KR102089492B1 - Process for joining handrail without disassembling escalator - Google Patents

Abstract

According to one embodiment, a process for bonding separated handrails is disclosed, and particularly, a process capable of accurately bonding two handrails without completely disassembling the handrail made of a thermoplastic carbon polymer composition.

Description

Process for joining handrail without disassembling escalator}

The present invention relates to a process of joining an existing handrail and a new handrail installed on an escalator in the field, and more particularly, to a field joining process connecting an existing handrail and a new handrail without disassembling the escalator machine itself.

The escalator is a type of conveyor, and it is also called an automatic staircase as a device that continuously lifts and descends people by driving stairs that rotate by power. Escalators are routinely installed in buildings of a certain size or more, and provide convenience for people to move. The escalator is equipped with a handle structure such as a hand rail, so that the person using it can safely move by relying on the body.

In general, when the handrail installed on the escalator was completely replaced or partially replaced, the power part of the escalator had to be disassembled to replace the new handrail. However, the process of disassembling the power part of the escalator unnecessarily in the process of replacing the hand rail took a lot of time, thus causing inconvenience to the user.

Therefore, when only the handrail is replaced in the field, the need for a method of replacing the handrail without releasing the front portion of the driving escalator has increased.

Republic of Korea Utility Model Publication No. 20-2000-0006185

The present invention is to solve the above-described problems, it is possible to provide a process of joining only the handrail without disassembling all of the escalator machine in the field process of joining the existing handrail and the new handrail.

According to one disclosure, a process of joining a handrail without disassembling the escalator is provided, and this process cuts a part of the first handrail mounted on the escalator device in a stopped state, and cuts the first handrail It is possible to provide a first handrail extraction process to take the end of the outside.

In addition, this process is the first handrail cover separation process of cutting the side surface of the cover of the first handrail to a point 275mm from the end of the first handrail to a depth of 10-20mm, and rolling up the cover of the cut first handrail Can provide

In addition, in order to separate the wire set consisting of 20 subwires installed under the cover of the first handrail, the side surface of the wire set is cut to a point 270 mm from the end at a depth of 1 mm, and the cut wire set is placed on the cover. A rolled wire separation process can be provided.

The process also returns the separated wireset to its original position, cuts a pair of first subwiresets of the 20 subwires included in the wireset to a point of 250 mm from the end of the wireset, and a pair of first subs A pair of second subwiresets located next to the wireset is cut from the end of the wireset to a point of 188 mm, and a pair of third subwiresets located next to the pair of second subwiresets is placed at the end of the wireset Cut the wire set in the top shape by cutting from the end of the wire set to the point of 125 mm from the end of the wire set, cutting the wire set cut into the top shape onto the cover. Can provide.

In addition, the present invention provides a slider separation process for cutting the slider from the rubber guard by cutting along a point at a predetermined distance from both edges of the slider located at the bottom of the separated wire, and cutting the slider to a point of 125 mm from the end of the slider. You can.

In addition, this process provides a second handrail coupling process for separating the cover of the second handrail, separating the wire set, separating the sub-wire into a reverse tower shape, and separating the slider to make contact with the first handrail. can do.

In addition, this process applies heat to the part where the second handrail and the first handrail abut using a central molding part, so that the thermoplastic material constituting the first handrail and the second handrail is melted to form a Mushroom joint. When the joint is formed 2-3 mm, it is possible to provide a welding process that stops the operation of the central forming part.

In addition, the present process may provide a cooling process for cooling the combined first and second handrails through a welding process.

In addition, in the present process, the top hand wire set of the first hand rail is placed over the first handle rail and the second hand rail, and the reverse hand tower wire set of the second hand rail is placed on the second hand rail and the first hand rail. It is possible to provide a wire bonding process in which the wire set of the first handrail and the wire set of the second handrail are brought into contact with each other by being placed across.

In addition, this process applies the heat of 300 ° C to the lower end of the wire set of the first handrail and the wire set of the second handrail, and at the same time, the wire set of the first handrail and the wire of the second handrail to which heat is applied. Rolling the set with a roller can provide a wire welding process to be coupled to the slider.

In addition, this process covers the cover of the first handrail and the cover of the second handrail on the wire set of the combined first handrail and the wire set of the second handrail, and then the cover of the first handrail and the second hand Provides a cover welding process for forming a cover joint by fusing and bonding the cover of the first handrail and the cover of the second handrail by applying a temperature above the melting point according to the material of the cover of the rail, and then cooling at a temperature below the melting point can do.

In addition, this process removes the Mushroom joint formed at the lower end of the first handrail and the second handrail with the cover joint, and removes the Mushroom joint by applying heat of 300 to 350 ° C for 1 minute to the portion where the Mushroom joint is removed. It is possible to provide a mashroom joint removal process that melts and recombines the portions.

In addition, the present process may provide a molding process for molding the combined first and second handrails.

It is possible to provide a process of inserting the first handrail and the second handrail combined by one disclosure into the escalator machine, and extracting the other end of the cut first handrail to the outside by applying a predetermined force.

It is possible to provide a process of removing a deteriorated portion of the first handrail by cutting a predetermined length according to a user's input among the first handrail extracted to the outside by one start. It is possible to provide an endless rail forming process for joining the other ends of the first handrail and the second handrail from which the old part is removed by one start.

1 is a view for explaining an escalator installed by one disclosure.
2 is a view for explaining the driving of the escalator by one disclosure.
3 is a perspective view of a band saw for cutting the hand rail.
4 is a view showing a continuous cutting process for one end of the handrail.
5 is a view showing a handrail end before cutting and forming a weaving pattern at the end of the handrail.
6 is a perspective view of the two ends of the handrail, showing cut forming of the weave pattern.
Fig. 7 is a perspective view showing the assembly of the two molded ends and the mandrel molding of the device of the present invention.
8 is a perspective view of the device of the present invention in an open state.
9 is a side view of the device of the present invention.
10 is a plan view of the inventive device showing cooling paths.
11 is a perspective view of the apparatus of the present invention installed inside the press.
12 is a flowchart for explaining a process of joining a handrail without disassembling the escalator according to one disclosure.
13 is a view showing that a separated sub-wire according to one disclosure is cut into a tower shape.
14 is a view showing a state in which a subwire of a first handrail and a subwire of a second handrail are combined according to one disclosure.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains may easily practice. However, the present invention can be implemented in many different forms and is not limited to the embodiments disclosed below. In addition, in order to clearly disclose the present invention in the drawings, parts not related to the present invention are omitted, and the same or similar reference numerals in the drawings indicate the same or similar components.

The objects and effects of the present invention may be naturally understood or more apparent by the following description, and the objects and effects of the present invention are not limited only by the following description.

The objects, features and advantages of the present invention will become more apparent through the following detailed description. In addition, in the description of the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a view for explaining an escalator installed by one disclosure.

As shown in FIG. 1, a conventional escalator includes steps 100 for transporting passengers while circulating a certain track, handrails 300 installed on both sides of the steps 100 and serving as handles, and the steps It comprises a driving device 500 for driving the (100) and the hand rail (300).

When the escalator configured as described above operates the driving device 500, the step 100 and the handrail 300 circulate at a constant speed along a certain track and transport passengers. Therefore, passengers on the escalator can safely move to the destination if they hold the handrail 300 only.

Referring to FIG. 2, the escalator includes a driving unit 10 that generates a driving force required to transport passengers and the like to a target floor, and a step unit 20 that circulates a predetermined trajectory by the driving unit 10 so that the passengers, etc., climb and transfer. ), And a handrail part 30 circulating a predetermined trajectory by the driving part 10 together with the step part 20 so as to serve as a handle of a passenger who climbs the step part 20.

The driving unit 10 includes a driving motor 11 as a driving source, a reduction gear 12 for adjusting the rotational speed of the driving motor 11, and a driving shaft 14a installed in parallel with the axis of the reduction gear 12. A plurality of drive terminal gears 14A and sprockets (unsigned) integrally mounted on both ends to receive the driving force generated from the reduction gear 12 by the drive chain 13 and the drive terminal gears 14A. The driven terminal gear 14B respectively installed on the lower step side of the step portion 20 to be coupled to the step chain 15, and the handrail chain 16 on the other sprocket of the drive terminal gear 14A. Sprockets (unsigned) connected to each other are integrally rotated, and a plurality of drive pulleys 17 generating power for driving the handrail 31, and a normal right triangle in the lower half of the drive pulley 17 Handrail 31 is installed on the outer circumferential surface of the driving pulley 17 The driving belt 19a that is in close contact with each other so as to be fitted is wound, and includes a plurality of driving rollers 19 which are rotated by the driving pulley 17.

The handrail 30 is a handrail 31 that is fitted to be compressed between the outer circumferential surface of the drive pulley 17 and the outer circumferential surface of the drive belt 19a, and the handrail 31 rotates while maintaining a certain trajectory. It consists of a handrail guide 32 to guide the support.

In the drawing, 31a, which is not described, is a handrail inner skin and 31b is a handrail outer skin.

The driving method of the handrail part is a method using a pulley and a belt as shown in FIG. 2, a method using a narrow pressure of a roller (not shown), and using the tension of the handrail by placing the pulley on the terminal portion of the handrail. It is divided into a method (not shown), and the driving method of all these handrails is that the inner rail of the handrail and the frictional force of a roller or pulley are used.

In the driving method of the handrail unit, since all three methods previously proposed for the driving resistance reduction structure of the handrail, which is the scope of the present invention, are roughly the same, a method using a pulley and a belt will be described below as a typical example.

That is, when the drive motor 11 and the reducer 12 of the drive unit 10 start operating, the drive terminal gear 14A connected to the reducer 12 rotates, and the drive terminal gear 14A The step chain 13 moves each step (unsigned) by the rotation of the drive rail, and the driving pulley 17 for the handrail is rotated by the driving terminal gear 14A. On the outer circumferential surface of (17), the driving belt 19a wound on each driving roller 19 is pressed while the handrail 31 is fitted, so that the handrail 31 circulates along a certain trajectory.

As described above, the driving method of the handrail uses frictional force between the inner skin 31a of the handrail 31 and the roller 19 or pulley 17, and the driving force of the handrail 31 is the handrail ( The handrail 31 must smoothly run more than the total running resistance generated during the driving of the handrail 31 such as curvature resistance at the curved portion of 31 or frictional resistance at the inclined portion.

Further, in order to increase the driving force of the handrail 31, the friction coefficient between the inner end 31a of the driving pulley 17 and the handrail 31 is increased, or the driving belt 19a and the handrail 31 ), While the friction coefficient between the outer skins 31b should be increased, the handrail guide 32 and the handrails installed on the curved or inclined portions of the handrail 31 so that the handrail 31 maintains a constant trajectory. The friction coefficient between the inner skins 31a of (31) should be reduced.

8 to 11, the device according to the invention is indicated by the symbol " 10 ". The device 10 has a central molded part 12 which is a main molded part, and molded ends 14 and 16 for first and second protection.

The central forming part 12 includes an upper member 12a and a lower member 12b, and the forming ends 14 and 16 also have upper and lower members 14a, 16a and upper and lower members. (14b) and (16b) are included respectively. The long mandrel 18 is fixed to the upper member 12a. Each of these members will be described later.

The upper member 12a has a generally rectangular shape when viewed in plan view, and includes a main base portion 22. On the upper member 12a, a protruding central member 24 extends along the length of the upper member 12a. On the outer surface of the central member 24, a vertical wall portion 26, an inclined wall portion 28, and a slope A planar coupling surface 30 leading to the wall portion 28 is formed.

The engaging surface 30 is formed with an elongated groove 32 having the same shape as the outer surface of the handrail. On the bottom surface of the groove 32, a rectangular slot 34 having a small depth is formed. Further, on the bottom surface of the slot 34, a rectangular recess 36 having a small depth opened toward the bolt hole 38 is formed. The recess 36 serves as a lifting slot for lifting the mold.

Further, on both sides of the groove 32, small grooves 40 of a generally semi-circular shape are respectively formed close to the grooves 32 so as to accommodate excessive molding material during molding.

The mandrel 18 is secured by bolts (not shown) in the slot 34 as shown in FIG. 9. The mandrel 18 will remain bolted to the upper member 12a when in use, although shown in FIG. 8 in a separate state to illustrate its structure. As all members are formed of aluminum or other metal, a good conductive path between the mandrel and the upper member 12a can be provided. However, in this configuration, it may be necessary to continuously operate the mandrel heating elements for required cooling as described below. Alternatively, the mandrel may be insulated from the upper member 12a using an insulating spacer or similar member. As described above, the recess 36 can be used to separate the mold if necessary, that is, to separate the mandrel 18 from the upper member 12a.

The upper member 12a includes an elongated hole 44 into which the electric heating element 46 is inserted.

The upper member 12a also includes a cooling conduit 48 (FIG. 10), two conduits 48a extending in the longitudinal direction, and transversely extending inlets 50, respectively. And two conduits 48b connected to the outlet 52.

The lower member 12b of the forming portion 12 is configured to supplement the upper member 12a (FIG. 8). That is, the lower member 12b has an engaging surface 60 configured to contact the engaging surface 30. An inclined wall 62 extends from the engaging surface 60, and vertical walls 64 are connected to the inclined wall 62. The vertical walls 64 are slidably engaged with the vertical wall portion 26 so that the upper members 12a and the lower members 12b can be positioned laterally.

The lower member 12b is formed with a round groove 66 corresponding to the groove 32 to form a complete mold cavity corresponding to the required handrail portion.

In relation to the upper member 12a, the lower member 12b includes a hole 70 for the heating element 72. The lower member 12b also includes a conduit network (not shown) including longitudinal conduits and transverse conduits having a configuration consistent with those of conduits 48a and 48b. The transverse conduits are connected to the inlet 80 and outlet 82 to provide a cooling flow through the upper member 12a, as described below.

The molded ends 14 and 16 generally have the same configuration as each other, and therefore, for simplicity, only the molded end 16 shown in Fig. 8 will be described. As will be described later, the molded ends 14 and 16 are configured so that they can always be kept in a cool state even when the central molded part 12 is being heated. For this reason, the molded ends 14 and 16 are thermally insulated from the central molded part 12.

The side shapes of the upper and lower members 16a, 16b of the molded end 16 are substantially the same as the side shapes of the central molded portion 12. That is, the upper member 16a includes a main base portion 84 and a protruding central portion 85. The upper member 16a also has vertical wall portions 86, inclined wall portions 88, and a planar engagement surface 990 connected to the inclined wall portions 88. The engaging surface 90 does not have a groove for the central molded part and excessively formed molding material. The upper member 16a also includes a groove portion 92 that is continuous to the groove 32. The upper member 16a also includes a rectangular slot 94 that is continuous to the slot 34 of the central forming section.

Corresponding to the upper member 16a, the lower member 16b also has an engaging surface 100 having an inclined wall portion 102 and a vertical wall portion 104. In the middle portion of the engaging surface 100, a round groove 106 continuous to the groove 66 is formed to complete the handrail fragment.

Through holes are formed in the upper and lower members 16a and 16b of the molded end for cooling water, respectively, and only one of these through holes is shown in FIG. 10. In addition, the upper and lower members 16a and 16b are provided with inlets 109 and outlets 110. Above, the lower members 16a and 16b include holes for passage of the heating element.

The mandrel 18 includes a hole 19 for the electric heating element 20.

Hereinafter, the formation of the joint of the handrail will be described with reference to FIGS. 2 to 7. The end of the handrail can be prepared using a band saw, knife, hot cutting knife, or other suitable or conventional cutting means. Here, the main handrail body is denoted by "120". The handrail body 120 includes an upper portion 122 and a side leg portion 124. Inside the upper portion 122, reinforcing wires 126 as long non-stretching members are positioned in a planar arrangement. The handrail body 120 generally forms a T-shaped slot 128, which is covered with a slider fabric 130. The two ends of the handrail are denoted by reference numerals 131 and 132. The handrail is formed of a thermoplastic polyurethane elastomer (TPU), but it is also possible to manufacture it using other suitable thermoplastics.

First, the two handrail ends 131 and 132 are cut to have rectangular cut surfaces. First, the complementary portions of the side legs (not shown) are removed from the two hand rail ends by forming an inclined cut surface 134 extending through the side legs (not shown) at the two hand rail ends and corresponding to each other. . At this time, in the case of the second handrail end 132, it is necessary to form a horizontal complementary cutting surface just below the upper portion.

A horizontal cut surface 142 is formed at the end of each handrail to remove a portion of the upper portion 122 as indicated by reference numeral "140". This removal can be accomplished using a band saw.

The cut surface 142 is formed just above the arrangement of the wires 126. The cutting surface 142 removes the upper layer from the two handrail ends 131 and 132 together with the two transverse vertical end cutting surfaces. As a result, only the thin lower portion 148 of the upper handrail 122 remains as an intermediate layer comprising wires 126 at the handrail ends 131 and 132. These lower parts are then cut to form the desired weave pattern as shown in Figures 6 and 7.

Then you will recognize that the key factors that determine the strength of the weaving pattern are the strength of the wires and the relative cutting strength between the wires and the handrail. Together, these two factors determine how long the length of the wire embedded in the polymer increases when the load on the wire increases, rather than the breakdown of the wire's bond to the polymer. The ideal weaving pattern is such that the wire joints can overlap the wires sufficiently so that they are spaced above the critical length.

Referring to FIG. 6, it can be seen that there are four planes 150, 151, 152, and 153 where the wire is broken. In the plane 150, there are breaks in the two outer wires 126a and in the two intermediate wires 126e, in the plane 151 there are breaks in the three intermediate wires 126b, and in the plane 152 ), There are cutouts at the four outer wires 126c arranged in pairs adjacent to the outermost wires 126a, and in the plane 153 arranged upwards at both sides of the three intermediate wires 126b. There are breaks in the four inner wires 126d. Although the selected weave arrangement is shown, it will be appreciated that other suitable arrangements are possible. For example, the edge portion 155 including the outer wire 126a corresponding to the plane 150 is retained at the second handrail end 132, but may be removed at the first handrail end 131.

The cutting of the weave pattern is not with respect to the wire itself, but with respect to the wires embedded in the polymer. As will be described later, the polymer is intended to be remelted during the final joint process. Rather, each wire or series of wires are cut to engage the corresponding portion of the handrail body. This is illustrated in Figures 6 and 7. Therefore, when the two handrail ends are assembled with each other in the plane of the wires, there are essentially no gaps other than the tolerances caused by cutting, and thus, if the above tolerances and the like are ignored, any part of the handrail body around the wire There is no need to replace it. Another advantage of this technique is that the adhesive present between the wires and the thermoplastic material is not damaged or removed during the formation of the weave pattern.

Although FIGS. 4A and 4B show an inclined joint for a handrail portion that includes a slider fabric, it will be appreciated that many other types of joint mechanisms may be provided for the side legs 124 of the handrail. Will be able to. Other configurations are shown in Figures 13 and 14.

13 shows a configuration that provides a plurality of generally rectangular fingers that are woven or intertwined with each other on each end. In relation to the top of the handrail, these fingers are formed for a number of vertical planes. On both sides of the central plane 170, planes 171, 172 and planes 173, 174 are formed. Although vertical planes are shown, this configuration is not essential. As an example, it is possible to use various inclined planes, it is not necessary to construct all planes parallel to each other, and the planes may be inclined when viewed from the side or when viewed from the plane. In this way, there are upper and lower fingers 175, 176 extending from the two ends, and two intermediate fingers 177, 178. In addition, the ends of the fingers are positioned in different planes to provide the desired stress pattern and to transfer longitudinal tensile loads in the form of shear stresses between adjacent fingers.

14 shows another embodiment using triangular fingers. A complete joint is formed in relation to the central plane 172 and the planes 171 to 174 on both sides thereof. The upper and lower triangular fingers or protrusions 180, 181 extend to the planes 172, 173 closest to the central plane 170, and the other two triangular fingers 182, 183 are the most. It extends to the outer planes 171, 174. As described above, the cutting surfaces required for the joints can also be formed by sawing, cutting using a hot or cold cutting knife, or other suitable method. Saddles or patches may be provided to the slider fabric 130 to reinforce the joints, which are marked with reference numeral "164" in FIG. The saddle 164 may have a width sufficient to cover the joint over the entire width of the handrail. The length of the saddle 164 must be determined to provide the required reinforcement. The saddle 164 may be a sheet formed by cutting the slider fabric 130, and may be prepared by coating TPU or other suitable adhesive manually or in other ways.

After that, the handrail ends 131 and 132 are assembled in the molding apparatus 10. After that, the joint part is completed. When the material is removed by the formation of the cut surface, for example, a replacement sheet 158 is provided for the material removed by the cut surface 136. In addition, an alternate upper cap 160 is provided for portions 140 removed at each end portion. The replacement cap 160 is cut using a band saw or a knife or a hot cutting knife. When cutting using a band saw, the thickness of the band saw, ie, the removal of material from the handrail ends 131 and 132, is caused. Tolerances should be given for the sawing marks, but there is no need for such tolerances when using a knife. For more complex handrail structures, it may have more than one inner fabric layer. The handrail ends are prepared in the same way by separating each fabric layer added thereafter from the handrail by horizontal cutouts formed above and below it. The joints are spaced longitudinally from each other along the handrail so that they are not aligned with each other. Generally, these additional fabric layers are provided for the purpose of improving the lip strength of the handrail without increasing the longitudinal strength of the handrail since the strength of the longitudinal joints to the fabric layers is not critical. However, for some applications it may be desirable to provide some form of engagement fingers for additional fabric layers, as in the case of joints as described above.

Any standard pressurized tool can be used, and FIGS. 11 and 12 show a pressurized tool 56 with a pivotable top between open and closed positions. As described below, the closed mold needs to maintain sufficient pressure while allowing excess material to leak. As will be described later, the mold is slightly oversized, because the TPU is not initially pressurized.

Subsequently, cooling water is passed between the upper and lower members of the first and second forming ends 4 and 16. The reason for doing so is to keep the handrail portions in the molded ends 14 and 16 in a cooled state, thereby preventing the handrail from being remelted. At the same time, power is supplied to the heating elements to heat the central molding part 12. Accordingly, the polymer is re-melted in the central molding part 12, and as a result, a joint is formed to form a unified joint.

TPU is known to have strong hygroscopicity. Therefore, the final handrail formed of TPU absorbs moisture from the atmosphere during normal use. Therefore, care must be taken to prevent generation of water vapor or vapor bubbles when remelting the handrail to form a joint joint, and accordingly, selection of an appropriate pressure is required.

To this end, the dimensions of the mold are determined so that the handrail ends can be significantly expanded by thermal expansion to contact the interior of the mold and pressurize the TPU. In particular, since only the vapor bubbles can be discharged from the melted thermoplastic, sufficient pressure is generated to prevent the generation of vapor bubbles during the entire period during which the handrail ends are melted, that is, pressurized before the handrail ends are melted. The dimensions of the mold are determined so as to be possible. In this case, the pressure will be determined by the applied load and the dimensions of the mold. No pressure is applied to the mold in these parts because the parts adjacent to the handrail parts remain cooled and do not melt. Due to the pressure generated in this way, the gap of the mold is selected so as to prevent the generation of vapor bubbles at the forming temperature of the joint.

Then, if excess material is present, the excess material will slightly open the mold. That is, the upper and lower members 12a and 12b of the central molding part will be slightly easily spaced apart in the vertical direction, and thus excess material will flow out into the groove 40 '. When high pressure is used, it has been found that the handrail ends are slightly pushed out of the mold by excess material, which will also result in pressure reduction. It can be recognized that there is a pressure drop P between the main handrail part and the groove 40. This pressure drop P indicates the flow of material, the width of the channel formed between the two parts of the driving, and the main cavity in the mold. Has a functional relationship with the length L (see FIG. 9) between the and grooves 40. In general, the pressure drop P will be the difference between the pressure in the main cavity of the mold and the atmospheric pressure.

However, if the mold is slightly opened and the material flows into the groove 40, the mold area where the pressure of the molten TPU acts when viewed in plan will increase. Thus, the molten TPU will act not only in the cavity, but also on the surface forming channels extending into the groove 40. Since the load is constant, the average pressure in the mold inevitably decreases slightly, but despite this pressure is still sufficient to prevent moisture from being converted into vapor or vapor bubbles.

When sufficient excess TPU flows out to the grooves 40, the two mold parts are closed again to block the flow. In addition, the pressure in the cavity will be determined such that the value obtained by multiplying the pressure by the length of the mold (acted by the molten material) and the width of the mold will be equal to the applied load.

The mold is heated to a sufficient temperature and held in this state for a sufficient time to provide a good joint. At the end of this process, the power supply to all the heating elements except the heating elements 20 for the mandrel 18 is stopped, and in this state, the upper and lower members 12a and 12b of the central mold are cooled. Flow to resolidify the material around the joint. When the joint joint is completely cooled, the supply of coolant is stopped and the mold is opened. If necessary, the mandrel 18 can be separated from the upper member 12a using a lifting groove 36.

The TPU shrinks as it cools, and as a result the pressure decreases to atmospheric pressure. Overall, the pressure is sufficient to prevent the formation of vapor bubbles. When the joint is sufficiently cooled, the flow of all cooling water is stopped, and in this state, the power supply to the still operating heating elements is stopped, after which the mold is opened. If excess material is present, the excess material can be trimmed with a knife, and the edges of the handrail can be quickly and simply trimmed, so that the handrail has a smooth and uniform appearance, and the joints Ordinary users will not be able to see. A strong joint with properties corresponding to the main body of the handrail is provided as the wires are reversed.

In addition, during the formation of the joint, the temperature remains high enough to ensure good integration of the various thermoplastic layers, so that the thermoplastic layers are fully merged with each other through the joint.

Suitable handrail materials include polyurethane thermoplastic elastomers, which have good gloss finishes that adhere well to wires, are durable and abrasion resistant, exhibit good tear resistance and good adhesion to slider fabrics. Gives However, the thermoplastic polyurethane has a property of significantly expanding when heated. For this reason, the mold is manufactured in a state of being oversized by a predetermined degree. This oversizing was performed over the entire length of the mold, and as a result of the experiment, satisfactory results were obtained when doing so. Preferably, a lower limit is given for oversizing. When the uniform size is provided over the entire length of the mold to uniformize the finish of the joint, the joint cannot be visually identified. When measured accurately along the length of the joint, it is true that there is a dimension change of several thousandths of a degree, but such a dimension change occurs only over a distance of several inches, and as a result, it cannot be confirmed by the ordinary user's eyes. . The greater the thermal expansion of the joint, the greater the shrinkage of the joint during cooling. As a result, the joint area is slightly smaller than the main handrail portion, but is joined to the main handrail body by smoothly tapered portions that are not easily visible to the ordinary user.

When forming a weave pattern for a joint, it is important to cut the other parts of the pattern fairly accurately to equal the amount of material present and the amount of material required to refinish the joint. If too much material is present such that a significant amount flows through the edge of the mold, the wire ends are displaced laterally by the lateral flow. As a result, as the wire ends are displaced and the joints are distorted, the mechanical properties of the joint are adversely affected. The ideal case is to minimize the flow of excess material, in which case the wire ends remain almost unmoved, and the wire ends are also aligned with each other and in the required arrangement to provide a strong joint. do.

In order to avoid forming a completely square cut surface in the slider fabric 130, an inclined cut surface 134 or another type of cut surface is provided in the slider fabric. By providing an inclined cut surface, the joint can move more smoothly and the risk of damage during use is alleviated. In addition, the tension load in the slider fabric 130 can thus be effectively transferred across the joint. If a square joint or butt joint is provided to the fabric 130, for example, if the handrail is bent back in a predetermined drive assembly, the joint will be opened by the tensile load. The joints will be reinforced by the saddle for the fabric and the tensile load will be transferred.

So far, the present invention has been described in relation to a handrail, but the present invention is of course applicable to any article formed of a thermoplastic material and having a constant cross-sectional shape. In one example, the present invention is often applicable to handrails and conveyor belts having similar properties in many respects. Typically, conveyor belts include reinforcing wires or other elongation restraints that provide the required strength and elasticity. Conveyor belts often have a layer of fabric attached to one side. Typically, the conveyor belt has a simple rectangular cross-section, so forming a weave pattern through the entire depth of the conveyor belt and assembling it in a suitable mold can be accomplished simply.

12 is a flow chart for explaining the process of joining the handrail without disassembling the escalator by one disclosure.

According to one disclosure, in S300, a first handrail extraction process for cutting a portion of the first handrail mounted on the escalator device in a stopped state and taking out the end of the cut first handrail to the outside can be provided. have.

According to one disclosure, in S301, the side surface of the cover of the first handrail formed of a thermoplastic material is cut to a point of 275mm from the end of the first handrail to a depth of 10-20mm, and the cover of the cut first handrail is rolled up. A first handrail cover separation process can be provided.

In S302 by one disclosure, in order to divide the wire set made of 20 subwires installed under the cover of the first handrail, the side face of the wire set is cut to a point 270 mm from the end at a depth of 1 mm, and the cut wire set It can provide a wire set separation process to roll over the cover.

By one disclosure, in S303, the separated wireset is returned to the original position, the first subwireset of a pair of 20 subwires included in the wireset is cut to a point of 250 mm from the end of the wireset, and a pair of Cut a pair of second subwiresets located next to the first subwireset to a point 188mm from the end of the wireset, and wire a pair of third subwiresets located next to the pair of second subwiresets The wire set is cut to a point of 125 mm from the end of the set, and the remaining subwire set is cut to a point of 125 mm from the end of the wire set to cut the wire set into a tower shape, and the wire set cut into a tower shape is rolled onto the cover. A separation process can be provided.

In accordance with one disclosure, in S304, a slider separation process is performed by cutting along a point at a predetermined distance from both edges of a slider located at the bottom of a separated wire to separate the slider from the rubber guard, and cutting and removing the slider to a point of 125 mm from the end of the slider. Can provide

According to one disclosure, in S305, the cover of the second handrail formed of a thermoplastic material is separated, the wire set is separated, the sub-wire is separated into a reverse tower shape, and the slider is separated to abut the first handrail. 2 Can provide a handrail bonding process.

In accordance with one disclosure, in S306, heat is applied to a portion where the second handrail and the first handrail contact each other using a central molding unit, so that the thermoplastic materials forming the first and second handrails are melted to form a mashroom joint. In addition, when the Mushroom joint is formed 2-3 mm, a welding process for stopping the operation of the central molding unit may be provided.

According to one disclosure, in S307, a cooling process for cooling the combined first handrail and the second handrail through a welding process may be provided.

In accordance with one disclosure, in S308, the top-shaped wire set of the first hand rail is positioned over the first handle rail and the second hand rail, and the reverse tower-shaped wire set of the second hand rail is disposed between the second hand rail and the second hand rail. It is possible to provide a wire bonding process in which the wire set of the first hand rail and the wire set of the second hand rail are brought into contact with each other by being positioned over one hand rail.

In accordance with one disclosure, in S309, the wire set of the first handrail and the second hand of the first handrail to which heat was applied, while simultaneously applying heat of 300 ° C. to the lower end of the wire set of the combined first handrail and the second handrail. It is possible to provide a wire welding process that rolls the wire set of the rail with a roller to be coupled to the slider.

In accordance with one disclosure, in S310, the cover of the first handrail and the cover of the second handrail are covered on the combined wire set of the first handrail and the wire set of the second handrail, and then the cover of the first handrail and Cover welding forming a cover joint by fusing and bonding the cover of the first handrail and the cover of the second handrail by applying a temperature above the melting point according to the material of the cover of the second handrail, and then cooling at a temperature below the melting point The process can be provided.

According to one disclosure, in S311, the Mushroom joint is removed by removing the Mushroom joint formed at the lower ends of the first and second handrails having the cover joint, and applying heat of 300 to 350 ° C. for 1 minute to the portion where the Mushroom joint is removed. It is possible to provide a mashroom joint removal process in which the removed portion is melted and recombined.

According to one disclosure, in S312, a molding process for molding the combined first and second handrails can be provided.

According to one disclosure, the molding process (S312) may be molded by pressing the combined first and second handrails at 200 bar at a temperature condition of 210 to 320 in a closed state.

According to one disclosure, in S313, a combined first handrail and second handrail are inserted into the escalator machine, and a process of extracting the other end of the cut first handrail to the outside by applying a predetermined force can be provided. have.

According to one disclosure, in S314, a predetermined length according to a user's input among the first handrails extracted externally may be cut to provide a process of removing the old portion of the first handrail. And

In accordance with one disclosure, in S315, an endless rail forming process may be provided for coupling the other ends of the first handrail and the second handrail from which the old parts are removed. In one end, the endless rail forming process (S315) foams a thermoplastic adhesive in a portion where the other ends of the first handrail and the second handrail abut, and forms a joint under a temperature of 75 to 150 ° C and a pressure of 2Mpa. And, when the temperature of the portion where the seam is formed falls below 60 ° C, the connection cloth having a flash point of 60 ° C or higher is padded, and then cooled to cool the joint and the connection cloth.

According to one disclosure, the thermoplastic adhesive may include 120 parts by weight of an epoxy curing agent, 110 to 130 parts by weight of a thermoplastic resin, and 20 to 30 parts by weight of an inorganic filler based on 100 parts by weight of a polyurethane urea resin having an acid value of 35 to 45 mg KOH / g. .

At this time, the thickness of the seam is preferably 1mm or more and 1.5mm or less.

According to one disclosure, the first handrail and the second handrail are made of a thermoplastic carbon polymer composition that can be reprocessed at room temperature.

In addition, the thermoplastic carbon composition is (A) a thermoplastic organic polymer comprising 20 to 40% by weight of styrene-based non-crosslinked elastomer, 10 to 30% of acrylic styrene copolymer and 50 to 90% by weight of thermoplastic polyurethane, (B) (B1) (B1a) silicone containing 55 to 61% by weight of silica based on diorganopolysiloxane gum having an average of two or more alkenyl groups per molecule and (B1b) diorganopolysiloxane gum (B1a) Base, and (B2) a blend of a silicone composition comprising an organohydrido silicone compound containing an average of at least two silicon-bonded hydrogen groups per molecule, and comprising a thermoplastic organic polymer (A) versus a silicone composition (B). The weight ratio may be characterized by being 62:38.

In addition, after the mash room joint removal process, it is possible to provide a saddle attaching process that increases the bonding force between the first handrail and the second handrail by attaching the saddle member from the center of the lower ends of the first handrail and the second handrail toward the edge. have

In addition, after the molding process, after maintaining the temperature of 120 to 150 ° C for 10 to 15 minutes on the combined first and second handrails, and then maintaining the temperature of 20 to 24 ° C for 5 to 6 minutes, 17 It is possible to provide a handrail coupling test process to check whether the first and second handrails are melted by maintaining a temperature of 170 to 190 ° C for ~ 25 minutes. If the handle rail is melted, it is judged as defective and molding is to be performed again.

By one disclosure, silica is present at 22 to 28% by weight based on the diorganopolysiloxane gum (B1a), and the weight ratio of the thermoplastic urethane polymer (A) to the silicone composition (B) is 78:22. have.

13 is a view showing that a separated sub-wire according to one disclosure is cut into a tower shape.

According to one disclosure, the first handrail may have a subwire cut into a tower shape. This is to create a groove so that the wire of the first handrail and the wire of the second handrail can be more effectively combined.

A pair of first subwiresets 1300 of the 20 subwires included in the wireset is cut from the end 1305 of the wireset to a point of 250 mm, and a pair of first subwiresets 1300 is next to A pair of positioned second subwiresets 1301 are cut from the ends 1305 of the wireset to a point of 188 mm, and a pair of third subwiresets located next to the pair of second subwiresets 1301 The wire set can be cut in a tower shape by cutting 1302 to a point of 125 mm from the end 1305 of the wire set, and cutting the remaining subwire set 1303 from the end 1305 of the wire set to a point of 125 mm. have. At this time, only the remaining four subwire sets 1304 maintain the original length.

14 is a view showing a state in which a subwire of a first handrail and a subwire of a second handrail are combined according to one disclosure.

At this time, 20 subwires included in the second handrail are cut to a length corresponding to the subwires cut into the top shape of the first handrail, but the subwires of the first handrail and the subwires of the second handrail are It can be characterized in that the subwire of the second handrail is cut by 1 mm so as not to overlap.

That is, it is to prevent a situation in which the wireset of the first handrail and the wireset of the second handrail are not smoothly combined, and a partial overlap occurs, so that the correct combination is not made.

At this time, a gap of 1 mm between the wireset of the first handrail and the wireset of the second handrail can be completely joined in the process of applying heat to the wireset and rolling.

The above-described preferred embodiments of the present invention are disclosed for the purpose of illustration, and those skilled in the art will appreciate various modifications, changes and additions within the spirit and scope of the present invention. It should be regarded as belonging to the above claims.

In the exemplary system described above, the methods are described based on a flow chart as a series of processes or blocks, but the present invention is not limited to the order of the processes, and some processes may occur in a different order or simultaneously with other processes as described above. You can. Further, those skilled in the art will understand that the processes shown in the flowcharts are not exclusive, other processes may be included, or one or more processes in the flowcharts may be deleted without affecting the scope of the present invention.

Claims (7)

In the process of joining the handrail without disassembling the escalator,
A first handrail extraction process for cutting a portion of the first handrail mounted on the escalator device in a stopped state and taking the end of the cut first handrail outward;
A first handrail cover separation process of cutting a side surface of the cover of the first handrail to a point that is 275 mm from an end of the first handrail to a depth of 10 to 20 mm, and rolling up the cover of the cut first handrail;
To separate the wire set consisting of 20 subwires installed under the cover of the first handrail, the side surface of the wire set is cut to a point 270 mm from the end at a depth of 1 mm, and the cut wire set is placed on the cover. Rolling wire separation process;
Returning the separated wire set to its original position, cutting a pair of first sub-wire sets of 20 sub-wires included in the wire set to a point of 250 mm from the end of the wire set, and the pair of first subs The pair of second subwiresets located next to the wireset is cut to a point of 188 mm from the end of the wireset, and the pair of third subwiresets located next to the pair of second subwiresets is wired. Cut the set of wires from the end of the set to a point of 125 mm, and cut the remaining subwire sets from the end of the wire set to a point of 125 mm, cut the wire set into a tower shape, and roll the wire set cut into the top shape over the cover. Raising sub-wire separation process;
A slider separating step of cutting along a point at a predetermined length away from both edges of the slider located at the bottom of the separated wire to separate the slider from the rubber guard, and cutting and removing the slider to a point of 125 mm from the end of the slider;
A second handrail coupling process of separating the cover of the second handrail, separating the wire set, separating the sub-wire into a reverse tower shape, and separating the slider to make contact with the first handrail;
By applying heat to the portion where the second handrail and the first handrail abut using a central molding unit, the thermoplastic materials forming the first handrail and the second handrail are melted to form a mashroom joint, and the mashroom joint A welding process of stopping the operation of the central molding part when 2 to 3 mm is formed;
A cooling process for cooling the first handrail and the second handrail combined through the welding process;
The first handrail top-shaped wire set is placed over the first handle rail and the second hand rail, and the second hand rail reverse tower-shaped wire set is placed over the second hand rail and the first hand rail. A wire bonding process in which the wire set of the first handrail and the wire set of the second handrail come into contact with each other by positioning them;
While applying heat of 300 ° C. to the lower ends of the wire set of the combined first handrail and the wire set of the second handrail, rollers of the wire set of the first handrail and the wire set of the second handrail with heat are applied. Wire welding process to be rolled to be coupled to the slider;
Cover the cover of the first handrail and the cover of the second handrail on the wire set of the combined first handrail and the wire set of the second handrail, and then cover the cover of the first handrail and the second handrail. A cover welding process of forming a cover joint by fusing and bonding the cover of the first handrail and the cover of the second handrail by adding a temperature above the melting point according to the material of the cover, followed by cooling at a temperature below the melting point;
Remove the mashroom joint formed at the lower end of the first handrail and the second handrail on which the cover joint is formed, and apply heat of 300 to 350 ° C to the portion where the mashroom joint is removed for 1 minute to remove the portion where the mashroom joint is removed. Mushroom joint removal process to melt and recombine;
A molding process for molding the combined first and second handrails;
A step of inserting the combined first and second handrails into the escalator machine and extracting the other ends of the cut first handrails by applying a predetermined force to the outside;
A step of cutting a predetermined length according to a user's input among the first handrails extracted to the outside to remove an old portion of the first handrail; And
The endless rail forming process of joining the other end of the first handrail and the second handrail from which the old part is removed; including, the process of joining the handrail without disassembling the escalator. According to claim 1,
The endless rail forming process,
A thermoplastic adhesive is foamed on a portion where the other ends of the first and second handrails abut, and a seam is formed under a temperature of 75 to 150 ° C and a pressure of 2 Mpa,
When the temperature of the portion where the seam is formed falls below 60 ° C., after attaching a connecting cloth having a ignition point of 60 ° C. or higher, cooling it, so that the seam and the connecting cloth are joined, thereby joining the handrail without disassembling the escalator. fair. According to claim 2,
The thermoplastic adhesive,
Based on 100 parts by weight of polyurethane urea resin having an acid value of 35 to 45 mg KOH / g, 120 parts by weight of epoxy curing agent, 110 to 130 parts by weight of thermoplastic resin, and 20 to 30 parts by weight of inorganic filler,
The seam has a thickness of 1mm or more and 1.5mm or less, the process of joining the handrail without disassembling the escalator. According to claim 1,
The molding process,
A process of joining the handrails without disassembling the escalator, by molding the combined first and second handrails at 200 bar at a temperature condition of 210 to 320 ° C in a closed state. According to claim 1,
After the mash room joint removal process, the saddle attaching step of increasing the bonding force of the first handrail and the second handrail by attaching the saddle member from the center of the lower end of the first handrail and the second handrail toward the edge. The process of joining the handrail without disassembling the escalator. According to claim 1,
After the molding process, after maintaining the temperature of 120 to 150 ° C for 10 to 15 minutes on the combined first and second handrails, and then maintaining the temperature of 20 to 24 ° C for 5 to 6 minutes, then 17 Handrail bonding test process to check whether the first and second handrails are melted by maintaining a temperature of 170 to 190 ° C for ~ 25 minutes; further comprising, bonding the handrails without disassembling the escalator Fair to do. According to claim 1,
The second handrail coupling process,
Cut the 20 subwires included in the second handrail to a length corresponding to the subwires cut into the top shape of the first handrail, but the subwires of the first handrail and the subwires of the second handrail A process of joining the handrails without disassembling the escalator, characterized in that the subwires of the second handrail are cut 1mm further so as not to overlap.

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