JPH0323245B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a nose bending device in an opening head for a strip coil.

[Conventional technology and its issues]

As is well known, a strip coil is a strip that has been rolled in a finishing mill and run on a hot line table, and then wound into a coil shape. When such a strip coil is processed (pickling, plating, etc.) using strip processing line equipment, a strip coil tip drawing device is used to pull out the tip of the strip coil.

That is, when pulling out (unwinding) the strip coil, first, the tip is bent back by an opening head with a nose bending device, and then the tip of the strip coil is caught in a pinch roll and sequentially pulled out.

Regarding such a strip coil tip drawing device, many proposals have been made to shorten the operating time and automate the device. For example, in Japanese Patent Application Laid-Open No. 59-19029, a swingable frame is suspended from a cart that reciprocates in the horizontal direction, and an opening knife equipped with a strip coil tip detection device and a deflore are installed at the lower end of the frame. ,
By providing a clamp head facing this and a nose bending device provided downstream of this defrole, the traveling of the trolley and the swinging of the frame can be appropriately controlled according to the difference in the diameter of the strip coil. Proposals have been made to automate the withdrawal of the tip of the machine.

However, as shown in FIG.
With the clamp head 1a' located above, and the deflation roll 2' provided below the clamp head 1a',
A clamping device is configured to clamp the tip end 3' of the strip coil, and a nose bending roll 4a' is provided downstream of this clamping device (the downstream side when the strip is threaded). The tip 3' of the strip coil is bent. Therefore, the strip coil and the nose bending roll 4a' must be in line contact (point contact in side view). Therefore, when the nose bending roll 4a' is raised in the direction of the arrow a in FIG.
is bent with a gentle curvature R, and if the nose bending roll 4a' is not installed to some extent downstream from the tip of the strip coil (on the side of the defroster 2'), the tip 3' will come off the nose bending roll 4a'. Since it is no longer possible to unbend the tip, the curl of the pulled-out tip 3' cannot be removed and the tip remains curled. Therefore, if the strip is thin, a sufficient bending effect cannot be obtained and the curl will return to its original shape, while if the strip is thick, the bending effect will be relatively large, but for the reasons mentioned above, it will not be possible to completely unbend it to the leading edge. The tip is pointing downwards.

An analysis of such a nose bending state shows that if there is a restriction in the space for installing the nose bending roll 4a', the nose bending roll 4a' and the clamp head 1a' shown in FIG. 4 are arranged as close as possible, Although the distance 1 between the two is reduced, it is not possible to increase the vertical movement distance h of the nose bending roll 4a', and a sufficient bending effect cannot be obtained.

On the other hand, in order to obtain a sufficient bending effect, the distance l between the nose bending roll 4a' and the clamp head 1a' is increased, and the vertical movement distance h of the nose bending roll 4a' is
Although a sufficient bending effect can be obtained by increasing , a large space is required, and the curvature R of the nose bending part b is large, making the shape of the tip 3' of the strip coil unstable, and the leading edge sagging. During threading, the tip end 3' of the strip coil abuts against the roll on the downstream side, which is inconvenient.

Therefore, it has become impossible to unmanned the strip processing line equipment.

[Means to solve the problem]

Therefore, the present invention was created in order to solve the problems of the conventional nose bending device, and its gist is that the strip coil is located above the
and a clamp head mounted on a horizontally movable trolley, a def roller disposed below the clamp head, an opening knife disposed upstream of the def roll, and a nose bending device disposed downstream of the def roll. In the opening head portion configured by the above, the nose bending device is configured with a table plate, and the table plate is movably supported with respect to the deflore, and more preferably, the table plate is pivotally supported on the deflore,
A nose bending device for an opening head part is characterized in that it is rotatable about the axis of a defrole.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure and operation of the present invention will be explained in detail with reference to embodiments shown in the accompanying drawings.

FIG. 1 is a schematic diagram of an embodiment of the present invention, FIG. 2 is an enlarged view of the main part of FIG. 1, and FIG. 3 is an explanatory diagram of the operation of the tip of the strip coil according to this embodiment.

First, in FIG. 1, the first strip coil 5 is attached to the payoff reel drum 6,
While being pressed by a pressure roll 7 provided above, it is rewound through a pinch roll 8 and dispensed. On the other hand, a second strip coil 10 mounted on a cradle roll 9 of a coil car (not shown) is raised until it comes into contact with a snubber roll 11. This snubber roll 11 is driven by an electric motor 13 via a chain. Note that the cradle roll 9 is also driven by an electric motor (not shown).

The table frame 14 is a table base 15
It is guided by a hydraulic cylinder (not shown) so that it can be retracted in a direction perpendicular to the paper plane of FIG. 1, and can selectively enter and exit the processing line. An entry side table 17 and an exit table 16 are provided on the table frame 14, and these tables 17, 16 are arranged on the entry side and the exit side, respectively, as shown by the arrows by hydraulic cylinders 19, 18. It is expandable and retractable.
Further, the clamp device 20 is arranged upstream of the pinch roll 8. In addition, the trolley 21 is
The machine is moved approximately parallel to the processing line by a hydraulic cylinder 24 on a rail 23 attached to the machine 2. Note that this pedestal 22 is attached to a foundation (not shown) or a frame of an adjacent machine.

The opening head portion 25 is connected to the hydraulic cylinder 2
6 to the guide rod 27, the first
It can be moved up and down from position A to position C in the figure. The opening head portion 25 is provided with a clamp head 1a that moves downward, and a deflation roll 2 located below and opposite to the clamp head 1a. An opening knife 28 and a nose bending device 4 are provided before and after this deflore 2.
is installed. That is, the defroller 2 has an opening knife 2 on the upstream side that is wedge-shaped in side view.
8 is rotatably mounted along the circumferential surface of the deflore roll 2 with its point facing outward, and on the downstream side there is a nose having a flat table plate 4b fixed to its upper surface at a position approximately symmetrical to the opening knife 28. A bending device 4 is rotatably mounted along the circumferential surface of the deflation roll 2. One end of a hydraulic cylinder 29 is pivotally connected to the clamp device main body 1, and the other end of the hydraulic cylinder 29 is pivotally connected to the outer end of the nose bending device 4. Therefore, the opening knife 28 and the nose bending device 4 are made rotatable about the axis of the deflore roll 2 by expanding and contracting the hydraulic cylinder 29. Further, the clamp head 1a can be guided by the guide rod 27 and moved up and down toward the deflore roll 2 by expanding and contracting the hydraulic cylinder 30. In addition, in FIG. 1, 31 indicates the frame of the pressure roll 7, and the third
In the figure, 32 indicates a leveler roll 32 provided downstream of the pinch roll 8, and 33 indicates a carrier roll.

Since the configuration of this embodiment is as described above, its operation is performed as follows. That is, while the first strip coil 6 attached to the payoff reel drum 6 is being rewound and unwound,
A second strip coil 10 placed on the cradle roll 9 of the coil car is raised until it abuts the snubber roll 11.

In this state, the opening head portion 25 is in position C shown in FIG.
It descends until it comes into contact with the strip coil 10 of. At this time, the entry side and exit side tables 17,
16 is in a shrunken state. Next, when the opening head section 25 stops, the tip of the opening knife 28 is brought into contact with the second strip coil 10 by the hydraulic cylinder 29.
Note that the tip of this second strip coil 10 is connected to the snubber roll 11 and the opening knife 2 in advance.
Move it between 8 and 8. Next, the snubber roll 11 and the cradle roll 9 of the coil car are driven to send the tip of the second strip coil 10 to a position past the deflation roll 2. In this state, the clamp head 1a is lowered to clamp the tip end 3 of the second strip coil 10, and then the opening head 25 is raised to position B while keeping the second strip coil 10 clamped.

At this position B, actuate the hydraulic cylinder 29 to raise the nose bending device 4 upward (clockwise) to the second position.
The tip of the strip coil 10 is bent (unbent). Furthermore, when the opening head section 25 is raised to position B, the entry and exit tables 17 and 16 are extended, and the clamp device 20 is opened.

Next, the carriage 21 is moved to release the clamp head 1a at position D, and then the opening head section 25 is moved from position E to position F and then to position A. On the other hand, the second
The tip of the strip coil 10 is dropped onto the entry table 17, and is passed through the clamp device 20 via the exit table 16 by the drive of the snubber roll 11 and the cradle roll 9 of the coil car.
It stops after passing the pinch roll 8 and is clamped by a clamp device 20.

Thereafter, the input side table 17 and the output side table 16 are brought into a contracted state, and the first strip coil 5 on the payoff reel drum 6 is unwound.
Make them wait until they are paid out. When the first strip coil 5 is completely discharged, the pinch roll 8 is driven to remove the second strip coil 1.
The coil car moves to the center of the payoff reel drum 6 while sending the tip of the coil to the downstream side, and the second strip coil 10 is attached to the payoff reel drum 6. Then, this second strip coil 10 becomes the first strip coil 5 and is rewound, and dispensing is started.

Here, as the nose bending device 4 is constructed of a flat table plate 4b as shown in FIG. Since the nose is bent by touching the nose, it is possible to avoid the curvature R that occurs when the nose is bent due to line contact with the conventional nose bending roll.

Therefore, the flows 10a, 10b, 10c, . , the pinch roll 8, the leveler roll 32, the carrier roll 33, and other rolls. In addition, in FIG. 3, 10a' indicates a state bent by the conventional nose bending roll 4a' as described above, and in this case, the sheet hits various rolls during threading and is unrolled. Work cannot be done smoothly.

Note that the nose bending device 4 of the present invention is not only applied to the tip drawing device of the second strip coil that is on standby as shown in this embodiment, but also can be used to move between the payoff reel drum and the pinch roll. Needless to say, the present invention can also be applied to a strip coil tip pull-out device mounted on a truck.

〔Effect of the invention〕

According to the present invention, the nose bending device in the strip coil tip drawing device with an opening head is constructed with a table plate instead of the conventional nose bending roll, so that the contact between the strip coil and the table plate is surface contact, and the coil The tip is curved flat to the tip. Therefore, the leading end of the strip coil does not sag as in the past, and the leading end of the coil does not hit various rolls on the downstream side during threading.

Moreover, since the starting point of contact between the strip coil and the table plate is close to the clamp head, a sufficient bending effect can be obtained compared to the case where the strip coil is bent with a gentle curvature using a conventional nose bending roll. There is no possibility that the tip of the strip coil bent upward will hit any of the various rolls on the downstream side.

In addition, since the table plate can be placed as close as possible to the deflore, a compact opening head section can be constructed, and the operation when drawing out the tip of the strip coil can be made with a small turn.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of an embodiment of the present invention, FIG. 2 is an enlarged view of the main part of FIG. 1, FIG. 3 is an explanatory diagram of the operation of the tip of the strip coil according to this embodiment, and FIG. FIG. 2 is a diagram showing a conventional example corresponding to the above. 1a...clamp head, 2...defroll,
4...Nose bending device, 4b...Table board, 5,1
0... Strip coil, 21... Cart, 25...
...Opening head section, 28...Opening knife.

Claims (1)

[Scope of Claims] 1. A clamp head located above the strip coil and mounted on a horizontally movable trolley, a deflor located below the clamp head, and an opening disposed upstream of the defrol. In the opening head portion constituted by a knife and a nose bending device disposed downstream of the deflore, the nose bending device is constituted by a table plate, and the table plate is movably supported with respect to the deflore. A nose bending device for the opening head section, which is characterized by: 2. A nose bending device for an opening head section according to claim 1, wherein the table plate is pivotally supported on a deflore and is rotatable about the axis of the deflore.