JPH0558592A - Hydraulic jack device and synchronous operating method of hydraulic jack device - Google Patents

Abstract

PURPOSE:To miniaturize a cylinder for clamping and smoothen extrusion and retraction of a pin without being restricted by the selection of the installation place of a reaction force receiving beam, and with little fear of breakage of the cylinder for clamping by providing a hydraulic jack and cylinders for upper/ lower clamps on an axial line to constitute them in a integrated construction. CONSTITUTION:A hydraulic jack device (A) that vertically moves along a reaction force receiving beam wherein clamp pin locking holes are drilled on both side walls in the form of facing each other at a fixed pitch is provided. And, the hydraulic jack device (A) is constituted in integrated construction wherein a cylinder 2 for upper clamp is fixed to one end of the cylinder main body 4 of a hydraulic jack 1 in a direction vertical to its axis, and a cylinder 3 for lower clamp is fixed to the top end of the piston rod 5 of the hydraulic jack 1 in a direction vertical to its axis. Because of this construction, the cylinders 2, 3 for clamps can be compactly housed in the both side walls of the reaction force receiving beam.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic jack device of the type that moves up and down along a reaction force receiving beam in a worm-like manner and its synchronizing operation method, and mainly relates to a heavy object having a relatively large projected area. It is used for raising and lowering.

[0002]

2. Description of the Related Art In order to raise and lower a lifted body 60 having a large projected area such as a foundation, floor, and hull, a hydraulic jack device 61 that moves up and down around the lifted body 60 is usually used as shown in FIG. A plurality of reaction force receiving beams 62 provided are erected, and the plurality of hydraulic jack devices 61 are synchronously moved up and down along the reaction force receiving beams 62 to lift or lower the lifted body 60 to a predetermined position. Many methods of suspension are adopted.

As the hydraulic jack device 61, as shown in FIGS. 9 and 10, a hydraulic jack 63, a lower engaging base 65 having a pin insertion hole 64 fixed to the lower end of the hydraulic jack 63, and a jack rod. An upper locking base 67 fixed to the tip of 66, a lower clamp cylinder 69 connected to the lower locking base 65 via a support piece 68, and an upper clamp connected to the upper locking base 67 via a support piece 70. A hydraulic jack device 61 including a working cylinder 71 has been developed. The hydraulic jack 63 and the upper and lower clamping cylinders 69 and 71 are operated in a predetermined order to extend or shorten the jack rod 66, and each clamp pin. By inserting (or pulling out) 72, 73 into the pin insertion hole 74 provided in the reaction force receiving beam 62, the load receiving base 75 can have a constant pitch. It is moved up and down in (JP-A-49-1
11089).

[0004]

In the conventional hydraulic jack device 61, the upper and lower clamp cylinders 69 and 71 are arranged outside the reaction force receiving beam 62. As a result, a space is required on the side of the reaction force receiving beam 62 so that both clamping cylinders 69, 71 can move up and down, and depending on the shape of the lifted body 60, the standing position of the reaction force receiving beam 62 is restricted. There is a problem that the clamp cylinders 69 and 71 are easily damaged during the work.

Further, in the conventional hydraulic jack device 61, as a method of synchronously operating a plurality of hydraulic jack devices 61, the oil supply to the hydraulic jack 63 which is rapidly extended is shut off by a solenoid valve or the like. A so-called on-off control system in which the extension operation of the jack rod 66 is temporarily stopped and the solenoid valve is opened again when the jack rod 66 of the hydraulic jack 63 whose extension operation is delayed extends by the same dimension. The tuning operation method of is adopted. As a result, the jacking becomes extremely unsmooth, and the jacking speed itself becomes slow, so that the work efficiency cannot be improved.

The present invention is intended to solve the above-mentioned problems in the conventional hydraulic jack device and its synchronizing operation method, in which the upper and lower clamp cylinders are integrated with the hydraulic cylinder. The hydraulic jack system and its tuning are arranged so as to be located inside both side walls of the receiving beam and to continuously control the amount of oil fed to the hydraulic cylinder to synchronize the operation between a plurality of hydraulic jack systems. It provides a method of operation.

[0007]

According to the invention described in claim 1, the clamp pin locking holes D are formed on both side walls at a constant pitch L.
In a hydraulic jack device A that moves up and down along a reaction force receiving beam C that is formed by facing each other, the hydraulic jack device A is a hydraulic jack 1; a cylinder body 4 of the hydraulic jack.
An upper clamp cylinder 2 fixed to one end of the cylinder in a direction perpendicular to the axis thereof; and a lower clamp cylinder 3 fixed to a tip of a piston rod 5 of the hydraulic jack in a direction perpendicular to the axis thereof. It is what

Further, in the invention according to claim 3 of the present application, the reaction force receiving beam C in which the clamp pin engaging holes D are formed in opposite directions at the constant pitch L on both side walls is provided to the cylinder body 4 of the hydraulic cylinder 1. The upper cylinder 2 fixed to the upper end of the and the lower clamp cylinder 3 fixed to the tip of the piston rod 5 are clamped alternately to the upper and lower clamp pin locking holes D to make a scale insect type. A hydraulic jacking device A is provided which moves up and down, and an object B to be lifted and supported by the plurality of hydraulic jacking devices A is moved up and down by the synchronized operation of each hydraulic jacking device A. A stroke sensor 46
The central control panel 45 compares and calculates the signal from the stroke control signal S and transmits the stroke control signal S to the hydraulic pump power panel 43.
By the stroke control signal S, the hydraulic oil flow rate of the variable displacement hydraulic pump 42 of the hydraulic jack apparatus A that moves quickly is decreased, and the hydraulic oil flow rate of the variable displacement hydraulic pump 42 of the hydraulic jack apparatus A that moves slowly is increased. The continuous control in each direction is the basic configuration of the invention.

[0009]

The lower clamp pins 18 and 19 are locked in the locking holes D of the reaction force receiving beam C so that the lifted and lowered body B is suspended and supported. Push up the main body 4 with no load. Next, the upper clamp cylinder 2 is operated to operate the upper clamp pin 18
After locking Nos. 19 and 19 into the locking hole D, the hydraulic jack 1
And re-raise it slightly to raise the lower clamp pins 18 and 19
Is pulled out from the inside of the locking hole D, the hydraulic jack 1 is driven to load, and the lifted body B is lifted by one stroke L. Then, the lower clamp pins 18 and 19 are engaged with the locking holes D
After inserting the inside, the hydraulic jack 1 is slightly reassembled and lowered to pull out the upper clamp pins 18 and 19 from the locking holes D, and return to the same state as the initial state. By the above series of operation operations, the lifted body B is lifted by one stroke L.

In the process of hoisting the object B to be lifted, a stroke signal is sent from the stroke sensor 46 of each hydraulic jack device A to the central control board 45, and to the hydraulic pump power board 43 of the hydraulic jack device A which rises quickly. To the hydraulic pump power board 43 of the hydraulic jack device A, which has a slower rising speed, and is supplied with the tuning control signal S in the direction of decreasing the discharge flow rate of the variable displacement hydraulic pump 42.
The tuning control signal S in the direction of increasing the discharge flow rate of 2 is transmitted. As a result, the plurality of hydraulic jack devices A for hoisting and supporting the lifted / lowered body B ascend while being continuously adjusted in their ascending speeds.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of a hydraulic jack device A according to the present invention, and FIG. 2 is a cross-sectional view of FIG. FIG. 3 is an enlarged cross-sectional view of the roller shown in FIG. 1, in which the left half shows a state in which a first clamp pin 18 of an upper clamp cylinder, which will be described later, is projected outward, and the right half shows a second clamp pin 19. Shows the state of being pulled inward.

The present hydraulic jack device A includes a hydraulic cylinder 1.
And an upper clamp cylinder 2 fixed to one end of the hydraulic cylinder body 4 in the direction perpendicular to the axis thereof, and a lower clamp cylinder 3 fixed to the tip of the piston rod 5 in the direction perpendicular to the axis thereof. Usually, the lifted body B is suspended and supported by the casing 12 of the lower clamp cylinder 3, and the lifted body B is moved in the lifting direction by pulling up the piston rod 5 of the hydraulic cylinder 1. 1 and 2, 4 is a cylinder body, 5
Is a piston rod, 6 is a piston, 7 is a piston packing, 8 is a rod cover, 9 is a rod clevis, 10 is a head cover, 11 is a head clevis, and the tip of the piston rod 5 and the rod clevis 9 and the head cover 1
0 and the head clevis 11 are screwed respectively.

As shown in FIG. 3, the upper clamp cylinder 2 has a hollow casing 12 which also serves as a head clevis 11, a partition wall 13 which divides the interior of the hollow casing 12 into two chambers, left and right, and the partition wall. A piston is inserted between a fixed piston rod 29 inserted into and fixed to the central portion of the hollow casing 12 in the axial direction with the wall 13 inserted, and slidably inserted to one side of the rod 29. The piston front chamber 14 and the piston rear chamber 15 are formed between the first cylinder tube 16 forming the front chamber 14 and the piston rear chamber 15 and the rod 29 slidably attached to the other side of the rod 29. The second cylinder tube 17 and the first cylinder tube 16 are inserted and fixed to the outside, and the side end of the casing 12 is caused by the outward operation of the first cylinder tube 16. The first clamp pin 18 having a cylindrical shape protruding outward from the second cylinder tube 17 is inserted and fixed to the second cylinder tube 17, and the second cylinder tube 17 is actuated in the outward direction from the other end surface of the casing 12. It is formed of a cylindrical second clamp pin 19 and the like protruding outward.

In FIG. 3, 20 is a first oil supply / discharge port, 2
1, 22 and 23 are oil passages communicating with the left and right piston front chambers 14, 14 and 24 and 25 are left and right piston rear chambers 15, 1.
5 is an oil passage communicating with the second oil supply port 2
6 (not shown). Further, 27 is a limit switch, 28 is a rod cover, 29 is a fixed piston rod, 30 is a head cover, 31 is a stopper, 32 is a cap, 33 is a grease passage, 34 is a piston packing, 35 is a rod packing, 36 is a dust seal, 37
Is an O-ring.

The lower clamp cylinder 3 has exactly the same structure as the upper clamp cylinder 2, except that the hanging casing 39 is integrally formed on the hollow casing 12. is there.

The upper clamp cylinder 2 and the lower clamp cylinder 3 supply hydraulic oil from the first oil supply / discharge oil port 20 and pressurize the insides of both piston front chambers 14, 14 through oil passages 21, 22, 23. Together with both piston rear chambers 15,
By discharging the hydraulic oil in 15 from the second oil supply / discharge port 26 through the oil passages 24, 25, both cylinder tubes 1
6, 17 are pulled back inward. As a result, both clamp pins 18 and 19 fixed to this are pulled inward of the casing 12. On the contrary, the hydraulic oil is supplied from the second oil supply / exhaust port 26 into the piston rear chambers 15, 15 through the oil passages 24, 25, and from the first oil supply / exhaust port 20 through the oil passages 23, 22, 21. By discharging the hydraulic oil in the piston front chambers 14 and 14, the clamp pins 18 and 19 are projected to the outside of the casing 12, respectively.

FIG. 4 is an explanatory view of the operation when the lifted body B is lifted by using the hydraulic jack device A according to the present invention. In FIG. 4, B is an object to be lifted (lifting stage), C
Is a reaction force receiving beam, and D is a clamp pin locking hole formed in both side walls of the reaction force receiving beam at a constant pitch L (L = 500 mm). First, the hydraulic jack 1 is operated to push up the cylinder body 4 with no load (a in FIG. 4), and then the upper clamp cylinder 2 is operated to operate the clamp pins 18, 1.
9 is inserted into the clamp pin locking hole D ₄ (b in FIG. 4). Next, the hydraulic jack 1 is slightly actuated in the hoisting direction to bring it into a so-called remountable state (c in FIG. 4), and then the lower clamp cylinder 3 is actuated to draw the clamp pins 18 and 19 inward. (FIG. 4d). Furthermore,
The hydraulic jack 1 is operated to lift the lifted body B for one stroke (e in FIG. 4), and the lower clamp pin 18,
Insert 19 into the clamp pin locking hole D (f in FIG. 4). Next, the hydraulic jack 1 is operated to operate the cylinder body 4
To a state where refilling is possible (refilling down) (g in FIG. 4), and then the upper clamp pins 18, 19
Is pulled inward and the lifted body B is raised by one stroke (h in FIG. 4). The pressure switch 48 in FIG. 4 is operated by the pressure of the hydraulic oil of the hydraulic jack 1 and transmits an on-off signal in the state as shown.

When actually lifting the object B to be lifted, a plurality of hydraulic jacks A are operated synchronously to lift the object B to be lifted while maintaining a constant posture. 5 is 4
It is an example of a device arrangement in the case of lifting the lifted object B using the base hydraulic jack device A. In addition, FIG.
6 is a block diagram showing the overall configuration of the apparatus in the hoisting method of FIG. 5, in which 39 is hydraulic system piping, 40 is
Is an instrumentation system wiring, and 41 is a tuning control system wiring.

Referring to FIG. 6, each hydraulic jack device A is provided with a hydraulic drive unit 44 comprising a variable displacement pump 42 and a hydraulic pump power board 43, and four hydraulic pump power boards. Reference numeral 43 is controlled by an operation signal P from a central control board 45 and a stroke tuning control signal S, respectively. That is, by inputting the stroke tuning control signal S from the central control board 45 to the pump power board 43, so-called tilt angle control of the variable displacement pump is performed by hydraulic pilot control or electromagnetic proportional control, and the variable displacement pump is controlled. The flow rate of 42 is adjusted. As a result, the lifting speed of the hydraulic jack 1 of the hydraulic jack device A having a fast operation is delayed, and conversely, the lifting speed of the hydraulic jack 1 having a delayed operation is increased, so that the plurality of hydraulic jacks 1 are connected to each other. The tuning of the operation of is continuously maintained.

Further, each hydraulic jack device A has a stroke sensor 46 and pressure switches 47, 48 as instrumentation equipment.
And each clamp pin 1 of both clamp cylinders 2 and 3
8 and 19 position detecting limit switches 27 are provided respectively, and a central control panel 45 is provided through an instrumentation system pipe 40.
Signals are input to the respective. The stroke sensor 4
Reference numeral 6 is for continuously detecting a change in stroke of the hydraulic jack 1. The stroke of each hydraulic jack 1 detected by the sensor 46 is continuously controlled by the central control board 45.
Is input to. The input detection value from each stroke sensor 46 is compared and calculated by the central control board 45, and the tuning control signal S is output to each hydraulic pump power board 43.
Further, the pressure switch 47 is common to both of the clamp cylinders 2 and 3 as shown in FIG. 7, and transmits a position control signal for the clamp cylinders 2 and 3.

FIG. 7 is a hydraulic drive system diagram of the hydraulic jack device A. The portion surrounded by the alternate long and short dash line is the hydraulic drive unit 4.
This is a part belonging to 4. The hydraulic fluid sent from the variable displacement hydraulic pump 42 is sent to the hydraulic jack 1 via the solenoid valve 59 and the solenoid valve 49, and is held by the load hold dig valve 50. Further, hydraulic oil is supplied from the solenoid valve 49 to the two clamping cylinders 2 and 3 via the solenoid valves 51a and 51b and the double pilot check valves 52 and 53. The variable displacement hydraulic pump 42 is provided with a tilt angle control mechanism 54 for so-called flow rate control. In this embodiment, the servo pump 5 is used.
5, continuous flow control of hydraulic oil is performed via the tilt angle control mechanism 54 by a so-called hydraulic pilot control system including the flow control valve 56, solenoid valves 57, 58, and the like. In the present embodiment, the flow rate control of the variable displacement hydraulic pump 42 is performed by the hydraulic pilot control method as shown in FIG. 7, but the flow rate control can also be performed via the tilt angle control mechanism 54 by the electromagnetic proportional control method. Is.

[0022]

According to the hydraulic jack device A of the present invention, the hydraulic jack 1 and the upper and lower clamp cylinders 2 and 3 are provided.
Since they are arranged on the axis and integrated with each other, the clamping cylinder does not project outward from the reaction force receiving beam C unlike the conventional hydraulic jack device of this type, and the reaction force receiving beam C Can be compactly stored in both side walls. As a result, there is less restriction on the selection of the installation location of the reaction force receiving beam C, and the risk of damage to the clamping cylinder is lessened. Further, in the hydraulic jack device A of the present invention, the upper and lower clamp cylinders 2,
3, a fixed piston rod 29 and cylinder tubes 16 and 17 in which both ends thereof are attached,
It is formed from clamp pins 18, 19 and the like that are inserted and fixed to the outside of 17, and the operating mechanism of the pins 18, 19 is built in the clamp pins 18, 19 themselves. As a result, the upper and lower clamp cylinders 2 and 3 can be downsized, and the pins can be pushed out and pulled in smoothly.
Further, in the method invention of the present case, each hydraulic jack device A
The central control board compares and calculates the signal from the stroke sensor provided in the central control board, and sends the stroke tuning signal from the central control board to the hydraulic pump power board 43 of each hydraulic jack device A to control the flow rate of each variable displacement hydraulic pump. Thus, the tuning of the operation of the plurality of hydraulic jack devices A is continuously controlled. As a result, compared with the conventional so-called on-off control method of synchronous control, the lifted / lowered body B can be smoothly and quickly moved up and down, and not only the work efficiency but also the work safety is remarkably increased. improves. As described above, the present invention has excellent practical utility.

[0023]

[Brief description of drawings]

FIG. 1 is a plan view of a hydraulic jack device A according to the present invention.

FIG. 2 is a sectional view taken along the line E-I of FIG.

FIG. 3 is an enlarged cross-sectional view of the roller shown in FIG.

FIG. 4 is an explanatory diagram of an operating state of the hydraulic jack device A.

FIG. 5 is a perspective view of an object to be lifted B using four hydraulic jack devices A.
It is a top view which shows an example of an apparatus arrangement at the time of hoisting.

FIG. 6 is a block diagram showing an overall configuration of an apparatus in the hoisting method of FIG.

7 is a hydraulic drive system diagram of the hydraulic jack device A. FIG.

FIG. 8 is an explanatory diagram showing an example of a conventional method of raising and lowering a lifted / lowered body having a relatively large projected area.

FIG. 9 is a front view of a conventional hydraulic jack device.

FIG. 10 is a cross-sectional view taken along line E-I of FIG.

[Explanation of symbols]

A hydraulic jack device 15 piston rear chamber B lifted body 16 first
Cylinder tube C Reaction force receiving beam 17 2nd
Cylinder tube D Clamp pin locking hole 18 1st
Clamp pin L Pitch of clamp pin locking hole 19 Second
Clamp pin P Operation signal 20 1st
Oil supply / drainage port S Stroke synchronization control signal 21 Oil supply path 1 Hydraulic jack 22 Oil supply path 2 Upper clamp cylinder 23 Oil supply path 3 Lower clamp cylinder 24 Oil supply path 4 Cylinder body 25 Oil supply path 5 Piston rod 26 No. Two
Oil supply / discharge port 6 Piston 27 Limit switch 7 Piston packing 28 Rod cover 8 Rod cover 29 Fixed piston rod 9 Rod clevis 30 Head cover 10 Head cover 31 Stopper 11 Head clevis 28 Rod cover 32 Cap 12 Casing 33 Grease nipple 13 Partition wall 34 Piston packing 14 Piston front chamber 35 Rod packing 36 Dust seal 48 Pressure switch 37 O-ring 49 Solenoid valve 38 Hanging metal fitting 50 Solenoid valve 39 Hydraulic system piping 51 Solenoid valve 40 Instrumentation system wiring 52 Double pilot check valve 41 Tuning control wiring 53 Double pilot Check valve 42 Variable displacement hydraulic pump 54 Tilt angle control mechanism 43 Hydraulic pump power board 55 Motor pump 44 hydraulic drive unit 56 the flow control valve 45 central control panel 57 solenoid valve 46 stroke sensor 58 Solenoid valve 47 pressure switch 59 Solenoid valve

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Shuzo Tsuchiya 2-16-3, Toyosu, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries Co., Ltd.Toyosu General Office (72) Inventor Kimihisa Takada 3-chome, Toyosu, Koto-ku, Tokyo Ichiban No. 15 Ishikawa Shima Harima Heavy Industries Co., Ltd. Toji Technical Center

Claims (4)

[Claims] 1. A hydraulic jack device A which moves up and down along a reaction force receiving beam C in which clamp pin locking holes D are formed in opposite directions on both side walls at a constant pitch L. The hydraulic jack device A comprises: A hydraulic jack 1; an upper ramp cylinder 2 fixed to one end of a cylinder body 4 of the hydraulic jack in a direction perpendicular to its axis; a piston rod 5 of the hydraulic jack
2. A hydraulic jack device, comprising a lower clamp cylinder 3 fixed to the tip of the cylinder in a direction perpendicular to the axis thereof. 2. The upper clamp cylinder 2 and the lower clamp cylinder 3 are a hollow casing 12, a partition wall 13 that divides the interior of the hollow casing 12 into two chambers, and a partition wall 13 is inserted into the casing 12. A fixed piston rod 29 inserted into the first cylinder tube 16 and a second cylinder tube 17 that are slidably inserted into both ends of the fixed piston rod 29 and form a piston front chamber 14 and a piston rear chamber 15. The cylinder tubes 16,
17 is attached and fixed to the outside of each cylinder tube 16,
The hydraulic jack device according to claim 1, wherein the hydraulic jack device is formed of a first clamp pin 18 and a second clamp pin 19 that project outward from a side end surface of the hollow casing 12 by an outward operation of the hollow casing 12. 3. An upper cylinder 2 and a piston fixed to the upper end of a cylinder body 4 of a hydraulic cylinder 1 on a reaction force receiving beam C having clamp pin locking holes D formed in opposite directions on both side walls at a constant pitch L. A hydraulic jack device A that moves up and down in a worm-like manner is disposed by alternately locking the clamp pins 18 and 19 of the lower clamp cylinder 3 fixed to the tip of the rod 5 in the upper and lower clamp pin locking holes D. Then, in the method of moving up and down the lifted body B suspended and supported by the plurality of hydraulic jack devices A by the synchronized operation of each hydraulic jack device A, each hydraulic jack device A
The central control board 45 compares and calculates the signal from the stroke sensor 46 of the above, and transmits the stroke control signal S to the hydraulic pump power board 43, and the stroke control signal S causes the variable displacement hydraulic pressure of the hydraulic jack device A to move up and down quickly. Continuously controlling the hydraulic oil flow rate of the pump 42 in a decreasing direction and continuously controlling the hydraulic oil flow rate of the variable displacement hydraulic pump 42 of the hydraulic jack apparatus A which moves slowly up and down, respectively. .. 4. The tuning operation method of the hydraulic jack device according to claim 3, wherein the tilt angle control is performed by a hydraulic pilot control method or an electromagnetic proportional control method to control the flow rate of the hydraulic oil of the variable displacement hydraulic pump 42.