JPH0515028Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a speed governor for controlling the opening speed of a smoke exhaust window.

Prior Art Conventionally, windows that fold inwards or windows that fold outward have been widely used as smoke exhaust windows. This smoke exhaust window is located at a relatively high location, so it is opened and closed using ropes. When closing a window, you pull a rope, and when you open a window, you let out a rope so that the shoji falls under its own weight.

With such smoke exhaust windows, when the window is opened, the shoji is accelerated by its own weight, and a large impact may be applied to the shoji and the window may be damaged.

In order to solve these problems, the special public
The invention disclosed in Publication No. 14020 is disclosed. This invention constantly applies a brake to the shaft around which the rope is wound, using a spring, to prevent the rope from being let out too quickly.

Problems to be solved by this invention With the above configuration, the brake is applied from the moment the shoji starts to fall until the end.
It will take a long time for the shoji to fall down.

Such a smoke exhaust window poses a problem in that smoke cannot be quickly exhausted in an emergency such as a fire.

Also, although the impact applied to the shoji is somewhat softened, it is inevitable that the shoji will receive an impact if the shoji's kicking device or its own weight generates acceleration.

Means for Solving the Problems The speed regulating device for a smoke exhaust window according to this invention has a winding drum around which a smoke exhaust window opening/closing rope is wound, and an axially intermediate portion of a rotating shaft that meshes with a gear. A brake disc extending toward the outer circumference is fixed, and a propulsion blade is attached to a rotating shaft via a one-way clutch.
The propulsion vanes are arranged in an oil chamber containing viscous oil,
As the winding drum rotates, the rotating shaft rotates, and the propulsion force of the propelling blades causes the brake disc to come into sliding contact with the corner wall forming the oil chamber of the case.

When the rotation of the rotating shaft is accelerated, the propulsive force increases, and the frictional force between the brake disc and the case increases, thereby braking the opening speed.

Embodiment Hereinafter, this invention will be explained in detail based on an embodiment shown in the drawings.

In FIG. 2, reference numeral 1 denotes a smoke exhaust window, and a plurality of shoji 2 are attached to a window frame 3. The shoji 2 can be folded inward or outward, and can be opened and closed by a rope 4 attached to the upper end of the shoji 2.

The end of the rope 4 is fixed to the outer periphery of a winding drum 6 housed in a case 5 so that it can be wound. The case 5 consists of a case body 7 and a cover 8, and a shaft 9 of a winding drum 6 is pivotally supported by the case body 7 and the cover 8. A large-diameter gear 10 is formed at one end in the axial direction of the winding drum 6, and a disk-shaped presser plate 11 is formed slightly apart from the gearwheel 10 and extends toward the outer circumference. The rope 4 is wrapped around the rope. A handle 12 is attached to the portion of the shaft 9 that passes through the cover 8, and by rotating the handle 12, the winding drum 6 is rotated.

A gear 13 is rotatably supported on the back surface of the cover 8 and meshes with the gear 10 of the winding drum 6.

The gear 13 and the gear 15 of the rotating shaft 14 mesh with each other. The rotating shaft 14 is pivotally supported at both ends by the cover 8 of the case 5 and the case body 7, and one end passes through the center of a circular oil chamber 16 formed in the case body 7. A gear 15 is attached to the outer periphery of the rotating shaft 14 at an end opposite to the oil chamber 16 side, and meshes with the gear 13.

Therefore, the rotation of the winding drum 6 is transmitted to the rotating shaft 14 via the gears 10, 13, and 15.

A brake disk 17 in the form of a disc extending toward the outer circumference is fixed to the axially intermediate portion of the rotating shaft 14.
A partition wall 18 forming an oil chamber 16 of the brake disc 17
A friction material 19 is attached to the outer periphery of the surface facing the. Cork or leather is used as the friction material 19. Similarly, a recess 20 is formed in the outer periphery of the rotating shaft 14 on the surface facing the partition wall 18, and a spring 21 is housed in the recess 20 between it and the partition wall 18.

A plurality of propulsion vanes 23 are attached to the outer periphery of the portion of the rotating shaft 14 housed in the oil chamber 16 via a one-way clutch 22 in the outer periphery direction. The one-way clutch 22 transmits the rotation of the rotary shaft 14 to the propulsion blades 23 in only one direction.
The rotation of the rotating shaft 14 is transmitted to the propulsion blades 23.

A viscous oil 24 is stored in the oil chamber 16.
As the viscous oil 24, silicone oil with a viscosity of 500 is used. When the propulsion blade 23 rotates in the oil chamber 16, it pushes away the viscous oil 24 and the brake disc 17
propels the rotating shaft 14 in a direction approaching the partition wall 18.

An oil seal 25 is interposed between the partition wall 18 and the rotating shaft 14.

Next, the operating state of the speed governor having the above configuration will be explained.

When opening the smoke exhaust window, the handle 12 is unlocked so that the winding drum 6 can freely rotate. When the shoji 2 tries to fall down due to its own weight, the rope 4 is let out and the wrapping drum 6 rotates. Along with this, the rotating shaft 14 rotates via the gears 10, 13, and 15.

When the rotation of the rotating shaft 14 is accelerated, the propulsion blades 23
As the propulsive force increases, the friction material 19 of the brake disc 17 comes into sliding contact with the partition wall 18, generating a frictional force and braking the rotation of the rotating shaft 14. When the rotation of the rotating shaft 14 is braked, the rotation of the winding drum 6 is also suppressed via the gears 10, 13, and 15, and the rope 4 is slowly let out. Therefore, the shoji 2 falls down at a low speed, receives less impact when opened, and is less likely to be damaged.

When closing the smoke exhaust window, the handle 12 may be turned to wrap the rope 4 around the wrapping drum 6. Since this rotary shaft 14 rotates in the opposite direction when opening, the propulsion blade 23 is rotated by the one-way clutch 22.
does not rotate, and no load is placed on the rotation of the winding drum 6.

Effects of the invention This invention has the above-mentioned configuration, and a brake disc and a propulsion blade are attached to the outer periphery of the rotating shaft that meshes with the winding drum through gears, and the rotating shaft rotates as the winding drum rotates. The propulsion force that displaces the viscous oil in the oil chamber causes the brake disc to slide into contact with the case, and the opening speed is braked by frictional force. Therefore, the rotation of the rotating shaft is accelerated, the propulsive force increases, and the brake disc and the case come into contact to generate braking force, and since the braking force acts according to the rotational speed, it is always below a certain level. It is possible to open the window at a speed of

[Brief explanation of the drawing]

Figure 1 is a perspective view of essential parts of an embodiment of the speed governor for a smoke exhaust window according to this invention, Figure 2 is a front view of the smoke exhaust window, and Figure 3 is a front view of the speed governor. Figure 4 is the third
It is a sectional view taken along the line - in the figure. 1...Smoke exhaust window, 2...Shoji, 3...Window frame, 4
... rope, 5 ... case, 6 ... winding drum,
10... Gear, 13... Gear, 14... Rotating shaft,
15... Gear, 16... Oil chamber, 17... Brake disk, 18... Partition wall, 19... Friction material, 20... Recess, 21... Spring, 22... One-way clutch, 23... Propulsion vane , 24...Viscous oil.

Claims (1)

[Scope of utility model registration request] A winding drum 6 around which the smoke evacuation window opening/closing rope 4 is wound, and the rotation of this winding drum 6 are connected to gears 10 and 1.
3, 15,
A brake disc 17 extending outwardly is fixed to the axially intermediate portion of the rotating shaft 14, and a propulsion blade 23 is attached to the rotating shaft 14 via a one-way clutch 22. The rotary shaft 14 rotates with the rotation of the winding drum 6, and the brake disc 17 slides against the corner wall 18 forming the oil chamber 16 of the case due to the propulsive force of the propulsion blades 23. A speed regulating device for a smoke exhaust window, characterized in that: