JP2002060180A - Unlocking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an unlocking device capable of easily and surely unlocking the connection between members even in a power failure, when an arbitrary scale of an earthquake occurs. SOLUTION: A lock releasing mechanism 15 is constituted of a tension coil spring 18 for automatically pulling up a connecting pin 14, a horizontal rod 21 for locking the connecting pin, a vertical lever 23 pushing and moving the horizontal rod in a lock position, a counter lever 26 having a counterweight 25 in the rear end and restricting the vertical lever in the lock position, an inverted pendulum 29 connected to the tip of the counter lever and detecting the earthquake vibration, and a limit switch 30 detecting the lock/release of the connecting pin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an unlocking means for releasing a connection state between members. For example, an unlocking device for stopping a work machine traveling on the ground in a fixed position when an earthquake occurs, etc. The present invention relates to an unlocking device suitable for use as a device.

[0002]

2. Description of the Related Art In a large-sized work machine traveling on a track, the work machine is used to prevent the work machine from running away when the work is stopped and the work is stopped or when the work is stopped at night or during a storm. In addition to the brake of its own traveling system, locking means such as a drop-down type stopper pin or a rail clamp is provided, and this is locked to prevent escape.

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

[0004] However, when an earthquake occurs while the working machine is operating or stopped, and a strong seismic force acts on the working 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 lock means, and the work machine may be lifted, causing a loss of wheel or damage. Conventionally, in order to avoid this fear, the connecting pin 63 and the stopper pins 64b, 65b of the locking means are shown in FIGS.
It is configured in the form of a sheer pin. In FIG. 14, in the case of the locking means 64, 65 of the pin drop-in type,
With the stopper pins 64b and 65b dropped into the receiver 67 of the foundation 66, the receiver 67 and the support frames 64a and 6
A groove-shaped small-diameter portion 68 is formed on the outer periphery of the pin 64b, 65b at the space between the pin 5b and the stopper pin 64b, 65b.

In FIG. 15, in the case of the rail clamp type locking means 62, in the connected state, 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. Forming part 68;
When the seismic impact force exceeds the set value, the connecting pin 63 becomes groove-shaped small-diameter portion 6
8 to be cut.

[0006]

However, when the locking force of each locking means is released by this method, if the shear pin cutting strength is set so as to be sensitive to seismic force, the connecting pin 63, Stopper pins 64b, 65
b may be easily cut. Also, it is difficult to accurately set the shear pin cutting strength. For this reason, there is a problem that the restraining force of the locking means cannot be released effectively against the seismic force. In addition to this, a configuration in which the locking means is unlocked by electrically detecting the earthquake intensity is also considered.
When an earthquake occurs, there is a possibility that a power failure will occur, so that it is not always enough to ensure that the lock is unlocked.

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 employs the following means in order to solve the above-mentioned problems. That is, the unlocking device according to claim 1 is an unlocking means for releasing the connected state between members, wherein the unlocking device mechanically detects the seismic force and releases the connected state by using this as a trigger. I do. According to the unlocking device of the first aspect of the present invention, since the occurrence of an earthquake is detected mechanically and no power is required for operation, it is possible to surely release the connection between members even in the event of a power failure. Can be.

The unlocking device according to a second aspect of the present invention is the unlocking device according to the first aspect, wherein the trigger is a pendulum that operates when the seismic force of a set strength or more is received. According to the unlocking device of the second aspect, when an earthquake occurs, the seismic force acts on the pendulum to tilt or swing the pendulum, so that the seismic force can be detected mechanically.

According to a third aspect of the present invention, in the unlocking apparatus according to the second aspect, the pendulum can be selected to be restricted or permitted by magnetic force means for attracting the pendulum. It is characterized by having. According to the unlocking device according to the third aspect, when there is a possibility that an external force during normal use other than an earthquake may be applied to the pendulum, the pendulum is temporarily restrained by selecting restraint of the pendulum by magnetic force means. However, the malfunction can be reliably prevented. Also,
When the pendulum constraint by the magnetic means is selected to be released, the pendulum can behave by receiving the seismic force at the time of the occurrence of the earthquake, so that the connection between the members can be unlocked.

According to a fourth aspect of the present invention, in the unlocking device according to the second aspect, the behavior of the pendulum can be selected to be either restricted or permitted by regulating means for supporting the pendulum. It is characterized by being. Claim 4
According to the unlocking device described, when external force during normal use other than an earthquake may be applied to the pendulum, the pendulum is restrained temporarily by selecting restraint of the pendulum by the regulating means,
The malfunction can be reliably prevented. Also, if you choose to release the pendulum constraint by the regulation means, the pendulum will be able to behave by receiving the seismic force at the time of the earthquake,
The connection between the members can be unlocked.

According to a fifth aspect of the present invention, there is provided an unlocking device for releasing the locking of a locking means for preventing escape of a work machine traveling on the ground, wherein the unlocking device according to any one of the first to fourth aspects is employed. It is characterized by having been done. According to the unlocking device of the fifth aspect, since the seismic force is detected mechanically, the locking means for preventing the work machine from escaping when an earthquake of an arbitrary scale occurs even if a power failure occurs. Can be unlocked reliably.

According to a sixth aspect of the present invention, in the unlocking device according to the fifth aspect, a locking portion for holding a connecting pin connecting the work machine and the locking means for preventing escape in a connected state. An inverted pendulum that tilts when the seismic force of a set strength or more is detected, and an interlocking unit that unlocks the locked state by pulling out the connection pin in conjunction with the tilting of the inverted pendulum. It is characterized by the following. Claim 6
According to the unlocking device described above, the operation of claim 5 can be reliably obtained.

According to a seventh aspect of the present invention, in the unlocking apparatus according to the fifth aspect, the locking means for preventing escape is automatically inserted into a money receiver provided at a key point on the ground. A locking portion that holds a possible locking pin in a locked state inserted into the receiver, an inverted pendulum that tilts when the seismic force of a set strength or more is detected, and the locking in conjunction with the tilting of the inverted pendulum. And an interlocking unit for unlocking the locked state by pulling out the pin. Claim 7
According to the unlocking device described above, the operation of claim 5 can be reliably obtained.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to an unlocking means for releasing a connected state between members. Each embodiment will be described below with reference to the drawings, but the present invention is limited to these. Of course it is not. The first of the following
In the third to third embodiments, the case where the unlocking device of the present invention is applied to a vibration-isolated crane will be described. However, 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, such a configuration is also possible.

[First Embodiment] FIG. 1 is a view showing a first embodiment of an unlocking device according to the present invention, and shows a periphery of a leg of a vibration-isolated crane provided with the unlocking device. It is a side view.
FIG. 2 is a view showing the unlocking device, and is an enlarged view of a part I in FIG. FIG. 3 is a plan view of the unlocking device as viewed from arrows II to II in FIG. FIG. 4 shows the unlocking device in FIG.
FIG. 2 is a longitudinal sectional view as viewed from the direction of arrow II. FIG. 5 is a plan cross-sectional view of the unlocking device as viewed from arrows IV to IV in FIG. FIG. 6 is a view showing a main part of the unlocking device, and is an enlarged view of a V part in FIG. In the present embodiment, a case where the unlocking means of the present invention is configured as an unlocking device that releases the locking of a rail clamp type locking means (locking means for preventing escape) of a vibration-isolating crane running on the ground. This will be described by way of example.

1 to 3, reference numeral 1 denotes a sill beam of a vibration-isolated crane, 2 denotes a traveling device mounted at each corner of the sill beam 1, 2a denotes a truck of the traveling device, 2b denotes an equalizer beam, and 3 denotes a sill beam 1. The attached pin drop-in type locking means, 4 is a traveling rail of a vibration-isolating crane, 5 is a rail clamp truck type locking means, and 6 is an unlocking device of the locking means 5. The rail clamp bogie type locking means 5 is guided by a guide member 7 extending horizontally along both sides of the rail clamp bogie from the support frame 3a of the pin drop-in type locking means 3 so as to run on the rail 4 so that it can run on the rail 4. A hole 9 (see FIG. 4) for connecting a vertical pin with the unlocking device 6 is provided on a flat plate 8 extending in the opposite direction on the rail 4 from the clamp cart.

The unlocking device 6 includes a main body frame 11 connected and supported by a support bracket 10 at the end of the truck 2a, and a connecting seat extending below the main body frame 11 so as to wrap vertically above and below the rail clamp truck-side flat plate 8. It comprises a plate 12, a connecting vertical hole 13 (see FIG. 4) provided near the end of the connecting seat plate 12, a connecting pin 14, and a lock release mechanism 15 for the connecting pin 14 (see FIG. 4). I have.

In FIG. 4, a lock release mechanism 15 is a tension coil spring for automatically pulling up a connecting pin 14 connected between an eye block 17 which is detachably fixed to the upper part of a main body frame 11 by a set pin 16 and a connecting pin 14. 18, a horizontal pin hole 19 formed in the connecting pin 14, and a horizontal pin hole 1
A connecting rod 14 provided with a convex pin 20 (locking portion) to be attached to and detached from a horizontal rod 21 for locking; a compression coil spring 22 for applying an automatic releasing force to the horizontal rod 21;
1 has a counter weight 25 at the rear end thereof, which is pivotably supported by the main body frame 11 from above with a bracket 24 and has a counter weight 25 at the rear end thereof. A counter lever 26 for restraining the vertical lever 23 to the locked position by pressing the lower end of the counter lever 26 on the support base 27 on the main body frame 11 vertically below the tip of the counter lever 26 so that the center is held and the upper end is connected to the wire 28. It comprises an inverted pendulum 29 for detecting seismic vibration loosely connected to the tip of the counter lever 26, and a limit switch 30 for detecting whether the connection pin 14 is locked or released.

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
This is unlocking means for releasing the connected state between the members (between the members), and is configured to mechanically detect the seismic force and use the trigger as a trigger to release the connected state. The trigger employs the inverted pendulum 29 that operates when it receives an earthquake force equal to or greater than a set intensity.

The base end of the vertical lever 23 is
The shaft is supported by the upper table 31, and the horizontal rod 21 is extended at the lower end extension.
The rear end face is pushed in. Also vertical lever 23
As shown in FIGS. 4 and 5, a cross pin 32 is provided on one of the upper end or the intersecting counter lever 26, and a pin receiver 33 (see FIG. 3) which is a recess is provided on the other, and the two are detachably fitted. It is composed.

FIG. 6 shows an example of the configuration of the inverted pendulum 29. The inverted pendulum 29 is preferably formed into a short cylindrical shape, and the lower end of a small-diameter cylindrical member 34 projecting from the center of the lower end is used as a ground surface, and is projected from the lower end of the cylindrical member 34 by a coil spring 35 in the cylindrical member 34. Is provided, and a wire connecting portion 37 is provided at the center of the upper end.

The inverted pendulum 29 has a sphere 36 which
At the upper center, it is supported by a concave conical support portion 38 or the like so as to hold the center, and the grounding surface of the cylindrical member 34 is brought into contact with the flat portion on the support base 27 to stand upright. The distal ends of the counter levers 26 are loosely connected by wires 28 and supported so that they can fall over in any direction. Therefore, the unlocking device 6 of the present embodiment includes the connecting pin 14 for connecting the traveling device 2 of the vibration-isolated crane (working machine) and the rail-clamping-carriage-type locking means 5 (locking means for preventing escape). Horizontal rod 21 (locking portion) for maintaining a connected state, and an inverted pendulum 29 that tilts down when an earthquake force greater than a set strength is detected.
And an interlocking part (tension coil spring 18, counter lever 26, counterweight 2) for unlocking the locked state by pulling out the connecting pin 14 in conjunction with the tilting of the inverted pendulum 29.
5, a bracket 24, a vertical lever 23, a base 31, and a horizontal rod 21) constitute a main configuration.

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

The locking means 5 of the rail clamp truck type shown in FIGS. 1 to 3 can be moved together with the anti-vibration crane by being connected to the unlocking device 6 by the connecting pin 14. The connection between the locking means 5 of the rail clamp trolley type and the unlocking device 6 is performed by operating the unlocking device 6 as follows.

In FIG. 4, when the unlocking device 6 manually turns the inverted pendulum 29 on the support 27, the weight of the inverted pendulum 29 is added to the tip of the counter lever 26 via the wire 28, and the counter lever 26 is turned counterclockwise. The counterweight 25 is lifted by rotating around and lifts 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 rightward by the urging force of the compression coil spring 22. The connecting pin 14 is automatically pulled up to the raised position by the tensile force of the extension coil spring 18. In this state, the vertical lever 23 automatically rotates to the position indicated by the dotted line, and stops at the stopper (not shown). This stopper is formed integrally with the base 31, and when the projection at the lower end of the vertical lever 23 contacts this, the tilting of the vertical lever 23 is stopped.

In this state, the locking means 5 of the rail clamp bogie type in the clamp released state is approached to the unlocking device 6 so that the connecting holes 9 and 13 of the two are aligned with each other, and the work chain block is used. Then, the supporting pin 17 is supported and the set pin 16 is removed, and the connecting pin 14 is lowered to the locking position shown in FIG. After the pendulum 29 is set in the upright posture, the vertical lever 23 is pulled back from the two-dot chain line position 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 and connected. In this state, the vertical lever 23 is automatically fitted to the counter lever 26 by the cross pin 32 and the pin receiving portion 33 to lock the connecting pin 14 in the locked position.

When the set pin 16 is mounted by pulling up the eye block 17 with a work chain block or the like, the tension coil spring 18 is extended, the unlocking device 6 is reset, and the rail clamp bogie type locking means 5 is unlocked. The connection with the device 6 is completed. This operation is similarly performed at the time of reset when the unlocking device 6 is automatically released due to earthquake vibration.
The anti-vibration crane is a rail clamp bogie type locking means 5
Then, the traveling operation is performed with all of the pin drop-in type locking means 3 and 65 (see FIG. 1) in the released state. In this case, in the unlocking device 6 shown in FIG. 4, unlocking is performed by releasing the rail clamp of the locking means 5 of the rail clamp bogie type.

In the case of an unlocking device (not shown) configured for the pin drop-in type locking means 3, the locking of the locking means 3 is performed in the same procedure as the reset operation of the unlocking device 6 of FIG. On the other hand, when unlocking manually from the locked state for operation of the anti-vibration crane, the pin of the drop-in type locking means 3 can be unlocked by the same operation.

In the case where the vibration-isolated crane is operated or stopped in a running stop state, the clamp of the rail clamp bogie type locking means 5 of the vibration-isolated crane is connected to the rail 4 at the stop position or the rest position. The pin drop-in type locking means 3 locks and connects the pin 14 to prevent the vibration-isolated crane from running away 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 in accordance with the magnitude of the seismic vibration to be set so that the inverted pendulum 29 only falls in response to the impact force peculiar to the seismic vibration. It is possible to provide it. One example is
A pendulum main body having a vertical cylindrical shape of 110 mmφ × 207 mm, and 40 mmφ × 9 mm from the lower end face of the pendulum main body
An inverted pendulum having a weight of about 15.5 kg and having such projections can be considered. When an earthquake occurs during the suspension operation or suspension of the vibration-isolated crane, the unlocking device 6 is set with the set seismic force.
The inverted pendulum 29 falls down, and the connecting pin 14 of the rail clamp bogie type locking means 5 and the unlocking device 6, which are locked by the automatic operation of the unlocking device 6, and the pin of the pin drop-in type locking means 3 Automatically released. At this time, the locking or release of the dropping pin is detected and confirmed by the automatic reset type limit switch 30, and safety is ensured.

According to the unlocking device having this configuration, when an earthquake occurs while the running of the vibration-isolated crane is stopped or stopped,
The locked state of the vibration-isolated crane is released smoothly, quickly and reliably with high precision according to the set seismic force, and the vibration-isolated crane slides on the traveling rail 4 in a wheel brake state and moves, It can absorb and reduce the impact of seismic force. For this reason, it is possible to obtain an operational effect that can effectively prevent the vibration-isolated crane from being lifted, released, or damaged by the binding 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 a main part of the unlocking device. FIG. 8 is a side view showing a modification of the relevant part of the unlocking device. FIG.
FIG. 9 is a plan sectional view of the unlocking device as viewed from arrows VI to VI in FIG. 8. This embodiment is particularly different from the first embodiment in that the inverted pendulum 29 is provided with a stopper for preventing the inverted pendulum 29 from automatically falling down due to vibration force other than the earthquake. The description will focus on the points, and the description of other identical components will be omitted.

As described above, when the anti-vibration crane of the first embodiment travels, the pin drop-in type locking means 3 and the drop-in type locking means 65 of the anti-vibration crane are unlocked, and The work is performed by releasing the clamp of the locking means 5 of the rail clamp trolley type. At this time, the unlocking of the drop-in type locking pin is performed by manually inverting the inverted pendulum 29 of the unlocking device 6 to automatically unlock the locking device, and using the rail clamp bogie type locking means 5.
However, the rail clamp is released from the rail 4 while the connecting pin 14 is locked at the locking position, and the traveling operation is performed. When the running of the vibration-isolated crane is stopped in this state and the work is continued, only the released rail clamp needs to be connected to the rail 4 again to prevent the run-away of the vibration-isolated crane.

At this time, if the inverted pendulum 29 of the unlocking device 6 falls down due to strong vibration during traveling and the like and the connecting pin 14 is automatically released while the vibration isolating crane is running, the rail clamp is moved to the rail 4. It is conceivable that the restraining force is not transmitted to the vibration-isolated crane main body even if it is clamped, and the vibration-isolated crane is 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 used together with a pendulum overturning means for preventing the inverted pendulum 29 from overturning.

The embodiment shown in FIG. 7 has a configuration in which the behavior of the inverted pendulum 29 can be selected to be 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 ground surface of the cylindrical member 34 of the inverted pendulum 29, and the inverted pendulum 29 is attracted and supported by an electromagnetic force generated by energizing the electromagnet 40. The inverted pendulum 29 is prevented from falling over, and the power to the electromagnet 40 is stopped to eliminate the electromagnetic force, and the pendulum overturning means 39 is configured to switch the inverted pendulum 29 freely.

In the embodiment shown in FIG. 8, the pendulum tipping-stopping means 39 is mechanically constructed. 7 and 8,
The pendulum tipping-stopping means 39 of this embodiment includes a lateral eye plate 42 provided at the upper end of a bracket 41 provided on the main body frame 11 of the unlocking device 6, and a base end supported by the eye plate 42 with a connecting pin 44. A gear cylinder 43 provided downward, a split grooved cylinder 45 supported by a pin connected to the drive end of the gear cylinder 43 so as to be movable in the longitudinal direction, and an inverted pendulum at the tip end of the split grooved cylinder 45. The unlocking device 6 includes a fitting portion 45a configured to be loosely attached to and detached from the upper end portion of the locking device 29, and an elevating guide 46 for the split grooved cylinder 45 provided on the main body frame 11 of the unlocking device 6. In FIG. 9, reference numeral 47 denotes a split grooved cylindrical body 45.
The tip end of the counter lever 26 of the unlocking device 6 enters the split grooved cylinder 45 through the split groove portion 47, and supports the inverted pendulum 29 via the wire 28.

In the apparatus having the configuration shown in FIG. 7, when the power supply to the electromagnet 40 is turned on in conjunction with the release operation of the rail clamp, the electromagnetic force is urged, and a tipping force acts on the inverted pendulum 29. Inverted pendulum 29 under running operation of swing type crane
Is prevented, the connecting pin 14 can be kept at the locked position. For this reason, when the vibration-isolating crane is stopped and the work is continued, when the rail clamp bogie type locking means 5 is re-coupled to the rail 4, the restraining force of the rail clamp always passes through the connecting shaft 14 and the vibration-isolating crane. To the side,
The runaway of the vibration-isolated crane can be reliably prevented.

When the power supply to the electromagnet 40 is turned off in conjunction with the reconnection of the rail clamp when the vibration-isolated crane is stopped, the inverted pendulum 29 is free to overturn by vibrating force, that is, can cope with an earthquake. Return to the state. Further, when a power failure occurs during the running operation of the anti-vibration crane, in this embodiment, the electromagnetic force of the electromagnet 40 is automatically eliminated, and the inverted pendulum 29 is similarly returned to a state in which the inverted pendulum 29 can freely fall over by vibrating force. . Therefore, even at the time of a power failure, no trouble occurs due to the provision of the electromagnet 40, 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 is provided with a split grooved cylinder 45 for supporting the inverted pendulum 29.
(Regulator) means that the behavior can be selected from either restriction or permission. That is, when the gear cylinder 43 is driven to extend a predetermined stroke in conjunction with the release operation of the rail clamp, the distal end fitting portion 45a of the split grooved cylinder 45 is loosely fitted to the upper part of the inverted pendulum 29, and the guide 46 The inverted pendulum 29 is mechanically prevented from overturning due to the lateral support force, and the connecting pin 14 can be kept at the locked position by this operation. For this reason, when stopping the running of the anti-vibration crane and continuing the work,
When the rail is reconnected, the restraining force of the rail clamp is always transmitted to the vibration-isolated crane via the connecting pin 14, so that the run-away of the vibration-isolated crane can be reliably prevented. When the vibration-isolating crane is stopped, the gear cylinder 43 is driven to contract in conjunction with the reconnection of the rail clamp, so that the inverted pendulum 2 is driven.
9 can be returned to a state where it can automatically fall over 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. FIG. 11 is a side view of the unlocking device as viewed from arrows XX in FIG. FIG.
It is a principal part side view which shows the modification of the unlocking device. This embodiment is particularly different from the first embodiment in that it is configured as an unlocking device for a pin drop-in type locking means of a vibration-isolated crane. The description of the other same components will be omitted.

In FIG. 10, reference numeral 50 denotes a support frame for the pin drop-in type locking means 3 (FIG. 1) according to this embodiment, 6 'denotes an unlocking device of this embodiment, and 53 denotes an unlocking device 6'.
Side connection plate. In FIG. 11, the support frame 50
In the lower part, two upper and lower pin insertion plates 5 extending horizontally to the left and right
1, and a pin insertion hole 52 in the vertical direction is provided in the pin insertion plate 51. The unlocking device 6 ′ is fixed to the side surface of the support frame 50 with a bolt and a nut at the connection plate 53, and is provided so as to be arranged in parallel with the rail 4. The unlocking device 6 'is assembled so as to automatically unlock the locking pin 54 of the locking means 3 in place of the connecting pin 14 of FIG. 4, and the upper and lower two seat plates 12 of the unlocking device 6' are supported by a support frame. The pin insertion holes 51 on the support frame 50 are arranged by vertically lapping the two pin insertion plates 51 on the side of the support frame 50 so as to overlap with the two pin insertion plates 51 on the support frame 50 side.
Aligned with the same axis. 55 is a receiving money 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 ′ of the present embodiment can be automatically inserted into the catch 55 provided at a key point on the ground of the pin drop-in locking means 3 (locking means for preventing escape). The horizontal rod 21 (locking portion) for holding the locking pin 54 in a locked state inserted into the receiver 55.
And an inverted pendulum 29 that tilts when an earthquake force equal to or greater than the set strength is detected, and an interlocking unit (the tension coil spring 18, which releases the locking state by pulling out the locking pin 54 in conjunction with the tilting of the inverted pendulum 29). Counter lever 26, counter weight 25, bracket 24, vertical lever 23, table 3
1, a horizontal rod 21) are 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 first embodiment, and the automatic unlocking operation by the inverted pendulum 29 in the locked state is also performed.
This is the same as in the first embodiment. When an earthquake occurs in the locked state, the inverted pendulum 29 is set by the set seismic vibration force.
The locking pin 54 is automatically unlocked, and the vibration-isolating crane can slide and move on the rail 4 in the brake-on state, and the seismic impact force applied to the vibration-isolating crane is absorbed and mitigated. Damage, derailing, falling, etc. can be prevented. The locking pin 54 of the drop-down type locking means 3 is taken into the unlocking device 6 ′, and is directly locked, restrained, and released. It is simpler than a lock device.

FIG. 12 shows a modification of the main part of the unlocking device 6. In the figure, reference numeral 21 'denotes a trigger rod for supporting the locking pin 54 in a locked state, reference numeral 22 denotes a tension spring for urging the trigger rod 21' in a direction to separate from the locking pin 54, and reference numeral 25 'denotes the trigger rod 21. 21a 'is a universal joint for supporting the support rod 21A' so that it can freely move in both the vertical direction and the horizontal direction.
A compression spring 1B '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' comes off the rear end face of the trigger rod 21 ', so that the released trigger rod 21' is pulled by the tension spring. 2
2 to unlock the locking pin 54. It is needless to say that this modification can be applied to the first and second embodiments.

As described above, in the first to third embodiments, the case where the unlocking device of the present invention is applied to a vibration-isolating crane has been described. However, the present invention is not limited to this. A configuration applied to other working machines such as a continuous unloader is also possible.

[0047]

The unlocking device according to the first aspect of the present invention employs a structure in which a seismic force is mechanically detected and the state of connection between the members is released by using this as a trigger. According to this configuration,
Since the seismic force is mechanically detected, it is possible to easily and surely release the connection between the members even when a power failure occurs even if an earthquake of an arbitrary scale occurs.

The unlocking device according to the second aspect of the present invention employs a configuration in which the trigger is a pendulum that is activated when it receives a seismic force exceeding a set intensity. According to this configuration, when an earthquake occurs, the seismic force acts on the pendulum to tilt or swing the pendulum, so that the seismic force can be detected mechanically.

Further, the unlocking device according to claim 3 employs a configuration in which the behavior of the pendulum can be selected to be either restricted or permitted by magnetic force means for attracting the pendulum. According to this configuration, when external force during normal use other than an earthquake is likely to be applied to the pendulum, the pendulum is restrained temporarily by selecting restraint of the pendulum by magnetic force means, and its malfunction is reliably ensured. Can be prevented.

Further, the unlocking device according to claim 4 employs a configuration in which the behavior of the pendulum can be selected to be either restricted or permitted by regulating means for supporting the pendulum. According to this configuration, if there is a possibility that an external force during normal use other than an earthquake may be applied to the pendulum, the pendulum is temporarily restrained by selecting restraint of the pendulum by the restricting means, and the malfunction thereof is reliably performed. Can be prevented.

According to a fifth aspect of the present invention, there is provided an unlocking device for releasing the locking of a locking means for preventing escape of a work machine traveling on the ground. Was adopted. According to this configuration, since the seismic force is mechanically detected, even in the event of an earthquake of any scale, even if a power failure occurs, the locking of the escape prevention locking means of the work machine is reliably unlocked. It is possible to do. Thus, it is possible to reliably prevent a problem such as a large horizontal force acting on the work machine to cause the wheel to be detached or damaged.

According to a sixth aspect of the present invention, there is provided the unlocking device according to the sixth aspect of the present invention, wherein a locking portion for holding a connecting pin connecting the work machine and the escape preventing locking means in a connected state; An inverted pendulum that tilts when an earthquake force is detected and an interlocking unit that unlocks the locked state by pulling out the connecting pin in conjunction with the tilting of the inverted pendulum are employed. According to this configuration, the effect of claim 5 can be reliably obtained.

Further, in the unlocking device according to the present invention, the locking means for automatically locking the escape-preventing locking means into a metal receiver provided at a key point on the ground is provided. A locking portion inserted into the gold and held in a locked state; an inverted pendulum that tilts when the seismic force greater than or equal to a set strength is detected; and the locking pin is pulled out in conjunction with the tilting of the inverted pendulum to pull out the locking state. An interlocking unit that solves the problem is adopted. According to this configuration, the effect of claim 6 can be reliably obtained.

[Brief description of the drawings]

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

FIG. 2 is a diagram 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 viewed from arrows II to II in FIG. 2;

FIG. 4 is a longitudinal sectional view of the unlocking device as viewed from arrows III to III in FIG. 3;

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

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

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 modification of the main part of the unlocking device.

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

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 viewed from arrows XX in FIG. 9;

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

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

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

FIG. 15 shows a part of the unlocking means of the locking device shown in FIG.
FIG. 2 is a longitudinal sectional view as viewed from the direction of arrow II.

[Explanation of symbols]

3, 5, 65: pin drop-in type locking means, rail clamp cart type locking means, pin drop-in type locking means (locking means for preventing escape) 6: unlocking device 12, 15, ... connection Seat plate, rail clamp carriage side flat plate (member) 14 ... connecting pin 18, 21, 23, 24, 25, 26, 31 ... interlocking part (tensile coil spring, counter lever, counter weight, bracket, vertical Lever, stand, horizontal rod) 20 ... convex pin (locking part) 29 ... trigger, inverted pendulum 40 ... electromagnet (magnetic force means) 45 ... split grooved cylinder (restriction means) 54 ...・ Locking pin 55 ・ ・ ・ Payment

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiroshi Ikeda Inventor Hiroshi Hiroshima City, Hiroshima City 4-4-2, Kannon Shinmachi Hiroshima Works Mitsubishi Heavy Industries, Ltd. Hiroshima Works F-term (reference) 3F203 AA06 CA03 EC12 EC17 3F204 AA01 BA02 CA07 GA04

Claims (7)

[Claims] 1. An unlocking device for releasing a connected state between members, wherein the unlocking device is configured to detect the seismic force mechanically and release the connected state by using the mechanical force as a trigger. 2. The unlocking device according to claim 1, wherein the trigger is a pendulum that operates when the seismic force of a set strength or more is received. 3. The unlocking device according to claim 2, wherein the behavior of the pendulum can be selected to be either constrained or permitted by magnetic force means for attracting the pendulum. Locking device. 4. The unlocking device according to claim 2, wherein the behavior of the pendulum can be selected to be either restricted or permitted by a restricting means for supporting the pendulum. apparatus. 5. An unlocking device for unlocking locking means for preventing escape of a work machine running on the ground, wherein the unlocking device according to claim 1 is employed. Unlocking device. 6. The unlocking device according to claim 5, wherein a locking portion for holding a connecting pin connecting the work machine and the escape preventing locking means in a connected state, and the earthquake having a set strength or more. An unlocking device comprising: an inverted pendulum that tilts when a force is detected; and an interlocking unit that unlocks the locked state by pulling out the connection pin in conjunction with the tilting of the inverted pendulum. . 7. The unlocking device according to claim 5, wherein a lock pin of the escape prevention locking means, which can be automatically inserted into a metal receiver provided at the key point on the ground, is provided. A locking portion inserted into the gold and held in a locked state; an inverted pendulum that tilts when the seismic force greater than or equal to a set strength is detected; and the locking state is pulled out by pulling out the locking pin in conjunction with the tilting of the inverted pendulum. And an interlocking unit for unlocking the lock.