JPS6320701Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to an automatic slinging device for slinging an object by remote control.

Prior Art Conventionally, in order to suspend and move an object such as a long shaped steel using a crane or the like, the object is placed on a rootstock, and the object is manually slinged by passing a wire or the like through the gap between it and the installation surface. The main method used has been to lock the machine to a crane hook and lift it up using a crane. This method requires labor and time because it requires manual labor, and also has the problem that workers may be harmed when the load collapses or objects fall.

In order to solve the problems associated with such manual slinging, the following slinging device has been proposed.
That is, in a gate-shaped frame in which two arms are vertically disposed at both ends of the beam, the first arm accommodates a wire for slinging, the second arm accommodates a long wire drawing member, and the wire drawing member is placed in the first arm. After the member is fed out from the second arm toward the first arm through the lower part of the object and engaged with the tip of the sling wire, the wire drawing member is pulled back to cause the sling wire to be attached to the first arm. After reaching the object, slinging the object by connecting its tip to the first arm, and lifting and moving the object,
This device performs the operation of unfastening the wire tip and pulling the wire back to the second arm. As the wire drawing member, a steel band with an arcuate cross section should be used so as not to sag during drawing out, or a non-bend back chain should be used which bends in one direction but not in the other. was proposed (Japanese Unexamined Patent Publication No. 53-7066,
(Refer to Japanese Patent Application Laid-open No. 126663/1983). These slinging devices require two-step operations: feeding out and pulling back the wire pulling member, and feeding out and pulling back the slinging wire, so the slinging operation takes time and requires a drive device corresponding to each operation.
Locking (wire pulling member and wire, wire and second
This necessitates a device for releasing the arm) and a device for releasing the arm, resulting in a complicated structure.

Purpose of the invention This invention solves the problems of these conventional techniques,
The purpose of the invention is to provide an automatic slinging device that can easily and safely perform slinging in a short time and has a relatively simple structure. a substantially horizontally extending support beam that is raised and lowered; 1 with a notch to allow the chain to sag when
a pair of arms, and a sling chain device that lets out a sling chain from the first arm of the arm and hooks the chain to the second arm, and the sling chain device is configured to move from a linearly extending position to a sling chain device. a non-bend bag chain that can be bent only in a direction, and is accommodated in the first arm so that the bendable direction is upward when it is paid out from the arm; The guide device is provided at the lower part of the arm of the chain, and is movable forward and backward substantially perpendicularly to the chain from the side, and supports the chain from below in the forward position to guide the chain. The guide device has a guide shoe that guides the second arm toward the lower part thereof and releases contact with the chain at the retracted position; and a guide shoe that is attached to the first arm and that is attached to the guide device for extending and retracting the chain. A chain drive device that sends or pulls back the chain from above; and a chain drive device that is provided at the bottom of the second arm and that engages with the tip of the chain that has been paid out from the first arm and has reached the bottom of the second arm. This is achieved by an automatic slinging device characterized in that it is equipped with a chain locking device that holds the end of the chain rotatably around the horizontal shaft and releases the engagement as necessary. Ru.

The arm devices may be movably attached to the support beam so that they can move toward and away from each other on the support beam. Further, it is preferable that the hanging posture of the arm in the arm device is adjustable along the rotation direction by adjusting the spring force of the spring device.

Embodiments Examples of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows the automatic slinging device 1 connected by a main beam A and suspended from a hook B, and FIG. 2 shows a front view of the automatic slinging device 1. As shown in the figure, the automatic sling device 1 includes a support beam 2 extending substantially horizontally, a pair of arm devices 3 attached to the support beam 2, and a sling chain device 4 attached to the arm device 3. ing. The support beam 2 has a rectangular parallelepiped shape with the lower side open for attachment of the arm device 3, has an arm moving device 20 inside, and is connected to the main beam A at the upper side and connected to other support beams. The arm moving device 20 includes a rotating rod 200 extending in the longitudinal direction of the support beam 2 and having opposite threads on both sides.
and a rod drive device 201 for driving and rotating the rod 200. The arm device 3 includes an arm 30 extending downward from the support beam 2;
It has a spring device 31 acting on the spring.
The arm 30 has a hollow rectangular parallelepiped arm body 300.
A, 300B and arm body 300A, 300B
and an arm support 301 that connects the rod 200 of the support beam 2 to the rod 200 of the support beam 2. Arm body 300
In A and 300B, openings 3001A and 3001B through which the chain passes are provided at the lower side surfaces facing each other, and the lower surface is cut out to allow the chain to hang down. The arm support 301 has a central portion 3010
extends into the support beam 2 and is supported by being screwed onto the rod 200, and as the rod 200 rotates forward and backward, a pair of arm supports 301 move toward and away from each other, and both ends extend downward. hanging part 301
1. Arm body 300A, 300B
is connected to the arm support 301 by a pin 3000, and is rotatable so that the lower ends of the pair of arm bodies 300A and 300B can approach and separate from each other. The spring device 31 is connected to the arm support 30
The spring 311 has one end supported by the bolt 310, and a pair of bolts 310 screwed into threaded holes in each of the hanging parts 3011 at both ends of the main body and the two support plates 3012 at the center. Arm body 30
The two side walls of 0A and 300B are each a hanging part 301
A bolt 310 is loosely passed between the arm body 300 and the support plate 3012 and is pressed from both sides by a pair of springs 311.
A and 300B maintain balance so as to have a constant hanging posture. The sling chain device 4 includes a non-bend back chain 40 housed in a first arm body 300A of a pair of arm bodies, a guide device 41 provided at the lower end of the first arm body 300A, and an arm body 300A. The chain drive device 42 attached to the second arm body 300B
The chain locking device 43 is provided at the lower end. As shown in FIGS. 3 and 4, the non-bend back chain 40 prevents the chain from bending in one direction by abutting the end surfaces of adjacent link elements 400 with each other, and maintains a linearly extending posture. The pins 401 can be bent only in one direction, and each pin 401 projects laterally to guide the chain when it is fed out. A locking ring 402 having a through hole in a direction perpendicular to the plane along the bending movement is provided at the tip of the chain 40. The link element 400 may have various shapes other than those shown in FIGS. 3a, b, and c. The chain 40 is housed in a folded state along the longitudinal direction of the arm body 300A so that the bendable direction faces upward when the chain 40 is paid out from the arm body 300A. The guide device 41 is shown in FIG.
As shown in FIGS. 6 and 7, the chain 40 sent from above is turned approximately 90 degrees and moved to the second
A pair of arc-shaped guide shoes 410 that guide toward the arm body 300B, and a chain 4
a pair of support plates 411 that are disposed within the arm body 300A at intervals that form a passage 413 of 0 and support the guide shoe 410 so as to be slidable in a direction perpendicular to a plane along the bending movement of the chain 40; A solenoid cylinder 412 is provided. Two solenoid cylinders 412 are provided on a pair of guide shoes 410 and a support plate 411.
10 is moved forward and backward relative to the chain passage 413.
A pair of guide shoes 410 are adapted to guide the chain 40 by engaging with pins 401 on both sides of the chain 40 in the forward position as shown in FIG. 6, and to release the engagement in the backward position. Chain drive device 42
One end is connected to a chain drive motor 420 provided at the upper part of the arm body 300A, and the base end of the chain 40 in the arm body 300A, and the other end is connected to the motor 42 through a roller 421 at the lower part of the arm body.
The thread 422 wound around the shaft of 0 and the arm body 3
A chain support device 423 is provided at the upper part of 00A to support the chain 40 in a folded state and to prevent the chain from being pulled out due to a load. As the motor 420 rotates forward and backward, the chain 40 is let out from the arm body 300A by its own weight, or pulled back into the arm body 300A by being pulled by the yarn 422. Chain support device 4
23, as shown in FIGS. 8 and 9, a sprocket 4232 supported with upward spring force by a pair of compression coil springs 4231 on a support plate 4230 in the arm body 300A.
a pair of plates 4234 that stand up from the support plate 4230 and support the sprocket 4232 by passing the axis of the sprocket 4232 through an elongated hole 4235 that extends in the vertical direction; A stopper 4233 that engages with the stopper 4233 is provided. The sprocket 4232 is in the raised position when the chain 40 is extended and pulled back, and the sprocket 4232 is in the raised position when the chain 40 is extended and pulled back.
When a load is applied to the chain 40, the chain 40 is lowered by the load and is engaged with a stopper 4233 to prevent rotation, thereby preventing the chain 40 from being pulled out. As shown in FIG. 10, the chain locking device 43 locks the locking ring 402 of the chain 40, which has reached the inside of the arm body 300B from the opening 3001B at the lower end of the second arm body 300B, to a predetermined position inside the arm body 300B. A positioning part 430 that guides and positions the plunger is attached to the arm body 300B, moves the plunger forward and backward in a direction perpendicular to the plane along the bending movement of the chain 40, and locks the locking rod 4310 at the tip of the plunger at the forward position. solenoid type locking cylinder 4 inserted into ring 402
31, a solenoid-type lock cylinder 432 that is attached to the arm body 300B and allows the lock rod 4320 to enter the recess at the tip end of the lock rod 4310 in the forward position from above, and is activated by the forward movement of the lock rod 4310. Mitsubishi switch 433 that operates lock cylinder 432
It is equipped with

When slinging an object using this automatic slinging device 1, it is carried out as follows. For example, as shown in FIG. 1, the device 1 is suspended from a crane hook B and placed above an object E such as a long material. Next, the device 1 is lowered so as to straddle the object E, and the arm body 300 is inserted into the gap between the object E and the floor or other object.
A, 300B lower end opening 3001A, 3001
Make sure that B matches. This correspondence may be obtained by visual inspection, but
A phototube 3002 may be provided at the lower end for detection. Next, the arm moving device 20 is operated as necessary to move the arm devices 3 so that the distance between them becomes appropriate with respect to the object E. A contact detection plate device 3003 may be provided at the bottom of the arm bodies 300A, 300B in order to detect contact between the arm bodies 300A, 300B and the object E due to this movement, or to stop the movement of the arm device at the time of contact. Next, the solenoid cylinder 412 is operated to move the guide shoe 410 forward, and the chain drive motor 420 is rotated in a direction to unwind the yarn 422. As a result, the chain 40 is guided by the guide shoe 410 by its own weight while the arm body 300
It is fed out from A, and the fed out portion advances approximately horizontally toward the second arm main body 300B due to the non-bend back function of bending only in one direction as described above. The chain 40 is the second arm body 3
When reaching the arm body through the opening 3001B of 00B, a limit switch (not shown) is activated and the chain drive motor 420 is stopped. Here, the locking cylinder 431 is activated, and the locking rod 431
0 into the locking ring 402 of the chain 40. The inserted rod 4310 activates the limit switch 433 and causes the lock cylinder 432 to advance the lock rod 4320 and insert it into the recess of the locking rod 4310. This locks the locking rod 4310 in a state where it passes through the locking ring 402. Solenoid cylinder 412
The guide shoe 410 is moved backward to release the contact with the chain 40. Slinging is now complete and crane hook B can be raised to move. The chain 40 tends to bend downward under the load, but the first arm main body 300A has a cutout on the lower surface and the guide shoe 410 is retracted, so the chain 40 can freely rotate downward. The second arm body 30
In 0B, the lower surface is cut out, and the locking ring 402 is rotatably locked around the horizontal axis by a locking rod 4310, so that the chain 40 can similarly be rotated downward. It's summery. Therefore, the chain 40 can freely flex in the bendable direction and can support an object without bending stress in the opposite direction. When the device 1 is raised to lift an object, the chain support device 423 is activated by the load, and the chain 40
withdrawals are prohibited. After lowering the object to a predetermined position, lock rod 4320, locking rod 4
310 and release the chain 40,
The chain drive motor 420 is rotated to pull the chain 40 back into the arm body 300A. During the slinging operation, the chain 40 may become attached to the second arm body 300 due to various factors such as wear of the contact portion of the link element 400 of the non-bend back chain 40.
B may not reach the opening 3001B accurately, but this can be fixed by appropriately turning the bolt 310 of the spring device 31 in either arm device 3 to adjust the pressing force of the spring 311. This can be solved by adjusting the slope of

The arm bodies 300A, 300B are rotatably attached to the support beam 2 via the arm support 301 so that their lower ends can move towards and away from each other, and the arm support 301 is attached to the support beam 2 by the rod 200 so that they can move towards and away from each other. As a result, a stable slinging state can be obtained in accordance with the object E, as shown in Figures 11 and 12. Furthermore, it is possible to avoid the large bending moment that would be generated at the attachment part if the arm bodies were fixed to the support beam so that they could not rotate, resulting in a reduction in weight of the members and an improvement in durability.

The amount by which the chain 40 is extended can be set to the minimum amount necessary to reach and lock the second arm body 300B, but it is preferable to set it to an amount that allows it to have an appropriate amount of slack depending on the object E. desirable. This slack can be applied, for example, by operating the chain drive motor 420 while raising the device 1.
This can be done by letting out the .

The chain 40 is fed out and pulled back by winding or unwinding the thread 422 connected to the base end of the chain 40 around the motor shaft as described above, or by holding the chain between rubber rollers and driving and rotating the rollers. You can do whatever is appropriate, such as by moving the Further, a plurality of chains 40 may be arranged in parallel in preparation for lifting heavy objects. The slinging device 1 can be used in any manner, such as being used alone or in combination with a plurality of devices that can be approached and separated.

In the above embodiment, a pair of arm devices 3 are movably mounted on the support beam 2 so that they can move away from each other, but if this movement is not required, the arm moving device 20 can be Alternatively, the arm support 301 may be directly attached to the support beam 2 to simplify the structure. In addition, if the arm bodies 300A, 300B do not require rotation depending on the application, the arm support 301 and the spring device 3
1 can be omitted and the arm bodies can be attached to the rotating rod 200 of the support beam 2, thereby simplifying the structure while allowing the arm bodies to approach and separate from each other.
Furthermore, the arm moving device 20 may also be omitted and the arm body may be directly attached to the support beam 2 to further simplify the structure.

Effects of the invention As is clear from the above, according to the automatic slinging device of the present invention, slinging can be done easily and safely by remote control without relying directly on human hands. Slinging can be carried out in a short time with a single operation of feeding out the slinging chain without requiring a two-stage operation. By performing this operation in one stage, the structure of the device can be made relatively simple.

[Brief explanation of the drawing]

The figure shows an embodiment of the present invention.
FIG. 2 is a front view showing a partially sectional view, FIG. 3 is a front view showing an example of a non-bend back chain, FIG. 4 is a plan view thereof, and FIG.
6 and 6 are longitudinal side views of the guide device, FIG. 7 is a sectional view taken along line C-C in FIG. 6, and FIG. 8 is a longitudinal front view of the chain support device (taken along line D-D in FIG. 9). 9 is a side view thereof, FIG. 10 is a vertical sectional side view of the chain locking device, FIGS. 11 and 1
FIG. 2 is a front view showing the state of use. 1...Automatic slinging device, 2...Support beam, 3
... sling chain device, 20 ... arm moving device, 30 ... arm, 31 ... spring device,
40... Non-bend back chain, 41... Guide device, 42... Chain drive device, 43...
Chain locking device, 410...Guide shoe.

Claims (1)

[Scope of Claim for Utility Model Registration] A substantially horizontally extending support beam that is suspended from a hook or the like and raised and lowered, and a support beam that extends downward from the support beam and whose lower ends are rotatable at least in the direction of approaching each other. A pair of arms are attached to the support beam and have a notch on the lower end surface to allow the chain to hang down when lifting a load, and a slinging chain is fed out from the first arm of the pair of arms to form a second arm. and a sling chain device for slinging the chain, the sling chain device being a non-bend back chain that can be bent only in one direction from a linearly extending position, and the sling chain device is a non-bend back chain that can be bent in only one direction from a posture extending in a straight line, and that when it is paid out from the arm, The non-bend back chain is housed in the first arm so that the possible direction is upward, and the guide device is provided at the lower part of the first arm, and the guide device is configured to guide the chain from the side with respect to the chain. The chain is movable forward and backward substantially perpendicularly to the arm, and has a guide shoe that supports the chain from below in the forward position and guides the chain toward the lower part of the second arm, and releases contact with the chain in the backward position. the guide device; a chain drive device that is attached to the first arm and that sends or pulls back the chain from above with respect to the guide device in order to feed out and pull back the chain; and a chain drive device that is attached to the lower part of the second arm. is provided, and engages with the tip of the chain that is paid out from the first arm and reaches the lower part of the second arm, and holds the tip of the chain rotatably around the horizontal axis, as necessary. An automatic slinging device comprising: a chain locking device that releases the engagement by pressing the chain locking device.