JP6523464B2 - Metal strip feeder - Google Patents

Description

  The present invention relates to a feeding device for feeding, in a predetermined direction, a metal strip in which a plurality of through holes are provided at predetermined intervals in the feeding direction.

The heat exchanger such as the cooler is configured by laminating a plurality of heat exchanger fins in which a plurality of through holes into which the heat exchange tubes are inserted are formed.
Such heat exchanger fins are manufactured by the heat exchanger fin manufacturing apparatus shown in FIG.
In the heat exchanger fin manufacturing apparatus, an uncoiler 12 in which a thin plate (a metal strip) 10 made of metal such as aluminum is wound in a coil shape is provided. The metal strip 10 pulled out from the uncoiler 12 through the pinch roll 14 is inserted into the oil applying device 16, the processing oil is attached to the surface thereof, and is supplied to the mold device 20 provided in the pressing device 18. Ru.

The mold apparatus 20 is provided with an upper die set 22 capable of moving up and down, and a lower die set 24 in a stationary state. In the metal strip 10 which has passed through the mold apparatus 20, a plurality of collared through holes 11 (in the present specification, the through holes are simply referred to) in which a collar of a predetermined height is formed around the perforated through holes. May be formed at predetermined intervals in a predetermined direction.
The metal strip 10 is transferred by a predetermined distance in a predetermined direction, cut into a predetermined length by the cutter 26, and then stored in the stacker 28.

The press device 18 is provided with a feeding device for intermittently transferring in the direction of the cutter 26 the metal strip 10 in which a plurality of through holes 11 are formed at predetermined intervals in a predetermined direction.
FIG. 12 shows a feeding device provided with a spring-operated feed pin and a positioning pin (see, for example, FIG. 14 of Patent Document 1).

The feeding device moves the feed strip 200 in the transfer direction by moving the feed pin 200 from below into the through hole 11 formed in the strip 10 and moving the feed pin 200 in the feed direction. .
The metal strip 10 is placed on a reference plate (not shown). The reference plate is formed with a slit (not shown) opened in the range in which the feed pin 200 moves. The feed pin 200 protrudes upward from this slit.

The tip end portion of the feed pin 200 is formed with an inclined surface 200a which is inclined toward the upstream side in the feed direction. The feed pin 200 is biased upward by a spring 202 inside a reciprocating block 210 that reciprocates along the feed direction.
When the reciprocating block 210 moves in the feed direction with the tip of the feed pin 200 entering the through hole 11 of the metal strip 10, the downstream vertical surface 200b of the tip of the feed pin 200 is a through hole It abuts on the inner wall surface 11 and pulls the metal strip 10 in the transfer direction.

After transferring the metal strip 10 by a predetermined distance, the reciprocating block 210 returns in the direction opposite to the feeding direction. At this time, since the inclined surface 200a of the feed pin 200 is in sliding contact with the lower end edge of the through hole 11, the feed pin 200 gradually reciprocates against the biasing force of the spring 202 as it moves in the return direction. It is pushed inside.
Then, the feed pin 200 returned to the return position is elevated by the biasing force of the spring 202 and enters the through hole 11 existing at the initial position.

Further, a positioning pin 204 for positioning the transferred metal strip 10 is provided on the downstream side of the feed direction with respect to the position where the feed pin 200 reciprocates.
The positioning pin 204 is provided on the fixed block 212 and biased upward by a spring 205.

  The tip end portion of the positioning pin 204 is formed with an inclined surface 204 a inclined toward the upstream side in the transfer direction. When the metal strip 10 is fed by the feed pin 200, the positioning pin 204 is moved by the biasing force of the spring 205 so as to enter the through hole 11 on the downstream side of the through hole 11 into which the feed pin 200 is entering. Rises to position the metal strip 10.

  As the reciprocating block 210 moves in the feed direction from the initial position, the feed pin 200 pulls the metal strip 10 in the feed direction. At this time, the inclined surface 204a of the positioning pin 204 is in sliding contact with the end edge of the through hole 11 by the movement of the metal strip 10, and the positioning pin 200 gradually descends and is extracted from the through hole 11 and the positioning is released. .

In addition to the structure in which the vertical movement of the feed pin and the positioning pin as described above is performed by the biasing force of the spring, the vertical movement of the feed pin and the positioning pin is also forcibly performed.
FIG. 12 shows a feeding device for forcibly moving the feed pin and the positioning pin up and down as described above (see, for example, FIG. 2 of Patent Document 2).

The feeding apparatus shown in FIG. 12 is provided with a reciprocating block 210 which reciprocates along the feeding direction of the metal strip (here, the metal strip is not shown). The reciprocating block 210 reciprocates along a guide 208 supported by fixed blocks 222a, 222b.
A moving block 214 is provided on the reciprocating block 210. The moving block 214 is fixed to a shaft 218 which is movably bridged between fixing members 216 a and 216 b arranged at a predetermined distance on the top surface of the reciprocating block 210. Thus, the moving block 214 is movable in the direction of movement of the reciprocating plate 210 with the shaft 218.

A pin block 219 is provided on the moving block 214. The pin block 219 is composed of two plates 219a and 219b, and a feed pin 200 is provided upward from the plate 219b.
The pin block 219 is movable together with the movement block 214 and is movable up and down relative to the movement block 214.

An upper and lower cam portion 220 is provided between the moving block 214 and the pin block 219. The upper and lower cams 220 are composed of an upper cam 226 fixed on the side of the pin block 219 and a lower cam 227 provided on the side of the moving block 214. Asperities are formed on the opposing surfaces of the upper cam portion 226 and the lower cam portion 227, respectively.
The lower cam portion 227 is movably disposed on the moving block 214 located between the fixed members 216 a and 216 b and is formed longer than the moving direction of the moving block 214, and both ends of the moving block 214 in the feeding direction It is arranged to project from the part.

When one end of the lower cam portion 227 abuts on the fixing member 216 a, the convex portions formed on the upper cam portion 226 and the lower cam portion 227 abut each other to push up the pin block 219 upward, and the pin block 219 The tip of the feed pin 200 provided on the can be inserted into the through hole of the metal strip.
On the other hand, when the lower cam portion 227 slides in the direction of the fixing member 216b and the other end abuts on the fixing member 216b, the concave and convex portions formed in the upper cam portion 226 and the lower cam portion 227 are fitted. The pin block 219 can be lowered toward the moving block 214 to extract the tip of the feed pin 200 of the pin block 219 from the through hole of the metal strip placed on the reference plate 64.

The positioning pin 204 is moved up and down by a positioning cam portion 230 provided in the fixing member 222 b.
The positioning cam portion 230 is composed of an upper cam portion 230a and a lower cam portion 230b having concavo-convex portions formed on opposing surfaces facing each other, and the lower cam portion 230b has a large diameter longer in the feeding direction than the fixing member 222b. It is formed in the part 231.

The large diameter portion 231 of the lower cam portion 230 b is connected by a shaft 208 which passes through the reciprocating block 210.
The reciprocating block 210 moves in the feed direction, and the downstream end of the reciprocating block 210 in the feed direction abuts on the large diameter portion 231, whereby the convex portion of the lower cam portion 230b is a convex portion of the upper cam portion 230a. It goes down and pushes up the positioning pin 204. As a result, the raised positioning pin 84 is inserted into the through hole of the metal strip for positioning.

Also, another large diameter portion 232 is provided on the return direction side of the shaft 208. When the reciprocating block 210 returns to the return direction opposite to the feeding direction and returns to the initial position, the upstream end of the reciprocating block 210 in the feeding direction abuts on the large diameter portion 232 and the lower cam together with the shaft 208 The unit 230b is moved in the return direction.
Thereby, when the reciprocating block 210 is in the stage of sending the metal strip by the feed pin 200, the convex portion of the lower cam portion 230b is pulled out from the lower portion of the convex portion of the upper cam portion 230a, and the positioning pin 204 is lowered to metal It is extracted from the through hole of the band, and the positioning is released.

In addition, the reciprocation of the reciprocating block 210 mentioned above is performed by the drive means using the motive power of a press apparatus.
As shown in FIG. 13, the drive means includes a crank 30 that rotates in synchronization with the press device, and connects the connecting rod 32 to the eccentric pin of the crank 30. The connecting rod 32 is connected to a pin 44 connecting a first link 36 swinging around a pin 34 and a second link 42 linked to a lever 40 pivoting around a fulcrum shaft 38. There is. The first link 36 is provided with a cylinder device 37 that adjusts its peristaltic angle.

  When the crank 30 rotates, the connecting rod 32 pivots the lever 40 via the first link 36 and the second link 42. Then, as shown in FIG. 14, the link 46 is connected to the upper end portion of the lever 40. The link can reciprocate the reciprocating block 50 along the guide 48 in the transport direction.

Patent No. 4579782 Patent No. 3881991

  In the case of the structure in which the above-described vertical movement of the feed pin and the positioning pin is performed by the biasing force of the spring, there is a problem that the through hole may pass the positioning pin when the feed speed becomes high. is there.

  On the other hand, when the feed pin and positioning pin are forced to move up and down, the positioning pin is raised and positioned after the feed pin completes feeding, and the overrun is performed by lowering the feed pin after positioning. Can be prevented.

In the structure for forcibly moving the feed pin and the positioning pin up and down, as shown in FIG. 15, the feed operation of the feed pin, the vertical movement of the positioning pin, and the return of the feed pin by one press cycle of the press device Because the operation is performed, the time that can be used for feeding the metal strip is limited. For this reason, the feed amount of the metal strip can not be sufficiently secured unless the velocity and acceleration of the metal strip are increased. However, there is a possibility that the metal strip may be deformed when the velocity and acceleration of the feed are increased. There is a problem. Particularly in recent years, the metal strip has become very thin, and it is not preferable to apply a large load.
In addition, in the feeding method involving rapid acceleration or rapid deceleration, there is also a problem that the feeding accuracy of the metal strip is poor.

  Accordingly, the present invention is made to solve the above-mentioned problems, and an object of the present invention is to provide a feeding device capable of preventing occurrence of overrun and sufficiently securing the feeding time of a metal strip. .

According to the metal strip feeding device of the present invention, the metal strip having the plurality of through holes or notches is formed in the predetermined direction, and the metal strip is placed on the upper surface, A reference plate having a slit extending in the feeding direction of the metal strip communicating with the upper surface and the lower surface, and provided below the reference plate and parallel to the reference plate in the feeding direction of the metal strip and the opposite direction A reciprocating block that reciprocates, a driving device that reciprocates the reciprocating block, and a projection that protrudes upward from the reciprocating block and is biased toward the reference plate by a first biasing member, A leading end portion is provided below the reference plate and a feed pin inserted into a through hole or a notch portion of the metal strip placed on the reference plate, and the upper end face is directed to the downstream side in the feeding direction A first positioning pin which is formed as an inclined surface and is inserted into the through hole or notch of the fed metal strip to position the metal strip; and the through hole or notch of the metal strip The rising portion of the first positioning pin is started before the portion reaches immediately above the first positioning pin, and the through hole or the notch portion of the metal strip is fed to the upper end surface of the first positioning pin. A vertical movement device for moving the first positioning pin up and down so that the upstream end of the first positioning pin enters the through hole or the notch of the metal strip before reaching the position immediately above the first positioning pin; A second positioning pin which is inserted into a through hole or a notch of the fed metal strip on the downstream side or upstream side of the first positioning pin in the feed direction, and the second positioning pin for positioning the metal strip; Always And a second biasing member for biasing upward, wherein the second positioning pin is formed as an inclined surface whose upper end surface is inclined toward the upstream side in the transfer direction, and the through hole or the notch portion of the metal strip is When it reaches immediately above the second positioning pin, it is inserted into the through hole or notch of the metal strip by the biasing force of the second biasing member and positioned, and when the metal strip is fed in the feed direction The inclined surface is in sliding contact with the lower end surface of the through hole or the notch so as to be gradually lowered against the biasing force and extracted from the through hole or the notch.
By adopting this configuration, the first positioning pin ascends before the metal strip is fed in the feed direction, ie, before the inserted through hole or notch is completely fed to the feed position. And is reliably inserted into the through hole or the notch, so that overrun can be prevented. Further, for example, when the rotational drive of the press device is used as the drive device, the time relating to the vertical movement of the first positioning pin during one press cycle can be overlapped with the feed time, and a sufficient feed time can be secured.
Further, the second positioning pin can be inserted into the through hole or the notch after the overrun is prevented by the first positioning pin, and the positioning can be performed more accurately and accurately.

  Further, the vertical movement device reciprocates along the feed direction along with the reciprocating motion of the reciprocating block facing the upper cam portion to which the first positioning pin is attached and the upper cam portion. The lower cam portion has a lower cam portion, and when the reciprocating block moves in the feed direction, the lower cam portion is pressed and the lower cam portion pushes up the upper cam portion to raise the positioning pin. The lower cam portion may be pulled out from the lower side of the upper cam portion to lower the positioning pin by returning the reciprocating block in the direction opposite to the feeding direction.

  According to the present invention, since the overrun can be prevented and the time for the vertical movement of the positioning pin during one press cycle can be overlapped with the feeding time, the feeding time can be sufficiently secured.

It is a side view of a feeder for a metal strip according to the present invention. It is a side view when a reciprocating block moves to a feed direction. It is a side view which shows that a feed pin is inserted in the through-hole. It is a side view showing a situation where a feed pin is pulled out gradually from a penetration hole, and returns to a return direction. It is explanatory drawing which shows the positional relationship of a metal strip and a feed pin, a positioning pin, and a 2nd positioning pin. It is explanatory drawing which shows the place which moved the metal strip in the sending direction by the feed pin from FIG. It is explanatory drawing which shows the place which further moved the metal strip in the sending direction from FIG. FIG. 8 is an explanatory view showing that the feed pin has reached a predetermined position by further moving the metal strip from FIG. 7. It is explanatory drawing which shows the relationship between 1 cycle of a press, feeding operation | movement, and the up-down movement operation | movement of a positioning pin. It is an explanatory view explaining a schematic structure of a fin for heat exchanger fins. It is an explanatory view showing composition of a feed pin and a positioning pin which are projected and inserted by a spring. It is explanatory drawing which shows the structure of the feed pin and positioning pin which carry out forcedly in and out. It is explanatory drawing of the drive device of a reciprocating block. It is explanatory drawing which shows the connection relation of the drive device of FIG. 13, and a reciprocating block. It is explanatory drawing which shows the relationship between 1 cycle of the conventional press, the feeding operation | movement of the feed pin forcedly inserted and inserted, and the up-and-down movement operation of a positioning pin.

The preferred embodiments of the metal strip feeder according to the present invention will be described below.
1 to 2 are side views of the feeding device. About the manufacturing apparatus of the fin for heat exchangers in which such a feeder is provided, with reference to FIG. 11 demonstrated by the prior art, it does not illustrate again here.
In addition, the same components as the components described in the prior art are given the same reference numerals, and the description thereof may be omitted.

  In addition, as the metal strip 10 of the embodiment described here, an example in which a through hole into which a heat exchange tube of a round tube is inserted is formed will be described as an example.

First, the outline of the operation of the feeder will be described.
The feed device inserts a plurality of feed pins 68 into the through holes 11 formed in the metal strip 10, moves the feed pins 68, pulls the metal strip 10 by the feed pins 68, and transfers it to a predetermined position. It is a device that
Then, after the metal strip 10 is pulled to a predetermined position, the feed pin 68 is lowered and extracted from the through hole 11 of the metal strip 10 and returns to the initial position.

The feeding apparatus includes a reciprocating block 100, a feed pin 68 provided on the reciprocating block 100, driving means for reciprocatingly driving the reciprocating block 100, and a reference plate 64 on which the metal strip 10 is mounted. ing. The reference plate 64 is formed with a slit 65 opened in the range in which the feed pin 68 moves. The feed pin 68 protrudes upward from the slit 65.
The reciprocating block 100 is fixed to a guide 48 disposed along the feed direction. The reciprocating block 100 reciprocates along the feed direction by the reciprocating motion of the lever 40 together with the guide 48.

The driving device for driving the reciprocating block 100 of the feeding device will be described again based on FIGS. 13 and 14 described in the prior art.
The driving means connects the connecting rod 32 to the eccentric pin of the crank 30 which rotates in synchronization with the pressing device 18, and rotates the first link 36 swinging around the pin 34 and the lever swinging around the fulcrum shaft 38 A second link 42 connected to 40 is connected to a pin 44 at the lower end of the connecting rod 32. The first link 36 is provided with a cylinder device 37 that adjusts its swing angle. In this manner, the connection rod 32 reciprocates the lever 40 via the first link 36 and the second link 42 by the rotation of the crank 30 synchronized with the press device 18.

(Structure and operation of feed pin)
The feed pin 68 provided on the reciprocating block 100 is always urged upward by a spring 56 as an example of a first urging member.
The upper end surface of the feed pin 68 is formed as an inclined surface 68 a whose upper end surface is inclined toward the upstream side in the transfer direction.

The positional relationship between the feed pin and the metal strip will be described based on FIGS. 3 and 4.
In FIG. 3, the through hole 11 of the metal strip 10 is located immediately above the feed pin 68, and the feed pin 68 is inserted into the through hole 11 by the biasing force of the spring 56. When the reciprocating block moves in the feed direction, the metal strip 10 is pulled by the feed pin 68 and moved in the feed direction.

In FIG. 4, one time of feeding of the metal strip 10 is completed and the metal strip 10 is positioned at a predetermined position, and the position of the metal strip 10 is fixed by the first positioning pin and the second positioning pin described later. There is.
In this state, when the reciprocating block 100 moves in the return direction opposite to the feed direction, the inclined surface 68a of the feed pin 68 is in sliding contact with the lower end edge of the through hole 11 in the feed direction, gradually It descends while moving. Although the feed pin 68 is biased upward by the spring 56, the feed pin 68 is biased by making the biasing force of the spring 56 weaker than the force of movement of the feed pin 68 in the return direction. Finally, it is located on the lower surface of the metal strip 10 and can be moved in the return direction without pulling the metal strip 10.

  When the reciprocating block 100 starts moving in the return direction opposite to the feed direction, the inclined surface 68a of the feed pin 68 slides on the lower end edge of the through hole 11, so the metal strip 10 moves in the return direction. It is pulled. However, since the downstream end face 102 b of the tip of the second positioning pin 102 abuts on the inner wall surface of the through hole 11, the metal strip 10 does not move in the return direction. If there is no second positioning pin 102 and only the first positioning pin 84, the inclined surface 84b of the first positioning pin 84 faces downstream, so the metal strip 10 may move in the return direction. is there.

(Configuration and operation of first positioning pin)
The configuration and operation of the first positioning pin will be described based on FIGS. 1 and 2.
As mentioned above, the metal strip 10 fed by the feed pin 68 needs to be positioned at the predetermined position. For this reason, the first positioning pin 84 which enters into the through hole 11 of the metal strip 10 is provided after the end of the feeding operation.

The first positioning pin 84 is operated by a vertically moving device which is forcibly moved up and down at a predetermined timing.
The first positioning pin 84 is provided to project in the vertical direction together with the fixing block 52. An upper cam portion 86 for moving the fixed block 52 up and down is provided on the lower surface of the fixed block 52. On the lower surface of the upper cam portion 86, a plurality of convex portions 86a protruding downward are formed.
Below the upper cam portion 86, a lower cam portion 87 is disposed in which a plurality of convex portions 87a are formed facing the convex portions 86a of the upper cam portion 86 and projecting upward.

The lower cam portion 87 is formed on the upper surface of a wide material which is wider than the fixed block 52 and is slidable along the feed direction.
When the lower cam portion 87 slides in the direction in which the two convex portions 86a and 87a join, the convex portion 87a of the lower cam portion 87 enters the lower surface of the convex portion 86a of the upper cam portion 86, and the fixed block 52 is upward Pushed up.

  When the fixing block 52 is pushed upward, the tip of the first positioning pin 84 protrudes on the reference plate 64 and is inserted into the through hole 11 of the metal strip 10 mounted on the reference plate 64, and the metal The band 10 is positioned.

  On the other hand, when the lower cam portion 87 slides in the direction in which the convex portion 87 a is pulled out from the lower surface of the convex portion 86 a of the upper cam portion 86, the tip of the first positioning pin 84 is below the reference surface of the reference plate 64. It is positioned and taken out from the inside of the through hole 11 of the metal strip 10 placed on the reference plate 64 to release the positioning of the metal strip 10.

The end on the return direction side of the lower cam portion 87 is connected to the shaft 90. The shaft 90 is disposed along the feed direction, and forms large diameter portions 88, 89 at two locations. The reciprocating block 100 can reciprocate between the large diameter portion 89 provided on the feed direction side of the shaft 90 and the large diameter portion 88 provided on the return direction side of the shaft 90.
In the lower part of the reciprocating block 100, a through hole 105 for allowing the shaft 90 to pass therethrough is formed. The diameter of the through hole 105 is a diameter that does not prevent the reciprocating block 100 from reciprocating.
A through hole (not shown) is also formed in the positioning block 104. The through hole has a diameter that does not prevent the large diameter portion 89 of the shaft 90 from reciprocating.

In the state shown in FIG. 1, the reciprocating block 100 is moved in the return direction, and the return direction side surface of the reciprocating block 100 is in contact with the large diameter portion 88 of the shaft 90.
When the reciprocating block 100 abuts on the large diameter portion 88 of the shaft 90 and presses in the return direction, the entire shaft 90 moves in the return direction. Thereby, the lower cam portion 87 is pulled out from the lower surface of the convex portion 86a of the upper cam portion 86, and the tip end portion of the first positioning pin 84 is lowered and mounted on the reference plate 64. The metal strip 10 is removed from the inside of the through hole 11 of the metal strip 10 and the positioning of the metal strip 10 is released.

In the state shown in FIG. 2, it is shown that the reciprocating block 100 moves in the feed direction and the feed direction side surface of the reciprocating block 100 abuts on the large diameter portion 89 of the shaft 90.
When the reciprocating block 100 abuts on the large diameter portion 89 of the shaft 90 and presses it in the feed direction, the entire shaft 90 moves in the feed direction. Thereby, the convex portion 87a of the lower cam portion 87 enters the lower portion of the convex portion 86b of the upper cam portion 86, and the tip end portion of the first positioning pin 84 ascends and is mounted on the reference plate 64. The metal strip 10 is positioned in the through holes 11 of 10.

Further, the upper end surface of the first positioning pin 84 is formed as an inclined surface 84 a that is inclined toward the downstream side in the transfer direction.
The reason why the upper end surface of the positioning pin 84 is formed as the inclined surface 84a as described above will be described later.

  The vertical movement device of the first positioning pin 84 is not limited to the above-described plate-type cam. Alternatively, a cylindrical cam or an air cylinder may be employed.

(Configuration and operation of second positioning pin)
In addition to the first positioning pin 84 described above, the second positioning pin 102 is provided in the present embodiment.
The second positioning pin 102 is provided on the positioning block 104, and is always urged upward by a spring 106 as an example of a second urging member.

  The upper end surface of the second positioning pin 102 is formed as an inclined surface 102 a that inclines toward the upstream side in the transfer direction. That is, the inclination directions of the inclined surface 84 a at the tip of the first positioning pin 84 and the inclined surface 102 a at the tip of the second positioning pin 102 are opposite to each other.

Unlike the reciprocating block 100, the positioning block 104 does not move. Therefore, the second positioning pin 102 is inserted into the through hole 11 which has reached immediately above by the biasing force of the spring 106 to perform positioning.
When the metal strip 10 is moved by the feed pin 68, the inclined surface 102a of the second positioning pin 102 is in sliding contact with the lower end edge of the through hole 11 on the upstream side in the feed direction, and gradually descends.
Although the second positioning pin 102 is biased upward by the spring 106, by making the biasing force of the spring 106 weaker than the force for moving the metal strip 10 by the feed pin 68, The positioning pin 102 is finally located on the lower surface of the metal strip 10 and can be released from the positioning.

  The second positioning pin 102 may be disposed upstream or downstream of the first positioning pin 84 in the feeding direction.

(Description of feeding operation and positioning operation)
Next, the feed operation by the feed pin 68 and the positioning operation by the first positioning pin 84 and the second positioning pin 102 will be described based on FIGS. 5 to 8.

FIG. 5 shows a state when the feeding operation of the metal strip 10 is started from the initial position.
At this time, the feed pin 68 is inserted into the through hole 11 disposed at the initial position by the biasing force of the spring 56.
If the metal strip 10 is still in the stopped state, the second positioning pin 102 has entered the through hole 11 at the predetermined position.
In addition, since the reciprocating block 100 moves the shaft 90 in the return direction when the reciprocating block 100 returns to the initial position, the first positioning pin 84 is already lowered at the time of FIG. .

FIG. 6 shows the reciprocating block 100 moving in the feed direction and approaching a predetermined position.
When the metal strip 10 moves in the feed direction, the second positioning pin 102 slides down while the inclined surface 102 a abuts on the lower end edge of the through hole 11 on the upstream side in the feed direction. It is located below. The second positioning pin 102 is not lifted by the biasing force of the spring 56 unless the through hole 11 moves immediately above.

In addition, the first positioning pin 84 starts to rise immediately before the through hole is completely moved immediately above.
That is, the timing at which the large-diameter portion 89 abuts on the downstream side surface of the reciprocating block 100 in the feed direction is the upstream end of the first positioning pin 84 in the feed direction downstream end of the through hole 11 of the metal strip 10 The size in the feeding direction of the large diameter portion 89 or the reciprocating block 100 may be adjusted so as to be positioned at the portion.

6 to 7 show the stage in which the through hole 11 to be positioned next is moving toward the first positioning pin 84.
In FIG. 6, at the stage where the downstream end of the through hole 11 in the feeding direction reaches near the upstream end of the first positioning pin 84 in the feeding direction, the first positioning pin 84 starts to ascend. It shows.
FIG. 7 shows that the first positioning pin 84 is gradually entering into the through hole 11 which is still moving.

Since the upper end portion of the inclined surface 84a of the first positioning pin 84 is inclined toward the downstream side in the feeding direction, the feeding direction upstream end portion 84b of the upper end portion of the first positioning pin 84 protrudes upward from other positions ing.
Therefore, the upstream end portion 84 b of the first positioning pin 84 in the feed direction can enter into the moving through hole 11 before the through hole 11 is positioned completely right above the first positioning pin 84.

  When the metal strip 10 is still in the feeding operation and is not positioned immediately above the second positioning pin 102 (the state shown in FIGS. 6 to 7), the second positioning pin 102 does not rise.

In this manner, since the first positioning pin 84 can gradually enter the through hole 11 in motion, the time and feeding time for the vertical movement of the first positioning pin in one cycle of press can be calculated. It can be superimposed, and a sufficient feed time can be secured (this is shown in FIG. 9).
Therefore, the feeding accuracy can be enhanced without applying an excessive load to the metal strip 10 to be fed.

FIG. 8 shows that the feed operation by the feed pin 68 is finished and the feed pin 68 has reached a predetermined position.
At this time, the first positioning pin 84 completely enters into the through hole 11 to perform positioning, and the second positioning pin 102 also enters into the through hole 11 to perform positioning.
Positioning by the second positioning pin 102 as well as the first positioning pin 84 in this manner enables accurate and reliable positioning.

After the end of the feeding operation, while the positioning operation is being performed by the first positioning pin 84 and the second positioning pin 102, the reciprocating block 100 returns in the return direction opposite to the feeding direction. Along with this, the feed pin 68 also returns to the initial position. At this time, the downstream end surface of the second positioning pin 102 abuts on the through hole 11 so that the metal strip 10 does not return in the return direction, and positioning is ensured.
Then, as the reciprocating block 100 presses the large diameter portion 88 of the shaft 90 in the return direction, the lower cam portion 87 is pulled out in the return direction, the upper cam portion 86 descends, and the first positioning pin 84 is a through hole. It is extracted from 11.

  Here, referring to FIG. 9, by adopting the configuration of the present invention, it is possible to superimpose switching between pins on the feed operation and the return operation. Therefore, it is possible to use a half of the time in one press cycle for the feed operation and the remaining half of the time for the return operation, and to secure a sufficient feed time.

In addition, as a metal strip mentioned above, the thing in which the through-hole into which the heat exchange tube of a round tube is inserted was formed was demonstrated as an example.
However, the metal strip is not limited to such a shape, and may be a metal strip having a notch into which the flat tube is inserted.

  Although the preferred embodiments of the present invention have been described above in various manners, the present invention is not limited to these embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. .

Claims (2)

In a feeding device for feeding a metal strip in which a plurality of through holes or notches are formed in a predetermined direction,
A reference plate on which a metal strip is placed on the upper surface, and a slit extending in the feeding direction of the metal strip is formed by communicating the upper surface and the lower surface;
A reciprocating block provided below the reference plate and reciprocating in the feeding direction and the opposite direction of the metal strip parallel to the reference plate;
A driving device for reciprocating the reciprocating block;
It projects upward from the reciprocating block and is urged toward the reference plate by the first urging member, and when rising, the tip end is in the through hole or notch of the metal strip placed on the reference plate. A feed pin inserted into the
The upper end surface is formed as an inclined surface which is provided below the reference plate and inclined toward the downstream side in the feed direction, and is inserted into the through hole or notch of the fed metal strip to A first positioning pin for positioning;
The through hole or the notch of the metal strip starts the rising of the first positioning pin before the through hole or the notch of the metal strip reaches immediately above the first positioning pin, The first positioning pin is arranged such that the upstream end of the upper end face of the first positioning pin enters the through hole or notch of the metal strip before it reaches the position immediately above the first positioning pin An up-and-down motion device that moves the
A second positioning pin which is inserted into a through hole or a notch of the fed metal strip on the downstream side or upstream side of the first positioning pin in the feeding direction, to position the metal strip;
And a second biasing member for always biasing the second positioning pin upward.
The second positioning pin is formed as an inclined surface in which the upper end surface is inclined toward the upstream side in the transfer direction, and when the through hole or the notch portion of the metal strip reaches immediately above the second positioning pin, the second positioning pin is attached. Positioning is performed by inserting the metal strip into the through hole or notch by the biasing force of the biasing member, and when the metal strip is fed in the feed direction, the inclined surface slides on the lower end face of the through hole or notch A feeding device for a metal strip characterized by being lowered gradually against the biasing force by being in contact and being extracted from the through hole or the notch. The vertical movement device is
An upper cam portion to which the first positioning pin is attached; and a lower cam portion which is opposed to the upper cam portion and reciprocates along the feeding direction along with the reciprocating motion of the reciprocating block. As the reciprocating block moves in the feed direction, the lower cam portion is pressed and the lower cam portion pushes up the upper cam portion to raise the positioning pin, and the reciprocating block is opposite to the feed direction. 2. The metal strip feeder according to claim 1, wherein the lower cam portion is pulled out from the lower side of the upper cam portion by returning in a direction to lower the positioning pin.

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