JPH06271274A - Lifting jig for self-aligning roll - Google Patents

Abstract

PURPOSE:To carry out an automatic correction for the dislocation of a roll at the time of lifting by providing both ends of a lifting tool body frame with a lifting arm driving mechanism using the principle of a parallel link mechanism, and energizing a pair of lifting arms with a spring along a direction for causing the arms to come near each other. CONSTITUTION:A roll 19, when lifted, is located between lifting arms 11 and 11a, and a motor-driven cylinder 5 is actuated. The right and left cylinders 11a and 11 are thus shifted inward via a seesaw lever 7, connection rods 14 and 14a and a parallel link mechanism section 10. In this case, if the roll 19 is slightly dislocated toward the arm 11, the engagement claw 20 of the arm 11 first comes in contact with one end of the roll 19 and, then, the engagement claw 20a of the arm 11a comes in contact with the other end of the roll 19. Consequently, energy is accumulated in a spring coupled to each end of the connection rods 14 and 14a, according to the time lag of the contact. When a lifting tool is elevated in this state, both arms 11 and 11a oscillate, due to the accumulated energy of the spring, and the center of the lifting tool conforms with the axial center of the roll 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-centering roll hanger which can automatically match the axial center of the roll with the center of the hanger body when hoisting the roll. In particular, the present invention, for example, suspends two rolls that are displaced from each other in the axial direction of the roll in a state in which the displacement is eliminated, or suspends the two rolls on the pedestal with their axial center positions aligned. The present invention relates to a self-centering roll hanger that can be lowered and that can stabilize the roll cargo handling work.

[0002]

2. Description of the Related Art As a roll suspension for suspending a roll at both ends thereof, a pair of suspension arms are suspended from a horizontal suspension main body suspended by a crane or the like, and the roll is suspended at the lower end of the suspension arm. There is a type in which an eye end for loosely inserting the shaft neck portion is formed and a grip claw type for gripping the roll shaft neck portion at the lower end of the suspension arm. In the latter case, the gripping pawl is further divided into a type that opens and closes in the roll radial direction with respect to the roll shaft neck, and a concave fixed pawl type that forms the center of the gripping claw to support the lower surface of the roll shaft neck. To be In the above-mentioned eye-end type and the above-mentioned concave fixed claw type lifting device, a feed screw is provided on the lifting device body, and a nut portion that is screwed with the feeding screw is fixed to the hanging arm side, and during lifting work, a crane screw is used. After the suspension main body is brought to the upper center position of the suspended roll by running, the pair of suspension arms is moved to the suspended roll side by this screw feed mechanism, and the suspended roll is lifted by the fixed claw at the lower end of the suspension arm. Normally, the left and right suspension arms move in the direction of moving toward and away from each other (when the roll is removed), so in order to hang the roll in a well-balanced manner, adjust the position of the crane that suspends the suspension device to adjust the suspension device body. The center of is aligned with the axial center of the roll.

Further, in the case of transporting a rolling roll in a steel mill or the like, conventionally, in order to eliminate the time loss of the transporting work, one in which two eye ends are vertically formed at the lower end of each suspension arm or a large lower end is formed. There is known a structure in which a slide plate having two small-diameter roll insertion holes in and out from a large-diameter eye end portion is provided on a suspension arm and has both a single-suspending function and a double-suspending function.

[0004]

In the conventional roll hanger, both the eye end type and the gripping claw type are hung on the crane side to position the center of the hanger body at the axial center of the hanging roll. It is necessary to adjust the position of the tool body, and the adjustment and alignment operations are extremely complicated and hinder work efficiency. If the suspension arm is forcibly pressed in the misaligned state, there is a risk that the suspension roll slips in the axial direction on the pedestal on the ground to cause damage.

When the left and right suspension arms can be independently moved with respect to the suspension body, even if the suspension body is slightly deviated from the center of the suspended roll on the pedestal, the two suspension arms can be individually separated. The suspended roll can be hung by moving it by the required amount, but in the hung state the roll is displaced from the lifting device body to one side, so the lifting device body is not stable and it is extremely dangerous during lifting work. . Moreover, in the case of an automatic crane or the like, even if the crane is accurately positioned, the roll cannot be placed at the correct position if the roll is displaced with respect to the hanger.

In the case of two rolls hanging, when the two rolls are axially displaced on the roll pedestal, there is a danger that one roll may fall off during the lifting and cause a serious accident. However, there is an inconvenience that it is necessary to realign the suspended rolls on the roll cradle before starting the suspension work.

Therefore, the present invention provides a self-centering roll hanger in which the roll misalignment is naturally corrected when hoisting even if the roll and the hanger body are slightly misaligned in the roll axial direction. To aim.

Another object of the present invention is, for example, when two hanging rolls are placed on a pedestal while being axially displaced from each other.
When two rolls are lifted at the same time, both rolls can be naturally aligned with the center of the lifting device body, and the two rolls can be hung on the pedestal in the axially aligned state. An object is to provide a hanging tool for a heart-shaped roll.

[0009]

A suspender for a self-aligning roll according to the present invention comprises a parallel link mechanism mounted on both ends of a suspender body frame so as to be movable in mutually facing directions. A suspension arm drive mechanism, a vertical suspension arm connected to each of the parallel link mechanisms, and having a roll locking claw at the lower end, and a suspension arm drive mechanism provided in the suspension arm drive mechanism, and a direction in which a pair of suspension arms approach each other. It has a pair of springs for urging the roll locking claw and a limit switch for detecting the engagement between the roll locking claw and the suspended roll.

When two suspended rolls are suspended with their centers aligned in the axial direction, the self-centering roll suspenders are provided in parallel on one suspender body frame.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a suspender for a self-centering roll according to an embodiment of the present invention. The hoist body frame 1 is suspended from a trolley on a crane (not shown) via a wire rope 2, and is lifted and lowered by a hoist on the trolley. The guide post 3 hangs down from the trolley, and the guide roller 4 provided on the suspender main body frame 1 comes into contact with the side portion of the guide post 3 and rolls, thereby preventing the suspension main body frame 1 from rocking during vertical movement. I am trying. A motor cylinder 5 serving as a drive source for a suspension arm, which will be described later, is pivotally attached to the lower surface of the suspension main body frame 1.
A seesaw lever 7 is pivotally attached to the center of the lower surface of the through a bracket 6. One end of the seesaw lever 7 is connected to a piston rod of the motor cylinder 5 via a convex portion 8 protruding toward the motor cylinder 5 side. The convex portion 8 is necessary when the seesaw lever 7 has a large swing angle and there is a risk that the seesaw lever 7 and the piston rod tip of the motor cylinder 5 interfere with each other. May be directly connected to one end of the seesaw lever 7.

In this embodiment, two parallel swinging link members 12 and 12 are provided at both ends of the suspension main body frame 1, respectively.
a and 13, 13a are hung, and horizontal link members 9, 9a parallel to the main body frame 1 are connected to their lower ends. The parallel link mechanism portions 10 and 10a are formed by these members. A pair of suspension arms 11, 11a extending vertically downward are fixed to the horizontal link members 9, 9a. Seesaw lever 7
The one end of the seesaw lever 7 is connected to one (outer side) of the remaining two parallel swing link members 12 and 13 of the one parallel link mechanism portion 10 via a connecting rod 14, and the other end of the seesaw lever 7 is the other end. The two parallel swing link members 12a and 13a in the parallel link mechanism portion 10a are connected to one (outside) of the parallel link mechanism portion 10a via the other connecting rod 14a. The pair of connecting rods 14, 1 extending from the position of the seesaw lever 7 to both sides.
4a are equal in length to each other, and therefore the seesaw lever 7 and the pair of connecting rods 14 and 14a constitute a Z link mechanism.

Referring to FIG. 2, the tip ends of the connecting rods 14 and 14a are one of the parallel swing link members 13 and 13a.
Crosshead 1 pivotally attached to the pin via pins 15 and 15a
6 and 16a, and nuts 17 and 17a screwed to the tips of the connecting rods 14 and 14a and the cross head 16,
The springs 18 and 18a are mounted between the springs 16a and 16a, respectively, and the connecting rods 1 are connected via the springs 18 and 18a.
4, 14a and the parallel link mechanism unit 1 on the side corresponding to these
0 and 10a are connected. Springs 18, 18
Both strengths of a are the same. Hanging arm 11, 11a
L-shaped locking claws 20 and 20a that are in contact with the outer end surface of the hanging roll 19 and support the roll 19 from below are fixed to the lower end of the. In FIG. 1, a pair of suspension arms 11, 11
After the hanging tool main body frame 1 is lowered from above the hanging roll 19 with the interval of a being widened, and the hanging roll 19 is inserted between the ends of both the hanging arms 11 and 11a, the motor cylinder 5 is operated. Both the connecting rods 14 and 14a on both sides are moved inward (toward the hanging tool center) via the seesaw lever 7. By the inward movement of the connecting rods 14 and 14a, the parallel swing link members 13 and 13 of the parallel link mechanism portions 10 and 10a are moved.
a swings in the same direction via springs 18 and 18a,
The respective suspension arms 11 and 11a approach each shaft end side of the suspended roll 19 in a vertical state, and the respective L-shaped locking claws 20 at the lower end of the suspension arm,
After the inner surface of 20a comes into contact with the roll shaft end, the hanging tool main body frame 1 is raised, whereby the hanging roll 19 is supported from below by the L-shaped locking claws 20 and 20a and is lifted. A limit switch (described later) for detecting that the inner side surface of each L-shaped locking claw 20, 20a is in contact with the shaft end of the suspended roll 19 is provided at the lower end of each suspension arm 11, 11a. When the hoisted roll is lowered to the ground, the motor cylinder 5 is operated in the reverse direction to connect the connecting rods 14 and 1.
At the front shoulder of 4a, the parallel swing link members 13, 13a are swung outward through the crossheads 16, 16a to open the suspension arms 11, 11a and remove the L-shaped locking claws 20, 20a from the roll. .

The above is the suspending operation when the axial center of the suspended roll coincides with the center of the spacing between the left and right suspension arms. In the present invention, the axial center C of the suspended roll and the suspension arm 11, Even when the center S of the gap of 11a is displaced as shown by the symbol E in FIG. 2, it can be effectively lifted,
In addition, the centers of the two are automatically aligned when they are lifted. This operation will be described with reference to FIGS. First, as described above, the lifting tool body frame is lowered so that the suspended roll 19 is inserted between the suspension arms 11 and 11a, and the left and right suspension arms 11 and 11a are moved to the suspended roll 19 side by the operation of the motor cylinder. 2A, the L-shaped locking claw 20 of one of the suspension arms 11 comes into contact with the shaft end of the suspended roll 19 first (operation of the suspension arm 11 side limit switch), as shown in FIG. 2A. . When the operation of the motor cylinder is further continued from now on, the one suspension arm 11 and the parallel swing link member 13 of the parallel link mechanism portion 10 corresponding to the one suspension arm 11 do not move due to the contact with the suspended roll 19, so that FIG. As shown in b), the spring 18 between the one connecting rod 14 and the parallel swing link member 13 is compressed to move the connecting rod 14 inward, and the other suspension arm 11
a and the parallel swing link member 13a of the parallel link mechanism portion 10a corresponding thereto move inward together with the other connecting rod 14a via the spring 18a, and the L-shaped locking claw 20a at the lower end thereof is It contacts the shaft end of the suspension roll 19 (the limit switch operation on the suspension arm 11a side).

The motor cylinder is stopped when both limit switches are activated. Both L
If there is a slight delay until the motor cylinder stops after the shape locking claws 20 and 20a come into contact with the suspended roll shaft end, during that time, the connecting rods 14 and 14a move to the springs 18 and 18, respectively.
While continuing to move inward while compressing a, the connecting rod 1
4, 14a front shoulders and parallel swing link members 13, 13
There is a gap e, d between the cross head 16a
Occurs. This is the state shown in FIG. The strength of the springs 18 and 18a is set such that the pressing force of the L-shaped locking claw 20 or 20a at the shaft end of the suspended roll 19 causes the suspended roll 19 on the roll holder to slide in the axial direction. The roll bearing portion of the L-shaped locking pawls 20 and 20a is kept on the suspended roll shaft so as not to damage it and until the inner surface of the L-shaped locking pawls 20 and 20a comes into contact with the shaft end of the suspended roll 19. It is set within a certain range so that the peripheral portion of the end is easily slipped and the suspended roll 19 is surely placed on the support portion. As an example, it is preferable to adjust the strength of both springs 18 and 18a to about 5% of the weight of the suspended roll 19.

The state of FIG. 2B or the state of FIG.
In the state of (c), the hanging tool body frame is lifted. When the suspended roll 19 is separated from the roll cradle, the lifting tool loses the reaction force from the roll cradle side against the pressing force of the springs 18 and 18a, and the suspension arms 11 and 11a and As shown in FIG. 3, the roll moves in a direction in which there is no deviation from the center of the suspender body frame, and the center S of the suspender body frame and the axial center C of the roll coincide with each other.

4 and 5 are a front sectional view and a side view showing a limit switch mechanism provided on the suspension arm 11a. Note that FIG. 4 is a sectional view taken along the line AA of FIG. A pair of vertically spaced parallel links 21 and 22 are pivotally attached to the lower end of the suspension arm 11a, and an L-shaped operation link 23 is vertically connected to the tips of the links 21 and 22. A switch actuating lever 25 is fixed to a pivot 24 of the upper parallel link 21, and a limit switch 26, which comes into contact with and is turned on when the switch actuating lever 25 is erected upward, is attached to the suspension arm 11a. Has been. The L-shaped actuating link 23 descends by its own weight except when the roll is suspended, and when the suspension arm 11a approaches the suspension roll and the locking claw 20a supports the shaft end of the suspension roll 19, L-shaped end 2 at the bottom of the link 23
3a abuts on the shaft end of the suspended roll 19, and the L-shaped actuating link 23 swings upward while keeping the vertical state by the parallel links 21 and 22 to rotate the pivot 24 of the upper parallel link 21 to activate the switch. The lever 25 is raised and the limit switch 26 is turned on. A similar limit switch mechanism is also provided on the other suspension arm 11 side. Since the entire switch mechanism is arranged along the suspension arms 11 and 11a and has no large lateral projection, there is no danger of hitting an external object during the suspension work and the safety of the suspension work can be improved. However, the present invention is not necessarily limited to the switch mechanism having the above-described structure, and any other type of switch mechanism may be used as long as it can reliably detect that the roll locking claw has supported the suspended roll. Further, the motor cylinder 5 may be a hydraulic cylinder. The mounting positions of the springs 18 and 18a are not necessarily limited to the positions of the above-described embodiment, and each connecting rod may be of a telescopic type and the spring may be provided at this portion.

FIG. 6 is a side view of a suspender for hanging two self-centering rolls according to an embodiment of the present invention. In this embodiment, two self-centering type suspenders 27 and 28 for single suspension shown in FIG.
It is an example provided in. The self-centering type suspenders 27 and 28 are provided with motor cylinders 30 and 31, respectively, and limit switch mechanisms 34, which confirm the support of the suspended roll, respectively.
35, and can be independently suspended. Therefore, the hanging device for two hangings can be used as one hanging by operating only one of the motor cylinders 30 or 31. When the two hung rolls 32 and 33 are placed on the pedestal while being axially displaced from each other, when they are hoisted by the respective self-centering type hangers 27 and 28, as shown in FIG.
The suspended rolls 32 and 33 are automatically centered to the center of the suspension main body frame 29 by the operation described with reference to FIG. 4, whereby stable suspension work is performed, and the two rolls are aligned to each other. You can drop it in place.

[0019]

As described above, according to the present invention, even if the lifting operation is started in a state where the main body frame of the lifting tool is displaced from the axial center of the hanging roll, the lifting tool is automatically lifted when hoisting. The center of the roll and the center of the roll are aligned to provide a stable lifting operation. Since the center of the hanging roll is on the center of the hanging tool body frame even when hanging down, it is easy to place the roll accurately at a predetermined position. Also, in the case of a structure for hanging two rolls, if two rolls that are axially displaced are lifted as they are, both rolls are automatically aligned with the lifting tool, and stable lifting work is performed. It is possible to drop the book rolls in an aligned state, and it is possible to save the trouble of aligning the rolls when hanging the rolls and after the rolls are dropped. The structure is simple and there is no part that protrudes outwardly, and there is an effect that a safe roll hanging work can be performed.

[Brief description of drawings]

FIG. 1 is a front view of a self-centering roll hanger according to an embodiment of the present invention.

FIG. 2 is a diagram showing a centering operation during a suspending operation of a roll suspender according to the present invention.

FIG. 3 is a schematic front view showing a state in which the center of the roll suspender according to the present invention and the center of the suspended roll coincide with each other.

FIG. 4 is a front sectional view of a limit switch mechanism applied to the present invention.

5 is a side view of the limit switch mechanism shown in FIG. 4. FIG.

FIG. 6 is a schematic side view of a lifting device for hanging two self-centering rolls according to an embodiment of the present invention.

[Explanation of symbols]

 1,29 Lifting tool body frame 5 Motor cylinder 7 Seesaw lever 10,10a Parallel link mechanism part 11,11a Hanging arm 14,14a Connecting rod 18,18a Spring 19 Suspended roll 20,20a L-shaped locking claw 26 Limit switch 27 , 28 Self-centering type suspension

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshio Amano 3434 Shimada, Hikari-shi, Yamaguchi Prefecture, Shinko Nippon Steel Co., Ltd., Hikari Steel Co., Ltd. Heavy machinery industry Co., Ltd. Niihama Works

Claims (2)

[Claims] 1. A suspension arm drive mechanism comprising parallel link mechanisms mounted on both ends of a suspension main body frame so as to be movable in mutually facing directions, and a lower end connected to each parallel link mechanism. A vertical suspension arm with a roll locking claw on the suspension arm drive mechanism,
A self-aligning roll having a pair of springs for urging the pair of suspension arms toward each other and a limit switch for detecting engagement between the roll locking claw and the suspended roll. Hanging equipment. 2. The hoisting arm drive mechanism comprises a seesaw lever pivotally mounted to the hoist body frame, a pair of parallel link mechanism parts pivotally attached to both ends of the hoist body frame, and the seesaw lever. And a pair of connecting rods that connect the ends of the seesaw lever and the pair of parallel link mechanism portions via the springs, and the pair of connecting rods include the springs. Axially movable with respect to the pair of parallel link mechanism parts, the suspension arm is hung vertically from a horizontal link member of the pair of parallel link mechanism parts, and a roll pressing force of the suspension arm is provided. The suspending tool for a self-aligning roll according to claim 1, wherein is provided by axial movement of the pair of connecting rods via the spring.