JPS63123777A - Wind-up device having damping function - Google Patents

Abstract

PURPOSE:To prevent damage to a wind-up device itself and a base on which said wind-up device is installed and ensure safety by enabling automatic deceleration when an object to be wound begins to be wound at a speed above a defined speed. CONSTITUTION:By drawing out an object 9 to be wound, a return spring 7 is rotatably energized, and a rotary casing 1 is driven by utilizing this energized force, to automatically wind up the object 9 to be wound. In this wind-up action, as the rotary casing 1 is rotated in the winding direction, a lock mechanism by means of a coil spring 4 is operated to stop the rotation of a power receiving rotor 3. Due to the stop of rotation of the power receiving rotor 3, the rotting speed of the rotary casing 1 which is frictionally in contact with the rotor 3 is braked. Accordingly, if the object 9 to be wound begins to be wound at above a defined speed, automatic deceleration can be carried out, preventing damage to the wind-up device itself and a base A on which the wind-up device is installed, to ensure safety.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a winding device for winding and unwinding electrical cords, ropes, strings, bands, sheets, and the like.

<Conventional examples and problems> Electrical cords for vacuum cleaners and rice cookers, ropes or strings for drying clothes in laundry, strips such as tape measures, and pull-out devices such as screens and blinds installed in train windows. However, there are some that can be rolled up and stored using the force of the spring.

However, with these conventional devices, the winding speed gradually increases as the winding progresses, and the material to be wound reaches a considerable speed at the end of winding. If a stopper is provided, this will collide with the entrance/exit of the storage portion with considerable force.

If this is done repeatedly, the end stopper may be damaged or the storage opening may be damaged.

Furthermore, the ends of the material to be wound may hit and injure people, which is unfavorable from a safety standpoint.

Means for Solving the Problems> The present invention was proposed to solve the above-mentioned drawbacks, and its purpose is to automatically prevent the material from being wound when the material to be wound exceeds a predetermined speed. To provide a winding device having a damper function that can reduce the speed of the winding device, prevent damage to the winding device itself and the base on which it is mounted, and ensure safety.

In order to achieve the above object, the present invention provides: a fixed shaft fixed to a base; a rotating casing having a hollow interior and rotatably supported by the fixed shaft; a force-receiving rotor rotatably provided on the fixed shaft via a locking mechanism; a flexible O-ring for press-contact braking installed between the rotary casing and the force-receiving rotor; The winding device has a damper function and includes a return spring that rotates and a drum body that winds the material to be wound.

Function> The winding device of the present invention rotates the return spring by pulling out the object to be wound, and uses this urging force to drive the rotating casing to automatically move the object to be wound. It is configured to be wound up, and in this winding operation, the winding speed is controlled.

In other words, when the rotating casing rotates in the winding direction,
The locking mechanism acts to stop the rotation of the force-receiving rotor.

Then, by stopping the rotation of the force-receiving rotor, the rotational speed of the rotating casing that is in frictional contact is braked.

<Example> Next, the present invention will be explained based on an example shown in the drawings.

(1) is a rotating casing in the winding device, which has a hollow inner chamber (11) and is formed into a substantially cylindrical shape. (1
2) is a shaft hole provided at one end of the rotating casing (1), into which the fixed shaft (2) serving as the center of rotation is inserted.

This fixed shaft (2) is fixed via a mounting member (B) to a base (A) on which a winding device, which is an electric appliance or other instrument, is set.

(3) is a force-receiving rotor, which is installed in a hollow inner chamber (11) and is arranged to be able to rotate in forward and reverse directions, and one end of a coil spring (4) for a locking mechanism is locked in a part of the rotor. A recess (31) is formed for this purpose.

The other end of the coil spring (4) is a free end, and the inner surface of the coil forming portion is in contact with the fixed shaft (2). The coil spring (4) and the fixed shaft (2) are locked when the coil spring rotates in the direction of winding and tightening around the fixed shaft due to the frictional force at the contact portion, and when the coil spring rotates in the opposite direction, It is configured not to lock.

(5) is the inner wall surface of the rotating casing (1) and the force-receiving rotor (
These are flexible O-rings made of elastic rubber or synthetic resin that are interposed between the outer peripheral surface of the rotor (3) and are fitted onto the outer peripheral surface of the force-receiving rotor (3) adjacent to each other. At the same time, movement in the axial direction is restricted by the stepped portion (32).

(6) is capable of rotating the rotating casing (1) with respect to the fixed shaft (2) on the side opposite to the side where the shaft hole (12) is provided, and the force-receiving rotor (3) in the hollow inner chamber (11). )
This is an end member that rotatably supports the.

Liquid (L) such as oil is injected between the two O-rings (5) on the inner wall surface of the rotating casing (1) and the outer peripheral surface of the force-receiving rotor (3), and the rotating casing (1) is rotated once.
In cases where the and force-receiving rotor (3) rotate independently of each other, if the liquid resistance of the liquid is used for control, wear of the members will be less than when only O-rings are used, and the rotational speed will be increased. This makes it possible to reliably perform braking even when the amount of brake has reached a considerable level, which is more preferable.

(7) is a return spring, one end of which is fixed to the rotating casing (1), and the other end fixed to the fixed shaft (2).

(8) is a drum body fixed to the rotating casing (1), and one end of the material to be wound (9) is fixed to this drum body so that winding and unwinding can be performed. In order to fix the material to be wound (8) to the drum body (8), as shown in FIG.
13), and a concave fitting part (81) formed on the drum body (8) is disposed in this concave groove (13), and the end of the material to be wound is disposed in this concave fitting part (81). is inserted and clamped and fixed from the outside by the pressing locking member (82).

When the material to be wound (9) is pulled out, the rotating casing (1) rotates, and rotational force is applied to the return spring (7).

At this time, the rotating casing (1) and the force-receiving rotor (3) rotate together. At this time, the coil spring (0) interposed between the force-receiving rotor (3) and the fixed shaft (2) is rotated in a direction in which it does not wind around the fixed shaft. Therefore, the drum body (8) of the winding device When rotating in the return direction,
The locking action by the coil spring (4) is not performed.

Conversely, when winding the material to be wound (8), the coil spring (4) is rotated in the direction in which it is wound around the fixed shaft (2), thereby performing a locking action.

Now, let the material to be wound (8) that has been pulled out be in a free state,
The rotating casing (
1), the drum body (8) fixed thereto is rotated at the same time.

At this time, the force-receiving rotor (3), which is sandwiched between the O-rings (5) (5), is rotated at the same time, albeit slightly.

At this time, the coil spring (4) is also attached to the fixed shaft (2).
The coil spring (4
) is wound around the fixed shaft (2) due to the frictional force of the part that is in contact with it.

This winding prevents the coil spring (4) from rotating, and this one end is fitted into the force receiving rotor (3).
rotation is prevented.

When the rotation of the force-receiving rotor (3) is prevented, the rotating casing (1), which is sandwiched therewith via the O-ring (5), is braked and its rotational speed is reduced.

In the above embodiment, a coil spring is used as the return spring (7), but the present invention is not limited to this.
Of course, it is also possible to use a thinly wound spring.

This winding device can be used for electric cords for vacuum cleaners, rice cookers, etc., ropes for drying clothes in laundry, strips for tape measures, etc., blinds installed on screens and train windows, and other screen doors. The net is wound up and unwound by a drum body (8), a sash member is attached to the moving edge of the net, and a flexible member is attached to the upper and lower edges of the net by the drum body (8). A rollable edge member may also be provided.

Effects> According to the present invention, the winding speed of the material to be wound is automatically reduced to prevent a large impact at the final stopping point. There will be no damage to the parts such as the entrance and exit of the material to be wound on the base on which the take-up device is installed, and even if the moving edge part hits, the force will be reduced, so there will be no injury to humans. Safety can be ensured by eliminating the need to give

This winding device is not limited to the specific instruments mentioned above, but can be applied to a variety of other devices, and has a wide range of uses and practical value.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a central vertical cross-sectional view with a part omitted of a winding device according to the present invention, and FIG. 2 is a cross-sectional view taken along the line n--■. (1)... Rotating casing, (2)... Fixed shaft, (3)... Force receiving rotor, (4)... Coil spring, ( 5)...
...O ring, (7) ...Return spring, (8) ...Drum body.

Claims (1)

[Claims] 1. A fixed shaft fixed to a base; a rotating casing having a hollow interior and rotatably supported by the fixed shaft; A force-receiving rotor rotatably installed on a fixed shaft via a locking mechanism, a flexible O-ring for pressure braking installed between the rotary casing and the force-receiving rotor, and a rotary drive rotor for rotating the rotary casing. A winding device having a damper function, comprising: a return spring for tightening the winding material; a drum body for winding the material to be wound; 2. A winding device having a damper function according to claim 1, wherein the locking mechanism is provided so that it can act only in one of the forward and reverse rotational directions of the force receiving rotor with respect to the fixed shaft. . 3. The locking mechanism is made of a coil spring, one end of which is fixed to the force-receiving rotor, and the other end is a free end, and is arranged so that the fixed shaft is inscribed and rotatable. A winding device having a damper function according to claim 2.