JP2003220432A - Pipe expanding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe expanding device for efficiently manufacturing a heat exchanger by integrating a multiple superposed heat radiation fin and a plurality of pipes inserted into the heat radiation fin by press-fitting a pipe expanding mandrel to expand the pipe into the pipe. <P>SOLUTION: An operating plate 6 having a plurality of the pipe expanding mandrels 7 and provided freely ascendably/descendably, a pair of first guide bars 10 at the lateral position on the front side of an end plate 9, and a pair of second guide bars 11 at the lateral position on the rear side, are respectively provided apart between a base part 2 and a ceiling part 4. At least either of the front side or the rear side of the end plate 9 is mounted freely slidably on at least either of the first guide bars 10 or the second guide bars 11. A guide passage 2a of a conveying body 23 to transfer the heat exchanger is provided on the base part so as to be passable. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention integrates a heat-dissipating fin that is multi-polymerized and a plurality of pipes inserted through the heat-dissipating fin by press-fitting a pipe-expanding mandrel for expanding the pipe into the pipe to integrally heat the pipe. The present invention relates to a tube expanding device for manufacturing an exchanger.

[0002]

2. Description of the Related Art Conventionally, for example, as shown in FIG.
As shown in FIG.
A ceiling portion 52 is laid across the upper ends of the pipes 1, 51, a cylinder 53 is attached to the ceiling portion 52, and a plurality of pipe expanding mandrels are mounted on an operation plate 54 that can be raised and lowered through expansion and contraction of the cylinder 53. The configuration in which 55 is provided is general.

The pipe expanding mandrel 55 has a base portion 50.
Since it is formed of a rod body having a small diameter and a long diameter so as to match the pipe diameter and pipe length of the heat exchanger positioned in the pipe, the pipe expanding mandrel 55 is restricted in its lateral direction at the time of press-fitting. It is necessary to support the mandrel 55 at an appropriate position.

Therefore, in the tube expanding apparatus, a plurality of guide plates 56 are provided below the operating plate 54 in order to restrict the lateral bending of the tube expanding mandrel 55 during press fitting.
And a tubular stripper (not shown) at the lowermost position of the guide plate 56, which is fitted onto the pipe and pushes down the end face thereof in order to adjust the pipe length of the pipe protruding from the end face of the heat exchanger body. End plates 57 are provided, and the pipe expanding mandrels 55 are inserted into the respective end plates 57.

The operating plate 54, the guide plate 56, and the end plate 57 are a pair of left and right guide bars 58 for vertically connecting the base 50 and the ceiling 52.
The operating plate 54, the guide plate 56, and the end plate 57 can be moved up and down along the guide bar 58 while maintaining a parallel relationship with each other.

The operating plate 54 and the guide plate 5
6 and the end plate 57, the suspension bolt 5
9 is inserted (the right side is not shown in the drawing), and the maximum opening distance between the operating plate 54, the guide plate 56, and the end plate 57 is achieved by engaging the retaining heads 59a provided at both ends of the suspension bolt 59. Has been decided.

A guide bar 58 is provided on the operating plate 54, the guide plate 56 and the end plate 57.
A pair of ball screws 60 parallel to each other are inserted, and the lower end thereof is rotatably supported by the end plate 57.

An upper stopper 61 is screwed onto each of the ball screws 60, and the upper stopper 61 is brought into contact with an approximately half arc surface of a cylindrical guide bar 58 (guide post). When the ball screw 60 is rotated through a driving device such as a motor (not shown), the upper half stopper 61 slides along the guide bar 58 and the upper stopper 61 moves vertically along the ball screw 60. Screw on.

The upper stopper 61 passes through a long hole 56a formed in the guide plate 56 and can come into contact with the back surface of the operating plate 54.

Further, between the base portion 50 and the end plate 57, the lower side for regulating the pipe length of the pipe protruding from the end face of the heat exchanger main body by restricting the lowering of the end plate 57. A stopper 62 is provided.

The guide bar 58 is inserted in the front side of the lower stopper 62, and the rear side is slidably attached to a guide rail 63 fixed to the support column 51.

The guide bar 58 and the guide rail 63 are also provided.
The lower stopper 62 is screwed between the lower stopper 62 and the lower stopper 62, which is parallel to the lower stopper 62 and the lower stopper ball screw 64.
However, its lower end is rotatably supported by the base 50.

Therefore, when the lower stopper raising / lowering ball screw 64 rotates through a driving device such as a motor (not shown), the lower stopper 62 is in a state of being steady by the guide bar 58 and the guide rail 63. And smoothly screw up and down.

The lower stopper 62 having such a structure
Regulates (stops) the lowering of the end plate 57 by contacting the back surface side of the end plate 57 that descends together with the operating plate 54 that descends as the cylinder 53 extends.
You can do it.

[0015]

However, in the tube expanding device having the above-mentioned conventional structure, since the operating plate 54, the guide plate 56 and the end plate 57 are respectively inserted through the pair of left and right guide bars 58, they are mutually different. In order to smoothly move the plates up and down along the guide bar 58 while maintaining the parallel relationship, the guide bar 58 must be inserted at the center position of each plate.

Therefore, not only does the guide bar 58 inevitably close the left and right sides of the base 50, but usually various hydraulic units, control boards, etc. (not shown) are provided on the rear side of the tube expanding device. Since the heat exchanger is installed, the heat exchanger is installed in the base part 5
Carrying in from 0 only in the front direction of the pipe expanding device (arrow P)
The structure is such that it cannot be carried out.

Therefore, when a heat exchanger production line is constructed in order to improve the productivity of the heat exchanger, the heat exchanger is carried into the pipe expanding device, or heat is exchanged from the pipe expanding device to another place or device. When carrying out the container, it is necessary to carry out in the left-right direction (arrow Q) of the pipe expanding device, but due to the above reason, a folded portion is generated in the transport path of the production line, and as a result, transport efficiency is deteriorated Not only that, but a special transport mechanism for the folded-back portion is required, which causes various problems that the manufacturing cost of the apparatus itself rises.

Therefore, the present invention has been made in view of the above problems, and the transport path of the heat exchanger is made straight, that is, the heat exchanger is carried in from one side (left-right direction) of the tube expanding device,
By adopting the method of carrying out the heat exchanger from the other side, that is, the other side (so-called center through method), it is possible to build a suitable production line that can improve the transfer efficiency and improve the productivity of the heat exchanger. It is an object of the present invention to provide a simple tube expanding device.

[0019]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides an apparatus frame with a base (2) and a ceiling (4) facing each other and columns (3) connecting the respective rear sides. (1) is formed, and further, an operating plate (6) provided with a plurality of pipe expanding mandrels (7) between the base part (2) and the ceiling part (4) so as to be movable up and down, The descent is regulated by contacting a stopper (19) which is suspended and supported below the operating plate (6) and which is positioned in accordance with the height position of the heat exchanger set on the base (2). In the tube expanding device including the end plate (9), a pair of first first and second left and right positions of the end plate (9) are provided between the base part (2) and the ceiling part (4). A pair of guide bars (10) and left and right positions on the rear side of the end plate (9). Second guide bars (11) are provided separately from each other, and at least one of the front side and the rear side of the end plate (9) is the first guide bar (10) or the second guide bar. (1
1) is slidably attached to at least one of the above, and the stopper (19) is provided near the second guide bar (11), near the column (3), or near the first guide bar (10). It is slidably provided on at least one of the first guide bar (10) and the second guide bar (11) via a stopper elevating means provided, and the base part (2) is At least one of the guide path (2a) of the transfer body (23) carrying the heat exchanger and the guide path (2a) for installing the transfer device is
Provided within the distance between the first guide bar (10) and the second guide bar (11) so that the heat exchanger can pass through from one side of the base portion (2) to the other side. There is a point.

Therefore, at least one of the front side and the rear side of the end plate (9) is slidable on at least one of the first guide bar (10) and the second guide bar (11). Since it is attached, it is located below the end plate (9), that is, on both sides (left and right direction) of the tube expanding device, while moving the end plate (9) in the up-down direction with the steady rest. In order to carry in the heat exchanger from one side (left and right direction) of the tube expanding device between the end plate (9) and the base part (2) and carry out the heat exchanger from the opposite side (other side). Not only can the space passage (R) be provided within the distance between the first guide bar (10) and the second guide bar (11), but the space passage (R) can be used to provide a base. Part (2) with heat exchanger Guide path of the probe transfer body (23) (2
a) or a guide path (2a) for installing a transfer device (not shown)
At least one of them can be provided so as to be able to pass through the heat exchanger from one side to the other side of the base portion (2).

Further, the stopper (19) is connected to the first guide bar (11) via a stopper elevating means provided near the second guide bar (11), near the support column (3), or near the first guide bar (10). When slidably provided on at least one of the guide bar (10) and the second guide bar (11), the entering objects such as various members constituting the stopper elevating means in the space passage (R) There is an advantage that the heat exchanger can be more smoothly passed from one side of the base section (2) to the other side through the guide path (2a) having a large space space without a space.

Therefore, by straightening the transfer path of the heat exchanger, a pipe expanding apparatus capable of constructing a suitable production line capable of increasing the transfer efficiency of the heat exchanger and improving the productivity of the heat exchanger. There is an advantage that it can be provided.

Further, when the stopper elevating means is a ball screw (20) screwed to the stopper (19), the ball screw (20) is connected to the second guide cover (11) or the column (3). Or the first guide bar (1
0) to be installed along the space passage (R) to prevent various members for moving the stopper (19) up and down from entering the space passage (R) to maximize the space capacity in the space passage (R). There is an advantage that it can be used as the guide path (2a) of the heat exchanger provided.

Further, when the second guide bar (11) is composed of a rail body provided on the column (3), an expensive cylindrical guide post is used for the second guide bar (11). Not only can the end plate (9) be moved smoothly in the vertical direction with the steady rest, but it is also cheaper than the guide post via the support column (3) with the same strength as the guide post. There is an advantage that it can be provided on the rail body to prevent the rail body from bending.

Further, at least one of the transfer body (23) and the base section (2) holds a heat exchanger, and the transfer body (23) goes from one side of the base section (2) to the other side. ) Is provided on the base part (2) at a pipe expandable position of the heat exchanger, heat is transferred from one side of the base part (2) to the other side. Even if the transport path of the heat exchanger is straightened so that it can pass through the exchanger and the heat exchangers are sequentially carried into the tube expansion device, the heat exchanger can be reliably installed regardless of the length of experience of the operator. Not only can it be stopped at a position where pipe expansion is possible to ensure reliable pipe expansion, but
There is an advantage that an automated heat exchanger manufacturing line can be constructed.

Further, at least one of the transfer body (23) and the base section (2) has a heat exchanger that goes from one side of the base section (2) to the other side through the transfer body (23). Even if a fixing device for positioning and fixing the heat exchanger at a position where it can be expanded is provided, the transport path of the heat exchanger is aligned in a straight line so that the heat exchanger can be passed from one side of the base (2) to the other side. However, even if the heat exchangers are sequentially loaded into the tube expansion device, it is possible to reliably stop the heat exchanger at the tube expandable position and reliably expand the tube regardless of the length of experience of the operator. Besides, there is an advantage that an automated heat exchanger production line can be constructed.

Further, at least one of the base part (2) and the transfer device is provided with a heat exchanger from one side of the base part (2) to the other side via the transfer device at a position where pipes can be expanded. Even when a fixing device for positioning and fixing is provided, the transport path of the heat exchanger is linearized and sequentially arranged so that the heat exchanger can pass through from one side of the base portion (2) to the other side. Even if the heat exchanger is carried into the tube expanding device, it is possible not only to reliably stop the heat exchanger at the tube expanding position but to perform reliable tube expansion regardless of the length of experience of the worker etc. There is an advantage that an automated heat exchanger manufacturing line can be constructed.

Further, at least one of the base part (2) and the transfer device is provided with a heat exchanger from one side of the base part (2) to the other side through the transfer device at a position where the pipe can be expanded. Even if a fixing device for fixing the movement of the transfer device is provided for positioning, transfer of the heat exchanger to enable passage through the heat exchanger from one side of the base portion (2) to the other side. Even if the heat exchangers are sequentially brought into the tube expansion device by straightening the route, regardless of the length of experience of the operator, etc., the heat exchanger should be reliably stopped at the tube expansion possible position to ensure reliable tube expansion. Not only that, but there is an advantage that an automated heat exchanger manufacturing line can be constructed.

[0029]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIG.

In the tube expanding device according to this embodiment, the base 2
A ceiling part 4 is laid across the upper ends of a pair of columns 3 standing upright from the rear left and right positions, and the device frame 1 is composed of the base part 2, the columns 3 and the ceiling part 4. .

Then, in the ceiling portion 4, a cylinder rod 5 which extends and retracts from the rear surface side of the ceiling portion 4 toward the base portion 2
A cylinder 5 with a is attached.

A rectangular actuating plate 6 is fixed to the tip of the cylinder rod 5a at its central portion, and the actuating plate 6 can be moved up and down through expansion and contraction of the cylinder rod 5a of the cylinder 5. .

A plurality of pipe expanding mandrels 7, ... Are hung vertically on the lower side of the operating plate 6, and the pipe expanding mandrel 7 can be moved up and down as the operating plate 6 moves up and down.

The pipe expanding mandrel 7 is formed of a rod body having a small diameter and a long length so as to match the pipe diameter and the pipe length of a heat exchanger (not shown) positioned on the base portion 2.
It is necessary to support it at an appropriate position so as to restrict the lateral bending during press fitting.

Therefore, at a position below the operating plate 6,
A plurality of guide plates 8 and an end plate 9 are disposed at the lowermost position, and the pipe expanding mandrel 7 is slidably inserted through the guide plates 8 and the end plate 9.

Further, the apparatus frame 1 is provided with a pair of first guide bars 10 at left and right positions on the front side.

The upper end of the first guide bar 10 is supported on the front side (corner portion) of the ceiling portion 4, and the lower end is supported on the front side (corner portion) of the base portion 2, It is a columnar guide post that vertically connects the base 2 and the ceiling 4.

Further, the apparatus frame 1 is provided with a pair of second guide bars 11 on the rear left and right positions.

The second guide bar 11 has a left end and a right end so that the upper end is close to the rear side (corner) of the ceiling 4 and the lower end is close to the rear side (corner) of the base 2. Prop 3
Is a rail body fixed to each of the columns along the vertical direction.

The operating plate 6 has the pair of first guide bars 10 inserted in the left and right positions on the front side, and
The pair of second guide bars 11 are inserted in the left and right positions on the rear side so that the guide bars 10 and 11 can be moved up and down while maintaining a horizontal state.

More specifically, the first guide bar 10 is inserted into the left and right positions on the front end side of the operation plate 6 so that the operation plate 6 can slide along the first guide bar 10. A first support portion 12 of
In addition, a pair of second support portions 13 that allow the operation plate 6 to slide along the pair of second guide bars 11 are provided at the left and right positions on the rear end side of the operation plate 6.

Incidentally, the first support portion 12 in the above embodiment.
Is used as a bracket, and the second support portion 13 is used as a slider.

As with the operating plate 6, the end plate 9 also has a pair of first guide bars 10 inserted in the front left and right positions and a pair of second guide bars in the rear left and right positions. By being slidably attached to 11, it can be raised and lowered while maintaining a horizontal state.

More specifically, the first guide bar 10 is inserted into the left and right positions of the front end surface of the end plate 9 so that the end plate 9 can slide along the first guide bar 10. A pair of first support portions 12 are provided, and a pair of second support portions 13 that slidably move the end plate 9 along the pair of second guide bars 11 are provided at the left and right positions on the rear end side. It is provided.

In the end plate 9 as well, a bracket is used for the first support portion 12 and a slider is used for the second support portion 13 in the embodiment. The point is that the first guide bar is used. 10 and second guide bar 1
Along the first guide bar 10 and the second guide plate 9, the operating plate 6 and the end plate 9 can be smoothly moved up and down while maintaining the horizontal state of the operating plate 6 and the end plate 9. Guide bar 1
It goes without saying that the specific structure and members used for the first support portion 12 and the second support portion 13 are not limited as long as they can be supported by 1.

The guide plate 8 disposed between the operating plate 6 and the end plate 9 is a pipe expanding mandrel 7.
It is a plate body in which a plurality of sheets are appropriately suspended according to the length of the sheet.

Since the guide plate 8 is for determining the maximum opening distance between the operating plate 6 and the end plate 9 by adjusting the number of the guide plates 8, the structure of the guide plate 8 is not necessarily the first and second guide bars 10. , 11, it is not necessary to engage the first support portion 12 and the second support portion 13, and therefore the first guide bar 10
Will be arranged at a position separated from the front side of each guide plate 8.

Further, elongated holes 8a, 8a are formed at the left and right positions of the respective guide plates 8, and the elongated holes 8 are formed.
The third guide bar 14 (rod-shaped guide post) and the first ball screw 15 are inserted into the a and 8a, respectively.

An upper end of the third guide bar 14 is slidably inserted into a hole vertically formed at the left and right positions of the operation plate 6, and a lower end thereof is held at the left and right positions of the end plate 9, It is arranged in parallel with one guide bar 10.

Further, a slider 16 having a half-divided shape is fitted into the elongated hole 8a of each guide plate 8 so as to come into contact with the approximately one-half arc surface of the third guide bar 14, and the slider 16 is attached to the first hole. By sliding along the third guide bar 14, each guide plate 8 can move up and down while maintaining the horizontal state.

An upper end of the first ball screw 15 is slidably inserted into a hole vertically formed at the left and right positions of the operation plate 6, and a lower end thereof is rotatably held at the left and right positions of the end plate 9. , And is arranged parallel to the third guide bar 14.

An upper stopper 17 is screwed onto each of the first ball screws 15.

The upper stopper 17 is formed with a half-divided portion which comes into contact with the approximately half-circle surface of the third guide bar 14, and is provided with a first driving member (not shown) such as a motor. When the one ball screw 15 rotates, the upper half stopper 17 slides along the third guide bar 14 and the upper stopper 17 is screwed vertically along the first ball screw 15.

The upper stopper 17 can pass through the elongated hole 8a formed in the guide plate 8 and come into contact with the back side of the operation plate 6.

The first ball screw 15 is arranged outside of the third guide bar 14 (however, the arrangement of the third guide bar 14 and the first ball screw 15 is reversed). Therefore, the slider 16 slides on the inner halved outer peripheral arc surface of the third guide bar 14, while the upper stopper 17 is provided on the upper side of the third guide bar 1.
The slider 16 and the upper stopper 17 do not interfere with each other by sliding on the outer half-circular arc surface of the outer periphery of No. 4.

As described above, the first guide bar 10 and the third guide bar 14 are inserted through the operating plate 6, the guide plate 8 and the end plate 9, and the operating plate 6, the guide plate 8 and the end plate are inserted. 9
Is the first guide bar 1 while maintaining a parallel relationship with each other.
It is movable up and down along the 0 and third guide bars 14.

A suspension bolt 18 is inserted into each of the operating plate 6, the guide plate 8 and the end plate 9 (the right side in the figure is not shown).
The plates 6, 8 and 9 are arranged without being removed by the retaining heads 18a provided at both ends of the, and depending on the number of the hanging bolts 18 and the guide plates 8,
The maximum opening distance between the working plate 6 and the end plate 9 is determined.

Between the base part 2 and the end plate 9, the end plate 9 is lowered by abutting on the back surface side of the end plate 9 descending together with the operating plate 6 descending via the cylinder 5. A plate-like lower stopper 19 (reference base) that regulates (stops) is provided.

Similar to the end plate 9, the stopper 19 has a pair of first guide bars 10 inserted at the front left and right positions and a pair of second guide bars 11 at the rear left and right positions. By being slidably attached, it is possible to move up and down while maintaining the horizontal state.

More specifically, the first guide bar 10 is inserted into the left and right positions of the front end surface of the stopper 19 so that the stopper 19 can slide along the first guide bar 10. A first support portion 12 is provided, and a pair of second support portions 13 that slidably move the second guide bar 11 along the pair of second guide bars 11 at the left and right positions on the rear end side. Is provided.

A second ball screw 20 for raising and lowering the stopper 19 is provided on the rear side of the stopper 19.
Are arranged.

The upper end of the second ball screw 20 is rotatably held by a pair of holding portions 21 provided on the inner wall surfaces of the columns 3 that do not face each other, and the lower end is on the rear side of the base portion 2. Is rotatably held at the left and right positions of the first guide bar 10 and is arranged parallel to the first guide bar 10.

The left and right positions on the rear side of the stopper 19 are screwed to the pair of second ball screws 20.

More specifically, a pair of female screws 22 into which the second ball screw 20 is threadedly inserted are provided at the left and right positions on the rear side of the stopper 19, and a drive device (not shown) such as a motor is installed. When the second ball screw 20 rotates through the stopper 19, the stopper 19 moves to the first and second guide bars 1.
It is possible to move up and down along 0 and 11 while maintaining a horizontal state in the vertical direction.

Further, in the base portion 2, the guide path 2a of the transfer body 24 holding and carrying the heat exchanger is provided so that heat is transferred from one side of the base portion 2 to the other side (arrow P). It is provided within the distance between the first guide bar 10 and the second guide bar 11 so that it can pass through the exchanger.

Further, the base portion 2 is provided with a transfer body 23 which holds a heat exchanger and which is directed from one side of the base portion 2, that is, one side of the tube expanding device to the other side. A fixing device 24 for positioning and fixing to the base portion 2 at the pipe expandable position is provided.

In the operation mode of the tube expanding device having such a structure, first, the second ball screw 20 is rotated in accordance with the height dimension of the heat exchanger to position the stopper 19 at a desired height position.

At this time, the first ball screw 15 is rotated according to the height of the heat exchanger to position the upper stopper 17 at a desired position.

According to the tube expanding device having the above structure,
Between the end plates 9 located on both sides (horizontal direction) of the tube expanding device and the base portion 2, the heat exchanger is carried in from one side (lateral direction) of the tube expanding device and the other side (other side). side)
A space passage R for carrying out the heat exchanger is provided within the distance between the first guide bar 10 and the second guide bar 11, and the transfer body 23 for carrying the heat exchanger is utilized in the space passage. Is provided within the distance between the first guide bar 10 and the second guide bar 11 so that the guide passage 2a can pass through the heat exchanger from one side to the other side of the base portion 2. Has been.

Further, a transfer body 23, which holds the heat exchanger and goes from one side to the other side of the base section 2 through the guide path 2a, is installed in the base section 2 at a position where the heat exchanger can be expanded. A fixing device 24 for positioning and fixing the base 2 is provided.

Therefore, in the case where the transport path of the heat exchanger is linearized so that it can pass through the heat exchanger from one side to the other side of the base unit 2 and the heat exchangers are sequentially carried into the tube expanding device. However, regardless of the number of years of experience of workers, etc., not only can the heat exchanger be reliably stopped at the position where it can be expanded to ensure reliable expansion, but also the manufacture of automated heat exchangers. There is an advantage that the line can be constructed.

Next, the transfer body 2 holding the heat exchanger through the fixing device 24 and moving from one side of the base 2 to the other side.
When 3 is positioned and fixed to the base 2 at the pipe expandable position of the heat exchanger and the cylinder 5 is operated, the operation plate 6, the guide plate 8 and the end plate 9 are moved along with the extension of the cylinder rod 5a. It will descend while keeping the distance from each other.

That is, the end plate 9 comes into contact with the stopper 19 so that its lowering is regulated, and then the guide plate 8 comes into contact with the end plate 9 which is restrained and its lowering is regulated.

During this time, the pipe expanding mandrel 7 is press-fitted into the pipe of the heat exchanger, and the radiation fin and the pipe are integrated, but the tip of the pipe expanding mandrel 7 (pipe expanding billet) exchanges heat. When reaching the vicinity of the lower end of the container, the operating plate 6 comes into contact with the upper stopper 17 and its lowering is restricted.

At this stage, the work is completed, this time the cylinder rod 5a is retracted, and the pipe expanding mandrel 7 is pulled out from the pipe of the heat exchanger.

After that, the completed heat exchanger has the transfer body 2
It will be carried out from the base part 2 through 3 (arrow P).

Therefore, according to the pipe expanding apparatus of this embodiment, the heat exchanger is provided so that it can pass through the heat exchanger (arrow P) from one side of the base 2 to the other. An advantage is that it is possible to provide a tube expanding device that can construct a suitable production line that can straighten the transfer path (arrow P) and thus improve the transfer efficiency and improve the productivity of the heat exchanger. is there.

In the above embodiment, the transfer of the heat exchanger to the base 2 using the space passage R formed within the distance between the first guide bar 10 and the second guide bar 11. Although the guide path 2a of the body 23 is provided, the heat exchanger does not necessarily have to be held by the transfer body 24 and pass through from one side of the base 2 to the other side. A guide path 2a for installing on the base 2 a transfer device (not shown) that is formed from various conveyors or the like to transfer the heat exchanger to the base 2 and is formed separately from the tube expanding device. It is also possible that the heat exchanger can be passed from one side of the base 2 to the other by providing the base 2 with a guide path 2a for directly incorporating a transporting device of various structures. Guides to the base portion 2 of the transfer body 23 that carries the heat exchanger, At least one of the guide paths 2a for stationary installation can pass through the heat exchanger from one side to the other side of the base portion 2 so as to pass through the heat exchanger. It only has to be provided within the distance from the bar 11.

In the above embodiment, the upper end of the second ball screw 20 is rotatably held by the pair of holding portions 21 provided on the inner wall surfaces of the columns 3 facing each other, and the lower end thereof is the base. The second ball screw 20 is rotatably held in the left and right positions on the rear side of the portion 2 and is arranged in parallel with the first guide bar 10, but the second ball screw 20 is It may be located on the front side of the second guide bar 11 (between the first guide bar 10 and the second guide bar 11) (not shown), and in this case as well, It is possible to provide at least one of the guide path 2a of the transfer body 23 for carrying the heat exchanger and the guide path 2a for installation of the transfer device (not shown) within the distance from the guide bar 11 of the base. Heat exchange from one side of Part 2 to the other Although there is an advantage that it can be passed through the vessel, in this case, the width dimension in the front-rear direction of the tube expanding device is slightly increased by the attachment dimension of the second ball screw 20 located on the front side of the second guide bar 11. It goes without saying that inconvenience will occur.

Further, in the above embodiment, when the second guide bar 11 is composed of the rail body provided on the support column 3, an expensive cylindrical guide post is used for the second guide bar 11. Not only can the end plate 9 be smoothly moved in the vertical direction with the steady rest, but also the rail body, which is cheaper than the guide post, can be equipped with the support post 3 having the same strength as the guide post. Although there is an advantage that the bending of the rail body can be prevented, the second guide bar 11 is not always necessary.
Need not be a rail body, but may be a cylindrical guide post similar to the first guide bar 10.

Furthermore, in the above embodiment, the second ball screw 20 is rotatably held at its upper end by a pair of holding portions 21 provided on the inner wall surfaces of the columns 3 which do not face each other, and the lower end is the base. The first guide bar 10 is rotatably held at the left and right positions on the rear side of the base 2.
However, in this case, it is possible to prevent the second guide bar 11 and the second ball screw 20 from being arranged side by side in the front-rear direction of the pipe expanding device, and thus the pipe expanding device. There is an advantage that the width dimension in the front-rear direction can be made as compact as necessary.

Further, in the above embodiment, the transfer body 23 is mounted on the base 2 at a position where the heat exchanger can be expanded.
Although the fixing device 24 for positioning and fixing is provided on the transfer body 23, the fixing device 24 may be provided on the transfer body 23.

Further, the fixing device 24 may have a structure in which the heat exchanger that goes from one side to the other side of the base portion 2 via the transfer body 23 is positioned and fixed at a position where pipe expansion is possible, and in any case. Even if there is, when the heat exchanger is conveyed into the tube expanding device sequentially by straightening the heat exchanger transport path so that it can pass through the heat exchanger from one side to the other side of the base unit 2. In addition to not only being able to reliably stop the heat exchanger at the position where it can be expanded to ensure reliable expansion irrespective of the length of experience of the operator, etc., we also have an automated heat exchanger production line. It has the advantage that it can be built.

Further, the fixing device 24 provided on at least one of the base part 2 and the transfer device can expand the heat exchanger extending from one side of the base part 2 to the other side via the transfer device. When positioning and fixing at a position or fixing the movement of the transfer device, the transfer path of the heat exchanger is set so that it can pass through the heat exchanger from one side of the base part 2 to the other side. Even if the heat exchangers are straightened and carried into the tube expanding device in sequence, the heat exchanger is surely stopped at the tube expandable position and reliable tube expansion is performed regardless of the length of experience of the operator, etc. Not only that, but there is an advantage that an automated heat exchanger manufacturing line can be constructed.

The present invention is not limited to the above embodiment, and various design changes can be made without departing from the gist of the present invention.

For example, the first support portion 12 and the second support portion 13
Is an operating plate 6, an end plate 9 and a stopper 1.
9 may be integrally provided, or a separate support portion may be attached.

Further, although brackets and sliders are used for the first supporting portion 12 and the second supporting portion 13, it goes without saying that such a specific structure is not limited in any way.

The diameter, length, shape and quantity of the pipe expanding mandrel 7, the quantity of guide plates 8, the quantity of cylinders 5, the shape of the upper stopper 17 and the shape of the half bearing (slider) 16 are also limited. Not a thing.

Further, although columnar guide posts are used for the first guide bar 10 and the third guide bar 14, it goes without saying that they are not necessarily limited to columnar shapes.

Further, in the above embodiment, the ball screw 20 is used for the stopper elevating means, but the stopper screw is not necessarily limited to the ball screw 20, and may have a hydraulic cylinder, an electric motor, and various other structures. Needless to say, the specific power and structure of the stopper elevating means is not limited at all as long as the stopper 19 can be moved up and down.

In the above embodiment, the pipe expanding device is a so-called vertical pipe expanding device, but the pipe expanding device is not necessarily limited to the vertical pipe expanding device, and a horizontal pipe expanding device may be used as long as the pipe expanding device has the same structure. Needless to say, also belongs to the scope of the present invention.

[0092]

According to the pipe expanding apparatus of the present invention, a pair of first guide bars are provided at the left and right positions on the front side of the end plate and the left and right positions on the rear side of the end plate between the base and the ceiling. A pair of second guide bars are provided separately from each other, and at least one of the front side and the rear side of the end plate is provided on at least one of the first guide bar and the second guide bar. The first guide bar or the second guide is slidably mounted, and the stopper is provided via stopper elevating means provided near the second guide bar or near the support or near the first guide bar. At least one of the bars is slidably provided, and the base is provided with at least one of a guide path for a transfer body carrying a heat exchanger or a guide path for installing a transfer device. One of them is provided within the distance between the first guide bar and the second guide bar so as to be able to pass through the heat exchanger from one side of the base part side to the other side. .

Therefore, while moving the end plate in the up-and-down direction with the steady rest, the side of the pipe expanding device is located between the end plate and the base part located on both sides (left and right direction) of the pipe expanding device. Provide a space passage for loading the heat exchanger from one side (left-right direction) and unloading the heat exchanger from the other side (other side) within the distance between the first guide bar and the second guide bar. Can be done.

Therefore, it is possible to provide at least one of the guide passage of the transfer body carrying the heat exchanger and the guide passage for installing the transfer device in the base portion by utilizing the space passage. By making it possible to pass through the heat exchanger from one side to the other side of the part, the transfer path of the heat exchanger can be aligned, which in turn increases the transfer efficiency and improves the productivity of the heat exchanger. The present invention has an effect of being able to provide a pipe expanding device capable of constructing a suitable production line.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a tube expanding device according to an embodiment of the present invention.

FIG. 2 is an overall perspective view of a conventional tube expanding device.

[Explanation of Codes] 1 ... Device frame, 2 ... Base part, 3 ... Struts 4 ... Ceiling part, 5 ... Cylinder, 5a ... Cylinder rod 6, Actuating plate, 7 ... Expansion mandrel, 8 ... Guide plate 8a ... Long Hole, 9 ... End plate, 10 ... First guide bar 11 ... Second guide bar, 12 ... First support portion, 13 ...
2nd support part 14 ... 3rd guide bar, 15 ... 1st ball screw, 1
6 ... Slider 17 ... Upper stopper, 18 ... Hanging bolt, 18a ...
Head portion 19 ... Stopper, 20 ... Second ball screw, 21 ... Holding portion 22 ... Female screw, 23 ... Transfer body, 24 ... Fixing device

Claims (7)

[Claims] 1. A device frame (1) is formed by opposing base parts (2), ceiling parts (4) and columns (3) connecting the respective rear sides, and the base parts (2) and An operating plate (6) having a plurality of pipe expanding mandrels (7) between it and the ceiling part (4) so as to be able to move up and down, and is suspended and supported at a position below the operating plate (6) and In the tube expanding device provided with an end plate (9) whose descent is restricted by contacting a stopper (19) positioned in accordance with the height position of the heat exchanger set on the stand (2), Between the base portion (2) and the ceiling portion (4), a pair of first guide bars (10) and a rear side of the end plate (9) are provided at left and right positions on the front side of the end plate (9). A pair of second guide bars (11) are provided separately at the left and right positions. At least one of the front side and the rear side of the end plate (9) is the first guide bar (10) or the second guide bar (1).
1) is slidably attached to at least one of the above, and the stopper (19) is provided near the second guide bar (11), near the column (3), or near the first guide bar (10). It is slidably provided on at least one of the first guide bar (10) and the second guide bar (11) via a stopper elevating means provided, and the base part (2) is At least one of the guide path (2a) of the transfer body (23) carrying the heat exchanger and the guide path (2a) for installing the transfer device is
Provided within the distance between the first guide bar (10) and the second guide bar (11) so that the heat exchanger can pass through from one side of the base portion (2) to the other side. A pipe expanding device characterized by being formed. 2. The tube expanding device according to claim 1, wherein the stopper elevating means is a ball screw (20) screwed to the stopper (19). 3. The tube expanding device according to claim 1, wherein the second guide bar (11) is a rail body provided on a column (3). 4. A transfer body that holds a heat exchanger in at least one of the transfer body (23) and the base section (2) and goes from one side of the base section (2) to the other side. (23)
The pipe expanding apparatus according to any one of claims 1 to 3, further comprising a fixing device for positioning and fixing the heat exchanger to the base portion (2) at a pipe expandable position of the heat exchanger. 5. At least one of the transfer body (23) and the base section (2) is heated from one side of the base section (2) to the other side through the transfer body (23). The tube expanding apparatus according to claim 1, further comprising a fixing device that positions and fixes the exchanger at a position where the tube can be expanded. 6. The base section (2) is provided to at least one of the base section (2) and the transfer apparatus via the transfer apparatus.
4. The pipe expanding apparatus according to claim 1, further comprising a fixing device for positioning and fixing the heat exchanger from one side to the other side at a position where the pipe can be expanded. 7. A base section (2) is provided to at least one of the base section (2) and the transfer apparatus via the transfer apparatus.
4. A fixing device for fixing the movement of the transfer device so as to position the heat exchanger from one side to the other side at a pipe expandable position. Expansion device.