Lightweight high-strength escalator step

Abstract

The utility model relates to the technical field of escalators, and discloses a light and high-strength escalator step which comprises a step body, a plurality of positioning grooves are transversely formed in the front end face and the upper end face of the step body, anti-skid filler strips are arranged in the positioning grooves, an inclined face is arranged on the lower portion of the rear end face of the step body, and the anti-skid filler strips are arranged on the inclined face. A cavity is formed in the center of the end face of each slope, a framework structure is arranged in the step body on the outer side of the cavity, connecting structures are arranged on the two sides of the slopes on the two sides of the cavity, and lightening holes are formed in the centers of the two side walls of the step body. According to the utility model, the triangular bracket and the connecting rod which are made of polyurethane composite materials are added in the step body to support the step body, so that the strength of the step body is improved, and the overall weight is reduced in cooperation with the two lightening holes and the cavity, so that the weight is light while the high strength is ensured, and the two connecting structures are more stable after being mounted; and the stability and the safety are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of escalators, in particular to a light and high-strength escalator step. Background Art

[0002] As a safe and efficient means of up and down transportation, escalators are widely used in public places such as shopping malls, airports, high-speed railways, and subway stations. Escalator steps are the stair interface on the escalator. They are the components for passengers to stand on and are also the main moving parts when the escalator is in operation. Their performance has an important impact on the quality of the entire escalator and the safety of passengers when standing. The design and manufacture of steps must meet strict safety standards to ensure the safety of passengers when riding escalators.

[0003] At present, escalator steps are mainly made of two materials. One is aluminum alloy, which has good mechanical properties and light weight, but the material cost, equipment cost, and mold cost are high, especially the energy consumption is particularly high. The other is stainless steel, which has lower cost, but average mechanical properties and a complicated manufacturing process. In addition, metal steps often collide or rub against other metal parts during operation, resulting in loud operating noise.

[0004] In order to solve the related problems with metal materials, the prior art has made attempts in the selection of escalator step materials. Patent CN201310234639.1 discloses a method of making a splint using a composite material, which is cross-arranged on the tread and the riser of the escalator step. However, this composite material only has the function of absorbing impact, and those skilled in the art are well aware that the adhesion between the composite material and the metal step is poor, and additional fixing means are needed to prevent the splint from falling off.

[0005] Patent CN201510681276.5 discloses the composition of a fiber-reinforced thermoplastic resin-based composite material that can be used for step manufacturing, but does not disclose the preparation technology and process of the steps. The resin system is a thermoplastic resin, which can only be blended with short-cut fibers but not with continuous fiber cloth or yarn, resulting in the mechanical strength of the material system ultimately used to prepare the steps being difficult to meet the standards. The step structure of this technology follows the existing technology and has not been structurally optimized based on the characteristics of the polyurethane material. In addition, since thermoplastic resins are not heat-resistant, if passengers discard cigarette butts on the steps, it is very easy to cause local permanent damage.

[0006] During the use of existing escalator steps, high strength is required due to the large flow of people, which makes the escalator steps heavy, which is inconvenient during installation and subsequent maintenance. Thermosetting resin composite materials have the advantages of light weight and high strength, and have certain heat resistance. They can be used to improve the structural design of the steps. Therefore, technical personnel in this field provide a lightweight and high-strength escalator step to improve the defects and shortcomings of the existing technology. Utility Model Content

[0007] The purpose of the utility model is to solve the shortcomings existing in the prior art, and to propose a lightweight and high-strength escalator step, which supports the step body by adding two triangular brackets and a plurality of connecting rods made of thermosetting polyurethane composite materials inside the step body, thereby improving the strength of the step body and making it light in weight. In addition, two weight-reducing holes and cavities are used to reduce the overall weight, ensuring high strength while being light in weight, and facilitating transportation during installation and subsequent maintenance.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a lightweight and high-strength escalator step, comprising a step body, a front end face and an upper end face of the step body are both arranged with a plurality of positioning grooves arranged transversely, a plurality of the positioning grooves are provided inside the plurality of the positioning grooves, a slope is provided at the lower part of the rear end face of the step body, a cavity is provided at the center of the slope end face, a skeleton structure is provided inside the step body outside the cavity, connection structures are provided at both sides of the slopes on both sides of the cavity, and weight reduction holes are provided at the center of both side walls of the step body;

[0009] Through the above technical solution, the overall weight is reduced through the weight-reducing holes and cavities, and the overall strength is improved through the skeleton structure. The two connecting structures are more stable after installation, thereby improving stability and safety.

[0010] Further, the connection structure includes a first connection seat, a second connection seat, a first mounting plate, a second mounting plate and two third mounting plates, the first connection seat and the second connection seat are respectively arranged at the upper and lower ends of the inclined surface, the first mounting plate and the second mounting plate are respectively arranged at the upper part of the two side walls of the first connection seat, and the two third mounting plates are respectively arranged on the two side walls of the second connection seat;

[0011] Through the above technical solution, it is convenient to wrap the first connecting seat, the second connecting seat, the first mounting plate, the second mounting plate and the two third mounting plates on the inclined surface of the rear end surface of the step body, so as to make it more stable after installation.

[0012] Furthermore, mounting holes are provided at the upper center of the rear end surface of the first connection seat, the center of the rear end surface of the second connection seat, the center of one end of one side wall of the first mounting plate, the center of one end of one side wall of the second mounting plate, and the center of one end of one side wall of the two third mounting plates;

[0013] Through the above technical solution, it is convenient to fix the first connecting seat and the second connecting seat on the step body through the mounting holes.

[0014] Furthermore, the skeleton structure includes two triangular brackets and a plurality of connecting rods, the two triangular brackets are arranged in a transverse arrangement, and the plurality of connecting rods are respectively arranged at the upper part and the front part between the two triangular brackets;

[0015] Through the above technical solution, the overall strength is improved by using two triangular brackets and multiple connecting rods.

[0016] Furthermore, the plurality of connecting rods are arranged front to back and disposed at the upper part between the two triangular brackets, and arranged up and down and tilted and disposed at the front part between the two triangular brackets;

[0017] Through the above technical solution, it is convenient to make the supporting area more uniform.

[0018] Furthermore, the material of the skeleton structure is a thermosetting polyurethane composite material, and the material of the step body is polyurethane;

[0019] Through the above technical solution, the overall strength is improved by using the polyurethane composite material while reducing the weight. The polyurethane is convenient for shaping and has good bonding properties with the polyurethane composite material and is easy to bond.

[0020] Furthermore, the material of the plurality of anti-slip pad strips is one or more of a metal grid and a polyurethane composite material;

[0021] The above technical solution has stronger wear resistance and longer service life.

[0022] Furthermore, the plurality of anti-slip pads are fixedly connected inside the plurality of positioning grooves by screws;

[0023] The above technical solution makes it easy to install, disassemble and replace multiple anti-slip pads.

[0024] The utility model has the following beneficial effects:

[0025] 1. In the utility model, the lightweight and high-strength escalator steps support the step body by adding two triangular brackets and multiple connecting rods made of polyurethane composite materials inside the step body, thereby improving the strength of the step body while keeping the weight light. In addition, two weight-reducing holes and cavities are used to reduce the overall weight, ensuring high strength while keeping the weight light, which is convenient for transportation during installation and subsequent maintenance.

[0026] 2. In the utility model, two first connecting seats and two second connecting seats are clamped at the two ends of the inclined surface, and then fixed by bolts, and clamped and installed by the first mounting plate, the second mounting plate and the third mounting plate, so as to improve the stability of the connection, reduce the vibration generated during operation, and improve safety.

[0027] 3. In the utility model, during installation, by installing two first connecting seats and two second connecting seats at both ends of the step body, the structure is simpler than before, the installation is more stable, and the production cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A three-dimensional diagram of a lightweight and high-strength escalator step proposed by the utility model;

[0029] Figure 2 This is a three-dimensional cross-sectional view of a lightweight and high-strength escalator step proposed by the utility model;

[0030] Figure 3 A three-dimensional diagram of a lightweight and high-strength escalator step connection structure proposed by the utility model;

[0031] Figure 4 The utility model provides a three-dimensional diagram of a lightweight and high-strength escalator step skeleton structure.

[0032] Legend:

[0033] 1. Step body; 2. Connection structure; 201. First connection seat; 202. Second connection seat; 203. First mounting plate; 204. Second mounting plate; 205. Third mounting plate; 3. Anti-slip pad; 4. Weight reduction hole; 5. Positioning groove; 6. Skeleton structure; 601. Triangular bracket; 602. Connecting rod; 7. Cavity; 8. Inclined surface. DETAILED DESCRIPTION

[0034] 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 in 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.

[0035] Reference Figure 1-4 The utility model provides an embodiment: a lightweight and high-strength escalator step, including a step body 1, a plurality of positioning grooves 5 are arranged horizontally on the front end face and the upper end face of the step body 1, and anti-slip pads 3 are arranged inside the plurality of positioning grooves 5, an inclined surface 8 is arranged at the lower part of the rear end face of the step body 1, a cavity 7 is arranged at the center of the end face of the inclined surface 8, a skeleton structure 6 is arranged inside the step body 1 outside the cavity 7, and the overall strength is improved by the skeleton structure 6, connecting structures 2 are arranged on both sides of the inclined surface 8 on both sides of the cavity 7, and the two connecting structures 2 are more stable after installation, improving stability and safety, and weight reduction holes 4 are arranged at the center of the two side walls of the step body 1, and the overall weight is reduced by the weight reduction holes 4 and the cavity 7.

[0036] The connection structure 2 includes a first connection seat 201, a second connection seat 202, a first mounting plate 203, a second mounting plate 204 and two third mounting plates 205. The first connection seat 201 and the second connection seat 202 are respectively arranged at the upper and lower ends of the inclined surface 8, the first mounting plate 203 and the second mounting plate 204 are respectively arranged at the upper side walls of the first connection seat 201, and the two third mounting plates 205 are respectively arranged on the side walls of the second connection seat 202, so as to facilitate the connection between the first connection seat 201, the second connection seat 202, the first mounting plate 203 and the second mounting plate 204. 03. The second mounting plate 204 and the two third mounting plates 205 are wrapped on the inclined surface 8 of the rear end face of the step body 1, so as to make it more stable after installation. Mounting holes are provided at the upper center of the rear end face of the first connecting seat 201, the center of the rear end face of the second connecting seat 202, the center of one end of one side wall of the first mounting plate 203, the center of one end of one side wall of the second mounting plate 204, and the center of one end of one side wall of the two third mounting plates 205, so as to fix the first connecting seat 201 and the second connecting seat 202 on the step body 1 through the mounting holes.

[0037] The skeleton structure 6 includes two triangular brackets 601 and a plurality of connecting rods 602. The two triangular brackets 601 are arranged horizontally, and the plurality of connecting rods 602 are respectively arranged at the top and the front between the two triangular brackets 601. The overall strength is improved by the two triangular brackets 601 and the plurality of connecting rods 602. The plurality of connecting rods 602 are respectively arranged front to back at the top between the two triangular brackets 601 and arranged up and down obliquely at the front between the two triangular brackets 601, so as to make the supporting area more uniform.

[0038] The material of the skeleton structure 6 is polyurethane composite material, and the material of the step body 1 is polyurethane. The polyurethane composite material is used to improve the overall strength and reduce the weight. Polyurethane is convenient for shaping. The material of the multiple anti-slip pads 3 is metal mesh, which has stronger wear resistance and increases the service life. The multiple anti-slip pads 3 are fixedly connected to the inside of the multiple positioning grooves 5 by screws, which is convenient for the installation, disassembly and replacement of the multiple anti-slip pads 3.

[0039] Working principle: two triangular brackets 601 and a plurality of connecting rods 602 made of polyurethane composite materials are added inside the step body 1 to support the step body 1, thereby improving the strength of the step body 1 while keeping the weight light. In combination with the two weight-reducing holes 4 and the cavity 7, the overall weight is reduced, ensuring high strength while keeping the weight light, making it convenient to carry during installation and for subsequent maintenance. The two first connecting seats 201 and the two second connecting seats 202 are clamped at the two ends of the inclined surface 8 and then fixed with bolts. The first mounting plate 203, the second mounting plate 204 and the third mounting plate 205 are used for clamping and installation, thereby improving the stability of the connection, reducing the vibration generated during operation and improving safety. During installation, the two first connecting seats 201 and the two second connecting seats 202 are installed at the two ends of the step body 1. The structure is simpler than before, the installation is more stable and the production cost is lower.

[0040] In the utility model, the method of making a triangular bracket using a polyurethane composite material and the strength test data of the polyurethane composite material are as follows:

[0041] Preparation Materials 1:

[0042] Step 1: Clean the mold, apply external release agent and heat to 100°C;

[0043] Step 2: Use the method of mixing first to mix the curable nylon resin base, chopped basalt fiber and other additives and fillers evenly, and add them into the mold by weight to ensure that the raw materials can fill all corners under the action of pressure;

[0044] Step 3: close the mold and apply pressure to solidify the resin;

[0045] Step 4: Demoulding, trimming and assembly.

[0046] Preparation Materials 2:

[0047] Step 1: Clean the mold, apply external release agent and heat to 135°C;

[0048] Step 2: Cut the commercially available short-cut glass fiber reinforced unsaturated polyester resin-based SMC sheet into a mold according to weight, and lay a layer of commercially available continuous carbon fiber cloth reinforced polyurethane resin-based prepreg on top of the sheet;

[0049] Step 3: close the mold and apply pressure to solidify the resin;

[0050] Step 4: Demoulding, trimming and assembly.

[0051] Preparation Materials 3:

[0052] Step 1: Clean the mold, apply external release agent and heat to 220℃;

[0053] Step 2: Cut the commercially available short-cut aramid fiber reinforced phenolic resin-based SMC sheet according to weight and put it into the mold, and then lay a layer of commercially available continuous aramid fiber cloth reinforced epoxy resin-based prepreg on top of the sheet;

[0054] Step 3: close the mold and apply pressure to solidify the resin;

[0055] Step 4: Demoulding, trimming and assembly.

[0056] Preparation Materials 4:

[0057] Step 1: Clean the mold, apply external release agent and heat to 145°C;

[0058] Step 2: Cut the commercially available long-cut carbon fiber reinforced unsaturated polyester resin-based BMC sheet into a mold according to weight, and lay a layer of commercially available continuous ultra-high molecular weight polyethylene fiber cloth reinforced vinyl resin-based prepreg on top of the sheet;

[0059] Step 3: close the mold and apply pressure to solidify the resin;

[0060] Step 4: Demoulding, trimming and assembly.

[0061] Material 5 Commercially available aluminum alloy steps:

[0062] Table 1: Performance tests of different materials

[0063]

[0064] It can be seen from the test data in Table 1 that the composite materials (materials 2, 3 and 4) prepared by thermosetting polyurethane and fiber in the utility model are significantly superior to the traditional aluminum alloy material (material 5) and fiber-reinforced thermoplastic resin composite material (material 1) in terms of material performance.

[0065] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lightweight and high-strength escalator step, comprising a step body (1), characterized in that: The front end face and the upper end face of the step body (1) are both laterally arranged with a plurality of positioning grooves (5), and the plurality of positioning grooves (5) are each provided with an anti-slip pad strip (3). A slope (8) is provided at the lower portion of the rear end face of the step body (1), and a cavity (7) is provided at the center of the end face of the slope (8). A skeleton structure (6) is provided inside the step body (1) outside the cavity (7), and connection structures (2) are provided at both sides of the slopes (8) on both sides of the cavity (7), and a weight reduction hole (4) is provided at the center of both side walls of the step body (1).

2. A lightweight and high-strength escalator step according to claim 1, characterized in that: The connection structure (2) comprises a first connection seat (201), a second connection seat (202), a first mounting plate (203), a second mounting plate (204) and two third mounting plates (205); the first connection seat (201) and the second connection seat (202) are respectively arranged at the upper and lower ends of the inclined surface (8); the first mounting plate (203) and the second mounting plate (204) are respectively arranged at the upper part of the two side walls of the first connection seat (201); and the two third mounting plates (205) are respectively arranged on the two side walls of the second connection seat (202).

3. A lightweight and high-strength escalator step according to claim 2, characterized in that: Mounting holes are provided at the upper center of the rear end surface of the first connecting seat (201), at the center of the rear end surface of the second connecting seat (202), at the center of one end of one side wall of the first mounting plate (203), at the center of one end of one side wall of the second mounting plate (204), and at the center of one end of one side wall of the two third mounting plates (205).

4. The lightweight and high-strength escalator step according to claim 1, characterized in that: The skeleton structure (6) comprises two triangular supports (601) and a plurality of connecting rods (602); the two triangular supports (601) are arranged in a transverse arrangement, and the plurality of connecting rods (602) are respectively arranged at the upper part and the front part between the two triangular supports (601).

5. A lightweight and high-strength escalator step according to claim 4, characterized in that: The plurality of connecting rods (602) are respectively arranged front to back at the upper part between the two triangular brackets (601) and arranged up and down obliquely at the front part between the two triangular brackets (601).

6. A lightweight and high-strength escalator step according to claim 1, characterized in that: The material of the skeleton structure (6) is a polyurethane composite material, and the material of the step body (1) is polyurethane.

7. The lightweight and high-strength escalator step according to claim 1, characterized in that: The material of the plurality of anti-slip pad strips (3) is a metal grid.

8. The lightweight and high-strength escalator step according to claim 1, characterized in that: The plurality of anti-slip pad strips (3) are fixedly connected inside the plurality of positioning grooves (5) by means of screws.

Images