JP2003206662A - Door guard and door guard device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make it possible to lock/unlock a door by a door lock operation of a door guard. <P>SOLUTION: The door guard engages with a protrusion 65 projected from a door frame 74 to the frontage and regulates the opening of the door 70 within a constant angle. When a guard arm 16 swings and separates from the indoor side 72 of the door 70, the protrusion 65 is inserted in an insertion hole 26 and the dead bolt 28 advances out of a case 2, interlocking with the swinging motion of the guard arm 16 and a thumbturn 33 turns to one direction A. When the guard arm 16 swings and accesses the indoor side face 12 of the door, the protrusion 65 is pulled off from the insertion hole 26, and the advanced dead bolt 28 retreats into the case 2 and further, the thumbturn 33 turned to one direction A rotates to the other direction B. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door guard and a door guard device which engage with a protrusion projecting from a door frame toward a frontage and regulate the opening of the door within a certain angle.

[0002]

2. Description of the Related Art Generally, a door guard is provided on a side edge of an indoor surface of a free end of a door installed in a building, and is provided on a guard arm swingable about a vertical axis and a door frame on the indoor side of the building. And a substantially mushroom-shaped arm receiving portion.

The guard arm is a long member, and a guide long hole is formed inside along the longitudinal direction thereof. On the side of the base end of the guard arm pivotally supported by the vertical shaft, the guide elongated hole is formed larger than the head of the mushroom-shaped arm receiving portion and is insertable therethrough. On the other hand, the remaining portion on the tip side of the guide elongated hole is formed narrower than the base end side so that the head portion of the arm receiving portion cannot be inserted, and the base portion of the arm receiving portion is slidably guided. It has become so. That is, when the door is closed, the arm receiving portion extends from the door frame to the door, and the head of the arm receiving portion is located in the guide elongated hole on the base end side of the guard arm.

Therefore, when the door guard is not used, the guard arm is tilted so as to be substantially horizontal with the inner surface of the door.

On the other hand, when using the door guard, the door is closed and then the guard arm is erected so as to be perpendicular to the inner surface of the door. When the door is opened, the base of the arm receiving portion is slidably guided by the elongated guide hole and abuts on the other end of the guard arm. Therefore, when the guard arm is used, the opening / closing stroke of the door becomes the length of the guide elongated hole, and the opening angle of the door can be restricted to a certain angle or less.

[0006] With this, it is possible to safely confirm the visitor, and it is possible to send and receive deliveries.

In recent years, as an auxiliary lock for one-door and two-lock, for the purpose of improving crime prevention. Guard arm locks are becoming more diverse. In the guard arm lock mechanism, normally, the dead bolt is projected in two steps to be used as a final lock, and the guard arm is locked by retracting the dead bolt from that position. That is, in the guard arm locked state, the dead bolt is protruded by one step, so that the dead bolt is applied to the rotatable guard arm provided along the strike, and the guard arm restricts the opening of the door and the door chain. It will be in the same state as it was applied. Therefore, the door can be opened a little, the door can be unlocked after confirming the visitor, and the crime prevention property can be enhanced.

[0008]

However, in general,
Since the door guard and the auxiliary lock are separately provided on the door, the indoor surface of the door is complicated. Further, if the locking / unlocking device is locked from the inside by thumb turn, the occupants often feel at ease, and the door guard tends not to engage with the door guard receiver.

Therefore, at this time, when the visitor or the delivered product is delivered, the resident may rush to unlock the locking / unlocking device, and the door guard provided at the corner cannot be effectively used. Sometimes. Also, in this case, in order to ensure safety, the door guard must be operated to engage the door guard receiver immediately before opening the door, until the visitor is confirmed and deliveries are delivered. It will take time and effort.

Further, when the door guard is used, when the resident who is indoors does not notice the return of another resident from the outside due to sleep, cooking, listening to music, etc., the resident who returns home uses the duplicate key from the outside. Although the door can be unlocked with the door, the door guard cannot be operated from the outside, which is inconvenient because the resident cannot enter the room.

Further, since the door guard is usually operated indoors, when the door guard is not used and the locking / unlocking device is illegally unlocked from the outside, the door is opened to enter the room. There is a safety problem.

Therefore, in order to solve the above problems, the present invention provides a door guard that is easy to operate and highly safe by allowing the door to be locked and unlocked at the same time by operating the guard lock of the door guard. For the purpose of one.

It is also an object of the present invention to provide a highly convenient door guard capable of selecting either a single lock state in which only the guard arm is locked or a double lock state in which the guard arm is locked and the dead bolt is locked. The second purpose.

A third object of the present invention is to provide a door guard which is safer and more convenient because it can be operated from the outside with a key combination.

It is a fourth object of the present invention to provide a door guard device having a door guard receiver that can handle both the door guard operation and the door locking / unlocking described above.

[0016]

[Means for Solving the Problems] Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments. The door guard according to claim 1 is a door guard that engages with a protrusion 65 that projects from the door frame 74 toward the front, and restricts the opening of the door 70 within a certain angle, and the free end 71 of the door 70. Side 2 is provided on the indoor surface 72, and one end 18 is pivotally supported in the direction parallel to the rotation axis of the door 70 with respect to the case 2, and the other end 23 side is swingable around the one end 18 as an axis. And the projection 6 on the end 18 side.
An insertion hole 26 through which 5 is inserted is formed, and a guide hole 25 that communicates with the insertion hole 26 and guides the projection 65 from the insertion hole 26 to the other end 23 side and in which the projection 65 cannot be removed is formed. The guard arm 16, a thumb turn 33 pivotally supported on the surface of the case 2, and the case 2
A dead bolt 28 that is provided inside and is interlockingly connected to the thumb turn 33, and rotates the thumb turn 33 to move back and forth from the case 2 to the door frame 74 side to lock and unlock the door 70; The guard arm 1
6 and the deadbolt 28, the conversion means 36 converting the swing of the guard arm 16 into the forward / backward movement of the deadbolt 28 and the rotation of the thumb turn 33. When the guard arm 16 swings and separates from the indoor surface 72 side of the door 70, the projection 65 is inserted into the insertion hole 26, and the dead bolt 2 is interlocked with the swing of the guard arm 16.
8 moves out of the case 2, the thumb turn 33 rotates in one direction A, and the guard arm 16 swings to approach the indoor surface 72 side of the door. The thumb turn 33 is removed from the insertion hole 26, and in conjunction with the swing of the guard arm 16, the advanced dead bolt 28 retracts into the case 2 and rotates in the one direction A. Is rotated in the other direction B.

According to the door guard of the first aspect, when the door is closed, the protrusion 65 extends to the door 70 side. Then, when the guard arm 16 is separated from the indoor surface 72 side of the door 70, the projection 65 is inserted into the insertion hole 26, and the dead bolt 28 advances and is inserted into the door frame 74 side. As a result, the door 70 is locked by the guard arm 16 and locked by the dead bolt 28,
It is possible to improve safety.

When the guard arm 16 is swung, the protrusion 65 is inserted into and removed from the insertion hole 26 and the dead bolt 28 is advanced and retracted. This makes it possible to perform the guard locking or unlocking operation of the guard arm 16 and the locking / unlocking operation by the dead bolt 28 at the same time with a single swinging operation by the guard arm 16, thus improving the operability.

Further, when the guard arm 16 is separated from the indoor surface 72 side of the door 70, the protrusion 65 is inserted into the insertion hole 26, the dead bolt 28 advances and is inserted into the door frame 74 side, and the thumb turn 33 also. It rotates in one direction A interlockingly. As a result, when the dead bolt 28 is to be locked, the guard arm 16 is inevitably locked by the guard arm 16, and it is possible to prevent forgetting to perform the guard lock operation.

Also, from the guard lock state and the dead bolt locked state, the thumb turn 33 is rotated in the other direction B to return it to the original position, whereby the dead bolt 28 is retracted, and the dead bolt 28 is returned to the case 2. It is stored inside and unlocked. At this time, since the rotation from the thumb turn 33 is not interlocked with the swing of the guard arm 16, the protrusion 65 maintains the state of being inserted into the insertion hole 26 of the guard arm 16, that is, the guard locked state. This makes it possible to change from the guard locked state and dead bolt locked state to the guard locked state and dead bolt unlocked state.

Therefore, in the guard locked state and the dead bolt unlocked state, when the door is opened, the projection 65 is guided by the guide hole 25 and abuts against the other end 23 of the guard arm 16, so that the door 70 is opened at a constant angle. Regulated within.

Further, when the dead bolt 28 is locked again in the guard lock state and the dead bolt unlock state, the dead bolt 28 is moved from the case 2 by rotating the thumb turn 33 in one direction A. It advances and is locked. At this time, since the rotation from the thumb turn 33 is not interlocked with the swing of the guard arm 16, the protrusion 65
Maintains the state of being inserted into the insertion hole 26 of the guard arm 16, that is, the guard locked state. As a result, the dead bolt 28 can be locked by retreating the dead bolt 28 only by rotating the thumb turn 33, and the guard bolt can be locked and the dead bolt can be locked.

A door guard according to a second aspect of the present invention is the door guard according to the first aspect, wherein an outer cylinder 58 is connected to the converting means 36 in the door 70, and an inner cylinder 57 is inserted coaxially with the outer cylinder 58. And a cylinder lock 56 in which the inner cylinder 57 rotates with respect to the outer cylinder 58 when the compound key 59 is inserted into the inner cylinder 57.
The rotation of the inner cylinder 57 is converted into the movement of the dead bolt 28 in the forward / backward direction and the swing of the guard arm 16. When the inner cylinder 57 rotates in the one direction A,
The dead bolt 28 moves out of the case 2, and the swinging of the guard arm 16 causes the dead bolt 28 to move away from the indoor surface 72 side of the door 70 and the projection 6 into the insertion hole 26.
When 5 is inserted and the inner cylinder 57 is rotated in the other direction B, the dead bolt 28 retracts to the case 2, and the guard arm 16 swings to the indoor surface 72 side of the door 70. It is characterized in that the projection 65 is pulled out from the insertion hole 26 in close proximity.

According to the door guard of claim 2, when the inner cylinder 57 is rotated in one direction A by the duplicate key 59 from the outside,
It is guard-locked by the guard arm 16 and locked by the dead bolt 28. Further, when the inner cylinder 57 is rotated in the other direction B by the duplicate key 59 from the outdoors in the guard lock state and the dead bolt locked state, the guard lock of the guard arm 16 is released and the dead bolt 28 unlocks. Will be done. As a result, the guard lock or release of the guard arm 16 and the dead bolt 2
The lock / unlock by 8 can be simultaneously operated by a single operation of the cylinder lock 56. This also enables the guard locking or unlocking of the guard arm 16 from outside.

Similarly, also in the guard lock state and the dead bolt unlocked state, after closing the door 70, the inner cylinder 57 is rotated in the other direction B by the duplicate key 59 to retract the dead bolt 28. As a result, the guard lock of the guard arm 16 can be unlocked from outside.

A door guard device according to a third aspect of the invention is provided on the door guard 1 according to the first or second aspect of the invention, and is provided on the door frame 74 so as to face the door guard 1, and the projection 65 and the dead bolt 28 penetrate therethrough. A door guard receiver 61 having a strike plate 62 in which a through hole 63 is formed,
It is characterized by including.

According to the door guard device of the third aspect, in addition to the door guard of the first aspect or the second aspect, the dead bolt 28 can be inserted and withdrawn and the guard arm 16 can be engaged and disengaged by a single door guard receiving member, and the door frame It is possible to save space in 74 and reduce the number of parts.

[0028]

1 shows a door guard 1 according to the present invention.
And an exterior view showing an embodiment of a door guard device comprising a door guard receiver 61, FIG. 2 is an exterior view of the door guard 1,
FIG. 3 is an exploded perspective view of the door guard 1.

The door guard 1 engages with a projection 65 projecting from the door frame 74 toward the frontage to regulate the opening angle of the door 70 within a certain angle. As shown in FIG.
It is fixed to the free end 71 side of the indoor surface 72 of the door 70.
A door guard receiver 61 is fixedly installed on the door frame 74 so as to face the door guard 1.

The door guard 1 is substantially composed of a case 2, a guard arm 16, a dead bolt 28, a thumb turn 33, a converting means 36, and a cylinder lock 56.

The case 2 is a member that is slightly elongated in the widthwise direction of the door 70, and is composed of a substantially rectangular box-shaped case body 3 and a sealing plate 8 for sealing the opening of the case body 3. An advancing / retreating hole 4a for advancing / retreating the dead bolt 28 is formed on one side surface 4 (left side surface) in the longitudinal direction of the case body 3. The surface 5 of the case body 3, which is the surface of the case 2, has one side surface 4
The left half portion 5a on the side projects to the front. A through hole 5c is formed in the right half portion 5b of the surface 5 of the case body 3, and one end 34 of the thumb turn 33 is pivotally supported. Screw holes 6 a and 6 b are formed on the upper surface 6 of the case body 3.

The sealing plate 8 is formed in a substantially U shape,
The flat plate portion 9 comes into surface contact with the indoor surface 72 of the door 70, and is fixed to the free end 71 side of the indoor surface 72 of the door 70 with the screw 10. Both bent pieces 11 and 12 of the sealing plate 8 overlap the upper and lower inner walls of the case body 3. Further, the upper bent piece 11 is formed with screw holes 13a and 13b so as to communicate with the screw holes 6a and 6b of the upper surface 6 of the case body 3, and the screws 14 and 14 are screwed thereto. As a result, the case body 3 is fixed to the sealing plate 8.

The guard arm 16 has a long and substantially U-shape. The open edge portion that serves as one end 18 in the longitudinal direction of the guard arm 16 includes a pair of tip pieces 19a and 19b, and a pair of shaft portions 20a coaxially provided on opposite inner side surfaces of the tip pieces 19a and 19b, respectively. 20b and each shaft portion 20
a pair of discs 21a, 21b whose centers coincide with a, 20b
It consists of and. Further, an eccentric pin 22 which is eccentric from the shaft portion 20a is vertically provided on the plate surface of the upper disc 21a.

That is, the shafts 20a, 20b and the discs 21a, 21b are inserted through the pair of notch grooves 15, 15 formed in the sealing plate 8 of the case 2 to form the discs 21a, 21b.
The inner plate surface of 21b and the surfaces of the bending pieces 11 and 12 face each other,
Shafts 20a, 20 extending outward from the bending pieces 11, 12
By inserting b into the notch groove 6c formed in the case body 3, a direction parallel to the rotation axis of the door 70, that is,
The guard arm 16 is axially supported in the width direction.

The U-shaped curved portion which is the other end 23 in the longitudinal direction of the guard arm 16 is swingable about its axis with the one end 18 of the guard arm 16 as an axis. , Close to and away from the indoor surface 72 of the door 70. That is, the guard arm 16 is substantially parallel to the indoor surface 72 in the close state, and the guard arm 16 is orthogonal to the indoor surface 72 in the separated state.

The one end 18 side of the guard arm 16 is
The tip pieces 19a and 19b are widened to have a widened portion, and the other end 23 side of the guard arm 16 is a narrowed portion narrower than the widened portion. Then, with the case 2 attached,
The widened portion on the one end 18 side of the guard arm 16 has the protrusion 6
5 is an insertion hole 26 through which the guard arm 1 is inserted.
The narrow portion on the side of the other end 23 of 6 is a guide hole 25, which is an elongated hole 24 elongated in the longitudinal direction of the guard arm 16.
Further, the guide hole 25 is configured such that the protrusion 65 is guided so as not to be removed.

The thumb turn 33 has an elongated shape narrower than the width of the guide hole 25, and is located on the right half portion 5 of the surface 5 of the case body 3.
b. One end 34 of the thumb turn 33 is pivotally supported on a base shaft 51 described later, and the other end 35 is rotatable. The thumb turn 33 is the guard arm 1
When 6 is tilted to the indoor surface 72 of the door 70 and comes close to it, the guide hole 25 is fitted into the guide hole 25.

The dead bolt 28 is provided in the case 2. The dead bolt 28 is a member that is long in the longitudinal direction of the case 2, and is slid in the case 2 in a substantially horizontal direction.
One end 29 of the case main body 3 can be moved forward and backward through the forward and backward movement hole 4a. The other end 30 of the dead bolt 28 is formed with a U-shaped groove 31. Further, an engaging hole 32 with which an eccentric shaft 52, which will be described later, is engaged is formed on the upper rear surface of the other end 30.

That is, the thumb turn 33 and the dead bolt 28 are interlocked and coupled via a turning member 50 described later, and when the thumb turn 33 turns in one direction A, the dead bolt 28 moves out of the case 2. , The other direction B
When turned to, the dead bolt 28 retracts into the case 2.

The converting means 36 is provided in the case 2. The conversion means 36 is substantially composed of a slide plate 38 connected to the guard arm 16, a rotating member 50, and a connecting member 43 connected between the slide plate 38 and the rotating member 50.

The slide plate 38 converts the swing of the guard arm 16 into a linear movement of the case 2 in the longitudinal direction. The slide plate 38 is elongated in the longitudinal direction of the case 2, and an elongated hole 39 is formed in the middle thereof. The slide pin 10 provided on the flat plate portion 9 of the sealing plate 8 has the elongated hole 39. And is slidable in the longitudinal direction.

An engaging plate portion 41 which is perpendicular to the plate surface of the slide plate 38 is formed at the upper edge of the slide plate 38 at one end side in the longitudinal direction. An engaging groove 41 a is formed in the engaging plate portion 41, and one end 18 of the guard arm 16 is formed.
The eccentric pin 22 of is engaged. Further, a connecting groove 42 for connecting to the connecting member 43 is formed on the plate surface of the slide plate 38 on the other end side in the longitudinal direction.

Therefore, from the state where the guard arm 16 is close to the indoor surface 72 of the door 70,
When the eccentric pin 22 is swung away from the indoor surface 72 of the door 70, the eccentric pin 22 is also swung in the same direction with this swing. Since the slide plate 38 is engaged with the eccentric pin 22 by the engaging groove 41a, the case body 3 is interlocked with the rotation of the eccentric pin 22.
Slide to the side 4 side.

When the guard arm 16 is separated from the indoor surface 72 of the door 70 and the guard arm 16 is swung to incline toward the indoor surface 72 side of the door 70,
The eccentric pin 22 also rotates in the same direction with this swing. Since the slide plate 38 is engaged with the eccentric pin 22 by the engaging groove 41a, it interlocks with the rotation of the eccentric pin 22 and slides to the other side surface 5 side of the case body 3.

The connecting member 43 has a connecting shaft 44 whose axis is in the thickness direction of the door 70. A connecting piece 45 is provided at one end of the connecting shaft 44 on the sealing plate 8 side. Connecting piece 45
Is connected to the cylinder lock 56 side by penetrating a through hole 9 a formed through the flat plate portion 9 of the sealing plate 8.

On the peripheral surface of the connecting shaft 44, a connecting pin 46 is provided eccentrically from the axis of the connecting shaft 44. Connecting pin 4
6 is fitted in the connecting groove 42 of the slide plate 38.
Therefore, when the slide plate 38 slides in the longitudinal direction of the case 2, by rotating the connecting pin 46 around the connecting shaft 44, the connecting shaft 44 rotates around the shaft.

The other end of the connecting shaft 44 on the side of the rotating member 50 has a large diameter, and the end face 47 thereof has a darma hole 48.
Is formed, and is connected to the side of the rotating member 50.

The rotating member 50 has a base shaft 51 whose axis is in the thickness direction of the door 70, an eccentric shaft 52 which is eccentrically provided from the base shaft 51, and a rotating plate 53 which connects the base shaft 51 and the eccentric shaft 52. It consists of and. The base shaft 51 is arranged coaxially with the connecting shaft 44, and the rotating member 50 is adapted to rotate around the base shaft 51.

A free insertion piece 54 is provided at one end of the base shaft 51 so as to be loosely inserted into the daruma hole 48 of the connecting member 43.
It is extended coaxially with. The plate surface direction of the loose insertion piece 54 is
It is orthogonal to the parallel direction of the base shaft 51 and the eccentric shaft 52. The free insertion piece 54 is configured such that its side edges facing each other in the direction of the base axis 51 come into contact with the inner wall 49 of the dharma hole 48 in the play width direction. As a result, the rotation range of the loose insertion piece 54 is set to the dharma hole 4
When the play width is within 8, the rotations are not transmitted between the connecting shaft 44 and the base shaft 51.

On the other hand, the rotation range of the free insertion piece 54 is within the dharma hole 4
When the play width of 8 is exceeded, the opposite side edges of the loose insertion piece 54 in the direction of the base shaft 51 come into contact with the inner wall 49 of the daruma hole 48, so that either one of the connecting shaft 44 and the base shaft 51 has the other. The rotation is transmitted coaxially, and the rotation is transmitted between the connecting shaft 44 and the base shaft 51.

The other end of the base shaft 51 penetrates the through hole 5c from the back surface of the case body 3 through the U-shaped groove 31 of the dead bolt 28 and is connected to the one end 34 of the thumb turn 33 so as not to rotate relative to each other.

The eccentric shaft 52 is adapted to engage with the engagement hole 32 of the dead bolt 28. In the engaged state of FIG. 3, the dead bolt 28 is retracted into the case 2 as shown in FIG. The door 70 is unlocked. Then, when the base shaft 51 rotates, the eccentric shaft 52 rotates around the base shaft 51 in the same direction as the base shaft 51, and the rotation locus becomes a locus in which an arc is drawn above the base shaft 51. Therefore, the dead bolt 28 moves back and forth in the longitudinal direction of the case 2, in other words, in the same direction as the sliding direction of the slide plate 38.

The cylinder lock 56 is inserted into a through hole 73 bored in the door 70, and is provided coaxially with the base shaft 51, the connecting shaft 44, and one end 34 which serves as a rotation shaft of the thumb turn 33. The cylinder lock 56 has an outer cylinder 58 and an inner cylinder 57 that is inserted coaxially with the outer cylinder 58. The tip of the cylinder lock 56 is exposed from the outdoor surface of the door 70, and its inner cylinder 57
A key hole is formed on the front end surface of the, and the duplicate key 59 can be inserted therethrough. In the cylinder lock 56, the engagement between the inner cylinder 57 and the outer cylinder 58 is released by inserting the composite key 59, and when the composite key 59 is rotated, the inner cylinder 57 rotates with respect to the outer cylinder 58 accordingly. .

A flange 58a is formed on the rear end of the outer cylinder of the cylinder lock 56. The fixing plate 60 has a rectangular shape and has a through hole 60a. When the fixing plate 60 is inserted into the cylinder lock 56, the fixing plate 60 and the flat plate portion 9 of the sealing plate 8 hold the flange 58a and are screwed by the screw 60b to seal the cylinder lock 56. It is fixed to the stop plate 8. On the rear end surface of the inner cylinder 57 of the cylinder lock 56, the connecting shaft 4
4 is connected, and by this connection, the inner cylinder 57 of the cylinder lock 56 cannot rotate relative to the connecting shaft 44, and the connecting shaft 44 rotates in the same direction as the inner cylinder 57 rotates. Move.

Next, the door guard receiver 61 will be described. As shown in FIG. 1, the door guard receiver 61 is fixed to the door frame 74 so as to face the door guard 1, and the strike plate 6 is provided.
2 and a substantially mushroom-shaped protrusion 65.

The strike plate 62 is a flat plate-like member and has a through hole 63 into which the dead bolt 28 is fitted. Further, the strike plate 62 is formed with a bulging plate portion 64 bulging from one side thereof.
A projection 65 is provided from the plate surface of No. 4 toward the door guard 1.

The protrusion 65 has a substantially spherical protrusion head 66, and a rod portion 68 connecting the protrusion head 66 and the plate surface of the bulging plate portion 64.
It consists of and. The protrusion head 66 is arranged close to the left half surface of the case 2, and
When is separated from the indoor surface 72 side of the door 70, it is inserted into the insertion hole 26 of the guard arm 16. The diameter of the projection head portion 66 is formed larger than the width of the guide hole 25. The rod 68 has a substantially columnar shape, and its axial diameter is smaller than the width of the guide hole 25.

Next, the operation of this embodiment will be described. In the initial state, as shown in FIGS. 2 and 4, the door is fully closed. The guard arm 16 is close to the indoor surface 72 of the door 70, and the thumb turn 3 is inserted into the guide hole 25.
3 is inserted. Further, the protrusion head 66 is close to the left half of the surface of the case body 3, and the dead bolt 28 is retracted and stored in the case 2. Furthermore, as shown in FIG. 5, the eccentric shaft 52 of the rotating member 50 is located at an upper right angle of about 45 degrees from the longitudinal direction of the case 2 with respect to the base shaft 51.

First, the operation from the indoor side will be described. From the state shown in FIGS. 4 and 5, when the guard arm 16 is pulled close to the indoor surface 72 of the door 70 toward the front side, one end 18 of the guard arm 16 swings about the axis,
The guard arm 16 is separated from the indoor surface 72 of the door 70.
At this time, one end 1 of the guard arm 16
The eccentric pin 22 of 8 rotates, and in conjunction with this, the slide plate 38 slides toward the free end 71 side of the door 70.

With this sliding, the connecting pin 46 rotates toward the free end 71 side, and the connecting shaft 44 rotates in one direction A. As shown in FIG. 5 (a), the connecting shaft 44 pushes the opposite side edges of the free insertion piece 54 with the inner wall 49 of the dharma hole 48 to move the free insertion piece 54 around the connection shaft 44 in one direction. It is rotated to A, and this rotation is transmitted to the rotation member 50.

The rotating member 50 rotates in the one direction A around the base shaft 51 in conjunction with the rotation of the connecting shaft 44. In conjunction with this, the eccentric shaft 52 rotates around the base shaft 51 in one direction A, and as shown in FIG.
It is located approximately 45 degrees to the upper left from the longitudinal direction. This eccentric shaft 5
6 and 7 (b), the dead bolt 28 engaging with the eccentric shaft 52 advances from the inside of the case 2 toward the door frame 74 side and is fitted into the strike plate 62 to be fitted into the strike plate 62 by the rotation of 2. It fits in the engagement groove of the frame 74.

Further, as shown in FIG.
Is rotated in one direction A around the base shaft 51 in association with the rotation of the base shaft 51, and is positioned in the rotation axis direction of the door 70 orthogonal to the longitudinal direction of the case 2 from the longitudinal direction of the case 2.

Thus, the guard lock by the guard arm 16 and the lock by the dead bolt 28 can be simultaneously performed by a single operation of pulling the guard arm 16 toward the front side and separating it from the indoor surface 72 of the door 70. It will be possible.

Further, as shown in FIG. 8, in this guard lock state and in the dead bolt locked state, the thumb turn 33 is rotated from indoors about the base shaft 51 in the other direction B opposite to the one direction A. And then return to the original state,
The rotating member 50 rotates about the base shaft 51 in the same direction as the thumb turn 33 in association with the rotation of the thumb turn 33. This rotation causes the dead bolt 28 to move through the eccentric shaft 52 to the door frame 74.
Is retracted from the through hole 73, is housed in the case 2, and is unlocked.

Although the free insertion piece 54 is also rotated in the same direction by the rotation of the base shaft 51, the rotation range thereof is within the play width of the darma hole 48 of the connecting shaft 44, and therefore, the rotation member 50. The rotation of the side is not transmitted to the connecting member 43 side. Therefore, the guard arm 16 maintains the locked state in which it is separated from the indoor surface 72 of the door 70.

When the door is opened with the guard arm 16 in the guard locked state, the rod portion 68 of the protrusion 65 is guided to the guide hole 25 of the guard arm 16. Since the diameter of the projection head portion 66 is larger than the width of the guide hole 25, it cannot be removed when the rod portion 68 is guided by the guide hole 25. When the rod 68 contacts the inside of the other end 23 of the guard arm 16, the opening of the door 70 is restricted within a predetermined angle.

As a result, the guard arm 16 can be in the guard locked state and the dead bolt unlocked state, and the door can be opened within the range of the stroke of the guide hole 25.

In the guard lock state shown in FIG. 8 and the dead bolt unlocked state, the dead bolt 28 is advanced and the double lock state shown in FIGS. It is possible only by rotating in the direction A.

Further, from the guard locked state shown in FIG. 8 and dead bolt unlocked state, or the guard locked state shown in FIGS. 6 and 7 and dead bolt locked state, the door 70 is opened.
When the door is fully opened, the slide plate 38 slides in the rotation axis direction of the door 70 by tilting the guard arm 16 toward the indoor surface 72 side of the door 70 and bringing them closer to each other as shown in FIGS. 4 and 5. As a result, the connecting shaft 44 rotates in the other direction B in conjunction with this. Then, the inner wall 49 of the dharma hole 48
Comes into contact with the opposite side edge portions of the loose insertion piece 54 and the loose insertion piece 5
4 is rotated in the same direction as the connecting shaft 44. In conjunction with this rotation, the rotating member 50 rotates in the same direction and the dead bolt 28
Is retracted and stored in the case 2.

Thus, the guard lock is released by the guard arm 16 only by swinging the guard arm 16.
Alternatively, the guard lock can be released and the dead bolt can be unlocked, and the operability from the indoor side can be improved.

Next, the operation from the outdoor side will be described.
In the initial state shown in FIGS. 4 and 5, when the compound key 59 is inserted from the outdoor side into the cylinder lock 56 and rotated in the one direction A, the inner cylinder 57 rotates and the end surface of the inner cylinder 57 is relatively non-rotatably connected. The connected connecting member 43 rotates around the connecting shaft 44 in the same direction as the inner cylinder 57. Along with this rotation, the connecting pin 46 rotates in the same direction, slides the slide plate 38 toward the free end 71 side, and rotates the eccentric pin 22 at one end of the guard arm 16. In conjunction with this rotation, the guard arm 16 swings and separates from the indoor surface 72 of the door 70.
Further, as shown in FIG. 7, the protrusion 65 is inserted into the insertion hole 26 and is in a locked state.

Further, the rotation of the connecting member 43 in one direction A is transmitted to the rotating member 50 side, as in the case where the guard arm 16 is pulled from the indoor side to separate it from the indoor surface 72 of the door 70. Deadbolt 28 advances from inside Case 2,
The strike plate 62 and the through hole 73 of the door frame 74 are fitted and locked. As a result, from the outdoor side, the guard arm 1
The guard lock by 6 and the lock by the dead bolt 28 are possible.

In addition, whether the door guard 1 is in the guard lock state shown in FIG. 8 and the dead bolt unlocked state, or in the guard lock state shown in FIG. 6 and FIG. By inserting the duplicate key 59 into the cylinder lock 56 and rotating the inner cylinder 57, the connecting member 43 that is connected to the end surface of the inner cylinder 57 in a relatively non-rotatable manner.
Rotates in the other direction B around the connecting shaft 44. With this rotation, the connecting pin 46 rotates in the same direction, and the slide plate 3
8 to the side of the rotation axis of the door 70 to move the guard arm 16
The eccentric pin 22 at one end is rotated. In conjunction with this rotation, the guard arm 16 swings, tilts toward the indoor surface 72 of the door 70, and approaches, and as shown in FIGS. 4 and 5, the projection 65 is pulled out from the insertion hole 26 and guarded. The guard lock of the arm 16 is released.

When the guard lock is released, the pivoting of the connecting member 43 in the other direction B is performed by the guard arm 16
Is transmitted to the rotating member 50 side as in the case of tilting the door to bring it closer to the indoor surface 72 of the door 70. Due to this transmission, the dead bolt 28 retracts into the case 2, and as shown in FIGS. 4 and 5, the strike plate 62 and the through hole 7 of the door frame 74.
Removed from 3 and unlocked. This enables the unlocking operation of the dead bolt 28 from the outdoor side as well.

Although the door guard 1 is provided with the cylinder lock 56 in the above-described embodiments, the cylinder lock 56 may not be provided. As a result, it is possible to prevent unauthorized unlocking from outside. If the cylinder lock 56 is not provided, it can be easily attached to the indoor surface 72 and the existing door 7
0 can be easily installed, and crime prevention can be improved.

[0076]

As described above, according to the present invention, it is possible to simultaneously perform guard locking or unlocking of the guard arm and locking / unlocking of the dead bolt by only swinging the guard arm. The operability can be improved. Also, the guard arm is guard locked, and
When the dead bolt is locked, along with the locking of this lock,
Since the lock has three stages, it is possible to further improve safety.

Further, in the guard lock state and the dead bolt locked state, by rotating the thumb turn from the inside of the room, only the locking / unlocking can be performed by advancing and retracting the dead bolt without releasing the guard arm. As a result, it is possible to select between the guard locked state and the dead bolt unlocked state and the guard locked state and the dead bolt locked state as needed, and it is possible to diversify the crime prevention variations.

Further, when the guard lock and the dead bolt are locked, since the rocking operation is performed by the guard arm, the guard arm is inevitably locked and the dead bolt is unlocked later. However, the guard lock will not be released. Therefore, it is possible to prevent forgetting to perform the guard lock and improve safety.

Further, by providing the cylinder lock, even when the person who can operate the door guard goes out indoors and the like, the lock can be double-locked from the outside by using the duplicate key. As a result, it is possible to safely go out and improve the safety.

Further, in the guard lock state and dead bolt unlocked state, or in the guard lock state and dead bolt locked state, there is no one who can operate the door guard indoors, or an indoor resident is an outdoor resident. Even if you do not notice that you have returned home, you can unlock the guard lock and unlock the dead bolts from the outside with a duplicate key, and the resident who returned home can enter the room indoors without being kept waiting outdoors, which is convenient. It is possible to improve.

Further, by adopting the door guard receiver provided with the projection and the strike plate, it is possible to insert and remove the dead bolt and engage and disengage the guard arm, thereby saving space in the door frame and reducing the number of parts. You can

[Brief description of drawings]

FIG. 1 is a perspective view to which a door guard device according to the present invention is applied.

FIG. 2 is a perspective view of a door guard according to the present invention.

FIG. 3 is an exploded perspective view of a door guard according to the present invention.

FIG. 4 is a partial plan sectional view of the door guard device according to the present invention in an initial state.

FIG. 5A is a diagram showing a positional relationship between a thumb turn and a rotating member in an initial state of the door guard according to the present invention. (B) It is a front view in the initial state of the door guard according to the present invention.

FIG. 6 is a partial plan sectional view of the door guard device according to the present invention in a guard lock state and a dead bolt locked state.

FIG. 7 (a) is a diagram showing a positional relationship between the thumb turn and the rotating member in the guard lock state and the dead bolt locked state of the door guard according to the present invention. (B) A front view of the door guard according to the present invention in a guard locked state and a dead bolt locked state.

FIG. 8A is a diagram showing a positional relationship between the thumb turn and the rotating member in the guard lock state and the dead bolt unlocked state of the door guard according to the present invention. (B) A front view of the door guard according to the present invention in a guard locked state and a dead bolt unlocked state.

[Explanation of symbols]

1 ... Door guard 2 ... Case 16 ... Guard arm 18 ... One end of guard arm 23 ... The other end of the guard arm 25 ... Guide hole 26 ... Insertion hole 28 ... Deadbolt 33 ... Samturn 36 ... Conversion means 56 ... Cylinder lock 57 ... Inner cylinder 58 ... Outer cylinder 59 ... key 61 ... Door guard receiver 62 ... strike plate 63 ... through hole 65 ... Protrusion 70 ... Door 71 ... Free end of door 72 ... Indoor surface 74 ... Door frame A ... one direction B ... the other direction

Claims (3)

[Claims] 1. A door guard that engages a protrusion projecting from a door frame toward a frontage and restricts opening of the door within a certain angle, the case being provided on an indoor surface on the free end side of the door. And one end of which is pivotally supported in a direction parallel to the rotation axis of the door with respect to the case, and the other end of which is swingable about the one end about the axis,
An insertion hole through which the protrusion is inserted is formed on the one end side,
A guard arm communicating with the insertion hole, guiding the protrusion from the insertion hole to the other end side, and having a guide hole in which the protrusion cannot be removed, and a pivot arm rotatably supported on the surface of the case. A thumb turn, a dead bolt provided in the case, interlockingly connected to the thumb turn, and moved forward and backward from the case to the door frame side by the rotation of the thumb turn to lock and unlock the door; and in the case, A conversion unit that is provided to be connected to the guard arm and the dead bolt and that converts the swing of the guard arm into the movement of the dead bolt in the advancing / retracting direction. When separated from the indoor surface side, the protrusion is inserted into the insertion hole,
The dead bolt advances from the inside of the case in conjunction with the swing of the guard arm, and the thumb turn rotates in one direction, and the guard arm swings to the indoor surface side of the door. When approaching, the protrusion is removed from the insertion hole,
A door guard, wherein the advanced dead bolt retracts into the case and the thumb turn that rotates in one direction rotates in the other direction in conjunction with the swing of the guard arm. 2. The door has an outer cylinder connected to the converting means in the door, and an inner cylinder inserted coaxially with the outer cylinder, and when a duplicate key is inserted into the inner cylinder, the outer cylinder is inserted into the outer cylinder. The inner cylinder includes a cylinder lock that rotates, and the conversion means further converts the rotation of the inner cylinder into movement of the dead bolt in the forward / backward direction and swing of the guard arm. When the cylinder rotates in the one direction, the dead bolt advances from the case, and the swing of the guard arm causes the dead bolt to separate from the indoor surface side of the door, and the protrusion is inserted into the insertion hole, When the inner cylinder rotates in the other direction, the dead bolt retracts into the case, and the swing of the guard arm causes the projection to be pulled out from the insertion hole in proximity to the indoor surface side of the door. Claim 1 characterized in that The door guard of the loading. 3. The door guard according to claim 1 or 2, and a strike plate that is provided on the door frame so as to face the door guard, and that has the protrusion and a through hole through which the dead bolt penetrates. A door guard receiver having the same.