JPH0733450Y2 - Outdoor enclosure waterproof structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a waterproof structure of an abutting portion between a plurality of divided covers in an outdoor housing.

[Conventional technology]

Conventionally, as a technique of this type of field, for example, it has been used for a slot array antenna of a radar antenna apparatus as shown in FIG. FIG. 3 is a cross-sectional view showing this slot array antenna (hereinafter referred to as an antenna). As described above, the antenna A includes the slot waveguide 1 that radiates an electromagnetic wave, the horn 2 that maintains the linearity of the slot waveguide 1 and at the same time secures the directivity of the electromagnetic wave, and the inside of the horn 2. The main part is composed of a resin cover 3 or the like as a strength member capable of preventing water from invading and transmitting electromagnetic waves. However, even if it is possible to satisfy the electrical function as an antenna with only such a main component, when it is installed outdoors, it cannot be used because it lacks waterproof performance.

Therefore, in order to secure the waterproof performance, it is necessary to cover the upper and lower parts of the horn 2 with a thin metal plate, and it is ideal for waterproofing if the thin metal plate is integrally manufactured and the horn 2 is covered. Since it is difficult to manufacture, as shown in FIG. 3, the cover 4 made of a thin metal plate is the upper cover 4a.
And the lower cover 4b, which are separately manufactured, and are fixed to the outer periphery of the horn 2, respectively. in this case,
It is necessary to apply some waterproofing to the abutting portion B between the upper cover 4a and the lower cover 4b. Therefore, conventionally
It was waterproofed as shown in Figs.

In the waterproof structure shown in FIG. 4, the end faces of the abutting portions B of both covers 4a and 4b are chamfered respectively, and a sealing agent 5 is applied to the gaps of V-shaped cross section formed by these chamfers. This is an example in which the waterproof performance is ensured.

Further, FIG. 5 is an example in which the waterproof performance is strengthened as compared with the example shown in FIG. 4, and the abutting portion B is the same as in the case of FIG. An aluminum foil tape 6 is adhered to prevent the agent 5 from peeling off and from being deteriorated.

[Problems to be solved by the device]

However, in the waterproof structure of the outdoor housing having the above configuration,
In either case of FIGS. 4 and 5, the strength of the abutting portion B is weak, and in particular, in the example of FIG. 4, the strength of the abutting portion B of the covers 4a and 4b depends only on the sealing agent 5, so that both covers are covered. If any one of them is pressed, the sealing agent 5 is cracked and the waterproof performance is deteriorated. Further, when the abutting portion B is covered with the aluminum foil tape 6 as shown in the example of FIG. 5, the strength of the abutting portion B is increased as compared with the example of FIG. For example, a thickness of 0.05 mm or less is not sufficient in terms of strength. However, if the aluminum foil tape 6 is made thicker than that, there is no risk of tearing even if one cover is pressed,
Bonding becomes difficult. Furthermore, since the aluminum foil tape is rolled when it is purchased, even if it is stretched, the state of rewinding remains, and the thicker the aluminum foil is, the more it peels off even if it is bonded. However, there is a problem that the bonding work is difficult and the bonding work is difficult.

The present invention has been made in view of the problems that the conventional technology has, and eliminates the problems of insufficient strength of the abutting portions of the upper and lower covers and the difficulty of bonding work, and improves the waterproof performance. An object of the present invention is to provide a further improved waterproof structure for an outdoor housing.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, the present invention covers the main body of equipment with a plurality of divided metal thin plates, and seals the abutting parts of each other with a sealing agent to waterproof the outdoor enclosure. In the structure, a chamfered portion is formed at the abutting portion between the plurality of metal thin plates, and the abutting portion is coated and filled with the sealing agent in a mountain shape, and the sealing agent upper portion has a V-shaped cross section. It is covered and fixed with a thin metal plate.

[Action]

According to the present invention, since the waterproof structure of the outdoor casing is configured as described above, even if a metal thin plate wound in a roll shape is used, the metal thin plate is preliminarily formed to have a V-shaped cross section. Therefore, even if the plate thickness is thick, the property of rewinding is removed,
It works so that fixing work to the cover with rivets etc. can be done easily and surely.

In addition, the V-shaped metal thin plate having a cross section has an increased second moment of area and is mechanically strong against a bending external force.

Further, since a large space can be formed between the abutted covers and the thin metal plate having the V-shaped cross section, a larger amount of the sealing agent can be filled in the space than in the conventional case, and the waterproof performance is improved. Therefore, it becomes possible to eliminate the above problems.

〔Example〕

 Hereinafter, embodiments will be described with reference to the drawings.

FIG. 1 is a side sectional view showing an essential part of an embodiment of the present invention, in which an upper cover 11a of a cover 11 and a lower cover 1 are shown.
Chamfered portions 111a and 111b are provided on both end surfaces of 1b in order to increase the adhesion area of the sealing agent 12. The method of applying the sealing agent 12 to the abutting portions C of the chamfered portions 111a and 111b does not necessarily have to be flush with the upper surfaces of the both covers 11a and 11b, but rather is applied in a heap shape. Then, a metal thin plate having a V-shaped cross section, for example, an aluminum thin plate 13
Is fixed to the upper cover 11a and the lower cover 11b with rivets 14 having a waterproof property. Here, aluminum thin plate 13
Is formed in a V-shaped cross section for the following two reasons. First, the first reason is that the aluminum thin plate 13 must be thickened in order to be securely fixed to the cover 11 with rivets or the like (according to the test results, 0.1 mm or more is desirable). However, when a sheet having such a plate thickness is used, it is in a roll shape at the time of purchase, and when it is stretched and fixed with a rivet or the like, it tends to be unwound, so that the fixing work is difficult. Therefore, in order to eliminate this tendency of rewinding, the cross-section is formed in advance.

The second reason is that the gap formed by the upper cover 11a, the lower cover 11b and the aluminum thin plate 13 is made large by forming the aluminum thin plate 13 in a V-shaped cross section, and a sealing for waterproofing is provided in the gap. This is to fill the agent 12.

[Effect of device]

Since the present invention is configured as described in detail above, it has the following effects.

The metal thin plate with a V-shaped cross section that covers and fixes the upper part of the sealing agent applied to the abutting part of both covers was made thicker than the conventional technology, so it was not possible to press the covers until the conventional As described above, a crack is not easily generated, and a strong waterproof structure can be obtained.

Further, by making the metal thin plate into a V shape, it is possible to eliminate the rewinding property generated in the flat plate state, the second moment of area increases, and it becomes strong against mechanical bending force. Fixing work to the cover with rivets etc. becomes easy and reliable.

In addition, since the space surrounded by the thin metal plate having a V-shaped cross section and both covers is widened, the amount of the sealing agent applied and filled can be increased, and the waterproof performance of the abutting portion can be improved.

The most preferable waterproof structure can be obtained by setting the thickness of the thin metal plate having a V-shaped cross section to 0.1 mm or more.

Further, it is also applicable to a waterproof structure of other housings installed outdoors such as a slot array antenna of a radar antenna device.

[Brief description of drawings]

FIG. 1 is a side view of an essential part showing an embodiment of the present invention, FIG. 2 is an external perspective view showing a radar antenna, and FIG. 3 is a cross-sectional view of a slot array antenna. It is a side view which shows the waterproof structure of the conventional cover abutting part, respectively. 11 …… Cover, 11a …… Upper cover, 11b …… Lower cover, 12 …… Sealant, 13 …… Aluminum thin plate, 14…
…rivet.

Claims (1)

[Scope of utility model registration request] 1. A waterproof structure for an outdoor housing, in which a device body is covered with a plurality of divided metal thin plates, and a sealing agent is applied and filled in an abutting portion between the metal thin plates, A chamfered part is formed at the abutting part between the thin plates, the abutting part is coated and filled with the sealing agent in a mountain shape, and the upper part of the sealing agent is covered and fixed with a thin metal plate having a V-shaped cross section. A waterproof structure for outdoor enclosures.