JPH028184A - Fluid pressure elevator - Google Patents

Abstract

PURPOSE:To realize the miniaturization, space saving, high efficiency and fire resistant improvement of a fluid compressor by forming the piston rod of the fluid pressure cylinder for driving by the hollow member whose hollow part is released to the atmosphere and communicating the fluid base inside the piston rod and the counter rod side fluid chamber of the cylinder. CONSTITUTION:A riding cage is lifted via a pulley 16 by plumbing a high pressure fluid to a cylinder 10 via the control valve not shown in a figure and taking a piston rod 10a in and out. In this case, the movement of the working fluid by a pump not shown in a figure pushes down a piston 20 with its movement to an oil chamber 27 from an oil chamber 28 at the lift time, feeding to the chamber 28 from the chamber 27 at the descent time vice versa and pushing up the piston 20 upward. The piston rod 10a is thus moved vertically. By this structure space saving can be realized with its miniaturization and yet it can be made highly efficient. Also the fire resistance can be improved by decreasing the fluid amt.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] This invention relates to a hydraulic elevator of the type that raises and lowers a car using a hydraulic cylinder driven by supplying or discharging high-pressure fluid.

[Conventional technology]

Conventionally, in this type of fluid pressure elevator, the first car is supported directly by the plunger of the fluid pressure cylinder, or indirectly via a pulley or rope, and the car is raised by the upward movement of the plunger, and the pumping pressure fluid is controlled. The car is raised and lowered by doing this. Therefore, it has the advantage that the weight of the passenger seat and load is supported by the fluid pressure cylinder, and the burden placed on the building is light, so it is widely used in low-rise buildings.

[Problem to be solved by the invention]

As mentioned above, the rise in the first power corner is carried out by the upward movement of the plunger of the fluid pressure cylinder, and since the diameter of the plunger needs to be increased due to the buckling strength of the plunger, the fluid pressure is kept at a relatively low pressure (1 to 1). 5 MPa), and as a result, fluid pressure equipment such as flow rate control valves, fluid pressure pumps, and tanks have also become larger, leading to higher costs.

In addition, pressure loss caused by valves, piping, etc. also became a large proportion due to the low operating pressure, reducing energy efficiency.

Furthermore, as described above, since a large amount of fluid is used, the fluid pressure source becomes large and the space for accommodating it becomes large. Furthermore, the working fluid commonly used today is mineral oil.
Since mineral oil is flammable, the higher the amount of fluid, the worse the fire resistance.

The purpose of the present invention is to solve these problems and to provide a fluid pressure elevator that achieves miniaturization, space saving, cost reduction, and high efficiency of fluid pressure equipment, and at the same time, improves fire resistance. be.

[Means to solve the problem]

The above object includes: an elevator frame member that supports a car so that it can be raised and lowered; a fluid pressure cylinder that is attached to the elevator frame member and that lifts and lowers the car by controlling the flow rate of pressure fluid supplied and discharged; a fluid pressure generator for generating fluid pressure of pressure fluid to be supplied to a pressure cylinder, the piston rod of the fluid pressure cylinder being formed of a hollow member whose hollow part is open to the atmosphere, and a piston provided in the piston rod; This is achieved by providing a hole in the piston rod and communicating the fluid chamber inside the piston rod with the fluid chamber on the opposite rod side of the hydraulic cylinder.

[Effect]

As a result, the piston rod is constantly subjected to tensile force,
Buckling is eliminated and the rod diameter can be made smaller. Furthermore, the fluid pressure acting on the piston can be selected arbitrarily, high fluid pressure can be used, and the diameter of the piston can be reduced, making it possible to significantly downsize the fluid pressure cylinder. As a result, the flow rate becomes smaller, and the flow control valve and fluid pressure pump can be made smaller. Furthermore, the fluid chamber on the side opposite to the rod of the fluid pressure cylinder can be used as a tank, and the fluid pressure unit can be significantly downsized. This not only saves space but also lowers costs! -1 It becomes lighter. Furthermore, the use of high pressure reduces the loss pressure ratio and improves energy efficiency.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

1 is a passenger, 2 is a lifting frame member, 3 is a drive unit, 19
connects the car 1 and the drive unit 3 to the pulley 16°17.1
A zero-th power car 1, which is a rope connected via a rope 8, is supported by guide rollers or shoes 4 and 6 so as to be vertically movable along the elevating frame member 2.

A part of the rope 19 is fixed to the hanging plate 5, and the other end is fixed to the lifting frame member 2 via a cushioning material or the like. The drive device 3 includes a fluid pressure cylinder 10. Control valve 11. Pump 12. Motor 13
These devices are connected by pipes 14 and 15. There is a shock absorber at the bottom of the lift frame for safety! 8 will be provided.

In this structure, the weight of the car 1 becomes a tensile force on the rope 19, which acts in a direction to pull out the rod 10a of the cylinder 10.

When raising the rider, the motor 13 is started, the pump 12 is driven, and the discharged high pressure fluid is controlled by the control valve 11 and supplied to the cylinder 10 via the piping 15, and the piston rod 10a of the cylinder is raised. pulling the rope 19 through the pulley 16 by drawing it into the cylinder;
Raise the power and 1.

When lowering the car 1, the high pressure fluid in the cylinder 10 is discharged through the pipe 15 while being controlled by the control valve 11, the piston lorado 10a is extended by the weight of the car and the car 1, and the car and the car 1 are lowered.

Fig. 2 shows an embodiment of a fluid pressure cylinder, which is composed of a cylinder 10, a hollow piston rod 10a, a piston 20 with a packing 23, a gland 21 with a packing 22, and a wear ring 24. 16a.

A shaft 16c having a shaft 16b is fixed with a nut 26. These pulleys 16a and 16b are shown in 1:40-bing in Figure 1, where the rope 19 is being delivered as shown in Figure 1, but since the method of roving is not related to the essence of the invention, this illustration is not applicable. It is not limited to the method,
A flow path 15 is provided in the chamber 27 of the cylinder 10, a flow path 14 is provided in the chamber 28, and the chamber 28 and the chamber 29 inside the rod 29 communicate with each other through a hole 30 provided in the piston 20. The air breather 25 provided on the rod 10a allows the air above the chamber 29 to freely enter and exit through the air filter 31.

When the elevator is stopped, the piston rod 10a
As it is pulled by the weight of the rider 1 through the rope 19, the chamber 27 is at high pressure, and the chambers 28, 29 are connected to atmospheric pressure via the air breather 25 and are at low pressure.

When raising the car 1, drive the pump 12 to raise the car 2.
6. The control valve 11 sucks the working fluid from the flow path 14 through the flow path 14 and supplies high pressure fluid to the control valve 11.
is supplied to the chamber through the pump and pushes the piston 20 downward. As a result, the rod 10a is retracted, and the car is raised via the booby and rope. At this time, since the flow rate of the fluid from the chamber 28 to the pump 12 and the flow rate of the fluid from the control valve to the chamber 27 are equal, there is almost no change in the volume of the oil in the cylinder even if the rod 10a moves. There is a slight change (in this case a decrease) in the volume that can be occupied by the fluid as the rod 10a is drawn into the cylinder 10, but this is due to the fact that the hole 30
can be absorbed by escaping to the inside of the rod 10a.

Conversely, when lowering the car 1, the control valve 11
High-pressure fluid is moved from chamber 27 to chamber 28 using the weight of the passenger car and 1. As a result, the piston 20 is pulled upward, the piston rod 10a extends, and the rider descends via the pulley and rope. In this case as well, as in the case of rising, the volume change of the fluid in the cylinder is very small, and the rod 10a changes by the volume (increasing in this case) as it moves out of the cylinder 10. It is supplemented to the chamber 28 through the hole 30. By doing this, the liquid level in chamber 29 will fluctuate slightly due to the movement of the rod, but this amount will be small. This clearly shows that the chamber 29 in the rod 10a needs to be larger than the variation in the volume that can be occupied by the fluid due to expansion and contraction of the rod, and also shows that the volume can be small.

When initially filling a fluid pressure cylinder with this structure, fluid is supplied to the chamber 27 from the channel 15, and at the same time air is bleed (a dedicated air bleed hole is provided, although not shown). possible).

Fluid is supplied to the chambers 28 and 29 from the air breather 25 portion, and air is bleed at the same time (a dedicated air bleed hole may be provided, although not shown). In this way, in the fluid pressure cylinder of this embodiment, Easily fills fluid and bleeds air.

According to this embodiment, the support frame that guides the elevator car is self-supporting, and the load on the building is reduced, and since it is sufficient to support the weight of the car corner and the weight of the support frame, the support frame is self-supporting. The weight of the support frame itself and the support frame itself can be reduced.

Furthermore, the weight of the first car is always supported by the tension of the fluid pressure cylinder, and the piston rod receives only the tensile force when the car goes up as well as when it goes down, so it will not buckle. As a result, a high pressure ratio of the working fluid pressure can be achieved as described above, and it is possible to reduce not only the diameter of the piston rod but also the diameter of the piston and, by extension, the diameter of the cylinder, making it possible to significantly downsize the fluid pressure cylinder. This makes it possible to reduce the amount of fluid used and at the same time downsize the equipment used, such as the fluid pressure pump, control valve, filter, etc., and the fluid pressure source made up of these can be significantly downsized.

Furthermore, since the chamber on the side opposite to the rod of the cylinder can be used as a tank, there is no need for a tank like in the past. Therefore, depending on the specifications of the hydraulic elevator, equipment such as motors, hydraulic pumps, control valves, filters, etc. It is also possible to configure it integrally with the fluid pressure cylinder.

This is very advantageous in terms of space saving.

It will also be advantageous in deciding the layout of the building.

Furthermore, since the fluid pressure used can be increased, the rate of pressure loss in equipment and piping is relatively reduced, and energy efficiency is improved. Furthermore, using less fluid is effective not only in improving fire resistance but also in reducing costs.

Furthermore, being able to miniaturize the entire system dramatically improves work efficiency such as transportation and installation.

3 to 5 show another embodiment of the present invention, in which a guide rail 42 is provided in the hoistway 40, the car 1 is attached to be movable up and down via the car frame 1a, and one end of the lobe 19 is It is fixed to this frame 1a. Pulley 17, 1B
The pulley mount 41 is fixed, and this mount 41 is attached to the fixed frame 4.
It is fixed to the hoistway with 1a and 41b. The cylinder 10 is fixed to a cylinder fixing frame 42 provided on a boot IJ mount 41.

In addition, the same symbols as in FIG. 1 indicate the same parts as in FIG. 1.

While FIG. 1 has a self-supporting elevator frame 2, in this embodiment, the car is raised and lowered using a guide rail provided in the hoistway as a guide, and a pulley frame and cylinder fixing frame are separately provided in the hoistway. It supports a square cage or cylinder, and its operation is the same as that shown in Fig. 1, so its explanation will be omitted. In this type of elevator, the building must bear the weight of the corner, the pulley frame, and the cylinder, but at the same time there is no restriction on the stroke of the corner, and the lobe tension between the pulley frame and cylinder is borne by the cylinder fixing frame. An advantage over the embodiment of FIG. 1 is that the building can be designed regardless of the roving method.

FIG. 6 shows an example when it is attached to a building 50.
Since it has a self-supporting frame structure, the burden on the building can be reduced even when newly constructed, and it can also be easily added to an existing building. 5
If 0 is an existing building, a wall 40 is installed to form a hoistway 40.
It can be easily installed by providing a frame a and making the lifting support frame 2 stand on its own inside the frame and fixing it at an appropriate location relative to the building. In this case, before installing the ceiling of the hoistway 40, it is also possible to suspend and install it using a crane or the like.

Fig. 7 shows an elevator for carrying in and out parts of a parts warehouse. The same symbols as in Fig. 1 represent parts having the same function. Parts are moved from the shelf 52 of the parts shelf 51 instead of the basket. A table 53 incorporating a device (not shown) for raising and lowering the table 53 is raised and lowered.

The support frame 2 itself is movable along rails 54. The operation is the same as described above and will be omitted.

〔Effect of the invention〕

In the fluid pressure elevator according to the present invention, (1) Since the elevator support frame holds the seats and the drive device,
The load on the building is light, and in some cases, it can be completely self-supporting, making it suitable for lightweight buildings.

Enables expansion into existing buildings.

(2) Since the car is supported and driven by the tension of the cylinder, buckling of the piston rond is no longer a problem, and high pressure fluid pressure can be used.
Other fluid pressure equipment can be made smaller and lighter, saving space and reducing costs.

(3) Since the chamber on the opposite side of the piston can be used as a tank, it eliminates the need for a tank device like a general fluid pressure source, making the fluid pressure source more compact and space-saving, and providing greater flexibility in building layout. increases.

(4) Since it becomes possible to employ a high-pressure fluid ratio, the relative ratio of pressure loss in fluid pressure equipment is reduced, and energy efficiency is improved.

(5) The device can be made smaller and lighter, dramatically improving work efficiency.

(6) The amount of fluid used is reduced, reducing downgrading and improving fire resistance.

[Brief explanation of the drawing]

FIG. 1 is an embodiment of the hydraulic elevator according to the present invention, FIG. 2 is a structure of a fluid pressure cylinder, FIG. 3 is another embodiment, and FIG. 4 is a diagram showing the cylinder support method of FIG. 3. Figure 5 is a view from above in Figure 3, No. 27 ＼ Bistono 31-i! ! ] Country I Heat Day 1+ Map

Claims (1)

[Scope of Claims] 1. A lifting frame member that supports the car so that it can be raised and lowered, and a fluid pressure cylinder that is attached to the lifting frame member and that lifts and lowers the car by controlling the flow rate of pressure fluid supplied and discharged. and a fluid pressure generating device that generates fluid pressure of pressure fluid to be supplied to the fluid pressure cylinder, wherein the piston rod of the fluid pressure cylinder is formed of a hollow member whose hollow part is open to the atmosphere, and the piston rod is formed of a hollow member whose hollow part is open to the atmosphere. A fluid pressure elevator characterized in that a hole is provided in a piston provided in the piston, and a fluid chamber inside the piston rod and a fluid chamber on the opposite rod side of the fluid pressure cylinder are communicated. 2. The fluid pressure elevator according to claim 1, wherein the fluid pressure generating device includes a hydraulic pump that is integrally installed in the fluid pressure cylinder and supplies pressure fluid, a motor that drives the hydraulic pump, and a flow rate of the pressure fluid. A fluid pressure elevator characterized by comprising a control valve that controls the. 3. A parts shelf for storing parts, a table used for raising and lowering the parts, an elevator frame member that supports the table so that it can be raised and lowered, a rail that guides movement of the elevator frame member, and a rail that is attached to the elevator frame member. a fluid pressure cylinder that raises and lowers the table by controlling the flow rate of pressurized fluid supplied and discharged; and a fluid pressure generator that generates the fluid pressure; The piston is formed of a hollow member that is open to the piston rod, and a hole is provided in the piston provided in the piston rod, so that the fluid chamber inside the piston rod communicates with the fluid chamber on the opposite rod side of the liquid cylinder. Hydraulic elevator.