JP6656056B2 - Escalator handrail shaft cutting support structure and handrail shaft cutting method - Google Patents

Description

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

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

  Patent Literature 1 describes a method of replacing a handrail drive shaft. In this replacement method, first, a power transmission chain and a handrail drive chain are removed from 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 member fixed to the main frame of the escalator, and the handrail drive shaft is removed. Thereafter, a replacement handrail drive shaft is newly attached to a predetermined position. Next, a power transmission chain and a handrail drive chain are wound around sprockets near both ends of the handrail drive shaft.

JP 2011-219206 A

  In the method of replacing a handrail drive shaft as described in Patent Document 1, the weight and length of the handrail drive shaft are large, so that the work of taking in and out the handrail drive shaft arranged in a small space requires time and effort. 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-coupled handrail drive shaft is formed by combining two short split main shafts in the longitudinal direction. Then, in order to replace the existing handrail drive shaft with the split coupling type, it is conceivable to cut the existing handrail drive shaft at an intermediate portion and remove it. Thus, there is a possibility that the existing handrail drive shaft can be easily taken out.

  However, when cutting the handrail drive shaft, if the supporting force on both sides of the cutting portion is small, both sides after cutting and after cutting are inclined so that the cutting portion is downward, and the blade of the cutting device is cut on both sides. It is strongly pinched. For this purpose, it is conceivable that an operator lifts both sides by hand, but in that case, many operators are required and work is required. In addition, 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 work of cutting the handrail drive shaft and reduce the burden on the workers.

  The handrail shaft cutting support structure of the escalator according to the present invention includes a main frame arranged so as to bridge between a pair of entrances and exits, and two left and right handrails arranged so as to be able to circulate between the pair of entrances and exits. A handrail drive shaft rotatably supported in the main frame, and a handrail drive mechanism for converting a rotational force of the handrail drive shaft into a moving force of the two moving handrails and moving the two moving handrails. A handrail shaft support structure for cutting the handrail drive shaft of an escalator, comprising: a long upper fixing member that is fixed across the upper surface of the two moving handrails; A first connecting member connected in a state of being pulled to a position and an axial first position 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. In the cutting device engaging member, a U-shaped portion formed at a lower end portion of the annular member is passed below a handrail drive shaft and bent upward, and the U-shaped portion and the cutting support portion are bent. The grip portion of the cutting device is inserted inside the insertion portion formed by being surrounded by, and the blade portion of the cutting device is pressed against the handrail drive shaft in a state where the grip portion is engaged with the cutting support portion. It is possible.

  The method for cutting the handrail shaft of the escalator according to the present invention is a method for cutting the handrail drive shaft of the escalator using the handrail shaft cutting support structure according to the present invention, wherein the upper side of the two moving handrails has the upper side. Spanning and fixing a fixing member; and connecting the first connecting member to the first longitudinal position of the upper fixing member and the first axial position of the handrail drive shaft while pulling the first connecting member. Passing the U-shaped portion below the handrail drive shaft and bending it upward, and inserting the grip portion of the cutting device inside the insertion portion to engage the grip portion with the cutting support portion. Matching and pressing the blade portion of the cutting device against the handrail drive shaft to cut the handrail drive shaft.

  ADVANTAGE OF THE INVENTION According to the handrail shaft cutting support structure and the 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 which uses the handrail shaft cutting support structure of embodiment of this invention. FIG. 2 is a view on arrow A in FIG. 1 in a state where a step is removed. It is a figure which shows the handrail drive shaft of a division coupling type. It is the figure which looked at the escalator from one side in the left-right direction with a part omitted, and is a figure showing the method of cutting a handrail drive shaft using the handrail shaft cutting support structure of an embodiment. FIG. 5 is a view on arrow B in FIG. 4 showing the upper fixing member. It is the figure seen from the lower side of Drawing 5A to the upper part. It is the C section enlarged view of FIG. 5B. FIG. 7 is a view showing a state in which a cutting device engaging member is suspended from an upper fixing member in a state before cutting a handrail drive shaft, with a part thereof being omitted. FIG. 8 is a view corresponding to FIG. 7, showing a state immediately before cutting the handrail drive shaft 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 side fixing member. It is the figure seen from the lower side of FIG. 9 to the upper side.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The materials, shapes, numbers, parts arrangements, and the like described below are examples for explanation, and can be changed according to the specifications of the handrail shaft cutting support structure. Hereinafter, the same components will be described with the same reference numerals.

  FIG. 1 is a schematic diagram of an escalator 1 using a handrail shaft cutting support structure 40 according to the embodiment. FIG. 2 is a view on arrow A of FIG. 1 in a state where a step (not shown) is removed. The escalator 1 includes a fixed structure 5 including a main frame 4 disposed so as to bridge between a pair of entrances 2 and 3 provided on upper and lower floors, a plurality of steps (not shown), and left and right. It has two balustrades 6, and two belt-like moving handrails 7 and 8 on the left and right. The two balustrades 6 are erected on the upper side of the fixed structure 5 on both left and right sides of the plurality of steps. The fixing structure 5 is a structural part that supports other members, and forms a basic part of the escalator 1. In addition, in this specification, "left-right direction" means the left-right direction when the escalator 1 is viewed from the lower entrance 3 to the upper entrance 2.

  The plurality of steps are capable of getting on and off the passenger, are supported by the fixed structure 5 so as to be capable of circulating, 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 arranged on the upper floor side of the main frame 4. The drive sprocket is arranged on the upper floor side of the main frame 4. The torque of the electric motor 10 is transmitted to the drive sprocket via the drive chain 13. The upper sprocket 11 is fixed to the driving sprocket so that the center axis is the same. The lower sprocket 12 is arranged 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 steps shafts 15 are connected by a step chain 14. Thus, the plurality of steps move in a circular manner by driving the electric motor 10.

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

  Two moving handrails 7, 8 are supported around each of the two balustrades 6. Each of the moving handrails 7 and 8 is provided for the user 16 on the steps to stabilize the body by grasping with his / her hand. The moving handrails 7, 8 are formed endlessly, 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. You. Thus, the two handrails 7 and 8 are arranged between the pair of entrances 2 and 3 so as to be able to circulate.

  Specifically, the escalator 1 includes left and right two drive-side handrail sprockets 18, a first handrail drive shaft 19 and a second handrail drive shaft 20, 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 drive-side handrail sprockets 18 are fixed to the upper sprocket 11 and the drive sprocket so that their central axes are the same.

  As shown in FIG. 2, a first intermediate sprocket 22 is fixed to a portion near both ends of the first handrail drive shaft 19. A second intermediate sprocket 23 is fixed to a portion near both ends of the second handrail drive shaft 20. A 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 each of the left and right sides.

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

  On each of the left and right sides, the second handrail drive chain 28 is wound around the first outer sprocket 25 and the upper plurality of first belt-side sprockets 27. A first drive roller (not shown) is fixed to the first belt-side sprocket 27 on each of the left and right sides so that the center axis is the same. The first drive roller is arranged above the moving handrails 7 and 8. A first pressing roller 31 is disposed below the moving handrails 7 and 8, and the moving handrails 7 and 8 are sandwiched between the first pressing roller 31 and the first driving roller. Thus, the first handrail drive shaft 19 is rotationally driven by the electric motor 10, and its rotating force is converted by the first handrail drive mechanism 21 a into the moving force of the two left and right handrails 7 and 8, and the two handrails are moved. 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 moving force of the two moving handrails 7 and 8, and moves the lower portions of the two moving 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 (FIG. 1) and two left and right third handrail drive chains 30. The second outer sprocket 26 is fixed at both ends of the second handrail drive shaft 20 on a side closer to the end than the second intermediate sprocket 23.

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

  Further, 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 connected to the fixing structure 5 of the escalator 1 with bolts and nuts (not shown).

  In such an escalator 1, in order to replace each of the handrail drive shafts 19 and 20 with a split and combined type handrail drive shaft 33 shown in FIG. Removal from the device is performed. 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 in which the escalator 1 is viewed from one side in the left-right direction with a part omitted, and is a view illustrating 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 on arrow B in FIG. 4, showing the upper fixing member 41. FIG. 5B is a diagram viewed from the lower side of FIG. 5A to the upper side. FIG. 6 is an enlarged view of a portion C in FIG. 5B. FIG. 7 is a diagram illustrating a state in which the cutting device engagement member 50 is suspended from the upper fixing member 41 in a state 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. A 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 in some cases.

  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 FIG. 5A and FIG. 5B, the upper fixing member 41 is located above the handrail drive shaft 19 (FIG. 4), for example, at a portion located almost directly above the handrail drive shaft 19 in the two moving handrails 7 and 8. 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 is bridged over the upper surfaces of the two moving 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, Each of the side plate portions 44 has a rail shape formed by bending at an approximately right angle in a direction in which the upper end portions face each other. The upper fixing member 41 has a similar cross-sectional shape along the longitudinal direction, is fitted with ends of two rail elements 41a and 41b having different longitudinal lengths, and is connected by bolts 41c and nuts. It is formed long. Thus, as described later, the handrail shaft cutting support structure 40 can be applied to two types of escalators 1 in which the distance between the two left and right moving handrails 7 and 8 is different. The main body 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 a distal end portion is coupled to a substantially central position in the longitudinal direction outside at least one of the side plate portions 44.

  The upper fixing member 41 includes rubber members 46 fixed at two positions pressed against the upper surfaces of the two handrails 7 and 8 apart from each other in the longitudinal direction of the lower surface. Specifically, the two plate members 45 of the upper fixing member 41 are fixed to both ends, which are two positions separated in the longitudinal direction of the lower surface of the main body 42, in a direction intersecting the main body 42 at a substantially right angle. Stretched. In a main body plate portion 47 constituting each of the two plate members 45, a rubber material 46 is fixed to a portion that comes into contact with the upper surfaces of the moving handrails 7 and 8.

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

  Such an upper fixing member 41 has left and right plate members 45 arranged on the inclined upper side surfaces of the left and right moving handrails 7 and 8, and further pulls a rope or the like coupled to the main body 42 of the upper fixing member 41. It is fixed to the fixed portion of the escalator 1 by the member 70 (FIG. 4). For example, the tension member 70 is a rope having an upper ring portion (not shown) formed at one end. As shown in FIG. 4, in a state where the main body portion 42 of the upper fixing member 41 is inserted into the upper ring portion of the pulling member 70, the other end of the pulling member 70 is looped around one step shaft 15 of the escalator 1 in a stopped state. At the lower connecting portion 70a. The step shaft 15 corresponds to a fixed portion of the escalator 1. Thus, the upper fixing member 41 is fixed to the upper surfaces of the two moving handrails 7 and 8 by partially pulling the upper fixing member 41 in the longitudinal direction obliquely from the fixing portion of the escalator 1 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 from the fixing portion of the escalator 1 with respect to the vertical direction.

  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 frictional force acting between the rubber material 46 and the moving handrails 7 and 8. , 8 are less likely to shift.

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

  The second connecting member 64 is pulled to a left side position in FIG. 7 that is a second position in the longitudinal direction of the upper fixing member 41 and a left side position in FIG. 7 that is a second position in the axial direction of the handrail drive shaft 19. Are linked by 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 bridged between the main body 42 of the upper fixing member 41 and the handrail drive shaft 19.

  In addition, the 2nd connection member may be formed including a chain block with the 1st connection member 60 or instead of the 1st connection member 60. As described above, at least one of the first connecting member and the second connecting member is formed including the chain block, so that the operation of adjusting the tension of the member including the chain block is easy. Further, both the first connecting member and the second connecting member may be formed by a ring-shaped rope.

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

  The annular member 53 is formed in an annular shape by connecting both ends of the rope 55 to both ends of the intermediate connecting member 54. The intermediate connecting member 54 has the two plate portions 54a facing each other in parallel, and both ends and a middle portion of the two plate portions 54a are connected by bolts 54b and nuts (not shown). Then, the lower end of the chain 52 is connected 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. Further, at both ends of the two plate portions 54a, a ring portion 56 formed at an upper end portion of the rope 55 is joined around the bolt 54b. Thereby, the annular member 53 is connected to the upper fixing member 41. Further, the U-shaped portion of the rope 55 is formed at the lower end of the annular member 53 in a hanging state.

  Further, the cutting support 58 is formed by a chain to 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 respectively inserted inside the two chain elements 59 at both ends of the cutting support portion 58. Accordingly, both side portions of the cutting support portion 58 can move along the longitudinal direction with respect to the first portion 53a and the second portion 53b, respectively. Thereby, as will be described later with reference to FIG. 8, it is easy to sandwich the grip portion 81 of the cutting device 80, and it is possible to engage with the cutting device 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 diagram 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, consider a state in which the U-shaped portion at the lower end of the annular member 53 is passed below the handrail drive shaft 19 and bent upward in the cutting device engaging member 50. In this state, the grip 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 a tip of a grip portion 81 that can be held by an operator. When a switch (not shown) is turned on, the cutting device 80 causes the blade portion 82 to reciprocate and 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 bridged over the first intermediate sprocket 22 of the handrail drive shaft 19 and the second handrail drive chain 28 bridged over the first outer sprocket 25 are cut and each chain is cut. The ends of 24, 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 with a wire or a ring member. Then, as a second step, the upper fixing member 41 is fixed over the upper surfaces of the two left and right handrails 7, 8. 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 while being pulled. At the same time, the second connecting member 64 is connected to the second longitudinal position of the upper fixing member 41 and the second axial position of the handrail drive shaft 19 while being pulled. As a fourth step, the U-shaped portion of the annular member 53 forming the cutting device engaging member 50 is passed under the handrail drive shaft 19 and bent upward, and the cutting device 80 is inserted inside the insertion portion Q. Then, the grip 81 is engaged with the cutting support 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 a substantially central portion of the handrail drive shaft 19.

  As shown in FIG. 8, in a state where the grip portion 81 of the cutting device 80 is inserted inside the insertion portion Q and the grip portion 81 is pressed and engaged above the cutting support portion 58, the cutting device 80 Can be pressed against the handrail drive shaft 19. At this time, the middle part of the grip part 81 of the cutting device 80 is clamped between the U-shaped part and the cutting support part 58 from both sides in the vertical direction. At this time, since the operator holds the lower end of the grip portion 81, the blade portion 82 side of the cutting device 80 is lowered by the principle of leverage, so that the force for supporting the grip portion 81 by the operator is small.

  During and after the cutting of 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, and both side portions thereof are directed downward toward the cut portion. Tilt is suppressed. Accordingly, the blade portions 82 of the cutting device 80 are not inclined and strongly pressed at both side portions of the handrail drive shaft 19, and it is possible to suppress the heating of the cutting device 80 due to frictional heat. Further, in order to prevent the both sides of the handrail drive shaft 19 from being inclined, it is not necessary for the operator to manually lift the handrail drive shaft 19 during cutting. Thus, 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 large force continuously for a long time during the cutting operation, and the burden on the operator can be reduced from this aspect as well.

  The upper fixing member 41 is formed to be long 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 handrails 7 and 8 is small, the plate member 45 is connected to the lower surfaces of both ends of one rail element 41a to form an upper fixed member. When the distance between the left and right moving handrails 7 and 8 is large, the two rail elements 41a and 41b are connected as shown in FIGS. 5A and 5B to increase the longitudinal dimension of the upper fixing member 41. Thus, 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, the joint between the 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 detached from the upper fixing member 41 and the handrail drive shaft 19, and each of both side portions of the handrail drive shaft 19 after cutting is carried out from the inside of the main frame 4. At this time, the handrail drive shaft 19 after cutting is relatively short and light, so that it can be easily carried by one worker.

  Then, the split-coupled 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 end of each of the split spindles 34 and 35 is defined as an inner end, and the end opposite to the facing end is defined as an outer end. At this time, the first intermediate sprocket 36 and the first outer sprocket 37 are fixed to the outer end of each of the divided main shafts 34, 35, and a bearing 38 is formed between the two sprockets 36, 37. In addition, connecting flanges 39a and 39b are formed at the inner ends of the divided main shafts 34 and 35, respectively.

  The split-coupled handrail drive shaft 33 carries one of the two divided main shafts 34 and 35 into the main frame 4 in a state of being divided into two divided main shafts 34 and 35. After that, the bearing portion 38 of one of the divided main shafts 34 and 35 is connected to a part of the fixed 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 fixing structure 5, so that the force for supporting the one of the divided main shafts 34 and 35 by the operator can be reduced. Also, the other of the two divided main shafts 34 and 35 is fixed to the fixing structure 5 in the same manner as one. After the bearing portions 38 of the two split spindles 34, 35 are connected to the fixed structure 5, the flanges 39a, 39b at the inner ends of the split spindles 34, 35 are abutted. Then, by coupling the respective flanges 39a and 39b with bolts and nuts, a split coupling type handrail drive shaft 33 is formed. As a result, the handrail drive shaft 19 is replaced with the split-coupled handrail drive shaft 33. In addition, the cutting portion is connected with the first handrail drive chain 24 (FIG. 1) suspended 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 with the second handrail drive chain 28 (FIG. 1) stretched over the first outer sprocket 37 to adjust the tension of the second handrail drive chain 28.

  By thus replacing the handrail drive shaft with the split coupling type, it is possible to facilitate the operation of subsequently replacing the handrail drive shaft 33 with another handrail drive shaft.

  Although the case where the first connection member 60 and the second connection member 64 are connected to the upper fixing member 41 and the handrail drive shaft 19 has been described above, only one of the first connection member 60 and the second connection member 64 is connected. May be done. 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 showing another example of the upper fixing member 41 and corresponding to FIG. 5A. FIG. 10 is a diagram viewed from the lower side of FIG. 9 to the upper side. In the configuration of FIGS. 9 and 10, two plate-shaped rubber members 46 a are respectively fixed to both ends of the lower surface of the main body 42 of the upper fixing member 41 which are two positions separated in the longitudinal direction. Each rubber material 46a is pressed against the upper surface of each of the two moving handrails 7, 8 (FIG. 4). Even with such a configuration, the upper fixing member 41 can be fixed so as to span the two moving handrails 7 and 8. Other configurations and operations are the same as the configurations in FIGS. 1 to 8.

  DESCRIPTION OF SYMBOLS 1 Escalator, 2, 3 entrance / exit, 4 main frame, 5 fixed structure, 6 balustrade, 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 2nd intermediate sprocket, 24 1st handrail drive chain, 25 1st outer sprocket, 26 2nd outer sprocket, 27 1st belt side sprocket, 28 2nd handrail drive chain, 29 2nd belt side sprocket, 30 3rd handrail drive Chain, 31 first pressure roller, 32 second pressure roller, 3 Railing drive shaft, 34, 35 split main shaft, 36, 37 sprocket, 38 bearing, 39a, 39b flange, 40 railing shaft cutting support structure, 41 upper fixing member, 41a, 41b rail element, 41c bolt, 41d eye bolt, 42 body Part, 43 bottom plate part, 44 side plate part, 45 plate member, 46, 46a rubber material, 47 body plate part, 48 outer plate part, 49 coupling means, 50 cutting device engaging member, 51 turnbuckle, 52 chain, 53 annular Member, 53a first portion, 53b second portion, 54 intermediate coupling member, 54a plate portion, 54b bolt, 55 rope, 56 ring portion, 58 cutting support portion, 59 chain element, 60 first connection member, 61 first ring , 62 second ring, 63 chain block, 64 second connecting member, 70 pulling part Material, 70a Lower joining part, 80 Cutting device, 81 Holding part, 82 Blade part.

Claims (8)

A main frame arranged between the pair of entrances and exits, two left and right handrails arranged to be able to circulate between the pair of entrances and exits, and a handrail rotatably supported in the main frame. A handrail shaft for cutting the handrail drive shaft of an escalator including a drive shaft 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 handrails A support structure,
A long upper fixing member that is fixed across the upper surface of the two moving handrails,
A first connection member connected in a state of being pulled to a first longitudinal position of the upper fixing member and a first axial position of the handrail drive shaft;
An annular member connected to the upper fixing member, and a cutting device engaging member including a cutting support portion that is connected and connected to both sides with the lower end of the annular member as a boundary,
The cutting device engagement member,
A U-shaped portion formed at the lower end of the annular member is passed under 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, wherein a blade portion of the cutting device can be pressed against the handrail drive shaft in a state where a grip portion of the cutting device is inserted inside and the grip portion is engaged with the cutting support portion. The handrail shaft cutting support structure according to claim 1,
A handrail shaft cutting support structure, wherein both side portions of the cutting support portion are movable in a 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 moving handrails by being pulled at a part or a plurality of positions in a longitudinal direction in a direction oblique to a vertical direction from a fixing portion of the escalator, and is configured to hold a handrail shaft. Construction. In the handrail shaft cutting support structure according to any one of claims 1 to 3,
A second longitudinal position opposite to the first longitudinal position with respect to the cutting device engaging member; and 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. In the handrail shaft cutting support structure according to claim 4,
A handrail shaft cutting support structure, wherein at least one of the first connection member and the second connection member includes 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 at two positions pressed against the upper surfaces of the two moving handrails while being separated in a longitudinal direction of a lower surface. In the handrail shaft cutting support structure according to claim 6,
The upper fixing member is fixed at two positions separated in the longitudinal direction on a long main body portion bridged over the upper surfaces of the two moving handrails, and intersects with the main body portion. And two plate members extending in the direction,
The handrail shaft cutting support structure, wherein the two rubber materials are fixed to a portion of the main body plate portion that constitutes each of the two plate members, in contact with an upper surface of the moving 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,
Fixing the upper fixing member over the upper surface 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 while pulling the first connecting member;
The U-shaped part is passed under the handrail drive shaft and bent upward, and the grip of the cutting device is inserted inside the insertion part, and the grip is engaged with the cutting support. The step of causing
Pressing the blade portion of the cutting device against the handrail drive shaft to cut the handrail drive shaft.

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