JP6234321B2 - Heat exchanger manufacturing equipment - Google Patents

Description

  The present invention relates to an apparatus for manufacturing a fin-and-tube heat exchanger in which fins are attached to a flat tube one by one by, for example, rotational movement.

  As a conventional fin-and-tube heat exchanger manufacturing device using flat tubes, a mechanism that holds the fins in a state where the flat tube is fitted between the restraining pins and the position is regulated, and a groove that evades the flat tube There is one in which fins are mounted on a flat tube one by one by a mounting drum that performs a rotational motion including a plurality of fin mounting plates that are held (see, for example, Patent Document 1).

JP2013-59847A (pages 11-14, FIGS. 1-11)

  In the prior art as described above, the fins can be securely attached to the tube one by one in a predetermined position, and a heat exchanger free from fin deformation or pitch disturbance can be manufactured at a desired pitch without using a spacer jig. Although it is effective, it can be inserted only between restraining pins that restrain in the minor axis direction (parallel direction) when positioning a plurality of flat tubes, and is not restrained in the vertical direction of the flat tubes. There was a problem that it was difficult to install.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a heat exchanger manufacturing apparatus that realizes highly reliable fin mounting on a tube having a flat cross section.

  An apparatus for manufacturing a heat exchanger according to the present invention includes a tube holding member having a seating surface portion and a positioning restraint portion which are formed in a flat cross section and in which a plurality of tubes through which fluid flows are arranged in parallel at a predetermined interval in the short diameter direction. And a fin mounting configured to sequentially repeat the operation of holding the fin formed with the plurality of tube mounting grooves in a predetermined posture and mounting the fin on the outer peripheral surface of the plurality of tubes held by the tube holding member. A fin-and-tube heat exchanger manufacturing apparatus comprising: a mechanism portion; and a plurality of the fins mounted at predetermined intervals along a longitudinal direction of the plurality of tubes arranged in a minor axis direction, A tube pressing member that is disposed so as to press the plurality of tubes held by the surface portion from the side opposite to the seating surface portion and restrains the plurality of tubes in a direction orthogonal to the minor axis direction. It is obtained by way provided.

  According to this invention, the plurality of tubes are disposed on the side opposite to the seat surface portion with respect to the plurality of tubes positioned at predetermined intervals in the minor axis direction on the seat surface portion of the tube having a flat cross section, and the plurality of tubes are arranged in the direction of the seat surface portion. By providing the tube pressing member for pressing the tube, the vertical and horizontal positions of the plurality of tubes can be restrained, so that the positioning accuracy of the fin mounting position can be increased.

It is a perspective view which shows notionally the principal part of the heat exchanger using the flat tube manufactured with the manufacturing apparatus of the heat exchanger to which this invention is applied. It is a top view which shows notionally the fin in the heat exchanger shown by FIG. It is a side view which shows notionally the principal part of the manufacturing apparatus of the heat exchanger to which this invention is applied. It is a perspective view which illustrates notionally the example of the restraint part of the tube holding member which hold | maintains the several tube in the juxtaposition direction at predetermined intervals in the manufacturing apparatus of the heat exchanger to which this invention is applied. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows notionally the principal part of the manufacturing apparatus of the heat exchanger by Embodiment 1 of this invention, (a) is the front view (left side) and right side view (right side) in a normal state, (b) is It is the front view (left side) and right side view (right side) in an abnormal state. It is the front view (left side) and right view (right side) which show notionally the principal part of the manufacturing apparatus of the heat exchanger by Embodiment 2 of this invention. It is a figure which shows notionally the principal part of the manufacturing apparatus of the heat exchanger by Embodiment 3 of this invention, (a) is the front view (left side) and right side view (right side) in a normal state, (b) is It is the front view (left side) and right side view (right side) in an abnormal state.

  FIG. 1 is a perspective view conceptually showing a main part of a heat exchanger using a flat tube manufactured by a heat exchanger manufacturing apparatus to which the present invention is applied. In FIG. 1, a heat exchanger 100 is a fin-and-tube heat exchanger and includes a tube 1 and a fin 2. The tube 1 is mounted in a tube mounting groove 21 provided in the fin 2 and joined to each other. Has been. The fins 2 have a flat plate shape and are stacked in parallel at regular intervals. A plurality of tubes 1 that are formed in a flat shape with an oval cross section are arranged in parallel in the minor axis direction, and fluid such as water or refrigerant flows through each of the tubes 1.

  FIG. 2 is a plan view conceptually showing the fins 2 in the heat exchanger shown in FIG. As shown in FIG. 2, a plurality of substantially U-shaped tube mounting grooves 21 are regularly formed at predetermined intervals on the fin 2, and a surface formed between adjacent tube mounting grooves 21, 21 is formed on the fin 2. Are formed with slits 22 and 23, respectively. And on the same surface side of the fin 2, a fin collar (not shown) for bringing the tube 1 and the fin 2 into close contact with each other along the edge of each tube mounting groove 21 rises vertically. Is formed. The slits 22 and 23 and the fin collar are formed so as to protrude in the same direction with respect to the surface of the fin 2.

  On the other hand, as described above, the fluid such as the refrigerant flows through the tube 1, but by making the cross section flat, the flow rate of the fluid such as the refrigerant can be increased without increasing the flow resistance. Thus, even when the size is reduced, sufficient performance as a heat exchanger can be obtained. The fins 2 are disposed across the plurality of tubes 1 juxtaposed in the minor axis direction, and are mounted on the outer peripheral surfaces of the plurality of tubes 1 by individually mounting the tubes 1 in the respective tube mounting grooves 21. The As shown in FIG. 1, a plurality of fins 2 formed in the same shape are attached to the outer peripheral surfaces of a plurality of tubes 1 with a predetermined interval. In the heat exchanger 100 configured as described above, the fluid flowing in each tube 1 evaporates, for example, so that the heat is evaporated from the surrounding atmosphere via the tube 1 and the plurality of fins 2. Is cooled.

  FIG. 3 is a side view conceptually showing a main part of a heat exchanger manufacturing apparatus to which the present invention is applied, and FIG. 4 is a diagram showing a plurality of tubes in the juxtaposition direction in the heat exchanger manufacturing apparatus to which the present invention is applied. It is a perspective view explaining notionally the example of the restraint part of the tube holding member hold | maintained at a space | interval. In the figure, the manufacturing apparatus 200 of the heat exchanger 100 is a restraint portion that positions the seat surface portion 301a of the base plate 301 on which the plurality of tubes 1 are juxtaposed at predetermined intervals in the juxtaposition direction of the tubes 1 as shown in FIG. Holding the plurality of restraining pins 302 or the tube holding member 300 having a restraining function of the tube 1 instead of the restraining pins 302 and the fins 2 formed with the plurality of tube mounting grooves 21 shown in FIG. 2 in a predetermined posture, The fin mounting mechanism 210 configured to sequentially repeat the operation of mounting on the outer peripheral surface of each tube 1 held by the tube holding member 300, and the mounting position of the fin 2 on the tube 1 is fixed in the longitudinal direction of the tube 1. A moving means (not shown) for relatively moving the tube 1 and the fin mounting mechanism section 210 is provided for changing the pitch. In addition, the supply apparatus of the fin 2 with respect to the fin mounting mechanism part 210, the control apparatus which controls operation | movement of the whole apparatus, etc. are abbreviate | omitting illustration.

  As shown in FIG. 3, the fin mounting mechanism section 210 includes a drum 212 that rotates around the axis X in the direction of arrow A, that is, in the clockwise direction in FIG. Are provided with a plurality of (eight in FIG. 3) fin holding portions 211 and cam followers 213 that connect the fin holding portions 211. Each fin holding portion 211 performs a circular motion around the axis X as the drum 212 rotates, but when it reaches the uppermost portion in the vertical direction, it receives one fin 2 and receives the fin holding surface 211a. The fins 2 that are held are attached to the outer peripheral surface of the tube 1 when the lowest part in the vertical direction in the figure is reached. The holding of the fin 2 by the fin holding portion 211 is performed by, for example, vacuum suction that sucks the fin 2 using air suction.

  The tube 1 is held such that the major axis direction of the cross section is the vertical direction in the figure, and is moved in the direction of arrow B at a predetermined speed. The movement of the tube 1 is performed by a moving means (not shown) that relatively moves the fin 2 and the tube 1 to be attached to the tube 1 in the length direction of the tube 1. The tube 1 may be fixed and the drum 212 may be moved in the direction opposite to the arrow B.

  As described above, the drum 212 rotates at a predetermined speed in the direction of the arrow A, and the eight fin holding portions 211 are sequentially rotated every (1/8) rotation of the drum 212, that is, at predetermined time intervals. 3 reaches the lowest position of the drum 212 shown in FIG. 3, and the fin 2 is attached to the outer peripheral surface of the tube 1 during the stop period. The attachment of the fins 2 to the tube 1 by this operation corresponds to the fin attachment step of attaching the fins 2 to the tube 1 one by one. The tube 1 to which the fin 2 is attached moves at a predetermined speed in the direction of the arrow B by a distance corresponding to the fin pitch, stops again, and the next fin 2 is attached. Accordingly, the fin pitch, which is the distance between the fins 2 that are sequentially mounted on the outer peripheral surface of the tube 1 by the fin holding portion 211, is always kept constant. In the heat exchanger manufacturing apparatus to which the present invention is applied, the fin pitch is arbitrarily set by changing the moving speed of the tube 1 in the B direction, changing the rotational speed of the drum 212, or both. Can do.

  As shown in FIG. 4, the tube holding member 300 includes a plurality of restraining pins 302 and a base plate 301 provided with holes (not shown) for fixing these restraining pins 302 at an equal pitch. Has been. The plurality of restraining pins 302 are fixed by being partially attached to holes provided in a row on one side and the other side of the seating surface portion 301 a on the surface of the base plate 301. Two restraining pins 302 adjacent to each other on one side and the other side of the seating surface portion 301 a of the base plate 301 regulate the position in the juxtaposition direction of the seating surface portion 301 a of the base plate 301 of the tube 1. Thereby, the plurality of chives 1 are arranged at an equal pitch in the width direction of the tube 1.

  The distance between the opposed outer peripheral surfaces of the constraining pins 302, 302 located on both sides of the tube 1 is set slightly wider than the width of the tube 1 (the outer dimension on the short diameter side). The tube holding member 300 is easily attached / detached and moved. FIG. 4 shows a case where the restraint pins 302 are arranged in two rows and the restraint pins located on both sides of the plurality of tubes 1 are set to be in the same row. Alternatively, the constraining pins located on both sides of the plurality of tubes 1 may be arranged in a zigzag shape, for example, without forming the same row. In addition, the same configuration as in Patent Document 1 can be used.

Embodiment 1 FIG.
FIG. 5 is a diagram conceptually showing a main part of the heat exchanger manufacturing apparatus according to Embodiment 1 of the present invention, in which (a) is a front view (left side) and a right side view (right side) in a normal state. b) A front view (left side) and a right side view (right side) in an abnormal state. As shown in FIG. 5, the tube holding member 300 in the first embodiment uses a plurality of restraining pins 302 shown in FIG. 4 as a restraining portion that restrains the plurality of tubes 1 in a juxtaposed direction at a predetermined interval. A plurality of grooves 303 for accommodating and holding the majority of the lower portion of the tube 1 are formed in the base plate 301A at a predetermined interval, and the tubes 1 are constrained in the juxtaposition direction using the side wall portions 303a of the grooves 303. As shown in FIG. 5, the upper edge portion 304 of the base plate 301 </ b> A is inclined so that the tip end side in the mounting direction of the fin 1 is lowered in order to prevent interference with the operation range of the fin holding portion 211. Further, the seat surface portion 301 a is configured by the bottom surface of the groove 303. In addition, the thing similar to what is shown to FIGS. 1-3 from the tube 1, the fin 2, and the fin mounting mechanism part 210 which mounts the fin 2 on the tube 1 can be used preferably.

  Above the tube holding member 300 in the drawing, the tube holding member 4 is formed so as to press the tube 1 held in the groove 303 from the side opposite to the seating surface portion 301a, and restrains the tube 1 in the vertical direction in the drawing. A plurality of tube pressing claws 41 are provided. Each tube presser claw 41 is provided with an actuator (not shown) such as an air cylinder or a motor, for example, and as shown in the left side view of FIG. The seat portion is moved corresponding to the plurality of tubes 1 held by the tube holding member 300 by moving the portion so as to advance and retreat in the direction indicated by the arrow C, or by moving in the direction indicated by the arrow D. The distal end portion on the lower left side is configured to press the upper end portion of the tube 1 separately in the direction of 301a.

  The tube pressing claw 41 is moved to a position that regulates the vertical direction of the tube 1 even in an abnormal state where the tube 1 is not in the groove 303 and is not restrained. In a state where the tube 1 enters the groove 303 and the lower surface thereof is in contact with the seat surface portion 301a, the lower end portion of the tube pressing claw 41 may be in contact with the upper surface of the tube 1, or the minute gap They may be separated by Further, the position of the shaft when the tube pressing claw 41 is rotated in the arrow D direction is not particularly limited. A shaft 51 is erected on the side surface of each tube presser claw 41 in parallel with the juxtaposition direction of the tubes 1, and a restraint abnormality detector 52 is rotatably supported on the shaft 51. It is configured to be able to rotate in the direction of the arrow D, independent of 41.

  In this example, the restraint abnormality detector 52 is formed in a substantially “<”-shaped rod shape, and one end portion of the upper right portion in the left side view of FIG. On the inner corner side of the letter shape, there is provided an action piece 52a protruding so as to act on the sensor 53 fixed to the side face portion of the tube presser claw 41, and the other end portion 52b on the lower left side of the figure is a regular one. It forms so that it may interfere with the upper surface of the tube 1 which has remove | deviated from this restraint position. The sensor 53 can be appropriately selected and used, for example, a sensor that is turned on / off by light incident and light shielding, a non-contact type sensor that uses magnetism, or a sensor that is turned on / off by contact.

  The shaft 51, the constraint abnormality detector 52, and the sensor 53 constitute a constraint abnormality detection means 5. The restraint abnormality detector 52 is prevented from rotating in the counterclockwise direction in the left side view of FIG. 5A by interfering with a sensor 53 or a restriction pin (not shown) provided on the tube pressing claw 41 or the like. When the tube presser claw 41 moves in the direction of arrow C or arrow D, it moves together with the tube presser claw 41. When all of the tubes 1 are normally held by the tube holding member 300, the tube pressing claw 41 moves to a position where the upper surface of the tube 1 is pressed as shown in FIG. The other end portion 52 b moves with the tube pressing claw 41 to the vicinity of the tube 1, and the position of the action piece 52 a with respect to the sensor 53 does not change.

  On the other hand, when any one of the plurality of tubes 1 is not normally held by the tube holding member 300 and is out of the normal restraint position, the other end of the restraint abnormality detector 52 as shown in FIG. 52b interferes with the upper surface of the tube and stops moving downward in the figure, while the tube presser claw 41 moves to the upper part of the tube holding member 300 as in the normal case. On the other hand, the restraint abnormality detector 52 relatively rotates in the clockwise direction, and the action piece 52a moves away from the sensor 53, whereby the sensor 53 is activated and a signal is output. The thickness of the restraint abnormality detector 52 (the width in the juxtaposition direction of the tubes 1) is slightly smaller than the interval between the adjacent tube pressing claws 41.

  Further, as shown in the right side view (right side) of FIGS. 5A and 5B, the restraint abnormality detector 52 is placed on both sides of the tube 1 at the end of both ends of the plurality of tubes 1 arranged side by side. Are also arranged so as to be able to detect the tube 1 that is not constrained in the vicinity of the left and right sides of the tube 1 at the end. Specifically, as shown in the right side view of FIG. 5 (b), when the tube 1 is in an abnormal state where it is not restrained by the groove 303, the tube presser claw 41 regulates the vertical direction of the tube 1. When it moves to the position, the restraint abnormality detector 52 at the left end in the figure interferes with the tube 1 in the abnormal state and cannot move downward in the figure, but rotates relatively clockwise around the shaft 51. The sensor 53 is activated by the action piece 52 a being separated from the sensor 53.

  Since the restraint abnormality detector 52 and the sensor 53 are installed in each tube presser claw 41, it is detected in which tube 1 an abnormal state in which the tube 1 is not restrained by the restraint pin 302 is generated. Can do. The restraint abnormality detector 52 may be configured not to move in the arrow D direction by the tube 1, and may be configured to move in the arrow C direction by a linear motion guide, for example. Further, the installation position of the shaft 51 is not limited to that described above. The base plate 301A may be the base plate 301 shown in FIG.

  According to the first embodiment configured as described above, the seat surface portion 301a is defined with respect to the plurality of tubes 1 positioned at predetermined intervals in the juxtaposed direction (the minor axis direction) on the seat surface portion 301a of the base plate 301A. A tube pressing claw 41 that constitutes a tube pressing member 4 that is disposed on the opposite side and presses the plurality of tubes 1 in the direction of the seating surface portion 301a; and a constraint abnormality detecting means 5 that detects abnormality in the constraint state of the plurality of tubes 1; Since the upper, lower, left and right positions of the plurality of tubes 1 can be constrained, the positioning accuracy of the fins 2 can be improved and the fins 2 can be accurately mounted at predetermined positions, and the deformation of the tubes 1 can be performed by the restraint abnormality detecting means 5. If an abnormal positioning condition is detected, for example, an alarm is issued to notify the restraint abnormality, and at the same time the operation of the fin mounting mechanism 210 is stopped. Measures such as controlling so that it becomes possible, and the tube 1, can prevent damage to the fin attachment mechanism 210 can be manufactured with high reliability heat exchanger. Also, the yield is improved.

  The tube pressing member 4 uses a plurality of tube pressing claws 41 provided so as to individually advance and retreat in the direction of the seat surface portion 301a corresponding to the plurality of tubes 1 held by the tube holding member 300, respectively. One end of the restraint abnormality detector 52 is pivotally supported by a shaft 51 erected on the side surface of the tube pressing claw 41, and the other end thereof is in a forward / backward direction with respect to the lateral portions of the plurality of tubes 1. Since it is installed so as to move and is formed so as to interfere with the tube 1 when the tube 1 is out of the normal restraint position, the position of the restraint abnormality detector 52 is detected by the sensor 53, so that the restraint mechanism It is possible to detect an abnormal state where the tube 1 is not contained in the tube together with the position of the tube 1 where the abnormality has occurred, so that the recovery from the abnormality can be appropriately handled. That.

Embodiment 2. FIG.
FIG. 6 is a front view (left side) and a right side view (right side) conceptually showing the main part of the heat exchanger manufacturing apparatus according to Embodiment 2 of the present invention. In the first embodiment shown in FIG. 5, the tube pressing claws 41 that regulate the vertical positions of the plurality of tubes 1 juxtaposed are provided so as to be able to advance and retreat individually. However, in the second embodiment, the tube pressing claws 41 The base portion on the actuator side (upper side in FIG. 6) is integrally integrated, and a plurality of tube pressing claws 41 are formed in a comb-like shape and are formed of a single rigid body that moves integrally in the direction of the seat surface portion 301a. A comb-like tube pressing member 4A is used. In the second embodiment, the restraint abnormality detecting means 5 for detecting an abnormal state in which the tube 1 is not restrained inside the groove 303 is configured in the same manner as in the first embodiment described above. Since the claw 41 is integrated, the shaft 51 can be shared. The configurations of the tube holding member 300 and the fin mounting mechanism 210 are the same as those in the first embodiment.

  According to the second embodiment configured as described above, the tube presser claw 41 is formed in a comb-like shape and operates as a whole, and therefore, there is one actuator for driving the tube presser claw 41. In other words, it is possible to obtain a further effect that space saving and cost reduction can be achieved as compared with the first embodiment. It should be noted that the detection of the abnormality in restraint of the tube 1 by the restraint abnormality detecting means 5 is performed in the same manner as in the embodiment, and the same effect can be obtained.

Embodiment 3 FIG.
FIG. 7 is a diagram conceptually showing a main part of a heat exchanger manufacturing apparatus according to Embodiment 3 of the present invention, in which (a) is a front view (left side) and a right side view (right side) in a normal state. b) A front view (left side) and a right side view (right side) in an abnormal state. FIG. 7B shows an example of an abnormal state where the tube 1 is not normally restrained by the tube holding member 300 and one tube 1 rides on the adjacent groove 303 and the upper edge 304 between the grooves 303. Is shown. In the third embodiment, a plurality of constraint abnormality detectors 52A constituting the constraint abnormality detection means 5 are integrated into one rigid body. Other configurations are the same as those of the second embodiment.

  In the third embodiment configured as described above, if the tube 1 that is abnormally constrained with respect to the tube holding member 300 is present at any one of the upper edge portions 304 of the tube holding member 300, the tube is integrated with the tube. The restraint abnormality detector 52A interferes and rotates clockwise in the drawing with respect to the tube presser claw 41 (that is, the tube presser member 4A), and the action piece 52a provided on the restraint abnormality detector 52A causes the sensor 53 to move. Operate. Therefore, only one sensor 53 is required to detect the displacement of the restraint abnormality detector 52A, and it is not necessary to detect which tube has the abnormal state in which the tube 1 is not restrained by the restraining pin 302. In this case, the cost can be reduced.

  It should be noted that within the scope of the present invention, a part or all of each embodiment can be freely combined, or each embodiment can be appropriately modified or omitted.

  100 heat exchanger, 1 tube, 2 fin, 21 tube mounting groove, 22 slit, 23 slit, 200 heat exchanger manufacturing apparatus, 210 fin mounting mechanism, 211 fin holding section, 211a fin holding surface, 212 drum, 213 Cam follower, 300 Tube holding member, 301 Base plate, 301A Base plate, 301a Seat surface portion, 302 Restraint pin, 303 Groove, 303a Side wall portion, 304 Upper edge portion, 4 Tube presser member, 4A Tube presser member, 41 Tube presser claw, 5 Constraint abnormality detection means, 51 axis, 52 Constraint abnormality detector, 52A Constraint abnormality detector, 52a Acting piece, 52b The other end, 53 sensors.

Claims (7)

  A tube holding member having a seating surface portion and a positioning restraint portion for juxtaposing a plurality of tubes which are formed in a flat cross section and allow fluid to flow inside at a predetermined interval in the minor axis direction, and a fin in which a plurality of tube mounting grooves are formed And a fin mounting mechanism configured to sequentially repeat the mounting operation on the outer peripheral surfaces of the plurality of tubes held by the tube holding member, and arranged in the minor axis direction. An apparatus for manufacturing a fin-and-tube heat exchanger in which a plurality of fins are mounted at predetermined intervals along a longitudinal direction of the plurality of tubes, wherein the plurality of tubes held on the seating surface portion are the seats. A heat exchanger comprising a tube pressing member that is disposed so as to be pressed from the side opposite to the surface portion and restrains the plurality of tubes in a direction orthogonal to the minor axis direction. Forming apparatus.   The apparatus for manufacturing a heat exchanger according to claim 1, further comprising a restraint abnormality detecting unit configured to detect an abnormality in a restraint state of the plurality of tubes.   The tube pressing member is formed by using a plurality of tube pressing claws provided so as to individually advance and retreat in the direction of the seating surface portion corresponding to the plurality of tubes held by the tube holding member, respectively. The apparatus for manufacturing a heat exchanger according to claim 1 or 2.   In the tube pressing member, a plurality of tube pressing claws formed corresponding to the plurality of tubes held by the tube holding member are integrally formed in a comb-like shape, and are integrally formed in the direction of the seat surface portion. The apparatus for manufacturing a heat exchanger according to claim 1 or 2, wherein the apparatus is provided so as to advance and retreat. A restraint abnormality detecting means for detecting a restraint abnormality of the plurality of tubes is provided, and the restraint abnormality detecting means is disposed on the opposite side to the seat surface portion with respect to the plurality of tubes and is held by the seat surface portion. A plurality of restraint abnormality detectors formed so as to move in the advancing and retreating direction with respect to the side portions of the plurality of tubes formed and interfere with the tube when the tube is out of the regular restraint position; and The apparatus for manufacturing a heat exchanger according to any one of claims 2 to 4, wherein a sensor that outputs a detection signal based on the position of the restraint abnormality detector is used. A restraint abnormality detecting means for detecting a restraint abnormality of the plurality of tubes is provided, and the restraint abnormality detecting means is disposed on the opposite side to the seat surface portion with respect to the plurality of tubes and is held by the seat surface portion. A plurality of restraint abnormality detectors formed so as to move in the advancing and retreating direction with respect to the side portions of the plurality of tubes formed and interfere with the tube when the tube is out of the regular restraint position; and And a sensor that outputs a detection signal based on the position of the restraint abnormality detector. The plurality of restraint abnormality detectors are pivotally supported so that one end portion thereof can be rotated on the side surface portion of the tube presser claw. 5. The heat exchanger according to claim 3, wherein the other end portion is installed so as to move together with the tube pressing claws in a forward and backward direction with respect to the side portions of the plurality of tubes. Manufacturing Location. A restraint abnormality detecting means for detecting a restraint abnormality of the plurality of tubes is provided, and the restraint abnormality detecting means is disposed on the opposite side to the seat surface portion with respect to the plurality of tubes and is held by the seat surface portion. A plurality of restraint abnormality detectors formed so as to move in the advancing and retreating direction with respect to the side portions of the plurality of tubes formed and interfere with the tube when the tube is out of the regular restraint position; and A sensor that outputs a detection signal based on the position of the restraint abnormality detector, and the plurality of restraint abnormality detectors are integrally formed in a comb-like shape, and one end on the base side is It is pivotally supported by the side part of the tube presser claw and is installed so that the other end part, which is the tooth side, moves together with the tube presser claw in the advancing and retracting direction with respect to the side parts of the plurality of tubes. The feature Heat exchanger manufacturing apparatus in claim 4 wherein.

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