JPH05310195A - Unlocking device - Google Patents

Abstract

PURPOSE:To provide an unlocking device of high reliability which will not unlock a lock in a locked state. CONSTITUTION:A closed magnetic circuit of the permanent magnet 31 of a first magnetic substance portion 30 provided to a lockarm 26 is formed between the permanent magnet 31 and the second magnetic substance portion 37 of a locklatch 34, and lines of magnetic force of the permanent magnet 31 effectively combine to the second magnetic substance portion 37 and firmly attract the lockarm 26 and the locklatch 34, thereby holding them in a locked state. To unlock the lock, lines of magnetic force that cancel out the lines of magnetic force generated by the attracting part of the permanent magnet 31 are generated by an electromagnet 43 to reduce the attractive force and attraction preventive plates 44, 45 are provided between the first magnetic substance portion 30 and the electromagnet 43 so that disconnection of the lockarm 26 is facilitated. A device of high reliability which surely operates is thus provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a launch lock mechanism having a function of protecting a flexible structure or a movable part of a drive mechanism from vibration during normal transportation and shock / vibration at the time of launching a satellite by a rocket. Etc. relating to a lock releasing device.

[0002]

2. Description of the Related Art Conventionally, for example, as a lock release device for a launch lock mechanism of an antenna drive mechanism device mounted on an artificial satellite, a cutter is driven by the explosive force of explosive powder to cut a wire rope extending from the launch lock mechanism. Therefore, it is known that the lock is released.

However, while the explosive power of explosives is highly reliable, it has a high impact power and requires protection of peripheral equipment in order to avoid chemical contamination, resulting in an increase in weight. .. Furthermore, it has the disadvantage that it cannot be tested in advance, since it can only be used once.

On the other hand, an electromagnetic type unlocking device has been filed as Japanese Patent Application No. 63-040690. Hereinafter, this unlocking device will be described with reference to FIG.

FIG. 7 is a side view. A lock arm 2 is rotatably supported on a base 1 by a bearing 3 at an intermediate portion on one end side. A wire rope 4 extending from a launch lock mechanism (not shown) is attached to one end of the lock arm 2, and the wire rope 4 pulls the lock arm 2 to rotate in the direction of arrow 5. .. Further, a magnetic body portion 6 is provided on the other end side of the lock arm 2,
A concave portion 7 is formed on the upper surface of the magnetic body portion 6.

On the other hand, the base 1 on the other end side of the lock arm 2
An inverted L-shaped lock latch 8 is rotatably supported by a bearing 9 and is urged by a coil spring 10 to rotate in the direction of arrow 11.
In the locked state, the claw 12 at the tip of the lock latch 8
By engaging with the recess 7 of the lock arm 2,
The lock arm 2 is locked.

Further, the power source 1 is arranged so as to face the base 1 with a gap provided on the lower surface of the magnetic body portion 6 of the lock arm 2.
An electromagnet 14 excited by 3 is attached.

When the lock is released, the power source 13 is turned on and the electromagnet 14 is excited to attract the magnetic body portion 6 to the electromagnet 14, and the lock arm 2 resists the pulling force of the wire rope 4 and is opposite to the arrow 5 direction. Rotate in the direction of. As a result, the claw 12 engaged with the recess 7 is released,
The lock latch 8 is moved to the arrow 1 by the coil spring 10.
Rotate in one direction.

Subsequently, the magnetic material part 6 is separated from the electromagnet 14 by turning off the power source 13 to turn off the excitation of the electromagnet 14, and the pulling force of the wire rope 4 causes the lock arm 2 to move.
Rotates in the direction of arrow 5 to unlock.

In the device constructed as described above, a strong impact force is not exerted at the time of unlocking, and since there is no chemical contamination or the like, the weight does not increase, and the test can be conducted in advance. However, the magnetic body portion 6 of the lock arm 2
Since there is a gap between the electromagnet 14 and the electromagnet 14, the lock arm 2 may be rotated toward the electromagnet 14 by the impact force at the time of launching, the pawl 12 of the lock latch 8 may be disengaged, and the lock may be accidentally released. There is a risk of being lost.

[0011]

As described above, in the conventional device in which the gap is formed between the lock arm and the electromagnet, the lock latch is disengaged due to the impact force from the outside and the lock is accidentally locked. It may be canceled. The present invention has been made in view of such a situation, and an object thereof is a highly reliable lock in which the lock latch is not easily disengaged even if an impact force or the like is applied and the lock is not accidentally released. To provide a release device.

[0012]

SUMMARY OF THE INVENTION A lock releasing device of the present invention comprises a lock arm having an intermediate portion pivotally supported and one end connected to a lock mechanism, and an intermediate portion provided at the other end of the lock arm. A first magnetic body part having a permanent magnet in its part and magnetic members on both sides, a lock latch whose base end is rotatably supported, and a first latch provided at the tip of this lock latch. The magnetic member has a magnetic pole corresponding to the magnetic member of the magnetic member, and the magnetic member and the magnetic member attract each other to maintain the locked state of the lock mechanism and to close the magnetic field between the first magnetic member and the permanent magnet. A second magnetic material portion forming a circuit; and a first magnetic material portion
An electromagnet that opposes the magnetic member of the magnetic body part through the high magnetic resistance part and is excited so as to cancel the magnetic force line of the permanent magnet that passes through the magnetic pole and separates the lock latch from the other end of the lock arm; Urging means for separating the lock arm from the rotation locus of the lock arm.

[0013]

In the lock releasing device configured as described above, the magnetic circuit in which the permanent magnet of the first magnetic body portion provided on the lock arm is closed is provided between the lock arm and the second magnetic body portion of the lock latch. The lock mechanism holds the locked state of the lock mechanism by attracting the lock arm and the lock latch, and when releasing the locked state, the magnetic field lines that cancel the magnetic field lines of the attracting section of the lock arm and the lock latch by the permanent magnet are generated by the electromagnet. With this configuration, in the locked state, the magnetic lines of force of the permanent magnets of the first magnetic body portion are effectively coupled to the second magnetic body portion forming the closed magnetic circuit, and the lock arm and the lock latch are firmly formed. Adsorb. Further, in unlocking, by generating a magnetic force line that cancels the magnetic force line of the attracted portion by exciting the electromagnet, the attracting force by the permanent magnet can be reduced, and further, the permanent magnet of the first magnetic body part Since a high magnetic resistance portion is provided between the magnet and the electromagnet to attract the magnet, the attracting force is weak and the magnet is easily detached. For this reason, in the locked state, even if an impact force is applied, the lock latch is unlikely to come off, and a state in which there is no risk of accidentally releasing the lock is achieved, and the lock can be released reliably and easily. A high unlocking device is obtained.

[0014]

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

First, a first embodiment will be described with reference to FIGS. FIG. 1 is a side view showing an outline of an electromagnetic type unlocking device, FIG. 2 is a side view of a main part in a locked state, and FIGS. 3 to 5 are side views of a main part in the process of unlocking. is there.

In FIG. 1, bearing bases 24 and 25 are attached to sub-bases 22 and 23 provided at both ends of the base 21, respectively. A square bar-shaped lock arm 26 is rotatably supported by a bearing stand 24 provided on one of the sub-bases 22 in parallel with the surface of the base 21 via a bearing 27 at an intermediate portion on one end side. And the lock arm 26
An end of a wire rope 28 extending from a launch lock mechanism (not shown) is attached to one end of the lock rope 26.

The other end of the lock arm 26 has a first
Of the first magnetic body portion 30 is provided.
Has a permanent magnet 31 magnetized in the longitudinal direction so that the other end of the lock arm 26 has an N pole in the middle portion, and magnetic members 32 and 33 are arranged on both sides of the permanent magnet 31. Has been done.

On the other hand, on the bearing stand 25 provided on the other sub-base 23, a lock latch 34 is rotatably provided so that its base end portion has a bearing 35 and has the same rotation surface as the lock arm 26. It is supported. Lock latch 3
4 has an inverted L-shaped portion 36 on the base end side and a U-shaped second magnetic body portion 37 on the tip end side. The lock latch 34 is biased by a contracted coil spring 38 so as to rotate in the direction of arrow 39.

Then, the magnetic poles 40 of the second magnetic body portion 37,
The end face of 41 is the first magnetic body portion 30 of the lock arm 26.
It is provided so as to abut on the upper surfaces of the magnetic members 32 and 33 arranged on both sides. In the locked state, the magnetic poles 40 and 41
The end surface of the magnetic member 32 is attracted to the upper surfaces of the magnetic members 32 and 33, and the first magnetic body portion 30 and the second magnetic body portion 37 form a magnetic circuit in which the permanent magnet 31 is closed.

An electromagnet 43 having a U-shaped magnetic core 42 is attached to the other side of the sub-base 23 in proximity to the lower side of the first magnetic body portion 30 of the lock arm 26. The end surface of the magnetic core 42 has an adsorption prevention plate 44 made of a non-magnetic material such as aluminum or plastic.
It is opposed to the lower surfaces of the magnetic members 32 and 33 of the first magnetic body portion 30 with 45 interposed therebetween. A power supply 47 is connected to the exciting coil 46 of the electromagnet 43 via a lead wire 49 having a switch 48.

Next, the operation of the lock releasing device configured as described above will be described.

In the locked state, as shown in FIG. 2, the end faces of the magnetic poles 40 and 41 of the second magnetic body portion 37 are attracted to the upper surfaces of the magnetic members 32 and 33 of the first magnetic body portion 30. 1
The magnetic body portion 30 and the second magnetic body portion 37 form a closed magnetic circuit of the permanent magnet 31, and the magnetic force line 50 of the permanent magnet 31 passes through this magnetic circuit in the direction of the arrow indicated by the broken line. The attraction preventing plates 44, 45 are provided between the magnetic members 32, 33 of the first magnetic body portion 30 and the end faces of the magnetic core 42 of the electromagnet 43.
The magnetic field lines 50 of the permanent magnet 31 are less likely to pass through the magnetic core 42 side because of the intervening magnetic field.

For this reason, the lock arm 26 and the lock latch 34 are provided with a pulling force of the wire rope 28 for rotating in the direction of the arrow 29 and a biasing force of the coil spring 38 for rotating in the direction of the arrow 39. On the contrary, it is firmly attracted and fixed by the magnetic force of the permanent magnet 31.

When the lock state is released, first, the switch 48 is turned on to excite the exciting coil 46 of the electromagnet 43 by the power source 47. As a result, the magnetic core 42 of the electromagnet 43 is magnetized as shown in FIG.
2 through the adsorption prevention plate 44 and the magnetic member 32, and further from the magnetic pole 40 to the second magnetic body 37, the magnetic pole 41, and the magnetic member 3.
3. The magnetic circuit that passes through the adsorption prevention plate 45 and returns to the magnetic core 42 passes through the magnetic force line 51 of the electromagnet 43 in the direction of the arrow indicated by the alternate long and short dash line.

At this time, in the second magnetic body 37, the direction of the magnetic force line 51 formed by the electromagnet 43 and the magnetic force line 5 of the permanent magnet 31.
The direction of 0 becomes the opposite direction to cancel each other, and the magnetic member 32
The attraction force due to the magnetic force at the contact surface between the magnetic pole 40 and the magnetic member 33 and the magnetic pole 41 is reduced. Since this attracting force is set to be smaller than the force that biases the lock latch 34 by the coil spring 38, the lock latch 34 rotates in the direction of arrow 39 and moves away from the rotation track of the lock arm 26.

When the lock latch 34 is rotated and the second magnetic body portion 37 is separated from the first magnetic body portion 30, as shown in FIG.
As shown by, the magnetic force line 50 of the permanent magnet 31 changes so as to pass through the magnetic member 33, the attraction preventing plate 45, the magnetic core 42, the attraction preventing plate 44, and the magnetic member 32 as indicated by the broken line. Further, the magnetic force lines 51 of the electromagnet 43 are also from the magnetic core 42 to the adsorption prevention plate 44, the magnetic member 32, and the permanent magnet 3 as shown by the one-dot chain line.
1, passing through the magnetic member 33, the adsorption prevention plate 45 and returning to the magnetic core 42, and passes in the same direction as the magnetic force line 50 of the permanent magnet 31.

At this time, the attraction prevention plate 4 acting between the first magnetic body portion 30 of the lock arm 26 and the electromagnet 43.
The attraction force with 4 and 45 interposed is the lock arm 2
6 is in a state of being larger than the tensile force for rotating the wire 6 by the wire rope 28 in the direction of the arrow 29.

Subsequently, by turning off the switch 48, the excitation coil 46 of the electromagnet 43 by the power supply 47 is no longer excited. As a result, as shown in FIG. 5, only the magnetic force lines 50 of the permanent magnet 31 are magnetic members 33, the attraction preventing plate 45, the magnetic core 42, the attraction preventing plate 44, and the magnetic member 32 as indicated by the broken lines.
Will pass through. The attraction by the permanent magnet 31 is weak because the attraction prevention plates 44 and 45 having high magnetic resistance are interposed between them, so that the force is weak, and the lock arm 26 is rotated in the direction of the arrow 29 by the pulling force of the wire rope 28. Then
The wire rope 28 is relaxed and the launch lock mechanism is unlocked.

With such a configuration, in the locked state, the magnetic circuit in which the permanent magnet 31 is closed has the first
Of the permanent magnet 31 to the magnetic body portion 30 and the second magnetic body portion 37 of
The lock arm 26 is formed by effectively utilizing the magnetic force of the
And the lock latch 34 are firmly attracted and fixed.

In the locked state, the lock arm 26
Has its upper surface adsorbed to the lock latch 34 to restrict its movement, and its lower surface has adsorption prevention plates 44 and 45 between it and the magnetic core 42 of the electromagnet 43, so that there is no gap and movement is restricted. It is in a state of being Therefore, even if an external impact force is applied, it is difficult for the lock latch to come off,
There is no risk that the lock will be accidentally released.

When the locked state is released, the electric current flowing through the exciting coil 46 of the electromagnet 43 can be turned on and off to enable simple and reliable operation.
Further, since it is an electromagnetic type, a strong impact force is not exerted at the time of unlocking, and there is no chemical pollution, so that the weight of the device does not increase, and it is possible to perform a test in advance.

Next, a second embodiment will be described with reference to FIG. FIG. 6 is a side view showing the outline of the device in the unlocked state.

In FIG. 6, one end of the base 21 and the bearing base 25 are provided with stoppers 52 and 53 for limiting the turning range of the lock arm 26 and the lock latch 34, respectively, on the turning locus. Permanent magnets 56 and 57 are attached to the tips of the bearings 54 and 55 of the stoppers 52 and 53.

The lock arm 26 and the lock latch 34 are provided with permanent magnets 56, 57 of the stoppers 52, 53.
The magnetic members 58 and 59 are attached to the portions that come into contact with each other. Thus, in the unlocked state, the stoppers 52, 5
The magnetic members 58 and 59 are attracted to the permanent magnets 56 and 57 of No. 3 to prevent the lock arm 26 and the lock latch 34 from wobbling. It is more preferable that the permanent magnets 56, 57 are made of a plastic magnet having a cushioning property.

Further, counterweights 60 and 61 are attached to the ends of the lock arm 26 and the lock latch 34, and the counterweights 60 and 61 attach the counterweights to the bearings 27 and 35. It is provided so that the weights of both ends of 34 are balanced.

With this structure, the same operation and effect as those of the first embodiment can be obtained, and the lock arm 26 and the lock latch 34 can be prevented from wobbling in the unlocked state, and a stable device can be obtained. realizable. Further, the lock arm 26 and the lock latch 34 are provided in the bearing 2
Since the weights around 7, 35 are balanced by the counterweights 60, 61, it becomes more difficult to rotate against an impact force with a large translational component applied from the outside in the locked state, and the lock is accidentally released. It is less likely to be lost.

The present invention is not limited to the above-mentioned respective embodiments, and for example, two sheets are provided between the end face of the magnetic core 42 and the magnetic members 32 and 33 of the first magnetic body portion 30. Although the attraction prevention plates 44 and 45 made of a non-magnetic material are interposed, the cross-sectional area is limited so that the rotation of the lock arm 26 in the direction of the magnetic core 42 is restricted and the magnetic resistance of the magnetic path between them can be made large. The rotation restriction member may be provided in another portion so that the projection has a smaller magnetic resistance and a larger magnetic resistance, or a gap is formed between the projections.

Further, although the coil spring 38 is contracted so as to urge the rotation of the lock latch 34 in the direction of the arrow 39, a rotation coil spring is provided to rotate the bearing 38 about its rotation center. You may make it urge | bias by the force or the attraction force by providing a permanent magnet. Further, in FIG. 5, the electric current of the electromagnet 43 may be applied so as to be in a direction opposite to the magnetic force line of the permanent magnet 31 when unlocking. Further, although the rotating surfaces of the lock arm 26 and the lock latch 34 are parallel to each other, they may be provided so as to intersect with each other and may be modified appropriately within a range not departing from the gist.

[0039]

As is apparent from the above description, the present invention forms a magnetic circuit in which the permanent magnet is closed in the locked state, and the permanent magnet attracts the lock arm and the lock latch to release the locked state. In this case, the electromagnets generate magnetic lines of force that cancel the magnetic lines of force of the permanent magnets of the lock arm and lock latch attracting parts, so even if an impact force is applied, the lock latch does not easily come off and the lock is accidentally released. It is possible to obtain a reliable unlocking device that realizes a reliable locked state without fear of being unlocked and that can reliably and easily unlock.

[Brief description of drawings]

FIG. 1 is a side view showing an outline of a first embodiment of the present invention.

FIG. 2 is a side view of an essential part showing a locked state in the above.

FIG. 3 is a side view of an essential part when the electromagnet is excited in the unlocking process in the above.

FIG. 4 is a side view of a main part when the lock latch is rotated in the lock releasing process in the above.

FIG. 5 is a side view of a main part when the excitation of the electromagnet is turned off after the rotation of the lock latch in the unlocking process in the above.

FIG. 6 is a side view showing the outline of the second embodiment of the present invention.

FIG. 7 is a side view showing an outline of a conventional example.

[Explanation of symbols]

 26 ... Lock arm 28 ... Wire rope 30 ... 1st magnetic body part 31 ... Permanent magnet 32, 33 ... Magnetic member 34 ... Lock latch 37 ... Second magnetic member 38 ... Coil spring 40, 41 ... Tooth 43 ... Electromagnet 44 , 45 ... Suction prevention plate

Claims (1)

[Claims] 1. A lock arm in which an intermediate portion is pivotally supported and one end portion of which is connected to a lock mechanism, and a permanent magnet is provided in the other end portion of the lock arm and an intermediate portion has magnetic members on both sides. A first magnetic body portion, a lock latch whose base end portion is rotatably supported, and a magnetic pole corresponding to the magnetic member of the first magnetic body portion provided at the tip end portion of the lock latch. The magnetic pole and the magnetic member are attracted to each other to hold the locked state of the lock mechanism, and
A second magnetic body portion that forms a magnetic circuit in which the permanent magnet is closed with the magnetic body portion, and a magnetic member of the first magnetic body portion that faces the second magnetic body portion via a high magnetic resistance portion and the magnetic pole. An electromagnet that excites the magnetic field lines of the permanent magnet passing therethrough to separate the lock latch from the other end of the lock arm, and a biasing unit that separates the lock latch from the rotation locus of the lock arm. An unlocking device comprising: