Elevator landing door lock

Abstract

The utility model discloses an elevator landing door lock, which comprises a main lock, a middle door lock and an auxiliary lock, the middle door lock comprises a bottom plate and a fixed seat, a combined contact is arranged in the fixed seat and comprises two left contacts and two right contacts, the left contacts close to the rear side of the fixed seat are electrically connected with the right contacts, and the left contacts close to the rear side of the fixed seat are electrically connected with the right contacts close to the rear side of the fixed seat. The main lock is provided with two main contacts which are electrically connected with each other, the two main contacts are respectively matched and contacted with the two right contacts to conduct electricity, the auxiliary lock is provided with two auxiliary contacts which are electrically connected with each other, and the two auxiliary contacts are respectively matched and contacted with the two left contacts to conduct electricity. According to the utility model, the main lock and the auxiliary lock form a conduction loop through the combined contacts and the control detection circuit, and the combined contacts are arranged in the same fixed seat, so that the purposes of reducing middle wiring and reducing failure rate are achieved.

Description

Technical Field

[0001] The utility model relates to the field of elevators, and particularly relates to an elevator landing door lock. Background Art

[0002] The opening and closing of the elevator landing door are realized by the opening blades installed on the car door. Each landing door is equipped with a door lock. After the landing door is closed, the mechanical lock hook of the door lock meshes, and at the same time, the electrical interlock contact switch on the landing door closes, and the elevator control circuit is connected. Only then can the elevator start and run. The contact switch can ensure that the elevator cannot operate normally when the door is not safely closed in place or not locked properly.

[0003] There are various styles of landing door locks in the prior art. The performance of the main contacts in the landing door lock is particularly important. Most of the existing landing door locks cannot meet the IP2X requirements. With the implementation of GB / T7588.1-2020, in the basic protection (protection against direct contact) of Clause 5.10.1.2.2, it is stipulated that "in the hoistway, machine space, and pulley room, protective enclosures (covers) should be used to prevent direct contact with electrical equipment. The protective enclosures (covers) used should have a protection level not lower than IP2X (see GB / T4208)". The original landing door locks that do not meet the IP level will no longer be usable.

[0004] Although there are some landing door locks in the prior art that meet the IP2X protection level, both the main and auxiliary contacts adopt a split structure. Two contact switches are used to connect to the contact points of the main contact and the auxiliary contact respectively, and the two contact switches are connected by a short wire and a terminal block. The process is complex and the failure rate is high. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an elevator landing door lock. The main lock and the auxiliary lock of the landing door lock form a conduction loop with the control and detection circuit through a combined contact, and the combined contact is arranged in the same fixed seat, so as to achieve the purpose of reducing intermediate wiring and reducing the failure rate.

[0006] The technical solution adopted by the utility model to solve the above problems is:

[0007] An elevator landing door lock includes a main lock, an intermediate door lock, and an auxiliary lock. The intermediate door lock includes a bottom plate and a fixed seat. A combined contact is arranged in the fixed seat. The combined contact includes two left contacts and two right contacts. The left contact and the right contact near the rear side of the fixed seat are electrically connected. Two main contacts that are electrically connected to each other are arranged on the main lock, and the two main contacts are respectively in conductive contact with the two right contacts. Two auxiliary contacts that are electrically connected to each other are arranged on the auxiliary lock, and the two auxiliary contacts are respectively in conductive contact with the two left contacts.

[0008] In the above technical solution, preferably, the main lock includes a hanging plate and a locking hook. The main contact is fixed to the left end of the locking hook. The right end of the locking hook is rotatably arranged on the hanging plate. An auxiliary hook that cooperates with and is clamped by the locking hook is arranged at the lower end of the bottom plate.

[0009] In the above technical solution, preferably, a left conductive sheet, a right conductive sheet, and a rear conductive sheet are arranged in the fixed seat. The left conductive sheet, the right conductive sheet, and the rear conductive sheet all have a certain elasticity. The two left contacts are respectively arranged on the left conductive sheet and the rear conductive sheet. The left ends of the left conductive sheet and the rear conductive sheet are both in a vertical state. The two right contacts are respectively arranged on the right conductive sheet and the rear conductive sheet. The right ends of the right conductive sheet and the rear conductive sheet are both in a horizontal state. The left conductive sheet and the right conductive sheet are both fixed to the fixed seat by screws. A jack for inserting a wire, which is adapted to the position of the screw, is provided on the upper side of the fixed seat.

[0010] In the above technical solution, preferably, the right contact has a square arc shape, and the upper side surface of the right contact is an arc surface.

[0011] In the above technical solution, preferably, two gourd-shaped mounting holes are provided on the fixed seat.

[0012] In the above technical solution, preferably, a dust-falling hole is provided on the fixed seat below the right contact.

[0013] Compared with the prior art, the present utility model has the following advantages and effects:

[0014] In the present utility model, the main contact of the main lock and the auxiliary contact of the auxiliary lock form a conduction loop with the control detection circuit through the combined contact, and the combined contact is arranged in the fixed seat. Therefore, the volume of the fixed seat and the combined contact in the present utility model is small, the installation space of the contact switch can be optimized, and the main contact and the auxiliary contact do not require additional short wires and terminal blocks for electrical connection, reducing the intermediate wiring link, thereby reducing the failure rate and improving the safety of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the elevator landing door lock according to an embodiment of the present utility model.

[0016] Figure 2 is Figure 1 a front view of the internal structure of the middle door lock in

[0017] Figure 3 is Figure 2 a top view of

[0018] Figure 4 is Figure 2 a schematic diagram of the internal structure of the back of the middle door lock in

[0019] Among them, there are a main lock 1, a main contact 11, a hanging plate 12, a locking hook 13, an intermediate door lock 2, a bottom plate 21, a fixed seat 22, a combined contact 23, a left contact 24, a right contact 25, an attachment hook 26, a left conductive sheet 27, a right conductive sheet 28, a rear conductive sheet 29, a screw 30, a jack 31, a mounting hole 32, a dust fall hole 33, a secondary lock 4, and a secondary contact 41. Specific embodiments

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, and the present invention is not limited to the following embodiments.

[0021] See Figures 1-4 , an elevator landing door lock in this embodiment includes a main lock 1, an intermediate door lock 2, and a secondary lock 4. The intermediate door lock 2 includes a bottom plate 21 and a fixed seat 22. A combined contact 23 is arranged in the fixed seat 22. The combined contact 23 includes two left contacts 24 and two right contacts 25. The left contact 24 and the right contact 25 near the rear side of the fixed seat 22 are electrically connected. Two mutually electrically connected main contacts 11 are arranged on the main lock 1, and the two main contacts 11 are respectively in contact and conductive cooperation with the two right contacts 25. Two mutually electrically connected secondary contacts 41 are arranged on the secondary lock 4, and the two secondary contacts 41 are respectively in contact and conductive cooperation with the two left contacts 24.

[0022] When the present invention is installed and used, the main lock 1 and the secondary lock 4 are respectively fixed on two oppositely moving landing doors of the elevator, and the intermediate door lock 2 is fixed above the elevator landing door and does not move with the landing door. When the elevator landing door is closed, the main lock 1 and the secondary lock 4 move simultaneously closer to the intermediate door lock 2, so that the main contacts 11 and the right contacts 25 are in contact and electrically connected, and the secondary contacts 41 and the left contacts 24 are in contact and electrically connected. At the same time, a control detection circuit of the elevator landing door is electrically connected to the left contact 24 and the right contact 25 near the front side of the fixed seat 22. The control detection circuit forms a conduction loop through the combined contact 23, the main contact 11, and the secondary contact 41, so as to be able to recognize that both landing doors of the elevator are closed, improving the safety during the operation of the elevator.

[0023] In this embodiment, the control detection circuit adopts a commonly used elevator landing door control detection circuit in the field, which is a conventional technical means in the field and will not be explained in detail in this specification.

[0024] Since the main contact 11 of the main lock 1 and the secondary contact 41 of the secondary lock 4 in the present utility model form a conduction loop with the control detection circuit through the combined contact 23, and the combined contact 23 is arranged in the fixed seat 22, compared with the existing method of using two contact switches to be respectively connected to the contact points of the main contact 11 and the secondary contact 41, the volume of the fixed seat 22 and the combined contact 23 in the present utility model is smaller, which can optimize the installation space of the contact switch, and the main contact 11 and the secondary contact 41 do not require additional short connection wires and terminal blocks for electrical connection, reducing the intermediate wiring link, thereby reducing the failure rate and improving the safety of the present utility model.

[0025] See Figure 1 , the main lock 1 includes a hanging plate 12 and a locking hook 13, the main contact 11 is fixed at the left end of the locking hook 13, the right end of the locking hook 13 is rotatably arranged on the hanging plate 12, and an auxiliary hook 26 that cooperates with and is clamped by the locking hook 13 is arranged at the lower end of the bottom plate 21.

[0026] When the elevator landing door is closed, the main lock 1 moves with the landing door so that the locking hook 13 contacts the auxiliary hook 26, and after the locking hook 13 rotates, it resets and is clamped on the auxiliary hook 26. At this time, the landing door cannot be opened by external force, improving the safety when the elevator is moving; when the elevator landing door needs to be opened, the locking hook 13 rotates under the action of the door knife on the elevator car and separates from the auxiliary hook 26. At this time, the landing door can be driven to move to open the landing door.

[0027] See Figures 2-4 , the fixed seat 22 is provided with a left conductive sheet 27, a right conductive sheet 28 and a rear conductive sheet 29. The left conductive sheet 27, the right conductive sheet 28 and the rear conductive sheet 29 all have a certain elasticity. The two left contacts 24 are respectively arranged on the left conductive sheet 27 and the rear conductive sheet 29. The left ends of the left conductive sheet 27 and the rear conductive sheet 29 are both in a vertical state. The two right contacts 25 are respectively arranged on the right conductive sheet 28 and the rear conductive sheet. The right ends of the right conductive sheet 28 and the rear conductive sheet 29 are both in a horizontal state. The left conductive sheet 27 and the right conductive sheet 28 are both fixed on the fixed seat 22 by screws 30. Insertion holes 31 for wires to be inserted and adapted to the positions of the screws 30 are opened on the upper side of the fixed seat 22.

[0028] Since the secondary lock 4 moves linearly left and right, the left ends of the left conductive sheet 27 and the rear conductive sheet 29 are set vertically. When the secondary lock 4 moves to the right, the secondary contact 41 is pressed against the left contacts 24 of the left conductive sheet 27 and the rear conductive sheet 29 to achieve electrical connection; when the main lock 1 moves to the left and is latched on the attachment hook 26 through the locking hook 13, the locking hook 13 will rotate and reset, so the main contact 11 provided on the locking hook 13 will also rotate and reset together. Therefore, the right ends of the right conductive sheet 28 and the rear conductive sheet 29 are set horizontally, which is convenient for the main contact 11 to rotate and reset and then press against the right contacts 25 of the right conductive sheet 28 and the rear conductive sheet 29 to achieve electrical connection. The left conductive sheet 27, the right conductive sheet 28, and the rear conductive sheet 29 all have a certain elasticity, so that when the secondary contact 41 and the main contact 11 move and press against the left contact 24 and the right contact 25, they can have a buffering effect, reducing the probability of the left conductive sheet 27, the right conductive sheet 28, and the rear conductive sheet 29 being damaged by impact when the landing door is frequently opened and closed during use, and extending the service life of the present utility model.

[0029] See Figure 2 , Figure 4 , the right contact 25 adopts a square arc shape, and the upper side of the right contact 25 is an arc surface.

[0030] The upper side of the right contact 25 is used to contact and electrically connect with the main contact 11. Therefore, setting the upper side of the right contact 25 as an arc surface can increase the area of the contactable surface on the right contact 25, so that the connection with the main contact 11 is more stable. At the same time, the arc surface can also reduce the probability of dust accumulating on the right contact 25, reducing the probability that the main contact 11 and the right contact 25 cannot be electrically connected due to dust blockage, and ensuring the normal operation of the present utility model.

[0031] See Figure 2 , Figure 4 , two gourd-shaped mounting holes 32 are provided on the fixed seat 22, which can meet the installation requirements of multiple sizes, thereby increasing the installation application range when the fixed seat 22 is installed above the elevator landing door.

[0032] See Figure 2 , Figure 4 , a dust falling hole 33 is provided on the fixed seat 22 below the right contact 25.

[0033] When the main contact 11 moves and presses against the right contact 25, a collision will occur between the main contact 11 and the right contact 25, so that the dust on the right contact 25 can be shaken off. The fallen dust can fall out of the fixed seat 22 through the dust falling hole 33, reducing the risk of dust accumulating in the fixed seat 22 and affecting the operation of the right contact 25.

[0034] The above content described in this specification is only an illustrative example of the present utility model. Those skilled in the technical field to which the present utility model pertains can make various modifications or supplements to the specific embodiments described, or use similar methods for substitution, as long as they do not deviate from the content of this specification of the present utility model or exceed the scope defined by this claim book, and shall fall within the protection scope of the present utility model.

Claims

1. An elevator door lock, characterized in that: It includes a main lock, an intermediate door lock and a secondary lock. The intermediate door lock includes a base plate and a fixing seat. A combination contact is arranged in the fixing seat. The combination contact includes two left contacts and two right contacts. The left contact and the right contact near the rear side of the fixing seat are electrically connected. The main lock is provided with two main contacts electrically connected to each other, and the two main contacts are respectively matched with the two right contacts for electrical contact. The secondary lock is provided with two secondary contacts electrically connected to each other, and the two secondary contacts are respectively matched with the two left contacts for electrical contact.

2. The elevator door lock according to claim 1, characterized in that: The main lock comprises a hanging plate and a lock hook, the main contact is fixed on the left end of the lock hook, the right end of the lock hook is rotatably arranged on the hanging plate, and the lower end of the bottom plate is provided with an attached hook that cooperates with the lock hook.

3. The elevator door lock according to claim 1, characterized in that: A left conductive sheet, a right conductive sheet and a rear conductive sheet are arranged in the fixing seat, and the left conductive sheet, the right conductive sheet and the rear conductive sheet all have a certain elasticity. The two left contacts are respectively arranged on the left conductive sheet and the rear conductive sheet, and the left ends of the left conductive sheet and the rear conductive sheet are both in a vertical state. The two right contacts are respectively arranged on the right conductive sheet and the rear conductive sheet, and the right ends of the right conductive sheet and the rear conductive sheet are both in a horizontal state. The left conductive sheet and the right conductive sheet are both fixed to the fixing seat by screws, and a socket for inserting a wire that is adapted to the position of the screw is opened on the upper side of the fixing seat.

4. The elevator door lock according to claim 1, characterized in that: The right contact point adopts a square arc shape, and the upper side surface of the right contact point is a circular arc surface.

5. The elevator door lock according to claim 1, characterized in that: The fixing seat is provided with two gourd-shaped mounting holes.

6. The elevator door lock according to claim 1, characterized in that: A dust collecting hole begins to be formed on the fixing seat below the right contact.

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