KR200290612Y1 - Washing drier - Google Patents

Abstract

The present invention provides a drying rod body mounted on the ceiling, a hook rod support on which a plurality of hook rods for hanging laundry are mounted, a plurality of connecting links for foldably connecting the drying rod body and the hook rod support, and the plurality of hooks. A driving unit provided in the drying stand body, wherein the hook rod support is provided in the laundry drying stand having a plurality of ropes for elevating the hook rod support with respect to the drying stand body by a connecting link; A rotating shaft rotatably coupled to the driving shaft of the driving unit; A winding roller provided in the drying base body to wind the plurality of ropes when the hook rod support is raised and to unwind the plurality of ropes when the hook rod support is lowered; The rope is characterized in that it comprises an operating state control unit for controlling a predetermined limit operating state of being wound and unwound in the winding roller. Thereby, the operation of the drive unit for raising and lowering the hanger rod support at the threshold point where the hanger rod support is fully raised and lowered completely can be automatically turned off (Off), and the drying time of the laundry by the hot air spray method is greatly increased. And it is possible to shorten the easy, it is provided with a laundry drying rack to easily adjust the length of the rope to easily match the horizontal state of the hanger rod.

Description

Laundry drier {Washing drier}

The present invention relates to a laundry drying rack, and more particularly, to allow the operation of the drive unit for lifting and lowering the hanger rod support at a threshold at which the hanger rod is fully raised and lowered completely. The present invention relates to a laundry drying rack that can shorten a drying time of a laundry drastically by a hot air spray method and to easily adjust the length of a rope to easily match a horizontal state of a hanger bar.

8 is a perspective view of a conventional laundry dryer disclosed in Korean Utility Model Registration No. 20-0220049. As shown in this figure, the conventional laundry drying rack 1 is provided with a fixing frame 4 having fastening holes 3 formed at both ends thereof so as to be mounted to the ceiling T by the fixing member 2. On both sides of the fixed frame 4, the X-shaped foldable link member 5 is installed vertically downward, and at the lower end of the link member 5, the hook bag is raised or lowered according to the folded state of the link member 5. Zones 6a and 6b are joined in a state facing each other.

A plurality of hook rods 8 are coupled to both ends of the hook rod supports 6a and 6b so as to hang the laundry 7, respectively, and artificially provide lifting force to the outer surfaces of the hook rod supports 6a and 6b. One end of the wire 9 is connected, and the other end of the wire 9 has a structure in which the handle 10 is fixed to simultaneously pull or release both wires 9 at the same time.

Accordingly, when the user selectively pulls or releases the handle, the X-shaped link member 5 is folded with the lifting force transmitted to the hook rod support 6a, 6b through the wire 9, and at the same time, the hook rod support 6a, 6b) and the laundry 7 can be moved up and down. Thus, by moving the laundry 7 upwards, the lower space becomes available, so that a narrow veranda space such as an apartment or a townhouse can be effectively used.

By the way, the use of the laundry drying rack as shown in FIG. 8 makes it easier to walk the laundry and improve the space utilization, but there is a difficulty in its operation because the height adjustment of the laundry hanger rod is made entirely by manpower.

In particular, if there is a lot of laundry hanging on the hanger bar, the handle should be pulled with considerable force so that housewives may not be able to adjust the height relatively much, and as the wire is stretched downward as the handle is pulled, the pedestrian may pass. When the wire is pulled and locked on one side of the laundry dryer after pulling the wire, the wire is frequently broken or the shape of the dryer is deformed or broken due to the excessive load of the laundry.

Since, to compensate for the above problems, the product has been released that can be easily performed by using the driving force of the motor without artificially performing the lifting operation of the drying rack by the electric design of the drying rack.

9 is a perspective view of another conventional laundry dryer disclosed in Korean Utility Model Registration No. 20-0268978. In this figure, a conventional laundry drying rack is wound around a winding drum 41 mounted on a drive shaft 42 of an electric motor 40 installed by a body 10 fixed to a ceiling T, and wound on a winding drum 41. Folding rod 20 hanging on a pair of rope 50 that is stretched in accordance with the forward and reverse rotation of the plurality of hook rods 30 mounted by the hook rod support 32 between the folding rod 20 And, on both sides of the body 10 is made up of a fixed pulley 60 and the blower fan 80 provided on the lower surface of the body 10 to be activated by the degree of tension of the rope 50 to operate the contact switch 70 have.

By the way, in the laundry drying rack of Figure 9, since the operation of the drive unit (the above-mentioned "motor motor") for lifting and lowering at the limit point that the hanger rod support is fully raised and the point that is completely lowered, including the hanger rod is not stopped. In addition to burnout and malfunction caused by unnecessary driving of the drive unit, power consumption is increased. In addition, the electric motor employed in FIG. 9 is generally employed as a motor driven by an AC power source, which is disadvantageous for long time use and poses a risk of overload.

In addition, although the drying time of the wet laundry can be shortened by the blowing fan, the drying time of the laundry is shorter than that of the hot air spray method. In addition, the conventional laundry dryer has a disadvantage that it is not easy to maintain the horizontal state of the hanger bar by adjusting the length of the pair of ropes to be the same.

Therefore, an object of the present invention, by the operation of the drive unit for raising and lowering the hanger rod support at the limit point that the hook rod support is fully raised and lowered completely automatically (Off), thereby causing damages due to unnecessary driving of the drive unit and It is to provide a laundry dryer that not only prevents malfunction but also reduces power consumption.

In addition, it is possible to significantly shorten the drying time of the laundry by the hot air spray method, to provide a laundry drying rack that can easily adjust the length of the rope to easily match the horizontal state of the hanger rod.

1 is a perspective view showing a state in which the laundry drying rack according to the present invention is mounted on the ceiling,

Figure 2 is a perspective view of the operating state of Figure 1,

3 is a front view of the drying main body,

Figure 4a is a view showing a state in which the switch operating piece of the operating state control unit provided in the drying main body moved in one direction,

Figure 4b is a view showing a laundry dryer operating in accordance with Figure 4a,

Figure 5a is a view showing a state in which the switch operating piece of the operating state control unit provided in the drying base body is moved in the opposite direction of Figure 4a,

Figure 5b is a view showing a laundry dryer operating in accordance with Figure 5a,

6 is a perspective view showing a state in which the laundry drying rack shown in FIG. 1 is installed on the ceiling in a state different from that of FIG. 2;

Figure 7a is a control block diagram between the control box and the hot air spray device,

7B to 7E are diagrams exemplarily illustrating an on / off cycle of a blower fan, respectively.

8 is a perspective view of a conventional laundry dryer,

9 is a perspective view of another conventional laundry dryer.

* Explanation of symbols for the main parts of the drawings

110: main body 120: connecting link

130: hanger rod 132: hanger rod support

140: drive unit 142: rotation axis

150: operation state control unit 160: hot air jet device

170: control box 180: input device

190: rope length adjusting member

The object is, according to the present invention, a drying rod body mounted on the ceiling, a hook rod support on which a plurality of hook rods for hanging laundry are mounted, and a plurality of connecting links for foldably connecting the drying rod body and the hook rod support to each other. And a laundry drying rack having a plurality of ropes for elevating and hanging the hook rod support with respect to the drying base body by the plurality of connecting links, comprising: a driving unit provided in the drying base body; A rotating shaft rotatably coupled to the driving shaft of the driving unit; A winding roller provided in the drying base body to wind the plurality of ropes when the hook rod support is raised and to unwind the plurality of ropes when the hook rod support is lowered; The rope is achieved by a laundry dryer characterized in that it comprises an operating state control unit for controlling a predetermined limit operating state that is wound and unwound in the winding roller.

Here, the operation state control unit, the ball screw is disposed coaxially with the rotary shaft and rotatable with the rotary shaft; A pair of limit switches disposed at both ends of the ball screw to turn on and off an operation of the driving unit according to the rising and falling of the hook rod support; And a switch operating piece coupled to the ball screw to reciprocate along the longitudinal direction of the ball screw and to selectively contact the pair of limit switches to operate the limit switch.

The drive unit has a forward and backward driveable DC drive motor, and a reducer coupled to the drive shaft of the DC drive motor to reduce the driving force of the DC drive motor.

Each of the winding rollers may be provided in the ball screw to move the main roller part along the axial direction of the ball screw, and auxiliary roller parts provided at both sides along the longitudinal direction of the drying stand body and installed to correspond to the plurality of connection links. Include.

At least one hot air jet port is formed through the plate surface of the drying main body toward the hanger rod, and a hot air jet device for spraying hot air toward the laundry hooked to the plurality of hook bars through the hot air jet port is provided in the drying main body. It is prepared.

The hot air spraying unit, the fan housing; A blowing fan rotatably provided in the fan housing; And a heater capable of generating heat in the fan housing facing the hook rod.

It may include a control box provided in the drying main body for controlling the drive unit and the hot air spraying device, and an input device for inputting a predetermined control signal to the control box.

The control box is provided with a microcomputer in which a predetermined program is embedded, and it is advantageous to set an on / off period of at least one of the blower fan and the heater by the microcomputer.

It is advantageous to further include a rope length adjusting member provided on at least one side of the drying stand body and the hanger rod support to adjust the rope length between the drying stand body and the hanger rod support.

The rope length adjusting member includes a main body portion having a rope through hole formed therein to allow the rope to pass therethrough; It is provided in the body portion and has a stopper that allows the rope to move in one direction while restricting movement in the opposite direction.

An infrared sterilizer may be further installed in the drying body.

Hereinafter, with reference to the accompanying drawings will be described in detail for the subject innovation.

1 is a perspective view showing a state in which the laundry dryer according to the present invention is mounted on the ceiling, Figure 2 is a perspective view of the operating state of FIG. As shown in these drawings, the laundry drying rack according to the present invention is a drying rod main body 110 mounted on the ceiling (T), and a hook rod support 132 on which a plurality of hook rods (130) for hanging laundry are mounted. The drying rod main body 110 and the hook rod support 132 by the plurality of connecting links 120 and the plurality of connecting links 120 to be foldable to each other, the drying stand main body 110 and the hook rod support 132. It has a plurality of ropes (135a, 135b) for lifting relative to.

Drying main body 110 is made of a rectangular cylinder shape, is mounted to be exposed to the ceiling (T). The main body 111 is the drying unit 110 is provided with a drive unit 140, a rotating shaft 142, a winding roller (not shown), the operation state control unit 150 and the hot air spray unit 160 to be described later in detail. ) And a cover case 112 covering the opening of the main case 111.

An opening edge surface of the main case 111 is formed with a flange portion 111a for coupling with the cover case 112 along its circumferential direction. On the plate surface of the cover case 112, a plurality of hot air jet holes 112a through which hot air generated from the hot air jet device 160 to be described later is sprayed are formed. On both sides of the hot air injection port 112a, a pair of link entry and exit portions 112b through which the connection link 120 enters and exits are formed.

In this embodiment, there are two hot air jetting ports 112a, and two hot air jetting devices 160, which will be described later, are also two. However, this is only one embodiment, and the number of hot air jet holes 112a and hot air jet devices 160 may be properly adjusted in consideration of the size of the laundry dryer.

1 and 2, the drying main body 110 is installed to be exposed to the ceiling (T). However, as shown in Figure 6, the drying main body 110 may be mounted embedded in the ceiling (T). Here, even in the case of Figure 6, the configuration is the same as Figures 1 to 5 bar 6 will not be described separately. In addition, the drying main body 110 shown in Figs. 1 and 6 has a rectangular cylinder shape, but if you want to improve the appearance of the appearance may take a circular or other polygonal shape.

Hanging rod support 132 (see Fig. 4b) is made of a pair to be spaced apart from each other along the longitudinal direction of the drying base body (110). The plate surface of the hook rod support 132 is formed with a hook hole (132a) for mounting a plurality of hook rods for hanging laundry. In addition, a long hole 132b is formed around the locking hole 132a to hold the lowermost end of the connection link 120 in a flowable manner.

A plurality of connecting links 120 are mounted between the drying stand body 110 and the hook rod support 132. Each of the connecting links 120 are folded or unfolded so that the hook rod support 132 can be moved to a lowered position spaced apart from the lifted main body 110 and the lowered position that is approached to the dry main body 110. Of course, the lifting movement of the hook rod support 132 is made by the winding (135a, 135b) of the rope (135a, 135b) to the main roller portion 144 (see FIG. 3) by the drive of the drive unit 140.

As shown in FIG. 3, the driving unit 140 includes a DC driving motor 140a and a speed reducer 140b coupled to the driving shaft of the DC driving motor 140a to reduce the driving force of the DC driving motor 140a. do. In this case, the DC drive motor 140a may be used as a stepping motor capable of controlling the stop angle as well as forward and reverse rotation. By employing the DC drive motor 140a as described above, not only is it advantageous for long time use, but the risk of overload can be eliminated, and a high output can be obtained with a small force. The drive shaft of the reducer 140b is provided with a rotating shaft 142 which is disposed along the transverse direction in the longitudinal direction of the drying base body 110 and rotates.

When the hook rod support 132 is raised in the drying unit body 110, the plurality of ropes 135a and 135b are wound up, and when the hook rod support 132 is lowered, the ropes 135a and 135b are wound up. A winding roller for releasing is provided. Here, the winding roller includes the main roller part 144 and the auxiliary roller part 145 below, and the reference numerals for the winding roller are omitted for convenience.

The winding roller is provided in the ball screw 151 which will be described later, and is provided on both sides along the longitudinal direction of the main roller part 144 and the drying stand main body 110 that is movable along the axial direction of the ball screw 151. The auxiliary roller unit 145 is installed to correspond to the 120. Accordingly, the pair of ropes 135a and 135b fixed to both ends of the hook rod support 132 are connected to the pair of auxiliary roller parts 145 in the drying stand body 110 along the pair of link links 120. After being supported, it may be wound around the main roller unit 144.

Thus, when the DC drive motor 140a is operated so that the ends of the ropes 135a and 135b are wound on the main roller part 144, the hook rod support 132 including the hook rod 130 is raised, and the rope 135a. When the end of the 135b is unwinded to the main roller unit 144, the hook rod support 132 may be lowered.

On the other hand, when the hook rod support 132 is raised while the ropes 135a and 135b are wound on the main roller part 144 by the operation of the DC driving motor 140a, the hook rod support 132 is completely raised. And the direct drive motor 140a should not continue to operate.

That is, after the hook rod support 132 is fully raised, the operation of the DC drive motor 140a should be stopped, and on the contrary, the operation of the DC drive motor 140a should be stopped even after the hook rod support 132 is completely lowered. In addition to suppressing burnout and malfunction due to unnecessary driving of the DC driving motor 140a, power consumption may be reduced.

To this end, the present invention provides an operating state control unit 150 for controlling a predetermined limit operating state in which the ropes 135a and 135b are wound and unwound in the main roller unit 144. The operation state controller 150 is disposed coaxially with the rotation shaft 142 and is rotatable with the rotation shaft 142, and is disposed at both ends of the ball screw 151 so that the hook rod support 132 may be provided. A pair of limit switches 152a and 152b for turning on and off the operation of the driving unit 140 in accordance with the rising and falling, and the ball screw 151 is coupled to the reciprocating movement along the longitudinal direction of the ball screw 151 And a switch operating piece 144 selectively contacting the pair of limit switches 152a and 152b to operate the limit switches 152a and 152b. In this embodiment, the switch operation piece 144 becomes the above-mentioned main roller part 144, and the same reference numerals are given to the switch operation piece and the main roller part.

Thus, as shown in Figure 4a, when the DC drive motor 140a operates in one direction, the switch operation piece 144 is directed to the first limit switch 152a. At this time, the ropes 135a and 135b are unwound from the switch operating piece 144 and the hook rod support 132 including the hook rod 130 starts to descend. 4B, when the hook rod support 132 is completely lowered, the switch operating piece 144 moving along the ball screw 151 is in contact with the first limit switch 152a. The DC drive motor 140a is turned off by operating the limit switch 152a. At this time, the bar may be a use position of the drying bar, and the user may hang wet laundry on the hanger rod 130 lowered from the ceiling T.

On the contrary, as shown in FIG. 5A, when the DC driving motor 140a operates in the opposite direction as described above, the switch operation piece 144 that is in contact with the first limit switch 152a is moved to the second limit switch 152b. Headed. At this time, the ropes 135a and 135b are wound from the switch operating piece 144 and the hook rod support 132 including the hook rod 130 starts to rise. 5B, when the hook rod support 132 is fully raised, the switch operating piece 144 moving along the ball screw 151 contacts the second limit switch 152b when the hook rod support 132 is fully raised. By operating the limit switch 152b, the DC drive motor 140a is also turned off. In this case, the drying of the laundry is completed, it can be said that the laundry dryer does not use.

As such, the laundry can be naturally dried by adjusting the height of the hook rod 130. However, in the present invention, a separate hot air spray device 160 is further provided to dry the wet laundry faster. Of course, the hot air spraying device 160 described below is used to dry the laundry quickly depending on the selection, and is not used otherwise.

The hot air spraying device 160 provided in the drying main body 110 and spraying hot air toward the laundry hooked to the hanger 130 is a fan housing 160a and a blowing fan 160b rotatably provided in the fan housing 160a. And a heater 160c provided in the fan housing 160a facing the hook rod 130 to generate heat. Thus, when the blowing fan 160b rotates while the heater 160c is in operation, the heat formed by the heater 160c may be transferred to the laundry by the blowing fan 160b. Therefore, the drying time of laundry can be shortened much.

On the other hand, the drying main body 110 is provided with a control box 170 for controlling the drive unit 140 and the hot air spraying device (160). The control box 170 is controlled by an input device 180 for inputting a predetermined control signal. In this case, the input device 180 may be integrated with the control box 170 in the drying main body 110 and may be employed as a remote controller for transmitting a wireless signal to the control box 170.

The input device 180 includes an on / off button 180a for supplying and cutting off power to the driving unit 140, a speed control button 180b for controlling the speed of the DC driving motor 140a, and a hot air spraying device 160. Injector operation button (180c) for operating the) may be provided.

On one side of the drying main body 110, a rope length adjusting member 190 (see FIG. 1) for adjusting the length of the ropes 135a and 135b between the drying main body 110 and the hook rod support 132 is mounted. The rope length adjusting member 190 is provided with a main body portion (not shown) having a rope through hole formed therein to allow the ropes 135a and 135b to pass therethrough, and is provided in the main body portion and allows the ropes 135a and 135b to move in one direction. While moving in the opposite direction includes a limiting stopper (not shown).

Due to the rope length adjustment unit 190, for example, when the length of the pair of ropes (135a, 135b) shown in Figure 2 are different from each other and the hook rod 130 is not maintained in a horizontal state, the rope ( 135a, 135b) may be appropriately adjusted.

Referring to the operation of the laundry dryer having such a configuration as follows.

First, as shown in FIG. 5B, the hook rod 130 and the hook rod support 132 are lowered to hang the laundry on the hook rod 130 in a state in which the hook rod 130 and the hook rod support 132 are raised. Explain about making things happen.

The on / off button 180a of the input device 180 is operated to transmit a predetermined input signal to the control box 170 to apply power to the driving unit 140. When the DC drive motor 140a operates in one direction by the input signal, the switch operation piece 144 is directed to the first limit switch 152a. At this time, the ropes 135a and 135b are unwound from the switch operating piece 144 and the hook rod support 132 including the hook rod 130 starts to descend.

4b, when the hook rod support 132 is completely lowered, the switch operating piece 144 that has been moved along the ball screw 151 is first limited as shown in FIG. 4a. By operating the first limit switch 152a in contact with 152a, the DC driving motor 140a that is turned on by the input device 180 is turned off.

When the DC drive motor 140a is off (Off) and the hanger rod 130 is completed as described above, the user hangs the wet laundry on the hanger rod 130. Then, the injection device operation button 180c provided in the input device 180 is operated. When the blower fan 160b is rotated while the heater 160c is heated by the operation of the injector operation button 180c, the hot heat formed by the heater 160c is hooked to the hook rod 130 through the blower fan 160b. ), So that the laundry can dry quickly.

If you want to dry the laundry a little earlier, by operating the on-off button 180a of the input device 180 to apply power to the drive unit 140 by the operation of the DC drive motor 140a hanger rod 130 Hanger rod support 132 including a) to rise closer to the drying unit body 110 side. When it is raised to some extent, the on-off button 180a of the input device 180 is operated again to cut off the power to the driving unit 140, and then to fix the position of the hook rod support 132 including the hook rod 130. The hot air spraying device 160 may be operated in a state.

When the drying of the wet laundry is completed, the operation of the spray device operation button 180c provided in the input device 180 is stopped to stop the operation of the hot air spray device 160. Then, the DC driving motor 140a is operated in the opposite direction by the input device 180 so that the switch operating piece 144 is directed to the second limit switch 152b. As shown in FIG. 5B, when the hook rod support 132 that has been lifted by the DC driving motor 140a is completely raised, the switch operating piece 144 is as shown in FIG. 5A, and the second limit switch 152b. The DC drive motor 140a is turned off by operating the second limit switch 152b in contact with.

As such, according to the present invention, the operation of the driving unit 140 is stopped by the operation of the driving unit 140 for raising and lowering the hook rod support 132 at the limit point at which the hook rod support 132 is fully raised and the limit point at which the hook rod is completely lowered. In addition to suppressing burnout and malfunction due to unnecessary driving, power consumption can be reduced.

In addition, the drying time of the laundry can be significantly shortened by the hot air spraying device 160, and the length of the ropes 135a and 135b can be easily adjusted by the rope length adjusting member 190, thereby horizontally You can effectively match your status.

In addition to the above-described embodiment, if an infrared sterilizer is further provided in the drying main body 110, a sterilizing effect of preventing mold and bacterial propagation along with rapid drying of laundry may be obtained.

In the above-described embodiment has been described that the control box 170 controls the hot air jet device (160). However, the operation of the hot air jetting device 160 by the input device 180 may be performed in the following manner.

As shown in FIG. 7A, a microcomputer 171 is provided in the control box 170, and a fan driver 160d for driving the blower fan 160b is provided in the hot air spraying device 160. Then, the fan driving unit 160d is controlled by the microcomputer 171 to dry the laundry more effectively.

For example, the program of the microcomputer 171 is performed as shown in FIG. 7B. Then, after the blowing fan 160b is operated for 10 minutes by the fan driver 160d by the microcomputer 171, the process of stopping for 5 minutes is repeated. Therefore, the laundry hooked to the hook rod 130 can be easily dried.

In this case, the program of the microcomputer 171 may be performed as shown in FIG. 7C. That is, after the blowing fan 160b is operated by the microcomputer 171 for 30 minutes, the process of stopping for 10 minutes may be repeated. Alternatively, as shown in FIG. 7D, the blowing fan 160b is operated and stopped for 30 minutes by the microcomputer 171, or as shown in FIG. 7E, the blowing fan 160b is controlled by the microcomputer 171. Various types of control are possible, such as running for 60 minutes and stopping.

As such, by setting the on / off cycle of the blowing fan 160b of the hot air injector 160 by the program embedded in the microcomputer 171, the laundry can be dried more effectively.

In the above-described embodiment, the setting of the on / off cycle of the blowing fan 160b by the microcomputer 171 has been described. However, the heater 160c may also be set on / off period by the microcomputer 171.

As described above, according to the present invention, the operation of the drive unit for raising and lowering the hanger rod support at the limit point of the hanger rod support is fully raised and lowered automatically lowered (Off), according to unnecessary driving of the drive unit There is provided a laundry drying rack which can suppress burnout and malfunction, as well as reduce power consumption.

In addition, according to the laundry drying rack of the present invention, it is possible to significantly shorten the drying time of the laundry by the hot air spray method, it is possible to easily adjust the length of the rope to easily match the horizontal state of the hanger rod.

Claims (11)

A drying rod main body mounted on the ceiling, a hanging rod support on which a plurality of hanging rods for hanging laundry are mounted, a plurality of connecting links for foldably connecting the drying main body and the hanging rod support, and the plurality of connecting links. In the laundry drying rack having a plurality of ropes for lifting the hook rod support relative to the drying stand body, A driving unit provided in the drying stand body; A rotating shaft rotatably coupled to the driving shaft of the driving unit; A winding roller provided in the drying base body to wind the plurality of ropes when the hook rod support is raised and to unwind the plurality of ropes when the hook rod support is lowered; And an operating state control unit for controlling a predetermined limit operating state in which the rope is wound up and unwound in the winding roller. The method of claim 1, The operation state control unit, A ball screw disposed coaxially with the rotation shaft and rotatable with the rotation shaft; A pair of limit switches disposed at both ends of the ball screw to turn on and off an operation of the driving unit according to the rising and falling of the hook rod support; And a switch operating piece coupled to the ball screw and reciprocating along the longitudinal direction of the ball screw and selectively contacting the pair of limit switches to operate the limit switch. The method of claim 1, The driving unit includes a direct current drive motor capable of driving forward and backward, and a reducer coupled to the drive shaft of the DC drive motor to reduce the driving force of the DC drive motor. The method of claim 2, Each of the winding rollers may be provided in the ball screw to move the main roller part along the axial direction of the ball screw, and auxiliary roller parts provided at both sides along the longitudinal direction of the drying stand body and installed to correspond to the plurality of connection links. Laundry drying rack characterized in that it comprises. The method of claim 1, At least one hot air jet port is formed through the plate surface of the drying main body toward the hanger rod, and a hot air jet device for spraying hot air toward the laundry hooked to the plurality of hook bars through the hot air jet port is provided in the drying main body. Laundry drying rack, characterized in that provided. The method of claim 5, The hot air spraying device, Fan housing; A blowing fan rotatably provided in the fan housing; And a heater capable of generating heat in the fan housing facing the hook rod. The method according to any one of claims 1 to 6, And a control box provided on the drying unit main body to control the driving unit and the hot air spraying unit, and an input device for inputting a predetermined control signal to the control box. The method of claim 7, wherein The control box is provided with a microcomputer built-in a predetermined program, laundry drying rack, characterized in that the on / off period of at least one of the blowing fan and the heater is set by the microcomputer. The method of claim 1, And a rope length adjusting member provided on at least one side of the drying stand body and the hanger rod support to adjust a rope length between the drying stand body and the hanger rod support. The method of claim 9, The rope length adjustment member, A main body portion having a rope through hole formed therein to allow the rope to pass therethrough; And a stopper provided in the main body, the stopper permitting the rope to move in one direction and restricting the movement in the opposite direction. The method of claim 1, Laundry drying rack further comprises an infrared sterilizer provided in the drying main body.