Handrail strap made of economical PVC (polyvinyl chloride) material

Abstract

The utility model discloses a hand strap made of economic material PVC (polyvinyl chloride), which comprises an outer PVC layer, the outer PVC layer is annular, an inner PVC layer is fixed on the inner wall of the outer PVC layer in a welding manner, a reinforcing steel wire is mounted in the inner PVC layer, and a canvas sliding layer is fixed on the inner wall of the inner PVC layer. According to the hand strap made of the economical PVC material, the inner PVC layer and the reinforcing steel wires are arranged, so that when the hand strap works, the PVC material is processed into a main body material of the hand strap, PVC can be recycled like TPU, and the price of PVC is low, so that the hand strap saves the cost, facilitates recycling and improves the environmental protection property, and the hand strap made of the economical PVC material is suitable for popularization and application. The overall tensile strength of the device is mainly provided by the reinforcing steel wires, so that the durability of the device is improved, PVC has good fire resistance, the water resistance of PVC is better than that of TPU, the fire resistance of PVC is better than that of TPU, and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of escalators, in particular to a handrail belt made of economical material PVC. Background Art

[0002] An escalator, also known as an automatic escalator, or an automatic pedestrian elevator, a handrail elevator, or an escalator, is a type of escalator with a circular running step. It is a fixed electric drive device used to transport passengers upward or downward. The electric escalator is generally inclined. When pedestrians stand on the automatic steps at one end of the escalator, they will be automatically taken to the other end of the escalator. The steps will remain level all the way. The handrail is provided with handrails on both sides that move synchronously with the steps for users to hold. The handrail belt is located on the top surface of the handrail device, and runs synchronously with the steps, pedals or tapes for passengers to hold on to.

[0003] Existing escalator handrails mainly include thermoplastic elastomer polyurethane TPU handrails and rubber handrails. Among them, TPU handrails are plastic handrails with very good mechanical properties, but they are expensive and prone to delamination and cracking, resulting in a reduced service life, which is not conducive to improving practicality. Utility Model Content

[0004] The purpose of the utility model is to provide a handrail belt made of economical material PVC, so as to solve the problem that the TPU handrail belt proposed in the above background technology is high in cost and easy to delaminate and crack, resulting in a reduced service life.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a handrail belt made of economical material PVC, comprising an outer PVC layer, which is a ring-shaped design, an inner PVC layer is welded and fixed to the inner wall of the outer PVC layer, a reinforcing steel wire is installed inside the inner PVC layer, and a canvas sliding layer is fixed to the inner wall of the inner PVC layer.

[0006] Preferably, both ends of the outer PVC layer are designed to be arc-shaped, and an opening is provided at the lower end of the outer PVC layer, and the inner wall of the opening at the lower end of the outer PVC layer is designed to be inclined.

[0007] By adopting the above technical solution, the arc-shaped design at both ends of the outer PVC layer facilitates the outer PVC layer to fit closely with the inner PVC layer, and the opening of the outer PVC layer facilitates the installation and fixation of the device.

[0008] Preferably, both ends of the inner PVC layer are designed to be arc-shaped, and an opening is provided at the lower end of the inner PVC layer, and the inner wall of the opening at the lower end of the inner PVC layer is designed to be vertical.

[0009] By adopting the above technical solution, the arc-shaped design at both ends of the inner PVC layer facilitates the close fit between the inner PVC layer and the canvas sliding layer, and the opening at the lower end of the inner PVC layer facilitates the installation and fixation of the device.

[0010] Preferably, the reinforcing steel wires inside the inner PVC layer are evenly distributed along a straight line, the shape of the canvas sliding layer is the same as the inner wall shape of the inner PVC layer, and the outer PVC layer and the inner PVC layer are extruded by an extruder and coated on the surface of the reinforcing steel wires and the canvas sliding layer.

[0011] By adopting the above technical solution, multiple reinforcing steel wires are evenly distributed along a straight line, so that the reinforcing steel wires can strengthen the overall strength of the inner PVC layer, and the friction between the handrail and the slide rail is adjusted through the canvas sliding layer.

[0012] Preferably, a fastening mechanism is provided at the lower end of the canvas sliding layer, which forms a fastening angle with the auxiliary installation edge through the positioning bevel edge.

[0013] By adopting the above technical solution, the connection stability between the outer PVC layer, the inner PVC layer and the canvas sliding layer can be improved through the lower end fastening mechanism of the canvas sliding layer.

[0014] Preferably, the fastening mechanism includes a canvas sliding layer, the lower end of which is fixedly connected to two auxiliary mounting edges, the lower end of the canvas sliding layer is provided with a positioning bevel fixed to the side wall of the auxiliary mounting edge, and a fastening angle is formed between the side surface of the auxiliary mounting edge and the positioning bevel.

[0015] By adopting the above technical solution, the lower end of the canvas sliding layer is fixed through the auxiliary installation edge, and then the auxiliary installation edge is connected and fixed through the inclined positioning bevel, so as to form a fastening angle for processing.

[0016] Preferably, the canvas sliding layer, auxiliary mounting edge and positioning bevel edge are all made of the same material, the auxiliary mounting edge is fixedly connected to the lower end of the inner PVC layer, the inclined surface of the outer PVC layer is fitted with the outer surface of the positioning bevel edge, and the lower end of the inner PVC layer extends into the fastening angle.

[0017] By adopting the above technical solution, the outer PVC layer and the inner PVC layer are extruded and coated on the surface of the auxiliary installation edge and the positioning bevel edge, so that the inner PVC layer extends into the fastening angle for shaping.

[0018] Compared with the prior art, the utility model has the following beneficial effects: the handrail made of the economical material PVC:

[0019] 1. An inner PVC layer and a reinforcing steel wire are provided, so that when the device is working, the PVC material is processed, and the PVC can be recycled like TPU, and the price of PVC is relatively low, which not only saves costs but also is environmentally friendly. The overall tensile strength of the device is mainly provided by the reinforcing steel wire, which improves the durability of the device. PVC also has good fire resistance, its water resistance is better than TPU, and its flame retardancy is also better than TPU, which improves the practicality of the device;

[0020] 2. A positioning bevel and an auxiliary installation edge are provided, so that when the device is working, the auxiliary installation edge is convenient for positioning and installing the device and the slide rail, and the inner PVC layer is convenient for extending and fixing through the fastening angle, thereby increasing the contact area between the inner PVC layer and the outer PVC layer and the positioning bevel and the auxiliary installation edge during the production of the device, thereby improving the fastening stability of the device and increasing the strength of the device;

[0021] 3. A canvas sliding layer and an outer PVC layer are provided, so that when the device is working, the outer PVC layer can protect the inside of the device, and the wear and tear will not affect the work of the internal reinforcing steel wire and the canvas sliding layer. The canvas sliding layer can be used to easily adjust the friction between the device and the slide rail, thereby facilitating the use of the device and improving its applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall front cross-sectional structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the overall side sectional structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the overall top view structure of the utility model;

[0025] Figure 4 It is a schematic diagram of the three-dimensional structure of the canvas sliding layer and the auxiliary installation edge connected to the utility model.

[0026] In the figure: 1. Outer PVC layer; 2. Inner PVC layer; 3. Reinforcement steel wire; 4. Canvas sliding layer; 5. Auxiliary installation edge; 6. Positioning bevel edge; 7. Fastening angle. DETAILED DESCRIPTION

[0027] 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.

[0028] See also Figure 1-4 The utility model provides a technical solution: a handrail belt made of economical material PVC, comprising an outer PVC layer 1, an inner PVC layer 2, a reinforcing steel wire 3, a canvas sliding layer 4, an auxiliary mounting edge 5, a positioning bevel 6 and a fastening angle 7. The outer PVC layer 1 is annular in design, and the inner wall of the outer PVC layer 1 is welded and fixed with the inner PVC layer 2, the inner part of the inner PVC layer 2 is installed with a reinforcing steel wire 3, and the inner wall of the inner PVC layer 2 is fixed with a canvas sliding layer 4. When using this device, firstly, two auxiliary mounting edges 5 are fixedly connected to the lower end of the canvas sliding layer 4, and the positioning bevel 6 is fixedly connected to the outer surface of the auxiliary mounting edge 5.

[0029] The two ends of the outer PVC layer 1 are designed to be arc-shaped, and an opening is set at the lower end of the outer PVC layer 1. The inner wall of the opening at the lower end of the outer PVC layer 1 is designed to be inclined, so that the cavity between the auxiliary installation edge 5 and the positioning bevel edge 6 forms a fastening angle 7.

[0030] The two ends of the inner PVC layer 2 are designed to be arc-shaped, and an opening is provided at the lower end of the inner PVC layer 2. The inner wall of the opening at the lower end of the inner PVC layer 2 is designed to be vertical. The PVC material is then extruded through an extruder and coated on the outer surface of the canvas sliding layer 4, the auxiliary installation edge 5, the positioning bevel 6 and the reinforcing steel wire 3, thereby forming an outer PVC layer 1 and an inner PVC layer 2.

[0031] The reinforcing steel wires 3 inside the inner PVC layer 2 are evenly distributed along a straight line, and the shape of the canvas sliding layer 4 is the same as the inner wall shape of the inner PVC layer 2. The outer PVC layer 1 and the inner PVC layer 2 are extruded by the extruder and coated on the surface of the reinforcing steel wires 3 and the canvas sliding layer 4. When installing the device, the opening at the lower end of the device is matched with the slide rail, and the two auxiliary installation edges 5 are used to facilitate the positioning of the device, thereby improving the smoothness of the installation. During operation, the friction between the device and the slide rail is adjusted through the canvas sliding layer 4 to reduce the wear of the device and extend its service life.

[0032] A fastening mechanism is provided at the lower end of the canvas sliding layer 4, which forms a fastening angle 7 with the auxiliary installation edge 5 through the positioning bevel edge 6, and is fixed to the inclined surface of the outer PVC layer 1 through the positioning bevel edge 6, thereby increasing the contact area of ​​the outer PVC layer 1 and thus improving the connection stability. The internal parts of the device are protected by the outer PVC layer 1, thereby improving practicality.

[0033] The fastening mechanism includes a canvas sliding layer 4, the lower end of which is fixedly connected with two auxiliary mounting edges 5, and the lower end of the canvas sliding layer 4 is provided with a positioning bevel 6 fixed to the side wall of the auxiliary mounting edge 5, and a fastening angle 7 is formed between the side of the auxiliary mounting edge 5 and the positioning bevel 6. As the inner PVC layer 2 is wrapped, the inner PVC layer 2 extends into the fastening angle 7, which facilitates the inner PVC layer 2 to fit the fastening angle 7, thereby greatly increasing the installation area of ​​the inner PVC layer 2, improving the stability of the connection of the inner PVC layer 2, and after the inner PVC layer 2 is cured, the overall strength of the device is improved by the clamping of the inner PVC layer 2 by the fastening angle 7.

[0034] The canvas sliding layer 4, the auxiliary mounting edge 5 and the positioning bevel edge 6 are all made of the same material. The auxiliary mounting edge 5 is fixedly connected to the lower end of the inner PVC layer 2. The inclined surface of the outer PVC layer 1 fits with the outer surface of the positioning bevel edge 6. The lower end of the inner PVC layer 2 extends into the fastening angle 7. The overall tensile strength of the device is increased by reinforcing the steel wire 3, preventing the device from bending and breaking, and improving practicality.

[0035] Processing process:

[0036] Step 1: Selection and drying of PVC: Select soft PVC that can come into contact with the human body and has good hygienic properties, and add it to the drying material on the extruder for drying;

[0037] Step 2, passing the steel wire through the glue coating machine and the extrusion line to implement online glue coating;

[0038] Step 3: The glue-coated steel wire passes through a heating drying tunnel to dry the solvent in the glue;

[0039] Step 4, heating the PVC into a melt through an extruder and extruding it through an extrusion die, and then coating the steel wire and the cord fabric according to the schematic diagram structure;

[0040] Step 5, the processed handrail belt is pulled by a traction machine through a cooling water tank for cooling;

[0041] Step 6: After cooling, cut the handrail into the required length using a cutting machine according to production needs;

[0042] Step 7: mold and splice the two ends of the handrail of the required length to form a neat and closed ring handrail finished product, which can be used for escalator installation.

[0043] Furthermore, in step 1, 85A PVC for automobile seat leather is used as the outer layer material of the armrest, and 90A PVC is used as the inner layer material of the armrest. The drying temperature is set at about 65°C to 75°C, and the drying time is about 2 hours.

[0044] Further, epoxy resin glue is used in step 2;

[0045] Furthermore, in step 3, the glue drying is set at about 300°C to 400°C, and the drying tunnel length is matched according to the extrusion speed, so that the drying time is 40 to 60 seconds;

[0046] Furthermore, in step 4, the extruder temperature is set at about 130° C. to 170° C. to ensure that the peel strength between the PVC melt and the canvas layer and the steel wire layer is ≥5N / mm;

[0047] Furthermore, in step 7, the molding temperature is set to 140° C. to 170° C., the pressure is set to 3 MPA to 10 MPA, and the molding time is 10 min to 20 min so that the PVC materials at both ends of the splicing area are completely melted into one.

[0048] Working principle: When using the handrail made of the economical material PVC, the PVC material is first extruded and then coated on the outer surface of the canvas sliding layer 4, the auxiliary installation edge 5, the positioning bevel 6 and the reinforcing steel wire 3, thereby forming an outer PVC layer 1 and an inner PVC layer 2. The installation area of ​​the inner PVC layer 2 is increased by extending the inner PVC layer 2 into the fastening angle 7, and the firmness is further increased by fitting the outer PVC layer 1 with the positioning bevel 6. The overall tensile strength of the device is increased by reinforcing the steel wire 3. The opening at the lower end of the device is convenient for installation with the slide rail, and the auxiliary installation edge 5 improves the smoothness of installation, thereby increasing the overall practicality.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated 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 that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A handrail made of economical material PVC, comprising an outer PVC layer (1) which is of an annular design, characterized in that: An inner PVC layer (2) is welded and fixed to the inner wall of the outer PVC layer (1), a reinforcing steel wire (3) is installed inside the inner PVC layer (2), and a canvas sliding layer (4) is fixed to the inner wall of the inner PVC layer (2).

2. The economical PVC handrail according to claim 1, characterized in that: The two ends of the outer PVC layer (1) are designed to be arc-shaped, and the lower end of the outer PVC layer (1) is provided with an opening, and the inner wall of the opening at the lower end of the outer PVC layer (1) is designed to be inclined.

3. The economical PVC handrail according to claim 1, characterized in that: The two ends of the inner PVC layer (2) are designed to be arc-shaped, and the lower end of the inner PVC layer (2) is provided with an opening, and the inner wall of the opening at the lower end of the inner PVC layer (2) is designed to be vertical.

4. The economical PVC handrail according to claim 1, characterized in that: The reinforcing steel wires (3) inside the inner PVC layer (2) are evenly distributed along a straight line, the shape of the canvas sliding layer (4) is the same as the inner wall shape of the inner PVC layer (2), and the outer PVC layer (1) and the inner PVC layer (2) are extruded by an extruder and coated on the surface of the reinforcing steel wires (3) and the canvas sliding layer (4).

5. The economical PVC handrail according to claim 1, characterized in that: A fastening mechanism is provided at the lower end of the canvas sliding layer (4), which forms a fastening angle (7) with the auxiliary installation edge (5) through the positioning bevel edge (6).

6. The economical PVC handrail according to claim 5, characterized in that: The fastening mechanism comprises a canvas sliding layer (4), the lower end of which is fixedly connected to two auxiliary mounting edges (5), the lower end of which is provided with a positioning bevel (6) fixed to the side wall of the auxiliary mounting edge (5), and a fastening angle (7) is formed between the side surface of the auxiliary mounting edge (5) and the positioning bevel (6).

7. The economical PVC handrail according to claim 6, characterized in that: The canvas sliding layer (4), the auxiliary mounting edge (5) and the positioning bevel edge (6) are all made of the same material; the auxiliary mounting edge (5) is fixedly connected to the lower end of the inner PVC layer (2); the inclined surface of the outer PVC layer (1) is in contact with the outer surface of the positioning bevel edge (6); and the lower end of the inner PVC layer (2) extends into the fastening angle (7).

Images