JPH04108905A - Falsework apparatus for bridge - Google Patents

Abstract

PURPOSE:To make support mechanisms movable even if any obstacle protrudes at the lower end of either one of beam members by arranging at least three sets of support mechanisms which can stretch laterally along bridge per a pair of right and left beam members. CONSTITUTION:At least three sets of support mechanisms 41,42 which can stretch laterally along a bridge A are arranged longitudinally on a pair of right and left beam members 31,32. Then side rollers 61,62 formed on respective support mechanisms 41,42 are brought into contact with sides of the beam members 31,32. And each of support mechanisms 41,42, is allowed to run along each of lower end flange surfaces of the beam members 31,32 by means of a running wheel 51 provided in each of the support mechanisms 41,42. Thus even if any obstacle protrudes from the lower end flange surfaces, one set of the support mechanisms 41,42 stretch while two other sets of the support mechanisms 41,43 support the beam members 31,32 to make free running.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a scaffolding device mainly for inspecting and repairing the underside of a bridge. This relates to a scaffolding device that is suspended from the lower end flange of the scaffolding device and is movable in the length direction.

[Prior Art] Flange portion 1 formed at the lower end of members 11a and 12a
1b and 12b and suspended from the bridge. Then, as shown in FIG. 9, the clamps 5a and 6a are opened and closed alternately to remove the moving rails 2a and 2a and the hanger 3a.
By alternately moving the scaffolding devices 3a, the scaffolding device 4a is moved along the bridge 7a in its longitudinal direction.

This bridge scaffolding device is configured to move the opened clamps 5a and 6a that grip the flange parts 11b and 12b, so for example, the flange part 1
Even if there are protrusions such as bolt heads on 1b and 12b, they can be moved without any problem.

[Problem to be Solved by the Invention] However, in recent years, many long bridges have been constructed, and in order to efficiently inspect and repair the undersides of these bridges, the conventional bridge scaffolding device has been designed to be used in the longitudinal direction along the bridges. Scaffolding equipment that can be moved is sometimes installed, and the one shown in Fig. 8 is known as a working vehicle for this purpose.

That is, this scaffolding device for a bridge has an appropriate length that is suspended from a pair of girder members 11a and 12a among a plurality of girder members 1a made of steel materials having an I-shaped cross section, for example, arranged in the left-right direction and installed on a bridge pier. A pair of moving rails 2a, 2a,
It is provided with hangers 3a, 3a which are fitted and supported by the moving rails 2a, 2a and are movable, and a scaffold 4a whose left and right ends are supported at the lower ends of these hangers 3a, 3a. Then, the movable rails 2a, 2a and hangers 3a, 3a are provided with openable/closable ramps 5a, 6a projecting above them.
, 3a is formed to be equal to the spacing between the girder members 11a, 12a that are suspended and supported, and remains unchanged.

Therefore, when the width of the girder members 11a and 12a, that is, the width of the bridge 7a changes, there is a problem that the girder cannot be moved and can only be used for bridges of a constant width.

The present invention was made in view of the above circumstances, and it is possible to move even if obstacles such as bolt heads protrude from the lower end flange of the girder member, and the width of the bridge is The object is to provide a scaffolding device that can be used even when changing.

[Means for Solving the Problems] A first invention for solving the above-mentioned problems is to suspend both left and right ends of a scaffold, which is extendable and retractable in the left and right directions of a bridge, respectively to a pair of left and right surgical members installed on a bridge pier. At least three sets of suspended support mechanisms are arranged in front and back, and each of the support mechanisms includes side rollers that contact each side of the pair of surgical site shrines, and running wheels that run on the lower end flange surface of the surgical member. Each of the traveling devices is equipped with a retraction mechanism that operates independently to levitate each of the traveling wheels from the flange surface, and furthermore, the scaffolding is provided with an inner frame and an outer frame. Both frames have a pointed shape, and the side rollers provided on each frame are urged in the direction of contacting the side surface of the surgical member, and are connected to each other so that they can expand and contract in the left-right direction. Further, the second invention has a configuration in which among a plurality of surgical members arranged in the left-right direction and installed on the pier, each of the surgical members on both valve sides is connected so as to be extendable and retractable.

[Function] The width of the scaffold suspended from the support mechanism is changed in accordance with the change in the interval between the surgical members suspending the pair of support mechanism groups. Further, if there is an obstacle on the flange surface on which the running wheel runs, the running wheel is floated from the flange surface to pass the obstacle. At this time, the scaffold is suspended and supported by the remaining support mechanism.

[Example] Next, embodiments of the present invention will be described with reference to the drawings.

Figures 1 to 4 show an embodiment of the first invention, in which the lower ends are respectively connected to the left and right ends of a scaffold l that is extendable and retractable in the left and right directions of the bridge, and are arranged in pairs facing each other. At least three pairs of left and right running parts are arranged in front and back and are extendable and retractable in the left and right directions. It consists of a scaffold that is extendable and retractable, and a hanging member that connects the pair of running parts to both left and right ends of the scaffold, and each support mechanism includes a side roller that is in contact with each side of each pair of surgical members. and a running wheel that runs on a lower end flange surface of the surgical site, and each of the traveling devices is provided with a retraction mechanism that operates independently to lift each of the running wheels from the flange surface, Furthermore, each support mechanism is composed of an inner frame and an outer frame, and the side rollers provided on each of the frames are urged in a direction that contacts the side surface of the surgical member, so that they are aligned in the left-right direction with respect to each other, and are aligned in the left-right direction. Among the four surgical site shrines 3 with a cross section of ■ shape built on the pier 2, a pair of surgical members 31 located on the − side.
．． Three sets of support mechanisms 41 and 42, each suspended from the support mechanism 32, are arranged in front and back. Outer support mechanism 41
has an evacuation mechanism 45 consisting of a horizontal rank mechanism 43 whose fixed joint is the outer frame 11 of the scaffold 1, and a drive section 44 consisting of hydraulic cylinders arranged diagonally to each other that operate independently. A traveling device 5 is disposed at a connecting portion between a link 46 and a horizontal link 47 that form a crank. This traveling device 5 is the surgical member 3 of the surgical member 31.
1, a running wheel 51 that runs on the upper surface of the flange portion 34 at the lower end of the surgical member 81, and a motor, a speed reducer, etc. for rotating this running wheel 51, and this running wheel 51. The drive unit 52 is configured to levitate the traveling wheels 51 from the upper surface of the flange portion 34 by the operation of the shunting mechanism 45. On the other hand, the support mechanism 42 on the inner surgical member 32 side has a base 36 erected on the inner frame of the scaffold 1 and a side roller 62 that contacts the outer surface 35 of the surgical member 32 supported via a turnbuckle 37. ing.

Furthermore, the scaffold 1 is composed of an outer frame 11 and an inner frame 12 that are fitted to each other so as to be able to expand and contract in the left and right directions, and both frames 11 and 12 are biased in the contraction direction by a tension spring 71, and this biasing force As a result, both side rollers 61, 62 are in pressure contact with the opposite sides of the surgical member 31, 32, respectively. The tension spring 71 has one end attached to the outer frame 12.
Each traveling device 5 is fixed to the surgical member 31. The scaffolding 1 is moved to a desired inspection or repair position of the bridge by rotating the traveling wheels 51 of the two in the same direction and speed by the respective drive units 52, or by operating only one of the drive units 52. It is something that makes you Even if the distance between the surgical members 31 and 32 changes during movement, the surgical members 31 and 32 can be moved without any problem.

That is, since both frames 11.12 constituting the scaffold 1 are urged in the direction of approaching each other by the tension spring 71, when both phase members 31.32 approach each other, the hoisting device 8
4 to wind the cable 83 of the pulley device 8 as much as necessary to bring the movable pulley 82 closer, and adjust the length of the cable 73 wound around the hoisting device 72 provided on the frame 11. This allows the tensile strength to be adjusted. In addition, a pulley device 8 is provided, which includes a fixed pulley 81 provided on the outer frame 11 and a movable pulley 82 provided on the inner frame 12. By winding the other end of 83 around the winding device 84, both frames 11.12 can be stretched in accordance with the widening of the interval between the side rollers 61.62, and the surgical members 31.32
The length of the scaffold 1 in the width direction can be adjusted according to the interval between the scaffolds 1 and 1.

In an embodiment having such a configuration, normally three sets of support mechanisms 41, 42, respective side rollers 61, 62, and a pair of surgical members 81, 32 are used, when the distance between the two phase members 31, 32 is widened. The winding device 72 connects both cables 73 and 83.
．． It is sufficient to extend the tension spring 71 by an amount corresponding to the increase in the distance between the frames 11 and 12 while maintaining the tension spring 71 at an appropriate tension.

Further, obstacles such as bolt heads protrude from the upper surface of the flange portion 34 formed at the lower end of the surgical member 31, and the running wheels 5
1 is difficult or impossible to pass, the rank mechanism 43 that parallels the drive section 44 of the support mechanism 41 approaching the obstacle is erected, and the traveling device 5 is moved in the direction away from the surgical member 31. As shown in FIG. 4, it is sufficient to pass the obstacle with the traveling wheels 51 floating above the upper surface of the flange portion 34, and then return the traveling device 5 to its original position after passing the obstacle.

At this time, the support mechanism 41 that allows the obstacle to pass cannot maintain a suspended state because it moves both the running wheels 51 and the side rollers 61 away from the surgical member 31 by raising the crank mechanism 43. Therefore, the remaining two sets of support mechanisms 4
1.42, scaffold 1 will be suspended and moved.

As described above, according to the present embodiment, even if an obstacle such as a bolt head protrudes from the flange portion 34 of the surgical member 31.32, it is of course possible to pass through the surgical member 81.32 while continuously moving. Even if the width of the bridge 32, that is, the width of the bridge A changes, by expanding and contracting the scaffold 1, it is possible to move to a desired inspection or repair location without any problem.

In this embodiment, the two side rollers 61, 62 in contact with the side surfaces of the surgical member 31, 32 and the upper surface of the flange portion 34 at the lower end of the surgical member 31 urge both frames 11, 12 in the direction of extension. The pulley device 8 can be omitted.

FIG. 5 shows a second embodiment of the first invention, and the overall structure of this embodiment is almost the same as that of the first embodiment, except that the inner support mechanism 42 is replaced with the outer support mechanism 41. A similar configuration is provided with side rollers 61, 62 and running wheels 51, 51 provided on the rank mechanism 43 parallel to both support mechanisms 41, 42, respectively. 1 can be suspended and supported.

6 and 7 show an embodiment of the second invention, in which a plurality of surgical members 31, 32, 38, 39, 40 are installed on the pier 2 at predetermined intervals in the left and right direction. The scaffold 1 is suspended and supported on the surgical members 31.32 using one running wheel 51 for each pair of surgical members 31.32 and 39.40 on the outside of the surface, and When passing an obstacle protruding from the upper surface of the flange portion 34, only the traveling wheel 51 side needs to be floated, and the operation is easy, the structure is not complicated, and it is advantageous in terms of cost. Further, in this embodiment, the outer frame 11 and the inner frame 12 connected to the lower end of the support mechanism 41.42 are biased toward each other by the tension spring 71, and the side rollers 61.62 are moved toward the surgical member 31.32. Although the configuration is such that the side rollers 61.62 provided on the support mechanism 41.42 are pressed against the outer surface of the surgical member 31.32, any means may be used. Furthermore, the side rollers 61 and 62 are connected to the surgical site shrines 31 and 32.
In this case, it is suspended and supported so that it can run in the longitudinal direction.It is made up of four sets of support mechanisms 41 and 42, each of which is extendable and retractable in the left and right directions. parts 91 and 92, and a scaffold 13 whose length in the left and right direction is slightly wider than the width of the bridge A and which can be expanded and contracted in the left and right directions.
and a pair of hanging members 93.94 connecting the pair of traveling parts 91.92 and both left and right ends of the scaffold 13. The support mechanism 41.42 of the running section 91.92 has the same construction as that shown in the scaffolding device of the first embodiment of the first invention shown in FIGS. 1 and 2. Therefore, detailed description of the support mechanisms 41, 42 will be omitted.

Each of the four sets of support mechanisms 41 and 42 extends in the longitudinal direction of the bridge A, and the upper connecting frame 9 is slightly longer than the scaffolding 13.
5, the lower ends of the hanging members 93 and 94 connected to both longitudinal ends of each upper connecting frame 95 are connected to the upper connecting frame 9.
A lower connecting frame 96.5 having the same length as the upper connecting frame 95 is fixed to the upper connecting frame 95 so as to be rotatable by a pivot shaft 97. A pair of running parts 91 and 92 are connected to both longitudinal ends exposed from the scaffold 13 of 96.
and a scaffold 13 are connected to be pivotable over a certain range. Furthermore, the scaffolding 13 includes a pair of three frames 14,
15.16 telescoping type extendable and retractable parts are arranged oppositely on the left and right and connected.

This embodiment differs from the embodiment of the first invention in that the scaffolding 13
It is possible to carry out inspection and repair work over the entire width of the bridge A, and according to the present invention having the above-described configuration, it is possible to carry out inspection and repair work over the entire width of the bridge A. It is easy to use and can be moved freely to the desired inspection or repair area even if an obstacle such as a bolt head protrudes from the flange formed at the lower end of the girder member or the width of the bridge changes. It is something.

[Brief explanation of the drawing]

1 and 4 show the installed state in an embodiment of the first invention, in which FIG. 1 is a front view, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. The figure is a partial enlarged sectional view of FIG. 1, FIG. 4 is a partial view showing the operating state in FIG. 3, FIG. 5 is a partial enlarged sectional view of a different embodiment of the first invention, and FIGS. 6 and 7. 9 shows the installed state in an embodiment of the second invention, and shows the installation state of the second traveling part 91.
Since the support mechanisms 41 and 42 of 92 have the same structure and operation effect as the scaffolding device of the first invention, the support mechanisms 41 and 42 of the girder member 31
．． Even if the widths of the flange portions 32 and 39.40 change or there is an obstacle on the upper surface of the flange portions 34, they can be moved without any problem due to the same effect as described above. Also,
In this embodiment, the scaffolding 13 is expandable and retractable, and can sufficiently cope with changes in the width of the bridge A. In addition, in this embodiment, the support mechanism 41.4 of the running section 91.92
2 had the same configuration as that shown in the scaffolding device of the first embodiment of the first invention shown in FIGS. 1 and 2, but
The structure may be similar to that shown in the scaffolding device of the second embodiment of the first invention shown in FIG. [Effects of the Invention] Fig. 6 is a front view, Fig. 7 is a sectional view taken along the line ■-■ in Fig. 6, Figs. 8 and 9 show conventional examples, and Fig. 8 shows the installed state. The perspective view shown in FIG. 9 is a schematic explanatory diagram showing the moving method. 1...Scaffolding, 2...Bridge pier, 5...Travel device,
8...Pulley device, 13...Scaffolding, 31.32...
Girder member, 41.42...Support mechanism, 45...Evacuation mechanism, 51...Travelling wheel, 61.62...Side roller, Procedural amendment (voluntary) Request for permission on October 11, 1990 1990 Name of Patent 2 Invention Bridge Scaffolding Device 3 Relation to Case No. 227675 Patent Applicant Name Mitsui Miike Manufacturing Co., Ltd. 4 Agent (104) Address 3-5 Kyobashi, Chuo-ku, Tokyo No. 3 (Takegashi Building) Address: Same Claim 1: A support mechanism in which both left and right ends of a scaffold that can be expanded and contracted in the left and right directions of the bridge are suspended from a pair of left and right companion members installed on the bridge piers. are arranged in front and back in at least three sets, and each of the support mechanisms includes side rollers that are in contact with the side surfaces of each of the phase members, and running wheels that run on the lower end flange surface of the phase member; 1. A scaffolding device for a bridge, characterized in that each of the traveling devices is provided with a shunting mechanism that operates independently to levitate each of the traveling wheels from the flange surface.2. It consists of an inner frame and an outer frame, and the direction in which the side rollers provided on each frame touch the side surface of the companion member (1) The scope of the claims is amended as shown in the attached sheet. (2) Specification No. Page 8, line 10, next to “Traveling wheels” [
Add a traveling device with ".

Claims (1)

[Scope of Claims] 1. At least three sets of support mechanisms are lined up in front and back, each of which has both left and right ends of a scaffold that is extendable and retractable in the left and right directions of the bridge suspended from a pair of left and right girder members installed on the bridge piers. Each of the support mechanisms includes side rollers in contact with each side surface of the girder member, and running wheels running on the lower end flange surface of the girder member, and each of the traveling devices operates independently. A scaffolding device for a bridge, further comprising a shunting mechanism for floating each of the running wheels from the flange surface. 2. A claim in which the scaffold consists of an inner frame and an outer frame, and both frames are coupled to each other so that the side rollers provided on each frame are urged in a direction that contacts the side surface of the girder member so that they can expand and contract in the left-right direction. 1. The bridge scaffolding device according to item 1. 3. Suspended by at least three sets of support mechanisms that are extendable and retractable in the left and right direction and arranged opposite each pair on both outer sides of a plurality of girder members that are lined up in the left and right direction and installed on the piers. a pair of left and right running sections that are capable of traveling in the longitudinal direction; a scaffold that has a length in the left and right direction that is approximately the same width as the bridge and is extendable and retractable in the left and right directions; the pair of running sections and both left and right ends of the scaffold; each support mechanism includes a side roller that contacts each side surface of each girder member, and a running wheel that runs on a lower end flange surface of the girder member, and each of the support mechanisms includes a A scaffolding device for a bridge, comprising a shunting mechanism that operates independently to levitate each of the traveling wheels from the flange surface. 4. Each support mechanism consists of an inner frame and an outer frame, and these frames are coupled to each other so that the side rollers provided on each frame are urged in a direction that contacts the side surface of the girder member so that they can expand and contract in the left-right direction. 4. The bridge scaffolding device according to claim 3.