Landing door blocking device for elevator maintenance

Abstract

The utility model discloses a landing door blocking device for elevator maintenance and belongs to the field of special equipment.The landing door blocking device comprises a door jacking mechanism and a locking piece, the door jacking mechanism is tightly supported in a door sill, so that a landing door is prevented from being completely closed, and the locking piece and the door jacking mechanism are matched for use, so that the landing door is prevented from being completely closed. The locking plate is provided with a first blocking part and a second blocking part, the first blocking part can limit the landing door so as to avoid safety accidents caused by the fact that the landing door is opened by non-staff in a sliding mode in the maintenance process, and the second blocking part can limit the relative position between the locking plate and the door jacking mechanism so that the locking plate cannot be horizontally rotated in the maintenance state. Therefore, the limiting state of the first blocking part on the landing door cannot be released, and the landing door can be limited to a certain position by the blocking device, namely, the landing door cannot be opened excessively and cannot be closed completely.

Description

Technical Field

[0001] This application relates to the field of special equipment, and more particularly to a landing door blocking device for elevator maintenance. Background Technology

[0002] When maintenance personnel are performing repairs and maintenance in the elevator pit, they need to restrict the elevator landing doors on each floor so that the doors cannot be completely closed. When the elevator is in operation, the landing doors can be used for passage between pedestrians and the elevator.

[0003] During maintenance, elevator landing doors need to have a certain gap (e.g., a gap greater than 10cm). Currently available elevator landing door limiting devices can only prevent the doors from closing completely, but cannot prevent people outside the elevator from pushing the doors open and falling into the pit, causing a safety accident. Utility Model Content

[0004] This application provides a landing door blocking device for elevator maintenance, which can ensure safety during elevator maintenance.

[0005] This application provides a landing door blocking device for elevator maintenance. The landing door is slidably mounted on the door sill. The landing door blocking device includes: a door-mounting mechanism, which is braced within the door sill to prevent the landing door from closing; and a locking plate, including a connecting part, a first blocking part, and a second blocking part. The connecting part is connected to the door-mounting mechanism, and the first blocking part is connected to the connecting part. The first blocking part can abut against the landing door in the sliding direction of the landing door, thereby restricting the landing door from opening; the second blocking part is connected to the connecting part or the first blocking part, and the second blocking part can abut against the door sill in the horizontal direction to restrict the locking plate from rotating horizontally relative to the door-mounting mechanism.

[0006] The elevator door blocking device of this application has at least the following beneficial effects:

[0007] The blocking device of this application restricts the landing door from being fully closed by bracing the top door mechanism within the door sill. Furthermore, this application designs a locking plate that works in conjunction with the top door mechanism. The locking plate is equipped with a first blocking part and a second blocking part. The first blocking part can restrict the landing door to prevent unauthorized personnel from sliding it open during maintenance, thus preventing safety accidents. The second blocking part can restrict the relative position between the locking plate and the top door mechanism, preventing the locking plate from rotating horizontally during maintenance. This ensures that the restriction of the landing door by the first blocking part is not lifted. Therefore, the blocking device can restrict the landing door to a certain position, preventing it from being over-opened or completely closed. Attached Figure Description

[0008] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0009] Figure 1 This is a schematic diagram showing the door blocking device after installation.

[0010] Figure 2 yes Figure 1 The vertical cross-sectional view (F1 indicates the rotation direction of the threaded part, F2 indicates the movement direction of the nut, and F3 and F4 indicate the opening direction of the two trapezoidal blocks respectively).

[0011] Figure 3 This is a schematic diagram of the structure of the door blocking device of this application;

[0012] Figure 4 yes Figure 3 Schematic diagram of the middle locking plate;

[0013] The annotations in the attached figures are explained as follows:

[0014] 100. Top door mechanism; 110. Threaded part; 111. Pressing part; 120. U-shaped block; 121. Top wall; 122. Side wall; 130. Positioning pin; 140. Nut; 150. Trapezoidal block; 151. Contact surface; 152. Supporting surface; 160. Pressure sensor;

[0015] 200, locking piece; 210, connecting part; 210a, movable groove; 220, first blocking part; 221, vertical blocking surface; 230, second blocking part;

[0016] 300. Threshold;

[0017] 400. Floor door. Detailed Implementation

[0018] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0019] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0020] To facilitate understanding of the technical solution in this embodiment, the landing door structure in the prior art will first be explained. A landing door refers to a door between the elevator car door and the floor. A sill 300 is provided on the floor floor, and the landing door 400 slides horizontally on the sill 300 (i.e., the sill groove). The landing door 400 generally has two leaves, left and right, connected by a linkage mechanism (this is prior art). This linkage mechanism allows the two landing doors 400 to slide and close or open synchronously. Therefore, if one landing door is restricted, the position of the other landing door will also be restricted. During elevator maintenance, a certain horizontal gap must be maintained between the two landing doors 400; they cannot be completely closed, nor can they be fully opened (here, "fully open" refers to a state where pedestrians can pass through), otherwise a safety accident may occur.

[0021] like Figure 1 As shown, this embodiment discloses a landing door blocking device for elevator maintenance. The blocking device of this embodiment can restrict a landing door to a certain position, so that the landing door 400 cannot be completely closed or completely opened.

[0022] like Figure 1 As shown, the landing door blocking device in this embodiment includes a door-mounting mechanism 100 and a locking plate 200. The door-mounting mechanism 100 can be braced within the door sill 300, preventing the two landing doors 400 from being completely closed. The locking plate 200 is used to restrict the opening of the landing doors 400.

[0023] like Figure 2 and Figure 3 As shown, the top door mechanism 100 can refer to existing top door device structures or the preferred structures described in this embodiment.

[0024] like Figure 2 and Figure 3As shown, the top door mechanism 100 includes a threaded component 110, a U-shaped block 120, a locating pin 130, a nut 140, and two trapezoidal blocks 150, as detailed below:

[0025] like Figure 2 and Figure 3 As shown, the U-shaped block 120 has an inverted U-shaped shape in the sliding direction of the door. Specifically, the U-shaped block 120 includes a top wall 121 and two side walls 122 that are perpendicularly disposed at both ends of the top wall 121. The top wall 121 and the two side walls 122 form a U-shaped structure.

[0026] like Figure 2 and Figure 3 As shown, the threaded member 110 passes through the top wall 121 of the U-shaped block 120 from top to bottom. The threaded member 110 is rotatably disposed at the center position of the top wall 121, and the threaded member 110 is capable of rotating relative to the U-shaped block 120. At least a portion of the threaded member 110 is located between the two trapezoidal blocks 150. In this embodiment, the threaded member 110 is configured as a bolt.

[0027] like Figure 2 and Figure 3 As shown, two trapezoidal blocks 150 are disposed opposite each other on the inner side of the U-shaped block 120. Specifically, the two trapezoidal blocks 150 are disposed opposite each other between the two side walls 122 of the U-shaped block 120, and the two trapezoidal blocks 150 are disposed opposite each other along the radial direction of the threaded part 110. In this embodiment, the trapezoidal block 150 has a contact surface 151 abutting against the nut 140 on the side facing the nut 140 (i.e., the inner side), the outer circumference of the nut is tangent to the contact surface of the two trapezoidal blocks, and a supporting surface 152 abutting against the door sill 300 is disposed on the side away from the nut 140 (i.e., the outer side). The contact surface 151 includes a vertical surface and an inclined surface connected vertically, the vertical surface is located above the inclined surface, and the supporting surface 152 of the trapezoidal block 150 is at least partially located on the U-shaped block 120. Below 20, the lower part of the supporting surface 152 is used to abut against the door sill 300. The principle is: when the nut 140 moves upward, the outer peripheral surface of the nut 140 contacts and is tangent to the inclined surface. As the nut 140 moves upward and gradually approaches the top wall 121 of the U-shaped block 120, the supporting surfaces 152 of the two trapezoidal blocks 150 are opened by the nut 140 and contact the inner side of the door sill 300 (i.e., the door sill groove), so that the two trapezoidal blocks 150 are tightly supported inside the door sill 300.

[0028] like Figure 2 and Figure 3 As shown, the positioning pin 130 passes through the two sidewalls 122 and the two trapezoidal blocks 150 of the U-shaped block 120 along the thickness direction of the sidewall 122. The positioning pin 130 is used to connect the trapezoidal block 150 to the sidewall 122. In this embodiment, there are two positioning pins 130, and the two positioning pins 130 are arranged side by side.

[0029] like Figure 2 and Figure 3 As shown, the nut 140 is disposed between two trapezoidal blocks 150. The nut 140 is threadedly engaged with the threaded component 110. The threaded component 110 can drive the nut 140 to gradually move closer to or away from the top wall 121 of the U-shaped block 120. In this embodiment, the nut 140 is cylindrical in shape, and a threaded hole for threaded connection with the threaded component 110 is provided at the middle position of the nut 140.

[0030] like Figure 3 As shown, in some preferred embodiments, a groove is provided on the supporting surface 152 of the trapezoidal block 150, and a pressure sensor 160 is provided in the groove. The pressure sensor 160 can contact the door sill 300. Specifically, when the supporting surface 152 and the door sill 300 are in close contact, the pressure sensor 160 can also contact the door sill 300, thereby monitoring the contact pressure between the trapezoidal block 150 and the door sill 300 in real time. The pressure sensor 160 is connected to an external system via wired or wireless means. The installation of a pressure sensor 160 on the tensioning surface 152 offers two advantages. Firstly, by monitoring the contact pressure, it determines whether the trapezoidal block 150 is securely tightened within the door sill 300. This ensures stable tightening, preventing unauthorized removal and avoiding over-tightening that could damage the door sill structure. Secondly, staff can monitor the contact pressure on the tensioning surface 152 in real time via an external system. If someone removes the top door mechanism 100, the contact pressure will change (decrease), allowing staff to be promptly informed and provide feedback. In other embodiments, an alarm mechanism (not shown) can be installed. This alarm mechanism is located on one side of the top door mechanism 100 or near the landing door 400. The alarm mechanism is electrically connected to the pressure sensor 160. When an unauthorized person removes the top door mechanism 100, the contact pressure changes, and the pressure sensor 160 sends a signal to the alarm mechanism, triggering an audible and visual alarm.

[0031] In this embodiment, by setting a pressure sensor 160, the status of the top door mechanism 100 can be effectively and timely obtained, thereby indirectly ensuring the stability of the lock plate 200 during elevator maintenance.

[0032] like Figure 4 As shown, the locking plate 200 in this embodiment includes a connecting portion 210, a first blocking portion 220, and a second blocking portion 230. The connecting portion 210 is used to connect with the top door mechanism 100, the first blocking portion 220 is used to prevent the floor door 400 from sliding open, and the second blocking portion 230 is used to prevent the locking plate 200 from rotating horizontally relative to the top door mechanism 100, as detailed below:

[0033] like Figure 3 and Figure 4As shown, the connecting part 210 is connected to the top door mechanism 100. Along the axial direction (i.e., the height direction) of the threaded member 110, the connecting part 210 is located between the upper top surface of the U-shaped block 120 and the head of the threaded member 110. The threaded member 110 presses the connecting part 210 against the top wall 121 of the U-shaped block 120. In some preferred embodiments, the connecting part 210 is provided with a movable groove 210a, through which the threaded member 110 passes. The length direction of the movable groove 210a is perpendicular to the sliding direction of the landing door 400 in the horizontal plane. The movable groove 210a facilitates the adjustment of the position of the locking plate 200 along the length direction of the movable groove. On the one hand, it facilitates the adjustment of the position of the locking plate 200, and on the other hand, it avoids the situation where the landing door 400 and the locking plate 200 interfere with each other, causing the locking plate 200 to fail to limit the landing door 400.

[0034] like Figure 3 As shown, in some preferred embodiments, a clamping part 111 is provided below the head of the threaded part 110. The clamping part 111 is fixedly connected to the threaded part 110. The connecting part 210 of the locking piece 200 is located between the top wall 121 of the U-shaped block 120 and the clamping part 111. When the threaded part 110 is rotated, the clamping part 111 can press the connecting part 210 against the top wall 121 of the U-shaped block 120 or release the connecting part 210. In other embodiments, the clamping part 111 may also be a part with a certain degree of elasticity.

[0035] like Figure 4 As shown, the first blocking part 220 is connected to the connecting part 210. The first blocking part 220 can abut against the landing door 400 in the sliding direction of the landing door 400, thereby restricting the opening of the landing door 400. Specifically, the first blocking part 220 extends a certain length (generally less than 5cm) along the sliding direction of the landing door 400. One end of the first blocking part 220 is connected to the connecting part 210, and the other end of the first blocking part 220 is provided with a vertical blocking surface 221. In the sliding direction of the landing door 400, the projection of the vertical blocking surface 221 and the landing door 400 (specifically the rib on the back of the landing door 400) overlaps at least partially, thereby preventing the landing door 400 from being slid open by the vertical blocking surface 221, that is, preventing the landing door 400 from being slid open in the direction away from the top door mechanism 100.

[0036] like Figure 3 and Figure 4As shown, the second blocking part 230 is connected to the connecting part 210 or the first blocking part 220 (in this embodiment, the second blocking part 230 is preferably connected to the first blocking part 220), and the second blocking part 230 can abut against the door sill 300 in the horizontal direction. The second blocking part 230 is used to restrict the horizontal rotation of the locking piece 200 relative to the top door mechanism 100. Specifically, the second blocking part 230 is L-shaped, and one side of the second blocking part 230 is vertically arranged. The horizontal side of the upper end of the second blocking part 230 is connected to the first blocking part 220, and the vertical side of the second blocking part 230 is vertically arranged. The second blocking part 230 extends downwards for a certain length and extends into the door sill 300 (i.e., the sill groove). In this embodiment, the length of the second blocking part 230 extending into the door sill is preferably 0.5cm to 2cm. The lower end of the second blocking part 230 can abut against the inner side of the door sill 300 in the horizontal direction. Therefore, the horizontal rotation freedom of the locking plate 200 can be restricted by the second blocking part 230 to prevent non-staff members from rotating the locking plate 200, thereby avoiding the situation where the vertical blocking surface 221 of the first blocking part 220 does not correspond to the landing door 400 during elevator maintenance.

[0037] In this embodiment, the second blocking part 230 restricts the rotational freedom of the locking piece 200. Therefore, if a non-staff member wants to open the landing door 400, they can only do so by rotating the threaded part 110 to loosen the clamping part 111 on the threaded part 110 from the connecting part 210 of the locking piece 200, and by lifting the locking piece 200 upwards, so that the second blocking part 230 can be raised and disengaged from the door sill 300, thereby releasing the restriction state of the first blocking part 220 on the landing door 400. It should be noted that non-staff members cannot loosen the threaded part 110 without tools. Furthermore, even if non-staff members loosen the threaded part 110, the contact pressure between the trapezoidal block 150 and the door sill 300 will change, and staff members can immediately know and make corresponding feedback.

[0038] like Figure 4 As shown, in some preferred embodiments, the connecting part 210, the first blocking part 220 and the second blocking part 230 are integrally formed or fixedly connected. In this embodiment, the connecting part 210, the first blocking part 220 and the second blocking part 230 are preferably integrally formed, which has good structural performance, and the connecting part 210, the first blocking part 220 and the second blocking part 230 are all sheet-like structures.

[0039] One working mode of the landing door blocking device in this embodiment is as follows:

[0040] Before performing elevator maintenance, the following procedures should be followed:

[0041] The first step is to thread the threaded part 110 of the top door mechanism 100 through the connecting part 210 of the locking plate 200 and thread it with the nut 140.

[0042] The second step involves placing the top door mechanism 100 inside the door sill 300, then adjusting the first blocking part 220 of the locking plate 200 to prevent the landing door 400 from sliding open, while the second blocking part 230 extends downwards into the door sill 300; Figure 2 As shown, the threaded part 110 is then rotated using a tool (arrow F1 indicates the direction of rotation of the threaded part) so that the nut 140 moves upward (arrow F2 indicates the direction of movement of the nut). At the same time, the clamping part 111 on the threaded part 110 presses the locking piece 200 downward against the top wall 121 of the U-shaped block 120.

[0043] Third, as the nut 140 moves upward, it opens up the two trapezoidal blocks 150 (arrows F3 and F4 indicate the opening direction of the two trapezoidal blocks respectively), so that the tensioning surface 152 of the trapezoidal block 150 contacts the inner side of the door sill 300. The pressure sensor 160 monitors the contact pressure between the tensioning surface 152 and the door sill 300. When the pressure reaches the target, the screwing of the threaded part 110 is stopped. At this time, the blocking device is installed and the staff can carry out elevator maintenance operations.

[0044] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A landing door blocking device for elevator maintenance, wherein the landing door is slidably mounted on the door sill, characterized in that, The door blocking device includes: The door sill mechanism is secured within the door threshold to prevent the landing door from closing. The locking plate includes a connecting part, a first blocking part, and a second blocking part. The connecting part is connected to the top door mechanism, and the first blocking part is connected to the connecting part. The first blocking part can abut against the landing door in the sliding direction of the landing door, thereby restricting the landing door from opening. The second blocking part is connected to the connecting part or the first blocking part, and the second blocking part can abut against the door sill in the horizontal direction, thereby restricting the locking plate from rotating horizontally relative to the top door mechanism.

2. The door blocking device according to claim 1, characterized in that, The top door mechanism includes a threaded component, a U-shaped block, a positioning pin, a nut, and two trapezoidal blocks; The threaded component passes through the top wall of the U-shaped block, and the nut is threadedly engaged with the threaded component; two trapezoidal blocks are positioned opposite each other on the inner sides of the two side walls of the U-shaped block; along the radial direction of the threaded component, the two trapezoidal blocks are located on both sides of the threaded component, and the locating pin passes through the two side walls of the U-shaped block and the two trapezoidal blocks; the trapezoidal blocks have a contact surface that abuts against the nut on the side facing the nut, and a tensioning surface that abuts against the door sill on the side away from the nut; by rotating the threaded component, the nut causes the two trapezoidal blocks to be pushed outward.

3. The door blocking device according to claim 2, characterized in that, The nut is cylindrical in shape, and its outer circular surface is tangent to the contact surface of the two trapezoidal blocks.

4. The door blocking device according to claim 2, characterized in that, The threaded component is configured as a bolt.

5. The landing door blocking device according to any one of claims 2 to 4, characterized in that, A groove is provided on the support surface, and a pressure sensor is installed in the groove, which can contact the door sill.

6. The landing door blocking device according to any one of claims 2 to 4, characterized in that, The connecting part is provided with a movable groove, the length direction of which is perpendicular to the sliding direction of the door; the threaded part passes through the movable groove.

7. The door blocking device according to claim 6, characterized in that, The threaded part is provided with a clamping part, and the connecting part is located between the top wall of the U-shaped block and the clamping part. The clamping part is used to press the connecting part onto the U-shaped block.

8. The door blocking device according to claim 1, characterized in that, One end of the first blocking part is connected to the connecting part, and the other end of the first blocking part is provided with a vertical blocking surface; in the sliding direction of the landing door, the vertical blocking surface at least partially overlaps with the projection of the landing door.

9. The door blocking device according to claim 1 or 8, characterized in that, One end of the second blocking part is connected to the first blocking part, and the second blocking part extends downward, while the other end of the second blocking part can abut against the inside of the door sill.

10. The door blocking device according to claim 9, characterized in that, The connecting part, the first blocking part, and the second blocking part are integrally formed or fixedly connected.

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