Manifold

Abstract

To provide a manifold in which peeling is hard to occur in a joint part.SOLUTION: In a manifold, a flow path space is formed by integrating a first joint body 15 of a first member 10 and a second joint body 25 of a second member 20 by welding of joint surfaces. The first joint body 15 and the second joint body 25 are joined by a welding surface having an uneven shape in which a first uneven region E1 formed in a first joint surface 10T of the first joint body 15 and a second uneven region E2 formed in a second joint surface 20T of the second joint body 25 fit to each other.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a manifold formed by welding members together. [Background technology]

[0002] Patent Document 1 discloses a reservoir in which a first section and a second section are joined at a reservoir interface. Patent Document 1 describes that the reservoir interface can be joined by, for example, a welded interface, an adhesive interface, a hot-formed interface, a hot-plate welded interface, a thermally welded interface, a sonic welded interface, an ultrasonic welded interface, or the like. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2019-520261 Summary of the Invention [Problem to be solved by the invention]

[0004] The reservoir interface described in Patent Document 1 is formed by joining a plurality of separate sections together to form a required structure.

[0005] In particular, FIG3D in Figure 3 of Patent Document 1 shows a joining configuration in which two sections of the reservoir are joined at a linear reservoir interface. Therefore, when joining by, for example, heat welding, flat surfaces are welded, and there is a concern that the welded portion may peel off if the internal pressure of the reservoir increases.

[0006] For these reasons, there is a demand for a manifold that is less susceptible to peeling at the welded portions. [Means for solving the problem]

[0007] A characteristic configuration of the manifold according to the present invention is a manifold in which a first joining body formed on a first resin member and a second joining body formed on a second resin member are integrated by welding their respective joining surfaces, and a flow path space is formed between the integrated first and second members, and the first joining body and the second joining body are joined by an unevenly shaped welding surface in which a first uneven region formed on the first joining surface of the first joining body and the second uneven region formed on the second joining surface of the second joining body fit together.

[0008] According to this configuration, the first and second joining bodies are integrated by welding with an uneven welding surface formed by fitting the first uneven region of the first joining surface and the second uneven region of the second joining surface together. This provides a wide welding area and maintains a strong welding state. This results in a manifold that is less likely to peel at the welded portion. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. [Figure 2] 1 is a bottom view of the upper housing showing the lower opening. [Figure 3] FIG. 2 is a plan view of the lower housing showing the upper opening. [Figure 4] FIG. 2 is a cross-sectional view of a manifold. [Figure 5] FIG. 4 is a cross-sectional view showing the upper housing and the lower housing separated from each other. [Figure 6] 10 is a diagram showing the side view shapes of an upper joint surface and a lower joint surface. FIG. [Figure 7] FIG. 4 is a diagram showing the shape of the welding surface as viewed from the side. [Figure 8] FIG. 10 is a cross-sectional view of the upper and lower joining surfaces in a welded state. [Figure 9] FIG. 10 is a diagram showing an enlarged side view of the welded surface and the flash portion. [Figure 10]FIG. 10 is a cross-sectional view showing the shape in the width direction of the upper joining surface and the lower joining surface in the separated state in another embodiment (a). [Figure 11] FIG. 10 is a cross-sectional view showing the shape of the welded surface between the upper joining surface and the lower joining surface in the width direction in another embodiment (a). [Figure 12] FIG. 10 is a cross-sectional view showing the shape in the width direction of the upper joining surface and the lower joining surface in the separated state in another embodiment (b). [Figure 13] FIG. 10 is a cross-sectional view showing the shape of the welded surface between the upper joining surface and the lower joining surface in the width direction in another embodiment (b). [Figure 14] 10 is a diagram showing the shapes of an upper housing and a lower housing in a side view in another embodiment (c). FIG. [Figure 15] FIG. 10 is a diagram showing the shape of the welding surface in a side view in another embodiment (c). [Figure 16] 10 is a diagram showing the shapes of an upper housing and a lower housing in a side view in another embodiment (d). FIG. [Figure 17] FIG. 10 is a diagram showing the shape of the welding surface in a side view in another embodiment (d). DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of a manifold according to the present invention will be described with reference to the drawings. In this embodiment, a manifold configured to control the flow of a cooling medium in an electric vehicle is described. However, the manifold is not limited to the following embodiment and various modifications are possible without departing from the spirit of the invention.

[0011] [Basic configuration] As shown in Figure 1, a manifold M is configured that includes multiple cylindrical ports 1, a pair of valves 2, and a pair of pumps 3, and that has multiple flow path spaces LS (see Figures 2 to 4) formed therein through which fluid flows.

[0012] The manifold M controls coolant (hereinafter also referred to as "fluid") as a cooling medium that flows between cooling targets (not shown) such as a battery, inverter, and traction motor mounted on an electric vehicle and heat dissipation units (not shown) such as a radiator and chiller. Note that the coolant used may be a long-life coolant (LLC) containing ethylene glycol, propylene glycol, or the like.

[0013] In the manifold M, a pair of valves 2 and a pair of pumps 3 are independently controlled based on signals from sensors such as a battery temperature sensor (not shown) that measures the temperature of the battery and a fluid temperature sensor (not shown) that measures the temperature of the fluid. Through this control, a cooling target is selected and cooling water is supplied, and the flow rate of the cooling water to the supply target is set.

[0014] Electric vehicles include, for example, hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), battery electric vehicles (BEVs), and fuel cell electric vehicles (FCEVs).

[0015] [Manifold] The manifold M is provided on the electric vehicle in the position shown in Fig. 1. In the following explanation, the vertical positional relationship and the like will be explained based on this position. Furthermore, the left and right ends in the position shown in Fig. 1 may be described as both ends.

[0016] As shown in Figures 1 to 5, the manifold M has a lower opening 10S of an upper housing 10 (an example of a first member) made of a thermoplastic resin and an upper opening 20S of a lower housing 20 (an example of a second member) made of the same thermoplastic resin material as the upper housing 10, which are integrated by thermal welding to form multiple flow path spaces LS inside.

[0017] The upper housing 10 (first member) and the lower housing 20 (second member) are molded products made of glass fiber reinforced thermoplastic resin. The fibers used for reinforcement are not limited to glass fibers, and high-strength fibers such as carbon fibers may also be used. Thermal welding will be described later.

[0018] The pump 3 of the manifold M is a unit that combines a pump motor and an impeller driven by the pump motor, and is inserted into holes at both ends of the upper housing 10 and connected and fixed to the upper housing 10 by flanges 4.

[0019] The pair of valves 2 accommodates a rotary type valve body 6 in a cylindrical wall portion 12 on the top surface of an upper housing 10, and includes a valve driver 7 that controls the rotational attitude of the valve body 6.

[0020] Each valve 2 controls the supply and discharge of cooling water between the plurality of flow path spaces LS and the plurality of cylindrical ports 1 by rotating the valve body 6 around the vertical valve axis X.

[0021] [Upper housing] 1, 2, and 4, the upper housing 10 is rectangular in plan view, and a vertical wall portion 11 is formed in the area surrounding the outer periphery. This vertical wall portion 11 has multiple cylindrical ports 1 that protrude outward in a horizontal position.

[0022] 1 and 2, the upper housing 10 has a cylindrical wall portion 12 formed around the valve axis X, and a bottom plate 13 formed integrally with the lower end of the cylindrical wall portion 12. The bottom plate 13 has an annular portion 14 on the bottom side that is coaxial with the valve axis X.

[0023] The upper housing 10 has a plurality of partition walls 15 that connect the vertical wall 11 and the cylindrical wall 12 to form a plurality of flow path spaces LS between the vertical wall 11 and the cylindrical wall 12. The valve body 6 is inserted from above and abuts against the bottom plate 13 to determine the lower end position of the cylindrical wall 12.

[0024] As shown in Figures 2 and 5, an upper joint surface 10T (an example of a first joint surface) is formed at the lower ends of the vertical wall portion 11, the tubular wall portion 12, the annular portion 14, and the partition wall portion 15 provided in the lower opening 10S of the upper housing 10.

[0025] The upper bonding surface 10T (first bonding surface) has a first uneven area E1 formed at its lower end as shown in Fig. 6. In the following description, the vertical wall portion 11, the tubular wall portion 12, the annular portion 14, and the partition wall portion 15 are each plate-shaped, and may be collectively referred to as a first bonding body.

[0026] In the following description, the thickness in the width direction of the partition wall portion 15, which is an example of the first bonding body, will be described as width T (see FIG. 8). The direction along this width T may also be referred to as the width direction. The first concave-convex region E1 will be described in detail later.

[0027] [Lower housing] As shown in FIGS. 1, 3 and 4, the lower housing 20 is rectangular in plan view, and includes a vertical rib 21 surrounding the outer periphery and a bottom wall 26 that are integrally formed.

[0028] The lower housing 20 has vertical wall ribs 21, tubular ribs 22, annular ribs 24, and multiple partition wall ribs 25 each protruding upward from the bottom wall 26 at positions facing the vertical wall portion 11, tubular wall portion 12, annular portion 14, and multiple partition wall portions 15 of the upper housing 10.

[0029] As shown in Figures 3 and 6, a lower joint surface 20T (an example of a second joint surface) is formed at the upper ends of the vertical wall rib 21, the tubular rib 22, the annular rib 24, and the partition wall rib 25 provided at the upper opening 20S of the lower housing 20.

[0030] This lower joint surface 20T (second joint surface) has a second uneven area E2 formed thereon, as shown in Fig. 6. In the following description, the vertical wall rib 21, the tubular rib 22, the annular rib 24, and the partition wall rib 25 are each plate-shaped, and may be collectively referred to as a second joint body.

[0031] In the following description, the thickness in the width direction of the partition rib 25, which is an example of the second bonding body, will be described as width T. The direction along this width T may also be referred to as the width direction. The second concave-convex region E2 will be described in detail later.

[0032] Furthermore, in this embodiment, as shown in FIG. 7, the boundary portion where the upper joining surface 10T and the lower joining surface 20T are thermally welded together is referred to as a welded surface MT.

[0033] [Upper and lower joint surfaces] Taking the partition wall portion 15 and the partition wall rib 25 as an example, as shown in Fig. 6, the upper joint surface 10T forms a first concave-convex region E1 in which rectangular first concave portions Q1 recessed upward and rectangular first convex portions P1 protruding downward are alternately arranged along the longitudinal direction of the lower surface of the partition wall portion 15 when viewed in a direction perpendicular to each of the surfaces of the partition wall portion 15 and the partition wall rib 25 (hereinafter sometimes referred to as a side view). In other words, multiple pairs of a first concave portion Q1 and a first convex portion P1 are arranged adjacent to each other in a row.

[0034] The first recessed portions Q1 and the first protruding portions P1 are formed across the entire width of the partition wall portion 15. The multiple first recessed portions Q1 and the multiple first protruding portions P1 are integrally formed on the bottom surface (upper joint surface 10T) of the partition wall portion 15 when the partition wall portion 15 is molded. The first recessed portions Q1 and the first protruding portions P1 are formed at adjacent positions with a set distance C and a set depth D.

[0035] The first uneven region E1, in which the first recesses Q1 and the first protrusions P1 are arranged alternately in this manner, is not limited to the partition wall portion 15, but is also similarly formed at the lower ends of the vertical wall portion 11, the tubular wall portion 12, and the annular portion 14.

[0036] Correspondingly, the lower joint surface 20T has a second uneven region E2 in which rectangular second recesses Q2 recessed downward and rectangular second protrusions P2 protruding upward are alternately arranged along the longitudinal direction of the upper surface of the partition rib 25 in a side view. The second uneven region E2 and the first uneven region E1 are rectangular and are formed to fit into each other. In other words, multiple pairs of second recesses Q2 and second protrusions P2 are arranged adjacent to each other in a row.

[0037] The second recesses Q2 and the second protrusions P2 are formed across the entire width of the partition wall portion 15. The second recesses Q2 and the second protrusions P2 are integrally formed on the upper surface (lower joint surface 20T) of the partition wall rib 25 when the partition wall rib 25 is molded. The second recesses Q2 and the second protrusions P2 are formed continuously at adjacent positions with a set interval C and a set depth D.

[0038] The second uneven region E2 in which the second recesses Q2 and the second protrusions P2 are arranged alternately in this manner is not limited to the partition rib 25, but is also similarly formed at the upper ends of the vertical wall rib 21, the tubular rib 22, and the annular rib 24.

[0039] The first uneven region E1 may be formed by cutting after the upper housing 10 is molded. Similarly, the second uneven region E2 may be formed by cutting after the lower housing 20 is molded.

[0040] [Welding process] As shown in Figure 6, the welding process involves opposing the upper joining surface 10T (first uneven area E1) of the lower opening 10S of the upper housing 10 to the lower joining surface 20T (second uneven area E2) of the upper opening 20S of the lower housing 20, and heating them by placing an infrared heater 35 between them.

[0041] In the welding process, after confirming that the resin of the upper joining surface 10T and the lower joining surface 20T has exceeded its melting point due to heating, the infrared heater 35 is released and the upper housing 10 and the lower housing 20 are moved relative to each other in the joining direction (up and down). This causes the second convex portion P2 of the second concave-convex region E2 to fit into the first concave portion Q1 of the first concave-convex region E1, and the first convex portion P1 of the first concave-convex region E1 to fit into the second concave portion Q2 of the second concave-convex region E2. In this state, the upper housing 10 and the lower housing 20 are joined together by applying an appropriate amount of pressure, and are integrated by thermal welding.

[0042] This thermal welding is ensured by mixing the molten resin in the fitting areas of the first uneven region E1 and the second uneven region E2. As shown in Fig. 7, in a side view, the welding surface MT is formed in a rectangular wave shape along the boundary between the first uneven region E1 and the second uneven region E2.

[0043] Furthermore, in the thermal welding, as shown in the cross section of Fig. 8, part of the molten resin flows out from the boundary between the first uneven region E1 and the second uneven region E2, forming flash portions 31 on both outer surfaces in the width direction of the partition portion 15 and the partition rib 25. The flash portions 31 are formed in the region along the welding surface MT, as shown in Fig. 9.

[0044] [Effects of the embodiment] In this way, by thermally welding the first uneven region E1 of the upper joint surface 10T of the upper housing 10 and the second uneven region E2 of the lower joint surface 20T of the lower housing 20, the uneven welding surface MT firmly joins the upper housing 10 and the lower housing 20 over a wide surface. This allows for the manufacture of a highly durable manifold M that does not deform even when stress that causes meandering or warping is applied.

[0045] Furthermore, when performing thermal welding, the first uneven area E1 and the second uneven area E2 fit together to determine the relative positional relationship between the upper housing 10 and the lower housing 20, thereby maintaining the upper housing 10 and the lower housing 20 in an appropriate positional relationship.

[0046] [Another embodiment] The present invention may be configured as follows in addition to the above-described embodiments (common numbers and symbols are used to designate components having the same functions as those in the embodiments).

[0047] (a) As shown in Figure 10, the upper joint surface 10T of the upper housing 10 is positioned so that the first recess Q1 and the first protrusion P1 are adjacent to each other in the thickness direction (direction along the width T) of the partition wall portion 15, thereby forming a first uneven region E1.

[0048] In addition, the lower joint surface 20T of the lower housing 20 is arranged so that the second recessed portion Q2 and the second protruding portion P2 are adjacent to each other in the width direction of the partition rib 25 (direction along the width T), thereby forming a second uneven region E2.

[0049] In this alternative embodiment (a), as in the description of the embodiment, the first uneven region E1 can be formed not only in the partition wall portion 15 but also in the lower ends of the vertical wall portion 11, the tubular wall portion 12, and the annular portion 14. Similarly, the second uneven region E2 can be formed not only in the partition wall rib 25 but also in the lower ends of the vertical wall rib 21, the tubular rib 22, and the annular rib 24.

[0050] With this configuration, after heating with an infrared heater 35 using a process similar to that described in the embodiment, the first uneven area E1 and the second uneven area E2 are moved relatively in a proximity direction to be thermally welded, so that the partition portion 15 and the partition rib 25 reach a welded state at the welding surface MT, as shown in Figure 11, and a flash portion 31 is formed by the molten resin flowing out from the boundary between the upper joining surface 10T and the lower joining surface 20T.

[0051] In addition, this welding determines the relative positional relationship in the width direction between the upper joint surface 10T and the lower joint surface 20T, and the upper housing 10 and the lower housing 20 are welded at the uneven welding surface MT, thereby achieving a highly accurate joint in the appropriate position.

[0052] (b) As shown in Figure 12, as a modified example of another embodiment (a), the upper joining surface 10T is formed by arranging a single first convex portion P1 that protrudes downward by a set width along the thickness direction (direction along the width T) of the partition portion 15 and a first concave portion Q1 that is positioned to sandwich the first convex portion P1 in the width direction in an adjacent positional relationship, thereby forming a first uneven region E1.

[0053] In the first concave-convex region E1, the width of the first convex portion P1 in the width direction of the partition portion 15 is set to a value larger than the width of the first concave portion Q1.

[0054] Correspondingly, the lower joint surface 20T is provided with a second recess Q2 recessed downward by a set width along the width direction (direction along the width T) of the partition rib 25, and a second protrusion P2 positioned to sandwich the recess Q2 in the width direction, which are arranged adjacent to each other to form a second uneven region E2.

[0055] In this other embodiment (b), as in the description of the embodiment, the first uneven region E1 can be formed not only in the partition wall portion 15 but also in the lower ends of the vertical wall portion 11, the tubular wall portion 12, and the annular portion 14. Similarly, the second uneven region E2 can be formed not only in the partition wall rib 25 but also in the lower ends of the vertical wall rib 21, the tubular rib 22, and the annular rib 24.

[0056] With this configuration, after heating with an infrared heater 35 using a process similar to that described in the embodiment, the first uneven area E1 and the second uneven area E2 are moved relatively in a proximity direction to be thermally welded, so that the partition portion 15 and the partition rib 25 reach a welded state at the welding surface MT, as shown in Figure 13, and a flash portion 31 is formed by the molten resin flowing out from the boundary between the upper joining surface 10T and the lower joining surface 20T.

[0057] This welding allows for strong welding because the relative positional relationship in the width direction between the upper joint surface 10T and the lower joint surface 20T is determined and the first recess Q1 and the second recess Q2 reach a deep fitting state. In addition, the relative positional relationship in the width direction with the lower joint surface 20T is determined, realizing highly accurate joining of the upper housing 10 and the lower housing 20 at the appropriate position.

[0058] (c) As shown in Figure 14, the upper joint surface 10T of the upper housing 10 is arranged along the longitudinal direction of the partition wall portion 15, with a trapezoidal first convex portion P1 whose width on the protruding side is smaller than that on the base end side, and a trapezoidal first concave portion Q1 whose shape corresponds to the first convex portion P1 but is upside down, in a continuous adjacent positional relationship, to form a first uneven region E1.

[0059] Correspondingly, the lower joint surface 20T of the lower housing 20 is configured such that a second recess Q2 into which the first protrusion P1 fits without gaps and a second protrusion P2 that fits without gaps into the first recess Q1 are continuously arranged in adjacent positions along the longitudinal direction of the partition rib 25 to form a second uneven region E2.

[0060] In this alternative embodiment (c), the first uneven region E1 has a first contact surface S1 that is obliquely positioned between the first convex portion P1 and the first concave portion Q1, and the second uneven region E2 has a second contact surface S2 that is obliquely positioned between the second concave portion Q2 and the second convex portion P2.

[0061] In the first uneven region E1, the first convex portion P1 and the first concave portion Q1 are continuous with a distance C, and the base end length Cb of the first concave portion Q1 is shorter than the base end length Ca of the first convex portion P1 within this distance C. Similarly, in the second uneven region E2, the second convex portion P2 and the second concave portion Q2 are continuous with a distance C, and the base end length Cb of the second concave portion Q2 is shorter than the base end length Ca of the second convex portion P2 within this distance C.

[0062] In this manner, in the alternative embodiment (c), the first uneven region E1 and the second uneven region E2 are heated to their melting temperatures by a process similar to that described in the embodiment, and the upper housing 10 and the lower housing 20 are relatively displaced in the joining direction, thereby achieving a welded state at the welding surface MT and achieving a strong joining over a wide welding surface, as shown in Fig. 15. In this joining, the multiple first abutment surfaces S1 and the multiple second abutment surfaces S2 are welded together.

[0063] (d) As shown in Figures 16 and 17, as a modified example of another embodiment (c), the upper joining surface 10T is configured such that a first triangular convex portion P1 having a pointed shape on the protruding side and a first trapezoidal concave portion Q1 having a wide opening side and a narrow base end side (upper side) are continuously arranged in an adjacent positional relationship to form a first uneven region E1.

[0064] In this first uneven region E1, the first convex portion P1 and the first concave portion Q1 are continuous with a distance C, similar to the first uneven region E1 in the alternative embodiment (c), and the two base end lengths Ca and Cb are equal to those in the alternative embodiment (c).

[0065] Furthermore, in the second uneven region E2, similar to the second uneven region E2 in the alternative embodiment (c), the second convex portion P2 and the second concave portion Q2 are continuous with a distance C, and the two base end lengths Ca and Cb are equal to those in the alternative embodiment (c). In particular, in this alternative embodiment (d), the first protrusion amount D1 of the first convex portion P1 is greater than the protrusion amount D2 of the second convex portion P2.

[0066] With this configuration, the first uneven region E1 and the second uneven region E2 are heated to their melting temperatures, and the upper housing 10 and the lower housing 20 are moved relatively in the joining direction. During this relative movement, the tip portions of the first protrusions P1 come into contact with the second recesses Q2, causing the tip portions of the first protrusions P1 to deform significantly, and the molten resin flows between the first contact surface S1 of the first uneven region E1 and the second contact surface S2 of the second uneven region E2, filling the gap between these contact surfaces and welding them together, thereby enabling a strong joint at the weld surface MT.

[0067] That is, because the tip of the first protrusion P1 is located close to the infrared heater 35 (see FIG. 6) during heating, it becomes hotter than other positions in the first uneven region E1 and is easily deformed when it comes into contact with the second recess Q2. As a result, the molten resin on the surface of the first contact surface S1 mixes with the molten resin on the surface of the second contact surface S2, creating a good bond.

[0068] In this alternative embodiment (d), when the upper housing 10 and the lower housing 20 are displaced relative to each other in the joining direction, they are fitted and welded in an optimal positional relationship. In addition, in the welded state, the first abutment surface S1 and the second abutment surface S2 are welded to each other, thereby achieving a strong joint over a wide welding surface MT.

[0069] (e) The convex portions and concave portions constituting the first uneven region E1 and the second uneven region E2 are not limited to the rectangular shapes described in the embodiment or the trapezoidal shapes described in the alternative embodiments (c) and (d), but can also be configured in smooth wavy or arc shapes, and as shown in the alternative embodiment (d), for example, it is also possible for some of the first concave portions Q1 and first convex portions P1 constituting the first uneven region E1 to be formed into irregular shapes.

[0070] (f) The upper joining surface 10T and the lower joining surface 20T can also be joined by vibration welding.

[0071] Furthermore, the configurations disclosed in the above embodiments (including other embodiments, the same applies below) can be applied in combination with configurations disclosed in other embodiments, as long as no contradictions arise. Furthermore, the embodiments disclosed in this specification are examples, and the embodiments of the present invention are not limited to these, and can be modified as appropriate within the scope that does not deviate from the purpose of the present invention.

[0072] In the above-described embodiment, the following configurations are envisioned. (1) A manifold M in which a first joint body (partition wall portion 15) formed on a first member (upper housing 10) made of resin and a second joint body (partition wall rib 25) formed on a second member (lower housing 20) made of resin are integrated by welding their respective joint surfaces, and a flow path space LS is formed between the integrated first member (upper housing 10) and second member (lower housing 20). The manifold is such that the first joint body (partition wall portion 15) and the second joint body (partition wall rib 25) are joined by an unevenly shaped welding surface MT in which a first uneven region E1 formed on the first joint surface (upper joint surface 10T) of the first joint body (partition wall portion 15) and a second uneven region E2 formed on the second joint surface (lower joint surface 20T) of the second joint body (partition wall rib 25) fit together.

[0073] As a result, the first joining body (upper joining surface 10T) and the second joining body (lower joining surface 20T) are integrated by the uneven welding surface MT, in which the first uneven region E1 of the first joining surface (upper joining surface 10T) and the second uneven region E2 of the second joining surface (lower joining surface 20T) fit together. This ensures a wide welding area and maintains a strong welding state.

[0074] (2) In the manifold M of (1), it is preferable that the first uneven region E1 is arranged in a position where multiple pairs of the first recess Q1 and the first protrusion P1 are adjacent to each other along the longitudinal direction of the first joining surface (upper joining surface 10T), and the second uneven region E2 is arranged in a position where multiple pairs of the second recess Q2 and the second protrusion P2 are adjacent to each other along the longitudinal direction of the second joining surface (lower joining surface 20T).

[0075] According to this, the first recess Q1 and the first protrusion P1 are arranged along the longitudinal direction of the first joint surface (upper joint surface 10T), and the second recess Q2 and the second protrusion P2 are arranged along the longitudinal direction of the second joint surface (lower joint surface 20T), and these are welded in a fitted state. As a result, even if a force is applied in the longitudinal direction, the upper housing 10 and the lower housing 20 will not peel apart, which would cause the joint surfaces to move apart.

[0076] (3) In the manifold M of (1) or (2), it is preferable that the first concave-convex region E1 arranges the first recess Q1 and the first convex portion P1 at positions adjacent to each other along the width direction of the first joining surface (upper joining surface 10T), and the second concave-convex region E2 arranges the second recess Q2 and the second convex portion P2 at positions adjacent to each other along the width direction of the second joining surface (lower joining surface 20T).

[0077] According to this, the first recess Q1 and the first protrusion P1 are arranged along the width direction of the first joint surface (upper joint surface 10T), and the second recess Q2 and the second protrusion P2 are welded in a fitted state along the width direction of the second joint surface (lower joint surface 20T). As a result, even if a force acts in these width directions, the upper housing 10 and the lower housing 20 will not peel apart, which would cause the joint surfaces to move apart.

[0078] (4) In the manifold M of any one of (1) to (3), it is preferable that the welding surface MT has a shape in which a rectangular convex portion fits into a rectangular concave portion.

[0079] As a result, since the welding surface MT is rectangular, it is easier to mold than, for example, one that is formed into a smooth wave shape, and the upper housing 10 and the lower housing 20 are positioned during heat welding, making it possible to improve the positioning accuracy of these. [Industrial Applicability]

[0080] The present invention can be used in a manifold. [Explanation of symbols]

[0081] 10: Upper housing (first member), 10T: Upper joint surface 10T (first joint surface), 11: Vertical wall portion (first joint body), 12: Cylindrical wall portion (first joint body), 14: Annular portion (first joint body), 15: Partition wall portion (first joint body), 20: Lower housing 20 (second member), 20T: Lower joint surface (second joint surface), 21: Vertical wall rib (second joint body), 22: Cylindrical rib (second joint body), 24: Annular rib (second joint body), 25: Partition wall rib (second joint body), E1: First uneven region, E2: Second uneven region, P1: First convex portion, Q1: First recess, P2: Second convex portion, Q2: Second recess, LS: Flow path space, M: Manifold, MT: Welding surface

Claims

1. A manifold in which a first bonded body formed on a first resin member and a second bonded body formed on a second resin member are integrated by welding their respective bonding surfaces together, and a flow path space is formed between the integrated first member and second member, A manifold in which the first joining body and the second joining body are joined by an uneven welding surface in which a first uneven region formed on a first joining surface of the first joining body and a second uneven region formed on a second joining surface of the second joining body are fitted together.

2. 2. The manifold according to claim 1, wherein the first uneven region is arranged such that a plurality of pairs of first recesses and first protrusions are adjacent to each other along the longitudinal direction of the first joining surface, and the second uneven region is arranged such that a plurality of pairs of second recesses and second protrusions are adjacent to each other along the longitudinal direction of the second joining surface.

3. 2. The manifold according to claim 1, wherein the first uneven region arranges first recesses and first protrusions adjacent to each other along the width direction of the first bonding surface, and the second uneven region arranges second recesses and second protrusions adjacent to each other along the width direction of the second bonding surface.

4. 4. The manifold according to claim 1, wherein the welding surface has a shape in which a rectangular convex portion fits into a rectangular concave portion.

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