JPH0544300B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a slow descent machine used for descending evacuation from high-rise buildings in the event of a fire or the like.

[Conventional technology]

Conventionally, a rope that moves in a vine-like manner hangs people alternately from both ends, and the movement of this rope rotates at high speed in a sealed case with fixed wings.
There are known slow-drop planes that have rotating blades that generate braking force by colliding the air in a sealed case with a fixed wing using centrifugal force, and then returning the air from the fixed wing to the center through a ventilation space (for example, Publication No. 59-101163).

[Problem that the invention seeks to solve]

Conventional slow-drop aircraft use rotating blades to accelerate the air, hit the fixed blades to decelerate the air, and then use the rotary blades to accelerate the air again to circulate the air inside the sealed case.
Since it is used to obtain braking force, the case temperature rises with use. This temperature rise occurs under normal usage conditions, that is, when the descending height is less than 15 m and the load is less than 100 kg.
The amount is small and poses no practical problem.

However, this temperature rise must be prevented when used for evacuation from a higher position or when two or more people are descending at the same time under a heavy load.

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 realized that it couldn't be done.

[Means for solving problems]

Therefore, the present invention was devised for the purpose of obtaining a structure that can prevent temperature rise without reducing braking force. A rope is lowered and moves in a spiral manner, and the movement of this rope causes it to rotate at high speed inside a sealed case with fixed wings.
In a slow descent aircraft having a rotor blade that causes the air in the case to collide with a fixed blade using centrifugal force and then returns from the fixed blade to the center through a ventilation space to generate a braking force, the outer periphery of the rotor blade in the case An annular flow path extending in the circumferential direction and through which air flows along the rotation of the rotor blade is provided at the fixed blade end of the rotary blade, and an exhaust port for discharging air to the outside is opened at the outer periphery of the annular flow path. An inlet is provided on the inner periphery of this annular flow path to take in air from the outside through the case that houses the adjacent pulley, allowing the air inside the case to be exchanged with outside air without reducing braking force, increasing the temperature. This is a slow descent machine that is characterized by preventing

[Effect]

The effect of this gradual descending machine is not necessarily clear, but
It can be considered as follows. In this slow descent aircraft, most of the outside air enters the case with wings from the intake port through the case containing the pulley, immediately flows through the annular flow path, and is then discharged from the discharge port. Therefore, the flow rate of circulating air flowing from the rotary blades to the fixed blades and returning to the rotary blades is not reduced.
Therefore, it is possible to prevent the braking force from decreasing as in the conventional case where a hole is simply provided in the case and the circulating air is 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〕

Embodiments illustrating the present invention will be specifically described below. In this slow descent machine, 10 is the fuselage body, and cup-shaped cases 1 are provided on both sides of the central member 12.
4 and 16 are attached. 18 is a pulley;
It is supported between the central member 12 and the case 14, and a rope 20 is wound around the outer periphery of the central member 12 in a spiral shape. There are four pressing rollers 2 on the outer periphery of the pulley 18.
2,... are provided, the lower ends of which are connected to the central member 12.
is supported by the case 14 and attached to an annularly connected plate array 24. When the hanging bracket 26 attached to the upper end of the plate array 24 is pulled, the pressing rollers 22, . . . pull the rope 20 to the pulley. Press it to 18. 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 that 28, . . . are guide rollers that guide the rope 20.

A gear 30 rotates together with the pulley 18, and this rotation is transmitted through gears 32, 34, and 36 at increased speed. 38 is a rotor blade, gear 3
6, the central portion between the central member 12 and the case 16 is rotated at high speed. A fixed blade 40 is provided on the outer periphery of the rotary blade 38 and on the inner surface of the case 16, and collides with air released by the rotary blade 38 at a speed in the rotational direction. Reference numeral 42 denotes a ventilation space, which 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. A rib 44 protrudes from the flat plate portion of the case 16 into the ventilation space 42, and arranges the air flow in a radial direction.

Reference numeral 46 denotes an annular flow path, which is provided at the end of the fixed blade 40 on the outer periphery of the rotor blade 38 in the case 16 and along the central member 12, extends in the circumferential direction, and is provided at a position along the central member 12.
Air flows along the rotation of the Reference numeral 48 denotes an exhaust port, which is formed between the central member 12 and the case 16 and communicates the annular flow path 46 with the outside. Reference numerals 50, .
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 transferred to the rotor blade 3.
8 is accelerated at high speed from the center, hits the fixed blade 40, circulates through the ventilation space 42, returns to the rotary blade 38, and applies a braking force to the rotary blade 38. Air entering the case 16 from the outside through the inlet 50 is turned into a rotating flow by the rotor blades 38, flows through the annular flow path 46, and is discharged from the outlet 48. Therefore, the flow rate of the circulating air is not reduced by the intake and exhaust air, and no reduction in braking force occurs. According to experiments, it took about 18 seconds to lower a 100 kg weight 15 meters with the outlet 48 closed with adhesive tape, whereas it took about 22 seconds to lower the same weight with the outlet open. If anything, the braking force increases.
It is presumed that this is because the annular 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 the circulating air and partially replaces it, the entire slow descent machine is naturally cooled.
When an experiment was repeated in which a 100Kg weight was lowered 15m, no temperature rise was observed. 50 again
When a similar experiment was conducted using a Kg weight, the temperature of the aircraft 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, causing the circulating air to perform a cooling cycle, and the cooling of this slow descent aircraft is extremely effective. It turns out that this is true.

〔Effect of the invention〕

As is clear from the above, in the present invention, an annular flow path is provided in the case, and this rotating flow path is provided with an exhaust port and an intake port, so that it is possible to prevent the temperature of the aircraft from rising without reducing the braking force. can. Moreover,
Since cooling is efficient, the opening to the outside can be made extremely small, preventing the intrusion of water and glass, without impairing the advantages of using a sealed case.

Therefore, according to the present invention, it is possible to realize a gradual descending machine that can be used for descending a heavier load and a longer distance.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a front sectional view, FIG. 2 is a sectional view taken along the line -- in the previous figure, and FIG. 3 is a sectional view taken along the line -- in FIG. 1. 10... Body, 12... Central member, 14... Case, 16... Case, 18... Pulley, 20...
... Rope, 22 ... Pressing roller, 24 ... Plate piece row, 26 ... Hanging fitting, 28 ... Guide roller, 3
0, 32, 34, 36...gear, 38...rotor blade, 40...fixed blade, 42...ventilation space, 46...
...Annular channel, 48...Outlet, 50...Inlet.

Claims (1)

[Claims] 1 A rope that is wrapped around a pulley and moves in a vine-like fashion with people hanging from both ends alternately.The movement of this rope rotates at high speed inside a sealed case with fixed wings, and the air inside the case is pumped by centrifugal force. In a slow descent aircraft having a rotary blade that generates a braking force by colliding with a fixed blade and then returning air from the fixed blade to the center through a ventilation space, a peripheral An annular flow path is provided that extends in the direction of the rotor and allows air to flow along the rotation of the rotor blade, an exhaust port that releases air to the outside is opened on the outer periphery of this annular flow path, and an exhaust port that releases air to the outside is opened on the inner periphery of this annular flow path. , an intake port that takes in air from the outside through the case containing the adjacent pulley, exchanges the air inside the case with outside air without reducing braking force, and prevents temperature rise. get off.