JP2003185339A - Wet umbrella drying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten a wet umbrella drying time. <P>SOLUTION: This wet umbrella drying device comprises an umbrella drying vacuum tank 10 in which an umbrella is put, a heater 35 for heating the inside of the umbrella drying vacuum tank 10, a vacuum buffer tank 15, a vacuum pump 31 for depressurizing the vacuum buffer tank 15, a communication cutoff valve 33 for communicating the umbrella drying vacuum tank 10 and the vacuum buffer tank 15, and cutting off the communication, and a control circuit 20 for controlling the operation of the pump and the valve. The control circuit 20 opens the communication cutoff valve 33, and switches the heater 35 from preheating to main heating, when the umbrella 1 is put in the umbrella drying vacuum tank 10 and a lid 12 of the umbrella drying vacuum tank 10 is closed. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wet umbrella dewatering device for dewatering an umbrella that has been wet by rain or the like.

[0002]

2. Description of the Related Art As a conventional dehydrator, for example, there is one described in JP-A-11-241882.

This dehydrating apparatus includes an umbrella dehydration vacuum tank in which an umbrella is placed, and a vacuum pump which vacuum-sucks the inside of the umbrella dehydration vacuum tank.
Is equipped with.

[0004]

However, in the prior art, the lid of the umbrella dehydration vacuum tank is opened, and after the umbrella is put in this, the vacuum pump is driven to perform vacuum suction inside the umbrella dehydration vacuum tank. Therefore, it takes time to reduce the pressure in the umbrella dehydration vacuum tank, and as a result, there is a problem that the time for dehydrating a wet umbrella becomes long.

The present invention has been made in view of the above problems of the prior art, and an object thereof is to provide a wet umbrella dewatering device capable of dewatering a wet umbrella in a short time.

[0006]

SUMMARY OF THE INVENTION To achieve the above object, a wet umbrella dewatering device includes one or more umbrella dewatering vacuum tanks in which an umbrella is placed and one or more umbrella dewatering vacuum tanks, respectively. A vacuum buffer tank, a vacuum pump for vacuuming the inside of the vacuum buffer tank, and one or more of the umbrella dehydration vacuum tank and the vacuum buffer tank, which are provided in a communicating portion, and the communicating portion is placed in a blocking state and a communicating state. And a communication cut-off means.

[0007] Here, it is preferable that the dewatering device includes a heating means for heating the inside of the umbrella dewatering vacuum tank.

In the above dehydrating apparatus, the umbrella dehydration vacuum tank is a vacuum tank main body having an opening serving as an entrance of the umbrella and a storage chamber for accommodating the umbrella, and a lid for closing the opening of the vacuum tank main body. And a lid detection unit that detects opening and closing of the lid of the umbrella dehydration vacuum tank, an umbrella detection unit that detects that an umbrella is stored in the umbrella dehydration vacuum tank, and the lid detection unit. And a control unit which, when the closed state of the lid is detected and the storage of the umbrella is detected by the umbrella detection unit, causes the communication cutoff unit to change the communication portion from the cutoff state to the communication state. preferable.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Various embodiments of a wet umbrella dehydrator according to the present invention will be described below with reference to the drawings.

First, a first embodiment of a wet umbrella dehydrator according to the present invention will be described with reference to FIGS.

As shown in FIG. 1, an apparatus for dehydrating a wet umbrella according to the present embodiment includes an umbrella dehydration vacuum tank 10 in which the umbrella 1 is placed and a vacuum buffer tank 15 communicating with the umbrella dehydration vacuum tank 10.
And a vacuum pump 3 for vacuuming the inside of the vacuum buffer tank 15.
1, a drive motor 32 of the vacuum pump 31, a communication cutoff valve 33 provided in a communicating portion between the umbrella dehydration vacuum tank 10 and the vacuum buffer tank 15, and an atmosphere release valve provided in the umbrella dehydration vacuum tank 10. 34, a heater 35 for heating the inside of the umbrella dehydration vacuum tank 10, a monitor 25 for displaying various information, a control circuit 20 for controlling the drive motor 32, each solenoid valve 33, 34, the monitor 25, and the like, and a control circuit 20. A drive circuit 30 for driving the drive motor 32 and the solenoid valves 33, 34, etc. in accordance with a signal from the outer container 16, an outer container 16 for covering them, and a vibration isolation leg 19 for supporting the outer container 16.

The umbrella dewatering vacuum tank 10 includes a vacuum tank main body 11 in which an opening serving as an inlet of the squeezed umbrella 1 and a storage chamber for accommodating the umbrella 1 are formed, and a lid 12 for closing the opening of the vacuum tank main body 11. ,have. The lid 12 is attached to the vacuum chamber body 11 by a hinge 13 so as to be openable and closable. Vacuum tank body 1
A lid sensor 36 for detecting the opening and closing of the lid 12 is provided at the portion of the first portion, where the swinging end of the lid 12 faces. An umbrella sensor 37 that receives the umbrella 1 and detects that the umbrella 1 is housed is provided near the bottom of the vacuum chamber body 11. The communication shutoff valve 33 described above is provided at the bottom of the vacuum chamber body 11, and the atmosphere release valve 34 described above is provided at the top of the vacuum chamber body 11. Of the two ports of the atmosphere release valve 34, one port faces the inside of the vacuum chamber body 11, and the other port faces the outside of the apparatus. A filter is provided at the other port of the atmosphere release valve 34 facing the outside of the device to prevent dust and the like from entering the device.

The umbrella dewatering vacuum tank 10 described above is provided in a vacuum buffer tank 15. This vacuum buffer tank 15
Has a capacity of about 4 times the capacity of the umbrella vacuum dehydration tank 10, in other words, a vacuum buffer capacity of about 3 times the capacity of the umbrella vacuum dehydration tank 10. On the outer peripheral wall of the vacuum buffer tank 15,
A vacuum pump 31 and its drive motor 32 are attached. The suction port 31a of the vacuum pump 31 faces the inside of the vacuum buffer tank 15, and the exhaust port 31b of the vacuum pump 31 is outside the vacuum buffer tank 15 and is an outer container 16 described later.
Facing the inside. In addition, a pressure sensor 38 for measuring the internal pressure is provided in the vacuum buffer tank 15.

The vacuum buffer tank 15, the vacuum pump 31, and the drive motor 32 are housed in the outer container 16 as described above. Inside the outer container 16, the vacuum buffer tank 1
On the outer side of 5, the control circuit 20 and the drive circuit 30 are further provided.
Are arranged. A drain receiving tray 17 is attached to the bottom of the outer container 16, and the tray 17 is provided with a drain sensor 39 for measuring the drain amount and a drain drain valve 18.

As shown in FIG. 2, the control circuit 20 includes a CPU 21 for performing various calculations and a memory 22 in which programs executed by the CPU 21 and various data are stored.
And a timer 23 for measuring time, and an interface circuit 24 for receiving and transmitting signals between the monitor 25 and the drive circuit 30. The monitor 25 includes a dehydration-indicating light 26 indicating that dehydration is in progress and an end-indicating light 27 indicating that dehydration is completed.
And a drain drain indicator light 28 for prompting drain drain and a power switch 29. The drive circuit 30 has a drive motor 32, drive circuits for the solenoid valves 33, 34, and the heater 35, as well as an interface circuit (not shown) that receives signals from the sensors 36 to 39.

As the heater 35, as shown in FIG.
A plurality of rod-shaped far infrared heaters 35a, 35a, ... Are used. These plural bar-shaped far-infrared heaters 35a, 35a,
Are attached to the ring-shaped heater support plate 35b. The heater support plate 35b not only supports the rod-shaped far-infrared heaters 35a, 35a, ..., But also plays a role of preventing an umbrella that enters the through hole of the heater support plate from coming into contact with the heater.

Next, the operation of the dehydrator of this embodiment will be described with reference to the time chart shown in FIG.

The device administrator operates the power switch 2 of the monitor 25.
When 9 is operated to activate the dehydrator, the CPU 21 of the control circuit 20 reads the operation program stored in the memory 22 and executes the operation program. The CPU 21 drives the drive motor 32 via the interface circuit 24 and the drive circuit 30 to activate the vacuum pump 31, and also activates the heater 35 via the interface circuit 24 and the drive circuit 30 to preheat the state. To Further, when the dehydrator is activated, the communication shutoff valve 33 is closed, and the vacuum buffer tank 15 and the umbrella dehydration vacuum tank 10 are not in communication. Further, the atmosphere release valve 34 is open, and the umbrella dehydration vacuum tank 10 is at atmospheric pressure.

The vacuum pump 31 is controlled by the control circuit 20 so that the pressure in the vacuum buffer tank 15 measured by the pressure sensor 38 is maintained at the target pressure. Therefore, when the pressure in the vacuum buffer tank 15 reaches the target pressure, the vacuum pump 31 is temporarily stopped. Here, the target pressure in the vacuum buffer tank 15 is 1.71 × 10 ³ Pa (= 12.8 mmHg), which is the saturated vapor pressure at 15 ° C.
Is set to. Therefore, the pressure in the vacuum buffer tank 15 is basically the target pressure of 1.71 × 10.
Maintained at ³ Pa.

First, the owner of the wet umbrella must first remove the lid 1 of the dehydrator.
After opening 2 and putting the umbrella 1 in the umbrella dehydration vacuum tank 10, the lid 12 is closed. When the control device 20 recognizes that the umbrella 1 is housed by the signal from the umbrella sensor 37 and that the lid 12 is closed by the signal from the lid sensor 36, the control device 2
As shown in FIG. 4, the timer 23 in 0 starts the time measurement, and as shown in FIG. 4, the during-dewatering indicator light 26 of the monitor 25 is turned on, the atmosphere release valve 34 is opened, and the heater 35 is brought into the main heating state. After that, the communication cutoff valve 33 is opened. It should be noted that the main heating state has a larger amount of heat generation than the preheating state, and the heating amount per unit time will be described later.

As a result, as shown in FIG. 5, when the atmosphere release valve 34 is closed and the communication cutoff valve 33 is opened, the pressure of the umbrella dehydration vacuum tank 10 which was the atmospheric pressure Patm sharply decreases, while the target The pressure of the vacuum buffer tank 15 which was the pressure Pt rapidly rises, and the pressures of the umbrella dehydration vacuum tank 10 and the vacuum buffer tank 15 become P1 between the atmospheric pressure Patm and the target pressure Pt.
The vacuum pump 31 is, as described above, the vacuum buffer tank 1
Since the pressure in 5 is driven to maintain the target pressure Pt, the pressure in the umbrella dehydration vacuum tank 10 and the vacuum buffer tank 15 is
The target pressure Pt gradually increases.

Here, if the temperature of the rainwater attached to the umbrella 1 is 20 ° C., the pressure in the umbrella dehydration vacuum tank 10 is the saturation pressure when it is 15 ° C. Rainwater that evaporates evaporates. In the present embodiment, the wet umbrella 1 is placed under reduced pressure in this way to evaporate rainwater and remove water from the umbrella 1.

By the way, the heat of vaporization is removed in the process of evaporation of the rainwater attached to the umbrella 1, so that the temperature of the rainwater still remaining decreases. When the temperature of water decreases, not only the saturated vapor pressure also decreases and the evaporation amount of rainwater decreases, but in an extreme case, the water freezes and there is a possibility that rainwater cannot be removed at all. Further, when the temperature of the rainwater attached to the umbrella 1 is lower than 15 ° C., even temporary evaporation does not occur, and the rainwater may not be removed at all.

Therefore, in this embodiment, the umbrella dehydration vacuum tank 1 is used.
The inside of 0 is heated by the heater 35 to accelerate the evaporation of rainwater. The heating amount per unit time at the time of main heating by the heater 35 is larger than the heat of vaporization per unit time of the maximum rainwater that can adhere to the umbrella 1. Therefore, even if the evaporation of rainwater progresses and the heat of vaporization is removed, the temperature of the rainwater that still remains rises, and the evaporation efficiency of rainwater increases over time.

The evaporated rainwater remains in a gas state, and the communication shutoff valve 33, the vacuum buffer tank 15, and the vacuum pump 3 which are in an open state.
1, the gas is exhausted from the exhaust port 31b of the vacuum pump 31 into the outer container 16 outside the vacuum buffer tank 15. Since the inside of the outer container 16 is at atmospheric pressure, the rainwater in a gas state is condensed and becomes rainwater again, and is collected in the drain receiving tray 17 provided at the bottom of the outer container 16. When the amount of rainwater collected in the drain receiving tray 17 exceeds a certain amount,
The drain sensor 39 detects this and outputs a signal to that effect to the control circuit 20. When the control circuit 20 recognizes from the signal from the drain sensor 39 that the drain receiving tray 17 has accumulated a certain amount of rainwater or more, the control circuit 20 turns on the drainage indicator light 28 of the monitor 25 to drain the drainage of the drain to the system administrator. Urge.

The timer 23 measures the time from when the closing of the lid 12 is detected until a predetermined time T is reached. This time T is a time during which most of the extremely low temperature rainwater can be evaporated even if a large amount of it adheres to the umbrella 1. C
When the PU 21 recognizes the passage of the time T by the timer 23, as shown in FIG. 4, the communication cutoff valve 33 is changed from the open state to the closed state, the heater 35 is changed from the main heating state to the preheating state, and then the atmosphere is released. The valve 34 is changed from the closed state to the open state, the dehydration-indicating lamp 26 is turned off, and the end indicator lamp 27 is blinked for a certain time.

As a result, as shown in FIG. 5, the pressure in the vacuum buffer tank 15 is maintained at the target pressure Pt, while the pressure in the umbrella dehydration vacuum tank 10 becomes the atmospheric pressure Patm.

The owner of the umbrella 1 recognizes that the dehydration of the umbrella 1 is completed by looking at the blinking of the end indicator light 27, opens the lid 12 of the apparatus, and opens the umbrella dehydration vacuum tank at atmospheric pressure. After removing the umbrella 1 from 10, the lid 12 is closed.

As described above, in this embodiment, when the umbrella 1 is housed in the umbrella dehydration vacuum tank 10 and the lid 12 is closed,
Since the vacuum buffer tank 15 under reduced pressure and the umbrella dewatering vacuum tank 10 communicate with each other, the pressure of the umbrella dewatering vacuum tank 10 in which the umbrella 1 is housed rapidly decreases. Therefore, the time for depressurizing the umbrella dehydration vacuum tank 10 can be shortened, and the dehydration time can be shortened. Moreover, in the present embodiment, since the inside of the umbrella dehydration vacuum tank 10 is preheated before the umbrella 1 is stored, and further the main heating is performed when the umbrella 1 is stored, the evaporation efficiency of rainwater attached to the umbrella is increased. Therefore, the dehydration time can be further shortened.

In this embodiment, the vacuum buffer tank 1
When the vacuum buffer capacity of 5 is set to 3 times the capacity of the umbrella dehydration vacuum layer 10 and the target pressure Pt in the vacuum buffer tank 15 is set to the saturated vapor pressure at 15 ° C., the time T is further shortened. In order to achieve this, the vacuum buffer capacity of the vacuum buffer tank 15 should be made larger and the target pressure Pt in the vacuum buffer tank 15 should be the saturated vapor pressure at a lower temperature. Needless to say, the time T can be shortened even if the heating amount of the heater 35 is increased.

Further, in this embodiment, the inside of the umbrella dehydration vacuum tank 10 is preheated before the umbrella 1 is stored, but the present invention is not limited to this. For example, the lid 12 is opened. The main heating may be performed suddenly from when the lid 12 is closed or after the lid 12 is closed.

Further, although the dehydration of the umbrella 1 is realized by the time management by the timer 23 here, for example, a thermometer is provided in the umbrella dehydration vacuum tank 10 and the inside of the umbrella dehydration vacuum tank 10 is provided. When the rate of temperature change starts to rise rapidly, it may be recognized that the heat of vaporization due to evaporation of rainwater has almost disappeared, and the dehydration of the umbrella 1 may be terminated at this time.

Further, in this embodiment, as shown in FIG. 3, a plurality of rod-shaped far-infrared heaters 3 are used as the heater 35.
Although 5a is used, any can be used as long as the umbrella in the umbrella dehydration vacuum tank 10 can be efficiently heated. For example, a coil is wound around the outer circumference of the umbrella dehydration vacuum tank 10 The inside may be induction heated. However, considering that the interior of the purred umbrella 1 is heated,
It is preferable that the far infrared heater of the present embodiment allows heat to penetrate into the inside of the umbrella 1.

Further, in the present embodiment, when the dehydration is completed, the end indicator light 27 is made to blink, and the owner of the umbrella 1
The lid 12 is opened to inform that the umbrella 1 may be taken out from the umbrella dehydration vacuum tank 10. However, in order to prevent the lid 12 from being opened during dehydration, the dehydration in progress indicator light 26 is turned on. A locking mechanism may be provided to lock the lid 12 during this time so that the lid 12 cannot be opened while the lid 12 is open.

Further, in the present embodiment, the outer container 16 is supported by the vibration-proof legs 19. However, for example, when it is not raining, the device is stored in a warehouse room or the like, and when it is raining, If you put a device at the entrance of the building, that is,
If it is necessary to consider the movement of the device, the anti-vibration leg 19
Instead of, a caster with a stopper may be provided.

Next, a second embodiment of the apparatus for dehydrating a wet umbrella according to the present invention will be described with reference to FIGS. 6 and 7. In these figures, the same parts as those in the first embodiment are designated by the same reference numerals, and duplicate explanations are omitted.

The dehydrator of the present embodiment has a plurality of umbrella dehydrator vacuum devices 10, 1 in addition to one vacuum buffer tank 15a.
0 and 10 are arranged to connect one vacuum buffer tank 15a and a plurality of umbrella dehydration vacuum tanks 10, 10, 10 to each other to cut off the communication.
a, 33a and 33a are connected, and the other basic configuration is the same as that of the first embodiment. As described above, the plurality of umbrella dehydration vacuum tanks 10 are provided so that the plurality of umbrellas 1 can be dehydrated at one time. Therefore, the vacuum buffer capacity of one vacuum buffer tank 15a is set so that the pressure in each umbrella dehydration vacuum tank 10 can be rapidly reduced even if the umbrellas 1 are placed in each umbrella dehydration vacuum tank 10 almost at the same time. The capacity is larger than that of the first embodiment, and is about 5 times the capacity of one umbrella dehydration vacuum tank 10.

Further, in this embodiment, each umbrella dehydration vacuum tank 1
For each umbrella dehydration vacuum tank so that the operating status of 0 can be confirmed, during-dewatering indicator light and end indicator light (not shown)
Is provided. Further, in the first embodiment, one opening of the atmosphere release valve 34 is exposed to the umbrella dehydration vacuum tank 10 and the other opening is exposed to the outside of the apparatus. Is exposed to the inside of the outer container 16a. In this way, the other opening of the atmosphere release valve 34a is connected to the outer container 1
When facing the inside of 6a, it is possible to prevent foreign matter from entering from the outside of the apparatus into the umbrella dehydration vacuum tank 10 through the atmosphere release valve 34a.

As described above, when a plurality of umbrella dehydration vacuum tanks 10 are provided, one larger vacuum buffer tank 15a is provided.
On the other hand, in addition to that, a plurality of umbrella dehydration vacuum tanks 10, 10,
By connecting 10 in parallel, compactification can be achieved. Even when the umbrella dehydration vacuum tank 10 is provided in the vacuum tank buffer tank 15 as in the first embodiment,
A plurality of umbrella dehydration vacuum tanks may be provided in the vacuum buffer tank.

[0040]

According to the present invention, since the pressure inside the umbrella dehydration vacuum tank is reduced to evaporate the water from the wet umbrella contained therein, the wet umbrella can be dehydrated. In addition, since a vacuum buffer tank was provided separately from the umbrella dehydration vacuum tank, when the umbrella was placed in the umbrella dehydration vacuum tank, the communication shutoff valve was opened to rapidly reduce the pressure inside the umbrella dehydration vacuum tank. Therefore, the dehydration time can be shortened. Further, in the case where the heating means is provided, evaporation of water adhering to the umbrella can be promoted, so that the dehydration time can be further shortened.

[Brief description of drawings]

FIG. 1 is a sectional view of a dehydrator according to a first embodiment of the present invention.

FIG. 2 is a circuit block diagram of the dehydrator according to the first embodiment of the present invention.

FIG. 3 is a perspective view of a heater according to the first embodiment of the present invention.

FIG. 4 is a time chart of the dehydrator according to the first embodiment of the present invention.

FIG. 5 is a graph showing changes in pressure in the umbrella dehydration vacuum tank and the vacuum buffer tank according to the first embodiment of the present invention.

FIG. 6 is a cross-sectional view of a dehydrator according to a second embodiment of the present invention.

7 is a sectional view taken along line VI-VI in FIG.

[Explanation of symbols]

1 ... Umbrella, 10 ... Umbrella dewatering vacuum tank, 11 ... Vacuum tank body, 12
... Lid, 15, 15a ... Vacuum buffer tank, 16, 16a ...
Outer container, 17 ... Drain receiving tray, 20 ... Control circuit, 2
1 ... CPU, 22 ... Memory, 23 ... Timer, 26 ... Dewatering indicator light, 27 ... End indicator light, 29 ... Power switch, 3
0 ... Drive circuit, 31 ... Vacuum pump, 32 ... Drive motor,
33, 33a ... Communication cutoff valve, 34, 34a ... Atmosphere release valve, 35 ... Heater, 35a ... Rod-shaped far infrared heater, 36
... Lid sensor, 37 ... Umbrella sensor, 38 ... Pressure sensor, 39
… Drain sensor.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kihei Ito             2-10-8 Minamikarasuyama, Setagaya-ku, Tokyo Water             Oke Keiki Co., Ltd. (72) Inventor Yoshiyuki Goto             2-10-8 Minamikarasuyama, Setagaya-ku, Tokyo Water             Oke Keiki Co., Ltd. (72) Inventor Yoshihiko Shimoda             2-10-8 Minamikarasuyama, Setagaya-ku, Tokyo Water             Oke Keiki Co., Ltd. (72) Inventor Koji Sekiguchi             2-10-8 Minamikarasuyama, Setagaya-ku, Tokyo Water             Oke Keiki Co., Ltd. F term (reference) 3L113 AA05 AB06 AB10 AC08 AC10                       AC24 AC67 CA03 CA10 CB16                       CB34 CB35 CB38 DA10 DA14

Claims (12)

[Claims] 1. At least one umbrella dehydration vacuum tank in which an umbrella is placed, a vacuum buffer tank in communication with each of the at least one umbrella dehydration vacuum tank, and a vacuum pump for vacuuming the inside of the vacuum buffer tank. A wet-shut-down means provided at a communication portion between the one or more umbrella dewatering vacuum tanks and the vacuum buffer tank, and a communication cut-off means for setting the communication portion to a cut-off state and a communication state. Dehydrator. 2. The dewatering device for a wet umbrella according to claim 1, further comprising: heating means for heating the inside of the umbrella dewatering vacuum tank. 3. The dewatering device for a wet umbrella according to claim 1, wherein the umbrella dewatering vacuum tank has a vacuum in which an opening serving as an entrance of the umbrella and a storage chamber accommodating the umbrella are formed. A lid detection unit that has a tank main body and a lid that closes the opening of the vacuum tank main body, detects lid opening and closing of the umbrella dehydration vacuum tank, and an umbrella is stored in the umbrella dehydration vacuum tank. When the closed state of the lid is detected by the umbrella detecting means that detects that the lid is closed, and the storage of the umbrella is detected by the umbrella detecting means, the communication cutoff means disconnects the communication portion. A wet umbrella dewatering device comprising: a control unit that brings the communication state into communication. 4. The wet umbrella dewatering device according to claim 1, wherein the umbrella dewatering vacuum tank includes a vacuum tank body having an opening serving as an entrance of the umbrella and a storage chamber for accommodating the umbrella, and the vacuum tank. A lid closing means for closing the opening of the main body, and a lid detecting means for detecting opening / closing of the lid of the umbrella dehydration vacuum tank; and an umbrella detecting means for detecting that an umbrella is stored in the umbrella dehydration vacuum tank. A heating means for heating the inside of the umbrella dehydration vacuum tank; and a closed state of the lid detected by the lid detection means, and a storage of the umbrella detected by the umbrella detection means, the communication cutoff means. A control means for changing the communication part from the cut-off state to the communication state, and for starting the heating of the inside of the umbrella dehydration vacuum tank by the heating means or for performing the main heating from the preheating state. Dehydration of wet umbrella characterized by Location. 5. The wet umbrella dewatering device according to claim 3, wherein the control means sets a predetermined time after the communication cutoff means brings the communication portion into the communication state. After a certain period of time, the communication portion is brought into a blocked state, and a dehydrator for a wet umbrella characterized by the above-mentioned. 6. The apparatus for dehydrating a wet umbrella according to claim 5, further comprising an atmosphere releasing means for bringing the umbrella dehydrating vacuum tank into an atmosphere releasing state for releasing the atmosphere and a shutoff state for interrupting the atmosphere, the control means comprising: After the umbrella dewatering vacuum tank is switched from the atmosphere open state to the blocked state by the atmosphere release means, the communication portion is switched from the blocked state to the communication state by the communication blocking means, and after the predetermined time has elapsed, the A dehydrating device for a wet umbrella, wherein the communication interrupting means causes the communication portion to be in an interrupted state, and the atmosphere releasing means causes the umbrella dehydration vacuum tank to change from the interrupted state to an atmosphere released state. 7. The wet umbrella dewatering device according to claim 1, wherein a vacuum buffer capacity of one of the vacuum buffer tanks is larger than a capacity of one of the umbrella dewatering vacuum tanks. A dehydrating device for a wet umbrella, which is characterized in that 8. The wet umbrella dehydrator according to any one of claims 1 to 7, wherein a buffer tank pressure detecting means for detecting a pressure in the vacuum buffer tank, and a pressure in the vacuum buffer tank are A wet umbrella dewatering device comprising: pump control means for controlling the vacuum pump so as to maintain a predetermined vacuum pressure. 9. The dewatering device for a wet umbrella according to claim 1, wherein one or more of the umbrella dewatering vacuum tanks are arranged in one of the vacuum buffer tanks. Characteristic wet umbrella dehydrator. 10. The dewatering device for a wet umbrella according to claim 1, further comprising a plurality of the umbrella dehydration vacuum tanks, the plurality of umbrella dehydration vacuum tanks being one of the vacuum buffer tanks. A wet umbrella dewatering device, which is arranged outside. 11. The wet umbrella dehydrator according to claim 1, wherein the vacuum pump has an exhaust port for exhausting gas in the vacuum buffer tank, A wet umbrella dewatering device, comprising a container having a drain reservoir for communicating with the exhaust port and storing a liquid. 12. The wet umbrella dewatering device according to claim 11, wherein the container is an outer container that houses the vacuum buffer tank and the vacuum pump.