JPH057539A - Cord taking-up device for electric appliance - Google Patents

Abstract

PURPOSE:To provide a cord taking-up device for an electric appliance provided with a structure capable of receivably taking up even a cord having a large extended length in the orderly arranged state and further smoothly taking up and drawing out the cord. CONSTITUTION:A cord 6, after introduced from a reel guide part 3 into a cord reel part 4, is taken up from the inner periphery to the outer periphery of a lower stage 13 for taking up orderly the cord therearound, guided from the outermost periphery to the inner periphery along a guide part of a take-up position changeover stage 14 and then taken up from the inner periphery to the outer periphery of an upper stage 15 for taking up orderly the cord therearound. The stage change-over of the cord 6 from the lower stage 13 for taking up orderly the cord 6 to the take-up position changover stage 14 is performed by a stage changover mechanism 34 when the relative rotational frequency of a reel guide part 3 to the cord reel part 4 reaches a predetermined value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cord winding device mounted on an electric appliance such as a self-propelled cleaner.

[0002]

2. Description of the Related Art As a cord winding device of this type, for example, Japanese Patent Application Laid-Open No. 1-230323 (International Patent Classification A4)
7L 9/00).

This cord winding device is mounted on the bottom of a vacuum cleaner and has a cord reel as its main part. This cord reel is a disc-shaped one having a height dimension slightly wider than the thickness of the cord, and the cords are wound in a single-step aligned winding, that is, in a spiral shape in which they are further aligned in the same plane. It is said that.

Further, the cord winding device disclosed in Japanese Utility Model Publication No. 45-18979 (Japanese classification 60B011) is provided with a cord drum which is sufficiently wider than the thickness of the cord. An alignment guide made of a rotating plate is provided on the outer peripheral portion.

The alignment guide is rotated in synchronism with the rotation of the cord drum to control the winding position of the cord fed to the cord drum, whereby the cord is vertically arranged on the cord drum in multiple stages. It is arranged to be wound up in sequence.

[0006]

However, in any of these structures, there are problems as described below, and improvement thereof has been demanded.

That is, the former Japanese Patent Laid-Open No. 1-230323
In the structure disclosed in the publication, since the cord is wound in a single-stage aligned winding, the rate of increase in the outer diameter of the cord wound with the winding is very large, while the outer diameter of the cord reel is increased. The size, that is, the horizontal size is naturally limited due to the structure.

For this reason, the length of the cord to be wound is limited, and it cannot be applied to a cord having a large extension dimension.

Further, in the latter one having the structure disclosed in Japanese Utility Model Publication No. 45-18979, a longer cord can be wound as compared with the former one, but on the other hand, in the vertical direction in one cord drum. Since it is wound in several steps, it is difficult to obtain a vertically aligned state, and it is difficult to orderly arrange the cords even if the winding position of the cords is controlled by the alignment guide.

For this reason, the cord is not wound at a fixed position and falls down, or is partially biased, and the outer diameter of the cord is smaller than the height of the cord drum. I couldn't control it and couldn't accommodate a cord with such a large extension. Not only that, but in the worst case, the cord could get tangled and get caught, making it impossible to get in and out.

The present invention has been made in view of the above conventional problems, and by providing a step changeover mechanism, even cords having a large extension dimension can be wound and accommodated in an orderly manner and smoothly. An object of the present invention is to provide a cord winding device for an electric appliance having a structure capable of winding and pulling a cord.

[0012]

In order to achieve the above object, in the cord winding device of the present invention, the cord aligning winding stage for winding the cord into one stage aligning winding has a plurality of laminated layers through the winding position switching stages. And a reel guide portion that guides the cord into the cord reel portion are rotatably provided, and the cord is moved from the outermost periphery of the cord alignment winding stage to the winding position switching stage. The operation is performed by detecting a relative rotation number between the reel guide portion and the cord reel portion. Specifically, it is provided with a stage switching mechanism that shifts the cord from the outermost periphery of the cord alignment winding stage to the winding position switching stage, and the stage switching mechanism is provided between the reel guide portion and the cord reel portion. It is operated by a counter mechanism that detects the number of rotations.

Further, in the cord reel section, the cord alignment winding stages are concentrically arranged in a stacked state, and the winding position switching stages are disposed between adjacent cord alignment winding stages. This winding position switching stage includes a guide portion that guides the cord from the outermost circumference of one adjacent cord alignment winding stage to the inner periphery of the other cord alignment winding stage.

Here, the single-stage aligned winding means that the cord is wound in a spiral shape in which the cords are further aligned in the same plane.

[0015]

According to the present invention, the cord to be wound is:
After being guided from the reel guide to the inside of the cord reel and wound in a single-stage winding from the inner circumference to the outer circumference of one of the vertically adjacent cord-aligned winding stages, it is wound up along the guide part of the winding position switching stage. It is guided from the outer circumference to the inner circumference, and is further wound from the inner circumference to the outer circumference in the other cord alignment winding stage.

In this case, the transition of the cord from the outermost periphery of the cord-aligned winding stage to the winding position switching stage is performed by the stage switching mechanism. In this stage switching mechanism, the counter mechanism is provided between the reel guide portion and the cord reel portion. Detects the relative speed,
It operates when this relative rotation speed reaches a predetermined value.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a self-propelled cleaner having a cord retractor according to the present invention. This self-propelled cleaner has a cord retractor 2 at the bottom of a cleaner body 1.

The concrete structure of the cord winding device 2 is shown in FIGS. 2 and 3, and the cord winding device 2 comprises a reel guide portion 3, a cord reel portion 4 and a driving portion 5 as main parts.

The reel guide portion 3 guides the cord 6 into the cord reel portion 4 and is rotatably attached to the main body column 7 of the cleaner main body 1. That is,
In the reel guide portion 3, a disc-shaped reel guide 9 is fixed on a reel guide base 8, and a cylindrical reel guide cover 10 is provided on the outer peripheral edge of the reel guide 9.
Are integrally attached. The reel guide base 8 is rotatably supported by the main body column 7 via a bearing 11.

The reel guide cover 10 covers the outer periphery of the cord reel portion 4 and has an opening 10 at a part thereof.
A (see FIGS. 4 and 7) is provided, and the cord insertion / removal portion 9a of the reel guide 9 is provided facing the outside through the opening 10a. A guide roller mechanism 12 is provided on the cord entry / exit portion 9a.

As shown in FIG. 7, the guide roller mechanism 12 includes two vertical rollers 12a and 12a and two horizontal rollers 12b and 12b, and these rollers form a guide opening. The cord 6 can be moved up and down a little through the guide opening,
0a is guided into the reel guide cover 10.

The cord reel unit 4 is formed by integrally forming a lower cord alignment winding stage 13, a winding position switching stage 14, and an upper cord alignment winding stage 15 concentrically and in a laminated form. In other words, the winding position switching stage 14 is disposed between the pair of upper and lower cord alignment winding stages 13 and 15.

That is, these step structures 13, 14, 1
5 is four disk-shaped reel plates 16, 17, 1
8 and 19 are stacked via three reel drums 20, 21, and 22, and these reel supporters 23,
It is held integrally by 24.

A casing 25 is fixed to the upper reel supporter 23. The casing 25 and the lower reel supporter 24 are paired with a pair of upper and lower bearings 26, 26.
Is rotatably supported by the main body column 7.
As a result, the cord reel unit 4 is rotatable relative to the reel guide unit 3 and is rotationally driven by the drive unit 5.

In the drive unit 5, the driven large gear 27 is fixedly mounted on the casing 25, and the drive small gear 28 meshing with the driven large gear 27 is connected to the drive motor 30 via the clutch 29.
Will be linked to. By the drive unit 5, the cord reel unit 4 is rotationally driven in the cord winding direction (counterclockwise direction in FIG. 6) with a constant force. As a result, the cord 6 is given a constant tangential tension at the outermost circumference of the cord winding between the guide roller mechanism 12 and the outermost circumference of the cord reel portion 4 at that time. ..

The lower cord alignment winding stage 13 formed between the reel plates 16 and 17, and the reel plates 18 and 1.
The upper cord-aligned winding stages 15 formed between 9 function as the first and second cord winding portions, respectively.

These upper and lower cord alignment winding stages 13, 15
The height dimension of the reel is set to be slightly larger than the outer diameter of the cord 6 by the reel drums 20 and 22. The cords 6 are wound in a single-stage aligned winding in the space between the cord-aligned winding stages 13 and 15, that is, in a spiral shape in which they are further aligned in the same plane.

The winding position switching stage 14 formed between the reel plates 17 and 18 is the lower cord aligning winding stage 13 described above.
It has a function of guiding the cord 6 from the outermost periphery of the above to the inner periphery of the upper cord alignment winding stage 15. Lower reel plate 1
An introduction portion 17a is formed in a part of the outer periphery of 7 in a notched shape (see FIG. 8), and the cord 6 of the lower cord alignment winding stage 13 is introduced from here.

On the upper surface of the reel plate 17, a cord guide (guide portion) 31 continuous with the introduction portion 17a.
Is provided so as to extend spirally from the outermost circumference to the inner circumference. An inclined portion 32 for guiding the cord 6 to the upper cord alignment winding step 15 is provided at the inner peripheral end of the cord guide 15 (see FIG. 5). Correspondingly, the reel plate 18 of the upper cord alignment winding stage 15 is provided with a notch-shaped introducing portion 33 located above the inclined portion 32.

Further, on the upper surface of the reel plate 17, the stage switching mechanism 34 is provided on the inner peripheral side of the introduction portion 17a.
Is provided. Specifically, as shown in FIGS. 6 and 8, the stage switching mechanism 34 includes a solenoid 35, a connecting link 36, and a cord change lever 37.

The solenoid 35 is a lever mover 38.
Is provided with an operating core 35a fixed thereto and a return spring 35b for urging the operating core 35a in the retracting direction.
The actuating core 35a is in the pulled-out position when the solenoid 35 is in the non-excited state (non-actuated state), and is in the retracted position in the excited state (actuated state).

The connecting link 36 is composed of a rotatable first link 36a and a second link 36b which is movable in the radial direction of the reel plate 17, and these are linked by a support pin so as to be swingable. .. Also, the first link 3
6a is connected to the lever mover 38, and the second link 36b is connected to the code change lever 37.

As shown in FIG. 9, the cord change lever 37 is reciprocated by the second link 36b,
It is rotatable in the vertical direction. The cord change lever 37 is in the non-operating state (the solenoid 35 is in the non-excited state)
In the ascending position shown by the phantom line, while it is in the descending position shown by the solid line in the operating state (excitation state of the solenoid 35). Correspondingly, the reel plate 16 has a recess 16a for positioning the cord change lever 37.
Is provided.

The operation of the stage switching mechanism 34 is controlled by a counter mechanism 39 which detects the relative number of rotations of the reel guide portion 3 and the cord reel portion 4. This counter mechanism 3
9 includes locking teeth 39a, 39a, ..., Counting gear 39b and potentiometer 39c.

The locking teeth 39a are provided on the upper end portion of the reel guide cover 10 on the free rotation side.
In the illustrated example, three locations are provided at equal intervals in the circumferential direction (see FIG. 9).

The counting gear 39b is rotatably provided on the reel plate 19 on the driving and rotating side and is meshable with the engaging teeth 39a, 39a, .... In FIG. 6, reference numeral 40 is a ratchet mechanism for positioning the counting gear 39b. This ratchet mechanism 40
Is composed of a ratchet ball 40a engaged between the teeth of the counting gear 39b and a ratchet spring 40b for biasing the ratchet ball 40a in the direction of the counting gear 39b. This ensures that the counting gear 39b is rotated one tooth at a time. Positioned elastically at.

The potentiometer 39c is connected to the rotating shaft of the counting gear 39b, and the counting gear 3c
The reel guide portion 3 and the cord reel portion 4 from the rotation speed of 9b.
Calculate the relative rotation speed with. Potentiometer 39c
When the index value reaches the set value, the excitation signal for the solenoid 35 of the stage switching mechanism 34 is output. Since the potentiometer 39c reads the absolute value, even if the cord reel unit 4 rotates when the power is turned off, the relative rotation speed does not shift and the switching operation does not go wrong.

The above set values are used for the lower cord alignment winding stage 13
It is set in correspondence with the maximum number of cord windings of the cord 6 wound on.

That is, the manner of winding the cord 6 in the lower cord aligning winding stage 13 is such that the cord 6 is wound from the position of the outer peripheral surface of the reel drum 20 to the outermost periphery of the reel plate 16 in sequence. It corresponds to the relative rotation speed between the reel guide portion 3 and the cord reel portion 4 (difference in rotation speed between both portions). Therefore, the number of cord windings (maximum number of cord windings) when the cord 6 is wound to the outermost circumference of the reel plate 16 is preset as the set value.

In the cord winding device constructed as described above, when the cord reel portion 4 is rotated in the winding direction by the driving portion 5, the cord 6 is moved to the lower cord in the lower stage in the following manner. Alignment winding stage 13 → middle winding position switching stage 1
4 → Upper upper cord alignment winding stage 15 is sequentially guided and wound up (see FIG. 5).

The cord 6 is guided from the inner circumference to the outer circumference on the reel plate 16 of the lower cord alignment winding stage 13 while being guided by the guide roller mechanism 12 of the reel guide part 3 with a constant tension given by the driving part 5. Then, it is wound up in one step aligned winding.

During this time, the counter mechanism 39 determines the relative number of rotations of the reel guide portion 3 and the cord reel portion 4. The cord 6 is wound up to the outermost circumference of the reel plate 16, and the potentiometer 39 of the counter mechanism 39 is wound.
When the index value by c reaches the set value, the stage switching mechanism 34
The solenoid 35 is excited.

When the solenoid 35 is excited, its operating core 35a is pulled in against the elastic force of the return spring 35b. As a result, the code change lever 37 is rotated from the raised position indicated by the virtual line to the lowered position indicated by the solid line in FIG. 9 via the connecting link 36. Then, the cord 6 on the outermost periphery of the reel plate 16 is guided in the arrow direction so as to ride on the cord change lever 37, and is moved to the upper winding position switching stage 14.

Cord 6 transferred to winding position switching stage 14
Is guided from the outermost circumference to the inner circumference along the cord guide 31 (the winding position is switched), and then guided upward by the inclined portion 32 and introduced into the introduction portion 33 of the reel plate 18.
To the upper cord alignment winding stage 15 via.

The cord 6 transferred to the upper cord alignment winding stage 15 is wound on the reel plate 18 in a single-stage alignment winding from the inner periphery to the outer periphery.

The above-mentioned embodiment is a concrete example of the technical idea of the present invention.
The present invention is not limited to this, and various modifications can be made within the scope of the claims.

For example, the illustrated cord reel unit 4 is provided with two upper and lower cord alignment winding stages 13 and 15, but the number of the cord alignment winding stages can be increased according to the purpose. The winding position switching stage 14 is also increased correspondingly.

[0049]

As described in detail above, according to the present invention,
Various excellent effects as described below can be obtained.

A cord reel part, in which a cord-aligned winding stage for winding the cords in a single-stage aligned winding is provided in a plurality of stacked layers via a winding position switching stage, and a reel guide part for guiding the cords into the cord reel part. Since each of the cords is rotatably provided, it is possible to wind long cords aligned in a plurality of cord alignment winding stages.

That is, the cord to be wound up is guided from the reel guide portion into the cord reel portion, and is wound in one-stage aligned winding from the inner circumference to the outer circumference of one of the vertically adjacent cord-aligned winding steps. The wire is guided from the outermost circumference to the inner circumference along the guide portion of the winding position switching stage, and is further wound from the inner circumference to the outer periphery in the other cord alignment winding stage.

Therefore, by appropriately setting the cord alignment winding stage in accordance with the length of the cord to be wound,
Regardless of the size of the extension of the cord, it is possible to wind cords of various lengths, which is highly versatile.

Further, since the cord-aligned winding stage winds the cords into one-stage aligned winding, the cords can be arranged in an orderly manner, and the cords can be wound in a fixed position like the conventional method of winding up and down multiple stages. It does not collapse without being rolled or partially biased.
Therefore, it is possible to always smoothly and stably wind and pull out the cord.

Further, the movement of the cord from the outermost periphery of the cord-aligned winding stage to the winding position switching stage is performed by detecting the relative rotation speed between the reel guide portion and the cord reel portion, so that the position is always fixed ( The cord can be surely switched in the wound state of the cord, and the cord can be surely transferred from the cord-aligned winding stage to the winding position switching stage.

[Brief description of drawings]

FIG. 1 is a front view showing a self-propelled cleaner including a cord winding device that is an embodiment according to the present invention.

FIG. 2 is a front sectional view showing the cord winding device.

FIG. 3 is an enlarged front sectional view showing a main part of the cord winding device.

FIG. 4 is an exploded perspective view showing a main part of the cord winding device.

FIG. 5 is an exploded perspective view of a cord reel portion in the cord winding device, showing an entire path along which a cord is wound.

FIG. 6 is a plan view showing a stage switching mechanism and a counter mechanism in the cord winding device.

FIG. 7 is a perspective view showing a guide roller mechanism in the cord winding device.

FIG. 8 is a perspective view showing a transition path of a cord from a lower cord alignment winding stage to a winding position switching stage in a cord reel section of the cord winding device.

FIG. 9 is a partial cross-sectional side view for explaining the operation of the stage switching mechanism in the cord winding device.

[Explanation of symbols]

 1 Vacuum cleaner main body 2 Code winding device 3 Reel guide part 4 Code reel part 5 Driving part 6 Code 12 Guide roller mechanism 13 Lower cord alignment winding stage 14 Winding position switching stage 15 Upper cord alignment winding stage 16-19 Reel plate 20- 22 reel drum 29 clutch 30 drive motor 31 winding position switching stage code guide (guide portion) 34 stage switching mechanism 35 solenoid 36 connection link 37 code change lever 39 counter mechanism 39a locking tooth 39b counting gear 39c potentiometer

Claims (1)

Claim: What is claimed is: 1. A cord reel unit, comprising: a cord reel unit for winding a cord into a single-tier reel; And a reel guide portion for guiding the cord to each of them is rotatably provided, and the movement of the cord from the outermost periphery of the cord alignment winding stage to the winding position switching stage is performed by the reel guide part and the cord reel part. Is performed by detecting the relative number of revolutions of the cord.