JP2016044075A - Wheel dropping prevention device for cargo handling machine and earthquake proof supporting device for traveling crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wheel dropping prevention device for a cargo handling machine and an earthquake proof supporting device for a traveling crane in which a problem is prevented with a simple construction, that when big earthquake occurs, shaking in rectangular direction to a rail of the cargo handling machine occurs, and wheel dropping occurs by lifting of support legs.SOLUTION: A middle equalizer beam 6 comprises: a first link member 21 constructing one side in traveling direction; a second link member 22 constructing the other side in traveling direction; a locker pin 5 connecting upper sides of the first link member 21 and the second link member 22 so that lower sides of the first link member 21 and the second link member 22 may close and apart in traveling direction; and a pin 21c and a restriction hole 22c restricting the apart distance between the lower sides of the first link member 21 and the second link member 22 at a lower position than the locker pin 5.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a phenomenon in which, when a huge earthquake occurs in a loading crane such as a traveling crane or an unloader used in a harbor portion, the loading machine is swayed in a direction perpendicular to the rail, and the wheel is lifted. The present invention relates to a derailment prevention device for a cargo handling machine and a seismic isolation support device for a traveling crane that can prevent such a problem with a simple configuration. In addition, the cargo handling machine in the present invention includes a container crane that is a large traveling crane provided in a harbor, but is not limited thereto, and if the leg structure has a gate shape and travels on the rail, This applies to unloaders.

  A traveling crane such as a container crane or an unloader as a cargo handling machine has a crane main body or an unloader main body in which a support leg is formed in a gate shape, and a traveling device provided at the four corners of the support leg of the crane main body or the unloader main body. Travel along rails on the quay.

  When an earthquake occurs in such a traveling crane or unloader as a cargo handling machine, an excitation force in a direction perpendicular to the traveling direction of the cargo handling machine acts on the cargo handling machine as an external force. The crane body of the traveling crane as the cargo handling machine and the unloader body of the unloader have flexibility, and a small-scale or medium-scale earthquake occurs and an excitation force in a direction perpendicular to the traveling direction acts. However, since the crane body and the unloader body are flexibly deformed to absorb the excitation force, no problem occurs.

  However, when a large-scale earthquake occurs, the load handling machine is greatly shaken, and the support legs are lifted, which may cause the wheels to come off the rails.

  In order to cope with such a problem, it has been proposed that a conventional cargo handling machine is provided with various derailment prevention devices.

  For example, Patent Document 1 proposes a device in which a seismic isolation device is provided between a lower equalizer beam and an upper equalizer beam to prevent wheel removal. The seismic isolation device includes a sliding portion that is provided in the lower equalizer beam and slides vertically along the upper equalizer beam, and a damping element that includes a hydraulic cylinder provided between the lower equalizer beam and the upper equalizer beam. And a control unit of the hydraulic mechanism.

JP 2007-284230 A

  However, the seismic isolation device of Patent Document 1 has a problem in that the structure is large and a control device for controlling the hydraulic mechanism is required, and the structure for preventing the wheel removal is complicated and expensive.

  The present invention has been made in view of the above-described conventional problems, and when a huge earthquake occurs, a problem occurs in which a swing in a direction perpendicular to the rail of the cargo handling machine occurs and the support leg lifts to cause the wheel to come off. It is an object of the present invention to provide a derailment prevention device for a cargo handling machine and a seismic isolation support device for a traveling crane which can be prevented by a simple configuration.

The present invention is a derailment prevention device for a cargo handling machine in which a traveling device traveling on a rail is provided on a support leg,
The traveling device includes at least one equalizer beam supported to be swingable with respect to an upper member,
The equalizer beam is
A first link member constituting one side of the traveling direction;
A second link member constituting the other side of the traveling direction;
A connecting member for connecting the first link member and the upper side of the second link member so that the lower side of the first link member and the second link member can freely approach and separate along the traveling direction;
And a restriction mechanism that restricts a distance at which the first link member and the lower side of the second link member are separated from each other at a position below the connecting member. .

In the derailment prevention device for the cargo handling machine, the restriction mechanism includes:
A pin provided on one of the first link member and the second link member;
A restriction hole formed on either one of the first link member and the second link member and slidably fitted with the pin;
It is preferable that a distance that the lower side of the first link member and the second link member are separated is limited by the pin being in contact with the end of the restriction hole.

In the derailment prevention device for the cargo handling machine, the restriction mechanism includes:
A flexible member connecting the lower side of the first link member and the second link member;
The flexible member is allowed to move so that the lower side of the first link member and the second link member approach each other, and the flexible member is pulled to pull the first link member and the first link member. It is preferable that the distance at which the lower side of the two link members separate is limited.

In the derailment prevention device for the cargo handling machine, the restriction mechanism includes:
The first link member and the second link member are each provided with a locking piece formed to be able to engage and disengage from each other,
Movement of the first link member and the lower side of the second link member toward each other is allowed when the locking pieces are separated from each other, and when the locking pieces are engaged with each other, the first link member and the second link member are allowed to move. It is preferable that the distance that the lower side of the second link member is separated is limited.

In the derailment prevention device for the cargo handling machine, the restriction mechanism includes:
One end of each of the first link member and the second link member is rotatably attached, and each other end is connected by a connecting pin,
A link stopper for preventing the restriction link from being arranged in a straight line,
The limit link bends at the connecting pin portion to allow movement in the direction in which the lower side of the first link member and the second link member approach, and the limit link is pulled against each other to abut against the link stopper. The distance at which the first link member and the lower side of the second link member are separated is preferably limited.

In the derailment prevention device for the cargo handling machine, the restriction mechanism includes:
A linear motion rod having one end attached to one of the first link member and the second link member and the other end extending to the other side of the first link member and the second link member;
A flange provided at the other end of the linear rod;
A rod stopper provided on the other of the first link member and the second link member so as to be freely engageable and disengageable with respect to the flange;
The movement of the first link member and the lower side of the second link member approaching each other is allowed by the separation of the flange of the linear rod from the rod stopper, and the flange of the linear rod is engaged with the rod stopper. Thus, it is preferable that a distance that the lower side of the first link member and the second link member are separated is limited.

  In the above-described wheel removal prevention device for a cargo handling machine, it is preferable that an elastic member that applies an elastic force in a direction in which the lower side of the first link member and the lower side of the second link member are brought closer to each other is provided.

In the derailment prevention device for the cargo handling machine, the elastic member is:
Preferably, the compression coil spring is disposed on the upper side of the connecting member so as to apply an elastic force in a direction in which the first link member and the lower side of the second link member are brought closer to each other.

  In the anti-wheel-removal device for the cargo handling machine, the elastic force is provided between the connecting pin of the restriction link and the connecting member so as to bring the lower side of the first link member closer to the lower side of the second link member. It is preferable to provide a restoring spring for imparting.

  The above-described wheel removal prevention device for a cargo handling machine preferably includes a damping device that generates a damping force when the first link member and the second link member move away from each other.

In the anti-derailing device for the cargo handling machine, the damping device is
The first link member and the second link member are attached between the first link member and the second link member, and the first link member and the second link member are allowed to move in a direction in which the lower side of the first link member and the second link member approaches. It is preferable that the damper acts on a damping force in a direction in which the lower side of the lower part is separated.

In the anti-derailing device for the cargo handling machine, the damping device is
It is attached between the first link member and the second link member, and a movement in a direction in which the lower side of the first link member and the second link member approaches is permitted by a ratchet mechanism, and the first link member and the first link member In the direction in which the lower side of the two link members is separated, an elastic-plastic brace that absorbs energy by elongation after yielding accompanying pulling by restraint by the ratchet mechanism is preferable.

In the derailment prevention device for the cargo handling machine, the vehicle includes an eccentric cam provided on one of the first link member and the second link member so as to abut on the linear motion rod of the restriction mechanism,
The movement of the lower side of the first link member and the second link member is permitted by the rotation of the eccentric cam with respect to the linear motion rod, and the lower side of the first link member and the second link member are separated from each other. It is preferable to constitute a damping device that generates a damping force by the frictional resistance of the eccentric cam with respect to the linear motion rod.

The present invention is a seismic isolation support device for a traveling crane in which a traveling device that travels on a rail is provided on a support leg,
The traveling device includes at least one equalizer beam supported to be swingable with respect to an upper member,
The equalizer beam is
A first link member constituting one side of the traveling direction;
A second link member constituting the other side of the traveling direction;
A connecting member that connects the first link member and the upper side of the second link member so that the lower side of the first link member and the second link member can approach or leave along the traveling direction;
And a limiting mechanism for limiting a distance below the first link member and the second link member at a lower position than the connecting member. is there.

  According to the derailment prevention device for a cargo handling machine and the seismic isolation support device for a traveling crane according to the present invention, when a huge earthquake occurs, a swing in a direction perpendicular to the rail of the cargo handling machine occurs and the support leg floats. It is possible to achieve an excellent effect that a problem such as derailment can be prevented with a simple configuration.

It is a side view which shows the Example of the derailment prevention apparatus of the cargo handling machine of this invention, and the seismic isolation support apparatus of a traveling crane. (A) is a side view of the intermediate equalizer beam in the embodiment. FIG. 5B is a plan view showing a part of the intermediate equalizer beam of FIG. (C) is a top view of the intermediate | middle part equalizer beam of (A). It is sectional drawing which looked at the intermediate | middle part equalizer beam of FIG. 2 (A) from the III-III direction. It is a side view which isolate | separates and shows the 1st link member and 2nd link member in an Example. It is a side view which shows the traveling crane as an example of the cargo handling machine distribute | arranged to the shore. (A) is a side view which shows the normal state of the derailment prevention apparatus in an Example, (B) is a side view which shows the state at the time of the occurrence of an earthquake of the derailment prevention apparatus in an Example. It is a side view which shows the example which used the limiting mechanism in the Example of the derailment prevention apparatus of the cargo handling machine of this invention, and the seismic isolation support apparatus of a traveling crane as the flexible member. It is a figure which shows the example which used the limiting mechanism in the Example of the derailment prevention apparatus of the cargo handling machine of this invention and the seismic isolation support apparatus of a traveling crane as an engaging piece, (A) is a side view, (B) is a perspective view. FIG. 8C is a sectional view taken along line VIIIC-VIIIC in FIG. It is a side view which shows the example which used the limiting mechanism in the Example of the derailment prevention apparatus of the cargo handling machine of this invention and the seismic isolation support apparatus of a traveling crane as the limiting link. It is a side view which shows the example which used the limiting mechanism in the Example of the derailment prevention apparatus of the cargo handling machine of this invention and the seismic isolation support apparatus of a traveling crane as the linear motion rod. It is a figure which shows the example which used the damping device in the Example of the derailment prevention apparatus of the cargo handling machine of this invention, and the seismic isolation support apparatus of a traveling crane as the elastic-plastic brace, (A) is a side view, (B) is a figure. FIG. 11 (A) is an XIB-XIB arrow view, and FIG. 11 (C) is a perspective view of the ratchet mechanism. It is a side view which shows the example which used the damping device in the example of FIG. 10 as the eccentric cam which contact | abuts to a linear motion rod.

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

  FIG. 1 is a side view showing a traveling device 102 provided with a support leg 101 and a derailment prevention device of the present invention in a traveling crane 100 as an example of a cargo handling machine.

  The traveling crane 100 includes a crane main body in which support legs 101 are formed in a gate shape, and a traveling device 102 provided at four corners of the support legs 101 of the crane main body. The traveling device 102 is capable of traveling on the rail 1, and includes a number of wheels 2 that are even or odd numbers that meet the quay conditions for traveling on the rail 1. In the embodiment, an eight-wheel type traveling device 102 having eight wheels 2 is illustrated.

  The traveling device 102 includes a large upper equalizer beam 4 (upper member), medium intermediate equalizer beams 6 and 6, and small lower equalizer beams 11, 11, 11, 11, below the support legs 101. It is equipped with.

  The upper equalizer beam 4 is swingably supported with respect to the lower portion of the support leg 101 by a rocker pin 3 extending in a direction orthogonal to the rail 1 and in the horizontal direction. Two middle-sized intermediate equalizer beams 6 are attached to the lower part of the upper equalizer beam 4 along the traveling direction.

  The middle equalizer beam 6 is swingably supported on the lower part of the upper equalizer beam 4 by rocker pins 5 (connection members).

  The lower equalizer beam 11 is swingably supported by the rocker pin 10 below the intermediate equalizer beam 6. The lower equalizer beam 11 is provided with wheels 2 for traveling on the rail 1.

  The intermediate equalizer beam 6 will be described in detail with reference to FIGS. In this embodiment, a case where the intermediate equalizer beam 6 is used as an anti-wheel removal device is shown. In the example shown in FIG. 1, the middle equalizer beam 6 is shown as having a function of a derailment prevention device, but only one of them may be a derailment prevention device. Two lower equalizer beams 11 are attached to the lower part of the intermediate equalizer beam 6 along the traveling direction.

  The intermediate equalizer beam 6 includes a first link member 21, a second link member 22, a rocker pin 5 (connecting member), a limiting mechanism including a pin 21c and a limiting hole 22c, and a hydraulic damper 23 (attenuator). And a compression coil spring 24 (elastic member).

  As shown on the left side of FIGS. 2 and 4, the first link member 21 is a member that constitutes one side in the traveling direction (left side in FIG. 2). As shown in FIG. 4, the first link member 21 has a pin hole 21a formed on the upper right side (upper other side), a pin hole 21b formed on the lower left side (lower one side), and the lower right side (lower other side). ) Is provided with a cylindrical pin 21c. Further, a fixing base 21d for fixing the head side of the hydraulic damper 23 is provided on the upper left side (upper one side).

  The 2nd link member 22 is a member which comprises the other side (right side of FIG. 2) of a running direction, as shown to the right side of FIG. 2, FIG. As shown in FIG. 4, the second link member 22 has a pin hole 22a formed on the upper left side (upper one side), a pin hole 22b formed on the lower right side (lower other side), and the lower left side (upper one side). ) Is formed with a restriction hole 22c. The restriction hole 22 c has an oval shape (so-called elongate hole shape), and the long axis direction extends in a curved direction (traveling direction) of the second link member 22. Further, a fixing base 22d for fixing the cap side of the hydraulic damper 23 is provided on the upper right side (upper other side).

  As shown in FIGS. 2 and 3, the first link member 21 and the second link member 22 have the pin hole 21a and the pin hole 22a overlapped with the rocker pin 5 and the pin 21c. Is slidably fitted into the restriction hole 22c. As a result, the first link member 21 and the second link member 22 are connected by the rocker pin 5 on the upper side, and the lower side can be swung around the rocker pin 5 as a rocking center. The lower side of the first link member 21 and the second link member 22 can swing until the pin 21c contacts both ends of the restriction hole 22c.

  Here, the pin hole 21 a and the pin hole 22 a through which the rocker pin 5 is passed are the swing center of the first link member 21 and the second link member 22, and the swing center of the intermediate equalizer beam 6. Also, the rocker pin 10 is passed through the pin hole 21b and the pin hole 22b to support the lower equalizer beam 11 so as to be swingable.

  Further, it is preferable that the pin 21c and the restriction hole 22c are formed as far as possible from the rocker pin 5 which is the center of swing. That is, in order to prevent the lower side of the first link member 21 and the second link member 22 from being separated from each other by the constant load from the upper portion by the pin 21c and the restriction hole 22c, the position as far as possible from the swing center. Thus, it is preferable to bring the pin 21c into contact with the end of the restriction hole 22c because the load can be reduced. In the present embodiment, as shown in FIG. 2A, the positions where the pins 21c and the restriction holes 22c are formed are substantially the same height positions as the positions where the pin holes 21b and the pin holes 22b are formed.

  As shown in FIG. 3, a total of two pairs of pins 21c and restriction holes 22c are arranged on one side and the other side in the depth direction. Since the pin 21c is thus divided into two pins 21c in the depth direction, the lower equalizer beam 11 does not interfere with the lower equalizer beam 11 when the two lower equalizer beams 11 are arranged at the lower portion thereof. The beams 11 can be arranged close to each other.

  As described above, when the first link member 21 and the second link member 22 are arranged as the intermediate equalizer beam 6 as shown in FIG. 1, the lower side of the first link member 21 and the second link member 22 can freely approach and separate along the traveling direction. . Here, when the lower side of the first link member 21 and the second link member 22 approaches along the traveling direction, the overlapping portion increases by moving in the direction in which the lower side of the first link member 21 and the second link member 22 approaches. That means. At this time, the lower equalizer beam 11 that is swingably supported by the first link member 21 and the lower equalizer beam 11 that is swingably supported by the second link member 22 approach each other. The height of the first link member 21 and the second link member 22 increases as they approach each other, and the height decreases as they move away.

  A hydraulic damper 23 is disposed between the fixing base 21 d provided on the first link member 21 and the fixing base 22 d provided on the second link member 22. When the hydraulic damper 23 swings so that the lower sides of the first link member 21 and the second link member 22 are separated from each other, the rod 23a moves in a direction in which the rod 23a is extracted from the cylinder 23b, and a damping force is generated at that time. Further, when the hydraulic damper 23 swings so that the lower sides of the first link member 21 and the second link member 22 approach each other, the rod 23a moves in a direction in which the rod 23a is pushed into the cylinder 23b. At this time, the damping force is lowered.

  The hydraulic damper 23 is, for example, a damper provided with a check valve. When the hydraulic damper 23 swings so that the lower sides of the first link member 21 and the second link member 22 approach each other, the hydraulic damper 23 can be freely opened. Can swing. On the other hand, when the lower side of the first link member 21 and the second link member 22 are separated from each other, the check valve is closed and a damping force is applied by operating oil flowing through the orifice provided in the cylinder 23b. Yes. In addition, although the hydraulic damper 23 was illustrated, it is not limited to this. For example, a magnetic damper or a mechanical damper may be used.

  Further, as shown in FIG. 2B, the first link member 21 and the second link member 22 are connected by a compressed compression coil spring 24 at a portion above the rocker pin 5. Four compressed compression coil springs 24 are arranged along the depth direction, and elastic such that the first link member 21 and the second link member 22 swing in the direction of approaching each other with the rocker pin 5 as a fulcrum. Giving power. In addition, although the elastic member was demonstrated with the compression coil spring 24, it is not limited to this. For example, the elastic member may be a leaf spring.

  Further, as shown in FIG. 2C, two rectangular shear plates 25 are arranged on the upper surfaces of the first link member 21 and the second link member 22 with a predetermined interval in the depth direction. A shear plate 25 a is disposed between the shear plates 25, 25 and the shear plates 25, 25. The shear plate 25a is attached to the lower part of the upper equalizer beam 4, and is disposed between the shear plates 25 and 25 and the shear plates 25 and 25, thereby preventing the rocker pins 5 from being inclined.

  Next, the operation of the above embodiment will be described with reference to FIGS. FIG. 5 is a side view showing a traveling crane 100 as an example of a cargo handling machine arranged on the shore. FIG. 6 (A) is a side view showing a derailment prevention device in a normal state. FIG. 6B is a side view showing the derailment prevention device during an earthquake.

  It is assumed that the traveling crane 100 shown in FIG. 5 is shaken by an earthquake in the horizontal direction and perpendicular to the extending direction of the rail 1. When the excitation force due to the earthquake is small, the traveling crane 100 absorbs the shaking by being deformed flexibly.

  At this time, the intermediate equalizer beam 6 maintains the state shown in FIG. 6A and absorbs shaking. The intermediate equalizer beam 6 in this state receives a load from the support leg 101, the upper equalizer beam 4, and the like. The load from the support leg 101, the upper equalizer beam 4 and the like is larger than the spring force that the compression coil spring 24 tries to bring the lower side of the first link member 21 and the second link member 22 closer to each other, as shown in FIG. The state shown is retained.

  On the other hand, when a huge earthquake occurs and the excitation force is large, the traveling crane 100 cannot absorb the shaking by its own deformation, and the wheels 2 of the sea side support legs 101 and the land side support legs. 101 wheels 2 try to lift from rails 1 alternately.

  At this time, as shown in FIG. 6 (B), when the upper equalizer beam 4 tries to move upward via the support leg 101, the intermediate equalizer beam 6 has the rocker pin 5 as a center. The lower side and the lower side of the second link member 22 approach and swing so as to partially overlap and extend in the height direction. At this time, the two lower equalizer beams 11 and 11 approach each other. Thus, even if the upper equalizer beam 4 moves upward, the middle equalizer beam 6 is allowed to extend in the height direction, and the wheels 2 of the lower equalizer beam 11 are removed from the rail 1. To prevent.

  At this time, the compression coil spring 24 assists the swing of the spring force so that the lower side of the first link member 21 and the second link member 22 approach each other with the rocker pin 5 as the swing center. As a result, even if the acceleration of the support leg 101 rising is large, the compression coil spring 24 follows this to swing the first link member 21 and the second link member 22 so that their lower sides approach each other. It is more effectively prevented that the wheel 2 of the beam 11 is detached from the rail 1.

  Next, how the state of FIG. 6B returns to the state of FIG. 6A will be described. The upper equalizer beam 4 moves downward due to its own weight. Then, the middle equalizer beam 6 is pushed by the upper equalizer beam 4, the first link member 21 and the second link member 22 swing so that their lower sides are separated, and the pin 21c contacts the left end of the restriction hole 22c. Move until touching.

  At this time, the hydraulic damper 23 acts to attenuate the swing of the first link member 21 and the second link member 22. As a result, the hydraulic damper 23 can relieve the impact load that acts on the middle equalizer beam 6 from the upper equalizer beam 4. At this time, the compression coil spring 24 is also elastically shrunk to reduce the impact load.

  The intermediate equalizer beam 6 of the present invention includes a first link member 21 that constitutes one side in the traveling direction, a second link member 22 that constitutes the other side in the traveling direction, the first link member 21 and the second link member. The rocker pin 5 that connects the upper side of the first link member 21 and the second link member 22 so that the lower side can approach or leave the lower side along the traveling direction, and below the first link member 21 and the second link member 22 And a restricting mechanism for restricting the distance away from the rocker pin 5 at a position below the rocker pin 5 to constitute a wheel slip prevention device.

  Therefore, when a huge earthquake occurs and the wheel 2 of the support leg 101 is going to lift from the rail 1, the intermediate equalizer beam 6 of the present invention has the lower side of the first link member 21 around the rocker pin 5. The lower side of the second link member 22 approaches and its height increases. Thereby, it is possible to prevent the wheel 2 from being detached from the rail 1.

  Moreover, the intermediate | middle part equalizer beam 6 of this invention connects the upper side of the 1st link member 21 and the 2nd link member 22 with the rocker pin 5, and has arrange | positioned the limiting mechanism in the downward position rather than this. That is, the intermediate equalizer beam 6 according to the present invention has a configuration in which the rocker pin 5 is arranged on the upper portion thereof like the general equalizer beam, and is compatible with the general equalizer beam. Therefore, only the middle part equalizer beam of the existing traveling crane can be configured as the present invention.

  Further, the limiting mechanism in the intermediate equalizer beam 6 according to the present invention includes a pin 21 c provided on one of the first link member 21 and the second link member 22, and the first link member 21 and the second link member 22. A restriction hole 22c formed on either one of them. And the distance which the 1st link member 21 and the lower side of the 2nd link member 22 leave | separate is restrict | limited because the pin 21c contact | abuts the edge of the restriction | limiting hole 22c. Accordingly, the swing of the first link member 21 and the second link member 22 can be limited with a simple configuration.

  Further, the intermediate equalizer beam 6 of the present invention includes a hydraulic damper 23 that generates a damping force when the first link member 21 and the second link member 22 are moved away from each other. As a result, the impact load generated when the extended intermediate equalizer beam 6 returns to the normal state shown in FIG. 6 can be reduced.

  The intermediate equalizer beam 6 of the present invention includes a compression coil spring 24 that applies an elastic force in a direction in which the lower side of the first link member 21 and the lower side of the second link member 22 are brought closer to each other. As a result, the wheel 2 of the support leg 101 of the traveling crane 100 is urged against the rail 1 by the spring force of the compression coil spring 24, and even if the acceleration of the support leg 101 is high, the compression coil spring follows this. 24 is swung so that the lower side of the 1st link member 21 and the 2nd link member 22 approaches, and it prevents that the wheel 2 remove | deviates from the rail 1 more effectively.

  FIG. 7 is a side view showing an example in which the limiting mechanism in the embodiment of the derailment prevention device for a cargo handling machine and the seismic isolation support device for a traveling crane according to the present invention is a flexible member 30. 7, parts denoted by the same reference numerals as in FIGS. 1 to 6 represent the same items, and the basic configuration is the same as that shown in FIGS.

  In the example shown in FIG. 7, a limiting mechanism is configured by connecting the lower side of the first link member 21 and the second link member 22 with a flexible member 30 such as a chain or a wire rope.

  In the example shown in FIG. 7, when a huge earthquake occurs and the excitation force is large, the wheel 2 of the support leg 101 on the sea side and the wheel 2 (see FIG. 5) of the support leg 101 on the land side are separated from the rail 1. Although it tries to float up alternately, movement in the direction in which the lower side of the first link member 21 and the second link member 22 approaches as the flexible member 30 bends is allowed. As a result, the intermediate equalizer beam 6 extends in the height direction, and the wheel 2 can be prevented from coming off the rail 1.

  When the intermediate equalizer beam 6 extends in the height direction and then moves downward due to its own weight, the flexible member 30 is pulled to pull the first link member 21 and the second link. The distance that the lower side of the member 22 leaves is limited. Accordingly, the swing of the first link member 21 and the second link member 22 can be limited with a simple configuration.

  FIG. 8 is a view showing an example in which the restricting mechanism in the embodiment of the derailment prevention device for a cargo handling machine and the seismic isolation support device for a traveling crane according to the present invention is the locking pieces 31 and 32. 8A is a side view, FIG. 8B is a perspective view, and FIG. 8C is a VIIIC-VIIIC cross-sectional view of FIG. 8A. In FIG. 8, the same reference numerals as those in FIGS. 1 to 6 denote the same components, and the basic configuration is the same as that shown in FIGS.

  In the example shown in FIG. 8, the limiting mechanism is configured by forming locking pieces 31 and 32 that can be engaged and disengaged from each other on the first link member 21 and the second link member 22, respectively.

  In the example shown in FIG. 8, when a huge earthquake occurs and the excitation force is large, the wheel 2 of the sea-side support leg 101 and the wheel 2 of the land-side support leg 101 (see FIG. 5) Although they try to float alternately, movement in a direction in which the lower sides of the first link member 21 and the second link member 22 approach is allowed as the locking pieces 31 and 32 are separated from each other. As a result, the intermediate equalizer beam 6 extends in the height direction, and the wheel 2 can be prevented from coming off the rail 1.

  When the intermediate equalizer beam 6 extends in the height direction and then moves downward due to its own weight, the locking pieces 31 and 32 are engaged with each other so that the first link member 21 and the first link member 21 are engaged with each other. The distance that the lower side of the second link member 22 is separated is limited. Accordingly, the swing of the first link member 21 and the second link member 22 can be limited with a simple configuration. In addition, since the locking pieces 31 and 32 can set a wide contact area for receiving the load, the surface pressure can be kept low.

  FIG. 9 is a side view showing an example in which the restricting mechanisms 33 and 34 are used as the restricting mechanism in the embodiment of the derailment prevention device for a cargo handling machine and the seismic isolation support device for a traveling crane of the present invention. 9, the parts denoted by the same reference numerals as in FIGS. 1 to 6 represent the same items, and the basic configuration is the same as that shown in FIGS.

  In the example shown in FIG. 9, one end of the restriction links 33 and 34 is rotatably attached to the first link member 21 and the second link member 22 by pins 35 and 36, respectively. The other end is connected by a connecting pin 37, and a restricting mechanism is configured by attaching to the second link member 22 a link stopper 38 that prevents the restricting links 33, 34 from being arranged in a straight line. . Further, the lower side of the first link member 21 and the lower side of the second link member 22 are brought closer to each other between the connecting pin 37 of the restriction links 33 and 34 and the rocker pin 5 as the connecting member. A restoring spring 39 for applying an elastic force is provided. The link stopper 38 may be attached to the first link member 21 instead of being attached to the second link member 22. Further, the link stopper 38 may be attached to both the first link member 21 and the second link member 22.

  In the example shown in FIG. 9, when a huge earthquake occurs and the excitation force is large, the wheel 2 of the sea-side support leg 101 and the wheel 2 of the land-side support leg 101 (see FIG. 5) Although it tries to float up alternately, the movement in the direction in which the lower side of the first link member 21 and the second link member 22 approach is allowed because the limit links 33 and 34 are bent downward at the connecting pin 37 portion. Is done. As a result, the intermediate equalizer beam 6 extends in the height direction, and the wheel 2 can be prevented from coming off the rail 1. Here, if the link stopper 38 is not provided and the limit links 33 and 34 are arranged in a straight line, the limit links 33 and 34 may not be easily bent at the connecting pin 37 when an earthquake occurs. . However, the limit links 33 and 34 are not arranged in a straight line by the link stopper 38, but are held at a certain angle as shown in FIG. The middle part equalizer beam 6 is not hindered from extending in the height direction.

  When the intermediate equalizer beam 6 extends in the height direction and then moves downward due to its own weight, the restricting links 33 and 34 are pulled against each other and come into contact with the link stopper 38 to thereby The distance that the one link member 21 and the lower side of the second link member 22 are separated is limited. Accordingly, the swing of the first link member 21 and the second link member 22 can be limited with a simple configuration.

  In addition, since the restoring spring 39 is disposed between the connecting pin 37 of the restriction links 33 and 34 and the rocker pin 5 as the connecting member, the spring force of the restoring spring 39 swings the rocker pin 5. It assists in swinging so that the lower side of the first link member 21 and the second link member 22 approaches as a moving center. Accordingly, even if the acceleration of the support leg 101 rising is large, the restoring spring 39 swings the first link member 21 and the second link member 22 so that their lower sides approach each other. It is possible to more effectively prevent the wheels 2 of the beam 11 from coming off the rail 1. Further, since the restoring spring 39 can be attached radially away from the rocker pin 5 in the radial direction, a spring having a lower spring constant than the compression coil spring 24 disposed along the rocker pin 5 is used. be able to. Furthermore, since the degree of freedom regarding the installation position of the restoring spring 39 is increased, the space inside the intermediate equalizer beam 6 can be used effectively.

  FIG. 10 is a side view showing an example in which the linear motion rod 40 is used as the limiting mechanism in the embodiment of the derailment prevention device for a cargo handling machine and the seismic isolation support device for a traveling crane of the present invention. 10, the parts denoted by the same reference numerals as in FIGS. 1 to 6 represent the same items, and the basic configuration is the same as that shown in FIGS.

  In the example shown in FIG. 10, one end of the linear motion rod 40 is attached to the first link member 21 with a pin 41 so that the other end extends toward the second link member 22, and the other end of the linear motion rod 40 is attached. A limiting mechanism is configured by providing a flange 40a and providing a rod stopper 42 on the second link member 22 so as to be freely engageable and disengageable with respect to the flange 40a. One end of the linear rod 40 is attached to the second link member 22 with a pin 41 so that the other end extends toward the first link member 21, and a flange 40a is provided at the other end of the linear rod 40, A limiting mechanism may be configured by providing a rod stopper 42 on the first link member 21 so as to be freely engageable and disengageable with respect to the flange 40a.

  In the example shown in FIG. 10, when a huge earthquake occurs and the excitation force is large, the wheel 2 of the support leg 101 on the sea side and the wheel 2 (see FIG. 5) of the support leg 101 on the land side are separated from the rail 1. Although it tries to float up alternately, the movement of the first link member 21 and the lower side of the second link member 22 in the direction in which the flange 40a of the linear rod 40 is detached from the rod stopper 42 is allowed. The As a result, the intermediate equalizer beam 6 extends in the height direction, and the wheel 2 can be prevented from coming off the rail 1.

  When the intermediate equalizer beam 6 extends in the height direction and then moves downward due to its own weight, the flange 40a of the linear rod 40 is engaged with the rod stopper 42 so that the first equalizer beam 6 is engaged. The distance that the link member 21 and the second link member 22 are separated from each other is limited. Accordingly, the swing of the first link member 21 and the second link member 22 can be limited with a simple configuration.

  FIG. 11 is a view showing an example in which the damping device in the embodiment of the unloading prevention device for a cargo handling machine and the seismic isolation support device for a traveling crane according to the present invention is an elastic-plastic brace 43. FIG. 11A is a side view, FIG. 11B is a view taken along arrow XIB-XIB in FIG. 11A, and FIG. 11C is a perspective view of the ratchet mechanism 45. 11, the same reference numerals as those in FIGS. 1 to 6 denote the same components, and the basic configuration is the same as that shown in FIGS.

  In the example shown in FIG. 11, one end of the elastoplastic brace 43 is attached to the first link member 21 with a pin 44, and the other end of the elastoplastic brace 43 is connected to the second link member 22 via the ratchet mechanism 45. Thus, an attenuation device is configured. The ratchet mechanism 45 is rotatably attached to the second link member 22 by a pin 47 so as to engage with a rack 46 formed at the other end of the elastic-plastic brace 43 and the teeth of the rack 46. Claw member 48. The other end of the elastic-plastic brace 43 is slidably supported on a support plate 49 attached to the second link member 22. The teeth of the rack 46 are formed so as to incline toward one end side (left side in FIG. 11) of the elastic-plastic brace 43. As a result, when the elastoplastic brace 43 moves to the right in FIG. 11 with respect to the claw member 48, the claw member 48 gets over the teeth of the rack 46, so that the movement of the elastoplastic brace 43 is hindered. Not to be. On the other hand, when the elastoplastic brace 43 tries to move to the left side of FIG. 11 with respect to the claw member 48, the claw member 48 bites into the teeth of the rack 46, so that the movement of the elastoplastic brace 43 is prevented. It has become so. In addition, one end of the elastoplastic brace 43 is attached to the second link member 22 with a pin 44, and the other end of the elastoplastic brace 43 is connected to the first link member 21 via a ratchet mechanism 45, whereby a damping device is obtained. May be configured.

  In the example shown in FIG. 11, when a huge earthquake occurs and the excitation force is large, the wheels 2 of the sea side support legs 101 and the wheels 2 of the land side support legs 101 are alternately lifted from the rail 1. The movement in the direction in which the lower side of the first link member 21 and the second link member 22 approaches is the movement in which the elastic-plastic brace 43 slides to the right in FIG. 11 with respect to the claw member 48 of the ratchet mechanism 45. The claw member 48 gets over the teeth of the rack 46. For this reason, the movement of the elastic-plastic brace 43 is not hindered, and the ratchet mechanism 45 is allowed to move in the direction in which the lower sides of the first link member 21 and the second link member 22 approach. As a result, the intermediate equalizer beam 6 extends in the height direction, and the wheel 2 can be prevented from coming off the rail 1.

  When the intermediate equalizer beam 6 extends in the height direction and then moves downward due to its own weight, the lower side of the first link member 21 and the second link member 22 move away from each other. At this time, the elastic-plastic brace 43 tends to move to the left side of FIG. 11 with respect to the claw member 48 of the ratchet mechanism 45. However, since the claw member 48 bites into the teeth of the rack 46, the movement of the elastic-plastic brace 43 is prevented. When the elastic-plastic brace 43 is pulled and yielded due to the restraint by the ratchet mechanism 45, energy is absorbed by the elastic-plastic brace 43, and the first link member 21 and the second link member 22 are shaken. Acts to damp movements. Thereby, the elastic-plastic brace 43 can relieve the impact load acting on the middle equalizer beam 6 from the upper equalizer beam 4.

  Further, after energy absorption is performed by the extension of the elastic-plastic brace 43, the distance that the lower side of the first link member 21 and the second link member 22 are separated by the elastic-plastic brace 43 is limited. That is, the elastic-plastic brace 43 as the damping device also functions as the limiting mechanism, and the swing of the first link member 21 and the second link member 22 can be limited with a simple configuration. The elasto-plastic brace 43 after energy absorption is replaced with a new one and set again.

  12 is a side view showing an example in which the damping device in the example of FIG. 12, parts denoted by the same reference numerals as those in FIG. 10 represent the same items, and the basic configuration is the same as that shown in FIG.

  In the example shown in FIG. 12, instead of the hydraulic damper 23 of FIG. 10, the damping device is configured by providing the eccentric cam 50 on the second link member 22 so as to contact the linear motion rod 40 of the limiting mechanism. . The eccentric cam 50 is rotatably attached to the second link member 22 by a pin 51 so as to hold the linear rod 40 from above and below. Thereby, when the linear motion rod 40 moves to the right side in FIG. 12, the two eccentric cams 50 rotate so as to open up and down, so that the movement of the linear motion rod 40 is not hindered. ing. On the other hand, when the linear motion rod 40 moves to the right side in FIG. 11 and then moves to the left side to the original position, the two eccentric cams 50 are pivoted so as to close up and down, and the linear motion rod 40 is moved. Therefore, the movement of the linear motion rod 40 is subjected to frictional resistance. One end of the linear rod 40 is attached to the second link member 22 with a pin 51 so that the other end extends toward the first link member 21, and a flange 40a is provided at the other end of the linear rod 40, By providing a rod stopper 42 on the first link member 21 so as to be freely engageable and disengageable with respect to the flange 40a, a limiting mechanism is formed and the first link member is brought into contact with the direct acting rod 40 of the limiting mechanism. A damping device may be configured by providing the eccentric cam 50 at 21.

  In the example shown in FIG. 12, when a huge earthquake occurs and the excitation force is large, the wheel 2 of the sea-side support leg 101 and the wheel 2 of the land-side support leg 101 (see FIG. 5) Although it tries to float up alternately, the movement in the direction in which the lower side of the first link member 21 and the second link member 22 approaches is a movement in which the linear rod 40 slides to the right side in FIG. The eccentric cam 50 rotates so as to open up and down. For this reason, the movement of the linear motion rod 40 is not hindered, and further, the flange 40a of the linear motion rod 40 is detached from the rod stopper 42, whereby the lower side of the first link member 21 and the second link member 22 is Movement in the direction of approach is allowed. As a result, the intermediate equalizer beam 6 extends in the height direction, and the wheel 2 can be prevented from coming off the rail 1.

  When the intermediate equalizer beam 6 extends in the height direction and then moves downward due to its own weight, the lower side of the first link member 21 and the second link member 22 move away from each other. At this time, the linear rod 40 tends to move to the left side of FIG. However, since the two eccentric cams 50 are pivoted so as to close up and down and come into close contact with the linear motion rod 40, the movement of the linear motion rod 40 receives frictional resistance, and the first link member 21 and the second link It acts to attenuate the swing of the member 22. As a result, the eccentric cam 50 in contact with the linear motion rod 40 can relieve the impact load acting on the intermediate equalizer beam 6 from the upper equalizer beam 4. Further, when the flange 40a of the linear motion rod 40 is engaged with the rod stopper 42, the distance that the lower side of the first link member 21 and the second link member 22 are separated is limited. Accordingly, the swing of the first link member 21 and the second link member 22 can be limited with a simple configuration.

  In the present invention, as described above, the limiting mechanism may include the flexible member 30 that connects the first link member 21 and the lower side of the second link member 22. In this case, the flexible member 30 is allowed to move so that the lower side of the first link member 21 and the second link member 22 are allowed to approach, and the flexible member 30 is pulled to The distance that the first link member 21 and the lower side of the second link member 22 are separated is limited. The flexible member 30 is easily available and easy to handle, thereby limiting the swing of the first link member 21 and the second link member 22 with a simple configuration.

  In the present invention, the restricting mechanism may include locking pieces 31 and 32 formed on the first link member 21 and the second link member 22 so as to be engaged and disengaged from each other. In this case, when the locking pieces 31 and 32 are separated from each other, movement in a direction in which the lower sides of the first link member 21 and the second link member 22 approach is allowed, and the locking pieces 31 and 32 are engaged with each other. By combining, the distance that the lower side of the first link member 21 and the second link member 22 are separated is limited. Since the locking pieces 31 and 32 can set a large contact area for receiving a load, the contact pressure can be suppressed low, which is effective.

  In the present invention, the limit mechanism includes a limit link 33 in which one end is rotatably attached to each of the first link member 21 and the second link member 22 and the other end is connected by a connecting pin 37. , 34 and a link stopper 38 for preventing the restriction links 33, 34 from being arranged in a straight line. In this case, the restriction links 33, 34 are bent at the connecting pin 37, so that the movement in the direction in which the first link member 21 and the lower side of the second link member 22 approach is allowed. The distance between the first link member 21 and the lower side of the second link member 22 is limited by being pulled together and contacting the link stopper 38. Accordingly, the swing of the first link member 21 and the second link member 22 can be limited with a simple configuration of the limit links 33 and 34.

  In the present invention, the limiting mechanism has one end attached to one of the first link member 21 and the second link member 22 and the other end connected to the first link member 21 and the second link member. 22, a linear motion rod 40 extending to the other side, a flange 40a provided at the other end of the linear motion rod 40, and the first link member so as to be freely engageable and disengageable with respect to the flange 40a. 21 and a rod stopper 42 provided on the other of the second link members 22. In this case, when the flange 40a of the linear motion rod 40 is detached from the rod stopper 42, the movement in the direction in which the lower side of the first link member 21 and the second link member 22 approaches is allowed, and the rod stopper 42 The distance by which the lower side of the first link member 21 and the second link member 22 are separated by the engagement of the flange 40a of the linear motion rod 40 is limited. Accordingly, the swing of the first link member 21 and the second link member 22 can be limited with a simple configuration in which the rod stopper 42 is engaged with the flange 40a of the linear motion rod 40.

  Furthermore, in this invention, providing the elastic member which provides an elastic force in the direction which brings the lower side of the said 1st link member 21 and the lower side of the said 2nd link member 22 close | closed means that the wheel 2 remove | deviates from the rail 1. Effective in preventing.

  In the present invention, the elastic member is a compression coil spring disposed on the upper side of the rocker pin 5 as a connecting member so as to apply an elastic force in a direction in which the lower side of the first link member 21 and the second link member 22 are brought closer to each other. 24. As a result, the wheel 2 of the support leg 101 of the traveling crane 100 is urged to the rail 1 by the spring force of the compression coil spring 24, and even if the rising acceleration of the support leg 101 is large, the wheel 2 is compressed following this. The coil spring 24 can be swung so that the lower side of the first link member 21 and the second link member 22 approach each other, and the wheel 2 can be more effectively prevented from coming off the rail 1.

  Moreover, in this invention, it arrange | positions between the connection pin 37 of the said limit links 33 and 34, and the rocker pin 5 as said connection member, and the lower side of said 1st link member 21 and said 2nd link member 22 of A restoring spring 39 that applies an elastic force in a direction in which the lower side approaches may be provided. Accordingly, even if the acceleration of the support leg 101 rising is large, the restoring spring 39 swings the first link member 21 and the second link member 22 so that their lower sides approach each other. It is possible to more effectively prevent the wheels 2 of the beam 11 from coming off the rail 1. Further, since the restoring spring 39 can be attached radially away from the rocker pin 5 in the radial direction, a spring having a lower spring constant than the compression coil spring 24 disposed along the rocker pin 5 is used. be able to. Furthermore, since the degree of freedom regarding the installation position of the restoring spring 39 is increased, the space inside the intermediate equalizer beam 6 can be used effectively.

  Furthermore, in the present invention, it is provided with a damping device that generates a damping force when the lower side of the first link member 21 and the second link member 22 move away from each other. This is effective in reducing the impact load generated when returning to the state of time.

  In the present invention, the damping device is attached between the first link member 21 and the second link member 22, and movement in a direction in which the lower side of the first link member 21 and the second link member 22 approaches is allowed. And it can be set as the damper (for example, hydraulic damper 23) in which a damping force acts in the direction which the lower side of said 1st link member 21 and said 2nd link member 22 leaves | separates. The damper is very stable in operation, acts to attenuate the swing of the first link member 21 and the second link member 22, and an impact load acting on the middle equalizer beam 6 from the upper equalizer beam 4. Can be relieved.

  In the present invention, the damping device is attached between the first link member 21 and the second link member 22 and moves in a direction in which the lower side of the first link member 21 and the second link member 22 approach each other. Is allowed by a ratchet mechanism 45, and in the direction in which the lower side of the first link member 21 and the second link member 22 is separated, an elastic-plastic brace that absorbs energy by elongation after yielding accompanying pulling by restraint by the ratchet mechanism 45. 43. The elasto-plastic brace 43 can be installed at a low cost, and the impact load acting on the intermediate equalizer beam 6 from the upper equalizer beam 4 can be reduced. Further, after energy absorption is performed by the extension of the elastic-plastic brace 43, the distance that the lower side of the first link member 21 and the second link member 22 are separated by the elastic-plastic brace 43 is limited. That is, the elastic-plastic brace 43 as the damping device also functions as the limiting mechanism, and the swing of the first link member 21 and the second link member 22 can be limited with a simple configuration.

  Furthermore, in this invention, the eccentric cam 50 provided in either one of the said 1st link member 21 and the said 2nd link member 22 so that it may contact | abut to the linear motion rod 40 of the said limitation mechanism can be provided. In this case, movement of the first link member 21 and the lower side of the second link member 22 toward each other is allowed by the rotation of the eccentric cam 50 with respect to the linear motion rod 40, and the first link member 21 and the second link member 22 are allowed to move. In the direction in which the lower side of the link member 22 is separated, a damping device that generates a damping force by the frictional resistance of the eccentric cam 50 with respect to the linear motion rod 40 can be configured. As a result, the eccentric cam 50 in contact with the linear motion rod 40 can relieve the impact load acting on the intermediate equalizer beam 6 from the upper equalizer beam 4.

  In addition, the derailment prevention device for a cargo handling machine and the seismic isolation support device for a traveling crane of the present invention are not limited to the above-described embodiments. For example, in the present embodiment, the case has been described in which the middle equalizer beam is configured to have a derailment prevention function. However, the upper equalizer beam is provided with a similar derailment prevention function in place of the middle equalizer beam. Anyway. In the present embodiment, the case where the present invention is applied to a traveling crane has been described. However, the present invention may be applied to a cargo handling machine such as an unloader. The derailment prevention device for a cargo handling machine and the seismic isolation support device for a traveling crane of the present invention can be variously modified without departing from the scope of the present invention.

1 rail 2 wheel 5 rocker pin (connecting member)
6 Middle part equalizer beam (equalizer beam)
21 First link member 21c Pin (restriction mechanism)
21d Fixing base 22 Second link member 22c Restriction hole (restriction mechanism)
23 Hydraulic damper (damper) (damping device)
24 Compression coil spring (elastic member)
30 Flexible member (limitation mechanism)
31 Locking piece (restriction mechanism)
32 Locking piece (restriction mechanism)
33 Restriction link (restriction mechanism)
34 Restriction link (restriction mechanism)
37 Connecting pin 38 Link stopper (limitation mechanism)
39 Restoration spring 40 Linear motion rod (restriction mechanism)
40a Flange 42 Rod stopper (Limiting mechanism)
43 Elasto-plastic brace (damping device)
45 Ratchet mechanism (attenuator)
50 Eccentric cam (attenuator)
100 traveling crane (loading machine)
101 Supporting Leg 102 Traveling Device

Claims (14)

A traveling device that travels on a rail is a derailment prevention device for a cargo handling machine provided on a support leg,
The traveling device includes at least one equalizer beam supported to be swingable with respect to an upper member,
The equalizer beam is
A first link member constituting one side of the traveling direction;
A second link member constituting the other side of the traveling direction;
A connecting member for connecting the first link member and the upper side of the second link member so that the lower side of the first link member and the second link member can freely approach and separate along the traveling direction;
A derailment prevention device for a cargo handling machine, comprising: a limiting mechanism that limits a distance at which the first link member and the lower side of the second link member are separated from each other at a position below the connecting member. The limiting mechanism is
A pin provided on one of the first link member and the second link member;
A restriction hole formed on either one of the first link member and the second link member and slidably fitted with the pin;
The apparatus according to claim 1, wherein a distance that the lower side of the first link member and the second link member are separated is limited by the pin being in contact with the end of the restriction hole. The limiting mechanism is
A flexible member connecting the lower side of the first link member and the second link member;
The flexible member is allowed to move so that the lower side of the first link member and the second link member approach each other, and the flexible member is pulled to pull the first link member and the first link member. The apparatus for preventing a wheel from coming off of a cargo handling machine according to claim 1, wherein a distance by which a lower side of the two link members is separated is limited. The limiting mechanism is
The first link member and the second link member are each provided with a locking piece formed to be able to engage and disengage from each other,
Movement of the first link member and the lower side of the second link member toward each other is allowed when the locking pieces are separated from each other, and when the locking pieces are engaged with each other, the first link member and the second link member are allowed to move. The apparatus according to claim 1, wherein a distance by which the lower side of the second link member is separated is limited. The limiting mechanism is
One end of each of the first link member and the second link member is rotatably attached, and each other end is connected by a connecting pin,
A link stopper for preventing the restriction link from being arranged in a straight line,
The limit link bends at the connecting pin portion to allow movement in the direction in which the lower side of the first link member and the second link member approach, and the limit link is pulled against each other to abut against the link stopper. The apparatus for preventing a wheel from removing a wheel of a cargo handling machine according to claim 1, wherein a distance between the first link member and a lower side of the second link member is limited. The limiting mechanism is
A linear motion rod having one end attached to one of the first link member and the second link member and the other end extending to the other side of the first link member and the second link member;
A flange provided at the other end of the linear rod;
A rod stopper provided on the other of the first link member and the second link member so as to be freely engageable and disengageable with respect to the flange;
The movement of the first link member and the lower side of the second link member approaching each other is allowed by the separation of the flange of the linear rod from the rod stopper, and the flange of the linear rod is engaged with the rod stopper. The apparatus of claim 1, wherein the distance between the lower side of the first link member and the second link member is limited.   The wheel removal machine derailment according to any one of claims 1 to 6, further comprising an elastic member that applies an elastic force in a direction in which the lower side of the first link member and the lower side of the second link member are brought closer to each other. Prevention device. The elastic member is
The anti-wheel-removal device for a cargo handling machine according to claim 7, wherein the device is a compression coil spring disposed on the upper side of the connecting member so as to apply an elastic force in a direction in which the first link member and the lower side of the second link member are brought closer to each other.   And a restoring spring that is disposed between the connecting pin of the restriction link and the connecting member and applies an elastic force in a direction in which the lower side of the first link member and the lower side of the second link member are brought closer to each other. 5. A device for preventing wheel-removal of a cargo handling machine according to 5.   The anti-wheel-rolling prevention of the cargo handling machine according to any one of claims 1 to 9, further comprising a damping device that generates a damping force when the lower side of the first link member and the second link member move away from each other. apparatus. The attenuation device comprises:
The first link member and the second link member are attached between the first link member and the second link member, and the first link member and the second link member are allowed to move in a direction in which the lower side of the first link member and the second link member approaches. 11. The apparatus for preventing a wheel from falling off according to claim 10, wherein the damper is a damper in which a damping force acts in a direction in which a lower side of the cargo is separated. The attenuation device comprises:
It is attached between the first link member and the second link member, and a movement in a direction in which the lower side of the first link member and the second link member approaches is permitted by a ratchet mechanism, and the first link member and the first link member 11. The anti-wheel-removal prevention device for a cargo handling machine according to claim 10, wherein the two-link member is an elastic-plastic brace that absorbs energy by extension after yielding due to pulling by restraint by the ratchet mechanism in a direction in which the lower side of the two link members is separated. An eccentric cam provided on the other of the first link member and the second link member so as to contact the linear motion rod of the restriction mechanism;
The movement of the lower side of the first link member and the second link member is permitted by the rotation of the eccentric cam with respect to the linear motion rod, and the lower side of the first link member and the second link member are separated from each other. The apparatus according to claim 6, wherein a damping device that generates a damping force by a frictional resistance of an eccentric cam with respect to the linear motion rod is configured. A traveling device that travels on a rail is a seismic isolation support device for a traveling crane provided on a support leg,
The traveling device includes at least one equalizer beam supported to be swingable with respect to an upper member,
The equalizer beam is
A first link member constituting one side of the traveling direction;
A second link member constituting the other side of the traveling direction;
A connecting member that connects the first link member and the upper side of the second link member so that the lower side of the first link member and the second link member can approach or leave along the traveling direction;
A seismic isolation support device for a traveling crane, comprising: a limiting mechanism that limits a distance of the lower side of the first link member and the second link member away from each other at a position lower than the connection member.

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