JPS603548Y2 - release type electromagnet device - Google Patents

Description

[Detailed description of the invention] The present invention is a release type electromagnet device, more specifically, a permanent magnet and an electromagnet are combined, the magnetic force of the permanent magnet is used as the magnetic force for attraction, and the magnetic force of the electromagnet is used for demagnetizing the magnetic force for attraction. This invention relates to a release type electromagnet device consisting of a release type electromagnet that acts as a magnetic force and a movable armature that is attracted to the release type electromagnet.

As is well known, in a release type electromagnet device called a combination magnet that combines a permanent magnet and an electromagnet, if dust or dirt gets between the armature attraction surface of the electromagnet and the armature, the armature will stick tightly to the attraction surface. As a result, a gap is created between the two, and the attraction force due to magnetic force is extremely reduced, making it impossible to perform the attraction function.

Therefore, to prevent this, the entire electromagnet device is usually placed in a dust-proof case.

Next, an example of a conventional dustproof cover of this kind will be explained with reference to FIG.

In FIG. 1, a release type electromagnet device 1 includes a U-shaped yoke 2 that holds a permanent magnet (not shown) between them to form a permanent magnet body, and an attraction magnetic force wrapped around this yoke 2. an electromagnet winding 3 for demagnetizing the yoke mounting body 2;
c, and an armature 7 disposed opposite to the suction surface 2a of the yoke 2.

The armature 7 is rotatably supported by a fixed mounting shaft 6 at the distal end of an operating arm 5 whose base is rotatably supported by a fixed shaft 4 implanted in an immovable member.

In normal life, the armature 7 is attracted to its attraction surface 2a by the magnetic force of the yoke 2, which is a permanent magnet, against the tensile elasticity of the coil spring 8 applied to the central part of the operating arm 5 and the stationary member. However, when the electromagnet winding 3 is energized and an electromagnetic force is generated in the yoke 2, and the magnetic force is demagnetized by this electromagnetic force, the attracting force is lost, so the tension of the coil spring 8 is reduced. The force causes the actuating arm 5 to rotate about the fixed shaft 4 in the direction of arrow a.

Then, the actuating lever 9 of the actuated member that is in contact with the side edge of the thoracotomy 5 is pushed in the direction of the arrow to perform a predetermined operation.

Then, as soon as the power to the electromagnet winding 3 is cut off, the normal state is restored.

The range of rotation of the operating arm 5 is restricted by a stop bar (not shown) to a range in which the armature 7 is attracted by the magnetic force of the yoke 2, which is a permanent magnet.

Further, the yoke 2 is inserted through a mounting hole 10 formed in a plate-shaped mounting portion 2b that protrudes rearward from the mounting body 2c.
It is fixed to the device body (not shown) by mounting screws (not shown).

The dust-proof cover 11 that covers the open-release electromagnet device 1 configured as described above is formed of a rectangular casing made of an insulating material such as plastic material, as shown by the two-dot chain line in the figure, and can be used as appropriate. It is fixed to the main body of the device (not shown).

However, as shown in the figure, this dustproof cover 11 has a long hole 12 through which the operating arm 5 of the electromagnet device 1 is inserted, a long hole 13 through which the mounting portion 2b of the yoke 2 is inserted, and a conductor 3a of the electromagnet winding 3. Through-holes 14 and the like are formed on the top and side surfaces of the electromagnetic device 1, so that the electromagnetic device 1 cannot be completely covered.

Therefore, even with the dustproof cover 11, the dustproofing of the electromagnet device 1 is not complete.
．． 14, the problem is that dust and the like enter the inside of the electromagnetic device, deteriorating the adsorption function of the electromagnet device.

In view of the above points, an object of the present invention is to arrange the above-mentioned open-release type electromagnet in a box-shaped case whose negative side is open, and to attach a movable armature that is attracted to the electromagnet to the open side of the case. To provide an open type electromagnet device which does not require a dustproof cover and which completely protects the electromagnet device from dust by attaching it to the inner surface of a movable covering lid.

According to the present invention, there are no openings for dust etc. to enter, so
Both surfaces where the release type electromagnet and the armature collide are completely dust-proof, and there is no need to provide a special dust cover, making it possible to provide an extremely effective release type electromagnet device with a simple structure and a small number of parts. .

Hereinafter, the present invention will be explained based on the illustrated embodiments.

FIG. 2 is an external perspective view of a release type electromagnet device 21 of the present invention, and this device 21 has a release type electromagnet 24 (
A rectangular box-shaped casing 22 made of insulating material and having one side open is equipped with an electromagnet (see FIG.
The lid body 23 is made of an insulating material and has a rectangular plate shape and rotatably supports an armature 25 (see FIG. 4) facing the suction surface of the armature 25 (see FIG. 4).

An actuating lever pushing part 26 extending upward is formed at the left end of the lid 23, and this pushing part 26
An actuating lever 27 is in contact with the outer edge of the actuating lever 27 .

The upper and lower edges of the right side portion 23a of the pushing portion 26 of the lid body 23 protrude toward the front side of the opening edge 22a of the housing 22, and then extend in the direction toward each other. Two pairs of hook-shaped lid guide portions 28a are formed.

28b, 29a, and 29b, the lid body 23 is
It is designed to slide along the opening surface 22b (see FIG. 3) of the housing 22 in the longitudinal direction, that is, in the direction shown by arrow C.

Further, as shown in FIG. 4, a through hole 25 of the armature 25 is provided in the center of the inner surface of the lid body 23 on the left side.
A mounting shaft 30 that fits into the armature b and rotatably supports the armature 25 is fixedly planted.

Then, the lid body 23 is in the state shown in FIG.
In a state where the entire opening surface 22b of the armature 25 is slidably covered in the direction of arrow C, the attracted surface 2 of the armature 25 is
5a is brought into close contact with the attraction surface 24a (see FIG. 3) by the magnetic force of the permanent magnet of the release type electromagnet 24 in the housing 22.

The casing 22 and the lid 23 are both easily obtained by molding an insulating plastic material, etc.
By making the tip of a into a thin claw shape, when assembling the two, the lid 23
By tilting and fitting the lower end into the lower lid guide portions 28b, 29b of the housing 22 first, and then pressing the upper end toward the opening surface, the upper lid guide portion 28aw is pressed.
The lower end portion of 29a is bent inward against its elasticity, so that the lid body 23 can be suitably fitted into the guide portions 28a and 29a.

That is, the housing 22 and the lid 23 can be easily assembled with the electromagnet 24 and the armature 25 attached, respectively.

The electromagnet device 21 assembled in this way has a housing 2
The rear wall of 2 passes through a through hole 32 of a mounting portion 31 formed by extending laterally, and is fixed to the device main body (not shown) with a mounting screw (not shown).

The lid 23 is held so as to move in the direction of arrow C (see FIG. 2) by a coil spring 33 applied to the lid 23 and an immovable member, but the range of movement is limited by a stopper (not shown). The magnetic force of the permanent magnet of the electromagnet 24 is suppressed to the extent that the armature 25 can be attracted.

Therefore, in a normal state where the electromagnet 24 is not demagnetized, the armature 25 is attracted to the electromagnet 24 by the magnetic force of the permanent magnet.

In this state, the operating lever 27 is
7 and the tensile elasticity of the weak coil spring 34 applied to the immovable member, the right edge thereof is brought into contact with the left edge of the operating lever pushing portion 26 of the lid body 23.

Then, the electromagnet 24 is demagnetized, and the armature 25
When the adsorption force to the armature 25 is released, the lid body 23 integrated with the armature 25 moves in the direction of arrow C due to the strong tensile elasticity of the coil spring 33, and the guide members 28a, 28b, 2
9ay 29b, and moves until it is stopped by the stopper (not shown).

When the lid body 23 moves in the direction of arrow C, the pushing part 26 integrated therewith moves the operating lever 27 in the direction of arrow C against the weak tensile elasticity of the coil spring 34 applied to the lever 27 and a stationary member. Since the lever is pushed, the main body of the device is operated by the same lever.

Note that the action of this operating lever is no different from that of conventional release type electromagnet devices of this type.

In this way, the casing 22 and lid 23 according to the present invention have the following features:
There is no milk connected to the outside, and the built-in electromagnet 24,
Armature 25 is completely covered.

Therefore, this device 21 does not particularly require a dustproof cover, and has a complete dustproof cover function, rather than being incomplete like conventional dustproof covers.

6 and 7 are an external perspective view and an exploded perspective view of a release type electromagnet device showing another embodiment of the present invention.

The release-type electromagnet device 41 in this embodiment is different from the release-type electromagnet device 21 shown in FIG. Therefore, the same members are designated by the same reference numerals and their explanations will be omitted.

The housing 42 of this device 41 is different from the housing 22 in FIG.
゛It is a rectangular box-like box made of insulating material with an open front face of the same shape and a release type electromagnet 24 stored inside. A spindle mounting part 45 on which a spindle 44 that rotatably supports the body 43 is installed.
is formed.

Further, at the lower left corner of the opening side edge 42a of the housing 42, there is a hook-shaped lid guide portion that protrudes forward and extends rearward and upward, into which the lower left end of the lid 43 is fitted. 46 is formed.

Further, the rear wall of the housing 42 extends to the right to form a mounting portion 47 to the main body of the device (not shown).

A plate-shaped lid 43 made of an insulating material and having a horizontally elongated partial arc shape covers the entire opening surface 42b of the housing 42, and its upper end on the right side bulges upward. A through hole 48 is bored in the bulging portion to fit into a support shaft 44 implanted in the casing 42 .

Further, the inner surface of the center portion of the lid body 43 on the left side is fitted into the through hole 25b of the armature 25, and the armature 25 is fitted into the through hole 25b of the armature 25.
A mounting shaft 49 that rotatably supports the is installed.

After attaching the armature 25 to the lid 43, the support shaft 44 of the housing 42 is fitted into the through hole 48, and the lower left corner of the lid 43 is inserted into the lid of the housing 42. As shown in FIG.
The device 41 is assembled by fitting the parts and the like to prevent them from coming off.

In this case as well, the attracting surface 24a of the built-in electromagnet 24 and the attracting surface 25a of the armature 25 face each other so as to be in close contact with each other, as in the case of the electromagnet device 21 shown in FIG. 2 above.

The electromagnetic device 41 configured in this way has a cover body 43.
is attached to the main body of the device (not shown) so that the left side edge thereof faces the actuating lever 27.

In this case, the lid 43 has a tendency to rotate clockwise about the support shaft 44 due to the tensile elasticity of the coil spring 33 applied to the lid 43 and the immovable member.

When the armature 25, which is integrated with the lid body 43, is released from the magnetic attraction by the electromagnet 24, it rotates in the same direction, and its front end engages the actuating lever 27 with the immovable member. The lever 27 is actuated by pushing against the weak tensile elasticity of the coil spring 34.

That is, in the release type electromagnet device 21 shown in FIG. The difference is that the operating lever 27 is operated by rotating it around, and the structure is that much simpler.

However, the action is performed in exactly the same way.

As explained above, the present invention does not require a special dustproof cover, has a complete dustproof function that could not be achieved with conventional dustproof covers of this type, and has an extremely simple structure. type electromagnet device can be provided.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of a dustproof cover in a conventional release type electromagnet device, Fig. 2 is a perspective view of a release type electromagnet device showing an embodiment of the present invention, and Figs. Figure 2 is an exploded perspective view of the release type electromagnet device, Figure 5 is a sectional view of the main parts of the release type electromagnet device shown in Figure 2, and Figure 6 is an exploded perspective view of the release type electromagnet device shown in another embodiment of the present invention. The perspective view, FIG. 7, is an exploded perspective view of the release type electromagnet device shown in FIG. 6 above. 1.21.41...Release type electromagnet device, 7,2
5...Amateur, 22,42...
Housing, 23.43... Lid body, 24...
Release type electromagnet.

Claims (1)

[Scope of utility model registration request] In a release-type electromagnet device comprising a release-type electromagnet in which the magnetic force of a permanent magnet is used as an attraction magnetic force, and the magnetic force of an electromagnet is used as a demagnetization force of the attraction magnetic force, and a movable armature that is attracted to the release-type electromagnet, the release-type electromagnet is - disposed in a dustproof housing made of an insulating material with an open surface, and covering the opening surface of the housing with a plate-shaped lid made of an insulating material that is movable along the same surface; A release type electromagnet device characterized in that the movable armature, which is separated and attracted to the electromagnet, is attached to the inner surface of the lid so that the lid serves as an operating member and a dustproof cover.