A stopping device for shallow pit elevator

Abstract

The present invention discloses a stopping device for a shallow pit elevator, comprising: a bottom plate; a lower box cover fixedly mounted on the bottom plate; an upper box cover hinged on the lower box cover, wherein the upper box cover and the lower box cover are in an open state when the elevator is in use, and the upper box cover and the lower box cover are in a closed state and locked when the elevator is under maintenance; a column, wherein the bottom of the column is fixed on the upper box cover and follows the turning of the upper box cover; when the elevator is in use, the column is in a non-vertical state; when the elevator is under maintenance, the column is in a vertical state; and a buffer, wherein the buffer is mounted on the column. The advantage of the present invention is that the column can achieve self-locking when it is erected, has a fool-proof effect, and does not have the risk of erroneous operation due to forgetting the operating steps.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and in particular to a stopping device for a shallow pit elevator capable of significantly reducing the depth of the elevator pit. Background Art

[0002] Current conventional elevators require a certain amount of building space. In addition to the shaft necessary for the operation of the elevator, there must also be a machine room and a pit. Generally speaking, in order to install and maintain the elevator, ensure the working space and meet the requirements of safe havens, the pit must have a certain depth, which requires corresponding civil engineering construction and material investment.

[0003] For installing elevators, a separate shaft needs to be built. If there are underground pipelines within a certain depth directly below the excavation range of the shaft pit, and the elevator pit depth is required to be deeper, the underground pipelines need to be relocated or other equivalent measures need to be taken, which will inevitably increase the project cost and prolong the construction period. If the position below the shaft is not suitable for deep excavation, it will make it impossible to install an elevator.

[0004] Therefore, how to efficiently utilize building space, especially how to reduce the excavation depth of the pit when installing elevators, reduce the relocation of underground pipelines, and reduce the impact on the original building foundation, is an urgent problem that needs to be solved. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a stopping device for shallow pit elevators in view of the above-mentioned problems caused by the need to dig a deeper pit for installing an elevator, which can be overturned when the elevator is in use and can be erected when the elevator is repaired. While meeting the requirements of relevant elevator regulations, the depth of the pit for installing the elevator is greatly reduced, reducing the amount of excavation of the elevator pit and the impact on underground pipelines and building foundations. The economic benefits are significant.

[0006] The technical problem to be solved by the present invention can be achieved by the following technical solutions:

[0007] A stopping device for a shallow pit elevator, comprising:

[0008] Base plate;

[0009] A lower box cover fixedly mounted on the bottom plate;

[0010] An upper box cover hinged on the lower box cover, the upper box cover and the lower box cover are hinged via a rotating shaft, and can be turned up and down around the rotating shaft, and the upper box cover and the lower box cover are locked by a locking device when they are in a closed state;

[0011] A column, the bottom of which is fixed on the upper box cover and follows the turning of the upper box cover; when the elevator is in use, the column is horizontal; when the elevator is under maintenance, the column is vertical;

[0012] A buffer is installed on the column.

[0013] In a preferred embodiment of the present invention, during maintenance of the elevator, the upper box cover and the lower box cover are locked by a locking device to ensure that the column can be reliably kept in a vertical state.

[0014] In a preferred embodiment of the present invention, the locking device includes a locking rod, a shaft and a spring, the locking rod is arranged on the lower box cover through the shaft, one end of the spring acts on the locking rod, and the other end acts on the lower box cover; when the elevator is in use, the locking rod is in an unlocked state to unlock the upper box cover; when the elevator is being overhauled, the locking rod is in a locked state to lock the upper box cover and the lower box cover together to ensure that the column is reliably kept in a vertical state.

[0015] In a preferred embodiment of the present invention, the shaft is a torsion spring shaft, the spring is a torsion spring, and the torsion spring is wound on the torsion spring shaft.

[0016] In a preferred embodiment of the present invention, the lower box cover at least has a box bottom and a lower box side edge folded upward from one side edge of the box bottom and extending upward, a waist-shaped hole is provided on the lower box side edge, and the end of the locking rod extends from the inner side of the lower box side edge through the waist-shaped hole to the outer side of the lower box side edge; the upper box cover at least has a box top and an upper box side edge folded downward from one side edge of the box top and extending downward, a locking groove and an unlocking notch connected to each other are provided on the upper box side edge, when the locking rod is in an unlocked state, the end of the locking rod is retreated from the locking groove into the unlocking notch to unlock the upper box cover; when the locking rod is in a locked state, the end of the locking rod enters the locking groove from the unlocking notch to lock the upper box cover and the lower box cover together.

[0017] In a preferred embodiment of the present invention, an inclined surface for guiding the locking rod into the locking groove is provided at the bottom of the locking groove, and the locking rod is guided into the locking groove through the inclined surface.

[0018] In a preferred embodiment of the present invention, the rotating shaft passes through the side edge of the lower box and the side edge of the upper box, so that the upper box cover is hinged to the lower box cover.

[0019] In order to sense the state of the column, at least one electrical switch is also included. The electrical switch is used to sense the state of the column; the electrical switch is connected to the elevator control system signal.

[0020] In a preferred embodiment of the present invention, the electrical switch is mounted on the lower box cover or the upper box cover or the bottom plate.

[0021] In a preferred embodiment of the present invention, there are two electrical switches, both of which are installed on the upper box cover. One electrical switch is used to sense that the column is in a horizontal state, and the other electrical switch is used to sense that the column is in a vertical state. The state in which the column is neither in a horizontal state nor in a vertical position is called an intermediate state.

[0022] Due to the adoption of the above technical solution, the advantage of the present invention is that the column can achieve self-locking when erected, has a fool-proof effect, and does not cause the risk of erroneous operation due to forgetting the operating steps.

[0023] The present invention provides two levels of safety protection for the elevator pit space. First, electrical safety protection. After the stop device is activated, the electrical switch is triggered and the elevator can only be inspected and operated. The lowest position of the inspection and operation is controlled by the system setting. Second, mechanical safety protection. When the electrical safety protection system fails, the car that continues to descend will be stopped by the present invention to ensure the safety of the pit space. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the state of the stopping device of the shallow pit elevator of the present invention when the upper box cover is turned up.

[0025] Figure 2 It is a schematic diagram of the state of the stopping device of the shallow pit elevator of the present invention after the upper box cover is completely flipped up.

[0026] Figure 3 The schematic diagram of the stopping device of the shallow pit elevator of the present invention viewed from one direction before the upper box cover enters the locking state.

[0027] Figure 4 It is a schematic diagram of the stopping device of the shallow pit elevator of the present invention viewed from another direction before the upper box cover enters the locking state.

[0028] Figure 5 The schematic diagram of the stopping device of the shallow pit elevator of the present invention viewed from one direction after the upper box cover is locked.

[0029] Figure 6 It is a schematic diagram of the stopping device of the shallow pit elevator of the present invention viewed from another direction after the upper box cover is locked. DETAILED DESCRIPTION

[0030] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] Referring to the accompanying drawings, a stopping device for a shallow pit elevator is shown in the drawings, comprising a base plate 10, which is roughly a rectangular plate, and the four corners of the base plate 10 are installed on the pit bottom ground of the pit (not shown in the drawings) through expansion bolts 11.

[0032] The lower box cover 20 has a box bottom 21 and lower box sides 22 symmetrically arranged on the box bottom 21 and folded upward and extending upward, and a waist-shaped hole 22a is provided on each lower box side 22. The box bottom 21 is fixed to the bottom plate 10 by welding. Of course, the lower box cover 20 can also be set in other structural forms as needed.

[0033] The upper box cover 30 has a box top 31 and upper box sides 32 symmetrically arranged with two side edges folded downward and extending downward from the box top 31, and each upper box side 32 is provided with a locking groove 32a and an unlocking notch 32b that are connected to each other, and a slope 32c for the locking rod to be introduced into the locking groove 32a is provided at the bottom of the locking groove 32a. Of course, the upper box cover 30 can also be set in other structural forms as needed.

[0034] The rotating shaft 40 passes through the two lower box side edges 22a and the two upper box side edges 32a, so that the upper box cover 30 is hinged on the lower box cover 20. The two ends of the rotating shaft 40 are axially limited by cotter pins 41. The upper box cover 30 can be turned up and down around the rotating shaft 40, and the upper box cover 30 and the lower box cover 20 are locked by a locking device 50 when they are in a closed state. Of course, the rotating shaft 40 can also be replaced by other hinge mechanisms.

[0035] The locking device 50 includes a locking rod 51, a shaft and a spring. The shaft is a torsion spring shaft 52, and the spring is a torsion spring 53. Of course, the spring can also be set as a tension spring or a compression spring as needed.

[0036] The middle position of the lock rod 51 is axially arranged on the bottom 21 of the lower box cover 20 through the torsion spring shaft 52, and the lock rod 51 can rotate around the torsion spring shaft 52. The torsion spring 53 is wound on the torsion spring shaft 52, one end of the torsion spring 53 acts on the lock rod 51, and the other end acts on the bottom 21 of the lower box cover 20. When the lock rod 51 is unlocked under the action of external force, the torsion spring 52 stores energy. When locking is required, the torsion spring 53 is released to drive the lock rod 51 to rotate to a locked state.

[0037] The two ends of the locking rod 51 extend from the inner side of the lower box side 22 through the waist-shaped hole 22 a to the outer side of the lower box side 22 .

[0038] The bottom of the column 60 is fixed on the box top 31 of the upper box cover 30, and the buffer 70 is installed on the top of the column 60 following the flipping of the upper box cover 30. When the elevator is in use, the column 60 is horizontal; when the elevator is under maintenance, the column 60 is vertical.

[0039] In order to sense the state of the column 60, the present invention further includes at least one electrical switch, which is used to sense the state of the column 60 and is connected to the elevator control system signal. The electrical switch can be installed on the lower box cover 20 or the upper box cover 30 or the bottom plate 10. As a special case: there are two electrical switches, and the two electrical switches 81 and 82 are both installed on the upper box cover 30. One electrical switch 81 is used to sense that the column 60 is in a horizontal state, and the other electrical switch 82 is used to sense that the column 60 is in a vertical state. The column 60 is neither in a horizontal state nor in a vertical position, which is called an intermediate state. The specific installation positions of the two electrical switches 81 and 82 can be adjusted as needed.

[0040] In normal operation of the elevator, see Figure 2 The locking device 50 is unlocked, and the upper box cover 30 is turned upward around the rotating shaft 40 until it is turned over to the position as shown in FIG. Figure 2 In the vertical state shown, the column 60 also follows the upper box cover 30 to flip to Figure 2 The horizontal state shown in the figure lies flat in the pit, which does not affect the normal operation of the elevator. At this time, the electrical switch 82 is reset, the electrical switch 81 is actuated, and the monitoring signal of the switch is automatically fed back to the elevator control system.

[0041] In the elevator maintenance operation state, the upper box cover 30 is flipped down around the rotating shaft 40 until it is flipped down to Figure 5 and Figure 6 The horizontal state shown is locked on the lower box cover 20 by the locking device 50. At this time, the column 60 is erected and is in a vertical state. At this time, the electrical switch 82 is actuated, the electrical switch 81 is reset, and the monitoring result of the switch is automatically transmitted to the electrical control system.

[0042] When the elevator needs to enter the maintenance state, the column 60 is first pulled up by hand, and the column 60 drives the upper box cover 30 to rotate upward around the rotating shaft 40 until the column 60 is in an upright state. During the process of the column 60 being raised, the inclined surfaces 32c on the two upper box side edges 32 of the upper box cover 30 first contact the two ends of the locking rod 51. The locking rod 51 is then rotated counterclockwise to lock the upper box cover 30 on the lower box cover 20, so that the upper box cover 30 is locked on the lower box cover 20, and the locking rod 51 is locked in the lower box cover 20. When the column 60 leaves the horizontal state, the electrical switch 81 returns to the reset state from the action state, and when the column 60 enters the vertical state, the electrical switch 82 changes from the reset state to the action state.

[0043] When the elevator needs to be reset after maintenance, hold the column 60 with both hands and gently push one end of the locking rod 51 with your foot. After overcoming the torsion torque of the torsion spring 51, the locking rod 51 rotates clockwise to the opening of the locking groove 32a, so that the locking device 50 is unlocked, and the upper box cover 30 and the lower box cover 20 are unlocked.

[0044] After the upper box cover 30 and the lower box cover 20 are unlocked, the column 60 is gently pulled downward with both hands, the foot pushing the end of the lock rod 51 is released, and the column 60 is slowly turned downward. The column 60 drives the upper box cover 30 to turn around the rotating shaft 40 to a vertical state. At this time, the column 60 also turns to a horizontal state with the upper box cover 30 and lies flat in the bottom pit. When the column 60 leaves the vertical state, the electrical switch 82 changes from the action state to the reset state. When the column 60 is flattened, the electrical switch 81 changes from the reset state to the action state.

[0045] The stopping device of the shallow pit elevator of the present invention has the advantage that it can realize self-locking when standing up, has a fool-proof effect, and does not cause the risk of erroneous operation due to forgetting the operating steps.

[0046] The present invention provides two levels of safety protection for the elevator pit space. First, electrical safety protection. After the stop device is activated, the electrical switch is triggered and the elevator can only be inspected and operated. The lowest position of the inspection and operation is controlled by the system setting. Second, mechanical safety protection. When the electrical safety protection system fails, the car that continues to descend will be stopped by the stop device of the present invention to ensure the safety of the pit space.

Claims

1. A stopping device for a shallow pit elevator, characterized in that: Include: Base plate; A lower box cover fixedly mounted on the bottom plate; An upper box cover hinged on the lower box cover, the upper box cover and the lower box cover can be turned up and down around a rotating shaft, and the upper box cover and the lower box cover are locked by a locking device when they are in a closed state; A column, the bottom of which is fixed on the upper box cover and follows the turning of the upper box cover; when the elevator is in use, the column is horizontal; when the elevator is under maintenance, the column is vertical; A buffer, the buffer being mounted on the column; During elevator maintenance, the upper box cover and the lower box cover are locked by a locking device to ensure that the column remains vertical reliably; The locking device comprises a locking rod, a shaft and a spring, wherein the locking rod is arranged on the lower box cover through the shaft, one end of the spring acts on the locking rod, and the other end acts on the lower box cover; when the elevator is in use, the locking rod is in an unlocked state to unlock the upper box cover; When the elevator is under maintenance, the locking rod is in a locked state, locking the upper box cover and the lower box cover together; The shaft is a torsion spring shaft, the spring is a torsion spring, and the torsion spring is wound on the torsion spring shaft; The lower box cover at least comprises a box bottom and a lower box side edge folded upward from one side edge of the box bottom and extending upward, a waist-shaped hole is provided on the lower box side edge, and the end of the locking rod passes through the waist-shaped hole from the inner side of the lower box side edge and extends to the outer side of the lower box side edge; the upper box cover at least comprises a box top and an upper box side edge folded downward from one side edge of the box top and extending downward, a locking groove and an unlocking notch communicating with each other are provided on the upper box side edge, and the locking rod is in an unlocked state, and the end of the locking rod retreats from the locking groove into the unlocking notch to unlock the upper box cover; The locking rod is in a locked state, and the end of the locking rod enters the locking groove through the unlocking notch to lock the upper box cover and the lower box cover together; An inclined surface for guiding the locking rod into the locking groove is provided at the bottom of the locking groove, and the locking rod is guided into the locking groove through the inclined surface; When the elevator needs to enter the maintenance state, first pull the column upward by hand, and the column drives the upper box cover to rotate upward around the rotating axis until the column is in an upright position; during the process of the column being erected, the inclined surfaces on the two upper box sides of the upper box cover first contact the two ends of the locking rod; as the column is erected, the inclined surfaces on the two upper box sides of the upper box cover gradually overcome the torsional moment of the torsion spring and push the two ends of the locking rod in a clockwise direction. Under the action of the torque, the locking rod rotates clockwise around the torsion spring axis until the two ends of the locking rod rotate to the two upper box sides of the upper box cover The end of the inclined surface of the upper box cover slides into the opening of the lock groove on the two upper box side edges of the upper box cover. At this time, the force of the inclined surfaces on the two upper box side edges of the upper box cover disappears. Under the torsional torque of the torsion spring, the lock rod quickly rotates counterclockwise, inserts into the lock groove on the two upper box side edges of the upper box cover and presses tightly on the bottom of the lock groove, thereby locking the upper box cover on the lower box cover, so that the column realizes self-locking in the upright state; when the column leaves the horizontal state, the electrical switch returns from the action state to the reset state, and when the column enters the vertical state, the electrical switch changes from the reset state to the action state; When the elevator needs to be reset after maintenance, hold the column with both hands and gently push one end of the locking rod with your foot. After the locking rod overcomes the torsional torque of the torsion spring, it rotates clockwise to the opening of the lock slot, unlocking the locking device and unlocking the upper and lower box covers.

2. A stopping device for a shallow pit elevator as claimed in claim 1, characterized in that: It also includes at least one electrical switch, which is used to sense the state of the column; the electrical switch is connected to the elevator control system signal.

3. A stopping device for a shallow pit elevator as claimed in claim 2, characterized in that: The electrical switch is mounted on the lower box cover or the upper box cover or the bottom plate.

4. The stopping device for a shallow pit elevator according to claim 2, characterized in that: There are two electrical switches, both of which are installed on the upper box cover. One electrical switch is used to sense that the column is in a horizontal state, and the other electrical switch is used to sense that the column is in a vertical state. The state in which the column is neither in a horizontal state nor in a vertical position is called an intermediate state.

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