JP4526573B2 - Tension applying device and heat exchanger fin manufacturing device - Google Patents

Description

  The present invention relates to a tension applying device and a heat exchanger fin manufacturing device, and more specifically, a feeding device that intermittently feeds the metal strip into a press device for drilling through holes with collars in the metal strip, A tension applying device comprising a gripping device for applying a predetermined tension to the metal strip when the feeding of the metal strip to the press device by the feeding device is stopped, and the tension applying device The manufacturing apparatus of the fin for heat exchangers which comprises this.

A heat exchanger fin used in a heat exchanger such as a cooler is manufactured by a heat exchanger fin manufacturing apparatus shown in FIG. A metal strip 10 made of a metal such as aluminum, which is a workpiece of the heat exchanger fin, is drawn out from the coil 12. The drawn metal strip 10 is inserted into the oil applying device 16, processing oil is attached to the surface thereof, and supplied to the mold device 20 provided in the press device 18.
The metal strip 10 that has passed through the mold apparatus 20 is formed with a plurality of collared through holes in which a collar having a predetermined height is formed around the perforated hole at predetermined intervals in a predetermined direction. ing.
The metal strip 10 is transferred by a predetermined distance in a predetermined direction, then cut to a predetermined length by the cutting blade 26, and then accommodated in the stacker device 28.

The press device 18 shown in FIG. 6 includes a metal strip 10 in which a plurality of collared through holes are formed at predetermined intervals in a predetermined direction as described in Patent Document 1 below. A hitch feeder 29 is provided as a transfer device for intermittent transfer in the direction of 26.
The hitch feeder 29 uses the driving means shown in FIG. The driving means includes a connecting rod 32 connected to an eccentric pin of a crank 30 that rotates synchronously with the press device 18, a first link 36 that swings about a pin 34, and a lever 40 that rotates about a fulcrum shaft 38. The second link 42 connected to the pin 44 is connected to the pin 44 at the lower end of the connecting rod 32. The first link 36 is provided with a cylinder device 37 that adjusts the swing angle thereof. According to the driving means shown in FIG. 7, the connecting rod 32 reciprocally rotates the lever 40 via the first link 36 and the second link 42 by the rotation of the crank 30.

As shown in FIG. 8, a link 46 is connected to the upper end of the lever 40, and the reciprocating body 50 can reciprocate along the guide 48.
As shown in FIG. 9A, the reciprocating body 50 has a feed pin 52 having a tip end surface formed in an inclined surface, and a slit 54 of a reference plate provided with the tip end portion above the reciprocating body 50. It is biased by a spring 56 so as to pass through and protrude from the upper surface of the reference plate.
The tip of the feed pin 52 protruding from the upper surface of the reference plate is inserted into the collared through hole 11 of the metal strip 10 placed on the placement surface of the reference plate, as shown in FIG. The For this reason, the metal strip 10 can also be moved in the direction of arrow A by moving the reciprocating body 50 in the direction of arrow A shown in FIG.
On the other hand, as shown in FIG. 9B, when the reciprocating body 50 moves in the direction of arrow B, which is the opposite direction to the direction of arrow A, the inclined surface of the front end surface of the feed pin 52 has a collar. The feed pin 52 is slidably brought into contact with the peripheral edge of the through hole 11 and moves in the direction of arrow B. A force against the urging force of the spring 56 acts on the feed pin 52, and the feed pin 52 is gradually pushed into the reciprocating body 50. For this reason, when the reciprocating body 50 moves in the arrow B direction, the feeding of the metal strip 10 can be stopped, and the metal strip 10 can be intermittently sent in the arrow A direction.
JP 2006-21876 A

According to the metal strip feeder shown in FIG. 9, the reciprocating body 50 can move in synchronization with the press device 18, and the feed speed of the metal strip 10 can be easily changed according to the increase or decrease of the rotational speed of the press device 18. it can.
However, when the rotation speed of the press device 18 is increased, in the metal strip feeder shown in FIG. 9, when the reciprocating body 50 stops moving in the feed direction of the metal strip 10, the metal strip 10 is fed. Excessive feeding may occur in the feeding direction beyond the tip formed on the inclined surface of the pin 52.
In this way, when excessive feeding occurs in the metal strip 10, press processing is performed at a location different from the planned location, which causes frequent occurrence of defective products.
Therefore, the present invention has a problem of the conventional heat exchanger fin manufacturing apparatus in which excessive feeding of the metal strip may occur when the movement of the reciprocating body of the feeding device of the metal strip is stopped. To provide a tension applying device and a heat exchanger fin manufacturing device that can apply a predetermined tension to the metal strip when the movement of the reciprocating body of the metal strip is stopped in the feeding direction. For the purpose.

In order to solve the above problems, the present inventors provide a gripping means for gripping the metal strip 10 in the mold device 20 of the press device 18, and when the reciprocating body 50 stops, the metal strip 10 is predetermined. I tried to give the tension.
However, in order to apply a predetermined tension to the metal strip 10 when the reciprocating body 50 stops, it is necessary for the reciprocating body 50 to grip the metal strip 10 before the complete stop point. On the other hand, when the metal strip 10 is gripped before the reciprocating body 50 is completely stopped, in the mold apparatus 20 synchronized with the rotation speed of the press device 18, the timing for releasing the grip of the metal strip 10 is the time of the reciprocating body 50. Delayed from the start of movement in the feed direction. For this reason, an unreasonable force may act on the collared through hole of the metal strip 10 in which the feed pin 52 is inserted, and the collared through hole may be deformed. Therefore, it has been found that skill is required to adjust the holding time and the release time of the metal strip 10.
In addition, since the excess feed amount of the metal strip 10 differs depending on the rotation speed of the press device 18, when the rotation speed of the press device 18 is changed, the adjusted holding time and release timing of the metal strip 10 are re-established. It has also been found that adjustment is required.

For this reason, the present inventors can easily adjust the holding time and the release time of the metal strip to apply a predetermined tension to the metal strip even if the rotation speed of the press device is changed. Further investigations were made.
As a result, when the feeding device stops feeding the metal strip to the press device, a gripping device that grips the metal strip and applies a predetermined tension is provided separately from the press device, and the metal strip is attached to the press device. It has been found that it is effective to adjust the gripping time for gripping and the time for releasing gripping according to the number of rotations of the press device, and the present invention has been achieved.
That is, the present invention relates to a press device that drills a through hole with a collar in a metal strip, a feed device that intermittently feeds the metal strip, and the feed device stops feeding the metal strip to the press device A tension applying device having a gripping device for applying a predetermined tension to the metal strip, and a base on which the metal strip travels on the upper surface. A reciprocating body that reciprocates in the longitudinal direction of the metal strip, and a feed pin whose tip is urged in the direction of the metal strip by an urging member provided in the reciprocating body. When moving in the feed direction of the metal strip, the tip of the feed pin inserted into the collared hole formed in the metal strip stops the feed of the metal strip and the reciprocating body Is a metal strip When moving in the opposite direction with respect to the vertical direction, the tip of the pin slidingly contacts the inner peripheral edge of the collared through hole is inclined so that it can escape from the collared through hole against the biasing force of the biasing member The gripping device is in contact with the metal strip so that a predetermined tension is applied to the metal strip when the reciprocating body of the feed device stops moving in the feed direction. And when the reciprocating body starts to move in the feeding direction of the metal strip, the grip member for releasing the grip , the grip member is held in contact with the metal strip, and the grip is released. A cam member, a servo motor that drives the cam member in synchronization with the rotation of the press device, a biasing member that biases the gripping member toward the upper surface of the base, and a standing member that is erected on the gripping member , Can rotate around the shaft And a reciprocating member that reciprocates in synchronization with the rotation of the press device, and the servo motor is used for gripping the metal strip. With this, the cam member pushes down the wheel-shaped member, the gripping member connected to the wheel-shaped member descends by the biasing force of the biasing member, and grips the metal strip between the gripping member and the surface of the base. When the metal strip is released, the cam member pushes up the wheel member by the servo motor, and the grip member connected to the wheel member rises against the biasing force of the bias member, In the tension applying device, the gripping state of the metal strip held between the member and the surface of the base is released .
Further, the present invention provides a press apparatus for manufacturing a heat exchanger fin by forming a plurality of collared through holes in a metal strip and cutting the metal strip into a predetermined length, and stacking the heat exchanger fins An apparatus for manufacturing a fin for a heat exchanger comprising a suction device that is dispensed to the apparatus, wherein the above-described tension applying device is used.

According to the tension applying device according to the present invention, when the feeding of the metal strip by the feeding device to the press device is stopped, the gripping device that grips the metal strip and applies a predetermined tension is separated from the press device. By providing in, it is possible to easily adjust the holding time and the release time of the metal strip to an optimum value according to the rotation speed of the press device.
As a result, it is possible to prevent the collar-shaped through-hole from being deformed due to the release time for releasing the gripping of the metal strip being delayed from the start time of movement of the feeding device in the feeding direction of the reciprocating body.
Further, even when the number of rotations of the press device is changed, the gripping time and the release time of the metal strip can be easily adjusted, and it is possible to easily cope with changes in the processing speed of the press work.

  An example of a heat exchanger fin manufacturing apparatus according to the present invention is shown in FIG. In the heat exchanger fin manufacturing apparatus shown in FIG. 1, the tension of the metal strip 10 drawn from the coil 12 wound with the metal strip is adjusted and supplied to the press device 18. In the press device 18, a plurality of collared through holes are formed in the supplied metal strip 10 by a pair of molds, and then cut into a predetermined width by a cutting blade 26 provided in the press device 18. The fin formation part which consists of an elongate body is formed. The fin forming portions sequentially enter the suction device 14, and when the fin forming portions having a predetermined length enter, the fin forming portions are cut into heat exchanger fins having a predetermined length by a cutting blade provided in the press device 18. The obtained heat exchanger fins are adsorbed by the suction device 14 and delivered to the stacker device 28.

A hitch feeder 29 as a feeding device shown in FIGS. 7 to 9 is provided on the outlet side of the press device 18 shown in FIG. Since the hitch feeder 29 has already been described, a detailed description thereof will be omitted here.
Further, on the inlet side of the press device 18, when the movement of the hitch feeder 29 in the feeding direction of the reciprocating body 50 (FIG. 9) stops, the metal strip is applied so as to apply a predetermined tension to the metal strip 10. A gripping device 60 for gripping 10 is provided.
As shown in FIGS. 2A and 2B, the gripping device 60 has cam members 68, 68, 68 on side plates 64, 64 erected on a base 62 on which the metal strip 10 runs on the upper surface. , And a rotating shaft 66 having a servo motor 72 as a driving means attached to one end thereof, and fixing members 70 and 70 are spanned. The servo motor 72 is synchronized with the rotation of the press device 18.
Each of the cam members 68, 68, 68 is hung between standing members 78, 78 erected on a gripping member 76 provided so as to be able to come in contact with and separate from the upper surface on which the metal strip 10 of the base 62 travels. It is in contact with a wheel-like member 82 that is rotatably mounted on the passed shaft 80.
A gripping material 74 made of a fibrous material such as felt is provided on the contact surface of the gripping member 76 that contacts the metal strip 10. As described above, by providing the gripping material 74 made of a fibrous material such as felt on the contact surface of the gripping member 76, the metal strip 10 can be sufficiently gripped and the surface of the metal strip 10 can be prevented from being damaged. .
As shown in FIG. 2B, the gripping member 76 is a spring 84 as a biasing member that biases the gripping member 76 toward the upper surface of the base 62 between the fixing members 70, 70 and the gripping member 76. , 84 are provided.

In the gripping device 60, the rotating shaft 66 is rotated by a servo motor 72 synchronized with the rotation of the pressing device 18, and the cam member 68 mounted on the rotating shaft 66 is wheel-shaped as shown in FIG. When reaching the position where the member 82 is pushed up, the gripping member 76 connected to the wheel-shaped member 82 is lifted against the urging force of the springs 84, 84, and between the gripping material 74 and the surface of the base 62. The gripping state of the metal strip 10 held by is released.
Further, the cam member 68 changes from a state where the wheel-shaped member 82 shown in FIG. 3A is pushed up to a state where it is pushed down as shown in FIG. 3B. In this state, the gripping member 76 connected to the wheel-shaped member 82 is lowered by the biasing force of the springs 84, 84, and grips the metal strip 10 between the gripping material 74 and the surface of the base 62.
The holding time and release time of the metal strip 10 can be adjusted by the shape of the cam members 68, 68, 68.

In the press device 18 shown in FIG. 1, a predetermined tension can be applied to the metal strip 10 between the hitch feeder 29 provided on the outlet side and the gripping device 60 shown in FIGS. 2 and 3.
FIG. 4A shows the state of applying the tension in the press device 18. In the press device 18, as shown in FIG. 4A, the time when the metal strip 10 is pressed is when the crankshaft angle (crank angle) of the press device 18 is 90 ° to 270 °. At this time, the metal strip 10 is stopped.
Since the metal strip 10 is transferred by the press device 18 by the hitch feeder 29 synchronized with the rotation of the press device 18 as described above, the metal strip 10 is fed at a crank angle of 270 °. Start and stop at 90 °.

In order to apply a predetermined tension to the metal strip 10 at the time when the feed of the metal strip 10 is stopped, a tension is applied to the metal strip 10 to the extent that no load is applied to the feed before the feed stop timing. It is preferable to do. For this reason, in FIG. 4 (a), after starting the feeding of the metal strip 10, the grip material 74 starts to contact the metal strip 10 at a crank angle of 330 °. 10, the metal strip 10 is surely gripped between the gripping material 74 and the surface of the base 62 as shown in FIG.
Further, the cam member 68 is rotated, and when the crank angle is 130 ° in FIG. 4A, as shown in FIG. 3A, the metal strip 10 placed on the gripping material 74 and the base 62 is shown. A gap is formed between the two.
Further, as shown in FIG. 4A, the timing at which the gripping material 74 starts to contact the metal strip 10 is set at a crank angle of 300 °, and the metal strip 10 placed on the gripping material 74 and the base 62. The time when a gap is formed between the crank angle and the crank angle may be 100 °.

By the way, in the case where a gripping material for gripping the metal strip 10 in contact with the metal strip 10 is provided in the mold of the press device 18, the holding time and release timing of the metal strip 10 by the gripping material are determined by the rotation of the press device 18. It cannot be adjusted independently. Further, in the press device 18, since the rise and fall of the mold are equal, as shown in FIG. 4C, when the grip release timing of the metal strip 10 is set to a crank angle of 100 °, the metal strip 10 and The grip start time when the grip material comes into contact is a crank angle of 260 °, which is a symmetrical position.
As described above, when the metal strip 10 and the gripping material come into contact with each other before the feeding of the metal strip 10 is started, an excessive load may be applied to the hitch feeder 29 that is a feeding device of the metal strip 10. Moreover, in the hitch feeder 29, the tip of the feed pin 52 is inserted into the collared through hole 11, so that the collared through hole 11 may be deformed by the feed pin 52.

In this regard, according to the gripping device 60 shown in FIGS. 2 and 3, as shown in FIGS. 4A and 4B, after the feeding of the metal strip 10, the metal strip 10 and the gripping material come into contact. Therefore, it is possible to prevent the hitch feeder 29 from being excessively loaded and the collared through hole 11 from being deformed.
In addition, when the feeding of the metal strip 10 is stopped, the metal strip 10 can be securely gripped by the gripping device 60 and a predetermined tension can be applied to the metal strip 10 with the hitch feeder 29. As a result, when the feeding of the metal strip 10 is stopped, the excessive feeding of the metal strip 10 can be prevented, and the occurrence of defective products due to the excessive feeding of the metal strip 10 can be prevented.

In the gripping device 60 shown in FIGS. 2 and 3, the gripping material 74 is urged against the metal strip 10 on the base 62 by the springs 84, 84, but is shown in FIGS. 5 (a) and 5 (b). A gripping device 60 can be used.
In the gripping device 60 shown in FIGS. 5A and 5B, the gripping material 74 is mounted on the bottom surface of the metal strip 10 placed on the top surface of the base 62 biased by the springs 86 and 86. A gripping member 76 is provided so as to be able to contact and separate. An eccentric cam 88 is provided between the standing members 78, 78 standing on the gripping member. By rotating the eccentric cam 88 by the servo motor 72, the state in which the grip of the metal strip 10 is released [FIG. 5 (a)] and the state in which the metal strip 10 is gripped [FIG. 5 (b)]. be able to.

It is the schematic explaining an example of the manufacturing apparatus of the fin for heat exchangers which concerns on this invention. It is the partial cross section front view and partial cross section side view explaining an example of the holding | grip apparatus provided in the entrance side of the press apparatus 18 shown in FIG. It is explanatory drawing explaining operation | movement of the holding | gripping apparatus shown in FIG. It is explanatory drawing explaining the relationship between operation | movement of the holding | gripping apparatus shown in FIG. 2, and operation | movement of a press apparatus. It is explanatory drawing explaining the other example of the holding | grip apparatus which can be used by this invention. It is the schematic explaining the manufacturing apparatus of the conventional fin for heat exchangers. It is the schematic for demonstrating the drive means of the feeder used for the press apparatus shown in FIG. It is the schematic explaining the reciprocating body driven by the drive means shown in FIG. It is explanatory drawing explaining the outline of the feeding apparatus used for the press apparatus shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Metal strip 11 Through-hole 12 Coil 14 Suction apparatus 16 Oil supply apparatus 18 Press apparatus 20 Mold apparatus 26 Cutting blade 28 Stacker 29 Hitch feeder 50 Reciprocating body 52 Feed pin 54 Slit 56, 84, 86 Spring 60 Grasp apparatus 62 Base Base 64 Side plate 66 Rotating shaft 68 Cam member 70 Fixing member 72 Servo motor 74 Fibrous material 76 Gripping member 78 Standing member 80 Shaft 82 Wheel-shaped member 88 Eccentric cam

Claims (2)

A feeding device that intermittently feeds the metal strip to a press device that drills a through-hole with a collar in the metal strip, and when the feeding of the metal strip by the feeding device to the pressing device stops, the feeding device A tension applying device having a gripping device for applying a predetermined tension to the metal strip, and a base on which the metal strip runs on the upper surface ,
The feeding device comprises a reciprocating body that reciprocates in the longitudinal direction of the metal strip, and a feed pin whose tip is urged in the direction of the metal strip by a biasing member provided in the reciprocating body,
When the reciprocating body moves in the feeding direction of the metal strip, the tip of the feed pin inserted in the collared through-hole drilled in the metal strip stops the feeding of the metal strip. The inner periphery of the collared through-hole so that it can escape from the collared through-hole against the biasing force of the biasing member when the reciprocating body moves in a direction opposite to the feeding direction of the metal strip. The tip of the pin that is in sliding contact with is formed on the inclined surface,
The gripping device is held in contact with and grips the metal strip so that when the movement of the reciprocating body of the feeding device in the feed direction stops, a predetermined tension is applied to the metal strip. When the reciprocating body starts to move in the feeding direction of the metal strip, a grip member that releases the grip, a cam member that grips the grip member in contact with the metal strip and releases the grip, and A servo motor that drives the cam member in synchronization with the rotation of the press device, a biasing member that biases the gripping member toward the top surface of the base, a standing member that stands on the gripping member, and a standing member A wheel-like member that is rotatably attached to the spanned shaft and abuts against the cam member;
The reciprocating body is a reciprocating body that reciprocates in synchronization with the rotation of the press device,
At the time of gripping the metal strip, the cam member pushes down the wheel member by the servo motor, the grip member connected to the wheel member is lowered by the biasing force of the bias member, and the grip member and the base Grip the metal strip between the surface of the
When the metal strip is released, the cam member pushes up the wheel-like member by the servo motor, and the gripping member connected to the wheel-like member rises against the biasing force of the biasing member. A tension applying device that releases the gripping state of the metal strip held between the base and the surface of the base . A press device that forms a plurality of collared through holes in a metal strip and cuts the metal strip into a predetermined length to produce heat exchanger fins, and a suction device that delivers the heat exchanger fins to a stack device A heat exchanger fin manufacturing apparatus comprising:
An apparatus for manufacturing a fin for a heat exchanger, wherein the tension applying device according to claim 1 is used.

Images