JP2021004103A - Runaway prevention device of track running-type machine - Google Patents

Abstract

To provide a runaway prevention device of a track running-type machine capable of surely providing a sufficient holding power which can withstand a load during a storm and capable of reasonably relieving an overload during a huge earthquake.SOLUTION: A runaway prevention device 11 of a container crane 1 (a track running-type machine) running on a rail 4 for cargo handling works comprises: a holding member 13 suspended swingably in the longitudinal direction of the rail 4 by parallel links 12a at a lower part of the container crane 1; a stopper 14 equipped on the holding member 13 so as to freely move up and down; a spring rod 15 (a resilient body) to connect in the expandable/contractible state between the holding member 13 and the lower part of the container crane 1 so as to hold the parallel link 12 in the suspended state; and base metals 16 arranged in multiple locations on the ground side along the rail 4 so as to specify the moving range of the container crane 1 by locking the stopper 14.SELECTED DRAWING: Figure 1

Description

The present invention relates to an escape prevention device for an orbital traveling machine.

FIG. 8 shows an example of a container crane as a general orbital traveling machine, where 1 is a container crane, 2 is a port where the container crane 1 is deployed, 3 is a quay at the port 2, and 4 is a quay 3. A rail laid in the traveling path 3a in a direction orthogonal to the paper surface of FIG. 8, and a traveling wheel 7 that can roll along the rail 4 on a support leg 6 of a crane body 5 in the container crane 1. A traveling device 8 having a crane is attached.

Since the container crane 1 may escape due to being blown by a strong wind during suspension, the container crane 1 is stopped at a predetermined position on the rail 4 at the end of operation, and the support legs at the lower part of the crane body 5 are stopped. An anchor (not shown: see Patent Document 1) equipped so as to be able to move up and down between the six is inserted into the foundation hardware on the ground side to fix it.

However, since the foundation hardware for fixing this type of anchor must withstand a very large load in strong winds, the burden on the quay 3 (foundation) is large, and 1 to 2 in the traveling range of the container crane 1 Since it can be installed only in places, it may not be in time to move to a fixed position with the foundation hardware in a situation where the wind rapidly strengthens during cargo handling work and it is likely to develop into a gust of wind.

Therefore, a clamp device (not shown: see Patent Document 1) for fixing the rail 4 by sandwiching it from both sides is provided between the support legs 6 at the lower part of the crane body 5, and this clamp device is used in combination. The container crane 1 can be fixed at an arbitrary position in the traveling range.

JP-A-2002-60181

However, the accuracy of the side surface of the rail 4 on which the container crane 1 travels is not so high, and when the dimensions from the center line to the side surface in the width direction vary from side to side, the rail by the clamping device is used. There is a possibility that sufficient holding force cannot be obtained because the pinching from both sides of 4 is not performed uniformly, and even if the container crane 1 can be firmly fixed by the clamping device, it is huge in the fixed state. When an earthquake occurs and a strong horizontal force acts on the container crane 1, the strong horizontal force cannot be buffered and absorbed at the fixed portion of the clamping device, so that a large impact force is applied to each part of the superstructure of the container crane 1. There was a risk of action and damage.

The present invention has been made in view of the above circumstances, and is an orbital traveling machine capable of reliably obtaining a sufficient holding force capable of withstanding a load during a storm and easily relieving an overload during a large earthquake. It is an object of the present invention to provide an escape prevention device.

The present invention is an escape prevention device for a track-traveling machine that travels on rails to perform cargo handling work.
A holding member suspended swingably in the longitudinal direction of the rail by a parallel link at the lower part of the track-traveling machine.
A stopper mounted on the holding member so as to be able to move up and down,
An elastic body that expands and contracts between the lower part of the orbital traveling machine and the holding member so as to hold the parallel link in a hanging state.
It is provided with basic hardware arranged at a plurality of locations on the ground side along the rail so as to define the moving range of the track-traveling machine by locking the stopper.

Further, in the escape prevention device of the orbital traveling machine, the elastic body exhibits resistance at a high rate of increase in a region of relatively small shaking, withstands a load during a storm, and has a relatively large shaking. In the region, it is preferable that the region is configured as a push-pull type having a bilinear characteristic in which the increased resistance force in the small shaking region is maintained at a low rate of increase and the overload at the time of a large earthquake is released.

Further, the escape prevention device of the track-traveling machine includes a foundation hardware that engages with the stopper when the track-traveling machine reaches the traveling end of the rail, and the foundation hardware is more than other foundation hardware. It is preferable that the height dimension is set relatively large.

Further, in the escape prevention device of the track traveling type machine, it is preferable that the foundation hardware is attached to the shaped steel laid on the foundation of the rail.

According to the escape prevention device of the orbital traveling machine of the present invention described above, the stopper of the holding member can be lowered to be locked to the foundation hardware on the ground side, and the locked state can be elastically held by the elastic body. Therefore, it is possible to reliably obtain a sufficient holding force that can withstand the load during a storm without being affected by the dimensional accuracy of the rail, and it is possible to reliably prevent the orbital traveling machine from escaping due to the storm. Moreover, in the event of a huge earthquake, the parallel link swings and tilts greatly against the holding force of the projectile, so that the holding member rises and the stopper lifts, and the stopper rides on the foundation hardware. Since the locked state can be released and the overload of a huge earthquake can be released without difficulty, various excellent effects such as avoiding damage to the track-traveling machine can be achieved.

It is a front view which shows the Example of the escape prevention device of the track traveling type machine of this invention. It is a detailed view which shows the main part of FIG. 1 enlarged. It is a graph which shows the bilinear characteristic of the spring rod of FIG. FIG. 5 is a cross-sectional view of the foundation hardware of FIG. 2 as viewed from the longitudinal direction of the rail. It is sectional drawing which saw the stopper of FIG. 2 from the longitudinal direction of a rail. It is a figure which shows the state which the container crane of FIG. 2 moved to the left side in the figure. It is a front view which shows the example which gave the function of the running end buffer to the basic hardware. It is a side view which shows an example of the container crane as a track traveling machine.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an example of the embodiment of the present invention, and the parts having the same reference numerals as those in FIG. 8 represent the same objects, and in the container crane 1 as the track traveling machine shown here. A lower frame 6a extending along the rail 4 is provided between the support legs 6 of the crane body 5 so as to connect the support legs 6, and a plurality of lower frames 6a are provided on the bottom surface side of the lower frame 6a (two in the example of FIG. 1). The traveling device 8 is provided.

The traveling device 8 includes an upper equalizer beam 9a, an intermediate portion equalizer beam 9b, a lower equalizer beam 9c, and a traveling wheel 7. The upper equalizer beam 9a is provided on the bottom surface side of the lower frame 6a. An intermediate portion is supported by a rocker pin 10a extending in a horizontal direction perpendicular to the traveling direction, and is arranged swingably.

Further, the intermediate portion equalizer beam 9b is swingably arranged at both ends of the upper equalizer beam 9a in the traveling direction by supporting the intermediate portion by rocker pins 10b extending in the horizontal direction perpendicular to the traveling direction.

Further, the lower equalizer beam 9c is swingably arranged so that the intermediate portion is supported by rocker pins 10c extending in the horizontal direction perpendicular to the traveling direction at both ends of the intermediate portion equalizer beam 9b in the traveling direction. The traveling wheels 7 are arranged at both ends of the lower equalizer beam 9c in the traveling direction so as to be rotatable along the rail 4.

In this embodiment, the escape prevention device 11 of the container crane 1 is provided on the bottom surface side of the lower frame 6a sandwiched between the two traveling devices 8, and the escape prevention device 11 is the lower portion. A holding member 13 suspended from the bottom surface of the frame 6a by a parallel link 12 so as to swing in the longitudinal direction of the rail 4, a stopper 14 mounted on the holding member 13 so as to be able to move up and down, and the parallel link 12 were hung down. The moving range of the container crane 1 is increased by locking the spring rod 15 (elastic body) that connects the lower frame 6a and the holding member 13 so as to keep the state in a state, and the stopper 14. A large number of basic hardware 16 arranged on the ground side along the rail 4 as specified are provided.

As shown enlarged in FIG. 2, the holding member 13 is swingably supported on both sides of the lower portion of the rail 4 in the longitudinal direction by the link rods 12a and 12a of the parallel link 12, and is upward. The rails are elastically supported by spring rods 15 and 15 which are opened so as to be separated from each other in the longitudinal direction toward the rail 4.

Here, as shown in the graph in FIG. 3, the spring rod 15 exerts a resistance force at a high rate of increase in a relatively small shaking region, withstands a load during a storm, and in a relatively large shaking region. It is configured as a push-pull type with bilinear characteristics that maintains the increased resistance in the small shaking region at a low rate of increase and releases the overload at the time of a large earthquake.

As shown in FIG. 4, the foundation hardware 16 is directly attached to the shaped steel 17 laid on the foundation of the rail 4 (the case of H steel is exemplified in the illustration in FIG. 4) by welding or bolting. It is possible to dispose of it without requiring a large-scale foundation work, and it is easy to add it to the existing equipment.

Further, the stopper 14 is manually moved up and down with respect to the holding member 13, and is lowered by an operator when the container crane 1 is desired to be fixed to prevent escape, and is engaged with the base hardware 16. Although it is stopped (see FIG. 5), it is possible to adopt various existing types of elevating mechanisms for the elevating mechanism, and the elevating mechanism is automatically operated using a hydraulic piston or the like. It may be like this.

When the escape prevention device 11 is configured in this way, for example, as shown in FIG. 2, the container crane 1 moves to the left side in the drawing with the stopper 14 lowered below the height dimension of the foundation hardware 16. When it moves, as shown in FIG. 6, the lower end of the stopper 14 is locked to the base hardware 16, so that the holding member 13 stays at a predetermined position and the parallel link 12 tilts against the resistance force of the spring rod 15. As a result, the movement of the container crane 1 is buffered and absorbed, and the locked state between the stopper 14 and the foundation hardware 16 is elastically held by the spring rod 15.

That is, the right spring rod 15 in FIG. 6 exerts a resistance force to be compressed and return to the original length, while the left spring rod 15 in FIG. 6 is stretched to the original length. The resistance to return will be exhibited, and due to the bilinear characteristics shown in the graph in Fig. 3, the resistance will increase at a high rate of increase even in a relatively small shaking region, effectively withstanding the load during a storm. It becomes possible.

At this time, as described above, since the locked state between the stopper 14 and the foundation hardware 16 is elastically held by the spring rod 15, it is possible to buffer and absorb a strong horizontal force due to a storm or an earthquake. As a result, the load applied to the foundation (quay 3) is significantly reduced as compared with the conventional case, and as a result, a large number of foundation hardware 16 can be arranged along the rail 4.

As described in this embodiment, if a large number of foundation hardware 16 are arranged along the rail 4, when the wind is rapidly strengthened and a gust is likely to develop, it is immediately nearby. The stopper 14 can be locked with respect to the foundation hardware 16 to quickly fix the container crane 1.

Further, when an overload of a predetermined value or more is applied in a state where the lower end of the stopper 14 is locked to the foundation hardware 16 at the time of a huge earthquake or the like, the increased resistance force in the small shaking region is maintained at a low rate of increase. The swing of the parallel link 12 is not excessively suppressed, and the parallel link 12 swings and tilts greatly against the holding force of the spring rod 15, so that the holding member 13 rises and the stopper 14 Is lifted, and the stopper 14 rides on the base hardware 16 to release the locked state and allow the overload to be released without difficulty.

However, as shown in FIG. 7, when the foundation hardware 16'that locks with the stopper 14 is arranged in a state where the container crane 1 reaches the traveling end of the rail 4, the foundation hardware 16' The height dimension is set to be relatively larger than that of the other foundation hardware 16 so that the stopper 14 does not easily ride on the foundation hardware 16 even if the parallel link 12 swings and tilts greatly. It is also possible to make the basic hardware 16'function as a traveling end buffer. Even in this case, it is preferable to leave the existing traveling end buffer 18 so that double safety measures can be taken.

Therefore, according to the above embodiment, the stopper 14 of the holding member 13 can be lowered to be locked to the foundation hardware 16 on the ground side, and the locked state can be elastically held by the spring rod 15. It is possible to reliably obtain a sufficient holding force that can withstand the load during a storm without being affected by dimensional accuracy, etc., and it is possible to reliably prevent the container crane 1 from escaping due to the storm. At the time of occurrence, the parallel link 12 swings and tilts against the holding force of the spring rod 15, so that the holding member 13 rises and the stopper 14 lifts, and the stopper 14 rides on the foundation hardware 16. Since the locked state can be released and the overload of the huge earthquake can be released without difficulty, damage to the container crane 1 can be avoided in advance.

It should be noted that the escape prevention device for the orbital traveling machine of the present invention is not limited to the above-described embodiment, and of course, various modifications can be made without departing from the gist of the present invention.

1 Container crane (orbital traveling machine)
2 Port 3 Quay (foundation)
3a Travel path 4 Rail 5 Crane body 6 Support leg 6a Lower frame 7 Travel wheel 8 Travel device 9a Upper equalizer beam 9b Middle equalizer beam 9c Lower equalizer beam 10a Rocker pin 10b Rocker pin 10c Rocker pin 11 Escape prevention device 12 Parallel link 12a Link rod 13 Holding member 14 Stopper 15 Spring rod (elastic body)
16 Foundation hardware 16'Foundation hardware 17 Shaped steel 18 Running end buffer

Claims (4)

It is an escape prevention device for orbital traveling machines that travel on rails to perform cargo handling work.
A holding member suspended swingably in the longitudinal direction of the rail by a parallel link at the lower part of the track-traveling machine.
A stopper mounted on the holding member so as to be able to move up and down,
An elastic body that expands and contracts between the lower part of the orbital traveling machine and the holding member so as to hold the parallel link in a hanging state.
An escape prevention device for a track-traveling machine provided with foundation hardware arranged at a plurality of locations on the ground side along the rail so as to define a moving range of the track-traveling machine by locking the stopper. The projectile exerts resistance at a high rate of increase in a relatively small shaking region to withstand a load during a storm, and in a relatively large shaking region, the increased resistance in the small shaking region is reduced. The escape prevention device for a track-traveling machine according to claim 1, which is configured as a push-pull type having a bilinear characteristic so as to maintain an increase rate and release an overload at the time of a large earthquake. A claim in which the track-traveling machine is provided with a foundation hardware that engages with the stopper when it reaches the traveling end of the rail, and the height dimension of the foundation hardware is set to be relatively larger than that of other foundation hardware. Item 3. The escape prevention device for the track-traveling machine according to item 1 or 2. The escape prevention device for a track-traveling machine according to claim 1, 2 or 3, wherein the foundation hardware is attached to a shaped steel laid on the foundation of the rail.

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