JPS62117449U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the ventilation state in an embodiment of this invention, Fig. 2 is a longitudinal sectional view thereof, Fig. 3 is a longitudinal sectional view in the ventilation blocked state, and Fig. 4 is a part of another ventilation pipe. 5 is a perspective view of another embodiment of this invention in a ventilation state; FIG. 6 is a longitudinal sectional view thereof; FIG. 7 is a longitudinal sectional view showing a ventilation blocked state;
The figure is a longitudinal cross-sectional view of still another embodiment of this invention in a state where ventilation is blocked. 1... Roof, 2, 9, 14... Opening, 3, 13,
16...Top plate, 4,12,19...Vent hole, 5,7,
15...Ventilation tube, 6,10,18...Operation member.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) It has an opening in the roof and a top plate on the top that closes the opening, allowing it to expand and contract from the opening to the outdoors, and has ventilation holes on the periphery. 1. A ventilation system comprising: a ventilation tube; and an operating member that operates expansion and contraction of the ventilation tube from the opening. (2) The ventilation device according to claim (1), wherein the ventilation tube is a bellows-shaped ventilation tube whose lower end is attached to the opening. (3) The ventilation tube is a male-threaded ventilation tube with a thread groove formed on its circumferential surface, and the opening portion is configured to have a female screw shape that screws into the ventilation tube. Ventilation equipment as described in paragraph (1).