JP3626030B2 - Escalator handrail connecting method and handrail suturing apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention, when replacing an existing handrail of an escalator with a new handrail, a handrail connection method of an escalator that stitches canvases at both ends of a new handrail that is not connected endlessly into an endless shape, The present invention relates to a handrail stitching device used for the stitching operation.
[0002]
[Prior art]
Generally, escalator handrails deteriorate over time, so existing handrails that have been used for a predetermined period must be replaced with new handrails.
[0003]
When performing this kind of handrail replacement work, if an endless new handrail is to be directly attached to the escalator, a number of members including the drive unit and tension weight in the gantry must be removed and reattached. There is a problem that it takes a lot of time and labor.
[0004]
Therefore, a new handrail that is not connected endlessly and has both ends is temporarily connected to the cut portion of the existing handrail, and a part of this new unconnected handrail is pulled into the escalator frame and installed. A technique has been conventionally proposed in which after the handrail is removed, the canvases at both ends of the new handrail are stitched on the tread to make them endless, and this is attached to the handrail guide.
[0005]
In such a prior art, the connection length of the unvulcanized portion is determined for both ends of the unconnected new handrail, and the dimensions are taken and cut on the tread. In other words, a plurality of unvulcanized canvases (for example, 5 sheets) constituting one end of a new unconnected handrail and a tensile body are inserted with a marking line dimensioned based on the total length of the handrail, After cutting along the marking line, similarly insert predetermined marking lines on the unvulcanized canvas and the tensile body constituting the other end of the newly installed handrail, Cut along this marking line. After that, match the cut surfaces of the both ends of the new handrail, and stitch the canvases manually with thread and needle, glue the stitched canvases together, and lap joint the tensile bodies together Work, etc., connect the new handrail endlessly. In addition, when the stitching of unvulcanized canvases is completed in this way, vulcanization molding of decorative rubber using a vulcanizer is performed on the canvas of the unvulcanized portion, and the same cross section C as that of the already vulcanized portion It is shaped like a letter.
[0006]
[Problems to be solved by the invention]
Although the above-mentioned conventional technology aims to improve the efficiency of escalator handrail replacement work by connecting new handrails that are not connected endlessly at the site, the both ends of unconnected new handrails Since dimensioning and cutting of canvas and tensile body is performed on the local tread, it is not easy to accurately insert or cut the marking line, and therefore, the work time is prolonged and quality reliability due to dimensional errors is reduced. There was a problem that it was easy to cause a decrease.
[0007]
In addition, in this conventional technique, a plurality of canvases at both ends of a new handrail are sewn by sewing using threads and needles. The canvas of the handrail is a thick woven canvas coated with unvulcanized rubber. Since it is very hard, hand-sewing is a heavy labor, and in the case of hand-sewing, there is a problem that variations in the stitching interval, stitching width, etc. are likely to occur.
[0008]
Furthermore, in such a conventional technique, the tensile bodies at both ends of the new handrail are lap-joined, but the tensile bodies fixed with adhesive rubber are scattered by cutting, so the tensile bodies Lap jointing the body is quite cumbersome and requires a long working time.
[0009]
The present invention has been made in view of such problems of the prior art, and a first object thereof is to provide a handrail connection method for an escalator that can greatly reduce work time in the field and ensure quality reliability. There is to do. The second object of the present invention is to provide an escalator handrail stitching device suitable for use in such a handrail connection method.
[0010]
[Means for Solving the Problems]
In order to achieve the first object described above, the present invention is an endless existing handrail having a C-shaped cross section that runs in synchronization with an endlessly connected tread and is made of a canvas, a tensile body, and a decorative rubber. Is replaced with a new handrail, the cut part of the existing handrail is temporarily connected to a new handrail that is not connected endlessly and has both ends, and a part of this unconnected new handrail is In the escalator handrail connection method for making the endless shape by sewing the canvases at both ends of the newly installed handrail on the tread board after removing the temporary connection after being pulled into the gantry, newly installed on the tread board The both ends of the handrail are arranged to face each other, and the canvases at the both ends are sequentially sewn with a mechanical suturing device installed on the tread board. It distinguished from the suture canvas to the possible allowed to placement. In this way, the sewing operation of the canvas by the mechanical stitching device can be performed smoothly, so that the workability can be greatly improved and variations in the stitching interval and the stitching width can be avoided as compared with the case where the canvas is stitched by hand. Uniform stitching.
[0011]
Further, in such a handrail connection method, an unconnected new handrail disposed on the lower side of the escalator on the tread board is supported by an operator or a support worker, and the unsewn canvases at the opposite ends are horizontally arranged. It is preferable to perform the suturing operation while keeping it because the canvas being sewn does not apply an excessive force in the horizontal direction to the suturing needle, and therefore the suturing operation by the mechanical suturing apparatus can be performed more smoothly. .
[0012]
Further, in such a handrail connection method, the size and cutting of one end of the unconnected new handrail with respect to the canvas and the tensile body are temporarily connected, and the other end of the new handrail is temporarily connected to the existing handrail. It is completed before the step of drawing in (for example, at the time of factory shipment), and dimensioning and cutting of the canvas and the tensile body at the other end are performed with the canvas and the resistance at the one end opposed to each other on the tread. If it is performed in accordance with the tension body, the work time required for on-site dimensioning and cutting can be greatly shortened, and the dimensional accuracy can be increased to improve the quality reliability, which is preferable.
[0013]
In addition, if the length dimension from the canvas and the vulcanized end face of the tensile body at the other end of the new handrail is set in advance by a predetermined length adjustment allowance, a length measurement error or the like will be postponed. It can be corrected.
[0014]
Further, in such a handrail connection method, if the tensile bodies at both ends are lap-connected in the middle of the sewing operation of the new handrail, the working time is longer than when the tensile bodies are lap jointed. Is preferable because it can be greatly shortened.
[0015]
Further, in such a handrail connection method, if the sewing operation of the new handrail is sequentially performed from the sewing of the canvases on the decorative rubber side, good workability can be expected.
[0016]
Further, in such a handrail connection method, if the newly constructed handrails are bonded together in a state where tension is applied to the new handrail from the escalator lower side and the escalator upper side during the sewing operation of the new handrail, It is possible to remove the sag that can occur in the stitched canvas.
[0017]
On the other hand, in order to achieve the second object described above, the present invention is configured such that the mechanical suturing apparatus includes the guide space having an inclined surface having an angle substantially equal to one end of the canvas to be sewn. When such a mechanical suturing device is used, the canvas can be easily moved in a predetermined direction at the time of suturing, so that work efficiency can be improved.
[0018]
Further, it is preferable that the mechanical suturing device is provided with a heating device for heating the canvas during the suturing operation because the unvulcanized rubber applied to the canvas is softened and easily sewn.
[0019]
Further, it is preferable that the mechanical suturing device is provided with a sewing direction switching holding mechanism because double sewing of the side end portion of the canvas is facilitated.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to FIGS. However, FIG. 1 is an explanatory view showing a state in which canvases at both ends of an unconnected new handrail are stitched together by a mechanical stitching device, FIG. 2 is a perspective view of a main part of the mechanical stitching device, and FIG. FIG. 4 is an explanatory view showing a side shape of a guide space of the mechanical suturing apparatus, FIG. 5 is an explanatory view showing canvases and tensile bodies at both ends of the new handrail, and FIG. The flowchart which shows the procedure of the canvas stitching | working operation | work in a form example, FIG. 7 is the side view which shows the whole structure of the escalator which concerns on this embodiment, FIG. 8 is explanatory drawing which shows the component of the handrail of an escalator.
[0021]
First, the overall configuration of an escalator that is going to perform handrail replacement work will be briefly described with reference to FIG. In the figure, an escalator generally indicated by reference numeral 1 is built into a gantry 11 composed of an upper truss 12 and a lower truss 13 and framed with a shape steel or the like so as to support all components, or an upper truss 12. A driving machine and a main driving device (not shown), a step chain gear (not shown) incorporated in the lower truss 13, and a tread plate connected endlessly and driven by the driving device and the main driving device in the gantry 11 (Reference numeral 5 in FIG. 1), and an existing handrail 2 that is driven by handrail drive wheels 14 that use the drive unit and the main drive unit as drive sources.
[0022]
The drive machine drives the main drive device via a drive chain (not shown). The main drive device drives the tread plate via a step chain (not shown), and a handrail chain and a handrail (not shown). The existing handrail 2 is driven via the drive wheel 14. At this time, the step chain travels as prescribed by the step chain gear and a step chain extending device (not shown) without sagging on the way. Similarly, the existing handrail 2 travels as prescribed by the handrail extension device 15 without sagging on the way. The existing handrail 2 is supported by a handrail guide roller (not shown), a guide with an unillustrated brim for preventing meandering provided in the gantry 11, and a balustrade pillar standing on the gantry 11. It is assembled endlessly along a handrail guide (not shown) and the like, and travels in synchronization with the treadle while being guided by these.
[0023]
When replacing the existing handrail 2 of such an escalator 1, first, the existing handrail 2 is moved at the handrail turn-up portion (R portion) 3 near the upper entrance / exit and the handrail return portion 4 near the lower entrance / exit. A new handrail 40 that is not connected endlessly and has both end portions 50 and 51 as shown in FIG. 1 is temporarily connected to one cut portion, for example, a cut portion on the upper entrance / exit. As shown in FIG. 8, this new handrail 40 is composed of a total of five canvases 91 to 95, a tensile body 96, and a decorative rubber 97. Sulfur molded. In addition, dimensioning and cutting of the canvas 91 to 95 and the tensile body 96 at the one end 50 of the new handrail 40 are completed in advance at the time of shipment from the factory. Then, the other end portion 51 of the new handrail 40 is temporarily connected to the cutting portion of the existing handrail 2 and pulled into the mount 11 from the upper entrance / exit side, and the other end 51 is connected from the lower entrance / exit side. After taking out and removing the temporary connection with the existing handrail 2, as shown in operation 1 in FIG. 6, the two end portions 50 and 51 of the new handrail 40 are placed on the tread plate 5 of the escalator 1 (see FIG. 1). Place them facing each other.
[0024]
Next, as shown in operation 2 in FIG. 6, the dimensioning and cutting operations for the canvas 91 to 95 and the tensile body 96 of the other end 51 of the new handrail 40 are completed in advance. This is performed in accordance with the canvas 91 to 95 and the tensile body 96 at one end 50. Specifically, as shown in FIG. 5 on the tread, the tip 111 of the other end 51 is aligned with the vulcanized end face 112 of the one end 50 of the new handrail 40, and the canvas of the other end 51 is While overlapping one by one, the sheet is cut in accordance with one edge 110 of the canvas of the one end 50 cut at a predetermined angle. In addition, if the length dimension from the canvas 91-95 of the other end part 51 of the newly installed handrail 40 and the vulcanized part end surface 113 of the tensile body 96 is set in advance by a predetermined length adjustment allowance 114. The measurement error can be corrected later.
[0025]
When the other end 51 of the new handrail 40 is cut into a predetermined shape in this way, a machine stitching device 70 having a work table 71 is installed at a predetermined work position on the tread plate 5 of the escalator 1 as shown in FIG. Then (work 3 in FIG. 6), after that, the support worker 61 supports the vicinity of the other end 51 of the new handrail 40 arranged on the lower side of the escalator (arrow 9 side) and becomes the target of stitching. The connecting worker 60 performs a sewing operation with the mechanical suturing device 70 while keeping the canvas 91 to 95 horizontal within the range indicated by the symbol L (operation 4 in FIG. 6). At this time, the canvas is stitched while being heated for about 1 minute by a heating device (not shown) provided in the mechanical stitching device 70. In this sewing operation, the connection worker 60 sequentially sews the plurality of canvases 91 to 95 at both ends 50 and 51 of the new handrail 40 from the fifth canvas 95 side. As shown in FIG. 2, the sewn canvas 100 is retracted into a predetermined guide space 73 of the mechanical suturing apparatus 70 to be distinguished from the unstitched canvas 101. As shown in FIG. 4, the guide space 73 of the mechanical suturing device 70 is provided with an inclined surface 74 having an angle substantially equal to that of one side edge 110 of the canvas to be sewn, and the work table 71. Are provided with leg portions 72 in order to keep the mechanical suturing device 70 horizontal on the treads 5 for two steps.
[0026]
This sewing operation is an operation process in which operations 2 to 4 in FIG. 6 are sequentially performed from the fifth canvas 95 to the first canvas 91 at both end portions 50 and 51 of the newly installed handrail 40. Includes a step of lap-connecting the tensile bodies 96 after the third canvases 93 are stitched together. That is, the fifth canvas 95 at the other end 51 of the new handrail 40 is cut, and the fifth canvas 95 at both ends 50 and 51 is stitched by the mechanical suturing device 70 while being heated by the heating device. Next, after cutting the fourth canvas 94 at the other end 51, the fourth canvas 94 at both ends 50, 51 is retracted into the guide space 73 of the mechanical suturing device 70 after the stitched fifth canvas 95 is retracted. The two pieces are sutured by the mechanical stitching device 70 while being heated by the heating device. And after the end of sewing, if neoprene glue is applied between the fifth canvas 95 and the fourth canvas 94 and dried with the heating device, the upper side of the escalator is used to remove the wrinkles that are concerned after sewing. The sutured canvases 100 (the fifth canvas 95 and the fourth canvas 94) are bonded together in a state where tension is applied by pulling from the lower side of the escalator (arrow 8 side and arrow 9 side in FIG. 1). If the two stitched canvases 100 are bonded together in this way, similarly, the stitched canvas 100 is retracted to the guide space 73 when the third canvases 93 at both ends 50 and 51 are stitched while being heated. The third canvas 93 that has been sewn is pasted to the stitched fourth canvas 94 that has been applied with neoprene glue and dried in a state in which tension has been applied to remove the twist. Thereafter, the tensile bodies 96 of the both end portions 50 and 51 are connected to each other by wrapping, and the tensile body 96 is bonded to the stitched third canvas 93 applied with neoprene glue and dried. Similarly, in the state where the sutured canvas 100 including the tensile body 96 is retracted to the guide space portion 73, the second canvases 92 at both end portions 50 and 51 are stitched and bonded to the sutured canvas 100. Next, in a state where the sutured canvas 100 including the second canvas 92 is retracted to the guide space portion 73, the first canvases 91 at both end portions 50 and 51 are sutured and bonded to the sutured canvas 100.
[0027]
Thus, the new handrail 40 can be connected endlessly by performing the stitching operation on the canvases 91 to 95 of the both ends 50 and 51 of the unconnected new handrail 40 and the lap connection operation on the tensile body 96. Therefore, vulcanization molding of the decorative rubber 97 using a vulcanizing pot (not shown) is performed on the unvulcanized portion of the canvas 91 to 95 to obtain a C-shaped cross section similar to that of the already vulcanized portion. . If the new endless handrail 40 having a predetermined shape is completed on site, the handrail replacement operation is completed by attaching it to the handrail guide of the escalator 1.
[0028]
As described above, in this embodiment, when the canvases of the both end portions 50 and 51 of the unconnected new handrail 40 are stitched together, the opposite end portions 50 and 51 on the tread plate 5 are held horizontally. Since the stitching is performed by the mechanical suturing device 70, not only the working time can be greatly shortened as compared with the conventional hand-sewn stitching, but also a uniform finish stitching can be performed and the reliability is improved. In this embodiment, the support worker 61 supports the both ends 50 and 51 in a horizontal position, but they may be supported by support workers.
[0029]
In the present embodiment, the dimensioning and cutting of the one end 50 of the unconnected new handrail 40 is completed at the time of shipment from the factory, and the other end 51 is aligned with the one end 50 on the tread plate 5. Since dimensioning and cutting are performed, not only can the work time required for on-site dimensioning and cutting be greatly reduced, but also the dimensional accuracy can be improved.
[0030]
Further, in the present embodiment example, the both ends 50 and 51 of the new handrail 40 are used by using the mechanical suturing device 70 having the guide space portion 73 for retracting the sewn canvas 100 from the unstitched canvas 101. Since the canvases are sewn together, the suturing operation can be performed smoothly. In view of the fact that one side edge 110 of each of the canvases 91 to 95 is shifted and is cut obliquely in order to avoid stress concentration on the stitched portion, in the present embodiment, the guide space portion 73 has Since the inclined surface 74 having an angle substantially equal to that of the one end 110 is provided, the canvas can be easily moved in a predetermined direction at the time of sewing.
[0031]
In addition, the mechanical suturing device 70 used in this embodiment is provided with the heating device for heating the canvas during the suturing operation, so that the unvulcanized rubber applied to the canvas is softened and sewn. It has become easier. Since the mechanical suturing apparatus 70 includes a sewing direction switching and holding mechanism (not shown), the side reliability of the canvas can be double stitched by a predetermined distance to improve quality reliability.
[0032]
【The invention's effect】
The present invention is implemented in the form as described above, and has the effects described below.
[0033]
In the escalator handrail connection method in which canvases at both ends of an unconnected new handrail are stitched together to make an endless shape, the both ends of the new handrail are placed facing each other on the treadboard, installation was with sequentially sewn canvas of the both end portions in the mechanical suturing device, during the suturing operation, since the suture already canvas previously distinguished by placed to non suture canvas, smoothly suturing operation canvas by mechanical suturing device Compared with the case where the canvas is sewn by hand stitching, the workability is greatly improved, and variations in the stitching interval and stitching width can be avoided and uniform stitching can be performed.
[0034]
Further, in such a handrail connection method, an unconnected new handrail disposed on the lower side of the escalator on the tread board is supported by an operator or a support worker, and the unsewn canvases at the opposite ends are horizontally arranged. If the suturing operation is performed while keeping, the canvas being sewn does not apply an excessive force in the horizontal direction to the suturing needle, so that the suturing operation by the mechanical suturing apparatus can be performed more smoothly.
[0035]
Further, in such a handrail connection method, the size and cutting of one end of the unconnected new handrail with respect to the canvas and the tensile body are temporarily connected, and the other end of the new handrail is temporarily connected to the existing handrail. It is completed before the step of drawing in (for example, at the time of factory shipment), and dimensioning and cutting of the canvas and the tensile body at the other end are performed with the canvas and the resistance at the one end opposed to each other on the tread. If it is performed in accordance with the tension body, the work time required for on-site dimensioning and cutting can be greatly shortened, and the dimensional accuracy can be increased to improve the quality reliability.
[0036]
In addition, if the length dimension from the canvas and the vulcanized end face of the tensile body at the other end of the new handrail is set in advance by a predetermined length adjustment allowance, a length measurement error or the like will be postponed. It can be corrected.
[0037]
Further, in such a handrail connection method, if the tensile bodies at both ends are lap-connected in the middle of the sewing operation of the new handrail, the working time is longer than when the tensile bodies are lap jointed. Can be greatly shortened.
[0038]
Further, in such a handrail connection method, if the sewing operation of the new handrail is sequentially performed from the sewing of the canvases on the decorative rubber side, good workability can be expected.
[0039]
Further, in such a handrail connection method, if the newly constructed handrails are bonded together in a state where tension is applied to the new handrail from the escalator lower side and the escalator upper side during the sewing operation of the new handrail, It is possible to remove the sag that can occur in the stitched canvas.
[0040]
In addition, if the mechanical suturing apparatus includes the guide space having an inclined surface having an angle substantially equal to one side edge of the canvas to be sewn, the canvas can be easily moved in a predetermined direction at the time of sewing. Can be increased.
[0041]
Further, if the mechanical suturing device is provided with a heating device for heating the canvas during the suturing operation, the unvulcanized rubber applied to the canvas is softened and is easily sewn.
[0042]
Further, if the mechanical suturing device is provided with a sewing direction switching holding mechanism, it becomes easy to perform double stitching of the side end portion of the canvas.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a state in which canvases at both ends of an unconnected new handrail are stitched together by a mechanical stitching device.
FIG. 2 is a perspective view of a main part of the mechanical suturing apparatus.
FIG. 3 is a front view of the mechanical suturing apparatus.
FIG. 4 is an explanatory view showing a side shape of a guide space of the mechanical suturing apparatus.
FIG. 5 is an explanatory view showing a canvas and a tensile body at both ends of the new handrail.
FIG. 6 is a flowchart showing a procedure of a canvas stitching operation in the embodiment.
FIG. 7 is a side view showing the overall configuration of the escalator according to the embodiment.
FIG. 8 is an explanatory diagram showing components of the handrail of the escalator.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Escalator 2 Existing handrail 5 Tread 11 Stand 12 Upper truss 13 Lower truss 14 Hand rail drive wheel 15 Hand rail extension device 40 New hand rails 50 and 51 Both ends 60 (of the new hand rail) Connection worker 61 Support worker 70 Machine suturing device 71 Work table 73 Guide space 74 Inclined surface 91 to 95 Canvas 96 Tensile body 97 Cosmetic rubber 100 Sutured canvas 101 Unstitched canvas 110 (of canvas) One side edge 112, 113 Vulcanized part end surface 114 Length adjustment Generation

Claims (10)

When the existing endless handrail with C-shaped cross section made of canvas, tensile body and decorative rubber is replaced with a new handrail, the existing handrail is cut off. Part is temporarily connected to a new handrail that is not connected endlessly and has both ends, and after removing a part of this unconnected new handrail into the gantry, the temporary connection is removed, In the handrail connection method of the escalator that stitches the canvases at both ends of the new handrail on the tread to make them endless,
The both ends of the new handrail are placed facing each other on the tread, and the canvases at both ends are sequentially sewn with a mechanical suturing device installed on the tread. An escalator handrail connection method characterized by being arranged separately from a suture canvas. The handrail connection method of the escalator according to claim 1, wherein an unconnected new handrail disposed on the lower side of the escalator on the tread is supported by an operator or a support worker, and the both ends facing each other are not stitched An escalator handrail connection method comprising performing the suturing operation while keeping canvases horizontal. The handrail connection method for an escalator according to claim 1 or 2, wherein dimensioning and cutting of one end of the unconnected new handrail with respect to the canvas and the tensile body are performed, and the other end of the new handrail is connected to the existing handrail. Before the step of temporarily connecting to the frame and drawing it into the gantry, and dimensioning and cutting of the canvas and the tensile body at the other end are performed on the canvas at the one end opposed to the tread and An escalator handrail connection method characterized by being performed according to a tensile body. In the handrail connection method of the escalator according to claim 3 , the length dimension from the vulcanized part end face of the canvas and the tensile body of the other end part of the new handrail is previously increased by a predetermined length adjustment allowance. Escalator handrail connection method characterized by setting. The escalator handrail connection method according to any one of claims 1 to 4, wherein the tensile bodies at both ends are lap-connected to each other during the suturing operation of a new handrail. Handrail connection method. The escalator handrail connection method according to any one of claims 1 to 5, wherein the sewing operation of the new handrail is sequentially performed from the sewing of the canvases on the decorative rubber side. Rail connection method. Oite the handrail connection method escalator according to claim 6 any one, the state in the middle of the suturing operation of the new handrail, plus tension to new handrail from escalator lower side and the escalator upper side The handrail connecting method of the escalator characterized in that the stitched canvases are bonded together. The escalator handrail connection method according to any one of claims 1 to 7, wherein the canvas is sewed while being heated during the sewing operation of a new handrail. In the handrail stitching device of the escalator that stitches a plurality of canvases at both ends of the handrail into an endless shape,
A machine stitching device for sequentially stitching the plurality of canvases; a leg portion provided between the machine stitching device and the step for maintaining the machine suturing device horizontally on the step; an upper portion of the leg portion and the machine An escalator handrail stitching device comprising a guide space portion provided between a stitching device and a guide space for guiding a stitched canvas to be retracted from an unstitched canvas among the plurality of canvases. The handrail stitching device for an escalator according to claim 9, wherein the machine stitching device is provided with a sewing direction switching holding mechanism.

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