JPH0439235Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is an airtight cable that is used when storing and transporting cables that may absorb moisture, such as pipe-shaped OF cables (POF cables). Concerning the provision of drums.

[Conventional technology]

Conventionally, for cable cores of POF cables that need to be prevented from absorbing moisture during storage, transportation, and installation, circles have been installed on the inside of the collar plate on both sides of the cable drum that winds the cable core. Surface bonding in which shelf boards are provided along the circumferential direction, both ends of a flexible sheet such as a rubber sheet are adhered to the outer peripheral surface of both shelf boards, and then a tightening band such as a stay wire is tightened from above. The section is kept airtight, and the upper part of the winding drum is sealed by wrapping it with a flexible sheet to form an airtight chamber containing the cable, and the airtight chamber is filled with inert gas to prevent sealing failure. An airtight drum structure was proposed. (For example, see Utility Model Publication No. 51-18458.) [Problem to be solved by the invention] As mentioned above, in the conventional airtight drum, the drum is kept airtight by a flexible sheet. Although it is easy to seal and unpack, the flexible sheet is easily damaged by external trauma, and requires great care when handling during storage, transportation, and installation work. If the filling gas pressure is too high, the flexible sheet will swell outward, affecting the airtightness of the bonded area with the shelf board, and there is also the fear that the sheet may come off the shelf board. Ta.

In order to prevent the flexible sheet from bulging due to gas pressure from inside, the sheet was tightened with a metal band, etc., but there was a risk that the sheet could be cut if the metal band, etc. was tightened too much. Moreover, if the metal band is insufficiently tightened, there is a risk that the filled gas may leak, and in any case, handling is extremely troublesome.

In addition, when a rubber sheet is used as a flexible sheet, it is easily affected by the outside temperature, and even if the pressure is appropriate at night, the internal pressure increases as the temperature rises during the day, causing abnormalities in the rubber sheet. There was a risk that the material would bulge, causing unexpected damage or a significant drop in airtightness.

This invention solves the above-mentioned conventional problems, and
The object is to provide this type of airtight drum that is highly reliable in airtightness without impairing sealing and opening operations.

[Means for solving problems]

To achieve the above object, the airtight drum of the present invention uses a shaped steel material as an airtight maintenance member that is installed across shelf boards provided along the circumference inside the collar plate on both sides of the cable winding drum. A plurality of the shaped steel members are connected in the circumferential direction, and a resin material integrally molded on the outer surface of the shaped steel material is pressed into contact with the shelf surface of the shelf board through an elastic body, making it airtight. The fixed and adjacent shaped steel members are airtightly connected to each other by resin materials integrally molded to each other.

The resin material may have a fin that extends from the inner corner edge of the side surface to be brought into close contact and presses against the inner corner edge of the side surface of the adjacent section steel material while being displaced.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 is a metal cable drum, in which disk-shaped collar plates 3, 3 are provided on both sides of a cylindrical winding drum 2, and shelf plates 4, 4 are provided inside the collar plates 3, 3. is provided so as to extend along the circumferential direction. POF cable core 5 has flange plates 4, 4
It is wound around the outer circumferential surface of the winding drum 2 in between.

Elastic bodies 6, 6 such as unvulcanized rubber sheets are adhered to the surfaces of the shelf portions 4a, 4a extending along the circumferential direction of the shelf boards 4, 4. The airtight maintenance member 7 has an elastic body 6 having a width sufficient to straddle the flange plates 4, and has both ends attached to the shelf portion of the flange plates.
6, and by wrapping a metal band 8 such as a staple tape from the outside, the airtight retaining member 7 is pressed against the elastic body 6 to form a partition that airtightly communicates between the collar plates 3, 3. .

FIGS. 2 to 4 show specific examples of such an airtight maintaining member 7. That is, a shaped steel material 7 such as a lip channel steel is used as the main body of the airtight maintenance member, and a resin material 9 made of an elastic material such as vulcanized rubber is integrally molded onto the outer surface of the shaped steel material 7 to provide an airtight seal. .

Thus, the shaped steel material 7 has both ends connected to the shelf portion 4a,
It is placed on the surface of the elastic bodies 6, 6 on the elastic body 4a, and is provided in the same manner for a plurality of pieces, and the side surfaces of the resin materials 9, 9, which are molded integrally with themselves, are in contact with each other in the adjacent steel sections 7, 7. Then, by tightening the metal band 8 from the outside, the resin material 9 integrally molded to itself at both ends is pressed into contact with the elastic bodies 6, 6 and airtightly connected, and the adjacent steel sections are The side surfaces of the resin materials 9, 9 are pressed against each other between the resin members 7, 7, and the resin members 9, 9 are connected to each other in an airtight manner.

The resin material 9 has a fin 9a extending from the corner edge of the side surface and the inward surface. It hits the corner edge of the side surface of the resin material and the surface facing inward, and can be crimped while being displaced inward. Such fins 9a increase the adhesion force between the adjacent steel sections 7, 7, and the internal pressure of the filling gas generates a pressure contact force on the inward surface of the opposing resin material, contributing to further improvement of the sealing effect. It is something to do.

[Effect of idea]

According to the airtight drum of the present invention as described above, since a shaped steel material is used as the main body of the airtight member for sealing the upper part of the cable winding drum, there is no problem even if the band is tightly wound from the outside. There is no chance of damage, and its own bending rigidity is high, so it will not deform even if the internal pressure increases due to the gas filling. Furthermore, between both ends of the shaped steel and the shelf of the drum-side flange plate, the resin material molded into the shaped steel itself and the elastic body provided on the surface of the shelf are in contact with each other, and the adjacent shaped steel Since the resin materials integrally molded are in contact with each other, by tightening from the outside, the resin materials and the elastic bodies as well as the resin materials are brought into pressure contact with each other with their own elastic deformation, ensuring a secure connection. Can form an airtight wall,
Moreover, the steel sections can be easily separated as units by simply unfastening them, and the sealing and unsealing operations are no inferior to those of conventional flexible sheets. As a result, the intended purpose of providing this type of airtight drum that is highly reliable in terms of airtightness without impairing the sealing and unsealing workability is fully achieved.

Additionally, by making the main body of the airtight maintenance member made of a shaped steel material that is resistant to external damage, it is possible in some cases to eliminate the need for a cover to prevent damage, which is normally provided on the outside of the airtightness maintenance member. It has great practical value.

[Brief explanation of the drawing]

The attached drawings show an embodiment of the airtight drum according to the present invention, and FIG. 1 is a partially cutaway front view of the drum as a whole, and FIG. 2 is a cross-sectional view showing the airtightness of the drum from the side. FIG. 3 is an explanatory cross-sectional view showing a specific example of the air-tight maintaining member, and FIG. 4 is an explanatory cross-sectional view showing the state of the drum air-tight maintaining portion from the front. In the symbols, 1 is a cable drum, 2 is a winding drum, 3 is a collar plate, 4 is a shelf board, 4a is a shelf part, and 5 is a
POF cable core, 6 is elastic body, 7 is section steel material,
8 is a tightening band, 9 is a resin material, and 9a is a fin.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A plurality of shaped steel members are used as airtight retaining members to be installed across shelf boards provided along the circumferential direction inside the collar plate on both sides of the cable winding drum. The shape steel shall be connected in the circumferential direction, and a resin material integrally molded on the outer surface of the shape steel material is pressed into contact with the shelf surface of the shelf board through an elastic body and fixed airtightly, and An airtight drum characterized in that adjacent shaped steel members are airtightly connected to each other by resin materials integrally molded to each other. (2) The resin material has a fin that extends from the inner corner edge of the side surface to be brought into close contact and presses against the inner corner edge of the side surface of the adjacent section steel material while being displaced. Airtight drum.