Heat insulating member for drain joint, and heat insulating joint for drain

Abstract

To provide a heat insulating member for drain joint which suppresses dew condensation in a drain joint member disposed in a lower part of a drain-up structure of air conditioning drain piping and to / from which the drain joint member is easily attached / detached, and a heat insulating joint for drain.SOLUTION: The present invention relates to a heat insulating member 100 for drain joint comprising: joint storage members 110L and 110R which form a space capable of storing a drain joint therein and of which outline edges 102 are separated from each other to form an opening that the drain joint can pass; a connection coupling part 150 connecting the corresponding outline edges 102 of the joint storage members 110L and 110R in a removable member with each other; air layer forming means which is disposed inside of the joint storage members 110L and 110R and forms an air layer in a gap with the drain joint; and sealing means which suppresses air circulation between the air layer and the outside.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a heat-insulating member for a drain joint used in an air-conditioning drain piping, and a heat-insulating joint for a drain. [Background technology]

[0002] As is well known, drainage generated by an air conditioner installed indoors is discharged outdoors, for example, through an air conditioner drain pipe. The air conditioning drain piping includes, for example, a drain hose made of a cross-linked polyethylene pipe connected to the drain pipe of the air conditioner, a drain joint made of an elbow joint member, a flexible hose, and a drain piping connected to the flexible hose. The drain pipe, drain hose, drain joint, flexible hose, and drain piping are connected in this order from the air conditioner side.

[0003] Moreover, air-conditioning drain piping generally has a drain-up structure that temporarily raises the pipe to a position higher than the drain port of the air conditioner (see, for example, Patent Document 1). This type of drain-up structure is constructed by connecting a flexible hose to a drain joint installed at the bottom, and then pointing the flexible hose upwards at its upper end and then downwards. The drain-up structure is configured to store the drain discharged from the air conditioner in the flexible hose, preventing odors from flowing back into the room.

[0004] On the other hand, since the drain stored in the flexible hose by the drain-up structure is at a low temperature, condensation is likely to occur on the surface of the drain joint and the flexible hose. In order to prevent such condensation, it is common practice to wrap a heat insulating material around the drain joint to cover it. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2018-054127 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, the drain joint may need to be disassembled for maintenance, and wrapping a heat insulating material around the drain joint makes it difficult to easily maintain the drain joint. In addition, wrapping a heat insulating material requires a lot of work, and the heat insulating material is expensive, which increases the cost of installation.

[0007] The present invention has been made in consideration of the above circumstances, and aims to provide a heat-insulating member for a drain joint and a heat-insulating joint for a drain that suppresses condensation in a drain joint member arranged at the bottom of a drain-up structure of an air-conditioning drain piping and allows the drain joint member to be easily attached and detached. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention proposes the following means. (1) A first aspect of the present invention is a thermal insulation member for a drain fitting, comprising: a fitting accommodating member made of a plurality of members which cooperate to form a space inside capable of accommodating a drain fitting, with dividing boundaries formed on at least a portion of the boundaries separating to form an opening through which the drain fitting can pass; connecting means for detachably connecting corresponding dividing boundaries of the members; air layer forming means which is disposed inside the fitting accommodating member and forms an air layer between the fitting and the drain fitting; and sealing means which suppresses the flow of air between the air layer and the outside.

[0009] According to the thermal insulation member for a drain joint of this invention, the joint accommodating member is composed of a plurality of members which cooperate to form a space inside in which the drain joint can be accommodated, and which form an opening through which the drain joint can pass by separating the dividing boundaries, and is provided with connecting means for detachably connecting corresponding dividing boundaries of the members, so that the joint accommodating member can be easily attached and detached to easily and efficiently store and remove the drain joint member. In addition, an air layer forming means is arranged inside the joint accommodating member to form an air layer between the joint and the drain joint, thereby preventing the low temperature of the drain from being transmitted to the surface of the joint accommodating member via the drain joint. Furthermore, since the sealing means restricts air flow between the inside of the joint housing member and the outside, condensation is restricted on the surface of the drain joint that comes into contact with the air layer. As a result, condensation at the drain joint member arranged in the drain up structure of the air conditioning drain piping is suppressed, and the drain joint member can be easily attached and detached.

[0010] Here, the number of members can be set arbitrarily, and may be, for example, two or three or more. The boundary portion refers to the edge (periphery) of the outer shape of each component. The dividing boundary portion refers to a boundary portion that can be physically separated, and does not include a portion where the boundary portions of components are connected by a hinge or the like and cannot be separated. The air layer forming means is a means for forming an air layer by forming a gap between the joint accommodating member and the drain joint, and is a means for suppressing direct contact between the joint accommodating member and the drain joint to suppress the transfer of heat from the drain joint to the accommodating member, and can be set arbitrarily, for example, as a recess or protrusion formed in the joint accommodating member, or a retaining means other than the drain joint (for example, a pipe), etc. Moreover, the size, thickness and number of air layers can be set arbitrarily.

[0011] (2) The thermal insulation member for a drain joint described in (1) above may be configured so that the sealing means holds a pipe or hose connected to the drain joint and is in close contact with an outer peripheral surface of the pipe or hose.

[0012] According to the thermal insulation member for a drain joint of this invention, the sealing means holds the piping or hose connected to the drain joint and is configured to adhere to the outer peripheral surface of the piping or hose. Therefore, while the drain joint is accommodated in the joint accommodating member, the flow of air between the air layer within the accommodating member and the outside of the accommodating member can be suppressed without directly holding the drain joint. As a result, sealing can be easily achieved with a simple structure.

[0013] Here, the pipe or hose connected to the drain joint includes parts other than the elbow member that constitutes the drain joint, such as a receiving member into which the pipe or hose is inserted.

[0014] (3) The heat-insulating member for a drain joint according to (1) or (2) above may have an overlapping portion formed at the dividing boundary portion.

[0015] According to the drain joint thermal insulation member of the present invention, since it is provided with an overlapping portion formed at the dividing boundary portion, it is possible to efficiently suppress the flow of air between the inside and outside of the joint accommodating member.

[0016] (4) The thermal insulation member for a drain fitting described in any one of (1) to (3) above may have the connecting means arranged at the corresponding dividing boundary portions and equipped with an engaging portion arranged on one of the corresponding members and an engaged portion arranged on the other, the engaging portion having an engaging claw portion and an arm portion formed on a base end side of the engaging claw portion, the engaging claw portion having a tapered portion that extends outward as it approaches the base end side and a hooking step portion formed on the base end side of the tapered portion, and the engaged portion may have a locking wall portion arranged at a position where the engaging claw portion can pass through when the engaging claw portion is displaced inwardly and where the hooking step portion can be engaged when the displacement of the engaging claw portion is released.

[0017] According to the thermal insulation member for drain joints of the present invention, the connecting means is arranged at the corresponding dividing boundary portions and has an engaging portion arranged on one of the corresponding members and an engaged portion arranged on the other. In addition, the engaging portion has an engaging claw portion with a tapered portion that extends outward toward the base end and a hooking step portion formed on the base end side of the tapered portion, and an arm portion formed on the base end side of the engaging claw portion, and the engaged portion has a locking wall portion. When the engaging claw passes under the locking wall (the inner peripheral side centered on the tube axis), the tapered portion comes into contact with the locking wall, displaces toward the inner peripheral side, and passes under the locking wall. When the engaging claw passes under the locking wall, the displacement of the engaging claw is released and the position of the engaging claw is restored to the outer peripheral side. As a result, the hook step portion is locked to the locking wall and does not easily fall off.

[0018] Here, the locking wall portion may constitute a gate-shaped ceiling portion connecting the upper parts of two legs erected from the other side member toward the outer periphery, or may constitute an approximately inverted L-shaped upper beam extending as a single beam from the upper part of one leg.

[0019] (5) The thermal insulation member for a drain joint described in any one of (1) to (4) above may include two joint accommodating members separated by a dividing boundary portion disposed on a dividing surface that includes the pipe axis of the drain joint and divides an elbow member constituting the drain joint into left and right parts including the pipe axis.

[0020] According to the thermal insulation member for a drain joint of the present invention, since it is provided with two joint accommodating members separated by a dividing boundary portion located on a dividing surface that includes the pipe axis of the drain joint and divides the elbow member constituting the drain joint into left and right halves, it can be easily and efficiently molded.

[0021] Here, including the tube axis means including the entire length of the tube axis.

[0022] (6) The thermal insulation member for a drain joint described in any one of (1) to (4) above may include two joint accommodating members divided in the vertical direction by a dividing boundary portion that includes the pipe axis of the drain joint, is perpendicular to a dividing surface that includes the pipe axis and divides the elbow member constituting the drain joint into left and right parts, and is located on a curved surface along the pipe axis of the drain joint.

[0023] According to the thermal insulation member for a drain joint of this invention, the elbow member constituting the drain joint includes the pipe axis of the drain joint and is provided with two members which are divided in the vertical direction by a dividing boundary portion which is perpendicular to a dividing surface which includes the pipe axis and divides the elbow member constituting the drain joint into left and right parts and which is arranged on a curved surface along the pipe axis of the drain joint. Since the joint accommodating member is separated in the vertical direction, even if condensation occurs inside the joint accommodating member, leakage of the condensed water to the outside is suppressed.

[0024] (7) In the thermal insulation member for a drain fitting described in any one of (1) to (6) above, the connecting means has a first engagement portion provided on at least one of the plurality of members and a second engagement portion provided on the other of the plurality of members and engaging with the first engagement portion, the second engagement portion has a locking wall portion provided at a position spaced outward from an outer surface of the other of the plurality of members, the first engagement portion has an engagement claw portion capable of passing between the other of the plurality of members and the locking wall portion, and an arm portion formed on a base end side of the engagement claw portion and connected to at least one of the plurality of members, and a hooking step portion is formed between the engagement claw portion and the arm portion by the engagement claw portion protruding outward beyond the arm portion, and the hooking step portion may engage with the locking wall portion. The phrase "other of the plurality of components" used herein means all of the plurality of components other than at least one of the components.

[0025] According to the heat-insulating member for a drain joint according to the present invention, by engaging the first engaging portion and the second engaging portion with each other, the dividing boundaries of the plurality of members can be easily mechanically connected to each other. Moreover, the engagement between the locking wall and the hooking step can be released by elastically deforming the arm inward, and at least one of the multiple members can be separated from the other of the multiple members by passing the engagement claw between the locking wall and the other of the multiple members. On the other hand, when the arm portion is elastically deformed inward, the engaging claw portion is passed between another of the multiple members and the locking wall portion, and the deformation of the arm portion is released, the arm portion restores its deformation outward and the hooking step portion engages with the locking wall portion. Therefore, the dividing boundaries of a plurality of members can be mechanically connected to each other with a simple structure of the locking wall portion, the engaging claw portion, and the arm portion.

[0026] (8) In the thermal insulation member for a drain fitting described in any one of (1) to (6) above, the connecting means has a first engagement portion provided on at least one of the plurality of members and a second engagement portion provided on another of the plurality of members and engaging with the first engagement portion, the second engagement portion being a protrusion provided on an outer surface of the other of the plurality of members, the first engagement portion having an engagement claw portion and an arm portion formed on a base end side of the engagement claw portion and connected to at least one of the plurality of members, and a hooking step portion is formed between the engagement claw portion and the arm portion by the engagement claw portion protruding inwardly beyond the arm portion, and the hooking step portion may engage with the protrusion.

[0027] According to the heat-insulating member for a drain joint according to the present invention, by engaging the first engaging portion and the second engaging portion with each other, the dividing boundaries of the plurality of members can be easily mechanically connected to each other. Furthermore, by elastically deforming the arm portion outward, the engagement between the protrusion and the hooking step portion can be released, and at least one of the multiple members can be separated from the other of the multiple members. On the other hand, when the arm portion is elastically deformed outward and the engaging claw portion is caused to climb over the protrusion and the deformation of the arm portion is released, the arm portion restores its deformation inward and the hooking step portion engages with the protrusion. Therefore, the dividing boundaries of a plurality of members can be mechanically connected to each other with a simple structure of the protrusion, the engaging claw, and the arm.

[0028] (9) In the thermal insulation member for a drain joint described in any one of (1) to (6) above, the ends of the multiple members connecting the dividing boundaries may be cylindrical, and the connecting means may include a groove formed on the outer surface of the ends of the multiple members connecting the dividing boundaries so as to extend in the circumferential direction of the ends, a cylindrical member covering the ends of the multiple members connecting the dividing boundaries from the radial outside of the ends, and a protrusion provided on the inner surface of the cylindrical member and capable of engaging with the groove.

[0029] According to the heat-insulating member for drain joints of the present invention, the ends of the multiple components that connect the dividing boundaries are covered from the radial outside by the cylindrical member, and the protrusions are engaged with grooves formed in the ends of the multiple components, making it difficult for the cylindrical member to move in the direction along the axis of the multiple components relative to the ends of the multiple components, and the dividing boundaries of the multiple components can be easily mechanically connected.

[0030] (10) In the thermal insulation member for a drain joint described in (9) above, in the plurality of members connecting the dividing boundary portions, the bottom surface of the groove may be spaced apart from the axis from the end portion toward the center portion along the axis of the plurality of members.

[0031] According to the heat-insulating member for drain joints of the present invention, the protrusions come into contact with the bottom surface of the groove more firmly as they move from the end portion to the center portion, and therefore, as the tubular member is tightened around the axis so that the protrusions move toward the center portion, the tubular member provided with the protrusions can be more firmly fixed to the end portions of the members in which the grooves are formed.

[0032] (11) In the thermal insulation member for a drain fitting described in any one of (1) to (6) above, the ends of the multiple members connecting the dividing boundaries may be cylindrical, and the connecting means may include a third engaging portion provided on at least one of the multiple members, a cylindrical member covering the ends of the multiple members connecting the dividing boundaries from the radial outside of the ends, and a fourth engaging portion provided on the cylindrical member and capable of engaging with the third engaging portion in the axial direction of the multiple members connecting the dividing boundaries.

[0033] According to the heat-insulating member for drain joints of the present invention, the ends of the multiple members connecting their dividing boundaries are covered from the radial outside by the tubular member, and the fourth engaging portion provided on the tubular member is engaged in the axial direction with the third engaging portion provided on at least one of the multiple members. This makes it difficult for the tubular member to move in the axial direction relative to the ends of the multiple members, and the dividing boundaries of the multiple members can be easily mechanically connected to each other.

[0034] (12) A second aspect of the present invention is an insulation joint for a drain, comprising: a heat-insulating member for a drain joint described in any one of (1) to (11) above; and a drain joint housed in the heat-insulating member for a drain joint.

[0035] The thermal insulation joint for drain according to the present invention suppresses condensation in the drain joint member arranged at the lower part of the drain up structure of the air conditioning drain piping, and allows the drain joint member to be easily attached and detached. Effect of the Invention

[0036] The thermal insulation member for drain joints and thermal insulation joint for drains of the present invention suppress condensation in the joint member for drains arranged at the lower part of the drain-up structure of the air conditioning drain piping, and make it possible to easily attach and detach the joint member for drains. [Brief description of the drawings]

[0037] [Figure 1]FIG. 1 is a diagram illustrating an example of a schematic configuration of an air-conditioning drain piping according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a vertical cross-sectional view illustrating an example of a schematic configuration of the drain heat-insulating joint according to the first embodiment. [Diagram 3] FIG. 1 is an exploded perspective view illustrating an example of a schematic configuration of an elbow joint member (drain joint) according to a first embodiment. [Figure 4] FIG. 1 is a vertical cross-sectional view illustrating an example of a schematic configuration of an elbow joint member (drain joint) according to a first embodiment. [Diagram 5] FIG. 2 is a perspective view illustrating a schematic configuration of a heat-insulating member for a drain joint according to the first embodiment. [Figure 6] FIG. 2 is an exploded perspective view illustrating a schematic configuration of the heat-insulating member for a drain joint according to the first embodiment. [Figure 7] FIG. 2 is an enlarged perspective view illustrating a schematic configuration of a connecting engagement portion (connecting means) of the heat-insulating member for a drain joint according to the first embodiment. [Figure 8] FIG. 2 is an enlarged vertical cross-sectional view illustrating a schematic configuration of a connecting engagement portion (connecting means) of the heat-insulating member for a drain joint according to the first embodiment. [Figure 9] FIG. 6 is a side view illustrating an example of a schematic configuration of a heat-insulating member for a drain joint according to a second embodiment of the present invention. [Figure 10] FIG. 11 is a plan view illustrating an example of a schematic configuration of a heat-insulating member for a drain joint according to a third embodiment of the present invention. [Figure 11] FIG. 11 is an exploded perspective view of a heat-insulating member for a drain joint according to a fourth embodiment of the present invention. [Figure 12] FIG. 11 is a cross-sectional view of a main part of a heat-insulating member for a drain joint according to a fourth embodiment. [Figure 13] FIG. 13 is an exploded perspective view of a heat-insulating member for a drain joint according to a first modified example of the fourth embodiment of the present invention. [Figure 14] FIG. 13 is a cross-sectional view of a main part of a heat-insulating member for a drain joint according to a first modified example of the fourth embodiment of the present invention. [Figure 15]FIG. 13 is a cross-sectional view of a main part illustrating a step of connecting the joint accommodating members in the drain joint heat insulation member according to the first modified example of the fourth embodiment of the present invention. [Figure 16] FIG. 13 is a cross-sectional view of a main part illustrating a step of connecting the joint accommodating members in the drain joint heat insulation member according to the first modified example of the fourth embodiment of the present invention. [Figure 17] FIG. 13 is a cross-sectional view of a main part of a heat-insulating member for a drain joint according to a second modified example of the fourth embodiment of the present invention. [Figure 18] FIG. 13 is a cross-sectional view of a main part of a heat-insulating member for a drain joint according to a third modified example of the fourth embodiment of the present invention. [Figure 19] FIG. 13 is a cross-sectional view of a main part illustrating a step of connecting the joint housing members to each other in a third modified example of the fourth embodiment of the present invention. [Figure 20] FIG. 13 is an exploded perspective view of a heat-insulating member for a drain joint according to a fourth modified example of the fourth embodiment of the present invention. [Figure 21] FIG. 13 is a cross-sectional view of a main part of a heat-insulating member for a drain joint according to a fourth modified example of the fourth embodiment of the present invention. [Figure 22] FIG. 13 is a cross-sectional view of a main part of a heat-insulating member for a drain joint according to a fifth embodiment of the present invention. [Figure 23] 23 is a view taken in the direction of the arrow A3 in FIG. 22. [Figure 24] FIG. 13 is a cross-sectional view of a main part of a heat-insulating member for a drain joint according to a first modified example of the fifth embodiment of the present invention. [Diagram 25] FIG. 13 is a cross-sectional view of a main part of a heat-insulating member for a drain joint according to a sixth embodiment of the present invention. [Figure 26] 26 is a view taken in the direction of the arrow A5 in FIG. 25. [Figure 27] FIG. 23 is a cross-sectional view of a main part of a heat-insulating member for a drain joint according to a first modified example of the sixth embodiment of the present invention. [Figure 28] FIG. 10 is a diagram showing the relationship between the locking protrusion of the elbow body and the locking claw body of the header nut in the first modified example of the embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0038] First Embodiment Hereinafter, an air-conditioning drain piping according to a first embodiment of the present invention will be described with reference to Fig. 1. Fig. 1 is a diagram illustrating an example of a schematic configuration of an air-conditioning drain piping according to a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes an air-conditioning drain pipe, reference numeral 6 denotes a flexible hose, and reference numeral 10 denotes a drain heat-insulating joint.

[0039] As shown in FIG. 1, the air conditioning drain piping 1 includes, for example, a drain pipe 31 provided in an air conditioner 3 mounted on a ceiling T, a drain hose 5, a drain heat-insulating joint 10, a flexible hose 6, and a drain piping 7. In addition, the drain pipe 31, drain hose 5, drain thermal insulation joint 10, flexible hose 6, and drain piping 7 are connected in this order to the air conditioner 3, and are configured to discharge the drain generated from the air conditioner 3 to the outside.

[0040] As shown in FIG. 1, the air conditioner 3 and the air conditioning drain pipe 1 are suspended from a ceiling surface T of the building by a suspension material 8, for example. Furthermore, the drain pipe 31 is connected to a drain outlet of the air conditioner 3 .

[0041] The material from which the drain hose 5 is formed can be selected arbitrarily, but for example, it is formed from a cross-linked polyethylene pipe or a soft PVC pipe with a foamed polyethylene layer laminated on the outer periphery thereof. In addition, the drain hose 5 connects the drain pipe 31 and the drain heat-insulating joint 10. Moreover, the drain hose 5 is connected, for example, to an elbow-type joint member (drain joint) described below that is disposed within the drain heat-insulating joint 10. Specifically, the drain hose 5 is fitted into a receiving member (not shown) that constitutes the elbow-type joint member (drain joint) and attached to the elbow-type joint member. It is also possible to directly connect the drain pipe 31 and the drain joint without using the drain hose 5.

[0042] The flexible hose 6 is preferably configured, for example, as a covered hose having a two-layer structure in which the outer periphery of a soft or relatively hard polyvinyl chloride hose is covered with a heat insulating material such as urethane foam. As shown in FIG. 1, the flexible hose 6 is suspended from a ceiling surface T of the building by a suspension member 8 via a mounting bracket 61.

[0043] 1, the flexible hose 6 is arranged to rise upward from the drain heat-insulating joint 10, and this rising forms a drain-up structure. The flexible hose 6 is hung downward by a mounting bracket 61 and connected to the drain pipe 7.

[0044] Next, a schematic configuration of the drain heat-insulating joint and elbow joint member (drain joint) according to the first embodiment will be described with reference to Figs. 2 to 4. FIG. 2 is a longitudinal cross-sectional view illustrating an example of the general configuration of an insulation joint for drains in the first embodiment, FIG. 3 is an exploded oblique view illustrating the general configuration of an elbow-type joint member (joint for drains), and FIG. 4 is a longitudinal cross-sectional view.

[0045] In Figures 2 to 4, symbol 10 indicates an insulation joint for a drain, symbol 40 indicates an elbow-type joint member (a joint for a drain), symbol 50 indicates the elbow body, symbol 60 indicates a receiving member, symbol 70 indicates a header nut (a fastening member), and symbol 100 indicates an insulation member for a drain joint. Also, symbol O1 denotes the first pipe axis on the air conditioner side of the drain joint, symbol O2 denotes the second pipe axis on the drain-up structure side, and symbol O denotes a pipe axis including the first pipe axis (axis) O1, the second pipe axis O2, and the pipe axis of the curved pipe part of the drain joint, etc. Also, symbol F denotes one end side (air conditioner side), symbol R denotes the other end side in the direction of the first pipe axis O1 (joint main body side), and symbol D denotes the drain-up structure side. The direction perpendicular to the tube axis O is called the radial direction, and the direction going around the tube axis O is called the circumferential direction.

[0046] As shown in FIG. 2, the drain heat-insulating joint 10 includes, for example, an elbow-type joint member (drain joint) 40 and a heat-insulating member 100 for a drain joint. The elbow joint member (drain joint) 40 is housed inside the heat-insulating member 100 for a drain joint.

[0047] In addition, a drain hose 5 and a flexible hose 6 are connected to the drain thermal insulation joint 10 (elbow-type joint member (drain joint) 40), and in this state, the inside of the drain joint thermal insulation member 100 is configured to be airtight sealed. An air layer 100A is formed between the elbow joint member (drain joint) 40 and the drain joint heat-insulating member 100 (joint housing member 110 described later) and is configured to avoid contact with the outside air.

[0048] As shown in FIGS. 3 and 4, the elbow joint member (drain joint) 40 includes, for example, an elbow body 50, a receiving member 60, and a header nut (fastening member) 70.

[0049] The elbow body 50, as shown in Figures 3 and 4, for example, comprises a cylindrically formed joint body 51, a receiving portion 52 formed at a first pipe end located at one end side F of the joint body 51, a plug portion 53 formed at a second pipe end located at the other end side R of the joint body 51, a flange portion 54, and a locking projection 55. Further, a through hole 50H penetrating along the pipe axis O is formed on the inside of the elbow body 50.

[0050] As shown in Figs. 2 to 4, the joint body 51 has, for example, a curved portion that is curved in a side view. This curved portion is formed, for example, so that a first pipe axis O1 at the first pipe end of the joint body 51 and a second pipe axis O2 at the second pipe end intersect at approximately 90°.

[0051] The configuration of the joint body 51 can be set arbitrarily, and it may be configured to have a bent portion instead of a curved portion, or to have a receiving portion instead of the insertion port 53 at the second pipe end. Furthermore, the intersection angle between the first pipe axis O1 and the second pipe axis O2 of the joint body 51 can be set arbitrarily. For example, the first pipe axis O1 and the second pipe axis O2 may intersect at an angle other than 90°.

[0052] As shown in Figures 2 to 4, the receiving portion 52 has an opening 52A at one end side F and an inner circumferential surface formed into a cylindrical shape with a larger diameter than the inner circumferential surface of the fitting body 51, and is integrally connected (molded) to the first pipe end portion of the fitting body 51 via a step portion 52D. Further, on the outer peripheral surface of the receiving portion 52, an outer peripheral thread 52S for fastening a header nut (fastening member) 70 is formed.

[0053] As shown in Figs. 2 to 4, the insertion port 53 is disposed on the drain-up structure side D, and is formed in a cylindrical shape extending upward along the second pipe axis O2 in the usage state. In addition, a flange portion 53B is formed on the outer circumferential surface of the insertion port 53, which extends radially outward from the second tube axis O2 at the second tube end and is formed in a circular shape when viewed along the second tube axis O2. The flange portion 53B has a rising wall portion extending from its outer circumferential end toward the opening 53A of the insertion port 53, and has a cross section including the second tube axis O2 formed into a substantially L-shape.

[0054] As shown in Figures 2 to 4, the flange portion 54 is arranged, for example, on the outer peripheral surface between the fitting body 51 and the receiving portion 52, extends radially outward from the first pipe axis O1, and is formed in a circular shape when viewed along the first pipe axis O1. Further, on the outer circumferential surface of the flange portion 54, for example, three (plural) locking projections 55 are formed at intervals in the circumferential direction.

[0055] The locking projection 55 extends from the outer circumferential surface of the flange portion 54 toward the outer circumferential side, has a locking wall portion 55L extending to one end side F at its tip, and is formed into a substantially inverted L shape that opens to the one end side F. In addition, a tapered surface 55T is formed on the inner side (first pipe axis O1) of the locking wall portion 55L, which inclines closer to the first pipe axis O1 side as it approaches the front side C1 in the fastening direction when fastening the header nut (fastening member) 70.

[0056] The material from which the elbow body 50 is formed can be set as desired, but it is preferable that the material be capable of being bonded with an adhesive and have high chemical resistance (for example, to condensed ethanol, etc.). In this embodiment, the elbow body 50 is made of, for example, hard polyvinyl chloride resin. Note that the elbow body 50 may be made of a resin other than polyvinyl chloride resin, such as polyethylene, polypropylene, ABS resin, etc.

[0057] As shown in FIGS. 2 to 4, the receiving member 60 includes, for example, a first tubular portion 61 located at one end side F, a second tubular portion 62 located at the other end side R, and a flange portion 65. In addition, on the inside of the receiving member 60, a first circular hole 61H is formed centered on the pipe axis O1 and has an opening 62A opening at one end side F, and a second circular hole 62H opening at the other end side R of the second tubular portion 62. Also, the first circular hole 61H is formed to have a larger diameter than the second circular hole 62H, and they are connected via a step portion 61D.

[0058] The first cylindrical portion 61 is formed, for example, in a cylindrical shape centered on the tube axis O1. As shown in FIG. 2, the first cylindrical portion 61 is adapted to have, for example, a drain hose 5 inserted therein.

[0059] As shown in FIG. 2, the second cylindrical portion 62 is formed, for example, in a cylindrical shape centered on the pipe axis O1 and coaxial with the first cylindrical portion 61, and is adapted to be inserted, for example, into the socket portion 52 of the elbow body 50. Further, on the outer circumferential surface of the second tubular portion 62, for example, a water-stopping member locking groove 62U is formed extending in the circumferential direction. An O-ring 80 that comes into contact with the inner circumferential surface of the receiving portion 52 to provide a watertight seal is attached to the watertight member locking groove 62U.

[0060] As shown in FIG. 3, the flange portion 65 is positioned between the first cylindrical portion 61 and the second cylindrical portion 62, and has a circular disk (annular) outer shape, for example.

[0061] The material from which the receiving member 60 is formed can be set as desired, but it is preferable that the material be capable of being bonded with an adhesive and have high chemical resistance (for example, to condensed ethanol, etc.). In this embodiment, the receiving member 60 is made of, for example, hard polyvinyl chloride resin. Note that the receiving member 60 may be made of a resin other than polyvinyl chloride resin, such as polyethylene, polypropylene, and ABS resin.

[0062] As shown in FIGS. 2 to 4, the header nut (fastening member) 70 includes, for example, a bag-shaped tubular portion 71, a locking claw portion 75, and a tool hooking projection portion 78. As shown in FIG.

[0063] As shown in FIGS. 2 to 4, the bag-shaped tubular portion 71 is formed, for example, in a substantially multi-stage cylindrical shape with a circular hole 71H formed in the inside along the first tube axis O1. Further, an inner peripheral thread portion 71S is formed on the inner peripheral surface of the circular hole 71H of the bag-shaped tubular portion 71. This inner peripheral thread portion 71S is configured to screw into the outer peripheral thread portion 52S of the elbow body 50. The bag-shaped tubular portion 71 has a wall portion 71L formed at one end side F, into which an opening 71A having a smaller diameter than the circular hole 71H opens. The opening 71A is formed to have a smaller diameter than the outer diameter of the flange portion 65 of the receiving member 60.

[0064] As shown in FIG. 3, the locking claw portion 75 includes, for example, a locking claw main body 76 and an arm portion 77 connected to the locking claw main body 76.

[0065] As shown in FIG. 3, the locking claw body 76 has, for example, a tapered surface 76T formed on its outer peripheral surface relative to the first tube axis O1, which is inclined closer to the first tube axis O1 as it approaches the forward side C1 in the fastening direction when fastening the header nut (fastening member) 70, and which becomes thinner at the tip side.

[0066] The arm portion 77 extends from, for example, the outer circumferential surface of the bag-shaped tubular portion 71 and is connected to the base end portion of the locking claw main body 76 (the end portion on the rear side C2 in the fastening direction). Moreover, the arm portion 77 has elasticity and is capable of bending toward the side closer to the first tube axis O1.

[0067] When the header nut (fastening member) 70 is moved toward the front side C1 in the fastening direction to fasten it to the elbow body 50, the tapered surface 76T of the locking claw body 76 engages with the tapered surface 55T, and the elasticity of the arm portion 77 causes the locking claw body 76 to be displaced toward the inner circumference, and when the locking step portion 76D passes through the locking wall portion 55L, the locking claw body 76 is locked to the locking wall portion 55L. As a result, the header nut (fastening member) 70 is prevented from rotating in the reverse direction.

[0068] As shown in FIG. 3, for example, six (plural) tool hooking projections 78 protrude from the outer circumferential surface of the bag-shaped tubular portion 71 and are arranged at intervals in the circumferential direction. The tool hook protrusion 78 hooks a tool when tightening the header nut (fastening member) 70 for installation or when loosening it for removal.

[0069] The material forming the header nut (fastening member) 70 can be set arbitrarily, but it is preferable that the material has high resistance to chemicals (e.g., condensed ethanol, etc.). In this embodiment, the header nut (fastening member) 70 is formed from, for example, hard polyvinyl chloride resin. Note that the material may be a resin other than polyvinyl chloride resin, such as polyethylene, polypropylene, or ABS resin.

[0070] The procedure for assembling the elbow joint member (drain joint) 40 will be described below. (1) First, for example, the insertion port 53 of the elbow body 50 is inserted into the flexible hose 6. Also, the drain hose 5 is inserted into the first cylindrical portion 61 of the receiving member 60 through the opening 71A of the header nut (fastening member) 70. At this time, it is preferable to insert the drain hose 4 until the end face of the drain hose 4 abuts against the stepped portion 61D.

[0071] (2) Next, the second tubular portion 62 of the receiving member 60 is inserted into the receiving portion 52 of the elbow body 50. At this time, the second tubular portion 62 is inserted until the end face of the other side R of the second tubular portion 62 abuts against the stepped portion 52D of the receiving portion 52. (3) Next, the socket portion 52 is inserted into the bag-shaped tubular portion 71 so that the inner peripheral thread portion 711S of the header nut (fastening member) 70 and the outer peripheral thread portion 52S of the socket portion 52 can be screwed together. Then, the header nut (fastening member) 70 is rotated toward the front side C1 in the fastening direction, and the inner peripheral threaded portion 711S and the outer peripheral threaded portion 52S are screwed together and fastened, thereby attaching the header nut 70 to the elbow body 50.

[0072] At this time, when the header nut 70 is rotated toward the front side C1 in the fastening direction and fastened to a predetermined position relative to the elbow body 50, the tapered surface 76T of the locking claw body 76 engages with the tapered surface 55T of the locking piece 55, and the locking claw body 76 is displaced inwardly due to the elasticity of the arm portion 77. Then, when the locking step portion 76D of the locking claw body 76 passes through the locking wall portion 55L, the position of the locking claw body 76 is displaced outwardly and is locked by the locking wall portion 55L. Since the arm portion 77 is displaced inward when the header nut 70 is tightened, no external force acts to pull it outward, and damage to the arm portion 77 is suppressed when the header nut 70 is tightened.

[0073] Next, the heat-insulating member for a drain joint will be described with reference to Figs. 2 and 5 to 8. FIG. 5 is a perspective view illustrating the schematic configuration of the heat-insulating member for a drain joint in an assembled state, and FIG. 6 is an exploded perspective view. In the figure, reference numeral 110 denotes a joint receiving portion, reference numeral 150 denotes a coupling engaging portion (coupling means), reference numeral 151 denotes an engaging portion, and reference numeral 155 denotes an engaged portion.

[0074] The material for forming the drain joint heat-insulating member 100 can be selected arbitrarily, but it is preferable that the material ensures a connection structure for easy attachment and detachment and strength when dropped as a single unit. In this embodiment, the drain joint heat insulation member 100 is formed of, for example, a transparent polypropylene resin that allows the internal state to be visually observed. The drain joint heat-insulating member 100 may be made of a resin other than polypropylene resin, and may be made transparent or opaque. Examples of the resin include polyethylene, rigid polyvinyl chloride resin, and ABS resin.

[0075] As shown in Figures 5 and 6, the thermal insulation member 100 for a drain joint includes, for example, a joint accommodating member 110, a connecting engagement portion (connecting means) 150, an air layer forming means, and a sealing means for suppressing the flow of air between the air layer and the outside.

[0076] As shown in FIGS. 5 and 6, the joint accommodating member 110 includes, for example, an elbow member accommodating portion 111, a header nut accommodating portion 112, a drain hose holding tubular portion 113, and a flexible hose holding tubular portion 114.

[0077] As shown in FIG. 2, the elbow member accommodating portion 111 is, for example, formed with a larger diameter than the outer shape of the joint body 51 of the elbow body 50, and is formed in a curved cylindrical shape formed approximately similar to the outer shape of the joint body 51, so that the joint body 51 can be accommodated inside. Specifically, the outer circumferential surface of the joint body 51 is formed to be 2 mm larger in radius with the pipe axis O as the center. For example, a gap of 2 mm or more formed between the outer circumferential surface of the joint body 51 constitutes an air layer 100A (see FIG. 2).

[0078] As shown in Figures 2, 5 and 6, the header nut accommodating portion 112 is arranged, for example, on one end side F of the elbow member accommodating portion 111 and is formed in a roughly cylindrical shape with a larger diameter than the outer shapes of the header nut 70, the flange portion 54 of the elbow main body 50, and the locking projection 55, so that the header nut 70, the flange portion 54 of the elbow main body 50, and the locking projection 55 can be accommodated inside.

[0079] Specifically, in this embodiment, as shown in FIG. 2, the radius of the flange portion 54 of the elbow body 50 and the locking projection 55 is formed to be larger by about 2 mm or more with the pipe axis O as the center. For example, a gap of 2 mm or more formed between the flange portion 54 of the elbow body 50 and the outer circumferential surface of the locking projection 55 constitutes an air layer 100A (see FIG. 2). Here, the reason why the thickness of the air layer 100A is set to 2 mm or more is that by making it 2 mm, heat conduction can be converged and sufficiently suppressed; it is preferable not to make it any thicker than that, as this would result in an outer shape becoming larger. With the above-described configuration, in the joint accommodating member 110, an air layer 100A is formed all around the elbow joint member (drain joint) 40 in the circumferential direction.

[0080] 2, 5 and 6, the drain hose holding cylinder portion 113 is disposed on one end side F of the header nut accommodating portion 120 and formed in a substantially cylindrical shape, with an opening portion 113A formed on the one end side F. Then, the receiving member 60 is inserted into the opening portion 113A to hold the drain hose 5. Specifically, as shown in FIG. 2, the drain hose holding cylinder portion 113 is configured to hold the outer peripheral surface of the receiving member 60 into which the drain hose 5 is inserted. Therefore, heat is less likely to be transferred from the drain hose 5 to the heat-insulating member 100 for a drain joint, compared to when the outer circumferential surface of the drain hose 5 is directly held. It is also possible to directly connect the drain pipe 31 and the drain joint 40 without using the drain hose 5.

[0081] 5 and 6, the flexible hose holding tube portion 114 is disposed on the drain-up side D of the header nut accommodating portion 112, is formed in a cylindrical shape, and has an opening 114A formed on the drain-up side D. The flexible hose 6 is sandwiched in the opening 114A to hold the flexible hose 6. Specifically, in this embodiment, the flexible hose holding tubular portion 114 is configured to directly hold, for example, the outer circumferential surface of the flexible hose 6, as shown in FIG.

[0082] As shown in Figs. 5 and 6, the joint accommodating member 110 includes, for example, a left joint accommodating member 110L and a right joint accommodating member 110R that are divided into left and right parts by a dividing plane that includes the pipe axis O (O1, O2). The left joint accommodating member 110L constitutes the left half of the joint accommodating member 110 as shown in FIG. The right joint heat insulation member 110R constitutes the right half of the joint accommodating member 110 as shown in FIG. Then, the left joint housing member 110L and the right joint housing member 110R are separated and separated to form an opening (not shown) through which the elbow joint member (drain joint) 40 can pass.

[0083] Here, the left joint accommodating member 110L and the right joint accommodating member 110R are separate members divided at a dividing surface, and are separable from each other at their respective outer edge portions (boundary portions, dividing boundary portions) 102 of the left joint accommodating member 110L and the right joint accommodating member 110R. Further, the outer edges (boundary portions) 102L, 102R of the left joint accommodating member 110L and the right joint accommodating member 110R are formed complementarily, and serve as butt-joint end faces that can be butted against each other.

[0084] By combining the left joint accommodating member 110L and the right joint accommodating member 110R with the outer edges (boundary, dividing boundary) 102L, 102R butted together, air does not flow through the outer edges (boundary, dividing boundary) 102 of the joint accommodating member 110. The ends in the pipe axis O direction of the joint accommodating members 110L, 110R which connect the divided boundary portions are each cylindrical. The joint housing member 110 also includes an overlapping portion 105 formed on the outer edge portion (boundary portion, dividing boundary portion) 102. In this embodiment, the overlapping portions 105 are formed, for example, alternately around the tube axis O of the joint accommodating member 110 as the center, as shown in FIG.

[0085] Specifically, as shown in FIG. 6, an overlapping portion 105L is formed on the underside of the left joint accommodating member 110L, which has an inner peripheral surface larger than the outer peripheral surface of the right joint accommodating member 110R, extends beyond the outer edge portion (boundary portion, dividing boundary portion) 102R, and overlaps with the outer peripheral surface of the right joint accommodating member 110R.

[0086] Also, as shown in FIG. 6, an overlapping portion 105R is formed on the upper side of the right joint accommodating member 110R, which has an inner peripheral surface larger than the outer peripheral surface of the left joint accommodating member 110L, extends beyond the outer edge portion (boundary portion, dividing boundary portion) 102L, and overlaps with the outer peripheral surface of the left joint accommodating member 110L.

[0087] <Air layer forming means> In this embodiment, the gap formed inside the joint accommodating member 110 constitutes the air layer forming means. The configuration of the air layer forming means can be set arbitrarily.

[0088] <Sealing means> In this embodiment, the drain hose holding tubular portion 113, the flexible hose holding tubular portion 114, the complementarily formed outer edges (boundaries) 102L and 102R, and the overlapping portion 105 constitute a sealing means for suppressing air circulation between the air layer 100A and the outside. The configuration of the sealing means can be set arbitrarily.

[0089] Hereinafter, a schematic configuration of the coupling engagement portion (coupling means) will be described with reference to Fig. 7 and Fig. 8. Fig. 7 is an enlarged perspective view for explaining the schematic configuration of the coupling engagement portion (coupling means), and Fig. 8 is an enlarged vertical sectional view. 7 and 8, reference numeral 152 denotes an engagement claw, reference numeral 152L denotes a locking step portion (hooking step portion), and reference numeral 152T denotes a tapered surface (tapered portion).

[0090] As shown in Figs. 5 and 6, the connecting engagement portion (connecting means) 150 is disposed, for example, on the outer periphery side of the outer edge portion (boundary portion) 102 of the joint accommodating member 110 at a corresponding position. The connecting engagement portion (connecting means) 150 includes, for example, an engaging portion 151 and an engaged portion 155. In this embodiment, as shown in FIG. 6, for example, the engagement portions 151 are arranged on the side where the overlapping portions 105L, 105R (105) are formed, and are arranged alternately on the joint accommodating members 110L, 110R (110). In this embodiment, a total of three (plural) are disposed on the upper and lower sides of the header nut accommodating portion 112 and at the other end side R of the elbow member accommodating portion 111. The number, arrangement, etc. of the connecting engagement portions (connecting means) 150 can be arbitrarily set while taking into consideration the sealing performance at the outer edge portion (boundary portion) 10 of the joint accommodating member 110.

[0091] The engaging portion 151 includes, for example, an engaging claw 152 located at a tip end side 151F, and an arm portion 153 formed on a base end side 151E of the engaging claw portion 152 (the side connected to the joint housing member).

[0092] As shown in Figs. 7 and 8, the engaging claw 152 is formed with a tapered surface (tapered portion) 152T that is inclined inward (towards the outer circumferential surface of the joint accommodating member) toward the tip end side 151F. Further, an inwardly recessed locking step (hooking step) 152L is formed on the base end side 151E of the engagement claw 152. For reliable locking, it is preferable that the hooking of the locking step (hooking step) 152L is formed to be 1 mm or more. In this embodiment, the arm portion 153 has a tip end side 151F which is elastically deformable inwardly in the direction of arrow T1.

[0093] The engaged portion 155 is formed in a gate shape, for example, with two legs and a locking wall portion connecting the upper ends of the legs together, and has a through hole 155H penetrating inward in the attachment / detachment direction.

[0094] Attachment and detachment using the connecting engagement portion (connecting means) 150 are performed in the following procedure. (1) First, the left joint accommodating member 110L and the right joint accommodating member 110R are brought close to each other while aligning the engaging portion 151 and the engaged portion 155. (2) The engaging portion 151 is inserted into the through hole 155H of the engaged portion 155 in the direction of the arrow T2 toward the tip side 151F. Then, the tapered surface (tapered portion) 152T comes into contact with the locking wall portion located above the locked portion 155, and the tip side 151E of the arm portion 153 elastically deforms downward, and the engaging portion 151 passes through the through hole 155H. Then, when the engaging portion 151 finishes passing through the through hole 155H, the arm portion 153 elastically deforms upward, and the locking step portion (hooking step portion) 152L is locked to the locking wall portion of the locked portion 155.

[0095] As a result, the left joint housing member 110L and the right joint housing member 110R can be prevented from coming off. Furthermore, since the engaging portions 151 are deformed inwardly, no external force acts on the engaging portions 151 to pull them apart outwardly, so that damage to the engaging portions 151 can be suppressed.

[0096] According to the first embodiment of the thermal insulation member 100 for a drain joint, the joint accommodating member 110 is divided and separated at the outer edge portion (boundary portion, dividing boundary portion) 102 to form an opening through which the drain joint can pass, and the joint accommodating member 110 can be easily attached and detached to easily and efficiently store or remove the drain joint member. In addition, since the air layer 100A is formed inside the joint accommodating member 110, the low-temperature heat of the drain is prevented from being transmitted to the surface of the joint accommodating member 110 via the drain joint. Furthermore, since the sealing means restricts air flow between the inside of the joint accommodating member 110 and the outside, condensation can be restricted. As a result, condensation in the drain joint member 10 arranged in the air conditioning drain pipe 1 is suppressed, and the drain joint member 10 can be easily attached and detached.

[0097] Furthermore, according to the thermal insulation member 100 for a drain joint, there is no need to directly hold the drain joint while it is accommodated within the joint accommodating member 110, and air flow between the air layer 100A within the joint accommodating member 110 and the outside can be suppressed.

[0098] Furthermore, according to the drain joint heat insulation member 100, the air layer 100A is formed all around the circumferential direction of the drain joint, so that the low temperature of the drain can be efficiently prevented from being transmitted to the housing member.

[0099] Moreover, according to the heat-insulating member 100 for a drain joint, the air layer 110A is formed to a thickness of 2 mm or more, so that the transfer of heat from the drain joint can be efficiently suppressed. Moreover, the drain joint heat-insulating member 100 can be prevented from becoming large.

[0100] Furthermore, since the drain joint heat-insulating member 100 is provided with the overlapping portion 105, air circulation between the inside and outside of the joint accommodating member 110 can be efficiently suppressed.

[0101] Furthermore, the drain joint heat insulation member 100 is provided with the connecting engagement portion (connecting means) 150, and therefore can be efficiently attached and detached, and the joint accommodating member 110 can be prevented from coming off.

[0102] According to the drain joint heat insulating member of the present invention, the engaging claw portion is formed with a hooking step portion having a hooking depth of 1 mm or more, so that the members can be easily and efficiently attached and detached from each other. In addition, the attached members can be prevented from coming off each other.

[0103] Here, the locking wall portion may constitute a gate-shaped ceiling portion connecting the upper parts of two legs erected from the other side member toward the outer periphery, or may constitute an approximately inverted L-shaped upper beam extending as a single beam from the upper part of one leg.

[0104] <Second embodiment> A second embodiment of the present invention will now be described with reference to FIG. FIG. 9 is a side view illustrating an example of a schematic configuration of a heat-insulating member for a drain joint according to the second embodiment of the present invention. In FIG. 9, reference numeral 200 denotes a drain joint heat insulating member, reference numeral 210 denotes a joint accommodating member, reference numeral 210A denotes a lower joint accommodating member, and reference numeral 210B denotes an upper joint accommodating member.

[0105] As shown in FIG. 9, the thermal insulation member 200 for a drain joint includes, for example, a joint accommodating member 210, a connecting engagement portion (connecting means) 150, a connecting engagement portion (connecting means) 160, an air layer forming means, and a sealing means for suppressing the flow of air between the air layer and the outside.

[0106] As shown in FIG. 9, the joint accommodating member 210 includes, for example, an elbow member accommodating portion 111, a header nut accommodating portion 112, a drain hose holding tubular portion 113, and a flexible hose holding tubular portion 114.

[0107] As shown in FIG. 9, the joint accommodating member 210 includes, for example, a lower joint accommodating member 210A and an upper joint accommodating member 210B, which are divided into upper and lower parts by a dividing surface formed along the pipe axis O and perpendicular to a plane including the pipe axis O (O1, O2).

[0108] The lower joint housing member 210A has an outer edge (boundary, dividing boundary) (not shown) formed on the lower end surface. The upper joint accommodating member 210B has an outer edge (boundary, dividing boundary) (not shown) formed on the upper end surface. The lower joint accommodating member 210A and the upper joint accommodating member 210B are vertically separated from each other to form an opening into which the drain joint member can be detached.

[0109] As shown in FIG. 9, the drain joint heat insulation member 200 includes a lower member (member) 210 and an upper member 220, for example. The drain joint heat insulation member 200 configures a drain heat insulation joint by accommodating an elbow joint member (drain joint) (not shown) in an accommodation space (not shown) formed inside.

[0110] The connecting engagement portion (connecting means) 160 includes an engaging portion 161 and an engaged portion 165 instead of the engaging portion 151 and the engaged portion 155 in the first embodiment. The connecting engagement portion (connecting means) 160 differs from the connecting engagement portion (connecting means) 150 in that the connecting engagement portion (connecting means) 160 includes an extension portion 164 for changing the orientation of the engaging portion 151. The rest of the components are the same as those of the heat-insulating member 100 for a drain joint according to the first embodiment, so the same reference numerals are used and the description will be omitted.

[0111] According to the drain joint heat insulation member 200 of the second embodiment, the joint accommodating members 210 are separated in the vertical direction, so that even if condensation occurs inside the joint accommodating members 210, the condensed water is prevented from leaking to the outside.

[0112] <Third embodiment> Hereinafter, a third embodiment of the present invention will be described with reference to FIG. FIG. 10 is a plan view illustrating an example of a schematic configuration of a heat-insulating member for a drain joint according to the third embodiment of the present invention. In FIG. 10, reference numeral 300 denotes a drain joint heat insulating member, reference numeral 310 denotes a joint housing member, and reference numeral 320 denotes a hinge portion (hinge).

[0113] As shown in FIG. 10, the drain joint thermal insulation member 300 includes, for example, a joint accommodating member 310, a connecting engagement portion (connecting means) 150, an air layer forming means, and a sealing means for suppressing the flow of air between the air layer and the outside.

[0114] As shown in FIG. 10, the joint accommodating member 310 includes, for example, an elbow member accommodating portion 111, a header nut accommodating portion 112, a drain hose holding tubular portion 113, and a flexible hose holding tubular portion 114.

[0115] As shown in FIG. 10, the joint accommodating member 310 includes, for example, a left joint accommodating member 110L and a right joint accommodating member 110R that are divided into left and right parts by a dividing plane that includes the pipe axis O (O1, O2), and a hinge portion (hinge) 320. The left joint housing member 110L and the right joint heat insulation member 110R are similar to those in the first embodiment, so they are given the same reference numerals and the description thereof will be omitted.

[0116] As shown in Figure 10, the hinge portion (hinge) 320 is arranged, for example, on the other end side R of the portion corresponding to the elbow member accommodating portion 111 of the left joint accommodating member 110L and the right joint heat insulating member 110R, and flexibly connects the outer edges (boundary portion, dividing boundary portion) of the left joint accommodating member 110L and the right joint heat insulating member 110R.

[0117] Furthermore, as the hinge portion (hinge) 320 is bent, the left side joint accommodating member 110L and the right side joint insulation member 110R rotate in the direction of arrow C3, and are separated from each other at their respective outer edge portions (boundary portion, dividing boundary portion) 102, so that an opening (not shown) is formed in the joint accommodating member 310 through which the elbow-type joint member (drain joint) 40 can pass. The rest is the same as in the first embodiment, so the same reference numerals are used and the description is omitted.

[0118] According to the heat-insulating member 300 for a drain joint according to the third embodiment, the elbow-type joint member (drain joint) 40 can be efficiently attached and detached.

[0119] <Fourth embodiment> Hereinafter, the fourth embodiment of the present invention will be described with reference to FIGS. FIG. 11 is an exploded perspective view of a heat-insulating member 400 for a drain joint according to a fourth embodiment of the present invention. As shown in FIG. 11, a heat insulating member for a drain joint 400 includes a connecting engagement portion (connecting means) 405 and a clamping portion 406 instead of the connecting engagement portion 150 of the heat insulating member for a drain joint 100 of the first embodiment.

[0120] The connecting engagement portion 405 mechanically connects the dividing boundary portions of the joint accommodating members 110L and 110R. The connecting engagement portion 405 has a first engagement portion 409 and a second engagement portion 410. There is no limit to the number of connecting engagement portions 405 provided in the drain joint heat insulation member 400, but in this embodiment, the joint accommodating members 110L and 110R are provided with a plurality of (three in this embodiment) engagement portions 409, 410. The number of first engagement portions 409 provided in the right joint accommodating member (at least one of the multiple members) 110R and the number of second engagement portions 410 provided in the left joint accommodating member (the other of the multiple members) 110L are equal to each other. The engaging portions 409, 410 are provided on the outer side (hereinafter referred to as the outer side of the curve) and the inner side (hereinafter referred to as the inner side of the curve) of the elbow joint member 40 in the header nut accommodating portion 112. The engaging portions 409, 410 are provided on the outer side of the curve in the elbow member accommodating portion 111.

[0121] The first engagement portion 409 is provided on an inner portion of the curve at the dividing boundary of the right joint accommodating member 110R and an outer portion of the curve at the dividing boundary of the left joint accommodating member 110L. The second engagement portion 410 is provided on an inner portion of the curve at the dividing boundary of the left joint accommodating member 110L and an outer portion of the curve at the dividing boundary of the right joint accommodating member 110R. The second engagement portion 410 engages with the first engagement portion 409 in the circumferential direction.

[0122] As shown in FIG. 12, for example, the first engagement portion 409 has an engagement claw portion 413 and an arm portion 414. Here, one side in the circumferential direction toward which the dividing boundary of the right joint accommodating member 110R where the first engagement portion 409 is provided faces is referred to as the tip side F4. In the circumferential direction, the side opposite to the tip side F4 is referred to as the base side R4. The engagement claw portion 413 is disposed on the tip side F4 of the dividing boundary portion of the right joint housing member 110R. The radially outer (outer) surface of the engagement claw portion 413 is a tapered surface 413T that is inclined radially outward as it approaches the base end side R4. The arm portion 414 is formed on the base end side R4 of the engagement claw portion 413. The arm portion 414 is connected to the outer surface (the radially outer surface) of the right joint accommodating member 110R. Between the engagement claw portion 413 and the arm portion 414, the engagement claw portion 413 protrudes radially outward beyond the arm portion 414, thereby forming a hook step portion 409L.

[0123] The second engagement portion 410 has a locking wall portion 417 and a pair of legs 418 . The locking wall portion 417 is provided at a position spaced radially outward from the outer surface of the left joint accommodating member 110L. The pair of legs 418 extend radially inward (inward) from each end of the locking wall portion 417 in the first pipe axis O1 direction to the left joint accommodating member 110L. A through hole 410a that passes through the second engagement portion 410 in the circumferential direction is formed by the locking wall portion 417 and the pair of legs 418. Note that the second engagement portion may be provided with only one leg portion 418. In this case, the through hole 410a is not formed in the second engagement portion, and the second engagement portion has a cantilever structure. The engaging claw portion 413 is capable of passing through the through hole 410a of the second engaging portion 410 (between the left joint accommodating member 110L and the locking wall portion 417). The hook step portion 409L engages with the locking wall portion 417 in the circumferential direction.

[0124] 11 and 12, the clamping portion 406 is plate-shaped. The clamping portion 406 is provided on the inner surface of the right joint accommodating member 110R so as to face the arm portion 414 of the first engagement portion 409 in the radial direction. The clamping portion 25 protrudes toward the tip side F4 beyond the dividing boundary portion 35Rb. The clamping portion 25 clamps the dividing boundary portion of the left joint accommodating member 110L together with the arm portion 414 in the radial direction.

[0125] The left joint housing member 110L, the overlapping portion 105L, the clamping portion 406, and the engaging portions 409 and 410 provided on the left joint housing member 110L are integrally formed from synthetic resin such as polyvinyl chloride resin, olefin resin, ABS, etc. This synthetic resin is an elastic material. The color of this synthetic resin may be transparent or opaque. The right joint accommodating member 110R is similar to the left joint accommodating member 110L.

[0126] According to the fourth embodiment of the thermal insulation member 400 for a drain joint, the dividing boundary portions of the joint accommodating members 110L, 110R are mechanically connected to each other by a connecting engagement portion 405 having engagement portions 409, 410, so that the joint accommodating members 110L, 110R can be easily connected to each other regardless of the material from which the joint accommodating members 110L, 110R are formed.

[0127] The connecting engagement portion 405 has a first engagement portion 409 and a second engagement portion 410. Therefore, by engaging the first engagement portion 409 and the second engagement portion 410 with each other, the dividing boundary portions of the joint accommodating members 110L, 110R can be easily mechanically connected to each other. The second engagement portion 410 has a locking wall portion 417, and the first engagement portion 409 has an engagement claw portion 413 and an arm portion 414. The engagement between the locking wall portion 417 and the hooking step portion 409L can be released by elastically deforming the arm portion 414 radially inward. Then, the engagement claw portion 413 passes between the left joint accommodating member 110L and the locking wall portion 417, so that the right joint accommodating member 110R and the left joint accommodating member 110L can be separated from each other. On the other hand, when the arm portion 414 is elastically deformed radially inward, the engaging claw portion 413 is passed between the left joint accommodating member 110L and the locking wall portion 417 to release the deformation of the arm portion 414, the arm portion 414 restores its deformation radially outward, and the hooking step portion 409L engages with the locking wall portion 417. Therefore, the dividing boundary portions 35 of the joint accommodating members 110L, 110R can be mechanically coupled to each other with a simple configuration of the locking wall portion 417, the engaging claw portion 413, and the arm portion 414. This makes it easier to manufacture the drain joint heat insulation member 400.

[0128] Since the engaging claw portion 413 is formed with the tapered surface 413T, the engaging claw portion 413 can be easily inserted into the through hole 410a of the second engaging portion 410. The drain joint heat-insulating member 400 includes a clamping portion 406. The arm portion 414 and the clamping portion 406 can more reliably suppress the flow between the air layer 100A and the air outside the drain joint heat-insulating member 400 through the dividing boundary portion of the joint accommodating member pieces 35L and 35R.

[0129] The configuration of the heat-insulating member for a drain joint of this embodiment can be modified in various ways as described below. As in a first modified example of a heat insulation member for a drain joint 400A shown in FIGS. 13 and 14, a first overlapping portion 430 may be provided instead of the overlapping portion 105 and the sandwiching portion 406 of the heat insulation member for a drain joint 400. For example, the first overlapping portion 430 is formed in a plate shape and is disposed on the outer surface of the right joint accommodating member 110R. The first overlapping portion 430 is disposed with a shifted position along the dividing boundary of the right joint accommodating member 110R with respect to the arm portion 414 (first engaging portion 409). The first overlapping portion 430 contacts the outer surface of the left joint accommodating member 110L. The length by which the first overlapping portion 430 extends from the dividing boundary of the right joint accommodating member 110R toward the tip side F4 will be described in the process of engaging the first engaging portion 409 and the second engaging portion 410.

[0130] The first overlapping portion 430 and the arm portion 414 are disposed at a dividing boundary of the right joint accommodating member 110R with their positions shifted along the dividing boundary. Therefore, when the arm portion 414 elastically deforms in the radial direction, the first overlapping portion 430 moves in the radial direction in conjunction with the deformation.

[0131] 15, in the drain joint heat insulation member 400A, when the first engagement portion 409 and the second engagement portion 410 are engaged with each other to connect the divided boundary portions of the joint accommodating members 110L and 110R from a state in which the joint accommodating members 110L and 110R are separated, the first overlapping portion 430 comes into contact with the outer surface of the left joint accommodating member 110L before the engagement claw portion 413 comes into contact with the locking wall portion 417. As a result, the first overlapping portion 430 rides up onto the outer surface of the left joint accommodating member 110L.

[0132] In the drain joint heat insulation member 400A of the first modification, after the first overlapping portion 430 comes into contact with the outer surface of the left joint accommodating member 110L, the arm portion 414 elastically deforms radially inward as a result of the engagement claw portion 413 coming into contact with the locking wall portion 417, and in conjunction with this, the first overlapping portion 430 also tries to move radially inward. However, the movement of the first overlapping portion 430 is restricted by the outer surface of the left joint accommodating member 110L. Thereafter, as shown in FIG. 16, when the engagement claw portion 413 passes through the through hole 41a, the arm portion 414 elastically deforms radially inward, but the radially inward movement of the first overlap portion 430 is restricted by the outer surface of the left joint accommodating member 110L. Therefore, when the dividing boundary portions of the joint accommodating members 110L and 110R are connected to each other, the first overlapping portion 430 can be easily brought into contact with the outer surface of the left joint accommodating member 110L. This first overlapping portion 430 can suppress the flow between the air layer 100A and the air outside the drain joint heat-insulating member 400A through the dividing boundary portions of the joint accommodating members 110L and 110R.

[0133] In the drain joint heat insulation member 400B of the second modification shown in Fig. 17, when the division boundary portions of the joint accommodating members 110L and 110R are connected to each other, the engaging claw portion 413 comes into contact with the locking wall portion 417, and then the first overlapping portion 430 comes into contact with the outer surface of the left joint accommodating member 110L. Therefore, in conjunction with the arm portion 414 elastically deforming radially inward as a result of the engaging claw portion 413 coming into contact with the locking wall portion 48, the first overlapping portion 430 also moves radially inward. The moved first overlapping portion 430 hits the left joint accommodating member 110L, making it difficult to bring the first overlapping portion 430 into contact with the outer surface of the left joint accommodating member 110L.

[0134] As shown in Fig. 18, a drain joint heat insulation member 400C of a third modified example may be provided with a first engagement portion 435, a protrusion (second engagement portion) 436, and a second overlapping portion 437 instead of the first engagement portion 409, the second engagement portion 410, and the overlapping portion 105 of the drain joint heat insulation member 400A. The protrusion 436 is provided on the outer surface of the left joint accommodating member 110L. The protrusion 436 protrudes radially outward from the outer surface of the left joint accommodating member 110L. In the first engagement portion 409, a hooking step portion 435L is formed between the engagement claw portion 413 and the arm portion 414 by the engagement claw portion 413 protruding radially inward beyond the arm portion 414. The hooking step portion 435L engages with the protrusion 436 in the circumferential direction.

[0135] The second overlapping portion 437 is disposed on the right joint accommodating member 110R at a position shifted along the dividing boundary of the right joint accommodating member 110R with respect to the arm portion 414. The second overlapping portion 437 protrudes toward the tip side F4 beyond the dividing boundary of the right joint accommodating member 110R. The second overlapping portion 437 contacts the outer surface of the left joint accommodating member 110L.

[0136] In the drain joint heat insulation member 400C of the third modification, the arm portion 414 is elastically deformed radially outward to release the engagement between the protrusion 436 and the hook step portion 435L. Then, the right joint housing member 110R and the left joint housing member 110L can be separated. On the other hand, in the drain joint heat insulation member 400C, when the first engagement portion 435 and the protrusion 436 are engaged to connect the divided boundary portions of the joint accommodating members 110L and 110R from a state in which the joint accommodating members 110L and 110R are separated, the following process is performed. That is, as shown in Fig. 19, when the arm portion 414 is elastically deformed radially outward, the engagement claw portion 44 is caused to climb over the protrusion 66 and the deformation of the arm portion 45 is released, the arm portion 45 is restored and deformed radially inward, and the hook step portion 65L engages with the protrusion 436 in the circumferential direction. Therefore, with a simple configuration of the projection 436, the engaging claw portion 413, and the arm portion 414, the divided boundary portions of the joint accommodating members 110L, 110R can be mechanically coupled to each other.

[0137] A fourth modified example of a heat insulation member 400D for a drain joint shown in Figs. 20 and 21 includes a protrusion 440 and an engagement rib portion 441 instead of the first engagement portion 435 and the protrusion 436 of the heat insulation member 400C for a drain joint of the third modified example. The protrusion 440 is provided on the outer surface of the dividing boundary of the right joint accommodating member 110R. It is preferable that the protrusion 440 is provided over the entire length of the dividing boundary. The engagement rib portion 441 has a main body 444 and an engagement rib 445. The main body 444 is provided on the outer surface of the dividing boundary of the left joint accommodating member 110L. The main body 444 protrudes toward the tip side beyond the dividing boundary of the left joint accommodating member 110L. The engagement rib 445 protrudes radially inward from the tip end of the main body 444. The engagement rib portion 441 is preferably provided over the entire length of the dividing boundary of the left joint accommodating member 110L. The protrusion 440 and the engaging rib 445 of the engaging rib portion 441 engage with each other in the circumferential direction. In the drain joint heat insulation member 400D of the fourth modified example configured in this manner, the joint accommodating members 110L, 110R can be engaged with each other over the entire length of the dividing boundary portion. Alternatively, the protrusion 440 may be provided on the left joint accommodating member 110L, and the engagement rib portion 441 may be provided on the right joint accommodating member 110R.

[0138] <Fifth embodiment> Hereinafter, a fifth embodiment of the present invention will be described with reference to FIGS. 22 and 23, the heat insulating member 500 for a drain joint of this embodiment has a connecting engagement part 501 instead of the connecting engagement part 150 in the heat insulating member 100 for a drain joint of the first embodiment. The connecting engagement part 501 is preferably provided at each end of the heat insulating member 500 for a drain joint that holds the receiving member 60 and the flexible hose 6. The connecting engagement portion 501 for holding the receiving member 60 will be described below.

[0139] The connecting engagement portion 501 has a groove 502 formed on the outer surface of the end portion of the joint accommodating members 110L, 110R that connects the divided boundary portions, and a cap nut 503 that connects the joint accommodating members 110L, 110R to each other. The groove 502 extends in the circumferential direction. In this embodiment, the groove 502 is preferably formed in a spiral shape around the first pipe axis O1 across the joint housing members 110L and 110R. A female screw 505 is formed by the spirally formed groove 502. As shown in FIG. 22, in the joint accommodating members 110L and 110R in which the dividing boundary portions are connected to each other, it is preferable that the bottom surface of the groove 502 becomes more distant from the first pipe axis O1 as it moves from one end side F to the other end side R (from the end portion to the center) along the first pipe axis O1. The groove 502 may be formed in only one of the joint accommodating members 110L, 110R.

[0140] The cap nut 503 has a cylindrical member 507 and a protrusion 508. The cylindrical member 507 has a side wall 509 and a bottom wall 510. The side wall 509 covers, from the radially outer side, the end portion of one end side F of the joint accommodating members 110L, 110R which are formed in a cylindrical shape and connect the divided boundary portions. The bottom wall 510 is formed in an annular shape, and is provided at an end portion of the side wall 509 on one end side F. The bottom wall 510 protrudes from the end portion of the side wall 509 toward the inside in the radial direction. The protrusion 508 is provided on the inner circumferential surface of the side wall 509. The protrusion 508 is engageable with the female thread 505 (groove 502). The protrusion 508 is preferably formed in a spiral shape around the first tube axis O1. A male thread 511 is formed by the protrusion 508 formed in a spiral shape.

[0141] In the drain joint heat-insulating member 500 of the present embodiment configured as described above, the ends of the joint accommodating members 110L, 110R that connect the dividing boundaries are covered from the radially outside by the cylindrical member 507, and the protrusions 508 are engaged with the grooves 502 formed in the ends of the joint accommodating members 110L, 110R. This makes it difficult for the cylindrical member 507 to move in the direction along the first pipe axis O1 relative to the ends of the joint accommodating members 110L, 110R, and the dividing boundaries of the joint accommodating members 110L, 110R can be easily mechanically connected to each other. As the protrusion 508 moves from the one end side F to the other end side R, the protrusion 508 comes into stronger contact with the bottom surface of the groove 502. Therefore, as the cylindrical member 507 is tightened around the first pipe axis O1 so that the protrusion 508 moves toward the other end side R, the cylindrical member 507 provided with the protrusion 508 can be more firmly fixed to the ends of the joint accommodating members 110L, 110R in which the grooves 502 are formed.

[0142] 24, a connecting engagement part 501A may be provided instead of the connecting engagement part 501 of the heat insulation member for a drain joint 500 of the fifth embodiment. The connecting engagement part 501A has a sealing member 514 in addition to each configuration of the connecting engagement part 501. The sealing member 514 is formed in an annular shape from an elastic material such as synthetic resin. The sealing member 514 is disposed between the end faces of the one end side F of the joint accommodating members 110L, 110R and the bottom wall 510. The inner peripheral edge of the sealing member 514 contacts the outer surface of the socket member 60 of the elbow type joint member 40. The sealing member 514 seals between the joint accommodating members 110L, 110R and the socket member 60 (elbow type joint member 40).

[0143] In the first modified example of the heat-insulating member 500A for a drain joint configured in this manner, the sealing member 514 can suppress the flow between the air layer 100A and the air outside the heat-insulating member 500A for a drain joint through the space between the joint accommodating members 110L, 110R and the elbow-type joint member 40. The groove may also be a so-called bayonet groove.

[0144] Sixth Embodiment A sixth embodiment of the present invention will now be described with reference to FIGS. As shown in Figs. 25 and 26, a heat insulating member 600 for a drain joint of this embodiment includes a connecting engagement portion 601 instead of the connecting engagement portion 150 in the heat insulating member 100 for a drain joint of the first embodiment. The connection engagement portion 601 has a third engagement portion 603 provided on the joint accommodating members 110L and 110R, and a cap 604. The third engagement portion 603 is a protrusion provided on the outer surface of the joint accommodating members 110L, 110R. The third engagement portion 603 is preferably provided on the outer surface of the joint accommodating members 110L, 110R over the entire circumference in the circumferential direction. The cap 604 includes the cylindrical member 507 and a fourth engagement portion 607 . The fourth engagement portion 607 is a protrusion provided on the inner surface of the side wall 509 (the cylindrical member 507). The fourth engagement portion 607 is preferably provided on the side wall 509 over the entire circumference in the circumferential direction. The fourth engagement portion 607 is capable of engaging with the third engagement portion 603 in the direction of the first tube axis O1.

[0145] In the drain joint heat-insulating member 600 of the present embodiment configured as described above, the ends of the joint accommodating members 110L, 110R that connect the dividing boundaries are covered from the radially outer side by the cylindrical member 507, and the fourth engaging portion 607 provided on the cylindrical member 507 is engaged in the first pipe axis O1 direction with the third engaging portion 603 provided on the joint accommodating members 110L, 110R. This makes it difficult for the cylindrical member 507 to move in the first pipe axis O1 direction relative to the ends of the joint accommodating members 110L, 110R, and the dividing boundaries of the joint accommodating members 110L, 110R can be easily mechanically connected to each other.

[0146] 27, a connecting engagement part 601A may be provided instead of the connecting engagement part 601 of the sixth embodiment. The connecting engagement part 601A has the sealing member 514 in addition to the respective components of the connecting engagement part 601. The heat insulation member for a drain joint 600A of the first modified example can also achieve the same effects as the heat insulation member for a drain joint 500A of the first modified example of the above embodiment.

[0147] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the invention.

[0148] For example, in the above embodiment, a case has been described in which an air layer is formed between the thermal insulation material 100 for a drain joint and the elbow body 50 over the entire length of the elbow body 50 in the pipe axis O direction and around the entire circumference of the outer circumferential surface. However, a configuration in which no air layer is formed may be adopted in which the elbow body 50 and the thermal insulation material 100 for a drain joint come into contact in part of the pipe axis O direction and circumferential direction, or a configuration in which no air layer is formed may be adopted in which the air layer is filled with fiber-based insulation material or foamed resin-based insulation material.

[0149] In the above embodiment, the air layer formed around the drain joint heat-insulating member 100 and the elbow body 50 is 2 mm thick, but the thickness of the air layer can be set arbitrarily, and may be set to be greater than 2 mm or less than 2 mm. Also, the thickness may be set to different thicknesses in different areas around the elbow body 50.

[0150] Furthermore, in the above embodiment, a description has been given of the case where the sealing means tightly contacts and holds the piping 5 or flexible hose 6 connected to the elbow-type joint member (drain joint) 40, but the air flow between the inside and outside of the joint accommodating member may be sealed at a portion other than the outer circumferential surface of the piping 5 or flexible hose 6. For example, the drain hose holding tubular portion 113 may hold the outer circumferential surface of the drain hose 5 instead of holding the outer circumferential surface of the receiving member 60, and the flexible hose holding tubular portion 114 may hold the outer circumferential surface of the joint main body 51 or the flange portion 53B instead of holding the outer circumferential surface of the flexible hose 6.

[0151] In addition, in the above embodiment, a case has been described in which an overlapping portion 105 is formed on the outer edge portion (boundary portion, division boundary portion) 102 of the thermal insulation member 100 for a drain joint. However, whether or not to form the overlapping portion 105 on the outer edge portion (boundary portion, division boundary portion) 102 may be set arbitrarily, and for example, a configuration in which the end faces of the members are butted against each other may be used.

[0152] In the above embodiment, the case has been described in which the connecting engagement portion (connecting means) 150 that connects the drain joint heat insulation member 100 includes the engaging portion 151 and the engaged portion 155, but it is possible to arbitrarily set whether the connecting engagement portion (connecting means) includes an engaging portion and an engaged portion, and for example, the members may be connected to each other by a connecting means other than the engaging portion 151 and the engaged portion 155. In addition, the number and arrangement of the connecting engagement portions (connecting means) can be arbitrarily set.

[0153] In the above embodiment, the case where the drain heat-insulating joint 10 includes the elbow-type joint member (drain joint) 40 has been described, but the configuration of the elbow-type joint member (drain joint) can be set arbitrarily.

[0154] 28, the outer surface 76A of the locking claw body 76 of the header nut 70, with which the locking wall portion 55L of the elbow body 50 locks, is preferably inclined so as to approach the first pipe axis O1 side toward the front side C1 in the fastening direction when the header nut 70 is fastened. The outer surface 55M of the locking wall portion 55L, with which the outer surface 76A of the locking claw body 76 locks, is preferably inclined so as to approach the first pipe axis O1 side toward the front side C1 in the fastening direction. The header nut 70 is tightened to the outer peripheral threads 52S of the elbow body 50 by rotating it around the first pipe axis O1 toward the front side C1 in the tightening direction. By configuring the outer surfaces 76A, 55M in this manner, the locking claw body 76 is less likely to come off the locking wall portion 55L.

[0155] In addition, within the scope of the invention, it is possible to replace the components in the above-described embodiments with well-known components, and the above-described embodiments may be combined as appropriate. [Explanation of symbols]

[0156] O1 Pipe axis (axis) of the drain joint on the air conditioner side O2 Drain up side pipe shaft O Pipe shaft including the curved pipe section of the drain joint 100A Air gap 1. Air conditioning drain piping 10 Drain insulation joint 40 Elbow type joint material (drain joint) 50 Elbow body 100, 200, 300, 400, 400A, 400B, 400C, 400D, 500, 500A, 600, 600A Drain joint insulation material 113 Drain hose retaining tube (sealing part) 114 Flexible hose holding tube (sealing part) 110 Joint housing member (joint housing member, member) 110L Left side joint housing member (joint housing member, member, other of multiple members) 110R Right side joint housing member (joint housing member, member, at least one of a plurality of members) 210 Joint housing member (joint housing member, member) 210A Lower joint housing member (joint housing member, member) 210B Upper joint housing member (joint housing member, member) 102, 102L, 102R Outer edge (boundary, division boundary) 105, 105L, 105R overlapping part 150, 160, 501, 501A, 601, 601A Connection engagement part (connection means) 151, 161 Engagement portion 152 Engagement claw 152L Lock step (hook step) 152T Tapered surface (tapered part) 155, 165 Engaged part 320 Hinge part (hinge) 406 Clamp 409, 435 First engagement part 409L, 435L Hook step 410 Second engagement part 413 Engagement claw part 414 Arm section 417 Locking wall 430 First overlapping part 436 Protrusion (second engagement portion) 437 Second overlapping section 502 Groove 507 Cylindrical members 508 Protrusion 514 Sealing member 603 Third engagement part 607 Fourth engagement part

Claims

1. a joint housing member that is made up of a plurality of members and cooperates to form a space inside in which the drain joint can be housed, and dividing boundaries formed at at least a part of the boundaries between the members are separated to form an opening through which the drain joint can pass; A connecting means for detachably connecting corresponding dividing boundary portions of the members to each other; an air layer forming means arranged inside the joint housing member and forming an air layer between the joint and the drain joint; and a sealing means for suppressing air flow between the air layer and the outside. A heat-insulating member for a drain joint.

2. The heat-insulating member for a drain joint according to claim 1, The sealing means is The drain joint is configured to hold a pipe or a hose connected to the drain joint and to be in close contact with the outer circumferential surface of the pipe or the hose. A heat-insulating member for a drain joint.

3. The heat-insulating member for a drain joint according to claim 1 or 2, An overlapping portion is formed on the dividing boundary. A heat-insulating member for a drain joint.

4. The heat-insulating member for a drain joint according to any one of claims 1 to 3, The connecting means is The engaging portion is disposed on one of the corresponding members and the engaged portion is disposed on the other of the corresponding members, and the engaging portion is disposed on the other of the corresponding members, The engaging portion has an engaging claw portion and an arm portion formed on a base end side of the engaging claw portion, and the engaging claw portion has a tapered portion that extends outwardly toward the base end side and a hook step portion formed on the base end side of the tapered portion, The engaged portion has a locking wall portion that is disposed at a position where the engaging claw portion can pass therethrough when the engaging claw portion is displaced inwardly and where the hook step portion can be locked when the displacement of the engaging claw portion is released. A heat-insulating member for a drain joint.

5. The heat-insulating member for a drain joint according to any one of claims 1 to 4, The drain joint includes a pipe axis of the drain joint and an elbow member constituting the drain joint is provided with two members divided by a dividing boundary portion disposed on a dividing surface which includes the pipe axis and divides the elbow member into left and right parts. A heat-insulating member for a drain joint.

6. The heat-insulating member for a drain joint according to any one of claims 1 to 4, A thermal insulation member for a drain joint comprising two members divided in the vertical direction by a dividing boundary portion that is perpendicular to a dividing surface that includes the pipe axis of the drain joint and divides the elbow member constituting the drain joint into left and right parts including the pipe axis and is located on a curved surface along the pipe axis of the drain joint.

7. The heat-insulating member for a drain joint according to any one of claims 1 to 6, The connecting means is A first engagement portion provided on at least one of the plurality of members; A second engaging portion provided on another of the plurality of members and engaging with the first engaging portion; having the second engagement portion has a locking wall portion provided at a position spaced outward from other outer surfaces of the plurality of members, The first engagement portion is an engaging claw portion that can pass between the other of the plurality of members and the locking wall portion; an arm portion formed on a base end side of the engaging claw portion and connected to at least one of the plurality of members; having Between the engaging claw portion and the arm portion, a hook step portion is formed by the engaging claw portion protruding outward beyond the arm portion, The hook step portion engages with the locking wall portion. A heat-insulating member for a drain joint.

8. The heat-insulating member for a drain joint according to any one of claims 1 to 6, The connecting means is A first engagement portion provided on at least one of the plurality of members; A second engaging portion provided on another of the plurality of members and engaging with the first engaging portion; having the second engagement portion is a protrusion provided on an outer surface of another of the plurality of members, The first engagement portion is An engagement claw portion; an arm portion formed on a base end side of the engaging claw portion and connected to at least one of the plurality of members; having Between the engaging claw portion and the arm portion, a hook step portion is formed by the engaging claw portion protruding inward beyond the arm portion, The hook step portion engages with the protrusion. A heat-insulating member for a drain joint.

9. The heat-insulating member for a drain joint according to any one of claims 1 to 6, The ends of the plurality of members that connect the dividing boundaries are cylindrical, The connecting means is A groove is formed on an outer surface of an end portion of the plurality of members connecting the dividing boundary portions, the groove extending in a circumferential direction of the end portion; a cylindrical member that covers the ends of the plurality of members that connect the dividing boundaries from a radially outer side of the ends; a protrusion provided on an inner circumferential surface of the cylindrical member and capable of engaging with the groove; have A heat-insulating member for a drain joint.

10. The heat-insulating member for a drain joint according to claim 9, In the plurality of members connected to each other at the dividing boundary portions, the bottom surface of the groove becomes farther away from the axis from the end portion toward the center portion along the axis of the plurality of members. A heat-insulating member for a drain joint.

11. The heat-insulating member for a drain joint according to any one of claims 1 to 6, The ends of the plurality of members that connect the dividing boundaries are cylindrical, The connecting means is A third engagement portion provided on at least one of the plurality of members; a cylindrical member that covers the ends of the plurality of members that connect the dividing boundaries from a radially outer side of the ends; a fourth engaging portion provided on the cylindrical member and capable of engaging with the third engaging portion in an axial direction of the plurality of members connecting the dividing boundaries; have A heat-insulating member for a drain joint.

12. A heat-insulating member for a drain joint according to any one of claims 1 to 11, A drain joint housed in the drain joint heat-insulating member.

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