JPH09295778A - Power unit for hydraulic elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the inspection and maintenance of a hydraulic pump unit. SOLUTION: A temporary resting frame 18 is fixed to the upper part of the side surface of a oil tank 1. When a filter is to be replaced with a new one and the like with a hydraulic pump unit 3 pulled up out of the oil tank 1, the hydraulic pump unit 3 can thereby be raised up by a chain block 14 by transferring a control device 20 rested over an upper cover 1b over to the temporary resting frame 18. Even if the floor of a machine room 27 is narrow, there is no need for lowering the control device 20 down to the floor, and moreover, no removal of any electric wire 19 is required either. Therefore, inspection and maintenance can thereby be facilitated regardless of the requirements of the machine room 27.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a power unit for a hydraulic elevator.

[0002]

2. Description of the Related Art FIG. 8 is a vertical cross-sectional view showing an example of a conventional hydraulic elevator power unit and a hydraulic jack operated by this power unit. In FIG. 8, a pair of installation bases 28 are fixed to a floor 27a of a machine room 27 formed next to a pit of a hoistway in which a hydraulic elevator is installed, via anchor bolts (not shown).

An oil tank 1 for storing the hydraulic oil 2 is placed on these installation bases 28. Inside the oil tank 1, a pair of fixing frames (not shown) made of chevron steel are horizontally provided on the upper portions on both sides in the direction orthogonal to the paper surface in FIG. 8, and are fixed to the inner surface of the side wall of the oil tank 1. There is.

Inside these fixed frames, the upper and lower surfaces of an upper frame 21 having substantially the same shape as the above-mentioned fixed frame are placed, and these upper frames 21 are provided with upper ends of a pair of both screw bolts 15. The male threads penetrate vertically and are tightened with nuts 16 from above and below.

At the lower ends of these two-screw bolts 15, a lower frame 31 made of channel steel is fitted with a nut 16 screwed to the upper side.
And a double nut 16A screwed on the lower side, and is horizontally set in advance.

On the left side of the lower surface of the lower frame 31, the electric motor 5 constituting the hydraulic pump unit 3 is suspended by four bolts. On the right side of the electric motor 5, a hydraulic pump 4
The filter 4a is mounted on the right-hand suction side of the hydraulic pump 4.

A lower end of a discharge pipe 6 is connected to a discharge port formed on the upper left side of the hydraulic pump 4, and the upper end of the discharge pipe 6 penetrates the upper cover 1a of the oil tank 1 through a packing (not shown). are doing.

The upper end of the discharge pipe 6 is connected to the lower inlet of the flow control valve 7, and the left return port of the flow control valve 7 is connected to the upper right end of the substantially L-shaped return pipe 10. Has been done. The left side of the reflux pipe 10 penetrates a packing (not shown) provided at the left end of the ceiling plate 1a of the oil tank 1, and the lower end is
It hangs on the lower left side of the oil tank 1.

The left end of the pipe 23 is connected to the right end of the flow control valve 7 through a check valve (not shown).
Is connected to the lower end of a hydraulic jack 8 standing on the hoistway through a hoistway pit (not shown).

At the upper end of the plunger 8a protruding upward from the hydraulic jack 8, there is shown a car 9 guided by upper and lower guide rollers with respect to guide rails (not shown) which are vertically provided on both sides of a hoistway (not shown). Has been done.

A hydraulic pump unit 3 is provided on the upper surface of the oil tank 1.
A control device 20 for controlling the hydraulic jack 8 and the like via the legs is mounted via the legs 20a. The leg portion 20a is manufactured by butt welding of angle steel, and is attached to the lower surface of each of the four corners at the lower end of the leg portion 20a via vibration-proof rubbers (not shown). In the figure, it is fixed to the left end with a bolt.

A dozen or more multi-core connectors are attached to the side surface of the upper end of the control device 20, and these multi-core connectors are connected to the car 9 and hoistways and hall switches, signal lights, and other external connections. The electric wire 19 is connected through the connector.

In the hydraulic elevator power unit constructed as described above, for example, when the car 9 is raised, the hydraulic oil discharged from the hydraulic pump 4 driven by the electric motor 5 through the discharge pipe 6 is indicated by an arrow A. As shown in FIG. 3, the flow rate control valve 7 flows in, and most of it is supplied to the hydraulic jack 8 via the pipe 23 as shown by arrow B. Then, the plunger 8a of the hydraulic jack 8 rises, and the car 9 also rises in the hoistway as shown by an arrow D.

On the contrary, when the car 9 is lowered, the hydraulic oil inside the cylinder of the hydraulic jack 8 is actuated by the operation of the flow control valve 7 from the pipe 23 and the flow control valve 7 through the return pipe 10 to the oil tank 1. Circulate inside.

At this time, the ascending / descending speed of the car 9 is proportional to the flow rate of the working oil controlled by the valve angle of the flow control valve 7, and the valve angle of the flow control valve 7 is set in the machine room. It is controlled by the control panel 20.

By the way, in the power unit of the hydraulic elevator constructed as described above, it is stipulated by law that the maintenance and inspection of the power unit of the hydraulic elevator is regularly performed for the safety of the passengers in the car 9. At that time, the above-described inspection of the filter 4a and the like are also performed, and the filter 4a is replaced if necessary.

FIG. 9 shows a controller for this periodical inspection.
20 and the flow control valve 7 are removed and temporarily placed on the floor 27a, and the chain block 14 that suspends the hydraulic pump unit 3 from the inside of the oil tank 1 is suspended on the ceiling 12 of the machine room 10. It is a side view.

In FIG. 9, the ceiling 12 of the machine room 10 has an anchor bolt 30 in which an upper portion of a substantially T-shaped support 13 in a right side view (not shown) is driven into the ceiling 12 from below.
It is installed in advance via.

The hook hole formed at the center of the support 13 has a hook projecting from the upper end of the chain block 14.
11A is inserted, and as a result, the lower end of the chain 36 hanging from the chain block 14 is immersed in the hydraulic oil 2 in the oil tank 1. Further, the hook 11B connected to the lower end of the chain 36 is inserted into a U-shaped bolt 31a protruding from the upper end of the lower frame 31 by a maintenance worker.

When lifting the hydraulic pump unit 3,
A maintenance person operates the upper portion of the chain 36 to rotate the inside of the chain block 14 and pulls up the hydraulic pump unit 3 from the oil surface 29 of the oil tank 1 from which the upper cover has been removed in advance until the filter 4a is exposed.

By the way, on the ceiling 12 of the machine room 28, there are installed a fluorescent lamp for the installation work of the power unit and the like in the machine room 28, the above-mentioned maintenance and inspection work, an exhaust duct and a soundproof material. Pre-installed.

[0022]

However, due to the specifications of the building in which the hydraulic elevator is installed, the machine room 27 is narrow and the piping connected to the hydraulic jack 8 or the like provides a temporary place for the control device 20 to be installed. It may not be possible.

Further, even if the space can be secured, the external connection electric wire 19 must be disconnected in order to lower the control device 20 to the floor 27a, and after the power unit is inspected, the control device 20 is placed in the oil tank 1. After mounting it must be reconnected. Moreover, this operation must be completed within a limited time for inspection work of other equipment. Then, the objective of this invention is to obtain the power unit of the hydraulic elevator which can perform maintenance and inspection of a hydraulic pump unit easily.

[0024]

According to a first aspect of the present invention, there is provided a hydraulic elevator power unit including an oil tank in which a hydraulic pump unit suspended by an upper cover is housed, and hydraulic oil is injected, and one side surface of the oil tank. And a temporary placement frame on which an upper end surface of the upper cover is attached in the same manner as the upper end surface of the upper cover and the control device installed on the upper surface of the upper cover is transferred.

The power unit of the hydraulic elevator according to the second aspect of the invention is characterized in that a plurality of wheels are provided at the lower end of the control device.

The power unit of the hydraulic elevator according to the third aspect of the invention is characterized in that a lifting support frame for supporting a lifting tool for suspending and lifting the hydraulic pump unit is provided on one side surface of the control device. To do.

Further, the power unit of the hydraulic elevator according to a fourth aspect of the present invention is provided with a hinge having one side fixed to the upper end of the rear portion of the temporary placement frame and the other side fixed to the front end of the lower end of the control device. And

Further, in the power unit of the hydraulic elevator according to the invention described in claim 5, a pulley is hung vertically above the upper cover, one side of which is fixed to the control device and the other side of which is connected the upper cover. The feature is that the middle part is wound around a pulley.

By means of such means, in the hydraulic elevator power unit according to the first and second aspects of the invention, when the power unit is maintained and inspected, the control device is moved from the upper cover to the temporary frame. List. Further, in the invention according to claim 3, the hydraulic unit is lifted from the oil tank via the lifting support tool supported by the control device transferred to the temporary placement table.

Further, in the invention described in claim 4,
When servicing and inspecting the hydraulic pump unit, the control device is swung with the hinge shaft as the swing shaft and transferred to the temporary stand. Further, in the invention according to claim 5, the hydraulic unit is pulled up from the oil tank by utilizing the weight of the control device that swings with the hinge shaft as the swing shaft.

[0031]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a power unit for a hydraulic elevator according to the present invention will be described below with reference to the drawings. FIG. 1 is a vertical sectional view showing an embodiment of a power unit for a hydraulic elevator according to the present invention, corresponding to FIGS. 8 and 9 shown in the related art and corresponding to claims 1 and 3. .

In FIG. 1, what is different from FIGS. 8 and 9 shown in the prior art is that a temporary placement frame for transferring the control device is fixed to the upper part of one side surface of the oil tank 1. That is, the hydraulic pump unit is suspended on the upper cover of the oil tank 1. Therefore, the same parts as those in FIGS. 8 and 9 are designated by the same reference numerals, and the duplicated description will be omitted.

That is, in the upper portion of the left side surface of the oil tank 1 in FIG. 1, angle steel is butt-welded in an L-shape, and then reinforcements 18a are welded, and both sides of the upper end are temporarily connected to each other by angle steel. The frame 18 is fixed. This temporary placing frame 18 is installed by a maintenance person at the time of maintenance and inspection, and normally, between the hydraulic unit and the building wall, the provisions stipulated by law (Ministry of Construction Notification No. 1675 of 1982). It has been removed to ensure a space (50 cm), and maintenance personnel will bring it in from the jig warehouse of the maintenance company.

The upper cover is divided into an upper cover 1a on the right side and a narrow upper cover 1b on the left side of the upper cover 1a from the middle portion in FIG. The pair of reinforcements 1c are pre-joined by spot welding, and the control device 20 is mounted on the upper surface of the left upper cover 1b via the leg portions 20a.

Of these, the right upper cover 1a has 4
The upper ends of the two screw bolts 15 of the book penetrate and are fixed by nuts 16, and the hydraulic pump unit 3 is suspended on the lower ends of these screw bolts 15.

In the hydraulic elevator power unit thus constructed, the hydraulic pump unit 3 is maintained and
When inspecting, the control device 20 fixed to the upper surface of the upper cover 1b is moved to the temporary placing frame 18 by 3 to 4 maintenance personnel, and the diagonal portions of the legs 20a are bolted to the temporary placing frame 18. Fix it temporarily. In this state, the chain block 14 is operated to lift the hydraulic pump unit 3 together with the upper cover 1a, and the filter of the hydraulic pump is replaced.

In the power unit of the hydraulic elevator constructed as described above, the hydraulic pump unit 3 can be operated by merely moving the control unit 20 by the maintenance personnel by the width W of the control unit 20 as shown by the arrow A in FIG. Can be pulled up from the oil tank for inspection, and it is not necessary to remove the external connection electric wire 19, so that maintenance and inspection can be performed easily and in a short time even when the machine room has a narrow installation condition.

Next, FIG. 2 is a plan view showing a second embodiment of the power unit of the hydraulic elevator according to the present invention.
FIG. 8 is a view corresponding to a plan view of the power unit of the hydraulic elevator shown in FIG.

2 is different from FIG. 1 in that the width W of the control device is narrow, and the temporary placement frame 18 shown in FIG.
Compared with the above, a smaller temporary placement frame 18A is fixed to the oil tank, and the right side portion of the control device 20A in FIG. 2 is mounted on the upper cover 1b of the oil tank 1. In this case, even if the space to the side wall of the machine room is smaller than that in FIG.
There is an advantage that A can be attached.

FIG. 3 shows a third embodiment of the power unit of the hydraulic elevator according to the present invention and is a view corresponding to FIG. In FIG. 3, the temporary placement frame 18B is attached to the rear side in FIG. 3, that is, only to the electric motor 5 side, and the control device 20 is also moved to the left by the angle θ only in the rear side.

For this reason, in FIG. 3, the anti-vibration rubber 24 on the front left side is operated with the nut slightly loosened. Even in this case, as shown in FIG. 3, by moving one side of the control device 20 by the width of the electric motor 5 and the pump 4, the work is further facilitated, and the control device 20 is not likely to fall down during movement. Be safe.

Next, FIG. 4 is a view showing a fourth embodiment of the power unit of the hydraulic elevator according to the present invention, and is a view corresponding to FIGS. 1, 2 and 3. In FIG. 4, FIG.
The difference from FIGS. 2 and 3 is that the leg portion 20a of the control device 20 is different.
The wheels 22 are provided on the front and back of the lower end of the temporary holding frame 18, and a stopper 18a made of angle steel is added to the left end of the upper surface of the temporary placing frame 18 by welding.

In this case, in FIG. 1, FIG. 2 and FIG. 3, while the control device 20 was moved by a plurality of workers, the fixing metal fittings 18 attached to both side surfaces of the leg portion 20a were used.
It can be easily moved by removing the bolts fixed to the upper cover 1b via b. A pair of guide rails formed by press-molding a thin mild steel plate into a trough shape having a U-shaped cross section may be joined to the upper surface of the upper cover 1b by spot welding.

Next, FIG. 5 is a view showing a fifth embodiment of the power unit of the hydraulic elevator according to the present invention, and is a view corresponding to FIGS. 1, 2, 3 and 4. In FIG.
The difference from FIGS. 1 to 4 is that a lifting support frame 28 of the same shape as the lower temporary placement frame 18 and slightly larger is erected on the right side surface in FIG. 5 of the control device 20, By suspending the chain block 14 on the lifting support frame 28, the hydraulic pump unit can be lifted upward during maintenance and inspection.

That is, on the right side surface of the control device 20 in FIG. 5, a plurality of lifting support frames 28, which are manufactured by welding and joining the angle steel, are provided in the same manner as the lower temporary placement frame 18 described in FIG. It is erected with bolts. The support tool 13 shown in FIGS. 1, 4 and 7 is fixed to the upper end of the lifting support frame 28 with bolts, and the chain block 14 is suspended from the support tool 13.

In the power unit of the hydraulic elevator constructed as described above, it is not necessary to suspend the chain block 14 on the ceiling 12 of the machine room, and the ceiling 12 of the machine room is
Since the restrictions on the mounting position of the chain block 14 due to the ducts, lighting equipment, etc. arranged in the above are eliminated, the hydraulic pump unit can be lifted regardless of the specifications of the machine room or the power unit.

The bolt holes for fixing the lifting support 13 to the control device 20 can be shared by power units having different types and ratings by continuously providing elliptical holes long in the vertical direction. it can.

Next, FIG. 6 is a view showing a sixth embodiment of the power unit of the hydraulic elevator according to the present invention, and is a view corresponding to FIGS. 1 to 5. 6 is different from FIGS. 1 to 5 in that the movement mode of the control device 20 is changed from horizontal movement to falling movement. Therefore, at the right end of the upper surface of the temporary frame 18, one side of the pair of hinges 25 is fixed with a bolt,
The other side of each hinge 25 is fixed to the lower left side surface of the leg 20a.

In FIG. 6, the control device 20 is turned over to the left side,
Shown in a state where the left side of the control device 20 is in contact with the temporary placement frame 18, and after maintenance and inspection are completed, a hanging bolt (not shown) that fixes the hook 11B at the lower end of the chain block 14 to the upper end of the control device 20. , And operate the chain block to return the control device 20 to the installed state.

On the contrary, the same operation is performed when the device is turned over as shown in FIG. In this case, by using the chain block for moving the control device, not only the labor of the work is reduced, but also the attachment of the wheel 22 to the leg 20a shown in FIG. 4 and the rail are not necessary. There are advantages.

FIG. 7 is a view showing a seventh embodiment of the power unit of the hydraulic elevator according to the present invention and is a view corresponding to FIGS. 1 to 6. In FIG. 7, what is different from FIGS. 1 to 6 is that with respect to the support 13 fixed to the ceiling 12 of the machine room,
A wire rope 31 that suspends a pulley 31 and is wound around the pulley 31.
This means that one side of a is locked to the central portion of the back surface of the control device 20, and the hook 11B on the other side of the wire rope 31a is locked to the hook of the upper cover 1a.

In the power unit of the hydraulic elevator constructed as described above, the weight of the control device 20 can be utilized for lifting the hydraulic pump unit 3, so that when the weight of the hydraulic pump unit 3 is comparatively light. , The use of chain block can be omitted.

[0053]

As described above, according to the first aspect of the present invention,
An oil tank in which a hydraulic pump unit suspended in the upper cover is stored and hydraulic oil is injected, and a control device installed on the upper surface of the upper cover with the upper end surface being attached to one side surface of this oil tank in the same way as the upper end surface of the upper cover. According to the invention of claim 2, a plurality of wheels are provided at the lower end of the control device, and the control device is moved from the upper cover to the temporary placement frame. Therefore, it is possible to obtain a power unit for a hydraulic elevator that enables easy maintenance and inspection of the hydraulic pump unit.

According to the third aspect of the present invention, a lifting support frame for supporting a lifting tool for suspending and ascending / descending the hydraulic pump unit is provided on one side surface of the control device so that the lifting device can be moved to the temporary stand. Via the lifting support supported by the
Since the hydraulic unit is pulled up from the oil tank, it is possible to obtain a power unit for a hydraulic elevator that allows easy maintenance and inspection of the hydraulic pump unit.

Further, according to the invention described in claim 4, by providing a hinge whose one side is fixed to the rear portion of the temporary placement frame and the other side is fixed to the front end of the lower end of the control device, the axis of the hinge is swung. Since the control device was swung as an axis and transferred to the temporary table,
It is possible to obtain a power unit for a hydraulic elevator that enables easy maintenance and inspection of the hydraulic pump unit.

Further, according to the invention described in claim 5,
A pulley is hung vertically above the upper cover, and one end of the rope is fixed to the control device and the other end of the rope is locked to the pulley. Since the hydraulic pump unit is pulled up from the oil tank by utilizing the weight of the swinging control device, it is possible to obtain the power unit of the hydraulic elevator that enables easy maintenance and inspection of the hydraulic pump unit.

[Brief description of drawings]

FIG. 1 is a partial vertical sectional view showing a first embodiment of a power unit of a hydraulic elevator according to the present invention.

FIG. 2 is a partial plan view showing a second embodiment of the power unit of the hydraulic elevator according to the present invention.

FIG. 3 is a partial plan view showing a third embodiment of the power unit of the hydraulic elevator according to the present invention.

FIG. 4 is a partial vertical sectional view showing a fourth embodiment of the power unit of the hydraulic elevator according to the present invention.

FIG. 5 is a partial vertical sectional view showing a fifth embodiment of the power unit of the hydraulic elevator according to the present invention.

FIG. 6 is a partial vertical sectional view showing a sixth embodiment of the power unit of the hydraulic elevator according to the present invention.

FIG. 7 is a partial vertical sectional view showing a seventh embodiment of the power unit of the hydraulic elevator according to the present invention.

FIG. 8 is a partial vertical sectional view showing an example of a conventional hydraulic elevator power unit.

FIG. 9 is an explanatory diagram showing an operation of a power unit of a conventional hydraulic elevator.

[Explanation of symbols]

1 ... Oil tank, 2 ... Hydraulic oil, 3 ... Hydraulic pump unit, 4 ...
Hydraulic pump, 5 ... Electric motor, 6 ... Discharge pipe, 7 ... Flow control valve, 8 ... Hydraulic jack, 9 ... Basket, 10 ... Recirculation pipe, 11A,
11B ... Hook, 12 ... Ceiling, 13 ... Supporting tool, 14 ... Chain block, 15, 15A ... Double screw bolt, 16, 16B, 16C ... Nut, 16A ... Double nut, 17 ... Hydraulic oil, 18, 18A, 18
B ... Temporary frame, 19 ... External connection electric wire, 20, 20A ... Control device,
21, 21A, 21B, 21C ... Upper frame, 22 ... Wheels, 23 ... Piping, 24
… Anti-vibration rubber, 25… Hinge, 26… Pneumatic compressor, 27…
Machine room, 28 ... Lifting support frame, 29 ... Hinge, 30 ... Anchor bolt, 31 ... Pulley, 31a ... Rope.

Claims (5)

[Claims] 1. An oil tank in which a hydraulic pump unit suspended in an upper cover is housed and hydraulic oil is injected, and an upper end surface of one side surface of the oil tank is attached to the upper end surface of the upper cover in the same manner. A power unit of a hydraulic elevator including a temporary placement frame on which a control device installed on an upper surface is transferred. 2. A power unit for a hydraulic elevator according to claim 1, wherein a plurality of wheels are provided at a lower end of the control device. 3. The hydraulic system according to claim 1, wherein a lifting support frame for supporting a lifting tool for suspending and lifting the hydraulic pump unit is provided on one side surface of the control device. Elevator power unit. 4. A power unit for a hydraulic elevator according to claim 1, further comprising a hinge, one side of which is fixed to a rear portion of an upper end of the temporary placement frame and the other side of which is fixed to a front end of a lower end of the control device. . 5. A pulley is hung vertically above the upper cover,
The power unit of the hydraulic elevator according to claim 4, wherein an intermediate portion of a rope, one side of which is fixed to the control device and the other side of which is connected to the upper cover, is wound around the pulley.