KR20190089301A - Process for joining handrail without disassembling escalator - Google Patents

Abstract

Disclosed is a process for joining separated handrails and, more specifically, to a process capable of joining exactly two handrails without disassembling all the handrails consisting of a thermoplastic carbon polymer composition.

Description

The present invention relates to a process for joining a handrail without disassembling an escalator,

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

An escalator is a kind of conveyor, which is a device for continuously raising and lowering a person by driving a step that is rotated by a power, which is also called an automatic step. Escalators are routinely installed on buildings of a certain size and above, and provide convenience for people to move. Such an escalator is provided with a handle structure such as a handrail so that the occupant can safely move on his / her body.

Generally, when a handrail installed on an escalator is entirely replaced or partially replaced, the power portion of the escalator has to be disassembled to replace the new handrail. However, the process of unnecessarily disassembling the power section of the escalator in the process of replacing the handrail took a lot of time, which resulted in inconvenience to the user.

Therefore, when replacing only the handrail in the field, there is a growing need for a method of replacing the handrail without releasing the entire portion driving the escalator.

Korean Utility Model Publication No. 20-2000-0006185

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a process for joining only hand rails without disassembling the entire machine of the escalator in a field process for joining existing hand rails and new hand rails.

The present invention provides a process for joining a handrail without disassembling the escalator by the start of the work. The process cuts a part of the first handrail mounted on the escalator apparatus in a state in which the operation is stopped, A first handrail extracting step of taking out the end portion of the first handrail to the outside can be provided.

In this step, the side of the cover of the first handrail is cut to a depth of 10 to 20 mm from the end of the first handrail to a point of 275 mm, and a first handrail cover separating step Can be provided.

In addition, in this process, the side of the wire set is cut to 1 mm depth from the end to 270 mm to divide the wire set consisting of 20 sub-wires installed under the cover of the first hand rail, It is possible to provide a scraped wire set separation process.

The process also returns the separated wire set to its original position and cuts a pair of the first sub-wires of the 20 sub-wires included in the wire set to a point 250 mm from the end of the wire set, A pair of second sub-wires located next to the wire set is cut to a point of 188 mm from the end of the wire set, and a pair of third sub-wires set next to the pair of second sub- And the remaining sub wire set is cut to the point of 125 mm from the end of the wire set to cut the wire set into the top shape and the sub wire separation process of pulling up the wire set cut in the top shape onto the cover .

The present invention also provides a slider separating process in which the slider is cut along a predetermined distance from both edges of the slider located at the lower end of the separated wire to separate the slider from the rubber protector and cut to a point 125 mm from the end of the slider .

This step also provides a second handrail joining process in which the cover of the second handrail is separated, the wire set is separated, the subwires are separated into a back-top shape, and the slider is separated and brought into contact with the first handrail can do.

Also, in this step, the portion where the second handrail and the first handrail abut each other is heated by using the central forming portion so that the thermoplastic material constituting the first handrail and the second handrail melts to form a mushroom joint, It is possible to provide a welding process in which the operation of the central forming part is stopped when the joint is formed to a thickness of 2 to 3 mm.

The present process can also provide a cooling process for cooling the first handrail and the second handrail combined through the welding process.

In this step, the wire set of the tower shape of the first handrail is placed over the first handle rail and the second handrail, and the wire set in the shape of the inverted tower of the second handrail is placed on the second handrail and the first handrail So that the wire set of the first handrail and the set of wires of the second handrail are brought into contact with each other.

Further, in this step, heat of 300 占 폚 is applied to the lower end of the wire set of the first handrail and the wire set of the second handrail, and the wire set of the first handrail and the wire A wire welding process may be provided in which the set is rolled by a roller to be coupled to the slider.

This process also covers the cover of the first handrail and the cover of the second handrail on the set of wires of the combined first handrail and the set of wires of the second handrail and then covers the cover of the first handrail and the second hand A cover welding process is performed in which the cover of the first handrail and the cover of the second handrail are fused and bonded by applying a temperature equal to or higher than the melting point according to the material of the cover of the rail and then cooled at a temperature below the melting point to form a cover joint can do.

Also, in this step, the first handrail formed with the cover joint and the mushroom joint formed at the lower end of the second handrail are removed, and the mushroom joint is removed by applying heat at 300 to 350 DEG C for 1 minute to the portion where the mushroom joint is removed The mushroom joint removing process in which the portions are melted and recombined can be provided.

The process may also provide a molding process for molding the combined first and second hand rails.

It is possible to provide a process of inserting the first handrail and the second handrail coupled by the start of operation into the escalator continuously and extracting the other end of the cut first handrail to the outside by applying a predetermined force.

A process of removing the aged portion of the first handrail by cutting a predetermined length of the first handrail extracted from the outside by the start of operation by a user's input. It is possible to provide an endless rail forming process for joining the first end of the first handrail and the other end of the second handrail, wherein the aged portion is removed by the start of operation.

Fig. 1 is a view for explaining an escalator installed according to the present invention.
Fig. 2 is a view for explaining the driving of the escalator according to one embodiment.
3 is a perspective view of a band saw for cutting a handrail.
4 is a view showing a continuous cutting process for one end of the handrail.
Fig. 5 is a view showing a handrail end before cutting the woven pattern at the end of the handrail. Fig.
Fig. 6 is a perspective view of the two ends of the handrail, showing the cutting form of the woven pattern. Fig.
7 is a perspective view showing the assembly of two molded ends and mandrel forming portion of the device of the present invention.
Figure 8 is a perspective view of the apparatus of the present invention in an open state.
9 is a side view of the apparatus of the present invention.
10 is a plan view of an inventive apparatus illustrating cooling paths.
11 is a perspective view of the apparatus of the present invention provided inside the press.
Fig. 12 is a flowchart for explaining a step of joining hand rails without disassembling the escalator according to the first embodiment. Fig.
FIG. 13 is a view showing that the separated subwires according to one embodiment are cut into a top shape. FIG.
14 is a view showing a state in which a sub wire of the first hand rail and a sub wire of the second hand rail are engaged with each other according to the first embodiment.

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 can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Also, in order to clearly illustrate the present invention in the drawings, portions not related to the present invention are omitted, and the same or similar reference numerals denote the same or similar components.

The objects and effects of the present invention can be understood or clarified naturally 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 from the following detailed description. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a view for explaining an escalator installed according to the present invention.

As shown in Fig. 1, a conventional escalator includes a step 100 for circulating a passenger with a predetermined orbit, a handrail 300 installed on both sides of the step 100 and serving as a handle, And a driving device 500 for driving the handrail 300 and the handrail 300.

When the driving device 500 is operated, the escalator thus configured circulates the step 100 and the handrail 300 at a constant speed along a predetermined orbit and carries the passenger. Therefore, the passengers aboard the escalator can safely move to the destination if only the handrail 300 is held.

2, the escalator includes a driving unit 10 for generating a driving force required to transfer a passenger or the like to a destination floor, a step unit 20 for circulating a predetermined orbit by the driving unit 10 so that a passenger or the like And a hand rail part 30 which circulates in a predetermined orbit by the driving part 10 together with the step part 20 so as to serve as a handle of the passenger who climbed the step part 20. [

The driving unit 10 includes a driving motor 11 as a driving source, a speed reducer 12 for adjusting the rotational speed of the driving motor 11, and a driving shaft 14a disposed parallel to the axis of the speed reducer 12 A plurality of drive terminal gears 14A which are mounted at both ends and are integrated with sprockets (not shown) so as to receive the drive force generated from the speed reducer 12 by the drive chain 13 , A driven terminal gear 14B provided on the lower step side of the step portion 20 so as to be respectively engaged with the step chain 15 and a hand rail chain 16 mounted on the other sprocket of the drive terminal gear 14A, A plurality of drive pulleys 17 for rotating the handrails 31 to rotate together with sprockets 17 connected to the drive pulleys 17 and a drive pulley 17 for driving the handrails 31, And a hand rail 31 is provided on the outer peripheral surface of the drive pulley 17 And a plurality of driving rollers 19 which are wound by a drive belt 19a which is tightly fitted and rotated by a drive pulley 17.

The handrail part 30 includes a handrail 31 fitted so as to be squeezed between the outer circumferential surface of the drive pulley 17 and the outer circumferential surface of the drive belt 19a, And a hand rail guide (32) for guiding and supporting the guide rail.

In the figure, reference numerals 31a and 31b denote the handrail inner skin and the handrail outer skin, respectively.

As shown in FIG. 2, the driving method of the handrail part includes a method of using a pulley and a belt, a method of using a narrow pressure of a roller (not shown), and a method of using the tension of the handrail so that the pulley is positioned at the terminal part of the handrail (Not shown). All of these driving methods of the hand rails utilize the frictional force between the inner surface of the handrail and the rollers or pulleys.

Since all three of the above-mentioned methods for reducing the running resistance of the handrail, which is the right range of the present invention, are the most important in the driving method of the handrail part, a method using a pulley and a belt will be described as a typical example.

That is, when the drive motor 11 and the speed reducer 12 of the drive unit 10 start operating, the drive terminal gear 14A connected to the speed reducer 12 rotates, and the drive terminal gear 14A, The step chain 13 moves each step (not shown) by the rotation of the drive pulley 17, and the drive pulley 17 for the handrail is rotated by the drive terminal gear 14A. The drive belt 19a wrapped around each drive roller 19 is pressed on the outer circumferential surface of the drive rail 17 with the handrail 31 interposed therebetween so that the handrail 31 is eventually circulated along a fixed trajectory.

The driving force of the handrail 31 is transmitted to the handrail 31 via the handrail 31 and the rollers 19 or pulleys 17, The handrail 31 must run smoothly over the entire running resistance generated during the running of the handrail 31, such as the curvature resistance at the curved portion of the curved portion 31 or the frictional resistance at the inclined portion.

In order to increase the driving force of the handrail 31, it is necessary to increase the coefficient of friction between the driving pulley 17 and the inner surface 31a of the handrail 31 or to increase the friction coefficient between the driving belt 19a and the handrail 31 The handrail 31 and the handrail 31 are provided on the curved portion or the inclined portion of the handrail 31 so as to maintain a constant locus of the handrail 31, The coefficient of friction between the inner film 31a of the inner tube 31 and the inner tube 31a of the inner tube 31 should be reduced.

8 to 11, the device according to the invention is shown with the reference numeral "10 ". The device 10 has a central forming part 12, which is the main forming part, and first and second protective forming ends 14 and 16.

The central forming part 12 includes an upper member 12a and a lower member 12b and the forming ends 14 and 16 are also formed on the upper and lower members 14a and 16a, (14b) and (16b), respectively. A long mandrel 18 is fixed to the upper member 12a. These members will be described later.

The upper member 12a has a substantially rectangular shape when viewed in plan and includes a main base portion 22. On the upper member 12a, a projecting central member 24 extends along the length of the upper member 12a. The vertical member 26, the inclined wall 28, A planar engagement surface 30 is formed which is continuous with the wall portion 28.

The engagement surface 30 is formed with a long groove 32 having the same shape as the outer surface shape of the handrail. A rectangular slot 34 having a small depth is formed on the bottom surface of the groove 32. A rectangular recessed portion 36 having a small depth and opening toward the bolt hole 38 is also formed on the bottom surface of the slot 34. [ The recess 36 serves as a lifting slot for lifting the mold.

In addition, on both sides of the groove 32, small semicircular grooves 40 are formed respectively near the grooves 32 so as to accommodate the excessive molding material during molding.

The mandrel 18 is secured in the slot 34 by bolts (not shown) as shown in FIG. The mandrel 18 is shown in a separate state in FIG. 8 so as to illustrate its structure, but it will remain bolted to the upper member 12a during use. As all the members are formed of aluminum or other metal, a good conductive path can be provided between the mandrel and the upper member 12a. However, in such a construction, it may be necessary to operate the mandrel heating elements continuously for the required cooling as described below. As another embodiment, the mandrel may be insulated from the upper member 12a using an insulating spatterer or the like. As noted above, recesses 36 may be used to separate the molds as needed, i.e., to separate mandrel 18 from upper member 12a.

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

The top member 12a also includes a cooling conduit 48 (FIG. 10), which includes two conduits 48a extending in the longitudinal direction and a plurality of conduits 48b extending in the transverse direction, And two conduits 48b connected to the outlet 52.

The lower member 12b of the molded part 12 is configured to complement the upper member 12a (Fig. 8). That is, the lower member 12b has a mating surface 60 configured to abut the mating surface 30. An inclined wall 62 extends from the engaging surface 60 and a vertical wall 64 is connected to the inclined wall 62. The vertical walls 64 are adapted to be slidably engaged with the vertical wall 26 so as to position the upper member 12a and the lower member 12b 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) that includes longitudinal conduits and transverse conduits having a configuration consistent with that of conduits 48a, 48b. The transverse conduits are connected to an inlet 80 and an outlet 82 to provide a cooling flow through the upper member 12a, as described below.

The forming ends 14, 16 generally have the same configuration as each other and will therefore be described only with respect to the forming end 16 shown in FIG. 8 to simplify the description. As will be described later, the forming end portions 14 and 16 are configured to be always kept in a cooled state even when the central forming portion 12 is being heated. For this reason, the forming ends 14, 16 are thermally insulated from the central forming portion 12.

The side shapes of the upper and lower members 16a, 16b of the forming end 16 are substantially the same as the side shape of the central forming portion 12. [ That is, the upper member 16a includes a main base portion 84 and a protruded central portion 85. [ The top member 16a also has vertical walls 86, sloped walls 88, and a planar mating surface 990 that extends to the sloped walls 88. [ The mating surface 90 does not have grooves for the central forming part and grooves for excess molding material. The upper member 16a also includes a groove portion 92 continuous to the groove 32. [ The upper member 16a also includes a rectangular slot 94 that is continuous with the slot 34 of the central forming portion.

Corresponding to the upper member 16a, the lower member 16b also has a coupling surface 100 having the inclined wall portion 102 and the vertical wall portion 104. [ In the intermediate portion of the engaging surface 100, a circular groove 106 continuous to the groove 66 is formed to complete the handrail piece.

The upper and lower members 16a and 16b of the forming end portion have through holes formed therein for cooling, respectively. In FIG. 10, however, only one of these through holes is shown. An inlet 109 and an outlet 110 are formed in the upper and lower members 16a and 16b. As described 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 joints of the handrail will be described with reference to Figs. 2 to 7. Fig. 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 indicated by the reference numeral "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 unstretched members are positioned in a planar arrangement. The handrail body 120 forms a generally T-shaped slot 128, which is covered with a slider fabric 130. The two ends of the handrail are labeled 131 and 132. The handrail is formed of a thermoplastic polyurethane elastomer (TPU), but it is also possible to manufacture using other suitable thermoplastic materials.

First, the two hand rail ends 131 and 132 are cut with rectangular cut surfaces. First, complementary portions of the side legs 124 are removed from the two handrail ends by extending through the side legs 124 at the ends of the two hand rails and forming a corresponding sloped cut surface 134. At this time, in the case of the second handrail end 132, it is necessary to form a horizontal complementary cutting surface 136 directly below the upper portion 122.

A horizontal cut surface 142 is formed at each handrail end to remove a portion of the top 122 as indicated by the reference numeral "140 ". This removal can be achieved using a band saw. In this case, a jig 144 including a mandrel 146 is used as shown in Fig. The mandrel 146 has a shape that coincides with the T-shaped slot 128 so as to secure the handrail end 131 or 132 on the jig 144 and is snugly inserted into the slot 128 thereof. In this state, other cut surfaces such as the horizontal cut surface 142 or the cut surface 134 can be accurately formed. For this purpose, a slot may be formed in the mandrel 146, or the handrail itself may be supported in other ways. It is also possible to form a woven pattern in the upper portion 140 instead of removing a portion of the upper portion 140.

The cut surface 142 is formed just above the array of wires 126. This cutting surface 142 removes the upper layer from the two handrail ends 131, 132 together with the two transverse vertical end cut surfaces. As a result, only the thinner lower portion 148 of the handrail top 122 remains as an intermediate layer comprising the wires 126 at the handrail ends 131, 132. These lower portions are subsequently cut to form the required woven pattern, as shown in Figures 6 and 7.

It will then be appreciated that the key factor in determining the strength of the woven pattern is the strength of the wires and the relative shear strength between the wires and the handrail. These two factors together determine how much of the wire embedded in the polymer increases the load applied to the wire to determine if the wire itself fractures instead of breaking the wire to the polymer. The ideal plaiting pattern has a form that allows the wire joints to overlap the wires sufficiently enough to be spaced above the critical length as described above.

Referring to FIG. 6, it can be seen that there are four planes 150, 151, 152, and 153 with broken wires. In the plane 150, there is a stitch in the two outer wires 126a and the two intermediate wires 126e, there is a stitch in the three intermediate wires 126b in the plane 151, There are cutouts in the four outer wires 126c arranged in pairs adjacent to the outermost wires 126a and in the plane 153 are arranged in a line on both sides of the three intermediate wires 126b There is a break in the four inner wires 126d. Although the selected interleaving arrangement is shown, it will be appreciated that other suitable arrangements are possible. In one example, edge portions 155, which include outer wire 126a corresponding to plane 150, may be retained at second handrail end 132 while removed at first handrail end 131. [

The cutting of the woven pattern consists not of the wire itself but of the wires embedded in the polymer. As described below, the polymer is intended to be remelted during the final joining process. Rather, each wire or series of wires is cut for engagement with a corresponding portion of the handrail body. This is shown in FIGS. 6 and 7. FIG. Hence, when the two handrail ends are assembled together in the plane of the wires, there is essentially no pores other than the tolerance resulting from the cutting, so that if any of the above tolerances 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 is not damaged or removed during the formation of the woven pattern.

Although it is noted in Figures 4A and 4B that the tapered joints for the handrail portion including the slider fabric are shown, it is appreciated that the side legs 124 of the handrail may also provide a number of different types of joint mechanisms It will be possible. Other configurations are shown in Figs. 13 and 14. Fig.

Fig. 13 shows a configuration that provides a plurality of generally rectangular fingers woven together or intertwined with each other on each end. With respect to the top of the handrail, these fingers are formed for a plurality of vertical planes. Planes 171 and 172 and planes 173 and 174 are formed on both sides of the center plane 170. [ Although vertical planes are shown, this configuration is not essential. For example, it is possible to use various inclined planes, not all planes need to be parallel to each other, and the planes may be inclined when viewed from the side or in a plan view. In this way, there are upper and lower fingers 175, 176 extending from the two ends and two intermediate fingers 177, 178. The ends of the fingers are also located in different planes so as to provide the required stress pattern and also to transmit a longitudinal tensile load in the form of shear stress between adjacent fingers.

14 shows another embodiment using triangular fingers. There is formed a complete joint with respect to the center plane 172 and the planes 171 to 174 on both sides thereof. The upper and lower triangular fingers or protrusions 180 and 181 extend to the plane 172 and 173 closest to the center plane 170 and the other two triangular fingers 182 and 183 extend to the And extend to the outer planes 171, 174. The cutting surfaces required in connection with the joints as described above can be formed by sawing, cutting with a hot or cold cutting knife or other suitable manner. A saddle or patch may be provided for the slider fabric 130 to reinforce the joint, these saddles being labeled "164" in FIG. The saddle 164 may have a width sufficient to cover the joint over the full 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 manually or otherwise coating a TPU or other suitable adhesive.

Then, the handrail end portions 131 and 132 are assembled in the molding apparatus 10. The joint is then completed. When the material is removed by the formation of the cut surface, for example, the material removed by the cut surface 136 provides a replacement sheet 158. In addition, an alternate upper cap 160 is provided for the portions 140 removed at each end portion. This alternative cap 160 is cut using a band saw, a knife, or a hot cut knife. When cutting is performed using a band saw, the thickness of the band saw, i.e., removal of the material from the hand rail ends 131 and 132, But there is no need to make such tolerances when using a knife. In the case of a more complex handrail structure, one or more inner fabric layers may be present. Hand rail ends are prepared in the same manner by separating each of the fabric layers added thereafter from the hand rails by horizontal cut surfaces formed above and below it. The joints are longitudinally spaced from one another along the handrail so that they are not aligned in line with one another. Generally, these additional fabric layers are provided for the purpose of improving the lap strength of the handrail without increasing the longitudinal strength of the handrail, since the strength of longitudinal joints to the fabric layers is not critical. However, for certain applications it may be desirable to provide some form of coupling fingers for additional fabric layers as is the case for joints as described above.

Any standard press tool can be used, shown in Figures 11 and 12, with a press tool 56 having a pivotable top between the open and closed positions. As described below, the closed mold needs to maintain sufficient pressure while allowing leakage of excess material. As described below, the mold is slightly oversized because the TPU is not initially pressurized.

Thereafter, cooling water is passed between the upper and lower members of the first and second forming end portions (4, 16). The reason for doing this is to keep the handrail portions in the formed end portions 14, 16 in a cooled state to prevent the handrail from melting again at that portion. At the same time, power is supplied to the heating elements to heat the central forming part 12. As a result, the polymer is remelted in the central forming portion 12, resulting in bonding to form a single lowered joint.

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

To this end, the dimensions of the mold are determined so that the TPU can be pressed into contact with the interior of the mold before the ends of the hand rails are significantly inflated by thermal expansion. In particular, since only steam bubbles can be discharged from the melted thermoplastic plastics, sufficient pressure is generated to prevent the occurrence of vapor bubbles during the entire period during which the handrail ends are melted, i.e., before the handrail ends are melted The dimensions of the mold are determined. In this case, the pressure will be determined by the load applied and the dimension of the mold. Since the portions adjacent to the handrail portions remain in a cooled state and are not melted, no pressure is applied to the molds at these portions. The gap of the mold is selected so as to prevent the occurrence of vapor bubbles at the forming temperature of the joint by the pressure thus generated.

If excess material is present, this excess material will open the mold slightly. That is, the upper and lower members 12a, 12b of the central forming part will be slightly more easily spaced apart in the vertical direction, and excess material will flow out into the groove 40 '. When high pressures are used, we have found that the excess material causes the handrail ends to come out slightly from the mold, which in turn will result in pressure reduction. It can be appreciated that there is a pressure drop P between the main handrail portion and the groove 40, which is responsible for the flow of material through the width of the channel formed between the two portions of the run, And the length L between the grooves 40 (see FIG. 9). 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, when the mold is slightly open and material flows into the grooves 40, the mold area where the pressure of the molten TPU acts in plan view will increase. Thus, the molten TPU will act not only in the cavity but also on the surface forming the channels extending into the groove 40. Although the average pressure in the mold will inevitably decrease slightly due to the constant load, the pressure is nevertheless still sufficient to prevent moisture from being converted to vapor or vapor bubbles.

When a sufficient excess TPU flows out into 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 (acting by the molten material) and the width of the mold becomes equal to the applied load.

The mold is heated to a sufficient temperature and is maintained for a period of time sufficient to provide a good joint in this state. At the end of this process, the power supply to all the heating elements except for the heating elements 20 for the mandrel 18 is stopped, and in this state, the cooling water is supplied to the upper and lower members 12a, 12b To re-solidify the materials around the joint. When the joint is completely cooled, stop the supply of cooling water and open the mold. If necessary, the mandrel 18 can be detached from the upper member 12a using the lifting groove 36. [

The TPU shrinks as it cools, resulting in a pressure drop 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, in this state the power supply to the heating elements still operating is stopped, and the mold is opened after this. If excess material is present, the surplus material can be trimmed using a knife and the edges of the handrail can be trimmed quickly and simply, thus giving the handrail a smooth, uniform appearance, The normal user can not visually confirm it. Strong joints with characteristics corresponding to the main body of the handrail are provided according to the reversal of the wires.

Also, during formation of the joints, the temperature is maintained high enough to ensure good integration of the various thermoplastic layers, so that the thermoplastic layers are completely merged together through the joints.

Suitable as a handrail material are polyurethane thermoplastic elastomers which are well adhered to the wire, have good durability and abrasion resistance, good tear resistance and good adhesion to the slider fabric, . However, thermoplastic polyurethanes tend to expand considerably when heated. For this reason, the mold is manufactured in a state of being oversized to a predetermined degree. This oversize is done over the entire length of the mold, and as a result of the experiment, satisfactory results were obtained. Preferably, a lower limit is given to oversize. If a uniform size is provided over the entire length of the mold to homogenize the finishing of the joint, the joints can not be visually confirmed. Accurate measurements along the length of the joints show that there are dimensional variations of the order of a few thousandths, but such dimensional changes occur only over a distance of a few inches and as a result can not be confirmed by the normal user's eyes . The larger the thermal expansion of the joint, the greater the shrinkage of the joint during cooling. As a result, the joint area becomes slightly smaller than the portion of the main handrail, but is joined to the main handrail body by smoothly tapered portions that are not readily visible to the ordinary user.

It is important to cut the other parts of the pattern considerably precisely when forming a woven pattern for the joint so that the amount of material present and the amount of material required to refast the joint are the same. If too much material is present to such an extent that a significant amount flows through the edge of the mold, the wire ends are laterally displaced by the lateral flow. As a result, as the wire ends are displaced and the joints are twisted, the mechanical properties of the joints are adversely affected. The ideal case is to minimize the flow of excess material, in which case the wire ends remain substantially stationary and the wire ends remain aligned and in the required alignment to provide strong joints do.

The sloped cut surface 134 or the slider fabric is provided with other types of cut surfaces to avoid forming a fully square cut surface on the slider fabric 130. [ By providing a sloped cut surface, the joint can move more smoothly and alleviate the risk of damage during use. In addition, the tensile load can thereby be effectively transmitted across the joint in the slider fabric 130. If a square joint or a butt joint is provided to the fabric 130, the joint will be opened by a tensile load, for example, if the handrail is to be bent back on a given drive assembly. The saddle for the fabric will reinforce the joint and deliver tensile loads.

Although the present invention has been described above with reference to the handrail, it goes without saying that the present invention is also applicable to any article formed of a thermoplastic material and having a constant cross-sectional shape. For example, the present invention is often applicable to conveyor belts having similar properties in many ways to handrails. Typically, the conveyor belt includes a reinforcement wire or other extension restraining member that provides the strength and elasticity required thereof. Conveyor belts can often be glued on one side of the fabric layer. Typically, the conveyor belt has a simple rectangular cross-section, and thus the work of forming a woven pattern through the full depth of the conveyor belt and assembling it in a suitable mold can be achieved simply.

Fig. 12 is a flowchart for explaining a step of joining hand rails without disassembling the escalator according to the first embodiment. Fig.

It is possible to provide a first handrail extracting step in which a part of the first handrail mounted on the escalator apparatus in the stopped state is cut off and the end of the cut first handrail is taken out to the outside have.

In S301, the side surface of the cover of the first handrail formed of a thermoplastic material is cut to a depth of 10 to 20 mm from the end of the first handrail to a point of 275 mm, and the cover of the cut first handrail is rolled up The first handrail cover removing process can be provided.

In S302, the side of the wire set was cut to 1 mm depth from the end to a position of 270 mm in order to divide the wire set consisting of 20 subwires installed under the cover of the first handrail, Can be provided on the cover.

In step S303, the set of separated wires is returned to the original position, and a set of the first sub-wires of the 20 sub-wires included in the wire set is cut to a point 250 mm from the end of the set of wires. A pair of second sub-wires located next to the first sub-wire set is cut to a point 188 mm from the end of the wire set, and a pair of third sub-wires set next to the pair of second sub- Wire cut to a point of 125 mm from the end of the set and the remaining sub-wire set to a point of 125 mm from the end of the wire set to cut the wire set into a top shape, Separation process can be provided.

At step S304, the slider is cut along a predetermined distance from both edges of the slider located at the lower end of the separated wire to separate the slider from the rubber protector, and the slider is cut and removed from the end of the slider to a point of 125 mm. Can be provided.

In operation S305, a cover for a second handrail formed of a thermoplastic material is separated, a wire set is separated, a subwire is separated into a reverse-tower shape, and a slider is detached and brought into contact with the first handrail 2 handrail bonding process.

In S306, the portion where the second handrail and the first handrail abut each other is heated using the central forming portion so that the thermoplastic material constituting the first handrail and the second handrail melts to form a mushroom joint And can provide a welding process for stopping the operation of the central forming part when the mushroom joint is formed to 2 to 3 mm.

In S307, the cooling process for cooling the first handrail and the second handrail combined through the welding process can be provided.

In step S308, the wire set of the top shape of the first handrail is placed over the first handle rail and the second handrail, One wire of the first hand rail and the second set of wires of the second hand rail can be brought into contact with each other.

At step S309, the wire set of the first handrail and the wire set of the second handrail are heated to 300 占 폚, and at the same time, the wire set of the first handrail and the second hand It is possible to provide a wire welding process in which a wire set of a rail is rolled by a roller so as to be coupled to the slider.

At S310, the cover of the first handrail and the cover of the second handrail are covered on the wire set of the combined first handrail and the set of wires of the second handrail, and then the cover of the first handrail and the cover The cover of the first handrail and the cover of the second handrail are fused to each other by applying a temperature equal to or higher than the melting point according to the material of the cover of the second handrail and then cooled at a temperature below the melting point, Process can be provided.

In operation S311, the first handrail formed with the cover joint and the mushroom joint formed at the lower end of the second handrail are removed, and a heat of 300 to 350 DEG C is applied to the portion where the mushroom joint is removed for one minute, And removing the removed portion of the mushroom joint by melting and recombining the mushroom joint.

At step S312, the first handrail and the second handrail may be combined to provide a molding process.

The molding process S312 may be performed by pressurizing the combined first handrail and the second handrail 200 bar under a temperature condition of 210 to 320 in a closed state.

In step S313, the combined first handrail and the second handrail are inserted into the escalator machine, and the other end of the first handrail cut out by applying a predetermined force is extracted to the outside have.

At step S314, a predetermined length of the first handrail extracted to the outside according to the input of the user may be cut off to remove the old portion of the first handrail. And

The endless rail forming process of joining the first end of the first handrail and the end of the second end of the second handrail can be provided at S315. The endless rail forming step (S315) of the present invention starts by foaming a thermoplastic adhesive to a portion where the other ends of the first handrail and the second handrail come into contact with each other, forming a joint under a temperature of 75 to 150 DEG C and a pressure of 2 Mpa And when the temperature of the jointed portion drops to 60 占 폚 or less, a connecting cloth having a firing point of 60 占 폚 or more is poured, and then cooled to join the joint and the connecting cloth.

The thermoplastic adhesive may comprise 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 polyurethaneurea resin having an acid value of 35 to 45 mg KOH / g .

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

The first handrail and the second handrail, by virtue of the initiation, consist of a thermoplastic carbon polymer composition that can be remoulded at ambient temperature.

The thermoplastic carbon polymer composition also includes (A) a thermoplastic organic polymer comprising from 20 to 40% by weight of a styrenic non-crosslinkable elastomer, from 10 to 30% of an acrylic styrene copolymer and from 50 to 90% by weight of a thermoplastic polyurethane, (B1) (B1a) a diorganopolysiloxane gum having an average of at least two alkenyl groups per molecule, and (B1b) a silicone comprising 55 to 61% by weight silica based on the diorganopolysiloxane gum (B1a) Base and (B2) an organohydridosilicon compound containing at least two silicon-bonded hydrogen groups on average on average per molecule, wherein the thermoplastic organic polymer (A) to the silicone composition (B) And the weight ratio is 62:38.

Further, after the process of removing the mushroom joint, it is possible to provide a saddle attaching process for increasing the engaging force between the first handrail and the second handrail by attaching the saddle member from the center to the edge of the lower ends of the first handrail and the second handrail have

After the molding process, the bonded first and second hand rails are maintained at a temperature of 120 to 150 ° C for 10 to 15 minutes, maintained at a temperature of 20 to 24 ° C for 5 to 6 minutes, A temperature of 170 to 190 DEG C is maintained for about 25 minutes to confirm whether the first handrail and the second handrail have melted or not. If the handle rail is melted, it is judged to be defective and the molding is performed again.

Wherein the silica is present in an amount of 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.

FIG. 13 is a view showing that the separated subwires according to one embodiment are cut into a top shape. FIG.

By virtue of the initiation of the first handrail, the subwires can be cut into a top shape. This is to groov so that the wires of the first handrail and the wires of the second handrail can more effectively engage.

A pair of first sub-wires 1300 of the 20 sub-wires included in the wire set is cut to a point 250 mm from the end 1305 of the wire set, and a pair of first sub- A pair of second sub wire sets 1301 are cut from the end 1305 of the wire set to a point of 188 mm and a pair of third sub wire sets 1301 located next to the pair of second sub wire sets 1301, The wire set 1302 may be cut to a point 125 mm from the end 1305 of the wire set and the remaining sub wire set 1303 may be cut to a point 125 mm from the end 1305 of the wire set, have. At this time, only the remaining four sub-wire sets 1304 maintain their original length.

14 is a view showing a state in which a sub wire of the first hand rail and a sub wire of the second hand rail are engaged with each other according to the first embodiment.

At this time, twenty subwires included in the second handrail are cut with a length corresponding to the subwires cut into the top shape of the first handrail, and the subwires of the first handrail and the subwires of the second handrail And further cut 1 mm of the sub wire of the second handrail so as not to overlap with each other

That is, a situation in which the wire set of the first handrail and the wire set of the second handrail overlap each other is not smoothly combined, and partial overlapping occurs to prevent a situation where accurate coupling is not achieved.

At this time, a distance of 1 mm between the wire set of the first handrail and the wire set of the second handrail can be completely bonded in the process of applying heat to the wire set and rolling.

It will be apparent to those skilled in the art that various modifications, additions and substitutions are possible, without departing from the spirit and scope of the invention as defined by the appended claims. Should be regarded as belonging to the above-mentioned patent claims.

In the above-described exemplary system, although the methods are described on the basis of a flowchart as a series of processes or blocks, the present invention is not limited to the order of the processes, and some processes may occur in different orders or simultaneously . It will also be appreciated by those skilled in the art that the processes shown in the flowcharts are not exclusive and that other processes may be included or that one or more processes in the flowchart may be deleted without affecting the scope of the present invention.

Claims (7)

In the step of joining the handrail without disassembling the escalator,
A first handrail extracting step of cutting a part of the first handrail mounted on the escalator apparatus in an operation stopped state and taking out the end of the cut first handrail to the outside;
A first handrail cover separating step of cutting the side surface of the cover of the first handrail to a depth of 10 to 20 mm from the end of the first handrail to a point of 275 mm, and to roll up the cover of the cut first handrail;
The side of the wire set is cut to a depth of 1 mm from the end to a point of 270 mm so as to divide the wire set consisting of 20 subwires provided under the cover of the first handrail, A scraping wire set separation process;
Returning the separated wire set to its original position, cutting a pair of first sub-wires of the twenty sub-wires included in the wire set to a point of 250 mm from the end of the wire set, A pair of second sub-wires located next to the wire set is cut to a point 188 mm from the end of the wire set and a pair of third sub-wires set next to the pair of second sub- Cutting the wire set to a point of 125 mm from the end of the set and cutting the remaining set of sub wires to a point of 125 mm from the end of the wire set to cut the wire set into a tower shape, A subwire separation process to be carried out;
A slider separating step of separating the slider from the rubber protector by cutting along a predetermined distance from both edges of the slider located at the lower end of the separated wire, and cutting the slider to a point of 125 mm from the end of the slider;
A second handrail joining step of separating the cover of the second handrail, separating the wire set, separating the subwires into a reverse tower shape, separating the slider and engaging with the first handrail;
A portion of the second handrail and the first handrail abutted against each other is heated using a central forming portion so that the thermoplastic material constituting the first handrail and the second handrail melts to form a mushroom joint, A welding step of stopping the operation of the center forming part when the thickness is 2 to 3 mm;
A cooling step of cooling the first handrail and the second handrail coupled through the welding process;
The wire set of the top shape of the first handrail is placed over the first handle rail and the second handrail and the wire set in the shape of the inverted tower of the second handrail is passed over the second handrail and the first handrail The wire set of the first handrail and the set of wires of the second handrail abut each other;
The wire set of the first handrail and the wire set of the second handrail are heated by applying heat of 300 DEG C to the wire set of the combined first handrail and the second handrail, To a slider;
The cover of the first handrail and the cover of the second handrail are covered on the set of wires of the combined first handrail and the set of wires of the second handrail and then the cover of the first handrail and the cover of the second handrail A cover welding step of forming a cover joint by fusing the cover of the first handrail and the cover of the second handrail by applying a temperature equal to or higher than the melting point according to the material of the cover and then cooling at a temperature below the melting point;
The mast joint formed at the lower end of the first handrail and the second handrail having the cover joint formed thereon is removed and a portion of the mast joint is removed by applying a heat of 300 to 350 DEG C for 1 minute to the portion where the mast joint is removed A mushroom joint removal process for melting and recombining;
A molding process for molding the combined first and second hand rails;
Inserting the combined first handrail and second handrail into the escalator machine and extracting the other end of the cut first handrail to the outside by applying a predetermined force;
Cutting a predetermined length of the first handrail extracted to the outside according to a user's input to remove an old portion of the first handrail; And
And an endless rail forming step of joining the first handrail from which the old part is removed and the other end of the second handrail to each other, joining the handrail without disassembling the escalator. The method according to claim 1,
In the endless rail forming step,
Forming a joint at a temperature of 75 to 150 DEG C and a pressure of 2 MPa, and forming a joint between the first handrail and the second handrail,
Wherein a connecting cloth having an ignition point of 60 DEG C or higher is poured and then cooled to join the connecting cloth to the connecting cloth when the temperature of the portion where the seam is formed falls below 60 DEG C, fair. 3. The method of claim 2,
The thermoplastic adhesive may contain,
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 polyurethaneurea resin having an acid value of 35 to 45 mg KOH / g,
And the thickness of the joint is not less than 1 mm and not more than 1.5 mm, and joining the handrail without disassembling the escalator. The method according to claim 1,
In the molding step,
And joining the hand rails without disassembling the escalator, wherein the combined first and second hand rails are pressurized to 200 bar under the temperature condition of 210 to 320 in the closed state. The method according to claim 1,
And a saddle attaching step of attaching the saddle member from the center of the lower end of the first handrail and the edge of the second handrail to increase the coupling force between the first handrail and the second handrail after the process of removing the mushroom joint A step of joining the handrail without disassembling the escalator. The method according to claim 1,
After the molding process, the combined first and second hand rails are maintained at a temperature of 120 to 150 ° C for 10 to 15 minutes, maintained at a temperature of 20 to 24 ° C for 5 to 6 minutes, And a handrail coupling test step of maintaining a temperature of 170 to 190 for 25 minutes to confirm whether the first handrail and the second handrail have melted or not. fair. The method according to claim 1,
The second handrail coupling process may include:
The subwires of the first handrail and the subwires of the second handrail are cut in a length corresponding to the subwires cut in the shape of the top of the first handrail, Further comprising cutting the sub wire of the second hand rail by 1 mm so as not to overlap the hand rail.

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