JPH0356833Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a connection structure that firmly connects irregularly shaped flanges provided on damper cases and ducts with one touch.

(Prior Art) When a damper case or a duct is joined by a flange, a large number of bolt holes are drilled in the flange surface regardless of the shape of the flange, and bolts are tightened over the entire length of the flange surface.

(Problem that the invention aims to solve) However, when connecting with this conventional bent flange and reducing the number of tightening bolts, the flange does not have enough rigidity, causing the duct to bend or bend. It is not possible to reduce the number of tightening bolts around the entire circumference of the flange due to deformation.
The problem was that it took a lot of time and effort to drill bolt holes, manage bolts, and tighten them on-site, resulting in high costs.

(Means for Solving the Problems) The present invention was made to solve the problems of the conventional art, and its purpose is to drastically reduce the number of tightening bolts by connecting bent flanges.
Also, different flanges can be connected with one touch.
Furthermore, it is an object of the present invention to provide a connection structure between a damper case flange and a duct flange that can reduce deflection and bending of the duct and deformation of the flange. To prevent warping, widened parts are formed on the outer peripheral edge of the bent flange formed by bending the end of the duct at right angles so as to protrude in the opposite direction to the flange surface, and both sides of the flat steel plate are bent inward. Provide a crowning part with a width that is approximately the same as the combined width of the warp and widened part when the flanges are bent and face each other, and the tip of one of the bent parts is appropriately extended to serve as a flange introduction part. A clamp is provided, and the damper case and the duct are connected by firmly fixing the widened portions of the L-shaped flange and the bent flange warp to each other with the crowning portion of the clamp.

(Function) Therefore, in the present invention, the outer circumferential edge of the L-shaped flange is warped, and the outer circumferential edge of the bent flange formed by bending the end of the duct at a right angle has a widened portion protruding in the opposite direction to the flange surface. In addition, both sides of the flat steel plate are bent inward and a crowning part is provided with a width that is approximately the same as the width of the warp and widened part when the flanges meet each other. Even if the damper case and the duct are connected to each other, the damper case and the duct can be connected by fixing the warp and the widening part at the crown attachment part.

In addition, this clamp has one bent part extended as appropriate to serve as the flange introduction part, so the other bent part is locked to the widened part of the duct flange, and the flange introduction part is attached to the warped upper surface of the damper case flange. When the flange introduction part is pushed in after making contact, the warped damper case flange is also fitted into the crown fitting part of the clamp at once due to the spring action of the flat steel plate.

In this way, one flange joint is fixed with about 8 clamps, and only the four sections need to be removed with bolts.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

In this embodiment, two warps 3 are formed on the outer periphery of one side of the L-shaped flange 2 attached to the damper case 1. This warp 3 is gradually stamped out from the middle of the flange surface in a direction opposite to the flange surface, and is made to protrude maximum at the outer peripheral edge of the flange.

Further, the outer circumferential edge of a bent flange 5 formed by bending the end of the duct 4 at a right angle is slightly rolled inside in the direction opposite to the flange surface to reinforce the outer circumferential edge.

This outer peripheral edge is aligned with the position of the warp 3 of the L-shaped flange 2 and protrudes in a direction opposite to the flange surface to form a widened portion 6.

In addition, the clamp 7 bends both sides of the flat steel plate 8 with curved surfaces, and the distance between the bent portions 9 is adjusted to the warp 3 and widening when the L-shaped flange 2 and the bent flange 5 are brought together. The bent portions 9 and 6 are formed to have substantially the same width as each other, and a crown fitting portion 10 is formed between the bent portions 9 and 9. Further, one of the bent portions 9 is extended as it is to the vicinity of a perpendicular line dividing the crown fitting portion 10 into two, thereby providing a flange introduction portion 11.

In order to connect the flanges 2 and 5 with each other with the clamp 7, the flanges 2 and 5 are brought into contact with each other, and the bent part 9 of the clamp 7 without the introduction part 11 is engaged with the widened part 6, and the flange introduction part When the curvature 11 is brought into contact with the curvature 3 and then pushed in, the curvature 3 is instantly fitted into the crown attachment part 10 of the clamp 7 by the spring action of the flat steel plate, and the flanges 2 and 5 are fixed with one touch.

In addition, 12 is a bolt provided at four intervals of the flange, and 13 is a seal.

Although the embodiment of the present invention has been described above with reference to the drawings, the specific configuration of the present invention is not limited to this embodiment, and the present invention may be modified without departing from the gist of the invention. within the technical range of

For example, as shown in FIG. 4, the curvature 3 may be formed over most of the L-shaped flange 2.

Alternatively, as shown in FIG. 5, cuts 3a may be made at both ends of the warp 3, and the warp 3 may be bent.

Furthermore, in this case, as shown in FIG.
may be formed over most of the L-shaped flange 2, as in the case of FIG. 4 above.

(Effects of the Invention) As described above, according to the present invention, by having the configuration having the above characteristics, flanges of different shapes can be easily and quickly fixed to each other to connect the damper case and the duct.

Furthermore, the number of bolts to be tightened can be greatly reduced, and costs can be reduced. Furthermore, by providing a highly rigid L-shaped flange on the damper case and connecting this to the bending flange of the duct, the entire duct is prevented from bending and bending, and the flange is prevented from deforming, thereby creating a duct with less bending and bending. I can do it.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the connection state of the damper case and duct according to the embodiment of the present invention, Fig. 2 is a perspective view of the clamp, Fig. 3 is an explanatory diagram showing the installation order of the clamp, Figs. 5 and 6 are perspective views showing the shape of warpage in other embodiments. 1... Damper case, 2... L-shaped flange,
3... Warp, 4... Duct, 5... Bent flange, 6... Widening part, 7... Clamp, 8... Flat steel plate, 9... Bent part, 10... Crown attachment part, 11 ...Flange introduction part.

Claims (1)

[Scope of utility model registration request] A warp is formed on the outer periphery of the L-shaped flange attached to the damper case, and a widened portion is formed on the outer periphery of the bent flange formed by bending the end of the duct at right angles so as to protrude in the direction opposite to the flange surface. Further, both sides of the flat steel plate are bent inward, and a crowning part is provided with a width that is approximately the same as the combined width of the warp and widened part when the flanges meet each other, and the tip of one of the bent parts is provided. The damper case and the duct are connected by firmly fixing the widened portions of the L-shaped flange and the bent flange warp to each other with the crowning portion of the clamp. The damper case and duct connection structure is characterized by: