JP2558214B2 - Bending filling dolly - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trolley used for injecting a filler of a low melting point material used for bending a metal pipe into a straight tubular work before bending.

[0002]

2. Description of the Related Art When bending multiple pipes, in order to accurately bend the inner and outer pipes, a filler of a low melting point substance is injected into a straight tubular work before bending. The straight tubular work is supported by the carriage. This cart may be provided with a nozzle for fitting the upper end of the straight tubular work to inject the filler and a seal member fitted to the lower end of the straight tubular work.

[0003]

By the way, since the nozzle and the seal member are exclusively used for each specification regarding the length and the inner and outer diameters of the straight tubular work, when the specification of the straight tubular work is changed. It was inconvenient to recreate the trolley each time. Therefore, it is desirable to be able to deal with the specification change of the straight tubular work with the smallest possible change. Furthermore, it is desired to improve work efficiency. The invention of the present application is aimed at satisfying such a demand.

[0004]

In order to solve the above problems, a bending filler filling truck according to the present application is a truck for supporting a straight tubular work before bending and injecting the filling agent. The trolley body, an injection pallet disposed above the pallet body, and a sealing pallet disposed below the trolley body, and the trolley body includes a slide deck that moves up and down while vertically supporting a straight tubular work. , The injection pallet is in the shape of a container opened upward to accommodate the molten filler, is attached around the through hole provided in the bottom and protrudes downward, and the upper end of the straight tubular work when moving upward. Equipped with a nozzle having an inner diameter approximately equal to its outer diameter, the sealing pallet is vertically movable, and an outer diameter approximately equal to its inner diameter for fitting to the lower end of a straight tubular work during upward movement. Characterized in that it comprises a sealing member. The carriage main body may support a plurality of straight tubular works, and the nozzle of the injection pallet and the sealing member of the sealing pallet may be provided so as to correspond to the plurality of straight tubular works.

[0005]

[Operation] When the straight tubular work is supported vertically on the slide deck of the trolley body, the sealing pallet is moved upward to fit the sealing member to the lower end of the straight tubular work, and when the slide deck is moved upward in this state. The upper end of the straight tubular work fits into the nozzle of the injection pallet. Therefore, the filler in the injection pallet is injected into the straight tubular work from the through hole at the bottom through the nozzle, and then the slide deck is lowered to remove the straight tubular work. Further, when the specifications of the straight tubular work are changed, the nozzle and the seal member are changed.

If a plurality of straight tubular works are supported on the carriage main body and a nozzle of the injection pallet and a sealing member of the sealing pallet are provided corresponding to the plurality of straight tubular works respectively, a large number of straight tubular works can be formed at one time. Filler can be injected.

[0007]

EFFECT OF THE INVENTION The trolley has a trolley main body, an injection pallet and a sealing pallet divided into three parts, and a trolley main body is provided with a slide deck that moves up and down while supporting a straight tubular work. Since the pallet is equipped with a seal member so that it can be moved up and down, if the specifications of the straight tubular work are changed, it is only necessary to change the nozzle and seal member without changing the trolley body, and the changed parts are possible. Since it is possible to reduce the cost, it is possible to save the cost, and it is not necessary to store many kinds of trolleys, so the storage space for that purpose can be reduced. Besides,
If it is possible to inject the filler into a large number of straight tubular works at once, the working efficiency is significantly improved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described below with reference to the drawings.
FIG. 1 is a diagram for explaining in principle a bending process of an exhaust pipe for a motorcycle according to the present embodiment. First, a straight pipe work 1 of a metal double pipe made of an inner and outer cylinder by welding. Is formed and is put into the injection furnace 3 which is the lower stage of the injection and discharge furnace 2.

The upper stage of the injecting and discharging furnace 2 is a discharging furnace 4, which is filled with a filler made of a low melting point substance discharged from a storage portion 5 formed on this floor between the inner and outer cylinders of the straight tubular work 1. It is taken out of the injection furnace 3 and is bent. At this time, due to the presence of the filler, each bending process of the inner and outer cylinders is performed accurately.

Subsequently, the bent tubular work 6 after bending is put into the discharge furnace 4, and when this is heated, the filler is melted and discharged and stored in the storage section 5. The curved tubular work 6 from which the filler has been discharged is taken out of the discharge furnace 4 and moves to another subsequent process.

FIG. 2 is a schematic side sectional view of the injection and discharge furnace 2, FIG.
FIG. 3 is a cross-sectional view showing only the injecting and discharging furnace 2 part and the carriage inside thereof from the front side (the direction of arrow A in FIG. 2). In these drawings, the inside of the injection and discharge furnace 2 is vertically divided by a floor 7 of the discharge furnace 4 which also serves as a partition wall, and a storage part 5 is formed at two central portions in the left and right direction (see FIG. 3) and a bottom part 8 thereof is formed. Is the injection furnace 3
It is configured as an inclined surface that projects inward, a valve 9 is provided at the lowest portion, and it is opened and closed by an appropriate means from the outside.

On the floor 7 of the discharge furnace 4, a discharge carriage 10 that supports the curved tubular work 6 is placed, and on the floor 11 of the injection furnace 3, a filling carriage 12 that supports the straight tubular work 1 is placed. Two of these carts are placed in the left-right direction. In addition, the workbench 1 on the second floor that has risen from the floor 11 of the injection furnace 3
The floor of 3 is the same height as the floor 7 of the discharge furnace 4, and the workbench 1
The entrance and exit of the discharge furnace 4 facing 3 is opened and closed by a door 14 that moves up and down. On the other hand, the inlet and outlet of the injection furnace 3 are on the opposite side,
It is opened and closed by a double door type door 15.

The hot-air circulation device comprises a duct 16, an axial fan 17 and a duct heater 18 provided in the top portion of the injection / exhaust furnace 2, and the axial fan 17 is rotated by a motor 19. The duct 16 is a suction duct 2 communicating with each other.
0, an exhaust duct 21 and a supply duct 22 are provided.

The suction duct 20 is opened in the upper part of the discharge furnace 4, and the exhaust duct 21 is opened to the atmosphere so as to discharge the hot air sent from the axial fan 17 into the atmosphere, and is opened and closed by the valve 23. The opening and closing of the valve 23 is interlocked with the opening and closing of the doors 14 and 15, and after the filling and discharging of the filler and before opening these doors 14 and 15, the exhaust duct 21 is opened to the atmosphere, so that the temperature inside the discharge furnace 4 in particular is controlled. Care is taken to prevent the hot air from being blown toward the worker when the door 14 is opened rapidly when the door 14 is opened. In addition, the door 14 for injecting and discharging the filler,
When the valve 15 is closed, the valve 23 is closed.

The supply duct 22 extends in the vertical direction in the injection and discharge furnace 2, supplies most of the hot air into the discharge furnace 4 from a supply port 24 that opens to the lower part of the discharge furnace 4, and fills the remaining part in the injection furnace 4. 3 is supplied into the injection furnace 3 from a supply port 25 opening to the upper part.

The inside of the discharge furnace 4 is heated to about 150 ° C., which is higher than the melting point of the filler, by the hot air from the supply port 24, and the inside of the injection furnace 3 is adjusted to about 60 ° C. The hot air that has entered the discharge furnace 4 from the supply port 24 heats the curved tubular work 6 of the discharge carriage 10 and returns to the suction duct 20, and the hot air that has entered the injection furnace 3 from the supply port 25 is the floor 7 of the discharge furnace 4. Return to the suction duct 20 through the communication port 26 formed in
After that, it is heated again by the duct heater 18 and injected and discharged into the furnace 2.
Is circulated in.

Next, details of the filling carriage 12 will be described with reference to FIGS. 4 to 10. FIG. 4 is a view showing a cross section of the filling carriage 12 supporting the straight tubular work 1 from the front direction (direction shown by the arrow A in FIG. 2), and the filling carriage 12 includes the injection pallet 30 and the carriage. The main body 31 and the sealing pallet 32 have a three-divided structure, and the sealing pallet 32 is vertically movable by a lifter (not shown) such as a hydraulic device.

FIG. 5 is a plan view of the filling cart 12 immediately before injection, and FIG. 6 is a side view showing the straight tubular work 1 in the left half before setting and in the right half the cross section after setting. FIG. 7, FIG. 7 is a cross-sectional view taken along the line CC of FIG. 4, FIG. 8 is a cross-sectional view taken along the line D-D of FIG. 6, and FIGS. 9 and 10 are straight tubular workpieces in the state shown on the right side of FIG. 2 is an enlarged cross-sectional view of the upper and lower end portions of FIG.

As is apparent from these figures, the carriage main body 3
1, a large number of straight tubular works 1 are arranged in the left-right direction and are supported in two rows in the front-rear direction. This support is performed by detachably fitting the intermediate portion of the straight tubular work 1 to a substantially C-shaped support ring 34 having a shape in which a part of the circumference is cut out as shown in FIG. 7.

The support rings 34 are arranged in two rows in the front-rear direction corresponding to each straight tubular work 1, and a large number of each row are arranged in the left-right direction. Supported, cross member 35
The left and right ends of the are attached to the central portions of the reinforcing members 37 that are passed between the front and rear frame members 36. In FIG. 7, the straight tubular work 1 fitted to the support ring 34 is omitted.

A slide deck 38 to which the lower end of the straight tubular work 1 is fitted is provided at the lower part of the carriage main body 31, and is supported between the frame members 36 so as to be vertically movable via guides 39 at the four corners, and is not shown. Sealing pallet 32 by lifter
When it is moved up together with the sealing pallet 32, a pipe-shaped stopper 40 is inserted in the front-rear direction (see FIG. 5,
6), the both ends are respectively passed through the brackets 42 provided at the corresponding positions of the front and rear lower left and right frame members 41 in advance to prevent the lowering.

As is apparent in FIG. 6, the injection pallet 30
Is a container-shaped receiving portion 44 that projects downward between the upper left and right frame members 43 and has an open upper portion, and a flange portion 45 formed around the upper end portion thereof rides on the upper surface of the upper left and right frame member 43. Here, a stopper 46 similar to the stopper 40 (FIG. 6) is passed in the left-right direction, and the through hole 4 formed in the edge portion 47 rising upward from each upper end portion of the upper left-right frame member 43.
It is fixed by passing it through 8 (FIG. 4).

A guide pin 51, which is detachably supported by a bracket 50 with a bolt 49, is provided in the receiving portion 44 at a position corresponding to each straight tubular work 1, and the lower end portion of the guide pin 51 is the bottom portion of the receiving portion 44. And extends downwards, and the periphery is covered with a pipe-shaped nozzle 52 concentrically attached to the bottom of the receiving portion 44.

As is apparent from FIG. 9, the inner diameter of the nozzle 52 is substantially equal to the outer diameter of the upper end of the outer cylinder 53 of the straight tubular work 1 having the inner and outer double cylinder structure, and the outer diameter of the guide pin 51 is the outer cylinder 53. It is substantially equal to the inner diameter of the upper end portion of the inner cylinder 54 extending longer than that. Therefore, when the slide deck 38 moves upward, the outer cylinder 53 and the inner cylinder 54 are closely fitted between the guide pin 51 and the nozzle 52 at the upper end of the straight tubular work 1.

At this time, as clearly shown in FIG.
The upper end of 4 has a different diameter, and a gap 55 is formed between the outer cylinder 53 and the inner cylinder 54. As apparent from FIG. 9, a through hole 57 is formed in the bottom portion 56 of the receiving portion 44, and the through hole 57, the nozzle 52, and the gap 55 shown in FIG.
Through the space between the outer cylinder 53 and the inner cylinder 54, and the receiving portion 44.
It is designed to communicate with the inside of the. This through hole 57
Has a hole diameter which penetrates the guide pin 51 and is larger than the outer diameter thereof, and the nozzle 52 has a bolt 58 for the bottom portion 5.
It is detachably attached to 6.

On the other hand, the lower end of the straight tubular work 1 is shown in FIG.
As shown in FIG. 5, the outer cylinder 53 and the inner cylinder 54 are in close contact with each other, and the seal member 6 made of a heat-resistant elastic material such as silicon rubber is placed inside the inner cylinder 54 so as to close the water drain hole provided in the inner cylinder 54.
The zeros are closely fitted. In addition, in order to fit the lower end portion of the straight tubular work 1 to the upper panel 61 of the slide deck 38, the ring 63 is fitted and fixed in the through hole 62 formed in advance, and the stopper ring 64 is fitted. .

Further, the seal member 60 is detachably attached to the sealing pallet 32 with the base portion 65 by bolts 66. As is apparent from FIGS. 4 and 6, a pin 67 for positioning is provided at the center of both ends of the sealing pallet 32 in the left-right direction.
Project upward and the sealing pallet 32 moves upward, it fits into the hole 68 (FIG. 6) formed in the corresponding position of the slide deck 38.

The carriage main body 30 can support a plurality of types of straight tubular works 1 having different specifications such as inner and outer diameters and lengths. When the specification of the straight tubular work 1 is changed, the nozzle 5
2 and the seal member 60 or by changing the guide pin 51 together with these.

11 and 12 are a side sectional view and a front view, respectively, of the discharge cart 10. As shown in FIG. 11, a pair of intermediate frame members 71 are provided between the front and rear frame members 70 on the left and right sides, and Between the intermediate frame members 71 of the support plates 72 and 7
3, and support rings 74 and 75 similar to the support ring 34 (FIG. 7) are provided on each.

The support plate 72 has its front end side extending upward, and the support plate 73 has its front end side extending forward or rearward, so that the support plates 72 and 73 are opened by approximately 90 °. Therefore, when the curved tubular work 6 is attached to the support rings 74 and 75, the end portion where the inner and outer cylinders are sealed and a portion curved in the vicinity of the same by 90 ° are supported, and the end portion where the inner and outer cylinders are opened (filler The injection-side end of is supported downward. The curved tubular works 6 supported in this manner are made to face each other in two rows in the front-rear direction, and a plurality of them are arranged in the left-right direction as shown in FIG.

Reference numeral 76 in the drawing denotes a spare bracket, which can be attached with a supporting plate 73 formed in another suitable shape when the curved tubular work 6 has a different shape. Further, reference numeral 77 is a pin for locking an engaging member provided at the tip of a lifting chain or the like when lifting and transporting the discharge cart 10.

Next, the operation of this embodiment will be described. 2 and 3, in a state where the discharge carriage 10 is placed on the floor 7 of the discharge furnace 4 and the filling carriage 12 is placed on the floor 11 of the injection furnace 3,
When the doors 14 and 15 are closed and hot air is sent into the injecting and discharging furnace 2 by the hot air circulating device, the inside of the discharging furnace 4 is heated to about 150 ° C. which is higher than the melting point of the filler, and the curved tubular work 6 of the discharging carriage 10 is heated. The filled filler is melted and discharged and accumulated in the reservoir 5 because the open portion of the curved tubular work 6 faces downward (see FIG. 11). At the same time, the inside of the injection furnace 3 is about
It is kept warm at about 0 ° C.

Then, when the valve 9 is opened, the filling material in the storage portion 5 is discharged toward the filling carriage 12 located in the lower filling furnace 3 and is stored in the receiving portion 44 of the filling pallet 30. Further, from here, through the through hole 57, each nozzle 5
It is injected into the space between the outer cylinder 53 and the inner cylinder 54 through the gap 55 (see FIG. 8) from the upper end of each straight tubular work 1 fitted inside 2.

When the length or inner / outer diameter of the straight tubular work 1 is changed, the nozzle 52 and the seal member 60 or the guide pin 51 together with these can be changed without changing the carriage main body 30. . Therefore,
The change of the filling cart 12 associated with the change of the specifications of the straight tubular work 1 need only be as small as possible, and it is not necessary to prepare a large number of dedicated filling carts 12 for each specification of the straight tubular work 1. Therefore, the trolley cost and storage space can be saved.

Moreover, since a large number of straight tubular works 1 and curved tubular works 6 are supported on one carriage 10 and 12 and two carriages 10 and 12 are respectively put into the injection and discharge furnace 2 at a time, Extremely high efficiency.

Further, since the carriage body is not provided with a seal member, the seal member will not be damaged by heat even if a high-temperature straight tubular work immediately after welding is supported.

In addition, since the injection furnace 3 and the discharge furnace 4 are vertically arranged by using one injection and discharge furnace 2 in three dimensions, the filler can be melted and discharged and injected at the same time, and the conventional discharge liquid heat insulation tank can be used. Is unnecessary, and the structure of the equipment can be simple and compact,
The degree of freedom in equipment layout is increased, and work efficiency is further improved.

Furthermore, since the hot air is circulated into the discharge furnace 4 by the hot air circulation device, the heat can be effectively used and the temperature can be quickly raised during heating. Further, since the inside of the injection furnace 3 is kept warm by using a part of the hot air of the discharge furnace 4, it is possible to save heat keeping energy.

The present invention is not limited to the above-described embodiment and can be applied in various ways. For example, the work may be a multi-layered pipe having three or more layers, and conversely may not necessarily be a multi-layered pipe.

[Brief description of drawings]

FIG. 1 is a diagram showing in principle a bending process according to an embodiment.

FIG. 2 is a side sectional view of the device according to the embodiment.

FIG. 3 is a sectional view of an essential part of the device according to the embodiment.

FIG. 4 is a cross-sectional view of a main part of the filling cart according to the embodiment.

FIG. 5 is a plan view of the filling cart.

FIG. 6 is a side sectional view of the filling cart.

FIG. 7 is a cross-sectional view of main parts taken along the line CC of FIG.

FIG. 8 is an enlarged cross-sectional view of the main part taken along the line DD of FIG.

FIG. 9 is a partially enlarged cross-sectional view of the essential parts of the embodiment.

FIG. 10 is a partially enlarged cross-sectional view of the essential parts of the embodiment.

FIG. 11 is a side sectional view of the discharge cart according to the embodiment.

FIG. 12 is a front view of the same.

[Explanation of symbols]

1: straight tubular work, 2: injection and discharge furnace, 3: injection furnace, 4:
Exhaust furnace, 5: Reservoir, 6: Curved tubular work, 7: Floor, 9:
Valves: 10: discharge dolly, 12: filling dolly, 30: injection pallet, 31: dolly body, 32: sealing pallet, 38: slide deck, 44: receiving part, 52: nozzle, 60: sealing member

Claims (2)

(57) [Claims] 1. A trolley for supporting a straight tubular work before bending and injecting a filler, the trolley main body, an injection pallet arranged at an upper part thereof, and a sealing arranged at a lower part. Along with the pallet, the trolley body is provided with a slide deck that moves up and down while vertically supporting the straight tubular work, and the injection pallet is in the form of a container opened upward to accommodate the molten filler, It is equipped with a nozzle that is attached to the periphery of a through hole provided in the bottom and projects downward, and has an inner diameter that is approximately equal to the outer diameter of the nozzle to fit the upper end of a straight tubular workpiece when moving upward, and the sealing pallet can move up and down. And a trolley for filling the bending filler, which is equipped with a sealing member having an outer diameter substantially equal to the inner diameter of the straight tubular work when fitted to the lower end portion of the straight tubular work when it is moved upward. 2. The trolley body supports a plurality of straight tubular works, and the nozzle of the injection pallet and the sealing member of the sealing pallet are provided so as to correspond to the plurality of straight tubular works, respectively. Dolly for filling bending material.