to a structure of a cable introduction part of a cabinet rack that houses electronic equipment.

In consideration of the fact that the number of cables introduced into a cabinet rack that accommodates communication electronic equipment increases due to the addition or modification of communication devices, the cable introduction holes provided in the cabinet rack are relatively large. However, when a small number of cables are introduced into this cable introduction hole, a gap is created, and mice and cooling air can enter through this gap and cause trouble to the equipment, so this cable introduction hole and the cable are sealed with a funnel-shaped purse string member. However, conventional drawstring members use flame-retardant cloth to prevent mice and cooling air from entering. However, this alone cannot provide electromagnetic shielding, so it is desired to be able to prevent the intrusion of mice and cooling air while also providing electromagnetic shielding.

[Conventional technology]

3 and 4 are diagrams for explaining the structure of a conventional cable introduction section, with FIG. 3 being a side sectional view of the main part, and FIG. 4 being a perspective view of the main part.

In the figure, the cabinet rack 1 is mounted on a double floor 7 with a pedestal 6.
A ground plate 5 is attached to the cabinet rack 1, and a plurality of connected cable support fittings 4 are attached to the ground plate 5. The bottom of the cabinet rack 1 and the double floor 7 have a cable introduction hole 11 for introducing the cable 3 and a cable introduction hole 7 on the double floor.
2 are provided respectively, and this cable introduction hole 11
The cable introduction hole 72 of the double floor is made larger in consideration of an increase in the number of cables when equipment is expanded or repaired.

Then, to introduce the cable 3 into the cabinet rack 1, the cable 3 is raised up from the cable introduction hole 72 of the double floor provided in the double floor 7 and inserted into the cable introduction hole 11. To cool the device, cooling air 8 is blown onto the floor from the air circulation holes 71 of the double floor 7 and sent into the room where the device is placed. This cooling air is supplied through suction holes (not shown) provided in each of the parts of the equipment that are installed indoors that require cooling.
It is taken in from the factory and cooled.

This is because if the cooling air 8 is directly introduced into the cabinet rack 1 from under the double floor 7, a large amount of cooling air 8 will be introduced into the part near the blower, but the amount introduced into the cabinet rack 1 in the far part will be small. It is what is done.

Therefore, when the cooling air 8 enters the cabinet rack 1 through the gap in the cable introduction hole 11 where the cable 3 is introduced, the amount of cooling air 8 flowing from the air distribution hole 71 onto the double floor 7 decreases, and the amount of air introduced into each device decreases. becomes unbalanced and the cooling effect decreases.

When a small number of cables 3 are introduced, cable introduction hole 1
Since a gap is formed in the cable introduction hole 11 and the cable 3, a purse string member 2 made of flame-retardant cloth and having a funnel shape in cross section is inserted between the cable introduction hole 11 and the cable 3.
The large opening is brought into contact with the periphery of the cable introduction hole 11 and fixed by screwing with a tightening screw 13 via the fixing fitting 9, and the small opening is sealed and fixed to the cable 3 with a metal band 12.

Furthermore, in order to provide electromagnetic shielding for the device, the external insulator of the cable 3 corresponding to the ground plate 5 is removed to expose the external conductor 31, which is brought into contact with the ground plate 5 and fixed by screwing with the cable support fitting 4. ing.

[Problem that the invention seeks to solve]

The conventional structure of the cable introduction section described above has a problem in that the space factor and work efficiency of the cable introduction section are poor because the sealing section using the flame-retardant purse string member and the electromagnetic shielding section are separate.

[Means for solving problems]

The present invention provides a structure of a cable introduction part that solves the above problems and improves the space factor and work efficiency.

That is, in the cable introduction part of a cabinet rank that accommodates electronic equipment, a cylindrical body made of metal mesh is provided, one end of which is fixed to the periphery of the cable introduction hole in a grounded state, and the other end of the cylindrical body is tightened. This problem is solved by making a shield connection to the outer conductor of the cable that is inserted inside.

[For production]

The structure of the cable introduction section allows electromagnetic shielding by forming the cylindrical body with a metal mesh, and also facilitates the cable introduction work.

〔Example〕

1 and 2 are diagrams for explaining one embodiment of the present invention. FIG. 1 is a side sectional view of the main part, FIG. 2 is a perspective view of the main part, and FIG.
The same reference numerals are given to the same parts as in FIG. 4 and FIG.

In the figure, the cabinet rack 1 is mounted on a double floor 7 with a pedestal 6.
A cable introduction hole 11 for introducing the cable 3 and a double-floor cable introduction hole 72 are provided at the bottom and the double floor 7 of the cabinet rack 1, respectively. The cable introduction hole 11 and the cable introduction hole 72 of the double floor are made larger to accommodate an increase in the number of cables when the device is expanded or repaired.

Then, to introduce the cable 3 into the cabinet rack 1, the cable 3 is raised up from the cable introduction hole 72 of the double floor provided in the double floor 7 and inserted into the cable introduction hole 11.

Therefore, when a small number of cables 3 are introduced, a gap is created in the cable introduction hole 11, and a mouse can enter through this gap.

In order to prevent the intrusion of cooling air, a large opening of a cylindrical body 10 made of metal mesh and having a funnel-like cross section is brought into contact with the periphery of the cable introduction hole 11 between the cable introduction hole 11 and the cable 3. Tighten the screw 13 through the fixing bracket 9.
The small opening is sealed and fixed with a metal band 12 to the exposed portion of the external conductor 31 of the cable 3 after removing the external insulator in advance.

Furthermore, the surface of this cylindrical body 10 is coated with a resin to prevent the cooling air 8 from entering.
Another woven fabric, sheet, etc. may also be used on the outside.

In this embodiment, the cable 3 is explained as having two cables, but it is not limited to two cables, and may be one cable or a plurality of cables such as three or more cables.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, by using a metal mesh as the cylindrical body, a ground plate is not required, so the space factor of the cable introduction section is improved, and the efficiency of the cable introduction work is improved. This is extremely effective in improving implementation efficiency.

[Brief explanation of the drawing]

1 and 2 are diagrams for explaining one embodiment of the present invention, in which FIG. 1 is a side sectional view of the main part, FIG. 2 is a perspective view of the main part, and FIGS. 3 and 4 are the conventional FIG. 3 is a side sectional view of the main part, and FIG. 4 is a perspective view of the main part. In the figure, 1 is a cabinet rank, 2 is a drawstring member,
3 is a cable, 4 is a cable support fitting, 5 is a ground plate,
6 is the frame, 7 is the double floor, 8 is the cooling air, 9 is the fixing metal fittings,
10 is a cylindrical body, 11 is a cable insertion hole, 12 is a metal band, 13 is a tightening screw, 31 is an external conductor, 71 is an air circulation hole, 72 is a double floor cable Q9 - Main part perspective view of the present invention Figure 2

Claims (1)

[Claims] In a cable introduction part of a cabinet rack that accommodates electronic equipment, a cylindrical body (10) made of metal mesh is provided, one end of which is fixed to the periphery of the cable introduction hole (11) in a grounded state, A structure of a cable introduction part, characterized in that the other end of the cylindrical body (10) is tightened and connected to the outer conductor (31) of the cable (3) inserted therein with a shield.