JPH0436766B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a method for taking out a strip, and in particular, it relates to a method for taking out strips, and in particular, a method for taking out strips, and in particular, a method for taking out strips by sequentially inserting inner ends or outer ends of a plurality of horizontally placed coils. It relates to a very convenient and efficient method of successively removing strips by stacking them in a bonded state. The present invention is particularly applicable to an uncoiler for winding a plurality of narrow metal strips sheared by a slitter into a coil and then continuously feeding them into a press machine or the like without causing creases, scratches, etc. It is suitably used as a method for taking out strips.

In addition, it can also be usefully used to take out coils of flexible materials such as plastic and paper.

BACKGROUND OF THE INVENTION In general, rolled wide metal strips such as rolled copper products are sheared into narrow slit strips of product size by a slitter depending on the purpose, and wound into a disk shape from each sheared end. A narrow slit strip is wound to a certain length to form a coil (also commonly known as a pancake). The coils are uncoiled from an uncoiler, i.e. a rotary unwinding device, for delivery to processing equipment, such as a press machine, for further processing. Conveniently performing this unwinding operation is important in the manufacturing process of metal strip products.

Conventional technology Conventionally, the uncoiler method for metal strips is as follows: Vertical uncoiler method Horizontal uncoiler method Traverse method has been typically implemented.

The vertical uncoiler method is a method in which each coil is set in an uncoiler vertically like a movie reel, and the coil strips are taken out by rotating the coil. In this method, after using one coil, the next coil must be set one by one, so the worker must adjust the coils, which are normally stacked horizontally on a pallet, one by one, to the vertical position. It took a long time to set up the machine, and the operating rate of processing equipment such as press machines was extremely low. It was also dangerous to raise and set up such a heavy coil from a horizontal position. For each coil, it is necessary to stop the operation of the processing equipment and set the starting end of the coil in the processing equipment after stopping its operation, which leads to a decrease in the operation rate of the processing equipment and may damage a part of the equipment. Furthermore, the processing equipment could only process one coil length, which placed a limit on the product length. In order to continuously feed long metal coil strips into a press machine, etc., it is necessary to create a large diameter coil by welding several coil strips. It is difficult to use, difficult to handle, and there are naturally restrictions on the coil length.

Alternatively, welding the inner end of the preceding coil to the outer beginning of the next coil was considered, but this also led to a significant reduction in the availability of the processing equipment.

The horizontal stacking uncoiler method uses a pallet (frame)
In this method, a pallet of coils stacked horizontally is placed on a turntable of an uncoiler, and the coils are taken out one coil at a time from the outside (or inside) from top to bottom while rotating the turntable. This method differs from the previous vertical method in that the coils are stacked horizontally on a pallet, and each pallet can be placed directly on the turntable of the uncoiler, which greatly improves work efficiency. Basically, the drawbacks of the vertical system still remained. In other words, after each coil is unwound, the processing device is stopped and the starting end of the next coil is set in the device, or when one coil is nearing the end, the end of the coil is placed in the next coil below. It was necessary to weld the starting end of the coil. This resulted in a significant drop in the operating rate of processing equipment. The same applies to other drawbacks.

The last traverse method is to weld the slitted strips to create a long strip, which is wound continuously on a reel like a spool, for example, from the left end to the right end and then from the right end to the left end, and then the reel is rotated. This is a method in which one reel is unwound while moving.
Although this method has the advantage of being able to handle continuous lengths of strips, it has the following disadvantages: (a) Winding the strips around the reel is troublesome;
It takes time and effort. In addition, large-scale equipment for this purpose is required.

(b) If the conditions for winding the strip around the reel are poor, the strip may shift during transportation, causing scratches on the surface or making it impossible to take out the strip.

(c) Because the edges of the strip wound on top of the strip always overlap, minute scratches occur. Therefore, it cannot be used in applications with strict surface requirements.

(d) When turning the strip at the end of the reel, the strip must be bent, which may leave a bend in the strip.

(e) An expensive reel for winding the strip is required.

(f) Transporting and handling heavy reels is troublesome. Additionally, a special reel stand is required for transporting the cylindrical reel.

(g) Because the shape of the reel is fixed, only a certain weight can be wound, and any product that cannot be wound must be discarded.

Problems to be Solved by the Invention As explained above, the three conventionally implemented methods have inherent drawbacks, and these methods cannot fully meet the conditions required of modern uncoilers. Recently, with the rapid development of electronic devices, the demand for narrow strips that require precision, such as lead frames and substrates, is increasing. In order to achieve these requirements, it is necessary to minimize interruptions in the operation of the processing equipment, 2) to be able to continuously feed strips of arbitrarily set length to the processing equipment, and 3) to meet the strict requirements for product quality. 4. In addition, in relation to product quality, the end of the preceding strip and the tip of the next strip should be eliminated in the conventional horizontal uncoiler system or traverse method. When welding, the presence of a thickness difference in the welded part has once again become a problem, and it is necessary to eliminate such material difference in the welded part (this problem is caused by the fact that the rolled strip before slitting is This arose from the fact that the thickness was inevitably different between the two, and conventionally the tip and rear ends, which had different thicknesses, had to be welded together.), 5. Special tools and tools like those seen in the traverse method were required. We are currently looking into a new coil extraction method that satisfies the following requirements: 6. Good workability; 7. No increase in cost.

Therefore, an object of the present invention is to develop a coil strip extraction method that satisfies these requirements and is also applicable to handling precision products such as lead frames.

Structure of the Invention As a result of repeated studies aimed at the above-mentioned purpose, the present invention has determined that the optimal approach is to take advantage of the good workability of the conventional horizontal stacking uncoiler system while converting it to a continuous system. Based on this judgment, we conducted repeated trials to realize this goal. As a result, we came up with an idea for a new connection between coils in horizontally stacked coils that would enable continuous extraction, and achieved good results as a result of implementation. That is, by unwinding a plurality of coils with different winding directions every other coil from a stacked state by sequentially joining the inner ends or outer ends of adjacent coils,
We succeeded in obtaining a method for extracting coil strips that can solve the above-mentioned problems all at once.

Based on the above findings, the present invention has been developed by stacking a plurality of horizontally placed coils with different winding directions every other coil by sequentially joining the inner ends or outer ends of the adjacent coils. While rotating the uncoiler in one direction, the strips are successively taken out from the upper coil to the lower coil by sequentially passing through the inner ends or outer ends of the joined adjacent coils. A method for taking out a coil strip with features is provided.

DETAILED DESCRIPTION OF THE INVENTION Referring to FIG. 1, a rolled wide strip 10 is sheared by a slitter into narrow slit strips S1-6 as shown by dotted lines (here shown as six strips). The front ends of each of these slit strips are designated as A1-A6, and the rear ends are designated as B1-B6, respectively.

As these slit strips are sheared, they are wound up to form coils 1-6 as shown on the right.
Each coil is wound here clockwise from the inside to the outside, with the front ends A1 to A6 being inside and the rear ends B1 to B6 being outside.

To provide a supplementary explanation of the problems with the conventional horizontally stacked uncoiler system, in the conventional horizontally stacked uncoiler system, coils 1 to 6 are stacked horizontally on a pallet (frame) and the entire pallet is placed on the uncoiler's turntable. He placed the coil on top and took out the coils one by one from the outside to the inside and from the top to the bottom while rotating the turntable. When the unwinding of the coil 1 is nearing the end, the processing equipment is stopped, A1, which is the end (inner end) of the coil 1, is welded to B2, which is the end (outer end) of the next lower coil 2, and Coil 2 is unwound, and when the unwinding of coil 2 is near the end, coil 2 is unwound.
The operation of welding A2, which is the end of the coil, to B3, which is the tip of the next lower coil 3, and unwinding the coil 3, was repeated until the final coil 6. This caused a significant decrease in the operating rate of processing equipment. In addition, the welded parts are A1-B2, A2
-B3, A3-B4, A4-B5... As already mentioned, the rolled wide strip 10
The thickness of the A-end and the B-end is inevitably different, which causes the problem of a step difference between the A-end and B-end welded parts, which have different thicknesses.

According to the invention, the coils 2, 4, 6 are turned inside out, and after forming the coils 2', 4', 6', these coils 1, 2', 3, 4', 5, 6' end They are stacked on a pallet with their outer ends welded together in order. Note that the coils 2', 4', 6' are wound counterclockwise from the inside out, contrary to the coils 1, 3, 5.

FIG. 2 is a diagram illustrating the principle of the present invention, where the coil strips are represented by lines for clarity. The outer end B1 of the coil 1 is the extraction end. The inner end A1 of the coil 1 is joined to the inner end A2 of the next coil 2' by welding or the like. Next, the outer end B2 of the coil 2' is joined to the outer end B3 of the next coil 3. In this way, the coils 1 to 6 are joined to each other in the order of inner ends and outer ends.

That is, the connection pattern is B1 (starting end) inside A1-A2 outside B2-B3 inside A3-A4 outside B4-B5 inside A5-A6 B6 (final end). Therefore, the A-A ends on the same side and B-B on the inside and outside of the wide strip
Since the ends are joined together, there is no difference in material level during welding or the like. This was created for the first time by the present invention.

In this connected state, a desired number of chips are piled up on the pallet 12 to form one lot. When the previous lot has been taken out, the next waiting lot that has been joined is placed on the turntable 13 of the uncoiler together with its pallet. Of course, this does not preclude joining the coils one by one on a turntable.

The extraction operation is performed in the following order: from the outside of the coil 1 to the inside, from the inside of the coil 2' to the outside, from the outside of the coil 3 to the inside, from the inside of the coil 4' to the outside, from the outside of the coil 5 to the inside, and from the inside of the coil 6' to the outside. As shown in Figure 1, the coils 2', 4', and 6' are turned upside down and the winding direction is reversed, so even if the take-out changes from outside to inside to inside to outside, the turntable will stay in place. Directional rotation enables smooth unwinding of each coil through the entire lot. Therefore, scratches and distortions do not substantially occur.

Figure 3 shows coils 1, 2', 3, 4', 5, 6'
The figure shows the state where the lot consisting of the pallet 12 is placed on the turntable 13 of the uncoiler 11 and the unloading operation is started. Coil take-out end B1
is set in processing equipment 20, which is, for example, a press machine, via guide rolls. The turntable is rotated by a motor (not shown) at a speed that corresponds to the processing speed of the processing equipment. Thus, the coils are unwound one after the other in a continuous and smooth manner as explained above.

However, since there is a difference between the coil feeding speed and the processing speed, and as the coil unwinding progresses, the circumferential speed changes, which often causes sagging of the strip or excessive tension of the strip. Therefore, while applying back tension to the coil upstream of the processing equipment,
It is necessary to adjust the feed speed of the strips.
Several such devices have been used in the past, such as using dancer rolls, and any of them could be used here.

Although this device itself is not related to the present invention, an example thereof is shown in FIG.
61469)). A post supporting an angle detector 15 is installed on one side of the uncoiler 11, and a dancer roller 17 is attached to the front end of a rod 16 extending forward from the angle detector 15, which extends perpendicularly to the rod. Further, an upper limit switch 18 and a lower limit switch 19 are installed on separate supports at positions where they engage with the rod. In the steady state, the dancer roller 17 is synchronized at the height of the set speed position shown in the upper side of the drawing. In this way, the strip is fed to the processing device without slack due to the back tension provided by the dancer rollers. As the winding diameter of the coil decreases, the circumferential speed decreases, so the dancer roller 17 is gradually lifted.
Since the dancer roller is linked with an angle detector,
This movement is converted into an electrical signal that speeds up the motor. The dancer roller stops its position when it synchronizes with the processing speed of the processing equipment. Conversely, when the processing speed is slow and there is slack in the strip, the dancer roller 17 descends as shown below, and the motor is decelerated accordingly via the angle detector. For safety, an upper limit switch 18 and a lower limit switch 19 set the movement range of the dancer rollers.

In this way, by using the coil strip removal method of the present invention and the above-mentioned strip adjustment device in combination, the coil strip can be reduced to 1.
The entire lot is continuously and smoothly delivered to the processing equipment 20.

Effects of the Invention With the rapid development of electronic devices, we have developed a coil strip extraction method with excellent continuity and workability that can meet the increasing demand for narrow strips that require precision for lead frames, substrates, etc. The development was successful.
Specifically, the present invention provides the following benefits: (1) It becomes possible to take out the coil strip continuously without causing damage or distortion.

(2) There is no need to interrupt the operation of processing equipment.

(3) There is no difference in material level at the joint.

(4) There is no need for the special reel required for the traverse method, and the coil can be packaged in the same way as conventional coils.

(5) No reel stand is required, significantly reducing round-trip transportation costs.

(6) The lot weight of one pallet can be set arbitrarily for each coil.

(7) Once the starting end of the first coil is set in the processing equipment, the operator does not have to touch the wire until one pallet is used, which is safe.

(8) There is no particular cost increase.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram illustrating the process from the wide strip to the coil. FIG. 2 is a simplified explanatory diagram showing the principle of the present invention. FIG. 3 is a perspective view showing the state of taking out the coil strip according to the present invention. 10: Rolled wide strip, S1 to S6: Slit strip,
1 to 6: Coil formed after slitting, 2',
4', 6': Inverted coil, A1-A2: Front end of wide strip, B1-B2: Rear end of wide strip, 11: Uncoiler, 12: Pallet, 13: Turntable,
15: angle detector, 16: rod, 17: dancer roll, 18, 19: upper and lower limit switches, 20: processing equipment.

Claims (1)

[Claims] 1 A plurality of horizontally placed coils with different winding directions every other coil are placed on an uncoiler with the inner ends or outer ends of adjacent coils connected in order and stacked. A method for taking out a coil strip, the method comprising: rotating the coil in one direction, and sequentially taking out the strips from the upper coil to the lower coil, sequentially passing through the inner end or outer end of the joined adjacent coils.