JPS63280175A - Door catcher - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention is attached to a room door, a cabinet door, a furniture door, a floor, etc., and uses the attraction force of a permanent magnet to hold the door in an open state. To provide a door catcher which can be securely held and can be closed with a simple operation of just pulling the door away from the door stop.

(Prior art) Conventionally, in order to maintain a sliding door in an open state, a door stop with an end facing the open door was fixed, and a hook attached to the door stop was pulled to a metal fitting attached to the door surface. Those that could be hung and locked were generally used.

(Problem to be Solved by the Invention) However, in the conventional door catcher as described above, in order to lock the opened door with the hook on the doorstop, the user must bend his/her body or lean forward to release the hook. It was necessary to hang it on the metal fittings of the door.

In addition, the holes in the door locking fittings are usually made large enough to make it easier to hang the hook, but when the door is fanned by the wind, it rattles, and in some cases, the hook may come off the fitting. was there.

(Means for Solving the Problems) The present invention is a door catcher provided to solve the above problems, and is a permanent magnet having a hole 1a extending from one magnetic pole face a to the other magnetic pole face. 1, a ferromagnetic plate 2 attached to the magnetic pole face a, and a ferromagnetic plate 3 abutted on the magnetic pole face
ferromagnetic protrusion 2a protruding from either or both of the
, 3a are connected to each other through the hole 1a or to the ferromagnetic plate 2.
Or, one of the pair of suctions AA and B, which are removably suctioned to 3, is swingably attached to the surface of the door, and the other is attached to the surface of the doorstop provided opposite to the chain line. It is structured as follows.

(Function) When the door catcher configured as shown in F is opened and hit against the door stop C, a pair of suction Jt-A attached to the door face and the door catch C facing this face will be released. , B are attracted and the door is held in that position, and the adsorbers A and B are attached to a ferromagnetic plate 2.3 on which the lines of magnetic force of the permanent magnet 1 are in contact with both magnetic pole faces a and b, and the ferromagnetic plate. The ferromagnetic protrusions 2a and 3a protruding from 2.3 and attracting in the hole la are used as a magnetic path.

Since the number of lines of magnetic force that leaks to the outside becomes extremely small, the adsorption force becomes particularly strong.

In addition, one of the suction devices attached to the door is attached so that it can be swung, so it can always face the suction device of door stop C correctly, ensuring accurate suction and preventing the groove from being blown by the wind. Since it can follow even if it is attracted by magnetic force, a lever-like force with one end as a fulcrum does not act on the attracting surface, which is a weak point in magnetic attraction, and the attraction is difficult to remove.

(Example) The implementation of the door catcher according to the present invention will be described below with reference to the drawings.

A is a suction tool, and B is a suction target, where the suction tool A is attached to the door surface, and the suction target AB is attached to the front surface of a doorstop C provided opposite to the door surface. .

The suction tool A has a disk-shaped ferromagnetic plate 2 attached to the magnetic pole surface a of a plate-shaped permanent magnet l having a hole 1a extending from one magnetic pole surface a to the other magnetic pole surface, and a hole 1a in the bottom. A permanent magnet 1 is placed inside an inverted dish-shaped non-magnetic case 4 having a hole 4a communicating with the magnet 1a.
The permanent magnet l and the ferromagnetic plate 2 are inserted into the case 4 with the magnetic pole face facing inward, and the permanent magnet l and the ferromagnetic plate 2
and are held together. Reference numeral 5 denotes a dish-shaped frame made of plastic, non-magnetic metal, etc., and has an inner diameter large enough to provide a gap with the outer circumferential surface of the suction tool A, and has a bottom portion extending outward by 5 degrees. The flange portion 5'' is adhered to the door using wood screws 6 or the like, and a hole 5°a with a reduced diameter on the inner bottom side is bored in the center of the bottom 5°.

Further, the ferromagnetic plate 2 of the suction tool A has a small diameter push part 2a at one end.
A ferromagnetic protrusion 2a having a ferromagnetic protrusion 2a is protruded by inserting the small diameter push part 2a' into the ferromagnetic plate 2, and is positioned in the hole la, and a small diameter rod i' protrudes from the ferromagnetic plate 2. 1112a' is inserted into the hole 5'a, and the protruding tip is formed into an enlarged head 2a'' within the hole 5a'.

The suction tool A is swingably attached to the frame 5 with the side facing the magnetic pole protruding slightly.

In addition, the attracted tool B is constructed by inserting a ferromagnetic protrusion 3a having a small diameter push part 3a' with a male thread at one end inserted into the center of a disc-shaped ferromagnetic plate 3. It can be attached to the surface of the door by screwing into a female screw hole C made in a door stop C of an appropriate shape made of plastic or non-magnetic metal, which is fixed and fixed on the floor. In tool A and tool B, the ferromagnetic plate 3 is attracted to the side facing the magnetic pole, and the ferromagnetic projections 2a and 3a are attracted to η in the hole la, and the ferromagnetic projections 2a and 3a are As shown in Figure 1, the length of the suction tool A is such that they can be sucked together in the hole la, and as shown in Figure 2 (a), the suction tool A
There are two cases: a case in which only the ferromagnetic protrusion 2a is provided to directly attract the ferromagnetic plate 3 of the device B to be attracted, and a case in which only the ferromagnetic protrusion 3a is provided conversely as shown in FIG. 2(b). be.

Furthermore, when assembling the ferromagnetic protrusion 2a, the ferromagnetic plate 2, and the frame 5, the ferromagnetic plate 2 and the small-diameter push part 2a' are fixed by caulking, and the frame 5 is attached so that its bottom 5'' The shape is spaced apart from the mounting surface, and the tip of the small-diameter push part 2a' protruding from the bottom 5° is a male thread, and a nut is screwed onto the tip protruding from the bottom plate 5' of the frame 5. It may be attached to the frame 5 so that it can swing freely.

In addition, when the case 4 covers the side facing the magnetic pole as shown in FIG. 1, the suction tool A has a short cylindrical shape as shown in FIG. 3(a), and the side facing the magnetic pole If the surface of the case 4 facing the magnetic pole is exposed, or as shown in FIG. (Effective when there is no ferromagnetic protrusion 3a on the suction tool B) and prevents close contact with the magnetic pole face by the ridge 4C when a magnetic recording object such as a cash card accidentally comes into contact with the magnetic pole face. In some cases, an attempt is made to prevent the negative influence of magnetism on magnetic recording.

Figure 4 shows various embodiments of the magnetically shielded type suction tool A, and (a) shows a ferromagnetic magnetic shield plate 7 interposed between the case 4 and the magnetic pole face, and protrudes from the magnetic pole face side of the case 4. (b) is a case in which the circumferential edge of a magnetic shield plate 7 attached to the side facing the magnetic pole is secured by a cylindrical case 4, and (c) is a case in which a magnetic pole + (
A magnetic shield plate 7 is attached to +jb to prevent magnetic leakage from the magnetic pole face when both are not attracting ri.

Figure 5 shows (a) the permanent magnet l as a plastic magnet molded from synthetic resin containing hard magnetic powder, the case 4 omitted, and the ferromagnetic plate 2 buried in the magnetic pole face a side of the permanent magnet 1. , FIG. 4(c) also uses plastic magnets. Further, in FIG. 5(b), a protruding peripheral edge 1b is formed on the magnetic pole face by the plastic magnet itself.

FIG. 6 shows various embodiments of the suction target B other than the above,
(a) shows the ferromagnetic protrusion 3a caulked to the ferromagnetic plate 3° by a short small-diameter pusher 3a', and (b) shows the ferromagnetic plate 3 and the ferromagnetic plate sized to face the magnetic pole surface of the suction tool A. A seat plate 3" having a larger diameter than the magnetic plate 3 (not necessarily made of ferromagnetic material) is caulked. (c) is integrally molded with a ferromagnetic material in the same shape as (b). The suction target B is attached to the surface of the door stop C using a double-sided adhesive sheet or an adhesive, or the seat plate 3'' or the outer periphery of the suction target B is attached with bolts,
It is designed to be fastened with wood screws, nails, etc.

In the above embodiment, the suction tool A is installed on the door and the suction target B is installed on the door stop C, but in all of these, the suction tool A is installed on the door stop C as shown in the example shown in FIG. The suction target B may be provided on the door.

In that case, the length, shape, etc. of the small diameter push part of the ferromagnetic protrusion are also changed as appropriate.

It may also be used as a door catcher for temporarily securing a cabinet door.

(Effects) Since the door catcher according to the present invention is constructed as described above, by simply opening the door to the door stop installation position, the door attracts the door stop and the open state is maintained, and the permanent magnet is activated. Due to the above-mentioned structure of the pair of suction tubes used, the lines of magnetic force are concentrated on the ferromagnetic protrusion that is attracted in the hole of the permanent magnet, so a strong suction force is obtained. Since it is supported so that it can swing, it moves to follow the movement of the door, and the two adhesion surfaces always face each other, so that the attraction surface, which is the weak point of magnetic attraction, receives a force that pulls it away from one end. It never hangs.

Furthermore, when the door no longer needs to be kept open, it can be easily closed by pulling it away from the Ph, and there is no need for the conventional operations such as unhooking and unhooking the anti-slip hook.

In addition, it has an excellent design with a clean appearance that does not allow the interior to be seen, and is also sturdy, and can be used for entrance doors, cabinet doors for audio equipment, doors for furniture such as chests of drawers, etc.
Sink metal ring Suitable as a door catcher for lower kitchen doors, etc., or as a door catcher for temporary fixing of cabinets.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an embodiment of a door catcher according to the present invention, Fig. 2 is a sectional view showing various embodiments of a pair of suction devices, and Figs. 3 to 5 are sectional views showing various embodiments of a suction device. 6 is a sectional view showing various embodiments of the suction target, and FIG. 7 is a sectional view of another embodiment of the door catcher.

Claims (1)

[Claims] A ferromagnetic plate 2 attached to a magnetic pole surface a of a permanent magnet 1 having a hole 1a extending from one magnetic pole surface a to the other magnetic pole surface b;
Ferromagnetic protrusions 2a and 3a protruding from either or both of the ferromagnetic plate 3 that abuts the magnetic pole surface b can be detachably attached to each other or to the ferromagnetic plate 2 or 3 through the hole 1a. A door catcher characterized in that one of the pair of suction tools is swingably attached to the surface of the door, and the other is attached to the surface of a doorstop provided opposite to the door. .