JPH0230606Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a catcher for doors of cabinets etc. that uses permanent magnets, and in particular, the invention uses a permanent magnet to open and close the door as a series of smooth movements, and to prevent the generation of shock when opening and closing the door. The present invention relates to a door catcher which is designed to suppress this as much as possible, and also to prevent a door, etc., from being re-adsorbed once it has been opened.

[Prior art]

In conventional catchers used for this type of door, the permanent magnet part constituting the attraction surface protrudes while being attracted to a ferromagnetic plate etc. provided on the door surface side, and uses the protruding force to attach to the door. This device provides inertia to push the door forward against the suction force, and requires a large amount of protrusion force to push the door away, and also generates a considerable impact on the door surface when the suction surface separates. Since the magnetic part directly constitutes the attracting part, there is a problem in that the door that has been pushed away will swing back and be attracted to the magnet surface again.

In order to solve this problem, the adsorption part is composed of a permanent magnet and a yoke attached to the magnet so that it can slide into contact with the magnet.By moving the yoke in the direction in which the door projects and moving it away from the magnet, the lines of magnetic force of the yoke can be reduced. There was a door catcher that was made sparse to prevent re-magnetization.

[The problem that the idea aims to solve]

In such conventional catchers, so-called plate-shaped magnets having magnetic poles on the front and back sides are used as they are, so many When attempting to move the door in the protruding direction while receiving contact with magnetic lines of force, the sliding movement of the yoke will be performed on the magnetic pole surface, and in such a case, the sliding movement itself becomes obstructed by the influence of magnetic lines of force. Moreover, in cases where these mutual members are in sliding contact on a surface, this problem becomes even more pronounced, and a mechanism for strongly protruding the yoke is required.

In addition, in the case of a magnet attached to a yoke that is moved toward the door, the magnetic pole face of the magnet is set at a position perpendicular to the surface of the member to be attracted, such as a ferromagnetic plate, provided on the door side. Therefore, it is not possible to directly attract the attracted member with the magnetic pole surface, and the attracting force of the attracted member depends only on the lines of magnetic force communicated via the yoke, and the magnetic force of the magnet is maximized. It was impossible to utilize it.

[Means to solve the problem]

The present invention was devised in view of the inconveniences in the conventional precedent, and in order to achieve the effectiveness of the various characteristics, the structure is such that the hole 1a is oriented from one magnetic pole surface to the other magnetic pole surface. A ferromagnetic plate 3 having a hole 3a communicating with the hole 1a of the magnet 1 is attached to one magnetic pole surface of the magnet 1 in which the hole 1a of the permanent magnet 1 is opened.
A yoke 2 is fitted into the hole edge 3a' of the ferromagnetic plate 3 so as to be freely protrusive and retractable, and when the yoke 2 is pushed, the engagement is released and the yoke 2 is pushed out. , and one suction tool main body a configured to engage in the pushed-in position when the yoke 2 is pushed again, and the suction tool main body a attached to the door side.
It was placed at a point consisting of a ferromagnetic plate b and a ferromagnetic plate b.

[Effect]

As the yoke 2 protrudes beyond the movement of the suction tool body a due to the action of the suction tool body a, the door that was being pushed by the suction tool main body a is pushed out and accelerated in stages by the yoke 2, and as the yoke 2 protrudes. , the abutting top end of the yoke 2 and the magnet 1 are separated from each other to significantly reduce the number of lines of magnetic force passing through the abutting top end of the yoke 2, thereby reducing the attraction force.

That is, on the one hand, the opening of the door is accelerated by the protrusion of the yoke 2, and at the same time, on the other hand, the adsorption capacity is weakened, and at the end of the protrusion of the yoke, almost no magnetic field is left to attract the door, and the door cannot be pushed in. As a result, the abutting top end of the yoke 2 is brought closer to the magnet 1, the number of lines of magnetic force is increased in this area, and the attraction force is gradually increased to re-adsorb the door.

〔Example〕

A typical embodiment of the catcher according to the present invention will be described below with reference to the attached drawings. 1 is a permanent magnet as a main attraction, 2 is a yoke that connects the magnetic pole faces of the magnet 1, and 4 is a magnet. This figure shows a catcher body to which a magnet 1, a yoke 2, etc. are attached, and the magnet 1 has a hole 1a opened from one magnetic pole surface to the other magnetic pole surface, and a ferromagnetic plate 3 on one magnetic pole surface. A case 5 made of a ferromagnetic or non-magnetic material is attached, and these magnets 1 and the ferromagnetic plate 3 are held together to form an adsorbent main body a.

The ferromagnetic plate 3 has a hole 3a that communicates with the hole 1a of the magnet 1, and the inner peripheral edge of the hole 3a of the ferromagnetic plate 3 is folded in the direction of the hole 1a to form a hole that comes into contact with the surface of the hole 1a. The yoke 2 retracted from the hole 1a of the magnet 1 is in sliding contact with the hole edge 3a' of the ferromagnetic plate 3, and the lines of magnetic force connected from the magnet 1 to the ferromagnetic plate 3 are connected to the hole. It is focused on the yoke 2 via 1a.

The case 5 is generally in the shape of an inverted dish, and has a hole 5a on the bottom that communicates with the previous hole 1a, and a bending claw 5b on the edge of the opening for attaching the ferromagnetic plate 3. It locks the leg members 6, etc.

The leg member 6 provided on the suction tool main body a is
A claw 6 is provided in a sliding groove 4a provided in the catcher body 4 to ensure the back and forth movement of the suction tool body a.
a to restrict the width of forward and backward movement,
The suction tool body a is attached to the catcher body 4 while preventing it from coming off from the catcher body 4.

The mounting leg member 6 has a hole 6b' communicating with the hole 1a in the disc part 6b, and the peripheral edge of the disc part 6b stands up so as to intervene between the ferromagnetic plate 3 and the case 5. A rising edge flange 6c is used to securely fasten the leg member 6 and to form a magnetic gap with the ferromagnetic plate 3 when the case 5 is a ferromagnetic member.

Further, the leg portions 6d of the leg member 6 have elasticity so as to be projected in pairs by the disc portion 6b, and the leg portions 6d are designed to have elasticity so as to be projected in pairs by the disk portion 6b, so that the suction tool main body a can be moved back and forth without strain. The outer circumferential surface of the catcher 6d is in snap-sliding contact with the operating port 4b of the catcher body 4.

The yoke 2, which is fitted into the hole 1a of the magnet 1, is elastically mounted on the suction tool main body a with a spring 7 provided on the catcher main body 4 side so that the yoke 2 can come out and go in and out of the hole 1a. The end of the yoke 2 is pushed inward by a pushing operation, disengaging from the engagement, protruding from the suction tool body a with the spring 7 at the end, and then being pushed inward by the pushing operation of the yoke 2. The suction tool body a is pushed in, and is re-engaged by pushing it back a little further from the state where it is flush with the suction tool main body a, and is engaged against the force of the spring 7.

Various configurations are planned for the operating method of the yoke 2, and the illustrated example is a typical example in which an operating piece 8 is provided at the mounting base of the yoke 2, and The operating piece 8 is always pushed in the direction of the suction tool main body a by the spring 7, and the operating rod 10 is engaged with the groove 9 provided in the piece 8, so that the piece 8 can be moved back and forth, and The rod 10 engaged with the groove 9 is engaged and released from the engaged state during dynamic operation.
The tip is bent in a negative shape, and is fixed to the catcher body 4 with a spring 11 so that the tip is always in pressure contact with the inner bottom surface of the groove 9. It was moved sequentially along the

Note that the groove 9 of the piece 8 is connected to the yoke 2 as shown in the figure.
The groove 9 is configured to become gradually deeper linearly from the section 9a toward the section 9b in order to perform the above series of operations.
The groove 9 is made into a flat V-shape so as to be inverted again from the 9c part to the 9d part, and the pushed rod 10 is moved from the 9b part to the 9c part. guide and ensure an engaged state at the portion 9c.

In such a situation, by pushing the yoke 2 again, the rod 10 is guided toward the lower side of the groove 9, that is, in the direction 9d, and by releasing the pushing, the rod 10 is guided toward the lower side of the groove 9, 9e.
along the direction 9f, and is rapidly pushed back to point 9a by the spring 7.

The groove 9 is made gradually shallower than 9e, and at the point of contact with 9f, the depth of the groove 9 is shallower than that of 9f to form a circle line directed in one direction of the rod 10.

[Effect of idea]

The catcher according to the present invention has the above-mentioned characteristic structure, so that when the yoke 2 contacts and magnetizes the ferromagnetic plate b on the door side to form a magnetic closed circuit, the yoke 2 is placed between the magnetic pole faces of the magnet 1. The magnetic field formed between the ferromagnetic plate 3 and the ferromagnetic plate b on the door side is communicated to produce a strong attraction force, and when the yoke 2 is in the protruding state, There is no re-adsorption with the ferromagnetic plate b, and the adsorption force is gradually increased even when the door is pushed in to re-adsorb, making it possible to achieve particularly smooth re-adsorption.

Particularly, in the present invention, a magnet 1 having a hole 1a opened from one magnetic pole surface toward the other magnetic pole surface is used as the attracting body on which the yoke 2 is expected to come into sliding contact. By inserting and inserting the yoke 2 in a manner that it can freely protrude and retract, the magnetic pole surface of the magnet 1 is brought into surface contact with the ferromagnetic plate b provided on the door side, and a direct line of magnetic force from the magnet 1 is generated. It was possible to increase the adsorption power.

In addition, since the lines of magnetic force are connected to the yoke 2 through the hole edge 3a' of the ferromagnetic plate 3 attached to one magnetic pole surface, the lines of magnetic force are transmitted from the entire circumferential surface of the yoke 2 in contact with the hole edge 3a'. The lines of magnetic force are actively focused in one direction, and there is a gap between the yoke 2 and the other magnetic pole face facing the ferromagnetic plate b on the door side. Because of the structure, the lines of magnetic force in this part once form a magnetic field on the side of the ferromagnetic plate b, and then are guided to the yoke 2, so that most of the lines of magnetic force of the magnet 1 used are focused on the abutting end surface of the yoke 2. Develops strong adsorption force by focusing magnetic lines of force.

Furthermore, since the yoke 2 is fitted into the hole 1a opened perpendicularly to each magnetic pole surface of the magnet 1, and the yoke 2 is configured to avoid sliding contact with the magnetic pole surface, This prevents the sliding motion from being inhibited by direct lines of magnetic force on the magnetic pole surface, and enables good ejecting and pushing motions.

[Brief explanation of the drawing]

1 to 3 are sectional views of main parts showing the operation of the catcher according to the present invention, and FIG. 4 is a plan view of the piece 8.
FIG. 5 is a sectional view taken along the line AA, and FIG. 6 is a sectional view taken along the line BB. In addition, in the figure 1... permanent magnet, 2... yoke, 3...
...Ferromagnetic plate, 4... Catcher body, 5... Case, 6... Leg member, 7... Spring, 8...
Operating piece, 9...groove, 10... operating stick, 11... spring.

Claims (1)

[Scope of utility model registration request] Hole 1a from one magnetic pole face to the other magnetic pole face
A ferromagnetic plate 3 having a hole 3a communicating with the hole 1a of the magnet 1 on one magnetic pole surface of the permanent magnet 1.
A yoke 2 is fitted into the hole 1a of the magnet 1 so as to be freely protrusive and retractable so as to be in sliding contact with the hole edge 3a' of the ferromagnetic plate 3. One suction tool main body a is configured to be disengaged and protruded when the yoke 2 is pushed, and then engaged in the pushed-in position when the yoke 2 is pushed again; A door catcher comprising a ferromagnetic plate b magnetically attached to a.