JP2002052452A - Polishing belt exchanger for steel strip polishing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a belt exchanger for automatically replacing a polishing belt for a steel strip polishing machine having a contact roll rotationally driven by a motor and the polishing belt carried on an idler roller for polishing a steel strip. SOLUTION: A pair of exchanger heads are installed on a truck 32 to be moved forward and backward to the polishing machine, and each of the exchanger heads can be shifted a preset distance in the direction of feeding the steel strip and one of the exchanger heads can be connected to the polishing machine. Each of the exchanger heads has mandrels 46 in a semicircular section, capable of increasing or decreasing in diameter, arranged at the upper and lower parts thereof and an air chuck provided to be movable forward and backward, and the polishing belt 56 for exchange is hung between the mandrels of one exchanger head. The air chuck grips the used polishing belt 53 to be hung on a roll 2 of the polishing machine, pulls it into the exchanger head and carries it on the mandrel. Then, the exchanger head is shifted a preset distance to be changed over, and the air chuck grips the polishing belt 56 for exchange, pushes it to the polishing machine and hangs it on the roll 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for replacing a polishing belt in a steel strip polishing machine.

[0002]

2. Description of the Related Art FIG. 1 schematically shows a steel strip polishing machine.
A contact roll 1 that is driven to rotate by a motor (not shown), an idler roll 2 that is supported so as to be able to move up and down and moves up and down by a predetermined amount by an air cylinder (not shown)
A billy roll 3 that is pressed against the contact roll 1 from below and moves up and down by a lifting device (not shown), and a polishing belt 4 that is wound around the contact roll 1 and the idler roll 2 and is driven to circulate by the contact roll 1
And a guide roll 6 disposed before and after the contact roll 1 and the billy roll 3 to guide the steel strip 5. The polishing of the steel strip 5 is performed by pressing the steel strip 5 against the steel strip 5 while feeding the steel strip 5 in the arrow direction. This is performed by feeding the belt 4 in the direction of the arrow or, depending on conditions, in the direction opposite to the arrow.

When the polishing belt 4 is replaced due to abrasion or the like, the idler roll 2 is lowered to release the tension of the polishing belt 4, and the billy roll 3 is lowered to be separated from the contact roll 1. After the contact roller 1 is tilted and the contact roll 1 is supported in a cantilever shape, the polishing belt 4 is pulled out, and then a new polishing belt is wound around the contact roll 1 and the idler roll 2. Traditionally, this has been done manually.

[0004]

When a steel strip is polished, a cooling liquid (usually mineral oil is used) is sprayed and cooled to perform the polishing operation. Therefore, when the polishing belt is replaced, the cooling liquid is dripped. Done while falling. Therefore, it is necessary for an operator to wear a rain cover or the like in a high-temperature atmosphere due to polishing heat and perform the replacement operation in a narrow space, which makes the replacement operation difficult.

[0005] An object of the present invention is to provide a polishing apparatus capable of automatically replacing a polishing belt in the above-described steel strip polishing machine.

[0006]

According to the first aspect of the present invention, a contact roll rotatably driven by a motor as a driving source, an idler roll that can move up and down, and are wound around the contact roll and the idler roll, and are circulated and driven by the contact roll. A steel belt polishing machine having a polishing belt for polishing a steel strip by means of a bogie that moves forward and backward in the roll axis direction by an operating device, and is arranged on the bogie, and transfers the polishing belt between the rolls of the steel strip polishing machine. A plurality of mandrels to be performed, a switching means for switching the mandrel so that any one of the plurality of mandrels is located on a straight line with the idler roll, and an advancing and retreating in the roll axis direction by operating means arranged on a bogie, polishing Gripping means for gripping the belt in a detachable manner.

When the polishing belt is replaced according to the present invention, the carriage is moved to the transfer position by the operating device while a new polishing belt for replacement is hung on one of the plurality of mandrels, and then the switching means is provided. Is switched so that the mandrel on which the polishing belt is not hung is positioned in line with the idler roll. The movement of the carriage and the switching of the mandrel may be performed before or after. That is, the carriage may be moved to the delivery position after the mandrel is switched as described above.

Next, the gripping means is advanced by the operating means,
The edge of the polishing belt hanging on the idler roll and the contact roll of the steel strip polishing machine is gripped. After the gripping (the polishing belt has been loosened and relaxed by the lowering of the idler roll by this time), the used polishing belt is transferred from the polishing machine onto the mandrel. Next, the mandrel is switched by the switching means, and the mandrel on which a new polishing belt for replacement is hung is positioned in line with the idler roll. Thereafter, the gripping means grips the edge of the new replacement polishing belt on the mandrel, and then moves forward by the operating means to transfer the new replacement polishing belt to the idler roll and the contact roll of the polishing machine.
After the transfer, the idler roll is raised to give an appropriate tension to the polishing belt. After the transfer, the carriage retreats and returns to its original position.

In the polishing belt changing device, the mandrel is arranged vertically so that the polishing belt can be supported up and down, that is, on the extension of the contact roll in addition to the mandrel corresponding to the idler roll, similarly to the steel strip polishing machine. It is desirable to provide a mandrel. As a result, the polishing belt can be smoothly transferred between the polishing machine and the exchange device.

In order to switch the mandrels, for example, as shown in FIG. 2, a pair of mandrels 8 arranged in parallel are shifted in the direction of an arrow, and one mandrel is positioned in line with the idler roll 2 on which the polishing belt 4 is hung. As shown in FIG. 3, a pair of radially arranged mandrels 9 can be turned in the direction of an arrow, and one mandrel can be positioned in line with the idler roll 2 on which the polishing belt 4 is hung. . Therefore, as the switching means, a mechanism for linearly reciprocating the mandrel 8 is used in the apparatus shown in FIG. 2, and a mechanism for rotating the mandrel 9 in the apparatus shown in FIG.

The mandrel may have a cross section of, for example, a circle or an ellipse, or may have a semicircle of an upper half of the circle.

As the gripping means, any means can be used as long as it can grip the edge of the polishing belt so as to be able to be engaged and disengaged.

The operating means for moving the gripping means forward and backward includes
For example, an actuator such as an air cylinder, an endless chain, a wire, and the like that are circulated and driven by a motor as a driving source can be exemplified.

According to a second aspect of the present invention, the bogie according to the first aspect of the present invention can move in a direction parallel to the feeding direction of the steel strip.
It is provided on a traversing carriage that moves in parallel with the feed direction by a second actuator.

A plurality of steel strip polishers are usually arranged in tandem in the feeding direction of the steel strip. According to the present invention, the replacement of the polishing belt for each steel strip polisher by one belt exchange device. It can be carried out.

According to a third aspect of the present invention, in the belt exchanging apparatus according to the first or second aspect, the mandrel on which a new abrasive belt for exchange is hung has a diameter larger than the idler roll of the steel strip polishing machine at the transfer destination. The mandrel to which the used polishing belt is transferred from the steel strip polishing machine is
The diameter is smaller than that of the idler roll.

According to the present invention, the polishing belt is transferred between the steel strip polishing machine and the belt changing device to the transfer destination having a smaller diameter than the transfer source having a larger diameter, so that the transfer can be performed smoothly without any trouble. Will be

According to a fourth aspect of the present invention, in the belt exchange device according to the first or second aspect, the mandrel can be radially expanded and contracted by an expansion and contraction mechanism.

According to the present invention, when the polishing belt is transferred from the transfer source exchange device to the transfer destination polishing machine, the diameter of the mandrel on which the replacement polishing belt is hung is increased from the idler roll while the transfer source polishing device is used. When the used polishing belt is transferred from the machine to the transfer destination belt changing device, the diameter of the mandrel to which the polishing belt is transferred is reduced from the idler roll. Thus, the transfer of the polishing belt between the steel strip polishing machine and the exchange device is smoothly performed without any trouble.

FIG. 4 shows an example of a mandrel according to the present invention.
Support member 1 forming the upper half of a circle slightly larger than a semicircle
1a and 11b, and air cylinders 12a and 12b for respectively moving the support members 11a and 11b in the radial direction. In a preferred example in which the mandrels are arranged vertically, the upper and lower mandrels are preferably both shown in FIG.
It is configured as shown in FIG. This allows the polishing belt 13 to be transported more smoothly.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 5, a polishing machine 22 is arranged in tandem in the feeding direction of a steel strip 21 indicated by an arrow, and a rail 23 is lowered along the polishing machine 22 in parallel with the feeding direction. It is laid. Then, the rail 24 is raised one step higher than the rail 23 for each polishing machine 22 so that the polishing machine 2
2 and is laid perpendicular to the feed direction.

As shown in FIGS. 6 to 8, the traversing vehicle 25 movable on the rail 23 is a self-propelled vehicle, and the axle 2 of the wheel 26.
7 is driven to rotate on a rail 23 by being rotationally driven by a motor 28 constituting a second operating device via a chain transmission mechanism 29, and is connected to the rail 24 on the traversing carriage in a straight line. A possible rail 31 is provided, and a carriage 32 is mounted movably on the rail 24 from the rail 31.

Sensors such as limit switches (not shown) are arranged along the rails 23 for each of the polishing machines 22.
When the sensor detects the trolley 25, the motor 28 stops. When the trolley 25 stops at a predetermined position due to the stop of the motor 28, the rail 31 is connected to the rail 24 in a straight line. I have. Although not shown, the above-mentioned sensors are also arranged on the trolley 25 at the end of the rail 24 on the rail 23 side and at the end of the rail 32.

The carriage 32 is also self-propelled, and has an axle 34 of wheels 33.
Are rotationally driven by a motor 35 constituting an operating device via a chain transmission mechanism 36, so that the rails 24, 3
When the above-mentioned sensor detects the carriage 32, it stops at a predetermined position, that is, a forward position on the rail 24 side or a retracted position at the end of the rail 31.

On the carriage 32, a shifting base 39 is movably supported on a rail 38 which is laid in parallel with the rail 23, and the steel base 21 is moved by an air cylinder 41 constituting switching means. It can be shifted by a fixed amount in the feed direction.

On the shifting base 39, a pair of exchange heads 42 are movably supported on rails 43 laid in the same direction as the rails 24. In a certain direction.

The exchange head 42 has a mandrel 46 having the structure shown in FIG. 4 at the upper part, and the mandrel shown in FIG.
A mandrel 47 having an upside-down direction is provided at a lower portion, and each of the mandrels 46 and 47 can be expanded and contracted in diameter as shown in FIG. The mandrel 47 may be fixed and not be able to expand and contract in diameter.

The exchange head 42 is also driven by a motor 48 constituting an actuating means between the upper and lower mandrels 46 and 47 as a drive source, and an endless chain 49 installed in the same direction as the rail 24; Guide bars 51 arranged side by side in parallel with
, Which are respectively mounted on the bases 52 and which advance and retreat along the guide bar 51 by driving the chains 49, and which are protruded toward the polishing machine 22 on each of the bases 52, and grip the edges of the ends of the polishing belts 53 and 56 in a detachable manner. It has an air chuck 54 as a holding means for performing the operation, and a sensor such as a photoelectric switch for detecting a belt end, which is not shown, is provided at the tip of the air chuck.

The motors 28, 35, 38, the air cylinders 41, 44, the air cylinders 12a, 12b, the air chuck 54, etc. shown in FIG. These are sequence-controlled by detection signals from each sensor and a start button (not shown).

The belt exchanging device of this embodiment is configured as described above, and when exchanging the polishing belt of the steel strip polishing machine 22, as shown in FIG.
Of the replacement abrasive belt 5
A start button (not shown) is pressed in a state where 3 is mounted on the mandrels 46 and 47, whereby the motor 28 is activated to move the traversing carriage 25 along the rails 23. The movement of the traversing carriage 25 is performed until the sensor detects the traversing carriage 25, and the sensor detects the traversing carriage 25, thereby stopping the motor 28 and stopping the traversing carriage 25 (a). 24 and connected. At this time, the mandrel 46 of the other empty exchanging head 42 without the polishing belt 56 is aligned with the idler roll 2 (see FIG. 1) of the steel strip polishing machine 22 lowered for belt loosening when replacing the polishing belt. And mandrel 47
Has the same axis as the contact roll 1.

When the sensor detects the traversing carriage 25, the motor 35 is started to move the carriage 32 from the rail 31 to the rail 24 in the direction of the arrow. The forward movement is performed until the sensor detects the carriage 32, and the position where the carriage 32 is detected becomes the transfer position, and stops at the position.

When the sensor detects the carriage 32, the air cylinder 44 is actuated to advance the empty replacement head 42 without the abrasive belt further by a certain amount.
6 and 47 are connected to the rolls 1 and 2, and the air cylinders 12a and 12b shown in FIG. 4 are operated to reduce the diameters of the mandrels 46 and 47. Next, the motor 48 is activated to circulate the chain 49 to move the table 52 forward. The advance of the table 52 is performed until a sensor provided at the tip of the air chuck detects a used polishing belt end hung between the rolls 1 and 2 of the polishing machine 12, and when the sensor detects the belt end, the motor 48 is activated. It stops, and the stand 52 stops (b). By this time, the used polishing belt 49 of the polishing machine 22 is released from tension by lowering the idler roll 2 shown in FIG. The diameter reduction of the mandrels 46 and 47 described above may be performed when the table 52 stops or after the table 52 stops.

When the sensor detects the belt end, each air chuck 54 closes and grips the edge of the belt end. After the gripping, the motor 48 is started and rotates in the reverse direction, and the chain 49 is driven to circulate in the reverse direction to move the table 52 backward while the end of the polishing belt 53 is gripped.

With the retreat of the table 52, the used polishing belt 53 is moved from the rolls 1 and 2 of the polishing machine 22 to the exchange head 42.
Are drawn into the mandrels 46, 47. The table 52 is retracted until a sensor (not shown) detects the table 52 or detects the belt end. After the detection, when the table 52 stops, the drawing in of the used polishing belt 53 is completed (c). ). At the time of drawing in, the diameters of both the mandrels 46 and 47 are reduced, and the diameters thereof are smaller than those of the corresponding idler roll 2 and contact roll 1, so that the used polishing belt 53 is smoothly drawn in without any trouble.

After the sensor detects the base 52 or the end of the belt and the base 52 stops, the air cylinder 44 operates,
The exchange head 42 is retracted and returned to the original position (d). The reason why the exchange head 42 is retracted by the air cylinder 44 is that, when the exchange head 42 is shifted in the feed direction by the operation of the air cylinder 41 as described later with the exchange head 42 advanced as shown in FIG. This is to avoid the projection 22a shown in the drawing, which projects to the side of the grinding machine 22, to avoid this. However, if the grinding machine 22 does not have the projection 22a, the replacement head 42 as described above is used.
Does not need to be retracted, so there is no need to install the rail 43 or provide the air cylinder 44.

After the air cylinder 44 is operated to return the exchange head 42 to the original position, the air cylinder 41 is operated to shift the shifting base 39 by a certain amount in the steel material feeding direction (e). After the shift, the replacement polishing belt 5
The mandrels 46, 47 of the exchange head 42 provided with 6 coincide with the axis of the idler roll 2 and the axis of the contact roll 1, which have been reduced by a certain amount.

When the shifting space 39 shifts by a certain amount due to the operation of the air cylinder 41, as described above,
The air cylinder 44 is actuated to advance the replacement head 42 provided with the replacement abrasive belt 56 by a certain amount, and the mandrel 4
6 and 47 are connected to the rolls 1 and 2 from which the used polishing belt 53 has been removed (f). At this time, the table 52 is located at the most retreated position, and the mandrels 46 and 47 hold the replacement polishing belt 56 in a state where the diameter is expanded.
The diameters of the mandrels 46 and 47 are larger than the diameters of the rolls 1 and 2, respectively.

After the air cylinder 42 is operated and the replacement head 42 is advanced by a predetermined amount, the motor 48 is activated to drive the chain 49 to circulate and advance the table 52.

When a sensor provided at the tip of the air chuck detects the end of the polishing belt 56 during the forward movement, the motor 48 temporarily stops to temporarily stop the table 52, and the air chuck 54 closes to close the edge of the polishing belt 56. To grip. After the air chuck 54 is closed, the motor 48 is started again to continue the advance of the table 52. And mandrel 46, 47
The polishing belt 56 to be hung on the roll 1 of the polishing machine 22,
Extrude on two sides. Although the above-mentioned air chuck is designed to grip the edge after being closed, the air chuck may be opened and the edge may be caught and then pushed to the rolls 1 and 2 side. In this case, the polishing belt 56a can be transferred without temporarily stopping the table 52.

The advance of the table 52 is performed until the sensor provided in the polishing machine 22 detects the end of the polishing belt 56. When the detection is detected, the motor 48 is stopped, the advance of the table 52 is stopped, and the roll 1 of the polishing belt 56 is stopped. Complete extrusion to 2 (g).

When the sensor detects the end of the polishing belt, the motor 35 is started to move the carriage 32 backward. The carriage 32 is moved backward from the rail 24 to the rail 31 until the sensor detects the carriage 32. When the carriage 32 is detected, the motor 35 stops. At this time, the trolley 32 has returned to the original position on the traversing trolley (h).

When the carriage 32 returns to the original position on the traversing carriage, the used polishing belt 53 hanging on the mandrels 46 and 47 is removed, and a new polishing belt 56 for replacement is mounted on the mandrels 46 and 47. Then, the air cylinders 12a and 12b shown in FIG. 4 are operated to expand the diameters of the mandrels 46 and 47, and apply tension to the polishing belt 56 to hold it.

Thereafter, the start button is pressed again. As a result, the motor 28 starts, and the traversing carriage 25 moves.
The movement of the trolley 25 is performed until the sensor detects the trolley, and when the trolley 25 is stopped by the detection (i), the rail 31 coincides with the rail 24 leading to the next polishing machine. Thereafter, the same operation as described above is repeated.

The above operation is sequence-controlled by a sequencer (not shown), whereby the replacement of the polishing belt is automatically performed.

[0045]

According to the first aspect of the present invention, the used polishing belt of the steel strip polishing machine is gripped by the gripping means, transferred to the mandrel of the replacement device, and the replacement polishing belt hung on another mandrel is provided. By automatically carrying out the operation of holding by the holding means and transferring to the polishing machine, the replacement of the polishing belt can be carried out automatically.

According to the second aspect of the present invention, the replacement of the polishing belt of the steel strip polishing machine arranged in tandem can be performed by one belt exchange device.

According to the third and fourth aspects of the present invention, the transfer of the polishing belt is performed smoothly without any trouble by making the diameter of the mandrel or idler roll at the transfer destination of the polishing belt smaller than that of the idler roll or mandrel at the transfer source. . According to the third aspect of the invention, the structure of the mandrel can be simplified, and in the fourth aspect of the invention, when a new replacement polishing belt is mounted on the mandrel, the diameter of the mandrel is reduced. This facilitates mounting.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a main part of a steel strip polishing machine.

FIG. 2 is a diagram showing an example of a mandrel switching method.

FIG. 3 is a diagram showing another example of a mandrel switching method.

FIG. 4 is a diagram showing a mandrel diameter expanding / contracting mechanism.

FIG. 5 is a layout diagram of a polishing machine and a belt exchange device.

FIG. 6 is a front view of the belt exchange device.

FIG. 7 is a side view of the same.

FIG. 8 is a plan view of the same.

FIG. 9 is a diagram showing an operation sequence of the belt replacement device at the time of belt replacement.

[Explanation of symbols]

 1. Contact Roll 2. Idler Roll 3. Billy Roll 4, 13 Polishing Belt 5, 21 Steel Strip 6. Guide Roll 8, 9, 46, 47 Mandrel 11a, 11b Support Members 12a, 12b, 41, 44 Air cylinders 22 Polishers 23, 24, 31, 38, 43 Rails 25 Traversing carts 26, 33 Wheels 27, 34 Axles 28, 35 48, motor 29, 36, chain transmission mechanism 32, carriage 39, shifting base 42, replacement head 49, chain 51, guide bar 52, table 53, 56, polishing belt 54. Air chuck

Claims (4)

[Claims] 1. A contact roll that is rotated and driven by a motor as a drive source, an idler roll that can be raised and lowered, a polishing belt that is wound around the contact roll and the idler roll, and is driven by the contact roll to circulate and grind a steel strip. A bogie that moves toward and away from the steel strip polishing machine in the roll axis direction by an operating device; a plurality of mandrels that are disposed on the bogie and that transfer a polishing belt between the rolls of the steel strip polishing machine; and a plurality of mandrels. Switching means for switching the mandrel so that any one of them is positioned in line with the idler roll, and gripping means for moving back and forth in the roll axis direction by operating means disposed on the carriage, and gripping the abrasive belt detachably. Means for exchanging a polishing belt of a steel strip polishing machine. 2. The steel strip according to claim 1, wherein said bogie is movable on a traversing car parallel to said feeding direction by a second actuating device. A polishing belt changing device for a polishing machine. 3. A mandrel on which a new polishing belt for replacement is hung has a diameter larger than an idler roll of a steel strip polisher of a transfer destination, and a transfer destination to which a used polishing belt is transferred from a steel strip polisher. 3. A polishing belt changing device for a steel strip polishing machine according to claim 1, wherein said mandrel has a smaller diameter than said idler roll. 4. The apparatus according to claim 1, wherein the mandrel is expandable and contractible in a radial direction by an expansion and contraction mechanism.