JP2000345517A - Connecting type movable form device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently and accurately execute concrete casting according to a design by putting the whole wheel of a traveling device on a rail even when there is a camber or the like for using a traveling frame in the casting of a PC concrete floor slab. SOLUTION: A traveling frame 9 of a movable form device 1 is partitioned, joint members 12 are inserted in partitions in a bendable manner, vertical expansion mechanisms 11 are arranged, and even when there is a camber in a rail 5, the whole wheel is loaded to the rail to make it possible to equally put the whole load on the rail. Accordingly, even when there is a camber in the rail the whole load is equally put on the rail, the casting of a PC concrete floor slab is executed according to the design, and work can be carried out with high reliability and efficiency at a low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The disclosed technology belongs to the technical field of the structure of a movable form device used when constructing a slab portion of a bridge having a prestressed concrete slab by cast-in-place concrete.

[0002]

2. Description of the Related Art As is well known, a remarkable improvement in the life of citizens is supported by the rise of various industries, and the various industries are scattered throughout the country without a corner.
In various industrial facilities, transportation systems for transporting goods, materials, persons, etc. have been laid nationwide on a network, and therefore, a road network required for transporting goods, materials, and human resources. And the railway network is nationwide.

[0003] However, as is well known, in Japan, where the land is narrow and there are many mountainous forests, and especially in Japan with special terrain that is approaching a complicated and long coastline, it is effectively used for construction. Available plains are limited,
Roads and railways are also laid out in a state of twists and turns nationwide, which makes it easy to build a momentum road network, but the road network makes it easy to build many bridges Is essential to

However, in the construction of such a bridge, the number of main girders to be arranged is reduced from the viewpoint of improving the efficiency of recent construction, shortening the construction period, or reducing the cost, and reducing the number of the central girder. There is a tendency for many so-called small-main girder types to be concentrated and ordered. Therefore, the construction technology of such small-main girder bridges has been studied for improvement and development from beginning to end, and is being used for construction work.

[0005] However, even with such a small main girder bridge, a precast concrete slab (hereinafter referred to as PC) is provided on the main girder.
It is inevitable to construct a concrete slab, and it is efficient to drive the PC concrete slab on the main girder whose height is increased only through the conventional unit formwork. Poor and unfavorable in terms of construction accuracy. Therefore, the traveling frame of the movable form device is moved via the traveling drive along the rail provided on the flange of the main girder via the bracket. Then, the concrete floor slabs are cast at predetermined spans.

The traveling frame of the conventional movable form device is provided with a plurality of traveling driving devices moving on rails installed on the PC concrete slab in the bridge axis direction at four corners of the traveling frame. In most cases, a gantry formed on the traveling drive device and having a dimension of the bridge shorter than that of the bridge at right angles was used.

[0007] The formwork is provided on the traveling frame so as to be located on the lower surface of the projecting portion of the floor slab by a scaffold attached downwardly from the traveling frame.

In such a movable form device, after the PC concrete is cast, the traveling frame travels on the rail, and the next P
The PC concrete floor slab portion of the bridge was sequentially constructed by repeatedly moving to the C concrete placement site.

[0009] However, in the above-described movable form device, since the size of the traveling frame is shorter than the size in the right angle direction, the distance for one PC concrete casting is short.
In addition, there was a drawback that the frequency of movement increased and construction efficiency was poor.

In order to cope with this problem, the efficiency of the construction is increased by increasing the formwork so as to lengthen the casting distance at one time and forming the traveling frame into a tunnel shape longer than the right angle direction. I was

However, since the tunnel-shaped traveling frame is long and the driving distance is long, the apparatus becomes large, and the load acting on the traveling frame is greatly increased. Also, measures have been taken to disperse the increasing load of the traveling frame, which is increased in size by providing a plurality of traveling driving devices.

[0012]

By the way, many bridges have a structure in which a camber is provided in a structurally and functionally so-called camber, so that the traveling frame becomes longer and the number of traveling means is reduced. Due to the increase, the problem that the load does not act evenly on all the traveling means has occurred.

In other words, since the running frame is rigid, there is a disadvantage that the running wheels cannot float on the rails because they cannot follow the camber.

[0014]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problem that the camber of the traveling frame cannot be completely followed according to the prior art. Therefore, it is an object of the present invention to provide an excellent bridge construction technology in the construction industry by coping with vertical unevenness such as a camber of a bridge body so that all running means receive loads as evenly as possible.

[0015]

SUMMARY OF THE INVENTION In accordance with the above-mentioned object, according to the present invention, the traveling frame is formed in a right-angled direction with a gate, and the form is suspended.
In a movable form device which is movable on a rail by a traveling drive device mounted on the traveling frame, the traveling frame device includes at least a pair of traveling drive devices in a direction perpendicular to the traveling frame, and a moving drive device and the traveling frame are disposed between the traveling driving device and the traveling frame. Equipped with a telescopic mechanism for adjusting the height of the traveling frame in the vertical direction, and equipped with a joint portion connected to the traveling frame as a base, and a pair of traveling driving devices in a direction perpendicular to the traveling frame. It has taken the technical measures that it had.

[0016]

In order to drive a running frame on a PC concrete slab while moving the running frame at a predetermined pitch in the driving direction, the running frame is provided with at least one pair of running drive devices in a direction perpendicular to the running frame.
By providing the drive device with a telescopic function for vertically moving the traveling frame, even if there is a camber on which the traveling frame can move, it has a joint portion connected to the traveling frame so that it can expand and contract vertically. By applying a substantially equal load to the bridge rail and main girder, the load on the composite girder can be reduced, deflection can be suppressed, and the length of the traveling frame can be set to a predetermined length. The provision of the two pairs of traveling driving devices enables efficient disassembly of details, maintenance and inspection equipment, and the like, efficient construction of the PC concrete slab as designed, and contributes to cost reduction.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The following is a description of embodiments of the present invention as embodiments of the present invention, with reference to the drawings.

In FIG. 1, a movable inner form device 2 provided below a connecting type movable form device 1 forming the gist of the invention of this application is a main girder 4 of a PC concrete slab 3 and the main girder. Although this is an apparatus for forming the portion between 4, the moving inner form device 2 is omitted in FIGS. 2 and 3 because it is not directly related to the gist of the invention of this application.

The movable form device 1 is mounted on a rail 5 laid on two steel main girders 4 and 4, and is provided with a side form 8 so that a PC concrete floor slab can be provided. The device forms a portion that protrudes outward from the main girder 4 of 3.

The movable form device 1 is provided with a traveling frame 9 serving as a skeleton provided with a vertical beam member 6, a horizontal beam member 7 and a support member 8, and the movable form device 1 is mounted on the rail 5 in the bridge axis direction. The traveling drive device 10 for moving the movable form device 1 is provided with a telescopic mechanism 11 for adjusting the height of the movable form device 1. The traveling frame 9 is provided with a joint portion 12 shown in FIG. Have been.

A column vertical support member 13 is provided between the vertical beam member 6 and the column member 8, and a column horizontal support member 14 is provided between the horizontal beam member 7 and the column member 8.

The column vertical support member 13 has one end connected to the lower end of the column member 8 and the other end connected to the lower surface of the end of the vertical beam member 6 to suppress the column member 8 from moving in the front-rear direction.

The column support member 14 has one end connected to the lower end of the column member 8 and the other end connected to the lower surface of the end of the cross beam member 7, thereby suppressing the horizontal movement of the column member 8.

A square is formed by the two left and right vertical beam members 6 and 6 and the two front and rear transverse beam members 7, and a column member 8 is provided downward from four corners of the square.

The traveling frame 9 is formed as a portal so as to form a space X (FIG. 1) as viewed from the front by the cross beam member 7 and the two support members 8.

The space X is designed to be used as a work space for assembling the reinforcing bars of the PC concrete slab 3, placing concrete, and performing other operations.

A connecting member 15 is interposed in the divided portion of the traveling frame 9 divided into three parts, and the joint portion 12 for connecting the divided traveling frame 9 is provided at a leading end of the connecting member 15. Is formed.

As shown in FIG. 1, a laterally extending beam member 16 is provided on both sides of the traveling frame 9.
Has a scaffold 17 formed downward, and a side formwork 18 for forming an overhang portion of the PC concrete slab 3 is provided on the scaffold 17.

The traveling drive device 10 is provided at the lower end of the support member 8 via an extension mechanism 11.

There are two types of the traveling drive device 10 including two wheels 19 and one type including one wheel 19.

The joint 12 will be described with reference to FIGS.

The connecting member 15 is formed at a portion extending from the vertical beam member 6, and a connecting portion 12 formed at a distal end portion of the connecting member 15 is connected to each joint bracket 20 and to the joint bracket 20. A pin 21 is inserted therethrough to form a vertically long slot 22 connecting the joint brackets 20, 20.

The traveling drive device 10 provided with two wheels 19 will be described with reference to FIGS.

The traveling drive device 10 includes a main body frame 23.
And a sprocket 26, 26 'for extending a chain 25 between a motor 24 for transmitting a rotational force to the wheels 19, and an upper portion of the main body frame 23 is provided by a pin 28.
It is connected to the telescopic mechanism 11.

The upper part of the main body frame 23 is connected to the telescopic mechanism 11 by a pin 28, and the telescopic mechanism 11 has a guide part 3 provided at the lower end of the column member 8.
0, and a slide portion 31 that can slide up and down the guide portion 30 is provided. A flange 32 of the guide portion 30 and a flange 32 ′ of the slide portion 31 are fixed by adjusting bolts 33 and nuts 34, 34. .

Loosen the nut 34 and fit the collar 32
The height is adjusted by changing the dimension between the above and tightening the nut 34 again.

At this time, the slide portion 31 can move up and down stably because the inner peripheral surface of the guide portion 30 and the outer peripheral surface of the slide portion 31 slide.

Thus, the traveling drive device 10 includes the motor 2
4, the vehicle travels by rotating the wheels 19 via sprockets 26, 26 and a chain 25.

FIG. 6 shows an embodiment of the traveling drive device 10 provided with one wheel 19, which is not equipped with the motor 24, sprockets 26, 26, chain 25 and the like. However, other configuration and operation are the same as those of the above-described embodiment.

The movable form device 1 having the above-described structure travels on the rail 5 by driving the motor 24 of the traveling drive device 10.

FIG. 3 shows a state in which the movable form device 1 follows the camber of the main girder 4.

The traveling frame 9 is rotated about a connecting pin 21 provided at a divided portion of the traveling frame 9 as a fulcrum,
The connecting pin 2 is inserted into the elongated hole 22 of the joint bracket 20.
1 is moved up and down to cause a vertical displacement in the divided portion of the traveling frame 9, so that all traveling driving devices 1
The zero wheel 19 can be brought into contact with the rail 5.

FIG. 9 shows a state of following the transverse gradient of the main girder 4.

Adjustment bolt 33 provided in extension mechanism 11
By adjusting the distance between the collar 32 and the collar 32, and changing the dimension between the collar 32 and the collar 32 ', the height of the movable form device 1 on the left and right sides is also adjusted.

[0045]

As described above, according to the invention of the present application, the above configuration allows the main girder and the rail of the bridge to be substantially aligned even if there is unevenness in the vertical direction due to the camber or the like of the main girder at the time of placing the concrete on the floor slab. Since the load of the traveling frame can be evenly applied, high work of Aza expedition can be performed quickly without damaging the rails.

In addition, since the rails can be reduced in strength, the weight of the rails can be reduced, and the load on the composite girder can be reduced, and an excellent effect of suppressing deflection can be obtained.

Further, since the length of the traveling frame can be arbitrarily changed, there is also an effect that a form device suitable for the length of the PC concrete can be formed.

Further, since one traveling frame is provided with two pairs of traveling driving devices, work during assembly and disassembly can be performed efficiently.

[Brief description of the drawings]

FIG. 1 is an overall schematic front view showing a connection type movable form device of one embodiment.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an enlarged cross-sectional view taken along the line AA showing a state where the movable form device of the present invention follows the camber of the main girder.

FIG. 4 is a side view of a traveling drive device having two wheels and a telescopic mechanism.

FIG. 5 is a sectional view taken along line BB of FIG. 4;

FIG. 6 is a side view of a traveling drive device having one wheel and a telescopic mechanism.

FIG. 7 is a side view of a joint.

FIG. 8 is a plan view of FIG. 7;

FIG. 9 is a front view showing a state where the movable form device follows the transverse gradient of the main girder.

[Explanation of symbols]

 Reference Signs List 9 traveling frame 18 side mold 10, 10 'traveling drive device 5 rail 1 movable mold device 11 telescopic mechanism 12 joint

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Ryuji Kai 8 Niijima, Harima-cho, Kako-gun, Hyogo Kawasaki Heavy Industries, Ltd. Harima Plant Uchikawa Heavy Construction Co., Ltd. No. 1 Kitagawa Iron Works Co., Ltd. (72) Inventor Akito Takahashi 77-1 Motomachi, Fuchu-shi, Hiroshima 1 Kitagawa Iron Works Co., Ltd. F-term (reference) 2D059 AA14 BB39 CC04 DD17

Claims (2)

[Claims] 1. A traveling frame is formed in a gate shape in a direction perpendicular to a bridge axis, and a form frame is suspended, and is movable on rails in a direction of a bridge axis by a traveling drive device mounted on the traveling frame. In the movable form device, the traveling frame includes at least a pair of traveling driving devices in a direction perpendicular to a bridge axis, and an expansion / contraction mechanism that adjusts a vertical height of the traveling frame between the traveling driving device and the traveling frame. A connection type movable form device, comprising a joint portion for connecting the traveling frame in a bridge axis direction. 2. The connection type movable form device according to claim 1, further comprising two pairs of traveling drive devices in a direction perpendicular to the traveling frame.