CN106315325B

CN106315325B - Mechanical blocking device and locking device with same

Info

Publication number: CN106315325B
Application number: CN201510358718.2A
Authority: CN
Inventors: 郑旭祎; 吴昊晟; 璩菲远
Original assignee: ThyssenKrupp Elevator Shanghai Co Ltd
Current assignee: Tisheng home elevator (Shanghai) Co.,Ltd.
Priority date: 2015-06-25
Filing date: 2015-06-25
Publication date: 2020-06-23
Anticipated expiration: 2035-06-25
Also published as: CN106315325A

Abstract

The invention provides a mechanical blocking device, a locking device with the mechanical blocking device and a method for safely locking a home elevator. The mechanical blocking device (9) for the elevator car comprises an annular iron ring (10) fixed on a damper plate and a chain (4) penetrating through the annular iron ring (10), wherein one end of the chain (4) is provided with a lifting hook (2) used for hooking the elevator car during installation and/or maintenance; the other end is provided with quick shackle of chain (5), is used for lifting hook (2) are held and are adjusted behind the elevator car the length of chain (4) is locked chain (4) prevents the elevator car falls. The mechanical blocking device, the locking device with the mechanical blocking device and the method for safely locking the household elevator, which are provided by the invention, have the advantages of compact structure, convenience in installation and high safety, and greatly ensure the safety of elevator installation and maintenance personnel during well operation.

Description

Mechanical blocking device and locking device with same

Technical Field

The present invention relates to a mechanical blocking device, in particular a locking device for a home elevator or a villa elevator with the mechanical blocking device and a method for safely locking a home elevator.

Background

At present, in order to utilize the space to the maximum extent, the home elevator generally adopts a backpack structure, and has the advantages that the structure is very compact, and only a shallow pit and a lower top floor space are needed; it is precisely because of this compact structure that certain safety risks can also be brought to the installation and subsequent maintenance of the elevator.

For example, when installing an elevator at the top of a hoistway or maintaining an elevator, if a wire rope suspending an elevator car looses or breaks, the elevator may slip or even fall. In addition, GB/T21739-2008 home elevator manufacturing and installation code also puts corresponding requirements on safety problems in elevator installation and maintenance. Therefore, it is urgently required to develop a blocking device or a locking device for a home elevator, which prevents an accidental fall of a car, thereby protecting the safety of installation and maintenance personnel.

Disclosure of Invention

The invention aims to solve the technical problem of providing a mechanical blocking device with a novel structure for a home elevator, a locking device with the mechanical blocking device and a method for safely locking the home elevator, and solves the problems that the available space of the conventional backpack type design of the home elevator is small, and the top of a shaft is lack to prevent the car from accidentally falling, so that more perfect safety guarantee is provided for installation and maintenance personnel.

To achieve the object, a preferred embodiment of the invention provides a mechanical blocking device 9 for an elevator car. The mechanical blocking device 9 comprises an annular iron ring 10 positioned on the baffle plate and a chain 4 penetrating through the annular iron ring 10, and one end of the chain 4 is provided with a lifting hook 2 for hooking the elevator car during installation and/or maintenance; the other end of chain 4 is provided with the quick shackle of chain 5, is used for the lifting hook 2 adjusts after holding elevator car the length of chain 4 is locked the chain 4 prevents elevator car falls.

In a further preferred scheme provided by the invention, a D-shaped shackle 6 is arranged on a car portal frame 8 of the elevator car and is used for being matched with the lifting hook 2 to pull the elevator car.

In a further preferred embodiment of the present invention, the mechanical blocking device includes at least two of the annular iron rings 10.

In a further preferred embodiment of the invention, the dimensions of the hook 2 and the chain 4 can be determined by the maximum weight to be carried.

In another aspect, the present invention provides a locking device for a home elevator. The locking means comprises any of the above mentioned mechanical blocking means.

In a further preferred embodiment of the invention, the locking device also comprises an electrical component which is connected to the safety circuit to prevent movement of the elevator car when the locking device is in the active state.

In a further preferred embodiment of the invention, the electrical components comprise a hook mounting plate 1, a safety circuit conducting plate 3, and a safety circuit contact switch 7, wherein the hook 2 is suspended from the hook mounting plate 1 during normal operation of the elevator, and the safety circuit conducting plate 3 presses against the safety circuit contact switch 7.

In a further preferred embodiment of the invention, when the hook 2 is disengaged from the hook mounting plate 1, the safety circuit conducting plate 3 is disengaged from the safety circuit contact switch 7 to open the elevator safety circuit, further preventing movement of the elevator car electrically.

In a further preferred aspect of the present invention, the electrical component is disposed obliquely above the mechanical blocking device.

In a further preferred embodiment of the present invention, the safety circuit conduction plate 3 is pressed against the safety circuit contact switch 7 by gravity to conduct the elevator safety circuit.

Yet another aspect of the present invention provides a method of securely locking a home elevator. The method employs any one of the mechanical blocking devices or the locking device described above to mechanically prevent the elevator car from falling and to electrically further arrest elevator car movement.

The mechanical blocking device, the locking device with the mechanical blocking device and the method for safely locking the household elevator, which are provided by the invention, have compact structure, fully utilize limited space, ensure double insurance of mechanical parts and electrical parts, and greatly ensure the safety of elevator installation and maintenance personnel.

Drawings

Fig. 1 shows a schematic view of the overall structure of a lock device provided by the present invention with a mechanical blocking device;

fig. 2 shows a schematic view of the electrical components when the lock device is in the unlocked state; and

fig. 3 shows a schematic view of a locking state of the locking device shown in fig. 1 when the car is prevented from being accidentally dropped.

Shown in the figure: 1-hook placing plate, 2-hook, 3-safety loop conducting plate, 4-chain, 5-chain quick shackle, 6-D shackle, 7-safety loop contact switch, 8-elevator car portal frame, 9-mechanical blocking device and 10-annular iron ring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will recognize that the scope of the present invention as claimed is not limited to the preferred embodiments. Various changes and modifications to the embodiments described herein will be apparent to those skilled in the art without departing from the spirit and scope of the invention, and it is intended to cover in the appended claims all such modifications and changes as fall within the true spirit and scope of the invention.

As shown in fig. 1, the present invention provides a lock device including an electric component and a mechanical component, wherein the electric component is disposed entirely above the mechanical component. Whereas most of the features of the mechanical parts such as fixing plate, stopper plate, microswitch, limit switch, fixing device, dead axle, etc. have been disclosed in detail in an invention owned by the present company, namely a home elevator safety barrier (patent No. ZL201210066476.6, granted date: 2014.05.14), the same parts involved in the present invention can be referred to the description of the patent of the invention, and only the improvement points related to the locking device provided by the present invention will be described in detail. Said mechanical parts comprise a mechanical blocking means 9 and at least two annular iron rings 10 arranged on the check plate.

When installation or dimension guarantor elevator, chain 4 passes annular iron ring and one end are provided with the lifting hook that is used for pulling elevator car, and the chain that the other end set up is broken out 5 fast for lifting hook 2 is in adjust the length of chain 4 and lock behind the elevator car 4 prevents elevator car falls and prevents that the car is unexpected to slide or fall.

As shown in fig. 2, the electrical components of the locking device use a safety circuit to prevent the elevator car from falling. Specifically, the electrical components include a hook mounting plate 1, a safety circuit conduction plate 3, and a safety circuit contact switch 7.

Wherein, the lifting hook placing plate 1 is fixed on a wall surface bearing wall where the backpack type guide rail is positioned, and plays a role in hanging the lifting hook 2. Preferably, the hook mounting plate is mounted diagonally above the mechanical blocking means 9.

The hook 2 is suspended from the hook mounting plate 1 during normal elevator operation.

The preferred stainless steel of safety circuit conduction board 3, it is installed and is detained at the safety of lifting hook 2, and is preferred, the safety circuit conduction board adopts the mode of rivet connection to fix.

A safety circuit contact switch 7 is mounted on the hook mounting plate 1 and is connected into the elevator safety circuit. The safety loop conducting plate 3 is pressed on the safety loop contact switch 7 through gravity, so that an elevator safety loop is conducted, and normal operation of an elevator is guaranteed.

When installing or maintaining the elevator, e.g. when the elevator car moves to a position close to the top floor, the hook 2 is removed from the hook mounting plate 1, as shown in fig. 3, whereupon the safety circuit conducting plate 3 disengages the safety circuit contact switch 7, thereby opening the safety circuit of the elevator and electrically blocking the movement of the car.

Further, the hook 2 hooks the elevator car, especially by means of a D-shackle 6 mounted on the elevator car gantry 8. By locking the chain quick shackle 5, the chain 4 with the adjusted length passes through the two annular iron rings 10 to form a closed loop, so that the chain 4 is in a tightened state. In this case, the elevator car is suspended on the mechanical blocking device 9 by the chain 4, ensuring that the elevator cannot accidentally fall in any situation, thus ensuring the safety of the installation and maintenance personnel.

It should be noted that, after the elevator is installed or maintained, the chain quick shackle 5 is opened, the hook 2 can be taken out of the D-shaped shackle 6 and hung on the hook mounting plate 1 of the locking device again, and the safety circuit conduction plate 3 is ensured to conduct the safety circuit contact switch 7, so that the elevator returns to a normal operation state.

Preferably, the specifications of the chain 4 and hook 2 may be determined by the maximum weight to be carried.

Compared with the prior art, the hall door lock and the elevator system thereof provided by the invention have the following advantages:

1. the mechanical blocking device, the locking device with the mechanical blocking device and the method for safely locking the home elevator are compact in structure and suitable for the compact and small size requirement of the home elevator or villa elevator, for example, the size of the whole locking device is only 190mm × 120mm × 50mm, and the locking device is only arranged near a bearing point at the top of a hoistway, so that the space is utilized to the utmost extent, and no assembly conflict exists with other elevator components.

2. The mechanical blocking device, the locking device with the mechanical blocking device and the method for safely locking the household elevator are convenient to install, expansion anchor bolts can be used for fixing on concrete wall surfaces, opposite-penetrating bolts can be used for fixing in steel structure shafts, the opposite-penetrating bolts can also be welded on steel structures, and the installation mode is various and convenient.

3. The mechanical blocking device provided by the invention has high safety, and particularly, the locking device with the mechanical blocking device has double insurance of mechanical parts and electrical parts, so that the safety of elevator installation and maintenance personnel is greatly ensured.

Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will recognize that the scope of the present invention as claimed is not limited to the preferred embodiments. Various changes and modifications to the embodiments described herein will be apparent to those skilled in the art without departing from the spirit and scope of the invention, and it is intended to cover in the appended claims all such modifications and changes as fall within the true spirit and scope of the invention.

Claims

1. A locking device for home elevators, comprising a mechanical blocking device (9) for the elevator car, said mechanical blocking device (9) comprising an annular iron ring (10) fixed on a check plate and a chain (4) passing through said annular iron ring (10), one end of said chain (4) being provided with a hook (2) for hooking the elevator car when installing and/or maintaining the elevator; the other end of the chain (4) is provided with a chain quick shackle (5) which is used for adjusting the length of the chain (4) and locking the chain (4) after the lifting hook (2) pulls the elevator car so as to prevent the elevator car from falling; the locking device further comprises an electrical component which is switched into the safety circuit to prevent the elevator car from moving when the locking device is in the operating state; the method is characterized in that: the electrical component comprises a hook mounting plate (1), a safety circuit conducting plate (3), a safety circuit contact switch (7), wherein the hook (2) is hung on the hook mounting plate (1) during normal operation of the elevator, and the safety circuit conducting plate (3) presses on the safety circuit contact switch (7).

2. A device according to claim 1, characterised in that: and a D-shaped shackle (6) is arranged on a car portal frame (8) of the elevator car and is used for being matched with the lifting hook (2) to hold the elevator car.

3. A device according to claim 1, characterised in that said mechanical blocking means comprises at least two said annular eyelets (10).

4. A lock device according to any one of claims 1 to 3, wherein: the size of the hook (2) and/or the chain (4) may be determined by the maximum weight to be carried.

5. A device according to claim 1, characterised in that: when the hook (2) is disengaged from the hook mounting plate (1), the safety circuit conduction plate (3) is disengaged from the safety circuit contact switch (7) to break the elevator safety circuit, further preventing the elevator car from moving electrically.

6. A device according to claim 1 or 5, characterised in that: the electrical component is disposed diagonally above the mechanical blocking device.

7. A device according to claim 1, characterised in that: the safety loop conducting plate (3) is pressed on the safety loop contact switch (7) through gravity to conduct the elevator safety loop.

8. A method of safely locking a home elevator, characterised in that the method mechanically prevents the elevator car from falling and electrically further prevents the elevator car from moving, using a locking device according to any one of the preceding claims.