JP2010207869A - Roll lifter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform the clamping of the upper part of a chock with a clamp possible without interfering with a chock turning device in a roll lifter having a chock turning device for rotating the chock at the end of a roll shaft is rotated through 90° in the state where a rolling roll is grasped and hung. <P>SOLUTION: This lifter includes: a circular-arcuate rail 17, a hydraulic cylinder 18 for lifting and lowering the rail 17; a movable block 19 which is mounted slidably along the rail 17 by a moving device 21; and a chock holder 22 which is supported ascendably and descendably with the movable block 19 and which is changed to a pressing position where the chock is pressed by being lifted and lowered with the hydraulic cylinder 23 and a retreating position where the chock holder is retreated by being ascended from that position. The circular-arcuate rail 17 is made so as to be lifted and lowered along a vertical line p which is passed through the axial center o of a rolling roll 13 with the hydraulic cylinder 23, its major part is situated on one side across the vertical line p and prevented from interfering with the clamp 41 which clamps the chock 38 by moving vertically. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a roll lifter provided with a chock turning device for rotating a chock attached to a shaft end of a rolling roll by 90 ° from a horizontal position to a vertical position for roll grinding.

  When grinding with a grinding machine with the roll for rolls attached to the end of the shaft, the chock 1 is rotated 90 ° from the horizontal position to make it vertical as shown in FIG. After that, the surface of the roll 4 is ground by the rotating grindstone 3 while being gripped by the clamp 2.

  When rotating a chock as described above, conventionally, the end of the wire drawn from the winch is hung on the chock, and then the wire is wound by the winch, and the work of hooking the wire to the chock is performed manually. For this reason, it was laborious and dangerous.

  In order to save labor when rotating the chock and to ensure safety, a chock turning device is installed in the roll lifter that can be opened and closed and equipped with a roll support arm that grips the roll when closed, and the roll is supported by the roll support arm. Various roll lifters have also been proposed in which the chock is rotated by 90 ° with the chock turning device in a state of being lifted.

  As an example, Patent Document 1 includes a roll support arm that is supported so as to be opened and closed by a beam suspended from a crane, and a chock turning device that rotates the chock while the roll is held by the roll support arm. From the pinion rack mechanism, the chock turning device is fixed to the beam at the center, a semicircular rail straddling the roll, a movable base movably mounted on the rail, and the movable base is moved along the rail Disclosed is a roll lifter composed of a moving device and a choke presser device that is attached to a movable base so as to be able to advance and retreat, and presses a chock when moving forward,

  In Patent Document 2, a center beam of a main beam suspended from a crane has a semicircular fan beam, a rotary drive device that rotates the arm around a rolling roll, and a choke mechanism that engages the fan beam with a chock. There is disclosed a roll lifter provided with a chock turning device that is formed of a combined shoe and is switchable between a position where the engagement shoe is pressed against a chock and a retreat position where the engagement shoe is retreated from the position and released from the chock. .

Microfilm of Japanese Utility Model No. 54-137416 (Japanese Utility Model Application No. 56-55504) Microfilm of Japanese Utility Model No. 60-43478 (Japanese Utility Model Application No. 61-160179)

  At the time of roll grinding, the chock is rotated 90 ° from horizontal to vertical as shown in FIG. 1, and then the rolling roll 4 is applied to the rotating grindstone 3 of the grinder while being held by the clamp 2 and is ground. However, in order to stabilize and ensure the holding by the clamp 2, it is desirable to hold the upper and lower flange portions 1a of the chock 1 with the clamp.

  In the chock turning device provided with the arc-shaped rail as shown in Patent Documents 1 and 2, the center of curvature of the rail is set in accordance with the axis of the rolling roll, and then the chock is pressed by the chock presser. It can be rotated just as it is, and it can be rotated precisely at a predetermined angle. Also, the type that the rail is fixed is the weight of the movable part because the rail does not rotate compared to the type that the rail rotates. In any type, if you try to grip the flange part at the top of the chock with a clamp, the rail will get in the way and the upper part of the chock must be held with the clamp. I can't.

  An object of this invention is to provide the roll lifter provided with the chock turning apparatus which can hold | grip the chock firmly by gripping the flange part of a chock upper part with a clamp.

  The invention according to claim 1 is a state in which a beam suspended from a crane, a pair of roll support arms supported so as to be openable and closable along the beam, and a rolling roll held by the roll support arm and suspended. In the roll lifter having a chock turning device for rotating the chock at the end of the roll shaft, the chock turning device positions the center of curvature on a vertical line passing through the axis of the rolling roll held by the roll support arm and lifted. And a substantially semicircular arc that is arranged mostly or entirely on one side of the vertical line and can be lifted and lowered without interfering with a clamp for gripping a chock arranged on the other side of the vertical line With the rail and the pair of roll support arms gripping and lifting the rolling roll, the center of curvature of the rail follows the vertical line. Lifting device for moving up and down, movable base movably mounted on the rail, a moving device for moving the movable base along the rail, a chock presser attached to the movable base so as to advance and retreat, and the chock It is characterized by comprising an actuating device that advances and retracts the presser and presses the chock when moving forward.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, a control device is provided for controlling the lifting device such that the center of curvature of the arc-shaped rail coincides with the axis of the rolling roll. .

According to the first aspect of the invention, the arc-shaped rail can be moved up and down without interfering with the clamp provided for gripping the longitudinal chock by having a substantially quarter-circular shape. Without interfering, it is possible to grip the flange portion at the top of the chock that is vertically oriented, or the flange portion above and below the chock.
According to the invention concerning Claim 2, centering which makes the curvature center of an arc-shaped rail and the axis of a roll for rolling match can be performed automatically with high accuracy.

The figure which shows the prior art example which hold | gripped the chock in the vertical orientation. The front view of the roll lifter concerning this invention. The same side view. The rear view of the raising / lowering apparatus of an arc-shaped rail. The side view of a chock presser and its operating device. The figure which shows the state which pressed the chock with the chock presser. The figure which shows the state rotated 90 degrees, pressing a chock with a chock presser. The front view which shows the clamp mechanism of a chock.

Hereinafter, a roll lifter according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 2 is a front view of a roll lifter according to the present invention, and FIG. 3 is a side view thereof. The main beam 11 is suspended by a hook of a crane, and is supported on both sides of the main beam 11 at right angles to the main beam 11. A sub-beam 12 that opens and closes in the direction of the arrow in FIG. 2 via a screw shaft that is rotationally driven by a motor (not shown), and a screw shaft that is supported on both sides of each sub-beam 12 and that is also rotationally driven by a motor (not shown). Through a hook-shaped roll support arm 14 that opens and closes in the direction indicated by the solid line or the alternate long and short dash line in FIG. 3 and grips the rolling roll 13 when closed, and a chock turning device 15 supported at both ends of the main beam 11. It has become.

The sub beam 12 described above may be fixed without being opened and closed, and may be moved along the main beam 11 in accordance with the position of the center of gravity of the rolling roll 13 on which the hanging metal fitting 16 is lifted.
Next, the chock turning device 15 supported on both sides of the main beam 11 will be described. Since this chock turning device 15 has the same structure on the left and right, only one chock unfolding device 15 will be described below.

  The chock turning device 15 includes an arc-shaped rail 17, a hydraulic cylinder 18 that is attached to the main beam 11 and moves up and down the arc-shaped rail 17, and a wheel (not shown) that travels on the rail 17. A movable base 19 that is slidably mounted along the rail 17, a moving device 21 that slides the movable base 19 along the rail 17, and a chock presser 22 that is attached to the movable base 19 so as to be able to advance and retreat (hereinafter referred to as a “holding base”) As shown in the embodiment, when the movable base 19 is positioned at the upper end of the rail and moves forward and backward, it is attached to the movable base 19 so that it can be raised and lowered). It consists of a hydraulic cylinder 23 as a pressing operation device, and will be described in detail below in order.

  The arc-shaped rail 17 is positioned on the vertical line p passing through the axis o of the rolling roll 13 held at the center of curvature by the pair of roll support arms 14, and along the vertical line p by the hydraulic cylinder 23. The most part is located on one side (right side in FIG. 3) sandwiching the vertical line p, and a part of the semicircular shape slightly protrudes on the other side (left side in FIG. 3). It has a slightly longer, almost quarter circle.

  As shown in FIG. 4, a block 25 is fixed to the back surface of the arc-shaped rail 17, and a pair of guide rods 26 are arranged in parallel on the block 25 so that each guide rod 26 can slide on the main beam 11. The above-described lifting and lowering of the arc-shaped rail 17 is guided by being inserted into the lower surface of the block, and a distance to the shoulder portion 13a (see FIGS. 6 and 7) of the rolling roll 13 is set on the lower surface of the block. A laser distance meter 27 for measurement is attached.

  The hydraulic cylinder 18 for raising and lowering the arc-shaped rail 17 is connected to the block 25 between the guide rods, and the arc-shaped rail 17 is moved up and down via the block 25 by the advance and retreat of the rod. In addition, as a raising / lowering device which raises / lowers the rail 17, things other than the hydraulic cylinder 18, for example, a pinion rack mechanism etc., can also be used.

As described above, the movable base 19 is slidably mounted on the rail 17 along the rail 17.
As shown in FIG. 3, the moving device 21 for moving the movable table 19 is disposed on the inner peripheral side of the rail 17, and both ends of the moving device 21 are fixed to the rail 17. The sprocket 33 is rotationally driven, and a guide sprocket 34 that is pivotally supported on both sides of the sprocket 33 and meshes with the chain 31. The movable table 19 is moved along the rail 17 along the rail 17 by the forward or reverse rotation of the sprocket 33. Is moved in the clockwise or counterclockwise direction in FIG. As a moving device for moving the movable base 19, in addition to the device configured as described above, for example, an arc-shaped rack disposed along the rail 17 and a pinion that is rotationally driven by a motor and meshes with the rack. A pinion rack mechanism can also be used.

  As shown in FIG. 6, the chock presser 22 has a guide rod 35 that is attached to the movable table 19 so as to be movable up and down, and is connected to a rod 37 of a hydraulic cylinder 23 that is supported by the movable table 19. Has been. As the actuating device, a mechanism other than the hydraulic cylinder 23, for example, a link mechanism or a pinion rack mechanism may be used.

  The chock turning device 15 is configured as described above. When the chock 38 at the shaft end of the rolling roll 13 held by the roll support arm 14 is rotated 90 ° from the horizontal state shown in FIG. Centering is performed so that the center of curvature of the rail 17 coincides with the axis o shown in FIG. 3 of the rolling roll 13 held by the roll support arm 14. This centering is performed as follows. That is, the distance to the shoulder 13a of the rolling roll 13 is measured by the laser distance meter 27 shown in FIG. 4 while the arc-shaped rail 17 is lowered by the hydraulic cylinder 18, and is output to a control device (not shown). The control device calculates the distance to the axis o of the rolling roll 13 from the radius of the shoulder 13a and the measured value obtained in advance from the type of rolling roll to be ground, and the distance is also obtained in advance. The rail 17 is lowered until it coincides with the distance between the laser distance meter 27 and the center of curvature of the rail 17. When both distances coincide with each other, the hydraulic cylinder 18 is controlled and the descent of the rail 17 is stopped.

  When the center of curvature of the arc-shaped rail 17 coincides with the axis o of the rolling roll 13 as described above and the centering is performed, the control device controls the hydraulic cylinder 23 and lowers the chock presser 22. When the chock presser 22 descends and presses the chock 38 (FIG. 6), the control device then drives the motor 32. Thereby, the sprocket 33 is rotationally driven in the forward direction, and the movable base 19 is slid along the rail 17 in the clockwise direction of FIG. Along with this, the chock 38 pressed against the chock presser 22 also rotates. When the movable table 19 reaches the end of the rail, the chock 38 is oriented vertically as shown in FIG. 7 and the control device stops the motor 32.

When the movable base 19 moves on the rail while being suspended by the crane and reaches the end of the rail, the position of the center of gravity changes, and the sub beam 12 shown in FIG. In order to prevent the movable base 19 from tilting even if it moves along the rail 17, a sensor for detecting the tilt of the sub beam 12, such as a gyro sensor, is provided, and a balance weight is mounted on the sub beam, and is detected by the sensor. It is desirable to provide an automatic aligning device that adjusts the balance by moving the balance weight according to the tilt.
The vertically oriented chock 38 is then gripped by a clamp mechanism 41 shown in FIG.

  The clamp mechanism 41 has a known structure, and includes an upper clamp 43 and a lower clamp 44 mounted on a base 42 having a substantially L shape in a side view. The upper clamp 43 is pivotally supported on the upper portion of the base 42. An arm 45 to be rotated, and a hydraulic cylinder 46 controlled by the control device, wherein the arm 45 is swung to switch between a standing up non-use position shown by a solid line in FIG. 8 and a sideways use position shown by a one-dot chain line; The arm 45 has a gripping piece 47 which is moved back and forth along the arm 45 by a hydraulic cylinder (not shown) which is also controlled by the control device and can be switched between a forward gripping position and a retracted retracting position. The above-described rail 17 moves up and down in a state where it is switched to the non-use position shown by a solid line in FIG. 8, and the grip piece 47 is moved in a state where the arm 45 is switched to the use position. When switched to the lifting position, it has a protrusion 48 cooperating with the chocks 38 upper flange portion 38a which is projected laterally from the base 42 as sandwiching and gripping from both sides.

  The lower clamp 44 is attached to the lower portion of the base 49 and is protruded from the side of the base 49. The grip piece 50 is switched between a forward position and a backward position by a hydraulic cylinder (not shown) built in the base 49. And by controlling the hydraulic cylinder by the control device and switching the gripping piece 50 to the forward position, the flange portion 38b at the lower portion of the chock is sandwiched in cooperation with the projecting piece 51 projecting laterally from the base 42. It is designed to grip.

The grip 41 is held by the clamp 41 as follows.
When the movable base 19 reaches the rail end shown in FIG. 8 and the chock 38 is oriented vertically, the control device stops the motor 32 as described above, and stops the movable base 19 by stopping at the rail end. When the motor 32 is stopped, the apparatus controls the hydraulic cylinder for the gripping piece 50 to move the gripping piece 50 leftward in the figure. And the flange part 38b of a chock lower part is hold | gripped with the protrusion 51 projected from the stand 42, and rotation of the chock 38 is performed. The rotation prevention of the chock 38 may be performed by providing a support that can be moved up and down on the base 42 and applying the support to the flange portion 38a from below.

  After the rotation of the chock 38 is stopped, the control device controls the hydraulic cylinder 18 and raises the rail 17 to the upper limit position. Thereafter, the control device controls the hydraulic cylinder 46 for turning the arm to turn the arm 45 in the clockwise direction in the drawing to the use position.

  Thereafter, the limiting device controls the hydraulic cylinder for the gripping piece 47, advances the gripping piece 47 along the arm 45 in the direction of the arrow in the figure, switches to the forward position, and the flange portion 38a on the upper portion of the chock is projected from the base 42. Gripping in cooperation with the protruding piece 48.

  After the chock 38 is gripped by the clamp 41 as described above, the rolling roll is applied to the rotating grindstone 3 of the grinding apparatus shown in FIG. 1 and surface grinding is performed.

  In the roll lifter of the above-described embodiment, the arc-shaped rail 17 is substantially a quarter circle, and the clamp 41 is switched to a non-position that does not interfere with the arc-shaped rail 17 that moves up and down the arm 45 in the non-use position. Can switch the arm 45 to the use position and grip the upper and lower flange portions of the vertically oriented chock 38, measure the distance to the shoulder 13 a of the rolling roll 13 with the laser distance meter 27, and roll the rolling roll 13. By obtaining the distance to the axis o, the arc-shaped rail 17 can be centered automatically and accurately.

  In the above embodiment, the chock presser 22 descending from the movable table 19 at the upper end of the rail presses the chock 38 from the upper side and turns 90 ° in the clockwise direction. However, as shown in FIG. It is also possible to hold the chock 38 from the side by the chock presser 22 that advances and retreats from the movable table 19 to the side, and turns it 90 ° counterclockwise to make the chock 38 in the vertical direction. In this case, the rolling roll 13 is applied to the rotating grindstone of the grinding machine from the opposite side.

  The clamp 41 of the embodiment is configured to grip the upper and lower flange portions 38a and 38b of the chock 38, but omits the lower clamp 44 and does not have a support for stopping the rotation of the chock 38 described above. The flange portion 38a of the chock 38 may be gripped only by the upper clamp 43.

11, main beam 12, sub beam 13, roll 14 for rolling, support arm 15, chock swivel 16, suspension bracket 17, arc-shaped rails 18, 23, 46, hydraulic cylinder 19,・ Moveable base 21 ・ Movement device 22 ・ Cock presser 25 ・ Blocks 26 and 35 ・ Guide rod 27 ・ Laser rangefinder 31 ・ Chain 32 ・ Motor 33 ・ ・ Sprocket 38 ・ ・ Chock 41 ・ ・ Clamp Mechanism 42 ··· Base 43 ··· Upper clamp 44 · · Lower clamp 45 · · Arm 47, 50 · · Grasp piece 48 and 51 · · Projection piece 49 · · Base

Claims (2)

  A beam suspended from a crane, a pair of roll support arms supported so as to be openable and closable along the beam, and a roll chock at a roll shaft end is rotated while the rolling roll is held and suspended by the roll support arm. In the roll lifter having a chock turning device, the chock turning device has a center of curvature positioned on a vertical line passing through the axis of the roll for rolling held by the roll support arm and sandwiches the vertical line. A substantially quarter-circular arc-shaped rail that is arranged mostly or entirely on the side and that can move up and down without interfering with a clamp for gripping a chock disposed on the other side across the vertical line, and the pair of roll supports A lifting device that lifts and lowers the rail so that the center of curvature is along the vertical line in a state where the roll is held and lifted by an arm, A movable base that is movably mounted on the rail, a moving device that moves the movable base along the rail, a choke presser that is movably attached to the movable base, and advancing and retreating the chock presser to move forward A roll lifter characterized by comprising an operating device for pressing a chock at a time.   The roll lifter according to claim 1, further comprising a control device that controls the lifting device so that a center of curvature of the arc-shaped rail coincides with an axis of a rolling roll.