JPH0711678U - Door open state holding device in guard arm device - Google Patents

Abstract

(57) [Summary] [Purpose] To enable the open state of the door to be easily and reliably maintained by operating the thumb turn when the guard arm is activated. A guard arm (3) having a receiving hole (31) pivotally supported by a door frame (20), a first slider (4) movably guided laterally in a lock box (1) provided in a door (10), and a first slider (4).
With respect to the engaging shaft 50, the second slider 5 is movable in the vertical direction, and the engaging portion 50a is fixed to the second slider 5.
And a spring 60 that biases the second slider 5 toward the original position.
In the guard arm device provided with the opening 13 provided in the front plate 11 of the lock box 1, the stop arm 6 pivotally attached to the first slider 4 and biased to the non-acting side by the spring 62 is provided. In the opened state of the door during operation, the thumb turn is operated via the control cam 73, and the stop piece 6 thereof is engaged with the second slider 5 in the displaced position to close the door 10.
Hold open.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for holding an open state of a door in a guard arm device.

[0002]

[Prior art]

 A guard arm device of the type proposed by the applicant as Japanese Patent Application No. 4-33375 has a base end pivotally supported by a door frame or another door of a double door, and a guard arm provided with a receiving hole on the tip side. And a first slider that is guided laterally movably into a lock box provided on the door, and is placed in either a guard arm operating position or a non-operating position by the operation of the thumb and the first slider. On the other hand, a second slider that is vertically movably guided, and an engagement portion that is fixed forward to the second slider and that has an engagement portion that selectively engages with a receiving hole of the guard arm when the guard arm operates. A shaft, a spring for urging the second slider toward the original position in the vertical direction, and an opening provided in the front plate of the lock box for escaping the engaging shaft that moves up and down together with the second slider when the guard arm acts. It is a thing.

[0003]

[Problems to be solved by the device]

 This invention proposes a device for maintaining the open state of the door, which is suitable for the guard arm device of the above-mentioned type, and does not have to manually press the door when the guard arm is activated for delivery or ventilation of mail. Also, the operation of the thumb turn makes it possible to maintain the open state of the door easily and securely.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, a device for maintaining an open state of a door in a guard arm device according to the present invention is a guard having a base end pivotally supported by a door frame or another door of a double door and a receiving hole provided at a front end side. The arm and the first slider, which is guided laterally movably in the lock box provided on the door, is placed in either the guard arm operating position or the inactive position by the operation of the thumb turn, and the first slider. On the other hand, a second slider that is vertically movably guided, and an engagement shaft that is fixed forward to the second slider and that has an engagement portion that engages selectively with a receiving hole of the guard arm when the guard arm operates. And a spring for urging the second slider toward the original position in the vertical direction, and an opening provided on the front plate of the lock box for escaping the engaging shaft that moves up and down together with the second slider when the guard arm is actuated. Guard arm equipment In the above, the stop piece pivotally attached to the first slider is urged toward the non-acting side by a spring, and one end of the stop piece moves to the original position of the second slider when the door is opened when the guard arm is activated. The second end of the stop piece is pivotally mounted in the lock box to hold the second slider in the restrained position when necessary, so that the thumb turn can be operated. It is characterized in that it can be selectively engaged with the control cam which is rotationally displaced by.

[0005]

[Action]

 As shown in FIG. 1, when the first slider is not operated, it is in the retracted position, and the engagement shaft fixed to the second slider is housed in the lock box.

In order to operate the guard arm, the first slider is advanced together with the second slider by rotating the thumb turn, for example, by 45 degrees in the closed state, and the engagement shaft on the second slider is moved to the front plate. Make it protrude through the opening and insert it into the receiving hole of the guard arm.

This state is the operating state of the guard arm. Here, when the door is opened, as shown in FIG. 6, the guard arm begins to swing, and at the same time, the engaging shaft, which is prevented from being pulled out from the receiving hole by the engaging portion, is formed together with the second slider. Move vertically (upward) against the bias. At this time, the engagement shaft moves along the opening of the front plate.

When the door is opened to the vicinity of the maximum opening angle due to restrictions such as the length of the guard arm and the length of the opening of the front plate, as shown in FIG. 7, the thumb turn is further rotated by 45 degrees, for example. Rotate and displace the control cam.

The other end of the stop piece placed in the non-acting position by the bias of the spring on the first slider engages with the rotationally displaced control cam to swing the stop piece counterclockwise in the figure. Then, one end of the second slider holds the second slider in an immovable state.

Here, the second slider, together with the engaging shaft, is prevented from returning to its original position (moving downward in FIG. 7), so that the door is held open.

In order to return the guard arm to the normal operating state or the non-operating state, the thumb turn may be operated in the opposite manner, and each member automatically returns to the predetermined position.

[0012]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1, 2 and 8, reference numeral 10 is a door, 20 is a door frame or another door of a double door, 1 is a lock box fixed to the door 10, 11 is a front plate of the lock box 1, and 12 is One side plate of the lock box 1, 13 is an opening provided in the front plate 11, 2 is a strike fixed to a door frame or another door 20, 21 is a clearance for an engagement shaft 50 described later provided in the strike 2. Holes and 22 are insertion holes of the dead bolt 8 as the final tightening, respectively.

In the strike 2 on the door frame or other door 20, as shown in FIG. 8, the base end of the guard arm 3 is pivotally supported by the pivot 32, and is attached to the tip side (free end side). Is provided with a receiving hole 31 into which an engaging shaft 50 described later is inserted.

In the lock box 1, as shown in FIGS. 1 and 5, there is provided a first slider 4 which is movably guided in the lateral direction. As shown in FIG. 3 (a), the first slider 4 in the illustrated example is a plate material having a substantially rectangular overall side surface, to which bending or notching is applied.

The first slider 4 is laterally guided by a guide means 41 that is a combination of a pin and an elongated hole, as well as by any means.

A second slider 5 is attached to the front portion of the first slider 4 so as to be movable in the vertical direction (vertical direction) with respect to the first slider 4. As shown in FIG. 3B, the second slider 5 in the illustrated example is formed by bending a vertically long plate material so that the cross section has a U shape, and a part (upper part) 53 thereof is described later. It is projected rearward for selective engagement with the stop piece 6.

The second slider 5 has a guide means 51 in which a protrusion and an elongated hole are combined, and a guide means 52 in which a bent portion of the second slider 5 and an end edge of the cutout of the first slider 4 are brought into contact with each other. Besides, it is guided in the vertical direction by any guide means.

An engaging shaft 50 having an engaging portion 50a made of a plate material at the tip is fixed to the second slider 5 toward the front, and the engaging shaft 50 has a thin sub-engagement. A shaft 50b is attached.

The engaging shaft 50 is selectively inserted into the receiving hole 31 of the guard arm 3 together with the sub-engaging shaft 50b when the second slider 5 is advanced to the guard arm operating position together with the first slider 4. To meet.

An inverted L-shaped receiving piece 91 shown in FIGS. 3C and 3D is provided between the first slider 4 and the second slider 5 having a U-shaped cross section. It is attached so that it intersects with the joint shaft 50.

A pin 92 is planted laterally in the receiving piece 91, and the pin 92 penetrates a long hole 93 provided in the second slider 5 in a longitudinal direction and doubles as a cover plate of the lock box 1. It is movably fitted in an L-shaped guide hole 94 (see FIG. 4) provided in the other side plate 14.

The tampering prevention device 9 in the guard arm operating state including the receiving piece 91 and the pin 92 is not directly related to the main part of the present invention. Its structure and operation will be described later.

Reference numeral 60 denotes a return compression spring that is provided between the first slider 4 and the second slider 5 and urges the second slider 5 toward the original position in the up-down direction (downward position). In the embodiment, it is applied to the second slider 5 via the receiving piece 91, but it can be directly attached.

At the upper portion of the first slider 4, there is provided a stop piece 6 whose central portion is pivotally attached by a horizontal shaft 61. The stop piece 6 is biased toward the non-acting side by a torsion spring 62, for example. is there .

The one end (upper end) of the stop piece 6 restrains the return of the second slider 5 to the original position (lower position) side when the door is opened when the guard arm 3 is operated. The projection portion 53 is selectively engageable.

Reference numerals 71, 72, and 73 respectively indicate a dead cam, an auxiliary cam, and a control cam pivotally mounted on the side plate 12 in the lock box 1, all of which are the indoor side thumb turn and the outdoor side into which keys are inserted. It is linked to the cylinder lock of and is rotated by the thumb turn or the key.

The dead cam 71 is linked to the dead bolt 8 arranged in parallel with the first slider 4, and the dead bolt 8 is projected and inserted from the front plate 11 for locking and unlocking like a known locking device. The dead bolt 8 projects and fits into the engagement hole 22 of the strike 2 when the dead cam 71 is rotated 90 degrees clockwise, for example, in FIG.

Reference numeral 81 is a return spring means for urging the dead bolt 8 rearward, and is composed of a V-shaped swing member and a torsion spring.

The auxiliary cam 72 moves the first slider 4 back and forth between the guard arm inoperative position and the guard arm operating position. As shown in FIG. 3A, the first slider 4 moves forward and backward. It selectively abuts on the three driven parts 42 provided in FIG.

When the auxiliary cam 72 is rotated by 45 degrees clockwise in FIG. 1 by the operation of the thumb turn, the first slider 4 advances together with the second slider 5 and the engagement shaft 50 to move the engagement shaft 50. The front plate 11 is projected through the opening 13 and the tip thereof is inserted into the receiving hole 31 of the guard arm 3. This state is the operating state of the guard arm 3.

When the door 10 is opened in the guard arm operating state, the engaging shaft 50 engaged with the tip of the guard arm 3 moves upward together with the second slider 5 as the guard arm 3 swings.

When the door 10 reaches the maximum opening angle within the regulation range of the guard arm 3 and the door 10 is desired to be held in the released state at that position, the control cam 73 is operated.

That is, when the control cam 73 is further rotated by 45 degrees clockwise, for example, by operating the thumb turn, as shown in FIG. 7, the stop piece 6 other than the stop piece 6 which is urged by the spring 62 to the non-acting position. The cam 73 engages and abuts on the end, swings the stop piece 6 counterclockwise, and engages the protruding portion 53 of the second slider 5.

When the stop piece 6 is held in the state shown in FIG. 7 while keeping the thumb turn as it is, the second slider 5 is restrained in the displacement position against the return spring 60, and the door 10 is The open state is maintained even if you release your hand.

In the illustrated embodiment, as shown in FIGS. 1, 5 and 6, a tampering prevention device 9 for activating the guard arm is attached to the guard arm device.

The illegal release preventing device 9 includes the receiving piece 91 described above, the pin 92 planted in the receiving piece 91, the longitudinal hole (vertical direction) long hole 93 of the second slider 5 into which the pin 92 is inserted, and the other side plate. In addition to the 14 L-shaped guide holes 94, a swinging piece 95 pivotally attached to the lower end front portion of the second slider 5 and a torsion spring 96 for biasing the swinging piece 95 toward the non-acting side are added. Consists of

In order to activate the guard arm 3 in a normal state (FIG. 1) with the door 10 closed, the second slider 5 is advanced together with the first slider 4 and the engagement shaft 50 is moved to the guard arm. 3 through the receiving hole 31.

In this guard arm operating state (FIG. 5), the swinging piece 95 on the second slider 5 has its tip inserted into the receiving hole 31 of the guard arm 3, but is still in a non-operating state. .

The illegal release preventing device 9 exerts an effect when the thumb turn is operated by inserting a finger through the gap after opening the door 10 for the purpose of illegal release of the guard arm.

In the case where the second slider 5 is simply movably carried by the first slider 4, when the engaging shaft 50 is pushed inward after the thumb turn is slightly rotated in the opposite direction, the first slider 4 is moved. At the same time, the second slider 5 returns to the original position side, and the operating state of the engagement shaft 50 and the guard arm 3 is released.

In the case of the unauthorized release prevention device 9 of the illustrated example, when the door 10 is slightly opened from the state of FIG. 5, the guard arm 3 swings and the tip end of the swinging piece 95 is the edge of the receiving hole 31. It is pushed by the part and turns slightly clockwise.

At this time, as shown in FIG. 6, the swing piece 95 pushes up the pin 92 by the length of the elongated hole 93 of the first slider 5, and the outer end portion of the pin 92 is guided by the guide hole 9 in the side plate 14. It goes slightly into the vertical part of 4.

Therefore, in the state of FIG. 6, since the outer end portion of the pin 92 is not located in the lateral (horizontal direction) portion of the guide hole 94, the first slider 4 cannot be retracted even by the thumb turn. After all, the engagement shaft 50 is held in the protruding state.

In the figure, reference numeral 74 indicates a known click spring means provided in close proximity to the dead cam 71, the auxiliary cam 72 and the control cam 73. Further, the notch 33 provided at the tip end side in the receiving hole 31 of the guard arm 3 shown in FIG. 8 is provided with the guard arm 3 and the sub engaging shaft 50b when the door 10 is opened at the maximum opening angle when the guard arm is operated. It is for stably maintaining the engagement relationship with the engagement shaft 50 including the.

[0045]

[Effect of device]

 According to the open state maintaining device for the door guard arm device of the present invention described above, the open state of the door can be easily and surely maintained by operating the thumb turn when the guard arm is activated. It is extremely advantageous for delivery or ventilation.

[Brief description of drawings]

FIG. 1 is a partial vertical cross-sectional side view of an embodiment of the present invention when a guard arm is inoperative.

FIG. 2 is a front view of the front plate as viewed from the front plate.

3A and 3B are views of components taken out from the embodiment of FIG. 1, where FIG. 3A is a side view of a first slider, FIG. 3B is a side view of a second slider, and FIG. , (D) is a front view of the receiving piece.

FIG. 4 is a partial side view showing a side plate (lid plate) of the lock box in the first embodiment.

FIG. 5 is a side view of a partial vertical section of the guard arm in an operating state when the door is closed.

FIG. 6 is a partial vertical sectional side view of the guard arm in an operating state when the door is slightly opened.

FIG. 7 is a partial vertical sectional side view showing an operating mode of a main part in a guard arm operating state.

FIG. 8 is a front view of a strike when the guard arm swings.

[Explanation of symbols]

 10 Door 20 Door Frame or Other Door 1 Lock Box 11 Front Plate 13 Opening 3 Guard Arm 31 Receiving Hole 4 First Slider 5 Second Slider 50 Engaging Shaft 50a Engaging Part 60 Spring 6 Stopping Piece 62 Spring 73 Control Cam

Claims (1)

[Scope of utility model registration request] 1. A guard arm having a base end pivotally supported by a door frame or another door of a double door and having a receiving hole at a tip side thereof, and a guide box movably in a lateral direction in a lock box provided on the door. A first slider that is placed at any one of a guard arm operating position and a non-operating position by operating the thumb turn, and a second slider that is vertically movable with respect to the first slider,
An engaging shaft that is fixed forward to the second slider and that has an engaging portion that selectively engages with the receiving hole of the guard arm when the guard arm operates, and biases the second slider toward the original position in the vertical direction. In a guard arm device having a spring for rotating and an opening provided in a front plate of a lock box for escaping an engaging shaft that moves up and down together with a second slider when the guard arm is actuated, a central portion is pivotally attached to the first slider. The stop piece is biased toward the non-acting side by a spring, and one end of the stop piece is selectively attached to the second slider in order to restrain the second slider from returning to its original position when the door is opened when the guard arm is operated. And the other end of the stop piece selectively engages the control cam pivotally mounted in the lock box and pivotally displaced by the operation of the thumb turn in order to hold the second slider in the restrained position when necessary. The feature is that Door in an open state holding device in the guard arm apparatus that.