JP2017052610A - Replacement method of hydraulic sealed component of hydraulic elevator and replacement support tool of hydraulic sealed component of hydraulic elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable replacement of a hydraulic sealed component without using a chain block in maintenance of a hydraulic elevator.SOLUTION: In a replacement method of a packing 58 or the like as a hydraulic sealed component in a hydraulic elevator 10, a support jack base and a support jack as replacement support tools 80L, 80R are fitted to plunger rails 24L, 24R. Then, fixing of a fixed part is released, an upper end side of the support jack is raised to separate a plunger 22 and a slide base 30, hydraulic sealed components related to a cylinder 20 and the plunger 22 are replaced, and return work is performed after the replacement. After a car 46 moves to a predetermined work position, the position of the car is fixed by a safety device. The replacement work is performed while a maintenance worker climbs onto a maintenance work space 48 on a ceiling surface of the car 46.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for exchanging hydraulic sealing parts of a hydraulic elevator and an exchange support tool used in the method.

  A hydraulic elevator has a counterwheel, which is a pulley, placed in the middle of the main rope, one end of which is fixed to the pit floor in the hoistway and the other end connected to the car, and the return wheel is moved up and down by a hydraulic actuator. Lift the car up and down. As the hydraulic actuator, a plunger that is slidably moved by a supply hydraulic pressure in a cylinder installed perpendicular to the pit floor of the hoistway is used, and the return wheel is rotatably held on the upper end side of the plunger.

  In the hydraulic actuator, a hydraulic sealing part such as a packing or a seal ring is provided on a sliding surface between the cylinder and the plunger to prevent leakage of hydraulic oil. Since these hydraulic sealing parts wear and get tired after long-term use, it is necessary to replace them appropriately.

  Patent Document 1 states that, in a hydraulic elevator, in order to replace a hydraulic sealing part of a hydraulic actuator, conventionally, a return wheel mounting base fixed to the upper end side of the plunger is hung by a chain block and removed from the plunger. ing.

  Patent Document 2 describes that a work table is attached to the outer circumference of a cylinder of a hydraulic actuator in a hydraulic elevator packing replacement operation.

JP-A-11-11829 JP 2000-177944 A

  In order to replace the hydraulic sealing parts in the hydraulic elevator, it is time consuming to suspend the part of the return wheel with the chain block.

  An object of the present invention is to provide a method for exchanging hydraulic sealing parts of a hydraulic elevator capable of exchanging hydraulic sealing parts without using a chain block, and an exchange support tool used therefor.

  The method for exchanging hydraulic sealing parts of a hydraulic elevator according to the present invention includes a plunger that is moved by a supply hydraulic pressure in a cylinder that is disposed perpendicular to the bottom floor of the hoistway, and that extends vertically in the hoistway. A plunger rail that is guided by the plunger rail, moves up and down in the hoistway, a fixed portion that fixes the plunger and the slide base, a return wheel that is rotatably held by the slide base, and a return wheel Replacement of hydraulically sealed components in a hydraulic elevator that includes a main rope that is suspended and fixed at the bottom floor of the hoistway and connected at the other end to the car and moves the plunger up and down with respect to the cylinder. The method is to attach the support jack base to the plunger rail, place the support jack on the support jack base, release the fixing part, and raise the upper end side of the support jack. The plunger and sliding boards separated Te, replace the hydraulic sealing components related cylinder and plunger, and performs restoring work after exchange.

  In the method for replacing hydraulic sealing parts of a hydraulic elevator according to the present invention, the plunger is lowered to a predetermined height with respect to the cylinder, the car is moved to a predetermined working position, the position of the car is fixed by a safety device, and the supply hydraulic pressure The main rope is bent by lowering the plunger to the lowest point position with respect to the cylinder, and the fixed part is released after the slide base is supported by the upper end of the support jack, and within the main rope bending range. Thus, it is preferable that the upper end side of the support jack is raised to provide a predetermined working gap between the plunger and the slide base.

  In the method for replacing a hydraulic sealing part of a hydraulic elevator according to the present invention, the hydraulic elevator has left and right plunger rails arranged on the left and right sides of the plunger, and the support jack base supports the left and right plunger rails on the left and right sides. It is preferable that the support jacks are attached as jack stands, and the support jacks are arranged as left and right support jacks on the left and right support jack stands, respectively, and the upper end sides of the left and right support jacks are moved in the vertical direction in synchronization.

  Further, in the method for replacing the hydraulic sealing parts of the hydraulic elevator according to the present invention, the hydraulic elevator is provided with a waste oil receiver on the lower end side of the plunger rail, and the waste oil receiver is removed and supported using the waste oil receiver mounting hole. It is preferable to attach a jack stand.

  An exchanging support tool for hydraulic sealing parts of a hydraulic elevator according to the present invention is a plunger that moves by a supply hydraulic pressure in a cylinder that is arranged perpendicular to the bottom floor of the hoistway, and that extends vertically in the hoistway. Plunger rail, sliding base that is guided by the plunger rail and moves up and down in the hoistway, a fixed portion that fixes the plunger and the sliding base, a return wheel that is rotatably held by the slide base, and a return wheel Of a hydraulic sealing part in a hydraulic elevator that includes a main rope suspended at one end and fixed to the floor of the hoistway and connected to the car at the other end, and moving the plunger up and down relative to the cylinder. A fixing support tool having a support jack base having a mounting portion to be attached to the plunger rail and an inner diameter hole in which a female screw is engraved and fixed to the support jack base. And characterized in that it and a support jack comprising a screw shaft having an upper end side of cradle facing the sliding base has a male screw portion mutually biting into the female screw of the stationary sleeve.

  In the hydraulic elevator parts replacement support tool according to the present invention, the hydraulic elevator has left and right plunger rails arranged on both left and right sides of the plunger, and the support jack base corresponds to each of the left and right plunger rails. Preferably, the support jack is a left / right support jack corresponding to each of the left / right support jack tables.

  In the method for exchanging hydraulic sealing parts of a hydraulic elevator according to the present invention, a support jack base is attached to a plunger rail, a support jack is disposed thereon, and the upper end side of the support jack is raised to support the slide base. By using a support jack attached to the plunger rail instead of the chain block, the hydraulic sealing part can be replaced.

  Further, in the method for replacing the hydraulic sealing parts of the hydraulic elevator according to the present invention, a car is used as a place where the operator performs the replacement work. The car is easy to move to a predetermined work position. Then, the plunger is lowered to a predetermined height, the car is fixed at a predetermined work position, and then the plunger is lowered to the lowest position to bend the main rope. Then, by raising the upper end side of the support jack within the bending range of the main rope, a predetermined working gap can be made between the plunger and the slide base, and the replacement work becomes easy.

  Further, in the method for exchanging hydraulic sealing parts of the hydraulic elevator according to the present invention, the plunger rail, the support jack base, and the support jack are arranged in pairs on the left and right sides of the plunger, and the upper end sides of the left and right support jacks are synchronized. To move up and down. Thereby, raising / lowering of a plunger and support of a slide stand are performed with good balance of right and left.

  In the hydraulic elevator replacement method for a hydraulic elevator part according to the present invention, since the hydraulic elevator has a waste oil receiver on the lower end side of the plunger rail, the waste oil receiver is removed and supported using the waste oil receiver mounting hole. Install the jack stand. There is no need to provide special mounting holes. When the replacement work is completed, the waste oil receiver is returned to the original position by the return work.

  An exchange support tool for hydraulic sealing parts of a hydraulic elevator according to the present invention includes a support jack base and a support jack. These are smaller than chain blocks and can be easily transported by hand.

  In the hydraulic elevator component replacement support tool according to the present invention, the plunger rail, the support jack base, and the support jack are arranged in pairs on the left and right sides of the plunger. By using the left and right support jacks, replacement support for moving the slide base with a good balance between the left and right becomes easy.

In a hydraulic elevator, it is a figure which shows application of the replacement | exchange method of the hydraulic sealing components of the hydraulic elevator of embodiment which concerns on this invention. It is a flowchart which shows the procedure of the replacement | exchange method of the hydraulic sealing part of the hydraulic elevator of embodiment which concerns on this invention. It is a block diagram of the hydraulic elevator before a waste oil receiver is removed in the procedure of FIG. It is a figure which shows the relationship which a waste oil receiver is removed from the state of FIG. 3, and arrange | positions a support jack stand and a support jack instead. It is a block diagram of the exchange assistance tool of the hydraulic sealing part of the hydraulic elevator of embodiment which concerns on this invention. 5A and 5B are a front view and a side view, respectively, of the support jack base, and FIGS. 5C and 5D are views showing a fixing sleeve and a screw shaft of the support jack, respectively. ) Is a diagram showing an operating means used for operating a support jack of the replacement support tool. It is a figure which shows the state in which the support jack stand was attached and the support jack was arrange | positioned among the procedures of FIG. It is a figure which shows the state which isolate | separated the plunger and the slide stand among the procedures of FIG. 2, and opened the predetermined | prescribed clearance gap for work. It is a figure which shows the state corresponding to FIG. 6 when a chain block is used with a prior art. It is a figure which shows the state corresponding to FIG. 7 when a chain block is used with a prior art.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. Below, the same code | symbol is attached | subjected to the same element in all the drawings, and the overlapping description is abbreviate | omitted.

  FIG. 1 is a configuration diagram of a hydraulic elevator 10 in a state where hydraulic sealing parts are being replaced. First, the basic configuration of the hydraulic elevator 10 will be described, and then the replacement work of the hydraulic sealing parts will be described.

  The hydraulic elevator 10 is a passenger transport device that places a passenger on a car 46 and raises and lowers the car 46 in the hoistway 12 in response to the request of the passenger, similarly to the hoisting machine elevator. The hoistway 12 is a space extending vertically in the building, and the bottom surface is a pit 14. FIG. 1 shows a landing floor 16 on the first floor, a landing floor 17 on the second floor 17 and a landing floor 18 on the third floor in the building. The upper floor side of the 4th floor or higher is not shown.

  In FIG. 1, three directions orthogonal to each other indicate a vertical direction of the hoistway 12, a horizontal direction perpendicular to the vertical direction, and a width direction orthogonal to the vertical direction and the horizontal direction. In the vertical direction, the upper floor side of the hoistway 12 is the upper side, and the lower floor side is the lower side. In the left-right direction, in the example of FIG. 1, the landing floor side on the left side of the page is the left side, and the opposite side is the right side. The width direction is a direction along the direction in which the car door opens and closes. In the following, the upper end and the lower end are the upper side end and the lower side end, and the rising and lowering indicate the upward movement and the downward movement. In FIG. 1 and subsequent figures, the car 46 and the plunger 22 are arranged side by side in the left-right direction. However, depending on the specifications of the hydraulic elevator 10, the car 46 and the plunger 22 may be arranged side by side in the width direction.

  The hydraulic elevator 10 uses a hydraulic actuator as a drive source for raising and lowering the car 46 in the hoistway 12. As the hydraulic actuator, a plunger 22 that slides and moves in the cylinder 20 by the supplied hydraulic pressure is used.

  The cylinder 20 is a cylindrical member disposed perpendicularly to the floor of the pit 14 that is the bottom surface of the hoistway 12, and has a precisely processed inner wall surface.

  The plunger 22 is a shaft-like member having an outer peripheral surface precisely processed corresponding to the inner wall surface of the cylinder 20, and slides along the inner wall surface of the cylinder 20. The movement of the plunger 22 relative to the cylinder 20 is driven by a hydraulic drive unit (not shown). When the supply hydraulic pressure = 0, the plunger 22 settles to the lowest point of the movable range by the external load applied to the upper end side of the plunger 22 and the own weight of the plunger 22. When the supply hydraulic pressure increases or decreases by a value larger than zero, it is driven to move in the vertical direction according to the difference between the thrust of the pressure receiving surface of the plunger 22 multiplied by the supply hydraulic pressure and (external load + dead weight). Is done.

  The plunger rails 24 </ b> L and 24 </ b> R are arranged so as to extend in the vertical direction in the hoistway 12 and are guide rails for guiding the vertical movement of the plunger 22. The plunger rails 24 </ b> L and 24 </ b> R are symmetrically disposed on the left and right sides with respect to the central axis of the plunger 22. The plunger rails 24L and 24R are fixed to the inner wall surface of the hoistway 12 by angle members for fixing the plunger rail (not shown) (see angle members 26L and 26R in FIG. 8).

  The plunger 22 is guided by the plunger rails 24L and 24R via the slide base 30 and moves in the vertical direction. The slide table 30 is a substantially T-shaped member, and is a sliding portion in which both ends of left and right arm portions, which are portions extending in the left-right direction in the substantially T-shaped, slide with the plunger rails 24L and 24R. A column portion which is a portion extending downward in the substantially T-shape is fixed to the upper end side of the plunger 22 by a fixing portion (see the fixing portion 62 in FIG. 3) removed in FIG. 1. By this fixing, the movement of the plunger 22 in the vertical direction becomes the movement of the slide base 30 guided by the plunger rails 24L and 24R. In FIG. 1, the fixing portion is removed for exchanging the hydraulic sealing part, and a predetermined working gap S is provided between the plunger 22 and the slide base 30.

  The return wheel 40 is a pulley that is rotatably held by the slide base 30 and on which the main rope 42 is suspended. The return wheel 40 moves up and down integrally with the slide table 30 when the slide table 30 moves up and down along the plunger rails 24L and 24R. In a state in which the plunger 22 and the slide base 30 are fixed by the fixing portion, the return wheel 40 moves in the vertical direction integrally with the vertical movement of the plunger 22.

  The main rope 42 is suspended from the return wheel 40, one end is fixed to the floor of the pit 14 that is the bottom surface of the hoistway 12, and the other end is connected to the car 46. Therefore, when the return wheel 40 moves in the up-down direction due to the vertical movement of the plunger 22, the car 46 moves up and down in the hoistway 12 with a movement amount corresponding to twice the vertical movement amount of the return wheel 40. .

  The landing floors 16, 17 and 18 on each floor are provided with a landing door and a car call button on the wall surface on the hoistway 12 side. The car 46 is a passenger carrying car that has car doors on the landing floors 16, 17, and 18 of each floor and moves passengers up and down in the hoistway 12. A destination floor registration button is provided inside the car 46. Above the ceiling surface of the car 46 is a maintenance work space 48 provided with an appropriate protective fence.

  When a passenger presses a car call button provided on the landing floors 16, 17 and 18 of each floor, an operation control device (not shown) detects it and moves the car 46 toward the landing floor in the hoistway 12. Move up and down. The elevator car 46 is moved up and down by hydraulic pressure control for the plunger 22. When the car 46 reaches the landing floor where the car call button is pressed, the car door and the landing door are opened, and passengers can get on the car 46. When the passenger presses the button corresponding to the desired landing floor of the destination floor registration button in the car 46, the operation control device detects this, closes the landing door and the car door, and takes the board by controlling the hydraulic pressure supplied to the plunger 22. Raise and lower the car 46 toward the desired landing floor. In this way, operation control is performed.

  The above is the basic configuration of the hydraulic elevator 10. Next, replacement work of the hydraulic sealing part will be described.

  In the hydraulic actuator used in the hydraulic elevator 10, the sliding surface between the cylinder 20 and the plunger 22 is provided with a hydraulic sealing part such as a packing or a seal ring for preventing leakage of hydraulic oil (note that the hydraulic pressure shown in FIG. 3). Sealing component 50) is provided. These hydraulic sealing parts are worn out and fatigued by long-term use, and need to be replaced as appropriate.

  In order to perform maintenance work for exchanging hydraulic sealing parts in the hydraulic elevator 10, the plunger 22 and the slide base 30 are separated, and the slide base 30 is moved upward with respect to the plunger 22 using the replacement support tools 80 </ b> L and 80 </ b> R. And a predetermined working gap S is made. The position of the car 46 is set to a predetermined work position suitable for the maintenance worker 8 to go up to the maintenance work space 48 and perform replacement work of the hydraulic sealing parts. FIG. 1 shows a state where the maintenance worker 8 goes up to the maintenance work space 48 of the car 46 and holds the packing 58 which is a hydraulic seal part as a maintenance work for exchanging the hydraulic seal part.

  The procedure of the method for replacing the hydraulic sealing parts of the hydraulic elevator and the replacement support tools 80L and 80R will be described in detail with reference to FIGS.

  FIG. 2 is a flowchart showing the procedure of the method for replacing the hydraulic sealing parts of the hydraulic elevator. In order to replace the hydraulic sealing parts, the operation of the hydraulic elevator 10 is changed from the normal operation mode to the maintenance mode. In the maintenance mode, an operation control device (not shown) invalidates operations by passengers of the car call button and the destination floor registration button, and performs supply hydraulic pressure control and the like according to an operation command input by the maintenance worker 8.

  The first procedure for exchanging the hydraulic sealing parts is the mounting of the support jack base constituting the exchange support tools 80L and 80R to the plunger rails 24L and 24R. Since the hydraulic elevator 10 has two plunger rails 24L and 24R, two replacement support tools 80L and 80R are used. In some cases, one replacement support tool may be used.

  In order to attach the support jack bases to the plunger rails 24L, 24R, appropriate mounting holes are provided in the plunger rails 24L, 24R, respectively, and the support jack bases are attached to the plunger rails 24L, 24L, 24N by means of mounting means such as bolts and nuts. Fix to 24R. When appropriate holes are provided in the plunger rails 24L and 24R in advance, the support jack base can be fixed to the plunger rails 24L and 24R using the holes.

  Since the hydraulic elevator 10 is provided with a waste oil receiver on the lower end side of the plunger rails 24L and 24R as a basic component, a waste oil receiver mounting hole can be used. Therefore, the waste oil receiver is removed, and the support jack base is attached using the waste oil receiver mounting hole (S10). Following this, the support jacks constituting the replacement support tools 80L and 80R are arranged on the support jack base (S12).

  The waste oil receiver will be described with reference to FIG. 3 showing the state of the normal operation mode of the hydraulic elevator 10. The sliding base 30 has left and right arm portions 32 that are portions extending in the left-right direction in the substantially T-shape, and the oilers 60L and 60R are located above the sliding portions that are both ends of the left and right arm portions 32. Mounted on. The lubricators 60L and 60R supply oil for sliding lubrication between the sliding portions of the left and right arm portions 32 of the sliding base 30 and the plunger rails 24L and 24R, respectively. The waste oil receivers 70L and 70R are handle-like containers that receive used waste oil that travels along the side surfaces of the plunger rails 24L and 24R.

  The waste oil pan 70L has a handle-like gripping portion attached to the plunger rail 24L. Bolts 76L and nuts 78L are used for attachment. In order to pass the bolt 76L, the plunger rail 24L is provided with a through hole 72L as a waste oil receiving attachment hole. Correspondingly, a similar through hole (see the through hole 74L in FIG. 4) is provided in the grip portion of the waste oil receiver 70L. A waste oil receiver 70L is attached to the plunger rail 24L using these through holes, bolts 76L and nuts 78L. Similarly, through holes 72R are provided in the plunger rail 24R, and similar through holes are provided in the waste oil receiver 70R. The waste oil receiver 70R is provided in the plunger rail 24R by using these through holes, bolts 76R, and nuts 78R. Mounted.

  A support shaft 34 provided at the center in the left-right direction of the left and right arm portions 32 of the slide base 30 is a shaft that rotatably supports the return wheel 40. The connection portion 38 provided integrally with the lower side of the column portion 36 extending downward in the substantially T-shape of the slide base 30 is a member having a bottomed hole whose inner diameter is slightly larger than the outer diameter of the plunger 22 and is fixed. This is a portion fixed to the plunger 22 by the portion 62.

  The fixed portion 62 includes a fixed shaft 64 and a split pin 66 for preventing the fixed shaft 64 from coming off. The fixed shaft 64 is a shaft having a circular cross section, and the length thereof is longer than that required for disposing the split pin 66 with respect to the outer diameter of the connection portion 38. The connecting portion 38 is provided with a lateral hole through which the fixing shaft 64 constituting the fixing portion 62 passes through the annular wall portion forming the bottomed hole. Correspondingly, a lateral hole through which the fixed shaft 64 passes is provided on the upper end side of the plunger 22. The position of the horizontal hole of the connecting portion 38 and the position of the horizontal hole on the upper end side of the plunger 22 are matched, and the fixed shaft 64 is inserted therein. The split pins 66 are inserted into both ends of the fixed shaft 64 protruding from the outer periphery of the connecting portion 38 to prevent the fixed shaft 64 from coming off. In this way, the plunger 22 and the slide base 30 are fixed by the fixing portion 62. The two split pins 66 are removed from the fixed shaft 64 and the fixed shaft 64 is removed from the horizontal hole of the connecting portion 38 and the horizontal hole of the plunger 22 to release the fixed state.

  FIG. 3 shows an arrangement of the packings 52 and 54 and the seal ring 56 as the hydraulic sealing part 50. When the cylinder 20 is formed by arranging and connecting a plurality of annular members in the vertical direction, the packings 52 and 54 are sandwiched between adjacent annular members, and hydraulic oil leaks from the gaps between the adjacent annular members. This is an annular thin plate that prevents this. The seal ring 56 is fitted in a disposition groove provided on the inner wall surface of the cylinder 20, so that hydraulic oil leaks to the upper end side of the plunger 22 when the inner wall surface of the cylinder 20 and the outer peripheral surface of the plunger 22 slide. It is a ring-shaped member to prevent. In some cases, an arrangement groove may be provided on the outer peripheral surface of the plunger 22 and the seal ring 56 may be fitted therein. The arrangement of the packings 52 and 54 and the seal ring 56 in FIG. 3 is an example, and other arrangements may be used. The number of packings may be other than 2, and the number of seal rings may be 2 or more.

  FIG. 4 is a diagram illustrating a relationship in which the waste oil receivers 70L and 70R are removed from the state of FIG. 3 and the replacement support tools 80L and 80R are attached using the through holes 72L and 72R of the plunger rails 24L and 24R. Here, the waste oil receivers 70L and 70R are the same, and the replacement support tools 80L and 80R are also the same. These are merely different in the way of mounting to the plunger rails 24L and 24R. Next, the waste oil receiver 70L and the replacement support tool 80L will be described.

  FIG. 4A is an exploded view in which the waste oil receiver 70L is removed from the plunger rail 24L. When the nut 78L is removed from the bolt 76L that attaches the waste oil receiver 70L to the plunger rail 24L, the waste oil receiver 70L and the plunger rail 24L are disassembled. Since the bolt 76L is passed through the through hole 72L provided in the plunger rail 24L and the through hole 74L provided in the waste oil receiver 70L, the through hole 72L of the plunger rail 24L can be used for other purposes by disassembly. Mounting holes.

  FIG. 4B is a (BB) cross-sectional view of the plunger rail 24L. The (BB) cross-sectional view is a cross-sectional view that includes the (BB) line passing through the through hole 72L and is cut along the same plane at the height position along the vertical direction. (BB) As shown in the sectional view, the plunger rail 24L is a member having a T-shaped cross section having a flange portion 25L at the center. Since FIG. 3 is a front view, only the through hole 72L is shown, but another through hole 73L is provided symmetrically with the flange portion 25L interposed therebetween. Correspondingly, a through hole 75L is provided in the waste oil receiver 70L in addition to the through hole 74L. Correspondingly, two sets of bolts 76L and nuts 78L are also used.

  FIG. 4C is a configuration diagram of the replacement support tool 80L. The replacement support tool 80L includes a support jack base 82L and a support jack 83L. The support jack 83L includes a fixed sleeve 90L and a screw shaft 100L. An assembly in which the screw shaft 100L is passed through the fixed sleeve 90L is a support jack 83L.

  The support jack stand 82L is a member having a shape in which triangular side walls are provided on both sides of the L-shaped member. FIG. 4D is a (DD) cross-sectional view of the support jack stand 82L. The (DD) cross-sectional view is a cross-sectional view that includes a (DD) line passing through the through hole 84L and is cut along the same height in the vertical direction. The (BB) line of Fig.4 (a) and the (DD) line | wire of FIG.4 (c) have the same height position along an up-down direction. FIG. 4B and FIG. 4D are arranged so that the positions in the width direction are the same. As shown in FIGS. 4B and 4D, the two through holes 84L and 85L provided on one of the L-shaped wall surfaces of the support jack 82L are the two through holes 72L of the plunger rail 24L. , 73L. A through hole 86L provided on the other of the L-shaped wall surfaces is a hole through which the screw shaft 100L passes.

  The two through holes 84L and 85L of the support jack base 82L are aligned with the two through holes 72L and 73L of the plunger rail 24L, and a bolt 76L is passed through each of them, and the support jack base 82L and the plunger rail 24L are sandwiched by nuts 78L. tighten. Thereby, the support jack stand 82L is attached to the plunger rail 24L.

  The fixed sleeve 90L is disposed on the other upper surface of the L-shaped wall surface of the support jack stand 82L. The fixed sleeve 90L is disposed so as to be prevented from rotating with respect to the support jack base 82L. As a detent, the fixed sleeve 90L is fixed to the support jack 82L and integrated. Instead, the lower end portion of the fixed sleeve 90L may have a polygonal shape suitable for rotation prevention, and a polygonal hole may be provided in the support jack stand 82L. For example, the polygonal shape of the lower end portion of the fixed sleeve 90L is fitted into the polygonal hole provided in the support jack stand 82L. Since it is sufficient that the fitting can be prevented from rotating, it can be detachable. According to this method, the fixing sleeve 90L and the support jack stand 82L can be separated from each other, and the transportability of carrying the replacement support tool 80L is improved, but the structure is somewhat complicated. In the following, it is assumed that the support jack base 82L is fixed to the fixed sleeve 90L and integrated.

  FIG. 5 is a diagram showing a support jack base 82L, a fixing sleeve 90L, a screw shaft 100L, and a rechargeable impact wrench 120 which is a support jack operation means, which constitute the exchange support tool 80L. Since the impact wrench 120 is a general one used in other maintenance work, it is not necessary to prepare it specifically for the replacement support tool 80L.

  FIGS. 5A and 5B are views showing the support jack stand 82L. (A) is the figure seen from the right side of the left-right direction, (b) is a front view similar to FIG. 1, FIG. Since the content of the support jack stand 82L has been described with reference to FIG. 4B, a detailed description thereof will be omitted.

  FIG. 5C is a cross-sectional view of the fixed sleeve 90L. The fixing sleeve 90L includes a sleeve main body 92L and a lower end fixing portion 98L provided integrally with the lower end portion of the sleeve main body 92L. The lower end fixing portion 98L is an annular member used to increase the fixing area when the fixing sleeve 90L is fixed to the support jack base 82L. The sleeve main body 92L has a female screw hole 94L on the upper side, and a hollow hole 96L having an inner diameter larger than the valley diameter which is the maximum diameter of the female screw hole 94L on the lower side of the female screw hole 94L.

  The length of the female screw hole 94L is set to a length that can ensure sufficient engagement with the male screw portion 102L of the screw shaft 100L. For example, the length is set to about 5 to 10 pitches of the female thread. Since the length of the hollow hole 96L determines the moving stroke of the screw shaft 100L, it is set equal to or longer than the length of the male thread portion 102L of the screw shaft 100L. The fixing sleeve 90L is arranged so that the position of the hollow hole 96L matches the position of the through hole 86L of the support jack base 82L. The inner diameter of the through hole 86L of the support jack base 82L is larger than the inner diameter of the hollow hole 96L so that the screw shaft 100L passes even if the position of the hollow hole 96L and the position of the through hole 86L of the support jack base 82L are slightly shifted. Is set.

  FIG. 5D is a diagram illustrating the screw shaft 100L, two components provided at the upper end portion of the screw shaft 100L, and one component provided at the lower end portion. The screw shaft 100L has a threaded portion 102L on the upper side in the vertical direction, and a round bar portion having an outer diameter smaller than the valley diameter, which is the minimum diameter of the male threaded portion 102L, below the male threaded portion 102L. 104L. A round bar portion 106L having the same outer diameter as the round bar portion 104L is also provided on the upper end side of the male screw portion 102L.

  The length of the male screw portion 102L is set based on the height at which the slide base 30 is raised in order to separate the plunger 22 and the slide base 30 and leave a predetermined working gap S. For example, the predetermined working gap S is about 10 to 20 cm, and the length of the external thread 102L is set to about 15 to 25 cm. The length of the round bar portion 104L is set based on the position on the lower end side of the plunger rail 24L to which the support jack base 82L is attached and the upper end position of the plunger 22 when the plunger 22 is at the lowest point. The specific length varies depending on the specifications and configuration of the hydraulic elevator 10.

  Two components provided at the upper end of the screw shaft 100L are a protective cap 108L and a cradle 110L. The protective cap 108L is a cap member that is detachably placed on the round bar portion 106L on the upper end side of the screw shaft 100L. The cradle 110L is a member that detachably covers the protective cap 108L and supports the slide table 30 by contacting the left lower surface of the left and right arm portions 32 of the slide table 30. In order to reduce the friction between the cradle 110L and the slide base 30, it is preferable to use a material with good lubricity for the cradle 110L. As an example, Teflon (registered trademark) resin is formed into a predetermined shape to form a receiving stand 110L.

  One component provided at the lower end of the screw shaft 100L is a hexagonal cap 112L. The hexagonal cap 112L has a hexagonal shape that is the same as the standard outer shape of a hexagonal nut of an appropriate size, and is a member that is integrated with the round bar portion 104L.

  The support jack 83L is assembled in the following procedure. 5 (c) and 5 (d), the screw shaft 100L is inserted into the hollow hole 96L of the fixing sleeve 90L from the upper end side round bar portion 106L through the through hole 86L of the support jack base 82L. Inserted. Then, the threaded portion 102L is engaged with the female threaded hole 94L of the fixed sleeve 90L. The screw shaft 100L is rotated so that the round bar portion 106L on the upper end side protrudes from the upper end portion of the fixing sleeve 90L, the protective cap 108L is placed on the round bar portion 106L, and the cradle 110L is placed thereon. In this way, a support jack 83L as an assembly is obtained. This assembling work is performed at the exchange work site as a part of the exchange work of the hydraulic sealing parts of the hydraulic elevator 10.

  FIG. 5 (e) is a diagram showing a rechargeable impact wrench 120. The impact wrench 120 is a support jack operation means for rotating the screw shaft 100L with respect to the fixed sleeve 90L to bring the cradle 110L to a predetermined height. The rotating bit 122 at the tip of the impact wrench 120 has a hexagonal fitting hole 124. The rotation bit 122 is rotated by pressing the operation button 126L. As the impact wrench 120, a general-purpose commercial product having an appropriate specification can be used. The rotation bit 122 is detachable from the main body of the impact wrench 120, and is prepared for each different fitting hole. When used in the replacement support tool 80L, the rotating bit 122 for the hexagonal cap 112L of the screw shaft 100L is used. The screw shaft 100L can be rotated through the hexagonal cap 112L fitted in the fitting hole 124. When the impact wrench 120 is used for other maintenance work, the rotating bit 122 is replaced in accordance with the rotating object in the maintenance work.

  In FIG. 5, the support jack 83L constituting the replacement support tool 80L, the fixing sleeve 90L with the hexagonal cap 112L, the screw shaft 100L, the protective cap 108L, the cradle 110L, and a general-purpose that can also be used for other maintenance work. The impact wrench 120 has been described. The support jack base 82R, the fixing sleeve 90R with the hexagonal cap 112R, the screw shaft 100R, the protective cap 108R, and the cradle 110R constituting the replacement support tool 80R are exactly the same as the corresponding elements of the replacement support tool 80L. In one kit box in which the replacement support tools 80L and 80R are combined, two support jack stands 82L, a fixing sleeve 90L with a hexagonal cap 112L, a screw shaft 100L, a protective cap 108L, and two cradle 110L are stored. . In addition to this, two general-purpose impact wrenches 120 are prepared.

  Returning to FIG. 2 again, when the support jack stands 82L and 82R and the support jacks 83L and 83R are attached to the plunger rails 24L and 24R, respectively, the plunger 22 is then lowered to a predetermined height (S14). The predetermined height is a height that is above the lowest point of the movable range of the plunger 22. The predetermined height is made higher than the lowest point when the position of the car 46 is fixed in S16 described later and then the height of the plunger 22 is set to the lowest point in S18. This is because bending is caused and a predetermined working gap S is made by using this bending.

  At the stage where the support jacks 83L, 83R are attached to the plunger rails 24L, 24R, the cradle 110L, 110R protrudes slightly from the upper ends of the fixed sleeves 90L, 90R. When the plunger 22 is lowered to a predetermined height in S <b> 14, the slide base 30 is also lowered, but the receiving bases 110 </ b> L and 110 </ b> R of the support jacks 83 </ b> L and 83 </ b> R do not contact the lower surfaces of the left and right arm portions 32 of the slide base 30.

  Next, the car 46 is moved to a predetermined work position, and the car 46 is fixed at that position using the safety device of the hydraulic elevator 10 (S16). The predetermined work position is the position of the car 46 that is easy to work when the maintenance worker 8 replaces the hydraulic sealing part 50 in the maintenance work space 48 on the ceiling surface of the car 46. In order to move the car 46 to a predetermined work position, the plunger 22 is driven to move.

  Thereafter, the supply hydraulic pressure is set to zero, and the plunger 22 is lowered from the predetermined height state to the lowest point state (S18). Since the position of the car 46 is fixed, the plunger 22 and the slide base 30 are lowered, and the main rope 42 is bent correspondingly.

  The state is shown in FIG. Compared with FIG. 3, instead of the waste oil receivers 70L and 70R, support jack stands 82L and 82R and support jacks 83L and 83R are attached to the plunger rails 24L and 24R as replacement support tools 80L and 80R. Further, the main rope 42 is bent 43 due to the plunger 22 being lowered to the lowest point. The fixing part 62 is in a state in which the connecting part 38 of the slide base 30 and the plunger 22 are fixed, and the receiving bases 110L and 110R of the support jacks 83L and 83R are not in contact with the slide base 30.

  Returning to FIG. 2, next, the slide table 30 is supported by the support jacks 83L and 83R (S20). As described in FIG. 5, the hexagonal caps 112 </ b> L and 112 </ b> R on the lower end side of the screw shafts 100 </ b> L and 100 </ b> R of the support jacks 83 </ b> L and 83 </ b> R are rotated using the two impact wrenches 120. The operation of the two impact wrenches 120 synchronizes the two screw shafts 100L and 100R while observing the movement of the two supports 110L and 110R so that the two supports 110L and 110R move almost synchronously. Rotate. For example, one maintenance worker 8 operates one impact wrench 120 with one hand and operates the other impact wrench 120 with the other hand.

  Since the female screw holes of the fixing sleeves 90L and 90R are in a fixed state, when the male screw portion of the screw shafts 100L and 100R is rotated, the cradle 110L and 110R on the upper end side of the male screw portion move along the vertical direction. . When the cradle 110L, 110R hits the lower surface of the left and right arm portions 32 of the slide base 30, the operation of the two impact wrench 120 is stopped. As a result, the slide table 30 is supported by the support jacks 83L and 83R.

  Next, the plunger 22 and the slide base 30 are separated (S22). In this processing procedure, the fixed state of the plunger 22 and the slide base 30 is released, and thereafter, the slide base 30 is moved upward and a predetermined working gap S between the plunger 22 and the slide base 30 is obtained. And freeing up.

  First, in the fixing portion 62 of FIG. 6, the two split pins 66 are extracted from the fixing shaft 64, and the fixing shaft 64 is extracted from the through hole provided in the connection portion 38 and the plunger 22. Thereby, the fixed state between the plunger 22 and the slide base 30 is released. The state in which the fixing is released is a state in which the connecting portion 38 and the plunger 22 are in contact with each other due to the weight of the slide base 30 and the return wheel 40. However, since the supply oil pressure is set to 0 in S18, the plunger 22 is moved upward. The hydraulic oil between the cylinder 20 and the plunger 22 is not ejected without jumping out to the side.

  Next, the screw shafts 100L and 100R of the support jacks 83L and 83R are rotated using the two impact wrenches 120, and the receiving bases 110L and 110R are kept in contact with the lower surfaces of the left and right arm portions 32 of the sliding base 30. Move upward. When the gap interval between the lower end surface of the connecting portion 38 of the slide base 30 and the upper end surface of the plunger 22 reaches a predetermined working gap S, the operation of the two impact wrenches 120 is stopped. The operations of the two impact wrenches 120 are synchronized in the same manner as described in S20. Thereby, a predetermined working gap S is secured between the plunger 22 and the slide base 30.

  The state is shown in FIG. Compared to FIG. 6, the fixing portion 62 is removed and is not shown. A working gap S is provided between the lower end surface of the connecting portion 38 of the slide base 30 and the upper end surface of the plunger 22. Since the slide base 30 is moved above the upper end surface of the plunger 22, there is no deflection 43 of the main rope 42. The cradle 110L, 110R of the support jack 83L, 83R is in contact with the slide base 30 and supports the slide base 30 so as not to be lowered downward. Since the support jacks 83L and 83R are screw-type jack mechanisms, the support jacks 83L and 83R are not lowered by the weight of the slide base 30 and the return wheel 40.

  Returning to FIG. 2, in the state of FIG. 7, the hydraulic sealing parts are replaced (S24). As shown in FIG. 1, the maintenance worker 8 goes up to the maintenance work space 48 on the ceiling surface of the car 46, picks up the replacement part packing 58, and uses the work gap S to perform the replacement work. .

  When the replacement work of the hydraulic seal part 50 is completed, a return work is performed to return the hydraulic elevator 10 to a state where normal operation control is possible (S26). The return operation is an operation in which the processing procedure from S10 to S22 in FIG. 2 is reversed. When the return operation is completed, the state returns to the state shown in FIG. 3, and the maintenance worker 8 returns the operation of the hydraulic elevator 10 from the maintenance mode to the normal operation mode. As a result, the passenger operation of the car call button and the destination floor registration button becomes effective, and the normal operation state of the hydraulic elevator 10 is obtained.

  FIG. 8 and FIG. 9 are diagrams showing an example of a conventional technique for exchanging hydraulic sealing parts using a chain block for comparison. 8 corresponds to FIG. 6, and FIG. 9 corresponds to FIG. As shown in FIG. 8, in the prior art, the hanging hook 29 of the chain block 28 is hung on the return wheel 40 in order to separate the plunger 22 and the slide base 30. The fixed end of the chain block 28 is fixed at an appropriate position of the hoistway 12. Here, the angle blocks 26 </ b> L and 26 </ b> R that fix the plunger rails 24 </ b> L and 24 </ b> R to the hoistway 12 are used. It fixes to rails 24L and 24R. In FIGS. 1, 3, 6, and 7, the angle members 26L and 26R for fixing the plunger rail are not shown.

  When the plunger 22 and the slide base 30 are separated, the fixing portion 62 is removed, and the chain block 28 is operated to suspend the slide base 30 upward as shown in FIG. Free up.

  Since the chain block 28 has a long chain portion, the entire chain block 28 has a large volume and a large mass. Therefore, it takes time and labor for the transportation process. Further, it takes time to attach the fixed end of the chain block 28 to the angle members 26L and 26R for fixing the plunger rail. When the return wheel 40 is suspended by using one suspension hook 29 of the chain block 28, the slide base 30 may not move smoothly, and it is difficult to adjust the position of the slide base 30 in the vertical direction.

  On the other hand, since the replacement support tools 80L and 80R described in FIG. 5 can be disassembled into a plurality of elements, the overall volume can be reduced and the mass is also small. Therefore, it is possible to carry by hand. In addition, the mounting process of the support jack stands 82L and 82R and the process of moving the sliding base 30 upward can be easily performed by operating the impact wrench 120, so that the processing time is also longer than when the chain block 28 is used. Can be shortened. Further, since the support jacks 83L and 83R are of a screw type, the position of the slide base 30 can be finely adjusted in the vertical direction by operating the impact wrench 120, and the safety of maintenance work can be ensured. Furthermore, since the support jacks 83L and 83R support the left and right ends of the left and right arm portions 32 of the slide table 30, the slide table 30 can be moved smoothly.

  8 Maintenance workers, 10 Hydraulic elevators, 12 hoistways, 14 pits, 16, 17, 18 landing floors, 20 cylinders, 22 plungers, 24L, 24R plunger rails, 25L flanges, 26L, 26R angle members, 28 chains Block, 29 Suspension hook, 30 Sliding base, 32 Left and right arm parts, 34 Support shaft, 36 Column part, 38 Connection part, 40 Return wheel, 42 Main rope, 43 Bending, 46 Car, 48 Maintenance work space, 50 Hydraulic sealing parts, 52, 54, 58 Packing, 56 Seal ring, 60L, 60R Lubricator, 62 Fixed part, 64 Fixed shaft, 66% pin, 70L, 70R Waste oil receiver, 72L, 72R, 73L, 74L, 75L, 84L 85L, 86L Through hole, 76L, 76R Bolt, 78L, 78R Nut, 80L , 80R replacement support tool, 82L, 82R support jack stand, 83L, 83R support jack, 90L, 90R fixed sleeve, 92L sleeve body, 94L female screw hole, 96L hollow hole, 98L bottom end fixing part, 100L, 100R screw shaft, 102L Male thread part, 104L, 106L Round bar part, 108L, 108R Protective cap, 110L, 110R cradle, 112L, 112R Hexagonal cap, 120 Impact wrench, 122 Rotating bit, 124 Fitting hole, 126L Operation button.

Claims (6)

A plunger that moves in a cylinder vertically disposed on the bottom floor of the hoistway by supply hydraulic pressure,
Plunger rail arranged extending in the vertical direction in the hoistway,
A slide that is guided by the plunger rail and moves up and down in the hoistway,
A fixing part for fixing the plunger and the slide base;
A return wheel that is rotatably held on a slide base,
And a main rope suspended on the return wheel and having one end fixed to the bottom floor of the hoistway and the other end connected to the car,
A hydraulic sealing part replacement method in a hydraulic elevator that lifts and lowers a car by moving a plunger relative to a cylinder,
Attach the support jack stand to the plunger rail,
Place the support jack on the support jack stand,
Release the fixing of the fixed part, raise the upper end side of the support jack to separate the plunger and the slide,
Replace hydraulic sealing parts for cylinder and plunger,
A method for replacing a hydraulic sealing part of a hydraulic elevator, wherein the return operation is performed after the replacement. The method for replacing a hydraulic sealing part of a hydraulic elevator according to claim 1,
Lower the plunger to the specified height relative to the cylinder,
Move the car to the designated work position and fix the position of the car with the safety device,
With the supply hydraulic pressure set to zero, lower the plunger to the lowest point position relative to the cylinder, and bend the main rope.
After the slide base is supported on the upper end side of the support jack, the fixing portion is released, and the upper end side of the support jack is raised within the bending range of the main rope, so that a predetermined working gap is provided between the plunger and the slide base. A method for exchanging hydraulic sealing parts of a hydraulic elevator, characterized in that a clearance is provided. In the replacement method of the hydraulic sealing part of the hydraulic elevator according to claim 1 or 2,
The hydraulic elevator has left and right plunger rails arranged on the left and right sides of the plunger,
The support jack base is attached to each of the left and right plunger rails as a left and right support jack base,
Support jacks are arranged as left and right support jacks on each of the left and right support jack stands,
A method for exchanging hydraulic sealing parts of a hydraulic elevator, wherein the upper end sides of the left and right support jacks are moved in the vertical direction in synchronization. The method for replacing a hydraulic sealing part of a hydraulic elevator according to claim 1,
The hydraulic elevator has a waste oil receiver on the lower end side of the plunger rail.
A method for replacing a hydraulic sealing part of a hydraulic elevator, wherein the waste oil receptacle is removed and a support jack base is attached using a waste oil receptacle mounting hole. A plunger that moves in a cylinder vertically disposed on the bottom floor of the hoistway by supply hydraulic pressure,
Plunger rail arranged extending in the vertical direction in the hoistway,
A slide that is guided by the plunger rail and moves up and down in the hoistway,
A fixing part for fixing the plunger and the slide base;
A return wheel that is rotatably held on a slide base,
And a main rope suspended on the return wheel and having one end fixed to the bottom floor of the hoistway and the other end connected to the car,
An exchange support tool for hydraulic sealing parts in a hydraulic elevator that moves a plunger up and down by moving a plunger relative to a cylinder,
A support jack base having a mounting portion to be attached to the plunger rail;
A fixed sleeve having an inner diameter hole in which a female screw is engraved and fixed to a support jack base, and a screw having a male thread portion that meshes with the female screw of the fixed sleeve and having a receiving table facing the sliding base on the upper end side A supporting jack including a shaft;
A support tool for exchanging hydraulic sealing parts of a hydraulic elevator. The replacement support tool for hydraulic sealing parts of the hydraulic elevator according to claim 5,
The hydraulic elevator has left and right plunger rails arranged on the left and right sides of the plunger,
The support jack table is a left and right support jack table corresponding to each of the left and right plunger rails,
The support jack is a left and right support jack corresponding to each of the left and right support jack stands, and is an exchange support tool for hydraulic sealing parts of a hydraulic elevator.

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