JPH0575659B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a feeding device for a metal strip, and more specifically, a device in which a plurality of through holes are bored at predetermined intervals in the feeding direction of the metal strip. This invention relates to a feeding device for metal strips used in heat exchanger fins, etc.

(Prior art) In heat exchangers for automobiles or household use such as room coolers, heat exchanger fins are used in which through holes are dotted in metal plates such as aluminum in order to increase the heat transfer efficiency of heat transfer tubes such as copper tubes. is used.

In other words, by inserting the heat exchanger tube into the through hole of the heat exchanger fin, and then expanding the heat exchanger tube to integrate the heat exchanger fin and the heat exchanger tube, the heat transfer area of the heat exchanger tube can be increased. It is.

By the way, such heat exchanger fins are usually
After holes are formed in a long metal strip made of aluminum or the like, the metal strip is cut into a predetermined length using a cutting machine or the like.

At this time, it is necessary to feed the metal strip into a cutting machine or the like, and a feeding device shown in FIG. 4 is used.

The feeding device shown in FIG. 4 includes a reciprocating body 16 which is provided so as to be able to reciprocate from side to side by a driving means (not shown), and which is biased upwardly by a spring 20 and has a tip end surface. A pin 18 whose portion is formed into an inclined surface is provided upright.

A portion of the tip of the pin 18 protruding from the upper surface of the reciprocating body 16 reciprocates with the reciprocating motion of the reciprocating body 16 while protruding from the upper surface of the reference plate.

In such a moving device shown in FIG.
As shown in FIG. A part of the side surface of the tip of the pin 18 comes into contact with the inner wall surface of the collared through hole 12 (hereinafter sometimes referred to as the through hole 12) and presses it in the direction of arrow A.

For this reason, the metal strip 10 is moved in the same direction as the direction of movement of the reciprocating body 16 (the direction of arrow B).
It can be sent in the direction.

On the other hand, as shown in FIG. 4b, the reciprocating body 16
When moving in the direction of arrow C, which is the opposite direction to the direction of arrow B shown in FIG. 4a, the metal strip 10 can be kept substantially stationary.

In other words, the inclined surface of the tip of the pin 18 moves in the direction of arrow C while slidingly contacting the edge of the through hole 12, and the pin 18 moves in the direction of arrow C.
A force that resists the biasing force of the spring 20 acts on the spring 8 .

Due to this force, the pin 18 is gradually pushed into the reciprocating body 16, and the height of the protruding portion of the pin 18 gradually becomes lower, so that the tip of the pin 18 becomes as shown in Fig. 4b.
As shown in the figure, it can be extracted from the through hole 12.

Therefore, the tip of the pin 18 slides into contact with the back surface of the metal strip 10, moves sequentially to the through hole 12 in the direction of arrow C, and can maintain a stationary state without being substantially sent to the metal strip 10. .

(Problem to be Solved by the Invention) According to the feeding device shown in FIG.
0 can only be sent in the direction of arrow A.

However, the feeding device shown in FIG. 4 feeds the metal strip 10 intermittently, and cannot be used when continuous feeding is required.

Moreover, the through holes drilled in the metal strip may be deformed during feeding, and heat exchanger fins with deformed through holes may cause a decrease in the workability of inserting heat transfer tubes into the through holes. , it becomes a product with no commercial value.

Furthermore, in metal strips used for heat exchanger fins, a plurality of slits and/or louvers are often formed between through holes in order to improve heat transfer efficiency. Therefore, in the feeding device shown in FIG. 4, the tip of the pin 18 comes into sliding contact with the back surface of the metal strip 10 to deform the slit, etc. It cannot be used as a body transport device.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a feeding device that can continuously feed a metal strip in a predetermined direction without deforming the through holes formed in the metal strip.

(Means for Solving the Problems) In order to achieve the above object, the present inventors have found that the tip of the feed pin, which moves in substantially the same direction and speed as the feed direction of the metal strip, is connected to the edge of the through hole or After considering and considering that it would be advantageous to fit into the through hole of the metal strip without making sliding contact with the back surface of the metal strip and move up and down so as to pull out from the hole after moving the metal strip, We have arrived at the present invention.

That is, the present invention provides a metal strip feeding device for use in heat exchanger fins, etc., in which a plurality of through holes are drilled at predetermined intervals in the feeding direction of the metal strip, and the feeding device includes the following steps: A reference plate in which slits extending in the feeding direction of the metal strip are formed so that the through holes drilled in the feeding device for the metal strip to be placed are positioned upward; and a lower part of the reference plate. A plurality of movable plates are provided on the base plate and are sequentially moved by a driving means in the feeding direction of the metal strip approximately parallel to the reference plate, and each of the movable plates has ends on the upper and lower sides of the movable plate. A feed pin is provided to penetrate the moving plate in a direction perpendicular to the moving direction so as to protrude at the same time, and is urged toward the lower surface of the moving plate by a biasing member, and a feeding pin is provided below the moving plate. The movable plate is moved so that it can be moved by fitting the tip of the movable pin that protrudes toward the upper surface of the movable plate into the through hole of the metal strip located above the slit in the reference plate. A feeding device for a metal strip is characterized in that it includes a plate cam that presses the rear end of the pin over a predetermined distance against the urging force of an urging member.

(Function) In the conventional feeding device shown in FIG. 4, the feeding pin that feeds the metal strip reciprocates, and the inclined surface at the tip of the feeding pin comes out of the through hole while slidingly contacting the edge of the through hole.

Furthermore, the tip of the feed pin that has passed through the through hole moves toward the adjacent through hole in a direction opposite to the feeding direction of the metal strip while slidingly contacting the surface of the metal strip.

Therefore, according to this device, the metal strip can only be fed intermittently, and the through holes and/or the slits formed between the through holes in the metal strip are easily deformed.

In this regard, according to the present invention, the plurality of movable plates on which the feeding pins are erected move sequentially in the feeding direction of the metal strip, thereby making it possible to continuously feed the metal strip.

Moreover, the feed pin of the device of the present invention moves in the vertical direction while moving in a direction parallel to the reference plate,
The tip of the feed pin can fit into the through hole and exit directly from below the through hole without making sliding contact with the back surface of the metal strip, so the through hole and/or through hole caused by the feed pin can be removed. Deformation of the slits etc. formed between the two can be avoided.

(Example) The present invention will be explained in more detail using the drawings.

FIG. 1 is an explanatory diagram illustrating one embodiment of the present invention.

In FIG. 1, a plurality of through holes 12 are bored on the reference plate 22 in the feeding direction (arrow A direction). A metal strip 10 used for heat exchanger fins is placed.

Furthermore, a slit 14 extending in the direction of feeding of the metal strip 10 is formed in the reference plate 22 located directly below each through hole 12 .

Below the reference plate 22, a plurality of moving plates 30 are guided in endless track-shaped grooves 52 (dotted chain lines) formed on both sides of the reference plate 22. These movable plates 30 are provided so as to be sequentially moved in the direction of arrow R by a drive wheel (not shown) driven by a servo motor or the like.

Therefore, the moving direction of the plurality of movable plates 30 located directly below the reference plate 22 is parallel to the reference plate 22 and in the same direction as the feeding direction of the metal body 10 (direction of arrow A).

Further, a plurality of feed pins 36 are attached to each moving plate 30 so as to penetrate through the moving plate 30 in a direction perpendicular to the moving direction of the moving plate 30, and the tip and rear ends of the feeding pins 36 are , protrudes from the upper and lower surfaces of the moving plate 30 at the same time.

Guide parts 40 shown in FIG. 2 are attached to both sides of the movable plate 30, and the movable plate 3
0 along an endless track-shaped groove 52.

In this guide section 40, two guide rollers 42 are connected by a link blanket 46, and power is transmitted to the ring blanket 46 by contacting the tip of a drive wheel (not shown). 48 rollers are installed upright.

FIG. 3 shows a partial sectional view of the moving plate 30 to which such a guide portion 40 is attached.

FIG. 3 shows the moving plate 30 that has moved directly below the reference plate 22, that is, the moving plate 30 at the position indicated by arrow X in FIG.

The guide section 40 shown in FIG. 2 has a central axis 45 (a second
It is screwed onto the movable plate 30 via the regulation guide 39 by a threaded portion 45' provided below in the figure.

The regulation guide 39 adjusts the pitch between the movable plates 30 and prevents the feed pin 36 from being misaligned in the lateral direction.

Guide rollers 42 that constitute this guide section 40,
42 guides the movable plate 30 along an endless track-shaped groove 52 formed in the guide plate 50.

The moving plate 30 used in this embodiment is
Two plates 32, 34 are stacked one on top of the other, and the plates are arranged so that a plurality of feed pins 36, 36... simultaneously protrude from the upper and lower sides of the moving plate 30 at their leading and rear ends. 32,
34.

A flange portion 33 is formed in the middle of the feed pin 36, and a spring member 35 is inserted into the space formed in the plates 32, 34.
The flange portion 33 is urged downward by.

Further, the tip of the feed pin 36 of the moving plate 30 located at the position of the arrow X in FIG. 1 enters the slit 14 of the reference plate 22 in the direction of the arrow A (FIG. Move to.

In the feeding device of this embodiment, as shown in FIG. 1, a trapezoidal plate cam 5 is provided below the reference plate 22.
0 is set.

When the movable plate 30 indicated by the arrow X moves onto the inclined surface 52 of the plate cam 50, the rear end surface of the feed pin 36 is pressed by the inclined surface 52 against the biasing force of the spring 35, and the feed pin 36 is moved upward. Due to the movement, the tip of the feed pin 36 is inserted into the through hole 12 of the metal strip 10.

On the horizontal surface 54 connected to the inclined surface 52, the feeding pin 36 moves together with the moving plate 30 while fitting its tip into the through hole 12.
The metal strip 10 can be moved in the direction of arrow A.

Furthermore, when the movable plate 30 moves onto the inclined surface 56 of the plate cam 50, the pressure exerted by the plate cam 50 on the rear end surface of the feed pin 36 gradually decreases, and the force of the spring 35 causes the feed Since the pin 36 moves downward, the tip of the feed pin 36 gradually comes out of the through hole 12.

The moving plano 3 that has passed through the plate cam 50 in this way
0 moves in the direction of arrow R guided by an endless track-shaped groove 52. During the movement, the roller 46 erected on the ring bracket 46 of the guide section 40
and a drive wheel (not shown) come into contact with each other to transmit power.

In this embodiment, as shown in FIG. 1, since a plurality of movable plates 30 are provided adjacent to each other, the power of the drive wheel is transferred to other movable plates 30 through the movable plates 30 in contact with the drive wheel. The information is transmitted to the moving plate 30, and the moving plate 30 moves into the groove 5.
It is possible to move along 2.

Therefore, when driving the drive wheel continuously,
The moving plate 30 can be moved continuously,
When driving the drive wheel intermittently, the moving plate 30 can be moved intermittently.

In this embodiment, in order to prevent the feed pin 36 from rattling, an oil-less metal 31 is provided as a guide at the end of the insertion hole of the plates 32, 34 into which the feed pin 36 is inserted, as shown in FIG. .

Also, the diameter of the tip of the feed pin 36 is
As long as the tip of the hole 6 can be inserted into and extracted from the hole 12, deformation of the hole 12 can be prevented by making the inner diameter as much as possible the same as the inner diameter of the hole 12. In this embodiment, the inner wall surface of the through hole 12 and the feed pin 36 are
The clearance with the outer surface was set to 1/100 to 0.1 mm.

According to the feeding device of this embodiment, the feeding pin 36 moves horizontally and vertically, and the tip of the feeding pin 36 can linearly fit into the through hole 12 and come out. , it is possible to prevent the through holes 12 from being deformed while the metal strip 10 is being fed.

Further, even if the through hole 12 has a shape other than circular, for example, a slit shape, the metal strip can be fed without changing the shape.

Further, even in a metal strip in which slits and/or louvers are formed between the through holes in order to improve heat transfer efficiency, the tip of the feed pin 36 does not come into sliding contact with the back surface of the metal strip, and the slits, etc. can be sent without deforming it.

In the embodiments described above, the feeding device for metal strips used for heat exchanger fins has been explained, but the feeding device of this embodiment can be used for other metal strips having through holes. It can also be applied to items used for this purpose.

(Effects of the Invention) According to the present invention, a metal strip in which a plurality of through holes are bored at predetermined intervals can be cut, etc. while being fed a certain amount in a predetermined direction without deforming the through holes. Can be processed.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram for explaining one embodiment of the present invention, FIG. 2 is a front view of the guide section, and FIG. 3 is a partial sectional view for explaining the guide section and the moving plate.
and FIG. 4 are explanatory diagrams for explaining a conventional feeding device. In the figure, 10...metal strip, 12...through hole, 14...slit, 22...reference plate,
30...Moving plate, 35...Spring, 36...
Feed pin, 40...guide section, 50...plate cam.

Claims (1)

[Claims] 1. A feeding device for a metal strip used for a film for a heat exchanger, etc., in which a plurality of through holes are drilled at predetermined intervals in the feeding direction of the metal strip, the feeding device comprising: , a reference plate having slits extending in the feeding direction of the metal strip so that each of the through holes drilled in the feeding direction of the metal strip to be placed is positioned upward; A plurality of movable plates are provided below and are sequentially moved by a driving means in the feeding direction of the metal strip approximately parallel to the reference plate, and each of the movable plates has an end portion on the upper surface side and the lower surface side of the movable plate. a feed pin that is provided through the movable plate in a direction perpendicular to the moving direction and is biased toward the lower surface of the movable plate by a biasing member so that the two protrude simultaneously; The movable pin protrudes from the lower surface of the movable plate so that the tip of the movable pin that is provided and protrudes from the upper surface of the movable plate can be moved by fitting into the through hole of the metal strip located above the slit of the reference plate. A feeding device for a metal strip, comprising a plate cam that presses a rear end of a moving pin over a predetermined distance against the biasing force of a biasing member.