JPS607374Y2 - Hydraulic circuit for lifting device of elevated track switching track section - Google Patents

Description

[Detailed explanation of the invention] This invention consists of multiple girders (simple girders and continuous girders) for the switching track section of the elevated track, and each girder is temporarily supported on the conventional track and then lowered in sequence. This invention relates to a switching part elevating device in a direct elevated construction method that is set at a predetermined position.

The problem with elevated tracks is how to quickly connect the elevated tracks with conventional tracks.

In other words, quick connection is necessary to prevent disruption of the normal timetable due to connection (switching) work performed during non-operation times such as late at night.

The present invention proposes a hydraulic circuit for a lifting device for a switching track section of an elevated track that can solve these problems, and one embodiment thereof will be described below with reference to the drawings.

Figure 1 shows a basic example of the overhead elevated construction method.

That is, a supports a cross beam 2 at each of the upper ends of a plurality of columns 1, and further supports a simple girder 3 between the cross beams 2.

At this time, each simple girder 3 is on the same level as the elevated section 4.

In this state, the cross beams 2 except the cross beam 2 closest to the elevated section 4 are lowered by a predetermined amount, and the simple girder 3 closest to the elevated section 4 is tilted as shown by b.

Next, the cross beams 2 excluding the two cross beams are lowered by a predetermined amount from the elevated portion 4 side, and the second simple girder 3 is tilted as shown in C.

Through such operations, the third and fourth simple girders 3 are tilted one after another, and finally all the simple girders 3 are tilted as shown in d.

As shown in FIGS. 2 to 5, a lowering rod 5 is attached to the upper end of the support column 1, and a jack 7 that performs a measuring operation on a rod 6 suspended from the lowering rod 5 is attached to the horizontal beam. 2 via a thrust support member 36 (see FIG. 11).

The structure for attaching the upper end of the rod 6 to the lowering rod 5 is the sixth
As shown in the figure, a load equalizer 8 is attached to the upper surface of the descending shaft 5, a spherical seat 9 is attached to the piston portion 8A projecting upwardly of the load equalizer 8, and a spherical seat 9 is attached to the upper end of the rod passing through the spherical seat 9. A nut 10 is screwed into the threaded portion 6A.

In the state shown in FIG. 1a, the cross beam 2 is supported on the support column 1 side.

That is, as shown in FIGS. 2 to 5, the cross beam 2 is placed on a temporary bracket 11 connected to the support column 1 via a support 12.

This temporary bracket 11 is removed when the cross beam 2 is lowered and placed on the main bracket 13 provided at the lower part via the support 12.

That is, a hanging plate bracket 14 is connected from the top of the support 1, and a locking recess 15 is formed on its top surface, and a through hole 1 is formed in a pair of plates 16 connected from the top of the cross beam 2.
7 is provided.

Therefore, by receiving the pin inserted between the two award passage holes 17 in the locking recess 15, the cross beam 2 can be lifted from the temporary bracket 11 and supported on the support column 1 side, thereby making it possible to remove the temporary bracket 11. .

In addition, by pulling out the pin, the temporary bracket for hanging 1
The support of the cross beam 2 via 4 is released.

This extraction of the pin is carried out with the jack 7 slightly lifting the cross beam 2 to reduce resistance.

You can pull out the pins one by one, but if you pull them all out at once, it will be advantageous to speed up the work.

That is, as shown in FIG. 8, each pin 20 is connected to the main wire 19 from the winch 18 via the auxiliary wire 21, and the winch 18 is connected with all the cross beams 2 slightly lifted as described above. By actuating and winding up the main wire 19, all pins 20 can be extracted as shown in FIG.

As shown in FIG. 7, the rod 6 has a large number of locked step portions 6B in its length direction, and the
is configured to perform a measuring motion on this rod 6.

That is, the jack 7 consists of a cylinder 22, a first chuck 24 attached to the main body 23 side of the cylinder 22, and a second chuck 26 attached to the piston rod 25 side.

Both chucks 24 and 26 are formed into cylinders, and the movement of the piston rods 27 and 28 causes the operation parts 27A and 28A, which are integrated with the piston rods 27 and 28, to move into the collet (
29 and 30, which are divided on the circumference, to engage and disengage the collets 29 and 30 from the locked step portion 6B.

Therefore, the collet 29.30 for the locked step 6B
, the cylinder 22 expands and contracts to bring the first chuck 24 closer to the second chuck 26, and the second chuck 26 separates from the first chuck 24, causing the jack 7 to perform a measuring movement, thereby moving the cross beam 2 into the rod. 6.

The lowering of the cross beam 2 continues until the support 12 provided at its lower part contacts the main bracket 13. During the lowering, as shown in FIGS. 2 and 5, the guided portion on which the cross beam 2 is installed A guide portion 32 provided at 31 on the support 1 serves as a guide.

Although the embodiment shows a structure in which the guide portions 32 are provided on both sides of the support column 1, the guide portions 32 may be provided in the center.

In FIG. 1a, the cross beam 2 is supported by the temporary bracket 11 via the support 12, as described above.

When performing the lowering operation, first, the jack 7 is reversely operated to slightly lift all the cross beams 2, and then the pin 20 is inserted from the through hole 17 into the locking recess 15, and then the cross beam 2 is lowered. is supported by a temporary hanging bracket 14.

In this state, each temporary bracket 11 is removed from the support column 1.

Next, by reverse operation of the jack 7, the winch 18 is wound up while the cross beam 2 is slightly lifted, and each pin 20 is pulled out at once.

Next, the jack 7 is moved to make a measuring movement, and the cross beam 2 is lowered.

That is, a series of operations including engagement of the upper collet 29 with the locked step portion 6B, detachment of the lower collet 30, extension of the cylinder 22, engagement of the lower collet 30, detachment of the upper collet 29, and contraction of the cylinder 22. By doing this, the cross beam 2 is lowered intermittently.

A cross beam 2 whose guided portion 31 is guided by a guide portion 32
Eventually, the support 12 comes into contact with the main bracket 13, and the desired descent is completed.

Note that the load equalizer 8 is provided to eliminate the balance load on the left and right sides of the cross beam 2.

The lowering of the cross beam 2 as described above is carried out in accordance with the operation shown in FIG. 1, so that the hydraulic piping is shown in FIG.

That is, the jacks 7 installed on the left and right sides of the cross beam 2 are piped in series in the vertical direction.

When the simple girder 3 is lowered one after another from the elevated section 4 until it reaches a predetermined position as shown in FIG. Canceled.

At this time, since the capacity of the hydraulic pump in the pump unit 34 is constant, the amount of oil sent to the other jacks 7 increases, the time required for hydraulic operation is shortened, and switching can be performed in a short time.

Furthermore, since the piping is in series, there is a possibility that the jacks 7 installed on the left and right sides of the cross beam 2 may operate unevenly.

Therefore, the load equalizers 8 provided on the left and right jacks 7 of the cross beam 2 are connected via a load equalizer piping 35 to eliminate this imbalance.

As shown in Fig. 6, the load equalizer 8 has a structure that can be operated in each direction up and down, and if an imbalance occurs in the left and right jacks 7 of the cross beam 2, the cylinder operates to eliminate the imbalance. .

According to the present invention described above in the embodiments, the switching track section of the elevated track is composed of a plurality of girders, and each girder is connected to pillars erected at a predetermined interval on both sides via cross beams for supporting the girders. Hydraulic jacks for raising and lowering the cross beams were installed on the left and right sides of each cross beam, and these hydraulic jacks were arranged in series in the vertical direction and connected to the pump unit, so that the horizontal beams could be lowered sequentially from the elevated side. When the predetermined position is reached, the hydraulic oil supplied to it can be used for other lowering, thus increasing the amount of oil delivered to other jacks and reducing the time required for hydraulic actuation.

This allows the switching section to be switched (connected) in a short time.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and Fig. 1 (axd) is a front view showing a basic example of the overhead elevated construction method, Fig. 2 is a side view of the main parts,
FIG. 3 is a front view of the same, FIG. 4 is a sectional view taken along line AA in FIG. 2, FIG. 5 is a sectional view taken along line BB in FIG. FIG. 7 is a longitudinal cross-sectional view of the jack, FIGS. 8 and 9 are explanatory diagrams showing a stopper release type, FIG. 10 is a hydraulic piping diagram, and FIG. 11 is a schematic side view of the main parts. 1... Support column, 2... Horizontal beam, 3...
・・・Simple digit, 6・・・Rod, 6B・・・・・・
Locked stepped portion, 7... Jacket, 8... Mountain-dove equalizer, 11... Temporary bracket, 1
3... Main bracket, 14... Hanging bracket, 22... Cylinder, 24...
...1st chuck, 26...2nd chuck,
29.30...Collet, 33...Valve, 34...Pump unit, 35...
・・Piping for load equalizer.

Claims (1)

[Scope of utility model registration request] A hydraulic jack in which the switching track section of an elevated track is made up of multiple girders, each girder is temporarily supported on pillars erected at a predetermined interval on both sides via cross beams for girder support, and the horizontal beams are raised and lowered. A hydraulic circuit for a lifting device for a switching track section of an elevated track, characterized in that hydraulic jacks are provided on the left and right sides of each cross beam, and these hydraulic jacks are arranged in series in the vertical direction and connected to a pump unit.