JPH0242991Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a connecting device at the connecting end between two ducts.

[Prior Art] Conventionally, this type of duct connection device has integrally formed a plurality of common plate flanges 1 having a shape at the connecting edges of the duct toys, A', which have a rectangular cross section to be connected, and each duct toy, In order to connect the adjacent common plate flanges 1, 1 in A', an auxiliary piece 3 having a bolt insertion hole is fixed at the corner, and a common plate flange 1, 1 is provided on the contact surface of the opposing common plate flanges 1, 1. A concave groove 4 is formed in the longitudinal direction of the plate flanges 1, 1, and a string-shaped sealing material 5 is fitted into the concave grooves 4, 4, and then the opposing plate flanges 1, 1 are brought into contact with each other. The upper horizontal portions 6, 6 of the plate flanges 1, 1 are clamped with the attached member 7, which has a flat C-shaped cross section, and the opposing auxiliary pieces 3, 3 are fastened together with bolts 8. The ones shown in FIGS. 1 and 2, and the one disclosed in, for example, Japanese Utility Model Publication No. 1715/1983 are well known.

[Problem that the invention attempts to solve]

The conventional type described above has a lack of strength where the flange part is easily crushed by colliding with other objects, and when the thickness of the plate of the flange part is increased in order to solve the lack of strength, the flange part has a common plate structure. It is unreasonable to increase the thickness of the entire duct, which increases the weight of the duct.Furthermore, as a means to strengthen the flange part, it is necessary to make the flange part stronger. Although there is a method of attaching the member to the connecting end of the duct by a separate attachment means, this method has drawbacks such as the construction and construction work are complicated and not necessarily preferable.

[Means for solving problems]

The present invention forms a U-shaped groove 9 that opens toward the base end of the common plate flange 1 on the outside of the connecting end of the duct toy, A', and also forms a U-shaped groove 9 in the upper horizontal part 6 of the common plate flange 1.
A hooking edge 10 is provided on the outer edge of the flanges 1, 1, and a reinforcing plate 13 having a bent portion 11 on the upper edge and a bent portion 12 on the lower edge is brought into contact with the outer side of the flanges 1, 1. The above defects are solved by fitting the bent portion 11 into the U-shaped groove 9 and by locking the bent portion 12 to the hooking edge 10. .

〔Example〕

In the embodiment shown in the figure, a plurality of common plate flanges 1 having a shape are integrally formed at the connecting edges of the duct toys, A', each having a rectangular cross section.
In order to connect the adjacent common plate flanges 1, 1 in A', an auxiliary piece 3 having a bolt insertion hole at the corner is fixed by a spot weld, and the contact surface of the opposing common plate flanges 1, 1 is fixed by spot welding. A concave groove 4 is formed in the longitudinal direction of the common plate flanges 1, 1, and after a string-shaped sealing material 5 is fitted into the concave grooves 4, 4, the opposing common plate flanges 1, 1 are brought into contact with each other. Upper horizontal portions 6, 6 of both plate flanges 1, 1
The adherend member 7 has a flat C-shaped cross section.
The main part of the duct connecting device (same configuration as the conventional one shown in Figs. 1 and 2 above) Therefore, illustration is omitted.)
In this main part, a U-shaped groove 9 that opens toward the base end of the common plate flange 1 is formed on the outside of the connecting end of the duct toy, A', and the common plate flange 1
A hook edge 10 is provided on the outer edge of the upper horizontal portion 6, and a reinforcing plate 13 is provided on the outer side of the common plate flanges 1, 1 with a bent portion 11 on the upper edge and a bent portion 12 on the lower edge. The bent portions 11 are brought into contact with each other, and the bent portions 11 are fitted into the U-shaped grooves 9, and the bent portions 12 are engaged with the hook edges 10.

In addition, numeral 15 in the figure indicates a stopper for positioning.

[Effect]

As described above, the present invention forms a U-shaped groove 9 that opens toward the base end of the common plate flange 1 on the outside of the connecting end of the duct toy A', and also forms the upper horizontal part 6 of the common plate flange 1. A hook edge 10 is provided on the outer edge of the common plate flange 1, 1, and a reinforcing plate 13 having a shaped bent portion 11 on the upper edge and a shaped bent portion 12 on the lower edge is brought into contact with the outer side of the common plate flanges 1, 1. Since the bent portion 11 is attached to the U-shaped groove 9 and the bent portion 12 is locked to the hook edge 10, the presence of the reinforcing plate 13 helps to solve the above-mentioned lack of strength. It is.

[Effect of idea]

Since the present invention is as described above, it has excellent effects that can completely achieve the intended purpose.

[Brief explanation of the drawing]

Fig. 1 is a partial perspective view showing an embodiment of a conventional duct connection device, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 is an embodiment of the duct connection device of the present invention. 1, and is a sectional view of a portion corresponding to the line A-A in FIG. 1. A, I'...Duct, 1...Flange, 3...
Auxiliary piece, 4... Concave groove, 5... Sealing material, 6... Upper horizontal portion, 7... Adhered member, 8... Bolt, 9...
... U-shaped groove, 10 ... hook edge, 11, 12 ... bending part, 13 ... supplementary inspection plate, 15 ... stopper.

Claims (1)

[Scope of utility model registration request] A plurality of common plate flanges 1 having a shape are integrally formed at the connecting edges of the duct toys A' having quadrilateral cross sections to be connected, and the adjacent common plate flanges 1, 1 in each duct toy A' are continuous. In order to do this, an auxiliary piece 3 having a bolt insertion hole is fixed at the corner, and a groove 4 is formed in the longitudinal direction of the common plate flanges 1, 1 on the contact surfaces of the common plate flanges 1, 1 facing each other. After fitting the string-like sealing material 5 into the grooves 4, 4, the opposing plate flanges 1, 1 are brought into contact with each other, and the upper horizontal portions 6, 6 of the plate flanges 1, 1 are brought into contact with each other.
The adherend member 7 has a flat C-shaped cross section.
In a duct connecting device configured to clamp the opposing auxiliary pieces 3 and 3 together with bolts 8, the base of the common plate flange 1 is attached to the outside of the connecting end of the duct toy A'. U-shaped groove 9 that opens toward the end
In addition, a hook edge 10 is provided on the outer edge of the upper horizontal part 6 of the common plate flange 1, and a bent part 11 is provided on the upper edge of the common plate flange 1, 1, and a bent part 11 is provided on the lower edge of the common plate flange 1. 12 are brought into contact with each other, the bent portions 11 are fitted into the U-shaped grooves 9, and the bent portions 12 are engaged with the hook edges 10. duct connection device.