A limiting device for elevator pit maintenance

Abstract

The utility model relates to elevator maintenance technical field, concretely relates to a kind of limiting device for elevator pit maintenance, including elevator pit, the limiting assembly for being used to limit the elevator car when elevator pit maintenance is set in elevator pit pit, the limiting assembly includes: first steel frame and second steel frame.The utility model, by setting first steel frame and second steel frame as fixed base point, cooperate rotatable first ladder frame and second ladder frame to form support limiting structure, improve its support strength and stability, realize reliable interception to elevator car when maintenance, both ensure connection rigidity, and simplify operation process, simultaneously, safety limiting and maintenance ladder function are combined into one, both avoid the cumbersome of additional carrying independent tool, and provide convenient and safe passage for personnel to enter and exit pit, realize the efficient integration of structure function in limited space.

Description

Technical Field

[0001] This utility model relates to the field of elevator maintenance technology, specifically to a limiting device for elevator pit maintenance. Background Technology

[0002] As an indispensable vertical transportation device in modern buildings, the safe and stable operation of elevators is of paramount importance. The elevator pit, as the final buffer area for elevator operation, needs to be regularly inspected, cleaned, and have its components replaced to ensure the effectiveness of key safety components such as buffers and speed governors, to promptly identify and address potential faults, and to ensure the normal use of the elevator in the future.

[0003] In existing technology, maintenance personnel typically use a ladder to enter the pit and place a temporary support rod inside the pit to support the bottom of the elevator car between the bottom of the pit and the bottom of the elevator car, thus forming a physical barrier to block the car during maintenance.

[0004] However, certain limitations exist in its application. The strength and stability of a single simple support are limited, and the safety effect largely depends on the operator's procedures. Different maintenance personnel have significantly different operating methods, making it difficult to guarantee an ideal limiting effect for every maintenance operation. Furthermore, most limiting devices are specific, independent components that require additional configuration and portability, making it difficult to flexibly adapt to the existing site structure. Therefore, this paper proposes a limiting device for elevator pit maintenance to address these issues. Utility Model Content

[0005] To address the aforementioned shortcomings of existing technologies, this utility model provides a limiting device for elevator pit maintenance. It effectively solves the problems of limited strength and stability of a single simple support in existing technologies, the safety effect being highly dependent on the operating procedures of personnel, the large differences in operating methods among different maintenance personnel, the difficulty in ensuring that the ideal limiting effect can be achieved for each maintenance, and the fact that most limiting devices are specific independent components that require additional configuration and carrying, making it difficult to flexibly set according to the existing structure on site.

[0006] To achieve the above objectives, this utility model provides the following technical solution: This utility model provides a limiting device for elevator pit maintenance, comprising: An elevator pit, wherein a limiting component is provided within the elevator pit for limiting the movement of the elevator car during maintenance in the elevator pit, the limiting component comprising: The first steel frame and the second steel frame are fixedly installed on opposite sides of the elevator pit, and multiple sets of joint grooves are opened on the side wall of the second steel frame. A ladder unit includes a first ladder rotatably connected to the top of the first steel frame via a first hinge and a second ladder rotatably connected to the bottom of the first steel frame via a second hinge. The first and second ladders rotate relative to the first steel frame such that their free ends selectively engage with the engagement groove on the second steel frame.

[0007] Preferably, the first ladder frame includes a connecting frame, a step, and a movable structure. The movable structure is slidably disposed on the connecting frame to adjust the overall length of the ladder frame assembly. The step is fixedly disposed between multiple sets of connecting frames, and multiple sets of step are provided.

[0008] Preferably, the movable structure includes a connecting block, a slide rod fixedly welded to the outer wall of the connecting block, and a slide groove formed on the outer wall of the connecting frame. The end of the slide rod is slidably connected in the slide groove, and the connecting block is engaged in the corresponding engagement groove.

[0009] Preferably, a spring strip is fixedly installed in the inner cavity of the slide groove, and the other end of the spring strip is fixedly connected to the slide rod. In its natural state, the spring strip pushes the slide rod to move out of the slide groove.

[0010] Preferably, a guide rod is fixedly provided on the inner wall of the slide groove, a spring strip is sleeved on the outer wall of the guide rod, and the slide rod is slidably connected to the outer wall of the guide rod.

[0011] Preferably, the inner wall of the slide groove is provided with a movable groove, and a slider is slidably connected to the inner wall of the movable groove, the slider being fixedly mounted on the outer wall of the slide rod.

[0012] Preferably, a positioning frame is fixedly provided on the elevator pit wall, and a connecting block is inserted between the positioning frame and the elevator pit wall.

[0013] Preferably, a connecting rod is fixedly provided on the outer wall of the connecting block, and the other end of the connecting rod slides through the pedal. A crossbar is fixedly provided between multiple sets of the connecting rods, and an adjusting ring is rotatably connected to the crossbar by a pin.

[0014] The technical solution provided by this utility model has the following advantages compared with the known prior art: In this utility model, by setting the first steel frame and the second steel frame as fixed base points, and cooperating with the rotatable first ladder frame and the second ladder frame to form a support and limiting structure, the support strength and stability are improved, and the elevator car is reliably intercepted during maintenance. Moreover, the telescopic adjustment mechanism of the first ladder frame, through the cooperation of the spring strip and the guide rod, not only ensures the connection rigidity, but also simplifies the operation process and significantly improves work efficiency. At the same time, the safety limiting and maintenance ladder functions are combined into one, which not only avoids the cumbersome process of carrying separate tools, but also provides a convenient and safe passage for personnel to enter and exit the pit, realizing the efficient integration of structural functions within a limited space. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the limiting component structure of this utility model; Figure 3 This is a schematic diagram of the unfolded structure of this utility model; Figure 4 This is a partial structural cross-sectional view of the connecting frame of this utility model; Figure 5 This is a schematic diagram of the positioning frame structure of this utility model; Figure 6 This is a schematic diagram of the connecting rod structure of this utility model.

[0017] Reference numerals in the attached drawings: 1. Elevator pit; 2. First ladder frame; 201. Connecting frame; 202. Step; 203. Connecting block; 204. Slide rod; 205. Slide groove; 206. Spring bar; 207. Guide rod; 208. Slider; 209. Moving groove; 3. Second ladder frame; 4. First steel frame; 5. Second steel frame; 501. Engaging groove; 6. Positioning frame; 7. Connecting rod; 701. Crossbar; 702. Adjusting ring. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0019] The present invention will be further described below with reference to the embodiments.

[0020] See attached document Figure 1-6 A limit device for elevator pit maintenance, comprising: Elevator pit 1, with a limiting component installed inside the elevator pit for limiting the movement of the elevator car during maintenance in the elevator pit. This limiting component includes: The first steel frame 4 and the second steel frame 5 are respectively fixedly installed on the opposite sides of the elevator pit 1, providing a solid mounting base for the entire ladder unit. The side wall of the second steel frame 5 is provided with two sets of joint grooves 501, which correspond to the positions of the first ladder 2 and the second ladder 3 respectively. The joint grooves 501 are locking interfaces used to lock the free end of the ladder unit, so that it forms a stable support structure when unfolded. The ladder frame unit includes a first ladder frame 2 rotatably connected to the top of the first steel frame 4 via a first hinge and a second ladder frame 3 rotatably connected to the bottom of the first steel frame 4 via a second hinge. The first ladder frame 2 and the second ladder frame 3 rotate relative to the first steel frame 4, so that their free ends selectively engage with the engagement grooves 501 on the second steel frame 5. During maintenance, the first ladder frame 2 and the second ladder frame 3 are rotated toward the second steel frame 5 until their free ends engage with the corresponding engagement grooves 501. At this time, the first ladder frame 2 and the second ladder frame 3 are laid horizontally flat between the first steel frame 4 and the second steel frame 5 to form a support and limiting structure, which intercepts the descent path of the elevator car. After maintenance is completed, the first ladder frame 2 and the second ladder frame 3 are removed from the engagement grooves 501 and rotated to fit against the pit wall, without occupying the normal operating space of the elevator, and facilitating the user's entry and exit from the elevator pit 1.

[0021] The first ladder frame 2 includes a connecting frame 201, a step 202, and a movable structure. The movable structure is slidably mounted on the connecting frame 201 to adjust the overall length of the ladder frame assembly, so that the length of the first ladder frame 2 can be extended and retracted, thereby tightly engaging with the engagement groove 501 when unfolded. The step 202 is fixedly mounted between multiple sets of connecting frames 201, and multiple sets of step 202 are provided. The step 202 is for maintenance personnel to step on, while also enhancing the structural stability of the first ladder frame 2.

[0022] The movable structure includes a connecting block 203, a slide rod 204 fixedly welded to the outer wall of the connecting block 203, and a slide groove 205 opened on the outer wall of the connecting frame 201. The end of the slide rod 204 is slidably connected in the slide groove 205, and the connecting block 203 is engaged in the corresponding engagement groove 501. In use, the slide rod 204 slides in the slide groove 205 by moving the connecting block 203, thereby realizing the adjustment of the length of the first ladder frame 2 and the connection and disconnection with the second steel frame 5 and the positioning frame 6.

[0023] A spring strip 206 is fixedly installed in the inner cavity of the slide groove 205, and the other end of the spring strip 206 is fixedly connected to the slide rod 204. In the natural state, the spring strip 206 pushes the slide rod 204 to move out of the slide groove 205, providing a continuous thrust that causes the slide rod 204 and the connecting block 203 to extend outward, thereby improving the rigidity of the connection.

[0024] A guide rod 207 is fixedly installed on the inner wall of the slide groove 205, a spring strip 206 is sleeved on the outer wall of the guide rod 207, and a slide rod 204 is slidably connected to the outer wall of the guide rod 207, so that the slide rod 204 and the spring strip 206 move along their axial direction, which promotes the stability of the sliding and deformation process.

[0025] The inner wall of the slide groove 205 is provided with a movable groove 209, and a slider 208 is slidably connected to the inner wall of the movable groove 209. The slider 208 is fixedly installed on the outer wall of the slide rod 204. The movable groove 209 provides a sliding track for the slider 208, so that the slider 208 can only slide within its specified range, thereby indirectly controlling the sliding path and range of the slide rod 204.

[0026] A positioning frame 6 is fixedly installed on the wall of the elevator pit 1, and a connecting block 203 is inserted between the positioning frame 6 and the wall of the elevator pit 1. The positioning frame 6 and the wall of the elevator pit 1 together form a fixed space. When the first ladder 2 is vertically upward, the top of the connecting block 203 is restricted within it, which makes it easier to limit the position of the first ladder 2 and facilitates the user to enter and exit the elevator pit 1 through the first ladder 2.

[0027] A connecting rod 7 is fixedly installed on the outer wall of the connecting block 203, and the other end of the connecting rod 7 slides through the pedal 202. A crossbar 701 is fixedly installed between the two sets of connecting rods 7, and an adjusting ring 702 is rotatably connected to the crossbar 701 via a pin. The two sets of connecting rods 7 transmit the movement of the connecting block 203 to the crossbar 701. By pulling the adjusting ring 702 on the crossbar 701, the maintenance personnel can drive the connecting block 203 to pull it out from the engagement groove 501 and the positioning frame 6, thereby quickly unlocking the ladder and improving operating efficiency.

[0028] Working principle: During use, maintenance personnel pull the adjusting ring 702, which in turn moves the connecting rods 7 on both sides of the crossbar 701, thereby compressing the connecting block 203 and the slide rod 204 fixed thereto into the slide groove 205 and disengaging it from the positioning frame 6. Then, the first ladder frame 2, which is in the retracted state and against the pit wall, is rotated around the hinge point where it is connected to the first steel frame 4, so that it is spread out towards the second steel frame 5. When the first ladder frame 2 rotates to be parallel to the engagement groove 501 of the second steel frame 5, the adjusting ring 702 is released. At this time, under the push of the spring bar 206, the slide rod 204 slides outward along the guide rod 207 and drives the connecting block 203 to be inserted into the corresponding engagement groove 501. Similarly, the end of the second ladder frame 3 is also inserted into the corresponding engagement groove 501 on the second steel frame 5. At this time, the first ladder frame 2 and the second ladder frame 3 are laid flat laterally between the first steel frame 4 and the second steel frame 5, forming a rigid support and limiting structure that intercepts the elevator car on the descent path and prevents the car from falling unexpectedly. After the maintenance is completed, the maintenance personnel pull the adjusting ring 702 again to remove the connecting block 203 from the engagement groove 501. At the same time, the first ladder frame 2 and the second ladder frame 3 are rotated to a position close to the wall of the elevator pit 1 without affecting the normal operation of the elevator. At this time, the top of the connecting block 203 of the first ladder frame 2 is restricted by the positioning frame 6. The maintenance personnel enter and exit the elevator pit 1 by stepping on the pedal 202. The ladder frame unit serves as both a maintenance passage and a safety barrier, realizing the flexible application of the structure.

[0029] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A limiting device for elevator pit maintenance, comprising an elevator pit (1), characterized in that, The elevator pit (1) is equipped with a limiting component for limiting the elevator car during maintenance of the elevator pit. The limiting component includes: The first steel frame (4) and the second steel frame (5) are respectively fixedly installed on the opposite sides of the elevator pit (1). Multiple sets of joint grooves (501) are opened on the side wall of the second steel frame (5). The ladder unit includes a first ladder (2) rotatably connected to the top of the first steel frame (4) via a first hinge and a second ladder (3) rotatably connected to the bottom of the first steel frame (4) via a second hinge. The first ladder (2) and the second ladder (3) rotate relative to the first steel frame (4) such that their free ends selectively engage with the engagement groove (501) on the second steel frame (5).

2. The limiting device for elevator pit maintenance according to claim 1, characterized in that, The first ladder frame (2) includes a connecting frame (201), a step (202) and a moving structure. The moving structure is slidably disposed on the connecting frame (201) to adjust the overall length of the ladder frame assembly. The step (202) is fixedly disposed between multiple sets of connecting frames (201), and multiple sets of step (202) are provided.

3. A limiting device for elevator pit maintenance according to claim 2, characterized in that, The movable structure includes a connecting block (203), a slide rod (204) fixedly welded to the outer wall of the connecting block (203), and a slide groove (205) opened on the outer wall of the connecting frame (201). The end of the slide rod (204) is slidably connected in the slide groove (205), and the connecting block (203) is engaged in the corresponding engagement groove (501).

4. A limiting device for elevator pit maintenance according to claim 3, characterized in that, A spring strip (206) is fixedly installed in the inner cavity of the slide groove (205), and the other end of the spring strip (206) is fixedly connected to the slide rod (204). In the natural state, the spring strip (206) pushes the slide rod (204) to move out of the slide groove (205).

5. A limiting device for elevator pit maintenance according to claim 4, characterized in that, A guide rod (207) is fixedly installed on the inner wall of the slide groove (205), a spring strip (206) is sleeved on the outer wall of the guide rod (207), and a slide rod (204) is slidably connected to the outer wall of the guide rod (207).

6. A limiting device for elevator pit maintenance according to claim 5, characterized in that, The inner wall of the slide groove (205) is provided with a movable groove (209), and a slider (208) is slidably connected to the inner wall of the movable groove (209). The slider (208) is fixedly installed on the outer wall of the slide rod (204).

7. A limiting device for elevator pit maintenance according to claim 1, characterized in that, The elevator pit (1) is fixedly provided with a positioning frame (6), and a connecting block (203) is inserted between the positioning frame (6) and the elevator pit (1) wall.

8. A limiting device for elevator pit maintenance according to claim 7, characterized in that, A connecting rod (7) is fixedly provided on the outer wall of the connecting block (203), and the other end of the connecting rod (7) slides through the pedal (202). A crossbar (701) is fixedly provided between multiple sets of the connecting rods (7), and an adjusting ring (702) is rotatably connected to the crossbar (701) by a pin.

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