JP4591121B2 - Door guard - Google Patents

Description

  The present invention relates to a door guard, and more particularly, to a door guard that can prevent a door guard from being automatically activated when going out in a door guard configured to allow a catch provided on a door frame side to appear and retract.

  The conventional door guard includes, for example, a first base 3 fixed to the indoor side of the door frame 1 or the door 2 and a first base 3 as described in Patent Document 1 described later and as shown in FIG. And a receiving base 4 having a bulging head 4a at the tip, a second base 5 fixed to the indoor side of the door 2 or door frame 1, and a base end pivotally attached to the second base 5. A swingable connecting rod 6, an insertion portion 6 a provided along the length direction of the connecting rod 6 and corresponding to the bulging head 4 a of the receiving rod 4, and a guide elongated hole 6 b continuous therewith.

  And, when the door 2 is closed, the insertion portion 6a is hidden in the bulging head 4a of the receiving rod 4 and the door 2 is opened in this state, as shown in FIG. Visitors can be confirmed safely and mail can be delivered. The same thing is disclosed in the patent document described later and is well known.

  Further, such door guards are generally quasi-stablely defined by a click device with an operating angle position of the connecting rod 6 indicated by a solid line in FIG. 2 and a standby angle position indicated by a chain line.

  The door guards described in Patent Documents 1 and 2 do not need the click device because they are not necessary, but for example, as shown in FIG. A position defining groove (hereinafter simply referred to as an operating groove) 7 and a standby angle position defining groove (hereinafter simply referred to as a standby groove) 8 having the same cross-sectional shape are engraved so as to substantially intersect with each other in a cross shape.

  Correspondingly, as shown in FIGS. 4 to 6, a substantially inverted U-shaped click recess 9 (see FIG. 5) is formed in the bearing portion 5 a of the second base, and the click recess 9 has a click body. 11 is fitted.

  The click body 11 is made of, for example, an elastic synthetic resin, and is formed by integrally connecting a pair of click claws 12 and 12 having a mountain-shaped cross section as shown in FIG. 6 to an inverted U-shaped base frame.

Needless to say, by operating the connecting rod with fingers to selectively engage the click claw 12 with the operating groove 7 or the standby groove 8, the operating angle position of the connecting rod 6 shown by a solid line in FIG. Alternatively, the standby angle position indicated by the chain line is defined metastable.
Patent gazette related to Japanese Patent No. 3451304 Japanese Patent Application No. 2004-293635

  As described above, the conventional door guard having the above-described configuration can be operated as shown in FIG. 1 when the door is opened with the connecting rod 6 in the operating angle position as shown by a solid line in FIG. As it is, the door guard is supposed to be operated by the housekeeper from the indoor side.

  On the other hand, when closing the door for going out, the door may be closed at an angular position close to the operating angle position indicated by the solid line in FIG.

  In this case, the connecting rod 6 moves downward from the position shown in FIG. 2, and the free unit interferes with the receiving rod 4.

  Actually, the surface of the connecting rod 6 on the door frame side interferes with the bulging head 4a of the receiving rod, and the wedge rod 4 occurs between them, so that the receiving rod 4 is moved to the door frame side, that is, rightward in FIG. It is pushed.

  Since the receiving rod 4 is normally fixed to the door frame (see FIG. 1), the connecting rod 6 is rotated clockwise in FIG. 2 by the reaction force of the pushing against the receiving rod 4 by the wedge action. In other words, the connecting rod 6 is brought down in the direction of the door 2.

  However, the door guards described in Patent Documents 1 and 2 are configured so as not to obstruct the passage of the door opening by immersing the non-operating receiver 4 on the door frame side. It is comprised so that it may protrude.

  Therefore, if the above-described click device is hard, the receiving rod 4 is pushed into the door frame side and closed completely, and the insertion portion 6a of the receiving rod 4 and the connecting rod 6a (see FIG. 1) as shown in FIG. When aligned, the receiving rod 4 that has been pushed by the connecting rod 6 until then and has been pushed into the storage cylinder provided on the door frame becomes free, protrudes indoors, and the door guard is activated as shown in FIG. .

  Then, even if a family member comes home and unlocks the cylinder lock, there arises a disadvantage that the door guard is locked out.

  Therefore, the present invention provides a door guard that can prevent the door guard from being automatically activated when going out, even if the receiving guard is a type of door guard that can move in and out of the door frame, thereby eliminating the above-mentioned disadvantages. The purpose is to do.

  In order to achieve the above object, the present invention includes a first base fixed to the inside of a door frame, a cradle having a bulging head at the tip, and detachably attached to the first base, and a door A second base that is fixed to the inner surface of the housing, a base that is pivotally attached to the second base so as to be swingable, and a guide that can be slidably fitted into the receiving portion and a receiving portion through which the protruding head of the receiving portion can be inserted A connecting rod in which long holes are continuously provided in the length direction, an operating groove, a standby groove, and a click body mounted on the bearing portion of the second base body, which are carved at predetermined angular intervals on the outer surface of the base end of the connecting rod. A retraction groove is engraved at an intermediate angular position between the operation groove and the standby groove, and the portion between the operation groove and the retraction groove becomes deeper as the retraction groove is closer. It is characterized by an inclined surface.

  When the door guard according to the present invention configured as described above attempts to close the door in a state where the connecting rod is accidentally raised, the click pawl of the click device at that time is on the inclined surface between the operating groove and the retracting groove. Since it is elastically contacted and this inclined surface is a concave portion in a broad sense, the connecting rod is easily tilted in a state where the so-called click is loosened.

  Therefore, when the connecting rod interferes with the receiving rod, instead of pushing the receiving rod, the click body engages with the retracting groove, and is intermediate between the operation angle position shown by the solid line and the standby angle position shown by the chain line in FIG. Since it is in the angular position, the inconvenience due to the operation of the door guard device can be completely prevented.

  In addition, since the inclined surface does not interfere with the operation groove, various effects such as no deterioration of the original function of the click device are achieved.

  A retraction groove is engraved at an intermediate angular position between the operation groove and the standby groove of the click device, and the portion between the operation groove and the retraction groove is an inclined surface that becomes deeper as it is closer to the retraction groove. By adding only the configuration, the inconvenience of the door guard that appears and disappears was completely eliminated.

Embodiments of the present invention will be described below with reference to FIGS.
7 and 8, reference numeral 13 denotes a retracting groove, and the retracting groove 13 is formed at an intermediate angular position between the operating groove 7 and the standby groove 8.

  In the illustrated embodiment, the retraction groove 13 is set to have a V-shaped opening angle slightly larger than other grooves. This is because the click claw 12 (see FIG. 6) is easily engaged.

  A sector-shaped portion (see FIG. 7) between the retracting groove 13 and the operating groove 7 forms an inclined surface 14 that becomes deeper as the retracting groove is closer.

  Note that the inclination angle of the inclined surface 14 does not need to be constant as shown in FIG. 8 and may be an inclined surface that bends in two steps or an inclined surface that changes in a curved shape.

  Further, it is desirable that there is no inclination in the radial direction at a certain angular position of the inclined surface since the height of the click claw is constant, but it may be advantageous in terms of molding.

  However, the inclined surface 14 may interfere with the retracting groove 13 (see FIG. 8), but interference with the operating groove 7 should be avoided. This is because when the door guard is operated for the original operation from the indoor side, the operating angle position of the connecting rod becomes unstable.

  On the other hand, if the inclined surface 14 is not an inclined surface and is a recess that is deeper than the stone at the boundary with the operating groove (not shown), an edge will stand at the boundary with the operating groove and the strength of the click device will be reduced. It is.

The perspective view which shows an example of the conventional door guard. The side view of the door guard of patent document 1. FIG. The side view of the conventional connection rod. The top view of a 2nd base | substrate. Sectional drawing by the VV line | wire of FIG. The expanded sectional view by the VI-VI line of FIG. The side view of the connecting rod by one Example of this invention. The diagram which expand | deploys and shows the base end outer peripheral surface of the connecting rod shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Door frame 2 Door 3 1st base | substrate 4 Receptacle 5 2nd base | substrate 6 Connection rod 7 Actuation groove 8 Waiting groove 9 Click recessed part 11 Click body 12 Click claw 13 Retraction groove 14 Inclined surface

Claims (1)

  A first base that is fixed to the door frame interior side, a ridge that has a bulging head at the tip thereof, and that can be inserted into and retracted from the first base; a second base that is fixed to the inner surface of the door; A connecting rod that is pivotally attached to the second base so that its base end is swingable, and has an insertion portion through which the bulging head of the receiving rod can be inserted and a guide elongated hole that is slidably fitted to the receiving rod in the longitudinal direction. And a click device made up of a click body mounted on the bearing portion of the second base, and an operation groove engraved on the outer surface of the base end of the connecting rod at predetermined angular intervals, a standby groove, A door guard characterized in that a retraction groove is engraved at an intermediate angular position between the groove and the standby groove, and a portion between the operation groove and the retraction groove has an inclined surface that becomes deeper as it is closer to the retraction groove.

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