JPH0529330Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a door guard that prevents illegal entry by restricting the opening of a door, similar to a door chain.

[Conventional technology]

Japanese Utility Model Application No. 63-12576 discloses a conventional door guard that prevents illegal entry by restricting door opening. In the door guard, as shown in FIG. 6, a lever 1 is rotatably mounted near the free end of the door via a mounting seat 2, and a receiver 3 that engages with the lever 1 is mounted on the door frame.

The lever 1 is capable of swinging around the support shaft 4 of the mounting seat 2 within the range of a direction substantially parallel to the door surface and a direction standing substantially perpendicular to the door. When the door is in the parallel position, it is held in the unlocked position and the door can be opened freely. When the lever 1 is raised perpendicular to the door with the door closed, it is held in the locked position, and when the door is opened, the lever 1 automatically engages with the receiver 3 and becomes locked. As the door is opened, the lever 1 slides in engagement with the receiver 3, and relative sliding is prevented at the tip of the lever 1, limiting the door to the maximum open position. In this state, the tip of the lever 1 and the receiver 3 are automatically held in a temporarily fixed state.

When lever 1 is pushed in the direction of receiver 3, lever 1
The temporarily fixed state between the lever 1 and the receiver 3 is released, and the door can be closed. When the door is completely closed, the lever 1 is automatically removed from the receiver 3, and the engagement between the two is released.

The above-mentioned temporary fixing is done by attaching L to the surface of the seat plate 5 of the receiver 3.
A pair of letter-shaped engaging pieces 6, 6 are protruded so as to face each other.

In addition, when the protrusion 8 provided in front of the tip of the flange 7 of the lever 1 and the stopper 9 provided at the tip of the flange 7 is recessed, and the engaging piece 6 is fitted into the recessed portion 10, it is temporarily fixed. Become.

[The problem that the idea attempts to solve]

To open the door by releasing the engagement between the lever and the holder, first grasp the knob with one hand, push the lever with the other hand to allow the engagement piece to escape from the recess, and then return to the above-mentioned escape state. If the door is closed while the lever is kept pressed and the engaging piece passes over the protrusion, the continued pressing of the lever can be released, which is time consuming and requires both hands.

[Means to solve the problem]

In order to solve the above problems, this invention has been developed by inserting a lever whose end is swingably supported on the door through a mounting seat into a receiver fixed to the door frame from the end side, and then passing it through. In a door guard that limits the opening of the door to an area where illegal entry is prohibited by contact between a stopper at the tip of the lever and the above-mentioned receiver, the end of a shaft member having a stopper at the tip of the lever is connected to be freely rotatable at a fixed position, Further, a protrusion is provided on the outer peripheral end side of the shaft member, and an inclined groove is provided between the open edges at both ends of the lever through-hole wall of the receiver, obliquely intersecting the shaft edge of the through-hole, through which the protrusion passes; The shaft member is configured to have return rotation ability so that the open end on the stopper side and the protrusion match.

[Effect]

With the door closed, raise the lever approximately at right angles to the door, and then open the door.
First, the distal end of the lever is fitted into the receiver, and then the engaged state in which the lever passes through the through hole is automatically performed, and the lever slides within the through hole.

Then, near the end of sliding, the protrusion and the end of the inclined groove align, and when the protrusion passes through the inclined groove, the shaft member is rotated in one direction, and after passing, the shaft member is returned to the other direction. When rotated, the protrusion and the end of the inclined groove (exit end) will be in a mismatched state, so when the tip of the lever reaches the receiver, the receiver will be located between the stopper and the protrusion. Relative sliding is prevented and the door is held in a fully open position while at the same time being prevented from closing.

Rotate the shaft in one direction to match the end of the inclined groove with the protrusion, and then pull the lever together with the shaft.The door closes and the protrusion passes through the inclined groove (when passing, the shaft (in the other direction), the lever slides inside the through hole, and when the receiver reaches the end of the lever, the door is completely closed.
When the lever is pushed down parallel to the door surface, the engagement between the lever and the receiver is released.

〔Example〕

As shown in the figure, a mounting seat 12 is fixed near the free end of the door A to swingably support the end of the lever 11.

The lever 11 described above is provided with two protrusions 13 on the top and bottom of the surface of the mounting seat 12, and the end of the lever 11 is fitted between the protrusions 13, and is attached via a pin 14 to the surface of the door A. It swings about the pin 14 as the center of rotation within the range of a direction substantially parallel to the door A (the position indicated by the solid line in FIG. 2) and a direction substantially perpendicular to the door A (the position indicated by the solid line in FIG. 3).

If two recesses 15 are provided on the end surface of the lever 11 as shown in the figure, and the protrusion 16 provided in the middle of the leaf spring is fitted into the recesses 15, the lever 11 can be inserted into the door A as described above. It is possible to accurately stop at a position parallel to the plane of the door A and at a position standing approximately perpendicular to the door A.

The lever 11 is composed of a bar 17 and a plate-shaped body 18 extending from the end of the bar 17.

Reference numeral 19 denotes a receiver fixed to the door frame B so as to engage with the lever 11.

The above-described receiver 19 includes a mounting seat 20, a protruding plate 21 that protrudes from the surface of the mounting seat 20 so that the plate surface is perpendicular, and a bar 17 provided so as to pass through the tip of the protruding plate 21. It is composed of a through hole 23 and a notch 22 provided so that the through hole 23 and the end surface of the protruding plate 21 communicate with each other and the plate-like body 18 is inserted. When the door A is opened, the plate member 18 fits into the notch 22, and when the door A is opened, the rod member 17 passes through the through hole 23, and the rod member 17 slides in the engaged state within the through hole 23. Locking is done automatically.

Moreover, at the tip of the bar 17, there is a shaft member 2 that rotates freely.
4 is connected, and the tip of the shaft member 24 has a
A stopper 25 is provided, and when the protruding plate 21 of the receiver 19 comes into contact with the stopper 25 (as shown in FIG. 3), relative sliding is prevented and the door A
to the maximum open position.

The free rotation of the shaft member 24 is achieved by attaching a shaft 2 with a flange 27 to the center through hole 26 of the shaft member 24, as shown in FIG.
8, and after fitting the end of the shaft 28 into the recessed hole 29 at the center of the tip surface of the bar 17, the bar 1
The tip of the screw 30 inserted into the through hole 32 of 7 is connected to the shaft 28.
Although it is screwed into the outer circumferential screw hole 31 of the holder, it may be attached to rotate freely using other structures.

Further, between the open edges at both ends of the wall of the through hole 23, there is an inclined groove 32 that obliquely intersects the axial edge of the through hole 23, and on the outer periphery of the shaft member 24, a protrusion 33 that passes through the inside of the inclined groove 32 is provided. It is set up.

Further, the shaft member 24 is provided with the ability to return to the normal position where the open end of the inclined groove 32 on the stopper 25 side and the protrusion 33 match.

If the above-mentioned return rotational property is provided, the lever 11
When the lever 1 and the receiver 19 are engaged, the lever 1
1 slides against the receiver 19, the inclined groove 32
The protrusion 33 fits into the entrance (towards the side of the stopper 25), and as it passes through the inclined groove 32, the shaft member 24 is rotated in one direction, and when it passes, the shaft member 24 is rotated back in the other direction. The outlet end of the inclined groove 32 and the protrusion 33 are in a mismatched state.

As a result, the protruding plate 21 of the receiver 19, which is housed between the stopper 25 and the protrusion 33, is prevented from relative sliding, thereby restricting the door A to the maximum open position.

In this state, the tip of the lever 11 and the receiver 19 are automatically held in a temporary state, so that the door A cannot be closed and is held in that position, which is suitable for ventilation.

To release the above temporary fix, use stopper 25.
When the lever 11 is pulled with the exit of the inclined groove 32 and the protrusion 33 aligned, the protrusion 33 passes through the inside of the inclined groove 32, and the lever 11 is rotated in one direction. There is a receiver 19 on the end side of the
Sliding movement becomes possible.

In the illustrated case, the return rotation of the shaft member 24 is achieved by providing a recessed portion 34 inwardly from the tip end face of the bar 17 with a diameter larger than the recessed hole 29, and a bowl-shaped portion located within the recessed portion 34. The shaft 28 is passed through the center of the body 35, and the bowl-shaped body 35 is pressed against the end surface of the shaft member 24 by the spring 36 built into the bottom of the recessed part 34.
Further, the open edge of the bowl-shaped body 35 and the end surface of the shaft member 24 are provided with concave and convex portions 37 in which concave portions and protrusions are arranged alternately in succession, and are engaged with each other to provide rotational ability to return to the home position. However, it may be provided by other structures.

〔effect〕

As described above, according to the door guard of this invention, the shaft member is rotated in one direction together with the gripped stopper, and while the door is closed by pulling the lever with the hand gripping the stopper, the lever is held in place by the lever end side. Since the temporary fixing of the tool can be released, the time-consuming operation of releasing the temporary fixing with one hand and pulling the door with the other hand is no longer necessary.

Therefore, the temporary fixing can be smoothly released.

Furthermore, when the protrusion passes through the inclined groove, the shaft member is automatically rotated back and the protrusion and the receiver are automatically engaged, ensuring that relative sliding on the tip side of the lever is prevented. can.

[Brief explanation of drawings]

Figure 1 is a perspective view of the door guard according to this invention.
Figures 2 and 3 are partially cutaway plan views showing the state of use; Figure 4 is an enlarged longitudinal side view of the perspective view material;
FIG. 5 is an exploded perspective view of the same as above, and FIG. 6 is a perspective view of a conventional product. A...Door, B...Door frame, 11...Lever,
12...Mounting seat, 14...Pin, 17...Bar material,
18...Plate-shaped body, 19...Receptacle, 20...Mounting seat, 21...Protruding plate, 22...Notch, 23...
Through hole, 24... Shaft material, 25... Stopper, 32
... Slanted groove, 33 ... Protrusion, 34 ... Recessed part, 3
5... Frame-shaped body, 36... Spring, 37... Uneven part.

Claims (1)

[Scope of utility model registration request] A lever whose end is swingably supported by the door via a mounting seat is inserted from the end side into a holder fixed to the door frame, and then, while passing through, the stopper at the tip of the lever is brought into contact with the holder. In a door guard that restricts the opening of the door to an area where unauthorized entry is prohibited by contact, the end of a shaft member having a stopper at the tip of the lever is connected in a fixed position so as to be freely rotatable,
Further, a protrusion is provided on the outer peripheral end side of the shaft member, and an inclined groove is provided between the open edges at both ends of the wall of the lever through-hole of the receiver, obliquely intersecting the axial edge of the through-hole, and through which the protrusion passes;
Furthermore, the door guard is characterized in that the shaft member is given return rotational ability so that the open end of the inclined groove on the stopper side and the protrusion match.