JPS597031B2 - Torque adjustment device for mainspring spring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a structure in which a barrel 2 is rotatably disposed within a mounting frame 1, and a shaft 3 disposed at the axis of the barrel 2 is rotatably and slidably inserted into the mounting frame 1. , a mainspring spring 4 installed inside the barrel 2
One end is fixed to the barrel 2, and the other end is fixed to the shaft 3,
A locking protrusion 5 is provided on the shaft 3 in a direction perpendicular to the shaft 3, and the mounting frame 1
Stepped portions 6a, 6b... are provided on the outer periphery of the shaft 3 in the shape of steps that gradually become higher in the direction of unwinding of the mainspring spring 4, and each stepped portion 6a, 6b... Locking grooves 7a, 7b in which the locking protrusion 5 can lock are provided, and a pressing spring biases the locking protrusion 5 so that it locks in the locking grooves 7a, 7b. This invention relates to a torque adjustment device for a mainspring spring device, which is characterized in that the torque adjustment device 8 is mounted on the shaft 3.

In the conventional mainspring spring torque adjustment device, the first
As shown in the figure, a locking protrusion 5 was provided on the shaft 3, a locking groove 9 was provided on the mounting frame 1, and a mainspring spring was housed inside the barrel 2 provided on the mounting frame 1.

In such a conventional example, the mainspring torque is adjusted while the locking protrusion 5 is locked in the locking groove 9. However, since the circumference of the locking groove 9 is flat, the shaft 3 cannot be rotated (winded or wound). When unwinding), if the torque is strong, the unwinding force is applied to the shaft 3, and the unwinding occurs suddenly, making delicate adjustments impossible or potentially dangerous.

The present invention has been made in view of the above points, and an object of the present invention is to provide a mainspring spring device with a torque that does not cause unnecessary unwinding even when adjusting the torque in a state where the mainspring torque is strong. To provide a regulating device.

The present invention will be explained in detail below with reference to Examples.

A shaft 3 is rotatably and slidably inserted into a mounting frame 1 having a substantially inverted U shape, and a barrel 2 located on the outer periphery of the shaft 3 is rotatably attached to the mounting frame 1. One end of the internal mainspring spring 4 is fixed to the barrel 2, and the other end of the mainspring spring 4 is fixed to the shaft 3.

A cable 10 like steel tape is attached to the outer circumference of this barrel 2.
It is wrapped around.

A flange 11 is provided around one end of the shaft 3, and a driver groove 12 is bored in the top surface of the flange 11.

A pair of locking protrusions 5 are provided on the other end of the shaft 3 by inserting a pin therethrough, and the shaft 3 opposite to the flange 11 of the mounting frame 1 is provided with a pair of locking protrusions 5.
On the outer periphery of the mainspring spring 4, stepped portions 5a, 5b, etc. are provided in the form of steps that gradually become higher in the unwinding direction.
Each stepped surface portion 6a, 6b, . . . is provided with locking grooves 7a, 7b, . . ., in which the locking protrusion 5 can be locked.

Further, a pressing spring 8 is interposed between the flange 11 and the mounting frame 1 to bias the shaft 3 so that the locking protrusion 5 is locked in the locking grooves 7a and 7b.

The mainspring spring device constructed as described above is used in an automatic door closing device as shown in FIG.

Reference numeral 13 is a lintel, with a rail 1 provided in the longitudinal direction at the bottom.
4, the upper ends of a pair of sliding doors 15 like shoji screens are slidably fitted.

Pulleys 16 and 16 are rotatably mounted on both ends of the lintel 13, and a wire 1 is connected between the pulleys 16 and 16.
7 is spanned in a ring shape, and both ends of the wire 17 are connected to a connecting fitting 18.

One end of the wire 17 is connected to a connecting fitting 18 via a spring 19 to keep the tension of the wire 17 constant.

An inverted U-shaped mounting portion 21 at the upper part of the engagement piece 20 is slidably attached to the wire 17 at a proper position.

An engagement hole 24 is bored at the upper end of the vertical frame 23 at the intersection of the upper frame 22 and the vertical frame 23 of the sliding door 15, and an engagement piece 20 is inserted into each engagement hole 24. .

Further, a fixing piece 25 is attached to the wire 17, and the fixing piece 25 and the engaging piece 20 are connected by a coil spring 26.

Inside the lintel 13, there are arranged the above-mentioned mainspring spring device of the present invention and a damper device 27 that operates as a resistance only when the sliding door 15 is closed.

The other end of the cable 10 of the mainspring spring device is fixed to a connecting fitting 18.

Next, the operation of the automatic door closing device constructed as described above will be explained.

When the right sliding door 15 is opened to the left, the wire 17 moves clockwise.

Then, the connecting fitting 18 also moves, tightening the main spring 4 of the main spring device and extending the cable 10.

When the hand to open the sliding door 15 is released, the connecting fitting 18 and the wire 17 are moved in the opposite direction by the force of the main spring 4 of the main spring device.

Then, the speed is controlled by the damper action of the damper device 27 to close the sliding door 15.

In addition, when adjusting the torque of the mainspring spring device of the present invention, as shown in FIG.
7b..., rotate the shaft 3 in the A or A' direction, and insert the locking protrusion 5 into the appropriate locking groove 7a, 7b.
to lock.

At this time, even if a large unwinding torque acts in the direction B shown in FIG.
. . . Hits the intermediate stage 6a't6b' . . . and does not return.

As described above, the present invention provides stepped portions on the outer periphery of the shaft of the mounting frame in a step-like manner that gradually increases in height in the unwinding direction of the mainspring, and each stepped portion has a locking groove in which the locking protrusion can lock. is provided, so that when the shaft is rotated to adjust the torque when the mainspring torque is strong, even if the shaft tries to rotate in the direction of unwinding the mainspring spring, the locking protrusion will stop at the step between the step surface parts. This allows adjustment without unnecessary unwinding, and also reduces the force supporting the shaft.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventional example, Fig. 2 is an exploded perspective view of an embodiment of the present invention, Fig. 3 is a perspective view of the same shaft as seen from another direction, and Fig. 4 is an assembled state of the same. FIG. 5 is a perspective view of FIG. 4 seen from another direction, and FIG. 6 is a perspective view of the same automatic door closing device as shown in FIG. , 3 is a shaft, 4 is a spring spring, 5 is a locking protrusion, 6a,
6b... is a step surface portion, 7a and 7b are locking grooves, 8
It is a pressure spring.

Claims (1)

[Claims] 1. Place the barrel in a rotatable manner within the mounting frame, insert the shaft provided at the core of the barrel into the mounting frame in a rotatable and slidable manner, and secure one end of the mainspring spring housed inside the barrel to the barrel. At the same time, the other end is fixed to the shaft, a locking protrusion is provided on the shaft in a direction perpendicular to the shaft, and a stepped portion is provided on the outer periphery of the mounting shaft in the shape of a step that gradually becomes higher in the direction in which the mainspring spring is unwound. , characterized in that a locking groove into which the locking protrusion can be locked is provided on each stepped surface, and a pressing spring is attached to the shaft to urge the locking protrusion to lock in the locking groove. A torque adjustment device for a mainspring spring device.