JPS6243069Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a connection structure between a bend cap and a connecting pipe.

Conventionally, as this type of connection structure, for example, the fifth
As shown in the figure, a hook 13 attached to the inner surface of the bend cap 12 is hooked to the upper opening edge of the ventilation pipe 11 rising above the rooftop slab S, and the bend cap and the ventilation pipe 11 are connected at multiple locations. The upper end of the asphalt waterproof layer 15 connected with bolts 14 and provided on the outer circumferential surface of the ventilation pipe is attached to a presser band 1.
6, and this band is fixed with screw 17 (Utility Model Application No. 139533/1983). However, with this connection structure, it takes time to attach the bend caps 12 because they are fixed at multiple locations with bolts 14, and the asphalt waterproof layer is held in two steps: holding the asphalt waterproof layer using the holding bands 16 and fixing the bands using the screws 17. improvement is desired.

An object of the present invention is to provide a connecting structure for connecting a bend cap and a ventilation pipe, which allows the bend cap to be easily installed and also allows the asphalt waterproof layer to be maintained at the same time as the bend cap is installed. The features of this invention include a ventilation pipe with a waterproof layer provided on the outer circumferential surface of the upper part that projects upward from the slab, and a hole that is attached to the upper end of the ventilation pipe and has the same diameter as the ventilation pipe in the upper surface. A holding cap having a holding part that can be elastically deformed in the radial direction on the lower circumferential surface, a cylindrical part inserted into the upper end of the ventilation pipe by a connecting means such as a screw, and the holding part being attached to the waterproof cap. and a bend cap having an annular portion that presses against the outer periphery of the upper end of the layer.

An embodiment of the present invention will be described below based on the drawings. In Figures 1 and 2, a female thread 1a is provided on the inner surface of the upper end opening of the ventilation pipe 1, and an asphalt waterproof layer 2 is provided as a waterproof layer on the upper outer peripheral surface of the ventilation pipe.
is provided. A holding cap 3 made of, for example, synthetic resin is attached to the outer periphery of the upper end of the ventilation pipe 1.

As shown in Figs. 1 to 3, this holding cap has a hole 4 with the same diameter as the ventilation pipe 1 through its upper surface, and the outer periphery of this hole is located at the upper end of the ventilation pipe 1, and is held in this state. Cap is supported. Further, the holding cap 3 is cut radially upward from its lower part, and this cut 5 allows a plurality of holding pieces 6 to be formed.
...is formed. The outside of each holding piece is an inclined portion 6a, the inside is an uneven surface 6b, and each holding piece can be elastically deformed in the radial direction.

A bend cap 7 is screwed to the upper end of the ventilation pipe 1. That is, the bend cap is provided with a short tube-shaped cylindrical portion 9 with a male thread on the outer periphery at the center of the interior through the reinforcing rib 8. It is matched. Further, an annular portion 10 supported by reinforcing ribs 8 is provided inside the bend cap and on the outer peripheral side of the lower part of the holding cap 3. This annular portion presses the holding piece 6 of the holding cap 3 from the outside and presses the upper end of the asphalt waterproof layer 2 against the outer peripheral surface of the ventilation pipe 1, thereby holding the waterproof layer on the ventilation pipe.

Next, the attachment of the bend cap 7 to the ventilation pipe 1 will be explained. First, the holding cap 3 is supported on the upper end of the ventilation pipe 1 by the outer periphery of the mounting hole 4, and then the cylindrical body part 9 of the bend cap 7 is screwed into the upper end opening of the ventilation pipe 1 as shown in FIG. As the annular part 10 goes down, it eventually comes into contact with the inclined part 6a, and as the bend cap is further screwed in, this annular part presses the holding piece 3 toward the ventilation pipe. The holding piece 6 is elastically deformed to the side and comes into pressure contact with the asphalt waterproof layer 2, so that the asphalt waterproof layer is held and fixed to the ventilation pipe 1 (FIG. 1).

In the above embodiment, the vent pipe 1 and the bend cap 7 are connected by screws, but other connecting means may be used such as press-fitting the tubular portion 9 of the bend cap 7 into the vent pipe 1. Also, in the above embodiment, the retaining portion of the asphalt waterproof layer 2 is constituted by the retaining piece 6 formed by the cut 5, but it does not necessarily have to be a retaining piece, and the retaining cap 3 may be used.
The support may be provided around its entire periphery without cutting into the lower portion.

As explained above, according to the present invention, the bend cap can be easily attached to the vent pipe, and the waterproof layer provided on the outer circumferential surface of the vent pipe can be held and fixed at the same time as the bend cap is attached. Can be done. Moreover, the number of parts is small, and installation workability is improved.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of a connecting structure showing an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along the line shown in Fig. 1, Fig. 3 is a perspective view of the holding cap, and Fig. 4 is a view of how the bend cap is attached. A partial cross-sectional view for explaining the process, and FIG. 5 is a cross-sectional view of a conventional connection structure. 1... Ventilation pipe, 1a... Female thread, 2... Asphalt waterproof layer, 3... Holding cap, 4... Hole,
6... Holding piece, 6a... Inclined part, 7... Bend cap, 9... Cylindrical body part, 9a... Male thread, 10
...annulus.

Claims (1)

[Claim for Utility Model Registration] A ventilation pipe with a waterproof layer provided on the outer circumferential surface of the upper part of the pipe that protrudes above the slab; a holding cap having a radially elastically deformable holding part around its lower part; a cylindrical part inserted into the upper end of the ventilation pipe by a coupling means such as a screw; and a holding part including the holding part. a bend cap having an annular portion that presses against the outer periphery of the upper end of the waterproof layer; and a connecting structure of a bend cap and a ventilation pipe.