JP5784663B2 - Telescopic device and installation jig - Google Patents

Description

  The present invention relates to a telescopic device provided on a bridge and a jig for installation thereof.

  The bridge is provided with an expansion / contraction device to absorb the expansion / contraction of the bridge due to a temperature change and the deformation of the bridge due to the vibration caused by the earthquake or the passage of the vehicle. As a conventional expansion / contraction apparatus, a pair of comb-shaped joints that can be applied to relatively large expansion / contraction, deformation, or the like, so-called finger joints are frequently used (see, for example, Patent Documents 1 to 3). In the finger joint, a pair of comb-shaped joint portions are arranged to face each other across a gap between bridges.

7 and 8 are explanatory views showing the installation procedure of the conventional steel expansion and contraction device. FIG. 7 is a partially enlarged plan view, and FIG. 8 is a cross-sectional view taken along the line CC in FIG. For example, installation of a general steel expansion and contraction device is performed according to the following procedure.
(1) The expansion / contraction device clearance adjustment plates 101a and 101b are fixed to the surface of the expansion / contraction device 100 by welding.
(2) The suspension fitting 102 for lifting the expansion device is welded and fixed to the surface of the expansion device 100.
(3) Remove the expansion device gap adjustment plates 101a and 101b and the suspension fittings 102 from the surface of the expansion device 100 after installation on the site, and repair the removal marks.

JP-A-7-268815 Japanese Patent Laid-Open No. 2005-9312 JP 2007-32057 A

  As described above, in the conventional steel expansion and contraction device, the expansion device clearance adjustment plates 101a and 101b and the jigs of the suspension fittings 102 are welded and fixed to the surface of the expansion device at the time of installation. Since the surface of the apparatus is damaged, it is necessary to perform repairs, which causes an increase in cost.

  Therefore, an object of the present invention is to provide a telescopic device that can eliminate the need for repair of the telescopic device after installation when installing the telescopic device, and a jig for installing the telescopic device.

  The expansion and contraction device of the present invention is an expansion and contraction device having a comb-shaped joint portion arranged to face each other across a gap between bridges, and is provided with a gap adjustment portion and a gap adjustment portion for adjusting the gap between the joint portions. A nut on which a base portion of an installation jig having a base portion is fixed by a bolt is provided at a position where it does not protrude from the top surface of the joint portion of the reinforcing rib of the joint portion.

  Further, the installation jig of the present invention is an installation tool for an expansion / contraction device having a comb-shaped joint portion arranged to face each other with a gap between bridges, and the top surface of the joint portion of the reinforcing rib of the joint portion A base portion fixed by a bolt with respect to a nut provided at a position not projecting from the base, and a gap adjusting portion provided on the base portion for adjusting the gap between the joint portions.

  According to the expansion device and the installation jig of the present invention, the base portion of the installation jig is fixed by tightening a bolt against the nut provided on the reinforcing rib of the joint portion of the expansion device. The expansion and contraction device can be easily installed by adjusting the clearance of the joint portion by the clearance adjustment portion provided in the. And the installation jig | tool can be easily removed from an expansion-contraction apparatus by loosening a volt | bolt after installation. Moreover, since the nut with which the reinforcement rib of the joint part of the expansion-contraction apparatus was provided in the position which does not protrude from the top | upper surface of a joint part, it can be embedded in a bridge as it is.

  Here, the installation jig of the present invention preferably has a lifting part for lifting by a lifting device. As a result, when the telescopic device is installed, it can be lifted by the lifting device using the lifting portion of the installation jig. In addition, after installation, the bolt can be loosened as described above so that it can be easily removed from the telescopic device together with the installation jig.

(1) According to the present invention, there is no need to weld and fix the installation jig to the expansion / contraction device as in the prior art, and the nut provided on the reinforcing rib of the joint portion of the expansion / contraction device is processed by being embedded in the bridge as it is. Therefore, it is not necessary to repair the telescopic device after installation, and the telescopic device can be easily installed.

(2) Since the installation jig has a lifting portion for lifting by the lifting device, the lifting device is lifted by the lifting device using the lifting portion of the installation jig when the expansion device is installed. After installation, the extension device can be easily removed together with the installation jig, so that the extension device can be installed more easily.

It is a top view of the expansion-contraction apparatus equipped with the installation jig in the embodiment of the present invention. It is the A section enlarged view of FIG. It is BB sectional drawing of FIG. It is the A section enlarged view of FIG. 1 of the state which removed the jig | tool for installation. It is a figure which shows the detail of the 1st jig | tool for installation, Comprising: (a) is a top view, (b) is a front view, (c) is a right view. It is a figure which shows the detail of the 2nd jig | tool for installation, Comprising: (a) is a top view, (b) is a front view, (c) is a right view. It is a partial enlarged plan view which shows the installation procedure of the conventional steel expansion-contraction apparatus. It is CC sectional drawing of FIG.

  1 is a plan view of a telescopic device equipped with an installation jig according to an embodiment of the present invention, FIG. 2 is an enlarged view of a portion A in FIG. 1, FIG. 3 is a cross-sectional view along BB in FIG. 1 is an enlarged view of a portion A in FIG. 1 with the jig removed, FIG. 5 is a diagram showing details of the first installation jig, (a) is a plan view, (b) is a front view, c) is a right side view, FIG. 6 is a diagram showing details of the second installation jig, (a) is a plan view, (b) is a front view, and (c) is a right side view.

  In FIG. 1, a steel telescopic device 1 according to an embodiment of the present invention has a pair of comb-shaped joint portions 2a and 2b that are arranged to face each other across a gap between bridges. In the installation jig in the embodiment of the present invention, the gap between the joint portions 2a and 2b and the gap between the joint portions 2a and 2b and the first installation jig 3a and 3b that function as a suspension fitting are adjusted. There are second installation jigs 4a and 4b that only need to be adjusted.

  As shown in FIGS. 2 and 3, the installation jigs 3a and 3b and the installation brackets 4a and 4b are arranged on the top surfaces (upper surfaces) of the joint portions 2a and 2b so as to sandwich the joint portions 2a and 2b. And are fixed by bolts 7. As shown in FIGS. 3 and 4, the nut 6 into which the bolt 7 is screwed is welded to the reinforcing rib 5 of the joint portions 2a and 2b. The nut 6 is a position corresponding to a position where the bolt 7 is screwed when the installation jigs 3a, 3b, 4a, 4b are arranged on the telescopic device 1, and the top surface of the joint portions 2a, 2b. It is provided in the position which does not protrude from.

  As shown in FIG. 5, the installation jig 3b includes play adjustment plates 10 and 10 constituting a play adjustment part for adjusting the play between the joint parts 2a and 2b, and a lifting part for lifting by a lifting device (not shown). The lifting rib 11, the reinforcing rib 12, and the gap adjusting plates 10, 10, the base plates 13, 14, 15 forming the base portion on which the lifting rib 11 and the reinforcing ribs 12, 12 are erected. Although not illustrated, the installation jig 3b and the pair of installation jigs 3a have substantially the same configuration as the installation jig 3b, and thus detailed description thereof is omitted.

  Long holes 16 that are long in the horizontal direction are formed in the clearance adjustment plates 10 and 10 of the installation jig 3b. When the installation jigs 3a and 3b are arranged on the top surfaces of the joint portions 2a and 2b, the clearance adjustment plates 10 and 10 are arranged so as to overlap each other. The clearance between the joint portions 2a and 2b is adjusted by tightening together with the nut. Although not shown, a normal round hole is formed in the clearance adjustment plate of the other installation jig 3a.

  The base plates 14 and 15 are welded to the base plate 13. The clearance adjustment plates 10 and 10 are welded on the base plates 13, 14 and 15 so as to be parallel to each other. The lifting rib 11 is welded on the base plate 13 between the idle plates 10 and 10 so as to be perpendicular to the idle plates 10 and 10. The reinforcing ribs 12 are welded onto the extension of the lifting rib 11 of the base plate 13. The lifting rib 11 is formed with a through-hole 17 for passing a hook, a wire rope or the like for lifting by a lifting device.

  As shown in FIG. 6, the installation jig 4b includes a gap adjusting plate 20 constituting a gap adjusting portion for adjusting the gap between the joint portions 2a and 2b, and a base portion on which the gap adjusting plate 20 is erected. It has the base plates 21 and 22 which comprise. Although not shown, the installation jig 4b and the pair of installation jigs 4a have substantially the same configuration as the installation jig 4b, and thus detailed description thereof is omitted.

  A long hole 23 that is long in the horizontal direction is formed in the clearance adjustment plate 20 of the installation jig 4b. When the installation jigs 4a and 4b are arranged on the top surfaces of the joint portions 2a and 2b, the clearance adjustment plates 20 are arranged so as to overlap each other, and bolts and nuts are utilized using the long holes 23. The clearance between the joint portions 2a and 2b is adjusted by tightening together. Although not shown, a normal round hole is formed in the clearance adjustment plate of the other installation jig 4a. The base plates 21 and 22 are welded to each other. The gap adjusting plate 20 is welded onto the base plates 21 and 22.

  In the telescopic device 1 and the installation jigs 3a, 3b, 4a, 4b having the above-described configuration, the bolts 7 are tightened against the nuts 6 provided on the reinforcing ribs 5 of the joint portions 2a, 2b of the telescopic device 1 for installation. Fixing the jigs 3a, 3b, 4a, 4b to the expansion / contraction device 1 and adjusting the clearance between the joint portions 2a, 2b by the clearance adjustment plates 10, 20 makes it possible to easily install the expansion / contraction device 1.

  And the installation jig | tool 3a, 3b, 4a, 4b can be easily removed from the expansion-contraction apparatus 1 by loosening the volt | bolt 7 after installation. Moreover, since the nut 6 provided in the reinforcing rib 5 of the joint portions 2a and 2b of the telescopic device 1 is provided at a position that does not protrude from the top surface of the joint portions 2a and 2b, it is embedded in the bridge as it is with mortar or the like. It is not necessary to repair the telescopic device 1 after installation, and the telescopic device 1 can be easily installed.

  Further, since the installation jigs 3a and 3b are provided with lifting ribs 11 for lifting by the lifting device, the lifting device is utilized by using the through-holes 17 of the lifting ribs 11 when the telescopic device is installed. Therefore, it is not necessary to provide a separate hanging bracket as in the prior art. Moreover, after installation, it can be easily removed from the expansion / contraction apparatus 1 together with the installation jigs 3a and 3b as described above, and repair of the expansion / contraction apparatus 1 after installation is not necessary.

  The expansion device of the present invention and the installation jig thereof are useful as an expansion device for absorbing expansion and contraction of the bridge due to temperature changes, deformation of the bridge due to vibration caused by earthquakes and traffic of the vehicle, and the installation jig thereof. is there.

DESCRIPTION OF SYMBOLS 1 Expansion / contraction apparatus 2a, 2b Joint part 3a, 3b, 4a, 4b Installation jig 5 Reinforcement rib 6 Nut 7 Bolt 10, 20 Free adjustment plate 11 Lifting rib 12 Reinforcement ribs 13, 14, 15, 21, 22 Base plate 16, 23 Long hole 17 Through hole

Claims (3)

Expansion and contraction having a comb-shaped joint portion arranged opposite to each other with a gap between bridges and a reinforcing rib provided at a position below the top surface of the joint portion so as to protrude to the opposite side of the gap between the joint portions. A device,
And Joint Gap adjustment section for adjusting the Joint Gap of the joint portion, a nut which the base part of the installation jig is fixed by the bolt having a said base unit Joint Gap adjusting unit is provided with, before Kiho strong ribs A telescopic device welded to a position not protruding from the top surface of the joint. Expansion and contraction having a comb-shaped joint portion arranged opposite to each other with a gap between bridges and a reinforcing rib provided at a position below the top surface of the joint portion so as to protrude to the opposite side of the gap between the joint portions. A device installation jig,
To nut welded in a position not protruding from the top surface of the joint portion of the front Kiho strong ribs, a base portion which is fixed by a bolt,
An installation jig provided on the base portion and having a gap adjusting portion for adjusting a gap between the joint portions.   The installation jig according to claim 2, further comprising a lifting portion for lifting by a lifting device.

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