JP2017186099A - Escalator handrail shaft cutting support structure and handrail shaft cutting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of operators needed for the cutting operation of a handrail shaft and to reduce a burden on an operator in an escalator handrail shaft cutting support structure.SOLUTION: The handrail shaft cutting support structure includes: an upper fixing member that is hung and fixed to the top surfaces of two moving handrails; a first connecting member connected to the upper fixing member and a handrail drive shaft in the state of pulling each other; and a cutting device engaging member. The cutting device engaging member has: an annular member that is connected to the upper fixing member; and a cutting support part that is hung and connected to both-side parts with the lower end of the annular member set as a boundary. The cutting device engaging member can press the blade of a cutting device to the handrail drive shaft in the state of bending a U-shaped part formed at the lower end of the annular member passed through the bottom side of the handrail drive shaft, inserting the grip of the cutting device into the inside of an insertion part formed by the U-shaped part and the cutting support part, and engaging the grip with the cutting support part.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a handrail shaft cutting support structure and a handrail shaft cutting method for cutting a handrail drive shaft of an escalator.

  Conventionally, in an escalator, a moving handrail is provided around a balustrade and is circulated and driven in synchronization with the movement of a step. In the escalator, the main frame is arranged between a pair of entrances and exits, and the handrail drive shaft is rotatably supported in the main frame. The handrail drive shaft is driven through a chain by a motor as a drive source. The rotating force of the handrail drive shaft is converted into the moving force of the two left and right moving handrails by the handrail drive mechanism. Thereby, two moving handrails are moved.

  Patent Document 1 describes a method for replacing a handrail drive shaft. In this replacement method, first, the power transmission chain and the handrail drive chain are removed from the sprockets provided near both ends of the handrail drive shaft. Then, the flanges of the two bearing units provided near both ends of the handrail drive shaft are removed from the members fixed to the main frame of the escalator, and the handrail drive shaft is removed. Thereafter, a handrail drive shaft for replacement is newly attached at a predetermined position. Next, a power transmission chain and a handrail drive chain are wound around the sprockets near both ends of the handrail drive shaft.

JP 2011-219206 A

  In the method for exchanging the handrail drive shaft as described in Patent Document 1, since the handrail drive shaft is heavy and long, the operation of taking in and out the handrail drive shaft disposed in a narrow space is troublesome. As a result, it is conceivable to replace the handrail drive shaft currently incorporated in the escalator with a split-coupled handrail drive shaft. The split-joint type handrail drive shaft is formed by connecting a short split main shaft divided into two in the longitudinal direction. Then, in order to replace the existing handrail drive shaft with the split coupling type, it can be considered that the existing handrail drive shaft is cut and removed at the intermediate portion. Thereby, the existing handrail drive shaft may be easily taken out.

  However, if the supporting force on both sides of the cutting part is small when cutting the handrail drive shaft, the cutting device blades are inclined so that both side parts during and after cutting are at the cutting part. It is pinched strongly. For this reason, it is conceivable that an operator lifts both side portions by hand, but in that case, a lot of workers are required and labor is required. Further, when the operator holds the cutting device with a large force continuously for a long time during the cutting operation, the burden on the operator is large.

  An object of the present invention is to realize a handrail shaft cutting support structure and a handrail shaft cutting method for an escalator that can reduce the number of workers required for the handrail driving shaft cutting operation and reduce the burden on the worker.

  The handrail shaft cutting support structure for an escalator according to the present invention includes a main frame arranged so as to be spanned between a pair of entrances and two left and right moving handrails arranged so as to be able to circulate between the pair of entrances. A handrail drive shaft rotatably supported in the main frame, and a handrail drive mechanism that converts the rotational force of the handrail drive shaft into the movement force of the two moving handrails and moves the two moving handrails. A handrail shaft support structure for cutting the handrail drive shaft of the escalator, the upper upper fixing member being stretched over the upper surfaces of the two movable handrails, and a first longitudinal direction of the upper fixing member A first connecting member connected in a state of being pulled to a first position in the axial direction of the handrail drive shaft, an annular member connected to the upper fixing member, and a lower end of the annular member as a boundary. And a cutting device engaging member including a cutting support portion is stretched portion joined. The cutting device engaging member has a U-shaped portion formed at a lower end portion of the annular member that is passed below the handrail drive shaft and bent upward, and the U-shaped portion and the cutting support portion In the state where the gripping portion of the cutting device is inserted inside the insertion portion formed by surrounding the cutting portion and the gripping portion is engaged with the cutting support portion, the blade portion of the cutting device is pressed against the handrail drive shaft. Is possible.

  The handrail shaft cutting method for an escalator according to the present invention is a handrail shaft cutting method for cutting a handrail drive shaft of an escalator using the handrail shaft cutting support structure according to the present invention, wherein the upper side of the two movable handrails is above the upper side. A step of spanning and fixing a fixing member; and a step of connecting the first connecting member in a state of being pulled to the first position in the longitudinal direction of the upper fixing member and the first position in the axial direction of the handrail drive shaft; Passing the U-shaped part below the handrail drive shaft and bending it upward, inserting the gripping part of the cutting device inside the insertion part, and engaging the gripping part with the cutting support part And a step of pressing the blade portion of the cutting device against the handrail drive shaft and cutting the handrail drive shaft.

  According to the handrail shaft cutting support structure and handrail shaft cutting method of the escalator according to the present invention, the number of workers required for cutting the handrail drive shaft can be reduced, and the burden on the workers can be reduced.

It is the schematic of the escalator using the handrail axis | shaft cutting | disconnection support structure of embodiment of this invention. It is A arrow directional view of FIG. 1 in the state which removed the step. It is a figure which shows the division | segmentation type | mold handrail drive shaft. It is the figure which abbreviate | omitted one part and was the figure which looked at the escalator from the left-right direction one side, and is a figure which shows the method of cut | disconnecting a handrail drive shaft using the handrail shaft cutting | disconnection support structure of embodiment. FIG. 5 is a view as viewed in the direction of arrow B in FIG. 4 showing the upper fixing member. It is the figure seen from the lower side of FIG. 5A to the upper side. It is the C section enlarged view of Drawing 5B. It is a figure which shows the state which abbreviate | omitted one part and suspended the cutting device engaging member on the upper side fixing member in the state before cut | disconnecting a handrail drive shaft. FIG. 8 is a view corresponding to FIG. 7 showing a state immediately before the handrail drive shaft is cut by engaging the cutting device with the cutting device engaging member. It is a figure corresponding to Drawing 5A which shows another example of an upper part fixing member. It is the figure seen from the lower side of FIG. 9 to the upper side.

  Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. The material, shape, number, component arrangement, and the like described below are examples for explanation, and can be changed according to the specifications of the handrail shaft cutting support structure. Below, the same code | symbol is attached | subjected and demonstrated to the same structure.

  Drawing 1 is a schematic diagram of escalator 1 using handrail axis cutting support structure 40 of an embodiment. FIG. 2 is a view taken in the direction of arrow A in FIG. 1 with a step (not shown) removed. The escalator 1 includes a fixed structure 5 including a main frame 4 arranged so as to span between a pair of entrances 2 and 3 provided on upper and lower floors, a plurality of steps (not shown), left and right Two balustrades 6 and two belt-like moving handrails 7 and 8 are provided. The two balustrades 6 are erected on the upper side of the fixed structure 5 on both sides of the plurality of steps in the left-right direction. The fixing structure 5 is a structural part that supports other members, and constitutes a basic part of the escalator 1. In the present specification, the “left-right direction” refers to the left-right direction when the escalator 1 is viewed from the lower entrance / exit 3 toward the upper entrance 2.

  Passengers can get on and off the plurality of steps, are supported by the fixed structure 5 so as to be able to circulate, and are circulated by the transfer means 9. The transfer means 9 is provided inside the main frame 4. The transfer means 9 includes an electric motor 10 as a drive source, a drive sprocket (not shown), an upper sprocket 11, and a lower sprocket 12. The electric motor 10 is disposed on the upper floor side of the main frame 4. The drive sprocket is disposed on the upper floor side of the main frame 4. The rotational force of the electric motor 10 is transmitted to the drive sprocket via the drive chain 13. The upper sprocket 11 is fixed so as to have the same central axis with respect to the drive sprocket. The lower sprocket 12 is disposed on the lower floor side of the main frame 4.

  A step chain 14 is wound around the upper sprocket 11 and the lower sprocket 12. The plurality of steps are connected to a step shaft 15 (see FIG. 4), and the plurality of step shafts 15 are connected by a step chain 14. Thereby, the plurality of steps circulate and move by driving the electric motor 10.

  The two balustrades 6 are erected opposite to each other so as to sandwich the steps on both sides of the main frame 4 in the left-right direction. Each balustrade section 6 includes, for example, a glass or metal panel.

  Two moving handrails 7 and 8 are supported around each of the two balustrades 6. Each of the handrails 7 and 8 is provided so that the user 16 on the step can hold the hand and stabilize the body. The movable handrails 7 and 8 are formed in an endless shape, and are driven in synchronization with a plurality of steps by a first handrail drive shaft 19, a second handrail drive shaft 20, a first handrail drive mechanism 21a, and a second handrail drive mechanism 21b. The Thereby, the two moving handrails 7 and 8 are disposed between the pair of entrances 2 and 3 so as to be able to circulate.

  Specifically, the escalator 1 includes two left and right drive side handrail sprockets 18, a first handrail drive shaft 19 and a second handrail drive shaft 20, and a first handrail drive mechanism 21a and a second handrail drive mechanism 21b. . The first handrail drive shaft 19 is disposed above the second handrail drive shaft 20. The first handrail drive shaft 19 and the second handrail drive shaft 20 are rotatably supported inside the main frame 4. The two handrail sprockets 18 on the driving side are fixed so that the central axis is the same with respect to the upper sprocket 11 and the driving sprocket.

  As shown in FIG. 2, first intermediate sprockets 22 are fixed to portions near both ends of the first handrail drive shaft 19. Second intermediate sprockets 23 are fixed to portions near both ends of the second handrail drive shaft 20. The first handrail drive chain 24 is wound around the drive-side handrail sprocket 18 and the first and second intermediate sprockets 22 and 23 on the left and right sides.

  The first handrail drive mechanism 21a converts the rotational force of the first handrail drive shaft 19 into the movement force of the two movable handrails 7 and 8, and moves the upper portions of the two movable handrails 7 and 8, respectively. The first handrail drive mechanism 21a includes two left and right first outer sprockets 25 fixed to both ends of the first handrail drive shaft 19, and a plurality of first belt side sprockets 27 (see FIG. 1) and two second handrail drive chains 28 on the left and right. The first outer sprocket 25 is fixed to both ends of the first handrail drive shaft 19 on the side closer to the end than the first intermediate sprocket 22.

  The second handrail drive chain 28 is wound around the first outer sprocket 25 and the plurality of first belt-side sprockets 27 on the upper and lower sides. A first drive roller (not shown) is fixed to the first belt-side sprocket 27 so that the central axis is the same for each of the left and right sides. The first drive roller is disposed above the moving handrails 7 and 8. A first pressure roller 31 is disposed below the movable handrails 7 and 8, and the movable handrails 7 and 8 are sandwiched between the first pressure roller 31 and the first drive roller. As a result, the first handrail drive shaft 19 is rotationally driven by the electric motor 10, and the rotational force thereof is converted into the movement force of the two left and right movable handrails 7 and 8 by the first handrail drive mechanism 21a. The upper part of 7, 8 is moved.

  The second handrail drive mechanism 21b converts the rotational force of the second handrail drive shaft 20 into the movement force of the two movable handrails 7 and 8, and moves the lower portions of the two movable handrails 7 and 8, respectively. The second handrail drive mechanism 21b includes two left and right second outer sprockets 26 fixed to both ends of the second handrail drive shaft 20, and a plurality of second belt side sprockets 29 (see FIG. 1) and two third handrail drive chains 30 on the left and right. The second outer sprocket 26 is fixed to both ends of the second handrail drive shaft 20 on the side closer to the end than the second intermediate sprocket 23.

  The third handrail drive chain 30 is wound around the second outer sprocket 26 and the plurality of second belt side sprockets 29 on the upper and lower sides. A second drive roller (not shown) is fixed to the second belt-side sprocket 29 so that the central axis is the same for each of the left and right sides. The second drive roller is disposed above the moving handrails 7 and 8. A second pressure roller 32 is disposed below the movable handrails 7 and 8, and the movable handrails 7 and 8 are sandwiched between the second pressure roller 32 and the second drive roller. As a result, the second handrail drive shaft 20 is rotationally driven by the electric motor 10, and the rotational force is converted into the movement forces of the two left and right movable handrails 7 and 8 by the second handrail drive mechanism 21b. The lower part of 7, 8 is moved.

  In addition, bearing portions (not shown) are formed at both ends of the handrail drive shafts 19 and 20, and the flanges of the bearing portions are coupled to the fixing structure 5 of the escalator 1 with bolts and nuts (not shown).

  In such an escalator 1, in order to replace the handrail drive shafts 19 and 20 with the split-joint type handrail drive shaft 33 shown in FIG. 3, the existing handrail drive shafts 19 and 20 are cut at an intermediate portion and the escalator 1 is cut. Removal is performed from. In the embodiment, for this purpose, a handrail shaft cutting support structure 40 (FIGS. 1 and 4) described below is used. The structure of the handrail drive shaft 33 shown in FIG. 3 will be described later.

  FIG. 4 is a view of the escalator 1 viewed from one side in the left-right direction with a part omitted, and is a view showing a method of cutting the handrail drive shaft 19 using the handrail shaft cutting support structure 40 of the embodiment. FIG. 5A is a view taken in the direction of arrow B in FIG. 4 showing the upper fixing member 41. FIG. 5B is a view from the lower side to the upper side of FIG. 5A. FIG. 6 is an enlarged view of a portion C in FIG. 5B. FIG. 7 is a view showing a state in which a part of the cutting device engaging member 50 is suspended from the upper fixing member 41 with a part thereof omitted before the handrail drive shaft 19 is cut. The first handrail drive shaft 19 and the second handrail drive shaft 20 have the same basic structure, and the cutting method of the first handrail drive shaft 19 and the second handrail drive shaft 20 is the same. The case where the shaft 19 is cut will be described as a representative. Hereinafter, the first handrail drive shaft 19 may be referred to as a handrail drive shaft 19.

  The handrail shaft cutting support structure 40 includes an upper fixing member 41, a first connecting member 60 and a second connecting member 64, and a cutting device engaging member 50. As shown in FIGS. 5A and 5B, the upper fixing member 41 is a portion of the two movable handrails 7 and 8 that is located above the handrail drive shaft 19 (FIG. 4), for example, substantially directly above the handrail drive shaft 19. It is a long member that is fixed over the upper surface. For example, the upper fixing member 41 includes a long main body portion 42 that spans the upper surfaces of the two movable handrails 7 and 8, and two plate members 45 that are fixed to both ends of the main body portion 42.

  The main body portion 42 of the upper fixing member 41 includes a long rectangular bottom plate portion 43 and two rectangular side plate portions 44 erected at both ends in the width direction (vertical direction in FIG. 5A) of the bottom plate portion 43. It is a rail shape formed by bending at an approximately right angle in a direction in which the upper end portions of the side plate portions 44 face each other. The upper fixing member 41 has the same cross-sectional shape along the longitudinal direction, and fits the ends of two rail elements 41a and 41b having different lengths in the longitudinal direction, and connects them with bolts 41c and nuts. It is formed long. Thus, as will be described later, the handrail shaft cutting support structure 40 can be applied to two types of escalators 1 in which the distance between the left and right movable handrails 7 and 8 is different. The main body portion 42 of the upper fixing member 41 is formed of a metal plate such as iron.

  Of the two side plate portions 44 of the upper fixing member 41, an eyebolt 41d having a circular portion at the tip is coupled to a substantially central position in the longitudinal direction outside the at least one side plate portion 44.

  Further, the upper fixing member 41 includes a rubber material 46 that is fixed to each of two positions that are separated from each other in the longitudinal direction of the lower surface and pressed against the upper surfaces of the two moving handrails 7 and 8. Specifically, the two plate members 45 of the upper fixing member 41 are fixed to both end portions that are two positions apart in the longitudinal direction of the lower surface of the main body portion 42 and intersect the main body portion 42 at a substantially right angle. Has been stretched. Further, in the main body plate portion 47 constituting each of the two plate members 45, a rubber material 46 is fixed to a portion in contact with the upper surfaces of the movable handrails 7 and 8.

  Specifically, the plate member 45 is a thin plate shape that continuously covers a long main body plate portion 47 made of wood or the like, and both end surfaces and a lower surface of the main body plate portion 47 in the width direction (left-right direction in FIG. 6). Rubber material 46 and metal outer plate portions 48 disposed at both ends in the width direction of the plate member 45. The outer side plate part 48 is fixed to the side surface in the width direction of the main body plate part 47 by a coupling means 49 such as a wood screw penetrating the outer side plate part 48 and the rubber material 46. Thereby, the rubber material 46 is fixed to the main body plate portion 47.

  In such an upper fixing member 41, left and right plate members 45 are arranged on the inclined upper side surfaces of the left and right moving handrails 7, 8, and further, a rope or the like coupled to the main body 42 of the upper fixing member 41 is pulled. It is fixed to the fixed part of the escalator 1 by the member 70 (FIG. 4). For example, the pulling member 70 is a rope having an upper ring portion (not shown) formed at one end. As shown in FIG. 4, the main body portion 42 of the upper fixing member 41 is inserted into the upper ring portion of the pulling member 70, and the other end of the pulling member 70 is annularly connected to one step shaft 15 of the escalator 1 in a stopped state. It couple | bonds with the lower side coupling | bond part 70a. The step shaft 15 corresponds to a fixed portion of the escalator 1. Accordingly, the upper fixing member 41 is fixed to the upper surfaces of the two movable handrails 7 and 8 by pulling a part of the longitudinal direction from the fixing portion of the escalator 1 in an oblique direction with respect to the vertical direction. The upper fixing member 41 may be fixed to the upper surface of each of the two moving handrails 7 and 8 by pulling a plurality of positions in the longitudinal direction obliquely with respect to the vertical direction from the fixing portion of the escalator 1.

  Further, when the rubber material 46 of the upper fixing member 41 is pressed against the moving handrails 7 and 8, the upper fixing member 41 is also moved by the friction force acting between the rubber material 46 and the moving handrails 7 and 8. , 8 is difficult to move.

  As shown in FIG. 7, the first connecting member 60 has a first position in the longitudinal direction of the upper fixing member 41 and a right position in FIG. 7 that is a first position in the axial direction of the handrail drive shaft 19. It is connected in a state of pulling to the position. The first connecting member 60 includes a metal first ring 61 and a second ring 62 and a chain block 63. The main body 42 of the upper fixing member 41 is inserted inside the first ring 61. The handrail drive shaft 19 is inserted into the second ring 62 inside. The chain block 63 is connected to the two rings 61 and 62. In FIG. 4, the illustration of the first connecting member 60 is omitted.

  The second connecting member 64 is pulled to the left position in FIG. 7 that is the second position in the longitudinal direction of the upper fixing member 41 and the left position in FIG. 7 that is the second position in the axial direction of the handrail drive shaft 19. Connected with The second position in the longitudinal direction of the upper fixing member 41 is a position on the upper fixing member 41 opposite to the first position in the longitudinal direction with respect to a cutting device engaging member 50 described later. The second position in the axial direction of the handrail drive shaft 19 is a position on the handrail drive shaft 19 opposite to the first position in the axial direction with respect to a cutting device engaging member 50 described later. The second connecting member 64 is formed by a ring-shaped rope that is stretched between the main body portion 42 of the upper fixing member 41 and the handrail drive shaft 19.

  In addition, the 2nd connection member may be formed including the chain block with the 1st connection member 60 instead of the 1st connection member 60. FIG. As described above, since at least one of the first connecting member and the second connecting member is formed to include the chain block, it is easy to adjust the tension of the member including the chain block. Moreover, both the 1st connection member and the 2nd connection member may be formed with a ring-shaped rope.

  The cutting device engaging member 50 includes a turnbuckle 51, a chain 52 engaged with the lower end of the turnbuckle 51, an annular member 53 coupled to the lower end of the chain 52, and a cutting support portion 58. The turnbuckle 51 has an upper end engaged with an eyebolt 41 d screwed to the upper fixing member 41 and a lower end engaged with an upper end of the chain 52.

  The annular member 53 is formed in an annular shape by coupling both ends of the rope 55 to both ends of the intermediate coupling member 54. The intermediate coupling member 54 has two plate portions 54a facing each other in parallel, and both ends and an intermediate portion of the two plate portions 54a are connected by bolts 54b and nuts (not shown). The lower end of the chain 52 is coupled to the periphery of the bolt 54b at an intermediate portion between the two plate portions 54a. The rope 55 is formed in a U shape as a whole, and ring portions 56 are formed at both ends. Moreover, the ring part 56 formed in the upper end part of the rope 55 is couple | bonded around the volt | bolt 54b in the both ends of the two board parts 54a. Thereby, the annular member 53 is coupled to the upper fixing member 41. In addition, the annular member 53 has a U-shaped portion of the rope 55 formed at the lower end in a state where it hangs down.

  Further, the cutting support 58 is formed by a chain in which a plurality of oval chain elements 59 are connected. The cutting support portion 58 is connected so as to span the first portion 53a and the second portion 53b, which are both side portions, with the lower end (the position indicated by the point P in FIG. 7) of the annular member 53 as a boundary. The first portion 53a and the second portion 53b are inserted inside the two chain elements 59 at both ends of the cutting support portion 58, respectively. Thereby, the both side parts of the cutting | disconnection support part 58 can each move along a longitudinal direction with respect to the 1st part 53a and the 2nd part 53b. As a result, as will be described later with reference to FIG. 8, it is easy to sandwich the gripping portion 81 of the cutting device 80, and it is possible to engage with cutting devices 80 of various sizes. A relatively small annular insertion portion Q is formed by a portion surrounded by the U-shaped portion of the annular member 53 and the cutting support portion 58.

  FIG. 8 is a view corresponding to FIG. 7 showing a state immediately before the handrail drive shaft 19 is cut by engaging the cutting device 80 with the cutting device engaging member 50. As shown in FIGS. 7 and 8, in the cutting device engaging member 50, a state in which the U-shaped portion at the lower end portion of the annular member 53 is passed below the handrail drive shaft 19 and bent upward is considered. In this state, the gripping portion 81 of the cutting device 80 can be inserted inside the insertion portion Q formed by the U-shaped portion of the annular member 53 and the cutting support portion 58. The cutting device 80 is an electric saw called a saver saw or a reciprocating saw, and a blade portion 82 is formed at the tip of a gripping portion 81 that can be held by an operator. When the switch (not shown) is turned on, the cutting device 80 reciprocates the blade portion 82 to cut the object to be cut.

  The handrail shaft cutting method for cutting the handrail drive shaft 19 using the handrail shaft cutting support structure 40 includes the following first to fifth steps. As a first step, the first handrail drive chain 24 spanned on the first intermediate sprocket 22 of the handrail drive shaft 19 and the second handrail drive chain 28 spanned on the first outer sprocket 25 are cut to each chain. The ends of 24 and 28 are fixed or engaged with the fixing structure 5. At this time, the ends of the chains 24 and 28 can be fixed or engaged with the fixing structure 5 by a wire or a ring member. Then, as a second step, the upper fixing member 41 is stretched over the upper surfaces of the two left and right moving handrails 7 and 8 and fixed. Next, as a third step, the first connecting member 60 is connected to the first position in the longitudinal direction of the upper fixing member 41 and the first position in the axial direction of the handrail drive shaft 19 in a state of being pulled together. At the same time, the second connecting member 64 is connected to the second position in the longitudinal direction of the upper fixing member 41 and the second position in the axial direction of the handrail drive shaft 19 in a state of being pulled. Then, as a fourth step, the U-shaped portion of the annular member 53 forming the cutting device engaging member 50 is passed below the handrail drive shaft 19 and bent upward, and the cutting device 80 is inserted inside the insertion portion Q. The grip part 81 is inserted, and the grip part 81 is engaged with the cutting support part 58. Further, as a fifth step, the blade portion 82 of the cutting device 80 is pressed against the handrail drive shaft 19 to cut the substantially central portion of the handrail drive shaft 19.

  As shown in FIG. 8, in a state where the gripping portion 81 of the cutting device 80 is inserted inside the insertion portion Q and the gripping portion 81 is pressed and engaged with the upper side of the cutting support portion 58, the cutting device 80. It is possible to press the blade portion 82 against the handrail drive shaft 19. At this time, the intermediate portion of the gripping portion 81 of the cutting device 80 is clamped by being sandwiched between the U-shaped portion and the cutting support portion 58 from both sides in the vertical direction. At this time, since the operator has the lower end portion of the gripping portion 81, the blade portion 82 side of the cutting device 80 is lowered according to the principle of the lever, so that the force for supporting the gripping portion 81 by the operator is small.

  During and after cutting the handrail drive shaft 19, both sides of the cut portion of the handrail drive shaft 19 are suspended by the upper fixing member 41, so that both side portions thereof are directed downward toward the cut portion. Inclination is suppressed. Thereby, the blade part 82 of the cutting device 80 is not inclined and strongly pressed at both side portions of the handrail drive shaft 19, and it is possible to suppress the cutting device 80 from being heated by frictional heat. Further, in order to prevent the both side portions of the handrail drive shaft 19 from being inclined, it is not necessary for the operator to lift the handrail drive shaft 19 by hand during cutting. As a result, the number of workers required for cutting the handrail drive shaft 19 can be reduced, and the burden on the workers can be reduced. Further, it is not necessary for the operator to hold the cutting device 80 with a great force continuously for a long time during the cutting operation, and the burden on the operator can be reduced also from this aspect.

  The upper fixing member 41 is formed in a long shape by fitting the ends of the two rail elements 41a and 41b and connecting them with bolts 41c and nuts. Thus, when the distance between the two left and right movable handrails 7 and 8 is small, the plate member 45 is coupled to the lower surfaces of both end portions of one rail element 41a to form the upper fixing member. When the distance between the left and right moving handrails 7 and 8 is large, the two rail elements 41a and 41b are coupled as shown in FIGS. 5A and 5B to increase the longitudinal dimension of the upper fixing member 41. Thereby, the handrail shaft cutting support structure 40 can be applied to two types of escalators in which the distance between the moving handrails 7 and 8 is different.

  After the cutting operation of the handrail drive shaft 19 is completed as described above, a coupling portion between a bearing portion (not shown) provided at the end of the handrail drive shaft 19 and the fixing structure of the escalator 1 is removed. Then, the first connecting member 60 or the second connecting member 64 is removed from the upper fixing member 41 and the handrail drive shaft 19, and the both side portions of the handrail drive shaft 19 after cutting are carried out from the inside of the main frame 4. At this time, since the handrail drive shaft 19 after cutting is relatively short and light, it can be easily carried by one operator.

  Then, the split coupling type handrail drive shaft 33 shown in FIG. 3 is carried into the main frame 4. First, the handrail drive shaft 33 will be described with reference to FIG. The handrail drive shaft 33 is formed by connecting two divided main shafts 34 and 35 in the longitudinal direction. The facing side end of each of the divided main shafts 34 and 35 is an inner end, and the end opposite to the facing end is an outer end. At this time, the first intermediate sprocket 36 and the first outer sprocket 37 are fixed to the outer end portions of the divided main shafts 34 and 35, and a bearing portion 38 is formed between the two sprockets 36 and 37. Further, coupling flanges 39a and 39b are formed at the inner ends of the divided main shafts 34 and 35, respectively.

  The split coupling type handrail drive shaft 33 is divided into two split main shafts 34 and 35, and carries one of the two split main shafts 34 and 35 into the main frame 4. Thereafter, the bearing portion 38 of one of the divided main shafts 34 and 35 is coupled to a part of the fixing structure 5 of the escalator 1. At this time, a belt (not shown) is stretched over one of the divided main shafts 34 and 35 and the fixed structure 5 to reduce the force for supporting the one divided main shaft 34 and 35 by the operator. Further, the other of the two divided main shafts 34 and 35 is fixed to the fixing structure 5 in the same manner as the other. After the bearing portions 38 of the two divided main shafts 34 and 35 are coupled to the fixed structure 5, the flanges 39a and 39b at the inner ends of the divided main shafts 34 and 35 are abutted. Then, by connecting the flanges 39a and 39b with bolts and nuts, the split handrail drive shaft 33 is formed. As a result, the handrail drive shaft 19 is replaced with a split-coupled handrail drive shaft 33. Further, the cutting portion is connected in a state where the first handrail drive chain 24 (FIG. 1) is stretched over the first intermediate sprocket 36 of the handrail drive shaft 33 to adjust the tension of the first handrail drive chain 24. Further, the cutting portion is connected in a state where the second handrail drive chain 28 (FIG. 1) is stretched over the first outer sprocket 37, and the tension of the second handrail drive chain 28 is adjusted.

  Thus, by exchanging the handrail drive shaft to the split coupling type, it is possible to facilitate the work for the operator to replace the handrail drive shaft 33 with another handrail drive shaft thereafter.

  Although the case where the 1st connection member 60 and the 2nd connection member 64 are connected with the upper side fixing member 41 and the handrail drive shaft 19 was demonstrated above, only one of the 1st connection member 60 and the 2nd connection member 64 is connected. May be. On the other hand, from the viewpoint of facilitating the cutting operation, it is preferable to use both the first connecting member 60 and the second connecting member 64 as in the configuration of FIGS.

  FIG. 9 is a view corresponding to FIG. 5A, showing another example of the upper fixing member 41. FIG. 10 is a view as seen from the lower side to the upper side of FIG. 9 and 10, two plate-like rubber members 46 a are fixed to both ends of the upper fixing member 41 at two positions that are separated from each other in the longitudinal direction of the lower surface of the main body 42. Each rubber material 46a is pressed against the upper surface of each of the two moving handrails 7 and 8 (FIG. 4). Even with such a configuration, the upper fixing member 41 can be fixed so as to span the two movable handrails 7 and 8. Other configurations and operations are the same as those in FIGS. 1 to 8.

  DESCRIPTION OF SYMBOLS 1 Escalator, 2,3 boarding gate, 4 main frame, 5 fixed structure, 6 balustrade part, 7, 8 moving handrail, 9 transfer means, 10 electric motor, 11 upper sprocket, 12 lower sprocket, 13 drive chain, 14 step chain , 15 Step shaft, 16 User, 18 Drive-side handrail sprocket, 19 First handrail drive shaft, 20 Second handrail drive shaft, 21a First handrail drive mechanism, 21b Second handrail drive mechanism, 22 First intermediate sprocket, 23 Second intermediate sprocket, 24 First handrail drive chain, 25 First outer sprocket, 26 Second outer sprocket, 27 First belt side sprocket, 28 Second handrail drive chain, 29 Second belt side sprocket, 30 Third handrail drive Chain, 31 1st pressure roller, 32 2nd pressure roller, 3 Handrail drive shaft, 34, 35 Split main shaft, 36, 37 Sprocket, 38 Bearing part, 39a, 39b Flange, 40 Handrail shaft cutting support structure, 41 Upper fixing member, 41a, 41b Rail element, 41c bolt, 41d Eye bolt, 42 Main body Part, 43 bottom plate part, 44 side plate part, 45 plate member, 46, 46a rubber material, 47 main body plate part, 48 outer plate part, 49 coupling means, 50 cutting device engaging member, 51 turnbuckle, 52 chain, 53 annular Member, 53a first part, 53b second part, 54 intermediate coupling member, 54a plate part, 54b bolt, 55 rope, 56 ring part, 58 cutting support part, 59 chain element, 60 first connecting member, 61 first ring 62 Second ring 63 Chain block 64 Second connecting member 70 Tensile part Material, 70a lower joint part, 80 cutting device, 81 gripping part, 82 blade part.

Claims (8)

A main frame arranged so as to span between a pair of entrances, two left and right moving handrails arranged so as to be able to circulate between the pair of entrances, and a handrail rotatably supported in the main frame A handrail shaft for cutting the handrail drive shaft of an escalator comprising: a drive shaft; A support structure,
A long upper fixing member that is fixed over the upper surface of the two movable handrails;
A first coupling member coupled in a state of being pulled to a first longitudinal position of the upper fixing member and an axial first position of the handrail drive shaft;
An annular member coupled to the upper fixing member, and a cutting device engaging member including a cutting support portion that is spanned and coupled to both sides with the lower end of the annular member as a boundary,
The cutting device engaging member is
A U-shaped portion formed at the lower end portion of the annular member is passed below the handrail drive shaft and bent upward, and an insertion portion formed by being surrounded by the U-shaped portion and the cutting support portion. A handrail shaft cutting support structure capable of pressing a blade portion of the cutting device against the handrail drive shaft in a state where a gripping portion of a cutting device is inserted inside and the gripping portion is engaged with the cutting support portion. The handrail shaft cutting support structure according to claim 1,
The handrail shaft cutting support structure, wherein both side portions of the cutting support portion are movable along the longitudinal direction with respect to each of both side portions of the annular member. In the handrail shaft cutting support structure according to claim 1 or 2,
The upper fixing member is fixed to the upper surface of each of the two movable handrails by pulling a part or a plurality of positions in the longitudinal direction from the fixed part of the escalator in an oblique direction with respect to the vertical direction. Construction. The handrail shaft cutting support structure according to any one of claims 1 to 3,
In the upper fixing member, in the longitudinal second position opposite to the first longitudinal position with respect to the cutting device engaging member, and in the handrail drive shaft, the axial direction relative to the cutting device engaging member. A handrail shaft cutting support structure comprising: a second connecting member connected in a state of being pulled to an axial second position opposite to the first position. The handrail shaft cutting support structure according to claim 4,
A handrail shaft cutting support structure, wherein at least one of the first connecting member and the second connecting member is formed to include a chain block. The handrail shaft cutting support structure according to any one of claims 1 to 5,
The handrail shaft cutting support structure, wherein the upper fixing member includes two rubber members fixed to each of two positions pressed against the upper surface of the two moving handrails in the longitudinal direction of the lower surface. The handrail shaft cutting support structure according to claim 6,
The upper fixing member is fixed at two positions that are separated from each other in a longitudinal direction on the lower surface of the main body portion and a long main body portion stretched over the upper surfaces of the two moving handrails, and intersects the main body portion. Two plate members stretched in the direction,
The handrail shaft cutting support structure, wherein the two rubber members are fixed to a portion of the main body plate portion that constitutes each of the two plate members in contact with the upper surface of the movable handrail. A handrail shaft cutting method for cutting a handrail drive shaft of an escalator using the handrail shaft cutting support structure according to claim 1,
Spanning and fixing the upper fixing member over the upper surfaces of the two moving handrails;
Connecting the first connecting member to the first position in the longitudinal direction of the upper fixing member and the first position in the axial direction of the handrail drive shaft in a state of pulling;
The U-shaped part is passed below the handrail drive shaft and bent upward, and the gripping part of the cutting device is inserted inside the insertion part, and the gripping part is engaged with the cutting support part. Step to
A method of cutting a handrail shaft, comprising the step of pressing the blade portion of the cutting device against the handrail drive shaft and cutting the handrail drive shaft.

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