JP2019002134A - Connection structure and connection method of joint members - Google Patents

Abstract

To provide a connection structure of joint members allowing very easy jointing work of the joint members, and capable of further surely securing excellent water cut-off performance.SOLUTION: A connection structure 91 comprises a waterproof pan 110 having a drain port forming part 112 provided with a drain port 111 and a hooking part 113, and a joint member 3. The joint member 3 has a soft member 33 comprising a soft cylindrical part 331 and a soft flange-like part 332, and a hard member 31 comprising a hard cylindrical part 311 and a hard flange-like part 312. The hard cylindrical part 311 has a claw part 311A. While elastically deforming the claw part 311A, the soft cylindrical part 331 and the hard cylindrical part 311 are inserted into the drain port 111, and the elastic deformation of the claw part 311A is released at a part deeper than the hooking part 113, and the joint member 3 is connected to the drain port forming part 112. After the completion of the connection, at least the soft cylindrical part 331 is set in a sandwiched state between the drain port forming part 112 and the hard cylindrical part 311.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a connection structure of a joint member in which a joint member through which drainage flows is connected to a waterproof pan, and a connection method of the joint member to the waterproof pan.

  Conventionally, a tubular joint member is used to communicate a drainage port of a tank body (for example, a bathtub) and a drainage port of a waterproof pan. The joint member is connected to a drain port forming portion that is a part for forming a drain port in the waterproof pan, thereby communicating both the drain ports of the tank body and the waterproof pan.

  Conventionally, considering the ease of connection of a joint member, the joint member may be formed of a soft material such as rubber or a soft resin. In general, for the connection of the joint member to the drain port forming portion, a connection structure (hereinafter referred to as “the joint member” is connected to the drain port forming portion by inserting the joint member into the drain port of the waterproof pan. "First connection structure") is adopted.

  In recent years, a cylindrical soft member (tub drainage joint) made of a soft material (rubber), and a cylindrical hard member (connecting ring) inserted in a state protruding from the lower part of the soft member, There has been proposed a connection structure (hereinafter referred to as “second connection structure”) using a joint member constituted by (see, for example, Patent Document 1).

  In this connection structure, the hard member includes a plurality of lock claws protruding outward and extending in the circumferential direction on the outer periphery of the portion exposed from the lower portion of the soft member, and also engages the tool on the inner periphery. It has an inward flange for the purpose. When connecting the joint member, insert the part of the hard member exposed from the lower part of the soft member into the drain of the waterproof pan, and then place a predetermined tool inside the hard member through the upper opening of the soft member However, the hard member is rotated by rotating the tool while the tool is engaged with the inward flange portion. And a coupling member will be in the state connected to the drain port formation part by engaging a lock nail | claw with the lower edge of the drain port in a waterproof pan.

  In the second connection structure, the waterproof member is secured between the joint member and the waterproof pan by sandwiching the lower portion of the soft member between the upper surface of the hard member and the waterproof pan.

JP 2013-100644 A

  By the way, in the first connection structure, since the joint member is formed of a soft material, the joint member is likely to be deformed during the insertion of the joint member into the drain port of the waterproof pan. It is difficult to insert. Further, it is difficult to determine whether or not the joint member has been normally inserted into the drain port, that is, whether or not the joint member has been connected in an appropriate state.

  On the other hand, in the second connection structure, the joint member can be relatively easily inserted into the drain port due to the presence of the hard member. However, in order to connect the joint member, a troublesome work is required in which a tool is arranged inside the hard member through the upper opening of the soft member and the hard member is rotated by this tool. In addition, it is difficult to determine whether or not the lock claw is properly engaged with the lower edge of the drain outlet in the waterproof pan. That is, as in the first connection structure, it is difficult to determine whether or not the joint member is connected in an appropriate state.

  As described above, in any connection structure, the work related to attachment or the like is never easy, and it is not easy to determine whether or not the connection state is appropriate.

  Furthermore, in the first connection structure, since the joint member is simply inserted into the drain port, the water-stopping property tends to be insufficient.

  On the other hand, the second connection structure is configured to secure water stoppage by sandwiching the lower part of the soft member between the upper surface of the hard member and the waterproof pan. However, for example, due to the thickness of the waterproof pan, the soft member should If pinching of the lower part of the sheet becomes insufficient, the water stoppage may be significantly reduced.

  The present invention has been made in view of the above circumstances, and the object thereof is to make the work related to the connection of the joint member very easy and to ensure a good water-stopping property more reliably. An object of the present invention is to provide a connection structure for a joint member that can be used.

  In the following, each means suitable for solving the above-described object will be described in terms of items. In addition, the effect specific to the means to respond | corresponds as needed is added.

Means 1. A waterproof pan having a drain port and a drain port forming part which is a part forming the drain port, and a joint member through which drainage from the tank flows,
A connection structure of a joint member according to the connection of the joint member to the drain port forming portion,
The drainage port forming part comprises a stepped hook part,
The joint member is
A soft member comprising a tubular soft tubular portion, and a soft collar-like portion formed to protrude outward from one end of the soft tubular portion;
A cylindrical hard cylindrical portion, and a hard hook-shaped portion formed to protrude outward from one end of the hard cylindrical portion, and a hard member formed of a material harder than the soft member,
The soft tubular portion and the hard tubular portion are opposed to each other, and the hard tubular portion is inserted in a state protruding from the other end portion of the soft tubular portion with respect to the soft tubular portion; By being, the soft member and the hard member are combined,
A portion protruding from the other end of the soft cylindrical portion of the hard cylindrical portion is provided with an elastically deformable claw portion protruding outward,
When the claw portion is elastically deformed inward, the soft cylindrical portion and the hard cylindrical portion are inserted into the drainage port, and the claw portion is disposed when the claw portion is disposed behind the hook portion. It is configured so that the joint member is connected to the drain port forming portion by releasing the elastic deformation of
The soft bowl-shaped portion is disposed between the hard bowl-shaped portion and the waterproof pan, and the soft tubular portion is disposed between the drain port forming portion and the hard tubular portion, and at least the soft tubular portion. Is a state of being sandwiched between the drain port forming part and the hard cylindrical part.

  According to the means 1, the joint member includes a soft member formed of, for example, rubber or soft resin, and a hard member formed of a material harder than the soft member (for example, hard resin). Both members each have a bowl-shaped portion and a cylindrical portion. And while the both hook-shaped parts oppose each other, the cylindrical part (hard) of the hard member projects from the other end of the soft cylindrical part with respect to the inside of the cylindrical part (soft cylindrical part) of the soft member. By being in a state in which the (cylindrical portion) is arranged, the soft member and the hard member are combined.

  In addition, according to the means 1, the claw portion that can be elastically deformed is provided on the portion of the hard cylindrical portion protruding (exposed) from the soft cylindrical portion. Then, both the cylindrical portions are inserted into the drainage port while elastically deforming the claw portion inward, and the claw portion is disposed deeper (downward) than the hanging portion provided in the drainage port forming portion; The joint member is configured to be connected to the drain port forming portion by releasing the elastic deformation of the claw portion when it becomes. That is, the joint member is configured to be connected to the drain port forming portion by a snap fit (an attachment method using the elasticity of the material). Here, at the time of connection, the presence of the hard cylindrical portion makes it difficult for the joint member to be deformed during the insertion of the joint member (both cylindrical portions) into the drain port, and the joint member can be easily connected to the drain port. Can be inserted. Moreover, it is only necessary to simply insert the joint member into the drain port, and it is not necessary to perform laborious and labor-intensive work using a tool. Furthermore, it is possible to easily realize a configuration in which sound and impact are generated with the release of elastic deformation in the claw portion, and by adopting this configuration, the joint member is appropriately selected depending on the presence or absence of sound and impact. It can be easily determined whether or not it is connected in a state. As a result, the work related to the connection of the joint member can be made very easy, and the workability can be greatly improved.

  Furthermore, according to the means 1, in a state where the joint member is connected to the drain port forming portion, the soft hook portion is disposed between the hard hook portion and the waterproof pan, and the drain port forming portion and the hard cylindrical shape are disposed. The soft cylindrical part is arranged between the parts, and at least the soft cylindrical part is sandwiched between the drain port forming part and the hard cylindrical part (clamped while applying force). That is, depending on the position of the joint member along the insertion direction to the drain port after the connection is completed, the position of the joint member along the insertion direction varies slightly rather than the soft hook-shaped portion that may not be sufficiently caught. Even if it does, the soft cylindrical part which can fully be pinched | interposed is made into the object of pinching. Therefore, good water stoppage can be more reliably ensured between the joint member and the waterproof pan.

  In terms of design, in addition to the soft cylindrical portion, it is preferable that the soft collar portion is also sandwiched. Since both the soft cylindrical portion and the soft flange portion are sandwiched, two water-stop portions can be provided, and a very excellent water stop can be realized. In addition, even if the position along the insertion direction of the joint member after the completion of connection is deviated from the designed position, good water-stopping properties are ensured by the soft tubular portion.

  Mean 2. The joint according to means 1, characterized in that an outer surface of the hard cylindrical part has a shape corresponding to the soft cylindrical part, and is provided with a receiving groove part in which the soft cylindrical part is arranged. Member connection structure.

  According to the said means 2, the soft cylindrical part is the state arrange | positioned in the accommodation groove part of the shape corresponding to the soft cylindrical part provided in the outer surface of the hard cylindrical part. Therefore, it can be said that at least a part of the other end surface of the soft cylindrical portion is covered with the hard cylindrical portion. Thereby, when inserting both cylindrical parts with respect to a drain outlet, the other end part of a soft cylindrical part becomes difficult to catch on a waterproof pan. As a result, the work related to the connection of the joint members can be made easier. Furthermore, it becomes difficult for a soft cylindrical part to remove | deviate from a hard cylindrical part, and the attachment stability of a hard member and a soft member can be improved.

  Means 3. Means 1 or 2 is characterized in that a taper portion having a shape gradually narrowing toward the outermost end of the soft tubular portion is provided on the outer surface on the other end side of the soft tubular portion. Connection structure of the joint member described.

  According to the above means 3, the outer surface on the other end side of the soft cylindrical portion is provided with a tapered portion that gradually narrows toward the other end of the soft cylindrical portion. That is, the soft cylindrical portion has a narrower front portion along the insertion direction of both cylindrical portions with respect to the drain port. Therefore, when inserting both cylindrical parts with respect to a drain outlet, the other end part of a soft cylindrical part becomes a thing which is harder to catch on a waterproofing pan. Thereby, the operation | work which concerns on the connection of a coupling member can be made easier.

Means 4. The soft member has a cylindrical shape that is continuous with an outer peripheral portion of the soft hook-shaped portion and protrudes from the soft hook-shaped portion in a direction opposite to a protruding direction of the soft cylindrical portion with respect to the soft hook-shaped portion. Having a soft connection,
The joint member is connected in series with the soft connecting portion, and has a cylindrical second hard member formed of a material harder than the soft member,
The connection structure for a joint member according to any one of means 1 to 3, wherein the soft connecting portion includes a bellows portion that is stretchable and deformable located between the second hard member and the hard flange-like portion. .

  According to the means 4, the height of the joint member can be changed by the elastic deformation of the bellows part. Thereby, even if it is a case where the height of the tank body (for example, bathtub) with respect to a waterproof pan fluctuates, a joint member can be connected more reliably to the device etc. which were provided in the drain outlet of the tank body. Thereby, the versatility of a joint member can be improved more and the cost regarding manufacture etc. can be reduced.

  Moreover, according to the said means 4, both cylindrical parts can be penetrated with respect to a drain outlet by pushing a comparatively hard 2nd hard member into the drain outlet side of a waterproof pan. Therefore, compared with the case where a soft member is pushed in, a joint member can be connected more easily.

  Means 5. 5. The joint member connection structure according to claim 4, wherein an end portion of the second hard member is in contact with the hard saddle-shaped portion in a state where the bellows portion is compressed and deformed. .

  When the second hard member is pushed in, if the soft member is sandwiched between the second hard member and the hard hook-shaped portion, the second hard member is likely to wobble at the time of pushing, and workability is reduced. There is a possibility of being invited.

  In view of this point, according to the means 5, the second hard member is pushed into the drainage side of the waterproof pan so as to insert the both cylindrical parts into the drainage port of the waterproof pan, and the bellows part is compressed and deformed. Sometimes the end of the second hard member can be brought into direct contact with the hard collar. Therefore, when pushing in the second hard member, the second hard member can be pushed in in a stable state, and workability can be further improved. In addition, the pushing force applied to the second hard member can be more reliably transmitted to the hard member and the soft member, and both cylindrical portions can be more easily inserted into the drain port.

Means 6. The claw portion is configured to be elastically deformable by bending and deforming the hard member,
The portion of the hard member that bends and deforms when the claw is elastically deformed is provided only in a portion of the hard tubular portion that protrudes from the other end of the soft tubular portion. The joint member connection structure according to any one of means 1 to 5.

  According to the means 6, the portion of the hard member that bends and deforms when the claw portion is elastically deformed is provided only at the portion of the hard tubular portion that protrudes from the soft tubular portion. That is, the portion of the hard tubular portion that sandwiches the soft tubular portion with the drain port forming portion does not bend and deform when the claw portion is elastically deformed. Therefore, the soft cylindrical portion can be sandwiched more reliably by the hard cylindrical portion and the drain port forming portion. As a result, the water stoppage can be further improved.

  Mean 7 7. The joint member connection structure according to any one of means 1 to 6, wherein an annular ridge portion protruding outward is provided on an outer surface of the soft cylindrical portion.

  According to the above means 7, the outer surface of the soft cylindrical portion is provided with a protrusion that forms an annular shape (more specifically, an annular shape when projected onto a virtual plane orthogonal to the central axis of the soft cylindrical portion). It has been. Therefore, when the soft cylindrical portion is sandwiched between the hard cylindrical portion and the drain port forming portion, the protruding portion can be pressed against the drain port forming portion. Therefore, the soft cylindrical portion can be brought into contact with the drain port forming portion in a state close to line contact, and the contact pressure of the soft cylindrical portion with respect to the drain port forming portion can be increased. Thereby, a water stop can be made still more favorable.

Means 8. On the outer surface of the soft cylindrical portion, the concave portion is provided in a portion adjacent to the protruding portion on the soft flange portion side,
The recess has an annular shape by being provided corresponding to the entire circumference of the ridge,
The means 7 is characterized in that, when the soft cylindrical portion and the hard cylindrical portion are inserted through the drain outlet, the protruding portion is configured to be deformable toward the concave portion. Connection structure for joint members.

  According to the said means 8, when inserting a soft cylindrical part and a hard cylindrical part through a drain outlet, it can be deform | transformed so that a protrusion part may bend toward a recessed part side. Therefore, when inserting a soft cylindrical part etc. into a drain outlet, the resistance which arises between a protrusion part and a drain outlet formation part can be reduced. As a result, the work related to the connection of the joint members can be further facilitated, and the workability can be further improved.

Means 9. It is a connection method of a joint member according to connection of a joint member through which drainage from the tank flows, to a drain port forming part which is a part forming the drain port of the waterproof pan,
The drainage port forming part comprises a stepped hook part,
The joint member is
A soft member comprising a tubular soft tubular portion, and a soft collar-like portion formed to protrude outward from one end of the soft tubular portion;
A cylindrical hard cylindrical portion, and a hard hook-shaped portion formed to protrude outward from one end of the hard cylindrical portion, and a hard member formed of a material harder than the soft member,
The soft tubular portion and the hard tubular portion are opposed to each other, and the hard tubular portion is inserted in a state protruding from the other end portion of the soft tubular portion with respect to the soft tubular portion; By being, the soft member and the hard member are combined,
A portion protruding from the other end of the soft cylindrical portion of the hard cylindrical portion is provided with an elastically deformable claw portion protruding outward,
When the claw portion is elastically deformed inward, the soft cylindrical portion and the hard cylindrical portion are inserted into the drainage port, and the claw portion is disposed when the claw portion is disposed behind the hook portion. By releasing the elastic deformation, the joint member is connected to the drain port forming portion, the soft hook portion is disposed between the hard hook portion and the waterproof pan, and the drain port forming portion and A joint member comprising: a step of disposing the soft cylindrical portion between the hard cylindrical portions and at least sandwiching the soft cylindrical portion between the drain port forming portion and the hard cylindrical portion. Connection method.

  According to the means 9, the same effect as that of the means 1 is achieved. The technical ideas of the above means 2 to 8 may be applied to the above means 9.

It is a partially broken front view of a drain outlet device etc. when a drain outlet is made into a closed state. It is a partially broken front view of a drain outlet device etc. when a drain outlet is made into an open state. It is sectional drawing of a coupling member. It is an expanded sectional view of the joint member for showing a hard member and a soft member in detail. It is sectional drawing, such as a coupling member for demonstrating one process of an insertion process. It is sectional drawing, such as a coupling member for demonstrating one process of an insertion process.

  Hereinafter, an embodiment will be described with reference to the drawings. As shown in FIG. 1, the drain port device 1 is attached to a bathtub 100.

  First, the bathtub 100 will be described prior to the description of the drain port device 1. The bathtub 100 includes a bottom wall portion 101 that constitutes a bottom surface thereof. The bottom wall portion 101 includes a drooping portion 102 that hangs downward, and an inner portion that projects inwardly from the lower portion of the drooping portion 102. A collar portion 103 is provided. A drain port 104 is formed inside the inner flange 103.

  Further, a peripheral wall portion (not shown) is erected on the outer periphery of the bottom wall portion 101, and a flange portion (not shown) protruding outward is provided at the upper end portion of the peripheral wall portion. An operation device (not shown) having an operation member (not shown) that can be displaced with respect to the bathtub 100 (for example, an operation button) is attached to the flange portion. In addition, you may provide the said operating device in the structure around the bathtub 100. FIG.

  Next, the drain port device 1 will be described. The drain port device 1 includes a drain port member 2, a joint member 3, an attachment member 4, a support shaft mechanism 5, a plug lid 6, and a U packing 7.

  The drain port member 2 is mainly used for connecting the joint member 3 to the bathtub 100. The drain port member 2 is formed in a cylindrical shape, and is inserted into the drain port 104 so that its own central axis and the central axis of the drain port 104 substantially coincide with each other. The drain port member 2 includes a flange portion 21 that protrudes radially outward at an upper end portion thereof, and a cylindrical insertion portion 22 that is positioned below the flange portion 21.

  The flange portion 21 is for sandwiching the bottom wall portion 101 (inner flange portion 103) and the U packing 7 with the joint member 3, and is disposed in the hanging portion 102. An annular groove extending in the circumferential direction is formed on the outer periphery of the flange portion 21, and an annular seal member 23 made of an elastically deformable material (for example, rubber or resin) is fitted into the groove. It is.

  The seal member 23 has a shape protruding outward from the flange portion 21, and the outer peripheral portion thereof contacts the hanging portion 102, thereby sealing between the hanging portion 102 and the drain port member 2.

  The inserted portion 22 is a portion that is inserted into the inner periphery of the joint member 3. At the lower portion of the inner periphery, a protruding inward protruding portion 22 </ b> A and a recessed notched recess 22 </ b> B are provided. A plurality are formed along the circumferential direction. The inward projecting portion 22 </ b> A and the notch recess 22 </ b> B are used for attaching the attachment member 4 to the inner periphery of the drain port member 2.

  Further, the drain port member 2 includes a plurality of (for example, four) locking protrusions 22C protruding outward on the outer peripheral surface of the insertion part 22 at a predetermined interval in the circumferential direction. The locking convex portion 22 </ b> C is used for attaching the joint member 3 to the drain port member 2.

  The joint member 3 is a part that forms a tubular shape and constitutes a flow path for drainage flowing from the bathtub 100 or the like. The joint member 3 includes a hard member 31 and a second hard member 32, and a soft member 33 that connects them. The hard member 31 and the soft member 33 function as a connection portion to the waterproof pan 110 disposed below the bathtub 100, and the second hard member 32 functions as a connection portion for the drain port member 2. A detailed description of the joint member 3, in particular, a detailed description of a portion related to the connection to the waterproof pan 110 in the joint member 3 will be described later. Here, it demonstrates centering on the part (especially 2nd hard member 32) which concerns on the connection to the drain port member 2 among the coupling members 3. FIG.

  The second rigid member 32 includes a cylindrical main body pipe 32A extending along the vertical direction and a connection pipe 32B extending in a state branched from the main body pipe 32A.

  The connecting pipe 32B is a part to which a connecting pipe (not shown) for flowing the waste water that has flowed into the operating device is connected. The connection pipe 32B is formed to project obliquely upward from the outer periphery of the main body pipe 32A, and its own internal space communicates with the internal space of the main body pipe 32A. And the waste_water | drain which flowed into the said operating device is guided into the main body pipe | tube 32A through the said connection pipe and the connection pipe 32B. In addition, the waste water that has flowed into the main body pipe 32A flows to the downstream side (for example, the side of the drain trap, etc.) through the hard member 31 and the soft member 33.

  Further, the joint member 3 is attached to the drain port member 2 in a state where the lower portion of the drain port member 2 is inserted through the inner periphery of the joint member 3. The attachment method of the joint member 3 with respect to the drain port member 2 in this embodiment is substantially the same as the attachment method described in JP2013-92012A.

  Explaining the attachment method, a plurality of (for example, four) guide portions 32C are formed to protrude from the upper inner peripheral surface of the main body pipe 32A at a predetermined interval (see FIG. 3). The interval between the guide portions 32C is set sufficiently wide to allow the insertion (passage) of the locking convex portion 22C.

  The upper end edge of the guide portion 32C extends in the horizontal direction along the inner peripheral surface of the main body tube 32A. On the other hand, the lower end edge of the guide portion 32C has an inclined portion 32D extending obliquely downward along the inner peripheral surface of the main body tube 32A, and is adjacent to the inclined portion 32D and horizontally along the inner peripheral surface of the main body tube 32A. A locked recess 32E that extends and is slightly recessed above the lowermost portion of the inclined portion 32D, and is positioned on the opposite side of the inclined portion 32D across the locked recess 32E. And a stopper portion 32F having a shape protruding downward from the recess portion 32E.

  In attaching the joint member 3 to the drain port member 2, first, after attaching the U packing 7 to the bottom wall portion 101, the joint member 3 is placed on the waterproof pan 110 so that the joint member 3 is disposed on the back side of the drain port 104. A bathtub 100 is installed. Then, the drain port member 2 is inserted through the drain port 104 into the inner periphery of the joint member 3. At this time, the locking projection 22C of the drain port member 2 is positioned between the guide portions 32C provided on the inner periphery of the joint member 3.

  Next, from this state, the drain port member 2 is rotated by a predetermined amount (for example, approximately 45 °), for example, clockwise in a plan view. Thereby, each latching convex part 22C is guided downward while moving along the inclined part 32D, and the drain port member 2 enters further into the inner side of the joint member 3.

  And each latching convex part 22C is located in the to-be-latched recessed part 32E, contacts the said stopper part 32F, and the further rotation of the drain port member 2 will be in the state controlled, The drainage The attachment of the joint member 3 to the mouth member 2 is completed.

  The attachment member 4 is for holding the support shaft mechanism 5 in the drain port member 2 and the joint member 3, that is, in the drainage flow path. The attachment member 4 includes an outer cylinder part 41, a holding cylinder part 42, and an arm part 43.

  The outer cylinder portion 41 has a cylindrical shape and is disposed along the inner peripheral surface of the drain port member 2. Moreover, the outer cylinder part 41 is provided with the convex part 41A which protrudes toward the outer periphery in the outer periphery. A plurality of the convex portions 41 </ b> A are provided at equal intervals along the circumferential direction of the outer cylinder portion 41. A notch is formed in a portion adjacent to each convex portion 41 </ b> A in the outer cylindrical portion 41, and as a result, each convex portion 41 </ b> A can be elastically deformed along the radial direction of the outer cylindrical portion 41.

  The holding cylinder part 42 is disposed at the center of the attachment member 4 inside the outer cylinder part 41 and has a cylindrical shape concentric with the outer cylinder part 41. The holding cylinder portion 42 is a portion that holds the support shaft mechanism 5 on its inner circumference.

  The arm part 43 connects the inner peripheral surface of the outer cylinder part 41 and the outer peripheral surface of the holding cylinder part 42, and connects the holding cylinder part 42 and the support shaft mechanism 5 held by this to the drain port member 2 and the joint member 3. This is a part to be arranged at the center of the drainage flow path. A plurality of arm parts 43 are provided at intervals along the circumferential direction of the holding cylinder part 42, so that the waste water that flows into the drain port member 2 flows downstream through the gaps between the arm parts 43. It has become.

  The attachment member 4 is attached to the drain port member 2 in a state of being inserted through the inner periphery of the drain port member 2. More specifically, the convex portion 41A is disposed in the notch recess 22B, and the portion forming the notch in the outer cylinder portion 41 is placed on the inwardly projecting portion 22A. On the other hand, the attachment member 4 is attached.

  The support shaft mechanism 5 is a mechanism that moves the stopper lid 6 up and down. The support shaft mechanism 5 includes a case portion 51 and a support shaft 52.

  The case portion 51 has a cylindrical shape and accommodates the support shaft 52 therein. The case part 51 is provided inside the holding cylinder part 42 and is in a state in which it cannot move relative to the holding cylinder part 42 in the vertical direction. The operating device is provided with a lock mechanism (not shown) for supporting the support shaft 52 at a fixed position.

  The support shaft 52 is a part that supports the stopper lid 6, and a tip portion of the supporting shaft 52 is fitted into a cylindrical part formed on the back surface of the stopper lid 6. The lower end portion of the support shaft 52 can be pushed up by a transmission member 81 (for example, a metal wire) that reciprocates with the displacement of the operation member. The transmission member 81 is configured to reciprocate within a cylindrical tube member 82 provided on the outer periphery thereof, and reciprocates within the tube member 82 by the displacement of the operation member.

  When the transmission member 81 moves forward (moves from the operation device side to the drain port device 1 side) due to the displacement of the operation member and the support shaft 52 rises, the transmission member 81 is supported by the lock mechanism in the forward movement state. The support shaft 52 is locked at a position slightly below the rising end. In this state, when the operation member is displaced again and the transmission member 81 moves forward, the support of the transmission member 81 by the lock mechanism is released, and a force such as a return spring (not shown) (for example, provided in the case portion 51) is provided. As a result, the support shaft 52 is lowered. As described above, in this embodiment, with the displacement of the operation member, the support shaft 52 is substantially locked at the position of the ascending end and the support shaft 52 is lowered when the lock is released. .

  The plug lid 6 moves up and down together with the support shaft 52 to open and close the drain port 104. The plug lid 6 includes a disk-shaped plug lid main body portion 61 made of resin or the like, and a packing portion 62 attached to the plug lid main body portion 61. The packing part 62 is formed in an annular shape by an elastically deformable material (for example, rubber, resin, etc.), and is fitted into a recess that is provided near the outer periphery of the back surface of the plug lid main body part 61 and opens to the outside. It is supposed to be in a state.

  In the present embodiment, the stopper lid 6 is moved upward with the upward movement of the support shaft 52 and the packing portion 62 is separated from the drain port member 2, whereby the drain port 104 (drain flow path) is opened. (See FIG. 2). On the other hand, the stopper lid 6 moves downward along with the downward movement of the support shaft 52, and the entire outer peripheral portion of the packing portion 62 comes into contact with the drain port member 2 (in this embodiment, the tapered portion on the inner periphery). The port 104 (drainage channel) is closed. In this embodiment, every time the operation member is operated, the stopper lid 6 is alternately raised and lowered (opening / closing the drain port 104).

  The U packing 7 is formed in an annular shape from an elastically deformable material (for example, rubber or resin). The U-packing 7 is in a state of being sandwiched together with the bottom wall portion 101 (inner flange portion 103) by the flange portion 21 and one end surface of the joint member 3, and the drain port member 2, the joint member 3 and the bathtub 100 are This is to prevent water leakage from the gap. The U packing 7 has a U-shaped cross section, and the bottom wall portion 101 (inner collar portion 103) is fitted in the inner space.

  The U-packing 7 includes a bulging portion 71 that bulges toward the bottom wall portion 101. When the bottom wall portion 101 (inner collar portion 103) is disposed with respect to the inner space of the U packing 7, the bulging portion 71 is in contact with the bottom wall portion 101 (inner collar portion 103) and is crushed and deformed. It becomes. Therefore, even if the thickness of the bottom wall portion 101 (inner collar portion 103) varies, the thickness of the U-packing 7 after the arrangement can be made constant. Thereby, as in the present embodiment, in the state where the drain port member 2 and the joint member 3 are attached, even if the distance between the end face of the flange 21 and the joint member 3 is always constant, The U packing 7 and the bottom wall portion 101 (inner flange portion 103) can be more securely sandwiched by the flange portion 21 and the one end surface of the joint member 3. As a result, good water tightness can be secured.

  Next, a joint member connection structure 91 including the waterproof pan 110 and the joint member 3 will be described. First, the waterproof pan 110 will be described.

  The waterproof pan 110 has a shallow tank shape that spreads below the bathtub 100 and is provided to prevent water leakage and improve the heat retaining function. The waterproof pan 110 is provided with a drain port 111 penetrating in the vertical direction. The drain port forming portion 112, which is a part of the waterproof pan 110 that forms the drain port 111, is configured such that the upper part has a relatively small inner diameter, while the lower part has a relatively large inner diameter. A step-shaped hook 113 is formed between the small-diameter portion and the large-diameter portion in the drain port forming portion 112.

  In addition, the cylindrical member which comprises the drain outlet formation part 112 is provided separately from the main-body part of the waterproofing pan 110, and the said cylindrical member is inserted and installed in the through-hole formed in the said main-body part (for example, The waterproof pan 110 including the drain port 111 and the hanging portion 113 may be configured by screwing.

  Next, the structure of the joint member 3 related to the connection to the waterproof pan 110 and the structure related to the connection of the members 31 to 33 constituting the joint member 3 will be mainly described. First, the hard member 31 will be described, and then the soft member 33 and the second hard member 32 will be described in this order.

  The hard member 31 is formed of a relatively hard resin or the like, and as shown in FIGS. 3 and 4, the hard cylindrical portion 311 and a hard hook-like shape provided at one end of the hard cylindrical portion 311. Part 312.

  The hard cylindrical portion 311 has a cylindrical shape and is a part inserted into the drain port 111. A claw portion 311A that protrudes outward is provided at the other end portion (lower portion) of the hard cylindrical portion 311. A plurality (four in this embodiment) of claw portions 311A are provided at equal intervals along the circumferential direction of the hard cylindrical portion 311.

  In the present embodiment, a slit 311B extending in the axial direction of the hard cylindrical portion 311 is provided at a position sandwiching the claw portion 311A in the hard cylindrical portion 311. And the nail | claw part 311A can be elastically deformed to an inner / outer direction because the part in which the nail | claw part 311A exists between the slits 311B among the hard cylindrical parts 311 elastically deforms.

  In addition, an accommodation groove 311 </ b> C that is an annular groove is provided on the outer surface of the hard cylindrical portion 311. The depth of the housing groove 311C along the radial direction of the hard cylindrical portion 311 is set to be slightly smaller than the thickness of the soft cylindrical portion 331 described later. Further, the length of the housing groove 311C along the axial direction of the hard cylindrical portion 311 is set to be slightly larger than the length of the inner surface of the soft cylindrical portion 331 described later. That is, the housing groove 311C has a shape corresponding to the soft cylindrical portion 331.

  Further, the outer diameter of a portion of the hard cylindrical portion 311 located below the accommodating groove portion 311C is the other end of the hard cylindrical portion 311 (the portion where the claw portion 311A and the inclined portion 311D described below are located). Except for this, the outer diameter of the soft cylindrical portion 331 is substantially the same. In addition, the other end portion (lower end portion) of the hard cylindrical portion 311 is provided with an inclined portion 311D in which the outer diameter gradually decreases toward the other end (downward).

  The hard hook-shaped portion 312 has a hook shape protruding outward from one end portion of the hard cylindrical portion 311. In the present embodiment, the outer diameter of the rigid hook-shaped part 312 is larger than the inner diameter of the other end part (lower part) of the second hard member 32.

  The soft member 33 is formed of a softer material (for example, soft resin or rubber) than the material constituting the hard member 31, and is provided at the soft tubular portion 331 and one end of the soft tubular portion 331. And a soft connecting portion 333.

  The soft cylindrical portion 331 has a cylindrical shape shorter than the hard cylindrical portion 311 and is a part inserted into the drain port 111. A tapered portion 331 </ b> A is formed on the outer surface on the other end side of the soft tubular portion 331. The tapered portion 331 </ b> A has a shape that gradually decreases toward the other end (lowermost portion) of the soft tubular portion 331.

  Further, on the upper side of the outer surface of the soft cylindrical portion 331, an annular ridge portion 331B protruding outward is provided. The protruding portion 331B has a protruding shape that slightly warps upward as a whole when viewed in cross section.

  Further, a concave portion 331C is provided on the outer surface of the soft cylindrical portion 331 and adjacent to the protruding portion 331B on the soft flange portion 332 side. The concave portion 331C is formed in an annular shape by being provided corresponding to the entire circumference of the ridge portion 331B.

  The soft hook-shaped portion 332 has a hook shape protruding outward from one end portion of the soft cylindrical portion 331.

  The soft connection part 333 has a cylindrical shape and is a part to which the second hard member 32 is connected in series. The soft connecting portion 333 is continuous with the outer peripheral portion of the soft hook-shaped portion 332 and protrudes from the soft hook-shaped portion 332 in a direction opposite to the protruding direction of the soft cylindrical portion 331 with respect to the soft hook-shaped portion 332. Yes. That is, the soft connecting portion 333 extends upward from the outer peripheral portion of the soft hook-shaped portion 332.

  On the upper inner surface of the soft connecting portion 333, a connecting groove portion 333A for connecting the second hard member 32 is provided. The connecting groove portion 333A is provided by forming the upper portion of the soft connecting portion 333 in a U-shaped cross section.

  In addition, the soft connecting portion 333 includes a bellows portion 333B that can be deformed and expanded along the axial direction of the soft connecting portion 333 between the soft hook-like portion 332 and the connecting groove portion 333A. The bellows portion 333B has a shape that bulges outward, and when it is compressed and deformed, it deforms so as to protrude outward (see FIG. 6).

  Similar to the hard member 31, the second hard member 32 is formed of a relatively hard resin or the like. On the outer surface on the other end side of the second hard member 32, a connecting collar portion 321 that protrudes outward is provided.

  The hard member 31, the soft member 33, and the second hard member 32 thus configured are connected in series and coaxially in this order. More specifically, the soft tubular portion 332 and the hard tubular portion 312 are opposed to each other, and the hard tubular portion 311 is inserted in a state where the soft tubular portion 331 protrudes from the other end portion of the soft tubular portion 331. By being in the installed state, the soft member 33 and the hard member 31 are combined, and the soft member 33 and the hard member 31 are connected. In this connected state, the soft cylindrical portion 331 is disposed in the receiving groove portion 311C, and the claw portion 311A protrudes downward (exposed) from the other end portion of the soft cylindrical portion 331. It has become a state. Further, the uppermost portion of the slit 311B is in a state of protruding (exposed) downward from the other end portion of the soft cylindrical portion 331. That is, the portion of the hard member 31 that bends and deforms when the claw portion 311 </ b> A is elastically deformed is provided only in a portion of the hard tubular portion 311 that protrudes from the other end of the soft tubular portion 331.

  In addition, the soft member 33 and the second hard member 32 are connected to each other by connecting the connecting flange portion 321 to the connecting groove portion 333A. In a state where the soft member 33 and the second hard member 32 are connected, the bellows portion 333B is positioned between the other end portion (lower end portion) of the second hard member 32 and the hard flange portion 312. Here, as described above, the outer diameter of the hard cylindrical portion 311 is larger than the inner diameter of the other end portion of the second hard member 32, and the bellows portion 333B protrudes outward when compressively deformed. Transforms into Therefore, when the second hard member 32 is pressed toward the hard member 31 and the bellows part 333B is compressed and deformed, the other end of the second hard member 32 is a soft member with respect to the hard bowl-like part 312. Direct contact is made without going through 33.

  Further, the joint member 3 is connected to the drain port forming portion 112 by being inserted into the drain port 111. Specifically, the hard cylindrical portion 311 and the soft cylindrical portion 331 are inserted into the drain port 111, and the claw portion 311 </ b> A is disposed deeper (downward) than the hanging portion 113, and the joint member from the drain port 111 The joint member 3 is connected to the drain port forming portion 112 by being in a state in which the disconnection of the three is prevented. In a state in which the joint member 3 is connected to the drain port forming part 112, the soft hook-like part 332 is disposed between the hard hook-like part 312 and the waterproof pan 110, and the soft cylindrical part 331 includes the hard cylindrical part 311 and It will be in the state arrange | positioned between the drain port formation parts 112. FIG. At least the soft tubular portion 331 is sandwiched between the hard tubular portion 311 and the drain port forming portion 112 (a state of being sandwiched). In this embodiment, the soft hook-shaped part 332 is also designed to be sandwiched between the hard hook-shaped part 312 and the waterproof pan 110.

  Next, a method for connecting the joint member 3 to the waterproof pan 110 (drain outlet forming portion 112) will be described. The connection process of the joint member 3 with respect to the waterproof pan 110 (drain outlet forming part 112) includes an insertion process. Note that the connection of the joint member 3 to the waterproof pan 110 (drain outlet forming portion 112) is performed in a state where the bathtub 100 is not installed above the waterproof pan 110.

  In the insertion step, as shown in FIG. 5, first, a portion (the other end side portion) located below the claw portion 311 </ b> A of the hard cylindrical portion 311 is inserted into the drain port 111. At this time, since the inclined portion 311D is provided at the other end portion (lower end portion) of the hard cylindrical portion 311, the other end side portion of the hard cylindrical portion 311 can be easily inserted into the drain port 111. it can.

  Next, as shown in FIG. 6, the second hard member 32 is pressed downward with a palm or the like, for example. Accordingly, the soft cylindrical portion 331 and the hard cylindrical portion 311 are inserted into the drain port 111 in a state where the claw portion 311A is elastically deformed inward with the contact with the drain port forming portion 112. At the time of insertion, the second hard member 32 is in direct contact with the hard collar portion 312. Moreover, at the time of insertion, the protrusion part 331B which contacted the drain port formation part 112 deform | transforms toward the recessed part 331C side by presence of the recessed part 331C provided adjacent to the protrusion part 331B.

  When the insertion of the soft cylindrical portion 331 and the hard cylindrical portion 311 into the drain port 111 proceeds and the claw portion 311A is disposed deeper (downward) than the hook portion 113, the elastic deformation of the claw portion 311A is released. The joint member 3 is connected to the drain port forming portion 112. In the present embodiment, the soft cylindrical portion 331 and the hard cylindrical portion 311 are pushed into the drain port 111 with a certain amount of force, so that the elastic deformation of the claw portion 311A can be released vigorously, and as a result, the sound and impact Can be generated.

  As described in detail above, according to the present embodiment, both the cylindrical portions 311 and 331 are inserted into the drain port 111 while elastically deforming the claw portion 311A inward, and the back side (downward) of the hanging portion 113 ), The joint member 3 is connected to the drain port forming portion 112 by releasing the elastic deformation of the claw portion 311A when the claw portion 311A is disposed. That is, the joint member 3 is connected to the drain port forming portion 112 by a snap fit (an attachment method using the elasticity of the material). Here, at the time of connection, the presence of the hard cylindrical portion 311 makes it difficult for the joint member 3 to be deformed during the insertion of the joint member 3 (both cylindrical portions 311 and 331) into the drain port 111. The joint member 3 can be easily inserted into 111. Further, it is only necessary to simply insert the joint member 3 into the drain port 111, and it is not necessary to perform a laborious and troublesome operation using a tool. Furthermore, it is possible to easily determine whether or not the joint member 3 is connected in an appropriate state by generating a sound or an impact with the release of the elastic deformation in the claw portion 311A. As a result, the work related to the connection of the joint member 3 can be made very easy, and workability can be greatly improved.

  Furthermore, in a state where the joint member 3 is connected to the drain port forming portion 112, at least the soft cylindrical portion 331 is sandwiched between the drain port forming portion 112 and the hard cylindrical portion 311 (sandwiched while applying force). State. That is, depending on the position of the joint member 3 along the insertion direction to the drain port 111 after the connection is completed, the soft member 332 that may not be sufficiently sandwiched may be used, not the joint member 3 along the insertion direction. Even if the position slightly varies, the soft cylindrical portion 331 that can be sufficiently sandwiched is targeted for sandwiching. Therefore, it is possible to more reliably ensure good water stoppage between the joint member 3 and the waterproof pan 110.

  In the present embodiment, in addition to the soft cylindrical portion 331, the soft flange portion 332 is designed to be sandwiched. By sandwiching both the soft cylindrical portion 331 and the soft flange portion 332, two water-stop portions can be provided, and extremely excellent water-stop performance can be realized. Even if the position of the joint member 3 after the completion of the connection is deviated from the designed position, the soft cylindrical portion 331 ensures a good water stoppage.

  Further, the soft cylindrical portion 331 is in a state of being disposed in the accommodation groove portion 311 </ b> C provided on the outer side surface of the hard cylindrical portion 311. Therefore, it can be said that at least a part of the other end surface of the soft cylindrical portion 331 is covered with the hard cylindrical portion 311. Thereby, when inserting both the cylindrical parts 311 and 331 with respect to the drain port 111, the other end part of the soft cylindrical part 331 becomes difficult to catch on the waterproof pan 110. As a result, the work related to the connection of the joint member 3 can be made easier. Furthermore, it becomes difficult for the soft cylindrical portion 331 to come off from the hard cylindrical portion 311, and the mounting stability of the hard member 31 and the soft member 33 can be improved.

  Furthermore, since the tapered portion 331A is provided on the outer surface on the other end side of the soft tubular portion 331, when the both tubular portions 311 and 331 are inserted into the drain port 111, the other portion of the soft tubular portion 331 is provided. The end portion is less likely to be caught on the waterproof pan 110. Thereby, the operation | work which concerns on the connection of the coupling member 3 can be made easier.

  In addition, the height of the joint member 3 can be changed because the bellows portion 333B expands and contracts. Thereby, even if it is a case where the height of the bathtub 100 with respect to the waterproof pan 110 fluctuates, the joint member 3 (second hard member 32) can be more reliably connected to the drain port member 2. Thereby, the versatility of the joint member 3 can be improved more and the cost regarding manufacture etc. can be reduced.

  Further, by pushing the relatively hard second hard member 32 toward the drain outlet 111, both cylindrical portions 311 and 331 can be inserted into the drain outlet 111. Therefore, compared with the case where the soft member 33 is pushed in, the coupling member 3 can be connected more easily.

  Further, when the second hard member 32 is pushed into the drain port 111 and the bellows portion 333B is compressed and deformed, the other end portion of the second hard member 32 can be brought into direct contact with the hard collar portion 312. . Therefore, when pushing in the 2nd hard member 32, the 2nd hard member 32 can be pushed in in the stable state, and workability | operativity can be improved further. In addition, the pushing force applied to the second hard member 32 can be more reliably transmitted to the hard member 31 and the soft member 33, and both the cylindrical portions 311 and 331 can be more easily inserted into the drain port 111. can do.

  In addition, the portion of the hard member 31 that bends and deforms when the claw portion 311 </ b> A is elastically deformed is provided only in a portion of the hard tubular portion 311 that protrudes from the soft tubular portion 331. That is, the portion of the hard tubular portion 311 that sandwiches the soft tubular portion 331 with the drain port forming portion 112 does not bend and deform when the claw portion 311A is elastically deformed. Therefore, the soft tubular portion 331 can be more reliably sandwiched by the hard tubular portion 311 and the drain port forming portion 112. As a result, the water stoppage can be further improved.

  In addition, when the soft cylindrical portion 331 is sandwiched between the hard cylindrical portion 311 and the drain port forming portion 112, the protrusion 331B can be pressed against the drain port forming portion 112. Therefore, the soft cylindrical portion 331 can be brought into contact with the drain port forming portion 112 in a state close to line contact, and the contact pressure of the soft cylindrical portion 331 with respect to the drain port forming portion 112 can be increased. Thereby, a water stop can be made still more favorable.

  Further, when the both cylindrical portions 311 and 331 are inserted through the drain port 111, the protruding portion 331B can be deformed so as to bend toward the concave portion 331C. Therefore, when inserting the cylindrical parts 311 and 331 into the drain port 111, the resistance which arises between the protrusion part 331B and the drain port formation part 112 can be reduced. As a result, the work related to the connection of the joint member 3 can be further facilitated, and the workability can be further improved.

  In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows. Of course, other application examples and modification examples not illustrated below are also possible.

  (A) The configurations of the drain port member 2, the attachment member 4, the support shaft mechanism 5, the plug lid 6 and the like mentioned in the above embodiment are examples, and these configurations can be appropriately changed. Moreover, the connection method of the drain port member 2 and the joint member 3 can be appropriately changed.

  (B) In the above embodiment, the main pipe 32A of the second hard member 32 and the portion of the soft member 33 that is not inserted through the drain port 110 have a shape extending in a straight line, but these shapes are changed. May be. For example, the soft member may include a portion that bends at a right angle.

  (C) In the above embodiment, the drain port device 1 includes the plug cover 6 for opening and closing the drain port 104 and the support shaft mechanism 5 for moving the plug cover 6 up and down. The shaft mechanism 5 may not be provided. Of course, when the support shaft mechanism 5 or the like is not provided, the attachment member 4 for holding the support shaft mechanism 5 and the member for moving the support shaft 52 up and down (for example, the transmission member 81 and the like) are unnecessary.

  (D) In the embodiment described above, the drain lid 104 is closed when the stopper lid 6 (packing portion 62) contacts the drain port member 2, but the stopper lid 6 (packing portion 62) is configured. May contact the bottom wall portion 101 so that the drain port 104 is closed.

  DESCRIPTION OF SYMBOLS 3 ... Joint member, 31 ... Hard member, 32 ... 2nd hard member, 33 ... Soft member, 91 ... Connection structure, 110 ... Waterproof pan, 111 ... Drain outlet (of waterproof pan), 112 ... Drain port formation part, 113 ... hanging part, 311 ... hard cylindrical part, 311A ... claw part, 311C ... accommodating groove part, 312 ... hard cylindrical part, 331 ... soft cylindrical part, 331A ... taper part, 331B ... protrusion part, 331C ... recess part, 332: Soft bowl-shaped part, 333 ... Soft coupling part, 333B ... Bellows part.

Claims (9)

A waterproof pan having a drain port and a drain port forming part which is a part forming the drain port, and a joint member through which drainage from the tank flows,
A connection structure of a joint member according to the connection of the joint member to the drain port forming portion,
The drainage port forming part comprises a stepped hook part,
The joint member is
A soft member comprising a tubular soft tubular portion, and a soft collar-like portion formed to protrude outward from one end of the soft tubular portion;
A cylindrical hard cylindrical portion, and a hard hook-shaped portion formed to protrude outward from one end of the hard cylindrical portion, and a hard member formed of a material harder than the soft member,
The soft tubular portion and the hard tubular portion are opposed to each other, and the hard tubular portion is inserted in a state protruding from the other end portion of the soft tubular portion with respect to the soft tubular portion; By being, the soft member and the hard member are combined,
A portion protruding from the other end of the soft cylindrical portion of the hard cylindrical portion is provided with an elastically deformable claw portion protruding outward,
When the claw portion is elastically deformed inward, the soft cylindrical portion and the hard cylindrical portion are inserted into the drainage port, and the claw portion is disposed when the claw portion is disposed behind the hook portion. It is configured so that the joint member is connected to the drain port forming portion by releasing the elastic deformation of
The soft bowl-shaped portion is disposed between the hard bowl-shaped portion and the waterproof pan, and the soft tubular portion is disposed between the drain port forming portion and the hard tubular portion, and at least the soft tubular portion. Is a state of being sandwiched between the drain port forming part and the hard cylindrical part.   The outer surface of the hard cylindrical portion has a shape corresponding to the soft cylindrical portion, and is provided with an accommodation groove portion in which the soft cylindrical portion is disposed. Connection structure for joint members.   The taper part which makes the shape which becomes thin gradually toward the other end side of the said soft cylindrical part is provided in the other end side outer surface of the said soft cylindrical part, The 1 or 2 characterized by the above-mentioned. The connection structure of the joint member as described in 2. The soft member has a cylindrical shape that is continuous with an outer peripheral portion of the soft hook-shaped portion and protrudes from the soft hook-shaped portion in a direction opposite to a protruding direction of the soft cylindrical portion with respect to the soft hook-shaped portion. Having a soft connection,
The joint member is connected in series with the soft connecting portion, and has a cylindrical second hard member formed of a material harder than the soft member,
The joint member according to any one of claims 1 to 3, wherein the soft connecting portion includes a bellows portion that can be expanded and contracted between the second hard member and the hard flange-like portion. Connection structure.   The joint member connection according to claim 4, wherein, in a state where the bellows portion is compressed and deformed, an end portion of the second hard member is in contact with the hard flange portion. Construction. The claw portion is configured to be elastically deformable by bending and deforming the hard member,
The portion of the hard member that bends and deforms when the claw is elastically deformed is provided only in a portion of the hard tubular portion that protrudes from the other end of the soft tubular portion. The joint member connection structure according to any one of claims 1 to 5.   The joint member connection structure according to any one of claims 1 to 6, wherein an annular protrusion that protrudes outward is provided on an outer surface of the soft cylindrical portion. On the outer surface of the soft cylindrical portion, the concave portion is provided in a portion adjacent to the protruding portion on the soft flange portion side,
The recess has an annular shape by being provided corresponding to the entire circumference of the ridge,
8. The protruding portion is configured to be deformable toward the concave portion when the soft cylindrical portion and the hard cylindrical portion are inserted through the drain port. Connection structure of the joint member described. It is a connection method of a joint member according to connection of a joint member through which drainage from the tank flows, to a drain port forming part which is a part forming the drain port of the waterproof pan,
The drainage port forming part comprises a stepped hook part,
The joint member is
A soft member comprising a tubular soft tubular portion, and a soft collar-like portion formed to protrude outward from one end of the soft tubular portion;
A cylindrical hard cylindrical portion, and a hard hook-shaped portion formed to protrude outward from one end of the hard cylindrical portion, and a hard member formed of a material harder than the soft member,
The soft tubular portion and the hard tubular portion are opposed to each other, and the hard tubular portion is inserted in a state protruding from the other end portion of the soft tubular portion with respect to the soft tubular portion; By being, the soft member and the hard member are combined,
A portion protruding from the other end of the soft cylindrical portion of the hard cylindrical portion is provided with an elastically deformable claw portion protruding outward,
When the claw portion is elastically deformed inward, the soft cylindrical portion and the hard cylindrical portion are inserted into the drainage port, and the claw portion is disposed when the claw portion is disposed behind the hook portion. By releasing the elastic deformation, the joint member is connected to the drain port forming portion, the soft hook portion is disposed between the hard hook portion and the waterproof pan, and the drain port forming portion and A joint member comprising: a step of disposing the soft cylindrical portion between the hard cylindrical portions and at least sandwiching the soft cylindrical portion between the drain port forming portion and the hard cylindrical portion. Connection method.

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