JPH0785859B2 - Tube holder for heat exchanger core assembly - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tube holding device used for assembling a core part of a heat exchanger such as a condenser for a car cooler and a radiator.

2. Description of the Related Art Generally, assembling of a heat exchanger core is performed by holding tubes in parallel at predetermined intervals and then inserting fins into the spaces between the tubes.

Conventionally, as an apparatus for assembling such a core, for example, the 10th
A device as shown in FIGS. 1A and 1B is known (see Japanese Patent Laid-Open No. 64-78731).

The device (51) shown in the figure is a tube holding base for holding a large number of tubes (52) in parallel at predetermined intervals with a pair of left and right tube holding parts (64) (64). (53) and a tube transfer device (not shown) for intermittently transferring the holding base (53) in a mode in which the tube (52) held by the base (53) is intermittently transferred forward, that is, in the parallel direction. And a lower opening that is arranged above the base (53) and receives the fin (54) sent by compressed air from the opening at one end and temporarily accommodates the fin in parallel with the tube (52). -Shaped fin storage (5
5), the fin housing portion (55) and the tube transfer device (5
3) and a slide block (57) which is arranged so that it can be intermittently transferred forward and has a hole (56) for receiving the fin (54) in a vertically penetrating state, and inside the hole (56). A position setting device (58) (59) for setting the sent fin (54) to a predetermined position in the longitudinal direction thereof is arranged adjacent to the lower surface of the slide block (57). A forwardly projecting fin receiving plate (60) that closes the hole (56) from below, and a fin receiving plate (60) arranged in front of the fin receiving plate (60) above the slide block (57) and above the tube. Pusher plate (6
1) consists of and.

In this assembling apparatus (51), the fin (54) has the housing section (55).
When the slide block (57) is moved forward and the hole (56) is temporarily standing by at a position directly below the fin housing (55) in the state of being fed inside, the fins inside the housing (55) are (Five
4) falls into the hole (56) and is housed in the hole (56) with its lower surface supported by the fin receiving plate (60). Then, in this state, the slide block (57) moves forward, the position setting devices (58) (59) are activated during this transfer to set the position of the fins (54) in the longitudinal direction, and The fins (54) temporarily stand by in a position directly below the push-in plate (61). Then, in this standby state, the pushing plate (61) is moved downward, and the fins (54) are pushed and inserted into the gap between the tubes (52). Thereafter, the tube (52) is intermittently transferred by one pitch by the movement of the tube holding base (53), and the slide block (57) is also intermittently transferred forward, so that the fin inserting operation similar to the above is continuously performed. Is repeated.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above conventional device (51), as the fin (54) is repeatedly inserted into the gap between the tubes (52), the fin (54) is gradually inserted. It has the drawback of becoming less smooth.

That is, the fins (54) are usually designed to have a height slightly higher than the distance between the facing surfaces of the tubes (52) so that the fins (54) are inserted tightly between the tubes (52). There is. Therefore, when the fins are inserted, both tubes adjacent to the fins are slightly outwardly curved and deformed. This is not a problem at the initial stage of fin insertion, but the fins (54) are connected to the tubes (5
2) As it is inserted between the tubes, the outward bending amount of the tube (52) is amplified, and the gap between the tubes in which the fins are not inserted is narrowed. As a result, it becomes difficult to insert the fin (54) smoothly.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a tube holding device for a heat exchanger core assembly, which solves the conventional problems as described above and enables smooth insertion of fins between tubes.

Means for Solving the Problems In the above object, the present invention provides, within each gap between tubes of a plurality of tubes arranged in parallel at a predetermined interval, a height slightly higher than the gap distance between the tubes. A tube holding device for heat exchanger core assembly used for inserting large fins, the tube holding by a pallet or the like holding a plurality of tubes arranged in parallel at a predetermined interval on the upper surface side. And a tube pitch holding pin that is arranged so as to be capable of individually withdrawing from the lower position of the middle portion in the longitudinal direction of the tube into each gap between the tubes. It is characterized in that the pins are pushed by the fins when the fins are pushed into the tube-to-tube gap and are individually moved downward and out of the tube-to-tube gap. The gist is a tube holding device for assembling a heat exchanger core.

Function In the above device, each pin for holding the tube pitch, which is arranged to advance into each gap between the tubes, correctly holds each gap position between the tubes for inserting the fins, and also inside each gap between the tubes. Since the pins that are advanced to each other are configured to be able to individually withdraw from between the tubes, the pins that are present between the tubes do not hinder the insertion of the fins between the tubes.

Not only that, as in the case of the present invention, if the fin height is slightly larger than the gap distance between the tubes, the tubes on both sides sandwiching the fin tend to bend outward due to the insertion of the fin. , There is still a tube pitch holding pin in the tube gap where the fins are not inserted, that is, in the gap between the tubes where the fins are to be inserted.
This pin properly maintains the gap distance between the tubes so that the gap between the tubes does not become too narrow and it becomes difficult to insert the fins.

Moreover, in the process of sequentially inserting the fins from the inter-tube gaps located at the ends, of the two tubes that sandwich the inter-tube gap in which the fins are actually inserted, the side where the fins have already been inserted, that is, The tube located on the side where the pin is withdrawn can be flexibly deformed outwardly, so that the flexing deformation acts on the tube located on the side where the fin is about to be inserted. The pressure is therefore reduced, so that the two tubes that intervene in the intertube gap where the pin is still present to insert the fins do not pinch the pin tightly, and therefore the pin is not inserted during fin insertion. Does not make it difficult to exit from the gap between the tubes.

Examples Examples will be described below.

In the device (6) of this embodiment, as shown in FIG. 1, a large number of flat tubes (2) are arranged in parallel between a pair of cylindrical headers (1) (1) arranged in parallel. It is configured to hold a tube (2) in a so-called skeleton (A) state which is passed at intervals and whose both ends are connected to both headers (1) and (1) in a fitted state. The device of the present embodiment is used by incorporating it into the heat exchanger core automatic assembly device (4) in which the fins (3) are automatically inserted between the tubes.

In the heat exchanger core automatic assembling apparatus (4) shown in the figure, (6) is a tube holding apparatus according to the present invention, and (7)
Is a fin housing, and (8) is a fin pushing plate.

The tube holding device (6) includes a pallet (10) as a base for holding the tube (2) (that is, the skeleton (A)). The pallet (10) is detachably held by a pallet transfer device (not shown), and the transfer device intermittently moves the tube (2) as a whole toward the front in the parallel direction (arrow direction in FIG. 1). Is transferred intermittently. The mode of intermittent transfer of the pallet (10) by the transfer device will be described later.

The pallet (10) is formed in a rectangular plate shape having a predetermined plate thickness, and the upper surface of the pallet (10) is engaged with the outer peripheral surfaces of the headers (1) (1) of the skeleton (A) at a plurality of positions in the longitudinal direction. A mating skeleton fixing engagement part (11) is provided,
When the headers (1) and (1) are engaged with the engaging portion (11), the skeleton (A), and consequently the tube (2), is held in a positioned state on the upper surface of the pallet (10). .

Further, in the pallet (10), a retractable tube pitch holding pin (13) which is properly arranged in each gap between the tubes (2) at two positions on the left and right in the lengthwise intermediate portion in an advanced state. Are lined up.

The tube pitch holding pin (13) is incorporated in the pallet (10) with the following configuration.

That is, as shown in FIG. 2, a lower open concave portion (14) is formed on the lower surface of the pallet (10) in the parallel direction of the tubes (2), that is, in the front-rear direction. An actuating plate (16) is disposed inside of which an axis (15) is oriented in the front-rear direction to rotate in a seesaw shape. Further, on one side (left side in the figure) of the actuating plate (16) in the width direction (horizontal direction in the figure),
Tube pitch holding pin arrangement holes (17) penetrating from the inside of the recess (14) to the upper surface of the pallet (10) are arranged in a row in the front-rear direction, and the other side (right side in the figure) has a front-rear direction. Actuating pin placement holes (18) are drilled at the locations, and tube pitch holding pins (13) and actuating pins (19) are placed in each hole.
Are slidably arranged. A bush (20) is arranged inside the hole (17) in which the tube pitch holding pin (13) is arranged.
3) cannot move down in the arrangement hole (17) due to its own weight.

With this configuration, when a worker inserts a rod-shaped tool into the operation pin arrangement hole (18) from above the pallet (10) and pushes down the operation pin (19), the operation plate (16) moves the shaft core (15). The tube pitch is rotated clockwise around the center of the drawing, whereby all the tube pitch holding pins (13) are pushed up, and the tips thereof are projected above the upper surface of the pallet (10). On the other hand, when one of the tube pitch holding pins (13) is pushed down, the actuating plate (16) rotates in the opposite direction to the above and the tip of the actuating pin (19) is located above the placement hole (18). It is raised within the range that does not protrude from. In this state, the other tube pitch holding pin (17) is held by the push (20) in the arrangement hole (17) at the raised position. Then, the pin (13) in the projecting state is lowered by the forced pressing force acting on the upper end portion thereof.

In this way, the tube pitch holding pin (13) is entirely advanced upward by pushing down the operation pin (19), while the tube pitch holding pin (13) is independently retracted into the hole (17).

It should be noted that the pin for holding the tube pitch by the operating pin (13)
The pushing up of does not have to be performed all at once, for example, by arranging a plurality of operating pins on one side,
A configuration may be employed in which all tube pitch holding pins (13) are projected upward from the upper surface of the pallet (10) by sequentially pushing down each pin.

On the other hand, although the pallet transfer device is not shown, the pallet (1
0) Place the pallet (10) in the state where the tube (2) held above is positioned directly below the fin accommodating portion (7).
5 Move to the rear of the tube pitch and wait there temporarily,
After that, in a mode in which the operation of shifting to the front of the 1.5 tube pitch and then temporarily waiting there is repeated, the pallet (10) and eventually the tube (2) are intermittently transferred forward in the parallel direction as a whole.

Further, as shown in FIG. 1, the fin accommodating portion (7) is a chamber having an elongated upper and lower portions which is parallel to the tube (2) by the front and rear reference blocks (22) and the movable block (23). Has been formed. The reference block (22) is fixedly arranged in an immovable state, and the movable block (23) is moved toward and away from the reference block (22), so that the fins (7) housed in the fin housing (7) ( 3), but both blocks (22) (23) due to the approaching operation of the movable block (23)
It is supposed to be held in a holding state.

In addition, one end of the fin accommodating portion (7) in the lengthwise direction (first
At the opening (right end in the figure), a tip end opening of a rectangular tubular fin idler portion (25) serving as a fin feeding portion is coaxially arranged, and the fin (3) is fed by the action of compressed air. It is supposed to be fed from the part (25) into the fin accommodating part (7). A slit (26) in the lengthwise direction is formed in the central portion in the upper surface width direction of the fin idling unit (25), and a rotating arm (30) of a fin lengthwise position setting device (29) described next. Are allowed to enter the fin free-running section (25).

A fin lengthwise position setting device (29) is incorporated in the fin housing portion (7). The position setting device (29) includes a fin tip end abutting block (31) arranged at the tip (left end in FIG. 1) opening of the accommodating portion (7),
This is due to the rotation arm (30) which is pivotally supported and pivotally operated at one end at a position above the rear end portion side (right side in FIG. 1) of the accommodating portion. The tip end of the rotating arm (30) passes through the upper slit (26) of the fin idling part (25) and enters the idling part (25), and further inside the fin accommodating part (7). The fins (3) sent to the fin housing (7) are pushed toward the rear ends of the fins (3) and stopped at a predetermined position. It is preferable that the contact block (31) be positionally adjustable in the lengthwise direction of the accommodating portion (7).

In this position setting device (29), the tip of the rotating arm (30) pushes the rear end of the fin (3) in the fin housing (7) toward the tip to stop it at a predetermined position. , The tip of the fin (3) is brought into contact with the contact block (31),
Therefore, the position of the fin (3) in the length direction is set and the length of the fin (3) is adjusted to a predetermined length.

Further, the operation of the rotating arm (30) is such that the fin moves immediately after the rear end of the fin (3) has passed the entry start position of the tip of the arm (30) into the air feed section (25). It is preferable that the tip of the arm (30) is controlled so as to enter into the idle runway (25) in a manner to follow the above.

The push-in plate (8) is arranged above the fin housing portion (7) so as to be movable up and down, and when it is lowered, the pushing plate (8) enters into the housing portion (7) and the fins housed therein. The fins (3) are pushed down into the gap between the tubes (2) by pushing down (3).

The control method of the core assembling apparatus (4) having the above configuration is
It will be described together with the following description of the operation.

Next, the operation of the tube holding device (6) will be described together with the operation of the automatic assembling device (4).

First, as a preparatory step, as shown in FIG. 1, the skeleton (A) is placed on the pallet (10) and the engaging portion (1) is
In 1), fix the skeleton (A) in the positioning state. Next, a rod-shaped tool is inserted into the operation pin placement hole (18) (see the arrow in FIG. 2), and the tube pitch holding pin (13) is placed in the state of advancing into the gap between the tubes (2) of the skeleton (A). . And, this pallet (10)
It is assembled to a pallet transfer device (not shown) of the automatic core assembly device (4).

Then, the automatic assembly device device (4) is operated. Then, the fins (3) are fed into the fin housing part (7) from the fin empty space feeding part (25) in a state where the tube (2) is located immediately below the fin housing part (7). Figure 3 (a)
(B) shows a state in which the fins (3) are being fed into the fin accommodating portion (7) from the fin feeding portion (25) after inserting the fins (3) a plurality of times after starting the apparatus. Show. At the time of feeding the fins, as shown in the figure, the tube (2) is positioned in a standby state immediately below the accommodating portion (7), and the fins (3) slide on the upper edge of the tube (2). It is fed into the accommodating part (7) as it goes.

In the state shown in the figure, the movable block (23) is in a stand-by position with respect to the reference block (22), and the pushing plate (8) is in a stand-by position in the upper standby position.

Then, in a state before and after the rear end of the fin (3) leaves the idling section (25), as shown in FIG. Free-running section (25)
Then, the fins (3) move inward and move toward the inside of the accommodating portion (7) to push the rear end of the fin (3). Then, the tips of the fins (3) come into contact with the contact block (31), and the arm (30) stops rotating at a predetermined position, whereby the longitudinal position of the fin (3) is set.

Next, as shown in FIG. 5, the movable block (23) first moves closer to the reference block (22), and the fins (3) are held in a sandwiched state by both blocks (22) and (23). . The movable block (23) is automatically actuated when the sensor detects the housing state of the fins. Then, in that state, the pallet (10) is moved rearward by 0.5 tube pitch, and as shown in FIG. 6, the gap between the tubes (2) is positioned immediately below the fin accommodating portion (7), In that state, the transfer of the pallet (10) is temporarily stopped.

Then, as shown in FIG. 7, the pushing plate (8) is moved downward, the fins (3) in the accommodating part (7) are pushed into the gap between the tubes (2), and the fins are inserted. To be done. At the same time, the pin (13) for holding the tube pitch existing between the tubes (2) is pushed down by pushing in the fins (3). However, the pin (13) remains in the gap between the uninserted tubes. Therefore, the tube that is bent outward after the fin is inserted due to the fin height is the side where the fin is already inserted, that is, the left tube in FIG. 7, and the right tube is bent. There is no. Therefore, the non-inserted gap does not become narrow, and the fin does not become smooth as the insertion of the fin is repeated. This also allows the uninserted tube gap to stand by immediately below the fin accommodating portion (7) in a centering state, and allows the fin (3) to be inserted into the intertube gap in a stable state. .

Then, as shown in FIG. 8, the pushing plate (8) is
The lower surface thereof is lifted to a height at which it is flush with the lower surface of the accommodating portion (7), and temporarily stands by at that position. this is,
Prevents the next fin (3) from the fin feed section (25) from being fed into the accommodation section (7) while the tube-to-tube gap is still located just below the fin accommodation section (7). This is because

Then, after that, the pallet (10) is advanced by 1.5 tube pitch, and the tube (2) is positioned immediately below the fin accommodating portion (7) as shown in FIG. In that state, the pushing plate (8) is returned to the initial height position, the movable block (23) is moved away from the reference block (22), and the fin accommodating portion (7) can receive the fins. It will be in a state.

After that, as shown in FIG. 3 again, the fins are sent from the idling section (25) to the accommodating section (7), and the same operation as described above is performed. And after finishing inserting the fins,
The pallet (10) is taken out of the device and the skeleton with fins inserted is passed to the next work step, while the next pallet holding the skeleton (A) without fins is incorporated into the device and the fins are inserted in the same manner as above. Is being inserted.

The tube holding device of the present invention is not limited to being used by being incorporated in the above-described automatic assembly device (4), and the conventional automatic assembly device (shown in FIG. 10 described above ( 51), or it may be used as a tube holding device when an operator manually inserts fins into the intertube gap instead of assembling into the core automatic assembly device. Good. Further, the device of the present invention is not limited to a device for holding a skeleton, and a tube holding device for holding a tube by using a comb-like tube holding portion (64) (see FIG. 10) as in the conventional case. It is also possible to apply to.

Effects of the Invention Depending on the extension, the tube holder for heat exchanger core assembly of the present invention has a plurality of tubes arranged in parallel at a predetermined interval, and the tubes between the tubes are placed in the spaces between the tubes. A tube holding device for heat exchanger core assembly used for inserting fins slightly larger in height than a gap distance, wherein a plurality of tubes arranged in parallel at the above-mentioned predetermined intervals are provided on the upper surface side. A tube holding base such as a pallet that is held by the tube holding base is provided, and the tube holding base is arranged so that it can be individually withdrawn from the lower position of the middle portion in the longitudinal direction of the tube into each gap between the tubes. A holding pin is provided, and the pin is pushed by the fin when the fin is pushed into the intertube gap and individually withdrawn and moved downward from the intertube gap. It is something.

Therefore, the pins for holding the tube pitch, which are arranged to advance in the gaps between the tubes, can properly hold the positions of the gaps between the tubes for inserting the fins, so that the fins can be properly inserted. While you can go
The pins that have been advanced into the gaps between the tubes are configured to be able to be individually withdrawn from between the tubes so that the pins existing between the tubes prevent the fins from being inserted between the tubes. Needless to say, the fins can be inserted without any trouble.

Not only that, as in the case of the present invention, if the fin height is slightly larger than the gap distance between the tubes, the tubes on both sides sandwiching the fin tend to bend outward due to the insertion of the fin. , There is still a tube pitch holding pin in the tube gap where the fins are not inserted, that is, in the gap between the tubes where the fins are to be inserted.
This pin properly maintains the gap distance between the tubes, and therefore, the gap between the tubes does not become too narrow, which makes it difficult to insert the fins, and the fins can be inserted smoothly without any trouble. it can.

Moreover, in the process of sequentially inserting the fins from the inter-tube gaps located at the ends, of the two tubes that sandwich the inter-tube gap in which the fins are actually inserted, the side where the fins have already been inserted, that is, The tube located on the side where the pin is withdrawn can be flexibly deformed outwardly, so that the flexing deformation acts on the tube located on the side where the fin is about to be inserted. The pressure is therefore reduced, so that the two tubes that intervene in the intertube gap where the pin is still present to insert the fins do not pinch the pin tightly, and therefore the pin is not inserted during fin insertion. Does not easily come out of the gap between the tubes, and the fins can be smoothly inserted also from this aspect.

[Brief description of drawings]

1 to 9 show a tube holding device for assembling a heat exchanger core according to the present invention, and FIG. 1 is a schematic perspective view showing a tube holding device incorporated in a heat exchanger core automatic assembling device. FIG. 2 is a cross-sectional view of a pallet showing an operation mechanism of a tube pitch holding pin, and FIGS. 3 (A) and (B) are perspective views and cross-sectional views showing a state in which fins are fed from a feeding device into the fin accommodating portion. FIG. 4 is a sectional view showing a state in which the fins are positioned in the longitudinal direction in the fin housing portion, and FIG. 5 is a sectional view showing a state in which the fins are held between both side walls of the housing portion. Figure is a cross-sectional view showing the tube retracted 0.5 pitch backward in the parallel direction, Figure 7 is a cross-sectional view showing the push-down plate descending and inserting the fins between the tubes, and Figure 8 is the push-in operation. The lower surface of the plate is the lower surface of the fin housing It increased operating to a position flush with,
Therefore, the cross-sectional view showing the state of temporarily waiting, Fig. 9 shows that the tube advances forward 1.5 pitches in the parallel direction,
FIG. 7 is a cross-sectional view showing a state in which the pushing plate has returned to the original position and has been returned to the initial operating state. 10 (a) and (b) are cross-sectional views showing a conventional device. (2) ...... Tube, (3) ...... Fin, (6) ...... Tube holding device, (10) ...... Pallet (tube holding base), (13) ...... Tube pitch holding pin.

Claims (1)

[Claims] 1. A fin used for inserting a fin having a height slightly larger than a gap distance between the tubes into a gap between the tubes which are arranged in parallel at a predetermined interval. A tube holding device for assembling a heat exchanger, comprising: a tube holding base such as a pallet for holding a plurality of tubes arranged in parallel at predetermined intervals on an upper surface side; The tube base is provided with a tube pitch holding pin which is arranged so as to be capable of individually withdrawing from each position below the middle portion in the lengthwise direction of the tubes into each gap between the tubes, and the pin is provided for connecting the fins to the gap between the tubes. A tube holding device for a heat exchanger core assembly, wherein the tube holding apparatus for heat exchanger core assembly is adapted to be pushed by a fin when being pushed in and to be individually withdrawn and moved downward from a gap between the tubes.