CN111727090B

CN111727090B - Insertion device for heat exchanger tubes

Info

Publication number: CN111727090B
Application number: CN201880089683.9A
Authority: CN
Inventors: 森下圭一
Original assignee: Hidaka Seiki KK
Current assignee: Hidaka Seiki KK
Priority date: 2018-04-05
Filing date: 2018-04-05
Publication date: 2022-03-22
Anticipated expiration: 2038-04-05
Also published as: JP6923981B2; KR102471912B1; WO2019193709A1; CN111727090A; JPWO2019193709A1; KR20200139661A

Abstract

The present invention addresses the problem of providing an insertion device for heat exchanger tubes in which stacked fins are arranged based on the positions of through holes in order to reliably insert the heat exchanger tubes into the through holes of the stacked fins. As a solution, an insertion device (100) of a heat exchanger tube is provided, characterized by having: a laminated fin holding unit (20) that holds the laminated fins (10) in a state in which the laminated state is maintained; a plurality of guide rods (30), wherein the plurality of guide rods (30) are inserted from the through hole (12) which is open on one end face of the laminated fin (10) in the laminating direction along the laminating direction of the laminated fin (10), and the top end part of the heat exchanger tube (T) inserted from the through hole (12) which is open on the other end face of the laminated fin (10) in the laminating direction is abutted; and a guide rod moving part (40) which enables the plurality of guide rods (30) to be inserted into the through holes (12) of the laminated fins (10) held by the laminated fin holding part (20), wherein the plurality of guide rods (30) are provided in a plurality of types according to the difference of the outer diameter size.

Description

Insertion device for heat exchanger tubes

Technical Field

The present invention relates to an insertion device for a heat exchanger tube, and more particularly, to an insertion device for a heat exchanger tube for inserting a heat exchanger tube into a position of a through hole formed in each fin with respect to a stacked fin used in a heat exchanger.

Background

As shown in fig. 24, a heat exchanger such as a refrigeration device is configured by inserting heat exchanger tubes T through which a heat medium flows into through holes 12 of laminated fins 10, and the laminated fins 10 are configured by laminating a plurality of fins 11 in which the through holes 12 are formed. As the heat exchanger tube T, a hairpin-shaped heat exchanger tube in which a copper tube is bent in a U-letter shape at a central portion thereof is used. As a heat exchanger tube insertion device for inserting the heat exchanger tube T into the through hole 12 of the laminated fin 10, there are known those disclosed in patent document 1 (international publication No. WO2017/061004) and patent document 2 (japanese patent laid-open No. 9-108760).

In order to insert the heat exchanger tubes into the through holes of the laminated fins, the positions of all the through holes formed in the fins must be aligned in the laminating direction of the laminated fins. Therefore, as disclosed in patent document 2, before inserting the heat exchanger tubes into the through holes of the laminated fins, the guide rods of the heat exchanger tubes are inserted through the through holes, and the respective fins constituting the laminated fins are arranged in the laminating direction based on the positions of the through holes.

Documents of the prior art

Patent document

Patent document 1: international publication No. WO2017/061004

Patent document 2: japanese laid-open patent publication No. 9-108760

Disclosure of Invention

Problems to be solved by the invention

In order to arrange the laminated fins, a guide rod having an outer diameter dimension substantially equal to the diameter dimension of the through hole may be inserted from the through hole in the lamination direction of the laminated fins. However, when such a guide rod is used, the guide rod may not be able to penetrate in the stacking direction of the stacked fins due to friction between the guide rod and the through hole. On the other hand, when the guide rod having an outer diameter smaller than the diameter of the through hole is used, the insertion of the guide rod into the laminated fins itself becomes easy, but the laminated fins cannot be aligned reliably, and there is a problem that it is difficult to insert the heat exchanger tube.

Means for solving the problems

The present invention has been made to solve the above problems. The purpose is to provide an insertion device for a heat exchanger tube, comprising: by arranging the heat exchanger tubes at the positions of the through holes formed in the respective fins of the stacked fins, the heat exchanger tubes can be reliably and easily inserted into the through holes.

That is, the present invention is a heat exchanger tube insertion device for inserting a heat exchanger tube into a position of a plurality of through holes formed in each of stacked fins used in a heat exchanger, the heat exchanger tube insertion device including: a laminated fin holding section that holds the laminated fins in a state in which a laminated state is maintained; a plurality of guide rods inserted from the through holes opened in one end surface of the laminated fins in the laminating direction along the laminating direction of the laminated fins, and abutting against distal ends of the heat exchanger tubes inserted from the through holes opened in the other end surface of the laminated fins in the laminating direction; and a guide rod moving portion that inserts the plurality of guide rods into the through holes of the laminated fins held by the laminated fin holding portion, wherein the plurality of guide rods are provided in a plurality of types according to the outer diameter dimension.

Accordingly, before the heat exchanger tube is inserted into the through hole formed in each of the laminated fins, the guide rod can be inserted through the laminated fins in the laminating direction at the position of the through hole, and the laminated fins can be reliably arranged in the laminating direction at the position of the through hole. Further, the heat exchanger tube can be easily and reliably inserted into the through-hole portion of the laminated fin only by pulling out the guide rod from the laminated fin in a state where the tip end portion of the heat exchanger tube is brought into contact with the tip end portion of the guide rod penetrating in the lamination direction of the laminated fin.

Further, it is preferable that the plurality of guide rods have: a 1 st guide rod formed to have an outer diameter size larger than that of the heat exchanger tube inserted into the through-holes and smaller than that of the through-holes; and a 2 nd guide bar formed such that the outer diameter dimension is in a size range of 98% to 102% with respect to the outer diameter dimension of the heat exchanger tube and is smaller than the 1 st guide bar.

Thus, an insertion device for a heat exchanger tube in which stacked fins can be reliably and efficiently arranged in the stacking direction of the stacked fins can be provided at low cost.

Preferably, the plurality of guide rods have a plurality of kinds of outer diameter sizes of caps at distal end portions on an insertion side into the through holes.

Accordingly, since only the outer diameter of the cap attached to the guide rod needs to be changed, the structure of the portion other than the cap can be made common.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the insertion device of a heat exchanger tube of the present invention, the stacked fins can be arranged in advance based on the positions of the through holes by passing the guide rods through the through holes formed in the respective fins of the stacked fins. Further, when the extraction operation of extracting the guide rod from the through hole of the laminated fin is performed in a state where the heat exchanger tube is brought into contact with the distal end portion of the guide rod, the heat exchanger tube can be easily and reliably inserted into the through hole of the laminated fin.

Drawings

Fig. 1 is a schematic configuration diagram of an insertion device for a heat exchanger tube according to embodiment 1.

Fig. 2 is a perspective view of the laminated fin of the present embodiment.

Fig. 3 is a main part sectional view showing a state where the 1 st guide rod is inserted into a through hole of a part of the laminated fin.

Fig. 4 is a main part sectional view showing a state where the 2 nd guide rod is inserted into another through hole of the laminated fin.

Fig. 5 is a main part sectional view showing an insertion state of a heat exchanger tube.

Fig. 6 is a main part sectional view showing an insertion procedure of the guide rod of embodiment 2 into the through hole of the laminated fin.

Fig. 7 is a main part sectional view showing an insertion procedure of the guide rod of embodiment 2 into the through hole of the laminated fin.

Fig. 8 is a main part sectional view showing an insertion procedure of the guide rod of embodiment 2 into the through hole of the laminated fin.

Fig. 9 is a schematic plan view of the guide rod moving section and the laminated fin conveying section according to embodiment 3.

Fig. 10 is a schematic front view corresponding to fig. 9.

Fig. 11 is a schematic front view showing an insertion process of the guide rod into the laminated fin according to embodiment 3.

Fig. 12 is a schematic front view next to fig. 11.

Fig. 13 is a schematic front view next to fig. 12.

Fig. 14 is a schematic front view next to fig. 13.

Fig. 15 is a schematic front view next to fig. 14.

Fig. 16 is a schematic front view next to fig. 15.

Fig. 17 is a schematic front view next to fig. 16.

Fig. 18 is a schematic plan view of the guide rod moving part and the heat exchanger tube insertion part of embodiment 3 and a view in the direction a in the figure.

Fig. 19 is a schematic front view corresponding to fig. 18.

Fig. 20 is a schematic front view showing an insertion process of the heat exchanger tube of embodiment 3 into the laminated fin.

Fig. 21 is a schematic front view next to fig. 20.

Fig. 22 is a schematic front view next to fig. 21.

Fig. 23 is a schematic front view next to fig. 22.

Fig. 24 is a perspective view of a laminated fin and a heat exchanger tube in the prior art.

Detailed Description

(embodiment 1)

Fig. 1 is a schematic configuration diagram of an insertion device for a heat exchanger tube according to the present embodiment. The insertion device 100 for a heat exchanger tube according to the present embodiment includes a stacked fin holding portion 20 for holding the stacked fin 10, a plurality of guide rods 30 inserted into the through holes 12 of the stacked fin 10, a guide rod moving portion 40 for moving the plurality of guide rods 30, and an operation control portion 50.

Fig. 2 is a perspective view of the stacked fin 10 and the heat exchanger tube T according to the present embodiment. The laminated fin 10 of the present embodiment is formed by laminating a plurality of plate-like fins 11 in the plate thickness direction. In the fin 11, a plurality of through holes 12 are formed in a staggered shape (a state in which the positions of the through holes 12 are staggered in adjacent columns or rows). In fig. 2, the direction of arrow X is a column direction, and the direction of arrow Y is a row direction. The hairpin-shaped heat exchanger tube T is a metal tube made of a material having high heat conductivity, such as a copper tube, and is bent in a U-shape at a bent portion B in the central portion in the longitudinal direction.

As shown in fig. 1, the laminated fin holding section 20 holds the laminated fins 10 while maintaining the laminated state of the laminated fins 10. As such a laminated fin holding portion 20, a clamp structure or the like can be used, the clamp structure including: a contact plate 22 that contacts the laminated fin 10, which is taken out from a stacking device (not shown) together with a stacking pin (not shown), from both ends of the laminated fin 10 in the stacking direction; and a contact plate driving unit 24 that moves the opposing

contact plates

22, 22 toward and away from each other in the stacking direction of the stacked fins 10 (the direction of arrow a in fig. 1). Although fig. 1 and 2 show the state in which the stacking pins are pulled out after the laminated fins 10 are sandwiched in the laminating direction by the abutment plates 22, the state in which the stacking pins are not pulled out from the laminated fins 10 may be set in advance. The operation of the contact plate driving unit 24 is controlled by the operation control unit 50.

The abutting plate 22 of the laminated fin holding portion 20 of the present embodiment is formed in an L-letter shape, the 1 st inner end edge 22A abuts a part of the formation surface of the through hole 12 of the laminated fin 10, and the 2 nd inner end edge 22B is spaced apart from the side surface of the laminated fin 10 by a predetermined interval. The contact plate 22 is advantageous in that the planar position of each fin 11 can be moved in a direction orthogonal to the stacking direction of the stacked fins 10 while maintaining the stacked state of the stacked fins 10. The structure of the laminated fin holding portion 20 is not limited to the structure shown in the present embodiment.

The plurality of guide rods 30 are inserted in the stacking direction of the stacked fins 10 from the through holes 12 that are open at one end surface of the stacked fins 10 held by the stacked fin holding portion 20 in the stacking direction. The plurality of guide rods 30 of the present embodiment have the 1 st guide rod 30A and the 2 nd guide rod 30B having the maximum outer diameter sizes different from each other. The 1 st guide rod 30A is formed to have a maximum outer diameter dimension larger than that of the heat exchanger tube T and smaller than that of the diameter dimension of the through holes 12. In contrast, the maximum outer diameter of the 2 nd guide rod 30B is formed to be substantially equal to the outer diameter of the heat exchanger tube T. The maximum outer diameter of the 2 nd guide rod 30B of the present embodiment is set to be within a range of 98% to 102% of the outer diameter of the heat exchanger tube T and smaller than the maximum outer diameter of the 1 st guide rod 30A.

As shown in fig. 3 and 4, the 1 st guide rod 30A can have a structure in which the rod portion 30Ar and the cap portion 30Ac are provided and the cap portion 30Ac is detachable from the tip of the rod portion 30Ar, and the 2 nd guide rod 30B can have a structure in which the rod portion 30Br and the cap portion 30Bc are provided and the cap portion 30Bc is detachable from the tip of the rod portion 30 Br. In this case, the maximum outer diameter of the cap 30Ac may be set to an outer diameter larger than the outer diameter of the heat exchanger tube T and smaller than the diameter of the through holes 12, and the maximum outer diameter of the cap 30Bc may be set to an outer diameter substantially equal to the outer diameter of the heat exchanger tube T. Accordingly, the rod portion 30Ar of the 1 st guide rod 30A and the rod portion 30Br of the 2 nd guide rod 30B can be made common so that the outer diameter dimension is equal to or smaller than the outer diameter dimension of the heat exchanger tube T. Further, it is advantageous in that the frictional resistance when the 1 st guide rod 30A is inserted into the through hole 12 can be reduced. As described above, it is important to provide a plurality of kinds of guide rods 30 different in maximum outer diameter size.

The guide rod moving section 40 is a structure for inserting and extracting the plurality of guide rods 30 from the outer position of the laminated fin 10 with respect to the laminated fin 10 in the laminating direction of the laminated fin 10 (inserting and extracting in the arrow B direction in fig. 1). As such a guide rod moving section 40, a linear motion device typified by a fluid cylinder or the like is suitably used. The guide rod moving section 40 of the present embodiment is controlled by the operation control section 50 to operate so that the 1 st guide rod 30A and the 2 nd guide rod 30B are inserted into and pulled out of the through hole 12 of the laminated fin 10 at different timings.

As shown in fig. 3, the operation control unit 50 of the present embodiment operates the guide rod moving unit 40 so that the 1 st guide rod 30A is inserted into a part of the plurality of through holes 12 that are open at one end surface of the laminated fin 10 held by the laminated fin holding unit 20 in the laminating direction. Next, as shown in fig. 4, the operation controller 50 operates the guide rod moving unit 40 so that the 2 nd guide rod 30B is inserted into the other remaining through holes 12. At this time, the 1 st guide rod 30A may be inserted into 1 through hole 12 with respect to the adjacent plurality of through holes 12, and in the present embodiment, the guide rod moving portion 40 is operated to insert 1 st guide rod 30A into each 4 through holes 12.

By inserting the 1 st guide rod 30A having an outer diameter slightly smaller than the diameter of the through hole 12 into a part of the through hole 12 in advance in this manner, all the 2 nd guide rods 30B can be reliably inserted from the through hole 12 in the stacking direction of the stacked fins 10. Thus, the laminated fins 10 can be reliably aligned in the lamination direction of the laminated fins 10 based on the positions of the through holes 12 without deformation of the through holes 12 by the 1 st guide rod 30A. Conversely, the 2 nd guide rod 30B having an outer diameter slightly smaller than the outer diameter of the 1 st guide rod 30A may be inserted into the through hole 12 prior to the 1 st guide rod 30A. This is advantageous in that the insertion process of the plurality of guide rods 30 into the through-hole 12 can be performed more smoothly.

In the present embodiment, the guide rods 30 are inserted into the through holes 12 in a state where the stacking pins are pulled out from the stacked fins 10, but as shown by the broken lines in fig. 3, a plurality of guide rods 30 may be inserted into the through holes 12 of the stacked fins 10 in a state where the stacking pins SP are inserted. Preferably, the 1 st guide rod 30A is inserted into the through hole 12 of the laminated fin 10 with respect to the through hole 12 into which the stacking pin SP is inserted. Specifically, the distal end portion of the 1 st guide rod 30A is abutted against the distal end portion of the stack pin SP, and the stack pin SP can be simultaneously extracted from the through hole 12 and the 1 st guide rod 30A can be simultaneously inserted into the through hole 12 while the abutting state of the 1 st guide rod 30A against the stack pin SP is maintained. By inserting the stacking pins SP through the through holes 12 of the stacked fins 10 in this manner, the 1 st guide rod 30A or the 2 nd guide rod 30B can be inserted into the stacked fins 10 while maintaining a certain degree of alignment, which is also advantageous in that.

In addition, when the stacking pins SP are inserted into the through holes 12 of the laminated fins 10, the state shown in fig. 4 can be set without passing through the state shown in fig. 3. Specifically, the tip of the 1 st guide rod 30A is brought into contact with the tip of the stack pin SP with respect to the through hole 12 into which the stack pin SP is inserted. Then, the tip of the 2 nd guide rod 30B is inserted into the other through hole 12. Then, the process of extracting the stack pin SP from the through hole 12, the process of inserting the 1 st guide rod 30A into the through hole 12, and the process of inserting the 2 nd guide rod 30B into the through hole 12 can be performed simultaneously.

The operation control unit 50 controls the operations of the laminated fin holding unit 20 and the guide rod moving unit 40, and may be constituted by a CPU of a personal computer, not shown, electrically connected to the insertion device 100 for heat exchanger tubes and a control program stored in a storage unit in advance. The operation control unit 50 of the heat exchanger tube insertion apparatus 100 can share the configuration of the operation control unit of the heat exchange core manufacturing apparatus, not shown.

After the positions of the respective fins 11 of the laminated fin 10 are aligned based on the positions of the through holes 12 in this way, the operation control section 50 performs an operation of inserting the heat exchanger tubes T into the through holes 12. Specifically, the heat exchanger tube T is passed through the through-holes 12 as follows.

The operation control unit 50 brings the tip of the heat exchanger tube T into contact with the cap 30Ac of the 1 st guide rod 30A and the cap 30Bc of the 2 nd guide rod 30B protruding from the through hole 12 opened in the other end face of the laminated fin 10 in the heat exchanger tube insertion unit (not shown) (see fig. 5). The operation controller 50 pulls out the 1 st guide rod 30A and the 2 nd guide rod 30B from the through holes 12 of the laminated fins 10 in the direction of the arrow in fig. 5 by the guide rod moving unit 40 while maintaining the state in which the tips of the heat exchanger tubes T are in contact with the caps 30Ac and 30 Bc. This allows the 1 st and 2

nd guide rods

30A and 30B to be simultaneously pulled out from the through holes 12 and inserted into the through holes 12 through the heat exchanger tubes T. In this way, a heat exchanger formed by inserting the heat exchanger tubes T into the laminated fin 10 can be manufactured.

(embodiment 2)

The present embodiment is characterized by having a 3 rd guide rod 30C in addition to the configuration of the plurality of guide rods 30 of the 1 st embodiment, and the 3 rd guide rod 30C is formed to have a maximum outer diameter size intermediate between the outer diameter size of the 1 st guide rod 30A and the outer diameter size of the 2 nd guide rod 30B. The 3 rd guide rod 30C is configured by a rod portion 30Cr and a cap portion 30Cc that is detachable from the rod portion 30Cr, as in the previous embodiment. Other configurations are common to embodiment 1, and therefore, the same reference numerals are used for illustration and the like, and detailed description thereof is omitted here.

As shown in fig. 6, the operation control portion 50 of the present embodiment inserts the 3 rd guide rod 30C into a part of the plurality of through holes 12 that are open at one end surface of the laminated fin 10 held by the laminated fin holding portion 20 in the laminating direction by the guide rod moving portion 40. Next, as shown in fig. 7, the operation control section 50 inserts the 1 st guide rod 30A into a part of the other through hole 12 (preferably, the through hole 12 through which the stack pin passes) by the guide rod moving section 40. Then, as shown in fig. 8, the operation control section 50 inserts the 2 nd guide rod 30B into the remaining through hole 12 by the guide rod moving section 40.

At this time, the operation control portion 50 may insert the 3 rd guide rod 30C, which is first inserted into the through hole 12, into 1 through hole 12 with respect to the adjacent plural through holes 12, and in the present embodiment, 13 rd guide rod 30C is inserted into every 4 through holes 12. Further, the operation control portion 50 of the present embodiment inserts the 1 st guide rod 30A into the through hole 12 located at the center of the 3 through holes 12 defined by the through hole 12 into which the 3 rd guide rod 30C is inserted. Then, the operation controller 50 inserts the 2 nd guide rod 30B into the remaining through hole 12.

In this way, the operation controller 50 inserts the 3 rd guide rod 30C having the maximum outer diameter thickness between the 1 st guide rod 30A and the 2 nd guide rod 30B into a part of the through hole 12 prior to the insertion of the 1 st guide rod 30A having the maximum outer diameter dimension. This enables smooth penetration of the 3 rd guide rod 30C into the through hole 12. Further, since the maximum outer diameter dimension of the 3 rd guide rod 30C is formed to be an appropriate size (the maximum outer diameter dimension between the outer diameter dimension of the 1 st guide rod 30A and the outer diameter dimension of the 2 nd guide rod 30B) with respect to the diameter dimension of the through hole 12, the stacked fins 10 can be aligned in advance, and the frictional force when the 1 st guide rod 30A is inserted into the through hole 12 can be reduced. This is advantageous in that the output of the guide rod moving portion 40 and the heat exchanger tube insertion portion can be reduced, and the deformation of the through-holes 12 can be minimized.

After the stacked fins 10 are arranged in the stacking direction, the heat exchanger tube T can be inserted into the through-holes 12 simply by pulling out the guide rod 30 from the through-holes 12 while maintaining the state in which the tip end portions of the heat exchanger tubes T are in contact with the guide rod 30 by the heat exchanger tube inserting portion and the guide rod moving portion 40, as in embodiment 1.

(embodiment 3)

In the present embodiment, a description will be given of an embodiment in which the stacked fin 10 in a state in which the stacking pin SP is inserted is conveyed to the stacked fin conveying unit 60 that moves closer to and away from the guide bar moving unit 40, and the plurality of guide bars 30 are inserted into the stacked fin 10 in a state in which the stacking pin SP is inserted. The plurality of guide rods 30 are formed in at least two outer diameter sizes, which is the same as the previous embodiment. In the present embodiment, for the sake of simplifying the description, the guide rods 30 are referred to as a plurality. As shown in fig. 9 and 10, the guide rod moving portion 40 of the present embodiment includes a base portion 41, a guide rod linear motion mechanism 42, a guide rod support body 44, a stacked fin receiving portion 46, and a stacked fin pressing portion 48. The operation of the guide rod moving unit 40 is controlled by the operation control unit 50. Since other configurations of the present embodiment are common to embodiment 1, the same reference numerals as those of embodiment 1 are used for illustration and the like, and detailed description thereof is omitted here.

The base portion 41 is formed as a plate body having a rectangular shape in plan view. A fluid cylinder 42 as a guide rod linear motion mechanism is disposed at an end of the base 41. A moving-side guide bar support 44A is attached to the output shaft of the fluid cylinder 42, and the moving-side guide bar support 44A moves in synchronization with the extending and contracting operation of the output shaft of the fluid cylinder 42. A fixed-side guide bar support 44B is provided upright on the base 41 at a position intermediate in the longitudinal direction. As described above, the guide bar support body 44 of the present embodiment is composed of the moving-side guide bar support body 44A and the fixed-side guide bar support body 44B. The 1 st end of the plurality of guide rods 30 is connected to the moving-side guide rod support 44A, and is supported by the fixed-side guide rod support 44B so as to be capable of reciprocating in a cantilever-supported state in which the axial direction of the plurality of guide rods 30 is horizontal (the axial direction of the plurality of guide rods 30 is horizontal and passes through the fixed-side guide rod support 44B).

The laminated fin receiving portion 46 is provided extending in the axial direction (reciprocating direction) of the plurality of guide bars 30. The laminated fin receiving portion 46 is formed as a long body, and is arranged at a plurality of positions with a desired interval in parallel with the axial direction of the plurality of guide rods 30. The positions of the through holes 12 of the laminated fins 10 placed on the laminated fin receiving portions 46 are aligned with the height positions of the plurality of guide rods 30.

A stacked fin pressing portion 48 is disposed at a position of the base portion 41 facing the guide rod linear motion mechanism 42 in a plan view. The laminated fin pressing portion 48 of the present embodiment includes a fin cylinder 48A and a stopper 48B attached to a distal end of a shaft of the fin cylinder 48A and capable of extending and contracting in the vertical direction in the drawing. The fin cylinder 48A extends and contracts in the same direction as the extending and contracting direction of the output shaft of the cylinder 42.

The laminated fin conveying section 60 includes stacking pin gripping sections 64 that grip the stacking pins SP that penetrate the laminated fins 10 at both ends of the base section 62 in the longitudinal direction. The base portion 62 is formed as a plate body having a rectangular shape in plan view. The stack pin gripping unit 64 is configured to be capable of switching between a gripping state and a non-gripping state of the stack pin SP and capable of moving closer to and away from the base 62 in the vertical direction. The laminated fin conveying section 60 is movable in at least the arrow X direction in fig. 10 and the arrow Z direction in fig. 11 by a drive mechanism, not shown, and is configured to be movable toward and away from the guide bar moving section 40. The operation of the laminated fin conveying section 60 is controlled by the operation control section 50.

Next, an insertion method of the plurality of guide rods 30 into the laminated fin 10 according to the present embodiment will be described. The laminated fin conveying unit 60 receives the laminated fins 10 in a state where the stacking pins SP are inserted from a stacking apparatus, not shown. Specifically, as shown in fig. 10, the stacking pin holding portion 64 holds the stacking pins SP protruding from both end portions of the stacked fins 10 in the stacking direction, and receives the stacked fins 10 together with the stacking pins SP from the stacking apparatus.

The laminated fin conveying section 60 moves in the direction of arrow X in fig. 10 under the instruction of the operation control section 50, and then moves in the direction of arrow Z in fig. 11 (or moves simultaneously), thereby placing the laminated fins 10 on the laminated fin receiving section 46. When the laminated fin 10 is placed on the laminated fin receiving portion 46, the stopper 48B extends (rises) in the direction of the arrow in fig. 11, and stands by at a side surface position of one end portion of the laminated fin 10 in the laminating direction. Next, the laminated fin conveying section 60 is moved in the arrow X direction of fig. 12 under the instruction of the operation control section 50, and is brought into a state in which the distal end portion of the stack pin SP is abutted against the distal end portions of the plurality of guide rods 30, and is brought into a state in which the plurality of guide rods 30 are aligned with the positions (insertion distal end portions) of the through holes 12. After the tip end portions of the stack pins SP are brought into contact with the tip end portions of the plurality of guide rods 30, as shown in fig. 13, the stack pin gripping portion 64 on the side where the plurality of guide rods 30 are located releases the gripping of the stack pins SP and is raised in the arrow direction so as to be away from the stack pins SP under the instruction of the operation control portion 50.

Next, the laminated fin pressing portion 48 contracts (shortens) the fin cylinder 48A in the direction of the arrow in fig. 14 (the side where the guide rod moving portion 40 is located) under the instruction of the operation control portion 50. As a result, as shown in fig. 14, the stacked fin 10 is moved by the stopper 48B so as to approach the side where the guide bar 30 is located. Next, the fluid cylinder 42 and the stacked fin conveying section 60 move the plurality of guide rods 30 and the stacking pins SP in a synchronized state in the direction of the arrow X shown in fig. 15 under the instruction of the operation control section 50. In this way, the insertion of the plurality of guide rods 30 into the through holes 12 of the laminated fins 10 and the extraction of the stack pins SP from the through holes 12 of the laminated fins 10 can be performed simultaneously.

After the stacking pin SP is completely pulled out from the laminated fin 10, as shown in fig. 16, the stacking pin gripping portion 64 retracted from the stacking pin SP moves (descends) in the arrow direction, approaches the stacking pin SP, and grips the stacking pin SP. Then, under the instruction of the operation control unit 50, the stacked fin conveying unit 60 is separated from the guide bar moving unit 40 (fig. 17).

According to the present embodiment, since the plurality of guide rods 30 are inserted through the through holes 12 in the laminated fin 10 in which the stacking pins SP are inserted through the through holes 12, the laminated fin 10 is aligned even before the plurality of guide rods 30 are inserted. This is advantageous in that the insertion process of the plurality of guide rods 30 into the through holes 12 of the laminated fins 10 can be smoothly performed, and the plurality of guide rods 30 can be simultaneously inserted into the through holes 12 of the laminated fins 10.

Fig. 18 is a plan view of the guide rod moving part 40 and the heat exchanger tube inserting part 70 of the present embodiment and a view in the direction a in the figure. Fig. 19 is a front view of fig. 18. The heat exchanger tube inserting portion 70 is used to insert the heat exchanger tube T into the through-hole 12 of the laminated fin 10 into which the plurality of guide rods 30 are inserted. The heat exchanger tube insertion portion 70 of the present embodiment has a base portion 72, a heat exchanger tube holding portion 74, and an insertion driving portion 76 for inserting the heat exchanger tube T into the through hole 12 of the laminated fin 10. The heat exchanger tube insertion portion 70 is provided so as to be movable toward and away from the guide bar moving portion 40. The operation of the heat exchanger tube inserting section 70 is controlled by the operation control section 50.

The base portion 72 is formed as a plate body having a rectangular shape in plan view. The heat exchanger tube holding portion 74 has a fixed-side holding portion 74A provided upright on the side where the guide rod moving portion 40 is located, and a moving-side holding portion 74B movable toward and away from the guide rod 30 in the axial direction. The fixed-side holding portion 74A is provided with a 1 st through hole 74Aa through which the heat exchanger tube T passes and a 2 nd through hole 74Ab through which the laminated fin receiving portion 46 passes. With the 1 st through hole 74Aa and the 2 nd through hole 74Ab, the heat exchanger tube T or the laminated fin receiving portion 46 does not interfere with the fixed-side holding portion 74A even if the heat exchanger tube insertion portion 70 is moved closer to or away from the guide rod moving portion 40. The moving-side holding portion 74B is provided so as to be movable along a guide body 78 provided upright on the upper surface of the base portion 72.

As shown in fig. 20, the heat exchanger tube insertion portion 70 is brought close to the guide rod movement portion 40 from the same height position as the guide rod movement portion 40 under the instruction of the operation control portion 50, and is brought into a state where the distal end portions of the heat exchanger tubes T are butted against the distal end portions of the plurality of guide rods 30. Then, the fluid cylinder 42 and the insertion driving portion 76 move the plurality of guide rods 30 and the heat exchanger tubes T in the direction of the arrow X in fig. 21 in a synchronized state while maintaining the state in which the plurality of guide rods 30 are in contact with the heat exchanger tubes T under the instruction of the operation control portion 50. In this way, the extraction process of the plurality of guide rods 30 from the through holes 12 and the insertion process of the heat exchanger tubes T into the through holes 12 can be performed simultaneously with respect to the laminated fin 10.

After the extraction process of the plurality of guide rods 30 with respect to the laminated fins 10 and the insertion process of the heat exchanger tubes T with respect to the laminated fins 10 are completed as shown in fig. 22, the heat exchanger tube insertion portion 70 is moved in a direction away from the guide rod moving portion 40 as shown in fig. 23 under the instruction of the operation control portion 50. In this way, the heat exchanger tube T can be inserted into the through hole 12 of the laminated fin 10. The laminated fin 10 with the heat exchanger tubes T inserted therein is taken out from the guide rod moving portion 40 by a robot or the like not shown.

While the present invention has been described above by taking various preferred embodiments, it is needless to say that the present invention is not limited to the embodiments, and various changes can be made without departing from the spirit of the present invention. For example, in embodiment 1, the following embodiment is described: the method is not limited to this, but 1 st guide rod 30A is inserted into each of 4 through holes 12, and then 2 nd guide rods 30B are inserted into the remaining through holes 12. The number of through holes 12 to be inserted into the 1 st guide rod 30A can be appropriately changed according to the outer diameter of the 1 st guide rod 30A.

In embodiment 1 and embodiment 2, the plurality of guide rods 30 are configured to have two kinds (1 st guide rod 30A and 2 nd guide rod 30B) or 3 kinds (1 st guide rod 30A, 2 nd guide rod 30B, and 3 rd guide rod 30C) of outer diameter dimensions, but the plurality of guide rods 30 may be configured to have 4 or more kinds of outer diameter dimensions.

In embodiments 1 and 2, the 1 st guide rod 30A, the 2 nd guide rod 30B, and the 3 rd guide rod 30C are configured such that the cap portions (30Ac, 30Bc, and 30Cc) are attachable to and detachable from the rod portions (30Ar, 30Br, and 30Cr), but the present invention is not limited to this configuration. The 1 st guide rod 30A, the 2 nd guide rod 30B, and the 3 rd guide rod 30C having the shapes described in the above embodiments may be formed in a so-called single piece. Further, the 1 st guide rod 30A, the 2 nd guide rod 30B, and the 3 rd guide rod 30C may be formed of simple cylindrical/cylindrical rod bodies having different maximum outer diameter dimensions.

Further, the heat exchanger tubes T may be inserted into the laminated fin 10 a plurality of times. This reduces friction between the through holes 12 and the heat exchanger tubes T, and therefore, the heat exchanger tubes T can be easily inserted into the through holes 12, and damage to the through holes 12 can also be prevented, which is advantageous in that.

In embodiment 3, the heat exchanger tube insertion portion 70 is moved from the same height position as the guide rod moving portion 40 toward and away from the guide rod moving portion 40, but the present invention is not limited to this embodiment. The heat exchanger tube insertion portion 70 can also move closer to and away from the guide bar moving portion 40 in the planar direction and the height direction (so-called three-dimensional direction) as in the stacked fin conveying portion 60.

The present invention can also be implemented by appropriately combining the above embodiments and the modifications in the description.

Claims

1. An insertion device for a heat exchanger tube, characterized in that the insertion device is used for inserting the heat exchanger tube into the position of a plurality of through holes formed in each fin for a laminated fin used in a heat exchanger,

the insertion device of the heat exchanger tube comprises:

a laminated fin holding section that holds the laminated fins in a state in which a laminated state is maintained;

a plurality of guide rods inserted from the through holes opened in one end surface of the laminated fins in the laminating direction along the laminating direction of the laminated fins, and abutting against distal ends of the heat exchanger tubes inserted from the through holes opened in the other end surface of the laminated fins in the laminating direction; and

a guide rod moving section that inserts the plurality of guide rods into the through holes of the laminated fins held by the laminated fin holding section,

the plurality of guide rods have at least:

a 1 st guide rod formed to have an outer diameter size larger than that of the heat exchanger tube inserted into the through-holes and smaller than that of the through-holes; and

a 2 nd guide rod formed such that the outer diameter dimension is smaller than that of the 1 st guide rod.

2. The heat exchanger tube insertion device according to claim 1,

the plurality of guide rods have:

a 1 st guide rod formed to have an outer diameter dimension larger than that of the heat exchanger tube inserted into the through-holes and smaller than that of the through-holes; and

a 2 nd guide bar formed such that the outer diameter dimension is in a size range of 98% to 102% with respect to the outer diameter dimension of the heat exchanger tube and is smaller than the 1 st guide bar.

3. The insertion device for a heat exchanger tube according to claim 1 or 2,

the plurality of guide rods are provided with a plurality of kinds of outer diameter sizes of caps at the top end parts of the insertion sides inserted into the through holes.