JP3053739B2 - Casting tube drawing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for drawing a cast pipe from a casting machine capable of centrifugally casting the pipe around a horizontal axis.

[0002]

2. Description of the Related Art As this kind of drawing device, there has been known a drawing device provided with a clamping device capable of clamping an inner surface of a pipe to be drawn. At the time of drawing, the tube is gradually drawn from the casting machine by inserting the clamp device into the tube cast in the casting machine and running the drawing cart while clamping the inner surface thereof. When the drawing of the tube from the casting machine is completed, the drawing cart travels further and moves the tube to an unloading position for unloading the tube to the outside.

[0003]

However, if the clamping device cannot clamp the tube properly and a slippage occurs between the clamping device and the tube when the truck starts running, the tube can be successfully clamped. There is a problem that it cannot be pulled out. If a similar slippage occurs when the truck travels, even if the pulling cart travels to a predetermined position, the pipe does not follow it, and the pipe cannot reach the predetermined unloading position. Then, there is a problem that the pipe cannot be appropriately carried out.

[0004] Therefore, an object of the present invention is to solve such a problem and to detect the occurrence of a slip between such a clamp device and a pipe so as to appropriately cope with the slip.

[0005]

In order to achieve the above object, the present invention provides a clamp device for clamping an inner surface of a tube to be withdrawn, and a tube to which the clamp device is attached and which is clamped by the clamp device. a carriage traveling to a predetermined position as withdrawn from the casting machine, this
And a distance between the trolley and the clamped tube is detected. If the distance exceeds a predetermined value, this is detected and a slip between the clamp device and the tube is generated. And means for detecting

[0006]

SUMMARY OF According to this structure, when the slip between the clamping device and the pipe occurs, the distance between the bogie and the tube increases accordingly, it is provided in the carriage that
The occurrence of the slip is detected by being detected by the detecting means. In that case, the clamp by the clamp device may be temporarily released, and the carriage may be approached toward the pipe so that the above-mentioned distance is within a predetermined value, and then clamped again.

[0007]

1 and 2, a casting machine 10 is capable of centrifugally casting a cast iron tube around a horizontal axis, and for casting operations, in the direction of an axis 12 of the tube to be cast. Reciprocating traveling is possible. As shown in FIG. 2, the traveling path of the casting machine 10 is actually configured to have a slight inclination.

At one end of the traveling path of the casting machine 10, a stationary molten metal supply device 14 is provided. This molten metal supply device
In FIG. 14, reference numeral 16 denotes a pouring trough, which can be inserted into the casting machine 10 by running the casting machine 10 and can supply molten metal into the casting machine 10 from its tip.

At the other end of the traveling path of the casting machine 10, a drawing device 20 is provided. This drawing device 20 is a casting machine
A gantry 22 is also provided with a slight inclination on the extension line of the 10 travel routes, and a trolley 24 that can reciprocate on the gantry 22 in the direction of the extension line.

On the carriage 24, there is provided a horizontal clamping device 26 formed of a link-like structure. The clamping device 26 is configured such that the cart 24 travels on the
When approaching 10, the tube cast in the casting machine 10 can be inserted into the opening at the receiving end of the tube to clamp the inner surface of the tube.

The pulling device 20 pulls the tube from the casting machine 10 by moving the carriage 24 on the gantry 22 so as to move away from the casting machine 10 with the clamping device 26 clamping the inner surface of the tube. Can be transported to the location. In the gantry 22, a roller 30 capable of supporting the transferred tube 28 is provided.

As shown in FIG. 1, a transfer device 34 for receiving a pipe 28 transferred from the gantry 22 and transferring the pipe 28 to a predetermined unloading position 32 is provided on the side of the gantry 22. ing.

As shown in FIGS. 3 to 5, the cart 24 is provided with a detecting device 38 for detecting the distance between the cart 24 and the end face 36 of the pipe 28. Specifically, a bracket 40 is attached to the cart 24, and the bracket 40 is provided with a pair of guide bars 42 parallel to the axis of the tube 28. A detection rod 44 extending in a direction parallel to the axis of the tube 28 is provided in the bracket 40 in a penetrating state.The detection rod 44 is guided by a bush 46 of the bracket 40, and is integrally formed with the detection rod 44. When the slider 48 is guided by the two guide bars 42, the detection rod 44
It is slidable in the direction of the axis of 28. A compression coil spring 50 is interposed between the bush 46 and the slider 48 in a state fitted onto the detection rod 44, and presses the detection rod 44 in a direction protruding from the bracket 40.

At the tip of the detection rod 44 at a position protruding from the bracket 40, a face plate 52 similarly protruding from the end of the carriage 24 is fixed. Further this face plate
52 has an adjustment plate 54 rotatable around the detection rod 44.
However, the position in the circumferential direction is fixed by a bolt 56 so as to be changeable. A detection pin 58 that projects in a direction parallel to the axis 12 is fixed to the adjustment plate 54 at a position radially away from the detection rod 44. At the tip of the detection pin 58, a detection point 60 is formed. This detection point 60 contacts the end face 36 of the tube 28 cast in the casting machine when the carriage 24 approaches the casting machine.

Another bracket 62 is mounted on the carriage 24, and the bracket 62 is provided with a pair of limit switches 64. On the other hand, the rear end of the detection rod 44
66 protrudes rearward from the bracket 40, and this rear end 66
The truck 24 approaches the casting machine and the detection point 60 is the end face of the pipe 28
When the detection rod 44 is pushed backward by hitting the switch 36, the detection rod 44 hits the limit switch 64 to operate the same.

In such a configuration, when the pipe 28 cast in the inside of the casting machine 10 at the other end of the traveling path is drawn, the carriage 24 approaches the casting machine 10 along the gantry 22. To run. At this time, although not shown, the detection rod 44 protrudes forward by the action of the spring 50, and the rear end 66 is located forward of the limit switch 64.
The limit switch 64 has not been operated yet.

When the carriage 24 approaches the casting machine 10, a detection pin
The detection point 60 of 58 hits the end face 36 of the tube 28, and the detection rod 44 is pushed into the inside of the bracket 40 against the force of the spring 50. When the cart 24 stops at a predetermined position before the casting machine 10, the limit switch 64 is operated by the rear end 66 of the pushed detection rod 44. At this time, the tip of the clamp device 26 is inserted into the tube 28, and the inner surface of the tube 28 is clamped by the clamp device 26.

In the drawing step, the carriage 24 starts running in a direction away from the casting machine 10. At this time, if the inner surface of the tube 28 is securely clamped, the tube 28 moves integrally with the carriage 24 and is gradually pulled out of the casting machine 10. Therefore, there is no change in the distance between the carriage 24 and the pipe 28, and this distance falls within the range of the predetermined value. At this time, the limit switch 64 is still operated at the rear end 66 of the detection rod 44, whereby it is detected that the pipe 28 is correctly clamped by the clamp device 26.

In the event of an improper situation, such as a loose clamp on the inner surface of the tube 28, a slippage occurs between the clamping device 26 and the inner surface of the tube 28. Then, as shown in FIG. 6, the cart 24 moves but the tube 28 is not pulled out of the casting machine.
The distance between the carriage 24 and the end face 36 of the tube 28 increases. At this time,
The detection rod 44 is moved by the pressing action of the spring 50 to the end face 36 of the tube 28.
Maintain contact with. Therefore, the distance between the carriage 24 and the end surface 36 of the tube 28 gradually increases, and when this distance exceeds a predetermined value, the rear end 66 of the detection rod 44 is moved to the limit switch 64.
Away from, it is detected that the clamp state is not appropriate. In this case, the operation of the clamp device 26 is released, and the carriage 24 is brought closer to the casting machine 10 again to perform the clamping again.

Although the clamp was properly clamped at the beginning of the drawing process, slippage may occur between the clamp device 26 and the inner surface of the tube 28 as the carriage 24 moves while applying a pulling force to the tube 28. is there. However, in this case as well, the occurrence of an abnormality is similarly detected by the limit switch 64.

As shown in FIG. 4, when the type of the pipe 28 to be manufactured is changed, its diameter usually changes.
In that case, the position in the circumferential direction is changed by loosening the bolt 56 and rotating the adjusting plate 54. Then
By changing the distance from the axis 12 of the tube 28 to the detection point 60, the detection point 60 is always located according to the diameter of the tube 28.

[0022]

As described above, according to the present invention, the distance between the bogie and the tube clamped by the clamp device is detected, and if this distance exceeds a predetermined value, the fact is detected and the clamp is performed. Since the occurrence of slip between the device and the pipe is detected, the slip generated between the clamp device and the pipe can be reliably detected, and not only can the pulling work be judged to be appropriate or not, but also the detection means can be determined. Is provided on the trolley
As well as at the beginning of the drawing process,
Sliding as the trolley moves while applying pulling force
Slip even when it occurs, that is, during the drawing process
In the same way, if the
Can be

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing the entire structure of a pipe casting facility using a cast pipe drawing device according to the present invention.

FIG. 2 is a schematic front view showing the entire structure of the facility.

FIG. 3 is a plan view of a cast pipe drawing device according to an embodiment of the present invention.

FIG. 4 is a side view of the drawing device.

FIG. 5 is a front view of the drawing device.

FIG. 6 is a view showing an operation state of the drawing device.

[Explanation of symbols]

 10 Casting machine 24 cart 26 Clamping device 28 Tube 36 End face 38 Detection device 60 Detection point 64 Limit switch

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-B-44-22086 (JP, B1) (58) Field surveyed (Int. Cl. ⁷ , DB name) B22D 13/10 B22D 13/12 B22D 29 / 04

Claims (1)

(57) [Claims] 1. A device for drawing a tube from a casting machine capable of centrifugally casting a tube around a horizontal axis, comprising: a clamping device for clamping an inner surface of the tube to be drawn; with attached, a bogie which travels to a predetermined position so as to pull out the tube clamped by the clamping device from the casting machine, the carriage
In addition, the distance between the carriage and the clamped tube is detected, and if this distance exceeds a predetermined value, this is detected, and the occurrence of slip between the clamp device and the tube is detected. Means for drawing a cast pipe.