JPH028403Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention is a waterproofing device at the entrance to a building of a waveguide that connects a parabolic antenna and a communication device used in microwave band telecommunications, for example. Regarding improvements.

[Prior art and its drawbacks] Conventionally, when a waveguide is brought into a building, a synthetic rubber packing that roughly fits the waveguide is inserted into the flanged pipe at the entrance installed on the roof of the building. A simple method is to fit this packing onto the above flange, place a presser plate on its top surface, tighten the bolts, and then apply waterproofing from the outside of the joint between the waveguide and the packing using self-fusing tape or vinyl tape. was being carried out.

However, this method has the disadvantage that rainwater collects on flat areas due to rain, snow, temperature changes, etc., causing cracks in the packing, resulting in a loss of waterproof properties.

[Purpose of the invention] The present invention has been made in view of the above-mentioned circumstances, and its purpose is to provide a waterproofing device for a waveguide inlet that improves waterproofness by a simple means.

[Key Points of the Invention] The waterproofing device of the present invention includes a flange of a flanged pipe protruding from the end face of the waveguide inlet, and packing having an inner diameter that matches the outer shape of the waveguide inserted into the inlet. The first waveguide is tightened with bolts, the waveguide is fixed to the inlet, and then waterproofed.
a waterproofing part, and a joint part formed to have a substantially conical shape and having a space inside, and tightly enveloping the waveguide at the upper end above the first waterproofing part. and a lower end surface is in contact with the inlet mounting surface, a vertically divided part is formed in the side wall, and a joint piece is provided on the surface opposite to this vertically divided part, and these joint pieces are connected by a plurality of bolts and nuts. The device is characterized by comprising: a waterproof cover; and a second waterproofing section formed by waterproofing the outside of the joint between the upper end of the waterproof cover and the waveguide; This prevents the parts from being directly exposed to the outside air and improves waterproofness.

[Embodiment of the invention] An embodiment of the invention will be described below with reference to the drawings. In FIG. 1, a waveguide 13 from a parabolic antenna is led into a lead-in port 12 provided, for example, on the roof of a building 11, and connected to a communication device or the like. That is, a flange pipe 15 with a flange 14 provided at the upper end is embedded and fixed in the building 11, and a rubber packing 17 matching the outer shape of the waveguide 13 is inserted between the flange 14 of the flange pipe 15 and the holding plate 16. , the waveguide 13 is fixed to the inlet 12 by tightening bolts 18 and nuts 19. Furthermore, a waterproofing section 20 using self-fusing tape, vinyl tape, or the like is provided at the position shown by the dotted line on the upper and outer side of this fixing section.

Furthermore, this waterproofing section 20 has a waterproof cover 21.
covered by. The waterproof cover 21 is made of synthetic rubber and is formed into a substantially conical shape and has a hollow portion 22 inside. This waterproof cover 21 is provided with a joint 23 at a position of about 20 cm above the waterproofing section 20, and the joint 23 tightly covers the outer periphery of the waveguide 13. Also,
The lower end surface of this waterproof cover 21 is the inlet mounting surface 24.
We are starting to come into contact with people. Waterproof cover 21
The side surface thereof is vertically divided, and opposing joining pieces 25a and 25b are provided along both end surfaces of the vertically divided portion. These joint pieces 25a, 25b
are connected by a plurality of bolts 27 and nuts 28 with a presser plate 26 interposed therebetween, as shown in FIG. 2, so that the waterproof cover 21 can be attached to the waveguide 13.

Further, a compound 29 is attached to the outer side of the joint portion 23 with the waveguide 13 at the upper end of the waterproof cover 21, and a self-fusing tape 30 and a vinyl tape 31 are sequentially wound thereon for waterproofing.

In this way, in the above waterproofing device, the waterproofing section 20 of the conventional inlet 13 is further covered with a waterproofing cover 21, and the space between this waterproofing cover 21 and the waveguide 13 is also waterproofed. It has been subjected.
Therefore, the waterproofing section 20 of the inlet 12 is not exposed to the outside air, thereby improving waterproofness.

[Effects of the invention] As described above, according to the invention, the waterproofed part of the waveguide inlet is not directly exposed to the outside air, so it is possible to prevent deterioration over time due to rain, snow, etc. can improve sex.

Furthermore, since a part of the side wall of the waterproof cover is vertically divided, it is easy to attach or remove the cover.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of a waterproof device for a waveguide inlet according to an embodiment of the present invention, and FIG. 2 is a side view of the same device as viewed from the joint side of a waterproof cover. 12...Inlet, 13...Waveguide, 15...Flanged packing, 17...Rubber packing,
20...Waterproofing section, 21...Waterproof cover, 23
...joint part, 25a, 25b...joint piece, 29...
... Compound, 30 ... Self-adhesive tape, 31
……Vinyl tape.

Claims (1)

[Scope of utility model registration request] The flange of the flanged pipe protruding from the end face of the waveguide inlet is bolted to a packing having an inner diameter that matches the outer shape of the waveguide inserted into the inlet, and the waveguide is inserted into the inlet. a first waterproofing section which is fixed to the base and subjected to waterproofing treatment; and has a joint portion that tightly covers the waveguide, a lower end surface is in contact with the inlet mounting surface, a vertically divided portion is formed in the side wall, and a joint piece is provided on the opposite surface of the vertically divided portion, and these A waterproof cover whose joint pieces are connected by a plurality of bolts and nuts, and a second waterproofing section formed by waterproofing the outside of the joint between the upper end of the waterproof cover and the waveguide. A waterproofing device for a waveguide inlet, which is characterized by: