A positioning structure and installation method for escalator steps

Abstract

The present invention discloses a positioning structure applied to escalator steps, including: a step front shaft, a step, and a first and second step chain, wherein a first step shaft is provided at the first end of the step front shaft, and the step has first and second step claws located on the left and right sides of the step; the first and second step chains are installed on the second ends of the first step shaft and the step front shaft; and further include: a separate fixing clamp, a first step bushing, a first locking buckle, a second step bushing, and a second locking buckle. The first separate fixing clamp positioning end face of the separate fixing clamp of the present invention is in close contact with the step surface between the first step shaft and the rest of the step front shaft except the first step shaft, thereby ensuring the distance between each step and the main wheel of the ladder path, and achieving one-time clamping to ensure the distance between the step and the main wheel of the ladder path. The present invention also discloses an installation method of the positioning structure applied to escalator steps.

Description

Technical Field

[0001] The invention relates to the technical field of escalators, and in particular to a positioning structure and an installation method applied to escalator steps. Background Art

[0002] An escalator is a fixed electric drive device with circulating steps for transporting passengers up or down. As an important passenger transportation equipment, escalators are widely used in public places such as shopping malls, hotels, subways and railway stations. As the load-bearing components on the escalator that directly transport passengers, the meshing accuracy of adjacent steps must be ensured during operation. If misalignment occurs, it will cause friction noise at the least and collision damage at the worst, thus affecting the safety of passengers. Therefore, it is necessary to ensure that the steps have a high positioning accuracy during the installation process.

[0003] When installing steps on an escalator, it is necessary to ensure that each step is at the same distance from the main wheel of the ladder. In the traditional installation process, the installer needs to use a caliper to measure the distance from each step to the main wheel of the ladder. For the installer, it takes a lot of man-hours and reduces the assembly efficiency. At the same time, due to human errors, the positioning accuracy of adjacent steps is difficult to ensure and the positioning accuracy is also unstable.

[0004] Patents CN106475929A and CN106477444A both propose an escalator step positioning tooling, which is installed on the escalator truss through a positioning element, and the step is positioned based on the truss surface. The shortcomings of these two patents are: (1) The distance between the step and the truss is positioned using the truss surface as a reference surface to ensure the relative position of the step and the main wheel of the ladder. This is an indirect positioning method, and it is difficult to ensure the consistency of the distance between each step and the main wheel of the ladder, and the positioning accuracy is poor; (2) Because the escalator truss is long, it is difficult to keep the spacing between the two sides consistent. Therefore, directly using the side of the truss as the positioning reference surface can easily cause deviations between the left and right positions of adjacent steps, resulting in poor step positioning accuracy; the operation is cumbersome, and each step needs to be positioned and installed using a positioning tooling, which increases the risk of cumulative errors.

[0005] Patent CN106475940A proposes a step positioning fixture for an escalator, which positions the steps by installing the first slot or the second slot on the positioning fixture on the chain plate of the step chain. The shortcomings of this patent are: (1) The distance between the step and the truss is positioned using the chain plate of the step chain as the reference plane to ensure the relative position of the step and the main wheel of the ladder path. This is an indirect positioning method with poor positioning accuracy. (2) Because the chain links of the step chain can move, relying on the step chain plate to position the steps will result in insufficient positioning accuracy of the left and right positions of adjacent steps. (3) In particular, when there is a deviation in the step tread width or the processing size of the step claw, there will be a large deviation in the left and right positions of two adjacent steps after installation, resulting in poor step positioning accuracy; the operation is cumbersome, and each step needs to be positioned and installed using a positioning fixture, which increases the risk of cumulative errors.

[0006] Patent CN212403124U proposes a positioning device for installing steps. The first step is pre-installed and adjusted using a positioning tool, and the positioning part of the positioning device is locked in the correct position. The remaining steps are installed and fixed using this positioning part as a reference. The shortcomings of this patent are: (1) The positioning device has a complex structure and is inconvenient to operate during installation and debugging. (2) Especially for escalators with a high lifting height and a large number of steps to be installed, there is a risk of insufficient positioning accuracy and stability of subsequent steps by only locking the positioning device after adjusting the first step. Summary of the invention

[0007] One of the technical problems to be solved by the present invention is to provide a positioning structure for escalator steps in order to address the problems of low step positioning accuracy and low step installation efficiency in the existing installation technology. The positioning structure is a positioning structure that directly locates the distance between the step and the step main wheel, that is, the distance between the step and the step main wheel can be ensured by clamping the step once, thereby solving the problems of low step positioning accuracy and low step installation efficiency in the existing installation technology.

[0008] The second technical problem to be solved by the present invention is to provide an installation method of the positioning structure for escalator steps.

[0009] In order to achieve the above-mentioned purpose of the invention, the present invention provides a positioning structure for escalator steps, comprising: a step front shaft and a step, and a first step chain and a second step chain, characterized in that a first step shaft is provided at a first end of the step front shaft, and the outer diameter of the first step shaft is smaller than the outer diameter of the remaining part of the step front shaft except the first step shaft; the step has a first step claw and a second step claw located on the left and right sides of the step; the first step chain is installed on the end of the first step shaft, and the second step chain is installed on the second end of the step front shaft; and further comprising:

[0010] a separate fixing clip locked on the first step shaft, wherein the separate fixing clip is axially positioned through a step surface between the first step shaft and the remaining portion of the step front shaft except the first step shaft;

[0011] a first step bushing, wherein the first step bushing is sleeved on the first step shaft and is axially positioned by the separate fixing clip, and the first step claw is clamped on the first step bushing and is axially positioned by the first step bushing;

[0012] a first lock buckle locked on the first step shaft, the first lock buckle axially positioning the first step bushing;

[0013] a second step bushing, wherein the second step bushing is sleeved on the second end of the step front shaft, and the second step claw is clamped on the second step bushing;

[0014] A second lock buckle is locked on the step front shaft, and the second lock buckle cooperates with the second step claw to axially position the second step bushing.

[0015] In a preferred embodiment of the present invention, the first step bushing has a first inner hole and a first step outer periphery, the first outer step outer periphery has a first small diameter outer periphery and a first large diameter outer periphery, and a first outer positioning surface is formed between the first small diameter outer periphery and the first large diameter outer periphery; the end surfaces of the first step bushing in the axial direction are respectively the first large positioning end surface and the first small positioning end surface;

[0016] During assembly, the separate fixing clip is sleeved in the first step shaft and axially positioned through the step surface between the first step shaft and the remaining part of the step front shaft except the first step shaft; then the inner hole of the first step bushing is sleeved on the first step shaft, the first large positioning end face of the first step bushing is in contact with the separate fixing clip sleeve, and the first locking buckle is in contact with the first small positioning end face of the first step bushing, and the first step bushing is axially positioned on the step front shaft through the cooperation of the separate fixing clip and the first locking buckle; the first step claw is clamped on the first small diameter outer periphery, and the inner end face of the first step claw is in close contact with the first outer positioning surface, so as to axially position the first step claw.

[0017] In a preferred embodiment of the present invention, the separate fixing clamp is provided with a first separate fixing clamp positioning end face and a second separate fixing clamp positioning end face in the axial direction, the first separate fixing clamp positioning end face is in close contact with the step surface between the first step shaft and the remaining part of the step front shaft except the first step shaft, and the second separate fixing clamp positioning end face is in close contact with the first large positioning end face.

[0018] In a preferred embodiment of the present invention, the split fixing clamp is a radially split two-half structure, divided into two semi-split fixing clamps of the same shape, and the two semi-split fixing clamps are fixed together by two bolts, and the axes of the two bolts are perpendicular to the axis of the split fixing clamp.

[0019] In a preferred embodiment of the present invention, the second step bushing has a second inner hole and a second outer step outer periphery, the second outer step outer periphery has a second small diameter outer periphery and a second large diameter outer periphery, and the second small diameter outer periphery and the second large diameter outer periphery are between a second outer positioning surface; an end surface of the second step bushing in the axial direction is a second large positioning end surface;

[0020] During assembly, the inner hole of the second step bushing is sleeved on the second end of the step front axle, and the second locking buckle contacts the second small positioning end face of the second step bushing, so that the second step bushing is axially positioned on the step front axle; the second step claw is clamped on the second small diameter outer circumference, and the inner end face of the second step claw is in close contact with the second outer positioning face, so as to axially position the second step claw.

[0021] In a preferred embodiment of the present invention, a second step shaft having the same size as the first step shaft is also provided at the second end of the step front shaft.

[0022] As a second aspect of the present invention, a method for installing a positioning structure for escalator steps comprises the following steps:

[0023] Step 1: pre-install the split fixing clip, the first step sleeve, and the first lock buckle onto the first step shaft; pre-install the second lock buckle and the second step sleeve onto the second end of the step front shaft;

[0024] Step 2: The first step chain is installed on the end of the first step shaft, and the second step chain is installed on the second end of the step front shaft, so that the step front shaft, the first step chain and the second step chain are assembled into one body;

[0025] Step 3: Install the first step claw and the second step claw in the step onto the second end of the first step shaft and the step front shaft;

[0026] Step 4: inserting the first small diameter outer periphery of the first step bushing into the first step claw hole of the first step claw so that the inner end surface of the first step claw is in close contact with the first outer positioning surface; inserting the second small diameter outer periphery of the second step bushing into the second step claw hole of the second step claw so that the inner end surface of the second step claw is in close contact with the second outer positioning surface;

[0027] Step 5: Move the split fixing clip so that the first split fixing clip positioning end surface of the split fixing clip is in close contact with the step surface between the first step shaft and the remaining part of the step front shaft except the first step shaft, and then tighten the two bolts to fix the split fixing clip on the first step shaft;

[0028] Step 6: Move the step so that the first large positioning end surface of the first step bushing is in close contact with the positioning end surface of the first separate fixing clip;

[0029] Step 7: Move the first lock buckle so that the first lock buckle is in close contact with the first small positioning end surface of the first step bushing, and then lock the first lock buckle, and use the separate fixing clip to axially position the first step bushing;

[0030] Step eight: Move the second lock buckle so that it is in close contact with the second small positioning end face of the second step bushing, and then lock the second lock buckle, and axially position the second step bushing in combination with the step.

[0031] Due to the adoption of the above technical solution, the positioning structure for the escalator steps of the present invention has the following advantages compared with the step positioning structure in the prior art: first, the positioning structure for the escalator steps is a direct positioning method, relying on the positioning step surface on the front axle of the step to ensure the position of the step and the main wheel of the ladder; second, each step can be clamped once to ensure the distance between the step and the main wheel of the ladder, without repeatedly measuring the distance between the step and the main wheel of the ladder, thereby improving work efficiency and reducing human errors; third, especially for escalators with a large lifting height, due to the large number of steps, the assembly efficiency, accuracy and stability are more significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the positioning structure of the present invention for escalator steps.

[0033] Figure 2 The figure is a schematic diagram of the assembly process of the positioning structure for escalator steps according to the present invention.

[0034] Figure 3 It is a schematic diagram of the ladder structure of the present invention.

[0035] Figure 4 for Figure 3 A-direction view.

[0036] Figure 5 for Figure 3 B view.

[0037] Figure 6 It is a schematic structural diagram of the separate fixing clip of the present invention.

[0038] Figure 7 for Figure 6 Left view of .

[0039] Figure 8 It is a schematic structural diagram of the stepped front axle of the present invention.

[0040] Fig. 9 for Figure 8 An enlarged schematic diagram of point I.

[0041] Fig.10 It is a schematic structural diagram of the first step bushing of the present invention.

[0042] Fig.11 It is a schematic structural diagram of the second step bushing of the present invention. DETAILED DESCRIPTION

[0043] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0044] The present application provides a structural device for escalator step positioning, which improves the step installation positioning accuracy and installation efficiency. For further understanding, the present application is described below in conjunction with the accompanying drawings.

[0045] See also Figures 1 to 11 The positioning structure applied to the escalator steps shown in the figure includes: a step front shaft 10 and a step 20 and a first step chain 31 and a second step chain 32.

[0046] See especially Fig. 9 and Fig.10 A first stepped shaft 11 is machined at the first end of the step front shaft 10 to facilitate accurate positioning of the step. The outer diameter of the first stepped shaft 11 is smaller than the outer diameter of the rest of the step front shaft 10 except the first stepped shaft 11; of course, a second stepped shaft 12 with the same size as the first stepped shaft 11 can also be machined at the second end of the step front shaft 10, which can facilitate assembly and accurate positioning of the step without paying special attention to the direction of the step front shaft 10. There is a step surface 11a between the first stepped shaft 11 and the rest of the step front shaft 10 except the first stepped shaft 11.

[0047] See especially Figures 3 to 5The step 20 has a first step claw 21 and a second step claw 22 located on the left and right sides of the step. The inner end surface 21a of the first step claw 21 and the inner end surface 22a of the second step claw 22 are machined as the positioning surface of the first step claw 21 and the second step claw 22, so as to facilitate accurate positioning of the step.

[0048] See especially Figure 6 and Figure 7 The separate fixing clamp 40 is a radially split two-half structure, divided into two semi-separate fixing clamps 41 and 42 of the same shape. The two semi-separate fixing clamps 41 and 42 are fixed together by two bolts 43 and 44. The axes of the two bolts 43 and 44 are perpendicular to the axis of the separate fixing clamp 40, which facilitates the installation and positioning of the step 20.

[0049] The axial direction of the separate fixing clip 40 is provided with a first separate fixing clip positioning end face 45 and a second separate fixing clip positioning end face 46 .

[0050] Referring in particular to 10, the first step bushing 50 has a first inner hole 51 and a first step outer periphery, the first outer step outer periphery has a first small diameter outer periphery 52 and a first large diameter outer periphery 53, and a first outer positioning surface 54 is formed between the first small diameter outer periphery 52 and the first large diameter outer periphery 53; the end faces of the first step bushing 50 in the axial direction are respectively a first large positioning end face 55 and a first small positioning end face 56.

[0051] See especially Fig.11 The second step bushing 60 has a second inner hole 61 and a first step outer periphery, the first outer step outer periphery has a second small diameter outer periphery 62 and a second large diameter outer periphery 63, and a second outer positioning surface 64 is between the second small diameter outer periphery 62 and the first large diameter outer periphery 63; an end face of the second step bushing 60 in the axial direction is a second large positioning end face 65.

[0052] The first lock buckle 70 and the second lock buckle 80 have the same structure and can be any component with locking and unlocking functions.

[0053] The above-mentioned installation method of the positioning structure applied to the escalator steps comprises the following steps:

[0054] Step 1: pre-install the split fixing clip 40, the first step sleeve 50, and the first lock buckle 70 on the first step shaft 11; pre-install the second lock buckle 80 and the second step sleeve 60 on the second step shaft 12 at the second end of the step front shaft 10. At this time, the bolts 43 and 44 on the split fixing clip 40 do not need to be locked, and the first lock buckle 70 and the second lock buckle 80 do not need to be locked, so as to facilitate the installation of the step 20 in the subsequent process;

[0055] Step 2: Install the first step chain 31 on the end of the first step shaft 11 through the first step main wheel 31a, and install the second step chain 32 on the first step shaft 11 through the second step main wheel 32a, so that the step front shaft 10 is assembled with the first step chain 31 and the second step chain 32 into one body and installed on the truss 90;

[0056] Step 3: Install the first step claw 21 and the second step claw 22 in the step 20 onto the first step shaft 11 and the second step shaft 12, so that the step 20 is installed into the step front shaft 10 through the first step claw 21 and the second step claw 22;

[0057] Step 4: Insert the first small diameter outer periphery 52 of the first step bushing 50 into the first step claw hole 21b of the first step claw 21 so that the inner end surface 21a of the first step claw 21 is in close contact with the first outer positioning surface 54 of the first step bushing 50; insert the second small diameter outer periphery 62 of the second step bushing 60 into the second step claw hole 22b of the second step claw 22 so that the inner end surface 22b of the second step claw 22 is in close contact with the second outer positioning surface 64 of the second step bushing 60;

[0058] Step 5: Move the split fixing clip 40 so that the first split fixing clip positioning end face 45 of the split fixing clip 40 is in close contact with the step surface 11a between the first step shaft 11 and the rest of the step front shaft except the first step shaft 11, and then tighten the two bolts 43 and 44 to fix the split fixing clip 40 on the first step shaft 11;

[0059] Step 6: Move the step 20, and the step 20 drives the first step bushing 50 to move through the first step claw 21, so that the first large positioning end surface 55 in the first step bushing 50 is in close contact with the first separate fixing clip positioning end surface 46;

[0060] Step 7: Move the first lock buckle 70 so that the first lock buckle 70 is in close contact with the first small positioning end surface 56 of the first step bushing 50 and then lock the first lock buckle 70, and use the separate fixing clip 40 to axially position the first step bushing 50 and the first step claw 21 of the step 20;

[0061] Step eight: Move the second lock buckle 80 so that it is in close contact with the second large positioning end surface 65 of the second step bushing 60 and then lock the second lock buckle 80 , and axially position the second step bushing 60 and the second step claw 22 of the step 20 in combination with the step 20 .

[0062] In this embodiment, the key is that the first separate fixing clamp positioning end face 45 of the separate fixing clamp 40 must be in close contact with the step surface 11a between the first step shaft 11 and the remaining part of the step front shaft except the first step shaft 11, so as to ensure the distance between each step and the main wheel of the ladder path, and the distance between the step and the main wheel of the ladder path can be ensured by clamping once.

[0063] The above embodiment only expresses one implementation method of the present application, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent application. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application.

Claims

1. A positioning structure for escalator steps, comprising: The step front shaft and the step and the first step chain and the second step chain are characterized in that a first step shaft is provided at the first end of the step front shaft, and the outer diameter of the first step shaft is smaller than the outer diameter of the remaining part of the step front shaft except the first step shaft; the step has a first step claw and a second step claw located on the left and right sides of the step; the first step chain is installed on the end of the first step shaft, and the second step chain is installed on the second end of the step front shaft; and further includes: a separate fixing clip locked on the first step shaft, wherein the separate fixing clip is axially positioned through a step surface between the first step shaft and the remaining portion of the step front shaft except the first step shaft; a first step bushing, wherein the first step bushing is sleeved on the first step shaft and is axially positioned by the separate fixing clip, and the first step claw is clamped on the first step bushing and is axially positioned by the first step bushing; a first lock buckle locked on the first step shaft, the first lock buckle axially positioning the first step bushing; a second step bushing, wherein the second step bushing is sleeved on the second end of the step front shaft, and the second step claw is clamped on the second step bushing; A second lock buckle is locked on the step front shaft, and the second lock buckle cooperates with the second step claw to axially position the second step bushing.

2. A positioning structure for escalator steps as claimed in claim 1, characterized in that: The first step bushing has a first inner hole and a first step outer periphery, the first step outer periphery has a first small diameter outer periphery and a first large diameter outer periphery, and a first outer positioning surface is formed between the first small diameter outer periphery and the first large diameter outer periphery; the end surfaces of the first step bushing in the axial direction are respectively the first large positioning end surface and the first small positioning end surface; During assembly, the separate fixing clip is sleeved in the first step shaft and axially positioned through the step surface between the first step shaft and the remaining part of the step front shaft except the first step shaft; then the inner hole of the first step bushing is sleeved on the first step shaft, the first large positioning end face of the first step bushing is in contact with the separate fixing clip sleeve, and the first locking buckle is in contact with the first small positioning end face of the first step bushing, and the first step bushing is axially positioned on the step front shaft through the cooperation of the separate fixing clip and the first locking buckle; the first step claw is clamped on the first small diameter outer periphery, and the inner end face of the first step claw is in close contact with the first outer positioning surface, so as to axially position the first step claw.

3. A positioning structure for escalator steps as claimed in claim 2, characterized in that: The separate fixing clamp is provided with a first separate fixing clamp positioning end face and a second separate fixing clamp positioning end face in the axial direction. The first separate fixing clamp positioning end face is in close contact with the step surface between the first step shaft and the remaining part of the step front shaft except the first step shaft, and the second separate fixing clamp positioning end face is in close contact with the first large positioning end face.

4. A positioning structure for escalator steps as claimed in claim 3, characterized in that: The split fixing clamp is a radially split two-half structure, divided into two semi-split fixing clamps of the same shape, the two semi-split fixing clamps are fixed together by two bolts, and the axes of the two bolts are perpendicular to the axis of the split fixing clamp.

5. A positioning structure for escalator steps as claimed in claim 4, characterized in that: The second step bushing has a second inner hole and a second outer step outer periphery, the second outer step outer periphery has a second small diameter outer periphery and a second large diameter outer periphery, and a second outer positioning surface is formed between the second small diameter outer periphery and the second large diameter outer periphery; an end surface of the second step bushing in the axial direction is a second small positioning end surface; During assembly, the inner hole of the second step bushing is sleeved on the second end of the step front axle, and the second locking buckle contacts the second small positioning end face of the second step bushing, so that the second step bushing is axially positioned on the step front axle; the second step claw is clamped on the second small diameter outer circumference, and the inner end face of the second step claw is in close contact with the second outer positioning face, so as to axially position the second step claw.

6. A positioning structure for escalator steps as claimed in claim 5, characterized in that: A second step shaft having the same size as the first step shaft is also provided at the second end of the step front shaft.

7. A method for installing a positioning structure for escalator steps according to claim 6, characterized in that: The steps include: Step 1: pre-install the split fixing clip, the first step sleeve, and the first lock buckle onto the first step shaft; pre-install the second lock buckle and the second step sleeve onto the second end of the step front shaft; Step 2: The first step chain is installed on the end of the first step shaft, and the second step chain is installed on the second end of the step front shaft, so that the step front shaft, the first step chain and the second step chain are assembled into one body; Step 3: Install the first step claw and the second step claw in the step onto the second end of the first step shaft and the step front shaft; Step 4: inserting the first small diameter outer periphery of the first step bushing into the first step claw hole of the first step claw so that the inner end surface of the first step claw is in close contact with the first outer positioning surface; inserting the second small diameter outer periphery of the second step bushing into the second step claw hole of the second step claw so that the inner end surface of the second step claw is in close contact with the second outer positioning surface; Step 5: Move the split fixing clip so that the first split fixing clip positioning end surface of the split fixing clip is in close contact with the step surface between the first step shaft and the remaining part of the step front shaft except the first step shaft, and then tighten the two bolts to fix the split fixing clip on the first step shaft; Step 6: Move the step so that the first large positioning end surface of the first step bushing is in close contact with the positioning end surface of the first separate fixing clip; Step 7: Move the first lock buckle so that the first lock buckle is in close contact with the first small positioning end surface of the first step bushing, and then lock the first lock buckle, and use the separate fixing clip to axially position the first step bushing; Step eight: Move the second lock buckle so that it is in close contact with the second small positioning end face of the second step bushing, and then lock the second lock buckle, and axially position the second step bushing in combination with the step.

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