JP6856289B1 - Drainage structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drainage structure which can be easily switched to a covered state or a non-covered state and can improve hygiene. SOLUTION: The drainage structure is in a state where all or most of the recess 108 is hidden from the outside by arranging a recess forming portion forming a recess 108 that opens upward and a position that covers the recess 108. On the other hand, the cover portion 4 is provided so that the concave portion 108 can be in a non-covered state in which the concave portion 108 can be visually recognized from the outside by releasing the state of covering the concave portion 108. The cover portion 4 can be rotated by a rotation shaft located on the outer edge side of the cover portion 4, and can be switched between a covered state and a non-covered state by the rotation of the cover portion 4. Since it is possible to switch to the covered state or the non-covered state without lifting the cover portion and moving it to the concave portion or removing it from the concave portion, it is possible to easily switch to each state. [Selection diagram] Fig. 5

Description

The present invention relates to a drainage structure having a cover portion for concealing a recess into which drainage flows.

A recess in which drainage flows may be formed in a predetermined installation target portion [for example, a bathroom washing pan or a tank body (for example, a kitchen sink)], and a drainage structure may be installed corresponding to the recess. ..

Such a drainage structure includes a cover portion (cover member) capable of hiding all or most of the recesses from the outside (see, for example, Patent Document 1 and the like). By arranging the cover portion in the upper opening of the recess, all or most of the recess is hidden from the outside (cover state). In the covered state, foreign matter such as dirt and dust existing in the concave portion becomes invisible or difficult to see from the user, and the appearance quality is improved. On the other hand, by removing the cover portion from the recess, all or most of the recess becomes visible from the outside (non-covered state). In the non-covered state, it is possible to easily remove the foreign matter existing in the recess and clean the portion of the installation target portion that forms the recess.

Japanese Unexamined Patent Publication No. 2012-202127

By the way, in the drainage structure as described above, in order to switch between the covered state and the non-covered state, the cover portion is lifted and moved while being placed in the recess, or the cover portion is removed from the recess and then lifted and moved. I need to do it. Therefore, it is not possible to easily switch to the covered state or the non-covered state, which may result in insufficient convenience for the user. In addition, when the cover is not covered, the removed cover is placed on the installation target and its surroundings, so that dirt and foreign matter on the cover adhere to the part on which the cover is placed, resulting in hygiene. It may cause deterioration of property and cleanability.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a drainage structure capable of easily switching between a covered state and a non-covered state and improving hygiene and cleanability. To provide.

Hereinafter, each means suitable for solving the above object will be described in terms of terms. In addition, the action and effect peculiar to the corresponding means will be added as necessary.

Means 1. It is recessed in a predetermined installation target portion, which forms a recess that opens upward, is configured so that drainage can flow into the recess, and a drain pipe through which the inflowing drainage flows is connected to the bottom. Recessed part and
By arranging the recess so as to cover the recess, it is possible to make the cover state in which all or most of the recess is hidden from the outside, while the state of covering the recess is released to release the recess. It is equipped with a cover part that can be made uncovered so that it can be seen from the outside.
A drainage structure configured so that drainage can flow into the recess in both the covered state and the uncovered state.
The cover portion is supported in a rotatable state by a rotation shaft located on the outer edge side of the cover portion.
By rotating the cover portion so that the outer edge on the side opposite to the rotating shaft rises, it is possible to switch from the covered state to the non-covered state, while the opposite to the rotating shaft. By rotating the cover portion so that the outer edge on the side is lowered, the non-covered state can be switched to the covered state .
A drainage structure including a non-covered state maintaining means capable of maintaining the covered portion in a stopped state when the covered state is in the non-covered state.

According to the means 1, the cover portion is supported in a rotatable state by a rotating shaft located on the outer edge side thereof. Then, by rotating the cover portion so that the outer edge on the side opposite to the rotating shaft rises, the cover state is switched to the non-covered state, while the outer edge on the side opposite to the rotating shaft descends. By rotating the cover portion so as to do so, the non-covered state is switched to the covered state. By rotating the cover portion in this way, the cover portion is switched to the covered state or the non-covered state. Therefore, when switching to the covered state or the non-covered state, the cover portion is lifted and moved while being placed in the recess, or the cover portion is placed. It is not necessary to lift and move the cover after removing it from the recess. As a result, it is possible to easily switch to the covered state or the non-covered state, and the convenience for the user can be enhanced.

Further, according to the above means 1, since it is not necessary to remove the cover portion when switching to the covered state or the non-covered state, it is more reliable that the removed cover portion is placed on the installation target portion or the peripheral portion thereof. Can be prevented. Therefore, it is possible to suppress a situation in which dirt or foreign matter on the cover portion adheres to the portion on which the cover portion is placed, and it is possible to improve hygiene and cleanability.

Further, according to the above-mentioned means 1, the cover portion can be maintained in a stopped state by the non-covered state maintaining means without using a hand or the like, and the uncovered state can be maintained. Therefore, it becomes possible to more easily remove the foreign matter existing in the concave portion, clean the concave portion forming portion, and the like, and it is possible to further enhance the convenience for the user.

Means 2 . The drainage structure according to the means 1 , wherein the non-cover state maintaining means is configured so that the cover portion can be maintained in a stopped state at a plurality of types of rotation angles.

According to the above means 2 , the non-covered state maintaining means can maintain the cover portion in a stopped state at a plurality of types of rotation angles. Therefore, the degree of opening of the gap formed between the recess forming portion and the cover portion can be maintained at a plurality of different degrees. As a result, for example, by stopping the cover portion in a state where some of the gaps are formed, the recesses can be seen from the outside to some extent, but while the recesses are hidden to some extent by the cover portion, dust and drainage are discharged to the recesses. It is possible to allow the water to flow more smoothly, and to maintain the inside of the recess in a relatively dry state without significantly impairing the aesthetic appearance. Therefore, the width related to the usage of the drainage structure can be widened as compared with the configuration in which the rotation angle of the cover portion cannot be adjusted in the non-covered state. As a result, the convenience for the user can be further improved.

The stop angle of the cover portion may be continuously adjustable or may be adjustable stepwise.

Means 3 . An urging means for applying an urging force in the direction of switching from the covered state to the non-covered state to the cover portion.
It is provided with a locking means that can lock the cover portion in a state where rotation is restricted against the urging force applied from the urging means.
By pushing the surface of the cover portion to switch from the non-covered state to the covered state, the cover portion is locked by the locking means, and the covered state is maintained.
The drainage structure according to means 1 or 2 , wherein the cover portion can be unlocked by the locking means without directly touching the locking means.

According to the above means 3 , by pushing the surface of the cover portion to switch from the non-covered state to the covered state, the cover portion can be locked by the locking means and the covered state can be maintained. Therefore, it is possible to more reliably prevent a situation in which the cover portion is unintentionally rotated and the cover state is released.

Further, according to the above means 3 , by releasing the lock of the cover portion by the locking means, it is possible to switch from the covered state to the uncovered state by the urging force applied from the urging means. Therefore, the user does not have to apply a force to the cover portion to switch from the covered state to the non-covered state. As a result, it is possible to switch from the covered state to the uncovered state more easily, and the convenience for the user can be further improved.

Further, according to the above means 3 , for example, by applying a predetermined operation to the cover portion, the lock portion can be unlocked by the locking means without directly touching the locking means. Therefore, the lock of the cover portion can be released relatively easily.

Means 4 . An operation unit provided separately from the cover unit and to be operated by the user when switching to the cover state or the non-cover state.
It is provided with a rotation drive unit that supports the cover unit and is configured to be rotatable in response to an operation on the operation unit.
The drainage structure according to means 1 or 2 , wherein the cover portion is configured to rotate with the rotation of the rotation driving portion.

It should be noted that the "rotation drive unit configured to be rotatable in response to an operation on the operation unit" is, for example, a unit that rotates by an operation force applied to the operation unit or an operation on the operation unit as an opportunity. This refers to a motor or the like that rotates by a force generated by an energizing operation unit, a spring or the like that rotates by a force generated by a power generation unit such as a spring, or the like.

According to the above means 4 , the rotation drive unit is rotated by operating the operation unit, and as a result, the cover unit supported by the rotation drive unit is rotated to be in the covered state or the non-covered state. It can be switched to. Therefore, when switching to the covered state or the non-covered state, it is not necessary to directly touch the cover portion to which dirt or foreign matter easily adheres, and hygiene and safety can be improved. Further, by appropriately setting the installation position of the operation unit, the operability related to switching to the cover state or the non-cover state can be further improved as compared with the case where the cover unit is the operation target.

Means 5 . A foreign matter collecting portion that can collect foreign matter that has flowed into the recess and is removable outside the recess is provided.
By rotating the cover portion so as to switch from the cover state to the non-cover state, the foreign matter collecting portion is configured to be in a lifted state in conjunction with the cover portion. The drainage structure according to any one of the featured means 1 to 4.

According to the above means 5 , by rotating the cover portion so as to switch from the covered state to the non-covered state, the foreign matter collecting portion can be raised and lifted in conjunction with the cover portion. .. Therefore, when removing the foreign matter accumulated in the foreign matter collecting part or cleaning the foreign matter collecting part, if it is desired to remove the foreign matter collecting part to the outside of the recess, the cover part is rotated to be in an uncovered state. However, according to the above means 5 , if the cover portion is rotated so as to be in the non-covered state, the foreign matter collecting portion can be naturally easily removed to the outside of the recess. .. As a result, the foreign matter collecting portion can be removed very easily, and the convenience can be further improved.

In addition, when removing the foreign matter collecting part, it is possible to more reliably prevent the user from touching the installation part (placement part) of the foreign matter collecting part and the surrounding part, and better hygiene and safety. You can get sex.

Further, by maintaining the cover portion in the uncovered state, the foreign matter collecting portion can be maintained in a lifted state (a state in which the foreign matter collecting portion is floated from the installation site). Therefore, when it is desired to dry the cover portion, the concave portion forming portion, the foreign matter collecting portion, etc., it is possible to easily dry the foreign matter collecting portion by floating the foreign matter collecting portion with the cover portion in the uncovered state. Further, when the foreign matter collecting part is placed around the drainage structure to be dried, it is necessary to secure a place for the foreign matter collecting part, but according to the above means 5, it is not necessary to use the foreign matter collecting part. It is possible to improve the convenience for the person.

Means 6 . A foreign matter collecting portion that can collect foreign matter that has flowed into the recess and is removable outside the recess is provided.
The back surface of the cover portion is provided with a collecting portion holding means that can maintain the foreign matter collecting portion in a lifted state by locking the foreign matter collecting portion in the uncovered state. The drainage structure according to any one of means 1 to 4.

According to the above means 6 , the foreign matter collecting portion can be maintained in a lifted state (a state in which the foreign matter collecting portion is floated from the installation site) by the collecting portion holding means. Therefore, when it is desired to dry the cover portion, the concave portion forming portion, the foreign matter collecting portion, etc., it is possible to easily dry the foreign matter collecting portion by floating the foreign matter collecting portion while keeping the cover portion in the uncovered state.

Further, when the foreign matter collecting part is placed around the drainage structure to be dried, it is necessary to secure a place for the foreign matter collecting part, but according to the above means 6, it is not necessary to use the foreign matter collecting part. It is possible to improve the convenience for the person.

Means 7 . The drainage structure according to any one of means 1 to 6 , wherein the cover portion and the recess forming portion are configured so as not to come into contact with each other in the cover state.

The conventional cover portion is usually installed in a state of being supported by the concave portion forming portion by contacting a predetermined portion (for example, the legs formed at the four corners) in the covering state. However, in such an installation state, foreign matter is likely to be caught and stay at the contact portion between the cover portion and the recess forming portion. Therefore, at the time of cleaning or the like, the user may have to take the trouble of separately processing the foreign matter, which may reduce the convenience.

In this respect, according to the above means 7 , since the cover portion and the recess forming portion do not come into contact with each other in the cover state, it is possible to more reliably prevent the situation where foreign matter stays as described above. As a result, the convenience for the user can be further enhanced.

Further, according to the above means 7 , it is possible to make it difficult for the drainage flow to be obstructed, and it is possible to obtain better drainage performance.

Means 8 . It is rotatable by the rotating shaft and has a rotating support portion that supports the cover portion.
The drainage structure according to any one of means 1 to 7 , wherein the cover portion is detachably configured with respect to the rotation support portion.

According to the means 8 , the cover portion is detachable from the rotation support portion. Therefore, the cover portion can be removed from the rotation support portion, and the cover portion can be cleaned as a single unit, and the convenience can be further improved. Further, if the cover portion is damaged or the like, it is possible to make it easier to deal with the damage or the like (for example, repair or replacement work of the cover portion). Further, it is possible to appropriately change the cover portion having a different color, design, etc. according to the surrounding environment of the drainage structure and the needs of the user.

In the first embodiment, it is a perspective view of the drainage structure in the “cover state”. FIG. 5 is a cross-sectional view taken along the line JJ of FIG. It is a cross-sectional view taken along the line KK of FIG. In the first embodiment, it is a perspective view of the drainage structure in the state where the cover part is removed. In the first embodiment, it is a perspective view of the drainage structure in the “uncovered state”. In the first embodiment, it is sectional drawing of the drainage structure in the "uncovered state". In the first embodiment, it is sectional drawing of the drainage structure in the "uncovered state". In the second embodiment, it is a perspective view of the drainage structure in the “cover state”. 8 is a cross-sectional view taken along the line LL of FIG. 9 is a cross-sectional view taken along the line MM of FIG. In the second embodiment, it is a perspective view of the drainage structure in the state where the cover portion is removed. In the second embodiment, it is a perspective view of the drainage structure in the “uncovered state”. FIG. 2 is a cross-sectional view of a drainage structure in a “non-covered state” in the second embodiment. It is sectional drawing of the operation apparatus in 2nd Embodiment. In the third embodiment, it is sectional drawing of the drainage structure in a "cover state". In the third embodiment, it is a perspective view of the drainage structure in the “uncovered state”. FIG. 3 is a cross-sectional view of a drainage structure in a “non-covered state” in the third embodiment. It is sectional drawing of the drainage structure in another embodiment. In another embodiment, it is a cross-sectional view of a drainage structure in a “covered state”. In another embodiment, it is a cross-sectional view of a drainage structure in a “non-covered state”. In another embodiment, it is a cross-sectional view of a drainage structure in a “covered state”. In another embodiment, it is a sectional view taken along line NN of FIG. 21 showing only the support rotating unit. In another embodiment, it is a cross-sectional view of a drainage structure in a “non-covered state”. In another embodiment, it is a cross-sectional view of a drainage structure in a “covered state”. In another embodiment, it is a cross-sectional view of a drainage structure in a “non-covered state”. It is a perspective view of the cover part in another embodiment. It is a perspective view of the recess forming part and the like in another embodiment. It is a partially enlarged sectional view which shows the rotation drive part, the cover part, etc. in another embodiment.

Hereinafter, embodiments will be described with reference to the drawings.
[First Embodiment]
As shown in FIG. 1, the drainage structure 1 is provided in a bathroom washing place pan 100 (hereinafter, simply referred to as “washing place pan 100”) as an installation target portion. The drainage structure 1 includes a recess forming portion 102 formed in the washing place pan 100 in addition to the cover portion 4 and the like described later. Here, first, the configuration of the washing place bread 100 will be described.

As shown in FIGS. 2 and 3, the washing place pan 100 includes a floor base portion 101 and a recess forming portion 102. The floor base 101 is a portion that constitutes most of the washroom floor in the bathroom. Although not shown, most of the upper surface of the floor base 101 is provided with a gentle slope that gradually lowers toward the recess forming portion 102.

The recess forming portion 102 is recessed at a position adjacent to the bathtub (not shown), and includes a first hanging portion 103, an intermediate step portion 104, a second hanging portion 105, and a bottom portion 106.

The first hanging portion 103 hangs down from the floor base 101 and forms an annular shape having a rectangular shape in a plan view as a whole. The intermediate step portion 104 projects substantially horizontally from the lower end portion of the first hanging portion 103. The upper surface of at least a part of the intermediate step portion 104 has a shape that gradually lowers toward the drainage pipe 2 side in order to smoothly flow the drainage toward the drainage pipe 2 side, which will be described later. Further, flat surface-shaped receiving portions 104a are formed at two corners of the intermediate step portion 104 located on the opposite side of the bathtub.

The second hanging portion 105 hangs downward from the inner peripheral portion of the intermediate step portion 104 and has a cylindrical shape. The bottom portion 106 is a portion constituting the bottom of the recess forming portion 102, and projects horizontally from the lower end portion of the second hanging portion 105. Further, a drainage port 107 is formed through the central portion of the bottom portion 106 in the vertical direction.

In addition, the recess 108 that opens upward is formed by the internal space of the recess forming portion 102 surrounded by the first hanging portion 103, the intermediate step portion 104, the second hanging portion 105, and the bottom portion 106. Then, as described above, since the floor base 101 is provided with the inclination, the drainage naturally flows into the recess 108.

Next, a portion of the drainage structure 1 different from the recess forming portion 102 will be described. The drainage structure 1 includes a drainage pipe 2, an operation support unit 3, and a cover portion 4.

The drainage pipe 2 is a component that functions as an outflow path for drainage that has flowed into the recess 108. The drainage pipe 2 has a cylindrical shape as a whole, and has a flange portion 21 formed so as to protrude outward in the radial direction at one end (upper end portion) thereof and a male screw portion formed on the outer periphery below the collar portion 21. It has 22 and. Then, while inserting the drain pipe 2 into the drain port 107, the male screw portion 22 is screwed into a predetermined pipe (for example, a drain trap) (not shown), and the bottom portion 106 is sandwiched between the flange portion 21 and the pipe, whereby the drain pipe 2 is formed. It is connected to the bottom 106.

In the present embodiment, an annular sealing member 5 made of an elastically deformable material (for example, resin, rubber, etc.) is arranged between the collar portion 21 and the bottom portion 106. The seal member 5 prevents water leakage from between the drain pipe 2 and the bottom 106. Further, the outer peripheral surface of the collar portion 21 is arranged close to the second hanging portion 105 with almost no gap, and as a result, foreign matter and dirt are prevented from adhering between the collar portion 21 and the second hanging portion 105. It is planned.

The operation support unit 3 is a mechanism that includes an operation target for operating the cover unit 4 and functions as a support unit for the cover unit 4. The operation support unit 3 is arranged adjacent to the central portion (one side) of the first hanging portion 103 located on the bathtub side on the intermediate step portion 104 (see FIG. 4). As shown in FIGS. 2 to 4, the operation support unit 3 includes a case unit 31, a rotation drive unit 32, an operation unit 33, and a rotation regulation mechanism 34. In the present embodiment, the rotation drive unit 32 also corresponds to a “rotation support unit”.

The case portion 31 internally accommodates the intermediate portion of the rotation drive portion 32, the operation portion 33, and the rotation regulation mechanism 34, and also functions as an attachment portion of the operation support unit 3 to the recess forming portion 102. The case portion 31 is attached to the recess forming portion 102 by using a known attachment method such as screwing (however, the portion related to this attachment method is not shown). The case portion 31 is provided with a plurality of holes for exposing both ends of the rotation drive portion 32 and the pressed portion 33b described later to the outside of the case portion 31, and the rotation drive portion 32 can be rotated. I support it.

The rotation drive unit 32 rotates by supporting the cover unit 4 and applying a driving force generated by an operation on the operation unit 33 (in this embodiment, an operation force applied to the operation unit 33). .. The rotation drive unit 32 has a columnar shape as a whole, and both ends thereof are installed so as to project outside the case unit 31.

The rotation drive unit 32 includes a gear unit 32a, a first notch portion 32b, a second notch portion 32c, and a pair of connecting portions 32d. The gear portion 32a is formed in a certain range along the circumferential direction of the rotation drive portion 32, which is the outer circumference of the central portion in the longitudinal direction of the rotation drive portion 32, and is arranged in the case portion 31.

The first notch portion 32b and the second notch portion 32c are formed at positions of the rotation drive portion 32 slightly deviated from the gear portion 32a along the rotation axis direction of the rotation drive portion 32. The first notch portion 32b and the second notch portion 32c are located at positions separated by a predetermined distance along the circumferential direction of the rotation driving unit 32, respectively.

The connecting portion 32d is formed at the end portion in the longitudinal direction of the rotation driving portion 32, and when viewed along the rotation axis direction of the rotation driving portion 32, two parallel sides and two connecting these two sides are connected. It has a shape with an arc. The connecting portion 32d is connected to the cover portion 4. As a result, the cover portion 4 rotates with the rotation of the rotation drive portion 32.

The operation unit 33 functions as an operation target by the user when rotating the cover unit 4, that is, when switching to the “non-cover state” described later, and also applies the applied operating force to the rotation drive unit. It has a role of communicating to 32. The operation unit 33 is provided separately from the cover unit 4, and is inserted and installed in the case unit 31 in a state where it can be reciprocated in the vertical direction. The operation unit 33 includes a rack component 33a and a pressed unit 33b.

The rack configuration unit 33a includes a plurality of teeth arranged along the reciprocating movement direction of the operation unit 33, and is meshed with the gear unit 32a.

The pressed portion 33b is composed of one end surface (upper surface) of the operating portion 33 along the reciprocating movement direction thereof, and is exposed on the upper surface of the case portion 31. The pressed portion 33b is a portion to be pressed by the user when the cover portion 4 is rotated, and by pressing the pressed portion 33b, the operating portion 33 moves forward (downward), and as a result. , The rotation drive unit 32 rotates.

The rotation restricting mechanism 34 is a mechanism for maintaining the cover portion 4 in a stopped state in the “covered state” and the “non-covered state” described later, respectively. In the present embodiment, the rotation regulation mechanism 34 constitutes the "uncovered state maintaining means". The rotation restricting mechanism 34 includes a pin 34a and a pin pressing spring 34b.

The pin 34a is installed in the case portion 31 so as to be reciprocally movable, and the tip portion is configured to be dispositionable in the cutout portions 32b and 32c. The pin pressing spring 34b is provided in a compressed state, and is for pressing the pin 34a toward the outer circumference of the rotation driving unit 32.

The cover portion 4 is a component for covering the recess 108 and making all or most of the recess 108 (most of them in the present embodiment) hidden from the outside (invisible or difficult to see). As shown in FIG. 5, the cover portion 4 includes a cover main body portion 41 and a connected portion 42.

The cover main body 41 has a rectangular plate shape, and is a portion that mainly plays a role of hiding the recess 108 described above. A pair of leg portions 41a are formed so as to protrude from the back surface of the cover main body portion 41 (the surface located on the concave portion 108 side) and located on the side opposite to the rotation axis of the cover portion 4 described later.

The connected portion 42 is formed so as to protrude from the back surface at the central portion on the edge side of the cover main body portion 41, and includes a connecting slit 42a in which the connecting portion 32d is arranged. Then, by inserting the connecting portion 32d into the connecting slit 42a, the cover portion 4 is connected to the connecting portion 32d in a non-rotatable state. As a result, the cover portion 4 is rotatably supported by a rotation shaft (in this embodiment, the rotation shaft of the rotation drive unit 32) located on the outer edge side of the cover portion 4. There is.

Further, in the present embodiment, by moving the cover portion 4 so that the connecting portion 32d is pulled out from the connecting slit 42a, the cover portion 4 can be removed from the connecting portion 32d without using a special tool or the like. It has become. Therefore, the cover portion 4 is detachable from the rotation drive portion 32. By removing the cover portion 4, it is possible to easily clean the cover portion 4 and the recess forming portion 102.

By the way, in the drainage structure 1 described above, by arranging the cover portion 4 at the position covering the recess 108 (the position where the opening of the recess 108 is closed), all or most of the recess 108 is hidden from the outside. It can be in the “cover state” (see FIGS. 1 to 3). In the present embodiment, in the "cover state", the outer edge of the cover main body 41 located on the opposite side of the operation support unit 3 and the two parallel outer edges orthogonal to the outer edge are the first hanging 103. It is installed close to the inner surface of the above, and the function of hiding the recess 108 is more effectively exhibited.

Further, in the "cover state", the surface of the cover portion 4 and the surface of the floor base portion 101 (particularly the surface located on the cover portion 4 side) are substantially flush with each other (almost the same height), and the aesthetic appearance is improved. At the same time, the cover portion 4 is configured so as not to be an obstacle for the user who uses the bathroom (see FIGS. 2 and 3).

Further, in the "cover state", the tip portion of the lock pin 34a is arranged in the first missing portion 32b, so that the rotation of the rotation driving portion 32 and the cover portion 4 is restricted, and the cover portion 4 is restricted. Is to be maintained in a stopped state. Then, in the "cover state", the cover portion 4 and the recess forming portion 102 do not come into contact with each other. In the present embodiment, even in the "non-covered state", the cover portion 4 and the recess forming portion 102 do not come into contact with each other. However, in the present embodiment, when a large downward force is applied to the cover portion 4 by stepping on the cover portion 4 or placing a heavy object on the cover portion 4 in the "cover state". The cover portion 4 rotates slightly, and the leg portion 41a comes into contact with the intermediate step portion 104 (receiving portion 104a). As a result, the load applied to the supported portion side of the cover portion 4 and the rotation drive portion 32 can be reduced, and damage or deformation of the cover portion 4 or the like can be more reliably prevented.

On the other hand, in the "cover state", by pressing the pressed portion 33b, the tip portion of the lock pin 34a is released from the first missing portion 32b, and the cover portion 4 is on the outer edge opposite to the rotation axis. As a result, the state of covering the recess 108 is released. As a result, it is possible to switch from the "covered state" to the "non-covered state" (see FIGS. 5 to 7) in which all or most of the recesses 108 (most of them in the present embodiment) are visible from the outside. it can. Then, in the "non-covered state", the tip of the lock pin 34a is arranged in the second notch 32c, so that the rotation of the rotation driving unit 32 and the cover portion 4 is restricted, and the cover portion 4 is restricted. Will be maintained in a stopped state.

Further, in the present embodiment, the rotation drive portion 32 (connecting portion 32d) and the connected portion 42 (connecting slit 42a) are provided so that the cover portion 4 cannot be removed from the recess 108 in the “cover state”. It is configured.

In the present embodiment, for example, by pushing the surface of the cover portion 4 or the like, the cover portion 4 is rotated so that the outer edge opposite to the rotation shaft is lowered, so that the cover portion 4 is released from the “non-covered state”. It is possible to switch to the "cover state".

Further, in the present embodiment, drainage can flow into the recess 108 in both the "covered state" and the "uncovered state" (in either the "covered state" or the "uncovered state"). There is. That is, unlike the plug lid provided in a bathtub or the like, the cover portion 4 does not have a function of switching between a drainable state and a drainable state.

As described in detail above, according to the present embodiment, it is possible to switch to the "covered state" or the "non-covered state" by rotating the cover portion 4. Therefore, when switching to the "covered state" or the "non-covered state", it is necessary to lift and move the cover portion 4 and place it in the recess 108, or to remove the cover portion 4 from the recess 108 and then lift and move it. Is gone. As a result, it is possible to easily switch to the "covered state" or the "non-covered state", and the convenience for the user can be enhanced.

Further, since it is not necessary to remove the cover portion 4 when switching to the "covered state" or the "non-covered state", it is more reliable to prevent the removed cover portion 4 from being placed on the washing place pan 100 or its peripheral portion. it can. Therefore, it is possible to suppress a situation in which dirt or foreign matter on the cover portion 4 adheres to the portion on which the cover portion 4 is placed, and it is possible to improve hygiene and cleanability.

In addition, the rotation restricting mechanism 34 makes it possible to maintain the cover portion 4 in the stopped state and maintain the "non-covered state" without using a hand or the like. Therefore, it becomes possible to more easily remove the foreign matter existing in the recess 108, clean the recess forming portion 102, and the like, which further enhances the convenience for the user.

Further, by operating the operation unit 33, it is possible to switch to the “uncovered state”. Therefore, when switching to the "non-covered state", it is not necessary to directly touch the cover portion 4 to which dirt or foreign matter easily adheres, and hygiene and safety can be improved.

Further, since the cover portion 4 and the recess forming portion 102 do not come into contact with each other in the "cover state", it is possible to more reliably prevent a situation in which a foreign matter is caught and stays at the contact portion between the cover portion 4 and the recess contact portion 102. As a result, it is not necessary to separately remove such foreign matter at the time of cleaning, and the convenience for the user can be further improved. Further, it is possible to prevent the flow of wastewater from being obstructed, and it is possible to obtain better drainage performance.

In addition, the cover portion 4 is detachable from the rotation drive portion 32. Therefore, the cover portion 4 can be removed from the rotation drive portion 32, and the cover portion 4 can be cleaned as a single unit, and the convenience can be further improved. Further, if the cover portion 4 is damaged or the like, it is possible to make it easier to deal with the damage or the like (for example, repair or replacement work of the cover portion 4). Further, it is possible to appropriately change and use the cover portion 4 having a different color, design, etc. according to the surrounding environment of the drainage structure 1 and the needs of the user.

At the same time, since the cover portion 4 cannot be removed from the recess 108 in the "cover state", it is possible to prevent the cover portion 4 from floating and coming off from the recess 108 due to the influence of drainage or the like. Further, it is not necessary to increase the weight of the cover portion 4 in order to prevent the cover portion 4 from coming off from the recess 108, and the weight of the cover portion 4 can be reduced.
[Second Embodiment]
Next, the second embodiment will be described. In the second embodiment, as shown in FIG. 8, the drainage structure 11 is provided in the kitchen sink 110 (hereinafter, simply referred to as “sink 110”) as an installation target portion. The drainage structure 11 includes a recess forming portion 112 formed in the sink 110 in addition to the cover portion 17 and the like described later. Here, first, the configuration of the sink 110 will be described.

The sink 110 includes a base 111 and a recess forming portion 112. The base 111 is a portion that constitutes most of the bottom of the sink 110. Although not shown, most of the upper surface of the base 111 is provided with a gentle slope that gradually lowers toward the recess forming portion 112.

As shown in FIG. 9, the recess forming portion 112 includes a first hanging portion 113, an intermediate step portion 114, a second hanging portion 115, and a bottom portion 116. The first hanging portion 113, the intermediate step portion 114, the second hanging portion 115, and the bottom portion 116 are substantially the same as the first hanging portion 103, the intermediate step portion 104, the second hanging portion 105, and the bottom portion 106 in the first embodiment. It has a configuration. However, in the second embodiment, a mounting hole 113a for installing the support rotation unit 16 described later is formed through the first hanging portion 113. Further, in the "cover state", a large downward force is applied to the cover portion 17 described later in the "cover state" at the portions of the first hanging portion 113 corresponding to the two corners of the intermediate step portion 114, and the cover portion 17 rotates slightly. In this case, a receiving portion 113b that comes into contact with the cover portion 17 and supports it is formed.

A recess 118 that opens upward is formed by the first hanging 113, the intermediate step 114, the second hanging 115, and the bottom 116, and as described above, the base 111 is provided with the inclination. The drainage naturally flows into the recess 118. Further, a drainage port 117 is formed through the bottom portion 116 as in the first embodiment.

Next, a portion of the drainage structure 11 different from the recess forming portion 112 will be described. The drainage structure 11 includes a drainage pipe 12, a foreign matter collecting portion 13 (not shown in FIGS. 11 and 12), an operating device 14 (see FIG. 14), a transmission member 15, a support rotating unit 16, and a cover portion 17. ..

The drainage pipe 12 has the same function as the drainage pipe 2 in the first embodiment, and includes a flange portion 12a and a male screw portion 12b (screw shape is not shown in FIG. 9 and the like). Then, as in the first embodiment, the drainage pipe 12 is connected to the bottom 116 by using a pipe (for example, a drainage trap) (not shown). Although not shown, seal members are provided between the collar portion 12a and the bottom portion 116 and between the pipe 12 and the bottom portion 116 to prevent water leakage.

The foreign matter collecting unit 13 is installed and used in the recess 118, and collects foreign matter (dust, etc.) that has flowed into the recess 118. The foreign matter collecting portion 13 includes a housing portion 13a and a mounting collar portion 13b.

The accommodating portion 13a is a portion where foreign matter is accumulated inside, and has a cage shape in which a large number of water passage holes (not shown) are formed through. The mounting collar portion 13b has a collar shape that protrudes outward from the upper end portion of the accommodating portion 13a.

In the second embodiment, in the foreign matter collecting portion 13, the accommodating portion 13a is usually housed inside the second hanging portion 115, and the mounting collar portion 13b is mounted on the recess forming portion 112 (intermediate step portion 114). When it is placed, it is installed in the recess 118. However, when cleaning the foreign matter collecting portion 13, the foreign matter collecting portion 13 can be removed to the outside of the recess 118 by lifting the foreign matter collecting portion 13 and moving it to the outside of the recess 118. is there.

The operation device 14 is a device provided with an operation target for rotating the cover portion 17. As shown in FIG. 14, the operation device 14 is a portion slightly separated from the cover portion 17 [in the present embodiment, a portion of the kitchen counter 119 near a water discharge device (not shown) that supplies water to the sink 110. ] Is installed. The operation device 14 includes a rod-shaped operation unit 14a that can be reciprocated.

The operation unit 14a is a portion to be operated by the user when the cover unit 17 is rotated, that is, when switching to the “covered state” or the “non-covered state”. A transmission member 15 is connected to the end of the operation unit 14a, and the transmission member 15 can reciprocate as the operation unit 14a reciprocates.

The transmission member 15 transmits the driving force generated by the operation on the operation unit 14a (in the second embodiment, the operation force applied to the operation unit 14a) to the cover unit 17 side. The transmission member 15 is made of, for example, a metal wire or the like, and is arranged in a state where it can be reciprocated around the inner circumference of the tubular tube member 18 as shown in FIG. One end of the tube member 18 is attached to a support rotation unit 16 (tube holding member 165 described later). On the other hand, the other end of the tube member 18 is attached to the operating device 14 (see FIG. 14).

The support rotation unit 16 is a mechanism for rotating the cover portion 17 by utilizing the driving force applied from the operation portion 14a (transmission member 15) side while supporting the cover portion 17 in a rotatable state. .. The support rotating unit 16 is installed in the central portion (one side) of the first hanging portion 113, which is located on the back side when viewed from the kitchen user (see FIG. 11). As shown in FIGS. 9 to 11, the support rotation unit 16 includes a case portion 161, a rotation drive portion 162, a stopped state maintenance portion 163, a terminal transmission portion 164, and a tube holding member 165. In the present embodiment, the rotation drive unit 162 also corresponds to a “rotation support unit”.

The case portion 161 internally accommodates an intermediate portion of the rotation drive portion 162, a stopped state maintenance portion 163, and the like, and functions as a mounting portion of the support rotation unit 16 to the recess forming portion 112. The case portion 161 includes a recessed portion 161a and a mounting hole arranging portion 161b.

The recessed portion 161a is a portion that accommodates the rotation driving unit 162, the stopped state maintaining portion 163, and the like, and is arranged in the recessed 118. A predetermined through hole is formed in the recessed arrangement portion 161a, and both ends of the rotation driving portion 162 project out of the case portion 161 through the through hole.

The mounting hole arranging portion 161b has a cylindrical shape formed so as to protrude from the recessed arranging portion 161a, and is a portion that accommodates the tube holding member 165 and is inserted and arranged in the mounting hole 113a. A predetermined male screw is formed on the outer circumference of the mounting hole arranging portion 161b. Then, the male screw is screwed into the female screw formed on the inner circumference of the predetermined nut member 166, and the recess forming portion 112 is sandwiched between the recess arranging portion 161a and the nut member 166 so that the support rotation unit is supported. 16 is attached to the recess forming portion 112. A seal member 19 is provided between the recess arranging portion 161a and the recess forming portion 112 to prevent water leakage through the mounting hole 113a.

The rotation drive unit 162 supports the cover unit 17 and is rotated by applying a drive force generated by an operation on the operation unit 14a (in the second embodiment, an operation force applied to the operation unit 14a). Move. The rotation drive unit 162 is supported in a rotatable state by a case unit 161 (recessed arrangement portion 161a), and includes a gear portion 162a and a pair of connecting portions 162b.

The gear portion 162a is formed in a certain range along the circumferential direction of the rotation drive unit 162, which is the outer periphery of the central portion in the longitudinal direction of the rotation drive unit 162. In the second embodiment, the portion of the rotary drive unit 162 in which the gear portion 162a is formed has a smaller diameter than the portion of the rotary drive unit 162 adjacent to the gear portion 162a. This is to prevent the rotation drive unit 162 from being pulled out from the case unit 161 by interacting with the terminal transmission unit 164.

The connecting portion 162b is formed at the end portion in the longitudinal direction of the rotation driving portion 162, and is parallel to each other when viewed along the rotation axis direction of the rotation driving portion 162, as in the first embodiment. It has a shape with a side and two arcs connecting these two sides. The connecting portion 162b is connected to the cover portion 17. As a result, the cover portion 17 rotates with the rotation of the rotation drive portion 162.

The stopped state maintaining unit 163 is a portion for preventing the rotation driving unit 162 from rotating extremely easily and maintaining the rotation driving unit 162 and thus the cover unit 17 in the stopped state. In the second embodiment, the stopped state maintaining portion 163 is made of resin, rubber, or the like, and is composed of a plurality of (two) O-rings attached to the outer periphery of the rotation driving portion 162. The stopped state maintenance unit 163 is sandwiched between the case unit 161 and the rotation drive unit 162, and the rotation drive unit 162 and the cover unit 162 utilize the frictional force generated between the stop state maintenance unit 163 and the case unit 161 and the like. 17 is maintained in a stopped state at an arbitrary rotation angle.

In the second embodiment, an O-ring is used to more reliably maintain the stopped state of the cover portion 17, but emphasis is placed on the smoothness of rotation of the rotation drive portion 162 and the cover portion 17. If this is the case, an X-ring may be used. In the second embodiment, the stopped state maintaining unit 163 corresponds to a "non-covered state maintaining means" capable of maintaining the cover unit 17 in a stopped state at a plurality of types of rotation angles.

Further, in the second embodiment, the stopped state maintaining portion 163 also has a function of preventing water from entering the mounting hole arranging portion 161b and preventing water leakage through the mounting hole arranging portion 161b.

The end transmission unit 164 is connected to the end portion of the transmission member 15, and transmits the driving force (operating force) transmitted from the operation unit 14a via the transmission member 15 to the rotation driving unit 162. The end transmission portion 164 is installed in a recessed arrangement portion 161a in a state where it can be reciprocated, and reciprocates with the reciprocating movement of the transmission member 15. Further, the terminal transmission portion 164 includes a plurality of teeth arranged along the reciprocating movement direction thereof, and these teeth are meshed with the gear portion 162a. As a result, by reciprocating the operation unit 14a, the transmission member 15 and the terminal transmission unit 164 reciprocate, and as a result, the rotation drive unit 162 rotates.

The tube holding member 165 is a component that is attached to the case portion 161 while holding one end portion of the tube member 18. The tube holding member 165 has a cylindrical shape, and is inserted into the inner circumference of the mounting hole arranging portion 161b while holding the tube member 18 on its own inner circumference. The tube holding member 165 is in a state of being held out from the mounting hole arranging portion 161b by a predetermined retaining member 167 attached to the end of the mounting hole arranging portion 161b.

The cover portion 17 is a component for covering the recess 118 and making all or most of the recess 118 (most of them in the second embodiment) hidden from the outside (invisible or difficult to see). .. As shown in FIG. 12, the cover portion 17 includes a cover main body portion 171 and a connected portion 172.

The cover main body portion 171 has a rectangular plate shape, and is a portion that mainly plays a role of hiding the above-mentioned recess 118. In the second embodiment, unlike the first embodiment, the cover main body 171 is not provided with the legs, but of course, the cover main body 171 may be provided with the legs.

The connected portion 172 is formed so as to protrude from the back surface at the central portion on the edge side of the cover main body portion 171 and includes a connecting slit 172a in which the connecting portion 162b is arranged. Then, by inserting the connecting portion 162b into the connecting slit 172a, the cover portion 17 is connected to the connecting portion 162b in a non-rotatable state. As a result, the cover portion 17 is rotatably supported by a rotation shaft (in this embodiment, the rotation shaft of the rotation drive unit 162) located on the outer edge side of the cover portion 17. There is.

Further, also in the second embodiment, by moving the cover portion 17 so that the connecting portion 162b is pulled out from the connecting slit 172a, the cover portion 17 can be taken from the connecting portion 162b without using a special tool or the like. It is possible to go outside. Therefore, the cover portion 17 is detachable from the rotation drive portion 162.

By the way, in the drainage structure 11 configured as described above, the position where the cover portion 17 covers the recess 118 (the position where the opening of the recess 118 is substantially closed) when the operation portion 14a is reactivated (upward). The recess 118 can be placed in a "cover state" (see FIG. 8) in which all or most of the recess 118 is hidden from the outside. In the second embodiment, as in the first embodiment, in the "cover state", the outer edge of the cover main body 171 located on the opposite side of the support rotation unit 16 is parallel to the outer edge. The two outer edges are installed close to the inner surface of the first hanging portion 113, so that the function of hiding the recess 118 is more effectively exhibited.

Further, in the "cover state", the surface of the cover portion 17 and the surface of the base portion 111 (particularly the surface located on the cover portion 17 side) are substantially flush with each other (almost the same height) so that the aesthetic appearance can be improved. (See FIGS. 9 and 10).

Further, in the "cover state", the cover unit 17 is maintained in the stopped state by the stopped state maintaining unit 163. Then, in the "cover state", the cover portion 17 and the recess forming portion 112 are configured so as not to come into contact with each other.

In addition, the rotation drive portion 162 (connecting portion 162b) and the connected portion 172 (connecting slit 172a) are configured so that the cover portion 17 cannot be removed from the recess 118 in the “cover state”. ..

On the other hand, in the "cover state", by moving the operation unit 14a forward (downward), the rotation drive unit 162 rotates against the frictional force generated by the stop state maintenance unit 163 and the like, and the cover unit 17 Rotates so that the outer edge on the side opposite to the rotation axis rises. As a result, the state of covering the recess 118 is released, and from the "cover state", the "non-cover state" in which all or most of the recess 118 (mostly in the second embodiment) is visible from the outside. (See FIGS. 12 and 13). Even in the "non-covered state", the cover unit 17 can be maintained in the stopped state by the stopped state maintaining unit 163.

Further, the switching from the "non-covered state" to the "covered state" is performed by removing the operation unit 14a and rotating the cover unit 17 so that the outer edge on the side opposite to the rotation shaft descends. It can be carried out. It should be noted that the "non-covered state" can be switched to the "covered state" by directly operating the cover unit 17.

In addition, in the second embodiment, since the stop state maintaining portion 163 is provided, the cover portion is provided in the “non-covered state” by adjusting the stop position of the operation portion 14a and the stop angle of the cover portion 17. 17 can be maintained in a stopped state at a plurality of types of rotation angles. Thereby, in the "uncovered state", it is possible to maintain the degree of opening of the gap formed between the recess forming portion 112 and the cover portion 17 to a plurality of different degrees. In particular, in the second embodiment, the stop angle of the cover portion 17 can be adjusted continuously rather than stepwise, and the degree of opening can be arbitrarily adjusted. Further, in the second embodiment, the stop angle of the cover portion 17 can be adjusted with the cover portion 17 as an operation target. By targeting the cover portion 17 as an operation target, it is possible to finely adjust the stop angle of the cover portion 17.

In the second embodiment as well, as in the first embodiment, in both the "covered state" and the "uncovered state" (in either the "covered state" or the "non-covered state"), Drainage can flow into the recess 118. That is, the cover portion 17 does not have a function of switching between a drainable state and a drainable state.

As described above, according to the second embodiment, basically, the same effects as those of the first embodiment are exhibited.

In addition, in the second embodiment, the operation unit 14a can be operated to switch to the “covered state” or the “non-covered state”. Therefore, when switching to the "covered state" or the "non-covered state", it is not necessary to directly touch the cover portion 17 to which dirt or foreign matter easily adheres, and hygiene and safety can be further improved.

Further, according to the second embodiment, the stop state maintaining portion 163 enables the cover portion 17 to be maintained in the stopped state at a plurality of types of rotation angles. Therefore, the degree of opening of the gap formed between the recess forming portion 112 and the cover portion 17 can be maintained at a plurality of different degrees. As a result, for example, by stopping the cover portion 17 in a state where a slight gap is formed, the recess 118 becomes visible from the outside to some extent, but the recess 118 is hidden to some extent by the cover portion 17 and becomes the recess 118. It is possible to allow dust and drainage to flow in more smoothly, and to maintain the inside of the recess 118 in a relatively dry state without significantly impairing the aesthetic appearance. Therefore, the width according to the usage of the drainage structure 11 can be widened as compared with the configuration in which the rotation angle of the cover portion 17 in the “non-covered state” cannot be adjusted. As a result, the convenience for the user can be further improved.

Further, since the operation device 14 (operation unit 14a) is provided on the counter 119 of the kitchen, the operation device 14 (operation unit 14a) can be switched to the “covered state” or the “non-covered state” as compared with the case where the cover unit 17 is the operation target. The operability can be further improved. Further, since the operation device 14 (operation unit 14a) is provided at a portion of the kitchen counter 119 where normal drainage does not reach, hygiene and safety can be further improved.
[Third Embodiment]
Next, the third embodiment will be described focusing on the differences from the second embodiment. As shown in FIG. 15, in the third embodiment, the foreign matter collecting portion 13 includes an arm portion 13c in addition to the accommodating portion 13a and the mounting collar portion 13b.

The arm portion 13c has a U-shape and is attached to the mounting collar portion 13b in a state of being rotatable with respect to the accommodating portion 13a and the mounting collar portion 13b. However, although the arm portion 13c is rotatable, it does not lie horizontally and is raised to some extent (for example, about 30 ° with respect to the horizontal plane) (the state shown in FIG. 15). It is configured so that movement is regulated. Further, the arm portion 13c is relatively thin made of resin or metal and can be elastically deformed.

Further, in the third embodiment, a locking portion 171a is provided on the back surface of the cover portion 17 (cover main body portion 171). The locking portion 171a is formed so as to project downward from the back surface (the surface on the concave portion 118 side) of the cover main body portion 171 and includes a protrusion at the tip portion (lower end portion) to which the arm portion 13c is locked. There is. The locking portion 171a is arranged above the accommodating portion 13a in the "covered state" and is configured so as not to enter the accommodating portion 13a.

Then, in the third embodiment, the arm portion 13c locked to the protrusion of the locking portion 171a is rotated by rotating the cover portion 17 so as to switch from the “covered state” to the “non-covered state”. Moves up. As a result, as shown in FIGS. 16 and 17, the foreign matter collecting portion 13 is lifted in conjunction with the cover portion 17, and the lifted foreign matter collecting portion 13 can be easily removed from the recess 118. It becomes a state. In the third embodiment, the foreign matter collecting portion 13 (arm portion 13c) is locked by the locking portion 171a in the “uncovered state”, so that the foreign matter collecting portion 13 can be maintained in a lifted state. A "collecting part holding means" is configured.

In addition, in the third embodiment, the mounting collar portion 13b is placed on the intermediate stage portion 114 in the “uncovered state”, and the foreign matter collecting portion 13 is installed in the recess 118 (locked in this state). The arm portion 13c is not locked to the portion 171a), and when the cover portion 17 is rotated to switch from the “uncovered state” to the “covered state”, the arm portion 13c and the locking portion 171a are slightly elastic. It is configured so that the locking portion 171a (the protrusion) is naturally locked to the arm portion 13c by being deformed. Therefore, for example, after cleaning the foreign matter collecting portion 13, the foreign matter collecting portion 13 is installed in the recess 118, and then the cover portion 17 is rotated to switch from the “uncovered state” to the “covered state”. The arm portion 13c is naturally locked to the stop portion 171a (the protrusion). Therefore, when the cover portion 17 is rotated to switch from the "covered state" to the "non-covered state" next time, the foreign matter collecting portion 13 is lifted in conjunction with the cover portion 17.

As described above, according to the third embodiment, basically, the same effects as those of the second embodiment are exhibited.

In addition, in the third embodiment, by rotating the cover portion 17 so as to switch from the “covered state” to the “non-covered state”, the foreign matter collecting portion 13 is raised in conjunction with the cover portion 17. Can be lifted. Therefore, when it is desired to remove the foreign matter collecting portion 13 to the outside of the recess 118 when removing the foreign matter accumulated in the foreign matter collecting portion 13 or cleaning the foreign matter collecting portion 13, the cover portion 17 is rotated. It is necessary to set the "non-covered state", but in the third embodiment, if the cover portion 17 is rotated so as to be in the "non-covered state", the foreign matter collecting portion 13 is naturally moved to the outside of the recess 118. It can be made easy to remove. As a result, the foreign matter collecting unit 13 can be very easily removed, and the convenience can be further improved.

Further, when removing the foreign matter collecting portion 13, it is more reliable to prevent the user from touching the installation portion of the foreign matter collecting portion 13 (intermediate stage portion 114 in the third embodiment) and its peripheral portion. It is possible to obtain better hygiene and safety.

Further, in the "non-covered state", the locking portion 171a can maintain the foreign matter collecting portion 13 in a lifted state (a state in which the foreign matter collecting portion 13 is floated from the installation site). Therefore, when it is desired to dry the cover portion 17, the recess forming portion 112, the foreign matter collecting portion 13, and the like, it is possible to dry the foreign matter collecting portion 13 by floating the foreign matter collecting portion 13 with the cover portion 4 in the “uncovered state”. It is easily possible. Further, when the foreign matter collecting portion 13 is placed around the drainage structure 11 and dried, it is necessary to secure a place for the foreign matter collecting portion 13, but according to the third embodiment, this is necessary. Therefore, the convenience for the user can be further improved.

Further, when the cover portion 17 is rotated to switch from the “non-covered state” to the “covered state”, the arm portion 13c is naturally locked to the locking portion 171a (the protrusion), so that the user It is not necessary to lock the arm portion 13c to the locking portion 171a, and the convenience for the user can be further enhanced.

Further, the locking portion 171a is arranged above the accommodating portion 13a in the "covered state" so as not to enter the accommodating portion 13a. Therefore, it is possible to more reliably prevent the locking portion 171a from coming into contact with the foreign matter stored in the accommodating portion 13a, and it is possible to further improve hygiene and cleanability.

The content is not limited to the description of the above embodiment, and may be implemented as follows, for example. Of course, other application examples and modification examples not illustrated below are also possible.

(A) The method of rotating the cover portion 17 by using the operation device 14 and the transmission member 15 described in the second embodiment may be applied to the configuration of the first embodiment. For example, as shown in FIG. 18, the end transmission unit 35 connected to the transmission member 15 is configured to mesh with the gear portion 32a of the rotation drive unit 32, and the transmission member is operated as the operation unit 14a is operated. The cover portion 4 may be configured to rotate by reciprocating the 15 and the terminal transmission portion 35. In this example, the mounting hole 104b for installing the device is formed through the intermediate step portion 104, and although not shown, a seal member for preventing water leakage through the mounting hole 104b is provided. It is installed separately.

(B) In the above embodiment, the operation units 33 and 14a are provided as the operation targets when the cover portions 4 and 17 are rotated, but the cover portion itself covers the cover portion without providing the operation portion. It may be configured to be an operation target when rotating.

(C) Although not described in the above embodiment, it may be configured to switch to the "covered state" or the "non-covered state" each time the cover portion 4 is pressed. For example, as shown in FIG. 19, by providing the rack 36, the spring 37, the engaging teeth 38, and the sliding teeth 39, the cover portion 4 is switched to the “covered state” or the “non-covered state” each time the cover portion 4 is pressed. It may be configured as follows. The rotation drive unit 32 in this example has substantially the same configuration as that of the first embodiment, but does not include the notch portions 32b and 32c. Further, in this example, the rotation regulation mechanism 34 is not provided.

The rack 36 is configured to be reciprocally movable in the case portion 31, and is meshed with the gear portion 32a. Further, on the outer circumference of the rack 36, a ring 36a, which is an annular component having a pair of protrusions protruding outward, is arranged in a rotatable state. The spring 37 applies an urging force to the rack 36 in the forward (downward) direction. The engaging teeth 38 are provided with a plurality of ridges extending along the reciprocating movement direction of the rack 36 along the circumferential direction while being spaced apart from each other. The protrusion of the ring 36a can be engaged with the upper end of the engaging tooth 38, and the distance between the engaging teeth 38 (protrusions) is set to a size that allows the protrusion of the ring 36a to pass through. ing. When the rack 36 is relocated (upward), the sliding teeth 39 come into contact with the protrusion of the ring 36a to rotate the ring 36a by a predetermined amount.

In this example, in the "cover state", the protrusion of the ring 36a is pressed against the upper end of the engaging tooth 38 by the urging force applied from the spring 37 to the rack 36 to be engaged. As a result, the cover portion 4 is locked in a state where rotation is restricted against the urging force applied from the spring 37 (see FIG. 19). In this example, the spring 37 applies an urging force in the direction of switching from the “covered state” to the “non-covered state” to the cover portion 17, and corresponds to the “urging means”. On the other hand, the engaging teeth 38 and the ring 36a lock the cover portion 4 in a state where rotation is restricted against the urging force applied from the spring 37, and correspond to "locking means".

Then, in the "cover state", when the surface of the cover portion 4 located on the side opposite to the rotation axis is pressed, the rack 36 is slightly relocated (upward) to cause the protrusion of the ring 36a. The portion comes into contact with the sliding tooth 39. As a result, the ring 36a rotates by a predetermined amount. Then, when the pressure on the surface of the cover portion 4 is released, the ring 36a rotates by a predetermined amount, and the protrusion portion of the ring 36a falls between the engaging teeth 38 due to the urging force from the spring 37. The cover portion 4 is unlocked by the engaging teeth 38 and the ring 36a, and the rack 36 moves forward (downward). As a result, the rotation drive unit 32 and the cover unit 4 rotate to switch to the “uncovered state” (see FIG. 20). Therefore, in this example, the lock of the cover portion 4 can be released without directly touching the means for locking the cover portion 4 (engagement teeth 38 and the ring 36a).

In the "non-covered state", the cover portion 4 is locked by the engaging teeth 38 and the ring 36a by pushing the surface of the cover portion 4 to switch from the "non-covered state" to the "covered state". , The "covered state" will be maintained.

According to the configuration as in the above example, since the cover portion 4 is locked, it is possible to more reliably prevent a situation in which the cover portion 4 unintentionally rotates and the "cover state" is released. ..

Further, by releasing the lock of the cover portion 4, it is possible to switch from the "covered state" to the "uncovered state" by the urging force applied from the spring 37. Therefore, it is not necessary for the user to apply a force for switching from the "covered state" to the "non-covered state" on the cover portion 4. As a result, it is possible to switch from the "covered state" to the "non-covered state" more easily, and the convenience for the user can be further improved.

Further, by pressing the cover portion 4, the lock of the cover portion 4 by the means can be released without directly touching the means for locking the cover portion 4. Therefore, the lock of the cover portion 4 can be released relatively easily.

(D) In the above embodiment, the rotation driving units 32 and 162 are configured to rotate by the operating force applied to the operating units 33 and 14a. On the other hand, the energization operation unit such as a motor may be provided, and the rotation drive unit may be configured to rotate by the force generated in the energization operation unit triggered by the operation on the operation unit.

Further, a power generating unit such as a spring may be provided, and the rotation driving unit may be configured to rotate by the force generated by the power generating unit triggered by an operation on the operating unit. This configuration can be realized, for example, by using the support rotation unit 6 as shown in FIGS. 21 and 22.

The support rotation unit 6 includes a case portion 61, a rotation drive portion 62, a spring cover 63, a coil spring 64 as a power generating portion, and a pressing operation portion 65. The case portion 61 is formed by combining a plurality of parts, and a recess is formed in a state where a portion other than the connecting portion 62a described later in the rotation drive portion 62, a spring cover 63, and a coil spring 64 are housed inside. It is attached to the portion 102. In this example, the case portion 61 is attached to the recess forming portion 102 by being inserted into the mounting hole 104b formed through the intermediate step portion 104 and by screwing a predetermined nut member 66 around the mounting hole 104b. There is. Although not shown, a seal member for preventing water leakage through the mounting hole 104b is separately installed. Further, inside the case portion 61, a columnar one-end side connecting portion 61a to which one end of the spring cover 63 and the coil spring 64 is attached is formed.

The rotation drive unit 62 is supported by the case unit 61 in a rotatable state. In this example, the rotation drive unit 62 is configured by connecting two parts in series along the direction of the rotation axis. Further, in this example, only one end portion of the rotation drive portion 62 is provided with a connecting portion 62a having the same configuration as the connecting portions 32d and 162b in the above embodiment, and the connecting portion 62a is a cover portion 4 ( It is connected to one of the connected portions 42). The other connected portion 42 of the cover portion 4 is supported by the case portion 61. On the other hand, the other end of the rotation drive portion 62 has a columnar shape and is supported by the case portion 61. Further, the rotation drive unit 62 is a columnar shape in which the other end of the coil spring 64 is attached at a position shifted from the rotation shaft to the side opposite to the one end side connection portion 61a along the radial direction thereof. The end side connecting portion 62b is provided.

The spring cover 63 is provided from below the coil spring 64 to the side, and has an L shape in a cross section orthogonal to the central axis of the coil spring 64. One end of the spring cover 63 is attached in a state of being rotatable with respect to the one end side connection portion 61a with the central axis of the one end side connection portion 61a as a rotation axis.

One end of the coil spring 64 is attached to the one end side connection portion 61a, and the other end portion is attached to the other end side connection portion 62b, and the coil spring 64 is installed in a state of being extended beyond its natural length. In the "cover state", the central axis of the coil spring 64 overlaps with the rotation axis when viewed in the direction of the rotation axis of the rotation drive unit 62. As a result, in the "cover state", the rotation drive unit 62 is prevented from rotating due to the urging force from the coil spring 64. On the other hand, when the central axis of the coil spring 64 is deviated from the rotation axis when viewed in the direction of the rotation axis of the rotation drive unit 62, the coil spring 64 joins the rotation drive unit 62. The rotation drive unit 62 can be rotated by the force.

The pressing operation unit 65 is connected to the end portion of the transmission member 15, and is capable of reciprocating movement as the transmission member 15 reciprocates. In this example, the transmission member 15 reciprocates with the reciprocating movement of the operation unit 14a, as in the second embodiment. The pressing operation unit 65 has a function of pressing the spring cover 63 by the tip portion thereof to rotate the spring cover 63. A seal member 65a for preventing water leakage is provided on the outer periphery of the pressing operation portion 65.

The support rotation unit 6 configured as described above operates as follows. That is, in the "cover state" (see FIG. 21), when the operation unit 14a is operated to move the transmission member 15 forward, the pressing operation unit 65 moves forward (upward), and as a result, the pressing operation unit 65 causes the pressing operation unit 65 to move forward. The spring cover 63 is pressed upward. As a result, the spring cover 63 rotates about the one end side connecting portion 61a. Further, the coil spring 64 rotates in the same manner so as to be pushed by the spring cover 63. Then, as the coil spring 64 rotates, the central axis of the coil spring 64 deviates from the rotation axis when viewed in the direction of the rotation axis of the rotation drive unit 62, so that the coil spring 64 The rotation drive unit 62 rotates due to the urging force from. As a result, the cover portion 4 connected to the rotation drive portion 62 (connecting portion 62a) rotates to switch from the “covered state” to the “non-covered state” (see FIG. 23).

On the other hand, in the "uncovered state", the surface of the cover portion 4 is pressed to rotate the cover portion 4 against the urging force applied from the coil spring 64, so that the "uncovered state" is changed to the "covered state". Can be switched to. By switching from the "non-covered state" to the "covered state", the spring cover 63, the coil spring 64, the pressing operation unit 65, and the like return to their original states.

According to the configuration as in the above example, since the operation unit 14a can be used to switch from the “covered state” to the “non-covered state”, good hygiene and safety can be obtained.

Further, the "covered state" can be switched to the "non-covered state" by the urging force applied from the coil spring 64. Therefore, it is not necessary for the user to apply a force for switching from the "covered state" to the "non-covered state" on the cover portion 4. As a result, it is possible to switch from the "covered state" to the "non-covered state" more easily, and the convenience for the user can be further improved.

When switching to the "covered state" or the "non-covered state", the urging force applied from the coil spring 64 before the cover portion 4 passes the predetermined position and after the cover portion 4 passes the predetermined position. The operation (rotation) direction of the rotation drive unit 62 may be reversed. Then, in the "cover state", an urging force in a direction opposite to the direction in which the cover portion 4 is switched from the "cover state" to the "non-cover state" is applied from the coil spring 64 to the rotation drive portion 62. You may. With such a configuration, it is possible to easily switch from the "covered state" to the "uncovered state", and the "covered state" can be maintained more reliably, which is intended to be the "uncovered state". It is possible to more reliably prevent switching without switching.

Further, in the above example, when switching from the "covered state" to the "non-covered state", the cover portion 4 is rotated mainly by the urging force from the coil spring 64, triggered by the forward movement of the pressing operation portion 65. However, the cover portion 4 is rotated by a force applied from the pressing operation portion 65 to the rotation drive portion 62 via the spring cover 63 or the like mainly due to the operation on the operation portion 14a, and at that time, the coil spring 64 May be configured to apply an assist force for rotating the cover portion 4 to the rotation drive portion 62 more easily. In this case, even if the operating force applied to the operating unit 14a is relatively small, the "covered state" can be smoothly switched to the "non-covered state", and the operability can be improved. ..

(E) By using, for example, the support rotation unit 7 and the lock mechanism 8 as shown in FIG. 24 instead of the configuration described in (d) above, power generation of a spring or the like is triggered by an operation on the operation unit. The rotation drive unit may be configured to rotate by the force generated in the unit. More specifically, the rotation drive unit may be configured to rotate by the force generated in the power generation unit by releasing the lock by the lock mechanism 8 triggered by the operation on the operation unit.

The support rotation unit 7 includes a case portion 71, a rotation drive portion 72, a rack 73, a power generating portion, and a coil spring 74 as an “urging means”.

The case portion 71 is attached to the recess forming portion 102 in a state where a part of the rotation drive portion 72 and the rack 73 and the like are housed inside. The rotation drive unit 72 has substantially the same configuration as the rotation drive unit 32 of the first embodiment and includes a gear portion 72a, but unlike the first embodiment, the notch portion 32b, It is not provided with 32c (in this example, the rotation regulation mechanism 34 is also not provided). The rotation drive unit 72 supports the cover unit 4 in a rotatable state by the same structure as that of the first embodiment. The rack 73 is provided so as to be reciprocally movable in the case portion 71, and is meshed with the gear portion 72a. The cover portion 4 rotates as the rack 73 reciprocates. The coil spring 74 is provided in a compressed state, and applies an urging force in the forward (downward) direction to the rack 73. As a result, the cover portion 4 is given an urging force in the direction of switching from the “covered state” to the “non-covered state”.

The lock mechanism 8 is provided at a position facing the support rotation unit 7 with the central axis of the drain pipe 2 interposed therebetween, and includes a mechanism case portion 81 and a slide lock portion 82.

The mechanism case portion 81 has a cylindrical shape as a whole, and has a flange portion 81a formed so as to protrude outward in the radial direction at one end portion thereof and a male screw portion 81b formed on the outer periphery on the other end side of the collar portion 81a. And have. Then, while inserting the mechanism case portion 81 into the mounting hole 103a formed through the first hanging portion 103, the male screw portion 81b is screwed into the inner circumference of the predetermined nut member 83, and the flange portion 21 and the nut member 83 are used. By sandwiching the first hanging portion 103, the mechanism case portion 81 and thus the lock mechanism 8 are attached to the first hanging portion 103. An annular sealing member 84 is arranged between the collar portion 81a and the first hanging portion 103, and the sealing member 84 prevents water leakage through the mounting hole 103a.

The slide lock portion 82 is installed in the mechanism case portion 81 in a state where it can be reciprocated in the horizontal direction. The end of the transmission member 15 is connected to the slide lock portion 82, and the slide lock portion 82 can be reciprocated as the transmission member 15 reciprocates. An annular cover-locked portion 82a is provided at the tip of the slide lock portion 82. The cover-locked portion 82a is a portion where the locking locking protrusion 43 projecting from the back surface of the cover portion 4 is locked in the “covered state”. By locking the locking protrusion 43 for locking with respect to the cover locked portion 82a, the rotation of the cover portion 4 is restricted against the urging force applied from the coil spring 74 in the “covered state”. Can be locked in the state.

In this example, the transmission member 15 reciprocates with the reciprocating movement of the operation unit 14a, as in the second embodiment. However, in this example, the transmission member 15 is provided with a force for removing the slide lock portion 82 (moving the slide lock portion 82 to the left in FIG. 24) by a spring or the like (not shown). The force is applied to the slide lock portion 82 via the transmission member 15.

The support rotation unit 7 and the lock mechanism 8 configured as described above operate as follows. That is, in the "cover state" (see FIG. 24), when the operation unit 14a is operated (for example, pressed) to move the transmission member 15 forward, the slide lock portion 82 moves forward (moves to the right in FIG. 24). , The locking protrusion 43 is released from the cover locked portion 82a. As a result, the lock mechanism 8 unlocks the cover portion 4. Therefore, in this example, the cover portion 4 is unlocked by the lock mechanism 8 without directly touching the lock mechanism 8. Then, when the lock is released, the rotation drive unit 72 and the cover unit 4 are rotated by the urging force from the coil spring 74, and the state is switched from the “covered state” to the “uncovered state” (see FIG. 25). .. When the operation on the operation unit 14a is released, the transmission member 15 and the slide lock unit 82 and the like are restored to their original positions by a force applied from a spring or the like (not shown) described above.

On the other hand, in the "uncovered state", the surface of the cover portion 4 is pressed to rotate the cover portion 4 against the urging force applied from the coil spring 64, so that the "uncovered state" is changed to the "covered state". Is switched to. When the switch is switched to the "cover state", the lock locking protrusion 43 is locked to the cover locked portion 82a. That is, the cover portion 4 is locked by the lock mechanism 8 to maintain the "cover state".

According to the configuration as in the above example, the same effect as that of the configuration illustrated in (d) above can be obtained. That is, good hygiene and safety can be obtained. Further, since the "covered state" can be switched to the "uncovered state" by the urging force applied from the coil spring 74, the "covered state" can be more easily switched to the "uncovered state", and the user can switch to the "uncovered state". It is possible to further improve the convenience for the user.

(F) In the above embodiment, in the "cover state", the cover portions 4 and 17 and the recess forming portions 102 and 112 are configured so as not to come into contact with each other. On the other hand, in the "cover state", at least a part of the cover portion may come into contact with a predetermined portion (for example, an intermediate step portion) in the recess forming portion, and the cover portion may be supported by the portion.

For example, as shown in FIGS. 26 and 27 (in addition, FIG. 27 shows the rotation drive unit 62 and the like in the “cover state”), the legs 41a are located at the four corners of the cover unit 4 (cover body unit 41). And the receiving portions 104a are provided at the four corners of the intermediate step portion 104, the leg portion 41a comes into contact with the receiving portion 104a in the "cover state", and the cover portion 4 is supported by the recess forming portion 102 (receiving portion 104a). It may be configured as follows. Of course, this is only an example, and it is not always necessary to provide the leg portion 41a and the intermediate step portion 104 (receiving portion 104a), and at least a part of the cover portion comes into contact with a predetermined portion in the recess forming portion in the “cover state”. , The structure may be such that the cover portion is supported.

In order to realize the above configuration, at least when the cover is in the "cover state", the cover portion 4 can move in the vertical direction with respect to a portion that rotatably supports the portion (rotation drive portion 62 in this example). It is preferable that the structure is such that the portion is floating from the portion (see FIG. 28). With this configuration, the cover portion 4 (leg portion 41a) can be more reliably brought into contact with the recess forming portion 102 when the “cover state” is set, and the cover portion 4 can be in a more stable state. It becomes possible to support. Further, when a downward load is applied to the cover portion 4 such as when the cover portion 4 is stepped on, the load is transmitted from the cover portion 4 to a portion (rotation drive portion 62) that rotatably supports the cover portion 4. This can be prevented, and damage or deformation of the relevant portion can be prevented more reliably.

In FIG. 28, in the "cover state", when viewed along the rotation axis direction of the rotation drive unit 62, the two parallel sides of the connecting portion 62a are configured to extend in the vertical direction. As long as the cover portion 4 can move in the vertical direction with respect to the portion that rotatably supports the cover portion 4 and is in a floating state from the portion, the extending directions of these two sides may be appropriately changed. Therefore, for example, the two sides may be configured to extend in a direction inclined by a predetermined angle (for example, 30 degrees or less) with respect to the vertical direction (in this configuration, the cover portion 4 rotatably supports the cover portion 4). It can be moved diagonally up and down with respect to the part). The angle of the slit 42a may be appropriately changed according to the configuration of the connecting portion 62a.

(G) In the second embodiment, the stop angle of the cover portion 17 is continuously adjustable, but the stop angle of the cover portion may be adjusted stepwise. For example, in the "non-covered state", the cover portion can be selected from a state in which the gap formed between the recess forming portion and the cover portion is opened relatively large and a state in which the gap is opened relatively small. The stop angle of is adjustable in two steps. This configuration can be realized, for example, by providing a notch portion similar to these between the first notch portion 32b and the second notch portion 32c in the rotation drive unit 32 in the first embodiment. Of course, the stop angle of the cover portion may be adjustable in multiple stages of three or more stages.

(H) In the above embodiment, the cover portions 4 and 17 are rotatably supported by the central portion on the outer edge side thereof, but the shaft support position is not limited, and for example, the cover portion. May be rotatably supported at both ends on the outer edge side thereof. Further, the shape of the cover portion may be appropriately changed according to the shape of the concave portion and the like.

(I) In the third embodiment, when the cover portion 17 is rotated so as to switch from the "covered state" to the "non-covered state", the locking portion 171a is interlocked with the cover portion 17 to cause a foreign matter. Although it has a function of lifting the collecting unit 13, it may not have such a function. That is, the foreign matter collecting portion 13 is maintained in a lifted state by, for example, being lifted and locked by hand in the "uncovered state" without having the above-mentioned function as the locking portion. What is possible may be provided.

(J) In the third embodiment, the arm portion 13c is configured so that its rotation is restricted in a state where it is raised to some extent (for example, about 30 ° with respect to a horizontal plane). On the other hand, when the arm portion 13c is rotated to one side, the rotation is restricted while the arm portion 13c is raised to some extent, while the arm portion 13c is rotated to the other side. In addition, the rotation of the arm portion 13c may be restricted in a more laid-down state (for example, a horizontally laid-down state) as compared with the case where the arm portion 13c is rotated to one side. In this configuration, by changing the arrangement direction of the foreign matter collecting portion 13, the foreign matter collecting portion 13 is lifted in conjunction with the cover portion 17, or the foreign matter is not interlocked with the cover portion 17. The collecting unit 13 can be arbitrarily switched to a state in which it cannot be lifted. That is, the user can select a more preferable state for the user from each of the above states only by changing the arrangement direction of the foreign matter collecting unit 13, and the drainage structure 11 is used in this selected state. be able to. Therefore, the convenience for the user can be further improved.

(K) In the above embodiment, in the "cover state", most of the recesses 108 and 118 are hidden from the outside by the cover portions 4 and 17, but all of the recesses are hidden from the outside. It may be configured to be in a state of being closed. For example, a cover portion slightly larger than the opening of the recess may be arranged outside the recess, and the cover portion may cover the entire recess.

(L) In the above embodiment, the washing place pan 100 and the sink 110 are mentioned as the installation target parts, but the installation target parts are not limited to these. Therefore, for example, a bathtub, a washbasin, or the like may be an installation target portion.

(M) The shapes of the recess forming portions 102 and 112 in the above embodiment are examples, and the shape of the recess forming portions may be changed as appropriate.

1,11 ... Drainage structure, 2,12 ... Drainage pipe, 4,17 ... Cover part, 8 ... Lock mechanism (locking means), 13 ... Foreign matter collecting part, 14a, 33 ... Operation part, 32,162 ... Rotation Drive unit (rotation support unit), 34 ... rotation regulation mechanism (non-cover state maintenance means), 36a ... ring (locking means), 37 ... spring (urging means), 38 ... engaging teeth (locking means), 74 ... Coil spring (urging means), 100 ... Washing area pan (installation target part), 102, 112 ... Recess forming part, 110 ... Sink (installation target part), 108, 118 ... Recess, 171a ... Locking part (catch) Collecting part holding means), 163 ... Stopped state maintaining part (non-covering state maintaining means).

Claims (8)

It is recessed in a predetermined installation target portion, which forms a recess that opens upward, is configured so that drainage can flow into the recess, and a drain pipe through which the inflowing drainage flows is connected to the bottom. Recessed part and
By arranging the recess so as to cover the recess, it is possible to make the cover state in which all or most of the recess is hidden from the outside, while the state of covering the recess is released to release the recess. It is equipped with a cover part that can be made uncovered so that it can be seen from the outside.
A drainage structure configured so that drainage can flow into the recess in both the covered state and the uncovered state.
The cover portion is supported in a rotatable state by a rotation shaft located on the outer edge side of the cover portion.
By rotating the cover portion so that the outer edge on the side opposite to the rotating shaft rises, it is possible to switch from the covered state to the non-covered state, while the opposite to the rotating shaft. By rotating the cover portion so that the outer edge on the side is lowered, the non-covered state can be switched to the covered state .
A drainage structure including a non-covered state maintaining means capable of maintaining the covered portion in a stopped state when the covered state is in the non-covered state. The drainage structure according to claim 1 , wherein the non-cover state maintaining means is configured to be able to maintain the cover portion in a stopped state at a plurality of types of rotation angles. An urging means for applying an urging force in the direction of switching from the covered state to the non-covered state to the cover portion.
It is provided with a locking means that can lock the cover portion in a state where rotation is restricted against the urging force applied from the urging means.
By pushing the surface of the cover portion to switch from the non-covered state to the covered state, the cover portion is locked by the locking means, and the covered state is maintained.
The drainage structure according to claim 1 or 2 , wherein the cover portion can be unlocked by the locking means without directly touching the locking means. An operation unit provided separately from the cover unit and to be operated by the user when switching to the cover state or the non-cover state.
It is provided with a rotation drive unit that supports the cover unit and is configured to be rotatable in response to an operation on the operation unit.
The drainage structure according to claim 1 or 2 , wherein the cover portion is configured to rotate with the rotation of the rotation driving portion. A foreign matter collecting portion that can collect foreign matter that has flowed into the recess and is removable outside the recess is provided.
By rotating the cover portion so as to switch from the cover state to the non-cover state, the foreign matter collecting portion is configured to be in a lifted state in conjunction with the cover portion. The drainage structure according to any one of claims 1 to 4, which is characterized. A foreign matter collecting portion that can collect foreign matter that has flowed into the recess and is removable outside the recess is provided.
The back surface of the cover portion is provided with a collecting portion holding means that can maintain the foreign matter collecting portion in a lifted state by locking the foreign matter collecting portion in the uncovered state. The drainage structure according to any one of claims 1 to 4. The drainage structure according to any one of claims 1 to 6 , wherein the cover portion and the recess forming portion are configured so as not to come into contact with each other in the cover state. It is rotatable by the rotating shaft and has a rotating support portion that supports the cover portion.
The drainage structure according to any one of claims 1 to 7 , wherein the cover portion is detachably configured with respect to the rotation support portion.

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