Outward opening door lock for elevator

Abstract

The utility model discloses an outward opening door lock for an elevator, which comprises a lock box, a lock rod and a handle, a driver and a detection switch are fixedly mounted in the lock box, and two ends of the lock rod respectively extend out of two sides of the lock box. The lock rod is sequentially provided with a movable point seat located at one end of the lock rod, a cotter pin located at the rear end of the movable point seat, a lower rotating piece, a spring retracted and compressed along with the movable point seat, and a zipper device located at the other end of the lock rod. The lower rotating piece is provided with a lower rotating piece plane protruding laterally, and a groove is formed in the side face of the lower rotating piece plane. The driver is connected with an upward lifting piece, and the upward lifting piece is provided with an upward lifting connecting rod used for being clamped into the groove; the detection switch is located above the lifting piece, so that the lifting piece touches the detection switch when moving upwards; the rotating sleeve and the handle which are coaxial are installed on the inner side and the outer side of the lock box respectively. The handle is used for driving the rotating sleeve to rotate. Unlocking and locking are achieved through the structure that all the assemblies are in linkage, the unlocking and locking states are detected through the detection switch, and the lock has the advantages of being simple in structure, convenient to assemble and low in cost.

Description

Technical Field

[0001] The utility model relates to the field of door locks, in particular to an externally open door lock for an elevator. Background Art

[0002] The door lock is a barrier for the safe operation of the elevator, which can effectively prevent the landing door from being accidentally opened, thus preventing people or foreign objects from falling into the hoistway and avoiding the occurrence of safety accidents.

[0003] Existing door locks generally have a mechanical structure. When the car runs to the leveling position, the electromagnetic door knife on the car is released, hitting the upper part of the door lock to open the landing door on this floor. After closing the door and selecting the floor, the electromagnetic door knife is attracted to lock the door lock on this floor, enabling the car to run normally. At present, the following technical problems exist in this field:

[0004] 1. In the prior art, one side of the moving point seat of the door lock is inclined and the other side is flat. When the inclined side of the moving point seat hits the door frame (door panel), the moving point seat retracts and inserts into the lock hole of the door frame (door panel) to lock the landing door. Due to the influence of human factors, when closing the door forcefully, the door frame (door panel) and the moving point seat collide violently, easily causing damage to the door lock.

[0005] 2. In the prior art, the moving point seat is equipped with a contact type detection switch, which requires very high adjustment accuracy, is time-consuming and laborious to adjust, and after using for a period of time, due to the reduction of the matching accuracy between the door panel and the door frame, the contacts on the door lock will have virtual connection or non-contact phenomena, resulting in a high failure rate of the safety circuit not being connected, affecting the normal operation of the elevator.

[0006] 3. In the prior art, the door lock generally has a mechanical structure, and there is a phenomenon that the moving point seat cannot extend out after manually closing the door, and the landing door cannot be locked. Summary of the Utility Model

[0007] Aiming at the problems existing in the above prior art, an externally open door lock for an elevator is provided, which can facilitate the detection and control of the opening and closing states of the door lock.

[0008] The utility model discloses an externally open door lock for an elevator, which includes a lock box, a lock rod, and a handle. A driver and a detection switch for detecting the opening and closing states are fixedly installed in the lock box. Both ends of the horizontally arranged lock rod extend out of both sides of the lock box respectively. The lock rod is successively provided with: a moving point seat at one end of the lock rod, a split pin at the rear end of the moving point seat, a downward rotating part, a spring compressed as the moving point seat retracts, and a pull cord device at the other end of the lock rod.

[0009] The downward rotating part is provided with a laterally protruding downward rotating part plane, and a groove is provided on the side of the downward rotating part plane; the driver is connected with an upward lifting part, and the upward lifting part is provided with an upward lifting connecting rod for being clamped into the groove; the detection switch is located above the upward lifting part, so that the upward lifting part touches the detection switch when moving upward; a coaxial rotating sleeve and a handle are respectively installed on the inner and outer sides of the lock box, and the handle is used to drive the rotating sleeve to rotate.

[0010] The detection switch and the driver are used for electrical connection with the external control cabinet.

[0011] When in the unlocked state, the driving lifting member drives the lower rotating member to rotate downward, causing the pressing handle to drive the rotating sleeve to rotate, and driving the lock rod to displace through pushing the lower rotating member to achieve unlocking; when in the locked state, the driving lifting member drives the lower rotating member to rotate upward, causing the pressing handle to drive the rotating sleeve to rotate but not contacting the lower rotating member to achieve locking.

[0012] Furthermore, the lock box includes a lock box bottom surface and a lock cover, and the lock box bottom surface is provided with a lock box bottom hole.

[0013] The driver and the detection switch are fixed on the lock box bottom surface; the rotating sleeve is installed in the lock box bottom hole, and a fixing hole matching with the rotating sleeve is opened on the lock cover for fixing the rotating sleeve.

[0014] Furthermore, a snap spring is further provided on the lock rod, and the lower rotating member is rotatably arranged on the lock rod through the snap spring.

[0015] Furthermore, the zip-lock device includes: a zip-lock member and an external unlocking member. Among them, the zip-lock member is fixedly connected to the other end of the lock rod, and the external unlocking member fixed on the door panel acts on the zip-lock member to drive the zip-lock member to move in the direction of retracting towards the moving point seat.

[0016] Furthermore, the driver includes: an electromagnet and a relay. Among them, the upper part of the electromagnet is connected to the lifting member, and the relay acts on the electromagnet to control the movement of the lifting member.

[0017] Furthermore, one end of the spring is fixed to the lock rod, and the other end acts on the inner wall of the lock box, so that the spring is compressed when the moving point seat retracts.

[0018] Furthermore, the moving point seat is pre-buried with a contact, and the door lock detection point is more intuitive, having the advantages of convenient production and assembly and convenient maintenance and adjustment.

[0019] The utility model has at least the following beneficial effects:

[0020] 1. The utility model adopts the structure of linkage of each component and two-way electromagnet drive to realize unlocking and locking, and detects the unlocking and locking states through the detection switch, with simple structure, convenient assembly and low cost.

[0021] 2. The door lock detection switch is changed from the traditional point contact to surface contact, increasing the contact area and reducing the requirement for the high matching precision between the door panel and the door frame.

[0022] 3. It is necessary to manually press the handle every time the door is opened or closed, reducing the failure rate of the door lock damaged caused by forced closing without pressing the handle.

[0023] Other beneficial effects of the utility model will be described in detail in the specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 is a three-dimensional structure diagram of an externally open door lock for an elevator disclosed in a preferred embodiment of the present invention.

[0026] Figure 2 is a schematic structural diagram of the externally open door lock for an elevator in a locked state disclosed in a preferred embodiment of the present invention.

[0027] Figure 3 is a schematic structural diagram of the externally open door lock for an elevator in an unlocked state disclosed in a preferred embodiment of the present invention.

[0028] Figure 4 is a structural diagram of the lock cover of the externally open door lock for an elevator disclosed in a preferred embodiment of the present invention.

[0029] Figure 5 is a structural diagram of the lock box of the externally open door lock for an elevator disclosed in a preferred embodiment of the present invention.

[0030] Figure 6 is a three-dimensional structure schematic diagram of the lower rotating part of the externally open door lock for an elevator disclosed in a preferred embodiment of the present invention.

[0031] Figure 7 is a three-dimensional structure schematic diagram of the lifting part of the externally open door lock for an elevator disclosed in a preferred embodiment of the present invention.

[0032] Among them, 1 is a moving point seat, 2 is a split pin, 3 is a lock rod, 4 is a circlip, 5 is a lower rotating part, 51 is the plane of the lower rotating part, 52 is a clamping groove, 6 is a spring, 7 is a detection switch, 8 is an external unlocking device, 9 is a pull rod, 10 is a handle, 11 is a relay, 12 is an electromagnet, 13 is a lifting part, 131 is the connecting rod of the lifting part, 14 is a rotating sleeve, 15 is a lock box, 151 is the bottom surface of the lock box, 152 is the bottom hole of the lock box, 16 is a lock cover, and 161 is a fixing hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be described in detail below. Apparently, the described embodiments are only part of the embodiments of the present utility model, rather than all of them. All other implementation manners obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts belong to the scope protected by the present utility model.

[0034] Embodiment

[0035] As Figures 1 to 7 shown, this embodiment discloses an externally open door lock for an elevator, and its structural parts mainly include: a moving point seat 1, a split pin 2, a lock rod 3, a snap ring 4, a lower rotating part 5, a spring 6, a detection switch 7, an external unlocking device 8, a pull rod 9, a handle 10, a relay 11, an electromagnet 12, an upward lifting part 13, a rotating sleeve 14, a lock box 15, and a lock cover 16.

[0036] Among them, the moving point seat 1, the split pin 2, the snap ring 4, the lower rotating part 5, and the spring 6 are respectively installed on the lock rod 3, and both ends extend out of the shell of the lock box 15. One end is connected to the pull rod 9. The upward lifting part 13 is installed on the electromagnet 12, and the connecting rod 131 of the upward lifting part is snapped into the groove 52. The electromagnet 12 and the detection switch 7 are fixed to the bottom surface 151 of the lock box. The rotating sleeve 14 is installed in the bottom hole 152 of the lock box. The lock cover 16 is provided with a fixing hole 161 that cooperates with the rotating sleeve 14 for fixing the rotating sleeve 14. The handle 10 has a mounting hole and is fixed to the lock box 15, and the external unlocking device 8 is fixed to the door panel.

[0037] The lock box 15 is equipped with the lock rod 3, the lower rotating part 5, the upward lifting part 13, the spring 6, the electromagnet 12, the rotating sleeve 14, the handle 10, etc. When the electromagnet 12 acts, it drives the lower rotating part 5 to act through the upward lifting part 13. Pressing the handle 10 down drives the rotating sleeve 14 to rotate. The rotating sleeve 14 contacts the lower rotating part 5 and drives the lock rod 3 to displace to unlock. Releasing the handle 10 causes the lock rod to return to its original position through the spring 6. When the electromagnet 12 acts again, it drives the lower rotating part 5 to act through the upward lifting part 13. Pressing the handle 10 down drives the rotating sleeve 14 to rotate. At this time, the rotating sleeve 14 has no contact with the lower rotating part 5, and the door cannot be opened at this time. Repeating the above actions can achieve unlocking and locking.

[0038] The working process of this embodiment is as follows: When the landing door is closed and the floor selection button is pressed, the external control system controls the intermediate relay to act. The power supply passes through the normally open contacts of the relay in the control cabinet and then through the normally open contacts of the relay 11 inside the lock box. The relay inside the lock box is controlled by the leveling inductor, causing the electromagnet 12 inside the lock box to act. The electromagnet 12 pops out and drives the upward lifting part 13 to move upward, touching the detection switch 7. The connecting rod 131 of the upward lifting part snapped into the groove 52 drives the lower rotating part 5 to return to its initial position. At this time, the plane 51 of the lower rotating part is parallel to the bottom surface 151 of the lock box. Even if the handle 10 is pressed down at this time, the door lock will not open, reaching the locked state.

[0039] When the flat floor inductor detects a signal, the control system controls the intermediate relay to act. The power supply passes through the normally open contacts of the relay in the control cabinet and then through the normally open contacts of relay 11 inside the lock box, causing the electromagnet 12 inside the lock box to act. The electromagnet 12 contracts, driving the lifting part 13 to move downward, and at the same time driving the rotating part 5 to rotate a certain angle. At this time, the handle 10 can be pressed down. Through the rotation of the rotating sleeve 14, the rotating part 5 is pushed and the lock rod 3 is driven to act, reaching the unlocking state.

[0040] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of changes or substitutions, which should all be covered within the protection scope of the present utility model.

Claims

1. An externally open door lock for an elevator, characterized in that It includes a lock box, a lock rod, and a handle. Inside the lock box, a driver and a detection switch for detecting the unlocking and locking states are fixedly installed. Both ends of the horizontally arranged lock rod extend out of both sides of the lock box. The lock rod is successively provided with: a moving point seat at one end of the lock rod, a split pin at the rear end of the moving point seat, a downward rotating member, a spring compressed when the moving point seat retracts, and a zip lock device at the other end of the lock rod. The downward rotating member is provided with a laterally protruding downward rotating member plane, and a groove is provided on the side of the downward rotating member plane. The driver is connected with a lifting member, and the lifting member is provided with a lifting connecting rod for being clamped into the groove. The detection switch is located above the lifting member so that the lifting member touches the detection switch when moving upward. A coaxial rotating sleeve and a handle are respectively installed on the inner and outer sides of the lock box, and the handle is used to drive the rotating sleeve to rotate. The detection switch and the driver are used for electrical connection with an external control cabinet. In the unlocking state, the driver drives the lifting member downward to drive the downward rotating member to rotate, so that pressing the handle drives the rotating sleeve to rotate, and the lock rod is displaced by pushing the downward rotating member to achieve unlocking. In the locking state, the driver drives the lifting member upward to drive the downward rotating member to rotate, so that pressing the handle drives the rotating sleeve to rotate but does not contact the downward rotating member to achieve locking.

2. The externally exposed door lock for an elevator according to claim 1, characterized in that, The lock box includes a lock box bottom surface and a lock cover, and the lock box bottom surface is provided with a lock box bottom hole. The driver and the detection switch are fixed to the lock box bottom surface. The rotating sleeve is installed in the lock box bottom hole, and a fixing hole matching with the rotating sleeve is opened on the lock cover for fixing the rotating sleeve.

3. The externally exposed door lock for an elevator according to claim 1, characterized in that, A circlip is also provided on the lock rod, and the downward rotating member is rotatably arranged on the lock rod through the circlip.

4. The externally open door lock for an elevator according to claim 1, characterized in that, The zip lock device includes: a zip lock member and an external unlocking device. Among them, the zip lock member is fixedly connected to the other end of the lock rod, and the external unlocking device fixed to the door panel acts on the zip lock member to drive the zip lock member to move in the direction of retracting towards the moving point seat.

5. The externally openable door lock for an elevator according to claim 1, characterized in that, The driver includes: An electromagnet and a relay. Among them, the electromagnet is connected to the lifting member above, and the relay acts on the electromagnet to control the movement of the lifting member.

6. The externally open door lock for an elevator according to claim 1, characterized in that, One end of the spring is fixed to the lock rod, and the other end acts on the inner wall of the lock box so that the spring is compressed when the moving point seat retracts.

7. The external open door lock for an elevator according to claim 1, characterized in that, The moving point seat is embedded with a contact.

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