CN215946448U - Automatic pedal retracting device for building construction elevator - Google Patents
Automatic pedal retracting device for building construction elevator Download PDFInfo
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- CN215946448U CN215946448U CN202121933554.9U CN202121933554U CN215946448U CN 215946448 U CN215946448 U CN 215946448U CN 202121933554 U CN202121933554 U CN 202121933554U CN 215946448 U CN215946448 U CN 215946448U
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- 238000009435 building construction Methods 0.000 title abstract description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 38
- 230000001174 ascending effect Effects 0.000 claims abstract description 7
- 238000010276 construction Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 230000033001 locomotion Effects 0.000 description 6
- 230000005484 gravity Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The utility model discloses an automatic retraction pedal device for a building construction elevator, which comprises: the bottom plate is provided with a sliding plate which can extend out of the bottom plate in a sliding way; the supporting frame comprises a first supporting frame and a second supporting frame; the sliding plate and the left side of the elevator door are in transmission fit through the first transmission structure, so that the elevator door can drive the sliding plate to slide into the bottom plate in at least part of descending paths; the sliding plate and the right side of the elevator door are in transmission fit through the second transmission structure, so that at least part of the ascending path of the elevator door can drive the sliding plate to slide out of the bottom plate. According to the automatic retractable pedal device for the building construction elevator, the sliding plate can be driven to automatically extend and retract when the elevator door is opened and closed, the structure is simple and practical, and the safety of constructors in the building construction process is guaranteed.
Description
Technical Field
The utility model relates to the technical field of building construction elevators, in particular to an automatic retraction pedal device for a building construction elevator.
Background
Along with the continuous progress of building construction technology, not only the height of building is increasing continuously, and building volume and area are also increasing along with increasing, and construction elevator for building is manned cargo-carrying construction machinery that often uses in the building, is important, indispensable vertical transport means in the work progress, consequently, guarantees that elevator safety in utilization is very important, and especially the current safety protection from construction elevator to operation floor is crucial to project safety control. At present, the most applied construction elevators are in a mode of arranging a turning plate and edge protection at a gap between a construction elevator and a floor, and the original common construction elevator needs to set up protection scaffolds as safety channels from an elevator opening to two sides of the floor, but considering that the number of floors in a high-rise building is large, the building height is high, and the setting of the scaffolds takes labor and materials and has certain potential safety hazards; and this kind of way must open the board that turns over after opening the elevator door, and the lift-cabin door switch operation is complicated, leads to many operating personnel to save trouble and does not use the board that turns over when getting in and out the elevator many, has the potential safety hazard of falling people, falling object.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides an automatic retraction pedal device for a building construction elevator, wherein a turning plate is improved into an automatic retraction sliding plate which is retracted synchronously with an elevator door, and when the elevator door is opened and closed, the sliding plate can automatically extend and retract, so that the passing safety of personnel and materials is ensured.
An automatic retraction pedal device for a construction elevator according to an embodiment of a first aspect of the present invention includes: the bottom plate is provided with a sliding plate which can extend out of the bottom plate in a sliding way; the supporting frame is vertically arranged on the bottom plate; the supporting frames comprise a first supporting frame and a second supporting frame which are respectively connected to the left side and the right side of the bottom plate, and the elevator door is arranged between the first supporting frame and the second supporting frame in a lifting mode; the sliding plate and the left side of the elevator door are in transmission fit through the first transmission structure, so that the elevator door can be driven to slide into the bottom plate in at least partial descending path process; the sliding plate and the right side of the elevator door are in transmission fit through the second transmission structure, so that the elevator door can be driven to slide out of the bottom plate in at least part of the ascending path process.
According to the embodiment of the utility model, the automatic retraction pedal device for the building construction elevator at least has the following technical effects: the first transmission structure and the second transmission structure are respectively arranged on the left side and the right side of the elevator door, so that the sliding plate can be driven to automatically extend out and retract when the elevator door is opened and closed, the structure is simple and practical, and compared with the currently used turnover plate structure, the sliding plate is more convenient to hide in design and more convenient to use; the sliding plate automatically extends and retracts along with the lifting of the elevator door, so that the safety of constructors in the building construction process is effectively ensured.
According to some embodiments of the utility model, the first transmission structure comprises a first lifting slider and a first horizontal slider, the first lifting slider being elevatably mounted to the first support frame, the first horizontal slider being connected to the slide; when the elevator door descends and drives the first lifting slider to descend, the first horizontal slider can be driven to slide, and then the sliding plate is driven to slide into the bottom plate.
According to some embodiments of the utility model, the second transmission structure comprises a second lifting slider and a second horizontal slider, the second lifting slider is arranged on the second support frame in a lifting manner, and the second horizontal slider is connected with the sliding plate; when the elevator door rises and drives the second lifting slider to rise, the second horizontal slider can be driven to slide, and the sliding plate is driven to slide out of the bottom plate.
According to some embodiments of the utility model, a first slide rail is fixedly mounted at the lower part of the first support frame, and the first lifting slider is arranged on the first slide rail in a lifting manner; and a second sliding rail is fixedly mounted on the upper part of the second support frame, and a second lifting slider is arranged on the second sliding rail in a lifting manner.
According to some embodiments of the utility model, the left side of the elevator door is provided with a left stopper which can abut against the first lifting slider and drive the first lifting slider to descend along at least part of the descending path of the elevator door; the right side of the elevator door is provided with a right stopper, and the right stopper can be abutted against the second lifting slider along at least part of the ascending path of the elevator door and drives the second lifting slider to ascend.
According to some embodiments of the present invention, the left side and the right side of the bottom plate are respectively provided with a third slide rail and a fourth slide rail, the left end of the slide plate is slidably mounted on the third slide rail, and the right end of the slide plate is slidably mounted on the fourth slide rail; the first horizontal sliding piece penetrates through the third sliding rail to be connected with the left side of the sliding plate, and the second horizontal sliding piece penetrates through the fourth sliding rail to be connected with the right side of the sliding plate.
According to some embodiments of the utility model, the first transmission structure further comprises a first pulley, a second pulley and a first pull rope, wherein two ends of the first pull rope are respectively connected with the first lifting slider and the first horizontal slider, and the middle part of the first pull rope is wound around the first pulley and the second pulley.
According to some embodiments of the utility model, the first pulley is mounted above the first slide rail, and the second pulley is mounted in the sliding direction of the slide plate and behind the third slide rail.
According to some embodiments of the utility model, the second transmission structure further comprises a fourth pulley and a second pull rope, two ends of the pull rope are respectively connected with the second lifting slider and the second horizontal slider, and the middle part of the pull rope is wound around the fourth pulley.
According to some embodiments of the utility model, the second support frame is further provided with a sliding box, a counterweight pulley and a third pull rope, a counterweight block is slidably mounted in the sliding box, the third pull rope is wound around the counterweight pulley, and the counterweight block and the right stopper are respectively connected to two ends of the third pull rope; the counterweight block is used for applying upward acting force to the elevator door.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The utility model is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic view of a first angle configuration according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a second angle in accordance with the present invention;
FIG. 3 is an enlarged view at A in FIG. 1;
FIG. 4 is an enlarged view at B in FIG. 1;
fig. 5 is an enlarged view at C in fig. 2.
Reference numerals:
a bottom plate 100, an elevator door 101, a sliding plate 102, a third sliding rail 110 and a fourth sliding rail 120;
the device comprises a support frame 200, a first support frame 210, a left stopper 211, a first slide rail 212, a second support frame 220, a right stopper 221, a second slide rail 222, a slide box 230, a counterweight block 231, a counterweight pulley 240 and a third pull rope 250;
a first transmission structure 300, a first lifting slider 310, a first horizontal slider 320, a first pulley 330, a second pulley 340, a third pulley 350, and a first pull rope 360;
a second transmission structure 400, a second lifting slider 410, a second horizontal slider 420, a fourth pulley 430 and a second pull rope 440.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 5, an automatic retraction pedal device for a construction elevator according to an embodiment of the present invention includes:
a base plate 100 to which a slide plate 102 capable of extending out of the base plate 100 is slidably mounted; the slide plate 102 is disposed at the bottom of the base plate 100, and only the slide plate 102 can be seen when extending out of the base plate 100 during normal use.
A support frame 200 vertically installed on the base plate 100; the support frame 200 comprises a first support frame 210 and a second support frame 220, and the elevator door 101 is arranged between the first support frame 210 and the second support frame 220 in a lifting way; the first support frame 210 and the second support frame 220 are vertically connected to opposite left and right sides of the base plate 100, respectively. Protective nets are mounted on the first support frame 210 and the second support frame 220, and elevator doors 101 are mounted at the front end and the rear end of the bottom plate 100.
The first transmission structure 300, the sliding plate 102 and the left side of the elevator door 101 are in transmission fit through the first transmission structure 300, so that the elevator door 101 can drive the sliding plate 102 to slide into the bottom plate 100 at least partially in the descending path. Specifically, the first transmission structure 300 includes a first lifting slider 310 and a first horizontal slider 320, the first lifting slider 310 is mounted on the first support frame 210 in a lifting manner, and the first horizontal slider 320 is connected with the sliding plate 102; when the elevator door 101 descends and drives the first lifting slider 310 to descend, the first horizontal slider 320 can be driven to slide, and the sliding plate 102 is driven to slide into the bottom plate 100;
the second transmission structure 400, the sliding plate 102 and the right side of the elevator door 101 are in transmission fit through the second transmission structure 400, so that the elevator door 101 can drive the sliding plate 102 to slide out of the bottom plate 100 at least partially in the ascending path. Specifically, the second transmission structure 400 includes a second lifting slider 410 and a second horizontal slider 420, the second lifting slider 410 is installed on the second supporting frame 220 in a lifting manner, and the second horizontal slider 420 is connected with the sliding plate 102; when the elevator door 101 ascends and drives the second lifting slider 410 to ascend, the second horizontal slider 420 is driven to slide, and the sliding plate 102 is driven to slide out of the bottom plate 100.
The first transmission structure 300 and the second transmission structure 400 both convert the lifting motion of the elevator door 101 into the horizontal motion of the slide plate 102. The first transmission structure 300 and the second transmission structure 400 are respectively arranged on the left side and the right side of the elevator door 101, so that the sliding plate 102 can be driven to automatically extend and retract when the elevator door 101 is opened and closed, the structure is simple and practical, and compared with the currently used flap structure, the sliding plate 102 is more convenient to hide in design and more convenient to use; the sliding plate 102 automatically extends and retracts along with the lifting of the elevator door 101, so that the safety of constructors in the building construction process is effectively ensured.
In some embodiments of the present invention, the first sliding rail 212 is fixedly installed at the lower portion of the first supporting frame 210, and the first lifting slider 310 is installed in the first sliding rail 212 in a lifting manner; the second sliding rail 222 is fixedly installed on the upper portion of the second supporting frame 220, and the second lifting slider 410 is installed on the second sliding rail 222 in a lifting manner. The first sliding rail 212 is installed at the lower part of the first supporting frame 210, that is, the sliding plate 102 is retracted only when the elevator door 101 is about to be lowered to be completely closed; similarly, the second slide rail 222 is mounted on the upper portion of the second support frame 220, that is, the elevator door 101 can only be lifted to close to being fully opened to drive the sliding plate 102 to extend.
It is noted that the first lifting slider 310 is slidably mounted on the first sliding rail 212, and due to the friction between the first lifting slider 310 and the first sliding rail 212, the first lifting slider 310 does not slide down along the first sliding rail 212 when the first lifting slider 310 is subjected to only gravity. Similarly, the second lifting slide 410 does not slide down the second rail 222 under gravity alone.
In some embodiments of the present invention, the left side of the elevator door 101 is provided with a left stopper 211, and the left stopper 211 can abut against the first lifting slider 310 along at least a part of the descending path of the elevator door 101 and drive the first lifting slider 310 to descend; the right stopper 221 is provided at the right side of the elevator door 101, and the right stopper 221 can abut against the second lifting slider 410 along at least a part of the ascending path of the elevator door 101 and drives the second lifting slider 410 to ascend. The left stopper 211 and the right stopper 221 are both disposed at the lower portion of the left and right sides of the elevator door 101, and the elevator door 101 can be lifted to drive the left stopper 211 and the right stopper 221 to move synchronously.
In some embodiments of the present invention, the left and right sides of the bottom plate 100 are respectively provided with a third slide rail 110 and a fourth slide rail 120, the left end of the sliding plate 102 is slidably mounted on the third slide rail 110, and the right end is slidably mounted on the fourth slide rail 120; the first horizontal sliding member 320 is connected to the left side of the sliding plate 102 through the third sliding rail 110, and the second horizontal sliding member 420 is connected to the right side of the sliding plate 102 through the fourth sliding rail 120. The third slide rail 110 and the fourth slide rail 120 are both provided with strip-shaped holes, the first horizontal sliding piece 320 penetrates from the strip-shaped hole of the third slide rail 110 to be connected with the sliding plate 102, and the second horizontal sliding piece 420 penetrates from the strip-shaped hole of the fourth slide rail 120 to be connected with the sliding plate 102.
In some embodiments of the present invention, the first transmission structure 300 further includes a first pulley 330, a second pulley 340 and a first pull rope 360, the first pull rope 360 is connected to the first lift slider 310 and the first horizontal slider 320 at two ends, respectively, and is wound around the first pulley 330 and the second pulley 340 at the middle portion.
In some embodiments of the present invention, the first pulley 330 is installed above the first sliding rail 212, and the second pulley 340 is installed in the sliding direction of the sliding plate 102 and behind the third sliding rail 110. Specifically, as shown in fig. 2 and 5, a third pulley 350 is further provided, the first pulley 330 is disposed above the first sliding rail 212, the second pulley 340 is disposed behind the third pulley 350, and the third pulley 350 is disposed below the first sliding rail 212. The first pull is from the first lift slide 310, around the first pulley 330, the third pulley 350, the second pulley 340, and then to the first horizontal slide 320. The first pulley 330 functions to convert the lowering motion of the first lifting slider 310 into the raising motion. The second pulley 340 is disposed behind the third slide rail 110 for sliding the first horizontal sliding member 320 to the rearmost position of the third slide rail 110.
It is conceivable that the third pulley 350 may not be provided, and the first pulley 330 and the second pulley 340 are connected in a straight descending manner, and the first horizontal sliding member 320 is driven to slide backwards when the first raising price sliding member descends. The third pulley 350 has the advantages of being more labor-saving, and a fixed pulley is additionally arranged, so that the sliding plate 102 can be pushed to move with smaller force; further, after the third pulley 350 is provided, the first rope 360 entering the second pulley 340 is in a horizontal state, facilitating the horizontal sliding of the slide plate 102.
In some embodiments of the present invention, the second transmission structure 400 further includes a fourth pulley 430 and a second pull rope 440, two ends of the pull rope are respectively connected to the second lifter slider 410 and the second horizontal slider 420, and a middle portion of the pull rope is wound around the fourth pulley 430. Specifically, as shown in fig. 1 and 4, the fourth pulley 430 converts the horizontal movement of the second lifting slider 410 into the horizontal movement of the second horizontal slider 420; the fourth slider is disposed at the lower portion of the second supporting frame 220, and the second lifting slider 410 ascends to drive the second horizontal slider 420 to slide along the fourth sliding rail 120, so as to drive the sliding plate 102 to slide out.
It should be noted that the second horizontal slide 420 is connected to the rear of the slide plate 102, and the first horizontal slide 320 is connected to the middle or rear of the slide plate 102.
In some embodiments of the present invention, the second supporting frame 220 is further provided with a sliding box 230, a counterweight pulley 240 and a third pulling rope 250, wherein a counterweight block 231 is slidably mounted in the sliding box 230, the third pulling rope 250 is wound around the counterweight pulley 240, and the counterweight block 231 and the right stopper 221 are respectively connected to two ends of the third pulling rope 250; the counterweight 231 is used to apply an upward force to the elevator door 101. As shown in fig. 3, the counterweight pulley 240 is mounted on the upper portion of the second support frame 220. The weight of the counterweight 231 is less than the weight of the elevator door 101; the opening and closing of the elevator door 101 are manually pushed, and when the elevator door 101 is lifted and opened, the counterweight block 231 moves downwards, so that the force required for opening the elevator door 101 can be reduced; when the elevator door 101 descends and closes, the elevator door 101 is buffered by the counterweight 231, so that the elevator door 101 can be effectively prevented from descending too fast to cause collision and damage.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. The utility model provides a construction elevator is with automatic footboard device that contracts which characterized in that includes:
the device comprises a bottom plate (100), a sliding plate (102) which can extend out of the bottom plate (100) is installed in a sliding mode;
a support frame (200) vertically mounted on the base plate (100); the supporting frame (200) comprises a first supporting frame (210) and a second supporting frame (220) which are respectively connected to the left side and the right side of the bottom plate (100), and the elevator door (101) is arranged between the first supporting frame (210) and the second supporting frame (220) in a lifting mode;
the sliding plate (102) and the left side of the elevator door (101) are in transmission fit through the first transmission structure (300) so that the sliding plate (102) can be driven to slide into the bottom plate (100) by the elevator door (101) in at least part of descending path;
the sliding plate (102) and the right side of the elevator door (101) are in transmission fit through the second transmission structure (400), so that the sliding plate (102) can be driven to slide out of the bottom plate (100) by the elevator door (101) in at least part of the ascending path.
2. The automatic retraction pedal device for a construction elevator according to claim 1, wherein: the first transmission structure (300) comprises a first lifting slider (310) and a first horizontal slider (320), the first lifting slider (310) is arranged on the first support frame (210) in a lifting way, and the first horizontal slider (320) is connected with the sliding plate (102); when the elevator door (101) descends and drives the first lifting slider (310) to descend, the first horizontal slider (320) can be driven to slide, and the sliding plate (102) is driven to slide into the bottom plate (100).
3. The automatic retraction pedal device for a construction elevator according to claim 2, wherein: the second transmission structure (400) comprises a second lifting slider (410) and a second horizontal slider (420), the second lifting slider (410) is arranged on the second support frame (220) in a lifting manner, and the second horizontal slider (420) is connected with the sliding plate (102); when the elevator door (101) rises and drives the second lifting slider (410) to rise, the second horizontal slider (420) can be driven to slide, and the sliding plate (102) is driven to slide out of the bottom plate (100).
4. The automatic retraction pedal device for a construction elevator according to claim 3, wherein: a first slide rail (212) is fixedly mounted at the lower part of the first support frame (210), and the first lifting slider (310) is arranged on the first slide rail (212) in a lifting manner; and a second sliding rail (222) is fixedly mounted at the upper part of the second support frame (220), and the second lifting slider (410) is arranged on the second sliding rail (222) in a lifting way.
5. The automatic retraction pedal device for a construction elevator according to claim 4, wherein: the left side of the elevator door (101) is provided with a left stopper (211), and the left stopper (211) can be abutted against the first lifting slider (310) along at least part of descending path of the elevator door (101) and drives the first lifting slider (310) to descend; the right stopper (221) is arranged on the right side of the elevator door (101), and the right stopper (221) can abut against the second lifting slider (410) along at least part of the ascending path of the elevator door (101) and drives the second lifting slider (410) to ascend.
6. The automatic retraction pedal device for a construction elevator according to claim 4, wherein: a third slide rail (110) and a fourth slide rail (120) are respectively arranged on the left side and the right side of the bottom plate (100), the left end of the sliding plate (102) is slidably mounted on the third slide rail (110), and the right end of the sliding plate is slidably mounted on the fourth slide rail (120); the first horizontal sliding piece (320) is connected with the left side of the sliding plate (102) through the third sliding rail (110), and the second horizontal sliding piece (420) is connected with the right side of the sliding plate (102) through the fourth sliding rail (120).
7. The automatic retraction pedal device for a construction elevator according to claim 6, wherein: the first transmission structure (300) further comprises a first pulley (330), a second pulley (340) and a first pull rope (360), two ends of the first pull rope (360) are respectively connected with the first lifting slider (310) and the first horizontal slider (320), and the middle portion of the first pull rope is wound around the first pulley (330) and the second pulley (340).
8. The automatic retraction pedal device for a construction elevator according to claim 7, wherein: the first pulley (330) is installed above the first sliding rail (212), and the second pulley (340) is installed in the sliding direction of the sliding plate (102) and behind the third sliding rail (110).
9. The automatic retraction pedal device for a construction elevator according to claim 3, wherein: the second transmission structure (400) further comprises a fourth pulley (430) and a second pull rope (440), two ends of the pull rope are respectively connected with the second lifting slider (410) and the second horizontal slider (420), and the middle of the pull rope is wound around the fourth pulley (430).
10. The automatic retraction pedal device for a construction elevator according to claim 5, wherein: the second support frame (220) is further provided with a sliding box (230), a counterweight pulley (240) and a third pull rope (250), a counterweight block (231) is installed in the sliding box (230) in a sliding mode, the third pull rope (250) is wound on the counterweight pulley (240), and the counterweight block (231) and the right stopper (221) are connected to two ends of the third pull rope (250) respectively; the counterweight (231) is used for applying upward acting force to the elevator door (101).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121933554.9U CN215946448U (en) | 2021-08-17 | 2021-08-17 | Automatic pedal retracting device for building construction elevator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121933554.9U CN215946448U (en) | 2021-08-17 | 2021-08-17 | Automatic pedal retracting device for building construction elevator |
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| CN215946448U true CN215946448U (en) | 2022-03-04 |
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| CN202121933554.9U Active CN215946448U (en) | 2021-08-17 | 2021-08-17 | Automatic pedal retracting device for building construction elevator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113636436A (en) * | 2021-08-17 | 2021-11-12 | 中建科工集团有限公司 | Automatic pedal retracting device for building construction elevator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113636436A (en) * | 2021-08-17 | 2021-11-12 | 中建科工集团有限公司 | Automatic pedal retracting device for building construction elevator |
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