In-well telescopic ladder stand convenient to disassemble and assemble

Abstract

The utility model discloses an in-well telescopic crawling ladder convenient to disassemble and assemble, relates to the technical field of telescopic crawling ladders, and solves the problems that under the action of gravity, in the self-unfolding process of the telescopic crawling ladder, the last section of crawling ladder collides with facilities in a well, and the normal contraction of the crawling ladder is influenced due to deformation at the joint of a plurality of sections of crawling ladders after a long time. Comprising a plurality of crawling ladder structures which are assembled in sequence, each crawling ladder structure comprises two supporting columns which are symmetrically distributed, the upper ends of the supporting columns are fixedly sleeved with connecting bases, and the two connecting bases are fixedly connected through a supporting transverse rod; according to the telescopic ladder stand, the speed reduction structure is installed, the unfolding speed of the telescopic ladder stand can be effectively reduced, the situation that when the telescopic ladder stand is unfolded in a well, the last section of the telescopic ladder stand collides with facilities in the well, and consequently the connecting position of the telescopic ladder stand deforms can be avoided, and the telescopic ladder stand is convenient to disassemble and assemble in the actual using process by installing the supporting structure; and the device is convenient to carry and use.

Description

Technical Field

[0001] The utility model relates to the technical field of telescopic ladders, in particular to a well telescopic ladder which is easy to assemble and disassemble. Background Art

[0002] A manhole is a facility in an urban road, usually located under the road surface, used to collect rainwater and sewage and discharge them into sewers or rivers. It consists of a round or square manhole cover and a vertical pipe.

[0003] Some existing manholes are not equipped with ladders. When personnel go down the manhole for inspection, they need to carry their own ladders. In order to facilitate carrying, the ladder they carry is usually a telescopic ladder. When the personnel lower the telescopic ladder from the manhole, the telescopic ladder will automatically extend under the action of gravity. However, under the action of gravity, the last section of the telescopic ladder will hit the facilities in the manhole during the process of self-expansion. If this continues for a long time, the connection between the multiple sections of the ladder will cause deformation, thereby affecting the normal contraction of the ladder. Utility Model Content

[0004] The utility model aims to provide a well telescopic ladder capable of slowing down the unfolding speed of the telescopic ladder, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a telescopic ladder for a well that is easy to disassemble and assemble, comprising a plurality of ladder structures assembled in sequence, wherein the ladder structure comprises two symmetrically distributed support columns, the upper ends of the support columns are fixedly sleeved with connecting seats, the two connecting seats are fixedly connected by a supporting cross bar, and further comprises a deceleration structure for slowing down the deployment speed of the telescopic ladder, wherein the deceleration structure is installed inside the connecting seat; a supporting structure for suspending the telescopic ladder, wherein the supporting structure is installed inside one of the supporting cross bars at the uppermost end of the telescopic ladder; and a positioning assembly for positioning the supporting structure, wherein the positioning assembly is installed inside the supporting structure.

[0006] Preferably, the deceleration structure includes a cam installed inside the connecting seat, and an anti-skid pad is fixedly sleeved on the outer side of the cam. The anti-skid pad can increase the friction between the cam and the support column, and the connection between the anti-skid pad and the support column is active contact.

[0007] Preferably, a positioning shaft is fixedly embedded inside the cam, and two symmetrically distributed coil springs are fixedly sleeved outside the positioning shaft, and the coil springs can drive the cam to rotate.

[0008] Preferably, the outer end of the coil spring is fixedly connected to the connecting seat, and a limiting groove is provided inside the connecting seat corresponding to the location where the deceleration structure is installed. The limiting groove can limit the rotation angle of the cam, and the cam is rotatably connected to the connecting seat via the positioning shaft and the limiting groove.

[0009] Preferably, the support structure comprises two symmetrically distributed embedded rods, the embedded rods are solid structures, and the embedded rods can move inside the support cross bar.

[0010] Preferably, the ends of the two embedded rods that are close to each other are fixedly connected to a limiting block, which can prevent the embedded rods from detaching from the supporting cross bar, and the ends of the two embedded rods that are far away from each other are fixedly embedded with an anti-sliding block.

[0011] Preferably, the positioning assembly includes a top bead that can move up and down inside the embedded rod, and the connection between the top bead and the supporting cross bar is a movable snap-on connection. The lower end of the top bead is fixedly sleeved with an anti-slip sheet, which can prevent the top bead from detaching from the embedded rod, and the lower end of the anti-slip sheet is movably abutted against a spring.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model installs a deceleration structure. During the unfolding process of the telescopic ladder, the cams in the multiple deceleration structures contact and rub against the multiple support columns through the anti-skid pads, which can effectively slow down the unfolding speed of the telescopic ladder, thereby preventing the last section of the telescopic ladder from hitting the facilities in the well when the telescopic ladder is unfolded in the well, causing deformation of the connection of the telescopic ladder.

[0014] 2. The utility model installs a support structure, and the two embedded rods in the support structure can be extended and retracted inside the support cross bar, which is conducive to hanging the telescopic ladder in the well through the two embedded rods, so that the telescopic ladder is easy to disassemble and assemble during actual use, easy to carry, and more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an overall schematic diagram of the utility model;

[0016] Figure 2 It is a side sectional schematic diagram of the utility model;

[0017] Figure 3 For this utility model Figure 2 A is an enlarged schematic diagram;

[0018] Figure 4 This is a schematic diagram of the disassembly of the support structure and the ladder structure of the utility model.

[0019] In the figure: 1. ladder structure; 101. support column; 102. connecting seat; 103. supporting cross bar; 2. deceleration structure; 201. cam; 202. anti-skid pad; 203. positioning shaft; 204. coil spring; 205. limit rotation groove; 3. supporting structure; 301. embedded rod; 302. limit block; 303. anti-sliding block; 4. positioning assembly; 401. top bead; 402. anti-slip sheet; 403. spring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Embodiment 1

[0022] See also Figure 1 , Figure 2 The figure shows a telescopic ladder for a well that is easy to disassemble and assemble, including a plurality of ladder structures 1 assembled in sequence, the ladder structure 1 including two symmetrically distributed support columns 101, the upper ends of the support columns 101 are fixedly sleeved with a connecting seat 102, the two connecting seats 102 are fixedly connected by a supporting cross bar 103, and also includes a deceleration structure 2 for slowing down the deployment speed of the telescopic ladder, the deceleration structure 2 is installed inside the connecting seat 102; a support structure 3 for suspending the telescopic ladder, the support structure 3 is installed inside a supporting cross bar 103 at the uppermost end of the telescopic ladder; a positioning component 4 for positioning the support structure 3, the positioning component 4 is installed inside the support structure 3.

[0023] See also Figure 3 The deceleration structure 2 includes a cam 201 installed inside the connecting seat 102, and an anti-skid pad 202 is fixedly sleeved on the outer side of the cam 201. The anti-skid pad 202 can increase the friction between the cam 201 and the support column 101, and the connection between the anti-skid pad 202 and the support column 101 is active contact.

[0024] See also Figure 3 A positioning shaft 203 is fixedly embedded inside the cam 201 , and two symmetrically distributed coil springs 204 are fixedly sleeved on the outer side of the positioning shaft 203 . The coil springs 204 can drive the cam 201 to rotate.

[0025] See also Figure 3The outer end of the coil spring 204 is fixedly connected to the connecting seat 102, and a limited rotation groove 205 is opened inside the connecting seat 102 corresponding to the installation of the deceleration structure 2. The limited rotation groove 205 can limit the rotation angle of the cam 201, and the cam 201 is rotatably connected to the connecting seat 102 through the positioning shaft 203 and the limited rotation groove 205.

[0026] The working principle that can slow down the deployment speed of the telescopic ladder: after the personnel open the telescopic ladder in the well, the telescopic ladder automatically deploys under the action of gravity. During the deployment of the telescopic ladder, the cam 201 cannot rotate due to the action of the limit rotation groove 205, so the cam 201 contacts and rubs with the support column 101 through the anti-slip pad 202, which can effectively slow down the deployment speed of multiple support columns 101 of the telescopic ladder, thereby preventing the last section of the telescopic ladder from hitting the facilities in the well when the telescopic ladder is deployed in the well, causing deformation of the connection of the telescopic ladder.

[0027] Embodiment 2

[0028] See also Figure 4 This embodiment further explains the first embodiment. The support structure 3 includes two symmetrically distributed embedded rods 301 . The embedded rods 301 are solid structures, and the embedded rods 301 can move inside the supporting cross bar 103 .

[0029] See also Figure 4 The two embedded rods 301 are fixedly connected to the limiting block 302 at the ends close to each other. The limiting block 302 can prevent the embedded rods 301 from separating from the supporting cross bar 103. The two embedded rods 301 are fixedly embedded with an anti-sliding block 303 at the ends far away from each other.

[0030] In this embodiment: when installing the telescopic ladder in the manhole, the personnel respectively pull out the two embedded rods 301 from the supporting cross bar 103 through the anti-sliding block 303, so that the length composed of the two embedded rods 301 and the supporting cross bar 103 is greater than the diameter of the manhole, so that the telescopic ladder can be hung in the manhole through the two embedded rods 301, so that the telescopic ladder is easy to disassemble and assemble during actual use. When the telescopic ladder is not in use, the personnel put the embedded rods 301 into the supporting cross bar 103, so as to reduce the volume of the telescopic ladder, facilitate carrying, and be more convenient to use.

[0031] Embodiment 3

[0032] See also Figure 4 This embodiment further illustrates other embodiments. The positioning component 4 includes a top bead 401 that can move up and down inside the embedded rod 301, and the connection between the top bead 401 and the supporting cross bar 103 is a movable snap-on connection. The lower end of the top bead 401 is fixedly sleeved with an anti-slip sheet 402, which can prevent the top bead 401 from detaching from the embedded rod 301, and the lower end of the anti-slip sheet 402 is movably abutted against a spring 403.

[0033] In this embodiment: during the process of receiving the embedded rod 301 into the supporting cross bar 103, the top ball 401 is squeezed by the supporting cross bar 103 into the interior of the embedded rod 301. When the embedded rod 301 completely enters the supporting cross bar 103, the top ball 401 is driven by the spring 403 to snap into the reserved slot in the supporting cross bar 103, thereby positioning the embedded rod 301 and preventing the embedded rod 301 from slipping out of the supporting cross bar 103.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include"-"comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process-method-article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process-method-article or device.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A telescopic ladder for a well that is easy to disassemble and assemble, comprising a plurality of ladder structures (1) assembled in sequence, wherein the ladder structure (1) comprises two symmetrically distributed support columns (101), the upper ends of the support columns (101) are fixedly sleeved with a connecting seat (102), and the two connecting seats (102) are fixedly connected by a supporting cross bar (103), characterized in that: Also includes: A deceleration structure (2) for slowing down the unfolding speed of the telescopic ladder, wherein the deceleration structure (2) is installed inside the connecting seat (102); A support structure (3) for suspending the telescopic ladder, wherein the support structure (3) is installed inside a support cross bar (103) at the uppermost end of the telescopic ladder; A positioning component (4) is used to position the support structure (3); the positioning component (4) is installed inside the support structure (3).

2. The telescopic ladder for a well that is easy to assemble and disassemble according to claim 1 is characterized in that: The deceleration structure (2) comprises a cam (201) installed inside the connecting seat (102), an anti-skid pad (202) is fixedly sleeved on the outer side of the cam (201), and the connection between the anti-skid pad (202) and the supporting column (101) is a movable contact.

3. The telescopic ladder for a well that is easy to assemble and disassemble according to claim 2 is characterized in that: A positioning shaft (203) is fixedly embedded inside the cam (201), and two symmetrically distributed coil springs (204) are fixedly sleeved on the outside of the positioning shaft (203).

4. The telescopic ladder for a well that is easy to assemble and disassemble according to claim 3 is characterized in that: The outer end of the coil spring (204) is fixedly connected to the connecting seat (102), a limit rotation groove (205) is provided inside the connecting seat (102) corresponding to the location where the deceleration structure (2) is installed, and the cam (201) is rotationally connected to the connecting seat (102) via the positioning shaft (203) and the limit rotation groove (205).

5. The telescopic ladder for a well that is easy to assemble and disassemble according to claim 1 is characterized in that: The support structure (3) comprises two symmetrically distributed embedded rods (301), and the embedded rods (301) are capable of moving inside the support crossbar (103).

6. The telescopic ladder for a well that is easy to assemble and disassemble according to claim 5, characterized in that: The ends of the two embedded rods (301) that are close to each other are fixedly connected to the limiting block (302), and the ends of the two embedded rods (301) that are far away from each other are fixedly embedded with an anti-sliding block (303).

7. The telescopic ladder for a well that is easy to assemble and disassemble according to claim 6, characterized in that: The positioning assembly (4) comprises a top bead (401) that can move up and down inside the embedded rod (301), and the connection between the top bead (401) and the supporting cross bar (103) is a movable snap connection, and the lower end of the top bead (401) is fixedly sleeved with an anti-slip sheet (402), and the lower end of the anti-slip sheet (402) is movably abutted against a spring (403).

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