JP3403154B2 - Unlocking device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to unlocking means for releasing the connection state between members, for example, a device for unlocking a locking device for stopping a ground-working working machine at a fixed position when an earthquake occurs. The present invention relates to an unlocking device that is suitable for use.

[0002]

2. Description of the Related Art In a large-sized work machine that travels on an orbit, a work machine is used in order to prevent the work machine from running away when the work is stopped and the work is stopped or the work is stopped at night or during a storm. In addition to the brake of its own running system, locking means such as a drop-in type stopper pin or rail clamp is provided to lock the locking means to reliably prevent runaway.

FIG. 13 is a side view showing an example of a track traveling type working machine having a conventional locking means. Reference numeral 60 is a sill beam of the working machine body, 61 is a traveling device mounted at a corner of the sill beam 60, and 62 is a track 61 of the traveling device 61.
a is a rail clamp carriage type locking means connected to a with a horizontal connecting pin 63, 64 is a pin drop-down type locking means provided with a stopper pin 64b on a supporting frame 64a projecting downward from the sill beam 60, and 65 is a traveling likewise. It is a drop-in type locking means in which a stopper pin 65b is provided on a support frame 65a protruding downward from the equalizer beam 61b of the device 60. The rail clamp type locking means 62 and the pin dropping type locking means 64, 65 as described above are provided alone or in an appropriate combination.

However, when an earthquake occurs while the work machine is in operation or stopped and a strong seismic force acts on the work machine,
When the locking means is locked, a large horizontal force acts on the upper side of the work machine due to the restraining force of the locking means, and the work machine is lifted, which may cause wheel breakage or damage. In order to avoid this fear, conventionally, the connecting pin 63 and the stopper pins 64b and 65b of the locking means are shown in FIGS. 14 and 15, respectively.
It is configured in a sheer pin format like. In the case of the locking means 64 and 65 of the pin drop type in FIG.
With the stopper pins 64b and 65b being dropped into the money receiver 67 of the base 66, the money receiver 67 and the support frames 64a and 6
The groove-shaped small diameter portion 68 is formed on the outer periphery of the pins 64b and 65b in the space between the stopper pin 64b and 65b, and the stopper pins 64b and 65b are cut by the groove-shaped small diameter portion 68 with an earthquake impact force of a set value or more.

Further, in FIG. 15, in the case of the rail clamp type locking means 62, a groove-shaped small diameter is formed on the outer peripheral portion of the horizontal connecting pin 63 between the track 61a side connecting material and the rail clamp type locking means 62 side connecting material 62a in the connected state. Forming part 68,
When the seismic impact force exceeds the set value, the connecting pin 63 becomes the groove-shaped small diameter part 6
It is configured to be cut at 8.

[0006]

However, in releasing the restraint force of each locking means by this method, if the shear pin cutting strength is set so as to react sensitively to the seismic force, the connecting pin 63, Stopper pins 64b, 65
b may be easily cut. Also, it is difficult to set the shear pin cutting strength accurately. Therefore, there is a problem that the restraining force of the locking means cannot be effectively released against the seismic force. In addition to this, a configuration in which the locking means is unlocked by electrically detecting seismic intensity is also conceivable.
Since there is a possibility of blackouts in the event of an earthquake, it was not always sufficient to ensure reliable unlocking.

The present invention has been made in view of the above circumstances, and when an earthquake of an arbitrary scale occurs, even if a power failure occurs, the coupling between members can be easily and reliably released. The purpose is to provide an unlocking device.

[0008]

The present invention adopts the following means in order to solve the above problems. That is, the unlocking device according to claim 1 mechanically detects the seismic force and
As a trigger, a work machine that runs on the ground and a lock to prevent runaway
A device for releasing the connection with the means, said trigger
Is activated when the seismic force exceeds the set strength.
It is a pendulum, and this pendulum serves as a magnetic force means for attracting the pendulum.
Depending on whether the behavior is restricted or permitted
It is characterized as being Noh. According to claim 1,
According to the unlocking device, when an earthquake occurs, the seismic force
Acts on and tilts or oscillates the seismic force
Can be detected mechanically. In addition, the
If there is a risk of external force being applied to the pendulum during normal use,
Select the pendulum restraint by force means
It can be temporarily restrained and its malfunction can be surely prevented.
It Also, select to release the pendulum constraint by the magnetic means.
The pendulum can be affected by the seismic force when the earthquake occurs.
It is possible to unlock the connection between the members.
Growls And because it detects the seismic force mechanically,
In the event of an earthquake of any magnitude, there will be no power outage.
Even if the work machine escape lock is securely locked
It can be unlocked.

The unlocking device according to a second aspect of the present invention mechanically applies seismic force.
Work that is detected on the ground and uses this as a trigger to drive on the ground
A device that releases the connection between the machine and the locking device for escape prevention.
Yes, the trigger receives the seismic force above the set strength.
Is a pendulum that operates when the
Behavior is restricted or not allowed by
It is characterized in that it can be selected at a time. the above
According to the unlocking device of claim 2, when an earthquake occurs, the
Seismic force acts on the pendulum and tilts or swings it
Therefore, the seismic force can be detected mechanically. Well
In addition, there is a risk of external force applied to the pendulum during normal use other than an earthquake.
In some cases, restrictive means to choose pendulum restraints
This temporarily restrains the pendulum and prevents its malfunction.
You can stop. In addition, the pendulum restraint by the regulation means
If you choose to cancel, the pendulum will be
Being able to behave under force, unlocks the bond between members
Will be able to And mechanically apply seismic force
Detects when an earthquake of any magnitude occurs.
Even if there is a power outage, a locking hand to prevent the work machine from running away
It is possible to surely unlock the step lock.

The unlocking device according to claim 3 is the same as that of claim 1.
The unlocking device according to claim 2, wherein:
Connecting connection for connecting between the escape prevention locking means
Locking part that holds the pin in the connected state and
An inverted pendulum that tilts when the seismic force is detected, and
By pulling out the connecting pin in conjunction with the tilting of the standing pendulum
The interlocking part that unlocks the locked state is provided.
Characterize. According to the unlocking device of claim 3, the contract
The effect of claim 1 or claim 2 can be reliably obtained.
It

The unlocking device according to claim 4 is the same as that of claim 1.
The unlocking device according to claim 2, wherein the escape prevention is provided.
For the receipt of the locking means at the above-mentioned key point on the ground
A locking pin that can be automatically inserted is inserted into the receiving plate.
Locking part to keep in locked state and the seismic force above the set strength
And an inverted pendulum that tilts when it detects
The locking state can be obtained by pulling out the locking pin in conjunction with tilting.
And an interlocking part for releasing the state.
It According to the unlocking device according to claim 4, the unlocking device according to claim 1
Alternatively, the function of claim 2 can be obtained reliably.

[0012]

[0013]

[0014]

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is an unlocking means for releasing a connection state between members, and respective embodiments thereof will be described below with reference to the drawings, but the present invention is construed as being limited thereto. Of course, it's not something. First below
In the third embodiment, a case where the unlocking device of the present invention is applied to a vibration-isolated crane will be described, but the present invention is not limited to this and is applied to other working machines such as a pneumatic unloader and a continuous unloader. Of course, it is possible to configure it.

[First Embodiment] FIG. 1 is a view showing a first embodiment of an unlocking device according to the present invention, in which the legs around a vibration-isolated crane equipped with the unlocking device are installed. It is a side view.
FIG. 2: is a figure which shows the same unlocking device, and is an I section enlarged view of FIG. FIG. 3 is a plan view of the unlocking device as viewed from the direction of arrows II to II in FIG. 2. FIG. 4 shows the unlocking device of FIG.
FIG. 2 is a vertical sectional view seen from the direction of arrow II. FIG. 5 is a plan cross-sectional view of the unlocking device as seen from arrows IV to IV in FIG. 4. FIG. 6 is a view showing a main part of the unlocking device and is an enlarged view of a V part in FIG. 4. In the present embodiment, the case where the unlocking means of the present invention is configured as an unlocking device that releases the locking of the rail clamp type locking means (departure prevention locking means) of the ground-based vibration-isolated crane An example will be described.

1 to 3, 1 is a sill beam of a vibration isolation type crane, 2 is a traveling device mounted at each corner of the sill beam 1, 2a is a truck of the traveling device, 2b is an equalizer beam, and 3 is a sill beam 1. The pin-locking type locking means mounted is 4, a traveling rail of a vibration-isolating crane, 5 is a rail clamp carriage type locking means, and 6 is an unlocking device of the locking means 5. The rail clamp trolley type locking means 5 is guided from the support frame 3a of the pin drop type locking means 3 to the guide members 7 extending horizontally along both sides of the rail clamp trolley so that the rail clamp 4 can travel on the rail 4, A hole 9 (see FIG. 4) for connecting a vertical pin to the unlocking device 6 side is provided on a flat plate 8 extending in the opposite direction on the rail 4 from the clamp carriage.

The unlocking device 6 includes a main body frame 11 connected to and supported by a support bracket 10 at the end of the track 2a, and a connecting seat extending below the main body frame 11 so as to wrap the flat plate 8 on the rail clamp truck side. It is composed of a plate 12, a connecting vertical hole 13 (see FIG. 4) provided near the tip of the connecting seat plate 12, a connecting pin 14, and a locking / releasing mechanism 15 (see FIG. 4) of the connecting pin 14. There is.

In FIG. 4, the locking / releasing mechanism 15 is a tension coil spring for automatic pulling up of the connecting pin 14 connected between the connecting pin 14 and the eye block 17 which is detachably fixed to the upper portion of the main body frame 11 by the set pin 16. 18, a horizontal pin hole 19 formed in the connecting pin 14, and a horizontal pin hole 1 at the tip.
9, a connecting pin 14 provided with a protruding pin 20 (locking portion) that is attached to and detached from, a horizontal rod 21 for locking, a compression coil spring 22 that applies an automatic releasing force to the horizontal rod 21, and a horizontal rod 2
1 has a vertical lever 23 for pushing and moving it to a locked position, and a central portion from the upper side to which the body frame 11 is swingably supported by a bracket 24 and has a counterweight 25 at the rear end, which is detachable from the upper end of the vertical lever 23. And a vertical lever 23 for locking the vertical lever 23 in a locked position, and a lower end of the counter lever 26 is grounded vertically on a support base 27 on the main body frame 11 vertically below the tip end of the counter lever 26 so that the center is held and the upper end is covered by a wire 28. The counter lever 26 is composed of an inverted pendulum 29 loosely connected to the tip of the counter lever 26 for detecting seismic vibration, and a limit switch 30 for detecting locking / unlocking of the connecting pin 14.

The unlocking mechanism 1 of the unlocking device 6
5 is a connecting seat plate 12 and a rail clamp truck side flat plate 8
It is an unlocking means for releasing the connection state between the members (members), and is configured to mechanically detect the seismic force and release the connection state by using this as a trigger. The trigger employs the inverted pendulum 29 that operates when an earthquake force of a set strength or more is received.

The base end of the vertical lever 23 is the body frame 11
The horizontal rod 21 is axially supported by the upper table 31 and has an extension at the lower end.
It is designed to push in the rear end face. Also vertical lever 23
As shown in FIGS. 4 and 5, a cross pin 32 is provided on either one of the upper end or the intersecting counter lever 26, and a pin receiving portion 33 (see FIG. 3), which is a recess, is provided on the other so that both can be attached and detached. Is configured.

FIG. 6 shows an example of the configuration of the inverted pendulum 29. The inverted pendulum 29 is preferably formed in a short cylindrical shape, and the lower end of a small-diameter tubular member 34 protruding to the center of the lower end serves as a ground plane, and the coil spring 35 in the tubular member 34 projects from the lower end of the tubular member 34. The sphere 36 thus held is provided, and the wire connecting portion 37 is provided at the center of the upper end.

In the inverted pendulum 29, the sphere 36 is supported by the support base 27.
It is supported in the upper center so as to hold the center by a concave conical surface-shaped supporting portion 38, etc., and the grounding surface of the tubular member 34 is brought into contact with the flat surface portion on the support base 27 so as to stand upright, and the connecting portion 37 at the upper end. The tip ends of the counter levers 26 are loosely connected by a wire 28 to support them so that they can fall in any direction. Therefore, the unlocking device 6 of the present embodiment includes the connecting pin 14 that connects the traveling device 2 of the vibration-isolated crane (work machine) and the rail clamp trolley type locking means 5 (locking means for escape prevention). And a horizontal rod 21 (locking portion) that holds the connected state, and an inverted pendulum 29 that tilts when an earthquake force of a set strength or more is detected.
And the interlocking portion (pulling coil spring 18, counter lever 26, counterweight 2) that unlocks the locked state by pulling out the connecting pin 14 in association with the tilt of the inverted pendulum 29.
5, the bracket 24, the vertical lever 23, the base 31, and the horizontal rod 21) are the main components.

The lock release mechanism 15 and the inverted pendulum 2 described above.
The design of 9 can be changed to another appropriate configuration. That is, in the unlocking device 6 described above, by replacing the connecting pin 14 with the locking pin 54 of the pin-retracting type locking means 3, as shown in an embodiment (FIGS. 10 and 11) to be described later, The locking pin 54 can also be configured to be locked and unlocked similarly.

The rail clamp cart type locking means 5 shown in FIGS. 1 to 3 can be moved together with the vibration isolation type crane by being connected to the unlocking device 6 by the connecting pin 14. The rail clamp trolley type locking means 5 and the unlocking device 6 are connected by the operation on the unlocking device 6 side as follows.

In FIG. 4, when the unlocking device 6 manually inverts the inverted pendulum 29 on the support base 27, the weight of the inverted pendulum 29 is applied to the tip of the counter lever 26 via the wire 28 and the counter lever 26 is moved counterclockwise. The counterweight 25 side is lifted by rotating around and is disengaged from the upper end of the vertical lever 23, the pushing force of the horizontal rod 21 by the vertical lever 23 is released, and the horizontal rod 21 is automatically moved to the right by the biasing force of the compression coil spring 22. The projection pin 20 at the tip is disengaged from the horizontal hole 19 of the connecting pin 14, and the connecting pin 14 is automatically pulled up to the raised position by the tensile force of the tension coil spring 18. In this state, the vertical lever 23 automatically rotates to the dotted line position and stops at a stopper (not shown). The stopper is formed integrally with the base 31, and the projection of the lower end of the vertical lever 23 comes into contact with the stopper so that the tilting of the vertical lever 23 is stopped.

Under this state, the rail clamp cart type locking means 5 in the clamp released state is brought closer to the unlocking device 6 side so that the connecting holes 9 and 13 of both are aligned and the working chain block. The set pin 16 is removed while supporting the supporting eye block 17 part with the like, and the eye block 17 part is lowered to lower the connecting pin 14 to the locking position shown in FIG. After setting the pendulum 29 in the upright posture, the vertical lever 23 is pulled back from the position indicated by the chain double-dashed line to the vertical position, the horizontal rod 21 is pushed out, and the convex pin portion 20 is pushed into the horizontal hole 19 of the connecting pin 14 to be connected. In this state, the vertical lever 23 is automatically fitted with the counter lever 26 by the cross pin 32 and the pin receiving portion 33 to lock the connecting pin 14 at the locking position.

When the eye block 17 is pulled up by a work chain block or the like and the set pin 16 is mounted, the tension coil spring 18 extends and the unlocking device 6 enters a reset state to unlock the rail clamp carriage type locking means 5 and the unlocking means 5. The connection with the device 6 is completed. This operation is similarly performed at the time of resetting when the unlocking device 6 is automatically released by seismic vibration.
The vibration-isolated crane is a rail clamp truck type locking means 5.
Further, all the pin drop-in type locking means 3 and 65 (see FIG. 1) are released, and the operation is performed. In this case, in the unlocking device 6 shown in FIG. 4, unlocking is performed by releasing the rail clamp of the rail clamp truck type locking means 5.

Further, in the case of an unlocking device (not shown) constructed for the pin drop type locking means 3, the locking means 3 is locked by the same procedure as the reset operation of the unlocking device 6 of FIG. On the contrary, when the unlocked state is manually unlocked for the operation of the vibration-isolated crane, the pin of the drop-in type locking means 3 can be unlocked by the same operation.

When the vibration-isolated crane is operated while the vehicle is stopped or when the operation is stopped, the clamp of the rail clamp truck type locking means 5 of the vibration-isolated crane is connected to the rail 4 at the stop position or the rest position. In addition, the pin drop-in type locking means 3 locks and connects the pin 14 to prevent escape of the vibration isolation type crane due to strong wind or the like.

The inverted pendulum 29 calculates the size of the ground contact surface, the diameter, the height and the weight of the inverted pendulum according to the magnitude of the seismic vibration to be set so that the inverted pendulum 29 reacts only to the impact force peculiar to the seismic vibration and falls. It is possible to provide. As an example,
Pendulum body having a vertical cylindrical shape of 110 mmφ × 207 mm, and 40 mmφ × 9 mm from the lower end surface of the pendulum body
An inverted pendulum having a protrusion of about 15.5 kg and the like can be considered. When an earthquake occurs during the work to stop the vibration-isolated crane or while it is stopped, the unlocking device 6 is operated with the set seismic force.
The inverted pendulum 29 of FIG. 2 falls, and the lock pin 5 of the rail clamp carriage type locked by the automatic operation of the unlocking device 6 and the connecting pin 14 of the unlocking device 6 and the pin of the pin drop-in type locking device 3. Automatically released. At this time, the locking or releasing of the drop pin is detected and confirmed by the automatic reset type limit switch 30 to ensure safety.

According to the unlocking device having this structure, when an earthquake occurs while the vibration-isolated crane is stopped or running,
The locked state of the vibration-isolated crane is released with high precision in a smooth, quick and reliable manner according to the set seismic force, and the vibration-isolated crane slides on the traveling rail 4 in the wheel brake state and moves. It can absorb and mitigate the impact of seismic force. Therefore, it is possible to effectively prevent the vibration-isolated crane from being lifted up, derailed, and damaged due to the restraining force of the locking portion.

[Second Embodiment] FIG. 7 is a view showing a second embodiment of the unlocking device of the present invention, and is a side view showing the main part of the unlocking device. FIG. 8 is a side view showing a modified example of the main part of the unlocking device. In addition, FIG.
FIG. 9 is a plan sectional view of the unlocking device as seen from the arrows VI to VI in FIG. 8. The present embodiment is different from the first embodiment in that the inverted pendulum 29 is provided with a fall prevention means so as not to automatically fall due to a vibration force other than an earthquake. The description will be centered on points, and the description of the other same components will be omitted.

As described above, when the vibration-isolated crane of the first embodiment is running, the pin drop-in type locking means 3 and drop-in type locking means 65 of the vibration-isolated crane are unlocked, and The work is performed by opening the clamp of the rail clamp truck type locking means 5. At this time, for unlocking the drop-down type locking pin, the inverted pendulum 29 of the unlocking device 6 is manually overturned to automatically unlock, and the rail clamp carriage type locking means 5 is used.
However, the rail clamp is released from the rail 4 and the traveling operation is performed while the connecting pin 14 is locked in the locked position. When the traveling of the vibration-isolated crane is stopped in this state and the work is continued, it is necessary to prevent the escape of the vibration-isolated crane by connecting only the released rail clamp to the rail 4 again.

At this time, when the vibration-isolated crane is running, the inverted clamp pendulum 29 of the unlocking device 6 falls due to strong vibrations during running and the connecting pin 14 is automatically released. It is conceivable that even if it is clamped at, the restraint force will not be transmitted to the main body of the vibration-isolated crane and the vibration-isolated crane will be free to escape. 7 and 8
In order to cope with this, there are two configuration examples of the embodiment in which the unlocking device 6 for operating the connecting pin 14 is also used with a pendulum fall prevention means for preventing the inverted pendulum 29 from falling.

In the embodiment shown in FIG. 7, the behavior of the inverted pendulum 29 can be selected as either restricted or permitted by an electromagnet 40 (magnetic force means) that attracts the inverted pendulum 29. That is, the electromagnet 40 is provided in the support base 27 of the inverted pendulum 29 so as to face the lower end grounding surface of the tubular member 34 of the inverted pendulum 29, and the inverted pendulum 29 is attracted and supported by the electromagnetic force generated by energizing the electromagnet 40. The pendulum fall prevention means 39 is configured to prevent the inverted pendulum 29 from tipping over, and to stop the energization of the electromagnet 40 to eliminate the electromagnetic force so that the inverted pendulum 29 can be freely turned over.

The embodiment shown in FIG. 8 is a case where the pendulum fall prevention means 39 is mechanically constructed. 7 and 8,
The pendulum fall prevention means 39 of this embodiment supports a sideways eye plate 42 provided at an upper end portion of a bracket 41 provided on the main body frame 11 of the unlocking device 6 and a base end portion of the eye plate 42 by a connecting pin 44. The gear cylinder 43 is provided downward, the tubular body 45 with the groove is supported by a pin to the driving end of the gear cylinder 43 so as to be movable in the longitudinal direction, and the inverted pendulum is attached to the tip of the tubular body 45 with the groove. 29, a fitting portion 45a configured to be loosely attached to and detached from the upper end portion, and an elevating guide 46 for the split grooved cylinder 45 provided in the main body frame 11 of the unlocking device 6. In FIG. 9, 47 is a cylinder body 45 with a split groove.
The counter lever 26 of the unlocking device 6 passes through the split groove portion 47 into the split groove tubular body 45, and supports the inverted pendulum 29 via the wire 28.

In the apparatus having the structure shown in FIG. 7, the electromagnetic force is applied by turning on the power supply to the electromagnet 40 in conjunction with the release operation of the rail clamp, so that the inverted pendulum 29 is acted on by the fall prevention force. Inverted pendulum 29 while driving a swing crane
Since the fall of the connecting pin 14 is prevented, the connecting pin 14 can be kept in the locked position. Therefore, when the rail-clamp trolley type locking means 5 is re-joined to the rail 4 when the vibration-isolated crane is stopped and the work is continued, the constraint force of the rail clamp always passes through the connecting shaft 14 and the vibration-isolated crane. Transmitted to the side,
It is possible to reliably prevent runaway of the vibration-isolated crane.

Further, when the vibration isolation type crane is stopped, when the energization of the electromagnet 40 is turned off in conjunction with the reconnection of the rail clamps, the inverted pendulum 29 can be tumbled freely by vibrating force, that is, it can cope with the occurrence of an earthquake. Return to the state. Further, when a power failure occurs during the traveling operation of the vibration-isolated crane, the electromagnetic force of the electromagnet 40 automatically disappears in this embodiment, and the inverted pendulum 29 is similarly returned to a state in which it can freely fall by vibrating force. . Therefore, even when there is a power failure, the problem due to the provision of the electromagnet 40 does not occur, and the inverted pendulum 29 can be reliably tilted when an earthquake occurs.

Next, in the unlocking device shown in FIGS. 8 and 9, the inverted pendulum 29 has the split groove tubular body 45 for supporting the inverted pendulum 29.
Depending on (regulatory means), the behavior can be selected as either restricted or permitted. That is, when the gear cylinder 43 is driven so as to extend a certain stroke in conjunction with the release operation of the rail clamp, the tip fitting portion 45 a of the split grooved cylinder body 45 loosely fits on the upper portion of the inverted pendulum 29, and the guide 46. The inverted pendulum 29 is mechanically prevented from falling due to the lateral supporting force, and the connecting pin 14 can be kept in the locked position by this operation. Therefore, when stopping the operation of the vibration-isolated crane and continuing the work, use the rail clamp
When it is rejoined, the restraint force of the rail clamp is always transmitted to the vibration-isolated crane via the connecting pin 14, and the escape of the vibration-isolated crane can be reliably prevented. Further, when the vibration-isolated crane is stopped, it is driven so as to contract the gear cylinder 43 in conjunction with the re-connection of the rail clamps.
It is possible to return 9 to a state in which it can automatically fall by vibrating force.

[Third Embodiment] FIG. 10 is a view showing a third embodiment of the unlocking device of the present invention, and is a plan view showing a main part of the unlocking device. 11: is the side view which looked at the same unlocking device from the XX arrow of FIG. 12
[Fig. 7] is a side view of a main portion showing a modified example of the unlocking device. The present embodiment is different from the first embodiment in that it is configured as an unlocking device of a pin drop-in type locking means of a vibration-isolated crane, and therefore, this point will be mainly described. The description of the other same components will be omitted.

In FIG. 10, reference numeral 50 is a support frame for the pin drop type locking means 3 (FIG. 1) according to this embodiment, 6'is the unlocking device of this embodiment, and 53 is the unlocking device 6 '.
It is a connection plate on the side. In FIG. 11, the support frame 50
On the lower part, two pin insertion plates 5 that are horizontally extended to the left and right
1 and the pin insertion plate 51 is provided with a vertical pin insertion hole 52. The unlocking device 6 ′ is fixed to the side surface of the support frame 50 by bolts and nuts at the connecting plate 53, and is arranged so as to be aligned in the direction parallel to the rail 4. In the unlocking device 6 ', instead of the connecting pin 14 of FIG. 4, the locking pin 54 of the locking means 3 is incorporated so as to automatically unlock, and the upper and lower two seat plates 12 of the unlocking device 6'are supported by the support frame. The two pin insertion plates 51 on the side of 50 are arranged so as to be vertically overlapped with each other, and the vertical hole 13 for connection on the seat plate 12 is provided with the pin insertion holes 52 on the side of the support frame 50.
It is aligned with the same axis line as. Reference numeral 55 is a receipt fixed to the foundation.

The other structure of the unlocking device 6'is the same as that of the first embodiment (FIG. 4). Therefore, the unlocking device 6 ′ according to the present embodiment can be automatically inserted into the receiving member 55 of the pin drop locking means 3 (disengagement prevention locking means) provided at a key point on the ground. The horizontal rod 21 (locking part) that holds the locking pin 54 in the locked state by inserting it into the receiving metal 55
And an inverted pendulum 29 that tilts when an earthquake force of a set strength or more is detected, and an interlocking portion (pulling coil spring 18, which pulls the locking pin 54 in association with the tilt of the inverted pendulum 29 to release the locked state). Counter lever 26, counter weight 25, bracket 24, vertical lever 23, stand 3
1, horizontal rod 21), and the main components. The configuration of this embodiment can be similarly applied to the pin drop-in type locking means 65 below the equalizer beam 61b shown in FIG.

The initial locking of the drop-in type locking pin 54 and the locking at the time of resetting are performed in the same manner as in the case of the first embodiment, and the automatic unlocking action by the inverted pendulum 29 in the locked state,
This is similar to the case of the first embodiment. If an earthquake occurs in the locked state, the inverted pendulum 29 with the set seismic vibration force
The lock pin 54 is automatically unlocked, and the vibration-isolated crane can slide on the rail 4 in the brake-on state, and the seismic impact force applied to the vibration-isolated crane is absorbed and relaxed. It is possible to prevent damage to the vehicle, derailment, and falls. The locking pin 54 of the drop-in type locking means 3 is incorporated in the unlocking device 6'and directly locked, restrained and released, so that the device configuration and operation is the unlocking for the rail clamp carriage type locking device 5. It is simpler than the lock device.

FIG. 12 shows a modification of the essential parts of the unlocking device 6. In the figure, 21 'is a trigger rod for supporting the locking pin 54 in a locked state, 22 is a tension spring for urging the trigger rod 21' in a direction of separating it from the locking pin 54, and 25 'is a trigger rod 21. 21a 'is a universal joint that supports the support rod 21A' so that it can move freely in both vertical and horizontal directions.
1B 'is a compression spring that supports the weight of the weight 25 and the support rod 21A'. According to this modification, when an earthquake occurs and the seismic force is applied to the weight 25 ', the weight 25' is disengaged from the rear end surface of the trigger rod 21 ', so that the trigger rod 21' which has become free pulls the tension spring. Two
It is pulled out by 2 and the locking of the locking pin 54 is released. Of course, this modification can be applied to the first and second embodiments.

As described above, in the above-described first to third embodiments, the case where the unlocking device of the present invention is applied to the vibration-isolated crane has been described, but the present invention is not limited to this, and a pneumatic unloader or A configuration applicable to other work machines such as a continuous unloader is also possible.

[0047]

According to the unlocking device of the first aspect of the present invention.
For example, when an earthquake occurs, the seismic force acts on the pendulum and
Since it tilts or swings, it can detect seismic force mechanically.
It is possible to Also, outside of normal use other than an earthquake
If a force is likely to be applied to the pendulum, use magnetic means to
Pendulum constraint to temporarily restrain the pendulum
However, it is possible to reliably prevent the malfunction. Well
In addition, the seismic force is detected mechanically, so earthquakes of any magnitude
If a power failure occurs, the work equipment
It is possible to reliably unlock the locking means for the machine's escape prevention.
It will be possible. As a result, a large horizontal force is applied to the work machine.
Be sure to prevent problems such as derailment and damage.
It is possible to stop.

According to the unlocking device of claim 2 of the present invention
For example, when an earthquake occurs, the seismic force acts on the pendulum and
Since it tilts or swings, it can detect seismic force mechanically.
It is possible to Also, outside of normal use other than an earthquake
If force is likely to be exerted on the pendulum, regulatory measures
Pendulum constraint to temporarily restrain the pendulum
However, it is possible to reliably prevent the malfunction. Well
In addition, the seismic force is detected mechanically, so earthquakes of any magnitude
If a power failure occurs, the work equipment
It is possible to reliably unlock the locking means for the machine's escape prevention.
It will be possible. As a result, a large horizontal force is applied to the work machine.
Be sure to prevent problems such as derailment and damage.
It is possible to stop.

Further, the solution according to claim 3 or claim 4
According to the lock device, the effect of claim 1 or claim 2 is ensured.
Can be obtained.

[0050]

[0051]

[0052]

[0053]

[Brief description of drawings]

FIG. 1 is a view showing a first embodiment of an unlocking device of the present invention, and is a side view around legs of a vibration-isolated crane equipped with the unlocking device.

FIG. 2 is a view showing the unlocking device and is an enlarged view of a portion I in FIG. 1.

FIG. 3 is a plan view of the unlocking device as seen from a direction of arrows II to II in FIG. 2.

FIG. 4 is a vertical cross-sectional view of the unlocking device as seen from the direction of arrows III to III in FIG. 3.

FIG. 5 is a plan sectional view of the unlocking device as seen from arrows IV to IV in FIG. 4.

6 is a view showing a main part of the unlocking device and is an enlarged view of a V part in FIG. 4. FIG.

FIG. 7 is a view showing a second embodiment of the unlocking device of the present invention, and is a side view showing a main part of the unlocking device.

FIG. 8 is a side view showing a modified example of the main part of the unlocking device.

FIG. 9 is a cross-sectional view of the unlocking device as seen from the arrows VI to VI in FIG. 8.

FIG. 10 is a view showing a third embodiment of the unlocking device of the present invention, and is a plan view showing a main part of the unlocking device.

FIG. 11 is a side view of the unlocking device as seen from the direction of arrows X to X in FIG. 9.

FIG. 12 is a side view of a main part showing a modified example of the unlocking device.

FIG. 13 is a side view showing an example of conventional locking means in a track-type working machine.

FIG. 14 shows a part of the unlocking means of the locking device shown in FIG.
FIG. 2 is a vertical sectional view seen from the direction of arrow I.

FIG. 15 shows a part of the unlocking means of the locking device in XI of FIG.
FIG. 2 is a vertical sectional view seen from the direction of arrow II.

[Explanation of symbols]

3,5,65 ... Locking means for locking pin, locking means for rail clamp carriage, locking means for locking pin (locking means for preventing escape) 6 ... Unlocking device 12, 15 ... Connection Seat plate, rail clamp truck side flat plate (member) 14 ... Connecting pin 18, 21, 23, 24, 25, 26, 31 ... Interlocking portion (tensile coil spring, counter lever, counter weight, bracket, vertical) Lever, base, horizontal rod) 20 ... Convex pin (locking part) 29 ... Trigger, inverted pendulum 40 ... Electromagnet (magnetic force means) 45 ... Cylindrical body with dividing groove (restriction means) 54 ...・ Locking pin 55 ・ ・ ・ Receiving

Continuation of the front page (56) References JP-A-54-102471 (JP, A) JP-A-10-19151 (JP, A) Actually developed 4-79885 (JP, U) (58) Fields investigated (Int .Cl. ⁷ , DB name) B66C 9/18 B66C 15/00

Claims (4)

(57) [Claims] 1. A seismic force is mechanically detected and triggered.
As a work machine that runs on the ground and locking means for escape prevention
When the trigger receives the seismic force of a set strength or more, it is a device for releasing the connection between
Is a pendulum that is activated by a magnetic force means that attracts the pendulum.
Motions can be either restricted or permitted.
An unlocking device characterized in that 2. A seismic force is mechanically detected and triggered.
As a work machine that runs on the ground and locking means for escape prevention
It is a device that releases the connection between When the trigger receives the seismic force greater than the set strength
Is a pendulum that The behavior of this pendulum is restricted by the regulation means supporting the pendulum.
Can be detained or permitted
An unlocking device characterized in that 3. The unlocking device according to claim 1 or 2.
In the Connecting the working machine and the escape prevention locking means
A locking portion that holds the connecting pin to be connected in a connected state, Inclination when the seismic force above the set strength is detected
With a standing pendulum, Pull out the connecting pin in conjunction with the tilting of the inverted pendulum.
And an interlocking part that unlocks the locked state with
An unlocking device characterized by and. 4. The unlocking device according to claim 1 or 2.
In the The escape prevention locking means is provided at a key point on the ground.
The locking pin that can be automatically inserted into the received
The locking part that keeps the locked state inserted in the gold and
An inverted pendulum that tilts when the above-mentioned seismic force is detected, The locking pin can be pulled out in conjunction with the tilting of the inverted pendulum.
And an interlocking part that unlocks the locked state with
An unlocking device characterized by and.