JPS61164568A - Slow falling machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a slow descent machine used for descending evacuation from high-rise buildings in the event of a fire, etc. [Prior Art] A slow-drop aircraft is known that has a rope that suspends a person and moves the person in a spiral manner, and a rotary blade that rotates at high speed in a sealed case with fixed wings and generates braking force by the movement of the rope (for example, Japanese Patent Publication No. 59-1
01163).

[Problem that the invention seeks to solve]

Conventional slow-drop aircraft use rotary blades to accelerate air, apply it to fixed blades to decelerate the air, and then accelerate this air again using rotary blades to circulate the air inside the sealed case and obtain braking force. Because of this, the temperature of the case will rise as the button is used. This temperature increase is slight and poses no practical problem under normal usage conditions, that is, when the descending height is 15 m or less and the load is 100 Kp or less.

However, this temperature rise must be prevented when used for evacuation from a higher position or when a heavy load is lowered at 2 Å or more.

As a means of achieving this, a small hole is formed in the sealed case while ensuring that the original purpose of the sealed case, which is to prevent water and glass fragments from entering the inside, is maintained. A possible solution is to exchange the air from outside with outside air. However, although we repeated experiments while changing the position, size, and shape of the holes, we were unable to prevent the braking force from decreasing and the temperature from rising. I found out that I can't appear.

[Means for solving problems]

Therefore, the present invention was devised for the purpose of obtaining a configuration that can prevent temperature rise without reducing the braking force. , a rotating flow path is provided that allows air to flow along the rotation of the rotor blades, a discharge port is opened in this rotating flow path to release air to the outside, and air is taken out from the outside through the inner circumference of this rotating flow path. This is a slow descent machine that is characterized by having an inlet for entering the air.

[Function] The function of this slow descent machine is not necessarily clear, but it can be thought of as follows. In this slow descent machine, most of the outside air enters the case through the suction port, immediately flows through the rotating flow path, and is then exhausted from the discharge port. Therefore, there is no reduction in the flow rate of the circulating air that flows from the rotor to the fixture and returns to the rotor. Therefore, it is possible to prevent the reduction in braking force that would occur in the conventional case where a hole was simply provided in the case and the recirculated air was taken out directly to the outside air. Furthermore, since the exhaust gas naturally comes into contact with the air inside the case and partially replaces it, a cooling effect can also be obtained.

〔Example〕

There are cup-shaped cases 1416 on both sides of the central member 120.
It consists of a. A pulley 18 is supported between the central member 12 and the case 14, and a rope 20 is wound around the outer periphery of the pulley in a spiral manner.On the outer periphery of the goo IJ 18 are four pressing rollers 22. ...is established.
These are supported at their lower ends by the central member 12 and the case 14,
It is attached to a ring-shaped row of plate pieces 24, and when the hanging metal fitting 26 attached to the upper end of this plate piece row 24 is pulled, the pressing roller 22. . . . presses the rope 20 against the pulley 18 C. Therefore, when a person hangs from one of the hanging tools (not shown) provided at both ends of the rope 20, the rope 20 moves and the pulley 18 rotates accordingly.

Note 28. . . . are guide rollers that guide the rope 20.

A gear 30 rotates together with the pulley 18, and this rotation is transmitted at increased speed via gears 32, 34, and 36. Reference numeral 38 denotes a rotary blade which, together with the gear 36, rotates the central portion between the central member 12 and the case 16 at high speed.

40 is a fixed wing, the outer periphery of rotation 1IL38, case 1
6 is installed on the inner surface of the rotary blade 38, and the air emitted by the rotary blade 38 at a speed in the rotational direction collides with the air. A ventilation space 42 is formed between the rotary blade 38 and the flat plate portion of the case 16, and allows air that has collided with the fixed blade 40 to flow back to the center of the rotary blade 38. In this ventilation space 42, there is a case 16.
A lip 44 protrudes from the flat plate portion of the air holder and arranges the air flow in a radial direction.

Reference numeral 46 denotes a rotary flow path, which is provided at the end of the fixture 40 of the outer part of the rotor blade 38 in the case 16, at a position along the central member 12, and allows air to flow along the rotation of the rotor blade 380. It is an outlet and consists of a gap formed between the central member 12 and the case 16, and communicates the rotating flow path 46 with the outside. 50. . . . is an inlet, which is formed in the central member 12 and is inserted into the rope 20 insertion hole 52 of the case 14,
The outside air that has passed through the case 14 is taken into the case 16.

Since this slow descent machine has the above configuration, it operates as follows. When the rope 20 moves and the rotor blade 38 rotates at high speed, the air inside the case 16 is accelerated from the center of the rotor blade 38 at high speed, hits the fixture 40, and is circulated back toward the rotor blade 38 via the ventilation space 42. Then, a braking force is applied to rotation X38. Further, air entering the case 16 from the outside through the inlet 50 is turned into a rotating flow by the rotary blades 38, flows through the rotary flow path 46, and is discharged from the outlet 48. Therefore, the flow rate of the recirculated air is not reduced by the intake and exhaust air, and no reduction in braking force occurs. According to experiments, the outlet 48 was closed with adhesive tape, and 2 weights were added to 100 to 15.
rn It took about 18 seconds to lower the vehicle, but when the exhaust port was opened and the same lowering was performed, it took about 22 seconds, and the braking force actually increased.

It is presumed that this is because the rotary flow path 46 equalizes the pressure difference before and after the fixed blades 40, and has the same effect as when the number of fixed blades is increased. Furthermore, since the exhausted air comes into contact with and partially replaces the recirculated air, the entire gradual descent machine is naturally cooled.

When an experiment was repeated in which a 1.00 Kp weight was lowered by 15 m, no temperature rise was observed.

When a similar experiment was conducted using 5oKp steel, the temperature of the aircraft body was 3 to 5 degrees Celsius lower than the air temperature. This indicates that the exhausted air mainly cools the high-pressure, high-temperature circulating air near the fixed blade 40 to perform a circulating air pressure cooling cycle, and this cooling of the slow descent aircraft It turns out to be extremely effective.

〔Effect of the invention〕

As is clear from the above, in the present invention, a rotary flow path is provided in the case, and this rotary flow path is provided with an exhaust port and an inlet port, so that it is possible to prevent the airframe from rising without reducing the braking force. Can be done.

Therefore, according to the present invention, it is possible to realize a slow descent aircraft that can be used for descents with larger loads and longer distances.

[Brief explanation of drawings]

An embodiment of the present invention is shown in the drawings, in which Fig. 1 is a front sectional view, Fig. 2 is a sectional view taken along the previous line ■-■, and Fig. 3 is a cross-sectional view taken along the line ■-■ of Fig. 1.
FIG. 16-...Case, 20-...Rope,
38...Rotary wing, 40...Fixed wing,
46... Rotating flow path, 48...
・Exhaust port, 50... Intake port.

Claims (1)

[Claims] 1. In a slow descent aircraft that has a rope that hangs people alternately at both ends and moves in a spiral manner, and a rotary blade that rotates at high speed in a sealed case with fixed wings by the movement of this rope and generates a braking force, A rotary flow path is provided at the fixed blade end on the outer periphery of the rotor blade in the case to allow air to flow along the rotation of the rotor blade.
A discharge port for discharging air to the outside is opened in this rotating flow path, and an intake port is provided on the inner circumference of this rotating flow path to take in air from the outside. A slow descent machine characterized by exchanging air with outside air to prevent temperature rise.