JPS5929095Y2 - Automatic release device for locking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the mounting structure of an electromagnetic magnet of a locking device equipped with an electromagnetically operated unlocking device.

Conventionally, there has been a shutter opening/closing control that has a locking means for locking a shutter installed at the discharge port of a combine harvester, and is equipped with an electromagnetic magnet that is driven by a signal from a grain sensor and automatically unlocks the locking means. The device is known.

By the way, in conventional lock release devices of this type, the electromagnetic magnet for unlocking is attached to the base as one complete unit that cannot be separated, and usually the lock mechanism is assembled on the base in advance. Then, the electromagnetic magnet as a single item was fixed to the base.

When fixing this electromagnetic magnet, in order to absorb dimensional variations in connection with the locking means and obtain effective plunger driving force, the electromagnetic magnet mounting hole in the base is made into an elongated hole and the electromagnetic magnet is slid while Although the assembly and adjustment were done in the proper position, it was complicated, and the electromagnetic magnet was installed at an angle with respect to the stroke direction of the plunger, increasing the sliding resistance of the plunger, and the locking mechanism between the plunger and the fixed core There was a problem in that it was impossible to set the minimum gap that matched the required stroke.

In addition, failures such as burnout, wire breakage, and poor insulation are particularly likely to occur, especially in the excitation coil, but in this case, with the conventional assembly structure, it would be costly to disassemble and repair the permanent fixing means, so at least the electromagnetic magnet However, there were service problems such as the need to replace the shirt opening/closing control device itself in some cases.

The present invention was developed in view of this problem, and by making the electromagnetic magnet, which is the unlocking device of the locking device, separable, it can be assembled at the same time as the locking device, and the plunger can be set properly. With,
An object of the present invention is to provide an automatic release device for a lock device that allows easy replacement of excitation coils that often fail.

For this reason, in the automatic release device for a lock device according to the present invention, a core for accommodating an electromagnetic magnet is integrally provided in the base on which the locking means is assembled, and a bobbin is used, in which an excitation coil is pre-wound around the outer periphery of a hollow cylinder. One end is fitted to the fixed core fixed to the center of the core, while the bobbin end opposite to the fixed core is supported by a holding member having a mounting plate, The holding member is connected to the core and fixed to the base side, a magnetic circuit with the core is closed, and a plunger for unlocking the locking means is slidably inserted into the bobbin. There is.

Hereinafter, the present invention will be described in more detail with reference to the illustrated embodiments.

In FIG. 1, reference numeral 1 denotes a fork member that locks by fitting between a lock groove 1b formed in a fork portion 1a with a pin-shaped protrusion 2 for locking a striker or the like protruding from a mating member to be locked; 3 has a claw portion 3a that locks a locking recess 1C provided on the outer periphery of the fork member 1 on the side opposite to the fork portion 1a, and holds the fork member 1 in the lock position; 4 is a claw lever that will be described in detail later. As will be explained, the electromagnetic magnet 4 is excited by the electromagnetic magnet for unlocking assembled in the core 6 provided integrally with the base 5, and the plunger plunger is fitted deeply into the center shaft hole 4a of the electromagnetic magnet 4. , a central shaft hole 4 facing the plunger tip 7a.
By adsorbing to the fixed iron core 8 fixed to the end of a,
Alternatively, by swinging the manual lever 3C of the claw lever 3 projected rearward from the base 5, the shirt is passed between the pair of extensions 9, 9 formed at the rear end 7b of the plunger). The rising portion 3b protruding into the groove 11 formed between the pair of extension portions 9 is moved in the lock release direction, and the claw lever 3 is rotated around the claw shaft 12 to release the fork member by the claw portion 3a. 1
The lock is released by releasing the lock.

The fork member 1 is rotatably supported around a support shaft 13 erected on a base 5 provided with mounting brackets 5a, 5a, and when the locking by the claw lever 3 is released, A coil spring 14 tensioned between the claw lever 3 and the vicinity of the rising part 3b allows the claw lever 3 to rotate counterclockwise in the figure, and when the protrusion 2 is operated in the direction shown by the arrow a, it follows this movement. to release protrusion 2.

In addition, the extension part 1 of the plunger rear end 7b (shirt) 10
At 0a, a coil spring 15 is stretched between the support shaft 13 of the fork member 1 and always biases the plunger 7 in the direction of pulling it back, and when the electromagnetic magnet 4 is de-energized, The plunger 7 is returned to the retracted position shown by the solid line in FIG. 1 in preparation for the next lock.

Then, when the protrusion 2 is fitted into the lock groove 1b of the fork member 1 and operated in the locking direction again as indicated by the arrow, the fork member 1 is now rotated clockwise.
The claw lever 3 is rotated around the claw shaft 12 against the coil spring 14 suspended between it and the fork member 1, and when the fork member 1 is rotated to the lock position, the claw lever 3 is locked. After that, the fork member 1 is locked by locking the recess 1C with the claw 3a.

In FIG. 1, reference numeral 16 indicates a movable contact protruding above the fork member 1, and reference numeral 17 indicates a claw shaft 12 of the claw lever 3.
A fixed contact made of a leaf spring whose base is fixed to the fork member 1 and whose contact end is extended onto the fork member 1. When the lock is released and the fork member 1 is rotated counterclockwise, the movable contact 16 The switch is configured to detect unlocking by bringing the lock into contact with the fixed contact 17.

In the present invention, the core 6 to which the electromagnetic magnet 4 is attached is
It is characterized by being formed integrally with the base 5.

That is, in the present invention, as shown in the unfolded state in FIG. 3, when punching and forming the base 5,
At the same time, a core 6 extending continuously from one end edge 5b in the longitudinal direction and extending in a direction perpendicular to the longitudinal direction of the base 5 is punched out, and from the continuous part with the base 5, firstly raised perpendicularly to the base 5, Then, leaving the center portion 6a, the wing portions 6b, 6b are each bent inwardly perpendicular to the center portion 6a to form a core 6 having a U-shaped horizontal cross section.

In the present invention, the core 6 is integrally formed with the base 5 as described above, and the excitation coil 1 constituting the electromagnetic magnet 4 is
8, bobbin 19, tube 20, fixed iron core 8, holding member 21. Assemble the plunger 7, etc. one by one.

First, the excitation coil 18 is wound in advance around the outer periphery of a bobbin 19 made of a hollow cylindrical insulator having flanges at both ends in the axial direction.

Next, one end of the tube 20 made of non-magnetic material is attached to the holding member 21. A cylindrical fixed core 8 made of a ferromagnetic material and having a concave portion 8a on the back surface into which a truncated cone provided at the tip 7a of the plunger 7 can be fitted is fixed to the fixed core 8 and the plunger tip 7a. The central part 6a of the core 6 is fixed by a screw or the like through an adjustment washer 22 made of a magnetic material that adjusts the spacing.
Attach to.

After inserting the shaft hole 19a of the bobbin 19 into the outer cylinder of the tube 20 from the free end, with the fixed iron core 8 fitted into the free end of the tube 20, insert the core 6 forward from the rearward open part. The bobbin 19 is inserted into the core 6, and as shown in FIG. 4 when viewed from the outside, the front surface of the bobbin 19 is attached to the annular abutting portion 6C provided inwardly protruding from the center portion 6a of the core 6. Bring it into contact.

The back side of the bobbin 19 is pressed forward by a holding member 21 made of a rectangular magnetic material fitted into the core 6, so that the bobbin 19 is held between the contact portion 6C of the core 6 and the holding member 21. The holding member 21 is attached to the base 5 by a mounting bracket 21 a that protrudes rearward from the lower end thereof so as to be fixed.

Further, the plunger 7, which has a narrow air groove 7C penetrating the front and back at the top of the circle and moves smoothly back and forth within the tube 20, is inserted into the tube 20, and a plunger 7 is inserted into the groove 11 formed at the rear end 7b of the plunger. The claw lever 3 is assembled so that the portion 3b protrudes, and at the same time, the fork member 1 and the like are also assembled.

After the assembly is completed, the stroke of the plunger 7 required for rotation of the claw lever 3 to release the lock matches the distance between the solid iron core 8 and the plunger tip 7a, in other words, the lock is released. To eliminate the gap between the center part 6a of the core 6 and the fixed core 8 created by dropping the fixed core 8 until the back surface of the fixed core 8 comes into contact with the plunger tip 7a at the position by changing the thickness of the washer 22. Adjustments will be made.

Note that it is preferable to cover the electromagnetic magnet 4 and the like from above with the case 23 and the like.

In the embodiment described above, the tube 20 is fixed to the holding member 21 in order to support the bobbin 19 and to reliably guide the plunger 7. However, if the use conditions do not require much support strength, the tube 20 may be fixed to the holding member 21. Alternatively, the bobbin 19 may be directly fitted and supported by the holding member 21.

According to the present invention, each part of the electromagnetic magnet of the automatic release device of the locking device is constructed so that it can be separated from each other, so that it can be assembled at the same time as the locking device, and the electromagnetic magnet can be properly aligned in the stroke direction of the plunger. In addition, the distance between the core and the fixed iron core can be adjusted, so the plunger and the fixed iron core can be easily set to the minimum gap that matches the required stroke of the locking means, and the maximum driving force can be achieved. It has the effect of being able to bring out the

Moreover, the excitation coil, which often fails, can be replaced only by the bobbin around which the excitation coil is wound, and serviceability can be improved.

Further, since the core of the electromagnetic magnet is provided integrally with the base, there is an effect that the electromagnetic magnet can have a simple structure with a small number of parts.

[Brief explanation of the drawing]

1 is a sectional plan view of an automatic release device for a locking device according to the present invention, FIG. 2 is a partially sectional front view taken along line A-A in FIG. 1, and FIG. 3 is a base and a Core development diagram,
FIG. 4 is a partially sectional side view taken along the line B--B in FIG. 1. 1... Fork member, 3... Claw lever, 4... Electromagnetic magnet, 5...
Base, 6... Core, 7... Plunger, 8... Fixed iron core, 18... Exciting coil, 19... Bobbin, 20 ...Tube, 21... Holding member.

Claims (1)

[Claim for Utility Model Registration] In an automatic release device for a lock device that automatically releases the lock of a locking means for locking a door, a lid, etc. to be opened and closed by driving an electromagnetic magnet, the electromagnetic magnet is at least Assemble a locking means that includes a bobbin around which a rough excitation coil is wound, a fork member that locks by fitting into a protrusion protruding from a mating member, and a claw lever that holds the fork member in a locked position. A core that is integrally provided on the base and accommodates the bobbin, a holding member that supports the bobbin, and a core that is slidably inserted into the bobbin and is connected to the claw lever at one end to rotate the claw lever and fork. It consists of a plunger that unlocks the member and a fixed iron core that the other end of the plunger rests against.The fixed iron core is fixed at the center of the core, and one end of the bobbin is fitted into the core with the fixed iron core fitted. At the same time, the end of the bobbin opposite to the fixed iron core is supported by a holding member, the holding member is connected to the core and fixed to the base side, and the plunger is inserted into the bobbin for assembly. , an automatic release device for a locking device, characterized in that the stroke of the plunger changes according to the adjustment of the position of the fixed iron core.