JPH0957338A - Steel plate coil rewinding device - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a steel plate coil rewinding device that can reliably prevent a steel plate from being caught during rewinding and that does not cause a disadvantage such as a significant cost increase. I am trying. A left and right table rollers (8) are provided with a clamper (10) as a self-clamping device for expanding a steel plate which can reciprocate in a longitudinal direction along a groove (9), and an end portion of a rewound steel plate (S) is clamped by the clamper (10). It was sandwiched by and pulled in the rewinding direction of the steel plate S. The pulling speed of the steel plate S determined by the moving speed of the clamper 10 is 5 than the rewinding speed of the steel plate S determined by the rotation speed of the pinch roll 3.
Use a speed that is about% faster. Further, the clamper 10 is provided with a guide plate that supports the entire end portion of the steel plate S in the width direction from the lower surface side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rewinding device for a steel sheet coil that rewinds at least a part of a steel sheet wound into a coil into a flat state, and more particularly to a surface inspection for inspecting the surface state of the steel sheet coil. The structure is suitable for equipment.

[0002]

2. Description of the Related Art A rewinding device for a steel sheet coil used in a conventional surface inspection facility has a structure as shown in FIG. That is, in this rewinding device, a steel plate coil 1 to be rewound is inserted into a reel 2 which can be rotationally driven, and a pinch roll 3 which can be rotationally driven in synchronization with the reel 2.
And a leveler roll 4 continuously arranged on the pinch roll 3, and a development table 7 in which a plurality of driven table rollers 5 and aprons 6 are alternately arranged.

Then, the steel plate coil 1 to be rewound is inserted into the reel 2, and by rotating the reel 2, the end portion of the steel plate coil 1 is rewound to be caught in the pinch roll 3, and thereafter the pinch roll 3 is used. Is rotated in the same direction in synchronization with the reel, the steel plate S is straightened by passing it through the leveler roll 4, and the steel plate coil 1 is rewound to move the steel plate S on the table roller 5 of the expansion table 7. Then, the steel plate S is horizontally developed on the expansion table 7 by a length (for example, about 30 m) required for the inspection.

[0004]

However, in the conventional steel plate coil rewinding apparatus as described above,
As the reel 2 and the pinch roll 3 are rotationally driven, the steel plate S is pushed from the rear side to be unfolded on the unfolding table 7. Therefore, as shown in FIG. 10 which is a side view and FIG. 11 which is a perspective view. It often happens that the end of the steel plate S is caught between the table roller 5 and the apron 6 and the progress of the steel plate S is hindered. Therefore, it is necessary to stop the rewinding once when the steel plate S is caught and rewind it after the catch is eliminated, which requires a long time to prepare for the surface inspection. was there. Such a problem is caused especially by a steel plate having a thin plate thickness or a wide steel plate, the end portion of which is easily hung down, and a steel plate whose end portion is easily caught between the table roller 5 and the apron 6. Occurred relatively often when deploying.

This problem has been dealt with by rotating the table roller 5 in the feed direction, but this still often causes a catch when developing a thin steel plate. , Was not an adequate solution. Moreover, if the unfolding table 7 is about 30 m long, about 30 table rollers 5 are provided.
The structure that drives all the table rollers 5 is very disadvantageous in terms of equipment cost, installation space, maintenance, and the like. Further, by providing drive rolls similar to the pinch rolls 3 at a plurality of positions in the middle of the expansion table 7 and feeding the steel plate S by a large number of the pinch rolls 3, the steel plate S is horizontally expanded while preventing it from being caught. However, in this case, since the pinch rolls 3 cover places on the upper surface side of the steel sheet S, there is a problem in that the surface inspection of the steel sheet S becomes an obstacle particularly when applied to surface inspection equipment. .

[0006] The present invention has been made by paying attention to the unsolved problems of the conventional technique as described above.
It is an object of the present invention to provide a steel plate coil rewinding device that can reliably prevent the occurrence of the above problem and that does not cause a disadvantage such as a significant cost increase.

[0007]

In order to achieve the above object, the invention according to claim 1 is a rewinding device for a steel plate coil for rewinding at least a part of a steel plate wound into a coil into a flat state. A self-clamping device for deploying a steel plate is provided, which sandwiches an end portion of the steel plate and pulls the steel plate in a rewinding direction. That is, since the self-clamping device for expanding the steel plate pulls the end part of the steel plate, it is difficult for the end part of the steel plate to be caught.

According to a second aspect of the present invention, in the rewinding device for a steel plate coil according to the first aspect, the steel plate expanding self-clamping device is faster than the rewinding speed of the steel plate. The end portion of the steel plate was pulled. In this case, it is desirable that the pulling speed of the steel plate be several% (for example, 5%) higher than the rewinding speed of the steel plate.
The speed should be fast. Then, the steel plate is surely developed flat.

The invention according to claim 3 is the rewinding device for a steel plate coil according to claim 1 or 2, wherein the self-clamping device for expanding the steel plate has a width of an end portion of the steel plate. It has a guide plate that supports the entire direction from the bottom side. That is, since the guide plate supports the entire width direction on the lower surface side of the end portion of the steel sheet, it is possible to prevent the side edge portion of the steel sheet having a wide width from hanging down.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 7 are views showing an embodiment of the present invention, which shows an embodiment when a rewinding device for a steel plate coil according to the present invention is applied to surface inspection equipment. It should be noted that the same components as those of the conventional rewinding device shown in FIG. 9 are denoted by the same reference numerals, and redundant description thereof will be omitted.

First, the structure will be described. As shown in FIG. 1 which is a plan view and FIG. 2 which is a side view of a schematic structure of a rewinding device for a steel plate coil in a surface inspection facility, the expansion table 7 for the steel plate S is The same table roller 5 as the conventional one is disposed on the most leveler roll 4 side over the entire width direction of the expansion table 7, and a predetermined interval is provided on the downstream side (left side in FIG. 1) of the table roller 5 in the rewinding direction of the steel plate S. A plurality of short table rollers 8 arranged apart from each other and divided into right and left
And is composed of A groove 9 extending in the longitudinal direction of the unfolding table 7 is provided between the table rollers 8 divided into the left and right.
Are formed, and the groove 9 extends from the position close to the table roller 5 to the end of the expansion table 7.

And, between the left and right table rollers 8,
A clamper 10 is provided as a self-clamping device for expanding a steel plate that can reciprocate in the longitudinal direction along the groove 9, and the end of the steel plate S to be rewound is sandwiched by the clamper 10 and pulled in the rewinding direction. I have to. Specifically, a pair of sprocket wheels 11A and 11B are provided at the front and rear ends of the groove 9, and a pair of sprocket wheels 11A and 11B are provided on the back side of the groove 9 so as to be spaced apart in the front-rear direction (the left-right direction in FIG. 1). A chain tensioning device 12 including fixed wheels 12a and 12b and a movable wheel 12c that can move up and down is arranged, and a chain 13 is stretched over the sprocket wheels 11A and 11B and the chain tensioning device 12, and one end of the chain 13 The portion is fixed to the front side of the clamper 10, and the other end of the chain 13 is fixed to the rear side of the clamper 10. That is, the sprocket wheel 11
When A (or 11B) is rotationally driven in the normal rotation direction or the reverse rotation direction, the chain 13 reciprocates and circulates, so that the clamper 10 fixed to the chain 13 reciprocates along the groove 9. Here, the direction in which the clamper 10 travels from the sprocket wheel 11A side to the sprocket wheel 11B side is the going direction, and the direction in which the clamper 10 runs from the sprocket wheel 11B side to the sprocket wheel 11A side is the going direction. The rotation direction of the sprocket wheels 11A and 11B when moving in the direction is the forward rotation direction, and the rotation direction of the sprocket wheels 11A and 11B when the clamper 10 is moving in the return direction is the reverse rotation direction.

Detailed configuration examples of the clamper 10 are shown in FIGS.
Shown in 3 is a partially cutaway side view, FIG. 4 is a plan view,
FIG. 5 is a sectional view taken along line VV of FIG. That is, these FIG.
As shown in detail in FIG. 5, the clamper 10 has, as a main body, a substantially box-shaped housing 20 whose upper and lower surfaces are formed by assembling the left and right side plates 20a and 20b and the front and rear end plates 20c and 20d. One end of the chain 13 is fixed to the outer surface of the front end plate 20c of the housing 20,
The other end of the chain 13 is fixed to the outer surface of the rear end plate 20d.

The left and right side plates 20 of the housing 20 are also provided.
The rotatable wheels 21 are fixed at four positions on the outer surfaces of the outer surfaces a and 20b, which are separated from each other in the front and rear, with their rotation axes oriented in the left-right direction (the width direction of the groove 9), and also the side plates 20a. , 20b on the outer surface of each wheel 21 closer to the end of the housing 20 than the fixed position of the wheel 21, a guide roll 22 is fixed so as to extend outward from the axle end surface of the wheel 21 with its rotation axis oriented in the vertical direction. ing.

As shown in FIG. 5, in particular, above the groove 9, a transverse cross section is formed so as to be located further inside the bearing unit 8A inside the table roller 8 and extend in the longitudinal direction of the groove 9. A pair of U-shaped rail members 23 are arranged so as to sandwich each wheel 21 with a margin in the vertical direction. That is, this clamper 10 has its wheels 2
1 travels in the longitudinal direction of the groove 9 while rolling on the inner bottom surface of the rail member 23. Also, the clamper 10
The guide roll 22 provided so as to project to the left and right sides even if the track of the rail is displaced in the left-right direction.
Since it rolls on the inner surface of the clamper 10, stable running of the clamper 10 is ensured. The rail member 23
A cushioning sheet 23a made of, for example, a rubber-like elastic body, which is long in the longitudinal direction of the rail member 23, is attached to the inner surface of the rail member 23 in order to mitigate the impact when the wheel 21 or the guide roll 22 collides.

On the other hand, rising portions 20e are formed above the respective end plates 20d of the side plates 20a and 20b, and the end plates 20 of both rising portions 20e are formed.
The housing 2 is attached to the vertically rising end face 20f on the c side.
A plate-like member 25 extending in the left-right direction of 0 and extending over the entire width direction of the expansion table 7 is fixed by, for example, welding in a state where the width direction is oriented vertically.

On the vertical surface of the plate member 25 facing the end plate 20c, a lower guide plate 26 extending in the left-right direction like the plate member 25 and extending over the entire width direction of the expansion table 7 is formed. , Fixed horizontally. The edge portion 26a of the guide plate 26 near the end plate 20c is slightly inclined downward. An upper guide plate 27 extending toward the end plate 20c with a width substantially equal to that of the housing 20 is fixed to the upper end surface of the plate member 25. An auxiliary plate 27A is fixed to the lower surface of the end portion of the guide plate 27 on the side of the end plate 27d by welding or the like in parallel with the plate member 25. The auxiliary plate 27A is inserted between the side plates 20a and 20b and the plate member 25 is inserted. The guide plate 27 can be firmly fixed to the housing 20.

The edge portion 27a of the guide plate 27
Is inclined slightly upward, and both guide plates 2
Due to the edges 26a and 27a of 6 and 27, the end plate 20
A guide port 28 that guides the end of the steel plate S entering from the c side and is guided between the two guide plates 26 and 27 is formed. Note that when the clamper 10 is located closest to the table roller 5 side, it extends in the left-right direction like the guide plate 26 so that it is positioned further toward the end plate 20c of the lower guide plate 26, and the substantially expansion table 7 is provided. The apron 6 is fixed on the expansion table 7 over the entire width direction of the.

Further, the gap between the guide plates 26 and 27 must be wider than the thickness of the steel plate S to be developed. Therefore, when applied to the surface inspection equipment into which various steel plates S such as thin plates and thick plates are carried, the gap between the two guide plates 26 and 27 needs to be set based on the plate thickness of the thickest steel plate S. is there. On the other hand, a pair of flat plate-shaped brackets 30a and 30b are fixed to a substantially central portion in the front-rear direction in the housing 20 so as to face each other at a predetermined distance in the left-right direction, and the eccentric cam is provided between the brackets 30a and 30b. 31 is attached with its rotating shaft 31a oriented in the left-right direction. The eccentric cam 31 has such a size that the upper end thereof reaches directly below the lower surface of the upper guide plate 27 when the eccentric cam 31 rotates and the side that largely bulges outward in the radial direction around the rotation shaft 31a faces upward. Has become. An opening 26A is formed in a portion of the lower guide plate 26 just above the eccentric cam 31 to allow the eccentric cam 31 to project upward. Further, on the surface of the eccentric cam 31 on the side that largely projects outward in the radial direction, a sharp portion is formed on the steel plate S when the surface faces upward.
A non-slip member 31A composed of a large number of ridges formed so as to be bitten into the bracket is formed, and the eccentric cam 31 has an axial center portion on the surface opposite to the side where the anti-slip member 31A is formed. 31B is integrally formed so as to project.

Further, shafts 33a and 33b facing the width direction of the housing 20 and divided into right and left are fixed at positions near the end plates 20c in the housing 20, and the shafts 33a and 33b are provided with a box. A body 34 is rotatably attached, and a tip end side of a telescoping telescopic rod 35, which is telescopic, is fixed through the box body 34. The rear end side of the telescopic rod 35 is attached to the bracket 3 of the eccentric cam 31.
1B is rotatably connected to a shaft 31b penetrating in the thickness direction thereof, and a coil spring 36 that constantly urges the telescopic rod 35 in the direction of the arrow B in FIG. are doing.

The smoothly formed rear end surface of the telescopic rod 35 contacts the substantially arcuate outer surface of the bracket 30a.
When the telescopic rod 35 extends due to the urging force of the bracket 31, the bracket 31
B is displaced so as to wrap around to the lower rear side as shown by an arrow C in FIG. Also, the bracket 31B
An upper end portion of a substantially dog-legged lever 38 is rotatably attached to the shaft 31b opposite to the side to which the telescopic rod 35 is attached with the lever sandwiched therebetween. However, a long hole facing the longitudinal direction is formed through the upper end of the lever 38, and the shaft 31b penetrates through the long hole. That is, the shaft 31b and the lever 38 can be relatively displaced in the longitudinal direction of the lever 38 within the range of the elongated hole.

In the bent portion of the lever 38, the convex side thereof is the end plate 2
A shaft 38a fixed toward the width direction of the housing 20 penetrates between the side plates 20a and 20b, facing the 0c side, and passing through the bent portion. This allows lever 3
8 is rotatable about a shaft 38a as a fulcrum. A wheel 38b having a rotation axis oriented in the width direction of the groove 9 is attached to the lower end of the lever 38. The lever 38 has a dimension such that the wheel 38b at the lower end thereof is slightly above the bottom surface of the groove 9. It is about to be located in.

Further, the clamper 10 is provided on the bottom surface of the groove 9.
As shown in FIG. 3, a thick plate 9A on which the lower end of the lever 38 can ride is fixed when is located closest to the table roller 5. A sloping surface 9a is formed at the left end of the thick plate 9A in FIG. 3 to assist the rolling of the wheels 38b of the lever 38 and to make the lever 38 ride smoothly.

Even if the clamper 10 moves, the guide plate 2 that greatly extends from the housing 20 to the left and right.
As shown in FIG. 5, a gap α is formed between the plurality of table rollers 8 other than the table roller 8 closest to the table roller 5 and the guide plate 26 so that the table roller 6 and the table roller 8 do not collide with each other. Thus, for example, the position of the shaft of each table roller 8 is slightly shifted downward.

Next, the operation of the steel plate coil rewinding device will be described. That is, when the steel plate coil 1 attached to the reel 2 is not rewound, the sprocket 11
A is driven and the clamper 10 is moved to the table roller 5 most.
To the side. That is, at the start of rewinding, the clamper 10 is set in the state shown in FIG. In this state, since the lower end portion of the lever 38 rides on the thick plate 9, the upper end portion of the lever 38 is located on the upper front side while resisting the biasing force of the coil spring 36.
1 is accommodated below the guide plate 26, and a gap is formed between both guide plates 26 and 27.

When the rewinding of the steel plate coil 1 is started, the reel 2 is rotationally driven so that the end portion of the steel plate coil 1 projects toward the pinch roll 3 side, and the end portion is caught in the pinch roll 3. . After the end portion of the steel plate S is bitten into the pinch roll 3, the pinch roll 3 rotates in the same direction in synchronization with the reel 2, the steel plate S is further fed to the leveler roll 4, and the steel plate S moves the leveler roll 4 By passing, it is corrected and returned to a substantially flat state.

The steel sheet S that has passed the leveler roll 4 further advances and passes over the table roller 5, and is guided by the first table roller 8 and the apron 6, and its end portion enters into the guide port 28. Then, the steel plate S is further fed by the rotational driving of the reel 2 and the pinch roll 3, but the rewinding of the steel plate coil 1 is temporarily stopped at the time when the end of the steel plate S contacts the plate member 25 or immediately before the contact. .
While the steel plate coil 1 is unwound from the reel 2 and the end of the steel plate coil 1 is caught in the pinch roll 3, speed control for adjusting the rotation speed of the reel 2 is executed. After biting into the pinch roll 3, current control is executed for the reel 2 and the pinch roll 3, and the reel 2 is rotated so that the pinch roll 3 is slightly braked.

Further, when the rewinding of the steel plate coil 1 is temporarily stopped, that is, when the end of the steel plate S comes into contact with the plate-like member 25 or immediately before it comes into contact, the steel plate S is pinched by the pinch rolls 3. This can be easily performed by counting the number of rotations of the pinch roll 3 immediately after the pinch roll 3 is caught by using a pulse generator and obtaining the moving distance of the steel sheet S from the counted value and the circumference of the pinch roll 3.

After the rewinding of the steel plate coil 1 is temporarily stopped, the pinch roll 3 is rotationally driven again to restart the rewinding of the steel plate coil 1. At the same time as the rotational drive of the pinch roll 3 is started, the sprocket 11A is rotated. The clamper 10 is rotated in the forward direction to move the clamper 10 in the forward direction. The clamper 10 goes from the position shown in FIG. 3 to the left direction.
When it moves to, the lower end of the lever 38 also moves in the same direction with the rolling of the wheel 38b, goes down the slope 9a, and moves to the thick plate 9A.
Since the state of riding on the vehicle is eliminated, the lower end side of the lever 38 can rotate in the direction of arrow A in FIG.

Then, the urging force of the coil spring 36 in the direction of arrow B causes the bracket 3 of the eccentric cam 31 to move.
1b rotates in the direction of arrow C. The distal end side of the telescopic rod 35 is rotatable around the shafts 33a and 33b,
The rear end surface of the telescopic rod 35 can move smoothly along the outer surface of the bracket 30a, and the hole through which the shaft 31b at the upper end of the lever 38 penetrates is a long hole. The rotation is successful.

If the bracket 31b rotates,
Since the eccentric cam 31 also rotates in the same direction, the slip stopper 31
The portion where A is formed rotates in the direction of arrow D, and the opening 26
The slip stopper 31A comes into contact with the lower surface of the steel plate S after passing through A, but the slip stopper 31A is dimensioned so as to reach directly below the lower surface of the upper guide plate 27.
A tries to further rise due to the urging force of the coil spring 36. Therefore, the steel plate S is firmly sandwiched between the eccentric cam 31 and the lower surface of the guide plate 27. The state at this time is schematically shown in FIG.

The pulling speed of the steel plate S, which is determined by the moving speed of the clamper 10 in the going direction, is about 5% faster than the rewinding speed of the steel plate S, which is determined by the rotation speed of the pinch rolls 3, and thereby the pinch is performed. The steel plate S between the roll 3 and the clamper 10 is surely developed horizontally. Further, even if the steel plate S tries to come out of the clamper 10 due to such a speed difference, the sharp portion of the slip stopper 31A bites into the steel plate S, so that the steel plate S falls off from the clamper 10 during the pulling. Is prevented.

Here, if the above speed difference is given,
Before the non-slip 31A fully penetrates into the steel plate S, the steel plate S
Since it is feared that the steel plate will come out of the clamper 10, until the lower end of the lever 38 completely comes off the thick plate 9A, the pulling speed of the steel plate S by the clamper 10 and the steel plate S by the pinch roll 3 It is desirable that the rewinding speeds be the same, and this can be easily achieved by applying an electric motor in which the rising specifications of the electric motor for rotationally driving the sprocket 11A and the electric motor for driving the pinch roll 3 are substantially the same. Even if the rising characteristics of both electric motors are different and the pulling speed of the steel plate S by the clamper 10 is faster from the beginning, a sufficient distance is secured between the plate member 25 and the eccentric cam 31. If so, the slip stopper 31A will bite into the steel plate S before the steel plate S is completely removed from the clamp 10, so there is no particular problem.

Then, since the clamp 10 pulls the end of the steel plate S and the steel plate S is flattened on the spreading table 7, the end of the steel plate S is caught as shown in FIGS. 10 and 11. There is no such thing. In particular, in this embodiment, when the steel plate S is inserted between the guide plates 26 and 27, the lower guide plate 26 supports the entire width direction of the end of the steel plate S from the lower surface side. Even if S is a thin plate, the corners and the like of its end will not hang down. Therefore, it is possible to reliably prevent the end portion of the steel plate S from being caught.

Therefore, the preparation for the surface inspection of unrolling the steel sheet S can be surely carried out within a predetermined time, and when considering the automation of the rewinding equipment of the steel sheet coil 1, there is no catch. If so, there is an advantage that equipment for detecting the abnormality is unnecessary. Also, compared with the conventional solution in which the table roller is driven to rotate in the feed direction, since there is only one new drive system, equipment cost, installation space,
It is very advantageous in terms of maintenance.

When the steel plate S is spread over the entire expansion table 7 by, for example, about 30 m while being pulled by the clamper 10, the rotational drive of the sprocket 11A and the pinch roll 3 is stopped, and the properties such as the presence or absence of irregularities on the surface of the steel plate S are visually or automatically detected. Although it is inspected by the inspection device, the drive roll similar to the pinch roll 3 is not provided at a plurality of positions in the middle of the expansion table 7, so that the surface inspection of the steel plate S is performed in this embodiment. The above is also advantageous.

When the surface inspection of the developed steel plate S is completed, the sprocket 11A is rotationally driven in the reverse direction to move the clamper 10 in the return direction and the reel 2
Also, the pinch roll 3 is rotationally driven in the rewinding direction.
At the time of rewinding, the moving speed of the clamper 10 due to the rotational drive of the sprocket 11A is set to the pinch roll 3
The unwinding speed of the steel sheet S is also reduced by about 5%, so that the steel sheet coil 1 is wound while the steel sheet S is under tension.

When the lower end of the lever 38 reaches the thick plate 9A, the lower end of the lever 38 rides on the thick plate 9A while the wheel 38b rolls on the slope 9a, so that the lever 38 is attached to the coil spring 36. The eccentric cam 31 rotates at the same time as its upper end moves to the front upper side while rotating against the power.
Rotates, the portion where the slip stopper 31A is formed is disengaged from the steel plate S, and the eccentric cam 31 is housed below the guide plate 26. At this point, the rotational drive of the sprocket 11A is stopped and the clamper 10 is stopped. The state at this time is schematically illustrated in FIG. 7.

Then, the steel plate S becomes free in the removing direction, so that when the pinch roll 3 and the reel 2 further rotate in the winding direction, the steel plate S is removed from the clamper 10 and the winding of the steel plate coil 1 is completed. . As described above, according to the structure of the present embodiment, the clamper 10 is provided immediately after the start of rewinding.
Automatically sandwiches the end of the steel plate S, and the clamper 10 automatically releases the sandwiching of the steel plate S immediately before the completion of winding. Therefore, the labor of the operator does not increase.

FIG. 8 is a view showing another embodiment of the present invention, and is a partially cutaway side view of the clamper 10 like FIG. That is, in this embodiment, instead of the slip stopper 31A provided on the surface of the eccentric cam 31 in the example of FIG. 3,
On the back surface of the guide plate 27 facing when the eccentric cam 31 faces upward, the steel plate S is provided in the same manner as the slip stopper 31A.
Has a non-slip 27B that can dig into the surface of the. Other configurations are the same as those in the above embodiment.

Even with such a structure, the eccentric cam 31
If the portion that largely rotates outwardly in the radial direction faces upward and contacts the lower surface of the steel plate S, the sharp portion of the anti-slip 27B bites into the steel plate S even if the steel plate S tries to come out. The same effect as that of the embodiment shown in FIG. In addition, in each of the above-described embodiments, the case where the rewinding device for the steel sheet coil according to the present invention is used for the surface inspection equipment is described, and various advantageous points as described above are applied to the application of the present invention. Therefore, the surface inspection equipment is particularly suitable, but the present invention can be applied to other equipment.

Further, the mechanism for sandwiching the end of the steel plate S is not limited to the above-described embodiment, but may be a structure in which the end is sandwiched and held by using an electromagnet or the like. However, from the viewpoint of equipment cost and reliability, it is preferable to realize it by a mechanical link mechanism including the eccentric cam 31, the lever 38, the coil spring 36 and the like as in the above-described embodiment.

[0043]

As described above, according to the invention of claim 1, the steel plate expanding self-clamping device for sandwiching the end portion of the steel plate and pulling it in the rewinding direction of the steel plate is provided,
Since the steel plate coil is rewound while pulling the end portion of the steel plate, it is less likely that the end portion of the steel plate will be caught, and the steel plate can be surely expanded within a predetermined time. There is an effect that it is advantageous in automating the rewinding equipment, and also in terms of equipment cost, installation space, maintenance and the like.

In particular, according to the invention of claim 2, in addition to the effect of the invention of claim 1, the steel sheet can be surely developed flat, which is extremely useful when used for surface inspection equipment or the like. Suitable for And according to the invention which concerns on Claim 3, since the guide plate which supports the whole width direction of the edge part of a steel plate from the lower surface side was provided in the steel plate expansion clamp apparatus,
The guide plate can support the entire width of the bottom surface of the steel plate at the end, and even if the steel plate has a wide width, it is prevented that the side edge of the steel plate hangs down. There is an effect that such a thing can be surely prevented.

[Brief description of drawings]

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

FIG. 2 is an overall side view showing an embodiment of the present invention.

FIG. 3 is a partially cutaway side view of the clamper.

FIG. 4 is a plan view of a clamper.

5 is a sectional view taken along line VV of FIG.

FIG. 6 is a schematic configuration diagram illustrating an operation in the embodiment.

FIG. 7 is a schematic configuration diagram illustrating an operation in the embodiment.

FIG. 8 is a partially cutaway side view of a clamper according to another embodiment of the present invention.

FIG. 9 is a side view illustrating a conventional technique.

FIG. 10 is a side view illustrating a conventional problem.

FIG. 11 is a perspective view illustrating a conventional problem.

[Explanation of symbols]

 1 Steel Plate Coil 2 Reel 3 Pinch Roll 4 Leveler Roll 5, 8 Table Roller 6 Apron 7 Development Table 9 Groove 10 Clamper (Clamp Device for Steel Plate Development) 11A, 11B Sprocket 12 Chain Tension Device 13 Chain 20 Housing 26 Guide Plate S Steel Plate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masaki Aihara, 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Inside the Chiba Works, Kawasaki Steel Co., Ltd. (72) Hiromitsu Nakano 6-4 Minamikannon, Nishi-ku, Hiroshima-shi, Hiroshima No. 31 Ryosen Engineers Co., Ltd.

Claims (3)

[Claims] 1. A steel plate coil rewinding device for rewinding at least a part of a coiled steel plate to a flat state, for expanding a steel plate by sandwiching an end portion of the steel plate and pulling the steel plate in a rewinding direction. A rewinding device for a steel plate coil, comprising a self-clamping device. 2. The self-clamping device for expanding the steel plate,
The rewinding device for a steel sheet coil according to claim 1, wherein an end portion of the steel sheet is pulled at a speed higher than a rewinding speed of the steel sheet. 3. The self-clamping device for expanding the steel plate,
The rewinding device for a steel sheet coil according to claim 1 or 2, further comprising a guide plate that supports the entire widthwise end portion of the steel sheet from the lower surface side.