JP4836109B2 - Door guard with ventilation function - Google Patents

Description

  The present invention relates to a door guard with a ventilation function (hereinafter simply referred to as a door guard), and more particularly to a door guard that has a simple structure and operates reliably.

  A 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 the door frame 1, and a base end pivotally attached to the second base 5. The connecting rod 6 includes a swingable connecting rod 6, an insertion portion 6 a provided along the length direction of the connecting rod 6, corresponding to the bulging head 4 a of the receiving rod 4, and a guide elongated hole 6 b continuous therewith.

Then, 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 is disclosed in Patent Document 2 and is well known.
Patent gazette related to Japanese Patent No. 3451304 Japanese Utility Model Publication No. 55-51956 Patent Gazette related to Japanese Patent No. 3003692

  The door guard described above has been practically used in the prior art, but as is apparent from FIG. 1, in the normal state where no external force acts on the door, the door is automatically closed by the biasing force of the door closer. For example, there is no function to keep the door slightly opened for ventilation.

  In this case, in order to keep the door open, it is necessary to perform a troublesome operation such as putting an object in the gap of the door.

  In order to eliminate this inconvenience, for example, the door guard described in Patent Document 3 incorporates a mechanism that keeps the door open.

  However, since the door guard described in Patent Document 3 assigns a stopper function to the receiving rod 4 itself, it is necessary to incorporate a function that fulfills the opposite purpose into the receiving rod and the connecting rod that should be slid freely. For this reason, there is still room for improvement, such as a complicated door guard structure.

  Accordingly, an object of the present invention is to provide a door guard with a wind function that can keep the door slightly opened when the door guard is operated, and has a simple structure.

In order to achieve the above object, the invention according to claim 1 is a first base fixed to the door frame or the indoor side of the door, and a receiving member provided on the first base and having a bulging head at the tip. A second base that is fixed to the indoor side of the door or door frame, a base end pivotably attached to the second base so that the bulging head of the receiver can be inserted, and a receiver and a slide In the case of having a connecting rod that is provided with a guide elongated hole that is movably fitted in the longitudinal direction , a right angle is maintained between the free end of the connecting rod and the free end of the connecting rod. A connecting rod in which at least one second engaging portion made of a stepped portion protrudes, and on the other hand, in the vicinity of the base portion of the receiving rod , its edge portion is parallel to the receiving rod and the insertion portion and the guide elongated hole are continuously provided. The first engagement portion that can be engaged with the second engagement portion when the door guard is operated is formed in such a manner that the first engagement portion is extended toward the opening side.

  The door guard with ventilation function according to the first aspect of the present invention configured as described above is provided with a second engagement projecting on the back surface side thereof when the free end portion of the connecting rod in operation is brought down to the first base side. The portion can be engaged with the first engaging portion formed in the vicinity of the base of the receiving rod.

  When the hand is released from the door in this state, the second engaging portion moves toward the first engaging portion due to the biasing force of the door closer, and in the state where these contact and engage with each other, the biasing force of the door closer is The door is held on the first base body through the engagement of the first and second engaging portions, and the door is kept in a slightly opened state, thus allowing ventilation.

  Since the ventilation function can be obtained by merely providing the engaging portions on the back surfaces of the free ends of the first base body and the connecting rod, the structure of the door guard with the ventilation function is simplified.

Embodiments of the present invention will be described below with reference to the drawings.
2 and 3, reference numeral 6 denotes a connecting rod. As is apparent from FIG. 2, the connecting rod 6 has, for example, an overall U-shape, and its base end (right end in FIG. 2) is the first. It is the same as that of the said patent document 1 that the 2 base | substrate 5 is pivotably attached.

  Further, the U-shaped storage groove 6c is formed by stealing the meat on the surface side of the parallel portion sandwiching the guide elongated hole 6b of the connecting rod, in other words, the inside of the side where the bulging head 4a of the receiving rod penetrates when the door guard is activated. Although the swollen head 4a of the receiving rod can be stored, the storage groove 6c is not an essential component of the present invention.

Furthermore, a pair of second engaging portions 6d and 6d are formed on the back surface side of the free end portion of the connecting rod 6 so as to protrude from the back surface of the free end portion of the connecting rod . . In the illustrated embodiment, a total of two second engaging portions are provided, but at least one second engaging portion may be provided.

  On the other hand, a receiving rod 4 is formed on the door frame 1 side via the first base 3. The receptacle 4 in the illustrated embodiment uses the type of receptacle described in the above-mentioned special reference 1 and can be projected and retracted from the first base 3.

  Therefore, the first base 3 is like a prismatic case that supports and guides the receiving rod 4 so as to be able to protrude and retract. However, the receiving base 4 in the present invention does not need a function capable of protruding and retracting from the first base 3, and therefore the first base 3 is not required. The base 3 may also be a normal seat plate shown in FIG.

The first base 3 is integrally formed with a first engaging portion 3a in such a manner that its edge extends in parallel with the receiving rod and extends to the opening side of the connecting rod provided with the insertion portion and the guide slot. Has been.

  As is apparent from FIG. 2, the first engaging portion 3a in the illustrated embodiment has substantially the same length as the width of the connecting rod 6, but the second engaging portion 6d protrudes only at one location of the connecting rod. When it is provided, it may be a small one having the same width as that of the second engaging portion.

  2 and 3, reference numeral 7 indicates a packing strip for maintaining the airtightness in the room, and in these drawings, parts denoted by the same reference numerals as those in FIG. 1 indicate parts that are equivalent to each other.

  As shown in FIG. 3, the door guard according to one embodiment of the present invention configured as described above sets the door guard so that the insertion portion 6a of the connecting rod is hidden in the bulging head portion 4a of the receiving rod. When the door is opened in the state, the door guard is activated.

  At this time, the second engaging portion 6d of the connecting rod is relatively close to the first engaging portion 3a, and the former is in the direction in which the free end portion of the rear connecting rod 6 is close to the first body 3 after exceeding the latter. When tilted down, as shown in FIG. 4, the first engaging portion 3 a becomes farther than the second engaging portion 6 d with respect to the second base 5.

  As a result, as is apparent from FIG. 4, when the hand is released from the door, the second engaging portion 6d comes close to and abuts on the first engaging portion 3a by the biasing force of the door closer, and thereafter the biasing force of the door closer Is held on the first base 3 through these engagements, and the state where the door is slightly opened is stably held.

  When the tip of the connecting rod 6 is moved slightly to the left from the state shown in FIG. 4, the first and second engaging portions are disengaged, and the door is then closed by the urging force of the door closer, resulting in the state shown in FIG. Return.

  In the embodiment shown in FIGS. 2 to 4, the first and second engaging portions 3 a and 6 d are formed in such a manner that a part of the connecting rod and the first engaging portion 3 protrudes. A short cylindrical pin may be planted at a predetermined location (not shown).

The perspective view which shows an example of the conventional door guard. The front view of the connecting rod of the door guard by one Example of this invention. In the partial cross section side view which shows one Example of the door guard of this invention, the time of door closing is shown. In the partial cross section side view which shows one Example of the door guard of this invention, the state which the door opened a little is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Door frame 2 Door 3 1st base | substrate 3a 1st engaging part 4 Receptacle 4a Swelling head 5 2nd base | substrate 6 Connection rod 6a Insertion part 6b Guide long hole 6c Storage groove 6d 2nd engaging part

Claims (1)

A first base fixed to the door frame or the indoor side of the door; a receiving base provided on the first base and having a bulging head at the tip; a second base fixed to the indoor side of the door or door frame; The base end is pivotally attached to the second base body, and an insertion portion through which the bulging head of the receptacle can be inserted and a guide elongated hole that is slidably fitted with the receptacle are provided in the length direction. In the case having a connecting rod, at least one second engaging portion made of a stepped portion that maintains a right angle between the connecting rod and the free end portion back surface is provided on the back surface side of the free end portion of the connecting rod. On the other hand, the second engagement when the door guard is activated in the manner of extending the edge of the receiving rod in the vicinity of the base of the receiving rod in parallel with the receiving rod and the opening side of the lotus knot provided with the insertion portion and the guide slot. The door guard with a ventilation function characterized by forming the 1st engaging part which can be engaged with a part.

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