Assembly

Abstract

To provide an assembly in which split bodies are connected firmly.SOLUTION: An assembly 10 connects abutting joint parts of a first split body 12 and a second split body 14 with an adhesive. The assembly 10 comprises: a protrusion part 22 provided at the abutting joint part of the first split body 12; a recess part 32 provided at the abutting joint part of the second split body 14 into which the protrusion part 22 is inserted; a through hole 34 penetrating a side wall of the recess part 32; a communication recess part 24 provided at a portion of the protrusion part 22 facing the through hole 34 and communicating with the through hole 34; and an adhesive resin part 16 formed of hardened adhesive, which spans the through hole 34 and the communication recess part 24.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an assembly. [Background technology]

[0002] One example of an assembly formed by combining two divided bodies is the cooling case described in Patent Document 1. In the cooling case described in Patent Document 1, the ends of the divided bodies are joined together with an adhesive. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Jpn. Jpn. Published No. 59-34505 Summary of the Invention [Problem to be solved by the invention]

[0004] Bonding with adhesives may not provide sufficient connection strength.

[0005] The present invention has been proposed in view of the above-mentioned problems associated with the conventional technology, and has an object to provide an assembly in which divided bodies are firmly connected. [Means for solving the problem]

[0006] A first embodiment of the assembly according to the invention comprises: An assembly in which the butt joints of the divided bodies are connected by adhesive, A protrusion is provided at an abutting portion of one of the divided bodies; a recess provided at the butted portion of the other divided body and into which the protrusion is inserted; a through hole penetrating a side wall of the recess; a communication recess provided at a portion of the protrusion facing the through hole and communicating with the through hole; The present invention is characterized in that it comprises an adhesive resin portion that spans the through hole and the communicating recess and is formed from the hardened adhesive.

[0007] A second aspect of the assembly according to the present invention is the assembly according to the first aspect, The communication recess may penetrate the protrusion.

[0008] A third aspect of the assembly according to the present invention is the assembly according to the first or second aspect, The recess forms a groove along the butted portion of the other divided body, The protrusion may be a wall that fits into the groove.

[0009] A fourth aspect of the assembly according to the present invention is any one of the first aspect, the second aspect, and the third aspect, The butt portion is provided on an outer edge of the assembly, The through hole is provided in an outer side wall of the recess, A distance between an outer side wall of the recess and the protrusion may be greater than a distance between an inner side wall of the recess and the protrusion.

[0010] A fifth aspect of the assembly according to the present invention is any one of the first aspect, the second aspect, the third aspect, and the fourth aspect, The communication recess may be formed as a groove along the butted portion of one of the divided bodies.

[0011] A sixth aspect of the assembly according to the present invention is any one of the first, second, third, fourth and fifth aspects, It may also be a duct mounted on a vehicle. Effect of the Invention

[0012] In the assembly according to the present invention, the divided bodies are firmly connected. [Brief description of the drawings]

[0013] [Figure 1] FIG. 2 is a schematic perspective view of a portion of an assembly according to an embodiment of the present invention. [Diagram 2] FIG. 4 is a schematic perspective view showing a part of a first divided body of the embodiment. [Diagram 3] FIG. 4 is a schematic perspective view showing a part of a second divided body of the embodiment. [Figure 4] FIG. 4 is a cross-sectional view showing a butted portion of the embodiment. [Diagram 5] FIG. 4 is a diagram for explaining assembly of a first divided body and a second divided body in the embodiment. [Figure 6] FIG. 11 is a cross-sectional view showing a first modified example of the communication recess. [Figure 7] FIG. 11 is a schematic perspective view showing a second modified example of the communication recess. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Next, the assembly according to the present invention will be described below with reference to the accompanying drawings, taking preferred embodiments as examples. Note that the embodiments and drawings described below are merely examples of the present invention, and are not intended to limit the present invention to these configurations, and may be modified as appropriate without departing from the spirit of the present invention. EXAMPLES

[0015] As shown in FIG. 1, the assembly 10 according to the embodiment includes a first divided body (one divided body) 12 and a second divided body (the other divided body) 14. In the assembly 10, the butt joints 20, 30 of the divided bodies 12, 14 are connected to each other by an adhesive. In other words, the assembly 10 can be said to have the butt joints 20, 30 provided on the outer edges of the divided bodies 12, 14 connected by an adhesive resin part 16 formed by a hardened adhesive. The assembly 10 is a cylindrical duct in which an air flow passage is formed inside by connecting the first divided body 12 and the second divided body 14. Such an assembly 10 can be used as a duct mounted on a vehicle such as an automobile or a motorcycle. In the air flow passage of the assembly 10, the direction of the flow of fluid from an inlet provided at one end of the assembly 10 to an outlet provided at the other end of the assembly 10 is called the air flow direction.

[0016] As shown in FIG. 2, the first divided body 12 includes a first main body 18 having a semicircular cross section cut in a direction intersecting the air flow direction, a first butt joint 20 extending outward from each of the outer edges (the both side edges that are the ends of the semicircle) of the first main body 18, and a protrusion 22 provided on the first butt joint 20. The first main body 18 is formed in an eaves gutter shape with a semicircular groove extending in the air flow direction. The first butt joint 20 is formed in a brim shape along the outer edge of the first main body 18. The protrusion 22 protrudes from the first butt joint 20 toward a second butt joint 30 side of the second divided body 14, which will be described later. The protrusion 22 is a wall body that is disposed in the center of the extension direction of the first butt joint 20 and continues along the outer edge of the first main body 18. For the first divided body 12, an injection molded product such as a polyolefin resin such as polypropylene or polyethylene, or an ABS resin can be used.

[0017] 2, the protrusion 22 has a communicating recess 24 formed to be recessed from the outer surface of the protrusion 22. The communicating recess 24 is recessed so as not to penetrate the protrusion 22 in a direction intersecting the protruding direction of the protrusion 22, and opens to the outside. The protrusion 22 has a plurality of communicating recesses 24 arranged at intervals in the length direction (air flow direction) along the outer edge of the first main body 18.

[0018] As shown in FIG. 3, the second divided body 14 includes a second main body 28 having a semicircular cross section cut in a direction intersecting the air flow direction, a second butt joint 30 extending outward from each of the two outer edges (the two side edges that are the ends of the semicircle) of the second main body 28, and a recess 32 provided in the second butt joint 30 into which the protrusion 22 of the first divided body 12 is inserted. The second main body 28 is formed in an eaves gutter shape with a semicircular groove extending in the air flow direction. The second butt joint 30 is formed in a brim shape along the outer edge of the second main body 28. The recess 32 is recessed in the direction away from the first butt joint 20 (the same direction as the protrusion direction of the protrusion 22) on the butt surface of the second butt joint 30 with the first butt joint 20. The recess 32 is disposed in the center of the extension direction of the second butt joint 30 and is formed in a groove shape extending along the outer edge of the second main body 28. The protrusion 22 inserted into the recess 32 is sandwiched between an outer side wall (hereinafter simply referred to as an outer wall) 33a of the recess 32 and an inner side wall (hereinafter simply referred to as an inner wall) 33b of the recess 32. The second divided body 14 can be an injection molded product made of, for example, a polyolefin resin such as polypropylene or polyethylene, or an ABS resin.

[0019] As shown in Fig. 3, the second butt portion 30 has a through hole 34 penetrating an outer wall 33a of the recess 32. The through hole 34 penetrates the outer wall 33a in the extending direction from the second main body 28 in the second butt portion 30, and communicates from the inside of the recess 32 to the outer surface of the second divided body 14. The through hole 34 and the communicating recess 24 are arranged opposite to each other, and the communicating recess 24 and the through hole 34 communicate in a direction intersecting with the protruding direction of the protrusion 22. The second butt portion 30 has a plurality of through holes 34 arranged at intervals in the length direction (air flow direction) along the outer edge of the second main body 28, and the through holes 34 and the communicating recess 24 are arranged correspondingly.

[0020] As shown in FIG. 4, the butted portions 20, 30 of the divided bodies 12, 14 have an adhesive resin portion 16 that spans the through hole 34 and the communicating recess 24. The adhesive resin portion 16 is also provided between the convex portion 22 and the recess 32 and between the opposing surfaces of the first butted portion 20 and the second butted portion 30. A clearance is provided between the convex portion 22 and the recess 32, and the gap between the outer wall 33a of the recess 32 and the convex portion 22 is set to be larger than the gap between the inner wall 33b of the recess 32 and the convex portion 22. Therefore, the thickness of the adhesive resin portion 16 between the outer wall 33a of the recess 32 and the convex portion 22 is larger than the thickness of the adhesive resin portion 16 between the inner wall 33b of the recess 32 and the convex portion 22.

[0021] Examples of the resin constituting the adhesive resin portion 16 include epoxy resins, silicone resins, vinyl acetate resins, polyurethane resins, phenolic resins, and rubbers such as chloroprene rubber and nitrile rubber. The adhesive forming the adhesive resin portion 16 may be any adhesive that hardens from a liquid state to a solid. Such adhesives may be in any form, such as a water-dispersed type, a solvent-based type, a solventless type, or a solid type, and may be of any hardening method, such as a solvent volatilization type, a moisture-hardening type, a heat-hardening type, a hardener mixed type, an anaerobic hardening type, an ultraviolet-hardening type, or a heat-melting type such as a hot melt.

[0022] As shown in FIG. 5A, when the first divided body 12 and the second divided body 14 are assembled, an adhesive is applied to the recess 32 of the second divided body 14. As shown in FIG. 5B, by inserting the convex portion 22 of the first divided body 12 into the recess 32 of the second divided body 14, the adhesive is pushed by the convex portion 22 and diffuses between the convex portion 22 and the recess 32. At this time, the adhesive enters the communicating recess 24 and the through hole 34 that are connected to each other. Then, the adhesive hardens to form an adhesive resin portion 16 across the communicating recess 24 and the through hole 34. In addition, the adhesive resin portion 16 is also formed between the convex portion 22 and the recess 32 and between the opposing surfaces of the first butting portion 20 and the second butting portion 30.

[0023] The assembly 10 includes an adhesive resin portion 16 formed of a hardened adhesive, straddling the communicating recess 24 of the protrusion 22 in the first divided body 12 and the through hole 34 penetrating the outer wall 33a of the recess 32 in the second divided body 14. Since the adhesive resin portion 16 extends in a direction intersecting the direction in which the protrusion 22 comes off the recess 32, the adhesive resin portion 16 straddling the communicating recess 24 and the through hole 34 can prevent the protrusion 22 from coming off. In this way, the assembly 10 can firmly connect the first divided body 12 and the second divided body 14, since the convex portion 22 and the recess 32 are prevented from coming off not only by the chemical action of bonding the opposing surfaces of the recess 32 and the protrusion 22 but also by the physical action of the adhesive resin portion 16 functioning like a wedge. Even with non-polar resins such as polypropylene, which are difficult to bond with adhesives, the connection strength can be ensured by the adhesive resin part 16, which functions like a wedge, so adhesives can be used to connect the first division 12 and the second division 14.

[0024] In the assembly 10, the range of the adhesive resin portion 16 can be easily adjusted, and by simply adjusting the range of the adhesive resin portion 16, an appropriate connection strength between the first divided body 12 and the second divided body 14 can be obtained. When the convex portion 22 is inserted into the concave portion 32, the liquid adhesive spreads between the convex portion 22 and the concave portion 32, so that the adhesive resin portion 16 formed between the first butt portion 20 and the second butt portion 30 can improve the sealing performance between the first butt portion 20 and the second butt portion 30. In addition, in the assembly 10, the adhesive resin portion 16 can be seen from the through hole 34 opening on the outer surface of the second divided body 14, so that it can be visually confirmed that the adhesive resin portion 16 has spread between the first butt portion 20 and the second butt portion 30. In addition, if it is visually confirmed that the adhesive resin portion 16 formed across the communication concave portion 24 and the through hole 34 is small, adhesive can be added from the through hole 34.

[0025] Compared to a configuration in which the butt portions are connected by claw engagement, the first butt portion 20 and the second butt portion 30 can be made compact, which allows the assembly 10 to be made smaller and improves the appearance of the assembly 10. Compared to a configuration in which the butt portions are connected by claw engagement, the assembly 10 allows the convex portion 22 to be easily inserted into the concave portion 32, which allows the equipment for connecting the first divided body 12 and the second divided body 14 to be simplified. Also, compared to a configuration in which the butt portions are connected by claw engagement, there are fewer restrictions on the positions of the communicating concave portion 24 and the through hole 34, which allows for greater freedom in designing the assembly 10.

[0026] Since the recess 32 forms a groove that follows the second butting portion 30 of the second divided body 14 and the protrusion 22 is a wall that fits into the groove-shaped recess 32, it is possible to ensure a wide range for forming the adhesive resin portion 16. This allows the first divided body 12 and the second divided body 14 to be firmly connected.

[0027] By making the gap between the outer wall 33a of the recess 32 and the protrusion 22 larger than the gap between the inner wall 33b of the recess 32 and the protrusion 22, when the protrusion 22 is inserted into the recess 32 to which adhesive has been applied, the adhesive can be guided to the through hole 34 and the communicating recess 24. This allows the adhesive resin portion 16 to be appropriately formed spanning the through hole 34 and the communicating recess 24, and the first divided body 12 and the second divided body 14 to be firmly connected.

[0028] In the assembly 10, the adhesive resin part 16 has an effect of preventing the projections 22 and the recesses 32 from coming apart, thereby improving the reliability of the connection between the first butt parts 20 and the second butt parts 30 by the adhesive. Since the connection between the first butt parts 20 and the second butt parts 30 by the adhesive is highly reliable, the assembly 10 of the present disclosure can be applied to ducts mounted on vehicles that vibrate when traveling.

[0029] (Example of change) The present invention is not limited to the above-mentioned items, and may be, for example, as follows: It should be noted that the present invention is not limited to the specific descriptions of the examples and the following modified examples. (1) In the embodiment, the communicating recess 24 does not penetrate the protruding portion 22, but this is not limited thereto, and the communicating recess 24 may penetrate the protruding portion 22 as shown in Fig. 6. In this way, by having the communicating recess 24 penetrate the protruding portion 22, the adhesive resin portion 16 spanning the through hole 34 and the communicating recess 24 can be made larger, and therefore the first divided body 12 and the second divided body 14 can be firmly connected to each other. (2) In the embodiment, the communication recesses 24 are provided at intervals in the direction along the outer edge of the first main body 18, but this is not limiting and may be formed as a groove along the first butting portion 20 of the first divided body 12, as shown in Fig. 7. In this manner, the communication recesses 24 and the through hole 34 can be more reliably connected to each other, and therefore the first divided body 12 and the second divided body 14 can be firmly connected to each other by the adhesive resin portion 16 spanning the through hole 34 and the communication recesses 24. (3) Although a duct has been given as an example of an assembled product, the assembled product is not limited to this and may be, for example, a tank-shaped product such as a resonator, or other product formed by combining multiple divided bodies. [Explanation of symbols]

[0030] 10 assembly, 12 first division body, 14 second division body, 16 adhesive resin part, 20 first butt portion, 22 convex portion, 24 communicating concave portion, 30 second butt portion, 32 recess, 34 through hole

Claims

1. An assembly in which the butt joints of the divided bodies are connected by adhesive, A protrusion is provided at an abutting portion of one of the divided bodies; a recess provided at the butted portion of the other divided body and into which the protrusion is inserted; a through hole penetrating a side wall of the recess; a communication recess provided at a portion of the protrusion facing the through hole and communicating with the through hole; an adhesive resin portion formed from the hardened adhesive and spanning the through hole and the communicating recess.

2. The assembly according to claim 1 , wherein the communicating recess penetrates the protruding portion.

3. The recess forms a groove along the butted portion of the other divided body, 3. The assembly according to claim 1, wherein the protrusion is a wall that fits into the groove.

4. The butt portion is provided on an outer edge of the assembly, The through hole is provided in an outer side wall of the recess, 3. The assembly according to claim 1, wherein a distance between an outer side wall of the recess and the protrusion is greater than a distance between an inner side wall of the recess and the protrusion.

5. 4. The assembly according to claim 3, wherein the communication recess is formed as a groove along the butted portion of one of the divided bodies.

6. 10. The assembly of claim 1 which is a duct mounted on a vehicle.

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