JP3204283B2 - Large space structure construction equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for constructing a large space structure such as a large roof, which is assembled at a low position and then installed at a predetermined height. .

[0002]

2. Description of the Related Art A large space structure constructing apparatus in which a large space structure such as a large roof is assembled at a low position and then installed at a predetermined height is disclosed by the present applicant in Japanese Patent Application No. Hei. No. 3-42810.

In this technique, a gantry is constructed so as to straddle an assembled large space structure, a jack device is mounted on the gantry, and a lifting rod of the jack device is hung down below the gantry. In the vicinity of the lower end of the rod, a column attached to the large space structure is connected, and the column is lifted by the jack device, whereby the large space structure is lifted to a predetermined height and installed. is there.

In this construction apparatus, since a large space structure to be lifted has a large weight, a plurality of (for example, four) jack devices used for the lifting operation are provided to reduce the load on one jack device. are doing.

[0005]

In the construction apparatus for a large space structure according to the above proposal,
The following problems remain to be improved.

That is, although a plurality of jack devices are used to move a column, for some reason, when a load acting on a lifting rod acts in a direction inclined with respect to the axis of the lifting rod, The load acts on the jack device that supports the load from an inclined direction.

When such a load is applied to the jack device, not only is it impossible to effectively support the load by the jack device, but also bending stress is generated in the lifting rod, which hinders its smooth operation. In addition, since the load applied to each jack device becomes non-uniform, the operating condition between each jack device is also different, and as a result, the moving direction of the lifting rod is deviated from its axis, which promotes the above-described problem. There is a possibility that it will.

The present invention has been made in view of the above-mentioned conventional problems, and is intended to be applied even when a load is applied to a column connected to a large space structure to be constructed from a direction inclined with respect to its axis. It is another object of the present invention to provide an apparatus for constructing a large space structure in which the load is supported along the axial direction of the jack device.

[0009]

In order to achieve the above-mentioned object, a construction apparatus for a large space structure according to the present invention uses a large space structure assembled at a low position in this large space structure. What is claimed is: 1. A construction apparatus in which an attached support is moved upward to be installed at a predetermined height, comprising: a gantry installed at a construction site; and a plurality of jack apparatuses vertically suspended from an upper part of the gantry. And a plurality of beams that are slidably connected to the jack device in a state in which the jack device and the support are engaged with each other and are bridged between the jack devices, and an uneven load between the jack devices. And a eccentric load adjusting mechanism for suppressing the eccentric load based on a detection signal from the load detecting means. Each of the jack devices is swingably attached to the gantry. And the support is swingably connected to the beam so that the jack device swings with respect to the gantry together with the support when the support is swung relative to the gantry. The offset load adjusting mechanism includes a hydraulic cylinder interposed between the jack device and the beam, and when the support is swung with respect to a gantry, the hydraulic cylinder controls the beam. Is rotated to adjust the posture of the beam so as to be orthogonal to the axis of the column.

[0010]

In the construction apparatus for a large space structure according to the present invention, when a load is applied to a support in a direction inclined with respect to the axial direction, each jack device is swung with respect to a gantry and a support. It is along the direction in which the load acts.

Thus, the operation direction of each jack device is made to coincide with the direction of action of the load, so that the smooth operation of these jack devices is ensured.

If the load acting between the jack devices is not uniform, the load is detected by load detecting means provided in the jack device, and the load adjusting mechanism is operated in accordance with the detection result. By doing so, the vertical relative position between the jack device and the column is adjusted, and the load acting on each jack device is made uniform. In addition, when the column is swung with respect to the gantry, the load adjustment mechanism is activated, and the beam is adjusted so that the beam is perpendicular to the axis of the column. The load applied to the column can be transmitted to the device almost uniformly.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. First, the structure of a large space structure to which this embodiment is applied will be described. As shown in FIG. 1, a large space structure to which the present embodiment is applied is a large roof 1 having a spherical shell shape. A central roof truss 2 and a large number of large roof trusses 3 radially arranged around the central roof truss 2
And a pedestal 4 disposed at an outer peripheral end of each of the large roof trusses 3. Each of the large roof trusses 3 has a shape curved upward when viewed from the horizontal direction. .

The central roof truss 2 and each large roof truss 3 and the large roof truss 3 and the column pedestal 4 are hinged to each other. The lower end is hingedly connected to the upper part of the base 5 formed in an annular shape.

Below the joint between the central roof truss 2 and the large roof truss 3, a plurality of construction devices 7 having jack devices 6 for pushing up the large roof 1 are arranged at intervals in the circumferential direction. ing.

As shown in FIG. 5, the construction device 7 includes a lower beam 8 assembled on a rectangle installed on the ground, and columns 9 erected at four corners of the lower beam 8, respectively. The upper beam 10 is mounted on each of the supports 9 and the jack device 6 is mounted on the upper beam 10 via a receiving beam 11. A gantry 12 is constituted by the upper beam 10 and the gantry 12.

As shown in FIG. 7, the jack device 6 is composed of four hydraulic cylinders 13 arranged in a rectangular shape in plan view, and a lifting rod 14 inserted through the hydraulic cylinders 13. As shown in FIGS. 5 and 6, these hydraulic cylinders 13 are formed as a set of two, and between the lower ends of the lifting rods 14 of each set, a pair of first counters mounted via a hinge 15 is provided. A force receiving beam 16 is provided. As shown in FIG. 6, the first reaction force receiving beam 16 is vertically suspended substantially in parallel via a swivel joint 17 below a longitudinally intermediate portion thereof. A pair of second reaction force receiving beams 18 are provided, and between the two end portions of the second reaction force receiving members 18, they are placed so as to be bridged therebetween, and will be described later. Connects to support column 19 via hinge 20 A pair of third reaction force receiving beams 21 are provided, and the first to third reaction force receiving beams 16, 18, 21 and the hinge 15, the swivel joint 17, and the hinge 20 are provided. The jack device 6 is swingably connected to the column 19.

On the other hand, each of the hydraulic cylinders 13 is swingably supported by the receiving beam 11 via a spherical bearing 22 provided between the hydraulic cylinder 13 and the receiving beam 11. Therefore, the jack device 6 is configured such that the column 19 is
When it is swung with respect to 2, it can be swung with respect to the gantry 12 together with the column 19.

On the other hand, among the four jack devices 6, two jack devices 6 arranged diagonally detect the load acting on these jack devices 6, as shown in FIG. A load detector 23 is provided, and between the load detector 23 and the first reaction force receiving beam 16,
An unbalanced load adjusting mechanism 24 for equalizing the unbalanced load generated between the jack devices 6 is provided.

In the present embodiment, the load detector 23 uses a load cell. In the present embodiment, the offset load adjusting mechanism 24 uses a hydraulic cylinder. 25 is rotatably connected to the first reaction force receiving beam 16 via a hinge 15, and a piston 26 therein is connected to the lifting rod 14 via the vertical detector 23. I have. The load adjusting mechanism 24 adjusts the position of the hinge 15 in the axial direction with respect to the elevating rod 14, thereby rotating the first reaction force receiving beam 16, thereby forming the first reaction force receiving beam 16. The angles of the beam 16, the second reaction force receiving beam 18, and the third reaction force receiving beam 21 are adjusted so that all of the beams 16, 18, and 21 are orthogonal to the axis of the column 19. As a result, the unbalanced load between the jack devices 6 is reduced.

Each of the hydraulic cylinders 13 is arranged as shown in FIG.
As shown in the figure, the cylinder body 27 is slidably mounted in the cylinder body 27, is raised and lowered by hydraulic oil supplied into the cylinder body 27, and the lifting rod 14 is slidably inserted therethrough. And a pair of clamps 29 and 30 provided integrally below the ram 28 and the cylinder body 27 to fix and release the lifting rod 14 inserted through the ram 28. I have.

The hydraulic cylinder 13 is lifted by a clamp 29 provided on a ram 28.
In a state where the lifting rod 14 is fixed by the clamp 30 provided on the cylinder body 27 and the ram 28 is lifted, the lifting rod 14 is raised, so that the ram 28 After the lifting rod 14 is fixed by the clamps 29 and 30 at the time, the fixing of the lifting rod 14 by the clamp 29 provided on the ram 28 is released. In this state, the ram 28 is lowered to the lower limit. Then, after the lifting rod 14 is fixed by the clamp 29 provided on the ram 28, the fixing of the lifting rod 14 by the clamp 30 provided on the cylinder body 27 is released, and the ram 28 is raised. By repeating the operation of raising and lowering, the lifting rod 14 is raised intermittently. There.

Further, in this embodiment, as shown in FIGS. 10 and 11, the clamps 29 and 30 are provided with a lock sleeve 31 fitted in the elevating rod 14 in a tightly fitted state, In a state in which hydraulic oil is not supplied into the hydraulic chamber 32, the lock sleeve 31 moves the elevating rod 14 as shown in FIG. The hydraulic chamber 3 is tightened and fixed.
When hydraulic oil is supplied into the lock sleeve 3, the lock sleeve 3
The fixing of the lifting rod 14 is released by the expansion of 1 in the circumferential direction.

On the other hand, as shown in FIG. 7, the column 19 has a square cross section, and as shown in FIGS. A bracket 33 to which the hinge 20 attached to the reaction force receiving beam 21 is connected is provided integrally.

Next, an example of an operation for constructing the large roof 1 using the construction apparatus 7 having such a configuration will be described. First, a central roof truss 2 and a plurality of large roof trusses 3 are assembled at a low position near the ground, and one ends of these large roof trusses 3 are hinged to the central roof truss 2. Is also hinged to a column base 4 hinged to a foundation 5 to temporarily assemble the large roof 1 and to form a hinge joint between the central roof truss 2 and the large roof truss 3. A plurality of construction devices 7 are installed below. At this time, the foremost support 19 is attached to these construction devices 7, and the lower ends thereof are supported on the lower beams 8 of the construction devices 7.

Next, the lifting rod 14 of the jack device 6 is lowered to the lowest position, and the pair of third reaction force receiving beams 21 are connected to the respective brackets 33 of the support column 19 via the hinge 20. The jack device 6 is connected to the middle 19.

Thus, the operating oil is supplied to the clamp 29 provided on the cylinder body 27 to release the fixed state, and the clamp 3 provided on the ram 28 is released.
After the hydraulic oil has been drained from 0 to be in a fixed state, the ram 28 is raised to the uppermost limit, whereby the column 19 is raised together with the lifting rod 14 by the stroke of the ram 28.

After the clamps 29 and 30 are fixed, the clamps 29 provided on the ram 28 are fixed.
Then, the ram 28 is lowered to the lower limit. At this time, since the lifting rod 14 is fixed by the clamp 29 provided on the cylinder body 27, the lifting rod 14 and the column 19 engaged with the lifting rod 14 Is held.

The two clamps 29, 30
And the operation of the ram 28 is repeated to raise the lifting rod 14 to its upper limit. The stroke up to the ascending limit is set to a distance slightly longer than the length of the column 19.

Next, after another column 19 is arranged on the lower beam 8 of the construction device 7 so as to be coaxial with the column 19 pushed up as described above, the ram 28 is lowered, and The first support 19 is placed on the support 19, and the two are connected to each other by abutting each other. Further, the upper support 19 and the hinge 20 attached to the third reaction force receiving beam 21 are connected to each other. Break the connection. As a result, both supports 19
Is supported by the lower beam 8 of the construction device 7.

By lowering the ram 28 further, the hinge 20 of the third reaction receiving beam 21 is positioned on the lower surface of each bracket 33 of the lower support 19, and these are connected. By repeating the above operation, the lower column 19 is raised together with the first column 19.

When such an operation is continued, the tip of the foremost support column 19 is brought into contact with the hinge joint between the central roof truss 2 and the large roof truss 3 located above it. At the time when the state occurs, the hinge connection portion is connected to the tip of the column 19, and thereafter, the operation of pushing up the column 19 and the operation of adding the column 19 are repeated in the same manner, as shown in FIG. Then, the temporarily assembled large roof 1 is gradually pushed up.

At this time, the central roof truss 2 and each large roof truss 3, each large roof truss 3 and column pedestal 4, and these column pedestals 4 and the foundation 5 are hinged, respectively. At the hinge connection portion, they are relatively rotated, so that a smooth ascent is performed.

When the central roof truss 2 is pushed up to a predetermined height, the column bases 4 are in a vertical state, and the large roof truss 3 is in a state inclined at a predetermined angle.

Thus, the column bases 4 are connected to each other in the circumferential direction by a tension ring or the like, and other necessary parts such as between the large roof trusses 3 are fixed or connected to install the large roof 1. Then, after disconnecting the tip of the state-of-the-art column 19 and the large roof 1,
With the jack device 6, the column 19 is sequentially removed from the lower part and lowered in the reverse order to the above-described procedure, and all the columns 19 are removed to complete the construction work of the large roof 1. At this time, according to the jack device 6 used in the present embodiment, since it is possible to immediately shift to the lowering operation without further raising from the highest position, unnecessary stress is applied to the large roof 1. Will not occur.

At the time of such a construction work, a load in a direction inclined with respect to the axial direction may act on the pushed-up column 19 for some reason. When such a load is applied, the support column 19 is inclined in the direction in which the load is applied. However, the jack device 6 is supported by the spherical bearing 22 with respect to the gantry 12, and each jack device 6 The connecting structure extending from the reaction force receiving beams 16, 18, 21 to the column 19 is a hinge 15 and a hinge 20 having rotation axes orthogonal to each other, and parallel to the rotation axes of these hinges 15, 20. Swivel joint 1 having two rotation axes
7, each reaction receiving beam 16, 18,
Since the support 21 is rotatable on two orthogonal planes passing through the axis of the support 19, the support 21 is tilted following the tilting operation of the support 19 described above.

Accordingly, the support device 19 and the jack device 6 are held in a parallel state, so that the jack device 6 is maintained.
Is applied to the jack device 6 in the direction of the axis thereof. As a result, an unnecessary bending load is suppressed from acting on the lifting rod 14 of each jack device 6, and smooth operation is ensured. You.

The loads acting on these jack devices 6 become non-uniform due to the tilting operation of each jack device 6 described above. This uneven load is detected by the load detectors 23 arranged diagonally. In addition, by operating the eccentric load adjusting mechanism 24 based on the detection result, the respective reaction force receiving beams 16, 18, 21 are relatively rotated with respect to the column 19, and the respective column members are respectively rotated. The posture is adjusted so as to be orthogonal to the axis of 19, whereby the offset load is eliminated. Therefore, the direction of the pushing force applied to the support 19 by the construction device 7 is also along the axial direction of the support 19,
Also from this point, a smooth lifting operation can be obtained.

On the other hand, if the supply of hydraulic oil to the jack device 6 is stopped for some reason, the lock sleeves 31 of the clamps 29 and 30 of the jack device 6 immediately grip the lifting rod 14, and Since the movement of the support 14 is restricted, even when an abnormality occurs in the hydraulic oil supply system, the lowering of the support 19 is automatically prevented, and safety is ensured.

On the other hand, when the large roof 1 is constructed by the construction method described above, the large roof 1 is pushed up to a predetermined height by the struts 19 which are pushed up while being added by the construction device 7, and the strut of the jack device 6 at the time of pushing up. At the time of gripping with respect to the support 19, the load of the support 19 and the large roof 1 is supported on the ground via the support 19 and the lower beam 8 constituting the construction device 7, so that the support 19 is held. This eliminates the need for a locking mechanism, thereby simplifying the configuration of the construction device 7.

Since the construction device 7 and the columns 19 pushed up by the construction device 7 are disposed below the large roof 1 to be constructed, the interference between these components and the large roof 1 is eliminated. In addition, the limitation on the size of the jack device 6 that can be installed is relaxed. As a result, the range of selection of the capacity of the jack device 6 is widened, and the limitation on the size of the large roof 1 that can be pushed up is relaxed.

The shapes, dimensions, and the like of the constituent members shown in the above embodiment are merely examples, and can be variously changed based on the type and shape of the large space structure to which the present invention is applied.

[0043]

As described above, the apparatus for constructing a large space structure according to the present invention moves the large space structure assembled at a low position to the column attached to the large space structure upward. A construction apparatus that is moved and installed at a predetermined height, a gantry installed at a construction site, a plurality of jack devices vertically suspended from the top of the gantry, and these jack devices. A plurality of beams that are slidably connected to the jack device while being connected to the support so as to be able to engage and span between the jack devices, and load detection for detecting an offset load between the jack devices. Means, and an offset load adjusting mechanism for suppressing the offset load based on a detection signal from the load detecting means, wherein each of the jack devices is swingably attached to the gantry, and is attached to the beam. When the strut is swingably connected to the gantry, the jack device swings with the strut with respect to the gantry when the strut is swung with respect to the gantry. The load adjusting mechanism includes a hydraulic cylinder interposed between the jack device and the beam, and when the support is swung with respect to the gantry,
The beam is rotated by the hydraulic cylinder to adjust the posture of the beam so as to be orthogonal to the axis of the column. The following excellent effects are obtained.

Even when a load is applied to the column in a direction inclined with respect to the axial direction, each jack device is caused to swing with respect to the gantry and to be in a state parallel to the column. By matching the axis of the jack device with the axis of the jack device, unnecessary bending stress is prevented from acting on the jack device, whereby the smooth operation of each jack device can be ensured.

When an unbalanced load occurs between the jack devices, the load is detected by load detecting means provided in the jack device, and the jack is operated by operating the load adjusting mechanism according to the detection result. By keeping the device and the support in a parallel state, the load acting on each jack device can be made uniform. Thereby, by setting the direction of the driving force for movement given to the support to the axial direction of the support, a smooth movement operation can be secured, and from this point, the construction work is also smooth. be able to.
In addition, when the column is swung with respect to the gantry, the load adjustment mechanism is activated, and the beam is adjusted so that the beam is perpendicular to the axis of the column. The load applied to the column can be transmitted to the device almost uniformly.

[Brief description of the drawings]

FIG. 1 is a partially omitted plan view showing one structural example of a large space structure constructed by an embodiment of a construction apparatus of the present invention.

FIG. 2 is a schematic diagram showing a procedure for building a large space structure using an embodiment of the building apparatus of the present invention, and showing a state immediately before pushing up the large space structure.

FIG. 3 is a schematic diagram showing a procedure for constructing a large space structure using an embodiment of the construction apparatus of the present invention, and showing a state in which the large space structure is being pushed up.

FIG. 4 is a schematic diagram illustrating a procedure for constructing a large space structure using an embodiment of the construction apparatus of the present invention, and showing a state where the large space structure is pushed up to a predetermined height.

FIG. 5 is a front view showing an embodiment of the construction apparatus of the present invention.

FIG. 6 is a side view showing an embodiment of the construction apparatus of the present invention.

FIG. 7 is a plan view showing an embodiment of the construction apparatus of the present invention.

FIG. 8 is an enlarged longitudinal sectional view showing a load detector and an offset load adjusting mechanism attached to the jack device of the present invention.

FIG. 9 is a longitudinal sectional view showing one structural example of a clamp of a jack device used for carrying out the construction method of the present invention.

FIG. 10 is a longitudinal sectional view showing one structural example of a clamp of a jack device used for carrying out the construction method of the present invention.

FIG. 11 is a schematic view showing the operation of a jack device used in the construction method of the present invention.

[Description of Signs] 1 Large roof (large space structure) 6 Jack device 7 Construction device 13 Hydraulic cylinder 14 Lifting rod 15 Hinge 16 First reaction force receiving beam (beam) 17 Swivel joint 18 Second reaction force receiving beam (Beam) 19 Prop 20 Hinge 21 Third reaction receiving beam (Beam) 22 Spherical bearing 23 Load detector 24 Unbalanced load adjusting mechanism

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hitomasa Hirasawa 2-10-26 Fujimi, Chiyoda-ku, Tokyo Inside Maeda Construction Industry Co., Ltd. (72) Inventor Tatsuo Hatato 2-26, Fujimi 2-chome, Chiyoda-ku, Tokyo No. Maeda Construction Industry Co., Ltd. (72) Inventor Makoto Kurosaka 2-10-26 Fujimi, Chiyoda-ku, Tokyo Maeda Construction Industry Co., Ltd. (72) Noboru Nishigaki 2-11-1 Sugamo, Toshima-ku, Tokyo Miyaji Construction (56) References JP-A-56-117997 (JP, A) JP-B-51-15339 (JP, B1) (58) Fields investigated (Int. Cl. ⁷ , DB name) E04G 21 / 14-21/16 E04B 1/32

Claims (1)

(57) [Claims] 1. A construction apparatus for mounting a large space structure assembled at a low position at a predetermined height by moving a support attached to the large space structure upward, the construction site comprising: And a plurality of jack devices vertically suspended from the top of the gantry, and these jack devices and the support are connected so as to be able to engage with each other and bridged between the jack devices. A plurality of beams swingably connected to the jack device in a state, load detecting means for detecting an unbalanced load between the jack devices, and suppressing the unbalanced load based on a detection signal from the load detecting means. An offset load adjusting mechanism, wherein each of the jack devices is swingably attached to the gantry, and the support is swingably connected to the beam, so that the jack device is When the support is swung with respect to the gantry, the support is configured to swing with respect to the gantry together with the support, and the offset load adjustment mechanism includes a hydraulic pressure interposed between the jack device and the beam. When the column is swung with respect to the gantry, the hydraulic cylinder rotates and moves the beam to adjust the posture of the beam so as to be orthogonal to the axis of the column. Construction equipment for large space structures.