JPS6317954Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a curtain-like airflow generation device, and more particularly to a curtain-like airflow generation device that blows out compressed air taken in from an air hose.

Conventionally, as a curtain-like airflow generation device, a large number of small holes are provided at appropriate intervals along the long axis of a cylindrical pipe with an opening connected to an air hose at one end and a closed end at the other end. A device was used that created a curtain-like airflow by merging the airflows blown out from the groups.

However, with such conventional means, (a) when air is blown out from a small hole in a cylindrical pipe, air around the outlet is mixed in, creating a state of air turbulence, which causes noise when generated; There were flaws.

(b) On the other hand, in order to increase the flow rate of air flow, it is necessary to provide a large number of small holes. This has resulted in the drawback that it requires a large number of man-hours to manufacture the device.

(c) Furthermore, the amount of air blown out increases in the structural part of the cylindrical pipe near the air hose or in the part where the airflow is obstructed by the closed part at the end of the cylindrical pipe. For this reason, there was a drawback that the amount of air blown out was small in other parts, resulting in non-uniformity in the amount of air blown out depending on the location.

An object of the present invention is to provide a curtain-like airflow generating device that eliminates the above-mentioned drawbacks of the conventional art.

That is, the curtain-like airflow generator of the present invention includes a pipe having a gas supply port at one end, an elongated through hole parallel to the long axis of the pipe, and two flat plate parts inserted parallel to the through hole. The present invention is characterized in that an elongated spacer is installed between the flat plate parts in a direction perpendicular to the long axis of the cylindrical pipe, and a folded wing part cut out to the outside of the flat plate is provided on the flat plate part inside the cylindrical pipe.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

As shown in FIG. 1, an opening 1a at one end of the cylindrical pipe 1 is provided with an opening through which compressed air flows from an air hose 2, and the other end on the opposite side is a closed part 1b. An elongated rectangular through hole 3 is provided in the cylindrical pipe 1 along the long axis of the cylindrical pipe 1, and two flat plates 4 and 5 which are parallel to and approximately perpendicular to the through hole 3 are inserted and fixed.

Flat plates 4 and 5 as shown in FIGS. 2 and 3
A notch 6 is made in advance in the portion that enters the cylindrical pipe 1, and a fin-like folded wing part 8 is provided along the fold line 7 and opened to the outside of both flat plates 4 and 5.

Between the flat plates 4 and 5, there is a spacer 9 having an end edge with a slope gently bent from the horizontal direction to the vertical direction so as to guide the air flow from a direction parallel to the axis of the cylindrical pipe 1 to a direction perpendicular to the axis of the cylindrical pipe 1. Insert.

Next, the operating state of the device of the present invention will be explained with a focus on air flow.

Compressed air supplied from the air hose 2 flows from the opening 1a throughout the cylindrical pipe 1 as shown by the arrow, is received by the folded wing part 8, is guided to the gap between the flat plates 4 and 5, and is then passed through the spacer 9 in the gap. The direction of the flow is changed from the direction parallel to the axis of the cylindrical pipe 1 to the direction perpendicular to the axis of the cylindrical pipe 1 guided by the edge of the flat plate 4.
and 5, a curtain-like air flow is released.

As described above, the present invention has the following advantages: (i) Since the airflow blown out from between the two flat plates is blown out as a curtain-like airflow from the beginning,
Since there is little chance of air turbulence being generated by entraining the air around the exit, the noise generated when it occurs is low.

(ii) Furthermore, since the air outlet is the same as the cross section of the curtain-like air flow, the resistance to the flow at the outlet is small, so a large amount of air can be easily blown out.

In addition, by adjusting the opening angle of each folded wing section 8, the flow rate of air received by the folded wing section can be controlled, and the amount of air blown out can be made the same at any position of the outlet between both flat plates. .

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the device of the present invention, FIG. 2 is a side view of a flat plate used in the present invention, and FIG. 3 is a sectional view of the cylindrical pipe of the present invention as viewed from the longitudinal direction. 1... Cylindrical pipe, 1a... Opening, 1b...
Closing part, 2...Air hose, 3...Through hole, 4,
5... Flat plate, 6... Notch, 7... Crease, 8
...Folded wing section, 9...Spacer.

Claims (1)

[Scope of utility model registration request] A pipe having a gas supply port at one end, an elongated through hole provided along the long axis of the pipe, a pair of flat plates inserted into the through hole, and a notch in the end of the flat plate inside the pipe. A fin-like folded wing section is provided by folding back along a diagonal crease from the end of the notch and opening toward the gas supply port, and between the pair of flat plates, the blade is folded gently from the horizontal direction to the vertical direction. A device for generating a curtain-like airflow, characterized in that a spacer having end sides having bent slopes is sandwiched between the spacers, and the gas is received by the folded wing portions and guided to the gap between the folds of the pair of flat plates.