JP2606662Y2 - Guard arm lock - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guard arm lock in which the opening angle of a door is limited so that a visitor can be confirmed or a mail can be transferred through a small gap.

[0002]

BACKGROUND OF THE INVENTION The present applicant has previously filed Japanese Utility Model Application No. Hei.
A new guard arm lock was proposed.

[0003] This guard arm lock is of a type in which the guard arm is housed in the free side edge portion of the door when not in operation, and the guard arm is projected to the dust portion between the door frame and when in operation. A rotating shaft fixed rearward at the base end of the guard arm is rotatably supported on a movable bearing block in the lock box. When the guard arm device is operated, the bearing block, the rotating shaft and the guard arm are moved. As a single unit, it projects forward by the elasticity of the control member.

[0004] The guard arm lock, of course, operates smoothly and achieves the intended purpose of the present invention. However, according to the invention described in claim 1 of the earlier application of the present applicant. Due to the structure of the guard arm lock, even if the guard arm device is operated and the opening angle of the door is limited, a human body cannot be inserted but a hand can be inserted.

[0005] Therefore, when the guard arm device is activated, a malicious third party can insert a hand or tool into the room through the gap in the door and operate the thumb turn to release the guard arm device, thereby allowing entry into the room. Inconvenience.

Normally, when the opening angle of the door is large, the guard arm device is not released because the flange of the engaging projection at the free end of the guard arm is caught in the guide hole of the strike. When the opening angle of the door is small, the engaging projection is located near the large-diameter receiving hole connected to the guide hole, so that the above-described illegal guard arm device can be released.

[0007] In order to solve the above-mentioned inconvenience, the guard arm lock according to the present invention described in claim 3 of the applicant's earlier application fixes the bearing block when the guard arm device is operated, and the guard arm locks. Disables unauthorized release of the device.

However, in this case, the swing of the rotating shaft accompanying the rotation of the guard arm is restrained, which causes another disadvantage that the smooth operation of the guard arm device is reduced.

This invention is an improvement of the invention according to the earlier proposal of the present applicant, which solves the above-mentioned inconvenience, prevents unauthorized release of the guard arm device by operating the thumb turn, and smoothly operates. It is intended to provide a guard arm lock.

It is another object of the present invention to reduce the length of the lock box in the vertical direction by devising the location of the dead bolt for final tightening.

[0011]

In order to achieve the above object, according to the present invention, a rotating shaft fixed rearward at one end of a guard arm can be advanced to and retracted from a lock box fixed to a door. And at the other end of the guard arm, the engaging projection protruding forward is selectively engageable with the long hole of the strike fixed to the door frame. Between the passive member rotatably mounted on the rotating shaft and the laterally movable member that slides and displaces laterally in the lock box via the cam by the operation of the thumb turn provided on the indoor side of the door. The lateral displacement of the laterally moving member can be converted into the lateral and tilting displacements of the passive member by linking with a pivoting member provided so as to be able to pivot inside, while being connected to the rear of the passive member. The member is formed integrally, while the connecting member and one end are superposed. A control member whose center is rotatably supported is provided by urging the control member with a spring in the advance direction of the rotating shaft, and a connection pin is implanted at one of one end of the connection member and the control member, and The control member and the passive member are connected to each other by opening the long hole and slidably engaging the connecting pin and the long hole, and the other end of the control member is provided with a stop provided in connection with the thumb turn. The guard arm is selectively engaged when the guard arm is not actuated so that the member can be stopped in the non-actuated state.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, a dead bolt guided laterally in a lock box via a dead cam by operating a thumb turn or a key is provided. When projecting from the box, the distal end portion is disposed so as to be able to selectively penetrate through a through hole provided in a vertical intermediate portion of the guard arm, and the distal end portion of the dead bolt is engaged with the elongated hole of the strike. It is characterized by having done.

[0013]

According to the first aspect of the present invention, when the guard arm shown in FIG. 1 is in the housed state (normal state), the rotating shaft is kept substantially horizontal, and the guard is connected to the outer end thereof. The arm is housed in a housing formed on the front plate.

The passive member fitted to the rotary shaft is immovably positioned by holding the swinging member, the laterally moving member, the cam and the thumb turn, which are successively and rigidly linked, at their original positions.

Furthermore, in this normal state, the control member is engaged with a stop member linked to the thumb turn against the urging force of the spring, and stops the rotation shaft or the passive member in an inoperative state. It is.

In order to move the guard arm from the storage position shown in FIG. 1 to the protruding position (operation position) shown in FIG. 3, after closing the door, the thumb turn is operated to rotate, for example, 45 degrees.

Then, the traverse member moves forward in the direction of the front plate by being driven by the cam, and as the traverse member advances, the oscillating member having one end engaged with the traverse member rotates.

Then, the drive pin implanted at the other end of the swinging member pushes the operating edge of the cam hole opening of the projecting piece, so that the passive member integrated with the projecting piece tilts. In the embodiment shown in FIG. 1, the passive member tilts in the downward direction in the lock box 1. As a result, as shown in FIG. 3, the free end of the guard arm protrudes from the housing.

At the same time, the stop member, which has locked the control member in the non-operating state shown in FIG. 1, also rotates, the degree of engagement with the control member changes, and the control member becomes free. The one end of the member pushes the passive member forward by the urging force through the engagement between the elongated hole and the connecting pin and the connecting member.

Then, as shown in FIG. 3, the rotating shaft and the passive member integral therewith project forward along the axis of the rotating shaft, and the guard arm integral with the rotating shaft also projects forward and its free end. Are engaged with the strike receiving holes.

Here, when the door is opened, the guard arm rotates about the rotation axis at the base end thereof as a center of rotation, and the engaging projection at the free end is inserted into the elongated hole while being prevented from being pulled out by the elongated hole of the strike. When the engagement protrusion reaches the end of the slide, the opening angle of the door is limited.

When the guard arm device is operated, the angle and distance of the rotation axis relative to the strike change with the increase of the opening angle of the door, so that the guard arm moves complicatedly. The rotation axis of the arm can be tilted with respect to the front plate, so-called miso-sliding movement or axial movement, so that no excessive force is applied to the guard arm and the rotation axis, and the guard arm device operates smoothly. Can be expected.

When the door is closed, the guard arm rotates in the reverse direction and returns to the original angular position.

When the thumb turn is operated to move the traversing member toward the original position (the position shown in FIG. 1), the oscillating member having one end engaged with the traversing member is moved when the guard arm device is operated. Rotate in the opposite direction.

Then, as shown in FIG. 4, the drive pin implanted at the other end of the swinging member moves the inclined edge formed on the projecting piece in the direction of arrow P, that is, substantially perpendicular to the inclined edge. Push in the direction.

Then, a vertical component force Q of the pushing force P as a vector applied to the inclined edge acts in a direction for correcting the inclination of the rotation axis, while a horizontal component force R is applied.
Acts in a direction to move the rotating shaft pushed forward by the control member inward along the axial direction thereof.

At the same time, or prior to the action of the drive pin on the inclined edge, a stop member integral with the cam engages the other end of the control member to cause the control member to return to its original position against its biasing force. That is, it is rotated in the position direction shown in FIG.

By these actions, the swing member rotates in the opposite direction to the above, and the rotating shaft and the passive member integrated therewith are
The rotary shaft is pushed back backward (inward of the lock box) while correcting the inclination of the rotating shaft, and returns to the normal position shown in FIG.

At the same time, the control member is locked inoperative by the stop member.

In the process of returning the control member to the normal position, the control member acts to engage the elongated hole with the connection pin and return the passive member to the rear normal position via the connection member. .

That is, the control member and the passive member are mutually restrained in the front-rear direction perpendicular to the front plate of the lock box through the engagement of the connection member and the connection pin with the long hole.

Therefore, when the door is opened, a hand or tool is inserted through a slight gap between the door and the door frame to operate the thumb turn, and if the guard arm device is to be illegally released, the thumb turn moves. As a result, the control member that returns to the normal position attempts to retract the passive member inward.

However, when the door is open, the guard arm comes out of the housing of the front plate, and
Since the guard arm is inclined with respect to the longitudinal direction of the front plate, when the passive member tries to move inward, the guard arm integrated with the passive member is caught on the front plate and the passive member cannot move. The device cannot be released.

According to the second aspect of the present invention, when the key or the thumb turn is operated, for example, by 90 degrees from the angular position shown in FIG. 1, the dead bolt can be projected to the locked position shown in FIG. 5 via the dead cam. it can.

At this time, the dead bolt penetrates through the through hole provided in the guard arm and engages with the long hole of the strike, so that the door is in the locked state and the final tightening is achieved. To release the locked state of the deadbolt, the key or the thumbturn may be returned to the original angular position.

[0036]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings. 1 and 2, reference numeral 1 denotes a lock box of a guard arm lock fixed to a free side edge of a door (not shown).
Is a side plate of the lock box 1, 3 is a front plate of the lock box 1, 4 is formed on an outer surface of the front plate 3, and a guard arm 5 described later is provided.
Reference numeral 6 denotes a box-shaped storage portion provided behind the front plate 3 for accommodating the guard arm 5 when not in operation.

The lock box 1 in the illustrated example is also used as a lock box for a guard arm lock and a permanent lock with a dead bolt 7.

The dead bolt 7, which is guided in the front-rear direction (horizontal direction) with respect to the lock box 1, has a rear part which is turned by a key or thumb turn (not shown) on a dalma assembly 8 mounted on the lock box 1. 9 is engaged. Needless to say, the key is inserted into and removed from a cylinder lock provided outside the door.

The dead bolt 7 is guided by a plate-like guide means 11 having a through hole, a guide means (not numbered) combining a pin and a long hole, and the like.

Reference numeral 12 is supported on the side plate 2 of the lock box 1,
The V-shaped oscillating piece engaged with the dead bolt 7 urges the dead bolt 7 rearward together with the torsion spring 13.

The guard arm 5, which is one of the main members of the present invention, has a rotating shaft 14 fixed rearward at one end. The rotating shaft 14 includes a support piece 15 fixed to the lock box 1.
And can be moved back and forth (possibly into and out of) through the shaft so as to be rotatable about an axis.

In the portion where the rotating shaft 14 is held by the support pieces 15, the rotating shaft 14 is allowed to move in the axial direction and to tilt with respect to the horizontal.

At the free end of the other end of the guard arm 5, an engaging projection 16 projecting forward is provided. The engaging projection 16 in the illustrated example is composed of a short axis 18 having a bulge 17
And an anti-friction collar 19 fitted around.

The engaging projection 16 selectively engages with an elongated hole fixed along the length of a strike (not shown) fixed to the door frame when the guard arm device is operated. The mode of engagement between the elongated hole of the strike and the engagement projection 16 of the guard arm is already known, and therefore, a more detailed description is omitted.

An elongated hole (not shown) of the strike also serves as a hole for inserting the dead bolt 7 at the time of locking. FIG.
As shown in FIG. 5, the dead bolt 7 is made to penetrate the rear plate of the storage section 6 of the lock box 1, and at the time of locking, the key or the thumb turn is rotated by, for example, 90 ° so that the dead bolt 7 is moved as shown in FIG. When it protrudes, the tip of the dead bolt 7 penetrates through the through hole 21 (see FIG. 2) provided in the longitudinal middle portion of the guard arm 5 and engages with the long hole of the strike (FIG. 5).
reference).

The configuration in which the dead bolt 7 is disposed at a position where the guard arm 5 is penetrated in the final tightening operation is as follows.
The length of the lock box 1 in the vertical direction (vertical direction) can be reduced, which is advantageous in forming the lock box 1 in a small size.

Next, the operation mechanism 22 for moving the guard arm 5 and the rotating shaft 14 forward and backward will be described. Actuation mechanism 2
Reference numeral 2 denotes a cam 23 rotatably operated by a thumb turn provided on the indoor side of the door, and a laterally moving member which abuts the cam 23 and slides and displaces in the lock box 1 in the front-rear direction perpendicular to the front plate 3. 2
4, a block-shaped passive member 25 rotatably fitted to the rotating shaft 14, and disposed between the laterally-moving member 24 and the passive member 25, and a central portion of the lock box side plate can swing. It is supported and has a rocking member 27 having one end engaged with the lateral movement member 24 and a driving pin 26 (see FIG. 4) implanted at the other end.

The cam 23 is linked to the thumb turn in the dharma assembly 8 and has three driven surfaces 24a, 24b, 24
c, abuts in accordance with the displacement of the lateral movement member 24.

The displacement of the lateral movement member 24 in the front-rear direction is
The guide is linearly guided by a well-known means such as a guide means 28 comprising a pin and a guide hole provided between the side plate 2 and the side plate 2.

The laterally moving member 24 and the swinging member 27 are linked by engaging means 29 formed by a combination of a pin and a long hole in the front-rear direction. The pin and the long hole are
4 and 27 can be provided opposite each other.

In the embodiment shown in FIG. 1, the passive member 25 is formed in a block shape having a rectangular frame at the center, and the rotating shaft 14 penetrates the frame in the front-rear direction perpendicular to the front plate. And is rotatably fitted to it.

The passive member 25 is slidably held between the pair of side plates 2 and 2 of the lock box. Therefore, in the lock box 1, it can swing around the fitting portion between the rotating shaft 14 and the support piece 15, but is restricted in the thickness direction of the lock box.

Further, in order to prevent the rotating shaft 14 from slipping out of the passive member 25, a groove is formed in the outer peripheral surface of the inner end portion of the rotating shaft 14, and a retaining pin which engages with this groove is formed. 31 is driven so as to penetrate the passive member 25.

Although this is not an essential component of the present invention, the bearing hole 2 of the passive member 25 fitted to the rotary shaft 14
The cross-sectional shape of 5a is an oval shape that is long in the vertical direction. This is to increase the degree of freedom of swing of the rotating shaft 14.

Therefore, in the illustrated embodiment, as shown in FIG. 1, two retaining pins 31 are provided so that the rotating shaft does not come off even if the inner end of the rotating shaft 14 moves in the bearing hole 25a. This is being driven.

A flat portion 14a is formed in a portion of the rotary shaft 14 which faces the space inside the rectangular frame of the passive member. On the other hand, a joining portion 32 which can be surface-bonded to the flat portion 14a is formed in the frame. An adjusting member 33 is provided, and the adjusting member 33 is in elastic contact with the rotating shaft 14 by the elastic force of the compression coil spring.

The angular position of the flat portion 14a with respect to the guard arm 5 is set so as to be symmetric with respect to the guard arm 5 with respect to the center axis of the rotating shaft 14, so that the joint 32 of the adjusting member 33 is in contact with the flat portion 14a. The guard arm 5 is aligned with the storage section 6 of the front plate 3 when they are combined.

When the door is closed after the guard arm device is operated, the adjusting member 33 aligns the guard arm 5 with the storage portion, and shifts the rotating shaft 14 to one of the bearing holes 25a of the passive member. It has the function of putting.

The passive member 25 has a projecting piece 34 integrally connected to the body. The projecting piece 34 is for linking the passive member 25 to the swinging member 27, and in the illustrated embodiment, the projecting piece 34 is a plate-like body substantially parallel to the side plate 2 of the lock box.

As shown in FIG. 4, the projecting piece 34 has an inclined edge 34 a facing the drive pin 26 implanted in the swinging member 27 from the rear so as to be engaged therewith, and the inclined edge 34 a. A substantially triangular cam hole (not numbered) including an oblique working edge 34b is opened so as to sandwich the drive pin.

The operating edge 34b engages with the drive pin 26 when the guard arm device is activated to tilt the passive member 25, and the inclined edge 34a is used to release the drive pin 2 when the guard arm device is released.
As described above, the passive member 25 and the rotating shaft 14 integrated therewith are pushed axially and rearward by the wedge action generated between the guard member 6 and the guard member to return to the normal position. It is.

The operating mechanism 22 includes the auxiliary operating mechanism 3
5 are attached. The auxiliary operating mechanism 35 is disposed behind the passive member 25 in the lock box, and has a central portion swingably supported at one end and a connecting member integrally formed at one end behind the passive member 25. And a control member 38 urged forward by the elastic force of the torsion spring 37.
And a stop member 39 provided in association with the thumb turn and locking the control member 38 in a non-operating state in a normal state.

The control member 38 and the connecting member 36 are slidably engaged with the long hole 38a opened in the control member 38 and the connecting pin 41 implanted at the free end of the connecting member 36. Are connected in a restrained state in the front-rear direction while allowing mutual rocking.

It is to be noted that, contrary to the above, a long hole may be opened in the connecting member 36 and a connecting pin 41 may be planted on the control member 38 side.

The control member 38 causes the rotating shaft 14 to protrude forward when the guard arm device is operated, and the stop member 39 operates to return and rotate the control member 38 to the normal position when the guard arm device is released. Is as described above.

Although this is not an essential component of the present invention, a projection 42 is formed on the rear side (lock box side) of the base end of the guard arm 5 until the guard arm 5 contacts the front plate 3. It is a good idea to keep your play small.

[0067]

As is apparent from the above description, the invention according to the first aspect includes a guard arm and a passive member integral with the rotation shaft thereof, and a control member for pushing the guard arm device forward when the guard arm device is operated. Can be mutually swung by engagement of the long hole and the connection pin slidably engaged with the long hole, but are connected in the front-rear direction so as to be mutually restrained. Attempting to unlock the guard arm device by operating the thumb turn from the gap in the door, the passive member and the guard arm integrated therewith follow the rearward movement of the control member. On the other hand, since the guard arm in the inclined state is hooked on the front plate, the thumb turn cannot be rotated any more, and as a result, unauthorized release of the guard arm device can be completely prevented. There is an effect that.

When the guard arm device is operated, the rotating shaft carrying the guard arm can not only tilt with respect to the front plate of the lock box but also move in the axial direction thereof. Needless to say, the desired object of achieving the desired purpose that the guard arm device can be smoothly operated for a long period of time without causing twisting in the shaft portion).

According to the second aspect of the present invention, the dead bolt guided in the front-rear direction is disposed at a vertical position such that it penetrates through the middle portion of the guard arm.
The size of the lock box in the vertical direction (up and down direction) can be reduced, which is advantageous for downsizing the lock box.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view of a guard arm lock according to an embodiment of the present invention, showing a normal state in which a guard arm is stored.

FIG. 2 is a front view of the guard arm lock shown in FIG. 1;

FIG. 3 is a partial cross-sectional side view of the guard arm lock similar to that of FIG. 1, showing a guard arm device operating state.

FIG. 4 is an enlarged side view showing a main part of an operation mechanism.

FIG. 5 is a partial cross-sectional side view of the guard arm lock similar to FIG. 1, showing a locked state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lock box 5 Guard arm 7 Dead bolt 8 Dharma assembly 14 Rotating shaft 14a Flat part 15 Supporting piece 16 Engagement protrusion 22 Operating mechanism 23 Cam 24 Lateral member 25 Passive member 26 Drive pin 27 Swing member 32 Joint 33 Adjustment Member 34 Projection piece 34a Inclined edge 34b Operating edge 35 Auxiliary operating mechanism 36 Connecting member 38 Control member 38a Slot 39 Stop member 41 Connecting pin

──────────────────────────────────────────────────の Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E05C 17/06 E05B 65/06

Claims (4)

(57) [Scope of request for utility model registration] 1. A rotating shaft fixed rearward to one end of a guard arm is held by a lock box fixed to a door so as to be able to advance and retreat and to be rotatable, and protrudes forward from the other end of the guard arm. The engaging projection is selectively engageable with the long hole of the strike fixed to the door frame, and is provided on the indoor side of the door and the passive member rotatably mounted on the rotating shaft in the lock box. The operation of the thumb turn allows the swinging member, which is slidably displaced in the lock box to move laterally in the lock box via the cam, to be linked by a swing member provided to be swingable in the lock box, so that the movement of the A lateral displacement can be converted into a lateral displacement and a tilting displacement of the passive member. On the other hand, a connecting member is integrally formed at the rear of the passive member. The control member, which is rotatably supported, is attached by a spring in the advance direction of the rotating shaft. Along with providing a bias, a connecting pin is implanted in one of the connecting member and one end of the control member,
The control member and the passive member are connected to each other by opening a long hole on the other side and slidably engaging the connecting pin and the long hole, and the other end of the control member is provided in connection with the thumb turn. A guard arm lock characterized in that the guard arm is selectively engaged with the stop member when the guard arm is not actuated and can be stopped in a non-actuated state. 2. A lock shaft fixed rearward to one end of a guard arm is held by a lock box fixed to a door so as to be able to advance and retreat and to be rotatable, and protrudes forward from the other end of the guard arm. The engaging projection is selectively engageable with the long hole of the strike fixed to the door frame, and is provided on the indoor side of the door and the passive member rotatably mounted on the rotating shaft in the lock box. The operation of the thumb turn allows the swinging member, which is slidably displaced in the lock box to move laterally in the lock box via the cam, to be linked by a swing member provided to be swingable in the lock box, so that the movement of the A lateral displacement can be converted into a lateral displacement and a tilting displacement of the passive member. On the other hand, a connecting member is integrally formed behind the passive member. The control member, which is rotatably supported, is attached by a spring in the advance direction of the rotating shaft. Along with providing a bias, a connecting pin is implanted in one of the connecting member and one end of the control member,
The control member and the passive member are connected to each other by opening a long hole on the other side and slidably engaging the connecting pin and the long hole, and the other end of the control member is provided in connection with the thumb turn. When the guard arm is not actuated, the guard arm is selectively engaged when the guard arm is not actuated so that the guard arm can be stopped in the non-actuated state. The dead bolt is disposed so that when it protrudes from the lock box, its distal end can be selectively penetrated through a through hole provided in a longitudinally intermediate portion of the guard arm, and the dead bolt distal end is formed by the elongated hole of the strike. A guard arm lock characterized in that it is engaged with a guard arm. 3. A flat portion parallel to the rotation axis is formed in a portion of the guard arm that engages with the passive member on the rotating shaft, and a joining portion that is held by the passive member and that can be surface-bonded to the flat portion is formed. The adjustment member having the spring is elastically contacted with the rotation shaft with a spring, and the guard arm is parallel to the front plate of the lock box when the flat portion of the rotation shaft and the joint of the adjustment member are surface-joined. The guard arm lock according to claim 1 or 2, wherein 4. The rocking member is disposed between the traversing member and the passive member, and a central portion is slidably supported on a side plate of the lock box, and one end is engaged with the traversing member. A drive pin is implanted at the other end of the swing member, and the drive pin is integrally connected to the passive member by a plate-shaped body parallel to the side plate of the lock box, and a cam hole is opened. The cam hole of the protruded piece is engaged with the inclined end edge facing the drive pin so as to be engageable from the rear, and the working end obliquely interposing the inclined end edge and the drive pin. 4. The guard arm lock according to claim 1, wherein the guard arm lock is formed in a substantially triangular shape including an edge.