JPH0127365Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] This invention is applicable to the walls of boxes such as electrical equipment switchboards and control panels, which have internal temperature rise factors due to heat generation, especially the walls of steel boxes such as doors. This relates to a ventilation section consisting of a louver, louver, etc.

[Conventional technology]

As shown in Figure 4, Figure 5, and Figure 6, the ventilation section (ventilation window) A of the steel wall consists of a rectangular frame section B and a parallel frame section C arranged at intervals. There is a structure in which the space between the pieces of the armor plates is used as an air passage. (Utility Model No. 51-3029). D is the net.

On the back side of the frame piece A, a protruding strip is integrally provided around the entire circumference to engage with the hole edge of the window hole formed in the steel wall E, and the hole edge of the steel wall E is provided with There is a hole through which a screw for attaching the frame piece is provided, and a female screw hole for screwing the screw into the frame piece is provided in the frame piece.

[Problem that the invention attempts to solve]

Providing a hole for passing a screw for attaching a frame piece to the edge of a window hole formed in a steel wall, or creating a female screw hole in a frame piece to match this screw hole, requires special tools for on-site construction. Not only is this complicated, but it is also extremely complicated.

The purpose of this invention is to create a ventilation section structure in which screws for attaching to the edge of the window hole are pre-attached to the ventilation panel frame, without requiring screw holes on the edge of the window hole in the steel wall.

[Means for solving problems]

In order to solve the above problems, this idea is to attach screws to the upper and lower edges as well as to the left and right edges of the ventilation panel frame so that they protrude from the back side, and these screws are attached to the rectangular window formed in the steel wall. Set the mounting position so that each screw is inserted into the hole and contacts the edge of the window hole, and screw a nut into each screw through a washer with an area that sufficiently overlaps the edge of the window hole, and connect the washer and the panel frame. This is a structure of a ventilation part of a steel wall in a box, etc., in which the hole edge of a rectangular window frame is clamped and fastened to the peripheral edge.

[Effect]

The panel frame is brought into contact with the window hole from the outside, the screws protruding from the back of the panel frame are passed through the window hole, and the washer passed through the screw on the inside of the window hole is connected to the periphery of the panel frame to form the edge of the window hole. Finish installing the panel frame by sandwiching it and tightening the nuts screwed into the screws.

〔Example〕

In Fig. 1, A is a ventilation panel frame attached to a window hole 4 of a steel wall B, and this panel frame is shown as an example of a louver type, where 1 is a peripheral frame, 2 is a louver crosspiece, and 3 is a louver. This is a ventilation hole formed by pressing and raising the crosspiece.

The peripheral frame part 1 of the panel frame A has screws 5 attached to the upper and lower edges and the left and right side edges, and protrudes toward the back side.

The screws 5 are attached to the panel frame at positions such that each screw is inserted into the window hole 4 and comes into contact with the edge of the hole.

With the screw passed through the window hole, a washer 6 is passed through the screw 5 and a nut 7 is screwed in. The washer 6 has an area that sufficiently overlaps the edge of the window hole 4.

Among the washers shown, the one on the two longitudinal edges was a rectangular washer 6a having a length extending between the edges of the same two sides and having both ends sufficiently overlapped with the edges of the window hole 4.

Attaching the panel frame A (peripheral frame part 1) to the window hole 4 is as follows:
Pass the screw 5 attached to the panel frame through the window hole 4, pass the washers 6, 6a through the passed screw, and screw in the nut 7. With the edge of the window hole 4 sandwiched between the peripheral edge of the panel frame and the washer, tighten the nut 7. Tighten to complete the installation.

〔effect〕

The structure of this invention has the following effects.

(1) The screws attached to the panel frame and protruding from the back side can be inserted into the window holes, and the mounting position of each screw is set so that it contacts the edge of the window hole, so When the frame is in contact with the window hole and the screw is inserted into the window hole, the panel frame fits into the window hole without play.

(2) The nut is screwed into the screw passed through the window hole through a washer with an area that sufficiently overlaps the edge of the window hole.
By securely sandwiching the edge of the window hole between this washer and the peripheral edge of the panel frame and tightening the nut, the panel frame can be firmly attached to the edge of the window hole.

(3) Since the edge of the window hole does not have a screw hole, a screw hole is formed on the edge of the window hole to correspond to the screws on one side of the ventilation window frame that are found in conventional ventilation windows (ventilation parts). There is no complexity at all.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway exploded perspective view of the ventilation section according to the present invention taken from the back side of an example of a panel frame; Figure 3 is a cross-sectional plan view of the main parts of the above, Figure 4 is a perspective view of a conventional electrical equipment box equipped with a ventilation window, Figure 5 is a front view of the ventilation section, and Figure 6 is a vertical right side view of the same as above. It is a diagram. A...Panel frame, 1...Peripheral frame, 2...Gallery crosspiece, 3...Vent hole, B...Steel wall, 4...Window hole, 5...Screw, 6, 6a...Washer, 7 ...Natsuto.

Claims (1)

[Scope of utility model registration request] In the ventilation section, a rectangular window hole is made in a required part of the steel wall and the window hole is closed with a panel frame provided with the ventilation hole. These screws can be inserted into the rectangular window hole, and their mounting positions are set so that they come into contact with the edge of the window hole, and each screw has an area that sufficiently overlaps the edge of the window hole. A structure of a ventilation section of a steel wall in a box or the like, characterized in that a nut is screwed in through a washer, and the edge of a rectangular window hole is clamped and fastened between the washer and the peripheral edge of the panel frame.