JPH07117951A - Indirect hydraulic elevator - Google Patents

Abstract

PURPOSE:To omit the adding work of a guide rail when an upper hoistway is jacked up. CONSTITUTION:This indirect hydraulic elevator is provided with an auxiliary guide rail 20 fixed with the lower end to the bottom face of a lower hoistway 2 and provided in parallel with a guide rail 9, and an auxiliary guide roller 24 installed at the lower end of a car 8 and coupled with the auxiliary guide rail 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indirect hydraulic elevator in which an upper hoistway can be jacked up with respect to a lower hoistway as a measure against ground subsidence.

[0002]

2. Description of the Related Art FIG. 8 shows an indirect hydraulic elevator described in, for example, Japanese Patent Laid-Open No. 3-67885. In the figure, reference numeral 1 denotes a hoistway, in which an upper hoistway 3 is installed so as to be vertically movable with respect to a lower hoistway 2 buried in the ground. Reference numeral 4 is a hydraulic jack arranged on the far side of the hoistway 1, and a pulley 5 is installed at the upper end thereof. Reference numeral 6 is a rope whose one end is locked to the lower hoistway 2 by a shackle 7, and the other end is wrapped around a pulley 5 and connected to an end of a car 8. 9 is a guide rail attached to the upper hoistway 1 by a fixture 10,
Reference numerals 11 are guide rollers installed at the upper and lower ends of the car 8, respectively.

Next, the operation of the above conventional indirect hydraulic elevator will be described. Now, when the hydraulic jack 4 is operated, the pulley 5 is lifted by the hydraulic jack 4 and the car 8 is raised to the position indicated by the chain double-dashed line. Also,
In case of emergency such as disconnection of rope 3, emergency stop device 1
2 meshes with the guide rail 9 to prevent the car 8 from falling. In the indirect hydraulic elevator, since the car 8 is suspended by the rope 6 at a position deviated from the center of gravity of the car in this manner, the force that tries to tilt the car 8 toward the front side of the hoistway 1 always works, Is supported by the guide rail 9. By the way, in this elevator, if a part of the building is buried under the ground due to ground subsidence, for example,
The upper hoistway 3 is jacked up to keep the height of the building constant.

[0004]

However, since the above-mentioned indirect hydraulic elevator is constructed in this way, when the upper hoistway 3 is jacked up, the guide rail 9 is also lifted, and its lower end and lower hoistway. In the worst case, the guide roller 11 of the car 8 is disengaged from the guide rail 9 when the car 8 descends, and the car 8
There was a problem that there is a risk of falling. Further, for example, when the rope 9 is cut and the emergency stop device 12 is activated, the braking load of the car 8 is applied to the guide rail 9,
There is also a problem that the guide rail 9 is pushed down by the gap, and in the worst case, the car 8 may collide with the bottom surface of the lower hoistway 2. Therefore, when the upper hoistway 3 was jacked up, the guide rail was added to the lower end of the guide rail 9 by the amount of the above-mentioned gap. However, such work not only takes time but also the elevator stop time is long. Therefore, there was a problem that it would lead to deterioration of service to customers.

The present invention has been made in order to solve the above problems, and mainly aims at obtaining an indirect hydraulic elevator which does not require additional guide rails even when the upper hoistway is jacked up. To aim.

[0006]

SUMMARY OF THE INVENTION An indirect hydraulic elevator according to claim 1 of the present invention has an auxiliary guide rail having a lower end fixed to the bottom surface of a lower hoistway, and an auxiliary guide rail juxtaposed at the lower end of the guide rail, and a car. And an auxiliary guide roller that is installed at the lower end of the and that engages with the auxiliary guide rail.

The indirect hydraulic elevator according to claim 2 is
In claim 1, an emergency stop device is provided which extends the upper end of the auxiliary guide rail to near the entrance on the uppermost floor and engages with the auxiliary guide rail to brake the car.

An indirect hydraulic elevator according to claim 3 is
In claim 1 or claim 2, a tapered portion is formed on the side surface of the upper end of the auxiliary guide rail on the transfer side of the auxiliary guide roller.

An indirect hydraulic elevator according to claim 4 is
In Claim 1 or Claim 2, the upper end of the auxiliary guide rail is bent to the side opposite to the guide roller.

An indirect hydraulic elevator according to claim 5 is
In any one of claims 1 to 4, a guide tool for holding an intermediate portion of the auxiliary guide rail movably in the vertical direction is provided in the upper hoistway.

[0011]

In the indirect hydraulic elevator according to claim 1,
Even when the upper hoistway is jacked up, the lower end of the auxiliary guide rail is fixed to the bottom surface of the lower hoistway and remains stationary. That is, the auxiliary guide rails are arranged side by side at the lower end of the guide rails without forming a gap with the lower hoistway. Then, when the car is lowered to the lowest floor in this state, the auxiliary guide rollers provided at the lower end thereof are guided by the auxiliary guide rails to roll.

In the indirect hydraulic elevator according to the second aspect, the emergency stop device engages with the auxiliary guide rail when the rope is cut to stop the car.

In the indirect hydraulic elevator according to the third aspect, when the car is lowered to the lowest floor, the auxiliary guide roller smoothly rides on the taper portion at the upper end of the auxiliary guide rail and rolls.

In the indirect hydraulic elevator according to the fourth aspect, when the car is lowered to the lowest floor, the auxiliary guide roller rides smoothly on the bent portion of the auxiliary guide rail and rolls.

In the indirect hydraulic elevator of claim 5, when the upper hoistway is jacked up, the guide tool ascends while holding the auxiliary guide rail, so that the auxiliary guide rail is prevented from being deformed.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. Example 1. FIG. 1 shows an indirect hydraulic elevator of the present invention. It should be noted that reference numerals 1 to 12 are the same as those of the conventional example shown in FIG. In the figure, reference numeral 20 is an auxiliary guide rail provided in parallel at the lower end of the guide rail 9, and the lower end thereof is fixed to the bottom surface of the lower hoistway 2 by a fixture 21. Reference numeral 22 denotes a guide tool attached to the upper hoistway 3, which holds the intermediate portion of the auxiliary guide rail 20 in the upper hoistway 3 so as to be vertically movable. The guide tool 22
Has a structure in which the auxiliary guide rail 20 is sandwiched by a pair of rollers 23, 23 installed in the upper hoistway 3. Reference numeral 24 denotes an auxiliary guide roller installed at the lower end of the car 8 so that when the car 8 is lowered to the lowest floor, it is mounted on the upper end of the auxiliary guide rail 20.

In the indirect hydraulic elevator thus constructed, when the upper hoistway 3 is jacked up due to the subsidence of the ground, the guide rail 9 rises together with the upper hoistway 3 as shown in FIG. Although there is a gap between the lower hoistway 2 and the lower hoistway 2, the auxiliary guide rail 20
It is fixed to and stays as it is. At this time, the pair of guide rollers 23, 23 moves up while sandwiching the auxiliary guide rail 20.

Example 2. In this embodiment, as shown in FIG. 4, the upper end of the auxiliary guide rail 20 is extended to the vicinity of the entrance 25 on the uppermost floor, and the emergency stop device 12 is engaged with the auxiliary guide rail 20. In this way, the braking load of the car 8 is entirely applied to the auxiliary guide rail 20 when the emergency stop device 12 is activated, and the guide rail 9 is not likely to be pushed down.

Embodiments 3 and 4. By the way, in order to allow the auxiliary guide rollers 24 to smoothly roll on the auxiliary guide rails 20 when the car 8 is lowered to the lowest floor,
As shown in FIG. 5, a tapered taper portion 25 may be provided on the side surface 20a of the upper end of the auxiliary guide rail 20 on which the guide roller 24 rolls. Alternatively, as shown in FIG. 7, the upper end of the auxiliary guide rail 20 is fixed to the guide roller 24.
Just fold it to the opposite side. This way,
The guide roller 24 smoothly rides on the upper end of the auxiliary guide rail 20, and the impact of the guide roller 24 when riding is suppressed low.

[0020]

Since the present invention is constituted as described above, it has the following effects.

According to the first aspect, the lower end is fixed to the bottom surface of the lower hoistway, and the auxiliary guide rail is provided side by side with the lower end of the guide rail. The auxiliary guide rail is installed at the lower end of the car and engages with the auxiliary guide rail. Since an auxiliary guide roller is provided, the auxiliary guide rail is installed at the lower end of the guide rail even when the upper hoistway is jacked up, and there is no need for additional guide rail work that would have to be done by stopping the elevator. And help improve customer service.

Further, according to claim 2, when the rope is cut, for example, the emergency stop device engages with the auxiliary guide rail to stop the car, so that the effect of claim 1 can be obtained and the guide can be obtained. The rail is pushed down,
There is no risk of the car colliding with the bottom of the lower hoistway.

Further, according to claim 3, when the car is lowered to the lowest floor, the auxiliary guide roller rolls up smoothly on the taper portion of the upper end of the auxiliary guide rail and rolls. The effect can be obtained and the impact of the car can be suppressed.

Further, according to claim 4, when the car is lowered to the lowest floor, the auxiliary guide roller smoothly rides on the bent portion of the auxiliary guide rail and rolls. Therefore, the same effect as in claim 3 is obtained. Can be obtained.

Further, according to claim 5, since the auxiliary guide rail is supported by the upper hoistway by the guide tool, the effects of claims 1 to 4 can be obtained, and the installation strength of the auxiliary guide rail can be obtained. Can be improved and deformation of the auxiliary guide rail can be prevented.

[Brief description of drawings]

FIG. 1 is a sectional view of an indirect hydraulic elevator showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a state in which the upper hoistway of FIG. 1 is jacked up.

FIG. 3 is a sectional view of an indirect hydraulic elevator showing a second embodiment of the present invention.

FIG. 4 is a diagram showing a state where the upper hoistway of FIG. 3 is jacked up.

FIG. 5 is a view showing the third embodiment of the present invention and is a plan view showing the upper end of the auxiliary guide rail.

FIG. 6 is a front view of FIG.

FIG. 7 is a sectional view of an indirect hydraulic elevator showing a fourth embodiment of the present invention.

FIG. 8 is a sectional view showing an example of a conventional indirect hydraulic elevator.

[Explanation of symbols]

 1 Hoistway 2 Lower hoistway 3 Upper hoistway 4 Hydraulic jack 8 Car basket 9 Guide rail 11 Guide roller 20 Auxiliary guide rail 21 Fixing tool 22 Guide tool 23 Roller 24 Auxiliary guide roller 25 Tapered section 26 Bending section

Claims (5)

[Claims] 1. An indirect hydraulic elevator in which an upper hoistway is movably installed in a lower hoistway buried in the ground and a car is lifted and lowered along a guide rail of the upper hoistway. An auxiliary guide rail fixed to the bottom of the hoistway and provided in parallel at the lower end of the guide rail; and an auxiliary guide roller installed at the lower end of the car and moving along the auxiliary guide rail. A characteristic indirect hydraulic elevator. 2. An emergency stop device for extending the upper end of the auxiliary guide rail to the vicinity of the doorway on the uppermost floor and engaging the auxiliary guide rail to brake the car is provided in the car. The indirect hydraulic elevator according to claim 1. 3. The indirect hydraulic elevator according to claim 1, wherein a tapered taper portion is formed on the side surface of the upper end of the auxiliary guide rail on the rolling side of the auxiliary guide roller. 4. The indirect hydraulic elevator according to claim 1, wherein the upper end of the auxiliary guide rail is bent to the side opposite to the auxiliary guide roller. 5. The indirect hydraulic system according to claim 1, wherein a guide tool for holding an intermediate portion of the auxiliary guide rail movably in the vertical direction is provided in the upper hoistway. elevator.