JPS606064Y2 - hydraulic elevator - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a hydraulic elevator that has an improved hydraulic jack for raising and lowering an elevator car.

Generally, a hydraulic elevator, as illustrated in FIG.
A hydraulic jack 7 is fixed to the bottom of the hoistway 8, a deflection wheel 2 is installed at the upper end of the plunger 4 fitted into the cylinder 5 of the hydraulic jack 7, and a wire rope 3 is fixed at one end to the bottom of the hoistway 8. is hung on the deflection wheel 2, and the elevator car 1 is connected to the other end of the wire rope 3.

Note that 9 in FIG. 1 indicates a building.

For example, when a building equipped with such a hydraulic elevator is expanded from the second floor shown in Figure 1 to the third floor shown in Figure 2, the stroke of the hydraulic elevator is lengthened to serve the third floor. There are many plans to add more floors to the building.

However, in conventional elevators, the entire hydraulic jack 7 was replaced with one with a longer stroke when a building was expanded.
There was a problem of high cost.

This idea was made in view of the above-mentioned circumstances, and the purpose is to provide a hydraulic elevator that can easily and inexpensively cope with the expansion of floors by improving the hydraulic jack. That is.

An embodiment of this invention will be described below with reference to FIGS. 3 and 4.

FIG. 3 shows the state of a building scheduled for floor addition before the floor increase, and FIG. 4 shows the state of the same building after the floor increase.

In FIG. 3, 7 is a hydraulic jack, and this hydraulic jack 7 is slidably inserted into the cylinder 5 having the length necessary for the stroke after the building 9 is increased. The plunger 4 has a length necessary for the stroke.

An extension preventing cylinder 10 having an inner diameter approximately equal to the outer diameter of the plunger 4 is fitted into the plunger 4 so as to be removable.

The lower end of this extension prevention cylinder 10 is supported by a stopper 11 which also serves as a pressure receiving member provided at the lower end of the plunger 4, and the upper end of the extension prevention cylinder 10 is located at a required height and can be attached to and detached from the upper end of the cylinder 5. They face each other so as to come into contact with the fixed cylinder cap 6.

In this embodiment, the configuration other than those described above is the same as that shown in FIG. 1, so the same parts are given the same reference numerals in FIG. 3 as in FIG. 1, and their explanation will be omitted.

In the state shown in FIG. 3, when hydraulic pressure is applied to the lower end of the cylinder 5 of the hydraulic jack 7, the plunger 4 rises and the deflection wheel 2 rises accordingly. The suspended elevator car 1 rises.

After the car 1 reaches the second floor of the building 9, the extension prevention tube 10 fitted into the plunger 4 comes into contact with the cylinder cap 6 to prevent the plunger 4 from extending further and being pulled out from the cylinder 5. prevent.

Furthermore, when the hydraulic pressure applied to the lower end of the cylinder 5 is released, the elevator car 1 descends under its own weight, as in a normal hydraulic elevator of this type.

As shown in FIG. 4, when the building 9 is increased from the second floor to the third floor, the cylinder cap 6 of the hydraulic jack 7 is removed and the plunger 4 is pulled out from the cylinder 5. Alternatively, the stopper 11 is removed from the plunger 4, and the expansion prevention member 10 is further pulled out from the plunger 4.

Thereafter, the support member or stopper 11 of the deflection wheel 2 is fixed to the plunger 4, the plunger 4 is inserted into the cylinder 5, and the cylinder cap 6 is attached to the cylinder 5.

Also, the wire rope 3 for suspending the elevator car 1 is replaced with a longer one.

This makes it possible to lengthen the stroke of the hydraulic jack 7 to raise the elevator car 1 to the third floor and then lower it from there.

As explained above, according to this invention, when an increase in the floors of the building 9 is planned, the hydraulic jack 7 with a stroke corresponding to the increase in floors is used in advance, and the plunger 4 of this hydraulic jack 7 is
By fitting and supporting the expansion prevention tube 10 made of steel pipe or the like to shorten the stroke of the plunger 4, after adding floors to the building, the expansion prevention tube 10 can be pulled out from the plunger 4 and the elevator car 1 can be removed. By simply replacing the suspended wire rope 3 with a longer one, the stroke of the plunger 4 can be extended, allowing the elevator car 1 to ascend to the added floor of the building and then descend from there. By simply adding the extension prevention cylinder 10 without performing machining, it is possible to easily and inexpensively deal with increasing the number of floors in a building, and it is particularly effective when the stroke of the hydraulic jack 7 is relatively short. You can get the effect that there is.

[Brief explanation of the drawing]

Figures 1 and 2 are partially longitudinal side views showing a conventional example of a building before and after the floor addition, respectively, and Figures 3 and 4 are building floor extensions according to an embodiment of this invention. FIG. 3 is a side sectional view showing the state before and after the addition of floors. 1... Elevator car, 3... Wire rope, 4... Plunger, 5... Cylinder, 7... Hydraulic jack, 9...・・・・・・
Building, 10... Extension prevention member, 11...
・Stopper. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A hydraulic jack 7 having a stroke corresponding to the additional floors of the building 9 is provided, and the extension prevention cylinder 10 is removably inserted into the plunger 4 which is slidably inserted into the cylinder 5 of the hydraulic jack 7.
The lower end of the extension preventing cylinder 10 is supported by the lower end of the plunger 4, and the upper end of the extension preventing cylinder 10 is placed at a predetermined height, so that the extension preventing cylinder 10 is removed from the plunger 4 when the floor is increased. A hydraulic elevator characterized by: