JP3102066B2 - Conveyor for sheet bar joining - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conveying device for joining sheet bars.

[0002]

2. Description of the Related Art In a hot rolling line, in order to improve production efficiency, a preceding sheet bar and a following sheet bar are joined by a sheet bar joining apparatus and continuously passed through a finishing mill. Have been.

As described above, when joining the sheet bars using the sheet bar joining apparatus, if the joining of the sheet bars is temporarily stopped before joining, the productivity cannot be sufficiently improved. A so-called traveling joining is used in which joining is performed while running the sheet bar joining device in synchronization with the movement of the sheet bar.

[0004] Such a traveling-type sheet bar joining apparatus is provided with a clamp mechanism for clamping the rear end of the preceding sheet bar from above and below, and the front traveling section travels along a sheet bar conveying device (roller table). And a rear traveling section that travels integrally with the front traveling section along a sheet bar transport device, with a clamping mechanism that clamps the leading end of the succeeding sheet bar from above and below, and is provided between both traveling sections. Generally, the sheet bar conveying device is configured to include a joining portion, but the sheet bar conveying device in a range where the sheet bar joining device travels, conveys the sheet bar on the conveying surface when the sheet bar is not joined. It is necessary to be able to lift the sheet bar above the conveying surface so that the clamp mechanism of each traveling unit does not contact when joining the sheet bar.

[0005] An example of such a conventional sheet bar joining conveyance device is described in JP-A-63-104706.

According to JP-A-63-104706, as shown in FIGS. 7 and 8, between a plurality of table rollers 2 arranged in a line direction 1 of a hot rolling line,
Divided elevating rollers 4, 5, and 6 divided into a plurality of parts (three in the figure) in the width direction 3 are arranged so as to be independently movable up and down, and extend below the table roller 2 in the line direction 1. Each of the divided lifting rollers 4, 4 is provided on the upper end of an arm 8, 9, 10 pivotally supported at its intermediate part by a beam 7.
5, 6 are supported, and the lower ends of the arms 8, 9, 10 are connected in the line direction 1 by horizontal links 11, 12, 13 in units of several lines, respectively. Numerals 13 are connected by elevating cylinders 14, 15, 16 which can be extended and retracted in the line direction 1, respectively. The arms 8, 9, 10 are swung by the elongating movement of the elevating cylinders 14, 15, 16 to separate the elevating roller. 4,
5 and 6 are raised and lowered from between the table rollers 2.

In the drawing, reference numeral 17 denotes a front running portion of the sheet bar joining apparatus, 18 denotes a rear running portion, and 19 denotes two sets of each running portion 17, 18 for clamping both ends of the seat bar 20. A clamp mechanism comprising a claw portion 21 and a clamp cylinder 22, wherein the clamp mechanism 19 of each of the traveling portions 17 and 18 can be moved close to and away from each other by a mechanism (not shown) so as to correspond to the width of the sheet bar 20.
Reference numeral 23 denotes a joint provided between the front running section 17 and the rear running section 18.

When the sheet bar 20 is not to be joined, the sheet bar joining device is removed from the hot rolling line, and the divided lifting rollers 4, 5, 6 are lowered and the table roller 2 is lowered.
The sheet bar 20 is placed on the table roller 2 so as to be conveyed by being stored in the gap, and when the sheet bar 20 is joined, the sheet bar joining device is set on a hot rolling line and Both sides of the leading end of the sheet bar 20 are clamped by the clamp mechanism 19 and both sides of the leading end of the sheet bar 20 are clamped by the clamp mechanism 19 of the rear traveling portion 18 so as to travel in the line direction 1 while joining. At 23, the rear end of the preceding sheet bar 20 and the front end of the following sheet bar 20 are joined.
By raising and lowering the divided lifting rollers 4, 5, 6 in the portion where the sheet bar joining device passes, and projecting upward from between the table rollers 2, the sheet bar 20 is lifted from the conveying surface of the table roller 2 and the lower surface of the sheet bar 20 is lowered. The claw portion 21 of the clamp mechanism 19 of each of the traveling portions 17 and 18 that grips the table roller 2 does not contact the table roller 2. The reason why the divided lifting rollers 4, 5, and 6 are provided is that the divided lifting rollers 4, 5, which are located at the optimum positions corresponding to the width dimension of the sheet bar 20, are provided.
This is to allow 5, 6 to be lifted and lowered separately.

[0009]

However, the above-mentioned conventional sheet bar joining and conveying apparatus has the following problems.

That is, the above-described conventional sheet-bar joining conveying device is configured to divide the lifting rollers 4, 5, 5 from between the table rollers 2.
6, the movable part becomes large and the cost increases, and there are problems that the number of failure parts increases and the reliability decreases.

The present invention has been made in view of the above circumstances, and has as its object to provide a sheet bar joining / conveying apparatus which is low in cost and highly reliable against failure.

[0012]

According to the present invention, a joining section in which a sheet bar joining apparatus for joining sheet bars at a height equal to the entry side line travels is provided in the middle of a hot rolling line. Provide a fixed table for conveyance having a conveyance surface lower than the height of the entry line in the section, and on the entry side of the fixed table for conveyance of the hot rolling line, the end on the side opposite to the fixed table for conveyance located at the entry line height An entrance-side tilting table is provided that can be adjusted to either the entrance line height or the height of the transporting surface of the stationary table for transportation by tilting up and down around the center. A finishing mill is provided at a height equal to the entrance line height on the exit side of the fixed transfer table, and a finishing mill positioned at the entry line height between the fixed conveyance table and the finish rolling mill. Medium side end The height of the end on the side of the fixed table for conveyance by tilting up and down is provided with an outgoing side tilting table that can be adjusted to either the incoming line height or the height of the conveying surface of the fixed table for conveyance, When the sheet bar is joined and rolled continuously, the sheet bar is sent to the sheet bar joining device and the finish rolling mill at a height equal to the entry line height, and the sheet bar is transported after the tip thereof. The upper part of the fixed table for hanging is suspended by its own weight, is placed on the fixed table for conveyance, and is conveyed by the fixed table for conveyance.

[0013]

According to the present invention, when the sheet bars are not joined, the sheet bar joining device is removed from the joining section of the hot rolling line, and the fixed table for transporting the incoming side tilting table and the outgoing side tilting table is removed. The height of the end on the side is adjusted so as to coincide with the transfer surface of the fixed table for transfer.

When joining the sheet bars, a sheet bar joining device is installed in the joining section of the hot rolling line, and the height of the end of the entrance side tilting table and the exit side tilting table on the side of the fixed table for transport is set. When the sheet bar joining device approaches, the height of the line is set to the entry side line height, and when the sheet bar joining device is separated, the line height coincides with the conveyance surface of the fixed table for conveyance.

Therefore, the conveying surface of the fixed table for conveyance in the joining section is set to a height lower than the height of the line on the incoming side, and an incoming side tilting table and an outgoing side tilting table are provided on the incoming and outgoing sides of the fixed table for conveying, respectively. Since the height of the sheet bar sent to the joining device and finishing mill is equal to the height of the line on the entry side, the number of movable parts corresponding to the height of the sheet bar is reduced, and low cost and high reliability against failure are achieved. can get.

When the sheet bar is joined and rolled continuously, the sheet bar is fed to the sheet bar joining device and the finishing mill at a height equal to the line height on the entry side, and Since the upper part of the fixed table for conveyance after the leading end hangs under its own weight, the sheet bar is naturally bent such that the sheet bar is conveyed without forcibly changing the advancing direction. It is possible to suppress the occurrence of a factor that hinders the threadability of the finishing mill due to the change in the direction.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 6 show an embodiment of the present invention.

In the drawing, 23 is a hot rolling line, 24 is a pinch roll provided in the middle of the hot rolling line 23, and 44 is a finishing mill provided downstream of the hot rolling line 23 with respect to the pinch roll 24. The finishing mill 44 is arranged at a height equal to the entry line height 26 where the pinch rolls 24 are provided.

Reference numeral 28 denotes a pinch roll 24 and a finishing mill 44
And the sheet bar joining device 29 is running between the joining section 28 and the joining section 28 has a carrying surface 30 at a lower line height 27 lower than the entry line height 26. A table 31 is provided.

On the entry side of the fixed table 31 for transport,
The pinch roll 24 side is rotatably supported by the shaft 32 extending in the width direction while rotatably supporting the entrance line height 26, and the finishing mill 44 side is moved from the lower line height 27 to the entrance line height by the tilting cylinder 33. An entry-side tilting table 34 is provided so as to be able to move up and down to 26. On the exit side of the fixed table 31 for conveyance, the entry-side line height 26 is set by a shaft 35 extending in the width direction on the side of the finishing mill 44. The pinch roll 24 side is pivotally supported so as to be rotatable while being held by the tilting cylinder 36 from the lower line height 27 to the entry line height 2.
An outgoing-side tilting table 45 supported to be able to move up and down to 6 is provided.

2 to 6, reference numeral 38 denotes a rail on which the seat bar joining device 29 provided in the joining section 28 travels, 3
Reference numeral 9 denotes a preceding sheet bar clamp provided in the sheet bar joining device 29; 40, a subsequent sheet bar clamp;
Is a joint provided between the clamps 39 and 40, and the clamps 39 and 40 and the joint 41 are set at the entrance line height 26.

Reference numeral 42 denotes a preceding sheet bar, and reference numeral 43 denotes a following sheet bar.

Next, the operation will be described.

When the sheet bar is discontinuously rolled by the finishing mill 44 without joining the sheet bar, FIG.
As shown in the figure, the sheet bar joining device 29 is removed from the hot rolling line 23, the end of the entrance side tilting table 34 on the finish rolling mill 44 side is lowered to the lower line height 27, and the pinch roll of the exit side tilting table 45 is set. The 24 side end is lowered to the lower line height 27.

In this state, when the sheet bars 42, 43 are conveyed on the hot rolling line 23 at the entry line height 26, the sheet bars 42, 43 exit the pinch roll 24, and enter the inclining table 34. By lower line height 27
Is guided to the finisher rolling mill 44 by being conveyed to the conveying fixed table 31 provided at the lower line height 27 and the delivery side tilting table 45 adjusted to the lower line height 27,
It is rolled by a finishing mill 44.

The sheet bar is joined to finish rolling mill 4
4, when the sheet bar is continuously rolled, first, as shown in FIG.
8, the end of the entrance-side tilting table 34 on the finishing mill 44 side is raised to the entry-side line height 26, and the end of the exit-side tilting table 45 on the pinch roll 24 side is set at the lower line height 27.
Down to

In this state, when the first sheet bar (preceding sheet bar) 42 is conveyed along the hot rolling line 23 at the entry line height 26, the sheet bar 42 enters at the point where it exits the pinch roll 24. It is sent to the sheet bar joining device 29 by the side tilting table 34 while keeping the entry line height 26, and the leading end of the sheet bar joining device 29, which is disposed at the entry line height 26, It passes through the joining portion 41 and the preceding sheet bar clamp portion 39 in order.

When the leading end of the first sheet bar 42 is clamped by the preceding sheet bar clamp portion 39 of the sheet bar joining device 29, the sheet bar joining device 29 is moved downstream of the joining section 28 as shown in FIG. Seat bar 42
Run at a speed equal to the feed speed of

When the sheet bar joining device 29 is run,
The leading end of the sheet bar 42 is the leading sheet bar clamp 39
Despite being clamped at the entry line height 26 due to, for example, the fixed length of the conveyance bar 3 provided at the lower line height 27,
1, the portion above the fixed table 31 for conveyance after the front end of the sheet bar 42 hangs down by its own weight and is placed on the fixed table 31 for conveyance, and is conveyed by the fixed table 31 for conveyance. .

At this time, the end of the entry-side tilting table 34 on the side of the finishing mill 44 is immediately lowered to the lower line height 27 to eliminate the step between the entry-side tilting table 34 and the fixed table 31 for conveyance.

When the sheet bar joining device 29, which clamps the leading end of the first sheet bar 42, reaches the downstream side of the joining section 28, the state of clamping the leading end of the sheet bar 42 by the preceding sheet bar clamping section 39 or the like is changed. Then, as shown in FIG. 4, the pinch roll 24 side end of the output side tilting table 45 is raised to the input side line height 26, and the leading end of the sheet bar 42 is received from the sheet bar joining device 29. When the distal end of the seat bar 42 is received by the output side tilting table 45 in this manner, the distal end of the sheet bar 42 is
5 guides it to the finishing mill 44.

As described above, when the leading end of the sheet bar 42 is bitten by the finishing mill 44, as shown in FIG.
The end of the exit side tilting table 45 on the pinch roll 24 side is lowered to the lower line height 27, and the sheet bar joining device 29 is moved backward to the upstream side of the joining section 28.

When the sheet bar joining apparatus 29 reaches the upstream side of the joining section 28, as shown in FIG. 6, the end of the entry side tilting table 34 on the side of the finishing mill 44 is raised to the entry side line height 26, and the joining section At the upstream position of the sheet bar joining device 29
Wait.

When the rear end of the sheet bar 42 passes through the sheet bar joining device 29, the rear end of the sheet bar 42 is clamped by the preceding sheet bar clamp 39, and at the same time, the subsequent sheet bar is 43 is made to catch up with the preceding sheet bar 42 inside the sheet bar joining device 29, the leading end of the following sheet bar 43 is clamped by the succeeding sheet bar clamp section 40, and the sheet bar joining device 29 is run as in FIG. 3. During the running, the rear end of the seat bar 42 and the front end of the succeeding sheet bar 43 are joined by using the joining portion 41.

The rear end of the sheet bar 42 and the following sheet bar 4
3 is joined, the entrance-side tilting table 34 in the same manner as in FIGS.
Then, the output side tilting table 45 is moved up and down to return the sheet bar joining device 29 to the upstream side of the joining section 28.

Thereafter, every time the sheet bar is joined, the same operation as in FIGS. 6, 3, 4, and 5 is repeated in order.

As described above, the transfer surface 30 of the transfer fixed table 31 in the joining section 28 is set to the lower line height 27 lower than the entry line height 26, and the transfer fixed table 3
Since the entrance-side tilting table 34 and the exit-side tilting table 45 are provided on the entrance / exit side of the sheet bar 1 respectively, the sheet bar can be conveyed without any trouble even when the sheet bar is not joined. Also, the preceding sheet bar clamp portion 39 and the following sheet bar clamp portion 40 of the sheet bar joining device 29 are prevented from coming into contact with the transport surface 30 of the transport fixed table 31.

In addition, the movable part is the entry-side tilt table 34.
And the outgoing-side tilting table 45 alone, it is possible to obtain a low cost and high reliability against a failure.

It should be noted that the present invention is not limited to the above-described embodiment, and that the structure of the sheet bar joining device is optional, and that various modifications may be made without departing from the scope of the present invention. Obviously you can get it.

[0041]

As described above, according to the sheet bar joining conveyance device of the present invention, various excellent effects can be obtained as follows.

I) The transfer surface of the fixed table for transfer in the joining section is set to a height lower than the height of the line on the input side, and an input side tilt table and an output side tilt table are provided on the input and output sides of the fixed table for transfer, respectively. Since the height of the sheet bar sent to the joining device and finishing mill is equal to the height of the line on the entry side, the number of movable parts corresponding to the height of the sheet bar is reduced, and low cost and high reliability against failure are achieved. can get.

II) When sheet bars are joined and rolled continuously, the sheet bars are fed to the sheet bar joining device and the finishing mill at a height equal to the line height on the entry side, and Since the upper part of the fixed table for conveyance after the leading end hangs under its own weight, the sheet bar is naturally bent such that the sheet bar is conveyed without forcibly changing the advancing direction. It is possible to suppress the occurrence of a factor that hinders the threadability of the finishing mill due to the change in the direction.

[Brief description of the drawings]

FIG. 1 is an overall side view of an embodiment of the present invention.

FIG. 2 is a first operation diagram when a sheet bar is joined using the apparatus of FIG. 1;

FIG. 3 is a second operation diagram when the sheet bar is joined using the apparatus of FIG. 1;

FIG. 4 is a third operation diagram in a case where a sheet bar is joined using the apparatus of FIG. 1;

FIG. 5 is a fourth operation diagram when the sheet bar is joined using the apparatus of FIG. 1;

FIG. 6 is a fifth operation diagram when the sheet bar is joined using the apparatus of FIG. 1;

FIG. 7 is a partially enlarged side view of a conventional example.

8 is a view taken in the direction of arrows VIII-VIII in FIG. 7;

[Explanation of symbols]

 23 Hot Rolling Line 26 Inlet Line Height 28 Joining Section 29 Sheet Bar Joining Device 30 Conveying Surface 31 Conveying Fixed Table 34 Inlet Side Tilting Table 42 Previous Sheet Bar 43 Trailing Sheet Bar 44 Finishing Rolling Machine 45 Outlet Tilting Table

Claims (1)

(57) [Claims] 1. A joining section in which a sheet bar joining apparatus for joining sheet bars at a height equal to the entry line height runs in the middle of a hot rolling line, and the joining section is lower than the entry line height. Provide a fixed table for transfer having a transfer surface, and incline up and down around the end of the fixed table for transfer located at the entry line height on the entry side of the fixed table for transfer of the hot rolling line. The height of the end portion on the side of the fixed table for conveyance can be adjusted to one of the height of the line on the incoming side and the height of the conveying surface of the fixed table for conveyance. A finishing mill is provided at a height equal to the entrance line height on the side, and between the fixed table for conveyance and the finishing mill, the vertical end of the end of the finishing mill located at the entrance line height is moved up and down. Tilting to The height of the end portion on the side of the fixed table for conveyance is adjusted to one of the entrance line height and the height of the conveyance surface of the fixed table for conveyance, and an output side tilting table is provided, and the sheet bar is joined. In the case of continuous rolling, the sheet bar is sent to the sheet bar joining device and the finishing mill at a height equal to the entry line height, and above the fixed table for transport after the tip of the sheet bar. A sheet bar joining conveyance device characterized in that a portion thereof hangs down by its own weight, is mounted on a fixed table for conveyance, and is conveyed by the fixed table for conveyance.