JP4890283B2 - Double belt type belt wrapper for steel strip winder - Google Patents

Description

  The present invention relates to a steel strip winding device that winds a steel strip around a mandrel at the terminal side of a continuous strip transfer line, and more specifically, a steel strip winding quality in a steel strip winding device provided with a double belt type belt wrapper, and The present invention relates to an improvement of a belt wrapper for increasing the winding work efficiency.

As shown in FIG. 4, a steel strip winding device for winding a steel strip (hot-rolled steel strip, cold-rolled steel strip, surface-treated steel strip for chemical conversion / plating treatment, etc.) in a coil shape on the line end side, It comprises a mandrel (1) (a steel strip S is wound around its peripheral surface) and a belt wrapper (2) for preventing the winding and slack of the steel strip (S) to be wound. The belt wrapper (2) has a plurality of guide rolls (6) (six rolls 61 to 66 in the figure) and an endless belt (wrapper belt) (10) stretched around the guide rolls (6). The endless belt (10) is moved and controlled between a position (indicated by a solid line) pressed against the peripheral surface of the mandrel (1) and a position (indicated by a one-dot chain line) away from the mandrel by an advance / retreat driving mechanism (described later). The
The endless belt (10) pressed against the mandrel (1) follows the rotation of the mandrel (1) and along its peripheral surface and the guide rolls (6) (61 to 66) (all are free rolls). Perform a circular motion. The steel strip (S) fed through the deflector pinch roll (PR) at the end of the steel strip transfer line is sandwiched between the peripheral surface of the mandrel (1) and the endless belt (10) to the mandrel (1). It is wound up. If the steel strip is wound around the mandrel (1) several times and tension is generated in the steel strip, the endless belt (10) does not need to be pressed, so the endless belt (10) is located away from the mandrel (1). Moved backwards.

The belt wrapper (2) is roughly classified into a single belt system having a single endless belt (10) and a double belt system having two endless belts (10) (10a, 10b). FIG. 5 shows a state where the endless belt (10) of the single belt type wrapper is pressed against the peripheral surface of the mandrel (1) and the steel strip (S) is sandwiched, and FIG. 7 shows that the endless belt (10) is a guide roll. For example, a state of being supported by the body portion (8) of the guide roll 66 in FIG. 4 is shown. On the other hand, FIG. 6 shows a state in which the steel strip (S) is pressed against the mandrel (1) by the endless belts (10a, 10b) of the double belt type wrapper, and FIG. 8 shows the two endless belts (10a, 10b) being a guide roll. The state carried by the trunk | drum (8) of (66) is shown. Each of the endless belts (10a, 10b) of the double belt type wrapper is narrower than the single type endless belt (10). The resulting deterioration and damage are relatively small, which is advantageous in terms of durability, operability, and the like, and also has an advantage that replacement is easier in comparison with the single belt type.
As shown in FIGS. 7 and 8, the guide roll (6) forming the endless belt orbit is connected to the roll shaft (7, 9) via the rolling bearing (9, 9). 8) A free roll on which a [circular body (81, 81) on both left and right sides and a cylindrical body (82)] is rotatably mounted. This free roll structure is common to the guide rolls (61) to (66).

In the winding operation of the steel strip, meandering of the endless belt (10) (10a, 10b) (axial displacement on the peripheral surface of the mandrel) and belt elongation inevitably occur due to repeated winding operation. . When the belt is stretched (belt tension is slack) or the position is shifted due to meandering, the pressing pressure against the steel strip becomes non-uniform, and as a result, the steel strip is easily loosened or unrolled (collapsed). As a preventive measure, a meandering correction roll (guide roll 62 in FIG. 4) and a tensioner roll (guide roll 63) are incorporated in the guide rolls (6) (61 to 66) that form the endless belt orbit. . The meandering roll (62) corrects the meandering of the endless belt (10) by tilt control (tilt operation in a vertical plane including the roll axis), and the tensioner roll (63) controls vertical position (arrows). This eliminates the decrease in tension due to the elongation of the endless belt (10).
Various contrivances have been proposed so far for improving belt wrappers and the like for the purpose of improving the steel strip winding efficiency and winding shape quality by the steel strip winding device.
JP 2006-095557 A JP 2003-31323 A JP 2001-252716 A Japanese Patent Application Laid-Open No. 08-192224 Japanese Utility Model Publication No. 07-003817 Japanese Patent Laid-Open No. 05-123745

To prevent the endless belt from slacking and meandering so that the pressing force of the endless belt (10) acts uniformly on the steel strip on the mandrel circumferential surface, Therefore, the meander straightening roll (62) and the tensioner roll (63) are incorporated in the guide roll (6) forming the endless belt orbit as described above.
In the double belt type wrapper, as shown in FIG. 2 (meander straightening roll 62) and FIG. 3 (tensioner roll 63), each of the meandering straightening roll (62) and the tensioner roll (63) is arranged in parallel on the left and right. It is considered effective to divide the roll into endless belts (10a) and (10b) one by one so that the belt tension can be adjusted and the meandering can be corrected for each belt. However, even if such care is applied, it is not easy to ensure a sound winding quality without winding slack or slippage. This tendency becomes more prominent as the steel strip becomes thicker. Although various proposals for improving the belt wrapper are disclosed in the above-mentioned patent publications, there is no example in which an effective solution for the above-mentioned problem of the double belt wrapper is taken.
The present invention provides a belt wrapper for an improved steel strip winding device that solves the above-described problems in the winding operation of a steel strip by a double belt belt wrapper, stabilizes the winding operation, and ensures sound winding quality. It is to provide.

The present invention includes a mandrel around which a steel strip is wound, and a double belt type belt wrapper arranged so as to surround the mandrel, and two endless belts stretched around a plurality of guide rolls constituting the belt wrapper In the steel strip winding device that presses the peripheral surface of the mandrel and winds the steel strip between the endless belt and the mandrel,
Of the plurality of guide rolls, each of the meandering correction roll and the tensioner roll is composed of two rolls arranged in parallel on the left and right, and each of the left and right rolls has a roll body rotatably mounted on a roll shaft. The guide rolls except for the meandering correction roll and the tensioner roll, the two roll barrels rotate in pairs on the left and right sides of the roll shaft. It is a twin-bottle type free roll mounted freely, and is characterized in that one endless belt is stretched over each roll body portion.

  The double belt belt wrapper of the present invention is composed of two rolls in which the meandering straightening roll and the tensioner roll are juxtaposed on the left and right sides, and the other guide rolls have a double-bottle structure, and each roll barrel is endless. Since the belt is stretched one by one, belt meandering correction by tilt control of the meandering roll and belt tension adjustment by tensioner roll lifting control are performed accurately and quickly for each belt. be able to. Therefore, the revolving motion of each of the two endless belts is maintained in a normal state with no misalignment (meandering) or slack (reduction in tension due to elongation), and there is no biasing force against the steel strip on the mandrel. Can be made to act stably, and troubles such as loosening and winding of the steel strip can be prevented in advance.

FIG. 1 shows an example of a twin-roller type roll structure of a guide roll in a double belt type belt wrapper of the present invention.
The twin-bore type guide roll has one roll shaft (7) and two roll body portions (8a) and (8b) located on the left and right sides in the axial direction. Each of the roll body portions includes left and right rolling bearings (9, 9) fitted to the roll shaft (7), and a body member (8) carried on the roller bearings. The roll body portions (8a) and (8b) are formed by an annular body (81, 81) fitted to the left and right rolling bearings (9, 9), and a cylindrical body (82) (82) (82) (82) ) And. The left and right roll body portions (8a) and (8b) are rotatable with respect to the roll shaft (7), and endless belts (10a) and (10b) are wound around each one.
The above-described twin-roller type roll structure is common to the guide rolls (61 and 64 to 66) excluding the meandering straightening roll (guide roll 62 in FIG. 5) and the tensioner roll (guide roll 63).

  Of the guide rolls (6) (61-66) that form the orbit of the endless belt (10a) (10b), each of the meandering straightening roll (62) and the tensioner roll (63) is shown in FIG. 2 (meandering straightening roll) And as shown to FIG. 3 (tensioner roll), it is comprised with two rolls located in parallel with right and left.

Each of the left and right rolls (62a) and (62b) constituting the meandering straightening roll (62) (FIG. 2) is rotated via roll shafts (7a) and (7b) and rolling bearings (9, 9). It comprises a roll body (8a) (8b) that is movably mounted. The roll body portions (8a) and (8b) are attached to the annular body (81, 81) fitted to the rolling bearing (9, 9), the cylindrical body (82) (82) spanned between the ring body (81, 81), and both ends. And endless belts (10a) and (10b) are wound around the roll body portions (8a) and (8b) one by one.
Each of the left and right meandering correction rolls (62a) and (62b) is indicated by a broken line by a tilt drive device (not shown) as a correction operation for meandering (axial displacement) of the endless belts (10a) and (10b). Tilt control according to the amount of meandering is performed.

Further, the left and right rolls (63a) and (63b) constituting the tensioner roll (63) (FIG. 3) are also each of the roll shafts (7a) and (7b), respectively, like the meandering correction roll (62). The roll body (8a) (8b) is rotatably mounted on the roll shaft via the rolling bearings (9, 9). The roll body (8a) (8b) is composed of the rolling bearings (9, 9). ) And a cylindrical body (82) (82) spanned between the annular body (81, 81) and end plates (83, 83) attached to both ends. The two endless belts (10a) and (10b) are wound around the roll body portions (8a) and (8b) one by one.
Each of the left and right tensioner rolls (63a) and (63b) is provided with an elevating drive device (67) such as a hydraulic cylinder in order to correct a decrease in the tension of the endless belts (10a) and (10b) According to 4), the vertical position adjustment is performed as indicated by the broken line.

Each of the guide rolls (6) (61-66) is provided with a roll crown as a body peripheral surface shape, as is the case with conventional guide rolls. The roll crown has an effect of suppressing meandering of the endless belt.
It should be noted that the rolling bearing (9) that carries the roll body (8a) (8b) of the twin-cylinder roll structure shown in FIG. 1 and the roll body (8) of the conventional single-cylinder roll structure of FIG. Although it has a different structure from the rolling bearing (9) that is carried, the former (Fig. 1) rolling bearing (single row deep groove ball bearing) and the latter (Fig. 8) rolling bearing (double row deep groove ball bearing) The difference is merely due to a design change, and it is optional to adopt the latter for the twin cylinder roll of the present invention, and it does not affect the function and effect.

  The arrangement of the guide roll (6) in the double belt type wrapper of the present invention and the configuration such as forward and backward movement with respect to the mandrel may be the same as those of the conventional one. This will be described with reference to FIG. 4. The belt wrapper has a frame (3) and two swing arms (4) and (5). The swing arm 4 on the steel strip entry side (hereinafter referred to as the first arm) is pivotally attached to the frame 3 at the base end side and is connected to the cylinder 42. The tip of the piston rod (43) of the cylinder (42) is connected to the first arm (4) via a connecting shaft (44), and the rear end side is attached to the frame (3) via a shaft (45). Yes. The first arm (4) rotates with the shaft (41) as a fulcrum when the cylinder (42) is driven back and forth. At the tip of the first arm (4), a steel strip guide table (46) for guiding the tip of the steel strip at the start of winding of the steel strip toward the peripheral surface of the mandrel (1) faces the mandrel (1). Projecting.

  As for the other swing arm (5) (hereinafter referred to as the second arm), the base end side is pivotally attached to the frame (3) and the cylinder (52) is connected in the same manner as the first arm (4). Has been. The piston rod (53) of the cylinder (52) is connected to the second arm (5) via the connecting shaft (54), and the rear end side is attached to the frame (3) via the shaft (55). The second arm (5) rotates around the shaft (51) as the cylinder (52) is driven forward and backward.

A guide roll (61) (presser roll) is attached to the first arm (4), and guide rolls (65, 66) are attached to the second arm (5), respectively, and the guide roll is attached to the lower side of the frame (3). (62) A meandering correction roll, a guide roll (63) (tensioner roll), and a guide roll (64) are arranged. The movement of approaching / separating the endless belt stretched around the guide roll (6) (61-66) with respect to the mandrel (1) is performed by a cylinder connected to each of the first arm (4) and the second arm (5). (42) and (52) are performed by the interlocking advance / retreat drive.
As the guide rolls (61) and (64) to (66), the twin-barrel type roll shown in FIG. 1 is used, and the guide roll (62) (meander straightening roll) and the guide roll (63) (tensioner roll) are used. As described above, a roll constituted by a set of two right and left parallel rolls shown in FIGS. 2 and 3 is used.

In FIG. 4, the guide roll (6) has a structure in which the guide roll (6) is dispersedly arranged in one frame (3) and two arms (4) (5). The number of rolls of the guide roll (6) that forms the circulation track of the endless belt is appropriately increased or decreased depending on the apparatus design.
As a winding method of the steel strip by the belt wrapper, FIG. 4 shows a so-called upper winding (overpass) method in which the steel strip is guided to the upper peripheral surface of the mandrel (1) and wound. (1) The guide roll structure of the present invention is similarly applied to the under-winding (underpass) system that guides and winds to the lower peripheral surface, and has the same effect (prevents loosening and winding). Needless to say.

According to the present invention, the two endless belts of the double belt-type wrapper can be stably held in a normal state without any slack in tension or meandering, and can be uniformly applied to a steel strip wound around a mandrel. A pressing force can be applied.
Ensuring a stable circular motion without endless belt slack or meandering (which may cause belt contact with the belt or damage to the belt) can improve the service life and maintenance of the endless belt, and take up the steel strip. Effective for improving efficiency. In addition, the normal rotation movement of the endless belt is ensured, and the problems such as loosening and slipping of the steel strip are solved, not only stabilizing the appearance quality (winding shape) of the product coil but also rewinding the coil. It is effective in improving the appearance quality and productivity of steel strip coils, such as elimination of excessive work burden, stabilization of coil unwinding work in the next process, and elimination of troubles such as breakage and abrasion of the protruding part of the coil. .

It is an axial sectional view showing an example of a twin-roller type roll structure of a guide roll in the belt wrapper of the present invention. It is an axial direction sectional view showing an example of a meandering correction roll in a belt wrapper of the present invention. It is an axial sectional view showing an example of a tensioner roll in the belt wrapper of the present invention. It is front explanatory drawing which shows the Example of the arrangement structure of a steel strip winding apparatus. It is front sectional drawing which shows the steel strip winding state around the mandrel by a single belt type wrapper. It is front sectional drawing which shows the steel strip winding state around the mandrel by a double belt type wrapper. It is sectional drawing which shows the state by which the endless belt was hung on the guide roll of the single belt type wrapper. It is sectional drawing which shows the state by which the two endless belts were hung on the guide roll of the double belt type wrapper.

Explanation of symbols

1: Mandrel 2: Belt wrapper 3: Frame 4: First arm
41: Arm spindle 42: Cylinder 43: Piston rod
44: rotating support shaft 45: connecting shaft 46: guide table 5: second arm
51: Arm spindle 52: Cylinder 53: Piston rod
54: Rotating spindle 55: Connecting shaft

6 (61-66): Guide roll
61: Presser roll
62 (62a) (62b): Serpentine straightening roll
63 (63a) (63b): Tensioner roll
67: Elevating cylinder 7 (7a, 7b): Roll shaft 8 (8a, 8b): Roll body
81: Torus 82: Cylindrical body 83: End plate 9: Rolling bearing 10 (10a, 10b): Endless belt S: Steel strip
PR: Deflector pinch roll

Claims (1)

A mandrel around which a steel strip is wound, and a double belt type belt wrapper arranged so as to surround the mandrel, and two endless belts stretched around a plurality of guide rolls constituting the belt wrapper, In the steel strip winding device that presses against the peripheral surface and winds the steel strip by sandwiching it between the endless belt and the mandrel,
Of the plurality of guide rolls, each of the meandering correction roll and the tensioner roll is composed of two rolls arranged in parallel on the left and right, and each of the left and right rolls has a roll body rotatably mounted on a roll shaft. The guide rolls except for the meandering correction roll and the tensioner roll, the two roll barrels rotate in pairs on the left and right sides of the roll shaft. A double-belt belt wrapper for a steel strip winding device, wherein the belt-wound free rolls are freely mounted, and each end of the roll body is covered with one endless belt.

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