Dishwasher lifting system

Abstract

This system provides a hygienic dishwasher lifting and lowering system that does not require space to install a dishwasher near the kitchen or sink. [Solution] The dishwasher lifting system 100 is a dishwasher lifting system 100 that raises and lowers a dishwasher 10 between a housing chamber 20 provided below the floor 70 and an exposed space 7 above the housing chamber on the floor, and comprises a fixing base 5 for detachably fixing the dishwasher in a horizontal position, a lifting device 4 provided inside the housing chamber for raising and lowering the fixing base on which the dishwasher is fixed between a lower position in the housing chamber and an upper position in the exposed space, a water supply mechanism 30 that supplies pre-use washing water to the dishwasher located at the lower position, a drainage mechanism 40 that discharges post-use washing water from the dishwasher located at the lower position, and a power supply mechanism 50 that supplies power for operation to the dishwasher located at the lower position.

Description

【Technical Field】 【0001】 The present invention relates to a lifting system for a dishwasher. 【Background Art】 【0002】 In recent years, dishwashers have been widely popularized not only for commercial use but also for household use. In particular, household dishwashers are widely available in a wide range from small ones to large ones according to the family composition. In addition, there is known a type that incorporates a household dishwasher into a part of a kitchen (Patent Document 1). In addition, there is known a dishwasher comprising a cleaning unit installed under the floor, in which a rack for storing dishes is disposed so as to be movable up and down, and a lifting device for supporting the dish rack and moving the dish rack up and down between a cleaning position and a position on the floor, and a dishwasher for spraying cleaning water or the like onto the dishes in the dish rack to perform cleaning is provided in the cleaning unit (Patent Document 2). 【Prior Art Documents】 【Patent Documents】 【0003】 【Patent Document 1】 Japanese Unexamined Patent Application Publication No. 2024-036524 【Patent Document 2】 Japanese Unexamined Patent Application Publication No. 2-92326 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0004】 Dishwashers are generally installed on the floor near a sink due to the relationship between water supply and drainage. However, in a studio apartment or a small house, etc., it is often difficult to secure an installation space near the sink even for a small dishwasher, and there is often no installation space for a type that is incorporated into a part of the kitchen. In addition, for a dishwasher having a lifting device in the cleaning unit as described above, there is a problem in terms of hygiene because the lifting device is exposed to cleaning water or the like together with the dishes. 【0005】 This invention was made to solve the above-mentioned problems, and aims to provide a dishwasher lifting system that does not require space to install a dishwasher near the kitchen or sink, and is also hygienic. [Means for solving the problem] 【0006】 To achieve the above objective, a dishwasher lifting system according to one aspect of the present invention is a dishwasher lifting system for raising and lowering a dishwasher between a housing chamber provided below the floor and an exposed space above the housing chamber on the floor, comprising: a fixing base for detachably fixing the dishwasher in a horizontal position; and a lifting device provided inside the housing chamber for raising and lowering the fixing base on which the dishwasher is fixed between a lower position within the housing chamber and an upper position in the exposed space. And, A water supply mechanism located below the above position supplies pre-wash water to the dishwasher. And, A drainage mechanism located below the dishwasher for discharging used washing water. And, The device comprises a power supply mechanism that supplies power for operation to the dishwasher located at the lower position, the housing chamber having an opening in the floor through which the dishwasher, fixed to the fixed base of the lifting device, can pass vertically, a lid member for opening and closing the opening, a tap water supply port connected to a tap water pipe, a sewage outlet connected to a sewage pipe, and a power distribution terminal connected to a power distribution line, the water supply mechanism having a pre-use wash water inlet end connectable to the tap water supply port, a pre-use wash water outlet end connectable to the wash water supply port of the dishwasher, and a pre-use wash water passage connecting the pre-use wash water inlet end and the pre-use wash water passage However, Dishwasher If it is in the aforementioned upper position The inlet end of the pre-use cleaning water and the outlet end of the pre-use cleaning water are separated from each other in a blocked state, and When the dishwasher is in the lower position, the pre-wash water inlet and the pre-wash water outlet areThe drainage mechanism includes a first automatic joint mechanism which is electrically connected to each other, and the drainage mechanism includes a used wash water inlet end which can be connected to the wash water outlet of the dishwasher, a used wash water outlet end which can be connected to the sewer outlet, and a used wash water passage that connects the used wash water inlet end and the used wash water outlet end, and the used wash water passage However, Dishwasher If it is in the aforementioned upper position The inlet end for the used cleaning water and the outlet end for the used cleaning water are separated from each other in a blocked state, and When the dishwasher is in the lower position, the used wash water inlet end and the used wash water outlet end are The power supply mechanism includes a second automatic coupling mechanism which is coupled to each other in an electrically conductive state, and the power supply mechanism includes a first connection terminal which can be connected to the power distribution terminal, a second connection terminal which can be connected to the power receiving terminal of the dishwasher, and a conductor which connects the first connection terminal and the second connection terminal, and the conductor However, Dishwasher If it is in the aforementioned upper position The first connection terminal and the second connection terminal are separated from each other in a disconnected state and When the dishwasher is in the lower position, the first connection terminal and the second connection terminal are Includes a disconnection mechanism that connects the components in an electrically conductive state. nothing . 【0007】 In this configuration, the dishwasher's lifting system is used as follows: 【0008】 First, the lid is removed to open the opening of the storage chamber. Next, the dishwasher is fixed to the lifting device's mounting base. Then, the pre-use wash water inlet and pre-use wash water outlet of the water supply mechanism are connected to the tap water supply port and the dishwasher's wash water supply port, respectively. is, 1. The pre-use wash water inlet end and pre-use wash water outlet end of the connecting joint mechanism are electrically connected to each other. Next, the post-use wash water inlet end and post-use wash water outlet end of the drainage mechanism are connected to the dishwasher's wash water outlet and sewer outlet, respectively. is, The inlet and outlet ends of the two connecting joint mechanisms are electrically connected to each other. Next, the first and second connection terminals of the power supply mechanism are connected to the power distribution terminal and the power receiving terminal of the dishwasher, respectively. is, The first and second connection terminals of the circuit mechanism are connected to each other in a conductive state. 【0009】 In this state, the lifting mechanism is activated to raise the dishwasher to its upper position. At this time, the water supply mechanism is, 1. The pre-use wash water inlet and pre-use wash water outlet of the joint mechanism are separated from each other in a sealed state. Also, the drainage mechanism is, The two joint mechanisms have a post-use cleaning water inlet end and a post-use cleaning water outlet end that are separated from each other in a blocked state. Also, the power supply mechanism... is, The first connection terminal and the second connection terminal are separated from each other in a disconnected state. 【0010】 In this state, the dishes to be washed are loaded into the dishwasher. Next, the lifting mechanism is activated to lower the dishwasher to its lowered position. At that time, the first The pre-use wash water inlet end and the pre-use wash water outlet end of the joint mechanism are connected in an electrically conductive state. In addition, the drainage mechanism is, The two joint mechanisms connect the inlet end and outlet end of the post-use cleaning water to each other in an electrically conductive state. Furthermore, the power supply mechanism... is, The first and second connection terminals are connected in a conductive state. 【0011】 Next, the dishwasher is activated and the dishes to be washed are washed. Once the washing of the dishes is complete, the lifting mechanism is activated to raise the dishwasher to its upper position. Then, the washed dishes are removed from the dishwasher. Next, the lifting mechanism is activated to lower the dishwasher to its lower position. The movements of the water supply mechanism, drainage mechanism, and power supply mechanism accompanying the raising and lowering of the dishwasher are as described above, so their explanation is omitted. 【0012】 This type of dishwasher lifting system eliminates the need for space in the kitchen to install a dishwasher. 【0013】 The system may further include a safety device configured to prevent the lifting device from operating unless it detects that the opening of the storage chamber is open. 【0014】 According to this configuration, when the opening of the storage chamber is closed by the lid member, it is possible to prevent the dishwasher from being lifted by the lifting device and an accident from occurring. 【0017】 Further, the dishwasher may be further provided, and the dishwasher may be provided with only one rack on which the dishes to be washed are placed. According to this configuration, the height of the dishwasher can be reduced, and the depth dimension from the floor of the storage chamber can be made smaller. 【Effect of the Invention】 【0018】 The present invention has the effect of providing a hygienic dishwasher lifting system without requiring a space for installing the dishwasher near the sink. 【Brief Description of the Drawings】 【0019】 [Figure 1] FIG. 1 is a cross-sectional view showing an outline of an example of the configuration of a dishwasher lifting system according to Embodiment 1 of the present invention. [Figure 2] FIG. 2 is a plan view of the dishwasher lifting system of FIG. 1. [Figure 3] FIG. 3 is a view showing an example of the link mechanism of FIG. 1. [Figure 4] FIG. 4 is a view showing an example of the connection mechanism between the water supply hose reel and the water supply pipe of FIG. 1. [Figure 5] FIG. 5 is a view showing an example of the connection mechanism between the drain hose reel and the drain pipe of FIG. 1. [Figure 6] FIG. 6 is a view showing an example of the connection mechanism between the wire reel and the power supply wire of FIG. 1. [Figure 7] FIG. 7 is an external view showing an example of the dishwasher of FIG. 1. [Figure 8] FIG. 8 is a block diagram showing an example of the configuration of the control system of the dishwasher lifting system of FIG. 1. [Figure 9] FIG. 9 is a view showing the operation of the dishwasher lifting system of FIG. 1, showing a state in which the lid member of the opening on the floor is removed. [Figure 10] Figure 10 is a diagram showing the operation of the dishwasher lifting system shown in Figure 1, with the fixed base raised to the upper position. [Figure 11] Figure 11 is a cross-sectional view showing an overview of an example of the configuration of a dishwasher lifting system according to Embodiment 2 of the present invention. [Figure 12] Figure 12 is a cross-sectional view showing an overview of an example of the configuration of a dishwasher lifting system according to Embodiment 3 of the present invention. [Figure 13] Figure 13 is a cross-sectional view showing an example of the configuration of the first automatic coupling mechanism shown in Figure 12. [Figure 14] Figure 14 is a cross-sectional view showing an example of the configuration of the second automatic coupling mechanism shown in Figure 12. [Figure 15] Figure 15 shows an example of the disconnection mechanism shown in Figure 12. [Figure 16] Figure 16 is a block diagram showing an example of the configuration of the control system for the dishwasher lifting system shown in Figure 12. [Modes for carrying out the invention] 【0020】 Embodiments of the present invention will be described below with reference to the drawings. In the following, the same or corresponding elements are denoted by the same reference numerals throughout all drawings, and redundant descriptions are omitted. Furthermore, since the following figures are for illustrative purposes of this disclosure, elements unrelated to this disclosure may be omitted, dimensions may be inaccurate due to exaggeration, simplifications may occur, and the forms of corresponding elements may not match across multiple figures. Also, this disclosure is not limited to the following embodiments. 【0021】 (definition) In the following, forward rotation and reverse rotation of the motor refer to clockwise and counterclockwise rotation, respectively. 【0022】 The screw shaft of the ball screw mechanism has a right-hand thread, and when the motor connected to the screw shaft rotates in the forward and reverse directions, the movable body screwed onto the screw shaft moves closer to and further away from the motor, respectively. 【0023】 (Embodiment 1) 【0024】 [composition] Figure 2 is a cross-sectional view showing an overview of an example configuration of a dishwasher lifting system 100 according to Embodiment 1 of the present invention. Figure 2 is a plan view of the dishwasher lifting system 100 shown in Figure 1. In Figures 1 and 2, each element of the dishwasher lifting system 100 is schematically simplified to make Figure 1 easier to understand. In particular, Figure 1 omits the illustration of some of the elements shown in Figure 2. For convenience, in order to specify the structure of the dishwasher lifting system 100, the directions shown in Figures 1 and 2 are referred to as the left-right direction, the up-down direction, and the front-back direction. 【0025】 Referring to Figures 1 and 2, the dishwasher lifting system 100 of Embodiment 1 comprises a base 1, a first motor M1, a first ball screw mechanism 2, a second motor M2, a second ball screw mechanism 3, a link mechanism 4, a fixing base 5, a fixing device 6, a water supply mechanism 30, a drainage mechanism 40, a power supply mechanism 50, and an obstacle sensor S. These elements will be described in detail below with reference to Figures 1 to 8. The first motor M1, the first ball screw mechanism 2, the second motor M2, the second ball screw mechanism 3, the link mechanism 4, the third movable body 5a, and the fourth movable body 5b constitute the lifting device LFD. 【0026】 <Installation environment for the dishwasher lifting system 100> The dishwasher lifting system 100 is installed under the floor 70 of a building, for example, in the kitchen. Specifically, a housing chamber 20 is provided under a suitable location on the floor 70. The housing chamber 20 is formed in the shape of a box with an open top. Here, the housing chamber 20 is formed in the shape of a rectangular parallelepiped, for example. The housing chamber 20 is enclosed by walls 21. Element mounting members 22 for attaching elements of the dishwasher lifting system 100 are provided on the sides of the walls 21. The element mounting members 22 are formed in the shape of a hollow column with a rectangular cross-section. 【0027】 An opening 71 is provided in the center of the floor 70 that covers the upper surface of the storage chamber 20. The opening 71 is sized to allow the fixed base 5 of the dishwasher lifting system 100 or the dishwasher 10 fixed to the fixed base 5 to pass through vertically with sufficient clearance. A stepped portion 71a is provided on the inner circumferential surface of the opening 71. This opening 71 is opened and closed by a lid member 72. Here, the lid member 72 is operated manually to open and close the opening 71. This is to prevent the lid member 72 from unexpectedly rising up, as the user walks on the lid member 72 when the dishwasher lifting system 100 is not in use. Of course, with safety devices and the like, the lid member 72 may be opened and closed by an opening and closing mechanism. The lid member 72 is made of, for example, the same material as the floor 70. The lid member 72 is formed in a flat plate shape with an outer shape that fits into the opening 71. The lid member 72 is formed in a rectangular shape to match the shape of the fixing base 5. A stepped portion 72a is provided on the outer circumference of the lid member 72 to engage with the stepped portion 71a of the opening 71. A suitable handle (not shown) is provided on the upper surface of the lid member 72 for the user to grasp the lid member 72. 【0028】 For example, a water supply port 23 connected to a water supply pipe is provided on the front inner surface of the right side wall 22b of the element mounting member 22 of the storage chamber 20, a sewage outlet 24 connected to a sewage pipe is provided on the rear inner surface of the left side wall 22a of the element mounting member 22, and a power distribution terminal 25 connected to a power distribution line is provided on the rear inner surface of the right side wall 22b of the element mounting member 22. 【0029】 Above the floor 70 above the storage chamber 20, an exposed space 7 is envisioned, which is the space from which the dishwasher 10, fixed to the fixed base 5 of the lifting device LFD, is exposed from the storage chamber 20 by the lifting device LFD. The exposed space 7 is, for example, about 1m to 1.5m square in plan view and about 1m to 2m in height. 【0030】 <Base 1> Base 1 is a platform that supports the lifting device LFD. Base 1 is provided on the bottom surface of the housing chamber 20, with a space between it and the inner circumferential surface of the housing chamber 20, and extends in the left-right direction. A first sliding groove GR1 is formed on the upper surface of base 1 into which the first and second movable bodies 2b and 3b of the lifting device LFD are slidably fitted. The first sliding groove GR1 is formed in the central part of base 1 and extends in the left-right direction. The first sliding groove GR1 has a width of about half the width of the fixed base 5 (about 40% in this case), a length longer than the stroke of the first and second movable bodies 2b and 3b of the lifting device LFD, and a depth that ensures the lateral stability of the link mechanism 4 of the lifting device LFD. A first motor M1 is installed near the left end of the first sliding groove GR1 of base 1, with its main shaft facing to the right. The second motor M2 is installed near the right end of the first sliding groove GR1 of the base 1, with its main shaft facing left. 【0031】 <Lifting device LFD> The lifting device LFD raises and lowers the fixed base 5 on which the dishwasher 10 is fixed, between a lower position within the storage chamber 20 and an upper position in the exposed space 7. The lower position is set, for example, at a height in the middle of the storage chamber 20. The upper position is preferably set at a height that allows the user to load and unload dishes from the dishwasher 10 by slightly bending down, for example, at a height of about 30cm to 70cm from the floor 70. The lifting device LFD is not particularly limited as long as it is a device that can raise and lower the fixed base 5 on which the dishwasher 10 is fixed. Examples of lifting devices LFD include a pantograph type lifting device and a lift device. A pantograph type lifting device raises and lowers an object by extending and retracting a pantograph-type link mechanism in the vertical direction. A lift device raises and lowers an object by sliding a movable shaft that extends in the vertical direction vertically relative to a fixed shaft that extends in the vertical direction. In this embodiment 1, a pantograph type lifting device is used. 【0032】 The lifting device LFD includes a first motor M1, a first ball screw mechanism 2, a second motor M2, a second ball screw mechanism 3, a link mechanism 4, a third movable body 5a, and a fourth movable body 5b. The first ball screw mechanism 2 includes a first screw shaft 2a and a first movable body 2b screwed onto the first screw shaft 2a. The base end of the first screw shaft 2a is connected to the tip of the first motor M1. The first movable body 2b is slidably fitted into the first sliding groove GR1. As a result, the first movable body 2b slides to the left and right as the first motor M1 rotates forward or backward. The base end of the second screw shaft 3a is connected to the tip of the second motor M2. The second movable body 3b is slidably fitted into the first sliding groove GR1. As a result, the second movable body 3b slides to the right or left as the second motor M2 rotates forward or backward. 【0033】 Figure 3 shows an example of the link mechanism 4 in Figure 1. A realistic link mechanism 4 is shown in Figure 3. Referring to Figure 3, the link mechanism 4 is configured as a pantograph-type link mechanism, in which eight plate-shaped link members 4a, arranged in two stages in an X shape, are rotatably fastened to both ends of four support shafts 4b by appropriate fastening members 4c. The lower ends of the link mechanism 4 are rotatably connected to both ends of the first movable body 2b and both ends of the second movable body 3b, respectively. The upper ends of the link mechanism 4 are rotatably connected to both ends of the third movable body 5a and both ends of the fourth movable body 5b, respectively. 【0034】 Referring to Figure 1, the third movable body 5a and the fourth movable body 5b are slidably fitted into the second sliding groove GR2 and the third sliding groove GR3 formed on the lower surface of the fixed base 5, respectively. 【0035】 The first and second motors M1 and M2 are, for example, stepping motors or servo motors. Stepping motors or servo motors allow for precise setting (determining) of the upper and lower positions of the fixed base 5, as described later, by rotation angle. 【0036】 Alternatively, the second movable body 3b may be fixed to the base 1, eliminating the second motor M2, and the fourth movable body 5b may be fixed to the fixed base 5. This would simplify the configuration. 【0037】 <Fixed stand 5> The fixed base 5 is a base for fixing the dishwasher 10. A second sliding groove GR2 and a third sliding groove GR3 are provided in the center of the lower surface of the fixed base 5, extending in the left-right direction. The third movable body 5a, to which the upper left end of the link mechanism 4 is connected, is slidably fitted into the second sliding groove GR2. The fourth movable body 5b, to which the upper right end of the link mechanism 4 is connected, is slidably fitted into the third sliding groove GR3. The second sliding groove GR2 is formed to have a position and length corresponding to the stroke of the third movable body 5a. The third sliding groove GR3 is formed to have a position and length corresponding to the stroke of the fourth movable body 5b. 【0038】 The fixing base 5 is not particularly limited as long as it is large and durable enough to securely hold the dishwasher 10. Examples of materials for the fixing base 5 include wood, plastic, and metal. 【0039】 <Fixing fixture 6> The fixing device 6 is a component that secures the dishwasher 10 to the base 5. As shown in Figure 1, the fixing device 6 surrounds the dishwasher 10 and is installed to prevent the dishwasher 10 from moving horizontally. The fixing device 6 is fixed to the base 5 by screws, adhesive, etc. Examples of materials for the fixing device 6 include wood, plastic, resin, and metal. 【0040】 <Water supply mechanism 30> The water supply mechanism 30 is for supplying washing water from the tap water supply port 23 to the dishwasher 10. The water supply mechanism 30 includes a water supply hose winding reel 31, a support column 32, a water supply hose section 33, and a water supply hose section relay member 34. The water supply hose section 33 includes a main water supply hose section 33a and a secondary water supply hose section 33b. The water supply mechanism 30 will be described in detail below. 【0041】 Referring to Figures 1 and 2, a first base plate 35 is provided on the upper part of the inner surface of the right side wall 22b of the element mounting member 22 of the housing chamber 20 so as to protrude to the left. A pair of support columns 32 are erected on the upper surface of this first base plate 35 at intervals in the front-rear direction. A water supply hose winding reel 31 is rotatably mounted on this pair of support columns 32. Therefore, the water supply hose winding reel 31 is provided so as to have a flange that extends in the left-right direction. The front end 31a of the boss of the water supply hose winding reel 31 (see Figure 4) is connected to the end of the water supply pipe 36. The rear end 31b of the boss of the water supply hose winding reel 31 (see Figure 4) is connected to the main shaft of a third motor M3 provided on the first base plate 35. The main water supply hose section 33a consists of a first portion, from the tap water supply port 23 to the front end 31a of the boss of the water supply hose winding reel 31, which is made up of water supply piping 36, and a second portion, from the boss of the water supply hose winding reel 31 (see Figure 4) to the inlet of the water supply hose section relay member 34, which is made up of hose. The secondary water supply hose section 33b here consists of water supply piping. 【0042】 The water supply hose relay member 34 is provided at the right end of the fixing base 5, in a position such that the second portion of the main water supply hose 33a extends in the left-right direction. The water supply hose relay member 34 has, for example, a through hole through which washing water flows. The tip of the main water supply hose 33a is connected to the inlet of the through hole, and the base end of the auxiliary water supply hose 33b is connected to the outlet of the through hole. The tip of the auxiliary water supply hose 33b is connected to the washing water supply port 11 of the dishwasher 10. 【0043】 Figure 4 shows an example of the connection mechanism between the water supply hose winding reel 31 and the water supply piping 36 shown in Figure 1. Referring to Figure 4, the central and front end portions 31a of the boss of the water supply hose winding reel 31 are formed to be hollow, and a hose insertion hole 31c is provided in the central portion of the boss, penetrating the hollow portion. The base end of the second portion of the main water supply hose section 33a wound on the water supply hose winding reel 31 is inserted through this hose insertion hole 31c in a watertight manner using a sealant or the like. On the other hand, the front end portion 31a and rear end portion 31b of the boss of the water supply hose winding reel 31 are rotatably supported by a pair of support columns 32 via a pair of bearings 39. A mechanical seal mechanism is configured at the tip of the front end portion 31a of the boss of the water supply hose winding reel 31. Specifically, an annular groove 37 is formed at the tip of the front end portion 31a of the boss of the water supply hose winding reel 31. On the other hand, the tip of the water supply pipe 36 is formed in a flange shape that fits onto the tip of the front end 31a of the boss of the water supply hose winding reel 31 so as to cover the annular groove 37. An annular sealing member 38 is placed in the annular groove 37, and the flange-shaped tip of the water supply pipe 36 is fitted onto the tip of the front end 31a of the boss of the water supply hose winding reel 31. As a result, washing water is supplied watertightly from the water supply pipe 36 to the second portion of the hose of the main water supply hose section 33a that is wound around the rotating water supply hose winding reel 31. The base end of the water supply pipe 36 constitutes a washing water inlet end that can be connected to the tap water supply port 23, and the tip of the secondary water supply hose section 33b constitutes a washing water inlet end that can be connected to the washing water supply port 11 of the dishwasher 10. 【0044】 Referring to Figure 2, when the third motor M3 rotates in the reverse direction, the water supply hose winding reel 31 unwinds the second portion of the hose from the main water supply hose section 33a, and when the third motor M3 rotates in the forward direction, the water supply hose winding reel 31 winds up the second portion of the hose from the main water supply hose section 33a. 【0045】 The second part of the main water supply hose section 33a is made of, for example, a pressure-resistant hose. A regular hose can also be used, but a pressure-resistant hose is preferable because its cross-section is less likely to be crushed when wound onto the water supply hose winding reel 31. The third motor M3 is made of, for example, a stepping motor or a servo motor. This is because it allows for precise control of the rotation angle. 【0046】 <Drainage mechanism 40> The drainage mechanism 40 is for discharging used wash water from the wash water outlet 12 of the dishwasher 10 to the sewer outlet 24. The drainage mechanism 40 includes a drain hose winding reel 41, a support column 42, a drain hose section 43, and a drain hose section relay member 44. The drain hose section 43 includes a main drain hose section 43a and a secondary drain hose section 43b. The drainage mechanism 40 will be described in detail below. 【0047】 Referring to Figures 1 and 2, a second base plate 45 is provided on the lower part of the inner surface of the left wall 22a of the element mounting member 22 of the housing chamber 20 so as to protrude to the right. A pair of support columns 42 are erected on the upper surface of this second base plate 45 at intervals in the front-rear direction. A drain hose winding reel 41 is rotatably mounted on this pair of support columns 42. Therefore, the drain hose winding reel 41 is provided so as to have a flange that extends in the left-right direction. The rear end 41a of the boss of the drain hose winding reel 41 (see Figure 5) is connected to the end of the drain pipe 46. The front end 41b of the boss of the drain hose winding reel 41 (see Figure 5) is connected to the main shaft of the fourth motor M4 provided on the second base plate 45. The main drain hose section 43a consists of a first portion, from the sewer outlet 24 to the rear end 41a of the boss of the drain hose winding reel 41, which is made up of drain piping 46, and a second portion, from the boss of the drain hose winding reel 41 (see Figure 5) to the inlet of the drain hose section relay member 44, which is made up of hose. The secondary drain hose section 43b here consists of drain piping. 【0048】 The drain hose relay member 44 is provided at the left end of the fixed base 5, in a position where the second portion of the main drain hose 43a extends in the left-right direction. The drain hose relay member 44 has, for example, a through hole through which the wash water after use flows. The tip of the second portion of the main drain hose 43a is connected to the entrance of the through hole, and the base end of the second portion of the main drain hose 43a is connected to the boss of the drain hose winding reel 41. The base end of the auxiliary drain hose 43b is connected to the exit of the through hole of the drain hose relay member 44. The tip of the auxiliary drain hose 43b is connected to the wash water outlet 12 of the dishwasher 10. 【0049】 Figure 5 shows an example of a connection mechanism between the drain hose winding reel 41 and the drain piping 46 shown in Figure 1. Referring to Figure 5, the central and rear end portions 41a of the boss of the drain hose winding reel 41 are formed to be hollow, and a hose insertion hole 41c is provided in the central portion of the boss, penetrating the hollow portion. The base end of the second portion of the main drain hose section 43a wound on the drain hose winding reel 41 is inserted through this hose insertion hole 41c in a watertight manner using a sealant or the like. On the other hand, the rear end portion 41a and front end portion 41b of the boss of the drain hose winding reel 41 are rotatably supported by a pair of support columns 42 via a pair of bearings 49. A mechanical seal mechanism is configured at the tip of the rear end portion 41a of the boss of the drain hose winding reel 41. Specifically, an annular groove 47 is formed at the tip of the rear end portion 41a of the boss of the drain hose winding reel 41. On the other hand, the tip of the drain pipe 46 is formed in a flange shape that fits onto the tip of the rear end 41a of the boss of the drain hose winding reel 41 so as to cover the annular groove 47. An annular sealing member 48 is placed in the annular groove 47, and the flange-shaped tip of the drain pipe 46 is fitted onto the tip of the rear end 41a of the boss of the drain hose winding reel 41. As a result, used wash water is discharged watertightly from the second portion of the hose of the main drain hose section 43a wound on the rotating drain hose winding reel 41 into the drain pipe 46. The base end of the drain pipe 46 constitutes a used wash water outlet end that can be connected to the sewer outlet 24, and the tip of the secondary drain hose section 43b constitutes a used wash water inlet end that can be connected to the wash water outlet 12 of the dishwasher 10. 【0050】 Referring to Figure 2, when the fourth motor M4 rotates in the reverse direction, the drain hose winding reel 41 unwinds the second portion of the hose from the main drain hose section 43a, and when the fourth motor M4 rotates in the forward direction, the drain hose winding reel 41 winds up the second portion of the hose from the main drain hose section 43a. 【0051】 The second part of the main drain hose section 43a is made of, for example, a pressure-resistant hose. A regular hose can also be used, but a pressure-resistant hose is preferable because its cross-section is less likely to be crushed when wound onto the drain hose winding reel 41. The fourth motor M4 is made of, for example, a stepping motor or a servo motor, because it allows for precise control of the rotation angle. 【0052】 <Power supply mechanism 50> The power supply mechanism 50 is for supplying power for operation from the power distribution terminal 25 to the dishwasher 10. The power supply mechanism 50 includes a wire winding reel 51, a support pole 52, a wire section 53, and a wire section relay member 54. The wire section 53 includes a main wire section 53a and a secondary wire section 53b. The power supply mechanism 50 will be described in detail below. 【0053】 Referring to Figures 1 and 2, a third base plate 55 is provided on the lower part of the inner surface of the right side wall 22b of the element mounting member 22 of the housing chamber 20 so as to protrude to the left. A pair of support columns 52 are erected on the upper surface of this third base plate 55 at intervals in the front-rear direction. A wire winding reel 51 is rotatably mounted on this pair of support columns 52. Therefore, the wire winding reel 51 is provided so as to have a flange that extends in the left-right direction. The front end 51b of the boss of the wire winding reel 51 (see Figure 6) is connected to the main shaft of the fifth motor M5 provided on the third base plate 55. The main wire section 53a consists of a first portion, from the power distribution terminal 25 to the rear end 51a of the boss of the wire winding reel 51, which is composed of a power supply line 56, and a second portion, from the boss of the wire winding reel 51 (see Figure 6) to the receiving end of the wire section relay member 54, which is composed of a wire. The auxiliary wiring section 53b here is composed of electric wires. 【0054】 The wire relay member 54 is provided at the right end of the fixed base 5, in a position where the second portion of the main wire section 53a extends in the left-right direction. The wire relay member 54 has, for example, a conductor through which the supplied current flows, and the tip of the second portion of the main wire section 53a is connected to the power receiving end of the conductor, and the base end of the second portion of the main wire section 53a is connected to the boss of the wire winding reel 51. The base end of the auxiliary wire section 53b is connected to the power supply end of the conductor of the wire relay member 54. The tip of the auxiliary wire section 53b is connected to the power receiving terminal 13 of the dishwasher 10. 【0055】 Figure 6 shows an example of the connection mechanism between the wire winding reel 51 and the power supply line 56 shown in Figure 1. Referring to Figure 6, the central and rear end portions 51a of the boss of the wire winding reel 51 are formed to be hollow, and the smaller diameter portion of the conductor 501, which has a large diameter portion and a small diameter portion, is fitted into the hollow portion 51c. This fitting is done, for example, by press-fitting or screwing. In addition, a wire insertion hole 51d is provided in the central portion of the boss of the wire winding reel 51, opening into the hollow portion 51c. The base end of the second portion of the main wire section 53a wound on the wire winding reel 51 is inserted into this wire insertion hole 51d, and the core wire of the base end is connected to the conductor 501. This connection is made, for example, by forming a wire insertion hole 51d that is elongated in the circumferential direction, and then inserting a soldering iron into the gap between the wire insertion hole 51d and the base end of the wire of the second portion of the main wire section and soldering. On the other hand, the rear end 51a and front end 51b of the boss of the wire winding reel 51 are rotatably supported by a pair of support columns 52 via a pair of bearings 505. A brush conductive mechanism is configured in the large-diameter portion of the conductor 501 fitted into the rear end 51a of the boss of the wire winding reel 51. Specifically, a plate-shaped spring receiving portion 52a that protrudes rearward is provided at the upper end of the rear support column 52, and a vertical through hole is formed in this spring receiving portion 52a. A brush 502 and a compression spring 503 are arranged between the portion of the spring receiving portion 52a with the through hole and the large-diameter portion of the conductor 501. The brush 502 is pressed against the large-diameter portion of the conductor 501 by a compression spring 503. Meanwhile, the tip of the power supply line 56 is inserted through the through hole, and this tip is connected to the upper end of a conductive wire 504 that extends to the center of the compression spring 503. The lower end of the conductive wire 504 is connected to the upper end of the brush 502. In this way, power to operate the dishwasher 10 is supplied from the power supply line 56 to the second portion of the main power line section 53a wound on the rotating power line winding reel 51. The base end of the power supply line 56 constitutes a first connection terminal that can be connected to the power distribution terminal 25, and the tip of the auxiliary power line section 53b constitutes a second connection terminal that can be connected to the power receiving terminal 13 of the dishwasher 10. 【0056】 Referring to Figure 2, when the fifth motor M5 rotates forward, the wire winding reel 51 unwinds the second portion of the wire from the main wire section 53a, and when the fifth motor M5 rotates backward, the wire winding reel 51 winds up the second portion of the wire from the main wire section 53a. 【0057】 The power supply line 56 and the wires are, for example, insulated wires, electrical cables, etc. The fifth motor M5 is, for example, a servo motor, because it allows for precise control of the rotation angle. 【0058】 <Dishwasher 10> The dishwasher 10 is not particularly limited as long as it has the functions of a typical dishwasher. Figure 7 shows an example of a commercially available dishwasher 10. This dishwasher 10 has an upward-opening door 14. Inside, it has a lower rack 15 and an upper rack 16 for arranging dishes. In the dishwasher lifting system 100 according to this embodiment 1, the fixing device 6 is arranged according to the specifications of the commercially available dishwasher 10. In addition, a secondary water supply hose section 33b, a secondary drain hose section 43b, and a secondary electrical wiring section 53b are created. This makes it possible to use various commercially available dishwashers 10. 【0059】 Alternatively, a dedicated dishwasher 10 may be used. In this case, the water supply hose connecting member 34, the drain hose connecting member 44, and the electrical wire connecting member 54, as well as the auxiliary water supply hose 33b, auxiliary drain hose 43b, and auxiliary electrical wire 53b, are omitted. 【0060】 <Control System> Figure 8 is a block diagram showing an example of the configuration of the control system for the dishwasher lifting system 100 shown in Figure 1. 【0061】 Referring to Figure 8, the control system of the dishwasher lifting system 100 comprises a controller 8, a remote control 9, and an obstacle sensor S. 【0062】 The controller 8 includes a control unit 81 and a communication unit 82. The control unit 81 is composed of an arithmetic unit including a processor and memory. Examples of such an arithmetic unit include a microcontroller and an FPGA. The control unit 81 stores a predetermined control program in its memory, and the processor reads and executes the control program from the memory to perform the control described below. The communication unit 82 enables communication between the control unit 81 and the remote control 9. The controller 8 is placed in a suitable location in the housing room 20. 【0063】 The obstacle sensor S detects whether or not an obstacle is present in the opening 71 of the floor 70. Examples of obstacle sensors S include ultrasonic sensors, infrared sensors, and laser light sensors. 【0064】 The hardware configuration of the remote control 9 is well known and is configured in the same way as the controller 8 described above. Therefore, a description of the hardware configuration of the remote control 9 will be omitted. The remote control 9 commands the on / off of the dishwasher lifting system 100 and the raising / lowering of the lifting device LFD. The operation section of the remote control 9 is provided with an on operation section 91 and an off operation section 92 for instructing the on and off of the dishwasher lifting system 100, respectively, and an upward operation section 93 and a downward operation section 94 for instructing the upward and downward raising of the lifting device LFD, respectively. The on operation section 91, the off operation section 92, the upward operation section 93, and the downward operation section 94 light up when operated and turn off when the corresponding operation is completed. These operations are controlled by the control unit 81. 【0065】 The control functions of controller 8 will be explained in detail below. 【0066】 {On / Off control of dishwasher lifting system 100} When the ON operation unit 91 of the remote control 9 is operated, the control unit 81 turns on a power switch (not shown) to turn on the power to the first to fifth motors M1 to M5 and also turns on the power supply to the power distribution terminal 25. When the OFF operation unit 92 of the remote control 9 is operated, the control unit 81 turns off the power switch to turn off the power to the first to fifth motors M1 to M5 and also turns off the power supply to the power distribution terminal 25. The controller 8 is turned on by turning on the overall power switch (not shown) of the dishwasher lifting system 100 and turned off by turning off said power switch. 【0067】 {Lifting control of the LFD lifting device} Control of the first motor M1 and the second motor M2 The lifting and lowering of the LFD is performed by controlling the rotation of the first motor M1 and the second motor M2. Here, since the first motor M1 and the second motor M2 are composed of stepping motors or servo motors, the upper and lower positions of the fixed base 5 of the LFD are specifically set by the rotation angles of the first motor M1 and the second motor M2. Specifically, as shown in Figure 1, the rotation angles of the first motor M1 and the second motor M2 when the left end of the third movable body 5a is located at the left end of the second sliding groove GR2 and the right end of the fourth movable body 5b is located at the right end of the third sliding groove GR3 are set as the lower position rotation angles corresponding to the lower position of the fixed base 5 of the LFD. Furthermore, as shown in Figure 10, the rotation angles of the first motor M1 and the second motor M2 are set as the upward position rotation angles corresponding to the upward position of the fixed base 5 of the lifting device LFD when the right end of the third movable body 5a is located at the right end of the second sliding groove GR2 and the left end of the fourth movable body 5b is located at the left end of the third sliding groove GR3. 【0068】 When the lifting operation unit 93 of the remote control 9 is operated, the control unit 81 controls the rotation angles of the first motor M1 and the second motor M2 to be set to the upward position rotation angle. When the lowering operation unit 94 of the remote control 9 is operated, the control unit 81 controls the rotation angles of the first motor M1 and the second motor M2 to be set to the downward position rotation angle. In addition, when performing these controls, the control unit 81 controls the rotation speed of the first motor M1 and the second motor M2 to a predetermined upward rotation speed or a predetermined downward rotation speed. The predetermined upward rotation speed and predetermined downward rotation speed are set so that the fixed base 5 moves up and down slowly. The upward and downward speed of the fixed base 5 is, for example, about 5 cm to 20 cm per second. 【0069】 Control of the 3rd to 5th motors M3 to M5 When the lifting operation unit 93 of the remote control 9 is operated, the control unit 81 controls the rotation of the third to fifth motors M3 to M5 so that the second part of the hose of the main water supply hose section 33a, the second part of the hose of the main drainage hose section 43a, and the second part of the electric wire section 53a are extended and extended, respectively. At that time, the control unit 81 controls the rotation speed of the third to fifth motors M3 to M5 so that the extension speed of the second part of the hose of the main water supply hose section 33a, the second part of the hose of the main drainage hose section 43a, and the second part of the electric wire section 53a follows the lifting speed of the lifting device LFD, respectively. Specifically, the control unit 81 controls the rotational speeds of the third to fifth motors M3 to M5 based on predetermined upward rotational speeds of the first motor M1 and the second motor M2, and the rate at which the winding diameter of the water supply hose winding reel 31, the drain hose winding reel 41, and the electric wire winding reel 51 decreases. 【0070】 When the lowering operation unit 94 of the remote control 9 is operated, the control unit 81 controls the rotation of the third to fifth motors M3 to M5 so that the hose of the second part of the main water supply hose section 33a, the hose of the second part of the main drainage hose section 43a, and the wire of the second part of the main power line section 53a are wound up and contracted, respectively. At that time, the control unit 81 controls the rotation speed of the third to fifth motors M3 to M5 so that the winding speed of the hose of the second part of the main water supply hose section 33a, the hose of the second part of the main drainage hose section 43a, and the wire of the second part of the main power line section 53a follows the lowering speed of the lifting device LFD, respectively. Specifically, the control unit 81 controls the rotational speeds of the third to fifth motors M3 to M5 based on predetermined downward rotational speeds of the first motor M1 and the second motor M2, and the rate at which the winding diameter of the water supply hose winding reel 31, the drain hose winding reel 41, and the electric wire winding reel 51 increases. 【0071】 Safety control The obstacle sensor S is installed in a position where its detection range can be set to include the opening 71 in the floor 70. In this case, the obstacle sensor S is installed in the center of the top surface of the dishwasher 10. 【0072】 The detection range of the obstacle sensor S is set, for example, by adjusting the sensitivity so that the detection limit of the obstacle sensor S is the upper surface of the exposed space 7. Since the obstacle sensor S has a radial detection range of a predetermined solid angle, it is preferable to place it in a position close to the opening 71 in the floor 70. 【0073】 When the obstacle sensor S detects an obstacle, the control unit 81 controls the first and second motors M1 and M2 to not rotate. This prevents, for example, the dishwasher 10 (and fixed base 5) of the lifting device LFD from rising and lifting the lid member 72 if the lifting operation unit 93 of the remote control 9 is operated by mistake or accident when the opening 71 in the floor 70 is closed by the lid member 72. 【0074】 [Operation] Next, the operation of the dishwasher lifting system 100, configured as described above, will be explained. 【0075】 <Dishes being brought in> Figure 9 shows the operation of the dishwasher lifting system 100 of Figure 1, with the lid member 72 of the opening 71 in the floor 70 removed. Figure 10 shows the operation of the dishwasher lifting system 100 of Figure 1, with the fixed base 5 raised to the upper position. In Figures 9 and 10, reference numerals for elements unrelated to the operation of the lifting system 100 are omitted. 【0076】 Referring to Figure 1, first the user grasps and removes the cover member 72 of the opening 71 in the floor 70. 【0077】 Referring to Figures 8 and 9, the user then operates the ON control unit 91 of the remote control 9. The ON control unit 91 then lights up, and the dishwasher lifting system 100 is turned on. 【0078】 Next, the user operates the lifting control unit 93 on the remote control 9. The lifting control unit 93 then lights up, and the lifting device LFD of the dishwasher lifting system 100 is activated, raising the fixed base 5 to its upper position. Then, the lifting control unit 93 turns off. 【0079】 Referring to Figure 10, in this state, the second portion of the main water supply hose section 33a is extended from the water supply hose winding reel 31. Also, the second portion of the main drain hose section 43a is extended from the drain hose winding reel 41. Furthermore, the second portion of the main electrical wire section 53a is extended from the electrical wire winding reel 51. 【0080】 Referring to Figure 7, the user opens the upward-opening door 14 of the dishwasher 10, loads dishes into the lower rack 15 and the upper rack 16, and then closes the door 14 when finished. 【0081】 Referring to Figures 8 and 9, the user then operates the lowering control unit 94 of the remote control 9. The lowering control unit 94 then lights up, and the lifting device LFD of the dishwasher lifting system 100 is activated, causing the fixed base 5 to be lowered to its lower position. The lowering control unit 94 then turns off. 【0082】 Referring to Figure 9, in this state, the second portion of the main water supply hose section 33a is wound onto the water supply hose winding reel 31 and is in a contracted state. Also, the second portion of the main drain hose section 43a is wound onto the drain hose winding reel 41 and is in a contracted state. Furthermore, the second portion of the main electrical wire section 53a is wound onto the electrical wire winding reel 51 and is in a contracted state. 【0083】 <Dishwashing using a dishwasher 10> If the dishwasher 10 is a smart appliance, the user operates the dishwasher 10 by using their smartphone. On the other hand, if the dishwasher 10 is not a smart appliance, the user reaches their hand into the storage chamber 20 through the opening 71 in the floor 70 and operates the ON control unit of the dishwasher 10 to start it. 【0084】 Afterward, the user closes the opening 71 in the floor 70 with the cover member 72. 【0085】 <Dish removal action> Once the dishwasher 10 has finished its washing operation, the user operates the lifting control unit 93 of the remote control 9 as described above, thereby raising the fixed base 5 of the lifting device LFD to the upper position. Next, the user removes the washed dishes from the dishwasher 10. 【0086】 <Stopping operation of the dishwasher lifting system 100> After removing the dishes, the user operates the lowering control unit 94 of the remote control 9 as described above, thereby lowering the fixed base 5 of the lifting device LFD to a lower position. 【0087】 Next, the user operates the off control unit 92 on the remote control 9. The off control unit 92 then lights up, and the dishwasher lifting system 100 turns off. The off control unit 92 then turns off. 【0088】 [Effects and Effects] The dishwasher lifting system of this embodiment 1 does not require space to install the dishwasher near the sink, and it is possible to provide a hygienic dishwasher lifting system. 【0089】 (Embodiment 2) 【0090】 [composition] Figure 11 is a cross-sectional view showing an overview of an example of the configuration of a dishwasher lifting system 200 according to Embodiment 2 of the present invention. Figure 11 shows the state in which the fixed base 5 has been raised to an upward position by the lifting device LFD. 【0091】 The dishwasher lifting system 200 according to Embodiment 2 further includes a dishwasher 10 that is low in height and has only one rack on which dishes to be washed are placed. The other configurations are the same as those of the dishwasher lifting system 100 of Embodiment 1. Therefore, a detailed description of the dishwasher lifting system 200 of Embodiment 2 will be omitted. 【0092】 According to the dishwasher lifting system of this second embodiment, the height of the dishwasher 10 is reduced, and the depth dimension of the storage chamber 20 from the floor 70 can be reduced. As a result, the dishwasher 10 can be installed even if the kitchen or sink is narrow and there is not enough space to install the dishwasher 10, or even if there is not enough depth in the basement space. 【0093】 (Embodiment 3) The dishwasher lifting system 300 according to Embodiment 3 of the present invention differs from the dishwasher lifting system 100 of Embodiment 1 in the configuration of the water supply mechanism 30, the drainage mechanism 40, and the power supply mechanism 50, while the other configurations are the same as those of the dishwasher lifting system 100 of Embodiment 1. The differences will be explained below. 【0094】 [composition] Figure 12 is a cross-sectional view showing an overview of an example of the configuration of a dishwasher lifting system 300 according to Embodiment 3 of the present invention. Referring to Figures 2 and 12, the water supply mechanism 30, drainage mechanism 40, and power supply mechanism 50 of the dishwasher lifting system 300 of this embodiment are configured as follows. 【0095】 <Water supply mechanism 30> The water supply mechanism 30 includes a pre-use wash water inlet end 311a connected to the tap water supply port 23, a pre-use wash water outlet end 311b connected to the wash water supply port 11 of the dishwasher 10, and a first automatic coupling mechanism 301 which separates the pre-use wash water inlet end 311a and the pre-use wash water outlet end 311b in a closed state and connects them in an electrically connected state as the dishwasher 10 moves up and down. The pre-use wash water inlet end 311a is composed of a first water supply pipe. The pre-use wash water outlet end 311b is composed of a second water supply pipe. The first water supply pipe (311a) and the second water supply pipe (311b) are composed of circular pipes of the same diameter. 【0096】 Figure 13 is a cross-sectional view showing an example of the configuration of the first automatic joint mechanism 301 of Figure 12. Referring to Figure 13, the first automatic joint mechanism 301 includes a first on-off valve VV1 provided on the first water supply pipe (311a), a second on-off valve VV2 provided on the second water supply pipe (311b), and a first joint J1. In the first automatic joint mechanism 301, the first water supply pipe (311a) and the second water supply pipe (311b) both extend in the vertical direction and are formed to share a central axis with each other. At the first joint J1, the upper end of the first water supply pipe (311a) is formed into a large-diameter section, and an enlarged-diameter section is formed at the upper end of the large-diameter section. The inner circumferential surface of the large-diameter section is a stepped section, and an annular groove 315 is formed radially from the outer circumferential surface of the stepped section. A first annular seal member SEAL1 is arranged in the groove 315. The second water supply pipe (311b) is fixed to the dishwasher 10 which is fixed to the base 5. When the base 5 is in a lower position, the lower end of the second water supply pipe (311b) is fitted into the large-diameter portion of the first water supply pipe (311a), and abuts against the stepped portion of the first water supply pipe (311a) via the first annular seal member SEAL 1. This allows pre-use wash water to be supplied watertightly from the first water supply pipe (311a) to the second water supply pipe (311b). On the other hand, when the base 5 is in an upper position, the lower end of the second water supply pipe (311b) is pulled out from the large-diameter portion of the first water supply pipe (311a), and the lower end of the second water supply pipe (311b) and the large-diameter portion of the first water supply pipe (311a) are separated. Furthermore, the enlarged diameter portion of the first water supply pipe (311a) is designed to suitably guide the lower end of the second water supply pipe (311b) into the larger diameter portion of the first water supply pipe (311a) when the lower end of the second water supply pipe (311b) is fitted into the larger diameter portion of the first water supply pipe (311a). 【0097】 <Drainage mechanism 40> The drainage mechanism 40 includes a used wash water inlet end 312b connected to the wash water outlet 12 of the dishwasher 10, a used wash water outlet end 312a connected to the sewer outlet 24, and a second automatic coupling mechanism 302 which separates the used wash water inlet end 312b and the used wash water outlet end 312a in a closed state and connects them in an electrically connected state as the dishwasher 10 moves up and down. The used wash water outlet end 312a is here composed of a first drain pipe. The used wash water inlet end 312b is here composed of a second water supply pipe. The first drain pipe (312a) and the second drain pipe (312b) are made of circular pipes of the same diameter. 【0098】 Figure 14 is a cross-sectional view showing an example of the configuration of the second automatic joint mechanism 302 of Figure 12. Referring to Figure 14, the second automatic joint mechanism 302 includes a third on-off valve VV3 provided in the first drain water pipe (312a), a fourth on-off valve VV4 provided in the second drain pipe (312b), and a second joint J2. In the second automatic joint mechanism 302, the first drain pipe (312a) and the second drain pipe (312b) both extend in the vertical direction and are formed to share a central axis with each other. At the second joint J2, the upper end of the first drain pipe (312a) is formed into a large-diameter section, and an enlarged-diameter section is formed at the upper end of the large-diameter section. The inner circumferential surface of the large-diameter section is stepped, and an annular groove 316 is formed radially from the outer circumferential surface of the stepped section. A second annular seal member SEAL2 is arranged in the groove 316. The second drain pipe (312b) is fixed to the dishwasher 10 which is fixed to the base 5. When the base 5 is in a lower position, the lower end of the second drain pipe (312b) is fitted into the large-diameter portion of the first drain pipe (312a), and abuts with the stepped portion of the first drain pipe (312a) via the second annular sealing member SEAL2. This allows the used wash water to be discharged watertight from the second drain pipe (312b) to the first drain pipe (312a). On the other hand, when the base 5 is in an upper position, the lower end of the second drain pipe (312b) is pulled out from the large-diameter portion of the first drain pipe (312a), and the lower end of the second drain pipe (312b) and the large-diameter portion of the first drain pipe (312a) are separated. Furthermore, the enlarged diameter portion of the first drain pipe (312a) appropriately guides the lower end of the second drain pipe (312b) into the larger diameter portion of the first drain pipe (312a) when the lower end of the second drain pipe (312b) is fitted into the larger diameter portion of the first drain pipe (312a). 【0099】 <Power supply mechanism 50> The power supply mechanism 50 includes a first connection terminal 313a connected to the power distribution terminal 25, a second connection terminal 313b connected to the power receiving terminal 13 of the dishwasher 10, and a disconnection mechanism 303 which separates the first connection terminal 313a and the second connection terminal 313b in a disconnected state and connects them in a conductive state according to the raising and lowering of the dishwasher 10. The first connection terminal 313a is made of a rigid coated flat wire. The second connection terminal 313b is made of a rigid coated round wire. 【0100】 Figure 15 shows an example of the disconnection mechanism 303 shown in Figure 12. Referring to Figure 15, in the disconnection mechanism 303, the coated flat wire (313a) and the coated round wire (313b) are both formed to extend in the vertical direction and share a central axis with each other. In the disconnection mechanism 303, a contact CNT is provided on the upper end surface of the core wire at the upper end of the coated flat wire (313a). This contact CNT is formed in a cantilever spring shape with an upwardly curved contact portion. On the other hand, the core wire at the lower end of the coated round wire (313b) is formed in a hemispherical shape. The coated round wire (313b) is fixed to a dishwasher 10 which is fixed to a fixed base 5, and when the fixed base 5 is in a lower position, the hemispherical core wire at the lower end of the coated round wire (313b) contacts the contact CNT of the coated flat wire (313a). This allows the power for operating the dishwasher 10 to be transmitted from the insulated flat wire (313a) to the insulated round wire (313b). On the other hand, when the fixed base 5 is in an upper position, the lower end of the insulated round wire (313b) is separated from the contact of the insulated flat wire (313a), and the lower end of the insulated round wire (313b) and the contact of the insulated flat wire (313a) are separated. 【0101】 <Control System> Figure 16 is a block diagram showing an example of the configuration of the control system of the dishwasher lifting system 300 shown in Figure 12. Referring to Figure 16, in this embodiment 3, the control unit 81 further controls the operation of the first to fourth on-off valves VV1 to VV4. The other configurations are the same as in embodiment 1, and their description is omitted. 【0102】 [Operation] Referring to Figures 12 and 16, in this embodiment 3, when the lifting operation unit 93 of the remote control 9 is operated, the control unit 81 controls the lifting operation unit 93 to light up, the lifting device LFD of the dishwasher lifting system 100 is activated, the fixed base 5 is raised to the upper position by the lifting device LFD, and the lifting operation unit 93 turns off. At this time, the control unit 81 further closes the first to fourth on-off valves VV1 to VV4 when the lifting operation unit 93 is operated. 【0103】 Referring to Figures 13 to 15, in this state, the lower end of the second water supply pipe (311b) is pulled out from the large-diameter section of the first water supply pipe (311a), separating the lower end of the second water supply pipe (311b) from the large-diameter section of the first water supply pipe (311a). The lower end of the second drain pipe (312b) is pulled out from the large-diameter section of the first drain pipe (312a), separating the lower end of the second drain pipe (312b) from the large-diameter section of the first drain pipe (312a). Furthermore, the lower end of the coated round wire (313b) is separated from the contact of the coated flat wire (313a), separating the lower end of the coated round wire (313b) from the contact of the coated flat wire (313a). In addition, the first to fourth on-off valves substantially prevent leakage of pre-use and post-use cleaning water. Furthermore, the pre-use and post-use wash water present at the first joint J1 of the first automatic joint mechanism 301 and the second joint J2 of the second joint mechanism 302 flow down into the storage chamber 20, and are discharged into the sewer pipe through a drain outlet (not shown) provided in the storage chamber 20. This allows the dishwasher 10 to be positioned in an elevated position, enabling dishes to be conveniently loaded into or unloaded from the dishwasher 10. 【0104】 Referring to Figures 12 and 16, in this embodiment 3, when the lowering operation unit 94 of the remote control 9 is operated, the control unit 81 controls the lowering operation unit 94 to light up, the lifting device LFD of the dishwasher lifting system 100 is activated, the fixed base 5 is lowered to the lower position by the lifting device LFD, and the lowering operation unit 94 turns off. At this time, the control unit 81 further opens the first to fourth on-off valves VV1 to VV4 when the fixed base 5 is in the lower position. 【0105】 Referring to Figures 13 to 15, in this state, the lower end of the second water supply pipe (311b) is fitted into the large diameter portion of the first water supply pipe (311a), and the lower end of the second water supply pipe (311b) and the large diameter portion of the first water supply pipe (311a) are connected. The lower end of the second drain pipe (312b) is fitted into the large diameter portion of the first drain pipe (312a), and the lower end of the second drain pipe (312b) and the large diameter portion of the first drain pipe (312a) are connected. In addition, the lower end of the insulated round wire (313b) is in contact with the contact of the insulated flat wire (313a), and the lower end of the insulated round wire (313b) and the contact of the insulated flat wire (313a) are connected. Furthermore, the first to fourth on-off valves VV1 to VV4 are in a conductive (open) state. As a result, the dishwasher 10 is placed in an environment in which it can operate. 【0106】 [Effects and Effects] According to this embodiment 3, the dishwasher 10 can be placed in an elevated position in a neat and tidy manner. 【0107】 (Other embodiments) In Embodiment 1, the dishwasher 10 may be operated with the fixed base 5 in the upper position. 【0108】 In Embodiment 3, instead of the first and second on-off valves VV1 and VV2 of the first joint J1, a mechanism is employed to mechanically open and close the first water supply pipe (311a) and the second water supply pipe (311b) in accordance with the fitting and unfitting of the upper end of the first water supply pipe (311a) and the lower end of the second water supply pipe (311b). Furthermore, instead of the third and fourth on-off valves VV3 and VV4 of the second joint J2, a mechanism is employed to mechanically open and close the first drainage pipe (312a) and the second drainage pipe (312b) in accordance with the fitting and unfitting of the upper end of the first drainage pipe (312a) and the lower end of the second drainage pipe (312b). 【0109】 In any of embodiments 1 to 3, instead of the obstacle sensor S, a sensor that detects the engagement between the stepped portion 71a of the opening 71 of the floor 70 and the stepped portion 72a of the lid member 72 may be provided as a sensor to ensure safety. Examples of such sensors include contact sensors. 【0110】 In any of embodiments 1 to 3, the remote control 9 may be provided with a "stop operation unit," and the control unit 81 may be configured to stop the operation of the lifting device LFD when the stop operation unit is operated. This allows the lifting device LFD to be stopped in the event of an unexpected problem. 【0111】 From the above description, many improvements and other embodiments will be apparent to those skilled in the art. Therefore, the above description should be interpreted as illustrative only. [Industrial applicability] 【0112】 The dishwasher lifting system of the present invention is useful when the kitchen or sink area of ​​a residence is narrow and there is no space to install a dishwasher. [Explanation of Symbols] 【0113】 1 base 2,3 Ball screw mechanism 4 Link Mechanism 5 Fixed base 6 Fixtures 7 Exposure space 8. Controller 9 Remote control 10 Dishwasher 20 Confinement Rooms 30 Water supply mechanism 40 Drainage mechanism 50 Power supply mechanism 70 floorboards 71 Aperture 71a Stepped section 72 Lid member 81 Control Unit 82 Communications Department 91 ON control unit 92 Off control section 93 Lifting operation section 94 Lowering operation part GR1 First sliding groove GR2 Second sliding groove GR3 Third sliding groove LFD lifting device M1-M5 First to fifth motors S Obstacle Sensor VV1~VV4 First to fourth on / off valves

Claims

[Claim 1] A dishwasher lifting system for raising and lowering a dishwasher between a housing chamber located beneath the floor and an exposed space above the housing chamber on the floor, A mounting base for detachably fixing the aforementioned dishwasher in a horizontal position, A lifting device is provided inside the aforementioned storage chamber, which raises and lowers the fixed base on which the dishwasher is fixed between a lower position inside the storage chamber and an upper position in the exposed space. A water supply mechanism that supplies pre-wash water to the dishwasher located at the lower position, A drainage mechanism for discharging used washing water from the dishwasher located at the lower position, The dishwasher, located at the lower position, is equipped with a power supply mechanism that supplies power for operation to the dishwasher, The aforementioned storage chamber comprises an opening in the floor through which the dishwasher, fixed to the fixed base of the lifting device, can pass vertically; a lid member for opening and closing the opening; a water supply port connected to a water supply pipe; a sewage outlet connected to a sewage pipe; and a power distribution terminal connected to a power distribution line. The water supply mechanism includes a pre-use wash water inlet end connectable to the tap water supply port, a pre-use wash water outlet end connectable to the dishwasher's wash water supply port, and a pre-use wash water passage connecting the pre-use wash water inlet end and the pre-use wash water outlet end, and the pre-use wash water passage includes a first automatic coupling mechanism such that when the dishwasher is in the upper position, the pre-use wash water inlet end and the pre-use wash water outlet end are separated from each other in a blocked state, and when the dishwasher is in the lower position, the pre-use wash water inlet end and the pre-use wash water outlet end are connected to each other in an electrically connected state. The drainage mechanism includes a used wash water inlet end connectable to the wash water outlet of the dishwasher, a used wash water outlet end connectable to the sewer outlet, and a used wash water passage connecting the used wash water inlet end and the used wash water outlet end, and the used wash water passage includes a second automatic coupling mechanism such that when the dishwasher is in the upper position the used wash water inlet end and the used wash water outlet end are separated from each other in a blocked state, and when the dishwasher is in the lower position the used wash water inlet end and the used wash water outlet end are connected to each other in an electrically connected state, and The power supply mechanism includes a first connection terminal connectable to the power distribution terminal, a second connection terminal connectable to the power receiving terminal of the dishwasher, and a conductor connecting the first connection terminal and the second connection terminal, and the conductor includes a disconnection mechanism that separates the first connection terminal and the second connection terminal in a disconnected state when the dishwasher is in the upper position, and connects the first connection terminal and the second connection terminal in a conductive state when the dishwasher is in the lower position, a dishwasher lifting system. [Claim 2] The dishwasher lifting system according to claim 1, further comprising a safety device configured to prevent the lifting device from operating unless it detects that the opening of the storage chamber is open. [Claim 3] The aforementioned dishwasher is further equipped, The dishwasher lifting system according to claim 1 or 2, wherein the dishwasher has only one rack on which dishes to be washed are placed.

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