JP6702808B2 - Boss removal jig - Google Patents

Description

Boss part removal cure used to remove the boss part to which the drive roller of the handrail drive device that drives the handrail of the passenger conveyor (escalator, moving walkway) is attached from the shaft part where the boss part is attached via a bearing. Regarding the ingredients.

The passenger conveyor includes a handrail drive device that circulates the handrail. As described in Patent Document 1, the handrail drive device includes a drive roller and a pressure roller arranged in the truss, and the drive roller is rotated by the drive roller drive mechanism. When the drive roller rotates while the handrail is sandwiched between the drive roller and the pressure roller, the handrail receives the frictional force from the drive roller and the pressure roller and circulates.

Although not described in Patent Document 1, generally, the drive roller is arranged on the outer peripheral surface of the annular boss portion. Further, the boss portion is attached to the shaft portion protruding from the main body base of the passenger conveyor via a bearing so as to be rotatable with respect to the shaft portion. The boss is provided with a sprocket around which a chain for applying power to the drive roller is provided coaxially with the drive roller. The drive roller is attached to one end side of the boss portion in the axial direction, and the sprocket is provided to the other end side of the boss portion in the axial direction. When the bearing is damaged and it becomes necessary to remove the boss, the drive roller is removed from the boss, and then the boss is removed from the shaft together with the bearing.

JP, 2007-8702, A

13 to 15 are views for explaining the replacement of the boss portion 72 in more detail, and are views for explaining the replacement of the boss portion 72 by the method of the reference example.

In the replacement of the boss portion 72 of this reference example, first, as shown in FIG. 13, from the drive roller unit 15 in which the drive roller 85 is disposed in the handrail drive device, the drive roller 85 is moved to the axial end surface of the boss portion 72. The bolt 89 fixed to the drive roller unit 15 is removed, and the drive roller 85 is removed from the drive roller unit 15.

Subsequently, as shown in FIG. 14, the C-shaped retaining ring 87 fitted in the annular groove of the shaft portion 71 in order to prevent the bearing 73 externally fitted to the shaft portion 71 from coming off is removed from the annular groove, The bearing 73 is placed in a state where it can be removed from the shaft 71.

After that, as shown in FIG. 15, by hooking the claw 91 of the gear puller 90 on the step portion 88 provided on the boss portion 72 and extending outward in the radial direction, the jack bolt 99 of the gear puller 90 is rotated. The tip of the jack bolt 99 is brought into contact with the axial end surface 71a of the shaft 71.

Next, by further rotating the jack bolt 99, the jack bolt 99 is relatively moved toward the shaft portion 71 side with respect to the main body portion 95 of the gear puller 90, and then the chain 20 is removed from the drive roller sprocket 86 of the boss portion 72. Remove. Specifically, with the jack bolt 99 slightly moved from the main body 95 of the gear puller 90 toward the pawl 91 (the boss 72 is slightly removed), the gear puller 90 is once removed from the boss 72. Then, the chain 20 is lifted by hand to remove the chain 20 from the drive roller sprocket 86, and then the gear puller 90 is mounted on the boss portion 72 again.

Then, by further turning the jack bolt 99, the claw 91 is moved outward in the axial direction with respect to the tip of the jack bolt 99 on the side of the shaft portion 71, and the boss portion 72 on which the claw 91 is locked is moved. The bearing 73 and the shaft 73 are pulled outward in the axial direction. In this way, the boss 72 and the bearing 73 are removed from the shaft 71.

According to the removal method of the boss portion 72 of this reference example, when the gear puller 90 is installed on the stepped portion 88 of the boss portion 72, the gear puller 90 is supported by one hand in the narrow space such as the truss while the other hand is supported. Although it is necessary to rotate the jack bolt 99, this work is not easy.

Further, when removing the chain 20 from the drive roller sprocket 86 at a position where the boss portion 72 is slightly removed, the gear puller 90 is once removed from the boss portion 72, the chain 20 is removed from the sprocket, and then the gear puller 90 is again bossed. Although it is necessary to hang it on the portion 72, the work of removing and re-hanging the gear puller deteriorates work efficiency.

Furthermore, the gear puller 90 drops downward when the boss 72 is suddenly pulled out or when a certain pulling force is not present. Therefore, the gear puller 90 needs to be supported at all times and is difficult to handle.

An object of the present invention is to provide a boss removing jig that can easily remove the boss from the shaft even in a narrow truss and can improve work efficiency.

The boss portion removing jig according to the present disclosure removes an annular boss portion to which a drive roller of a handrail driving device that drives a handrail of a passenger conveyor is attached from a shaft portion to which the boss portion is attached via a bearing. A jig for removing a boss used for, wherein a male screw is provided on the outer peripheral surface, and a tip end is in contact with the axial end face of the shaft portion, and a female screw internally screwed to the male screw. A boss fixing member that is provided, one surface of which is an abutting surface that comes into contact with an end surface of the boss portion in the axial direction, and that has a through hole into which a fastening member for fixing to the end surface of the boss portion is inserted; By rotating the shaft member while the boss fixing member is fixed to the boss portion, the boss portion is removed from the shaft portion together with the boss fixing member.

The boss removing jig of the present disclosure is used as follows, for example. First, by removing the fastening member that fixes the drive roller to the boss portion from the tap hole of the boss portion, the drive rotor is removed from the boss portion and the tap hole is exposed to the outside. After that, with one surface (contact surface) of the boss fixing member abutting on the axial end surface of the boss portion, the fastening member is tightened into the tap hole of the boss portion through the insertion hole of the boss fixing member. , The boss fixing member is fixed to the boss portion. Next, by rotating the shaft member, the male screw of the shaft member is relatively moved to the shaft portion side with respect to the female screw of the boss fixing member, and the boss fixing member is relatively moved to the shaft member side opposite to the shaft member side. To move. As a result, the boss portion fixed to the boss fixing member also moves in the axial direction to the side opposite to the shaft portion side, and the boss portion is pulled out from the shaft portion in the axial direction together with the bearing.

According to the present disclosure , the boss portion can be pulled out from the shaft portion only by rotating the shaft member after fixing the boss fixing member to the boss portion using the fastening member. Therefore, the boss can be easily removed from the shaft even in a narrow truss.

The jig for removing the boss portion according to the present invention is an annular boss portion to which a drive roller of a handrail driving device that drives a handrail of a passenger conveyor is attached, from a shaft portion where the boss portion is attached via a bearing. A jig for removing a boss portion used for removing, wherein a male screw is provided on an outer peripheral surface, and a tip is abutted against an axial end face of the shaft portion, and the jig is internally screwed to the male screw. A boss fixing having a female screw, one surface of which serves as an abutting surface that abuts an axial end surface of the boss portion, and which has an insertion hole through which a fastening member for fixing to the end surface of the boss portion is inserted. A member, the boss fixing member is fixed to the boss portion, and the boss portion is removed from the shaft portion together with the boss fixing member by rotating the shaft member. Pin and the sprocket that is provided integrally with the drive roller and on which the chain is stretched, so that the tip of the pin remains inserted between the teeth of the sprocket in order to float the chain. A pin support member for supporting the pin support member, the pin support member being disposed on a side farther from the chain than the insertion hole in the through hole through which the shaft member passes, and the fastening member, There is a far side insertion hole that is inserted, and a plurality of pin insertion holes that are provided outside the far side insertion hole in the radial direction of the shaft member, and the pin insertion hole is in the pin insertion hole. tip of the inserted the pin Ru is disposed at a position that can be inserted between the teeth of the sprocket.

On the outer peripheral surface of the boss portion, a sprocket on which a chain that transmits the power for rotating the drive roller is wound is provided. According to the present invention , the pin support member can be fixed to the boss portion together with the boss fixing member by the fastening member. Then, after inserting the pin into the pin insertion hole of the pin support member and fitting the tip of the pin between the teeth of the sprocket that does not interfere with the chain, rotate the boss with respect to the shaft. Simply, the tip of the pin can be moved between the chain and the teeth of the sprocket. Therefore, the fitting between the chain and the sprocket can be removed with a pin, and the chain can be floated from the sprocket, so the user can save the labor of removing the chain from the sprocket by hand, and the work efficiency of pulling out the boss part Can be further improved.

When the pin support member is provided, the pin support member may be provided integrally with the boss fixing member.

According to the above configuration, since the pin support member is provided integrally with the boss fixing member, when fixing the pin support member and the boss fixing member to the boss portion, the circumferential phase of the pin supporting member is set to the circumferential direction of the boss fixing member. There is no need to match the phase of. Therefore, the pin support member and the boss fixing member can be easily fixed to the boss portion.

A jig for removing a boss portion according to another aspect of the present invention is an annular boss portion to which a drive roller of a handrail drive device that drives a handrail of a passenger conveyor is attached, and the boss portion is attached via a bearing. A jig for removing a boss portion used for removing from a shaft portion, wherein the outer peripheral surface is provided with a male screw and a tip end is in contact with an axial end face of the shaft portion, and the male screw is internally provided. Is provided with a female screw to be screwed into, one surface serves as an abutment surface that comes into contact with an axial end surface of the boss portion, and a plurality of fastening members for fixing the end surface of the boss portion are inserted. A boss fixing member having an insertion hole, wherein the boss fixing member has a disk-shaped portion, the plurality of insertion holes are arranged at intervals in the circumferential direction of the disk-shaped portion, To rotate the shaft member in a state where the boss fixing member is fixed to the boss portion, thereby removing the boss portion together with the boss fixing member from the shaft portion , and further rotating the shaft member. A handle portion integrally provided with the shaft member on a side opposite to the axial end side of the shaft member, and the boss portion from the shaft portion at the axial end portion of the shaft member. A plate-shaped rotary seat is provided for bringing the shaft member that rotates with respect to the shaft portion into contact with the axial end surface of the shaft portion when detached , and the handle portion extends in the radial direction of the shaft member. Has one or more rod-shaped portions .

According to the present invention , since the rotating grip portion for rotating the shaft member is provided on the side opposite to the tip end side in the axial direction of the shaft member, a large rotation torque can be applied to the shaft member. Further, since a plate-shaped rotary seat that can contact a large area of the axial end surface of the shaft portion is provided at the axial end portion of the shaft member, the surface pressure applied to the end surface of the shaft portion and the distal end of the shaft member can be reduced. It can be reduced. Therefore, even if the shaft member relatively rotates with respect to the shaft portion in the state where the tip portion of the shaft member is in contact with the end surface of the shaft portion, the end surface of the shaft portion and the tip portion of the shaft member are less likely to be damaged. Further, since the rotary grip portion is composed of the handle portion that extends in the radial direction, a large torque can be applied to the shaft member without using a tool.

With the boss removing jig according to the present invention, the boss to which the drive roller is attached can be easily removed from the shaft even in a narrow truss, and work efficiency can be improved.

It is a schematic block diagram of the escalator containing a handrail drive device. FIG. 6 is a cross-sectional view in the axial direction of a drive roller unit of the handrail drive device. It is a front view of a boss part removal jig. It is a B arrow line view when seeing the pin support member from the direction shown by the arrow B in FIG. It is a front view of the pin inserted in the pin insertion hole of the pin support member. FIG. 6 is a partial axial cross-sectional view of a drive roller unit in a maintenance state. FIG. 6 is a partial axial cross-sectional view of a drive roller unit in a maintenance state. FIG. 2 is a front view showing a maintenance-in-progress state of two drive roller units arranged on one side of the idler sprocket in the extending direction of the balustrade in FIG. 1. FIG. 2 is a front view showing a maintenance-in-progress state of two drive roller units arranged on one side of the idler sprocket in the extending direction of the balustrade in FIG. 1. It is a front view of the jig for boss part removal of a modification. FIG. 11 is a view as seen from an arrow D when the boss removing jig of the modified example is viewed from the direction shown by an arrow D in FIG. 10. FIG. 11 is a partial cross-sectional view in the axial direction of the drive roller unit in the mid-maintenance state using a boss removing jig of a modified example. It is a figure explaining exchange of the boss part by the method of a reference example. It is a figure explaining exchange of the boss part by the method of a reference example. It is a figure explaining exchange of the boss part by the method of a reference example.

Embodiments according to the present invention will be described in detail below with reference to the accompanying drawings. In addition, although the case where the passenger conveyor is the escalator 1 will be described below, the passenger conveyor may be a moving walkway in which a plurality of steps are connected without steps. In addition, it is assumed from the beginning that a new embodiment is constructed by appropriately combining the characteristic portions of the embodiment and the modified examples described below.

FIG. 1 is a schematic configuration diagram of an escalator 1 including a handrail drive device 11. 2 is an axial cross-sectional view of the drive roller unit 15 of the handrail drive device 11. The jig 30 for removing the boss portion according to the embodiment of the present invention removes the boss portion 72 to which the drive roller 85 of the drive roller unit 15 is attached from the shaft portion 71 to which the boss portion 72 is attached via the bearing 73. Used to. Hereinafter, first, the structures of the escalator 1, the handrail drive device 11, and the drive roller unit 15 will be described with reference to FIGS. 1 and 2.

As shown in FIG. 1, the escalator 1 includes a body frame 13, a pair of balustrades 2, a plurality of steps 3, a step chain 6, an upper step sprocket 4, a lower step sprocket 5, a drive sprocket 7, a drive chain 9, a handrail 10, The handrail drive sprocket 12, the first handrail chain 18, and the drive unit 8 are provided.

The main body frame 13 is disposed across the adjacent floors, and the pair of balustrades 2 are provided on both sides of the main body frame 13 in the width direction. The step 3 is arranged between the pair of balustrades 2. The plurality of steps 3 are connected endlessly by a step chain 6, and the step chain 6 is bridged between an upper step sprocket 4 and a lower step sprocket 5.

The drive sprocket 7 is provided coaxially with the upper step sprocket 4, and the drive chain 9 is stretched between the drive sprocket 7 and the drive machine 8. The driving force of the driving machine 8 is transmitted to the step chain 6 via the drive chain 9, the drive sprocket 7, and the upper step sprocket 4, so that the step chain 6 moves between the upper step sprocket 4 and the lower step sprocket. It circularly moves, and accordingly, the plurality of steps 3 cyclically move.

The handrail 10 is attached to the periphery of the balustrade 2 so as to be capable of circulating movement, and is circularly moved by the handrail driving device 11. More specifically, the handrail drive device 11 is driven by a first handrail chain 18 wound around a handrail drive sprocket 12 provided coaxially with the upper step sprocket 4.

The handrail drive device 11 includes a plurality of drive roller units 15, a pressure roller 17, an idler sprocket 19, a double sprocket 21, and a second handrail chain 20. The drive roller unit 15 is integrally provided with a drive roller 85 (see FIG. 2) and a drive roller sprocket 86 (see FIG. 2) coaxially and integrally. The drive roller 85, the pressure roller 17, the idler sprocket 19, and the double sprocket 21 are rotatably attached to an attachment frame 25 (see FIG. 2) extending substantially parallel to the balustrade 2.

The pressure roller 17 is disposed at a position facing the drive roller 85 with the handrail 10 interposed therebetween, and the idler sprocket 19 is disposed closer to the double sprocket 21 than the drive roller unit 15. The twin sprockets 21 are provided with first and second sprockets 21a and 21b coaxially.

The second handrail chain 20 has an endless loop shape, and is stretched around the drive roller sprocket 86, the idler sprocket 19, and the first sprocket 21 a. Although not described in detail, the shaft portion of the idler sprocket 19 is attached to a long hole (not shown) extending in the direction indicated by the arrow A in FIG. 1, and the attachment position of the idler sprocket 19 is movable in the direction of the arrow A. It has become. Therefore, the tension of the second handrail chain 20 can be adjusted by adjusting the attachment position of the idler sprocket. The power of the drive unit 8 causes the double sprocket 21 to rotate via the first handrail chain 18, and as a result, the second handrail chain 20 circulates and the second handrail chain 20 is wound around the drive roller. The drive roller 85 integrated with the vehicle sprocket 86 rotates. The handrail 10 sandwiched between the drive roller 85 and the pressure roller 17 is frictionally driven by the rotation of the drive roller 85. The pressure roller 17 presses the handrail 10 against the drive roller 85 and is driven to rotate.

Next, a detailed structure of the drive roller unit 15 will be described. As shown in FIG. 2, the drive roller unit 15 has a shaft portion 71, a boss portion 72, two bearings 73, a drive roller 85, and a C-shaped retaining ring 87. The shaft portion 71 is integrally formed with a flat plate-shaped main body portion 25a extending in the mounting frame 25 in the vertical direction, and protrudes in the normal direction from one surface of the main body portion 25a. The boss portion 72 is rotatably attached to the shaft portion 71 via two bearings 73. A drive roller sprocket 86 is provided on the outer peripheral surface of the boss 72 on the side of the main body 25a, and the second handrail chain 20 is stretched over the drive roller sprocket 86.

A cylindrical outer peripheral surface 75 for mounting a drive roller is provided on the outer peripheral surface of the boss portion 72 opposite to the main body portion 25a side, and an axial end surface of the boss portion 72 opposite to the main body portion 25a side is provided. A tap hole for attaching the drive roller 85 is provided. Further, the drive roller 85 has a circular cap shape as a whole, and has a configuration in which the disc portion 93 is arranged on one side in the axial direction of the tubular portion 94. A part insertion hole 85a and a bolt insertion hole 85b are provided. The drive roller 85 is attached to the boss portion 72 by tightening the bolt 89 into the bolt insertion hole 85 b of the disc portion 93 and the tap hole of the boss portion 72 while the cylinder portion 94 is fitted onto the outer peripheral surface 75 of the cylinder. The C-shaped retaining ring 87 is recessed in an annular groove for attaching the C-shaped retaining ring provided at the tip of the shaft 71. The C-shaped retaining ring 87 is provided to prevent the bearing 73 from coming off the shaft portion 71. The drive roller 85 rotates around the shaft 71, and a portion of the peripheral surface of the drive roller 85 facing the pressure roller 17 contacts the handrail 10 to feed the handrail 10.

Next, the structure of the boss removing jig 30 will be described. FIG. 3 is a front view of the boss removing jig 30. As shown in FIG. 3, a boss removing jig (hereinafter simply referred to as a jig) 30 includes a shaft member 31, a handle portion 32 as an example of a rotating grip portion, a boss fixing member 33, and a pin supporting member 34. The handle portion 32 is provided integrally with the shaft member 31 on the side opposite to the tip end side in the axial direction of the shaft member 31.

A male screw 31a is provided on the outer peripheral surface of the shaft member 31, and a disc-shaped rotary seat 31b that spreads in the radial direction of the shaft member 31 is provided at the axial end of the shaft member 31. The rotary seat 31b is provided so that the shaft portion 71 of the drive roller unit 15 (see FIG. 2) can stably support the shaft member 31.

The handle portion 32 is composed of two rod-shaped portions 32 a, and each rod-shaped portion 32 a extends from the shaft member 31 in the radial direction of the shaft member 31. The two rod-shaped portions 32a are located on the same straight line that passes through the center of the circular cross section of the shaft member 31. Note that, unlike this embodiment, the handle portion may be composed of one or three or more rod-shaped portions extending in the radial direction of the shaft member. Further, the rotating grip portion may not be configured by the handle portion 32 including the rod-shaped portion 32a, and is a head of a thumbscrew integrally provided with the shaft member on the side opposite to the tip end side in the axial direction of the shaft member. It may be configured. Further, the rotating grip portion may be configured by a hexagonal turning portion or the like, or may be configured such that a tool such as a spanner is hung and turned. Alternatively, the rotary grip may not be provided on the shaft member. According to the present embodiment, since the rotary grip portion is composed of the handle portion 32 extending in the radial direction, a large torque can be applied to the shaft member 31 without using a tool.

The boss fixing member 33 has a first disc portion 35 and a second disc portion 36. The second disc portion 36 is welded to the end surface of the first disc portion 35 on the handle portion 32 side. It is fixed by a fixing means composed of an adhesive or the like. A through hole 35a that is sufficiently larger than the rotary seat 31b is provided in the central portion of the first disk portion 35. In addition, the second disc portion 36 has an inner peripheral surface 37 provided with a female screw 36a at the center thereof. The central axis of the through hole 35a and the central axis of the female screw 36a are located on the same straight line. The shaft member 31 can pass through the through hole 35a of the first disc portion 35, and the male screw 31a of the shaft member 31 is screwed into the female screw 36a of the second disc portion 36.

The first disc portion 35 is provided with a plurality of insertion holes 35b, into which bolts 39 as an example of a fastening member are inserted. The plurality of insertion holes 35b penetrate the first disc portion 35 on the outer side in the radial direction of the through hole 35a, and are circumferentially outward in the radial direction with respect to the through holes 35a and the second disc portion 36. Spaced from each other.

As shown in FIG. 2, the axial end surface 47 of the boss portion 72 is provided with a plurality of tap holes 72 a for fixing the drive roller 85 to the end surface 47 of the boss portion 72 with bolts 89. 2 and 3, the shaft member 31 is located at the center of the shaft portion 71, and the entire surface of the rotary seat 31b is in contact with the substantial center of the axial end surface 71a of the shaft portion 71. The insertion hole 35b can be arranged at a position overlapping the plurality of tap holes 72a when viewed in the axial direction (hereinafter, overlapping when viewed in the axial direction is referred to as overlapping in the axial direction).

The case where the second disc portion 36 is fixed to the end face of the first disc portion 35 on the handle portion 32 side by welding, an adhesive, or the like has been described. However, the first disc portion and the second disc portion may be integrally formed by, for example, casting. Further, the second disk portion may not be present, and instead of providing the first disk portion with the through hole through which the shaft member 31 passes, a screw hole that is screwed into the male screw of the shaft member 31 may be provided. Good. Further, although the case where the rotary seat 31b is provided on the shaft member 31 has been described, the rotary seat may not be provided on the shaft member.

Referring to FIG. 3, the pin support member 34 is provided to support the pin 40 (see FIG. 5) for floating the second handrail chain 20. The pin support member 34 is a disk-shaped member, and has a through hole 34a through which the shaft member 31 passes, a plurality of insertion holes 34b into which the bolts 39 are inserted, and a plurality of pin insertion holes 34c. The insertion hole 34b is arranged on the handle portion 32 side (farther than the handle portion 20) in the axial direction of the insertion hole 35b of the boss fixing member 33. The insertion hole 34b of the pin support member 34 constitutes a far side insertion hole. The plurality of pin insertion holes 34c are arranged outward of the insertion holes 34b in the radial direction of the shaft member 31. The plurality of pin insertion holes 34c are provided on the concentric circles of the through holes 34a, and each pin insertion hole 34c penetrates the pin support member 34.

The through hole 34a of the pin support member 34 has a large diameter hole portion 34a1 and a small diameter hole portion 34a2 having an inner diameter smaller than that of the large diameter hole portion 34a1. That is, the pin support member 34 has a thick peripheral portion where the plurality of pin insertion holes 34c are provided, and has a thin annular step portion 34a3 extending inward in the radial direction from the peripheral portion. A large-diameter hole portion 34a1 is formed inside the thick portion where the step portion does not project, and a small-diameter hole portion 34a2 is formed inside the step portion 34a3. The large diameter hole portion 34a1 is arranged closer to the rotary seat 31b than the small diameter hole portion 34a2. The central axis of the large diameter hole portion 34a1 and the central axis of the small diameter hole portion 34a2 substantially coincide with each other.

The inner diameter of the small diameter hole portion 34a2 is slightly (slightly) larger than the outer diameter of the second disc portion 36 of the boss fixing member 33 and smaller than the outer diameter of the first disc portion 35. The inner diameter of the large diameter hole portion 34a1 is slightly (slightly) larger than the outer diameter of the first disc portion 35. The axial length of the first disc portion 35 is the same as or slightly (slightly) longer than the axial length of the large diameter hole portion 34a1.

The plurality of insertion holes 34b are provided outside the small diameter hole portion 34a2 in the pin support member 34 in the radial direction and inside the large diameter hole portion 34a1 in the radial direction, and extend substantially parallel to the through hole 34a. .. Further, in a state where the central axis of the boss fixing member 33 and the central axis of the pin supporting member 34 are aligned with each other, the plurality of insertion holes 34b of the pin supporting member 34 correspond to the plurality of insertion holes 35b of the boss fixing member 33. It can be placed at a position where it overlaps in the axial direction. That is, since the intervals in the circumferential direction are the same, by matching the holes 34b, 35b of both of them, all the holes 34b, 35b are matched.

As a result, the first disc portion 35 can be fitted into the large-diameter hole portion 34a1 until the end face of the first disc portion 35 on the second disc portion 36 side comes into contact with the step portion 34a3 of the pin support member 34. Further, in this state, the bolt 39 is passed through the insertion hole 34b of the pin support member 34 and the insertion hole 35b of the boss fixing member 33, and then tightened in the tap hole 72a (see FIG. 2) of the boss portion 72. Thus, the boss fixing member 33 and the pin supporting member 34 can be fixed to the boss portion 72 at the same time.

Although the case where the boss fixing member 33 and the pin supporting member 34 are separate members has been described, the boss fixing member and the pin supporting member may be integrally configured. In this case, the pin supporting member and the boss The fixing member can be easily fixed to the boss. Further, the case where the first disk portion 35 of the boss fixing member 33 is fitted into the large diameter hole portion 34a1 of the pin supporting member 34 has been described, but the pin supporting member does not have the large diameter hole portion and the boss fixing member is fixed. The end surface of the member on the one side in the axial direction may be in contact with the end surface of the pin supporting member on the other side in the axial direction.

FIG. 4 is a B arrow view of the pin support member 34 when viewed from the direction indicated by the arrow B in FIG. As shown in FIGS. 3 and 4, the plurality of pin insertion holes 34c are provided radially outward of the large diameter hole portion 34a1, and the plurality of insertion holes 34b have a diameter larger than that of the large diameter hole portion 34a1. It is provided on the inner side of the direction. Further, the plurality of insertion holes 34b are provided at equal intervals on the same circle centered on the center of the through hole 34a, and the plurality of pin insertion holes 34c are also arranged on the same circle centered on the center of the through hole 34a. It is provided at intervals. In addition, the plurality of pin insertion holes may not be provided at equal intervals on the same circle centered on the center of the through hole, and for example, only a local portion of a phase of a part of the circle in the circumferential direction may be provided. It may be provided at equal intervals in the circumferential direction except for the interval between the pin insertion holes at both ends in the direction.

The pin 40 whose front view is shown in FIG. 5 is inserted into the pin insertion hole 34c. As shown in FIG. 4, the pin 40 has a shaft portion 43 and a handle portion 41, and the handle portion 41 is provided on one axial side of the shaft portion 43. The shaft portion 43 can be inserted into the pin insertion hole 34c, whereas the handle portion 41 cannot be inserted into the pin insertion hole 34c. The shaft portion 43 is inserted into the pin insertion hole 34c from the handle portion 32 side until the handle portion 41 is caught on the end surface of the pin support member 34 on the handle portion 32 side. The role of the pin 40 will be described in detail below.

Next, mainly using FIG. 6 to FIG. 9, a method of using the jig 30 will be described with an example of replacing the drive roller 85, the boss 72 and the two bearings 73 from the drive roller unit 15 (see FIG. 2 ). explain. 6 and 7 are partial cross-sectional views in the axial direction of the drive roller unit 15 during the maintenance. Further, FIGS. 8 and 9 are front views showing a maintenance in-progress state of the two drive roller units 15 arranged on one side of the idler sprocket 19 in the extending direction of the balustrade 2 in FIG. 8 and 9, only the tip of the pin 40 is shown in order to facilitate understanding of the role of the pin 40.

First, as shown in FIG. 6, the drive roller 85 is detached from the drive roller unit 15 before maintenance by removing the bolt 89 from the drive roller unit 15 before maintenance shown in FIG. The mold retaining ring 87 is removed. In this state, as shown in FIG. 6, the bearing 73 can be detached from the shaft portion 71 in the axial direction thereof.

Next, referring to FIG. 1, the idler sprocket 19 is moved to the drive roller unit 15 side in the direction indicated by the arrow A in FIG. 1, and the second handrail chain 20 is loosened. After that, as shown in FIG. 7, until the end surface of the first disc portion 35 of the boss fixing member 33 on the side of the second disc portion 36 contacts the step portion 34 a 3 of the pin support member 34, the first disc portion 35. Is fitted into the large diameter hole portion 34a1. After that, the bolt 39 is passed through the insertion hole 34b of the pin support member 34 and the insertion hole 35b of the boss fixing member 33, and then tightened in the tap hole 72a of the boss portion 72, so that the boss fixing member 33 and the pin The support member 34 is fixed to the boss portion 72 at the same time. In this state, the end surface 48 of the boss fixing member 33 on the boss portion 72 side in the axial direction contacts the end surface 47 of the boss portion 72 in the axial direction. The end surface 48 of the boss fixing member 33 constitutes one surface (contact surface) that contacts the axial end surface 47 of the boss portion 72.

Subsequently, the pins 40 are inserted from the handle portion 32 side into some of the pin insertion holes 34c of the pin support member 34. Specifically, referring to FIGS. 4 and 8, the number of pin insertion holes 34c is equal to the number of teeth 86a of the drive roller sprocket 86. 7 and 8, with the boss fixing member 33 and the pin supporting member 34 fixed to the boss portion 72, at least a part of the pin insertion hole 34c has a sprocket 86 for the drive roller of the boss portion 72. Is provided at a position where the space between the teeth 86a having a triangular cross section can overlap in the axial direction. That is, by appropriately rotating the boss portion 72 relative to the shaft portion 71, the circumferential position of the pin insertion hole 34c (phase in the circumferential direction) and the circumference of the space between the teeth 86a of the sprocket 86 for the drive roller are surrounded. If the position in the direction is matched, at least a part of the pin insertion hole 34c overlaps the space in the axial direction. Further, as shown in FIG. 7, the length of the shaft portion 43 of the pin 40 is determined from the end surface 59 of the pin support member 34 on the side of the handle portion 32 in the axial direction to the main body portion 25a of the mounting frame 25 of the drive roller sprocket 86. It is longer than the axial distance to the side end surface 86b.

As a result, the pin 40 that has been inserted all the way into the pin insertion hole 34c passes through the space between the teeth 86a of the drive roller sprocket 86, and the tip end of the pin 40 has a body portion 25a that is larger than that of the drive roller sprocket 86. Located on the side. In the example shown in FIG. 8, the plurality of pins 40 are several pins so as to fit between the teeth 86a on the right side surface of the drive roller sprocket 86 of the drive roller unit 15 located on the left side in the plane of FIG. It is inserted into the insertion hole 34c.

After that, the drive roller sprocket 86 of the drive roller unit 15 located on the left side is rotated counterclockwise as indicated by an arrow C in FIG. 8 with respect to the main body portion 25a of the mounting frame 25. Then, as shown in FIG. 9, the plurality of pins 40 are positioned on the upper side and the left side surface side of the drive roller unit 15 located on the left side, and all or most of the tip ends of the pins 40 are moved to the second handrail. Contact the chain 20. In this manner, the second handrail chain 20 is floated from the teeth 86a of the drive roller sprocket 86 by the plurality of pins 40, and is arranged at a position radially spaced from the teeth 86a of the drive roller sprocket 86. .. In this embodiment, the number of the pins 40 is smaller than the number of the pin insertion holes 34c, but the plurality of pin insertion holes are locally provided only in a partial phase portion in the circumferential direction of the pin support member. In the case where the pins are centrally provided, the number of pins may be the same as the number of pin insertion holes.

After that, referring to FIG. 7, the handle portion 32 is rotated so that the male screw 31 a of the shaft member 31 moves relatively to the axial portion 71 side in the axial direction with respect to the female screw 36 a of the boss fixing member 33. The rotary seat 31b is brought into contact with the axial end surface 71a of the shaft portion 71. Then, by further rotating the handle portion 32 in the same direction, the female screw 36a of the second disc portion 36 is moved in the axial direction toward the handle portion 32 side in the axial direction with respect to the male screw 31a of the shaft member 31. Then, the boss portion 72 fixed to the boss fixing member 33 is pulled out together with the bearing 73 in the axially outward direction. At the time of this withdrawal, the second handrail chain 20 is driven by the second handrail chain 20 until the drive roller sprocket 86 is axially moved to a position where it does not interfere with the second handrail chain 20 by the pin 40 withdrawn along with the boss fixing member 33. It remains floating from above. Therefore, the second handrail chain 20 is prevented from being again hooked on the drive roller sprocket 86 by gravity, and the boss portion 72 can be easily pulled out without interfering with the second handrail chain 20. After that, the bolt 39 that fixes the boss fixing member 33 and the pin support member 34 to the boss portion 72 is removed from the boss portion 72, and the removal of the boss portion 72 and the bearing 73 from the shaft portion 71 is completed.

According to the above-described embodiment, the boss portion 72 can be pulled out from the shaft portion 71 only by rotating the shaft member 31 after fixing the boss fixing member 33 to the boss portion 72 using the bolt 39. Therefore, the boss 72 can be easily removed from the shaft 71 even in a narrow truss.

Further, the bolt 39 allows the pin support member 34 to be fixed to the boss portion 72 together with the boss fixing member 33. Then, after that, the pin 40 is inserted into the pin insertion hole 34c of the pin support member 34, and the tip end portion of the pin 40 is fitted between the teeth 86a of the sprocket 86 for the drive roller, and then the boss portion 72 is attached to the shaft portion. The tip end of the pin 40 can be moved between the second handrail chain 20 and the tooth 86 a of the drive roller sprocket 86 simply by rotating the pin 40. Therefore, the pin 40 can remove the fitting between the second handrail chain 20 and the drive roller sprocket 86, and the second handrail chain 20 can be lifted from the drive roller sprocket 86. The labor for removing the handrail chain 20 from the drive roller sprocket 86 can be saved, and the work efficiency of pulling out the boss 72 can be improved.

Further, since the handle portion 32 for rotating the shaft member 31 is provided on the opposite side of the shaft member 31 from the tip end side in the axial direction, a large rotational torque can be applied to the shaft member 31. Further, since the plate-shaped rotary seat 31b that comes into contact with the axial end surface 71a of the shaft portion 71 is provided at the axial end portion of the shaft member 31, the shaft portion 71 is rotated by the relative rotation of the shaft member 31 with respect to the shaft portion 71. The end face 71a and the tip of the shaft member 31 are not easily scratched.

It should be noted that the present invention is not limited to the above-described embodiments and modifications thereof, and various improvements and changes can be made in the matters described in the claims of the present application and equivalent scopes thereof.

For example, in the above embodiment, the case has been described in which the pin 40 is inserted into the pin insertion hole 34c in which the female screw is not provided. However, a male screw may be provided on the shaft portion of the pin and a female screw may be provided on the pin insertion hole. Then, the pin may be fixed to the pin support member by screwing the male screw of the shaft portion of the pin into the female screw of the pin insertion hole. According to this modification, since the pin is fixed to the pin support member, the pin does not move due to the reaction force from the second handrail chain. Therefore, the pin can be reliably positioned between the second handrail chain and the drive roller sprocket, and the second handrail chain can be reliably floated from the drive roller sprocket.

In addition, the case where the jig 30 includes the pin 40 and the pin support member 34 having the pin insertion hole 34c has been described. However, the jig may include a chain floating member that is not a pin support member, and the pin does not have to exist. Specifically, the chain floating member has a cross section in which the pin insertion hole 34c extends axially from a part of a circle in which the pin insertion hole 34c is arranged on the circumference of the pin support member 34 of the above-described embodiment, instead of having the pin insertion hole. You may provide an arc-shaped board part. In this case, when the chain floating member is fixed to the boss portion, the chain floating member is fixed to a position where the plate portion having an arcuate cross section does not contact the second handrail chain. Then, by rotating the boss portion, to which the chain floating member is fixed, relative to the shaft portion, the plate portion having an arcuate cross section is positioned between the second handrail chain and the drive roller sprocket. According to this modified example, unlike the pin support member, it is not necessary to insert the pins into the chain floating member for floating the second handrail chain, so that it is possible to save the labor of inserting the plurality of pins into the pin insertion holes, and drive. The second handrail chain can be easily floated from the roller sprocket. Further, since it is unnecessary to manage the pins, the chain floating member can be easily managed. Furthermore, since the plate portion having an arcuate cross section does not move by the force from the second handrail chain, the second handrail chain can be reliably floated from the sprocket for the drive roller.

Further, the case where the bolt 39 for fixing the boss fixing member 33 and the pin support member 34 to the boss portion 72 is different from the bolt 89 for fixing the drive roller 85 to the boss portion 72 has been described. However, as the bolt 39 for fixing the boss fixing member 33 and the pin support member 34 to the boss portion 72, a bolt 89 for fixing the drive roller 85 to the boss portion 72 may be used.

Specifically, in the above-described embodiment, the pin support member 34 is provided with the large-diameter hole portion 34a1 that opens toward the boss portion 72 side, and the first disk portion 35 of the boss fixing member 33 is connected to the large-diameter hole portion of the pin support member 34. It was fitted in 34a1. Therefore, the length of the bolt 39 can be shortened by the axial length of the large diameter hole portion 34a1 as compared with the configuration in which the large diameter hole portion 34a1 is not provided in the pin support member 34. Therefore, even if the bolt 39 that fixes the boss fixing member 33 to the boss portion 72 also serves to fix the pin support member 34 to the boss portion 72, the length of the bolt 39 does not become too long. As a result, by appropriately adjusting the length of the bolt 39 and the depth of the tap hole 72a provided in the end surface 47 of the boss portion 72, the boss fixing member 33 is attached to the bolt 89 that fixes the drive roller 85 to the boss portion 72. Also, the role of the bolt 39 for fixing the pin support member 34 to the boss portion 72 can be combined. According to this modification, it is not necessary to newly prepare a bolt for fixing the boss fixing member 33 and the pin supporting member 34 to the boss portion 72, so that the manufacturing cost of the jig can be reduced. Further, since it is not necessary to use a bolt that is easily lost and it is not necessary to carry the bolt as a part of the jig, it becomes easy to manage and carry the jig.

Further, the case where the pin support member 34 is fixed to the boss portion 72 together with the boss fixing member 33 has been described. However, as shown in FIG. 10, that is, a front view of the boss removing jig 130 according to the modified example, the boss removing jig (hereinafter, simply referred to as a jig) 130 is the same as the shaft described in the above embodiment. It is composed of the member 31, the handle portion 32, the boss fixing member 33, and the bolt 139, and the pin support member 34 may not be included. In this modification, in FIG. 11, that is, when the jig 130 is viewed from the direction indicated by the arrow D in FIG. 10, the through hole 35a of the first disc portion 35 of the boss fixing member 33, The plurality of insertion holes 35b into which the bolts 139 (see FIG. 10) are inserted and the rotary seat 31b of the shaft member 31 are visually recognized.

When this jig 130 is used, the boss portion 72 is removed as follows. First, as shown in FIG. 12, that is, a partial axial cross-sectional view of the drive roller unit 15 in the middle of maintenance, the bolt 139 is inserted from the handle portion 32 side into the plurality of insertion holes 35b, and then the boss portion 72 is tapped. The boss fixing member 33 is fixed to the boss portion 72 by being tightened in the hole 72a. Next, the handle portion 32 is rotated to move the shaft member 31 relative to the boss fixing member 33 toward the shaft portion 71 side so that the rotary seat 31b of the shaft member 31 is brought into contact with the end surface 71a of the shaft portion 71. Subsequently, the handle portion 32 is further rotated in the same direction to relatively move the shaft member 31 toward the shaft portion 71 side in the axial direction with respect to the boss fixing member 33, thereby fixing the boss portion fixed to the boss fixing member 33. After slightly moving 72 toward the handle portion 32 side with respect to the shaft member 31, the second handrail chain 20 is removed from the drive roller sprocket 86 of the boss portion 72. Since the drive roller sprocket 86 has moved in the axial direction from the position where the second handrail chain 20 is bridged, the removed second handrail chain 20 is again driven by the gravity due to gravity. Never bite into.

After that, the handle portion 32 is further rotated to relatively rotate the shaft member 31 toward the shaft portion 71 side with respect to the boss fixing member 33, so that the boss portion 72 fixed to the boss fixing member 33 and the shaft portion 71 are fixed together. Pull out from 71 in the axially outward direction. In this way, the boss 72 and the bearing 73 are removed from the shaft 71. Needless to say, also in the jig 130 of the modified example, a bolt for fixing the drive roller 85 to the boss portion 72 can be used as a bolt for fixing the boss fixing member 33 to the boss portion 72. According to the jig 130 of this modification, the pin support member 34 does not exist. Therefore, the jig 130 can be easily manufactured at low cost, and the jig 130 can be easily carried.

1 escalator, 10 handrail, 11 handrail drive device, 20 second handrail chain, 30, 130 boss removing jig, 31 shaft member, 31a male screw, 31b rotary seat, 32 handle part, 33 boss fixing member, 34 pin support Member, through hole of 34a pin support member, insertion hole of 34b pin support member, pin insertion hole of 34c pin support member, 35b insertion hole, 36a female screw, 39, 139 bolt, 40 pin, 47 boss end surface, 48 boss One surface (end surface) of the fixing member, 71 shaft portion, 71a shaft end surface, 72 boss portion, 73 bearing, 85 drive roller, 86 drive roller sprocket, 86a tooth of drive roller sprocket.

Claims (3)

A jig for removing a boss portion used to remove an annular boss portion to which a drive roller of a handrail driving device for driving a handrail of a passenger conveyor is attached from a shaft portion attached through a bearing. ,
A shaft member provided with a male screw on the outer peripheral surface, the tip of which is in contact with the axial end surface of the shaft portion,
A female screw that is screwed into the male screw is provided inside, and one surface serves as a contact surface that contacts the axial end surface of the boss portion, and a fastening member for fixing to the end surface of the boss portion is inserted. A boss fixing member having a plurality of insertion holes,
Equipped with
The boss fixing member has a disk-shaped portion, the plurality of insertion holes are arranged at intervals in the circumferential direction of the disk-shaped portion,
Wherein in a state where the boss fixing member is fixed to the boss portion by the shaft member is rotated, and remove from the shaft portion of the boss portion with the boss fixing member,
Further, a handle portion integrally provided with the shaft member is provided on the side opposite to the tip end side in the axial direction of the shaft member for rotating the shaft member,
A plate shape at the axial end of the shaft member that contacts the shaft member that rotates with respect to the shaft portion with the axial end surface of the shaft portion when the boss portion is removed from the shaft portion. Is equipped with a rotating seat
The handle portion is a boss portion removing jig having one or more rod-shaped portions extending in the radial direction of the shaft member . A jig for removing a boss portion used to remove an annular boss portion to which a drive roller of a handrail driving device for driving a handrail of a passenger conveyor is attached from a shaft portion attached through a bearing. ,
A shaft member provided with a male screw on the outer peripheral surface, the tip of which is in contact with the axial end surface of the shaft portion,
A female screw that is screwed into the male screw is provided inside, and one surface serves as a contact surface that contacts the axial end surface of the boss portion, and a fastening member for fixing to the end surface of the boss portion is inserted. A boss fixing member having an insertion hole,
Equipped with
With the boss fixing member fixed to the boss portion, the shaft member rotates to remove the boss portion together with the boss fixing member from the shaft portion,
In addition, multiple pins,
In order to float the chain from a sprocket provided integrally with the drive roller and around which the chain is stretched, the tip of the pin is supported so as to be kept inserted between the teeth of the sprocket. A pin support member,
The pin support member is provided with a through hole through which the shaft member passes, a far side insertion hole that is disposed farther from the chain than the insertion hole in the axial direction and through which the fastening member is inserted, and the shaft. A plurality of pin insertion holes provided outside the far side insertion hole in the radial direction of the member,
The pin insertion hole is a jig for removing a boss portion, which is arranged at a position where the tip end portion of the pin inserted in the pin insertion hole can be inserted between the teeth of the sprocket. The jig for removing the boss portion according to claim 2,
A boss portion removing member in which the pin support member is provided integrally with the boss fixing member.