JP4453913B2 - Automatic door locking device - Google Patents

Description

  The present invention relates to a locking device for an automatic door that automatically opens and closes a sliding door or gate, or a door such as a swing door or gate, and more particularly, an automatic door locking device that opens and closes a lock remotely. About.

  For example, at the entrances and exits of apartment buildings such as condominiums and office buildings, always keep the doors such as doors and gates locked, and check the visitors using an intercom etc. If the door is unlocked by remote control when it is determined to allow access, or the visitor is allowed to enter by checking the visitor with the security authentication system, the system will automatically A so-called auto-locking system that unlocks a door / entrance door by remote control is generally known.

In an automatic door locking device used in such an automatic lock system, as described in Patent Document 1, a lock tip is slid by a drive device into a lock hole of a lock bracket fixed to the door and inserted. There are some which are configured to be locked, and to be unlocked by sliding the lock tip in the reverse direction by the driving device and detaching it from the lock hole of the lock receiving metal fitting.
Japanese Patent Application Laid-Open No. 08-100552

  The principle of such a conventional automatic door locking device is that, for example, as shown in FIGS. 12a and 12b, the lock tip a is moved straight by an electromagnetic solenoid b that is a drive device, thereby receiving the lock tip a. It is configured to be locked by being inserted vertically into the lock hole d of the metal fitting c, and unlocked by pulling the lock tip a vertically from the lock hole d by the spring force of the spring member e when the electromagnetic solenoid b is not energized. Yes.

  However, in such a conventional automatic door locking device, the lock tip a moves straightly vertically with respect to the lock hole d of the lock receiving metal fitting c, so that the spring force of the spring member e as shown in FIG. When the lock tip a is pulled out from the lock hole d of the lock receiving metal c and unlocked, the lock tip a moves while being in contact with the inner surface of the lock hole d, so that friction between the lock tip a and the inner surface of the lock hole d occurs. The smooth movement of the lock tip a is hindered by the force, and sometimes it is impossible to unlock the lock quickly.

  In order to avoid such inconvenience, it is necessary to increase the spring force of the spring member e. However, if the spring force of the spring member e is increased, the operating force of the electromagnetic solenoid b must be increased accordingly. Don't be. However, since it is difficult to take a large space near the door, there is a problem that the usable electromagnetic solenoid b is limited to a small one as much as possible. For this reason, the spring member e which can be used is also limited to those having a weak spring force.

  Further, in order to avoid frictional resistance between the lock tip a and the inner surface of the lock hole d as much as possible, it is conceivable to add parts made of a material having a small friction coefficient to the lock tip a and the lock receiving metal c. Such a structure not only increases the number of parts and increases the cost, but also does not provide a fundamental solution to the problem. Thus, when locking, as shown in FIG. 12b, the lock tip a does not contact the inner surface of the lock hole d of the lock fitting c, and a sufficient gap s is provided between the lock tip a and the inner surface of the lock hole d. However, such a structure has a disadvantage that the play of the door becomes large.

    The problem to be solved by the present invention is to provide a frictional resistance between the lock tip and the lock receiving metal fitting when locking and unlocking without providing a gap between the lock tip and the lock receiving metal fitting. It is to provide a locking device for an automatic door that can be locked and unlocked by operating the lock tip quickly and reliably.

In order to solve the above problems, the present invention includes the following components.
In addition, the reference numerals of the drawings attached to the respective elements described in the section of each embodiment described later are attached to the respective constituent elements together with parentheses.

As shown in FIGS. 1 to 11, the invention described in claim 1 is an automatic door locking device that automatically locks and unlocks a door (sliding door 1) that automatically opens and closes the doorway (K). A lock tip (13) swinging around a support shaft (lock tip indication shaft 15) fixed to the side, and the lock tip (13) swings regardless of the movement of the door (sliding door 1). A drive mechanism (14), and a lock receiving metal fitting (10) provided in the door and having a lock hole (10a) formed therein, and the lock tip (13) is substantially L-shaped, A base end portion which is one end portion of an L-shape is rotatably supported by the support shaft (lock tip support shaft 15), and the support shaft (lock tip support shaft 15) is centered by the drive mechanism (14). By swinging the lock tip (13), the L-shaped base end portion of the lock tip (13) is opposite to the base end portion. A locking device of the automatic door, characterized in that to part a is the tip portion (13a) engaged disengageably engaged in Joana (10a) of said lock receiving metal (10).

As shown in FIGS. 1 to 11, the drive mechanism (14) is connected to the lock tip (13) via a slide guide (slide guide groove 16), and the drive lever (17). An electromagnetic solenoid (18) that swings the lock tip by operating a lever, and a spring member (19) that urges the drive lever in a direction opposite to the operation direction of the electromagnetic solenoid when the electromagnetic solenoid is not energized. Prepared .

According to a second aspect of the present invention, as shown in FIGS. 1 to 9, the electromagnetic solenoid (18) operates the drive lever (17) against the spring force of the spring member (19) when energized. By doing so, the lock (13) is engaged with the lock bracket (10) and locked, and the drive lever is moved in the direction opposite to the operation direction by the electromagnetic solenoid by the spring force of the spring member when not energized. 2. The automatic door locking device according to claim 1 , wherein the locking device is unlocked by being operated to be detached from the lock receiving bracket. 3.

According to a third aspect of the invention, as shown in FIGS. 10 and 11, the electromagnetic solenoid (18), said spring member (19) by the spring force of operating the said drive lever (17) when not energized Thus, the lock (13) is engaged with the lock bracket (10) and locked, and the drive lever is moved in a direction opposite to the operating direction of the spring member against the spring force of the spring member when energized. 2. The automatic door locking device according to claim 1 , wherein the locking device is unlocked by being operated to be detached from the lock receiving bracket. 3.

As for invention of Claim 4 , as shown in FIGS. 1-11, the said door (sliding door 1) is a sliding door or a sliding gate, Either of Claims 1-3 characterized by the above-mentioned. The automatic door locking device according to claim 1.

The invention according to claim 5 is the automatic door locking device according to any one of claims 1 to 3 , wherein the door is a swing type door or a swing type gate.

According to the first aspect of the present invention, the lock receiving bracket provided on the door is provided with the lock tip that is rocked by the drive mechanism with the drive mechanism swinging around the support shaft fixed to the entrance / exit side. The lock tip is engaged with the lock hole so that the lock tip swings around the support shaft both when unlocking and when locking. Does not move while coming into contact with the lock bracket, but can be moved with the engagement surface of the lock tip facing the engagement surface of the lock bracket to disengage and engage the lock tip with the lock bracket. it can.

That is, when the unlocking is also engaged in contact with the intruded tablets destination tablets receiving metal to lock hole, since Josaki about the support shaft swings, tablets destination entered the lock hole It does not move while coming into contact with the lock bracket, the engagement surface of the lock tip moves away from the engagement surface of the lock bracket, and the lock tip is detached from the lock bracket. Also, when locking, the lock tip swings around the support shaft, so that the lock tip does not move into the lock hole while contacting the lock support fitting, and the engagement surface of the lock tip engages with the lock support fitting. Engage in close proximity while facing the surface. For this reason, it is possible to minimize the frictional resistance between the lock tip and the lock bracket without locking the lock tip and the lock bracket, both when locking and when unlocking. Thus, the lock can be locked and unlocked by operating the lock tip promptly and reliably.

The drive mechanism includes a drive lever connected to the lock tip via a slide guide, an electromagnetic solenoid that operates the drive lever to swing the lock tip, and the drive lever is operated when the electromagnetic solenoid is not energized. Because the drive lever functions as a link mechanism by providing a spring member that urges in the direction opposite to the direction of movement due to the movement of the lock lever, even if the amount of movement of the drive lever by the electromagnetic solenoid is small, The amount can be increased. For this reason, the electromagnetic solenoid can be reduced in size, and the spring force of the spring member can be reduced, whereby the locking device as a whole can be reduced in size.

  In this case, since the drive lever swings the lock tip via the sliding guide, the lock tip can be swung reliably and smoothly. In addition, if the drive lever is in a state of standing almost vertically with respect to the lock receiving bracket and the lock is engaged with the lock receiving bracket, the lock receiving bracket contacts the lock tip to forcefully open the door. Even if it comes into contact, the drive lever functions as a support rod for the lock tip, so that the lock tip can be prevented from moving in the direction of detachment from the lock receiving bracket, and this ensures that the lock is held securely. Since it can, a highly safe thing can be obtained.

According to the second aspect of the present invention, when the electromagnetic solenoid operates the drive lever against the spring force of the spring member when energized, the lock tip is engaged with the lock bracket and locked, and the deenergization is performed. Sometimes, by operating the drive lever in the direction opposite to the operation direction by the electromagnetic solenoid by the spring force of the spring member, the lock tip is released from the lock receiving metal fitting and unlocked, so that it can be locked when the electromagnetic solenoid is energized, Can be unlocked when the electromagnetic solenoid is not energized.

According to the third aspect of the present invention, the electromagnetic solenoid operates the drive lever by the spring force of the spring member when not energized to lock the lock by engaging the lock receiving bracket, and the spring member when energized. By operating the drive lever in the direction opposite to the operating direction of the spring member against the spring force, the lock tip is released from the lock receiving metal and unlocked. It can be locked when the electromagnetic solenoid is not energized, and can be unlocked when the electromagnetic solenoid is energized.

According to invention of Claim 4 , when a door is a sliding door or a sliding gate, it can apply suitably to a sliding door or a sliding gate.

According to the invention described in claim 5 , since the door is a swing type door or a swing type gate, it can be suitably applied to a swing type door or a swing type gate.

(Embodiment 1)
Hereinafter, with reference to FIGS. 1-9, Embodiment 1 of the locking device of the automatic door to which this invention is applied is demonstrated.
FIG. 1 is a diagram showing the overall configuration of an automatic door device, and FIGS. 2 to 5 are diagrams showing the automatic door locking device of FIG.
As shown in FIG. 1, the automatic door device includes a sliding door 1 that closes an entrance K of a building T so as to be freely opened and closed. The sliding door 1 is a sliding door, and a pair of door carts 2 are provided on both sides of the upper portion of the sliding door 1, and the door 2 rolls on a rail 3 provided at the upper portion of the doorway K, thereby K is configured to open and close.

  In this case, a door opening / closing device 4 is provided above the rail 3. The door opening and closing device 4 includes a pair of pulleys 5 disposed above both sides of the rail 3, a driving belt 6 wound around the pair of pulleys 5, a driving unit 7 including a motor that drives the one pulley 5, and the like. The door connecting plate 8 provided on the upper part of the sliding door 1 is attached to the drive belt 6, and when the pulley 5 is rotated by the drive unit 7 in this state, the drive belt 6 is moved along with this rotation and the door is moved. The sliding door 1 is automatically moved by moving the connecting plate 8.

  Moreover, as shown in FIGS. 1 and 2, a lock bracket 10 is provided on the upper part of the sliding door 1. A locking device 11 is provided at a position corresponding to the lock bracket 10, that is, at a position corresponding to the lock bracket 10 when the sliding door 1 is in a state where the doorway K is closed. As shown in FIGS. 2 to 5, the locking device 11 includes a base member 12 fixed to a building T. The base member 12 is bent into an L shape and has a bottom portion 12a and a side wall portion 12b. The base member 12 is mounted with a lock tip 13 detachably engaged with the lock hole 10 a of the lock receiving metal fitting 10 and a drive mechanism 14 for swinging the lock tip 13.

  As shown in FIG. 3, the lock tip 13 is formed in an approximately L shape, and its base end portion (left end portion in FIG. 3) rotates around a lock tip support shaft 15 provided on the side wall portion 12 b of the base member 12. The tip end 13a is removably inserted into and engaged with the lock hole 10a of the lock receiving bracket 10 so as to swing up and down about the lock support shaft 15 as a center. Yes. The drive mechanism 14 includes a drive lever 17 connected to the lock tip 13 via a slide guide groove 16, an electromagnetic solenoid 18 that operates the drive lever 17 to swing the lock tip 13, and a non-rotation of the electromagnetic solenoid 18. A spring member 19 that urges the drive lever 17 in a direction opposite to the operation direction of the electromagnetic solenoid 18 when energized is provided.

  As shown in FIGS. 3 to 5, the drive lever 17 of the drive mechanism 14 has a lower end rotatably attached to a lever support shaft 21 of a mounting plate 20 provided on the bottom 12 a of the base member 12. The lever tip shaft 22 is attached to the portion, and the lever tip shaft 22 is slidably disposed in the sliding guide groove 16 of the lock tip 13 and connected to the lock tip 13.

  As a result, as shown in FIG. 3, when the drive lever 17 rotates about the lever support shaft 21 at the lower end, the lever tip shaft 22 at the upper end slides in the slide guide groove 16 of the lock 13. Thus, the lock 13 is configured to swing up and down. In this case, when the lever tip shaft 22 at the upper end moves toward the lock support shaft 15 side of the lock 13, the drive lever 17 tilts downward and pulls down the lock 13. When the tip shaft 22 moves toward the side opposite to the lock tip support shaft 15 of the lock tip 13, the lock tip 13 is pushed up while standing up so as to be substantially vertical.

  As shown in FIGS. 3 to 5, the electromagnetic solenoid 18 includes a solenoid body 23 fixed to the side wall portion 12 b of the base member 12, and a plunger 24 disposed in the solenoid body 23 so as to be movable in the protruding and retracting direction. And a magnetic field is generated by causing a current to flow through a coil (not shown) in the solenoid body 23 so that the plunger 24 is linearly moved in the direction in which the plunger 24 is drawn into the solenoid body 23 by the generated magnetic field. . In this case, the electromagnetic solenoid 18 is connected in a direction in which the distal end portion of the plunger 24 is connected to the lower side of the intermediate portion of the drive lever 17 by the connecting shaft 25, and the plunger 24 is pulled in when energized to stand the drive lever 17 almost vertically. It is configured to rotate and thereby push up the lock 13.

  As shown in FIGS. 3 and 4, the spring member 19 has one end attached to the connecting shaft 25 of the plunger 24 and the other end attached to an attachment pin 26 provided on the base member 12. Thus, the drive lever 17 is configured to be urged in the direction opposite to the operation direction by the electromagnetic solenoid 18. As a result, when the electromagnetic solenoid 18 is not energized, the spring member 19 causes the drive lever 17 to rotate in the direction opposite to the operation direction by the electromagnetic solenoid 18, that is, the direction inclined downward to the right by the spring force so as to pull down the lock 13. It is configured.

Next, the operation of the automatic door locking device 11 will be described.
As shown in FIG. 6A, the electromagnetic solenoid 18 is in a non-energized state in advance, so that the drive lever 17 rotates counterclockwise around the lever support shaft 21 at the lower end by the spring force of the spring member 19. The lever tip shaft 22 of the drive lever 17 is located at the inner end portion (the inner end portion on the left side in the figure) of the lock tip 13 on the lock tip support shaft 15 side in the sliding guide groove 16. For this reason, the lock 13 rotates downward about the lock support shaft 15, and the distal end 13 a of the lock 13 is separated below the lock bracket 10 of the sliding door 1. Thereby, since the movement of the lock receiving metal fitting 10 is not hindered by the lock tip 13, it is movable with the sliding door 1.

  In this state, when the sliding door 1 is moved by the door opening / closing device 4 and closes the entrance K, the lock 13 of the locking device 11 corresponds to the lock fitting 10 of the sliding door 1 as shown in FIG. The locking device 11 can be used for locking. At this time, first, the electromagnetic solenoid 18 is energized by a remote operation. Then, as shown in FIG. 6B, the plunger 24 of the electromagnetic solenoid 18 is drawn into the solenoid body 23 against the spring force of the spring member 19. As a result, the drive lever 17 rotates clockwise, and the lever tip shaft 22 of the drive lever 17 moves in a direction away from the lock support shaft 15 in the slide guide groove 16 of the lock 13.

  When the retracting operation of the plunger 24 of the electromagnetic solenoid 18 stops, the lever tip shaft 22 of the drive lever 17 moves in the sliding guide groove 16 of the lock tip 13 as shown in FIG. The drive lever 17 stands substantially vertically in contact with the inner end opposite to the shaft 15 (the inner end on the right side in the figure). As a result, the lock tip 13 is pushed up most, and the distal end portion 13a of the lock tip 13 is inserted into the lock hole 10a of the lock bracket 10 and engaged.

  In this state, as shown in FIG. 7, the drive lever 17 stands substantially vertically on the bottom portion 12 a of the base member 12, so that the drive lever 17 serves as a support bar for the lock tip 13 and below the lock tip 13. Can be prevented from rotating. For this reason, even if the edge of the lock hole 10 a of the lock receiving metal fitting 10 comes into contact with the tip 13 a of the lock tip 13 to try to open the sliding door 1 forcibly, the lock lever 13 is locked by the drive lever 17. It is possible to prevent 13 from rotating downward. Thereby, a locked state can be hold | maintained reliably.

  On the other hand, when unlocking in this locked state, the energization of the electromagnetic solenoid 18 is cut off in FIG. Then, since the plunger 24 of the electromagnetic solenoid 18 is in a free state, the spring member 19 pulls the drive lever 17 by its spring force as shown in FIG. 8B. As a result, the drive lever 17 rotates counterclockwise around the lever support shaft 21 at the lower end thereof, and the lever tip shaft 22 of the drive lever 17 moves within the slide guide groove 16 of the lock tip 13. It moves toward the 15 side and rotates the lock tip 13 downward. For this reason, the tip end portion 13 a of the lock tip 13 moves while rotating downwardly of the lock receiving metal fitting 10.

  Then, as shown in FIG. 8C, the drive lever 17 is further rotated by the spring member 19, and the lever tip shaft 22 of the drive lever 17 is locked within the sliding guide groove 16 of the lock 13. When it comes into contact with the inner end (the left inner end in the figure), the lock lever 13 is pulled down by the drive lever 17, so that the lock pad 13 rotates downward about the lock support shaft 15. The distal end portion 13 a of the lock tip 13 is detached to the lower side of the lock bracket 10 of the sliding door 1. As a result, the lock by the lock tip 13 is unlocked, and the lock bracket 10 is movable with the sliding door 1 without being blocked by the lock tip 13.

  Thus, according to this automatic door locking device 11, the lock member support shaft 15 is provided on the base member 12 provided on the entrance / exit K side, and the lock member 13 that swings around the lock member support shaft 15 is provided. Since the lock tip 13 is removably engaged with the lock hole 10a of the lock receiving bracket 10 provided in the sliding door 1 by swinging it with the drive mechanism 14, both when unlocking and when locking. However, since the lock tip 13 swings around the lock support shaft 15, the lock tip 13 does not move while being in contact with the lock fitting 10, and the tip 13 a of the lock tip 13 is locked to the lock of the lock fitting 10. The lock tip 13 can be detached from and engaged with the lock bracket 10 by moving while facing the inner surface of the hole 10a.

  That is, when unlocking, even if the tip 13a of the lock 13 is engaged with the lock hole 10a of the lock bracket 10, the lock 15 rotates downward about the lock support shaft 15. Thereby, the front-end | tip part 13a of the lock tip 13 leaves | separates from the lock hole 10a of the lock receiving metal 10 drawing the movement locus | trajectory shown to Fig.9 (a). For this reason, the tip 13a of the lock tip 13 does not move while contacting the inner surface of the lock hole 10a of the lock bracket 10, and the inner surface of the lock hole 10a of the lock bracket 10 as shown in FIG. It gradually moves away from the lock receiving metal 10 while facing it.

  Further, when locking, the lock 13 rotates upward about the lock support shaft 15 so that the tip 13a of the lock 13 draws the movement locus shown in FIG. It is inserted into the lock hole 10a of the metal fitting 10 and engaged. For this reason, the tip end portion 13a of the lock tip 13 does not move while contacting the inner surface of the lock hole 10a of the lock bracket 10, and as shown in FIG. 9 (b), on the inner surface of the lock hole 10a of the lock bracket 10. Engage closely while facing each other. Thus, when locking and unlocking, the lock 13 and the lock 13 are locked without providing a gap between the tip 13a of the lock 13 and the inner surface of the lock hole 10a of the lock bracket 10. The frictional resistance with the receiving metal fitting 10 can be minimized, and thus the lock tip 13 can be operated quickly and reliably for locking and unlocking.

  In this case, the drive function 14 for rotating the lock 13 includes a drive lever 17 connected to the lock 13 via a slide guide groove 16 and an electromagnetic for moving the lock 13 by operating the drive lever 17. The drive lever 17 functions as a link mechanism by including the solenoid 18 and the spring member 19 that urges the drive lever 17 in a direction opposite to the operation direction of the electromagnetic solenoid 18 when the electromagnetic solenoid 18 is not energized. Even if the amount of movement of the drive lever 17 by the electromagnetic solenoid 18 is small, the amount of movement of the lock 13 by the drive lever 17 can be increased. For this reason, the electromagnetic solenoid 18 can be reduced in size, and the spring force of the spring member 19 can be reduced, whereby the locking device 11 as a whole can be reduced in size.

  Further, the drive lever 17 swings the lock tip 13 reliably and smoothly because the lever tip shaft 22 swings the lock tip 13 around the lock support shaft 15 while moving the sliding guide groove 16. be able to. Furthermore, the drive lever 17 is engaged with the tip end portion 13a of the lock tip 13 in the lock hole 10a of the lock receiving bracket 10 in a state where the drive lever 17 stands substantially perpendicular to the lock receiving bracket 10. Since it functions as a support bar for the lock tip 13, even if the edge of the lock hole 10 a of the lock receiving metal 10 comes into contact with the tip 13 a of the lock tip 13 to try to force open the sliding door 1, the lock lever 13 is driven by the drive lever 17. It is possible to prevent 13 from rotating downward, whereby the lock can be securely held, and a highly safe product can be obtained.

(Embodiment 2)
Next, with reference to FIG. 10 and FIG. 11, Embodiment 2 of the automatic door locking device to which the present invention is applied will be described. In addition, the same code | symbol is attached | subjected and demonstrated to the same part as Embodiment 1 shown by FIGS.
The locking device 30 is configured to be unlocked when the electromagnetic solenoid 18 is energized and to be locked when the electromagnetic solenoid 18 is not energized. The rest of the configuration is substantially the same as that of the first embodiment. That is, as shown in FIGS. 10 and 11, the electromagnetic solenoid 18 and the spring member 19 are disposed on the left and right sides opposite to those in the first embodiment with the drive lever 17 as a boundary.

  In this case, the electromagnetic solenoid 18 is disposed on the lock tip support shaft 15 side (left side in FIG. 10) of the lock tip 13, and when energized, the plunger 24 pulls the drive lever 17 and turns the drive lever 17 counterclockwise in FIG. It is comprised so that it may rotate. Thereby, the lock tip 13 is pulled down by the drive lever 17, and the tip end portion 13 a of the lock tip 13 is configured to be detached downward from the lock hole 10 a of the lock receiving metal 10.

  The spring member 19 is disposed on the side opposite to the lock support shaft 15 of the lock 13 (right side in FIG. 10), and when the electromagnetic solenoid 18 is in a non-energized state, the drive lever 17 is operated by the electromagnetic solenoid 18. And the drive lever 17 is configured to rotate clockwise in FIG. As a result, the lock tip 13 is pushed up by the drive lever 17, and the tip end portion 13 a of the lock tip 13 is inserted into the lock hole 10 a of the lock receiving metal fitting 10 to be engaged therewith. Also at this time, the drive lever 17 pushes up the lock 13 while standing substantially vertically.

  According to such a locking device 30, when the electromagnetic solenoid 18 operates the drive lever 17 by the spring force of the spring member 19 when not energized, the lock tip 13 is engaged with the lock bracket 10 and locked. By operating the drive lever 17 in the direction opposite to the operating direction of the spring member 19 against the spring force of the spring member 19 when energized, the lock tip 13 is released from the lock fitting 10 and unlocked. Contrary to 1, it can be locked when the electromagnetic solenoid 18 is not energized, and can be unlocked when the electromagnetic solenoid 18 is energized. For this reason, also in this locking device 30, there exists an effect similar to Embodiment 1. FIG.

  In the first or second embodiment, the case where the electromagnetic solenoid 18 is used as the drive source of the drive mechanism 14 has been described. However, the present invention is not limited to this, and an electric motor, an air cylinder, a hydraulic cylinder, or the like may be used. The drive lever 17 is connected to the lock 13 and the drive lever 17 is driven by a drive source such as an electromagnetic solenoid 18. However, the drive lever 17 is not necessarily used, and the drive source such as the electromagnetic solenoid 18 is used. You may comprise so that the lock tip 13 may be driven directly.

  In the first or second embodiment, the sliding door 1 with a single opening is described as the door. However, the sliding door 1 is not limited to this, and can be applied to a sliding door with a double opening. The present invention can be applied to a gate of a type, and can also be widely applied to a door such as a swing type door or a gate.

It is the figure which showed the whole structure of the automatic door apparatus to which this invention is applied. (Embodiment 1) It is the front view of the principal part which showed the locking device of the automatic door of FIG. It is the side view which showed the locking device of the automatic door of FIG. It is the top view which showed the locking device of the automatic door of FIG. It is sectional drawing in the AA arrow of FIG. FIG. 3 shows a locking operation of the locking device of FIG. 3, (a) is a diagram showing a state before locking, (b) is a diagram showing a state where an electromagnetic solenoid is energized and a drive lever starts operating, (c) FIG. 4 is a view showing a state where the drive lever is locked by pushing up the lock tip. It is the enlarged view which showed the state of FIG.6 (c). FIG. 3 shows the unlocking operation of the locking device of FIG. 3, (a) is a diagram showing the locked state, and (b) shows the state in which the drive lever starts to operate by the spring member when the electromagnetic solenoid is turned off. (C) is the figure which showed the state which the drive lever pulled down and unlocked. The movement locus of the tip part of the lock tip in the locking device of FIG. 3 is shown, (a) shows the movement locus of the tip part of the lock tip at the time of unlocking, (b) is the tip part of the lock tip at the time of locking. FIG. It is a side view of the locking device of the automatic door to which this invention is applied. (Embodiment 2) It is the top view which showed the locking device of the automatic door of FIG. The principle in the locking device of the conventional automatic door is shown, (a) is a figure showing an example of the operation state of the lock tip and the lock receiving bracket at the time of unlocking, (b) is the lock tip and the lock receiving bracket at the time of locking It is the figure which showed the other example of the operation state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sliding door 4 Door opening / closing device 10 Lock receiving bracket 10a Lock hole 11, 30 Locking device 12 Base member 13 Lock tip 13a Tip part 14 Drive mechanism 15 Lock tip support shaft 16 Sliding guide groove 17 Drive lever 18 Electromagnetic solenoid 19 Spring member K Entrance / exit

Claims (5)

In the door locking and unlocking device that automatically opens and closes the doorway,
A lock tip that swings around a support shaft fixed to the doorway;
A drive mechanism for swinging the lock regardless of the movement of the door;
A lock receiving bracket provided on the door and formed with a lock hole;
The lock tip is substantially L-shaped, and a base end that is one end of the L-shape is rotatably supported by the support shaft,
By swinging the lock tip about the support shaft by the drive mechanism, the door is provided with a distal end portion on the opposite side to the base end portion of the L-shaped shape of the lock tip. The lock receiving metal fitting is removably engaged with the lock hole ,
The drive mechanism includes a drive lever connected to the lock tip via a slide guide, an electromagnetic solenoid that operates the drive lever to swing the lock tip, and the drive lever is moved when the electromagnetic solenoid is not energized. A locking device for an automatic door, comprising: a spring member that urges the electromagnetic solenoid in a direction opposite to the operation direction . The electromagnetic solenoid operates the drive lever against the spring force of the spring member when energized to lock the lock tip into engagement with the lock hole of the lock receiving metal, and when not energized, The lock lever is released from the lock hole of the lock bracket and unlocked by operating the drive lever in a direction opposite to the operation direction of the electromagnetic solenoid by a spring force of a spring member. Item 2. The automatic door locking device according to Item 1 . The electromagnetic solenoid operates the drive lever by the spring force of the spring member when not energized, and locks the lock by engaging the lock hole of the lock receiving metal, The locking lever is disengaged from the lock hole of the lock receiving metal by unlocking the lock lever by operating the drive lever in a direction opposite to the operation direction of the spring member against a spring force. Item 2. The automatic door locking device according to Item 1 . The automatic door locking device according to any one of claims 1 to 3 , wherein the door is a sliding door or a sliding gate. The automatic door locking device according to any one of claims 1 to 3 , wherein the door is a swing type door or a swing type gate.

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