JPS6130734Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a coil end clamping device in a coil unwinding device, which has a function of holding the end of a coil wound with a steel plate in a state where it is ready for rolling operation against a mill. be.

Generally, a long steel plate is wound into a coil and stored, and then milled to undergo rolling or surface treatment. At this time,
The steel plate must be unwound from the coil. A coil unwinding device is used at this time.

In this type of conventional coil unwinding device, the coil is mounted on an unwinding reel called a payoff reel, and unwinding of the steel plate is started from the surface layer, but after the unwinding is finished, the device is temporarily stopped. A new coil needs to be installed. Installing this new coil takes a relatively long time, and this time becomes pure idle time, significantly reducing the availability of the device.

Therefore, a coil unwinding device has been proposed in which the next coil to be unwound is kept on standby, and the next coil is unwound immediately after the previous coil is unwound. .

FIG. 1 illustrates a conventional rolling line equipped with this type of coil unwinding device. In the figure, the reference numeral 1 indicates a chain conveyor, and the chain conveyor 1 conveys a coil C. A coil car 2 is disposed on the leading end side of the chain conveyor 1 so as to be able to move from side to side in FIG. 1 on rails 3 via wheels 4. The moving direction of the coil car 2 is perpendicular to the chain conveyor 1.

A truck 5 is provided on top of the coil car 2. This truck 5 is fixed to the tip of a rod of a cylinder 6 that is attached perpendicularly to the coil car 2, and one end of the truck 5 is in contact with the outer peripheral surface of a coil C placed on the truck 5 to rotate. A pressing roller 7 is attached to rotate the coil C, and drive rollers 8 and 9 are attached to rotate in contact with both sides of the lower end of the coil C, thereby imparting rotation to the coil C in the unwinding direction.

To transfer the coil C onto the cart 5, the coil car 2 is moved to the leftmost position in Figure 1, and a bar for transferring the coil (not shown) is inserted between the chain conveyor 1 and the coil C placed on it from the front side in Figure 1, and the coil C is then transferred onto the drive rollers 8 and 9.

A payoff reel 10 is arranged on the right side of the coil car 2 in FIG. The installation position of the payoff reel 10 corresponds to the rightmost position of movement of the coil car 2. This payoff reel 10 is provided so as to be movable in the axial direction by a hydraulic cylinder (not shown), and is configured such that the coil car 2 can be moved to the right end and the coil C can be attached thereto. A guide table 11 is arranged on the side of the payoff reel 10.

A straightening roll 12 is arranged above the unwinding preparation position of the coil car 2. Straightening roll 12
As shown in Figure 1, the coil consists of three rollers, two on the bottom and one on the top, and the tip of the coil is inserted between the top and bottom rollers and fed to correct curls in the steel plate. It is something.

Above the payoff reel 10, a straightening roll 1 is provided.
A guide table 13 is provided in an inclined state with the second side facing downward, and guides the tip of the coil that has been straightened by the straightening roll 12 and sent out.

A frame 14 is arranged on the rear end side of the guide table 13, and a pair of upper and lower pinch rollers 15, 16 are mounted within the frame 14. The pinch roller 15 is configured to be able to freely move up and down by a hydraulic cylinder.

The reference numeral 17 is a mill that performs surface processing and rolling, such as a skin pass mill.
The steel plate coming out of this mill passes through a group of guide rollers 18, and then conversely passes through a curved roll 19 for bending the steel plate, and is wound onto a take-up reel 29 as a coil C.

In the apparatus having the above structure, first, the steel plate unwound from the surface layer of the payoff reel 10 is guided by the guide table 11 and fed into the mill through between the pinch rollers 15 and 16 in the lowered position. It is then subjected to predetermined processing and wound onto a take-up reel 20.

While this unwinding work is being carried out, the trolley 5
The tip of the coil C placed above in the unwinding preparation position is corrected by the correction roll 12, guided onto the guide table 13, and the tip is placed on the frame 14.
It is placed on standby near the

The details of the guide table 13 are as shown in cross section in FIG.

That is, this guide table 13 is provided with an introduction part 21 on one side, and a guide part 22 on the other end side. This guide portion 22 is provided so as to be extendable and retractable by a hydraulic cylinder 23 provided below the guide table 13. This guide table 13 is connected to a guide plate 24 by a hydraulic cylinder (not shown) or the like.
At the same time, it can be pulled out laterally in the axial direction of the payoff reel 10 and positioned outside the unwinding locus of the steel plate.

Additionally, a hydraulic cylinder 25 is attached to the frame 14.
A magnet 26 is provided so as to be movable up and down. The tip of the steel plate guided on the guide table 13 is attracted by the magnet 26, and can be supported while the steel plate is being unwound from the payoff reel 10.

In this way, after the unwinding operation from the payoff reel 10 is completed, the steel plate can be immediately fed into the mill from the coil in the standby state.

By the way, the thickness of the steel plate is usually about 1.5 mm to 6.5 mm, but if the wall thickness is relatively thin, the attraction force by the magnet 26 will be small, and the steel plate guided in an inclined state by the guide table 13 will be Even if only the tip of the steel plate contacts the magnet 26, the adsorption force of the magnet 26 weakens because the steel plate does not fully adhere to the entire surface of the magnet 26 due to the inclination of the steel plate, and the weight of the slack part of the steel plate causes it to be pulled in the direction of the inclination. There is a danger of falling. Furthermore, even if the tip of the steel plate is adsorbed in a curved state, exactly the same result will occur. In any case, sufficient adsorption force can only be obtained when the steel plate is completely parallel to the surface of the magnet 26 and in close contact with it.

The object of the present invention is to eliminate the above-mentioned conventional problems and provide a coil tip clamping device configured to reliably attract and hold a steel plate.

In this invention, in order to achieve the above object, a holding plate is provided which is rotated by a cylinder, the steel plate is mechanically held between this holding plate and a magnet, and the wall thickness of this holding plate is We have adopted a structure that increases the adsorption force of the magnet by making it relatively thick.

Hereinafter, details of the present invention will be explained with reference to the drawings.
FIG. 3 illustrates one embodiment of the present invention, in which the same parts as in FIGS. 1 and 2 are designated by the same reference numerals.

A cylinder 27 is provided at the upper end of the frame 14, and a support frame 29 is horizontally attached to the lower end of the piston rod 28, which faces vertically downward. A magnet 26 is mounted at the lower end of the support frame 29 and on the axis of the piston rod 28 via a bracket 31 so as to be able to swing to some extent.

On the other hand, a hydraulic cylinder 32 is provided near the outer end of the support frame 29, and its piston rod 3
A rotary arm 36 is rotatably supported by a shaft 35 on a bracket 34 extending downward from the lower surface of the outer end of the support frame 29 at the tip of the rotary arm 36 via a pin 37 at the base end thereof. The bearing is mounted on the shaft.

A pinch roller 15 is provided at the tip of the rotating arm 36,
Holding plate 3 through pin 38 while facing 16 side.
9 is attached so that it can rotate over a predetermined angular range. This presser plate 39 has a thickness of approximately 20 mm.
It is made of an iron plate with a diameter of about 1.0 mm and is attached to the tip of the rotating arm 36 by the pin 38 via a bracket 40.

Stoppers 41 and 42 are fixed to the rotating arm 36 on both sides of the bracket 40, respectively.
The range of rotation is regulated. Note that the reference numeral 43 is a hydraulic cylinder that moves the pinch roller 15 up and down.

Next, the operation of this embodiment constructed as described above will be described. First, when it is desired to hold the leading edge of a steel plate guided onto the guide table 13, the hydraulic cylinder 27 is operated to lower the support frame 29, and therefore the magnet 26, from position A to position B near the leading edge of the guide table 13. Then, the leading edge of the steel plate that has been guided and straightened by the straightening rollers 12 is held by the magnet 26.
The steel plate is guided to the underside of the magnet 26, its tip being detected by the light projector 44 and light receiver 45 provided above and below the frame 14, and the feed of the steel plate is stopped by the detection signal, and the hydraulic cylinder 32 is operated to extend the piston rod 33, and the rotating arm 36 is rotated clockwise in the drawing around the shaft 35 at position B, so that the pressing plate 39 is pressed against the underside of the magnet 26 to clamp the tip of the steel plate.
The suction force by the steel plate is increased, and the steel plate is
Since the steel plate is pressed against the magnet 26 by the pressing plate 39 and is also supported by the pressing plate 39, the steel plate is securely held.

At this time, the magnet 26 is attached to the support frame 29.
It is swingably provided on the bracket 31 of
Further, since the holding plate 39 is also swingably provided on the rotating arm 36, even if the tip of the steel plate is sent below the magnet 26 in an inclined state, the holding plate 39 can be moved so that the tip of the steel plate is When the magnet 26 and the holding plate 39 are pressed against the lower surface of the magnet 26 through The steel plates are brought into close contact with each other in a completely parallel state, and the tips of the steel plates are securely clamped and held.

After the steel plate is securely held by the magnet 26 and the holding plate 39, the guide table 13 is moved from below the steel plate to the side, and the cylinder 27 is operated to lower the magnet 26 and the tip of the steel plate to position D. The cylinder 43 is operated to lower the upper pinch roller 15 toward the lower pinch roller 16 to sandwich the steel plate. Note that while the magnet 26 and the tip of the steel plate are being lowered and moved to the D position, the tip of the steel plate is firmly and firmly clamped by the action of the magnet 26 and the holding plate 39 as described above. Therefore, the tip of the steel plate will not fall off from this clamping part due to the weight of the slack part of the steel plate or the inclination of the steel plate.
Next, unwinding of the steel plate from the waiting coil C is resumed by the operation of the pinch rollers 15 and 16, processing is performed by a mill, and the coil C is moved to a normal position where the payoff reel 10 is located.

As is clear from the above explanation, the present invention has the structure described in the claims for utility model registration, so the tip of the coil, which is in the state of preparation for unwinding, is held between the lower surface of the magnet and the holding plate. The holding plate is thick enough to be able to be held by the magnet, and the magnet and the holding plate are attached to the support frame and the support frame, respectively. Because the coil is swingably supported by a rotating arm that is rotatably supported on the shaft, even if the coil tip is fed to the bottom surface of the magnet in an inclined state, the coil tip can be placed on the bottom surface of the magnet with a holding plate. When pressed by the magnet, the magnet and the holding plate are inclined according to the inclination of the tip of the coil, and the lower surface of the magnet, the tip of the coil, and the holding plate are parallel to each other, so that the three parts are completely The tip of the coil is tightly held by the magnet, and sufficient attraction force is applied to the tip of the coil by the magnet, so that the tip of the coil can be held even more reliably and firmly. Therefore, even when moving the coil tip, magnet, etc. from the coil tip clamping position to the regular working position,
The tip of the coil does not fall off from the clamping portion due to the weight or inclination of the slack portion of the coil, and the next routine operation can be started smoothly.

Since the holding plate is provided at the tip of the rotating arm, when the tip of the coil is held between the lower surface of the magnet and the holding plate, a sufficient pressing force is applied, so that strong holding can be achieved.

Furthermore, since the magnet and the holding plate are provided on the same support frame, the operation is reliable and the structure is simple.

[Brief explanation of the drawing]

Fig. 1 is a side view of the entire line of the device to explain the conventional structure, Fig. 2 is a partially enlarged vertical cross-sectional view to explain the guide table portion, and Fig. 3 is a vertical cross-sectional view to explain one embodiment of the present invention. It is. 1...Chain conveyor, 2...Coil car,
5...Dolly, 10...Payoff reel, 12...
Straightening roll, 13... Guide table, 14...
Frame, 15, 16... Pinch roller, 17...
...Mil, 26...Magnet, 29...Support frame,
27, 32, 43...Cylinder, 36...Rotating arm, 39...Press plate.

Claims (1)

[Scope of utility model registration request] A magnet that attracts the tip of the coil is provided near the tip of the guide table for holding the coil so that it can be raised and lowered, and the magnet and the tip of the coil are moved to a predetermined position while the tip of the coil is attracted to the bottom surface of the magnet. In the coil tip clamping device, the magnet is swingably supported on a support frame that is movable up and down; A rotary arm having a movably supported iron presser plate is mounted on a shaft,
This presser plate has a thickness that allows the magnet to apply a required attraction force to the tip of the coil, and the rotating arm is arranged such that the presser plate is between the lower surface of the magnet and the side of the magnet. A coil tip clamp device characterized in that it is rotatably provided so that the coil tip can be moved.