JPS60126408A - Support apparatus of heavy article such as bridge beam - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for supporting heavy objects such as bridge girders.

Otaki Jatsuki Co., Ltd., one of the applicants, developed a device for the intermittent transfer of heavy objects such as bridge girders.
No. 8-86685 was proposed. This "transfer device" is equipped with a support device in which a pedestal is connected to the upper end of the ram of a hydraulic jack, the support device is slidably installed on the bed of the machine frame, and the support device is rotated by a hydraulic motor. The structure is connected to a screw shaft, and the rotation of the screw shaft moves a support device that supports the structure along the shaft, thereby transporting the structure.

Although the transfer device described above has greatly improved transfer workability compared to conventional devices, it has been found that the "support device" still has the following problems.

In other words, Figures 1 and 2 show a device for transferring heavy objects such as a bridge girder. In the figure, 1 is the bridge girder to be transferred, A is the transfer device for this bridge girder 1, and 2 is the base of the entire device type. A frame, 8 is a fixed support device installed on one side of the base frame 2, B is a feeding device installed on the other side of the base frame 2, 4 is the bed, 5 is a movable support device that can be moved on the bed 4, 5a is a hydraulic jack, and 5b is a pedestal that is moved up and down by the hydraulic jack 5a.
penetrates the lower part of the hydraulic jack 5a, and the bed 4
The screw shaft is rotatably supported against the
This screw shaft 6 is driven by an m-pressure motor 7, and the movable support device 5 is reciprocated as shown by arrows C and D in FIG. 1 via a transmission member 8 that is threadedly engaged with the screw shaft 6. There is.

The transfer work of the bridge girder I by the transfer layer A is performed as follows.

First, extend the hydraulic jack 5a of the movable support device 5,
The bridge girder 1 is lifted upward from the fixed support device 3 and supported by the cradle 5b. Next, the screw shaft 6 is rotated to move the entire movable support device 5 by a predetermined stroke as indicated by arrow C, and the bridge girder 1 is transferred by the stroke.

After the movable support device 5 moves by a predetermined stroke, the hydraulic jack 5a is contracted and the bridge girder 1 is supported by the fixed support device 8. Then, the screw shaft 6 is reversely rotated to move the movable support device 5 in the direction of arrow 5D and return it to its original position. By repeating the above operations 1, the bridge girder 1
is transferred intermittently.

As the transfer work progresses, the support device i! When the amount of protrusion of the bridge girder 1 from 7'3°5 increases, the bridge girder l placed on the support device flexes as shown in Fig. 2,
As a result, a gap S is created between the upper surface of the pedestal 5b of the support bag N5 and the lower surface of the bridge girder l. For this reason, the bridge girder l is supported only at the two points P0 and P1 at both ends of the upper surface of the pedestal 5b. As a result of applying excessive force locally to P, there was a risk of damaging the 1" material.

The present invention was made to solve the above-mentioned problems.
The technical challenge is to change the upper surface of the pedestal, which serves as the receiving surface for heavy objects such as bridge girders, to match the deflection shape of heavy objects such as bridge girders, and to uniformly contact the receiving surface with the heavy object. It is an object of the present invention to provide a support device for a heavy object such as a bridge girder, which prevents damage to the heavy object by preventing excessive force from being applied to the heavy object and the pedestal.

In order to achieve the above technical problem, the present invention
) is provided with four rectangular parts on the top surface of the cradle for receiving heavy objects, and several pressure hoses with sleeves are arranged in parallel between the two opposing sides of the inner bottom of this recess, and a void is created in each of these hoses. The liquid is sealed leaving a
Place the first plates in parallel with each other perpendicular to the hose.
l! 12rlt, and each of these unit plates is fitted into the recess so as to be vertically movable, so that a heavy object is supported by the upper surface of each of these unit plates.

Embodiments of the present invention will be explained below with reference to FIGS. 8 to 5. In the figure, the same reference numerals as the above-mentioned reference numerals indicate equivalent parts.

As shown in FIGS. 8 to 5, the movable support device 5 of this embodiment includes a hydraulic jack 5a and a pedestal 5b connected to a ram 50 of the hydraulic jack 5a. The pedestal 5b is for receiving a heavy object such as the bridge girder 1, and has four rectangular parts 9 provided on its upper surface. This four part 9 is formed by fixing a frame 10 to the upper surface of the pedestal 5b, and a plurality of -°□ (in this embodiment, 11 2) pressure hoses 11 are arranged side by side.

The pressure hose 11 indirectly bears the weight of the heavy object 1, and in order to prevent damage, it is best to insert a cushioning material 12 made of Teflon rubber or the like on the bottom of the four parts 9. Inside the pressure hose 11, a gap of about 20% of the cross-sectional area of the space is left, and a liquid such as oil is sealed therein and sealed with a plug 18. The void in the hose 11 is provided to provide the necessary degree of freedom for the flow of the working fluid. Both ends of the pressure-resistant 1'□ hose 11 sealed by a plug 18 penetrate the short side wall of the frame 10 and project outward, and the projecting parts are covered with a cover 14, respectively. The pressure-resistant hoses 11 arranged in parallel are arranged such that adjacent hoses are in contact with each other, so that deformation of the hoses beyond a predetermined level is mutually restricted.

Further, on the upper surface of these pressure-resistant hoses 11, a plurality of rectangular unit plates 15 (one plate (9 plates in this embodiment)) are provided as receiving plates for heavy objects.
are placed in parallel so as to be orthogonal to the hose 11, and each of these unit plates 15 is fitted inside the frame 1O so as to be vertically movable, so that the upper surface of each of these unit plates 15 To support heavy objects.

That is, the upper surface of each unit plate 5 is made to protrude from the upper surface of the frame 10. Also, between each nest plate 15, there is a unit plate 1.
A guide member 16 that guides the vertical movement of the frame IO and restricts the inclination and horizontal movement of each unit plate 15 is provided protruding inside the long side of the frame IO.

Next, the operation of the apparatus of the present invention constructed as described above will be explained.

The support device 5 of this embodiment supports a heavy object l such as a bridge girder on the unit plate 15 which is the receiving plate of the pedestal 5b. unit plate 15
When the bridge girder l is bent, the receiving surface made up of each unit plate 16 changes to follow the bent shape.In other words, when the bridge girder l is bent, each unit plate 15 making up the receiving plate changes. In order to apply an equal load, the working fluid in each pressure hose 11 flows, changing the amount of deformation and sinking of each part in the length direction of the pressure hose 11, and causing each unit plate 15 to The amount of protrusion changes depending on the distance l to the lower surface of the bridge girder 1. Therefore, each unit plate 15 comes into contact with the lower surface of the bridge girder l, so that the entire receiving surface conforms to the deflection shape of the bridge girder 1. The bridge girder 1 comes into uniform contact with the bridge girder 1. Therefore, according to the present invention, no excessive force is applied to the structure such as the bridge girder, and damage to the structure can be prevented.

Furthermore, minute irregularities caused by manufacturing errors between a structure such as a bridge girder and the pedestal 5b can be absorbed by each divided unit plate 15, so this 1".

Local damage to the structure due to unevenness can also be reliably prevented according to the present invention.

Since the apparatus of the present invention is as described above, by equipping the transfer apparatus A shown in FIG. 1 with this support apparatus, it is possible to reliably eliminate the problems of the conventional apparatus mentioned in I7 above.

Incidentally, since the fixed support device 8 in FIG. 1 also supports a structure, if the present invention is applied to this support device 8, the same effect can be achieved.

As described above, according to the present invention, the heavy object such as a bridge girder and the receiving surface of the support device can be brought into constant contact with uniform pressure, so that no undue force is applied to the structure. An excellent effect can be obtained in that damage to structures can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing an example of a conventional transfer device, Fig. 2 is an explanatory view of its operation, Fig. 8 is a longitudinal sectional front view showing the support device of the present invention, and Fig. 4 is a plan view thereof. FIG. 5 is a sectional view taken along the line ■-■ in FIG. 8. 1... Bridge girder A... Transfer device 2... Base frame 8... Fixed support device B...
・Feeding device 4...Bed 5...Movable support @Sa...Hydraulic jack □5
b... Rest 9... Recess IO... Frame 11... Pressure resistant hose 12... Cushioning material 18... Plug ■4... Cover 15... Unit plate 16... Guide Element.

Claims (1)

[Claims] 1. Four rectangular parts are provided on the top surface of the pedestal for receiving heavy objects,
A plurality of pressure-resistant hoses are arranged in parallel between two opposing sides of the inner bottom of this recess, a gap is left in each of these hoses to seal liquid, and a plurality of unit plates are placed on the top surface of these hoses. These unit plates are placed in parallel so as to be orthogonal to the hoses, and each of these unit plates is fitted into the recessed portion so as to be vertically movable, so that the upper surface of each of these unit plates supports a heavy object. A support device for heavy objects such as bridge girders, characterized by the following features: