JPH0622650Y2 - Triple air film carrier - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention horizontally transfers a large concrete caisson or other super heavy object (hereinafter referred to as a caisson), which is used, for example, as an outer facility of an open sea port structure on the ground. The present invention relates to an air film type conveying device useful for the above, and more particularly to a triple type air film type conveying device in which three fluid cushion units each having an air film forming function are connected.

(Prior Art) Conventionally, as a method of transferring a heavy object on the ground, a method of supporting a heavy object by a plurality of self-propelled or driven carriages and causing it to travel on a traveling rail of a conveyance path, and an air levitation carriage A heavy object is supported and the dolly is slightly floated over the transport path, or an air film is formed between the dolly and the air while it is pushed out from the rear by a reaction-type propulsion device using a hydraulic jack or a hydraulic cylinder. There is a method.

In the case of this kind of bulky heavy goods, because it is manufactured and assembled locally near the launching place, it has to go through the horizontal path and the vertical path to carry from the production place on the platform to the launching position. Often. The change of direction from the traverse to the longitudinal is particularly difficult when a plurality of carriages are arranged in the conveying direction and conveyed by the plurality of carriages. FIG. 8 shows a case in which a plurality of sets of bogies are relocated at the intersection of a horizontal road and a vertical road to change directions. To briefly explain this, first, (a) the caisson 2 from the A point on the bogie 1 Transport to point B, (b)
At the point B, the hydraulic jack of the trolley 1 is lowered and the caisson 2 is mounted on the mount 3. (C) After being struck by the gantry 3, lower the jack of the trolley 1 and retract it to the front, and move it to the right in the figure by hanging it with a crane or the like. (D) The dolly 1 after the relocation is carried directly under the caisson 2 and jacked up again, and (e) the dolly 1 is moved to the launch point C.

Separately from this, a method of separately providing a carriage for traverse and a carriage for traverse on each transport path is also used. This system will be explained with reference to FIG. 9. First, (a) the caisson 2 is transported by the carriage 1 to the point B, and (b) when it reaches the point B, the hydraulic jack of the carriage 1 is jacked up for vertical travel. Bring in the trolley 4, (C)
With the caisson jack up, insert the bogie 4 directly below the caisson, (d) jack up the hydraulic jack of the bogie 4 to support the caisson 2, and then (e) lower the jack of the bogie 1 to replace the bogie 1 with the original one. The caisson 2 is moved from the point B to the point C by moving the caisson 2 backwards toward the point A and lowering the jack of the carriage 4.

(Problems to be solved by the invention) All of the above-described conventional direction changing methods require heavy work and time for remounting and positioning heavy objects, and require a large space at intersections. And

Even when carrying a trolley that can move in any direction, for example, using multiple air levitation trolleys, if you try to change direction without rearranging the trolleys, the direction may change depending on the number of trolleys lined up in the transport direction. The number of slideways after conversion will have to be increased. For example, as shown in FIG. 10, there are three slideways a, b, c on the traverse road.
If nine carriages 4 are arranged side by side on each line, the number of slideways in the longitudinal path must be increased from three lines to nine lines by changing direction, which requires extra space and equipment costs. Will be done. Further, when there is a step or a gap 45 (see FIG. 9) in the slideway, there is a problem that a single air levitation bogie cannot pass through the step or the gap.

(Means for Solving the Problems) A triple type air film type conveying device according to the present invention comprises a vertical expansion / contraction mechanism, and takes compressed air into a lower pressure chamber to convey a passage from pores on the lower surface of the lower pressure chamber. At least three fluid cushion units that jet out to the transport path to form an air film are linearly arranged, and a revolving frame stretched so as to connect the body portions of the fluid cushion units to each other. The fluid cushion unit is pivotally attached to the body of the central fluid cushion unit, and is loosely inserted into the body of the fluid cushion unit other than the center. The upper and lower stopper frames are provided.

(Embodiment) Next, an embodiment of the present invention will be described with reference to the drawings.

First, as the fluid cushion unit applied to the present invention, for example, a fluid cushion support device as disclosed in JP-A-58-183523 is preferably used.
This device will be briefly described with reference to FIG. 7.
An expansion and contraction operation unit such as a hydraulic jack surrounded by a heavy object carrying body portion 12 is provided on an annular support frame 11 so that the caisson heavy object 10 to be transported can be placed on the body portion 12. Has become. The support frame 11 can be vertically expanded and contracted with respect to the body 12 by the expansion and contraction operation part. An annular cylinder portion 13 which is concentric with the center of the frame is formed on the outer peripheral portion of the support frame 11, and an annular piston picking member 14 is inserted into the cylinder portion 13 from the lower side of the cylinder. The bottom of the piston packing member 14 is connected by a bottom plate 15. A space between the annular cylinder portion 13 of the support frame 11 and the piston packing member 14 serves as a primary pressure chamber 16, and a space between the lower surface of the support frame 11 and the bottom plate 15 serves as a secondary pressure chamber 17. As shown, the primary pressure chambers 16 and 2
An air pressure supply unit 18 is connected to the next pressure chamber 17 via a detachable pipe, and a plurality of pores 20 are formed in the bottom plate 15. The primary and secondary pressure chamber 1
The pressure introducing ports 6 and 17 are connected to each other via a pressure adjusting device 19. The pressurized air introduced into the secondary pressure chamber 17 is ejected from the pores 20 of the bottom plate 15 toward the road surface of the transport path 21, and thereby the space between the lower surface of the piston packing member 14 and the road surface of the transport path 21. An air film is formed. Reference numeral 21 is a piping hose connected to a hydraulic power source (not shown), and supplies pressure oil for vertically moving the cylinder of the expansion / contraction operation portion in the body portion 12.

The present invention is constructed by using the above-mentioned fluid cushion unit with some modifications. As shown in FIG. 1, three fluid cushion units 35, 36, 37 constructed according to the present invention are arranged in a straight line, and the body portions 35a, 36a, 37a of the respective fluid cushion units 35, 36, 37 are They are connected by a swivel frame 40. Body portion 36 of the central fluid cushion unit 36
a through the thrust bearings 38, 39 to the revolving frame 40
Are rotatably supported about the central unit. The body parts 35a and 37a of the fluid cushion units 35 and 37 are respectively provided at both ends of the revolving frame 40.
Is inserted. A pair of brim-shaped stopper frames 41 and 42 are fixed to the body portions of the fluid cushion units 35 and 37 on both sides so that the swivel frame 40 is sandwiched from above and below. A gap S is formed between the upper and lower stopper frames 41, 42 and the turning frame 40. Fluid cushion units 35, 3 on both sides with the caisson 10 removed
In a state in which a gap is formed between the upper surfaces of the body portions 35a, 37a of 7 and the caisson 10, the revolving frame 40 is revolved around the central unit 36 manually or by using a drive mechanism described later, so that the units 35 on both sides are rotated. , 37 swivel around the central unit 36, but with three units 3
The linear arrangement state of 5, 36 and 37 does not change.

Such an air film type transfer device having a triple structure is usually arranged between the lower surface of the caisson and the slide way 55 so as to be along a plurality of sets of slideways 55, but in each case, three fluid cushion units are transferred. Are lined up in one direction,
As described with reference to FIG. 7, compressed air is ejected from the pores of the unit bottom plate to form an air film between the compressed air and the slide way. Press the back of the caisson to carry out continuous transfer or intermittent motion transfer.

When the direction is changed at the intersection of the traverse path 22 and the longitudinal path 23, as shown in FIGS. 2 and 3, with the central fluid cushion unit 36 located at the center of the intersection 43, the fluid cushion units 35 on both sides are disposed. By operating the built-in jack of 37, the entire unit is contracted up and down, and a gap is created between the slideway facing surface (piston packing member 14, bottom plate 15, see FIG. 7) of the unit and the slideway. Due to the lowering of the unit's own weight due to the occurrence of a gap,
In cooperation with the upper stopper frame 41 (FIG. 1) and the swivel frame 40, the caisson lower surface and the unit 35,
A gap is also formed between the caisson mounting surface (upper surface of the body) of 37, and in the end, when the upper stopper frame 41 of the unit body and the revolving frame 40 are in contact with each other, the gaps T and t (first (See FIG. 2). After this, the swivel frame 40 is swiveled around the central unit 36, and the three units 35, 36, 37 are aligned in the direction of the slideway to be turned, and the units 3 on both sides are swung.
Return 5, 37 to the original vertical extension position (state of Fig. 1),
The propulsion device is rearranged to restart the transportation. Depending on the weight of the caisson 10, the caisson may be supported by another temporary fixing member at the time of changing the direction so that an excessive load is not applied to the central fluid cushion unit 36 until the transport is resumed.

If there is a step or gap in the middle of the transport path, see Fig. 4 (a)-
While continuing the transportation in the order of (e), it passes through the step and the gap. In FIG. 4 (a), the caisson is stopped when the fluid cushion unit 35 at the front end in the traveling direction comes to the clearance place 45. Next, as shown in FIG. 7B, a gap is created on the upper and lower surfaces of the tip unit 35 by jacking, and the caisson is moved in the carrying direction in this state to pass the tip unit 35 (FIG. 7C). . After passing through the tip unit 35,
As shown in FIG. 4 (d), the unit 35 is lowered onto the slide way, this time the central unit 36 is jacked up, and the lower frame 42 supports the swivel frame 40 as described in FIG. And the unit 36
From the slideway and move forward as above. After the central unit 36 has passed through the gap 45,
Similarly, the rear unit 37 is also jacked to move the caisson. Depending on the form of the propulsion device, this series of operations can be a continuous transfer operation without stopping the caisson 10.

The revolving frame 40 may be revolved manually, but it may be revolved automatically by a revolving drive mechanism described later.
5 and 6 are a plan sectional view and a side view of the turning drive mechanism. A motor 47 with a speed reducer having a pinion gear 46 is attached to the body portion 36a of the central fluid cushion unit 36, and an arcuate rack gear 48 concentric with the turning center of the frame is fixed to the turning frame 40. The pinion gear 46 and the rack gear 48 mesh with each other. In the illustrated embodiment, the arcuate rack gear 48 is formed to have an arc range of approximately 90 °. Corresponding to the arc-shaped rack gear 48, a protrusion 49 is fixed to the lower surface of the revolving frame 40 at a position opposite to the arc rack gear 48, and a pair of 90 ° is provided on the body portion of the central unit 36 or the fixed portion of the thrust bearing outer ring. Stoppers 50 and 51, which are circumferentially separated at a central angle, are fixed. The revolving frame 40 is rotated by the motor 47, and the protrusion 49 of the frame 40 is rotated.
The motor 47 abutting against the stopper 50 or 51 is stopped, and in this state, the turning position of the turning frame 40 within the range of 90 ° is determined. The above-mentioned turning drive mechanism is not limited to the embodiment, and may use another drive method such as a hydraulic cylinder.

(Effects of the Invention) As described above, according to the present invention, when an ultra-heavy object such as a caisson is transferred, the direction change during the transfer can be easily and quickly performed even in a narrow space at an intersection. Further, there is no need to remove the plurality of fluid cushion units themselves supporting the caisson and replace them at another location, and it is only necessary to change the direction, so the work is easy and the safety is high. Facility costs can be reduced because there is no need to increase the number of slideways on the direction change side. In addition, even if there is a step or a gap in the slideway, it can be passed or transported. Even when passing through obstacles such as steps and recesses in the slideway, there are many effects such as continuous conveyance without pausing.

[Brief description of drawings]

FIG. 1 is a side view of a triple type air film type conveying apparatus according to an embodiment of the present invention, FIG. 2 is a side view of the embodiment of the present invention showing an operation state at the time of turning, and FIG. 3 is an intersection. 4 (a) to 4 (e) are side views showing the states when passing through the gap portion of the slideway in the order of operation, FIG. 5 and FIG. FIG. 7 is a plan sectional view and a side view of a drive mechanism of a revolving frame according to an embodiment of the present invention, FIG. 7 is a schematic side sectional view of a fluid cushion unit applied to the present invention, FIG. 8 and FIG. Is a plan view and a side view for explaining a conventional transport direction changing system, and FIG. 10 is a plan view for explaining a state in which the number of threads of a slide way is increased by the conventional direction changing. 2, 10 ... Caisson, 22 ... Horizontal path, 24 ... Longitudinal path, 35, 37 ... Fluid cushion units on both sides, 36 ... Central fluid cushion unit, 38, 39 ... Thrust bearing, 40 ... Swivel frame, 41, 42 ... Stopper frame, 46 ... Pinion gear, 47 ... Motor, 48 ... Rack gear, 49 ... Projection part, 50, 51 ... Stopper.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-49-3372 (JP, A) JP-A-53-85043 (JP, A) Actual development Sho-55-107471 (JP, U) JP-B-52- 49636 (JP, B2)

Claims (1)

[Scope of utility model registration request] 1. A fluid cushion having an up-and-down expansion mechanism, wherein compressed air is taken into a lower pressure chamber and is ejected from pores on the lower surface of the lower pressure chamber to a transfer path to form an air film between the compressed air and the transfer path. At least three units are arranged in a straight line, and a revolving frame stretched so as to connect the body parts of the respective fluid cushion units is pivotally attached to the body part of the central fluid cushion unit so as to be pivotable, and Other than the center of the fluid cushion unit is loosely inserted, and in the body portion of the fluid cushion unit other than the center, stopper frames are provided above and below the swivel frame with a predetermined gap therebetween. Transport device.