JP4967811B2 - Metal member joining structure and metal case having this structure - Google Patents

Description

  The present invention relates to a metal member joining structure suitable for joining a plurality of metal members, for example, in the case of manufacturing a metal case used for a purpose of accommodating a heat exchanger tube of a heat exchanger, and the structure. It is related with the metal case provided.

  The present applicant previously proposed a heat exchanger suitable for generating hot water by recovering heat from combustion gas, in which a plurality of heat transfer tubes are accommodated in a substantially rectangular metal case. (For example, see Patent Documents 1 to 3). The metal case is provided with a supply port and an exhaust port for combustion gas. When the combustion gas flows into the metal case from the supply port, heat is recovered from the combustion gas by each heat transfer tube. Hot water flowing in the heat pipe is heated.

  The above-described substantially rectangular parallelepiped metal case is manufactured by joining a plurality of metal plates, but it is required to prevent an unreasonable gap from being formed during the joining. If a gap is formed at the joint location, combustion gas may leak out of the metal case from this gap, and it is necessary to prevent this. In addition, when latent heat is recovered from the combustion gas, condensed water may be generated on the surface of the heat transfer tube, and this may flow down on the bottom of the metal case. It is also necessary to prevent it from flowing down. For this reason, in the past, when joining a plurality of metal plates, a means for bringing the end edges into contact with each other and performing TIG welding on the contact portion or between the metal plates is used. In fact, a means for fastening the metal plates with bolts or the like after the seal packing was sandwiched between them was used.

  However, if the means for welding the metal plates so as not to cause a gap as described above, or the means for fastening the metal plates using seal packing, bolts or the like is used, the operation is considerably complicated. . In particular, when other members are joined to a member having a corner portion formed in a U shape or an L shape, it is difficult to join them so as not to form a gap in the corner portion. In such a case, the joining operation becomes more complicated. As a result, conventionally, there has been a problem that the operation cost is high and the manufacturing cost of the metal case is also high.

JP 2007-17112 A JP 2007-3094 A JP 2007-10178 A

  The present invention has been conceived under the circumstances as described above, has good workability when joining metal members, can reduce the cost, and is unreasonable at the joint location. It is an object of the present invention to provide a metal member joining structure capable of suitably preventing a gap and a metal case provided with this structure.

  In order to solve the above problems, the present invention takes the following technical means.

  The metal member bonding structure provided by the first aspect of the present invention includes first and second members configured using a metal plate, and the first member includes a plurality of plate portions. Crossing each other and connecting via a corner portion, and having an open space portion surrounded by or sandwiched between the plurality of plate portions and the corner portion at an end portion in a predetermined direction. , A structure for joining the first and second members so that the whole or a part of the open space is closed by the second member, and an outer peripheral edge of the second member Further, standing piece portions that are located inward of the plurality of plate portions and the corner portion and are opposed to the inner surfaces thereof are formed, and the portions corresponding to the plurality of plate portions among the standing piece portions are The folded piece portion is continuously provided, and the folded piece portion is the plurality By being folded back so as to overlap the outer surface of the plate portion, the end portions of the plurality of plate portions are sandwiched between the folded piece portion and the upright piece portion, and the corner portion of the upright piece portion It is characterized in that a flange piece that is opposed to and contacted with the end face of the corner portion is continuously provided at a location corresponding to.

  According to such a configuration, the following effects can be obtained.

  That is, the plurality of plate portions of the first member are sandwiched between the folded piece portion and the standing piece portion of the second member, and no gaps can be formed in these portions. Further, the end surface of the corner portion of the first member is in contact with and opposed to the flange piece continuously provided on the upright piece portion of the second member, and is also covered with this flange piece. Can be prevented. Therefore, it is possible to prevent an unreasonable gap from being generated at the joint between the first and second members, and to ensure excellent airtight sealing performance or water sealing performance.

  The folded piece portion of the second member overlaps the outer surface of the plurality of plate portions of the first member, and the flange piece is in opposed contact with the end surface of the corner portion. Can be easily and appropriately subjected to a brazing process (of course, welding is also possible). Prior to the brazing process, the work of assembling and positioning the first and second members can be easily performed by fitting the second member into the open space at the end of the first member. it can. When the second member is inserted into the open space, the second member is prevented from being displaced in a predetermined direction by, for example, locking the folded piece to the end of the first member. You can also. As described above, according to the present invention, the assembling work for positioning the first and second members and the brazing work after the assembling work can be easily performed. Therefore, it is possible to suitably reduce the manufacturing cost.

  In a preferred embodiment of the present invention, both the folded piece portion and the flange piece are brazed to the first member.

  According to such a structure, since the brazed part becomes a sealing structure part, the airtight sealing performance or water-stop sealing performance of a joining part can further be improved. In addition, brazing is cheaper in work cost than, for example, TIG welding, and is more suitable for reducing manufacturing cost.

  In a preferred embodiment of the present invention, a slit is formed between the folded piece portion and the flange piece.

  According to such a configuration, when applying a force to the folded piece portion to perform the folding process, the force is prevented from reaching the flange piece, and the folded piece portion is appropriately disposed without damaging the flange piece. Can be folded.

  In a preferred embodiment of the present invention, the outer surface of the upright piece portion is in surface contact with the inner surface of the corner portion of the first member.

  According to such a configuration, sealing is also achieved between the inner surface of the corner portion of the first member and the outer surface of the upright piece portion, which is more suitable for improving the hermetic sealability of the joint portion.

  In preferable embodiment of this invention, the edge part area | region of the said predetermined direction is formed as a bending part with a larger curvature radius than the other part of the said corner part among the corner parts of the said 1st member. .

  According to such a structure, it becomes easy to make the outer surface of a standing piece part surface-contact appropriately with respect to the inner surface of the edge part area | region of a 1st member. Further, since it is not necessary to make a bent portion having a predetermined large radius of curvature for portions other than the end region of the corner portion, bending of those portions becomes easy.

  The metal case provided by the second aspect of the present invention is a metal case comprising first and second members configured using a metal plate, wherein the first and second members are provided. As the joining structure, the metal member joining structure provided by the first aspect of the present invention is used.

  According to such a structure, the same effect as described about the joining structure of the metal member provided by the 1st side surface of this invention is acquired.

  Other features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

  1 to 4 show an example of a heat exchanger having a metal case to which the present invention is applied. The heat exchanger HE of the present embodiment has a configuration in which a plurality of heat transfer tubes P are accommodated in a substantially rectangular parallelepiped metal case C. As shown in FIG. 4, the plurality of heat transfer tubes P are formed in a spiral tube body portion 5 in which a plurality of loop portions 50 having a substantially oval shape in a plan view are arranged in a vertical direction with an appropriate gap therebetween. have. The sizes of the respective loop portions 50 of the plurality of heat transfer tubes P are different, and these are arranged in a substantially concentric lap winding shape. Extending pipe parts 51 and 52 drawn out of the metal case C are integrally or separately provided below and above the plurality of spiral pipe parts 5. A water inlet header 6A having 60A and a hot water header 6B having a hot water outlet 60B are attached.

  In this heat exchanger HE, combustion gas generated by a combustor (not shown) is supplied from an air supply port 19a of the rear plate portion 12 of the metal case C as shown in FIGS. 3 and 4 (a). When supplied into the metal case C, the combustion gas passes through the gaps between the plurality of loop portions 50. During this passage, heat is recovered from the combustion gas by the plurality of loop portions 50, and then the combustion gas is discharged from the exhaust port 19 b of the front plate portion 11 to the outside of the metal case C. In the heat exchanger HE, when hot water is supplied to the incoming header 6A, the hot water flows through the plurality of heat transfer pipes P and is heated by the combustion gas. Thereafter, the heated hot water reaches the hot water header 6B and is supplied from the hot water header 6B to a desired location via an appropriate pipe (not shown).

  Next, a specific configuration of the metal case C will be described.

  5 and 6, the metal case C includes a main body member 1, a pair of side plate members 2A and 2B, and a top plate member 3, all of which are compared. It is formed by pressing a thin metal plate such as stainless steel. When the metal case C is manufactured, a procedure of first joining the pair of side plate members 2A and 2B to the main body member 1 and then joining the top plate member 3 is adopted. Hereinafter, a specific joining structure of the members will be described.

  As shown well in FIG. 6, the main body member 1 is formed by bending a single metal plate into a substantially U-shaped cross-section with an open upper surface, and a flat bottom plate portion 10 extending in a certain direction. The front plate portion 11 and the rear plate portion 12 are erected from both front and rear side edges, and these are integrally connected via a corner portion 13. The longitudinal direction both ends of the main body member 1 are surrounded by a bottom plate portion 10, a front plate portion 11, and a rear plate portion 12 (hereinafter, collectively referred to as “plate portions 10 to 12”). An open space portion 14 is formed. The side plate members 2 </ b> A and 2 </ b> B are members for closing the open space portion 14, and have a flat plate-like main body portion 20 corresponding to the open space portion 14 and having a substantially rectangular shape in a side view. The side plate members 2A and 2B are the same in other configurations except that a plurality of through holes 29 for inserting the heat transfer tubes P are formed in one side plate member 2B.

  7 to 13 show a joint structure between the main body member 1 and the side plate member 2A. In this joining structure, the main body member 1 corresponds to an example of the first member referred to in the present invention, and the side plate member 2A corresponds to an example of the second member referred to in the present invention. As shown well in FIG. 11, in the outer peripheral edge of the main body portion 20 of the side plate member 2 </ b> A, the lower edge, the front edge, and the rear edge excluding the upper edge have a total length direction of the side plate member 2 </ b> A. Standing piece portions 21 erected in the (longitudinal direction of the main body member 1) are formed in series. Two corner portions 21 a are formed on the standing piece portion 21. A folded piece 22 that is folded outward is continuously provided at the tip of the standing piece 21. However, the folded piece portion 22 is provided to avoid the corner portion 21a of the standing piece portion 21, and is divided into three portions 22a to 22c. A flange piece 23 bent at a substantially right angle with respect to the standing direction of the standing piece 21 is connected to each tip of the corner portion 21a. The flange piece 23 has, for example, an arc shape as well shown in FIG. A slit 24 is formed between the flange piece 23 and the folded piece portion 22.

  As shown in FIG. 11, the curvature radius R1 of the inner surface of the longitudinal end portion Sa of the corner portion 13 of the main body member 1 is larger than the curvature radius R2 of the inner surface of the other region Sb. The curvature radius R2 is set to a minimum radius (substantially zero or a value close to zero) when a metal plate as a raw material of the main body member 1 is bent at a substantially right angle, for example. On the other hand, the end portion Sa of the corner portion 13 is intentionally rounded, and the curvature radius R1 is, for example, about 2 mm to several mm or more. On the other hand, as for the side plate member 2A, as shown in FIG. 12, the outer surface 21a 'of the corner portion 21a of the upright piece portion 21 is rounded with a curvature radius R3. The curvature radius R3 is aligned with the curvature radius R1.

  In the joining structure of the main body member 1 and the side plate member 2A shown in FIG. 7, the main body portion 20 and the upright piece portion 21 of the side plate member 2A are fitted into the open space portion 14, and the outer surface of the upright piece portion 21 is the main body member. 1 is in contact with the inner surface of the plate portions 10-12. The flange piece 23 is in contact with the end surface 13 a of the corner portion 13 of the main body member 1. Further, as shown in FIG. 10, for example, the folded piece portion 22 is folded so as to overlap the outer surfaces of the plate portions 10 to 12, and the folded piece portion 22 and the standing piece portion 21 Therefore, each part of the end part in the longitudinal direction of the main body member 1 is sandwiched. In addition, the folding | returning piece part 22 is not made so large in the folding | turning angle before the assembly | attachment to the main body member 1. FIG. As shown in FIG. 13, the folded piece portion 22 is further folded in the direction indicated by the arrow N1 after the side plate member 2A is fitted into the open space portion. Since the slit 24 is formed between the flange piece 23 and the folded piece portion 22, when the folded piece portion 22 is folded, the force is not applied to the flange piece 23, The folded piece portion 22 can be easily and accurately folded while protecting the peripheral portion.

  As shown in FIG. 9 and FIG. 10, there is a brazing material between n 1 between the front end of the flange piece 23 and the outer surface of the main body member 1 and n 2 between the front end of the folded piece 22 and the outer surface of the main body member 1. (Not shown) is coated and these parts are brazed. Preferably, the peripheral portion of the slit 24 and the main body member 1 are also brazed. The heat treatment for brazing is performed simultaneously with the heat treatment for brazing the top plate member 3 described later.

  Next, the operation of the joint structure between the main body member 1 and the side plate member 2A will be described.

  The open space 14 at the end in the longitudinal direction of the main body member 1 is closed by the side plate member 2 </ b> A. The standing piece portion 21 and the folded piece portion 22 of the side plate member 2 </ b> A are composed of the three plate portions 10 of the main body member 1. Among the end portions in the longitudinal direction of ˜12, portions other than the corner portion 13 are sandwiched. On the other hand, the end surface 13a of the corner portion 13 is covered with the flange piece 23 of the side plate member 2A. As a result, it is possible to prevent a gap from being generated at a joint portion between the longitudinal ends of the three plate portions 10 to 12 of the main body member 1 and the outer peripheral edge of the side plate member 2A. Therefore, when combustion gas is introduced into the metal case C and condensed water is generated in the metal case C due to latent heat recovery, the combustion gas and condensed water are joined to the main body member 1 and the side plate member 2A. It is possible to prevent leakage from the location to the outside.

  As described with reference to FIGS. 11 and 12, the curvature radius R1 of the inner surface of the end portion Sa of the corner portion 13 of the main body member 1 is the same as the curvature radius R3 of the outer surface of the corner portion 21a of the upright piece portion 21. Since they are aligned, these portions can be brought into surface contact so as not to generate a gap. Thereby, the sealing performance of the joint location of the corner part 13 of the main body member 1 and 2 A of side plate members can be improved more. As for the corner portion 13, only the inner surface of the end portion Sa is precisely defined to a predetermined curvature radius R1, but the curvature radius R2 of the other portion Sb is particularly precisely defined to a predetermined value. There is no need. Therefore, unlike the present embodiment, the main body member 1 can be easily manufactured as compared with the case where the radius of curvature is precisely defined to a predetermined value over the entire length of the corner portion 13.

  Moreover, since the joining part of the main body member 1 and the side plate member 2A is brazed, in addition to ensuring the joining of the main body member 1 and the side plate member 2A, the water stop at the joining portion Sealability and airtightness are further improved. Compared with welding such as TIG welding, the brazing process is easy. In addition, when performing either brazing or welding, it is necessary to position the main body member 1 and the side plate member 2A in combination prior to that, but in this embodiment, the open space 14 of the main body member 1 is used. By inserting the side plate members 2A into the two, they can be simply and appropriately positioned. At the time of fitting, the base portion of the folded piece portion 22 is locked to the end surface of the main body member 1, and the flange piece 23 is brought into contact with the end surface 13 a of the corner portion 13, thereby accurately positioning the main body member 1 in the longitudinal direction. It is possible to do. In this way, a series of manufacturing operations can be facilitated, and the manufacturing cost can be reduced. The joint structure between the main body member 1 and the side plate member 2B is the same as the above-described joint structure between the main body member 1 and the side plate member 2A, and the description thereof is omitted, but the same advantages as described above are obtained ( In addition, in drawing, the same code | symbol is attached | subjected to the location corresponding to the side plate member 2A about the side plate member 2B.

  FIGS. 14 and 15 show the joining structure of the top plate member 3 to the main body member 1 and the side plate member 2A. In this joining structure, the main body member 1 and the side plate member 2A correspond to a specific example of the first member in the present invention, and the top plate member 3 corresponds to a specific example of the second member in the present invention. As shown well in FIG. 15, the front plate portion 11 and the rear plate portion 12 of the main body member 1 and the main body portion 20 of the side plate member 2 </ b> A intersect and are connected at the corner portion 40. The main body member 1 and the side plate member 2A are assembled as an upper surface opening case in which an open space portion 14A is formed on the upper surface portion.

  The top plate member 3 is for closing the open space portion 14A, and has a flat plate-like main body portion 30 having a rectangular shape in plan view corresponding to the open space portion 14A. On the entire circumference of the outer peripheral edge of the main body portion 30, standing piece portions 31 erected upward are connected in series. A folded piece portion 32 folded downward is continuously provided at the tip end portion (upper end portion) of the standing piece portion 31. However, the folded piece portion 32 is provided to avoid the corner portion 31a of the standing piece portion 31, and is divided into a plurality of portions. A flange piece 33 bent at a substantially right angle is continuously provided at each upper end portion of the corner portion 31a. A slit 34 is formed between the flange piece 33 and the folded piece portion 32.

  As shown in FIG. 14, in this joining structure, the main body portion 30 and the upright piece portion 31 of the top plate member 3 are fitted into the open space portion 14A, and the outer surface of the upright piece portion 31 is the front plate portion 11 and the rear plate portion. The plate portion 12 and the inner surface of the main body portion 20 of the side plate member 2A are in contact with each other. The flange piece 33 is in contact with the upper end surface 40 a of the corner portion 40. The folded piece portion 32 is folded so as to overlap the outer surfaces of the front plate portion 11, the rear plate portion 12, and the main body portion 20 of the side plate member 2 </ b> A, and the folded piece portion 32 and the standing piece portion 31. The above-described parts are sandwiched. As with the folding piece portion 22 of the side plate member 2A described above, the folding angle of the folding piece portion 32 is not so large before the top plate member 3 is fitted into the open space portion 14A. Instead, it is folded back largely after being inserted into the open space 14A. The slit 34 plays a role for accurately performing such folding of the folded piece portion 32, and this point is also the same as the slit 24 described above. Although not shown in the drawing, the folded piece 32 and the tip of the flange piece 32 are brazed to the outer surfaces of the main body member 1 and the side plate member 2A.

  In the joint structure described above, the top plate member 3 closes the open space portion 14A surrounded by the main body member 1 and the side plate member 2A, but the standing piece portion 31 and the folded piece portion 32 of the top plate member 3 are Of the upper portion of the front plate portion 11, the rear plate portion 12 of the main body member 1, and the main body portion 20 of the side plate member 2 </ b> A, portions other than the corner portion 40 are sandwiched. Further, the upper end surface 40 a of the corner portion 40 is covered with the flange piece 33. For this reason, it is possible to prevent a gap from being generated at the joint between the outer peripheral edge of the top plate member 3 and the upper portions of the main body member 1 and the side plate member 2A. Accordingly, it is possible to appropriately prevent the combustion gas introduced into the metal case C from being leaked to the outside from the joint. In addition, since the joint portion is brazed, the brazed portion further improves the hermetic sealability of the joint portion, and also increases the joint strength and increases the assembly strength of the metal case C. . Prior to brazing, in order to position the top plate member 3 at a predetermined position with respect to the main body member 1 or the side plate member 2A, the top plate member 3 may be inserted into the open space portion 14A. The folded piece portion 32 and the flange piece 33 can be locked or brought into contact with the upper surface portions of the main body member 1 and the side plate member 2A so as to be positioned so as not to fall downward. Therefore, positioning of each member to be performed prior to brazing can be performed easily and accurately, which is suitable for reducing the manufacturing cost. Thus, also in this joining structure, the same advantage as having described the joining structure of the main body member 1 and the side plate member 2A is obtained. In addition, about the joining structure of the top plate member 3 with respect to the side plate member 2B side, it is the same as that of the top plate member 3 with respect to the side plate member 2A side, The description is abbreviate | omitted.

  The present invention is not limited to the contents of the above-described embodiment. Various changes can be made in the design of the metal member joining structure and the specific configuration of each part of the metal case according to the present invention.

  The first member referred to in the present invention is not limited to one in which a plurality of plate portions are connected in a U shape. For example, as shown in FIG. 16, the first member 1 </ b> A has an L shape having two plate portions 10 and 11, and the open space portion 14 </ b> B at the longitudinal end portion of the first member 1 is formed. The present invention can also be applied to the case where these members are joined so as to be closed by the second member 2C (in FIG. 16, the same or similar elements as those of the previous embodiment are denoted by the same reference numerals). ) Even if it is such a structure, these can be joined appropriately, improving the sealing performance of the joining location of 1st and 2nd member 1A, 2C. Moreover, the 1st member said by this invention should just have the form which the some board part cross | intersected and connected via the corner part, and the some board part does not need to be integral with each other. . This is because, in the structure in which the top plate member 3 is joined to the main body member 1 and the side plate member 2A described with reference to FIGS. 14 and 15, the main body member 1 and the side plate member 2A are the first members in the present invention. It will be understood from the fact that it corresponds to a specific example.

  Although the 2nd member said by this invention is joined so that the open space part currently formed in the edge part of the 1st member may be plugged up, it is not necessarily required to block the whole open space part, It is possible to only partially block a part. The standing piece portion and the folded piece portion provided on the second member are preferably provided over substantially the entire length region of the joining target region (for the folded piece portion, the substantially full length region of the region excluding the corner portion). It is not limited to. For example, in the case where a ventilation gap is formed in a part of the first and second joints, it is possible not to provide the standing piece part or the folded piece part in the part. . About the flange piece, what is necessary is just to be provided so that the end surface of the corner part of a 1st member may face, and the specific shape, size, etc. do not ask | require.

  The metal member joining structure according to the present invention is suitable for brazing the first and second members, but such a brazing may be omitted. Moreover, it can also be set as the structure which gave fillet welding etc. instead of brazing.

  The metal case according to the present invention is suitable for being configured as a case for a heat exchanger, but is not limited to this case, and may be configured as a case used for other purposes. The shape of the case is not limited to a substantially rectangular parallelepiped shape.

It is a front view which shows an example of the heat exchanger using the metal case to which this invention was applied. It is a left view of the heat exchanger shown in FIG. FIG. 3 is a sectional view taken along line III-III in FIG. 1. (A) is a top sectional view of the heat exchanger shown in Drawing 1, and (b) is a front sectional view of the heat exchanger shown in Drawing 1. It is a disassembled perspective view of the metal case shown in FIG. It is a disassembled perspective view of the metal case shown in FIG. It is a principal part perspective view of the junction structure part of the metal case shown in FIG. It is a principal part side view of the arrow VIII of FIG. It is IX-IX sectional drawing of FIG. It is XX sectional drawing of FIG. It is a principal part disassembled perspective view of the junction structure part shown in FIG. It is a principal part side view of the arrow XII of FIG. It is a principal part perspective view which shows the state before the folding | returning piece part is largely folded in the junction structure part shown in FIG. It is a principal part perspective view of the junction structure part of the metal case shown in FIG. It is a principal part disassembled perspective view of the junction structure part shown in FIG. It is a schematic perspective view which shows the other example of this invention.

Explanation of symbols

C Metal case 1 Body member 2A, 2B Side plate member 3 Top plate member 10 Bottom plate part (plate part)
11 Front plate (plate)
12 Rear plate (plate)
13 Corner part 13a End face (of the corner part)
14, 14A Open space portion 21 Standing piece portion 22 Folding piece portion 23 Flange piece 24 Slit 31 Standing piece portion 32 Folding piece portion 33 Flange piece 34 Slit 40 Corner portion 40a Upper end surface (end surface of corner portion)

Claims (6)

Comprising first and second members configured using a metal plate;
The first member has an opening in which a plurality of plate portions intersect with each other and are connected via a corner portion, and an end portion in a predetermined direction is surrounded or sandwiched by the plurality of plate portions and the corner portion. It has a configuration in which a space is formed,
A structure for joining the first and second members so that the whole or a part of the open space is closed by the second member;
On the outer peripheral edge of the second member, standing piece portions that are located inward of the plurality of plate portions and the corner portion and are opposed to the inner surfaces thereof are formed,
Of the standing piece portions, the folded piece portions are continuously provided at locations corresponding to the plurality of plate portions, and the folded piece portions are folded so as to overlap the outer surfaces of the plurality of plate portions. The end portions of the plurality of plate portions are sandwiched between the folded piece portion and the standing piece portion,
The metal member joining structure, wherein a flange piece that is opposed to and contacted with an end surface of the corner portion is connected to a portion corresponding to the corner portion of the standing piece portion.   The metal member joining structure according to claim 1, wherein the folded piece portion and the flange piece are both brazed to the first member.   The metal member joining structure according to claim 1, wherein a slit is formed between the folded piece portion and the flange piece.   The metal member joining structure according to any one of claims 1 to 3, wherein an outer surface of the upright piece portion is in surface contact with an inner surface of a corner portion of the first member.   5. The metal member according to claim 4, wherein, in the corner portion of the first member, the end region in the predetermined direction is formed as a bent portion having a larger radius of curvature than the other portion of the corner portion. Joining structure. A metal case comprising first and second members configured using a metal plate,
A metal case, wherein the metal member bonding structure according to claim 1 is used as the first and second member bonding structure.

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