JPH0440371Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The invention prevents unwanted people from entering by allowing the door to open at a predetermined angle so that foreigners can be identified.
This invention relates to a guard fitting for a door that can achieve a crime prevention effect.

[Conventional technology]

Arm-type security fittings are currently known as an alternative to conventional door chains.

The above-mentioned safety fitting has an arm that is rotatably supported on a base, and can be freely engaged and detached from the arm only when the door is closed.
and a catch that is slidably engaged when the door is opened, and in the case of an outward-opening door, the above-mentioned pedestal is attached to the inner surface of the door, and the above-mentioned catch is attached to correspond to the jamb, respectively, In the non-cautious state, that is, the state in which the door is normally opened and closed, the above-mentioned arm is rotated in a direction along the inner surface of the door, and when in the cautious state, the above-mentioned arm is rotated and raised in a direction approximately perpendicular to the inner surface of the door. At least the effective stroke of the arm that engages with the catch and allows the door to be opened is such that there is a space between the door and the jamb that is sufficient for viewing from indoors to outdoors, and that there is no space between unnecessary persons. The structure is designed to ensure a gap sufficient to prevent intrusion.

However, since the conventional security fittings do not have any means to prevent the arm from swinging, when opening and closing the door normally with the arm in a non-cautious state, especially when the door is closed forcefully, vibrations may cause damage. The arm often rotates in the direction of the caution position, and it is very troublesome to have to return the arm from the caution position to the non-care position each time. Failure to do so may cause problems such as the arm and catch becoming engaged, making it impossible to open the door normally, or the arm colliding with the catch when closing the door, causing damage. There is.

[Problem that the invention attempts to solve]

In order to solve the above-mentioned problems, the present invention is configured with a function to prevent the arm from moving steadily, thereby making it possible to reliably hold the arm in a non-careful position and to move the arm from the non-careful position. in a cautious position,
or vice versa, with easy operation.
The purpose is to ensure that this can be done.

[Means for solving problems]

That is, the present invention provides a door comprising an arm rotatably supported on a pedestal, and a seat that can be freely engaged with and detached from the arm only when the door is closed, and that is slidably engaged with the arm when the door is opened. In the safety fitting, a square hole is provided near the arm shaft bearing part of the pedestal so that the slider can be slid vertically, and push pins protruding symmetrically outward from both the upper and lower sides of the slider are respectively removed from the pedestal. The slider is held in a neutral position by interposing springs between its upper and lower sides and the pedestal, respectively, so that the slider is in the neutral position and the arm is in the neutral position. The above problem has been solved by providing a notch on one side of the shaft support of the arm that engages with the slider in a careless state along the door.

〔Example〕

Embodiments of the present invention will be described below in detail based on the drawings. As shown in FIGS. 1 to 5, a door 1 is pivoted to a jamb 2 by a hinge or the like (not shown) so that it can be opened and closed. Therefore, on the pedestal 4 which is fixed to the inner surface of the open end side of the door 1 with screws 3, etc., a pair of brackets 5, 5 are jutted and arranged in parallel at appropriate intervals, and both brackets 5 .

The arm 6 is formed into a substantially U-shape from the front, and engages and disengages the engaging portion 9 with the head 9a of the catch 8 fixed to the rigid frame 2 by screws etc. only when the door is closed. A guide portion 10 that is wider than the diameter of the head 9a is provided at the base end, and when the guide portion 10 and the engaging portion 9 are engaged, the engaging portion can be opened by opening the door. The neck portion 9b of the arm 9 and the sliding portion 11 that is slidable are formed into an elongated hole shape that is narrower than the diameter of the head 9a in the engaging portion 9 and is equal to or slightly wider than the diameter of the neck portion 9b. 6
It is provided on the distal end side of the guide portion 10 in communication with the guide portion 10, and its distal end is provided at the closed end.

Thus, the base end of the arm 6 is bifurcated, and both base ends are connected to the respective brackets 5, 5.
They are pivotally connected to each other by shaft pins 7, 7, respectively.

Further, the double-axis support 6 of the arm 6 of the pedestal 4
Square holes 12 and 12 are provided at positions corresponding to a and 6a, respectively, and a slider 13 whose cross section is curved approximately in the shape of 0 is inserted into the square holes 12 and 12 from the back side of the pedestal 4. Therefore, they are fitted and arranged so as to be slidable in the vertical direction.

Upper and lower side walls 13a, 13a of the slider 13
are provided with screw holes 13b, 13b as shown in Fig. 6.
are provided and the push pins 14, 14 are screwed in from the outside to project outward symmetrically,
Both push pins 14, 14 are attached to the brackets 5, 5.
The push pins 14, 14 are fitted with the push pins 14, 14, and the push pins 13a, 13a are slidably inserted into the mounting holes 5a, 5a, so that they protrude outward by an appropriate length. Each bracket 5,
5 has the same spring constant as the compression spring 1.
5, 15 are interposed between the two springs 15, 15.
2, the slider 13 is held in the neutral position as shown in FIG.

On the other hand, each shaft support 6a, 6 in the arm 6
The outer surfaces 6b, 6b of the door 1 are each formed into a circular arc surface, and the arm 6 is placed in a non-cautious position along the inner surface of the door 1 as shown in FIG. Notches 16, 16 which are removably engaged with the slider 13 are cut out, thereby preventing the arm 6 from swinging (rotating) when the door is in the non-cautious position.

Here, the end portions 13c of the side walls 13a, 13a of the slider 13 are placed in the notches 16, 16.
13c is engaged, so when the slider 13 is formed to be thin as shown in the figure, it is preferable to bend each of the ends to the outside so as to obtain sufficient engagement strength.

The above-mentioned arm 6 has a sliding part 11 provided in a narrow elongated hole whose distal end is a closed end, and a guide part 10 provided in an enlarged hole that communicates with the base end of the sliding part 11 and is wider than that. Therefore, the engaging portion 9 of the catch seat 8 is formed of the head 9a and the neck portion 9b as described above, but the arm 6 is not limited to the above example; Of course, it may be as shown in FIG.

In other words, the arm 6 shown in FIGS. 7 and 8 has a narrow guide portion 10, a wide sliding portion 11, and a head 11a at the tip of the sliding portion 11. In order to fit the seat 8, the engaging portion 9 is formed in a groove shape with the engaging portion 9 facing sideways and opening at the front, and the opening portion 9c is provided narrowly.
Only the guide section 10 can be engaged and disengaged, and the sliding section 11 cannot be engaged and detached, and the head 11a is designed to prevent the sliding section 11 from detaching from the engaging section 9 in the longitudinal direction. It is provided to prevent this.

In the above configuration, the arm 6 is connected to the door 1.
In the non-cautious position A, in which the arm 6 is tilted down along the inner surface of the door 1, the arm 6 is held in a position along the inner surface of the door 1 by the slider 13 and the notch 16 being engaged and held. Therefore, during normal door opening/closing, even if the door 1 is opened/closed, especially if the door 1 is closed forcefully, the arm 6 will not rotate in the direction of the arrow a shown in FIGS. It is held in the non-cautious position.

When changing from the above-mentioned non-cautious position A to cautious position B,
When one of the push pins 14 is pushed in, as shown in FIG. 3, one of the springs 15 is compressed and the push pin 14
is pushed in, so the slider 13 slides in one direction, thereby causing the slider 13 to slide in one direction.
Since the engagement with the notch 16 is released, if the arm 6 is rotated in the direction of the arrow a shown in the figure in this state, it will rotate to the caution position B shown by the two-dot broken line in FIG. 5 or FIG. The arm 6 and the engaging portion 9 of the catch seat 8 can be engaged with each other.

Next, when the pushing force of the push pin 14 is released, the push pin 14 and the slider 13 are pushed inward by the restoring force of one of the compressed springs 15; is the third
Since the slider 13 is displaced as shown in the figure, the slider 13 does not engage with the notch 16, but comes into contact with the side surfaces of the shaft supports 6a, 6a of the arm 6.

Therefore, when the door 1 is opened in the direction of the arrow b in FIGS. 5 and 8 with the arm 6 in the above-mentioned caution position B,
The door is opened by the effective stroke of the arm 6, and a gap is formed between the door 1 and the jamb 2, which is sufficient for peeking outside.

After closing the door, when the arm 6 is rotated from the precaution position B in the direction of arrow c in FIG. 5 and reaches the non-care position A in FIG. Due to the restoring force of the spring 15, the slider 13 and push pins 14, 14
is pressed inward, but at this time, the slider 13 is held in the neutral position by the action of the other spring 15, so the slider 13 engages with the notch 16, and the arm 6 is in the non-cautious position. Retained.

[Effect of idea]

As explained above, since the door guard fitting according to the present invention is configured, the arm-type guard fitting has a function of preventing the arm 6 from swinging, so that the arm 6 can be moved along the inner surface of the door 1. The arm 6 can be engaged and held in the non-cautionary position A, and therefore, during normal door opening and closing, when the door is opened and closed, especially when the door 1 is closed forcefully, the arm 6 may move to the non-cautionary position B due to vibrations, etc. It is possible to eliminate problems such as when the arm 6 engages with the catch 8 due to rotation, making it impossible to enter the room, or when the arm 6 and the catch 8 collide and break. It is easy to use because the arm 6 can be released from the engagement by sliding it in either the up or down direction using the protruding push pins 14, 14. Regardless, the slider 13 has two upper and lower springs 1.
By being held in the neutral position by the arms 5 and 15, it is possible to ensure the engagement and retention of the arm 6 in the non-cautious position A, and furthermore, the arm 6 can be moved from the cautious position B to the non-cautious position A. The engagement and retention can be easily and automatically performed by simply rotating the arm 6 to the non-cautious position A, resulting in excellent usability.

[Brief explanation of the drawing]

Fig. 1 is a front view of an embodiment of the door safety fitting according to the present invention in a non-cautious state, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig. 3 is the same aspect as Fig. 2. 4 is a cross-sectional view of the arm in a state in which the steady rest is released, FIG. 4 is a vertical cross-sectional plan view taken along the line - in FIG. 1, FIG. Enlarged sectional view, No. 7
8 are a front view and a plan view, respectively, showing another embodiment of the present invention in a non-cautious state. 1...door, 4...pedestal, 6...arm, 6a...
... Pivot support, 8 ... Seat, 12, 12 ... Square hole, 1
3...Slider, 14,14...Push pin, 1
5, 15... Spring, 16... Notch.

Claims (1)

[Scope of utility model registration request] A door safety metal fitting comprising an arm 6 rotatably supported on a base 4, and a catch 8 that can be freely engaged with and disengaged from the arm only when the door is closed, and that can be slidably engaged with the arm when the door is opened. Square holes 12, 12 are provided in the vicinity of the arm bearing portion of the pedestal to allow the slider 13 to slide vertically, and push pins 14, 14 are provided symmetrically protruding outward from both the upper and lower sides of the slider. The sliders are arranged so as to protrude outward from the pedestals and are fitted together, and the sliders are held at the neutral position by interposing springs 15, 15 between the upper and lower sides of the pedestals, respectively, and the sliders are held at the neutral position. A guard metal fitting for a door, characterized in that a notch 16 is provided on one side of a shaft support 6a of the arm to engage with the slider when the arm is in a non-cautious state along the door 1.