JP3475823B2 - Elevating clothes dryer - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting and lowering apparatus.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 14 and 15, a pair of left and right pantograph-type telescopic arms for suspending a clothesline 9 in a storage box 2 attached to an opening 85 in the ceiling and opened downward. The upper end of 80 is attached, the rotating drum is rotated by the motor 4, and the wire 11 is wound or unwound to store the pantograph-type telescopic arm 80 in the storage box 2 or to extend it below the storage box 2. In addition, there is known an elevating clothes-drying device 1'wherein the clothes-drying rod 9 can be vertically moved up and down in a room.

[0003]

However, when the conventional pantograph type telescopic arm 80 is used, the storage box 2 is used to fold and store the telescopic arm 80.
Has the drawback of becoming larger. Moreover, conventionally, when the clothesline 9 is stopped at the lower limit position of the normal operation, for example, when the clothesline 9 is pulled down by hand, the rotating drum rotates and the wire 11 is completely unwound from the rotating drum. There is a problem that it is entangled with a rotating drum or the like and causes a malfunction. In addition, a speed reducer composed of a spur gear train is usually provided between the motor 4 and the rotating drum, and the clothes-drying rod 9 is stopped even if the clothes-drying rod 9 is stopped at the lower limit position of the normal operation. When is pulled down by hand, an unreasonable load is applied to the spur gear train, and the durability of the spur gear train also deteriorates.

The present invention has been made in view of the above points, and it is an object of the present invention to achieve downsizing and to control the lowering operation of a clothesline at a normal lower limit position. An object is to provide a lifting and lowering device which can improve the durability of a gear train, and further to provide an lifting and lowering device which is capable of restricting a lifting operation of a clothesline at a normal upper limit position.

[0005]

In order to solve the above-mentioned problems, the present invention connects a wire 11 for suspending a clothesline 9 to a rotary drum 3 which is rotated by a motor 4, and rotates the rotary drum 3 to rotate the wire 11. It is a lifting and lowering device for lifting and lowering a clothesline 9 by winding or unwinding the motor. The motor output shaft 6 and the drum rotary shaft 7 are connected via a spur gear train 13 for deceleration, and a spur gear train The pinion 15 having the stopper 16 is provided on the shaft portion of any one of the spur gears 12a to 12b constituting the pinion 13, and the pinion 1 is provided with the stopper receiver 18.
Pinion 1 with stopper gear 17 that has a different gear ratio from 5
5, the stopper 16 does not come into contact with the stopper receiver 18 during normal lifting and lowering of the clothes-drying rod 9, and the clothes-drying rod 9
The gear ratio of the pinion 15 and the stopper gear 17 is set so that the stopper 16 hits the stopper receiver 18 to prevent the clothes rod 9 from moving downward when at least lower than the lower limit position. With such a configuration, when the clothesline 9 is at the lower limit position, the stopper 16 hits the stopper receiver 18 to stop the rotation of the pinion 15 when the clothesline 9 is pulled down by hand, and the drum rotation shaft 7 moves to that position. As a result, it is no longer possible to rotate, there is no concern that the wire 11 will be completely unwound from the rotary drum 3 and will be entangled with the rotary drum 3, and there is no possibility of causing malfunction. Moreover,
Since the rotation of the drum rotating shaft 7 is stopped by the stopper gear 17, the load applied to the spur gear train 13 for reduction interposed between the drum rotating shaft 7 and the motor output shaft 6 becomes small, and the spur gear train 13 The strength of can be guaranteed. further,
Since the structure which hangs the clothes-drying rod 9 with the wire 11 is adopted, the entire apparatus can be made compact as compared with the conventional case in which the pantograph is folded and stored.

Further, the gear ratio between the pinion 15 and the stopper gear 17 is set so that the stopper 16 hits the stopper receiver 18 to prevent the clothes rod 9 from moving upward when the clothes rod 9 is lifted above the upper limit position. In this case, when the clothesline 9 does not stop at the upper limit position of normal operation, the stopper gear 17 stops the rotation of the pinion 15 and the drum rotation shaft 7 cannot rotate any more. Therefore, it is possible to prevent the laundry pole 9 from being overloaded beyond the upper limit position and being caught by the opening edge of the ceiling, the decorative cover, or the like, so that the spur gear train 13 is overloaded.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described. As shown in FIG. 2, a lifting and lowering apparatus 1 is driven in a storage box 2 which is attached to an opening of a ceiling and which is opened downward. A DC motor 4 (hereinafter abbreviated as a motor) as a source, a control unit 50 for controlling the motor 4,
A power transformer 10 for supplying a direct current to the motor 4 is housed therein, and a wire 11 for hanging the clothesline 9 is wound around the rotary drum 3, and the wire 11 is wound or unwound by rotation of the rotary drum 3 to dry clothes. Pole 9
Can be moved up and down. In FIG. 2, reference numeral 51 is a pulley around which the wire 11 is wound, and 52 is a remote control light receiving unit.

A spur gear train 13 for speed reduction is interposed between the motor output shaft 6 and the drum rotation shaft 7, as shown in FIGS. In this example, the spur gear train 13
A front spur gear 12a provided on the motor output shaft 6,
It consists of a spur gear 12b at the rear stage provided on the drum rotary shaft 7 and a plurality of intermediate spur gears 12c. The rotational force of the motor output shaft 6 is reduced by the spur gear train 13 and transmitted to the drum rotary shaft 7. ing.

Here, any one of the spur gear trains 13
Shaft 1 of two spur gears (in this example, the rear spur gear 12b)
4 includes a pinion 15 as shown in FIGS. 1, 3 and 4.
Is attached. A gear 17 for a stopper having a gear ratio different from that of the pinion 15 meshes with the pinion 15. The shaft portion 17a of the stopper gear 17 is axially supported by the gear case 19 in parallel with the shaft portion 15a of the pinion 15. The pinion 15 is integrally provided with a convex stopper 16, and the stopper gear 17 is integrally provided with a convex stopper receiver 18 for receiving the stopper 16. In this example, as shown in FIG. 13, the tip surface 18a of the stopper receiver 18 is made to contact the side surface 16a of the stopper 16. When the clothesline 9 is normally moved up and down, the stopper 16 stops the stopper 18
The gear ratio of the pinion 15 and the stopper gear 17 is set so that the stopper 16 contacts the stopper receiver 18 at both the lower limit position and the upper limit position of the clothesline 9 without hitting. For example, the gear ratio is set such that the pinion 15 rotates 8 times while the stopper gear 17 rotates 1 time. Of course, the gear ratio is not limited to 1: 8, and the point is that the gear ratio is such that the stopper 16 contacts the stopper receiver 18 at least at the lower limit position of the clothesline 9.

The stopper gear 17 is provided with position detecting means 20 for optically detecting the lower limit position and the upper limit position of the clothes rod 9. Here, the upper limit position refers to a position P1 (FIG. 2) in which the clothesline 9 is stored in the storage box 2, and the lower limit position refers to a position p2 (FIG. 2) in which the laundry is hung on the clothesline 9 and the upper limit position. I try to dry the laundry midway between the lower limit position and the lower limit position. The position at which the laundry is dried can be arbitrarily set by the stop switch of the remote controller.

The position detecting means 20 is shown in FIG.
As shown in FIG. 2, a light shield plate 39 is provided on one surface of the stopper gear 17 so as to project in a substantially circular arc shape concentric with the stopper gear 17, and a normally open type photo interrupter 43 fixed to the gear case 19a side. It is configured.
The light shield plate 39 does not pass between the photo interrupters 43 when the clothesline 9 is normally moved up and down, and the motor 4 can be driven. When the light shield plate 39 reaches the lower limit position and the upper limit position, the light shield plate 39 is interposed between the photo interrupters 43. It is configured so that the motor 4 is stopped when the motor 4 is turned on.

However, when the motor 4 is driven, the rotational force of the motor output shaft 6 is decelerated by the spur gear train 13 and transmitted to the drum rotary shaft 7, and the rotary drum 3 rotates, and the wire 1
By winding or unwinding 1, the clothesline 9 is moved up and down. At this time, the pinion 15 provided on the subsequent stage spur gear 12b directly connected to the drum rotation shaft 7 rotates, and the stopper gear 17 meshing with the pinion 15 and having a different gear ratio is slower than the pinion 15. Rotate. Here, FIGS. 5C to 5H show the positional relationship between the stopper 16 and the stopper receiver 18 at an intermediate position between the lower limit position and the upper limit position. Note that θ2 to θ7 in FIG. 5 are, for example, 40 ° to 240 °.

After that, when the clothesline 9 descends to the lower limit position, the light shield plate 39 shown in FIG. 3 enters between the photo interrupters 43, the driving of the motor 4 is stopped, and the clothesline 9 stops at the lower limit position. At this stage, as shown in FIG. 5B, the stopper 16 and the stopper receiver 18 are not yet in contact with each other. Θ1 in FIG. 5B is, for example, 20 °. After that, when the clothesline 9 is stopped at the lower limit position of the normal operation and when it is pulled downward by the hand, the pinion 15 rotates slightly and as shown in FIGS. 1 (a) and 5 (a). In addition, the stopper receiver 18 of the stopper gear 17
The side surface 16a of the stopper 16 of the pinion 15 hits the tip surface 18a of the pinion 15 to stop the rotation of the pinion 15, and the drum rotation shaft 7 cannot rotate any more.

As described above, any one of the spur gear trains 13 constituting the drive unit of the wire-hanging type lifting / lowering apparatus 1
Pinion 15 with stopper 16 on two spur gears 12b,
This pinion 15 has a stopper receiver 18 with a different gear ratio.
Although it has a simple structure in which the attached stopper gear 17 is engaged, the lower limit of the clothesline 9 is regulated (for example, 5
7 cm), so even if you pull it down by hand at the lower limit or add weight to the laundry,
As shown in (b), there is no fear that the wire 11 is completely unwound from the rotary drum 3 or entangled with the rotary drum 3, and there is no possibility of causing malfunction.
Here, in order to increase the tensile strength of the wire 11, FIG.
As shown in (a), the lower limit (or upper limit) of the clothesline 9
In the above, it is desirable to set the attachment position of the wire 11 so that the rotating drum 3 stops with one end of the wire 11 wound around the rotating drum 3 for about half a turn.
This can eliminate the possibility of causing a malfunction.

Moreover, since the stopper gear 17 stops the rotation of the drum rotary shaft 7, the drum rotary shaft 7
The load applied to the spur gear train 13 for deceleration connected to is reduced, and the strength of the spur gear train 13 can be guaranteed. Furthermore, the wire suspension type has an effect that the entire apparatus can be made compact as compared with the conventional case in which the pantograph is folded and stored.

Also, when the clothesline 9 is raised to the upper limit position, the light shielding plate 39 shown in FIG. 3 enters between the photo interrupters 43 and the driving of the motor 4 is stopped, so that the clothesline 9 is at the upper limit position. Stop. At this stage, as shown in FIG. 6A, the stopper 16 and the stopper receiver 18 are not yet in contact with each other. Θ8 in FIG. 6A is about 275 °, θ
9 is about 283 °. Then, when the clothesline 9 does not stop at the upper limit position of the normal operation and the clothesline 9 is lifted further due to a runaway of the control unit 50, the pinion 15 slightly rotates and the result is as shown in FIG. 6B. , Later in FIG. 1 (b),
As shown in FIG. 8, the stopper holder 1 of the stopper gear 17
The side surface 16a of the stopper 16 of the pinion 15 hits the tip surface 18a of the pinion 8 to stop the rotation of the pinion 15, and the drum rotation shaft 7 cannot rotate any more. Therefore, when the storage is lifted (when stored in the storage box 2), it is possible to prevent the clothesline 9 from further exceeding the upper limit position and being caught by the opening edge of the ceiling, the decorative cover, or the like.
Spur gear train 13 is no longer overloaded and spur gear train 1
The durability of No. 3 can be improved. In addition, the side surface 16a of the stopper 16 has a tip surface 18 of the stopper receiver 18.
Since a is applied to the pinion 15, the rotational force of the stopper 16 shown by the arrow a (a ′) in FIG. 1 can be reliably received by the entire stopper receiver 18 as shown by the arrow b (b ′). Can be reliably stopped, the load transmitted to the spur gear train 13 can be reliably received by the stopper gear 17, and the durability of the spur gear train 13 is further improved.

In the above embodiment, the drum rotating shaft 7
The pinion 15 is attached to the shaft of the spur gear 12b in the subsequent stage directly connected to
Although the case where the pinion 15 is mounted is described, the mounting position of the pinion 15 is not limited to the spur gear 12b of the rear stage, and any one spur gear of the spur gear train 13 for reduction (the intermediate spur gear 12c or the front spur gear 12a). May be

FIG. 9 shows a structure in which the output shaft of the motor 4 and the rotary shaft of the rotary drum 3 are connected to each other through a spur gear train 13 which constitutes a reduction mechanism, and the spur gear train 13 is used only when the clothesline 9 is lowered. The case where resistance force urging means 21 for transmitting resistance torque to the spur gear 12a which constitutes it is provided is shown. The other structure is similar to that of the embodiment of FIG.

In this example, the resistance urging means 21 includes a leaf spring 22 fixed to the gear case 19 side, a sliding member 23 sliding on the leaf spring 22, and a shaft portion 24 of the sliding member 23. It is fitted between the spur gear 12a and the gear hole 25, and idles when the clothesline 9 rises, and when the clothesline 9 descends, the resistance torque between the leaf spring 22 and the sliding member 23 is reduced by the spur gear 12a.
And a one-way clutch 26 for transmitting the

Here, the spur gear train 1 which constitutes the reduction gear mechanism
Of the three, the one-way clutch 26 is provided on the spur gear 12a at the front stage. The one-way clutch 26 is composed of a roller that transmits the resistance torque between the leaf spring 22 and the flange portion 28 of the sliding member 23 shown in FIG. 9 in only one direction, and automatically idles in the opposite direction. There is. This roller type one-way clutch 26 idles with respect to the spur gear 12a when the spur gear 12a rotates in the direction of arrow a in FIG. The spur gear 12a is configured to rotate together with the sliding member 23 when the gear 12a rotates in the direction of arrow b, for example. Both ends of the arc-shaped leaf spring 22 are supported on the gear case 19 side, and the sliding member 23 is provided on the top of the leaf spring 22.
The flange portion 28 is pressed, and the spring force of the leaf spring 22 is applied in the axial direction of the sliding member 23 to generate a frictional force. A support hole 29 is formed at the center of the leaf spring 22, and the tip of the shaft portion 24 of the sliding member 23 is rotatably supported by the support hole 29.

However, even when the load of laundry or the like when the clothesline 9 is stationary exceeds the resistance torque of the motor 4 (FIG. 8) and the resistance torque of the spur gear train 13, the leaf spring 22 and the sliding member. Since the resistance torque generated between the clothes rack 23 and 23 is transmitted to the spur gear 12a via the one-way clutch 26, the position of the clothesline 9 can be reliably held. Therefore, with the passage of time, the weight of the clothesline 9 causes the spur gear train 13 to move.
There is no need to worry that the clothespin will rotate and the clothesline 9 will come down.

Further, when the clothesline 9 descends, the sliding member 23 and the spur gear 12 are operated by the action of the one-way clutch 26.
The resistance torque generated between the leaf spring 22 and the sliding member 23 is transmitted to the spur gear 12a by co-rotating with a. That is,
The resistance torque is determined by the flange portion 28 of the sliding member 23 and the leaf spring 2.
2 and the resistance torque is applied to the spur gear train 13 via the one-way clutch 26, the electric power generation effect by the potential energy of the load on the motor 4 does not occur when the clothesline 9 descends. Therefore, since it is possible to prevent the voltage drop due to the back electromotive force, it is possible to secure a voltage for burning the carbon (soot) generated in the brush inside the motor 4, and it is possible to prevent a current short circuit or the like from occurring in the brush portion, Thereby, the reliability and durability of the motor 4 can be improved.

On the other hand, when the clothesline 9 is raised, the spur gear 12a is freed from the sliding member 23 by the one-way clutch 26, so that the resistance torque applied to the spur gear train 13 is small and the spur gear train 13 has an excessive torque. The load can be prevented.

Further, in this example, since the resistance torque is generated by the leaf spring 22, there is little variation in the spring constant of the leaf spring 22, and therefore the resistance torque can be easily managed. Note that the sliding portion between the leaf spring 22 and the sliding member 23 may be filled with grease or the like. In this case, the quietness can be secured by eliminating the frictional noise between the leaf spring 22 and the sliding member 23. The type of grease is not particularly limited,
A wide range can be selected. Moreover, since the resistance force urging means 21 can be simply configured by the leaf spring 22, the sliding member 23, and the roller type one-way clutch 26, the cost and size of the apparatus can be reduced as compared with the case of using the electromagnetic clutch. Can be achieved.

Further, the case where the one-way clutch 26, etc. constituting the resistance force urging means 21 is provided in the front spur gear 12a of the spur gear train 13 has been described, but it goes without saying that the intermediate spur gear 12c or the rear spur gear 12c. It may be provided on the spur gear 12b. It is also possible to provide the one-way clutch 26 and the like on the plurality of spur gears 12a to 12b.

10 to 13 show another embodiment of the resistance biasing means 21. In this example, the resistance force urging means 21 comprises a coil spring 30 having one end fixed at a predetermined position and the other end inserted into a shaft member 31 attached to the spur gear 12 a. The coil spring 30 is a clothesline 9.
When the clothes rod 9 descends, it rotates in the expanding direction X and idles with respect to the spur gear 12a, and when the clothesline 9 descends, it rotates in the narrowing direction Y and transmits a resistance torque to the spur gear 12a. In this example, the spur gear 12a
The coil spring 30 is fitted in the tip end portion of the shaft member 31 fitted in the gear hole portion 32. As shown in FIGS. 12 and 13, the outer peripheral shape of the shaft member 31 and the inner peripheral shape of the gear hole portion 32 are each cut into a D shape, and the shaft member 31 and the spur gear 12a rotate together. It is like this.
Further, as shown in FIG. 10, a cylindrical portion 33 having an outer diameter slightly smaller than the inner diameter of the coil spring 30 is provided at the other end of the shaft member 31, and the coil spring 3 is provided on the outer peripheral surface of the cylindrical portion 33.
The inner peripheral surface of 0 hits elastically. Here, the coil spring 30 is tightened in the direction Y in which the coil spring 30 is narrowed when the spur gear 12a rotates in the arrow direction a when the clothesline 9 descends, and the arrow direction of the spur gear 12a when the clothesline 9 rises. The coil spring 30 is designed to loosen in the direction X in which the coil spring 30 spreads when rotating b. In addition, the coil spring 30 is a spring case 3 fixed to the gear case 19a side.
4 (FIG. 11) and the coil spring 3
One end of 0 is bent at a substantially right angle on the circumference of the coil. By inserting this bent portion 35 into the hole provided in the spring case 34, the rotation of the coil spring 30 is restrained on the one end side of the coil spring 30. There is.

However, when the clothesline 9 is stationary, the load of laundry or the like depends on the resistance torque of the motor 4 and the spur gear train 1.
Even if the resistance torque exceeds 3, the coil spring 3
Since 0 rotates in the tightening direction and this resistance torque is transmitted to the spur gear 12a, the position of the clothesline 9 can be reliably held. Therefore, with the passage of time, there is no concern that the spur gear train 13 will rotate due to the weight of the clothesline 9 and the clothesline 9 will lower.

Further, since the coil spring 30 rotates in the narrowing direction Y when the clothesline 9 descends, the coil spring 30
A resistance torque due to friction is generated between the inner peripheral surface of the shaft member 31 and the outer peripheral surface of the shaft member 31, and is transmitted to the spur gear 12a. Therefore, FIG.
In the same manner as in the above embodiment, the motor 4 is used when the clothesline 9 is lowered.
The power generation effect due to the potential energy of the load does not occur, the voltage for burning the carbon (soot) generated by the brush inside the motor 4 can be secured, and it is possible to prevent current short circuit etc. at the brush part. As a result, the effect that the reliability and durability of the motor 4 can be improved can be obtained.

On the other hand, when the clothesline 9 is raised, the coil spring 30 rotates in the expanding direction X, so that the spur gear 12a is free from the coil spring 30, and the resistance torque applied to the spur gear train 13 is small, so It is possible to prevent overload.

Further, the coil spring 30 is provided with a resistance urging means 2
Since 1 is configured, the number of parts can be reduced, and the effect of facilitating assembly can be obtained, and the coil spring 3
Since the resistance torque is generated by using 0, there is little variation in the spring constant of the coil spring 30, and therefore, the effect of facilitating the management of the resistance torque is also obtained.

The coil spring 3 is attached to the front spur gear 12a.
Although 0 or the like is provided, of course, it may be provided on another intermediate spur gear 12c or a succeeding spur gear 12b. Further, the coil spring 30 and the like are provided on only one spur gear 12a, but it is also possible to provide the coil spring 30 and the like on a plurality of spur gears 12a to 12b.

[0032]

As described above, according to the first aspect of the present invention, a wire for suspending a clothesline is connected to a rotating drum rotated by a motor, and the rotating drum is rotated to wind or wind the wire. A lifting and lowering device for lifting and lowering a clothesline by returning it, wherein any one of spur gears forming a spur gear train by connecting a motor output shaft and a drum rotation shaft via a spur gear train for speed reduction A pinion with a stopper is provided on the shaft part of one spur gear, and a stopper gear is provided, and a stopper gear with a gear ratio different from that of the pinion is meshed with the pinion, and the stopper receives the stopper during normal lifting of the clothesline. When the clothesline does not hit the bottom of the clothesline at least below the lower limit position, the stopper hits the stopper receiver to prevent the clothesline from moving downward. Since the gear ratio of the above pinion and stopper gear is set so that even if the clothesline is at the lower limit position, the stopper will hit the stopper receiver and stop rotation of the pinion when pulled down by hand. The drum rotation shaft can no longer rotate, and there is no fear that the wire will be completely unwound from the rotation drum and entangled with the rotation drum, and there is no possibility of causing malfunction. Moreover, since the rotation of the drum rotation shaft is stopped by the stopper gear, the load applied to the spur gear train for deceleration interposed between the drum rotation shaft and the motor output shaft is reduced, and the strength of the spur gear train is guaranteed. it can. In addition, the structure that hangs the clothesline with a wire is adopted, so the entire device can be made compact compared to the conventional one in which the pantograph is folded and stored, and a pinion with a stopper is provided on any one spur gear of the spur gear train. The lower limit of the clothesline can be regulated by a simple structure in which a stopper gear with a stopper receiver having a different gear ratio is meshed with the pinion.

In addition to the effect of claim 1, the invention according to claim 2 further comprises a pinion so that when the clothes rod is lifted above the upper limit position of the clothesline, the stopper hits the stopper receiver to prevent the clothesline from moving upward. Since the gear ratio with the stopper gear is set, when the clothesline does not stop at the upper limit position of the normal operation, the rotation of the pinion is stopped by the stopper gear, and the drum rotation shaft cannot rotate any more. Therefore, it is possible to prevent the laundry pole from being overloaded beyond the upper limit position and being caught by the opening edge of the ceiling, the decorative cover, or the like, so that the spur gear train is not overloaded, and the durability of the spur gear train is improved. be able to.

[Brief description of drawings]

FIG. 1 shows an example of an embodiment of the present invention, in which (a) is a partially cutaway side view showing a state where a stopper hits a stopper receiver at a lower limit of a clothesline, and (b) is a stopper at an upper limit of a clothesline. FIG. 7 is a side view with a part cut away showing a state in which the stopper is hit.

FIG. 2 (a) is a partially omitted side view of the above-mentioned clothesline,
(B) is a plan view.

FIG. 3 is a plan view illustrating a spur gear train of the above.

FIG. 4 is a front view illustrating the above spur gear train.

FIG. 5A is an explanatory view of a state where the stopper hits the stopper receiver when the clothesline is further lowered from the lower limit position, and FIG. 5B is a view showing the stopper and the stopper receiver at the normal lower limit position of the clothesline. Illustration of the positional relationship,
(C)-(h) is explanatory drawing of the positional relationship of a stopper and a stopper receiver at the time of the normal raising / lowering operation of a clothesline.

FIG. 6 (a) is an explanatory view of a positional relationship between a stopper and a stopper receiver at a normal upper limit position of a clothesline,
(B) is an explanatory view of a positional relationship between the stopper and the stopper receiver when the stopper is further raised from the upper limit position.

FIG. 7A is an explanatory view of a state where the wire is wound around the rotating drum at the lower limit position of the clothesline; FIG.
FIG. 6 is an explanatory view of a state where the wire is unwound from the rotating drum.

FIG. 8 is a front view for explaining the spur gear train of the above.

FIG. 9 is an exploded perspective view illustrating an example of the above resistance force urging means.

FIG. 10 is an exploded perspective view for explaining another example of the above resistance force urging means.

FIG. 11 is a plan view of a drive unit including the above resistance force urging means.

12A and 12B are a side view and a rear view of the shaft member of the above.

13 (a) and 13 (b) are a front view and a sectional view of the above spur gear.

14 (a) and 14 (b) are explanatory views of a lifting operation of a conventional clothesline.

FIG. 15 is a front view of a conventional lifting and lowering apparatus.

[Explanation of symbols]

1 Lifting and drying equipment 3 rotating drums 4 motor 6 motor output shaft 7 Drum rotation axis 9 clothesline 11 wires 12 spur gears 13 Spur gear train 15 pinion 16 stopper 17 Stopper gear 18 Stopper holder

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiroo Fukui, 1048, Kadoma, Kadoma, Osaka Prefecture, Matsushita Electric Works, Ltd. (72) Kenji Adachi, 1048, Kadoma, Kadoma, Osaka, Matsushita Electric Works, Ltd. (72) Inventor Takasaku Inoue 1048, Kadoma, Kadoma City, Osaka Prefecture, Matsushita Electric Works, Ltd. (56) References JP-A-10-179991 (JP, A) JP-A-9-303436 (JP, A) Actual Kaihei 2- 96064 (JP, U) Actual Kaihei 2-1096 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) D06F 57/12

Claims (2)

(57) [Claims] 1. An elevating and lowering device for lifting and lowering a clothesline by connecting a wire for suspending a clothesline to a rotating drum that is rotated by a motor, and winding or rewinding the wire by rotating the rotating drum. Any one of spur gears forming a spur gear train by connecting a motor output shaft and a drum rotation shaft via a spur gear train for speed reduction
A pinion equipped with a stopper is provided on the shaft portion of the two spur gears, and a stopper gear that has a stopper receiver and a gear ratio different from that of the pinion meshes with the pinion.
When the clothesline is normally moved up and down, the stopper does not hit the stopper receiver, and when the clothesline descends at least from the lower limit position, the stopper hits the stopper receiver and prevents the clothesline from moving downward. An elevating and lowering device for drying clothes, which is configured by setting a gear ratio. 2. The gear ratio between the pinion and the stopper gear is set so that when the clothes rod moves above the upper limit position, the stopper hits the stopper receiver to prevent the clothes rod from moving upward. The lifting and lowering apparatus according to claim 1.