JP2522443B2 - Indirect hydraulic elevator drive - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive device for an indirect hydraulic elevator that raises and lowers a car by means of a hydraulic jack, and more particularly to a mechanism for vertically guiding a plunger of the hydraulic jack along a guide rail. It is about improvement.

[Prior Art] Generally, a drive device for an indirect hydraulic elevator is provided with a hydraulic jack on a side of a car as disclosed in, for example, Japanese Patent Application Laid-Open No. 61-211288 and Japanese Patent Application Laid-Open No. 1-285574. The hydraulic jack is installed, a sheave is supported by the plunger of the hydraulic jack, a rope is hung on the sheave, and the rope can be pulled as the plunger moves up and down to drive the car. In a drive device for an indirect hydraulic elevator of this type, a mechanism for vertically guiding a plunger of a hydraulic jack along a guide rail has conventionally been configured as shown in FIGS. 3 to 5, for example.

FIG. 3 is a cross-sectional view of a hoistway showing a conventional indirect hydraulic elevator drive device, FIG. 4 is an enlarged front view of a main part of the drive device of FIG. 3, and FIG. 5 is a line AA of FIG. FIG.

In FIG. 3, 1 is a hoistway, 2 is a pit provided at the bottom of the hoistway 1, 4 is a jack stand installed in the pit 2, 5 is a hydraulic jack erected on the jack stand 4,
7 is a cylinder of the hydraulic jack 5, 6 is a plunger of the hydraulic jack 5, 8 is a sheave on which a rope (not shown) for pulling a car is hung, and 11 is erected on the hoistway 1 on both sides of the hydraulic jack 5. It is a pair of guide rails.

In FIGS. 4 and 5, 12 is a cap capped on the upper end of the plunger 6, 13 is a pair of front and rear support members made of channel steel material standing on the cap 12, and 14 is each support member 13. A guide arm laterally fixed to the upper end, 15 is a shaft that rotatably supports the sheave 8, 16 is a U-bolt that fixes both ends of the shaft 15 to substantially the center of the guide arm 14, and 17 is both ends of the guide arm 14. A rope detachment prevention rod erected on the section, 18 is a guide member slidably engaged with the guide rail 11, and 19 is a guide member 18
Are mounting brackets for mounting the guide arms 14 on both ends.

In the conventional indirect hydraulic elevator drive apparatus configured as described above, when the hydraulic jack 5 is driven,
The sheave 8 is raised and lowered integrally with the plunger 6, and the rope wound around the sheave 8 is towed to raise and lower the car. At this time, the plunger 6 is guided up and down along the guide rail 11 by the guide member 18 via the guide arm 14.

[Problems to be Solved by the Invention] However, according to the above-described conventional indirect hydraulic elevator drive device, since the upper portion of the sheave 8 is open,
There was a risk that the rope on the sheave 8 would be damaged by welding sparks and falling objects such as concrete fragments during the installation work. In addition, since the guide arm 14 is horizontally provided in the center of the sheave 8, and the guide members 18 are provided at both ends of the guide arm 14, the mounting bracket 19 is interposed in the narrow space between the sheave 8 and the guide rail 11. It was necessary to mount the guide member 18 by means of this, and it took a lot of time and labor for the work.

On the other hand, as another prior art, there is a technology described in Japanese Utility Model Laid-Open No. 56-124663. In the technique disclosed in this publication, a shaft support plate is attached to the upper end of the hydraulic jack, a sheave is attached to the shaft support plate, and a protective cover is arranged on the sheave. However, this protective cover is attached to the shaft support plate,
In addition, a flat bar with a guide member is attached to the front, back, left and right.
Since they are attached to the shaft support plate in pairs, the number of these components is large, and the work of attaching the components is very troublesome and inefficient. Further, since the flat bar is divided into left and right, mechanical stability is also a problem.

Therefore, an object of the present invention is to provide an indirect hydraulic elevator that can reliably protect the rope on the sheave from falling objects, can easily perform the work of mounting the guide member, and is mechanically rich in strength. It is to provide a drive device.

[Means for Solving the Problems] In order to solve the above problems, a drive device for an indirect hydraulic elevator according to the present invention includes a support member connected to a plunger of a hydraulic jack erected on the bottom of a hoistway. Protective covers laterally installed on a support member that covers the sheave rotatably supported in the vertical middle portion from above, and guide rails provided on both ends of the protective cover and standing on hoistways on both sides of the hydraulic jack. And a pair of flat bars that are disposed near the shaft of the sheave of the support member and that have a rope detachment prevention rod between both ends.

[Operation] According to the indirect hydraulic elevator drive device of the present invention,
Since the protective cover is provided so as to cover the sheave from above, the rope on the sheave can be reliably protected from falling objects by this protective cover. Also, when attaching the guide member to the protective cover, in a wide space above the sheave,
The mounting work can be easily performed without being hindered by the sheave. Moreover, the protective cover not only protects the rope on the sheave, but also has the function of guiding the plunger up and down along the guide rail together with the guide member. Since the supporting member is arranged by the flat bar, the device can be easily configured with a small number of parts.

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

1 is a front view showing a guide mechanism for a plunger in a drive device for an indirect hydraulic elevator according to an embodiment of the present invention, and FIG. 2 is a right side view of FIG. In the figure, the same reference numerals as those of the conventional example indicate the same or corresponding components as those of the conventional example.

In the figure, 6 is a plunger of the hydraulic jack 5 (see FIG. 3), and a cap 21 is provided with a pin 21 at the upper end thereof.
Has been fixed. On the upper surface of the cap 12, a pair of front and rear support members 13 made of a flat steel plate are bolted via a spacing metal fitting 22.
It is vertically fixed by 23. A shaft 15 is erected and supported between the central portions of the respective support members 13 in the up-down direction, and a rope (neither of which is shown) for pulling a car is wound around the shaft 15 as a sheave 8.
Are rotatably supported. Further, a pair of front and rear flat bars 24 are provided at the center of the support member 13 in the vertical direction by bolts 25.
Is fixed horizontally by means of a rope, and a rope detachment prevention rod 17 is installed between both ends thereof.

At the upper end of each of the support members 13, there is provided a side-face downward U-shaped protective cover 27 slightly longer than the outer diameter of the sheave 8.
Is laterally fixed by a bolt 28 at almost the center so as to cover the above. At both ends of this protective cover 27,
A guide member 18 slidably engaged with the guide rail 11 is attached by bolts 30 and 31 via a mounting bracket 29.
Further, the sheave 8 is installed on the upper surface of the central portion of the protective cover 27 during installation.
A hook 32 for suspending etc. is attached.

When assembling the drive device for the indirect hydraulic elevator according to the present embodiment configured as described above, first, the hydraulic jack 5 and the guide rail 11 are set in the state shown in FIG.
Installed inside. Then, the sheave 8, the cap 12, the support member 13, the flat bar 24, the protective cover 27, and the like, which are integrally assembled in advance, are suspended in the hoistway 1 using a lifting machine (not shown) such as a chain block. Be given off. At this time,
The lifting member of the lifting machine is a hook 32 provided on the protective cover 27.
Be hooked on. Then, the cap 12 is capped on the upper end of the plunger 6, and is joined by the pin 21. Then, with the guide member 18 engaged with the guide rail 11,
It is attached to both ends of the protective cover 27 by bolts 30 and 31 via 29.

In the indirect hydraulic elevator drive device assembled as described above, the hydraulic jack 5 is driven to move up and down the sheave 8 together with the plunger 6 and pull the rope wound around the sheave 8 as in the conventional case. The car is moved up and down. At this time, however, unlike the conventional case, the plunger 6 is guided up and down along the guide rail 11 by the guide member 18 via the protective cover 27 provided above the sheave 8.

As described above, the drive device for the indirect hydraulic elevator according to the present embodiment is provided with the hydraulic jack 5 standing upright in the pit 2 at the bottom of the hoistway 1 and the hoistway 1 on both sides of the hydraulic jack 5.
And a support member 13 connected to the plunger 6 of the hydraulic jack 5 via the cap 12
A sheave 8 rotatably supported by a shaft 15 at an intermediate portion in the up-down direction of the support member 13, and a downward U-shape laterally provided on the upper end of the support member 13 so as to cover the sheave 8 from above. Protective cover 27, guide members 18 attached to both ends of protective cover 27 via attachment fittings 29 so as to slidably engage guide rails 11, and hooks attached to the upper surface of the central portion of protective cover 27. It is composed of 32 and.

Therefore, according to the drive device for the indirect hydraulic elevator of the above-described embodiment, the protective cover 27 is provided so as to cover the sheave 8 from above, and thus the sheave 8 is protected by the protective cover 27.
The upper rope can be reliably protected from falling sparks such as welding sparks during installation or concrete debris. Further, when the guide member 18 is attached to the protective cover 27, the attaching work can be easily performed in a wide space above the sheave 8 without being obstructed by the sheave 8. Moreover, the protective cover 27 has the function of protecting the rope on the sheave 8,
Since it has the function of guiding the plunger 6 up and down along the guide rail 11 together with the guide member 18, the device can be easily configured with a small number of parts. Moreover, since the protective cover 27 is provided with the hook 32, the sheave 8 can be hoisted into the hoistway 1 and carried in at the time of installation, and can be easily assembled to the plunger 6 of the hydraulic jack 5. There is also an effect.

In the above embodiment, the protective cover 27 is formed in a downward U shape, but the present invention is not limited to this. For example, the protective cover 27 is formed as a flat plate that is longer and wider than the sheave 8. It is also possible to change the shape as desired. However, when the protective cover 27 is formed in a downward U-shape as in the above embodiment, the effect that the support structure of the guide member 18 can be made more robust is obtained.

[Advantages of the Invention] As described above, the drive device for an indirect hydraulic elevator according to the present invention is rotatably provided at an intermediate portion in the vertical direction of a support member connected to a plunger of a hydraulic jack erected on the bottom of a hoistway. A protective cover is provided laterally on a supporting member that covers the supported sheave from above, and slidably fits on guide rails provided at both ends of the protective cover and standing on the hoistway on both sides of the hydraulic jack. Since it is composed of a guide member and a pair of flat bars arranged near the shaft of the sheave of the supporting member and having a rope slip-off prevention rod between both ends, a rope on the sheave is dropped by the protective cover. From the above, the mechanical strength between the guide rail and the protective cover is increased, and the guide member can be easily attached to the protective cover without being obstructed by the sheave. Moreover, since the protective cover is provided with the function of protecting the rope and the function of guiding the plunger up and down, the supporting member is arranged by the pair of flat bars having the rope detachment preventing rods between the both ends. The device can be easily configured by the number of parts. Therefore, there is an effect that the rope on the sheave can be surely protected from a falling object, the work for attaching the guide member can be easily performed, and the mechanical structure can be solid.

[Brief description of drawings]

1 is a front view showing a guide mechanism of a plunger in a drive device for an indirect hydraulic elevator according to an embodiment of the present invention, FIG. 2 is a right side view of FIG. 1, and FIG. 3 is a conventional indirect hydraulic elevator. Sectional view of the hoistway showing the driving device of FIG.
FIG. 4 is an enlarged front view of the main part of the drive unit shown in FIG. 3, and FIG.
It is the sectional view on the AA line of a figure. In the figure, 1: hoistway, 5: hydraulic jack, 6: plunger, 8: sheave, 1
1: guide rail, 13: support member, 18: guide member, 27: protective cover. In the drawings, the same reference numerals and symbols indicate the same or relative parts.

Claims (1)

(57) [Claims] 1. A hydraulic jack erected on the bottom of a hoistway, guide rails erected on both hoistways of the hydraulic jack, a support member coupled to a plunger of the hydraulic jack, and the support. A sheave that is rotatably supported at an intermediate portion in the vertical direction of the member, a protective cover that is laterally provided on a support member that covers the sheave from above, and is slidable on the guide rails that are provided at both ends of the protective cover. And a pair of flat bars arranged near the shaft of the sheave of the support member and having rope disengagement rods between both ends of the support member. Elevator drive.