JPH0215338Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a hole closing device for an electrical equipment storage box, which is used for closing preliminary holes for installing electrical equipment in a waterproof and dustproof electrical equipment storage box. It is something.

(Prior art) Preparatory holes for installing electrical equipment, which are transparent in the top plate of electrical equipment storage boxes with waterproof and dust-proof construction, were conventionally sealed by press-fitting plastic lids; Because the effectiveness is insufficient, there is a risk that rainwater, dust, etc. may enter the interior.Also, some products seal the preliminary hole with a bolt nut with a seal that penetrates the preliminary hole to improve sealing performance. Although it has been used, it has the drawback that it requires a large number of components and requires a lot of effort to install.

(Purpose of the invention) The present invention solves the above-mentioned conventional drawbacks,
It was completed for the purpose of being a hole closing device for electrical equipment storage boxes that has a small number of components, is easy to install and remove, and can completely seal holes such as spare holes in electrical equipment storage boxes. .

(Structure of the device) The present device has a main body made of an elastic material, which includes a seat portion having a diameter larger than the hole to be sealed, and a plug portion provided on one side of the seat portion and capable of fitting into the hole. and a male threaded member which is screwed onto the insert nut and whose tightening force presses the end face of the plug to expand the diameter of the plug. This will be explained in detail below with reference to the illustrated embodiments.

In the figure, reference numeral 1 denotes a main body made of an elastic material such as synthetic rubber. 20, a short plug part 3 in the shape of an inverted truncated cone is integrally provided. Reference numeral 5 denotes an insert nut embedded inside the seat 2 of the main body 1, and the insert nut 5 is inserted into a tapered hole 4 provided from the center of the end surface of the plug 3 to the seat 2. The tips of a male threaded member such as a butterfly bolt 6 that is inserted are screwed together, and the insert nut 5 and the butterfly bolt 6, together with a washer 7 attached to the end face of the plug part 3, tighten the end face of the plug part 3 by their tightening force. It constitutes a fastener 8 that expands the diameter of the plug portion 3 by pressing. Although it is preferable to provide the washer 7 on the head of the male threaded member as in the embodiment, it is also possible to press the end face of the plug portion 3 directly with the head of the male threaded member.

As shown in FIG. 2, the device constructed in this way is installed in the main body 1 by fitting the plug 3 into a hole 20, which is like a preliminary hole for installing an electrical appliance, in an electrical equipment storage box 21. When the butterfly bolt 6 of the fastener 8 is rotated, the fastener 8 acts on the main body 1 because its tip is screwed into the insert nut 5, and the seat part with a larger diameter than the hole 20 is rotated. The end face of the plug part 3 made of an elastic material provided on one side of the hole 20 is pressed by the fastening force of the fastener 8, deforms outward, and expands in diameter. Since it firmly adheres to the inner circumferential surface and the seat 2 is also strongly drawn toward the washer 7 by the fastener 8 and tightly adheres to the circumferential surface of the hole 20, it is extremely simple to tighten using the fastener 8. Through this operation, the hole 20 will be completely sealed.

The fastener 8 is made up of an insert nut 5 buried inside the seat 2 and a male threaded member such as a butterfly bolt 6 whose tip is screwed into the insert nut 5. There is no need to penetrate the back side of the part 2, there is no risk of forming a gap where rainwater etc. can enter, and if the butterfly bolt 6 is used as in this embodiment, the number of component parts can be kept to a minimum. Moreover, since the whole can be set in one piece, it is easy to store and handle it. In addition, in the above embodiment, the seat portion 2 and the plug portion 3
Although the body 1 is integrally formed with the body 1, it is also possible to use a body in which the plug part 3 is attached to one side of the seat part 2. Therefore, when the seal is to be broken, if the tightening by the fastener 8 is released, the plug part 3 returns to its old state due to its own elasticity, so that it can be easily pulled out from the hole 20.

(Effects of the invention) As is clear from the above explanation, this invention has a small number of components and can completely seal the hole with an extremely simple operation. This device is suitable for sealing the preliminary hole of a device, and is of great practical value as it solves the drawbacks of conventional hole closing devices for electrical equipment storage boxes.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view showing an embodiment of the present invention, and FIG. 2 is a partially cutaway side view showing the same in a state of use. 1: Main body, 2: Seat, 3: Plug, 5: Insert nut, 8: Fastener.

Claims (1)

[Scope of utility model registration request] An insert nut embedded in the seat part 2 is provided in a main body 1 made of an elastic material, which includes a seat part 2 having a diameter larger than the hole to be sealed, and a plug part 3 provided on one side of the seat part 2 and capable of being fitted into the hole. 5, and a male screw member 8 which is screwed onto the male screw member and whose tightening force presses the end face of the plug portion 3 to expand the diameter of the plug portion 3. Storage box hole closing device.