JP2017128994A - Expansion device for bridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an expansion device for a bridge for aiming at a structure capable of eliminating the deterioration in travel performance of a vehicle, the prevention of a sliding phenomenon, criticism to noise-vibration and a shoe seat environment, by eliminating a clearance formable in a joint part of a bridge girder.SOLUTION: In an expansion in the bridge axial direction of a bridge girder, a conventionally used comb-shaped expansion device is used, and this device is used as a pedestal, and a slide plate for mutually contacting a pair of wedge-shaped inclined planes by hard rubber, is provided in the bridge axial right-angled direction in its upper part, and a clearance is eliminated by executing conversion of the expansion by the contra-action of the slide plate by using a gear, and a travel surface is made elastic by arranging the hard rubber as a rubber wheel and a cushioning material of a vehicle on the travel surface, and the expansion device for a bridge capable of eliminating the problem together with flushing of a road surface, is provided.SELECTED DRAWING: Figure 5

Description

  The present invention is a telescopic device for a bridge.

  In FIG. 1, the structure of the expansion-contraction apparatus is shown. There is a gap M between the bridge girders A1 and B1 on the pier (including the abutment), and there is a gap 1 in the direction of the bridge axis so that expansion and contraction due to temperature changes can be absorbed. A device is provided.

Technical literature

  JP-A-33410

Problems to be solved by the invention

  Although not all expansion devices, a gap 1 is provided to absorb expansion and contraction due to temperature changes of the bridge girder as shown in FIG. There are social criticisms such as “noisy” from local residents due to unpleasant feeling, vibration and noise, sedimentation of earth and sand falling from the gap 1, and problems such as deterioration of the Scorpio environment due to inflow of rainwater.

  Furthermore, a slip phenomenon occurs on the face plate F of the steel expansion and contraction device even during normal traveling, and there is a concern about the risk of driving operation particularly in sections with curved roads and curved bridges.

Means that the Invention is to Solve

  The point which was made into the subject of this invention is the method of eliminating the gap 1 first, and the second is the elimination of the slip phenomenon caused by the telescopic device. Based on these two points, the running road surface is made uniform. The means to do is described.

  In order to solve the first and second problems, the expansion and contraction in the bridge axis direction is handled by a conventionally used comb expansion and contraction device, and this expansion and contraction is converted into a direction perpendicular to the bridge axis. 2 is performed using the wedge-shaped slide plate 3 shown in FIG. 2, a comb-type expansion / contraction device is used for the pedestal that supports the slide plate 3, and the value converted in the direction perpendicular to the bridge axis is The conversion value depending on the shape is determined by the width of the wedge-shaped slide plate 3 (length in the bridge axis direction) and the slide plate inclination angle θ obtained from the lane width 2 shown in FIG. The conversion value becomes larger, and conversely, the conversion value becomes smaller as the inclination angle θ becomes larger. Therefore, the conversion value corresponds to the amount 10 of the slide plate protruding outside the lane width shown in FIG. This is a problem, but this response If there is no boundary between walking / roadway and where there is no sidewalk, it will be processed by the ground cover, and in the center of the roadway, the amount of overhanging lane 10 will be added, and depending on the amount of overhanging 10, there will be a median strip. If this is not the case, it will be necessary to consider how to reduce the overhang amount 10 if it is not. To reduce it, the inclination angle θ is changed by the width of the wedge-shaped slide plate 3 described above. The shape of the wedge-shaped slide plate 3 is determined, and the amount of overhang 10 is obtained from the amount of expansion and contraction that changes depending on the bridge length and the determined slide plate. In the expansion / contraction conversion, a gear diameter ratio between the A gear 7 subjected to expansion / contraction introduced from the bridge girder shown in FIGS. 2 to 6 and the B gear 8 to be reciprocally converted is obtained. A diameter corresponding to 2/3 of the slide plate fluctuation region S shown in FIG. 2 between the gravity center positions of both wedge-shaped slide plates 3 with respect to the axial direction is suitable for reciprocal action, and is effective in preventing eccentricity of the slide plate 3. It becomes a means.

  On the other hand, for the slip phenomenon that occurs on the face plate F of the comb-type expansion and contraction device that has been used conventionally, a hard rubber that has the same elasticity as the rubber wheel of the traveling vehicle and that has elastic restoring force is interposed, It is possible to improve the slip phenomenon by unifying the system with asphalt pavement, which is an elastic pavement that is widely used.

Effect of the invention

  As a combination, it realizes the problem that the gap 1 does not occur on the running road surface, and as a combination, it can handle the slip phenomenon by taking advantage of the characteristics of hard rubber, making the running road surface uniform, improving driving performance and noise, It can be effective in solving social problems such as vibration.

  Bridge axis direction cross section showing the joint part of the bridge girder   Wedge-shaped slide plate top view   Reciprocal conversion jig diagram   Cross section of telescopic transmission function   Plan view of the telescopic device that becomes the base   Telescopic transmission jig diagram

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  In order to eliminate the problem, the gap 1 is eliminated, and the running surface is flushed. The conventional comb-type telescopic device is used as a pedestal and the face plate F is shown in FIG. The sliding plate 3 is reciprocally slid in the direction perpendicular to the bridge axis by sliding the sliding plate 3 along the slide plate contact surface 5 with the inclined angle θ shown in FIG. As a means for this, the clearance 1 is transmitted to the B gear which is coaxial with the A gear 7 by using the expansion / contraction transmission jig shown in FIG. 6, and the wedge-shaped slide plate 3 is already placed on the face plate F. 3 is connected to the reciprocal conversion jig 4 embedded in FIG. 3, and the expansion and contraction in the direction of the bridge axis is converted to the direction perpendicular to the bridge axis by the reciprocal action, and the value is the slide plate outside the road width shown in FIG. Shows the same value as the overhang amount of 10. The expansion and contraction in the bridge axis direction appears in the movement of the slide plate fluctuation region S shown in FIG. 2, and the wedge-shaped slide plate 3 always moves with the face plate F and is held between the partition walls 9 shown in FIG. The slide plate tangent surfaces 5 that are in contact with each other along the inclined surfaces and are upright are capable of making the runway surface uniform without repeating the conflict 1 in the contact state.

  For the selection of the material of the wedge-shaped slide plate 3 with a uniform runway surface, in many cases, asphalt pavement, which is elastic pavement, is used for mounting pavement with the expansion / contraction device part, and the system is unified. Therefore, it is easy to adapt and has elastic restoring force, and using hard rubber, which is a material that absorbs and absorbs vibration and noise, unifies the system and makes the road surface uniform. Is.

  By using hard rubber for the wedge-shaped slide plate 3 that becomes the running road surface, it is possible to improve the discomfort of the riding comfort and the social criticism of vibration and noise caused by the impact and destructive sound when the vehicle is running. It becomes composition.

  The sliding phenomenon that occurs on the face plate F regardless of whether it travels in normal or rainy weather is similar to the rubber wheels of the vehicle by using hard rubber as the material of the wedge-shaped slide plate 3, and it is easy to be familiar with each other. At the same time, the surface of the runway is roughened with a shallow groove in an uneven shape to improve the resistance to slipping and solve the problem.

  By using the road surface having a cross slope, the uneven grooves described above are used as guide grooves to the road shoulder to prevent the inflow of fine earth and sand and rainwater generated by the traveling vehicle, and clearance 1 is eliminated. At the same time, it can be effective in improving the Scorpio environment.

  Further, in order to secure a stable reciprocal action of the wedge-shaped slide plate 3, the comb-shaped portion of the facing face plate F is utilized, the rotation shafts of the A gear 7 and the B gear 8 shown in FIG. By smoothly preventing the sliding in the direction and the eccentricity at the time of reciprocity, it becomes possible to ensure the amount of protrusion 10 of the slide plate shown in FIG.

  As a bridge expansion and contraction device, it has a structure that does not cause problems like conventional ones for improvement of vehicle running performance, criticism of noise / vibration, deterioration of scorpio environment, etc. It can be used.

A1 ・ B1 Bridge Girder M Slack S Fluctuation Range F Face Plate θ Slide Plate Inclination Angle 1 Gap 2 Lane Wideness 3 Wedge Slide Plate 4 Reciprocal Conversion Jig 5 Slide Plate Contact Road 6 Stretching Transmission Jig 7 A Gear 8 B Gear 9 Partition wall 10 Slide plate overhang (including temperature effect expansion and contraction during temporary installation)
11 Lifting prevention piece

Claims (2)

  In order to convert the expansion and contraction introduced from the bridge girder into the direction perpendicular to the bridge axis and eliminate the gap, a pair of wedge-shaped slide plates made of hard rubber are arranged in the direction perpendicular to the bridge axis, along the tangential surface where the inclined surfaces touch each other and stand upright. It is characterized by a structure in which the runway surface is made uniform by a structure that uses a comb-type expansion device that supports the fluctuation range of the slide plate as a pedestal by sliding oppositely with expansion and contraction from the bridge girder as the introduction source Telescopic device for bridges.   The expansion and contraction introduced from the bridge girder is transmitted to the gear using an expansion and contraction transmission jig fixed to the bridge girder, and a pair of wedge-shaped slide plates are used to secure the amount of movement necessary for conversion in the direction perpendicular to the bridge axis. The gear diameter ratio between the input side gear and the output side gear is calculated to amplify the amount of expansion and contraction, to match the reciprocal conversion amount of the slide plate and the expansion amount from the bridge girder, and utilized the gear for conversion of expansion and contraction A telescopic device for bridges characterized by its construction.

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