Sheet unfolding device

Abstract

To provide a sheet deployment device that allows a user to replace sheets without direct contact and also enables capturing airborne droplets and microbes floating in the air.SOLUTION: A sheet deployment device 1 comprises: a Western-style toilet bowl 10; a weight sensor 21 that detects a user facing the toilet bowl 10; a conveyance part 40 that moves a sheet 100 between a storage position P1 in a storage space 190 inside a side wall of a toilet room 200 in which the toilet bowl 10 is installed, and a deployment position P2 in an inner space 191 of the toilet room 200, surrounding the toilet bowl 10; and a controller 16. The controller 16, on the basis of an output signal from the weight sensor 21, causes the conveyance part 40 to move the sheet 100 from the storage position P1 to the deployment position P2, and subsequently move it upward.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a seat deployment device that deploys a seat inside a toilet room. [Background technology]

[0002] It has been known that bacteria in toilets are dispersed outside the toilet bowl by water droplets scattered during excretion and flushing. To combat bacteria that have spread outside the toilet bowl, a replaceable toilet mat has been proposed, which is laid on the floor to absorb water droplets and suppress the proliferation of bacteria (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-239854 Summary of the Invention [Problem to be solved by the invention]

[0004] Toilet mats (sheets) are laid on the floor of rooms where Western-style toilets are installed and left for long periods of time. To prevent the growth of bacteria in the room, the mats need to be replaced at predetermined intervals. Replacing the mat requires the user to hold the mat. Therefore, it is hygienic and desirable if the user can replace the mat or sheet without touching it. In addition, it would be even more hygienic if it could capture droplets and bacteria floating in the air.

[0005] The present invention has been made in consideration of the above problems, and aims to provide a sheet spreading device that allows a user to replace sheets without touching them and that can capture droplets and bacteria floating in the air. [Means for solving the problem]

[0006] (1) A seat unfolding device according to the present invention includes a Western-style toilet, a sensor for detecting a user facing the Western-style toilet, a conveying unit for moving a seat between a first position in a storage space inside a side wall of a room in which the Western-style toilet is installed and a second position around the Western-style toilet in the interior space of the room, and a controller. Based on an output signal from the sensor, the controller causes the conveying unit to move the seat from the first position to the second position, and then moves the seat upward.

[0007] The sheet is moved from the first position to the second position. Then, by moving upward from the second position, the sheet captures droplets and bacteria floating in the air, helping to maintain a clean room.

[0008] (2) The sensor may be a weight sensor that outputs a first signal indicating a first weight and a second signal indicating a second weight that is heavier than the first weight, and the controller may, after receiving the second signal, cause the conveying section to move the sheet from the first position to the second position based on the receipt of the first signal, and then move the sheet upward.

[0009] The sheet is deployed after the user leaves the room, so droplets and bacteria can be efficiently collected.

[0010] (3) The seat unfolding device may further include an underfloor space that connects to the underfloor from a floor surface located below the second position. The conveying unit may be capable of sending the seat into the underfloor space, and the controller may cause the conveying unit to lower the seat, which has moved upward from the second position, to the second position, and then send the seat into the underfloor space.

[0011] It is hygienic because the sheet that captures droplets and bacteria can be collected in the space under the floor without touching it.

[0012] (4) The conveying section may be plural, and a pair of the conveying sections may be positioned on either side of the Western-style toilet bowl, and the pair of conveying sections may be lined up along the side wall.

[0013] It can capture droplets and bacteria over a wide area indoors.

[0014] (5) The conveying unit may include a frame capable of holding the sheet and movable between the first position and the second position, a lifting unit that supports the frame and moves it up and down from the second position, a feeding unit that feeds the sheet placed in the storage space to the frame at the first position, and a moving unit that moves the frame between the first position and the second position.

[0015] The frame holding the sheet is advanced from the first position to the second position, and then the lifting unit moves the sheet up and down from the second position. The sheet moving up and down can effectively capture droplets and bacteria.

[0016] (6) The frame includes a base that is detachable from the moving section and can be supported by the lifting section, and a rod-shaped seat holding section that is connected to the base and positioned in a pair along the side wall, and is rotatable between a state extending horizontally and a state extending upward relative to the base, and is capable of holding the seat. The controller may use the lifting section to move the frame upward from the second position, and then lower it to the second position, and when the frame lowers to the second position, rotate the seat holding section relative to the base from the state extending horizontally to a state extending upward, and release the seat from its hold at the second position.

[0017] By rotating the seat holder relative to the base and pointing it upward, contact between the seat and the toilet bowl can be avoided when the toilet is lowered. In the second position, the seat holder releases the seat when the seat holder is facing upward, allowing the seat to be easily sent into the space under the floor using gravity.

[0018] (7) The seat holding portion has an intermediate portion having one end connected to the base portion, and a tip portion having one end connected to the other end of the intermediate portion and rotatable between a state extending horizontally relative to the intermediate portion and a state extending upward, and the controller may rotate the tip portion toward a state extending upward relative to the intermediate portion when the frame moves from the first position to the second position, and may rotate the tip portion toward a state extending horizontally relative to the intermediate portion at a position above the height of the Western-style toilet when the frame moves upward from the second position.

[0019] By rotating the tip upward, the tip of the sheet holder is prevented from coming into contact with the toilet bowl as it moves from the first position to the second position. By orienting the tip horizontally at a position above the height of the toilet bowl, the area of the sheet facing vertically increases. This allows for a wider droplet and bacteria capture area while taking into account indoor conditions.

[0020] (8) The moving unit may include a detachable attachment unit that is detachable from the base unit, and a sub-moving unit that can move the detachable attachment unit in the horizontal direction, and the controller may move the frame between the first position and the second position by moving the detachable attachment unit using the sub-moving unit, and may attach and detach the base unit at the second position.

[0021] The seat holding portion can be easily switched between being deployed and being stored. [Effects of the Invention]

[0022] According to the present invention, the user can replace the sheet without touching it, and it is possible to capture droplets and bacteria floating in the air. [Brief explanation of the drawings]

[0023] [Figure 1] FIG. 1 is a schematic diagram showing an internal space 191 in which a Western-style toilet 10 is installed, a storage space 190, and a lower pit 50. [Figure 2] FIG. 2 is a side view showing the inner space 191 in which the Western-style toilet 10 is installed and the lower pit 50. [Figure 3] FIG. 3 is a schematic side view showing the conveying section 40. As shown in FIG. [Figure 4] FIG. 4 is a perspective view showing the frame 41. As shown in FIG. [Figure 5] FIG. 5 is a plan view showing how the sheet 100 is supplied to the frame 41. As shown in FIG. [Figure 6] FIG. 6 is a plan view showing the frame 41 holding the sheet 100. As shown in FIG. [Figure 7] FIG. 7 is a perspective view showing the lifting unit 42. As shown in FIG. [Figure 8] FIG. 8 is a perspective view showing the pulley 421 and the endless belt 422 of the lifting unit 42. As shown in FIG. [Figure 9] FIG. 9 is a side view showing the frame 41 advancing into the internal space 191 of the toilet room 200. As shown in FIG. [Figure 10] FIG. 10 is a side view showing the frame 41 rotated at the tip 414. [Figure 11] FIG. 11 is a plan view showing how the frame 41 is supported by the lifting section 42. As shown in FIG. [Figure 12] FIG. 12 is a side view showing the frame 41 with the distal end 414 extended. [Figure 13] FIG. 13 is a schematic diagram showing the toilet room 200 in which the frame 41 has been raised to the midway position P7. [Figure 14] FIG. 14 is a side view showing the frame 41 descending from the upper end position P3. [Figure 15] FIG. 15 is a side view showing the frame 41 that feeds the sheet 100 into the lower pit 50. As shown in FIG. [Figure 16] FIG. 16 is a block diagram showing the configuration of the controller 16. [Figure 17] FIG. 17 is a flowchart showing the flow of the operation of the sheet spreading device 1. DETAILED DESCRIPTION OF THE INVENTION

[0024] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. Note that the embodiment described below is merely an example of how the present invention is realized, and it goes without saying that the embodiment can be modified as appropriate without departing from the spirit and scope of the present invention.

[0025] In the following description, the direction from the start point of an arrow to the end point is referred to as a direction, and the movement on the line connecting the start point and end point of an arrow is referred to as a direction. The directions related to the seat unfolding device 1 are given as an up-down direction 7, a front-to-back direction 8, and a left-to-right direction 9. The front-to-back direction 8 and the left-to-right direction 9 are both lateral directions perpendicular to the up-to-down direction 7 and perpendicular to each other. The front-to-back direction 8 is the direction facing the front of a Western-style toilet 10, which will be described in detail later. The left-to-right direction 9 is the direction facing the side of the Western-style toilet 10, which will be described in detail later.

[0026] [Outline of Sheet Deployment Device 1] As shown in Figure 1, the sheet spreading device 1 is located in a toilet room 200 (an example of a room) in which a Western-style toilet 10 is installed. The sheet spreading device 1 uses a sheet 100 that spreads around the Western-style toilet 10 to capture droplets and bacteria floating in the toilet room 200, thereby maintaining hygiene within the toilet room 200. Note that in Figure 1, the left wall 61 and the right wall 62 are omitted in order to show the interior of the storage space 190.

[0027] [Sheet 100 Configuration] The sheet 100 is made of, for example, a membrane filter, nonwoven fabric, or paper. The sheet 100 has a rectangular outer shape in a plan view. A plurality of sheets 100 are stacked in the up-down direction 7 and placed on a sheet tray 110 in a space (hereinafter also referred to as a storage space 190) inside a left wall 61 and a right wall 62 (an example of a side wall; see FIGS. 13 and 14 ) of a toilet room 200. The storage space 190 may be the internal space of the left wall 61 and the right wall 62, or may be a space separated from the toilet room 200 by the left wall 61 and the right wall 62. The sheet 100 is positioned so that each side extends in the front-to-back direction 8 or the left-to-right direction 9. The sheet 100 is unfolded from the storage space 190 into the internal space 191 of the toilet room 200 by a sheet unfolding device 1. The unfolded sheet 100, for example, captures droplets and bacteria that come into contact with the upper surface.

[0028] [Configuration of sheet unfolding device 1] After the user leaves the toilet room 200, the sheet unfolding device 1 unfolds the sheet 100 around the Western-style toilet 10 in the interior space 191 of the toilet room 200. The sheet unfolding device 1 moves the unfolded sheet 100 further upward in the interior space 191 of the toilet room 200, thereby capturing droplets and bacteria floating in the interior space 191 of the toilet room 200. As shown in FIGS. 1 and 2 , the sheet unfolding device 1 includes a Western-style toilet 10, an opening door 20, a weight sensor 21, a conveying unit 40, a lower pit 50 (an example of an underfloor space), and a controller 16.

[0029] [Western-style toilet 10] As shown in Figures 1 and 2, the Western-style toilet 10 is located in the center of the toilet room 200. The Western-style toilet 10 has a general configuration and includes, for example, a toilet body 101, a toilet seat 102, and a lid 103. The front of the Western-style toilet 10 is directly opposite the Western-style toilet 10. A user who enters the toilet room 200 will stand directly opposite the Western-style toilet 10. A front wall 63 and a rear wall 64 of the toilet room 200 are located in the front-to-back direction 8 of the Western-style toilet 10 (see Figure 2). A left wall 61 and a right wall 62 of the toilet room 200 are located in the left-to-right direction 9 of the Western-style toilet 10. Although not shown in the figures, an entrance is opened in the front wall 63, and the entrance is opened and closed by fittings.

[0030] [Opening door 20] As shown in Figures 2 and 3, the opening door 20 is a door that opens and closes a side wall opening 210, which is an opening that connects the storage space 190 located inside the left wall 61 and the right wall 62, respectively, to the internal space 191 of the toilet room 200. The opening door 20 is located at the bottom of the left wall 61 and the right wall 62 of the toilet room 200. The opening door 20 is located, for example, at a position lower than the toilet seat 102 of the Western-style toilet 10, and at a height near the floor (floor surface 46) of the toilet room 200. The opening door 20 is a plate body whose outline is rectangular in a plan view. The opening door 20 is located with its main surface facing the left-right direction 9. The opening door 20 is movable in the up-down direction 7. A driving force is transmitted to the opening door 20 from a motor 31 (see Figure 16). The opening door 20 moves up and down between a position S1 (see FIG. 3) where it closes the side wall opening 210 and a position S2 (see FIG. 10) where it opens the side wall opening 210 by the driving force transmitted from the motor 31. In this embodiment, the opening door 20 is located closer to the storage space 190 than the side wall opening 210, as shown in FIG. 3.

[0031] [Weight Sensor 21] As shown in Figure 1, the weight sensor 21 is located on the floor surface 46 of the toilet room 200 and directly faces the Western-style toilet 10. The weight sensor 21 detects the weight applied to the floor directly facing the Western-style toilet 10 and outputs a signal according to the weight to the controller 16.

[0032] Weight sensor 21 outputs a first signal when it detects 0 kg or more and less than 3 kg (an example of a first weight). Weight sensor 21 outputs a third signal when it detects 3 kg or more and less than 10 kg. Weight sensor 21 outputs a second signal when it detects 10 kg or more (an example of a second weight).

[0033] [Transport unit 40] 1 to 15, the conveying unit 40 conveys the seat 100 between a storage space 190 inside the left wall 61 and the right wall 62 and an internal space 191 of the toilet room 200. The conveying unit 40 is capable of moving the seat 100 between a storage position P1 (an example of a first position, see FIG. 3) in the storage space 190 inside the side wall of the toilet room 200, an unfolded position P2 (an example of a second position, see FIG. 10) in the internal space 191 of the toilet room 200 and to the side of the Western-style toilet 10, and an upper end position P3 (see FIG. 13) above the unfolded position P2 and at the upper end in the movement direction of the seat 100. As shown in FIGS. 3 to 5, the conveying unit 40 includes a frame 41, a lifting unit 42, a feeding unit 43 (see FIG. 5), and a moving unit 44.

[0034] Four conveying sections 40 are positioned in the toilet room 200. Two of the four conveying sections 40 are positioned in pairs, sandwiching the Western-style toilet 10 between them. The pair of conveying sections 40 are aligned in the front-to-rear direction 8 along the left wall 61 and right wall 62. The structure of each of the pair of conveying sections 40 is the same except that the direction in which the sheet 100 is unfolded is opposite in the left-to-right direction 9. In the following explanation, unless otherwise specified, the conveying section 40 on the left wall 61 side of the pair of conveying sections 40 will be explained. The conveying section 40 on the right wall 62 side has a configuration in which the conveying section 40 on the left wall 61 side is reversed in the left-to-right direction 9.

[0035] Frame 41 As shown in FIG. 4, the frame 41 is, for example, entirely made of synthetic resin or metal. The frame 41 has, for example, an outer shape in plan view as seen from above that is U-shaped with an opening facing rightward. The length FL3 of the frame 41 in the left-right direction 9 is longer than the length SL2 of the sheet 100 in the left-right direction 9 (see FIG. 1) (FL3 > SL2). The lower surface of the frame 41 holds the sheet 100 in a state where the main surface is extended in the up-down direction 7. The frame 41 is movable from the storage position P1 to the deployment position P2. As shown in FIG. 5, each of the frames 41 is movable from the storage position P1 to the deployment position P2 by sliding on the upper surface of a flat rail 111 (see FIGS. 5 and 6) extending in the left-right direction 9. The frame 41 includes a base portion 411 and a pair of sheet holding portions 412.

[0036] [Base portion 411] As shown in FIG. 4, the base portion 411 is configured in a square bar shape and extends in the front-rear direction 8. The base portion 411 is located at the left end of the frame 41. Both end faces of the base portion 411 in the front-rear direction 8 are planes facing the front direction or the rear direction. On both end faces of the base portion 411 in the front-rear direction 8, there are located supported plates 415 that are plate-shaped with an L-shaped cross section and protrude in the front-rear direction 8 and then bend downward. The length FL1 of the base portion 411 is longer than the length SL1 of the sheet 100 in the front-rear direction 8 (see FIG. 1) and shorter than the dimension TL1 of the side wall opening 210 in the front-rear direction 8 (see FIG. 2) (SL1 < FL1 < TL1). Inside the base portion 411, there is a rechargeable battery (not shown).

[0037] [Sheet holding portions 412] Each of the pair of sheet holding portions 412 is configured in a square bar shape. The pair of sheet holding portions 412 are arranged in the front-rear direction 8. The left end of each of the pair of sheet holding portions 412 is connected to the front end portion and the rear end portion of the base portion 411 via a shaft 501. The length FL2 of the pair of sheet holding portions 412 in the left-right direction 9 is longer than the length SL2 of the sheet 100 in the left-right direction 9 (see FIG. 1) (FL2 > SL2). Each of the pair of sheet holding portions 412 includes an intermediate portion 413 and a tip portion 414.

[0038] In the following description, a state in which the pair of sheet holding portions 412 entirely extend rightward from the base portion 411 is referred to as a first state (see FIGS. 4 and 12). A state in which the middle portion 413 extends rightward and the tip portion 414 is rotated upward relative to the first state is referred to as a second state (see FIG. 10). A state in which the pair of sheet holding portions 412 entirely extend upward from the base portion 411 is referred to as a third state (see FIG. 14).

[0039] [Middle section 413] The intermediate portion 413 is rod-shaped. One end of the intermediate portion 413 is connected to the base portion 411. The intermediate portion 413 is connected to the base portion 411 so as to be rotatable around an axis 501 along the front-rear direction 8. A motor 32 (see FIG. 16 ) is located in the intermediate portion 413. The motor 32 is electrically connected to a battery located in the base portion 411. When the motor 32 is driven, the intermediate portion 413 rotates around the axis 501 between a state in which it extends in the left-right direction 9 (horizontal direction) relative to the base portion 411 and a state in which it extends upward. In the first and second states, the intermediate portion 413 extends rightward relative to the base portion 411. In the third state, the intermediate portion 413 extends upward relative to the base portion 411.

[0040] A plate-shaped first holding plate 416 having a main surface that extends downward in the longitudinal direction of the intermediate portion 413 and when not sandwiching the sheet 100 in the first state is connected to the lower surface of the intermediate portion 413. The first holding plate 416 has a rectangular outer shape in a plan view and is positioned with its main surface facing the front-rear direction 8. The first holding plate 416 is connected to the lower surface of the intermediate portion 413 so as to be rotatable about an axis (not shown) that extends along the left-right direction 9. By rotating about the axis, the first holding plate 416 is rotatable between a state in which its main surface faces the front-rear direction 8 and a state in which its main surface faces the up-down direction 7. In the first state, the sheet 100 can come into contact with the lower surface of the intermediate portion 413 from below.

[0041] A motor 35 (see FIG. 16 ) for rotating the first holding plate 416 is located in the intermediate portion 413. The motor 35 is electrically connected to a battery located in the base portion 411. When the motor 35 is driven by power supplied from the battery, the first holding plate 416 rotates about its axis between a state in which its main surface faces the front-rear direction 8 and a state in which its main surface faces the up-down direction 7. When the first holding plate 416 faces its main surface in the up-down direction 7, the one main surface of the first holding plate 416 facing upward faces the lower surface of the intermediate portion 413. The one main surface of the first holding plate 416 facing upward can clamp the edge of the sheet 100 that contacts the lower surface of the intermediate portion 413 between itself and the opposing lower surface of the intermediate portion 413. The first holding plate 416 in the intermediate portion 413 located on the front side is connected to the front end side of the lower surface of the intermediate portion 413. The first holding plate 416 of the intermediate portion 413 located on the rear side is connected to the rear end side of the lower surface of the intermediate portion 413. The angular velocity and position of the intermediate portions 413 of the pair of seat holding portions 412 that rotate relative to the base portion 411 are synchronized with each other. This prevents slack from occurring in the seat 100 when the intermediate portions 413 rotate.

[0042] [Tip 414] The tip portion 414 is rod-shaped. One end of the tip portion 414 is connected to the other end of the intermediate portion 413 (the end opposite to the end connected to the base portion 411). The tip portion 414 is connected to the intermediate portion 413 so as to be rotatable around an axis 503 along the front-rear direction 8. A motor 33 (see FIG. 16 ) is located at the tip portion 414. The motor 33 is electrically connected to a battery located in the base portion 411. When the motor 33 is driven, the tip portion 414 rotates around the axis 503 between a state in which it extends along the intermediate portion 413 (a state in which it extends horizontally relative to the intermediate portion 413) and a state in which it is bent from the intermediate portion 413 (a state in which it extends upward relative to the intermediate portion 413). With the base portion 411 as the reference, the tip portion 414 rotates between a state in which it extends in the left-right direction 9 and a state in which it extends upward. In the first state, the tip portion 414 extends rightward relative to the base portion 411. In the second and third states, the tip portion 414 extends upward relative to the base portion 411.

[0043] A plate-shaped second holding plate 417 is positioned on the underside of the tip portion 414 in the longitudinal direction of the tip portion 414 and has a main surface that extends downward when the sheet 100 is not being clamped in the first state. The second holding plate 417 has a rectangular outer shape in a plan view and is positioned with its main surface facing the front-rear direction 8. The second holding plate 417 is connected to the underside of the tip portion 414 so as to be rotatable about an axis 504 (see FIGS. 5 and 6 ) that extends along the left-right direction 9. By rotating about the axis 504, the second holding plate 417 is rotatable between a state in which its main surface faces the front-rear direction 8 and a state in which its main surface faces the up-down direction 7. When the second holding plate 417 has its main surface facing the front-rear direction 8, the sheet 100 can come into contact with the underside of the tip portion 414 from below.

[0044] A motor 36 (see FIG. 16 ) for rotating the second holding plate 417 is located at the tip end portion 414. The motor 36 is electrically connected to a battery located in the base portion 411. When the motor 36 is driven by power supplied from the battery, the second holding plate 417 rotates around the shaft 504, and is rotatable between a state in which its main surface faces the front-rear direction 8 and a state in which its main surface faces the up-down direction 7. When the second holding plate 417 faces its main surface in the up-down direction 7, the one main surface of the second holding plate 417 facing upward faces the lower surface of the tip end portion 414. The one main surface of the second holding plate 417 facing upward can clamp the edge of the sheet 100 between itself and the lower surface of the opposite tip end portion 414. The second holding plate 417 of the tip end portion 414 located forward of the pair of sheet holding portions 412 is connected to the front end side of the lower surface of the tip end portion 414. Of the tip portions 414 of the pair of sheet holding parts 412, the second holding plate 417 of the tip portion 414 located on the rear side is connected to the rear end side of the lower surface of the tip portion 414. The angular velocity and position of the tip portions 414 of the pair of sheet holding parts 412 that rotate relative to the intermediate part 413 are synchronized with each other. This prevents slack from occurring in the sheet 100 when the tip portions 414 rotate.

[0045] [Lifting section 42] As shown in Figures 7 and 8, the lifting unit 42 is an elevator that supports the frame 41 and moves it in the vertical direction 7. The lifting unit 42 is located along the left wall 61 in the interior space 191 of the toilet room 200, and extends in the vertical direction 7. The lifting units 42 are located in pairs, sandwiching the side wall opening 210 (opening door 20) between them (see Figures 1 and 2). The lifting units 42 move the frame 41 in the vertical direction 7. Each lifting unit 42 includes a pulley 421, an endless belt 422, and a guide 423.

[0046] The pulleys 421 are located in pair at the lower and upper ends of the lifting section 42. The shaft of the pulleys 421 extends in the left-right direction 9. The shaft of the pulleys 421 is connected to the motor 34 (see FIG. 16 ), and is rotatable around the shaft by the driving force transmitted from the motor 34.

[0047] The endless belt 422 is looped around a pair of pulleys 421 and is rotatable in response to the rotation of the pulleys 421. The length BL1 of the endless belt 422 in the width direction is longer than the length PL1 (see FIG. 4) of the supported plate 415 of the frame 41 in the left-right direction 9 (BL1>PL1). Of the main surfaces of the pair of endless belts 422 facing radially outward, a pair of support portions 424 that support the supported plate 415 are located on each of the opposing main surfaces. The distance between the main surfaces facing radially outward of the pair of endless belts 422 is longer than the length of the base 411 in the front-rear direction 8.

[0048] The pair of support portions 424 are located at the same height in the vertical direction 7. The support portions 424 project from the main surface on the radially outer side of the endless belt 422. The support portions 424 project in a U-shaped cross section from the main surface of the endless belt 422 so as to form, for example, through holes 425 penetrating in the vertical direction 7 between the main surface of the endless belt 422. The length ML1 of the through holes 425 in the left-right direction 9 is larger than the length PL1 of the supported plate 415 in the left-right direction 9 (ML1 > PL1). Thereby, a part of the supported plate 415 extending downward can be inserted into the through holes 425 from above. As shown in FIG. 3, the pair of support portions 424 are located below the supported plate 415 in a state where the supported plate 415 is not supported. Thereby, the pair of support portions 424 can move from below and support the supported plate 415 of the frame 41 that has advanced to the deployment position P2. The distance ML2 between the pair of support portions 424 is smaller than the length FL4 between the main surfaces facing each of the front surface and the rear surface of the base portion 411 at the portion where the supported plate 415 located on the front surface and the rear surface of the base portion 411 bends downward (ML2 < FL4, see FIG. 11). The pair of support portions 424 project from the main surface of the endless belt 422 at a distance such that they can abut from below on the portions of the supported plate 415 projecting in the front-rear direction 8.

[0049] The guides 423 are positioned in a pair on either side of the endless belt 422 in the left-right direction 9. The guide 423 is a plate body having a rectangular outer shape in a plan view. Both main surfaces of the guide 423 face the left-right direction 9. The front end of the guide 423 is located forward of the radially outer main surface of the endless belt 422 facing forward. The rear end of the guide 423 is located rearward of the radially outer main surface of the endless belt 422 facing rearward. Of the pair of guides 423, the left guide 423 is located between the endless belt 422 and the left wall 61. The pair of guides 423 function to prevent the endless belt 422 from slipping off from the pulley 421 in the left-right direction 9. The left guide 423 has a recess 426 recessed in the front-rear direction 8 from the front or rear end at a position adjacent to the side wall opening 210 in the front-rear direction 8. In the pair of lifting / lowering sections 42, the recesses 426 face each other across the side wall opening 210. In the pair of lifting / lowering sections 42, the recesses 426 are recessed in the front-rear direction 8 to such an extent that they do not protrude beyond the radially outer main surfaces of the opposing endless belts 422. This prevents the supported plate 415 of the frame 41, which enters the internal space 191 from the side wall opening 210, from colliding with the guide 423 located on the left side.

[0050] [Lower Pit 50] As shown in Figures 1 and 2, the lower pit 50 is located under the floor of the toilet room 200 (below the floor surface 46). The lower pit 50 is a space that leads from the floor surface 46 adjacent to the left wall 61 and the right wall 62 to under the floor of the toilet room 200 in the interior space 191 of the toilet room 200. The width of the lower pit 50 in the left-right direction 9 is the same as or greater than the width of the toilet room 200. The front wall 141 of the lower pit 50 is located forward of the storage lid 15, which will be described later and is located at the forefront. The rear wall 142 is located rearward of the storage lid 15, which is located at the rearmost.

[0051] As shown in FIGS. 1 and 2, the lower pit 50 has, for example, a bottom surface 143 that slopes forward. The lower pit 50 has a first opening 151 (an example of an opening facing upward) and a second opening 145. As shown in FIGS. 3, 9, 10, 12, 13, and 15, the first opening 151 (see FIG. 3) of the lower pit 50 is located on the floor surface 46 in the internal space 191. The first opening 151 opens facing upward. The dimension hL1 of the first opening 151 in the front-to-rear direction 8 is longer than the length SL1 of the seat 100 in the front-to-rear direction 8 (hL1 > SL1). The second opening 145 is located on the floor surface 46 in front of the Western-style toilet 10 inside the toilet room 200. The second opening 145 is closed by a plate-shaped floor cover 146. When the floor cover 146 is opened, access to the lower pit 50 becomes possible from the interior space 191 of the toilet room 200.

[0052] The storage lid 15 is located at the first opening 151 of the lower pit 50. The storage lid 15 is a plate body and opens and closes the first opening 151 of the lower pit 50. The left edge of the storage lid 15 is pivoted to the opening end 152. The left edge of the storage lid 15 is pivoted to the opening end 152 by a shaft 153 (see Figure 3) that extends along the front-to-rear direction 8. The storage lid 15 opens and closes by rotating around the axis of the shaft 153 when a driving force is transmitted from the motor 37 (see Figure 16).

[0053] [Feeding section 43] As shown in FIGS. 5 and 6, the feeder 43 is located in the storage space 190. In this embodiment, the feeder 43 is, for example, an electric vacuum lifter having suction cups 431 and an air supply mechanism 432 for the suction cups 431. The suction cups 431 are configured to be movable up and down in the storage space 190 by the driving force of a motor 38 (see FIG. 16). The suction cups 431 are positioned with their openings facing downward. The suction cups 431 are positioned above the sheets 100 placed on the sheet tray 110. The suction cups 431 are configured to be movable up and down in the vertical direction 7 between the upper surface of the uppermost sheet 100 and the lower surface of the sheet holding portion 412. When the air supply mechanism 432 is driven, the suction cups 431 adsorb the upper surface of the sheet 100.

[0054] [Mobile part 44] As shown in FIG. 3, the moving unit 44 is located in the storage space 190. The moving unit 44 moves the frame 41 back and forth between the storage position P1 and the deployed position P2, and is detachable from the frame 41. The moving unit 44 is detachable from the left or right surface of the base 411 of the frame 41. The moving unit 44 includes a pulley 441, an endless belt 442, and a detachable unit 443. The pulley 441 and the endless belt 442 are examples of a sub-moving unit.

[0055] The pulleys 441 are positioned in a pair, side by side in the left-right direction 9. The shaft of the pulley 441 extends in the front-rear direction 8. The shaft of the pulley 441 is connected to a motor 51 (see FIG. 16), and is rotatable about the shaft by the driving force transmitted from the motor 51. The pulley 441 is positioned above the top surface of the uppermost sheet 100 placed on the sheet tray 110 in the up-down direction 7. The pulley 441 is positioned, for example, above the center position of the frame 41 in the front-rear direction 8.

[0056] The endless belt 442 is looped around a pair of pulleys 441 and configured to be rotatable by the rotation of the pulleys 441. The endless belt 442 is located above the frame 41 and extends in the left-right direction 9.

[0057] The detachable part 443 is connected to the downward-facing principal surface of the endless belt 442 that faces radially outward. The detachable part 443 is box-shaped and configured to be detachably attached to the left or right surface of the base 411. The detachable part 443 is configured to be detachably attached to the left or right surface of the base 411 by, for example, an electromagnet 419 (see FIG. 16 ). The detachable part 443 moves the frame 41 while being magnetized with the frame 41 between the stored position P1 and the deployed position P2. The detachable part 443 detaches from the frame 41 at the deployed position P2. The detachable part 443 has a power supply mechanism (not shown) that can supply power to a battery located in the base 411.

[0058] A controller 16 is disposed in the toilet room 200. The controller 16 is mounted on, for example, the base 411 and electrically connected to a battery. As shown in FIG. 16 , the controller 16 includes a CPU 161, a ROM 162, a RAM 163, an EEPROM 164, an ASIC 165, and the like, all connected via a bus so that data communication is possible. The CPU 161 executes a program stored in the ROM 162, and the ASIC 165 performs a specific function that has been set, thereby controlling the operation of the seat unfolding device 1. The controller 16 is connected to the weight sensor 21, motors 31, 32, 33, 34, 35, 36, 37, 38, 51, and a power supply circuit 39.

[0059] The EEPROM 164 etc. stores a control program that controls the motors 31, 32, 33, 34, 35, 36, 37, 38, 51 and the power supply circuit 39 in accordance with the first signal, second signal, and third signal output from the weight sensor 21. Note that the controller 16 may be configured so that various processes are executed only by the CPU 161. The controller 16 may be configured so that various processes are executed only by the ASIC 165. The controller 16 may be implemented with multiple CPUs that share and execute each process. The controller 16 may be implemented with multiple ASICs 165 that share and execute each process.

[0060] (Operation of sheet unfolding device 1) Next, the operation of the sheet spreading device 1 will be described. 17, the controller 16 determines whether or not a second signal has been received from the weight sensor 21 (step S1). The state in which the second signal is received is a state in which the user has entered the toilet room 200 and is facing the Western-style toilet 10. The controller 16 proceeds to step S2 based on the determination that the second signal has been received from the weight sensor 21. The controller 16 repeats step S1 based on the determination that the second signal has not been received from the weight sensor 21.

[0061] In step S2, the controller 16 determines whether or not a third signal has been received. The state in which the third signal is received is a state in which the user is sitting on the Western-style toilet 10. If the controller 16 determines that the third signal has been received, the controller 16 proceeds to step S3. On the other hand, if the controller 16 determines that the third signal has not been received, the controller 16 proceeds to step S4.

[0062] In step S3, the controller 16 determines whether or not the second signal has been received again. If the second signal has been received again, the controller 16 proceeds to step S4. On the other hand, if the second signal has not been received, the controller 16 repeats step S3.

[0063] In step S4, the controller 16 determines whether or not a first signal has been received. The state in which the first signal is received is a state in which the user has left the toilet room 200. If the controller 16 has received the first signal, the process proceeds to step S5. On the other hand, if the first signal has not been received, the process returns to step S2.

[0064] In step S5, a sheet holding operation is performed. In the sheet holding operation, as shown in FIG. 5, the feeding unit 43 adsorbs the uppermost sheet 100 of the sheet stack placed on the sheet tray 110 and moves it upward. The feeding unit 43 abuts the upper surface of the adsorbed sheet 100 against the lower surface of the frame 41 (the lower surface of the middle portion 413 and the lower surface of the leading end portion 414). The controller 16 controls the motors 35 and 36 to orient both main surfaces of the first holding plate 416 and the second holding plate 417 horizontally from below. As a result, as shown in FIG. 6, the sheet 100 is sandwiched between the first holding plate 416, the second holding plate 417, and the lower surface of the frame 41. After the sheet 100 is held by the frame 41, the feeding unit 43 releases the adsorption of the sheet 100.

[0065] Next, in step S6, a frame advancing operation is realized. In the frame advancing operation, the pulley 441 starts to rotate, causing the endless belt 442 to rotate. As shown in FIG. 9, the rotation of the endless belt 442 moves the detachable portion 443 from the storage position P1 toward the unfolded position P2. Accordingly, the frame 41 magnetized to the detachable portion 443 and the seat 100 held by the frame 41 also move from the storage position P1 toward the unfolded position P2. The base 411 connected to the detachable portion 443 by the electromagnet 419 is pushed toward the unfolded position P2 by the movement of the detachable portion 443. As the base 411 is pushed, the entire frame 41 moves toward the unfolded position P2 in the first state. The opening door 20 is driven by the motor 31 to move from the closed position S1 (see FIG. 3) to the open position S2 (see FIG. 10).

[0066] As shown in Figures 9 and 10, in the frame 41 positioned to the side of the Western-style toilet 10, the tip 414 that has entered the interior space 191 of the toilet room 200 through the side wall opening 210 is rotated upward. The frame 41 enters the second state due to the rotation of the tip 414. The frame 41 positioned to the side of the Western-style toilet 10 is moved to the deployed position P2 with the tip 414 facing upward. Note that the frame 41 that is not positioned to the side of the Western-style toilet 10 is moved from the storage position P1 to the deployed position P2 while remaining in the first state.

[0067] Next, in step S7, a frame support operation is performed. In the frame support operation, the supply of power to the electromagnet 419 is cut off at the deployed position P2, thereby detaching the base 411 from the detachable part 443. As shown in FIG. 11 , the endless belt 422 of the lifting / lowering part 42 is rotated so that the opposing main surfaces move upward. As a result, the support part 424 located on the endless belt 422 fits into the supported plate 415 of the frame 41 located at the deployed position P2. Specifically, the downwardly extending portion of the supported plate 415 of the frame 41 is inserted into the through-hole 425 of the support part 424 located on the endless belt 422, and the frame 41 is supported from below by the support part 424.

[0068] Next, in step S8, the up-and-down movement is realized. In the up-and-down movement, the motor 34 rotates the pulley 421, which rotates the endless belt 422. The rotation of the endless belt 422 causes the support portion 424 that supports the frame 41 to start moving upward. The support portion 424 moving upward also causes the frame 41 to start moving upward. As a result, the frame 41 and the seat 100 move upward from the unfolded position P2.

[0069] The frame 41, located to the side of the Western-style toilet 10, rises and reaches an intermediate position P7 (see FIG. 12) above the Western-style toilet 10. At the intermediate position P7, the motor 33 operates to rotate the tip 414 of the frame 41 horizontally. As a result, the frame 41, located to the side of the Western-style toilet 10, extends horizontally. The frames 41 of the pair of conveying units 40 are positioned in the internal space 191 so that the ends opposite the intermediate portion 413 of the tip 414 face each other, and the sheets 100 of each conveying unit 40 generally cover the horizontal surface of the toilet room 200. As shown in FIG. 13, the frame 41 rises to an upper end position P3 (see FIG. 13) close to the ceiling due to the rotation of the endless belt 422.

[0070] After the pulley 421 moves the frame 41 to the upper end position P3, it is rotated in the reverse direction by the driving force of the motor 34. Due to the reverse rotation of the pulley 421, the endless belt 422 also starts to rotate in the reverse direction. Due to the reverse rotation of the endless belt 422, the support part 424 starts to move downward from the upper end position P3. As the support part 424 starts to move downward, the frame 41 also starts to move downward from the upper end position P3.

[0071] The seat holding portion 412 of the frame 41, which has started to move downward, starts to rotate upward while descending due to the driving force of the motor 32. As shown in Fig. 14, the seat holding portion 412 is rotated by the driving force of the motor 32 to a position where it extends upward from the base portion 411, and reaches the third state. With the seat holding portion 412 extending upward, the frame 41 moves downward past the midpoint P7 to the deployed position P2.

[0072] Next, in step S9, a sheet release operation is performed. In the sheet release operation, the first holding plate 416 and the second holding plate 417 are rotated by the driving forces of the motors 35 and 36. As shown in FIG. 15 , the rotation causes both main surfaces of the first holding plate 416 and the second holding plate 417 to face the front-rear direction 8. As the first holding plate 416 and the second holding plate 417 rotate, the sheet 100 is released from the clamping between the lower surfaces of the leading end portion 414 and the middle portion 413 and the first holding plate 416 and the second holding plate 417. The released sheet 100 falls downward due to gravity.

[0073] In conjunction with the rotation of the first holding plate 416 and the second holding plate 417, the storage lid 15 is rotated by the driving force of the motor 37 from a state in which its main surface faces in the up-down direction 7 to a state in which its main surface faces in the left-right direction 9. As the storage lid 15 rotates, the first opening 151 of the lower pit 50 is opened. The sheets 100 falling downward pass through the first opening 151 and are stored in the lower pit 50. After a predetermined time has elapsed since the storage lid 15 was opened, the storage lid 15 is rotated again by the driving force of the motor 37 to a position in which the first opening 151 is closed.

[0074] Next, in step S10, the frame is moved backward by the driving force of the motor 32. In the frame moving backward, the sheet holding portion 412 is rotated from above so as to face horizontally.

[0075] Here, in the frame 41 located to the side of the Western-style toilet 10, the driving force of the motor 33 rotates the tip portion 414 so as to extend upward relative to the intermediate portion 413. This causes the tip portion 414 to enter a second state in which it is bent upward relative to the intermediate portion 413.

[0076] When the intermediate portion 413 is rotated to a position extending horizontally, the electromagnet 419 is driven by the power supply circuit 39, and the detachable portion 443 and the base portion 411 are connected. After the detachable portion 443 and the base portion 411 are connected, the pulley 421 is rotated by the driving force of the motor 34 in the lifting portion 42. The rotation of the pulley 421 rotates the endless belt 422, and the support portion 424 moves further downward. As a result, the engagement between the support portion 424 and the supported plate 415 is released, and the support of the frame 41 by the support portion 424 is released. With the support by the support portion 424 released, the frame 41 becomes movable in the left-right direction 9.

[0077] Thereafter, the drive force of the motor 51 starts to rotate the pulley 441, causing the endless belt 442 to move the detachable part 443 in the backward direction. When the frame 41 is moved from the deployed position P2 to the stored position P1, the tip 414 of the frame 41 located on the side of the Western-style toilet 10 is rotated by the drive force of the motor 33 so as to extend horizontally. As the detachable part 443 moves the frame 41 to the stored position P1, the frame 41 is stored in the storage space 190 inside the side wall. Thereafter, the opening door 20 is lowered by the drive of the motor 31. The lowering of the opening door 20 closes the side wall opening 210. This ends the processing of this flow.

[0078] (Effects of the embodiment) The sheet 100 is moved from the storage position P1 to the deployed position P2. Then, the sheet 100 is moved upward from the deployed position P2 to capture droplets and bacteria floating in the air, thereby maintaining a clean room.

[0079] The sheet 100 is deployed after the user leaves the toilet room 200, so droplets and bacteria can be efficiently collected.

[0080] The sheet 100 that has collected droplets and bacteria can be collected in the space under the floor without touching it, making it hygienic.

[0081] Droplets and bacteria in the interior space 191 of the toilet room 200 can be collected over a wide area.

[0082] After the frame 41 holding the sheet 100 is advanced from the storage position P1 to the deployment position P2, the sheet 100 is moved up and down between the deployment position P2 and the upper end position P3 by the lifting unit 42. The sheet 100 moving in the vertical direction 7 can effectively capture droplets and bacteria.

[0083] By rotating the seat holding part 412 relative to the base part 411 and facing upward, it is possible to avoid contact between the Western-style toilet bowl 10 and the seat 100 when the toilet is lowered. When the seat holding part 412 is facing upward in the deployed position P2, the seat 100 is released from its hold on the seat holding part 412, and the seat 100 can be easily sent into the space under the floor by utilizing gravity.

[0084] By rotating the tip 414 upward, the tip 414 of the sheet holding part 412, which moves from the storage position P1 to the deployment position P2, is prevented from coming into contact with the Western-style toilet 10. By orienting the tip 414 horizontally at the midpoint P7, which exceeds the height of the Western-style toilet 10, the area of the sheet 100 with its main surface facing in the vertical direction 7 becomes larger. The area for capturing droplets and bacteria can be expanded while taking into consideration the conditions inside the toilet room 200.

[0085] The seat holding unit 412 can be easily moved between the storage position P1 and the deployed position P2 simply by moving the detachable unit 443 in the moving unit 44. At the deployed position P2, the detachable unit 443 separates the seat holding unit 412, allowing the seat holding unit 412 to move up and down, so that the seat holding unit 412 can be easily switched between deployed and stored positions.

[0086] (Variation) In addition to the weight sensor 21, the seat unfolding device 1 may also include a toilet seat sensor that detects the weight of the toilet seat 102 of the Western-style toilet 10. In this case, the controller 16 may detect that the user is not present in the toilet room 200 based on the fact that the weight sensor 21 does not detect a weight equal to or greater than a predetermined threshold and the toilet seat sensor does not detect a weight equal to or greater than a predetermined threshold.

[0087] In the above embodiment, instead of the weight sensor 21, an operation start switch located outside the toilet room 200 or a light switch for turning a light on and off may be used. The seat unfolding device 1 may start its operation on the condition that the operation start switch is pressed. Also, the seat unfolding device 1 may start its operation on the condition that the light in the toilet room 200 is turned off by the light switch.

[0088] In the above embodiment, an electric vacuum lifter is used as an example of the feeding unit 43, but this is not limiting. The feeding unit 43 may move the uppermost sheet 100 among the stacked sheets 100 to below the sheet holding unit 412 by rotating a roller (not shown). The moved sheet 100 may be sandwiched between the first holding plate 416 and the second holding plate 417 and the lower surface of the sheet holding unit 412.

[0089] In the above embodiment, a toilet without a tank has been described as an example of the Western-style toilet 10, but this is not limiting. The Western-style toilet 10 may have a tank, and the midpoint P7 of the frame 41 may be above the tank.

[0090] In the above embodiment, the conveying unit 40 located on the side of the Western-style toilet 10 rotates the tip portion 414 of the frame 41, but this is not limited to this. The sheet holding unit 412 may be configured with only the middle portion 413. This reduces the number of mechanical elements in the frame 41, thereby realizing low costs and improving durability.

[0091] In the above embodiment, in step S6, a configuration was exemplified in which the frame 41 that is not located to the side of the Western-style toilet 10 is moved from the storage position P1 to the deployment position P2 while remaining in the first state, but the frame 41 that is not located to the side of the Western-style toilet 10 may also be configured to be in the second state like the frame 41 that is located to the side of the Western-style toilet 10.

[0092] In the above embodiment, four conveying units 40 are provided in the toilet room 200, and a configuration in which pairs of conveying units 40 are lined up in the front-rear direction 8 along the left wall 61 and the right wall 62 is exemplified, but the number and arrangement of the conveying units 40 are not limited to this. For example, two or six or more conveying units 40 may be provided, and they may be arranged on only one side wall.

[0093] [Appendix 1] Western-style toilets and a sensor that detects a user facing the Western-style toilet; a conveying unit that moves a sheet between a first position in a storage space inside a side wall of a room in which the Western-style toilet is installed and a second position in the interior space of the room around the Western-style toilet; a controller; The controller causes the conveying unit to move the sheet from the first position to the second position based on the output signal of the sensor, and then moves the sheet upward.

[0094] [Appendix 2] the sensor is a weight sensor, the weight sensor outputs a first signal indicating a first weight and a second signal indicating a second weight that is heavier than the first weight; The sheet unfolding device described in Appendix 1, wherein the controller, after receiving the second signal, causes the conveying section to move the sheet from the first position to the second position based on receiving the first signal, and then moves the sheet upward.

[0095] [Appendix 3] Further provided is an underfloor space that leads from a floor surface located below the second position to the underfloor, the conveying unit is capable of sending the sheet into the underfloor space, The above controller is The seat unfolding device according to claim 1, wherein the conveying unit lowers the seat, which has moved upward from the second position, to the second position, and then sends the seat into the underfloor space.

[0096] [Appendix 4] The conveying unit is a plurality of units, The conveying units are located in pairs on either side of the Western-style toilet, The sheet unfolding device according to claim 1, wherein the pair of conveying sections are aligned along the side walls.

[0097] [Appendix 5] The conveying unit is a frame capable of holding the seat and movable between the first position and the second position; an elevator unit that supports the frame and moves it in the up and down direction from the second position; a feeding section that feeds the sheet placed in the storage space to the frame at the first position; 2. The sheet unfolding device according to claim 1, further comprising: a moving unit that moves the frame between the first position and the second position.

[0098] [Appendix 6] The above frame is a base portion that is detachable from the moving portion and that can be supported by the lifting portion; a pair of rod-shaped sheet holding portions connected to the base and positioned along the side walls, the rod-shaped sheet holding portions being rotatable between a state in which they extend horizontally relative to the base and a state in which they extend upward, and capable of holding the sheet; The above controller is The lifting unit moves the frame upward from the second position and then lowers the frame to the second position; A seat unfolding device as described in Appendix 5, wherein when the frame descends to the second position, the seat holding portion is rotated relative to the base from a state in which it extends horizontally to a state in which it extends upward, and the seat is released from its holding position at the second position.

[0099] [Appendix 7] The sheet holding portion is an intermediate portion having one end connected to the base portion; a tip portion having one end connected to the other end of the intermediate portion and rotatable between a state in which it extends in the horizontal direction and a state in which it extends in the upward direction relative to the intermediate portion, The above controller is The seat unfolding device described in Appendix 6, wherein when the frame moves from the first position to the second position, the tip portion is rotated toward a state in which it extends upward relative to the intermediate portion, and when the frame moves upward from the second position, the tip portion is rotated toward a state in which it extends horizontally relative to the intermediate portion at a position above the height of the Western-style toilet.

[0100] [Appendix 8] The moving part is a detachable portion that is detachable from the base portion; a sub-movement unit that can move the attachment / detachment unit in the horizontal direction, The above controller is The sheet unfolding device according to claim 6 or 7, wherein the frame is moved between the first position and the second position by moving the attachment / detachment unit using the sub-movement unit, and the base is attached / detached at the second position. [Explanation of symbols]

[0101] 1. Sheet unfolding device 10. Western-style toilet 15 Storage lid 16. Controller 21. Weight sensor (sensor) 40...Transport unit 41...frame 42 Lifting section 43... Feeding section 44 Moving part 46...Floor 50···Lower pit (underfloor space) 61 Left wall 62...Right wall 100 sheets 151 First opening (opening) 190... Storage space 191...Interior space 200···Toilet room (room) 411...Base 412 Seat holding part 413···Middle section 414...Tip 443···Detachable part P1: Storage position (first position) P2... Deployed position (2nd position)

Claims

1. Western-style toilets and a sensor that detects a user facing the Western-style toilet; a conveying unit that moves a sheet between a first position in a storage space inside a side wall of a room in which the Western-style toilet is installed and a second position in the interior space of the room around the Western-style toilet; a controller; The controller, on the condition that it determines based on the output signal of the sensor that the user has left the room, moves the sheet from the first position to the second position using the conveying unit, and then moves the sheet upward.

2. the sensor is a weight sensor, the weight sensor outputs a first signal indicative of a first weight and a second signal indicative of a second weight that is heavier than the first weight; 2. The sheet unfolding device according to claim 1, wherein the controller, after receiving the second signal, causes the conveying section to move the sheet from the first position to the second position based on receiving the first signal, and then moves the sheet upward.

3. Further provided is an underfloor space that communicates with the underfloor from a floor surface located below the second position, the conveying unit is capable of sending the sheet into the underfloor space, The above controller is 2. The seat unfolding device according to claim 1, wherein the conveying unit lowers the seat, which has moved upward from the second position, to the second position, and then sends the seat into the underfloor space.

4. The conveying unit is a plurality of units, The conveying units are located in pairs on either side of the Western-style toilet, The sheet spreading device according to claim 1 , wherein the pair of conveying sections are aligned along the side walls.

5. The conveying unit is a frame capable of holding the seat and movable between the first position and the second position; an elevator unit that supports the frame and moves it in the up and down direction from the second position; a feeding section that feeds the sheet placed in the storage space to the frame at the first position; The sheet spreading device according to claim 1 , further comprising: a moving unit that moves the frame between the first position and the second position.

6. The above frame is a base portion that is detachable from the moving portion and that can be supported by the lifting portion; a pair of rod-shaped sheet holding portions connected to the base and positioned along the side walls, the rod-shaped sheet holding portions being rotatable between a state in which they extend horizontally relative to the base and a state in which they extend upward, and capable of holding the sheet; The above controller is the lifting unit moves the frame upward from the second position and then lowers the frame to the second position; 6. The sheet unfolding device according to claim 5, wherein when the frame descends to the second position, the sheet holding portion is rotated relative to the base from a state in which it extends horizontally to a state in which it extends upward, and the holding of the sheet is released at the second position.

7. The sheet holding portion is an intermediate portion having one end connected to the base portion; a tip portion having one end connected to the other end of the intermediate portion and rotatable between a state in which it extends in the horizontal direction and a state in which it extends in the upward direction relative to the intermediate portion, The above controller is 7. The seat unfolding device according to claim 6, wherein when the frame moves from the first position to the second position, the tip portion is rotated toward a state in which it extends upward relative to the intermediate portion, and when the frame moves upward from the second position, the tip portion is rotated toward a state in which it extends horizontally relative to the intermediate portion at a position above the height of the Western-style toilet bowl.

8. The moving part is a detachable portion that is detachable from the base portion; a sub-movement unit that can move the attachment / detachment unit in the horizontal direction, The above controller is The sheet unfolding device according to claim 6 or 7, wherein the frame is moved between the first position and the second position by moving the attachment / detachment section using the sub-movement section, and the base section is attached / detached at the second position.

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