JP5250913B2 - lift device - Google Patents

Description

  The present invention relates to an elevating apparatus that is used for evacuating from the upper floor to the lower floor in the event of an earthquake or a fire, and that can also be used as an ordinary elevator.

  Conventionally, various evacuation elevators used for evacuating from the upper floor to the lower floor in the event of an earthquake or fire have been proposed.

  Usually, there is a high possibility of a power failure in the event of an earthquake or fire, so it is not appropriate to use commercial power to drive the evacuation elevator. Therefore, a device driven by a battery or water supply or a device that does not require a drive source is suitable as an elevating elevator.

  For example, a device has been proposed in which two hydraulic cylinders are communicated with a communication pipe and two cages (gondra) are alternately raised and lowered by two hydraulic cylinders (Patent Document 1).

  In the apparatus of Patent Document 1, when a person is placed on one gondola, the cage descends due to the gravity, and at the same time, the other cage that is empty and light rises.

  In addition, a device has been proposed in which a cage and a balance weight are suspended by a wire hung on a fixed pulley, and the cage is moved up and down by a gravity balance thereof (Patent Document 2).

  In the apparatus of Patent Document 2, the balance weight through which the wire penetrates is arranged for each floor, and when the cage is empty, the cage is moved up by lowering the balance weight. When a person gets on the cage and the weight increases, the balance weight is increased via the wire due to the gravity, and the cage is lowered. When the cage descends, the balance weight as a load increases by one each time the cage passes through each floor, thereby adjusting the cage speed and preventing the cage from reaching a dangerous speed.

JP 2003-118951 A JP-A-6-156896

  However, in the apparatus of Patent Document 1, since it is necessary to provide two cages, there is a problem that a large installation space is required. In addition, there is a problem that if a person gets on the two cages at the same time, it does not descend. This can happen during an emergency evacuation.

  Further, in the apparatus of Patent Document 2, it is necessary to provide a balance weight for each floor in order to adjust the cage speed. For this reason, a space for providing a balance weight is required, and as the number of floors increases, the number of balance weights increases and the apparatus becomes complicated.

  Conventionally, there has been no lifting device that operates as a passenger elevator when the commercial power is energized and operates as an evacuation elevator when the commercial power is interrupted.

  The present invention has been made in view of the above-described problems, and it is not necessary to provide two cages, and it is not necessary to provide a balance weight for each floor, and can be installed even in a relatively small space and is simple. An object of the present invention is to provide a lifting device that can easily adjust the speed of a cage with a simple structure.

  It is another object of the present invention to provide an elevating device that operates as a passenger elevator when energized with commercial power and operates as an evacuation elevator during a power outage of commercial power.

An apparatus according to the present invention includes a cage arranged to be able to ascend and descend in a lift passage of a building frame, a wire for suspending the cage, and a plurality of pulleys around which the wire is stretched. and tackle arrangement, the disposed between the movable pulley device and building frame, a hydraulic cylinder rod with raising or lowering of the cage you extending action or contraction operation, the rod side chamber and a head-side chamber of the hydraulic cylinder A communication pipe capable of communicating with the communication pipe, a throttle valve for adjusting a flow rate of the liquid in the communication pipe, a switching valve for switching the communication pipe to be cut off or connected, and the communication pipe A reservoir connected to a passage for adjusting the amount of liquid due to the difference in area between the rod side chamber and the head side chamber, and when a load is not placed on the cage A size that is provided so that the rod is extended or contracted to raise the cage, and when the load is loaded on the cage, the rod can be contracted or extended to lower the cage. And a weighting member that generates the force.

  Preferably, the movable pulley device is provided so as to be movable up and down by one or a plurality of fixed pulleys fixedly attached to the building frame and a guide member with respect to the building frame. A movable beam connected to the rod or head of a cylinder, and one or more movable pulleys attached to the movable beam, wherein the wire has one end connected to the cage and the other end It is also possible to be configured to be connected to the building frame and to be spanned over the fixed pulley and the movable pulley.

  Preferably, the hydraulic cylinder is provided in a vertical posture at a central portion in the width direction of the building frame, and the movable beam is provided in a horizontal posture so as to extend in the width direction of the building frame, and the center thereof. The hydraulic pulley device is provided symmetrically on the left and right sides of the hydraulic cylinder with the hydraulic cylinder interposed therebetween.

  Preferably, the movable beam is provided with a weight attaching portion for attaching a weight, and the weight attached to the movable beam and the weight attaching portion constitutes at least a part of the weight member.

  Preferably, the weight member includes a spring member in a part thereof.

  Further, the rod side chamber and the head side chamber by the communication pipe line are operated so that the rod is extended or contracted in order to operate as a passenger elevator when the commercial power is energized and to operate as an evacuation elevator when the commercial power is interrupted. A fluid pressure unit may be provided for selectively supplying and discharging liquid to and from the rod side chamber and the head side chamber in a state where communication with the head side chamber is interrupted.

  A pressure regulating valve is provided between the rod side chamber or the head side chamber and the hydraulic unit to maintain the hydraulic pressure in the rod side chamber or the head side chamber higher than the hydraulic pressure on the hydraulic unit side. Also good.

  You may provide the accumulator which can deliver a liquid with a gas pressure for supplying a liquid to the said rod side chamber.

  According to the present invention, the cage can be installed even in a relatively small space, and the cage speed can be easily adjusted with a simple configuration.

  In addition, it is possible to provide an elevating device that operates as a passenger elevator when commercial power is supplied and operates as an evacuation elevator when commercial power is interrupted.

It is a perspective view which shows the general view of the building which installed the raising / lowering apparatus of 1st Embodiment. It is a perspective view which shows the frame | skeleton structure of a building frame. It is a perspective view which shows the structure of the principal part of a 1st raising / lowering apparatus. It is a perspective view which shows the structure of a drive device. It is a perspective view which shows the structure of a cage. It is a front view of the raising / lowering device when a cage exists in a lowered position. It is a right view of the raising / lowering apparatus when a cage exists in a lowered position. It is a front view of the raising / lowering device when a cage exists in a raise position. It is a left view of the raising / lowering apparatus when a cage exists in a raise position. It is a left view of the raising / lowering apparatus when a cage exists in a raise position. It is a top view of a raising / lowering apparatus. It is an AA arrow directional cross-sectional view in FIG. It is a perspective view which expands and shows the structure of the vicinity of a movable beam. It is a figure which shows the attachment state to the building frame of a wire. It is a figure which shows the attachment state to the building frame of a fixed pulley. It is a rear view which expands and shows the locking mechanism of a door. FIG. 16 is a left side view of the lock mechanism shown in FIG. 15. It is a figure which shows the example of the hydraulic circuit of the raising / lowering apparatus of 1st Embodiment. It is a figure for demonstrating the raising / lowering operation | movement of the cage by a drive device. It is a flowchart which shows the example of operation | movement of a raising / lowering apparatus. It is a perspective view which shows the general view of the 3 stories building which installed the raising / lowering apparatus. It is a figure which shows the example of the hydraulic circuit of the raising / lowering apparatus of 2nd Embodiment. It is a figure explaining operation | movement of the hydraulic circuit of the raising / lowering apparatus of 2nd Embodiment. It is a figure explaining operation | movement of the hydraulic circuit of the raising / lowering apparatus of 2nd Embodiment. It is a figure explaining operation | movement of the hydraulic circuit of the raising / lowering apparatus of 2nd Embodiment. It is a figure explaining operation | movement of the hydraulic circuit of the raising / lowering apparatus of 2nd Embodiment. It is a figure explaining operation | movement of the hydraulic circuit of the raising / lowering apparatus of 2nd Embodiment. It is a figure explaining operation | movement of the hydraulic circuit of the raising / lowering apparatus of 2nd Embodiment. It is a figure explaining operation | movement of the hydraulic circuit of the raising / lowering apparatus of 2nd Embodiment. It is a figure explaining operation | movement of the hydraulic circuit of the raising / lowering apparatus of 2nd Embodiment. It is a figure explaining operation | movement of the hydraulic circuit of the raising / lowering apparatus of 2nd Embodiment. It is a figure explaining operation | movement of the hydraulic circuit of the raising / lowering apparatus of 2nd Embodiment. It is a figure explaining operation | movement of the hydraulic circuit of the raising / lowering apparatus of 2nd Embodiment. It is a figure explaining operation | movement of the hydraulic circuit of the raising / lowering apparatus of 2nd Embodiment. It is a figure explaining operation | movement of the hydraulic circuit of the raising / lowering apparatus of 2nd Embodiment. It is a figure explaining operation | movement of the hydraulic circuit of the raising / lowering apparatus of 2nd Embodiment. It is a figure explaining operation | movement of the hydraulic circuit of the raising / lowering apparatus of 2nd Embodiment. It is a figure which shows the example of the on-off control state of the valve in each state of the raising / lowering apparatus of 2nd Embodiment. It is a figure which shows the example of the on-off control state of the valve in each state of the raising / lowering apparatus of 2nd Embodiment.

[First Embodiment]
As a first embodiment, a lifting / lowering device (evacuation lifting / lowering device) 1 that can operate even when a commercial power failure occurs will be described.

  In FIG. 1, a two-story building KB is shown. The building KB is, for example, an elderly care facility, a hospital, a residential apartment, or the like. The building KB is provided with a veranda BD and a handrail TS. In contact with the building KB, an evacuation elevator (elevator) 1 for the second floor is installed on the ground.

  Referring also to FIG. 2 and FIGS. 6 to 12, the evacuation lifting apparatus (elevating apparatus) 1 has a vertically long rectangular parallelepiped building frame 11 as a whole.

  The building frame 11 is configured by connecting a large number of frame materials 111, 112, 113 using square pipes made of a metal material or the like. Four guide rails 114, 114... Are provided to be supported by the frame members 111, 112 and guide the up-and-down movement of the cage 13 (see FIG. 12).

  An entrance HG is provided in the second floor portion of the building frame 11 so that people and objects can enter from the veranda BD. The entrance HG is provided with doors 12 (12a, 12b) that can be opened and closed with a double door toward the veranda BD. On the first floor portion of the building frame 11, an exit DG for allowing a person to go outside is provided. The exit DG is not provided with a door, but a door or a fence may be provided.

  Although not shown, a cover made of a metal plate or a synthetic resin plate is attached to the building frame 11 on the outer peripheral surface excluding the entrance HG and the exit DG.

  Referring also to FIG. 3, the inside of the building frame 11 is an elevating path TR, and a cage 13 that can be raised and lowered is arranged in the elevating path TR. A driving device 14 that moves the cage 13 up and down is attached to the upper portion of the building frame 11 via two wires WR.

  The building frame 11 is bolted to the ground via the bracket 111a. Further, it is bolted to the veranda BD via the mounting plate 116. Thereby, the building frame 11 is fixed to the building KB.

  3 and 5, the cage 13 is configured by connecting a frame material using a square pipe made of a metal material or the like, and has a floor surface portion 131 and side surface portions 132 and 132 on both sides thereof.

  The cage 13 is covered with a thin plate (not shown) on the surfaces of the floor portion 131 and the side portions 132 and 132. As such a thin plate, for example, an aluminum alloy checker plate can be used. As a result, a person can safely get on the cage 13.

  Both ends of a frame member 131a provided at the center of the floor surface portion 131 protrude from the floor surface portion 131, and one end of each wire WR is connected thereto. The wire WR is stretched over a plurality of pulleys provided in the movable pulley device 22, and the other end is fixed to the frame material 113 of the ceiling portion of the building frame 11.

  That is, as shown in FIG. 14, the adjustment screw 101 is attached to the frame member 131 a of the cage 13, and one end of the wire WR is connected via the ring-shaped shackle 102. Further, an adjustment screw 104 is attached to the top plate 115a, and the other end of the wire WR is connected via the shackle 103. Such a wire WR is provided in a symmetrical position on the left and right with respect to the central portion of the cage 13, and the cage 13 is suspended by the two wires WR.

  Note that eyebolts, nuts, turnbuckles, and the like are used as the adjusting screws 101, 104. The length of the wire WR is adjusted so that the cage 13 does not hit the floor or the ground when the cage 13 moves to the descending end.

  Moreover, you may provide the impact mitigation apparatus for relieving the impact when the cage 13 should fall by any chance on the lower surface of the cage 13, or the ground corresponding to it.

  As the two wires WR are pulled or loosened at the same speed, the cage 13 moves up and down with the floor portion 131 kept horizontal.

  The wire WR is preferably made of metal, but may be made of synthetic resin or fiber.

  Guide bushes 133, 133,... Are attached to the outside of the side surfaces 132, 132. These guide bushings 133 are slidably fitted into the guide rails 114 to guide the cage 13 to move up and down.

  Referring to FIGS. 3 and 4, drive device 14 includes a hydraulic cylinder 21 and a moving pulley device 22.

  The hydraulic cylinder 21 is a double-acting type including a cylinder tube 211, a piston 211a, a rod 212, a rod cover 213, a head cover 214, and the like, and operates by a liquid such as oil or water. The hydraulic cylinder 21 is attached in a vertical posture so that its head cover 214 is fixed to the frame material 113 or the plate 115a of the ceiling portion of the building frame 11, and the rod 212 extends downward.

  The moving pulley device 22 includes a plurality of fixed pulleys 221 and 222, a moving pulley 223, and a movable beam 224.

  The fixed pulley 221 is fixedly attached to the top plate 115 a fixed to the frame material 113 in the ceiling portion of the building frame 11. In the present embodiment, the number of fixed pulleys 221 is six. That is, a set of three set pulleys is provided at a symmetrical position on the left and right of the top plate 115a, two sets in total.

  In addition to these six pulleys 221, four fixed pulleys 222 for changing the direction of each wire WR are fixedly attached to the top plates 115a and 115b.

  FIG. 15 shows a fixed pulley 222. In FIG. 15, the two holding | maintenance metal fittings 222b which oppose are attached to the top plate 115b with a volt | bolt. A pulley 222a is rotatably supported by the holding metal member 222b via a shaft. Further, a retaining member 222c using a bolt or the like is attached between the holding fittings 222b at a position close to the outer peripheral edge of the pulley 222a so that the wire WR hung on the pulley 222a is not detached.

  The six regular pulleys 221 have the same structure as the regular pulley 222 shown in FIG.

  Referring also to FIG. 13, the movable beam 224 is provided in a horizontal posture so as to extend in the width direction of the building frame 11, and can be moved up and down by being guided by guide members 225 on both sides fixed to the building frame 11. It is. The tip of the rod 212 of the hydraulic cylinder 21 is connected to the movable beam 224 at the center thereof.

  Note that, for example, a floating metal fitting or the like is used for a connecting portion between the tip of the rod 212 and the movable beam 224, and a slight inclination or deviation can be allowed.

  Thus, the hydraulic cylinder 21 is disposed between the building frame 11 and the moving pulley device 22, and the rod 212 is extended or contracted as the cage 13 moves upward or downward.

  Although the movable range of the movable beam 224 is equal to the range of expansion and contraction operation of the hydraulic cylinder 21, a stopper may be provided at an appropriate position of the building frame 11 in order to regulate the movable range of the movable beam 224. .

  The movable pulley 223 is fixedly attached to the movable beam 224. In the present embodiment, the number of the movable pulleys 223 is six. That is, a total of two sets of three groups of moving pulley groups are provided one by one at the left and right symmetrical positions of the movable beam 224.

  The structure of the movable pulley 223 is the same as that of the fixed pulley 222 shown in FIG.

  The movable beam 224 is provided with a weight attaching portion 226 for attaching the weight WT. The weight attaching portion 226 includes a total of four locking rods 227, two at a symmetrical position around the connecting portion of the movable beam 224 with the rod 212.

  The weight WT has a rectangular parallelepiped shape having a predetermined weight, and is attached to the weight attachment portion 226 so that the locking rod 227 is inserted through the two through holes provided in each. All the loads applied to the movable beam 224 including the weight WT become weight members for overcoming the gravity of the empty cage 13 and moving the cage 13 upward.

  In other words, the weight member is provided so that the rod 212 is extended to raise the cage 13 when the load KJ is not placed on the cage 13, and the rod 212 is placed when the load KJ is placed on the cage 13. A force of a magnitude capable of lowering the cage 13 by being contracted is generated.

  The number and size of the weights WT are selected and attached to the weight attaching portion 226 so that the gravity of the weight member has an appropriate relationship with the gravity of the cage 13. In that case, the same number of weights WT are attached to the left and right engaging rods 227 provided in the weight attaching portion 226 so that the left and right are at the same load.

  The shape of the weight WT can be various shapes such as a disk shape, a plate shape, and a block shape in addition to a rectangular parallelepiped shape.

  16 and 17, the doors 12a and 12b are provided with a lock mechanism LK that locks the doors 13a and 12b so that they do not open from the closed state unless the cage 13 reaches the second floor. One lock mechanism LK is provided in each door 12a, 12b at a symmetrical position.

  That is, each door 12a, 12b is formed in a frame shape by connecting door frames 121a, 121b and the like by connecting members 121c and the like, and a thin plate (not shown) is stretched on the surface thereof. Inside the door frame 121b located on the lower side, a lock bracket 122 that forms a slit with the surface of the door frame 121b is attached.

  On the other hand, the substrate 123 is attached to the frame material 113 provided in the horizontal direction at the same height position as the veranda BD. A shaft pin 125 is screwed into the substrate 123, and the lock fitting 124 is supported by the shaft pin 125 so as to be rotatable in a vertical plane.

  The lock fitting 124 is in the form of a band plate, and the length to each end centering on the hole portion supported by the shaft pin 125 is different. That is, the lock fitting 124 has a long part 124a which is the longer side and a short part 124b which is the shorter side. In the free state, the long portion 124a hangs downward due to gravity, and the short portion 124b protrudes upward. In this state, as shown by a two-dot chain line in the figure, the short portion 124b enters the slit of the lock bracket 122, thereby locking the doors 12a and 12b.

  When the lock fitting 124 is in a free state and the door 12 is locked, the cage 13 is not present on the second floor.

  Note that a locking pin 126 is attached to the frame material 113 at the lower side of the shaft pin 125. In the free state of the lock fitting 124, the edge of the long portion 124a abuts against the locking pin 126, so that the lock fitting 124 stops in a slightly inclined posture.

  In the cage 13, a release fitting 127 having a substantially Z-shaped cross section is attached to the frame of the floor portion 131. While the cage 13 moves upward from the first floor to the second floor, the release metal fitting 127 abuts against the long portion 124a of the lock metal 124 in the free state and pushes it up. It becomes a horizontal posture, and the short part 124 b comes out of the slit of the lock bracket 122. This unlocks the doors 12a and 12b.

  As described above, when the cage 13 is not on the second floor, the door 12 is locked by the lock mechanism LK and is not vacant, so that the safety of a person trying to evacuate is achieved. When the cage 13 arrives on the second floor, the lock mechanism LK is automatically released, and a person who wants to evacuate can open the door 12 and get into the cage 13.

  When the cage 13 moves downward, the lock fitting 124 becomes free again, and the door 12 is locked.

  Next, the hydraulic circuit around the hydraulic cylinder 21 will be described.

  In other words, the evacuation elevator 1 is provided with a hydraulic device 15 for controlling the hydraulic cylinder 21. A hydraulic circuit of the hydraulic device 15 is shown in FIG. Oil, water, or other liquid is used as the hydraulic fluid of the hydraulic device 15.

  In FIG. 18, a communication conduit 151 that communicates the rod side chamber RS and the head side chamber HS of the hydraulic cylinder 21 is provided between the ports PT1 and PT2.

  The communication conduit 151 is a conduit provided outside the hydraulic cylinder 21 between the port PT1 and the port PT2. As the communication pipe 151, it is possible to use a flexible hose or tube made of a metal pipe such as a steel pipe or a stainless steel pipe, rubber or synthetic resin, or the like. Further, the communication pipe 151 may be disposed along the cylinder tube 211 of the hydraulic cylinder 21, and a part of the cylinder tube 211, the rod cover 213, or the head cover 214 may be used as the communication pipe 151.

  The communication line 151 includes throttle valves 152 and 153 for adjusting the flow rate of the liquid, a switching valve 154 for switching the communication line 151 to be cut off or connected, and a rod side chamber connected to the communication line 151. A reservoir 155 for adjusting the amount of liquid due to the difference in area between the RS and the head side chamber HS is provided. Check valves 152a and 153a are connected in parallel to the throttle valves 152 and 153, respectively.

  The switching valve 154 is a two-way two-position switching valve. However, it may be a simple on-off valve or a stop valve. In FIG. 18, a manual type is shown as the switching valve 154, but other types of operation methods such as an electromagnetic type, that is, an electromagnetic valve, can be used. The case where it is a solenoid valve will be described.

  When the switching valve 154 is a manual type, a rope is connected to the operation portion of the switching valve 154 so that a person on the cage 13 operates the switching valve 154 by pulling the rope. Can be.

  The reservoir 155 may be a tank that stores a liquid and may have an appropriate lid. A piston that moves as the liquid increases or decreases may be provided. Further, a part of the cylinder tube 211, the rod cover 213, or the head cover 214 may be used as the reservoir 155.

  The hydraulic cylinder 21 is provided with a cushion mechanism that exhibits a cushioning action at the stroke end in the expansion and contraction operation. Therefore, it stops smoothly without generating an impact at each stroke end.

  As can be seen from the hydraulic circuit shown in FIG. 18, the hydraulic device 15 is not provided with a hydraulic pressure source or a power source that positively generates hydraulic pressure. A force acts on the hydraulic cylinder 21 so as to extend and contract the rod 212 due to the raising and lowering operation of the cage 13. adjust.

  That is, when the switching valve 154 is off, that is, when the communication pipe 151 is shut off and the port PT2 is closed, the piston 211a and the rod 212 of the hydraulic cylinder 21 do not move. In particular, the piston 211a and the rod 212 do not move upward. Therefore, the cage 13 does not move in this state.

  When the switching valve 154 is on, that is, when the communication pipe line 151 is in communication, the piston 211a and the rod 212 of the hydraulic cylinder 21 can move at a speed corresponding to the throttle state of the throttle valves 152 and 153. .

  That is, when the piston 211a moves upward, that is, when the hydraulic cylinder 21 performs a contracting operation, the speed is adjusted by the throttle valve 153, and when the piston 211a moves downward, that is, the hydraulic cylinder 21 expands and contracts. When performing the operation, the speed is adjusted by the throttle valve 152. Thereby, the raising / lowering speed of the cage 13 is adjusted.

  When a downward force is applied to the rod 212 and the piston pressure by the force exceeds 1 atm, the liquid in the reservoir 155 passes through the throttle valve 153 and the check valve 153a to the head side chamber HS. There is a possibility that the rod 212 moves downward by entering. However, since the force for moving the rod 212 downward is due to the extra load applied to the movable beam 224 for moving the empty cage 13 upward, the extra load is set so that the head side chamber HS is not in a vacuum state. By appropriate selection, such downward movement of the rod 212 can be prevented.

  Since the hydraulic device 15 is configured as described above, when nothing is riding on the cage 13, the gravity due to the movable beam 224 connected to the rod 212 and the weight WT loaded thereon is larger. The rod 212 is pulled downward.

  Accordingly, when the switching valve 154 is turned on in this state, the hydraulic cylinder 21 performs an extending operation. Thereby, the cage 13 moves upward. That is, the cage 13 on the first floor automatically moves to the second floor. The speed of the cage 13 at that time is adjusted by the throttle valve 152.

  Then, when a load KJ caused by a person or an object is placed on the cage 13 on the second floor, the overall gravity of the cage 13 increases and becomes larger than the gravity caused by the movable beam 224 and the weight WT, and the rod 212 is pushed upward.

  Therefore, when the switching valve 154 is turned on in this state, the hydraulic cylinder 21 performs an expansion / contraction operation. Thereby, the cage 13 moves downward. That is, the cage 13 on the second floor automatically descends to the first floor together with people and things. The speed of the cage 13 at that time is adjusted by the throttle valve 153.

  The whole or a part of the hydraulic device 15 described above can be housed and installed in a suitable box on the building frame 11 as shown in FIG. 6, for example.

  Here, the relationship between the weight of the cage 13, the weight of the weight member, and the action of the movable pulley device 22 will be described.

  In FIG. 19, the movable beam 224 is suspended by six wires WR using three movable pulleys 223. Accordingly, six times the load applied to the cage 13 acts in the direction of lifting the movable beam 224.

That is, assuming that the total load of the movable beam 224 is KA and the total load of the cage 13 is KB, KA> 6 · KB + α (1)
When the above relationship is established, the cage 13 moves upward. Also,
6.KB> KA + β (2)
When the above relationship is established, the cage 13 moves downward.

  Α and β are resistance forces due to friction or the like.

  The total load KB of the cage 13 is the weight of the empty cage 13 when there is no load KJ due to a person or an object, and is the weight obtained by adding the load KJ to the cage 13 when the load KJ is loaded.

  Therefore, the cage 13 can be automatically moved up and down by setting the weights of the cage 13, the movable beam 224, the weight WT, and the like so that the relationship of the above expression (2) is established.

  For example, when the weight of the cage 13 is 25 kg, a force of 150 kg acts on the movable beam 224. If the weight (KA) of the movable beam 224 and the weight WT is set to 180 kg, for example, the empty cage 13 is light and can be moved up.

  When two adults weighing 60 kg ride on the cage 13, the load KB of the cage 13 becomes 145 kg, the movable beam 224 and the weight WT are moved up, and the cage 13 is lowered.

  Also, assuming that one child weighing 10 kg rides on the cage 13, the load KB of the cage 13 is 35 kg, and a force in the upward direction of 210 kg acts on the movable beam 224. Therefore, also in this case, the movable beam 224 is moved up and the cage 13 is lowered.

  That is, even when one child rides, the cage 13 moves sufficiently downward.

  The cage 13 can normally carry about 2 or 3 people. The wire WR, the pressure resistance of the hydraulic cylinder 21 and the strength of other members are set so as to withstand the maximum loading load of the cage 13.

  Next, the control device in the evacuation lifting apparatus 1 will be described.

  In FIG. 2, the building frame 11 has a position sensor SE1 for detecting the lowered position of the cage 13, and a human detection sensor SE2 for detecting whether or not there is a person or an object in the vicinity of the exit DG in the building frame 11. A position sensor SE3 for detecting the raised position of the cage 13 and door sensors SE4 and 5 for detecting that the door 12 is closed are provided.

  As the position sensors SE1 and SE3, it is possible to use a limit switch that operates when an appropriate dog provided on the cage 13 abuts, or a proximity switch or a photoelectric switch that operates by such a dog.

  Further, as the human detection sensor SE2, a photoelectric sensor composed of a projector and a light receiver, a reflection sensor that detects the presence of a person or an object in a predetermined range by emitting infrared rays or ultrasonic waves and detecting a reflection signal thereof, Other sensors can be used. In that case, it is preferable to be able to detect that there is no person in the cage 13. For this purpose, a plurality of sensors may be used.

  It is also possible to use a sensor that outputs a detection signal indicating the absence of a person or object after a predetermined time has elapsed since the presence of the person or object is no longer detected.

  As the door sensors SE4 and 5, it is possible to use a limit switch that operates when a suitable dog provided on the door 12 abuts, or a proximity switch or a photoelectric switch that operates by such a dog.

  In addition, the cage 13 is provided with an operation box SB for a rider to operate. The operation box SB is provided with a lowering button for instructing the lowering of the cage 13. The operation box SB has flexibility and is electrically connected to other boxes and the like by the cable CB.

  In the vicinity of the door 12, an indicator lamp is provided to indicate that the cage 13 is on the second floor and can be boarded.

  Further, a solar panel SP is installed on the building frame 11, and a battery (not shown) is charged with sunlight. This battery power is used as a power source for the switching valve 154, sensors SE1-5, indicator lamps, and the like.

  Some of the circuit components for these control devices may be housed inside an operation box SB provided in the cage 13, for example. It is also possible to provide an appropriate box near the door 12 and store it there.

  Further, although the battery is charged by the solar panel SP, the battery may be charged by a commercial power source. The control circuit may be operated by a commercial power source. In that case, it is preferable to use a battery for assistance.

  Next, an example of the control operation by the control device described above will be described with reference to the flowchart shown in FIG.

  In FIG. 20, when the cage 13 is on the second floor, which is the rising end (# 11), the position sensor SE3 is on. At this time, an indicator lamp provided in the vicinity of the door 12 is turned on. At this time, the lock mechanism LK is unlocked.

  An evacuee in the veranda BD opens the door 12 (# 12) and gets into the cage 13 (# 13). When the door 12 is opened, the door sensors SE4 and SE5 are turned off. When the door sensors SE4 and SE5 are off, the cage 13 does not descend even if the lowering button is pressed.

  When the door 12 is tightened (# 14), the door sensors SE4 and SE5 are turned on. When the lowering button is pressed (# 15), the switching valve 154 is turned on (# 16), and the cage 13 is lowered (# 17).

  When the cage 13 reaches the first floor, which is the descending end (# 18), the position sensor SE1 is turned on. When the position sensor SE1 is turned on, the switching valve 154 is turned off (# 19), and the cage 13 is fixed so as not to move.

  The evacuees get out of the cage 13 and go out from the exit DG (# 20). When no one is near the cage 13 and the outlet DG, this is detected by the human detection sensor SE2 and turned off, for example (# 21). As a result, the switching valve 154 is turned on (# 22), and the cage 13 moves upward (# 23).

  Such an operation is repeated, and the evacuees can go down to the ground sequentially and evacuate to a safe place.

  As described above, according to the evacuation lifting apparatus 1 of the present embodiment, when an earthquake or fire occurs, a large number of evacuees can quickly descend to the ground and evacuate to a safe place. .

  In the evacuation lifting apparatus 1, there is only one cage 13 for an evacuee to get on, and the building frame 11 only needs to have a space where one cage 13 can be moved up and down and the movable pulley apparatus 22 can be installed. It can be installed even in a small space.

  Further, the speed of the cage 13 can be easily adjusted with a simple configuration in which the throttle valves 152 and 153 are provided in the hydraulic cylinder 21.

  Moreover, since the raising / lowering of the cage 13 is performed using gravity, a hydraulic pressure source or a power source is not required, and the operation in the event of an earthquake or a fire is reliable and the reliability is high.

  Further, by making the switching valve 154 manually operated, it is possible to achieve a completely non-power source that does not require a battery.

  In addition, since the cage 13 is suspended by two wires WR, even if one of them is broken, it is held by the other one, and the cage 13 can be prevented from falling. In this respect, safety is also achieved.

  Further, the moving pulley device 22 is constituted by two sets of fixed pulley groups and moving pulley groups provided substantially symmetrically on the left and right, and the two wires WR are spanned symmetrically. There is no great force to tilt. Therefore, by providing the guide member 225 that guides the movable beam 224 with an appropriate strength, the movable beam 224 moves up and down smoothly, and no lateral load is applied to the hydraulic cylinder 21.

  In the evacuation lifting apparatus 1 of the above-described embodiment, the movable beam 224 and the weight WT are used as the weighting member. However, it is also possible to use a spring member such as a coil spring instead of the weight WT or together with the weight WT.

  For example, a coil spring that acts in the direction of pushing the piston 211 a is mounted in the head side chamber HS of the hydraulic cylinder 21. A force that moves the rod 212 in the extending direction is given by the coil spring, and this acts as a part of the weight member.

  In addition, spring members may be installed between the top plate 115 a and the movable beam 224 on both sides of the hydraulic cylinder 21. In addition, it is possible to install various types of spring members at various positions.

  In the evacuation lifting apparatus 1 according to the embodiment described above, a foot lighting device for the refugee, an indicator light for guiding the refugee, a buzzer or speaker for notifying the refugee with sound, and a passage TR A camera for monitoring the inside and the state of the cage 13, an emergency stop button that can be operated by the evacuees, and the like can be installed as necessary.

  In the evacuation lifting apparatus 1 of the above-described embodiment, by using the moving pulley apparatus 22 including the three moving pulleys 223 and the three fixed pulleys 221 as a set, the movable beam 224 can be moved with respect to the raising / lowering amount of the cage 13. The amount of movement was reduced to 1/6. However, the number of the set of movable pulleys 223 and fixed pulleys 221 is two or less, or four or more, and the moving amount of the movable beam 224 with respect to the raising / lowering amount of the cage 13 is one fourth or more or one eighth or less. can do. These numbers may be set in accordance with the structure of the building KB, the number of floors, the capacity of the cage 13 in the evacuation elevator 1 and the like. Various safety devices can be provided as necessary.

  In the moving pulley device 22, two sets of the fixed pulley group and the moving pulley group are provided. However, one set or three or more sets may be used.

  In the evacuation lifting / lowering device 1 of the above-described embodiment, the driving pulley 14 is provided with the moving pulley device 22, but the cage is directly supported by the rod 212 of the hydraulic cylinder 21 without the moving pulley device 22 being provided. Alternatively, it may be indirectly supported through the wire WR.

  In the evacuation lifting apparatus 1 according to the above-described embodiment, the example in which the evacuation lifting apparatus 1 is installed in the two-story building KB has been described.

FIG. 21 shows an example in which the evacuation elevator 1 is installed in a building KB on the third floor. In this case, the cage 13 moves only between the first floor and the third floor, and cannot get on and off the second floor. However, it is possible to get on and off the second floor.
[Second Embodiment]
Next, the lifting device of the second embodiment will be described.

  As a second embodiment, an elevator device 1B that operates as a passenger elevator when commercial power is energized and operates as an evacuation elevator when commercial power is interrupted will be described.

  In the lifting device 1B of the second embodiment, the mechanical structure is the same as that of the lifting device 1 of the first embodiment, but an additional device is included as a hydraulic circuit.

  That is, in the lifting device 1B, a hydraulic unit (hydraulic unit) is added so as to operate as a normal passenger elevator. In addition, the pressure regulating valve and accumulator are operated so that the operation as a normal passenger elevator and the operation as an evacuation elevator can be smoothly switched between commercial power supply and power failure. Various hydraulic devices (hydraulic devices) such as electromagnetic valves are additionally used.

  Accordingly, also in the lifting device 1B of the second embodiment, the building frame 11, the door 12, the cage 13, the drive device 14, the hydraulic device 15B, the hydraulic cylinder 21, the movable pulley device 22, the weight WT, the wire WR, and the like. Is provided.

  Further, a load cell is provided in the cage 13 in order to detect a load KJ caused by a person or an object. For example, it can be determined that an adult is on the cage 13 when the load KJ exceeds 10 kg.

  The operation box SB provided in the cage 13 includes a lowering button for instructing the lowering of the cage 13, an ascending button for instructing ascent, a stop floor button for designating a stop floor, and opening and closing of the door For example, an open button and a close button are provided.

  In the description of the lifting device 1B of the second embodiment, differences from the lifting device 1 of the first embodiment will be mainly described. Elements having the same functions as those of the lifting device 1 of the first embodiment are denoted by the same reference numerals, or by adding “B” to the same reference numerals, and the description thereof is omitted or simplified.

  FIG. 22 shows a hydraulic circuit of the hydraulic device 15B of the first embodiment.

  In FIG. 22, a rod side communication path TRS communicating with the rod side chamber RS of the hydraulic cylinder 21 and a head side communication path THS communicating with the head side chamber HS are provided, and a switching valve 161 for communicating or shutting them off. Is provided.

  The rod side communication path TRS is provided with a switching valve 162 for switching the throttle amount (flow rate) for the liquid flowing therethrough, and a switching valve 163 for switching between communication and blocking.

  The head side communication path THS is provided with a switching valve 164 for switching the throttle amount (flow rate) for the liquid flowing therethrough, and a switching valve 165 for switching between communication and blocking.

  A pipe line (communication pipe line) 151B constituted by the rod side communication path TRS, the head side communication path THS, and the switching valve 161 corresponds to the communication pipe line 151 of the first embodiment.

  In this embodiment, the switching valve 161 is a two-way two-position switching valve, and is a spring return type single solenoid type electromagnetic valve. The switching valve 161 is always in communication, but is switched off when the solenoid is energized. In other words, the communication conduit 151B is switched off and connected by turning on and off the solenoid.

  Similar to the switching valve 161, the switching valves 163 and 165 are two-way two-position switching valves and are spring-return type single solenoid valves.

  The switching valves 162 and 164 are switching throttle valves that can vary the throttle amount in two stages in order to adjust the flow rate of the liquid. In other words, the switching valves 162 and 164 each include two sets of parallel connection bodies of the throttle valves 152 and 153 and the check valves 152a and 153a described in the first embodiment.

  These switching valves 162 and 164 are used for adjusting the ascending / descending speed of the cage 13 and for decelerating when the cage 13 is stopped. That is, the switching valves 162 and 164 are normally off, and are adjusted so that the flow rate is appropriately reduced in this state. Further, when the switching valves 162 and 164 are turned on immediately before the cage 13 stops moving up and down, the flow rate in the rod side communication path TRS or the head side communication path THS is further reduced, and thereby the speed of the cage 13 is reduced. The vehicle is decelerated and stops smoothly.

  As described above, the switching valves 162 and 164 can adjust the flow rates of the respective liquids when switched by adjusting the respective throttle amounts.

  The switching valves 162 and 164 operate when the lifting device 1B is used as an evacuation elevator, but may also be operated when used as a passenger elevator.

  In addition, as the switching valves 162 and 164, two-way two-position switching valves may be used, and a parallel connection body of a throttle valve and a check valve may be provided outside.

  A switching valve 166 is provided between the communication conduit 151B and the reservoir 155 for communicating or blocking the connection therebetween.

  The switching valve 166 is disconnected from the communication conduit 151B when the reservoir 155 is not used, and is used to replenish liquid from the hydraulic unit EU when the amount of liquid in the reservoir 155 decreases.

  In the second embodiment, the hydraulic unit EU for selectively supplying and discharging liquid to and from the rod side chamber RS and the head side chamber HS so that the rod 212 of the hydraulic cylinder 21 is extended or contracted. Provided.

  As the hydraulic unit EU, it is possible to use hydraulic units having various known structures used for elevators. In the example shown in FIG. 22, the hydraulic unit EU includes an oil tank TK, a hydraulic pump YP, a motor M, a relief valve VRE, a switching valve VKK, and the like.

  Note that the hydraulic unit EU may be disposed at a position where it does not interfere with the cage 13 on the lowest floor, for example. Further, when the hydraulic unit EU is arranged on the top floor, it can also be used as the reservoir 155.

  The hydraulic pump YP is rotated by the motor M, and the liquid in the oil tank TK is sent out to the port PK1 or PK2 via the switching valve VKK. That is, by switching the switching valve VKK, a liquid having a predetermined pressure or flow rate is supplied from the port PK1 or the port PK2, or the liquid is returned to the port PK2 or the port PK1. In the example shown in FIG. 22, the liquid returned to the port PK2 or the port PK1 returns to the oil tank TK via the switching valve VKK.

  Since the motor M is driven by commercial power, the hydraulic unit EU does not operate when the commercial power fails.

  Note that when the liquid is supplied from the hydraulic unit EU, the switching valve 161 is cut off. However, when the lifting device 1B is operating as a passenger elevator, if the cage 13 can be lifted and lowered by the weight balance between the cage 13 and the weight WT, the switching valve 161 is communicated to be similar to the evacuation elevator. It is possible to perform a simple operation (eco-operation).

  In addition, an accumulator 167 capable of supplying liquid with gas pressure for supplying liquid to the rod side chamber RS is connected to the rod side communication path TRS via a switching valve 168.

  The accumulator 167 stores the liquid and the compressed gas in a sealed tank, and sends the liquid to the outside by the pressure of the compressed gas. Air, nitrogen, or other gas is used as the compressed gas. For supply of compressed gas, a cartridge-type gas cylinder that can be attached to and detached from the tank may be used. Moreover, you may provide the piston which moves with increase / decrease in a liquid.

  The accumulator 167 is provided with a supply line HKR together with a switching valve 169 for supplying from the hydraulic unit EU when the liquid inside thereof is insufficient. The gas pressure inside the accumulator 167 is detected by the pressure sensor 170. When the gas pressure falls below the set pressure, the switching valve 169 is switched, and the liquid is supplied from the hydraulic unit EU to the tank of the accumulator 167. To be replenished.

  The accumulator 167 opens the switching valve 168 and supplies the liquid via the rod side communication path TRS when it becomes necessary to supply the liquid to the rod side chamber RS of the hydraulic cylinder 21. This occurs when:

  That is, when a power failure occurs during operation as a normal passenger elevator, the hydraulic unit EU stops, so that the hydraulic cylinder 21 cannot receive the supply of liquid from the hydraulic unit EU. Whatever state the hydraulic cylinder 21 is, that is, whatever stroke position the rod 212 is, if a power failure occurs, the lifting / lowering device 1B must operate as an evacuation elevator from that state.

  Therefore, when a power failure occurs with the rod 212 of the hydraulic cylinder 21 extended, that is, with the cage 13 raised to the upper floor, the cage 13 descends to the lower floor unless a person is on the cage 13. It does n’t come.

  For example, if there is a power outage when there is a cage 13 on the 4th floor where no one is on board, an evacuee on the 3rd or 2nd floor will not be able to get on unless the cage 13 is lowered to the 3rd or 2nd floor. . At this time, since the hydraulic unit EU does not operate due to a power failure, the liquid is supplied from the accumulator 167 instead.

  Accordingly, the amount of liquid and the gas pressure in the accumulator 167 are set to values that exceed the amount and gas pressure necessary to lower the cage 13 from the fourth floor to the second floor, for example. In order to maintain such an amount of liquid, the switching valve 169 is switched at an appropriate timing by the detection of the pressure sensor 170 during operation of the hydraulic unit EU, and the accumulator 167 is replenished with liquid.

The gas pressure of the accumulator 167 is, for example, 0.6 kg / cm ² or more. For example, when the accumulator 167 decreases to about 0.8 to 1.0 kg / cm ² , the switching valve 169 is switched to replenish the liquid.

  The switching of the switching valve 169 may be performed by electric control, but may be performed by hydraulic pressure or mechanical pilot operation. For example, the switching valve 169 may be switched by generating a pilot pressure detected by the pressure sensor 170.

  The accumulator 167 is necessary to avoid the above situation when the lifting device 1B is installed in a building KB having three or more stories. However, it is not necessary when the lifting device 1B is installed in a two-story building KB. In this case, the switching valves 168 and 169, the pressure sensor 170, and the like are naturally unnecessary.

  Between the rod side communication path TRS and the port PK1, a pressure adjusting valve 171 for maintaining the hydraulic pressure of the rod side communication path TRS higher than the hydraulic pressure on the hydraulic pressure unit EU side, that is, the port PK1 side is provided. Prepare. A check valve 172 is connected to the pressure regulating valve 171 in parallel.

  The pressure adjustment valve 171 is for preventing the liquid in the reservoir 155 from returning to the tank of the hydraulic unit EU due to the pressure in the reservoir 155, and is adjusted to a pressure larger than the pressure in the reservoir 155. Is done.

  For example, in the reservoir 155, when a piston that slides on the inner peripheral surface of the container is provided at the boundary between the liquid and the gas, depending on the sliding resistance or weight of the piston, or depending on the height position of the reservoir 155 , Pressure is generated in the liquid. Considering these pressures, the set pressure of the pressure regulating valve 171 is adjusted so that the pressure is higher than the total pressure K applied to the rod side communication path TRS.

  Since pressure is generated inside the reservoir 155, the lid and the like may be configured to withstand the pressure.

  In the hydraulic device 15B, as described above, since the switching valves 161-166, 168, 169 are electromagnetic valves, they are operated by electric power. Among these, those that need to be switched even during a power failure are supplied with power from a power supply device different from the commercial power, such as a battery or a solar cell.

  For example, the switching valves 162 to 165 and 168 are operated by a power supply device using solar cells. The switching valves 161 and 166 are operated with commercial power. When the switching valves 161 and 166 are operated with commercial power, they are switched on and off only when the commercial power is energized, and are switched off during a power failure, so that the liquid is in a communicating state.

  Although not shown in the figure, various necessary equipment is provided so that it can be used as a passenger elevator. For example, an actuator such as a motor for opening and closing the door 12 on each floor, a limit switch for confirming the opening and closing of the door 12, a limit switch for generating a command signal for stopping and decelerating the cage 13 on each floor, A lighting device, an operation device, a speaker for guidance, and the like are provided as necessary.

  Further, when a motor is provided for opening and closing the door 12, the motor is switched to operate with commercial power when the commercial power is energized and with a power supply device using a battery or a solar cell during a power failure. It is also possible to configure the door 12 to be manually opened and closed during a power failure.

  In the second embodiment, since the lifting device 1B is also used as a normal passenger elevator, the door 12 may be configured to be openable and closable by double-sliding the slide.

  In addition, the control device of the lifting device 1B is provided with a circuit or device that detects a power failure of commercial power. Such a power failure detection device may be, for example, a relay (relay) whose contact is turned on and off using commercial power as a power source. Contacts are turned on or off when commercial power is applied or a power failure occurs. The power failure detection device may be switched between normal passenger elevator control and evacuation elevator control, and the solenoid power supply circuit of each switching valve may be switched.

  When the commercial power is energized, the control device operates the lifting device 1B as a normal passenger elevator and detects the commercial power failure, thereby operating the lifting device 1B as an evacuation elevator.

  Next, the operation of the lifting device 1B during energization of commercial power and during a power failure will be described with reference to FIGS.

  FIG. 23 to FIG. 30 show operating states when commercial power is energized.

  FIG. 23 shows a rise when a person is on board, FIG. 24 shows a stop when the person is on board, FIG. 25 shows a drop when a person is on board, and FIG. 26 shows a person on board. FIG. 27 shows an unmanned state when rising, FIG. 28 shows an unmanned state when rising stops, FIG. 29 shows an unmanned state when descending, and FIG. 30 shows an unmanned state. When the descent stops, respectively.

  FIG. 31 to FIG. 37 show the operation state at the time of commercial power outage.

  FIG. 31 shows a case where a lowering command is issued when the vehicle is stopped on the upper floor in an unattended state, FIG. 32 is a case where a lowering command is issued when the vehicle is stopped on the upper floor in an unattended state, and FIG. FIG. 34 shows a descent when a person is on board, FIG. 35 shows an end of a descent with a person on board, FIG. 36 shows a situation when a person evacuates while stopped on a lower floor, and FIG. Indicates the rise in the unattended state.

  38 and 39 show the operating state of the switching valve in each state of FIGS.

  Even when the lifting device 1B is used as a normal passenger elevator, it is lifted by gravity balance between the cage 13 and the weight WT without receiving supply of liquid from the hydraulic unit EU, as in the case of the evacuation elevator. Operation is performed.

  In FIG. 23, a passenger (load KJ) gets into the cage 13 below the floor and the lift button is pressed. The switching valve 161 is shut off, and the switching valves 163 and 165 are in communication. The hydraulic pressure from the hydraulic unit EU is supplied to the head side chamber HS of the hydraulic cylinder 21 through the head side communication path THS. The rod 212 of the hydraulic cylinder 21 is extended, the moving pulley device 22 is lowered, and the cage 13 is raised.

  At this time, when the amount of liquid in the reservoir 155 is less than the specified amount, the switching valve 166 communicates and the liquid is supplied from the hydraulic unit EU to the reservoir 155. That is, the reservoir 155 is provided with a sensor for detecting the upper limit and the lower limit of the amount of the liquid. When the sensor detects the lower limit and the cage 13 is on standby, the switching valve 166 is Liquid is supplied in communication.

  In FIG. 24, when the destination floor is reached, the switching valves 163 and 165 are shut off and the hydraulic cylinder 21 is stopped. Note that the switching valves 162 and 164 operate immediately before stopping to switch the throttle amount, and the cage 13 is decelerated and smoothly stops. The passenger opens the door 12 and gets off the cage 13.

  In FIG. 25, a new passenger gets into the cage 13 on the upper floor and presses the lowering button. The descending operation in this state is performed using gravity.

  That is, the switching valve 161 communicates and the switching valves 163 and 165 communicate. The switching valve 166 also communicates. The hydraulic unit EU may be stopped.

  The cage 13 is naturally lowered by the load KJ by the passenger. As a result, the rod 212 of the hydraulic cylinder 21 contracts. The liquid in the head side chamber HS is pushed out to the head side communication passage THS and flows into the rod side chamber RS through the rod side communication passage TRS. The excess liquid due to the difference in area between the head side chamber HS and the rod side chamber RS flows into the reservoir 155. Note that the liquid in the rod side communication path TRS does not exceed the set pressure of the pressure regulating valve 171 and therefore does not flow into the hydraulic pressure unit EU.

  In FIG. 26, when the destination floor is reached, the switching valves 163 and 165 are shut off and the hydraulic cylinder 21 is stopped. The switching valves 161 and 166 are also shut off. The passenger opens the door 12 and gets off the cage 13.

  In FIG. 27, when the cage 13 is called from the upper floor, the cage 13 rises in an empty state. At this time, the switching valve 161 communicates and the switching valves 163 and 165 communicate. The switching valve 166 also communicates. The hydraulic unit EU may be stopped.

  Since the load KJ on the cage 13 is 0, the cage 13 naturally rises due to the load of the weight WT. Along with this, the rod 212 of the hydraulic cylinder 21 extends. The liquid in the rod side chamber RS is pushed out to the rod side communication passage TRS and flows into the head side chamber HS through the head side communication passage THS. The liquid deficient due to the difference in area between the head side chamber HS and the rod side chamber RS is supplied from the reservoir 155. Note that the liquid in the rod side communication path TRS does not exceed the set pressure of the pressure regulating valve 171 and therefore does not flow into the hydraulic pressure unit EU.

  In FIG. 28, when the destination floor is reached, the switching valves 163 and 165 are shut off and the hydraulic cylinder 21 is stopped.

  In FIG. 29, when the cage 13 is called from downstairs, the cage 13 descends in an empty state. At this time, the switching valves 163 and 165 communicate and the liquid is supplied from the hydraulic unit EU to the rod side chamber RS via the rod side communication path TRS.

  In FIG. 30, when the destination floor is reached, the switching valves 163 and 165 are shut off and the hydraulic cylinder 21 is stopped.

  In this way, the lifting device 1B operates as a normal passenger elevator when commercial power is supplied.

  In this embodiment, during the operation as a normal passenger elevator, as shown in FIGS. 25 and 27, the gravity balance between the cage 13 and the weight WT is not caused by supplying the liquid from the hydraulic unit EU. There is a lifting operation. Accordingly, it is not necessary to operate the hydraulic unit EU by that amount, so that power consumption is suppressed and energy is saved.

  However, during operation as a normal passenger elevator, the cage 13 may always be raised and lowered by supplying liquid from the hydraulic unit EU regardless of the gravity balance between the cage 13 and the weight WT.

  In FIG. 31, the cage 13 without a passenger is stopped on the upper floor. The switching valves 161 and 166 are in communication, and the switching valves 163 and 165 are shut off. Since the commercial power is a power failure, the hydraulic unit EU stops operating.

  In FIG. 32, when the cage 13 is called from the lower floor while the cage 13 is stopped on the upper floor, the switching valve 165 communicates with the switching valve 168 to lower the empty cage 13, and the accumulator is communicated. The liquid is supplied from 167 to the rod side chamber RS of the hydraulic cylinder 21.

  As a result, the rod 212 contracts, the weight WT rises, and the cage 13 descends. The liquid in the head side chamber HS of the hydraulic cylinder 21 flows into the reservoir 155 through the switching valve 166 via the head side communication path THS.

  In FIG. 33, the passenger gets on the cage 13 stopped on the upper floor. The switching valves 163 and 165 are in a shut-off state.

  In FIG. 34, when the switching valves 163 and 165 communicate with each other, the cage 13 is lowered by the gravity balance between the cage 13 and the weight WT.

  In FIG. 35, when the cage 13 reaches the lower level (the first floor), the switching valves 163 and 165 are shut off and the cage 13 stops.

  In FIG. 36, the passenger gets out of the cage 13 stopped on the first floor. During this time, the switching valves 163 and 165 are shut off and the cage 13 is stopped.

  In FIG. 37, when the passenger gets down and the cage 13 becomes empty, the switching valves 163 and 165 communicate with each other and the cage 13 rises.

  As described above, the lifting device 1B operates as an evacuation elevator during a commercial power failure.

  As is clear from the above description, while the lifting device 1B is operating as a passenger elevator, the power lifting device 1B can operate as an evacuation elevator from that point, regardless of the power failure. It is.

  Therefore, according to the lifting device 1B of the present embodiment, it can be used as a passenger elevator when energized with commercial power, and can be used as an evacuation elevator even when an emergency such as an earthquake or a fire occurs.

  In the embodiment described above, the movable beam 224, the hydraulic cylinder 21, the moving pulley device 22, the building frame 11, the door 12, the cage 13, the drive device 14, the hydraulic device 15, the control device, the lock mechanism LK, The configuration, structure, circuit, shape, number, material, arrangement, etc. of each part or the whole of the hydraulic unit EU or the lifting device 1, 1B can be appropriately changed in accordance with the gist of the present invention.

  The lifting device of the present invention can be used for other purposes in addition to evacuation as described above, for cargo handling, or for daily downward movements such as elderly people with weak knees. Further, instead of moving the cage in the vertical direction, the cage may be moved in an oblique direction having an angle with respect to the vertical direction. In that case, the cage may run on the rail.

1,1B Lifting device 11 Building frame 12 Door 13 Cage 14 Drive device 15 Hydraulic device 21 Hydraulic cylinder 212 Rod 22 Dynamic pulley device 151 Communication pipelines 152, 153 Throttle valve 154 Switching valve 155 Reservoir 161-166 Switching valve 167 Accumulator 168 Switching valve 171 Pressure adjusting valve 212 Rod 221 Fixed pulley (pulley)
223 Moving pulley (pulley, weighted member)
224 Movable beam (weight member)
226 Weight attachment part WT Weight (weight member)
WR wire

Claims (14)

A cage arranged to be able to ascend and descend in the elevating passage of the building frame;
A moving pulley device configured to include a wire for hanging the cage and a plurality of pulleys around which the wire is stretched;
A hydraulic cylinder that is disposed between the building frame and the movable pulley device and in which the rod extends or contracts when the cage is raised or lowered;
A communication conduit capable of communicating the rod side chamber and the head side chamber of the hydraulic cylinder;
A throttle valve for adjusting the flow rate of the liquid in the communication line;
A switching valve for switching so as to block or communicate the communication line;
A reservoir connected to the communication pipe for adjusting the amount of liquid due to a difference in area between the rod side chamber and the head side chamber;
The rod is extended or contracted to lift the cage when no load is loaded on the cage, and the rod is contracted or extended when the cage is loaded. A weight member for generating a force of a magnitude capable of lowering the cage;
A lifting device characterized by comprising: The moving pulley device is
One or more fixed pulleys fixedly attached to the building frame;
A movable beam provided so as to be movable up and down by a guide member with respect to the building frame, and connected to the rod or head of the hydraulic cylinder;
One or more pulleys attached to the movable beam;
Have
The wire has one end connected to the cage, the other end connected to the building frame, and is stretched over the fixed pulley and the movable pulley.
The lifting device according to claim 1 . The hydraulic cylinder is provided in a vertical posture at the center in the width direction of the building frame,
The movable beam is provided in a horizontal posture so as to extend in the width direction of the building frame, and is connected to the hydraulic cylinder at a central portion thereof.
The moving pulley device is provided in a symmetric state on both sides of the hydraulic cylinder,
The lifting device according to claim 2 . The movable beam is provided with a weight attaching portion for attaching a weight,
The movable beam and the weight attached to the weight attachment portion constitute at least a part of the weight member.
The elevating device according to claim 2 or 3 . The weight member is configured to include a spring member in a part thereof.
The elevating device according to any one of claims 2 to 4 . Liquid is selectively supplied to and discharged from the rod-side chamber and the head-side chamber in a state where the communication between the rod-side chamber and the head-side chamber by the communication conduit is blocked so that the rod is extended or contracted. A hydraulic unit for
The elevating device according to any one of claims 1 to 5 . A pressure regulating valve is provided between the rod side chamber or the head side chamber and the hydraulic unit to maintain the hydraulic pressure in the rod side chamber or the head side chamber higher than the hydraulic pressure on the hydraulic unit side.
The lifting device according to claim 6 . An accumulator capable of delivering the liquid with a gas pressure for supplying the liquid to the rod side chamber;
The lifting device according to claim 6 or 7 . A lifting device that operates as a passenger elevator when commercial power is energized and operates as an evacuation elevator when commercial power is interrupted,
A cage arranged to be able to ascend and descend in the elevating passage of the building frame;
A hydraulic cylinder arranged such that the rod is extended or contracted as the cage is raised or lowered;
A first switching valve for communicating or blocking a rod side communication path communicating with the rod side chamber of the hydraulic cylinder and a head side communication path communicating with the head side chamber;
The rod is extended or contracted to lift the cage when no load is loaded on the cage, and the rod is contracted or extended when the cage is loaded. A weight member that generates a force of a magnitude capable of lowering the cage;
A hydraulic unit for selectively supplying and discharging liquid to and from the rod side chamber and the head side chamber so that the rod is extended or contracted;
With
When energizing commercial power, at least when the cage is raised and when the cage is lowered when no load is placed on the cage, the first switching valve is In this state, by selectively supplying and discharging liquid to and from the rod side chamber and the head side chamber by the hydraulic unit, the rod is extended or contracted to raise the cage. Or lowered
In the event of a commercial power outage, the first switching valve is in communication, and the rod is contracted or extended by the gravity of the weight member, the gravity of the cage, and the gravity balance due to the load to raise the cage. Or descend,
A lifting device characterized by that. A second switching valve that is inserted into the rod-side communication path or the head-side communication path and capable of switching between communication and shut-off when a commercial power failure occurs;
The lifting device according to claim 9 . In order to adjust the amount of liquid due to the difference in area between the rod side chamber and the head side chamber, which is connected to the head side communication passage or the rod side communication passage via a third switching valve that can communicate with a commercial power failure. Comprising a reservoir,
The lifting device according to claim 9 or 10 . A pressure regulating valve is provided between the rod side chamber or the head side chamber and the hydraulic unit to maintain the hydraulic pressure in the rod side chamber or the head side chamber higher than the hydraulic pressure on the hydraulic unit side.
The lifting device according to any one of claims 9 to 11 . An accumulator capable of supplying liquid with gas pressure to supply liquid to the rod side chamber at the time of power failure of commercial power;
The lifting device according to any one of claims 9 to 12 . A rod side throttle valve for adjusting the flow rate of the liquid in the rod side communication path;
A head side throttle valve for adjusting the flow rate of the liquid in the head side communication path,
The lifting device according to any one of claims 9 to 13 .

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