JP5389077B2 - Bearing removal equipment for passenger conveyor reducers - Google Patents

Description

  The present invention relates to a bearing unloader for a passenger conveyor speed reducer that is applied to a speed reducer that reduces the rotational speed of a motor that circulates and moves steps that are connected endlessly, and extracts a bearing from the speed reducer.

  FIG. 14 is a diagram showing a configuration of a drive unit including a conventional speed reducer provided with a bearing unloading device for a conventional passenger conveyor speed reducer, FIG. 15 is a diagram showing a configuration of the conventional speed reducer shown in FIG. These are figures which show the structure of a general reduction gear.

  Passenger conveyors generally consist of endlessly connected steps, balustrades arranged on both sides of the steps, handrails that are provided endlessly on these balustrades and circulate together with the steps, steps And a drive unit that drives to circulate and move the handrail. As shown in FIG. 14, the drive machine 1 is composed at least of a motor 3 that outputs power, a speed reducer 2 that decelerates the rotational speed of the motor 3, and a brake 4 attached to the speed reducer 2. ing.

  Conventionally, the speed reducer 2 is fitted with gears 6, 7, and 8 that reduce the rotational speed of the motor 3 and output these gears 6, 7, and 8, as shown in FIG. , 7, 8, a rotating shaft, for example, a low speed shaft 5 on the low speed side, a case 2 </ b> A in which the low speed shaft 5 is inserted, and a case 2 </ b> A provided to rotatably support the low speed shaft 5. Bearings 9 and 10 are provided. Note that the low-speed shaft 5 shown in FIG. 15 is disposed along the horizontal direction.

  The above-described case 2A has an upper case 2a and a lower case 2b formed so as to be split into upper and lower halves, and includes a portion of the low-speed shaft 5 so as to sandwich the bearings 9 and 10 from above and below. . Further, the gear 6 is disposed outside the case 2A, the bearing 9 is disposed on the side close to the gear 6 on both sides of the case 2A, and the bearing 10 is on the opposite side to the bearing 9 on both sides of the case 2A. That is, it is arranged on the tip portion side of the low speed shaft 5. The gears 7 and 8 are disposed along the low-speed shaft 5 between the bearings 9 and 10 in the case 2A.

  Further, the bearing 9 is rotatably provided between an outer 9a attached to the case 2A, an inner 9c provided on the inner side of the outer 9a and abutting the low-speed shaft 5, and the outer 9a and the inner 9c. It has a mounted roller, for example a conical roller 9b. Similarly, the bearing 10 is rotatable between an outer 10a attached to the case 2A, an inner 10c provided on the inner side of the outer 10a and abutting the low-speed shaft 5, and the outer 10a and the inner 10c. An intervening roller, for example, a conical roller 10b is provided. Note that the upper case 2a and the lower case 2b of the case 2A are detachably coupled by screws or the like (not shown).

  The passenger conveyor equipped with the drive unit 1 including the speed reducer 2 configured as described above is engaged with the gears 6, 7, and 8 when the motor 3 is driven to rotate the gears 6, 7, and 8. The low-speed shaft 5 is pivotally supported by the bearings 9 and 10 and rotates at a speed lower than the rotational speed of the motor 3, so that the traveling speed of the steps is adjusted to carry the passenger safely.

  Here, the bearings 9 and 10 that rotatably support the low-speed shaft 5 are deteriorated by the rotation of the low-speed shaft 5 or are loaded by the load of the low-speed shaft 5, so that the bearings 9 and 10 break down. Sound and vibration may occur. In this case, it is necessary to replace the bearings 9 and 10 with new ones.

  Therefore, when replacing the bearings 9 and 10 with new ones, the screw that joins the upper case 2a and the lower case 2a is removed, the upper case 2a is removed from the lower case 2b, and the low speed shaft 5 is taken out from the case 2A. Thus, the bearings 9 and 10 have been removed from the low-speed shaft 5 by a device such as a tool (not shown). Moreover, as one of the prior arts of a device for removing the bearings 9 and 10 from the low-speed shaft 5, a semi-cylindrical jaw formed so as to be vertically divided and formed on the end surface of each of the semi-cylindrical jaws in the outer circumferential direction. It has also been proposed to use a bearing holder that includes semicircular jaws and a back plate that is vertically contacted with the back side surfaces of these semicircular jaws and fastened by a plurality of bolts (for example, Patent Documents). 1).

  Specifically, the prior art bearing holder disclosed in Patent Document 1 is provided with a semicircular embankment projecting inwardly in the center of the inner hole at the inner hole inlet end of the opening of the semicylindrical jaw. A tapered inner hole is formed in the lower half inner hole at the back of the inner hole so as to meet the outer peripheral taper of the conical roller 9b, for example. Therefore, when removing the bearing 9 from the low-speed shaft 5 using the above-mentioned bearing holder, the conical roller 9b is sandwiched in the upper and lower semicylindrical jaws, and the semicircular embankment of the upper and lower semicylindrical jaws is locked to the conical roller 9b. Further, the pulley tip is locked to the upper and lower semicircular arc jaws so that the pulley is moved in the axial direction of the low speed shaft 5 so that the bearing 9 is extracted from the low speed shaft 5 together with the bearing holder. . Similarly, the bearing 10 can be detached from the low-speed shaft 5 by the bearing holder.

  Here, in recent years, as shown in FIG. 16, a reduction gear 22 different from the reduction gear 2 described above is generally provided in the driving machine 1 for the purpose of reducing noise. Although the basic configuration is the same as that of the conventional speed reducer 2 described above, a case 2B is provided instead of the case 2A. The case 2B is not separable like the upper case 2a and the lower case 2b of the case 2A, and is integrally formed with openings in the upper and side portions where the bearings 9 and 10 are respectively provided. Case body 2c, an upper lid 2d that covers the upper opening of the case body 2c, and a side lid 2e that covers the openings of the side portions of the case body 2c where the bearings 9 and 10 are respectively provided. , 2f.

JP-A-2-38525

  Therefore, when the bearings 9 and 10 are removed from the low speed shaft 5 of the general reduction gear 22, the low speed shaft 5 can be easily taken out from the case main body 2c by integrally forming the case main body 2c as described above. Therefore, it is necessary to perform an operation of removing the bearings 9 and 10 from the low speed shaft 5 in a state where the low speed shaft 5 is inserted into the case body 2c. Therefore, since the case main body 2c has an opening in the upper part, the upper lid 2d of the case 2B is removed from the case main body 2c, and the bearings 9 and 10 are moved from the opening of the case main body 2c to the low-speed shaft 5 using a tool or the like. It is possible to remove it from

  However, since the gears 7 and 8 are disposed along the low-speed shaft 5 between the bearings 9 and 10 in the case main body 2c, there is not much space for removing the bearings 9 and 10, and It is very difficult to perform the removal work of 10. In addition, since there is not enough space in the case body 2c, it is difficult to slide the low speed shaft 5 in the axial direction in order to facilitate the removal work of the bearings 9 and 10.

  Furthermore, when the bearings 9 and 10 are removed from the low-speed shaft 5 using the conventional bearing holder disclosed in Patent Document 1, a sufficient space is required on the outer periphery of the bearings 9 and 10. In a state in which 9 and 10 are accommodated in the case body 2c, that is, in a state in which the low speed shaft 5 is inserted into the case body 2c, the bearing holder is mounted by sandwiching the conical rollers 9b and 10b in the upper and lower half cylindrical jaws. Has become difficult. Therefore, if the bearings 9 and 10 cannot be removed from the low speed shaft 5 with the low speed shaft 5 inserted into the case body 2c, the complete set of the speed reducer 22 must be replaced with a new one. There is concern that the cost required for the replacement work of 10 will increase.

  The present invention has been made in view of the actual situation of the prior art as described above. The purpose of the present invention is to remove the bearing of a passenger conveyor speed reducer that can easily remove the bearing from the rotating shaft even when the rotating shaft is inserted into the case. To provide an apparatus.

  In order to achieve the above object, a passenger conveyor bearing removal device according to the present invention includes a gear that decelerates and outputs the rotational speed of a motor that circulates and moves the endlessly connected steps, and is fitted to the gear. A rotating shaft that rotates by the output of the gear, a case that inserts the rotating shaft therein, and a bearing that is provided in the case and rotatably supports the rotating shaft. A speed reducer for a passenger conveyor having an outer attached to the inner side, an inner provided inside the outer and abutting the rotating shaft, and a roller interposed rotatably between the outer and the inner Applied to the rotating shaft and the case, the bearing unloader of the passenger conveyor speed reducer is formed to be separable and inserted into the case. An annular block that is attached to the rotary shaft so as to fit the outer periphery of the rotary shaft on the inner peripheral surface and abuts against the inner and the roller, and a holding unit that integrally holds the annular block And the outer is inserted into the case through a gap between the case and the roller formed by removing the outer from the case, and the inner peripheral surface engages with the outer peripheral surface of the block; A block, the unloader, the inner, and a pulling means for pulling the roller integrally from the rotating shaft, the block having a male screw formed on the outer peripheral surface, It has a female screw formed on a peripheral surface and screwed into the male screw of the block.

  In the present invention configured as described above, an annular block formed so as to be separable is inserted into the case, and is attached to the rotating shaft so as to fit the outer periphery of the rotating shaft on the inner peripheral surface. By holding the blocks integrally by the holding means in a state of being in contact with each other, each block is fixed while pressing the inner and the rollers. On the other hand, by removing the outer from the case, a gap is generated between the case and the roller. Therefore, by inserting the unemployment into the case through this gap and screwing the female screw formed on the inner peripheral surface of the unemployment to the male screw formed on the outer peripheral surface of the block, the block, unemployment, inner And the roller can be fixed integrally. Then, by removing the fixed block, unplugged, inner, and roller integrally from the rotating shaft by the extracting means, the inner and the rollers are removed from the rotating shaft and the inner shaft even when the rotating shaft is inserted into the case. Easy to remove from the case. Thus, the bearing can be easily detached from the rotating shaft even when the rotating shaft is inserted into the case.

  Further, the bearing unloading device for a passenger conveyor speed reducer according to the present invention is the above-described invention, wherein the holding means comprises a spanner that sandwiches the block, and the unloading is a female screw hole formed on the outer surface. And the extraction means includes a screw rod that is screwed into the female screw hole portion of the unplugged and arranged parallel to the rotation shaft, and a hydraulic ram that displaces the screw rod. It is said.

  In the present invention configured as described above, the use of a spanner as a holding means when fixing each block to the inner and the rollers makes it easier for the operator to use and improves work efficiency. Moreover, since the spanner can be easily removed from the state where each block is sandwiched, high convenience can be ensured. Furthermore, the hydraulic ram can be quickly attached to the unemployment by screwing the screw rod of the extraction means into the female screw hole of the unemployment with the block, unemployment, inner, and roller fixed together. be able to. And by displacing a screw rod with a hydraulic ram, an inner and a roller can be smoothly extracted from a rotating shaft and a case, without damaging a rotating shaft.

  The apparatus for removing a bearing of a passenger conveyor speed reducer according to the present invention is formed so as to be separable, and is inserted into a case and is attached to a rotating shaft so as to fit the outer periphery of the rotating shaft on the inner peripheral surface. An annular block that contacts the roller, a holding means that integrally holds the annular block, and a gap between the case and the roller that are formed by removing the outer from the case and inserted into the case And an unloading means in which the inner peripheral surface engages with the outer peripheral surface of the block, and a extracting means for integrally extracting the block, the unloading, the inner, and the roller from the rotating shaft. The block has a male screw formed on the outer peripheral surface, and the unloader has a female screw formed on the inner peripheral surface and screwed into the male screw of the block. Therefore, the block is inserted into the case and mounted on the rotating shaft, and the unengaged female screw is screwed onto the male screw of the block in a state where the block is in contact with the inner of the bearing and the roller of the bearing by the holding means. By this, a block, unemployment, an inner, and a roller can be fixed integrally. Thereby, a block, a removal, an inner, and a roller can be easily extracted from a rotating shaft and a case by extraction means. As described above, since the bearing can be easily detached from the rotating shaft even when the rotating shaft is inserted into the case, the cost for replacing the bearing can be reduced as compared with the prior art, and the cost is excellent.

It is a bottom view which shows the block with which one Embodiment of the bearing removal apparatus of the passenger conveyor speed reducer which concerns on this invention is equipped. It is AA sectional drawing shown in FIG. It is CC sectional drawing shown in FIG. It is a top view which shows the unemployment with which this embodiment is equipped. It is DD sectional drawing shown in FIG. It is a figure which shows the spanner with which this embodiment is equipped. It is a figure explaining the use condition of this embodiment, and is a figure which shows the state which removed the upper cover and side cover of the case from the reduction gear to which this embodiment is applied. It is a figure explaining the use condition of this embodiment, and is a figure which shows the state which removed the outer and the gearwheel of the bearing from the reduction gear shown in FIG. It is a figure explaining the use condition of this embodiment, and is a figure which shows the state which mounted | wore the block shown in FIG. 1 with the low speed shaft of the reduction gear shown in FIG. It is a figure explaining the use condition of this embodiment, and is a figure which shows the state which the spanner shown in FIG. 6 hold | maintained the block shown in FIG. It is a figure explaining the use condition of this embodiment, and is a figure which shows the state which screwed the female screw of the unemployment shown in FIG. 2 to the male screw of the block shown in FIG. It is a figure explaining the use condition of this embodiment, and while removing the spanner shown in FIG. 11 from a block, it is a figure which shows the state which attached the extraction means with which this embodiment is equipped to unemployment. It is a figure which shows the state which removed the bearing, the block, the unemployment, and the extraction means from the reduction gear shown in FIG. It is a figure which shows the structure of the drive machine containing the conventional reduction gear provided with the bearing removal employment apparatus of the conventional passenger conveyor reduction gear. It is a figure which shows the structure of the conventional reduction gear shown in FIG. It is a figure which shows the structure of a general reduction gear.

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the bearing unemployment apparatus of the passenger conveyor speed reducer which concerns on this invention is demonstrated based on figures.

  One embodiment of a bearing removal device for a passenger conveyor speed reducer according to the present invention is applied to, for example, the general speed reducer 22 shown in FIG. 16 described above. Therefore, the same code | symbol is attached | subjected to the part which overlaps with the reduction gear 22 shown in FIG.

  As shown in FIG. 16, the speed reducer 22 to which this embodiment is applied is fitted with gears 6, 7, and 8 that reduce and output the rotational speed of the motor 3, and these gears 6, 7, and 8, A rotating shaft that rotates according to the output of the gears 6, 7, and 8, for example, a low-speed shaft 5 on the low-speed side, a case 2B that inserts the low-speed shaft 5 therein, and the case 2B are provided so that the low-speed shaft 5 can rotate. Bearings 9 and 10 to be supported are provided. Note that the low-speed shaft 5 shown in FIG. 16 is disposed along the horizontal direction.

  Further, the gear 6 is disposed outside the case 2B, the bearing 9 is disposed on the side closer to the gear 6 on both sides of the case 2B, and the bearing 10 is on the opposite side of the bearing 9 on both sides of the case 2B. That is, it is arranged on the tip portion side of the low speed shaft 5. The gears 7 and 8 are disposed along the low-speed shaft 5 between the bearings 9 and 10 in the case 2B.

  Further, the bearing 9 is provided between an outer 9a attached to the case 2B, an inner 9c provided on the inner side of the outer 9a, abutting the low-speed shaft 5, and an outer 9a and an inner 9c. For example, a conical roller 9b. Similarly, the bearing 10 is rotatably provided between an outer 10a attached to the case 2B, an inner 10c provided on the inner side of the outer 10a and contacting the low-speed shaft 5, and the outer 10a and the inner 10c. It has a mounted roller, for example, a conical roller 10b. The outer 9a and 10a do not need to be firmly fixed and can be removed.

  The case 2B described above includes, for example, a case main body 2c formed integrally with an opening at a portion where the bearings 9 and 10 are respectively provided in the upper portion and the side portion, and an opening at the upper portion of the case main body 2c. It has an upper lid 2d that covers and side lids 2e and 2f that cover the openings of the side portions of the case main body 2c where the bearings 9 and 10 are respectively provided. Yes.

  1 to 6, the present embodiment is formed so as to be separable, and is inserted into the case 2B and attached to the low speed shaft 5 so that the outer periphery of the low speed shaft 5 is fitted on the inner peripheral surface 11d. Then, the inner blocks 9c and 10c and the circular blocks 11 that contact the conical rollers 9b and 10b, the holding means that holds the circular blocks 11 integrally, and the outer portions 9a and 10a are removed from the case 2B. The block 12 is inserted into the case 2B through the gap between the case 2B and the conical rollers 9b, 10b, and the inner peripheral surface 12d engages with the outer peripheral surface 11c of the block 11, and the block 11, 12, inner 9c, 10c, and conical rollers 9b, 10b, which will be described later, are extracted from the low-speed shaft 5 integrally.

  Specifically, for example, the block 11 includes divided bodies 11A and 11B formed so as to be semi-dividable as shown in FIG. 1, and the upper surfaces 11a of these divided bodies 11A and 11B are shown in FIGS. The convex part 11g formed so that the width dimension when it fits as shown to B may be provided. On the other hand, the lower surface 11b of the block 11 is provided with a collar 11f that forms a peripheral edge so that the inner surface engages with the conical rollers 9b, 10b when the inner peripheral surface 11d is fitted to the low speed shaft 5. Further, a concave portion 11h that fits into the inner portions 9c and 10c when the inner peripheral surface 11d is fitted to the low speed shaft 5 is provided in the central portion of the lower surface 11b of the block 11. Further, the block 11 has a male screw 11c1 formed on the outer peripheral surface 11c.

  Further, the unemployment 12 is formed in a hollow annular shape through which the low-speed shaft 5 is inserted, for example, as shown in FIGS. 4 and 5, and outer surfaces 9a and 10a are formed on the upper surface 12a of the unemployment 12 from the case 2B. Thickness is set smaller than each interval of the gap between the case 2B and the conical rollers 9b, 10b formed by being removed, and a collar 12f that forms a peripheral edge is provided. Further, the unemployment 12 is formed, for example, on the distal end side of the flange 12f of the inner peripheral surface 12d, and is formed on the lower surface 12b of the outer surface and the female screw 12d1 that is screwed into the male screw 11c1 of the block 11, and is equally spaced. And four female screw hole portions 12e drilled at. The size of the collar 12f is set so as to include the inner 9c, 10c and the conical rollers 9b, 10b on the inner side when the female screw 12d1 of the unplugged 12 is screwed to the male screw 11c1 of the block 11. . Also, the four female screw hole portions 12e are provided so as to penetrate each.

  For example, as shown in FIG. 6, the holding means includes a spanner 13 that sandwiches the blocks 11 </ b> A and 11 </ b> B, and the opening of the spanner 13 is set to a size B so as to be fitted to the convex portion 11 g of the block 11. ing. Furthermore, the above-described extraction means includes, for example, four screw rods 14 that are screwed into the female screw holes 12e of the unemployment 12 as shown in FIG. And a hydraulic ram 17 for displacing. The hydraulic ram 17 is, for example, interposed between the hydraulic ram 17 and the low-speed shaft 5, and is attached integrally with a pusher 16 that receives the force of the hydraulic ram 17, and is a plate 15 through which the four screw rods 14 are inserted. And four nuts 17a that are screwed into the four screw rods 14 and fastened.

  Next, the operation of removing the bearing 9 from the low-speed shaft 5 will be described with reference to FIGS. 7 to 13 using the holding means, unemployment, and extraction means provided in this embodiment, and then the bearing 10 is moved to the low-speed shaft 5. The operation of removing from the same will be described in the same manner.

  FIG. 7 is a diagram for explaining the usage state of the present embodiment, and shows a state in which the upper lid and the side lid of the case are removed from the speed reducer to which the present embodiment is applied. FIG. 8 shows the usage state of the present embodiment. FIG. 9 is a diagram illustrating a state in which the outer and gears of the bearing have been removed from the speed reducer illustrated in FIG. 7, and FIG. 9 is a diagram illustrating a use state of the present embodiment, and the block illustrated in FIG. FIG. 10 is a diagram illustrating a state in which the reduction gear shown in FIG. 10 is mounted on a low-speed shaft, FIG. 10 is a diagram illustrating a use state of the present embodiment, and a diagram illustrating a state in which the spanner illustrated in FIG. 6 holds the block illustrated in FIG. FIG. 11 is a diagram for explaining a use state of the present embodiment. FIG. 11 is a view showing a state in which the unplugged female screw shown in FIG. 2 is screwed to the male screw of the block shown in FIG. 10, and FIG. It is a figure explaining use condition, and the spanner shown in FIG. FIG. 13 is a diagram showing a state in which the extraction means provided in the present embodiment is attached to the unemployment, and FIG. 13 is a diagram showing a state in which the bearing, block, unemployment, and extraction means are removed from the reduction gear shown in FIG. It is.

  In this embodiment, the upper lid 2d and the side lid 2e are removed from the case main body 2c of the case 2B as shown in FIG. 7, and the outer 9a is attached to the case main body as shown in FIG. 8 using a pliers or a claw-like tool (not shown). Remove from 2c. Then, as shown in FIG. 9, the divided bodies 11A and 11B of the block 11 are inserted into the inside from the upper opening of the case main body 2c, and the outer periphery of the low speed shaft 5 at the inner peripheral surface 11d so as to be sandwiched from both sides of the low speed shaft 5 Are engaged so that the recess 11h of the block 11 is brought into contact with the inner 9c, and the inside of the collar 11f of the block 11 is engaged with the conical roller 9b.

  Next, as shown in FIG. 10, the spanner 13 is inserted from the upper opening of the case body 2 c to the inside, and the opening of the spanner 13 is fitted to the convex portion 11 g of the block 11 to hold the divided bodies 11 </ b> A and 11 </ b> B. . In this state, as shown in FIG. 11, the inner 9c and the conical roller 9b are enclosed inside the unemployment 12, and the collar 12f of the unemployment 12 is removed from the gap between the case main body 2c and the conical roller 9b. The female screw 12d1 formed on the inner peripheral surface 12d of the unemployment 12 is screwed into the male screw 11c1 formed on the outer peripheral surface 11c of the block 11. Thereby, since the block 11, the unemployment 12, the inner 9c, and the conical roller 9b are fixed integrally, the spanner 13 is removed from the divided bodies 11A and 11B.

  Next, as shown in FIG. 12, the four screw rods 14 are respectively screwed into the four female screw hole portions 12 e of the unplugged 12, and the four screw rods 14 are attached to the plate 15 integrated with the hydraulic ram 17. And a pusher 16 is interposed between the hydraulic ram 17 and the low speed shaft 5. Then, four nuts 17a are fastened to the respective screw rods 14 from the tips of the four screw rods 14 to fix the hydraulic rams 17, and the pushers 16 are extended by operating the hydraulic rams 17 as shown in FIG. The block 11, the unloader 12, the inner 9 c, and the conical roller 9 b that are integrally fixed in this manner are moved in the axial direction of the low-speed shaft 5 to be extracted from the low-speed shaft 5, and the bearing 9 is removed from the low-speed shaft 5.

  Similarly, the upper lid 2d and the side lid 2f are removed from the case main body 2c of the case 2B as shown in FIG. 7, and the outer 10a is removed from the case main body 2c as shown in FIG. 8 using a pliers or a claw-like tool (not shown). Remove. Then, as shown in FIG. 9, the divided bodies 11A and 11B of the block 11 are inserted into the inside from the upper opening of the case main body 2c, and the outer periphery of the low speed shaft 5 at the inner peripheral surface 11d so as to be sandwiched from both sides of the low speed shaft 5 Are engaged so that the recess 11h of the block 11 is brought into contact with the inner 10c, and the inside of the flange 11f of the block 11 is engaged with the conical roller 10b.

  Next, as shown in FIG. 10, the spanner 13 is inserted from the upper opening of the case body 2 c to the inside, and the opening of the spanner 13 is fitted to the convex portion 11 g of the block 11 to hold the divided bodies 11 </ b> A and 11 </ b> B. . In this state, as shown in FIG. 11, the inner 10c and the conical roller 10b are enclosed inside the unemployment 12, and the collar 12f of the unemployment 12 is removed from the gap between the case main body 2c and the conical roller 10b. The female screw 12d1 formed on the inner peripheral surface 12d of the unemployment 12 is screwed into the male screw 11c1 formed on the outer peripheral surface 11c of the block 11. Thereby, since the block 11, the unemployment 12, the inner 10c, and the conical roller 10b are fixed integrally, the spanner 13 is removed from the divided bodies 11A and 11B.

  Next, in the same manner as when the bearing 9 is removed from the low-speed shaft 5, the four screw rods 14 are respectively screwed into the four female screw hole portions 12 e of the unemployed 12, and the plate integrated with the hydraulic ram 17. The four screw rods 14 are inserted into 15 and a pusher 16 is interposed between the hydraulic ram 17 and the low speed shaft 5. Then, the four nuts 17a are fastened to the respective screw rods 14 from the tips of the four screw rods 14 to fix the hydraulic rams 17, and the pushers 16 are extended by operating the hydraulic rams 17 to be fixed integrally. The block 11, the unloader 12, the inner 10 c, and the conical roller 10 b are moved in the axial direction of the low speed shaft 5 to be extracted from the low speed shaft 5, and the bearing 10 is removed from the low speed shaft 5.

  According to this embodiment configured as described above, the split members 11A and 11B are brought into contact with the inner 9c and the conical roller 9b by the spanner 13 as shown in FIG. The collar 12f was inserted into the case body 2c through the gap between the case body 2c and the conical roller 9b, and the female screw 12d1 formed on the inner peripheral surface 12d of the unplugged 12 was formed on the outer peripheral surface 11c of the block 11. By screwing into the male screw 11c1, the block 11, the removal 12, the inner 9c, and the conical roller 9b can be fixed integrally. Then, the fixed block 11, unplugged 12, inner 9c, and conical roller 9b are integrally extracted from the low speed shaft 5 by the hydraulic ram 17 as shown in FIG. Can be easily removed from the low-speed shaft 5 and the case 2B even if the inner 9c and the conical roller 9b are inserted into the case 2B.

  Similarly, as shown in FIG. 11, in the state where the split bodies 11A and 11B are held in contact with the inner 10c and the conical roller 10b by the spanner 13, the collar 12f of the retired 12 is connected to the case main body 2c and the conical roller. 10b is inserted into the case body 2c through a gap between the female screw 12b and the female screw 12d1 formed on the inner peripheral surface 12d of the unplug 12 is screwed into the male screw 11c1 formed on the outer peripheral surface 11c of the block 11. The block 11, the unemployment 12, the inner 10c, and the conical roller 10b can be fixed integrally. The fixed block 11, unplugged 12, inner 10 c and conical roller 10 b are integrally extracted from the low speed shaft 5 by the hydraulic ram 17 so that the low speed shaft 5 is inserted into the case 2 </ b> B. However, the inner 10c and the conical roller 10b can be easily detached from the low speed shaft 5 and the case 2B. As described above, since the bearings 9 and 10 can be easily detached from the low-speed shaft 5 even when the low-speed shaft 5 is inserted into the case 2B, the cost for replacing the bearings 9 and 10 can be suppressed, and the economy can be reduced. Excellent in properties.

  Moreover, this embodiment uses the spanner 13 as a holding means when fixing the divided bodies 11A and 11B of the block 11 to the inner 9c and the conical roller 9b, or the inner 10c and the conical roller 10b. This improves the working efficiency. Moreover, since the spanner 13 can be easily removed from the state in which the divided bodies 11A and 11B of the block 11 are sandwiched, high convenience can be ensured.

  Furthermore, the female screw of the unemployment 12 with the screw rod 14 removed in the state where the block 11, unemployment 12, inner 9c, and conical roller 9b, or the block 11, unemployment 12, inner 10c, and conical roller 10b are fixed integrally. By screwing into the screw hole portion 12e, the hydraulic ram 17 integrated with the plate 15 can be quickly attached to the unemployment 12 by the nut 17a. Then, the pusher 16 is extended by the hydraulic ram 17 to displace the screw rod 14, so that the inner shaft 9c and the conical roller 9b or the inner roller 10c and the conical roller 10b are moved to the low-speed shaft 5 and the case 2B without damaging the low-speed shaft 5. Can be removed smoothly.

  In the above-described embodiment, the case where the four female screw hole portions 12e of the unemployment 12 are provided so as to penetrate therethrough is not limited to this case. The outer surface of the hiring 12 may be formed to have a recess on the lower surface 12b. The unemployment 12 is not limited to having four female screw holes 12e, but may have one to three, or five or more female screw holes 12e.

  Moreover, although this embodiment demonstrated the case where a rotating shaft consisted of the low speed side low speed axis | shaft 5, it is not restricted to this case, For example, a rotating shaft may consist of a high speed side high speed axis.

2,22 Reducer 2A, 2B Case 2a Upper case 2b Lower case 2c Case body 2d Upper lid 2e, 2f Side lid 5 Low speed shaft (rotating shaft)
6,7,8 Gear 9,10 Bearing 9a, 10a Outer 9b, 10b Conical roller (roller)
9c, 10c Inner 11 block 11A, 11B Divided bodies 11a, 12a Upper surface 11b, 12b Lower surface 11c Outer peripheral surface 11c1 Male screw 11d, 12d Inner peripheral surface 11f, 12f Collar 11g Convex portion 11h Concave 12 Unengaged 12d1 Female screw 12e Female screw 12e Part 13 Spanner (holding means)
14 Screw rod (extraction means)
15 Plate 16 Pusher 17 Hydraulic ram (Extraction means)
17a nut

Claims (2)

A gear that decelerates and outputs the rotational speed of a motor that circulates and moves the steps connected endlessly, a rotating shaft that is fitted with the gear and rotated by the output of the gear, and the rotating shaft is inserted therein. A case, and a bearing provided on the case and rotatably supporting the rotating shaft. The bearing is provided on the inner side with respect to the outer attached to the case, and contacts the rotating shaft. A bearing of a passenger conveyor speed reducer applied to a speed reducer of a passenger conveyor having an inner contact and a roller interposed rotatably between the outer and the inner, wherein the bearing is extracted from the rotating shaft and the case In unemployment equipment,
An annular block which is formed so as to be separable, is inserted into the case, and is attached to the rotary shaft so as to fit the outer periphery of the rotary shaft on the inner peripheral surface and abuts against the inner and the roller When,
Holding means for integrally holding the annular block;
The outer is inserted into the case through a gap between the case and the roller formed by removing the outer from the case, and the inner peripheral surface engages with the outer peripheral surface of the block;
The block, the unemployment, the inner, and the extraction means for integrally extracting the roller from the rotating shaft,
The block has a male screw formed on the outer peripheral surface,
The unemployment is
A bearing unloading device for a passenger conveyor speed reducer, comprising a female screw formed on the inner peripheral surface and screwed into the male screw of the block. In the passenger unloader apparatus of the passenger conveyor speed reducer according to claim 1,
The holding means comprises a spanner that holds the block.
The unemployment has a female screw hole formed on the outer surface,
The sampling means is
A screw rod that is screwed into the female screw hole portion of the unemployed and arranged parallel to the rotation shaft;
A bearing unloader for a passenger conveyor speed reducer, comprising a hydraulic ram for displacing the screw rod.

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