JPH0796328A - Device for straightening bending of tube - Google Patents

Abstract

PURPOSE:To prevent the cycle time of carriage of a tube from being affected by the straightening work of the bending of the tube. CONSTITUTION:A plurality of tubes 2 are sequentially carried by a carrying equipment 1. In the middle of the carrying passage of the carrying equipment 1, a bending inspecting device 7 to inspect the bending of the ube 2 to be carried is provided. The tube 2 which is judged to have the bending in the inspection is carried to a straightening device 4 provided to the upper part of the carrying equipment 1 by a receiving member to be driven by the chain, and the bending is straightened. The tube 2 whose bending is straightened is returned to the carrying equipment 1 by another receiving member to be driven by the chain.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a straightening device for bending a pipe, and more particularly to a straightening device for bending a pipe in a manufacturing factory of the pipe.

[0002]

2. Description of the Related Art As a conventional pipe straightening device of this type, an inspection device for inspecting a bend of a pipe to be conveyed in the middle of a conveying path of a conveying device for conveying a plurality of pipes in a horizontal forward direction. And a straightening device that straightens the bend of the pipe determined to have a bend by inspection.

In such a conventional device, all the pipes conveyed by the conveying device are subjected to the bending inspection, and when it is determined that the pipes have no bending, the pipes are straightened by the straightening device. It is transported to the next process without receiving any operation. If it is determined that the tube has a bend, the tube is subjected to a straightening action by the straightening device. Then, when the bend is corrected, it is first conveyed to the next process there.

[0004]

However, in such a conventional straightening device for bending a pipe, it takes a certain amount of time for the straightening work by the straightening device, so the time for this straightening operation is longer than the cycle time of the production line. There is a problem that it becomes long.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to solve such a problem and prevent the work of correcting the bend of the pipe from affecting the cycle time of the production line.

[0006]

In order to achieve this object, the present invention is directed to a transport device for transporting a plurality of pipes in a forward feed state, and a pipe to be transported provided in the transport path of the transport device. A bend inspection device that inspects a bend, a device that sends a pipe determined to have a bend by inspection to the outside of a conveyance path, a device that corrects the bend of the sent pipe, and a pipe that has the bend corrected. And a device for returning to the route.

[0007]

According to this structure, as a general rule, all pipes conveyed by the conveying device are inspected by the bend inspection device for the presence or absence of the bend. The pipe determined not to have a bend is transported as it is along the transport path. The pipe determined to have a bend is sent out of the transport path by the sending device, and the bend is corrected by the correction device. The pipe whose straightness has been corrected is returned to the conveying path by the returning device and conveyed to the next step. As described above, since the straightening device is located outside the conveyance path, it is possible to prevent the straightening work of the bending of the pipe from affecting the cycle time of the production line.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIGS. 1 and 2, reference numeral 1 denotes a transfer device, which can transfer a plurality of pipes 2 in a forward feed state along a horizontal transfer path perpendicular to the axis thereof. This transport device 1
Is configured so that, for example, a cast iron pipe 2 cast in a foundry is received at a carry-in position 3 and then conveyed for the purpose of processing in the next process.

A straightening device 4 is provided at a position above the carrying device 1 in a part of the carrying device 1 which constitutes a carrying path subsequent to the carry-in position 3, for correcting the bending of the bent pipe. Has been. More specifically, as shown in FIGS. 1 to 5, a frame 5 that straddles the conveying device 1 is installed, and a bend straightening machine 6 is installed on the frame 5. The transport device 1 passes through the inside of the frame 5 and the pipe 2
To transport.

In the conveying device 1, a bend inspection device 7 for inspecting whether or not the pipe 2 to be conveyed is bent is provided in a portion of the conveying path slightly on the side of the straightening device 4. 7 to 10 show the bending inspection device 7 in detail. Here, a pair of supporting rollers 8 is provided in a portion of the transport device 1 at a position corresponding to the device 7.
The roller 8 supports the pipe 2 conveyed by the conveying device 1 in the horizontal direction in the middle of its conveying path, and is capable of rotating the pipe 2 around its axis.

In the bending inspection device 7, a frame 12 is provided on the floor surface 11, and the frame 12 is provided with a cylinder device 13 which expands and contracts upward. An elevating table 14 that is moved up and down by the expansion and contraction operation of the cylinder device 13 is attached to the expansion and contraction end of the cylinder device 13. Further, a compact cylinder 15 that expands and contracts upward is provided on the lift table 14 on the same axis as the cylinder device 13. A support base 16 whose vertical position from the lift base 14 can be adjusted by the expansion and contraction operation of the compact cylinder 15 is attached to the expansion and contraction end of the compact cylinder 15. A pair of guide bars 17 extending downward are attached to the support base 16. These guide bars
17 are arranged in parallel with a distance from each other so as to sandwich the compact cylinder 15 and the cylinder device 13, and slidably pass through a bush 18 provided on the elevating table 14 and are provided on the frame 12. By being supported slidably by the bush 19, it is possible to guide the lifting and lowering of the lifting platform 14 and the support platform 16. A bracket 20 is provided on the frame 12, and the bracket 20 is provided with a pair of upper and lower proximity sensors 21 for detecting whether the lifting platform 14 is in a raised position or a lowered position.

A U-shaped bracket 22 is attached on the support 16 in a front view. Reference numeral 23 is one protrusion forming the U-shape, and 24 is the other protrusion. This bracket 22
When the lifting table 14 descends as shown in the figure, the transfer device 1
The pipe 2 is in a retracted state so as not to interfere with the transportation of the pipe 2. Further, when the lifting platform 14 rises, the tube 2 supported by the support roller 8 is sandwiched from both sides at a position spaced from the support roller 8 in the tube axial direction, as shown by a virtual line in the figure. It is possible.

One protrusion 23 of this U-shaped bracket 22
Is provided with a pair of laser light emitting devices 25 vertically spaced from each other. As shown in FIG. 9, each light emitting device 25 can irradiate a vertically long laser beam 26 toward the other protrusion 24 in the horizontal direction. This laser light is projected on the other projection 24.
A light receiving device 27 for receiving the light is provided corresponding to each light emitting device 25.

In such a structure, the elevating base 14 is raised to sandwich the pipe 2 by the bracket 22, and the position of the support base 16 is finely adjusted by the compact cylinder 15, so that the upper and lower sides can be moved up and down as shown in FIG. Laser light 26 from each light emitting device 25
Is blocked by the tube 2 and the rest reaches the light receiving device 27.

In this state, the support roller 8 rotates the tube 2 about its axis. At this time, if there is a bend in the tube 2, as the tube 2 rotates, a shake occurs at the position of the bracket 22 and the width of the laser beam 26 received by the upper and lower light receiving devices 27 changes, so that this bend occurs. Detected.

As shown in FIG. 10, by arranging a plurality of units shown in FIGS. 7 and 8 in the lengthwise direction of the pipe 2, the bend inspection device 7 allows the bend inspection device 7 to determine what part of the lengthwise direction of the pipe 2. It is possible to inspect whether a bend has occurred.

Next, the straightening device 4 will be described in detail. Figure 1
As shown in FIG. 6, posts 31 are provided on both sides of both ends of the frame 5 along the transport path of the transport device 1. Each post 31 has a pair of top and bottom sprockets 3
2, 33 are provided, and a plurality of receiving members 35 are attached at a predetermined pitch to an endless chain 34 hung over these sprockets 32, 33.

At the end portion of the frame 5 corresponding to the upper side of the conveying path, the receiving members 35 are raised in parallel by the chains 34 running on the posts 31 on both sides. The pipe 2 supported by the portion 36 is engaged with both ends of the bent pipe 2, and the pipe 2 can be transferred upward by one pitch in a horizontal posture.

On the frame 5, a pipe 2 is supported in a horizontal direction, and the pipe 2 can be sequentially fed in the same direction as the conveying direction of the conveying device 1 by a constant pitch.
Is provided. The carrying device 37 is divided into an upper hand side portion 38 and a lower hand side portion 39, and the straightening machine 6 is provided in the divided portion. Also, the upper side portion 38 and the lower side portion 39
It is possible to store a plurality of pipes 2, respectively.

On the upper side portion 38 of the transfer device 37, a pair of receiving arms 42 which are vertically swung by a cylinder device 41 are provided at a distance in the horizontal direction. The receiving arm 42 has a hook-shaped tip, and pivots from the lower side to the upper side to form the receiving member 35.
The pipe 2 which is lifted up to and supported by the upper end of the traveling path of the chain 34 can be received from the receiving member 35. Further, by rolling the received pipe 2 along the upper edge thereof, the pipe 2 can be transferred onto the transport device 37.

On the lower side portion 39 of the transfer device 37, a pair of first feeding arms 44 which are vertically swung by a cylinder device 43 are provided at a distance in the horizontal direction. Further, below the first delivery arm 44, a pair of second delivery arms 46 that are vertically swung by the cylinder device are provided at a distance in the horizontal direction. Both arms 44 and 46 have hook-shaped ends, and the first feeding arm 44 is the straightening machine 6
It is possible to receive the pipe 2 that has been straightened to the end of the transport device 37 after being straightened, and by turning downward from that state, it is possible to send this pipe 2 toward the second sending arm 46. is there. Second delivery arm 46
Is capable of receiving the pipe 2 in the same manner, and by turning downward from that state, the pipe 2 is received by the receiving member 35 located above the traveling path of the chain 34 located on the lower side of the transport path. It can be sent out.

The receiving members 35 arranged on the posts 31 on both sides on the lower side of the conveying path have the same structure as those on the upper side, and receive the pipe 2 sent out from the second sending arm 46 and move it horizontally. Can be supported by
By traveling the chain 34 in the direction opposite to the direction on the upper side, the chains 2 are lowered by a constant pitch, and the pipe 2 can be finally delivered onto the carrier 1.

Next, the straightening machine 6 will be described. As shown in detail in FIG. 3 and FIG.
A frame 48 is provided between the lower side portion 39 and the lower side portion 39, and a pair of supporting devices 49 for horizontally supporting the bent pipe 2 are provided on the frame 48 and are spaced apart in the length direction of the pipe 2. It is provided after. On one side of the frame 48, a jack device 50 for pressing the pipe 2 in the horizontal direction orthogonal to the axis.
However, a plurality of tubes are provided at a distance in the axial direction of the tube 2. On the opposite side of the frame 48, a plurality of pipe receiving portions 51 for receiving and supporting the pipe 2 pressed by the jack device 50 are provided. These pipe receiving portions 51 are arranged so as to be positioned alternately with the jack device 50 with a distance in the axial direction of the pipe 2.

According to such a structure, as shown in FIG. 6, by driving an appropriate jack device 50 according to the bending condition of the pipe and receiving the pipe 2 by the pipe receiving portion 51 corresponding thereto, A force is applied to the tube 2 to correct the bend.

As shown in FIG. 1, in the conveying device 1, a bending inspection device 55 having the same structure as the bending inspection device 8 is re-inspected in a portion of the conveying path slightly lower than the straightening device 4. It is provided for. At the position corresponding to the bend inspection device 55, the pipe 2 determined to have a bend by the bend inspection device 55 is dropped into the frame of the transport device 1 and the dropping device 56 is dropped. A carry-out device 57 for horizontally carrying out the carrier 1 is provided.

As shown in FIG. 2, at a position following the end of the carry-out device 57, a pipe storing / conveying device 58 having the end as the starting end is provided. This device 58 can receive the pipe 2 from the carry-out device 57, convey the pipe 2 in the opposite direction parallel to the conveying device 1, and support a predetermined number of pipes 2 for temporary storage. Further, the device 58 can send the pipe 2 from the end of the transport path toward the portion of the transport device 1 on the side more than the bend inspection device 7.

In such a structure, the pipe 2 carried into the carry-in position 3 of the carrier device 1 is carried to the lower side by the carrier device 1, and the bend inspection device 7 inspects for bends. When it is determined that there is no bend that requires straightening, it is directly conveyed to the lower side by the conveying device 1, passes through the frame 5 of the straightening device 4, and is sent to the next step for processing. To be

When the bend inspection device 7 determines that the pipe 2 has a bend that requires correction, the pipe 2 is provided on the post 31 of the correction device 4 and the chain 34 is provided.
It is lifted by one pitch from the conveying device 1 by the receiving member 35 driven by. This tube 2 will then be 1 more when the next tube 2 in need of straightening is also lifted.
The pitch is lifted and the chain 34
Can be lifted to the top of the vehicle's travel path.

When this upper end position is reached, the tube 2 is fed into the upper part 38 of the transport device 37 by the receiving arm 42 which is raised by the cylinder device 41. In this upper side portion 38, the pipe 2 is also subjected to the progressive movement operation, and finally is supported horizontally by the supporting device 49 of the straightening machine 6.
In the straightening machine 6, the pipe 2 is straightened based on the bending data collected by the bending inspection device 7, for example, as shown in FIG.

The straightened tube 2 is sent out to the lower side portion 39 of the conveying device 37, reaches the terminal end of the conveying device 37 by the forward movement operation, and is received by the first feeding arm 44. Then, by the cylinder device 43, the first feeding arm 44
The tube 2 is received by the second delivery arm 46 by lowering. Furthermore, this second delivery arm 46
Is lowered by the cylinder device 45, so that the pipe 2
From the second delivery arm 46, it is delivered to the receiving member 35 waiting at a predetermined position. Then, similarly, it is lowered by one pitch by the receiving member 35 and finally taken into the transport device 1.

The pipe 2 returned to the transport device 1 is again inspected for bends by the second bend inspection device 55, and if it is determined that the bend is properly corrected, the pipe 2 is directly transferred by the transport device 1. Sent to the process.

As described above, since the pipe 2 is taken out of the conveying device 1 and the bend thereof is straightened, the straightening work of the pipe 2 is prevented from affecting the cycle time of the production line. It is possible to realize a processing line that is quick and has good productivity.

When the second bending inspection device 55 determines that the straightening is still necessary, the pipe 2 is dropped from the conveying device 1 downward by the dropping device 56 and conveyed by the unloading device 57. Is transported to the side of the device 1,
It is sent to the pipe storage and transfer device 58. The pipe 2 sent to and stored in the device 58 is then sent again to the correction device 4 to be corrected again.

[0034]

As described above, according to the present invention, a pipe judged to have a bend is sent out of the conveying path by the sending means and then the bend is corrected by the straightening device. The bend straightening operation can be performed independently of the flow of the production line and separately, so that it is possible to reliably prevent the bend straightening operation from affecting the cycle time of the production line.

[Brief description of drawings]

FIG. 1 is a front view of a pipe conveying device in which a pipe bending correction device according to an embodiment of the present invention is installed.

FIG. 2 is a plan view of the portion shown in FIG.

FIG. 3 is an enlarged front view of a main part in FIG.

FIG. 4 is a side view of the portion shown in FIG.

5 is a plan view of the portion shown in FIG. 3. FIG.

FIG. 6 is a diagram for explaining the operation of the straightening machine in the bending straightening device.

7 is an enlarged front view of the bending inspection device in FIG.

FIG. 8 is a side view of the bending inspection device.

FIG. 9 is an operation explanatory diagram of the same bending inspection device.

FIG. 10 is a diagram showing an arrangement state of the bending inspection device.

[Explanation of symbols]

 1 Transport device 2 Pipe 4 Straightening device 6 Straightening device 7 Bending inspection device 34 Chain 35 Receiving member

Claims (1)

[Claims] 1. A transport device for transporting a plurality of pipes in a forward feed state, a bend inspection device provided in the middle of a transport path of the transport device for inspecting bends of the transported pipes, and a bend by inspection. Then, a device for sending out the determined pipe to the outside of the transport path, a device for correcting the bend of the sent out pipe, and a device for returning the bend-corrected pipe to the transport path. Bending correction device.