Hand-extending machine and launching method using hand-extending machine

Abstract

To provide a hand-extending machine and a launching method using the hand-extending machine, which can safely erecting a girder member on a first support part and a second support part without applying unnecessary external force to the second support part to cause it to fall, even if the hand-extending machine is lowered for launching.SOLUTION: In a launching method, in which a hand-extending machine 10 is connected to the tip side Lf of the bridge axis direction L and the girder member 1 is launched, and the girder member 1 is rigged from a gantry 100 to a pier 110, the hand-extending machine 10 is provided with a mounting adapter 50 arranged on the base end side Lb, a tip movable part 30 arranged on the tip side Lf, and a lifting / lowering connection mechanism 40 arranged between the mounting adapter 50 and the tip movable part 30, and the lifting / lowering connection mechanism 40 is configured to connect the tip movable part 30 in a substantially parallel position to the mounting adapter 50 so that it can be raised and lowered.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a sending method for bridging a girder member between support parts such as piers and abutments, and a hand-extending machine connected to the tip side of the girder member in the sending method.

Background Art

[0002] Conventionally, in a case where a truck crane cannot be installed under a girder at a location straddling a river, road, railway, etc., a hand-extending machine is connected in advance to the tip of the girder member, and the girder member is sent out from one pier or the like toward the other pier or the like for erection. A sending method is being carried out.

[0003] However, when the sending distance becomes long, the tip side sags due to the weight, so it is sent out after being lifted in advance, or as in Patent Document 1, the tip of the hand-extending machine that has dropped below the sending line is lifted and erected on the pier or the like at the sending destination.

[0004] Specifically, the adjustment method in Patent Document 1 is as follows: when the lower surface of the tip of the hand-extending machine drops below the sending line on the upper surface of the rotating roller due to the deflection of the hand-extending machine, the hinge part at the base end of the tip of the hand-extending machine is used as a fulcrum, and the tip of the hand-extending machine is lifted above the sending line by a hydraulic jack. While keeping it lifted, the lower surface of the tip of this hand-extending machine is made to reach the rotating roller. When it reaches, the transfer is stopped, and the connecting part between the tip of the hand-extending machine and the main body of the hand-extending machine is lifted by a hydraulic jack with the rotating roller as a fulcrum to make the hand-extending machine substantially straight, and the hand-extending machine is transferred on the rotating roller. It is said that the hand-extending machine can be smoothly transferred.

[0005] However, when the connecting part between the tip of the hand-extending machine and the main body of the hand-extending machine is lifted by a hydraulic jack with the rotating roller as a fulcrum to make the hand-extending machine substantially straight, a horizontal force acts on the pedestal such as a pier where the rotating roller is provided, so there is a risk that the pedestal may tip over.

Prior Art Documents

Patent Documents

[0006] Patent Document 1 Japanese Patent Application Laid-Open No. 2014-105484 Summary of the Invention Problems to be Solved by the Invention

[0007] Therefore, in the present invention, even when the noodle stretching machine descends due to feeding, the noodle member can be safely installed between the first support portion and the second support portion without applying an unnecessary external force that causes the noodle stretching machine to fall onto the second support portion. An object of the present invention is to provide a noodle stretching machine and a feeding method using the noodle stretching machine. Means for Solving the Problems

[0008] In this invention, in a feeding method for feeding a noodle member connected to a noodle stretching machine on the tip side in the feeding direction and bridging the noodle member from a first support portion to a second support portion, the noodle stretching machine includes a base portion disposed on the noodle member side, a tip movable portion disposed on the tip side, and an intermediate portion disposed between the base portion and the tip movable portion. The intermediate portion is a lifting connection mechanism that connects the tip movable portion so as to be able to move up and down in a posture substantially parallel to the base portion. A feeding support body provided on the upper part of the second support portion and supporting the noodle member so as to be able to feed the noodle member, feeds the noodle member so that the tip movable portion lifted with respect to the base portion by the lifting connection mechanism is supported, and supports the tip movable portion with the feeding support body; a tip movable portion support step; a height adjustment step of raising the base portion to the same height with respect to the tip movable portion supported by the feeding support body by operating the lifting connection mechanism so that the tip movable portion raised with respect to the base portion relatively descends while the tip movable portion is supported by the feeding support body; and a slide feeding step of further feeding the noodle stretching machine with the tip movable portion supported by the feeding support body by sliding the feeding support body.

[0009] The present invention also relates to a noodle stretching machine connected to the tip side in the feeding direction of a girder member bridging from a first support portion to a second support portion, comprising a base portion disposed on the girder member side, a tip movable portion disposed on the tip side, and an intermediate portion disposed between the base portion and the tip movable portion, wherein the intermediate portion is a lifting and connecting mechanism that connects the tip movable portion so as to be able to move up and down in a posture substantially parallel to the base portion.

[0010] The above-mentioned first support portion and second support portion refer to those that support the erected girder member, such as piers, abutments, or pedestals such as bents. The base portion to which the tip movable portion is connected via the intermediate portion may be the noodle stretching machine body itself, or may be a mounting adapter that attaches the intermediate portion that connects the tip movable portion to the base portion.

[0011] The above-mentioned feeding support body may have any structure as long as it can support the noodle stretching machine and the girder member in a substantially horizontal direction by a rolling body that rotates around a substantially horizontal rotation axis orthogonal to the feeding direction, and may be a support body with an appropriate structure that can be fed.

[0012] The lifting and lowering of the tip movable portion in a posture substantially parallel to the base portion described above means that, for example, if the base portion is substantially horizontal, the tip movable portion moves up and down while maintaining a substantially horizontal posture, that is, it moves up and down while maintaining a state where the posture of the tip movable portion is substantially parallel to the posture of the base portion. Note that the lifting and connecting mechanism for lifting and lowering the tip movable portion substantially parallel to the base portion can be configured by a link mechanism, a lifter, or the like.

[0013] According to the present invention, even when the noodle stretching machine descends due to feeding, the girder member can be safely installed between the first support portion and the second support portion without applying an unnecessary external force that causes it to fall onto the second support portion. Specifically, the hand-rolling machine is provided with a base portion disposed on the side of the digit member, a tip movable portion disposed on the tip side, and an intermediate portion disposed between the base portion and the tip movable portion. And since the intermediate portion is a lifting connection mechanism that connects the tip movable portion so as to be able to move up and down in a posture substantially parallel to the base portion, the tip movable portion can be moved up and down while maintaining a posture substantially parallel to the base portion.

[0014] Also, on the delivery support body provided on the upper part of the second support portion and supporting the digit member so as to be able to be delivered, the digit member is sent out so that the tip movable portion lifted with respect to the base portion by the lifting connection mechanism is supported, and a tip movable portion support step of supporting the tip movable portion by the delivery support body is performed, so that even if the hand-rolling machine descends due to the delivery, the tip movable portion can be supported by the delivery support body of the second support portion.

[0015] And in the height adjustment step, with the tip movable portion supported by the delivery support body, the lifting connection mechanism is operated so that the tip movable portion lifted with respect to the base portion relatively descends, so as to raise the base portion to the same height with respect to the tip movable portion supported by the delivery support body. Therefore, the hand-rolling machine lowered from the delivery support body can be raised to a predetermined position.

[0016] At this time, when the lifting connection mechanism is operated so that the tip movable portion lifted with respect to the base portion relatively descends with the tip movable portion supported by the delivery support body, since the descent of the tip movable portion is restricted by the delivery support body, the base portion rises, but the base portion can be moved up and down in a state substantially parallel to the tip movable portion. Therefore, the hand-rolling machine can be raised to a predetermined position without applying an unnecessary external force that causes it to fall to the second support portion provided with the delivery support body. And by sliding the delivery support body and further sending out the hand-rolling machine with the tip movable portion supported by the delivery support body, the digit member can be safely installed between the first support portion and the second support portion.

[0017] As an aspect of the present invention, before the step of supporting the tip movable part, a near feeding step of feeding out the beam member so that the tip movable part of the noodle stretching machine approaches the second support part, and the tip movable part fed out to the vicinity of the second support part are raised by the elevating connection mechanism with respect to the base part may be performed.

[0018] According to the present invention, the tip movable part of the noodle stretching machine that is fed out to the vicinity of the second support part in the near feeding step and lowered by its own weight can be raised to a height at which the tip movable part can be supported by the feeding support body in the tip movable part raising step, and in the subsequent tip movable part supporting step, the tip movable part can be supported by the feeding support body of the second support part.

[0019] Also, as an aspect of the present invention, before the step of supporting the tip movable part, a tip movable part raising step of raising the tip movable part by the elevating connection mechanism with respect to the base part, and a near feeding step of feeding out the beam member so that the noodle stretching machine with the tip movable part raised approaches the second support part may be performed.

[0020] According to the present invention, in the tip movable part raising step, the noodle stretching machine in a state where the tip movable part is raised with respect to the base part is fed out so as to approach the second support part, and in the subsequent tip movable part supporting step, the tip movable part can be supported by the feeding support body of the second support part.

[0021] Also, as an aspect of the present invention, the elevating connection mechanism is a parallel link mechanism provided with two link parts that rotatably connect the tip side of the base part and the base end side of the tip movable part, and a drive part for operating the parallel link mechanism is provided. By driving the drive part, the base part and the tip movable part may be relatively raised and / or lowered.

[0022] According to the present invention, the base part and the tip movable part can be relatively raised, lowered, or raised and lowered in a substantially parallel state with a simple structure. Also, when the driving unit operates the parallel link mechanism so that the tip movable part relatively descends with respect to the base part while the tip movable part is supported by the feeding support body, since the descent of the tip movable part is restricted by the feeding support body, the base part ascends, but the base part can be moved up and down in a state substantially parallel to the tip movable part.

[0023] Also, at this time, along with the ascent and descent of the base part, the tip movable part is fed out while being supported by the feeding support body. Therefore, the noodle-making machine can be raised to a predetermined position and fed out in the feeding direction without applying an unnecessary external force that may cause it to topple to the second support part provided with the feeding support body.

[0024] Also, as an aspect of the present invention, one of the two link parts is an upper-stage link that rotatably connects the upper part on the tip side of the base part and the upper part on the base end side of the tip movable part, and the other of the two link parts is a lower-stage link that rotatably connects the lower part on the tip side of the base part and the lower part on the base end side of the tip movable part. The driving unit is composed of a driving connection part that connects at least one of the vicinity of the tip side and the base end side of the upper-stage link and the vicinity of the other of the tip side and the base end side of the lower-stage link so as to enable at least one of proximity and separation. By driving the driving connection part, the base part and the tip movable part may be relatively moved up and down at least one of them.

[0025] The above-described driving connection part includes an appropriate configuration such as a configuration that is telescopically connected like a telescopic jack, a traction device that pulls the vicinity of one of the tip side and the base end side of the upper-stage link and the vicinity of the other of the tip side and the base end side of the lower-stage link so as to be close to or separated from each other.

[0026] According to the present invention, by driving the drive connection part, one of the vicinity of the tip side and the base end side of the upper link and the vicinity of the other of the tip side and the base end side of the lower link are brought closer, separated, or both, and the base part and the tip movable part can be relatively raised, lowered, or raised and lowered in a substantially parallel state.

[0027] Also, as an aspect of the present invention, an intermediate connecting body that rotatably connects the vicinity of the middle of the upper link and the vicinity of the middle of the lower link is provided. The drive connection part includes a first drive connection part that connects one of the vicinity of the tip side and the base end side of the upper link and the vicinity of the lower connection part on the lower side of the intermediate connecting body, and a second drive connection part that connects the other of the vicinity of the tip side and the base end side of the lower link and the vicinity of the upper connection part on the upper side of the intermediate connecting body. By driving the first drive connection part and the second drive connection part synchronously, the base part and the tip movable part may be relatively raised and / or lowered at least one of them. According to the present invention, by driving a plurality of drive connection parts, the base part and the tip movable part can be relatively raised, lowered, or raised and lowered in a substantially parallel state efficiently.

[0028] Also, as an aspect of the present invention, the lower part where the lower link is connected may protrude toward the tip side from the upper part where the upper link is connected in the base part, and the upper part where the upper link is connected may protrude toward the base end side from the lower part where the lower link is connected in the tip movable part.

[0029] According to the present invention, in the relative raising and lowering of the base part and the tip movable part by the parallel link, a state of being accurately parallel can be maintained. Further, in a state where the tip movable part is raised with respect to the base part, it is possible to prevent the distance between the upper link and the lower link from becoming narrow, and to prevent interference between the upper link or the lower link and the drive connection part, and a decrease in the rigidity of the lifting and lowering connection mechanism.

Effects of the Invention

[0030] According to the present invention, even when the stretching machine descends due to feeding, the string member can be safely installed between the first support portion and the second support portion without applying an unnecessary external force that causes the machine to fall onto the second support portion. A stretching machine and a feeding method using the stretching machine can be provided.

Brief Description of the Drawings

[0031]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiments for Carrying Out the Invention

[0032] One embodiment of this invention will be described below together with the drawings. FIG. 1 shows a schematic explanatory diagram for explaining the feeding method, FIG. 2 shows a schematic perspective view of the height adjustment device 20, FIG. 3 shows a schematic front view of the height adjustment device 20, FIG. 4 shows a flow chart of the feeding method, and FIGS. 5 to 7 show schematic explanatory diagrams for explaining the steps of the feeding method.

[0033] Specifically, FIG. 1(a) shows a schematic front view before the start of feeding in the feeding method, and FIG. 1(b) shows a schematic front view in the installed state in the feeding method. Fig. 5(a) shows a schematic front view of the near-end feeding step (step s1), Fig. 5(b) shows a schematic front view of the slide feeding step (step s5), Fig. 6(a) shows a schematic enlarged front view of the near-end feeding step (step s1), and Fig. 6(b) shows a schematic enlarged front view of the tip movable part raising step (step s2). Further, Fig. 7(a) shows a schematic enlarged front view of the tip movable part supporting step (step s3), and Fig. 7(b) shows a schematic enlarged front view of the height adjustment step (step s4).

[0034] In Fig. 1, the left-right direction is defined as the bridge axis direction L which is the extending direction of the digit member 1 in the feeding method, the left side of Fig. 1 is defined as the tip side Lf in the direction of feeding the digit member 1, and the right side is defined as the base end side Lb. Also, the up-down direction in Fig. 1 is defined as the height direction H, the upper side is defined as the upper Hu, and the lower side is defined as the lower Hd. Further, as shown in Fig. 2, the direction orthogonal to the bridge axis direction L and the height direction H is defined as the bridge axis perpendicular direction W.

[0035] The present invention relates to a method for bridging a digit member 1 between a gantry 100 and a pier 110 and a hand-drawing machine 10 to which a height adjustment device 20 is attached and used in the method, and the method for feeding the digit member 1 connected to the hand-drawing machine 10 on the tip side Lf and bridging the digit member 1 from the gantry 100 to the pier 110.

[0036] Specifically, as shown in Fig. 1, it is a feeding method for bridging a digit member 1 between a gantry 100 and a pier 110 arranged at a predetermined distance (span length) in the bridge axis direction L. In Fig. 1, in order to bridge the digit member 1 between the pier 110 and the gantry 120, a gantry 100 is provided on the tip side Lf of the gantry 120, and the gantry 100 and the pier 110 are configured to be bridged using a hand-drawing machine 10 described later, but they may also be configured to bridge the pier 110 and the gantry 120.

[0037] The structures of the pedestal 100, the pier 110, and the abutment 120 are conventional structures, and their descriptions are omitted. On the upper parts of the pedestal 100, the pier 110, and the abutment 120, in the bridge axis direction L, there are a slide support mechanism 130 that supports the girder member 1 and the hand extension machine 10 described later so as to be slidable in the bridge axis direction L, and other equipment (not shown) necessary for the sending method, such as a lowering device and a sending device.

[0038] In the sending method, the girder member 1 with the hand extension machine 10 connected to the tip side Lf is sent from the pedestal 100 toward the pier 110 and is configured to span between the pedestal 100 and the pier 110. The girder member 1 is a girder member having a predetermined length that forms a steel bridge provided with a plurality of main girders (not shown) at a predetermined interval in the direction perpendicular to the bridge axis W. However, it may be a girder member of a box girder bridge provided with a so-called box girder, or a girder member of a concrete bridge or a composite bridge.

[0039] The hand extension machine 10 is connected to the end of the tip side Lf of the girder member 1 configured as described above via a connecting portion 2. The connecting portion 2 has a conventional structure, and its structure description is omitted. The hand extension machine 10 includes a hand extension machine main body 11 connected to the girder member 1 via a connecting portion 2, and a height adjustment device 20 attached to the tip side Lf of the hand extension machine main body 11. The hand extension machine 10 is configured to have a length of about 70% of the distance in the bridge axis direction L between the pedestal 100 and the pier 110, that is, the span length. The ratio of the length of the hand extension machine 10 to the span length is not limited to about 70%, and may be appropriately set according to construction conditions and the like.

[0040] The hand extension machine main body 11 is composed of four girder-shaped steel materials 12 arranged at a predetermined interval in the direction perpendicular to the bridge axis W, and a width direction connecting body 13 that connects the girder-shaped steel materials 12 to each other in the direction perpendicular to the bridge axis W. In FIG. 2, four girder-shaped steel materials 12 constituting the hand extension machine main body 11 are provided, but the number of these is not limited to four. For example, it can be configured with an appropriate number according to the number of girders constituting the girder member 1.

[0041] The girder-shaped steel member 12 is formed of an I-beam formed with a length of about 70% of the span length between the gantry 100 and the pier 110 as described above, excluding the height adjustment device 20, and is arranged at a predetermined interval in the direction W perpendicular to the bridge axis.

[0042] In addition, the four girder-shaped steel members 12 are arranged corresponding to the interval between the main girders constituting the girder member 1, and the main girders constituting the girder member 1 and the girder-shaped steel members 12 of the hand-stretching machine body 11 will be arranged along the bridge axis direction L. Further, the girder-shaped steel member 12 is formed with a width approximately the same as that of the main girders constituting the girder member 1.

[0043] As described above, the width-direction connecting body 13 that connects the girder-shaped steel members 12 to each other in the direction W perpendicular to the bridge axis is arranged between the girder-shaped steel members 12 arranged at a predetermined interval in the direction W perpendicular to the bridge axis, and is composed of a horizontal member 131 arranged on the upper side Hu and the lower side Hd and a diagonal member 132 that diagonally connects the horizontal members 131 arranged on both sides in the height direction H to form a truss structure.

[0044] The height adjustment device 20 attached to the tip side Lf of the hand-stretching machine body 11 includes four height adjustment units 21 arranged at a predetermined interval in the direction W perpendicular to the bridge axis, and a width-direction connecting body 13 that connects the height adjustment units 21 to each other in the direction W perpendicular to the bridge axis. In FIG. 2, four height adjustment units 21 that constitute the height adjustment device 20 are provided, but the number of these is not limited to four, and for example, it can be configured with an appropriate number according to the number of girders constituting the girder member 1.

[0045] In addition, the four height adjustment units 21 are arranged corresponding to the interval in the direction W perpendicular to the bridge axis of the main girders constituting the girder member 1 and the girder-shaped steel members 12 constituting the hand-stretching machine body 11, and the main girders constituting the girder member 1, the girder-shaped steel members 12 constituting the hand-stretching machine body 11, and the height adjustment units 21 constituting the height adjustment device 20 will be arranged along the bridge axis direction L.

[0046] The height adjustment unit 21 is provided with a tip movable part 30 arranged on the tip side Lf, a mounting adapter 50 attached to the tip side Lf of the girder-shaped steel material 12 that constitutes the hand stretching machine main body 11, and a lifting connection mechanism part 40 arranged between the tip movable part 30 and the mounting adapter 50.

[0047] The tip movable part 30 is formed in an approximately trapezoidal shape when viewed from the front, having a tip side inclined surface 31 on the tip side Lf that protrudes toward the tip side Lf toward the lower side Hd, and a base side inclined surface 32 on the base side Lb that protrudes toward the base side Lb toward the upper side Hu, and is configured with the same height and width as the girder-shaped steel material 12. The base-side slope 32 is formed to form an angle of approximately 60 degrees with respect to the horizontal plane, and the tip-side slope 31 is formed to have an inclination angle steeper than that of the base-side slope 32. Note that the angle of the base-side slope 32 with respect to the horizontal plane is not limited to approximately 60 degrees and may be set to any appropriate angle, but an angle of approximately 60 degrees is preferable.

[0048] In this manner, the tip movable part 30, which is formed in a generally trapezoidal shape when viewed from the front, has a curved part 33 on the tip side Lf of the bottom part thereof, which curves towards the upper side Hu. In addition, at the end of the base end side Lb of the tip movable part 30, pivot support parts 34 (34a, 34b) are provided on both sides in the height direction H which protrude toward the base end side Lb and pivotally support the tip side Lf of the link part 41 of the lifting connection mechanism part 40 described later.

[0049] The pivot support parts 34 provided on both sides in the height direction H are formed to have equal horizontal protrusion amounts from the base-side inclined surface 32 protruding toward the base end side Lb toward the upper side Hu. Therefore, the upper pivot support part 34a on the upper side Hu protrudes toward the base end side Lb more than the lower pivot support part 34b on the lower side Hd so as to form an angle of approximately 60 degrees with respect to the horizontal plane.

[0050] In addition, a connecting portion 35 that pivotally connects an end portion of the upper Hu of a tip telescopic jack 42a (described later) to be able to pivot is provided on the bottom surface of the upper pivot support portion 34a of the upper Hu of the tip movable portion 30 so as to protrude toward the lower side Hd. The angle of the upper pivot support portion 34a with respect to the horizontal plane is not limited to approximately 60 degrees and may be set to any appropriate angle, but an angle of approximately 60 degrees is preferable.

[0051] The mounting adapter 50 is an adapter for attaching the height adjustment unit 21 that constitutes the height adjustment device 20 to the beam-shaped steel material 12 that constitutes the hand-stretching machine main body 11, and is formed in a roughly trapezoidal shape when viewed from the front, with the base end side Lb aligned in the vertical direction and the tip side Lf having a tip side inclined surface 51 that protrudes toward the lower side Hd, and is configured with the same height and width as the tip movable part 30 and the beam-shaped steel material 12.

[0052] The tip side inclined surface 51 is formed to form an angle of approximately 60 degrees with respect to the horizontal plane, similar to the base side inclined surface 32 of the tip movable part 30. In addition, at the end of the tip side Lf of the mounting adapter 50, pivot support parts 52 (52a, 52b) that protrude to the tip side Lf and pivotally support the base end side Lb of the link part 41 of the lifting connecting mechanism part 40 described later are provided on both sides in the height direction H. On the upper surface of the lower pivot support part 52b of the lower side Hd of the mounting adapter 50, a connecting part 53 that pivotally connects the end of the lower side Hd of the base side telescopic jack 42b described later is provided so as to protrude to the upper side Hu. The angle of the front inclined surface 51 with respect to the horizontal plane is not limited to approximately 60 degrees and may be set to any appropriate angle, but an angle of approximately 60 degrees is preferable.

[0053] The pivot support parts 52 provided on both sides in the height direction H are formed to have equal horizontal protrusion amounts from the leading inclined surface 51 protruding toward the leading end side Lf toward the lower side Hd. Therefore, the lower pivot support part 52b on the lower side Hd protrudes toward the leading end side Lf at an angle of approximately 60 degrees with respect to the horizontal plane more than the upper pivot support part 52a on the upper side Hu.

[0054] In addition, the upper pivot support portion 52a of the upper Hu of the mounting adapter 50 and the upper pivot support portion 34a of the upper Hu of the tip movable part 30 are positioned at the same height, and the pivot support portion 34 and the pivot support portion 52 are positioned in opposing directions in the bridge axis direction L. Note that the angle of the lower pivotal support portion 52b with respect to the horizontal plane is not limited to approximately 60 degrees and may be set at an appropriate angle, but an angle of about 60 degrees is preferable.

[0055] The elevating connection mechanism portion 40 is an elevating connection mechanism that connects the tip movable portion 30 so as to be elevable in a posture substantially parallel to the mounting adapter 50, and includes link portions 41 (41a, 41b) provided on both sides in the height direction H, a telescopic jack 42 that drives the elevating connection mechanism portion 40, and an intermediate connection body 43 that connects the vicinity of the middle of the link portions 41 on both sides in the height direction H in the height direction H.

[0056] The link portion 41 has a substantially plate shape having the same width and a predetermined thickness as the tip movable portion 30 and the mounting adapter 50, and is disposed between the pivotal support portion 34 of the tip movable portion 30 and the pivotal support portion 52 of the mounting adapter 50.

[0057] Specifically, the upper link portion 41a on the upper stage side of the upper side Hu is disposed between the upper pivotal support portion 34a of the tip movable portion 30 and the upper pivotal support portion 52a of the mounting adapter 50, and the lower link portion 41b on the lower stage side of the lower side Hd is disposed between the lower pivotal support portion 34b of the tip movable portion 30 and the lower pivotal support portion 52b of the mounting adapter 50. Therefore, the upper link portion 41a and the lower link portion 41b disposed at intervals in the height direction H are such that the lower link portion 41b is disposed on the tip side Lf with respect to the upper link portion 41a.

[0058] Note that both ends of the link portion 41 in the bridge axis direction L are provided with pivotal connection portions 411 that are pivotally supported by the pivotal support portion 34 of the tip movable portion 30 and the pivotal support portion 52 of the mounting adapter 50. Also, in the vicinity of the center of the link portion 41 in the bridge axis direction L, jack connection portions 412 (412a, 412b) that pivotally connect the end portions of a telescopic jack 42 described later are provided so as to protrude in the height direction H.

[0059] Specifically, near the center in the bridge axis direction L on the bottom surface side of the upper link portion 41a of the upper Hu, a jack connection portion 412a for pivotally connecting the end of the upper Hu of the base side telescopic jack 42b described later is provided so as to protrude toward the lower Hd. Near the center in the bridge axis direction L on the upper surface side of the lower link portion 41b of the lower Hd, a jack connection portion 412b for pivotally connecting the end of the lower Hd of the tip side telescopic jack 42a described later is provided so as to protrude toward the upper Hu. Therefore, the jack connection portion 412b is arranged on the tip side Lf with respect to the jack connection portion 412a.

[0060] The telescopic jack 42 that drives the lifting connection mechanism portion 40 connects the connection portions (35, 53, 412) to each other in a telescopic manner in a posture inclined toward the upper Hu and the tip side Lf, and two are arranged on the tip side Lf.

[0061] Specifically, the tip side telescopic jack 42a arranged on the tip side Lf telescopically connects the connection portion 35 provided on the tip movable portion 30 and the jack connection portion 412b provided on the lower link portion 41b. The base side telescopic jack 42b arranged on the base end side Lb telescopically connects the jack connection portion 412a provided on the upper link portion 41a and the connection portion 53 provided on the mounting adapter 50.

[0062] The tip side telescopic jack 42a that telescopically connects the connection portion 35 and the jack connection portion 412b and the base side telescopic jack 42b that telescopically connects the jack connection portion 412a and the connection portion 53 are arranged at the same inclination angle inclined toward the upper Hu and the tip side Lf. The tip side telescopic jack 42a and the base side telescopic jack 42b are inclined toward the upper Hu and the tip side Lf so as to form an angle of approximately 60 degrees with respect to the horizontal plane.

[0063] The intermediate connecting body 43 is a member that connects the vicinity of the middle of the link portions 41 on both sides in the height direction H in the height direction H, and is rotatably connected to the link portions 41. The intermediate connecting body 43 is provided on both sides in the direction W perpendicular to the bridge axis in the lifting connection mechanism portion 40.

[0064] The intermediate connecting body 43, which is rotatably connected near the middle between the upper link portion 41a and the lower link portion 41b arranged at intervals in the height direction H, is inclined upward Hu and toward the base end side Lb so as to form an angle of 60 degrees with respect to the horizontal plane because the lower link portion 41b is arranged on the tip end side Lf with respect to the upper link portion 41a.

[0065] Therefore, in the height adjustment unit 21 provided with the lifting connection mechanism portion 40, a truss structure can be configured by the base side slope 32 of the tip movable portion 30, the link portions 41(41a, 41b) of the lifting connection mechanism portion 40, the telescopic jacks 42(42a, 42b) and the intermediate connecting body 43, and the tip side slope 51 of the mounting adapter 50. Note that the angles of the tip side telescopic jack 42a and the base side telescopic jack 42b with respect to the horizontal plane are not limited to approximately 60 degrees and may be set at appropriate angles, but an angle of about 60 degrees is preferable.

[0066] In other words, the tip side telescopic jack 42a is provided on the connecting portion 35 provided on the tip movable portion 30 along the short diagonal line in the parallelogram formed by the base side slope 32 of the tip movable portion 30, the portion of the tip end side Lf of the link portions 41(41a, 41b) of the lifting connection mechanism portion 40, and the intermediate connecting body 43, that is, along the diagonal connecting the base end side Lb and the lower side Hd and the tip end side Lf and the upper side Hu, and is telescopically connected to the jack connecting portion 412b provided on the lower link portion 41b.

[0067] Similarly, the base side telescopic jack 42b is provided on the short diagonal line in the parallelogram formed by the intermediate connecting body 43 of the lifting connection mechanism portion 40, the portion of the base end side Lb of the link portions 41(41a, 41b), and the tip side slope 51 of the mounting adapter 50, that is, along the diagonal connecting the base end side Lb and the lower side Hd and the tip end side Lf and the upper side Hu, and is telescopically connected to the jack connecting portion 412a provided on the upper link portion 41a and the connecting portion 53 provided on the mounting adapter 50.

[0068] The elevating connection mechanism section 40 configured in this manner can form a so-called parallel link mechanism in which the link sections 41a and 41b arranged at intervals in the height direction H are inclined while maintaining a parallel state as the telescopic jack 42 expands and contracts.

[0069] The elevating connection mechanism section 40 that forms such a parallel link mechanism is configured such that when the telescopic jack 42 that telescopically connects the connecting sections (35, 53, 412) expands and contracts in a posture inclined toward the upper side Hu and the tip side Lf, the base end side Lb and the tip side Lf of the elevating connection mechanism section 40 move relative to each other in the height direction H.

[0070] Specifically, when the telescopic jack 42 extends, the height adjustment unit 21 causes the diagonal distance in the direction connecting the base end side Lb and the lower side Hd and the tip side Lf and the upper side Hu in each parallelogram shape to extend and deform. Along with this deformation, the tip side Lf of the link section 41 moves to the upper side Hu and slightly toward the base end side Lb, causing it to incline. That is, when the telescopic jack 42 of the elevating connection mechanism section 40 extends, the tip side Lf moves to the upper side Hu. Conversely, when the extended telescopic jack 42 contracts, the diagonal distance in the direction connecting the base end side Lb and the lower side Hd and the tip side Lf and the upper side Hu in each parallelogram shape shortens, and the tip side Lf of the link section 41 moves to the lower side Hd and slightly toward the tip side Lf, eliminating the inclination. When the telescopic jack 42 of the elevating connection mechanism section 40 extends, the tip side Lf moves to the lower side Hd.

[0071] Therefore, the height adjustment unit 21 composed of the tip movable section 30, the elevating connection mechanism section 40, and the mounting adapter 50 can be deformed, by expanding and contracting the telescopic jack 42 of the elevating connection mechanism section 40, between the normal state shown in Fig. 5(a) where the tip movable section 30 and the mounting adapter 50 are aligned in the bridge axis direction L, and the parallel deformed state shown in Fig. 5(b) where the tip movable section 30 moves to the upper side Hu while maintaining its posture with respect to the mounting adapter 50.

[0072] By connecting the tip movable parts 30 of the height adjustment unit 21 configured as described above with the width direction connecting body 13, the height adjustment device 20 is configured, and the stretching machine 10 can be configured by attaching it to the tip side Lf of the girder-shaped steel member 12 arranged at a predetermined interval in the direction W perpendicular to the bridge axis. In addition to the width direction connecting body 13 that connects the tip movable parts 30 in the direction W perpendicular to the bridge axis, the attachment adapters 50 may be further connected in the direction W perpendicular to the bridge axis by the width direction connecting body 13.

[0073] Subsequently, the girder member 1 connected to the stretching machine 10 configured as described above is sent out from the gantry 100 toward the pier 110, and the sending-out method for bridging the gantry 100 and the pier 110 will be described with reference to FIG. 4. In the following description, for example, descriptions of general steps in the sending-out method, such as the raising of the girder member 1 before sending out and the lowering of the girder member 1 when the sending out is completed, are omitted.

[0074] First, from the state shown in FIG. 1(a), the stretching machine 10 is sent out together with the girder member 1 until the height adjustment device 20 arranged on the tip side Lf of the stretching machine 10 approaches the pier 110 (proximity sending-out step: step s1). Then, the stretching machine 10 with the height adjustment device 20 attached to the tip side Lf has a longer overhanging length from the gantry 100, and as shown in FIGS. 5(a) and 6(a), it deflects due to its own weight, and the height adjustment device 20 is in a state of dropping below the lower side Hd of the slide support machine 130 above the pier 110.

[0075] In this state, since the height adjustment device 20 cannot be supported by the slide support machine 130 of the pier 110 even if the girder member 1 is further sent out, as shown in FIG. 6(b), in the height adjustment device 20, the tip movable part 30 is moved upward Hu with respect to the attachment adapter 50 (tip movable part upward movement step: step s2).

[0076] Specifically, by extending the telescopic jack 42 in the lifting and connecting mechanism part 40, the tip movable part 30 is moved upward to Hu with respect to the mounting adapter 50 while maintaining the posture, and the lifting and connecting mechanism part 40 is brought into a parallel deformed state. At this time, the telescopic jack 42 is extended so that the bottom surface of the tip movable part 30 is located slightly above Hu from the upper surface of the slide support 130 of the pier 110.

[0077] As described above, the stretching machine 10 and the girder member 1, where the bottom surface of the tip movable part 30 in the height adjusting device 20 is located slightly above Hu from the upper surface of the slide support 130 of the pier 110, are pushed further to the tip side Lf to the position where the bottom surface of the tip movable part 30 in the height adjusting device 20 is supported by the slide support 130 of the pier 110, as shown in Fig. 7(a) (tip movable part support process: step s3).

[0078] Note that in this state, the tip movable part 30 of the height adjusting device 20 in the stretching machine 10 is supported by the slide support 130 of the pier 110, and the stretching machine body 11 of the stretching machine 10 is supported by the slide support 130 of the gantry 100, that is, it changes from the previous cantilever state to a both-side support state.

[0079] However, although the tip movable part 30 of the height adjusting device 20 is supported by the slide support 130 of the pier 110, the lifting and connecting mechanism part 40, the mounting adapter 50 of the height adjusting device 20, and the tip side Lf of the stretching machine body 11 are located below Hd from the upper part of the slide support 130 of the pier 110. Therefore, as shown in Fig. 7(b), the lifting and connecting mechanism part 40 is used to move the lifting and connecting mechanism part 40, the mounting adapter 50 of the height adjusting device 20, and the tip side Lf of the stretching machine body 11 upward to Hu (height adjusting process: step s4).

[0080] Specifically, by shortening the extended telescopic jack 42 of the lifting and connecting mechanism part 40 that has become in a parallel deformation state due to the extension of the telescopic jack 42, the lifting and connecting mechanism part 40 is returned to its normal state. At this time, the tip movable part 30 is in a state supported by the slide support mechanism 130 of the pier 110, that is, the movement of the tip movable part 30 downward to Hd is restricted by the slide support mechanism 130. Therefore, when the lifting and connecting mechanism part 40 is returned to its normal state, the mounting adapter 50 moves upward to Hu with respect to the tip movable part 30 whose downward movement to Hd is restricted. Along with the upward movement of the mounting adapter 50 to Hu with respect to the tip movable part 30, the noodle-extending machine body 11 also moves upward to Hu, and the lifting and connecting mechanism part 40, the mounting adapter 50, and the noodle-extending machine body 11 are aligned in a straight line along the bridge axis direction L with the tip movable part 30 supported by the slide support mechanism 130 of the pier 110. Also, at this time, along with the lifting of the mounting adapter 50 and the noodle-extending machine body 11 by the lifting and connecting mechanism part 40, the tip movable part 30 slides toward the tip side Lf while being supported by the slide support mechanism 130.

[0081] Then, by further pushing out the noodle-extending machine 10 in which the height adjustment device 20 in its normal state and the noodle-extending machine body 11 are aligned in a straight line, together with the girder member 1, toward the tip side Lf, the noodle-extending machine 10 and the girder member 1 can slide on the slide support mechanism 130 of the pier 110 and the gantry 100 and be bridged between the pier 110 and the gantry 100 as shown in Fig. 1(b) (slide feeding process: step s5). In addition, if there is a further pier on the tip side Lf of the pier 110, the pier 110 in the above description is regarded as the gantry 100 in the above description, and the pier on the further tip side Lf is regarded as the pier 110 in the above description, and the above process is repeated, and the girder member 1 provided with the noodle-extending machine 10 can be bridged.

[0082] As described above, in the feeding method of feeding out the girder member 1 to which the hand-extending machine 10 is connected to the tip side Lf in the bridge axis direction L and bridging the girder member 1 from the gantry 100 to the pier 110, the hand-extending machine 10 includes a mounting adapter 50 attached to the hand-extending machine body 11 disposed on the base end side Lb, a tip movable part 30 disposed on the tip side Lf, and a lifting connection mechanism part 40 disposed between the mounting adapter 50 and the tip movable part 30. The lifting connection mechanism part 40 is configured to connect the tip movable part 30 so as to be able to move up and down in a posture substantially parallel to the mounting adapter 50. The tip movable part 30 lifted with respect to the mounting adapter 50 by the lifting connection mechanism part 40 is supported by a slide support machine 130 provided on the upper part of the pier 110 and capable of supporting the girder member 1 in a feedable manner, and the girder member 1 is fed out so that the tip movable part 30 is supported by the slide support machine 130, and a tip movable part support step (step s3) of supporting the tip movable part 30 by the slide support machine 130; a height adjustment step (step s4) of operating the lifting connection mechanism part 40 so that the tip movable part 30 lifted with respect to the mounting adapter 50 relatively descends in a state where the tip movable part 30 is supported by the slide support machine 130, thereby lifting the mounting adapter 50 to the same height with respect to the tip movable part 30 supported by the slide support machine 130; and a slide feeding step (step s5) of feeding out the hand-extending machine 10 with the tip movable part 30 supported by the slide support machine 130 by sliding the slide support machine 130 are performed.

[0083] Also, as described above, the hand-extending machine 10 connected to the tip side Lf in the bridge axis direction L of the girder member 1 bridging from the gantry 100 to the pier 110 includes a mounting adapter 50 attached to the hand-extending machine body 11 disposed on the base end side Lb, a tip movable part 30 disposed on the tip side Lf, and a lifting connection mechanism part 40 disposed between the mounting adapter 50 and the tip movable part 30. The lifting connection mechanism part 40 is configured to connect the tip movable part 30 so as to be able to move up and down in a posture substantially parallel to the mounting adapter 50.

[0084] Therefore, even when the hand-extending machine 10 drops due to feeding out, the girder member 1 can be safely installed between the gantry 100 and the pier 110 without applying an unnecessary external force that causes it to fall on the pier 110. Specifically, the stretching machine 10 is provided with a mounting adapter 50 disposed on the base end side Lb, a tip movable part 30 disposed on the tip end side Lf, and a lifting connection mechanism part 40 disposed between the mounting adapter 50 and the tip movable part 30. And since the lifting connection mechanism part 40 is configured to connect the tip movable part 30 so as to be able to move up and down in a posture substantially parallel to the mounting adapter 50, the tip movable part 30 can be relatively moved up and down while maintaining a posture substantially parallel to the mounting adapter 50.

[0085] Also, a tip movable part support step (step s3) is performed in which the slide support machine 130 provided on the upper part of the pier 110 and supporting the girder member 1 so as to be able to feed it out supports the tip movable part 30 lifted with respect to the mounting adapter 50 attached to the stretching machine main body 11 by the lifting connection mechanism part 40 by feeding out the girder member 1 so that the tip movable part 30 is supported by the slide support machine 130. Thus, even if the stretching machine 10 descends due to feeding out, the tip movable part 30 can be supported by the slide support machine 130 of the pier 110.

[0086] Then, in the height adjustment step (step s4), with the tip movable part 30 supported by the slide support machine 130, the lifting connection mechanism part 40 is operated so that the tip movable part 30 lifted with respect to the mounting adapter 50 relatively descends. Thus, the mounting adapter 50 can be lifted to the same height with respect to the tip movable part 30 supported by the slide support machine 130, and the stretching machine 10 lowered from the slide support machine 130 can be lifted to a predetermined position.

[0087] At this time, when the lifting connection mechanism part 40 is operated so that the tip movable part 30 lifted with respect to the mounting adapter 50 relatively descends with the tip movable part 30 supported by the slide support machine 130, since the descent of the tip movable part 30 is restricted by the slide support machine 130, the mounting adapter 50 can be moved up and down in a state substantially parallel to the tip movable part 30. Therefore, the stretching machine 10 can be lifted to a predetermined position without applying an unnecessary external force that causes it to fall to the pier 110 provided with the slide support machine 130.

[0088] Then, by sliding the slide support mechanism 130 to further feed out the noodle-extending machine 10 with the tip movable part 30 supported by the slide support mechanism 130, the girder member 1 can be safely installed between the gantry 100 and the pier 110.

[0089] Also, before the tip movable part support step (step s3), a near feeding step (step s1) of feeding out the girder member 1 so that the tip movable part 30 of the noodle-extending machine 10 approaches the pier 110, and a tip movable part raising step (step s2) of raising the tip movable part 30 sent out to the vicinity of the pier 110 by the lifting connection mechanism part 40 with respect to the mounting adapter 50 are performed.

[0090] Therefore, in the feeding step, the tip movable part 30 of the noodle-extending machine 10 that has been fed out to the vicinity of the pier 110 and has dropped due to its own weight is raised to a height at which the tip movable part 30 can be supported by the slide support mechanism 130 in the tip movable part raising step (step s2), and in the subsequent tip movable part support step (step s3), the tip movable part 30 can be supported by the slide support mechanism 130 of the pier 110.

[0091] Further, the lifting connection mechanism part 40 is a parallel link mechanism provided with two link parts 41 that rotatably connect the tip side Lf of the mounting adapter 50 and the base end side Lb of the tip movable part 30, and a telescopic jack 42 that operates the parallel link mechanism is provided. By driving the telescopic jack 42, the mounting adapter 50 and the tip movable part 30 move relative to each other in the height direction H. Therefore, the mounting adapter 50 and the tip movable part 30 can be relatively lifted and lowered in a substantially parallel state with a simple structure.

[0092] Further, the two link portions 41 include an upper link portion 41a that rotatably connects the upper part of the distal end side Lf of the mounting adapter 50 and the upper part of the proximal end side Lb of the distal end movable portion 30, and a lower link portion 41b that rotatably connects the lower part of the distal end side Lf of the mounting adapter 50 and the lower part of the proximal end side Lb of the distal end movable portion 30. The telescopic jack 42 connects the connection portion 35 near the distal end side Lf of the upper link portion 41a and the connection portion 53 near the proximal end side Lb of the lower link portion 41b so as to be able to approach and separate from each other. By driving the telescopic jack 42, the mounting adapter 50 and the distal end movable portion 30 move relative to each other in the height direction H.

[0093] Therefore, by driving the telescopic jack 42 to approach and separate the vicinity of the distal end side Lf of the upper link portion 41a and the vicinity of the proximal end side Lb of the lower link portion 41b, the mounting adapter 50 and the distal end movable portion 30 can be relatively raised and lowered in a substantially parallel state.

[0094] In addition, an intermediate connecting body 43 is provided to rotatably connect the vicinity of the middle of the upper link portion 41a and the vicinity of the middle of the lower link portion 41b. The telescopic jack 42 includes a front telescopic jack 42a that connects the connection portion 35 near the distal end side Lf of the upper link portion 41a and the jack connection portion 412b near the lower connection portion of the intermediate connecting body 43, and a base telescopic jack 42b that connects the connection portion 53 near the proximal end side Lb of the lower link portion 41b and the jack connection portion 412a near the upper connection portion of the intermediate connecting body 43. By driving the front telescopic jack 42a and the base telescopic jack 42b in synchronization, the mounting adapter 50 and the distal end movable portion 30 move relative to each other in the height direction H. Therefore, by driving the two telescopic jacks 42a and 42b, the mounting adapter 50 and the distal end movable portion 30 can be relatively raised and lowered in a substantially parallel state efficiently.

[0095] Further, when the elevating link mechanism 40 is operated by the telescopic jack 42 so that the tip movable part 30 that has been raised relative to the mounting adapter 50 descends relative to the slide support 130 while the tip movable part 30 is supported by the slide support 130, since the descent of the tip movable part 30 is restricted by the slide support 130, the mounting adapter 50 rises, but the mounting adapter 50 can be moved up and down in a state substantially parallel to the tip movable part 30.

[0096] At this time, as the mounting adapter 50 moves up and down, the tip movable part 30 is fed out to the tip side Lf while being supported by the slide support 130. Therefore, the stretching machine 10 can be raised to a predetermined position and fed out to the tip side Lf without applying an unnecessary external force that causes the pier 110 provided with the slide support 130 to topple.

[0097] Also, in the mounting adapter 50, the lower part where the lower link part 41b is connected is more on the tip side Lf than the upper part of the tip inclined surface 51, and the upper link part 41a is connected, and in the tip movable part 30, the upper part where the upper link part 41a is connected is more on the base end side Lb than the lower part of the base inclined surface 32 where the lower link part 41b is connected.

[0098] Therefore, in the relative elevation and descent of the mounting adapter 50 and the tip movable part 30 by the elevating link mechanism 40, a state of being accurately parallel can be maintained. Further, in a state where the tip movable part 30 is raised relative to the mounting adapter 50, the distance between the upper link part 41a and the lower link part 41b is narrowed, and it is possible to prevent the upper link part 41a or the lower link part 41b from interfering with the telescopic jack 42 and the rigidity of the elevating link mechanism 40 from decreasing.

[0099] As described above, in the correspondence between the configuration of the present invention and the above-described embodiment, the feeding direction of the present invention corresponds to the bridge axis direction L. Similarly hereinafter, The tip side corresponds to the tip side Lf. The stretching machine corresponds to the stretching machine 10. The girder member corresponds to the girder member 1. The first support part corresponds to the pedestal 100, The second support part corresponds to the pier 110, The base part corresponds to the mounting adapter 50 attached to the noodle-extending machine body 11, The tip movable part corresponds to the tip movable part 30, The middle part corresponds to the elevating connection mechanism part 40, The girder member side corresponds to the base end side Lb, The elevating connection mechanism corresponds to the elevating connection mechanism part 40, The feeding support corresponds to the slide support 130, The tip movable part support process corresponds to the tip movable part support process (step s3), The height adjustment process corresponds to the height adjustment process (step s4), The slide feeding process corresponds to the slide feeding process (step s5), The tip movable part ascending process corresponds to the tip movable part ascending process (step s2), The near-end feeding process corresponds to the near-end feeding process (step s1), The link part corresponds to the link part 41, The drive part corresponds to the telescopic jack 42, The base end side corresponds to the base end side Lb, At least one of ascending and descending corresponds to movement in the height direction H, The upper-stage link corresponds to the upper-stage link part 41a, The lower-stage link corresponds to the lower-stage link part 41b, The drive connection part corresponds to the telescopic jack 42, The intermediate connection body corresponds to the intermediate connection body 43, The gap corresponds to the gap s, but is not limited to the above embodiment.

[0100] For example, in the above description, the height adjustment device 20 was connected to the tip side Lf of the noodle-extending machine body 11 to form the noodle-extending machine 10. However, the tip structure of the noodle-extending machine body 11 may be the structure of the mounting adapter 50, and the height adjustment device 20 (height adjustment unit 21) may be constituted by the tip part of the noodle-extending machine body 11, the tip movable part 30, and the elevating connection mechanism part 40. That is, the noodle-extending machine body 11 may be configured to perform the function of the height adjustment device 20.

[0101] Also, in the above description, the elevating connection mechanism unit 40 is configured to operate with the telescopic jack 42 disposed inside the parallelogram formed by the link portion 41, the base-side inclined surface 32, the intermediate connecting body 43, and the tip-side inclined surface 51. However, if the diagonal distance of the parallelogram can be expanded and contracted, for example, the telescopic jack 42 may be disposed above the upper-stage link portion 41a, and a wire or steel bar disposed along the diagonal line of the parallelogram and fixed to the vertex on the far side may be pushed and pulled by the telescopic jack 42 or a traction device disposed above the upper-stage link portion 41a to operate the elevating connection mechanism unit 40.

[0102] Also, in the height adjustment unit 21, the elevating connection mechanism unit 40 that constitutes the parallel link mechanism is used. However, if the tip movable portion 30 can be moved in the height direction H while maintaining the posture with respect to the mounting adapter 50, it may be configured by a lifter that can be raised and lowered in the height direction H with respect to the mounting adapter 50.

[0103] In the above description, the girder member 1 is configured to be sent out from the gantry 100 toward the pier 110. However, the girder member 1 may be erected in an appropriate combination such as between piers, between abutments, between a pier and an abutment, or between a gantry such as a bent and an abutment.

[0104] The above-described slide support machine 130 may have any appropriate structure as long as it can support the hand extension machine 10 and the girder member 1 so as to be sent out in a substantially horizontal direction by a rolling body that rotates about a substantially horizontal rotation axis orthogonal to the bridge axis direction L.

[0105] In the above description, after performing the near feeding and discharging process (step s1) of feeding the stringing member 1 so that the hand drawing machine 10 approaches the pier 110, the elevating connection mechanism unit 40 performs the tip movable part raising process (step s2) of raising the tip movable part 30 with respect to the mounting adapter 50, and then performs the tip movable part supporting process (step s3) to support the tip movable part 30 by the slide support machine 130 of the pier 110. On the other hand, first, the elevating connection mechanism unit 40 performs the tip movable part raising process of raising the tip movable part 30 with respect to the mounting adapter 50, and with the tip movable part 30 being in the raised state, the hand drawing machine 10 and the stringing member 1 may be fed out until the tip movable part 30 approaches the pier 110.

[0106] In this way, before the tip movable part supporting process (step s3), by performing the tip movable part raising process of raising the tip movable part 30 with the elevating connection mechanism unit 40 with respect to the mounting adapter 50 and the near feeding and discharging process of feeding out the stringing member 1 so that the hand drawing machine 10 with the tip movable part 30 being raised approaches the pier 110, in the subsequent tip movable part supporting process (step s3), the tip movable part 30 can be supported by the slide support machine 130 of the pier 110. Note that, in order to raise the tip movable part 30 with respect to the mounting adapter 50 in advance by the elevating connection mechanism unit 40, that is, to raise the tip movable part 30 with respect to the mounting adapter 50 in the vicinity of the gantry 100, in addition to the telescopic jack 42 of the elevating connection mechanism unit 40, a crane or the like can be used for raising.

Explanation of Reference Numerals

[0107] 1... Stringing member 10... Hand drawing machine 11... Hand drawing machine main body 30... Tip movable part 40... Elevating connection mechanism unit 41... Link part 41a... Upper stage side link part 41b... Lower stage side link part 42... Telescopic jack 43... Intermediate connection body 50... Mounting adapter 100... Gantry 110... Pier 130... Slide support machine H... Height direction L... Bridge axis direction Lb... Base end side Lf... Tip side Step s1... Near transfer process Step s2... Tip movable part ascending process Step s3... Tip movable part support process Step s4... Height adjustment process Step s5... Slide transfer process

Claims

1. In a feeding method of feeding a digit member with a stretching machine connected to the tip side in the feeding direction and bridging the digit member from a first support portion to a second support portion, the stretching machine is provided with a base portion disposed on the digit member side, a tip movable portion disposed on the tip side, and an intermediate portion disposed between the base portion and the tip movable portion, the intermediate portion is, an elevating connection mechanism that connects the tip movable portion to be elevable in a posture substantially parallel to the base portion, a tip movable portion supporting step of feeding the digit member so that the tip movable portion raised with respect to the base portion by the elevating connection mechanism is supported by a feeding support body provided on an upper portion of the second support portion and supporting the digit member so as to be feedable, and supporting the tip movable portion by the feeding support body; a height adjustment step of operating the elevating connection mechanism so that the tip movable portion raised with respect to the base portion relatively descends in a state where the tip movable portion is supported by the feeding support body, thereby raising the base portion to the same height as the tip movable portion supported by the feeding support body; and a slide feeding step of further feeding the stretching machine with the tip movable portion supported by the feeding support body by sliding the feeding support body. Feeding method.

2. Before the tip movable portion supporting step, a close feeding step of feeding the digit member so that the tip movable portion of the stretching machine approaches the second support portion; and a tip movable portion raising step of raising the tip movable portion fed to the vicinity of the second support portion with respect to the base portion by the elevating connection mechanism. The feeding method according to Claim 1.

3. Before the tip movable portion supporting step, a tip movable portion raising step of raising the tip movable portion with respect to the base portion by the elevating connection mechanism; and a close feeding step of feeding the digit member so that the stretching machine with the tip movable portion raised approaches the second support portion. The feeding method according to Claim 1.

4. The elevating connection mechanism is a parallel link mechanism provided with two link portions that rotatably connect the tip side of the base portion and the base end side of the tip movable portion, and a drive portion for operating the parallel link mechanism is provided, and by driving the drive portion, the base portion and the tip movable portion are at least one of relatively rising and falling. The feeding method according to Claim 2 or Claim 3.

5. One of the two link portions is an upper-stage link that rotatably connects the upper portion on the distal end side of the base portion and the upper portion on the proximal end side of the distal movable portion. The other of the two link portions is a lower-stage link that rotatably connects the lower portion on the distal end side of the base portion and the lower portion on the proximal end side of the distal movable portion. The drive unit is configured by a drive connection portion that connects at least one of proximity and separation between the vicinity of one of the distal end side and the proximal end side of the upper-stage link and the vicinity of the other of the distal end side and the proximal end side of the lower-stage link. By driving the drive connection portion, the base portion and the distal movable portion are at least one of relatively rising and falling. The feeding method according to claim 4.

6. An intermediate connecting body is provided that rotatably connects the vicinity of the middle of the upper-stage link and the vicinity of the middle of the lower-stage link. The drive connection portion includes a first drive connection portion that connects the vicinity of one of the distal end side and the proximal end side of the upper-stage link and the vicinity of the lower connection portion on the lower side of the intermediate connecting body, and a second drive connection portion that connects the vicinity of the other of the distal end side and the proximal end side of the lower-stage link and the vicinity of the upper connection portion on the upper side of the intermediate connecting body. By driving the first drive connection portion and the second drive connection portion in synchronization, the base portion and the distal movable portion are at least one of relatively rising and falling. The feeding method according to claim 5.

7. In the base portion, the lower portion to which the lower-stage link is connected protrudes toward the distal end side from the upper portion to which the upper-stage link is connected. In the distal movable portion, the upper portion to which the upper-stage link is connected protrudes toward the proximal end side from the lower portion to which the lower-stage link is connected. The feeding method according to claim 6.

8. A hand-rolling machine connected to the distal end side in the feeding direction of a beam member bridging from a first support portion to a second support portion, wherein a base portion disposed on the beam member side, a distal movable portion disposed on the distal end side, and an intermediate portion disposed between the base portion and the distal movable portion are provided. The intermediate portion is a lifting connection mechanism that connects the distal movable portion so as to be able to move up and down in a posture substantially parallel to the base portion. Hand-rolling machine.

9. The lifting connection mechanism is a parallel link mechanism provided with two link portions that rotatably connect the distal end side of the base portion and the proximal end side of the distal movable portion, and a drive unit for operating the parallel link mechanism is provided. The hand-rolling machine according to claim 8.

10. One of the two link portions is an upper-stage link that rotatably connects the upper portion on the distal end side of the base portion and the upper portion on the proximal end side of the distal end movable portion. The other of the two link portions is a lower-stage link that rotatably connects the lower portion on the distal end side of the base portion and the lower portion on the proximal end side of the distal end movable portion. The drive unit is a drive connection portion that connects at least one of proximity and separation between the vicinity of one of the distal end side and the proximal end side of the upper-stage link and the vicinity of the other of the distal end side and the proximal end side of the lower-stage link. The hand-stretching machine according to claim 9.

11. An intermediate connecting body is provided that rotatably connects the vicinity of the middle of the upper-stage link and the vicinity of the middle of the lower-stage link. The drive connection portion includes a first drive connection portion that connects the vicinity of one of the distal end side and the proximal end side of the upper-stage link and the vicinity of the connection portion on the lower side of the intermediate connecting body, and a second drive connection portion that connects the vicinity of the other of the distal end side and the proximal end side of the lower-stage link and the vicinity of the connection portion on the upper side of the intermediate connecting body. The hand-stretching machine according to claim 10.

12. In the base portion, the lower portion to which the lower-stage link is connected protrudes toward the distal end side from the upper portion to which the upper-stage link is connected. In the distal end movable portion, the upper portion to which the upper-stage link is connected protrudes toward the proximal end side from the lower portion to which the lower-stage link is connected. The hand-stretching machine according to any one of claims 8 to 11. ​

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