JP4102782B2 - Bridge girder delivery construction method and guide device used therefor - Google Patents

Description

  The present invention relates to a bridge girder feeding construction method in which a bridge girder is sent out by using a feed base installed on a column or indirectly through a sanddle, and a guide device used therefor.

Conventionally, a bridge girder is installed by installing a crawler type feed stand directly on a column (peer) or indirectly via a sanddle, and a pair of left and right guides in front of or behind the feed direction of the bridge girder. The thing of the structure which provided the apparatus is known (for example, refer patent document 1 and patent document 2).
The guide device of Patent Document 1 includes a guide portion that guides a flange projecting left and right from the lower end of the bridge girder, and a direction correcting and reaction force measuring means that communicates with a movable body that can move the guide portion in the vertical direction. Yes.
Moreover, the guide apparatus of patent document 2 is provided with the biasing means connected to the said movable body.
The direction correcting / reaction force measuring means and the urging means can control and correct the feeding direction of the bridge girder, and can stop the feeding of the bridge girder for a large feeding change of the bridge girder.
And in order to cope with a camber or the like of a bridge girder, the feed base is configured to be able to be driven so as to receive a predetermined gravity reaction force of the bridge girder with a hydraulic jack, while the guide unit is vertically It is composed of endless rollers that are connected endlessly by pins and ring plates, and the feed base is driven by the bridge girder so as to support the bridge girder under the predetermined gravity reaction force of the bridge girder. The guide portion is adapted to follow the flange when the flange of the bridge beam is locked to the step portion of the stepped roller.

  By the way, the bridge girder is not only a structure in which the flange protrudes in the left-right direction from the lower end (A type), but the so-called flange in which the lower end of the bridge girder is formed by a lower plate having an edge on substantially the same vertical line as the web. There are various configurations such as a configuration without a configuration (B type) and a configuration in which connection parts called contact plates are provided on the upper and lower surfaces of the flange (C type). For example, there is no flange for the purpose of cost, and the splicing plate is for connecting the beams.

In the case of such a structure in which the flange is locked to the stepped portion of the stepped roller and the guide portion is driven, there is no portion to be locked, for example, it cannot be used in a bridge girder such as the B type, and a flange such as the C type. When the end structure becomes large, a very long special stepped roller is required.
JP 2001-81730 A JP 2002-121708 A

  The present invention has been made in view of the above-mentioned conventional circumstances, and the intended process is a method for feeding a bridge girder that can feed a bridge girder and build it on a column without being influenced by the shape of the lower end of the bridge girder, and a convenient method for using it. It is to provide a guide device.

The technical means taken to solve the above-mentioned problem is that the method is to install a feed base directly or indirectly on each column along the feed direction of the bridge girder, and the front side of the feed girder in the bridge girder feed direction. Alternatively, a guide portion of a pair of left and right guide devices provided on the front side that is the same width as the bridge girder width or slightly wider than that is provided so as to be movable in the vertical direction. In a method for feeding a bridge girder in which the bridge girder is installed on each column by sliding on the feed table while passing between the guide portions, the bridge girder is provided with a predetermined set weight reaction force of the bridge girder. The pair of left and right guide portions can be engaged with the pair of left and right connecting portions provided on the machine base of the feed base and can be moved in the left and right direction. Contact us at the bridge girder The bridge girder feeding and erection method is characterized in that the guide part is moved in the vertical direction via the connecting part in synchronization with the bridge girder follow-up of the feed base that receives the set weight reaction force. ).
Here, being able to engage in the vertical direction of the connecting portion constitutes a relationship of engaging through a slight clearance that does not hinder the movement of the guide portion in the left-right direction.
And the general structure (A type) which made the flange protrude in the left-right direction at the lower end, the flange which protrudes in the left and right at the lower end, and the flange has a connecting portion called an attachment plate on the upper and lower sides (C type) (Claim 2), the lower end of the bottom plate having a configuration (B type) formed of a lower plate having an edge on substantially the same vertical line as the web (Claim 3) The bridge girder can be sent out regardless of the shape.
Since the left and right width dimensions of the lower end edge of the bridge girder are different between the A and C types and the B type, the positions of the pair of left and right guide portions also differ accordingly. For this reason, the connecting part has a long movable margin in the left and right direction of the pair of left and right guide parts so that it can be adapted from a narrow bridge girder such as B type to A, C type to a wide bridge girder. On the other hand, the guide portion is configured to be engaged in the up and down direction through a slight clearance so that it can be adapted to various bridge girder width dimensions.

  According to the above means, the bridge girder is pulled from the front side in the feeding direction or forcibly sent out from the front side, and the feed base is predetermined even when the height position of the bottom surface of the bridge girder is displaced by the influence of the camber or the like. The bridge girder is guided to slide up and down to receive the weight reaction force of the bridge girder. The guide unit synchronizes with the follower through the follow-up and moves in the vertical direction, and the guide unit is positioned at the lower edge height of the bridge girder.

Along with the feeding direction of the bridge girder, the feed leg is a hydraulic jack that is installed directly or indirectly on each column and can be moved up and down so as to receive a predetermined set weight reaction force of the bridge girder. A guide device used to sequentially feed bridge girders on a column and slide on the front side or the front side of the bridge girder feed direction of the feed stand in a direction crossing the bridge girder feed direction. A pair of left and right movable bodies, a pair of left and right guides which are attached to the movable body so as to be movable in the vertical direction and guide the lower edge of the bridge girder; A pair of left and right connecting parts with a guide part that moves the guide part in the vertical direction by bridge girder tracking, and a movable body arranged outside each movable body and biasing the movable part in a direction in which the guide part contacts the bridge girder. Correct the feeding direction of the bridge girder And means, but in communication movably said pair of right and left guide portions in the right and left pair of contact portions and the left-right direction can be engaged in the vertical direction (Claim 4).
In addition, it is preferable that the guide portion is composed of an endless roller in which a plurality of straight rollers are connected endlessly with a pin and a ring plate (Claim 5).

  According to the present invention, a connecting portion with a guide portion is provided on a machine base of a feed base that moves up and down to receive a predetermined set weight reaction force of a bridge girder. The guide part is synchronized with the up and down movement of the feed base so that it contacts the lower edge of the bridge girder through and moves up and down, so the bridge girder is guided and installed on the column without being influenced by the shape of the lower end of the bridge girder. It is possible to provide a bridge girder feeding method and a convenient guide device used for the method.

  In addition, since it does not depend on the shape of the lower end of the bridge girder, for example, a long stepped roller in order to correspond to a bridge girder having a flange projecting in the left-right direction at the lower end, a bridge girder having an attachment plate on the upper and lower surfaces, etc. As is the case with coping with this, the support part (movable body) has a sturdy structure to cope with the bending moment generated in the support part (movable body) of the guide part due to the displacement of the roller contact position with the bridge girder. Therefore, it is possible to reduce the size of the support part (movable body) itself, thereby reducing the equipment cost.

  In addition, for example, by securing a long left and right movable allowance for a pair of left and right guides in a pair of left and right connecting parts so as to accommodate a bridge girder with a narrow width dimension to a bridge girder with a wide width dimension, A degree of freedom according to the width dimension can be given.

  In addition, the guide portion of the guide device is constituted by an endless roller in which a plurality of straight rollers are connected endlessly with a pin and a ring plate as in claim 5, so that the structure is simple and Since the roller pitch can be made narrower than when a stepped roller is used, the guide performance of the lower end face (edge) of the bridge girder of the guide device (guide part) can be improved.

Next, the bridge girder feeding construction method and the guide device used therefor according to the present invention will be described with reference to the drawings. FIGS. 1 to 5 show this embodiment. A method for sending out the bridge girder and the guide device will be described.
Each figure illustrates a pair of left and right feed bases 1 and a guide device 2 which are arranged on the right side in the bridge girder feed direction in a plan view and the guide device 2 placed on the front side thereof.

  As shown in FIG. 1, the delivery of the bridge girder is carried out by installing a crawler-type feed stand 1 on a sandle assembled in a column (peer) P directly or in a manner that can be disassembled in the form of a cross girder. The guide unit 32 of the guide device 2 arranged in the guide guides the lower end of the bridge girder A, and the guide device 2 biases the guide unit 32 in a direction in contact with the lower end of the bridge girder A to correct the feeding direction of the bridge girder 52. When the bridge girder A feed-out direction is inclined, the means (for example, the direction correcting / reaction measuring means described in JP-A-2001-81730, the biasing means described in JP-A-2002-121708) Etc.) 52, the feeding direction of the bridge girder A is corrected, and the feeding of the bridge girder A can be stopped for a large feeding change of the bridge girder A.

  As shown in FIG. 1, the guide device 2 includes a pair of front and rear rails 12, a movable body 22, a guide portion 32, a connecting portion 42, means 52 for correcting the feeding direction of the bridge girder A, and the like.

  In this embodiment, the rail 12 is made of H steel. As described above, the bridge girder A is slidably guided by the feed base 1 using the hydraulic jack installed directly on the column (peer) P or on the sanddle as the support leg 11. It is laid in a direction crossing the front side of the feed direction.

  Although the movable body 22 is not shown in detail, as shown in FIGS. 1 to 5, a vertical hook 22b is fixed to the tip of the horizontal hook 22a, and the tip of the vertical hook 22b and the rear of the horizontal hook 22a are fixed. A frame is formed in a frame shape in which the end portion is connected by a slanting rod 22c, and a supporting frame 22d is attached to the side surface of the vertical girder portion 22b on the bridge girder side so that the guide portion 32 can be moved vertically, that is, slidable. The holding portions 22a ′ provided at both ends of the flange portion 22a can hold the flange 12a on the upper surface of the rail 12 and slide on the rail 12.

As shown in FIGS. 2, 3 and the like, the guide portion 32 has a holding portion 32a ′ provided on the back plate of the support body 32a having a substantially U-shaped cross section, and the flange 22d ′ of the support frame body 22d. The support frame 22d can be slid up and down as described above, the center plate 32b is installed over the upper and lower plates of the support 32a, and the endless roller 32c is wound around the center plate 32b. It is configured.
The endless roller 32c is formed by connecting a straight roller 32c ′ in an annular shape with a pin 32d and a ring plate 32e, and is rotated by the contact of the lower edge of the bridge beam accompanying the delivery of the bridge beam A to reduce the contact resistance. It is like that.

As shown in FIG. 1, means 52 for urging the guide portion 32 in a direction in contact with the lower end of the bridge girder to correct the feeding direction of the bridge girder, as shown in FIG. It consists of a jack.
The hydraulic jack 52 has a cylinder head 52 a attached to each of the pair of front and rear rails 12, 12 facing the outer surface of the horizontal flange 22 a of the movable body 22, and the movable body 22 is placed outside via a guide portion 32. The reaction force due to the external force moved in the direction is measured, and when the reaction force exceeds a predetermined limit force, the feeding of the bridge girder A is stopped via a control unit (not shown). The pair of left and right is expanded and contracted so that the movable body 22 having the guide portion 32 is slid so as to approach and separate from the bridge girder A to correct the feeding direction of the bridge girder A.

  As shown in FIG. 2, the crawler-type feed base 1 is configured such that a crawler 31 at the center in the longitudinal direction of the machine base 21 is rotatably wound, and both side portions of the machine base 21 constitute support legs 11. The reaction force due to the bridge girder load acting on the hydraulic jack is measured by a control unit (not shown), and the reaction force is measured by the weight of the bridge girder. The crawler of the feed base 1 is driven to the lower surface of the bridge girder corresponding to the camber of the bridge girder A by jacking up and down via a control unit (not shown) so as to receive the predetermined set weight reaction force calculated from Is controlled to do.

  As shown in FIGS. 1, 2, 4, and 5, the guide base 32 can be moved in the left-right direction on the machine base 21 of the feed base 1 and the feed base 1 can be moved to the bridge girder A. A communication unit 42 is provided to synchronize with.

  The connecting portion 42 includes a guide 42 a extending from both sides of the machine base 21 toward the left and right guide portions 32, and a guided portion 42 b extending from the guide portion 32. 42a provides a sliding gap 42c that opens the end on the guide part 32 side, while the guided part 42b is slidable in the left-right direction within the gap 42c and is engaged through a slight clearance in the vertical direction. Configured to match.

Further, the connecting portion 42 turns the arm 42d around to the front side or the front side in the bridge girder feeding direction of the feed base 1 in order to slidably guide the guided portion 42b protruding from the guide portion 32, and the arm 42d. The guide 42a is formed at the bottom, and a general bridge girder (indicated by a two-dot chain line in FIG. 4) with a flange protruding in the left-right direction at the lower end, and a lower plate having a lower plate having an edge on substantially the same vertical line as the web. The sliding gap 42c of the guided portion 42b is set to be long so as to be compatible with the bridge girder (FIG. 4) and the bridge girder (FIG. 5) having an attachment plate on the flange.
The guided portion 42b is to be guided to slide through the sliding gap 42c.

  The length of the sliding gap 42c is such that when the reaction force due to an external force that moves the movable body 22 outwardly through the guide portion 32 is measured during wide bridge girder guidance, the reaction force exceeds a predetermined limit force. The length is secured so that the guided portion 42b does not come out.

In the above configuration, the bridge girder A is sent out while the lower end edge of the bridge girder is in contact with the straight rollers 32c ′ and 32c ′ which are the constituent members of the guide portions 32 and 32 in the pair of left and right guide devices 2 and 2. However, if there is a slight angle deviation in the delivery direction, the delivery error increases with delivery. While measuring the reaction force acting on the hydraulic jack (support leg) 11 by a control unit (not shown), the one side (hydraulic jacks 52, 52 of the left and right guide devices 2, 2) is pressurized, The hydraulic jacks 52 and 52 of the right and left guide devices 2 and 2 are depressurized, and the left and right guide devices 2 and 2 are slid in the left and right directions to correct the delivery direction.
When the reaction force exceeds a predetermined limit force, it is judged as dangerous and the delivery of the bridge girder A is stopped.

Further, the bridge girder A is not exactly horizontal due to the camber and the like.
Therefore, as the bridge girder A is sent out, the hydraulic jack 11 as a support leg is jacked up and down so that the feed base 1 receives a predetermined set weight reaction force of the bridge girder A and is driven to the lower surface thereof.
By the jack-up / down operation, the guide portion 32 moves up and down at the connecting portion 42 that moves up and down by the same amount as the feed base 1 to maintain the straight roller 32c ′ in contact with the lower edge of the bridge girder.
Thereby, even if undulation or the like occurs in the longitudinal direction of the bridge beam A, the predetermined position of the straight roller 32c ′ can be accurately positioned at the contact height of the lower edge of the bridge beam.
4 shows a bridge girder A whose lower end is formed by a lower plate a1 having an edge on substantially the same vertical line as the web a, and FIG. 5 shows a bridge girder A having a connecting plate a3 on a flange a2. In FIG. 4, the two-dot chain line is attached to a bridge girder having a flange a2 projecting left and right from the bridge girder A, which is formed by a lower plate a1 having a lower end substantially on the same vertical line as the web a and the flange a2. A state in which the guided portion 42b is moved using the sliding gap 42c so as to correspond to the bridge girder having the plate a3 is indicated by a two-dot chain line.

  By adopting such a configuration, the lower end edge of the bridge beam A can be brought into contact with and guided at the same position of the straight roller 32c 'regardless of the width dimension or the lower end shape.

  Further, although not shown, instead of the rail 12, the movable body 22, and the direction correcting / reaction measuring means 52, a fixed frame (corresponding to a rail) laid on a column (peer) as described in JP-A-2002-121708. ), A movable frame (corresponding to a movable body) that can slide the fixed frame, and an urging means (corresponding to a direction correcting / reaction force measuring means) can be used freely. In this case, the guide portion 32 can be rotated in the horizontal direction as in the same reference.

  In each of the embodiments, the gap 42c provided in the connecting portion 42 has any structure such as a groove or a hole as long as the guided portion 42b can be guided to be engaged in the vertical direction. It is included.

A plan view showing a feed base and a guide device used in the implementation of the bridge girder feeding construction method of the bridge girder of the present embodiment is partially omitted. FIG. 2 is an enlarged sectional view taken along line (2)-(2) in FIG. 2 is partially cut away in the enlarged sectional view taken along line (3)-(3) in FIG. It is a part of the front view showing a state where the bridge girder is formed by a lower plate having a lower end having an edge on substantially the same vertical line as the web. The state which is guiding the bridge girder which has the flange sent out is shown. It is partially cut away and shown in a front view showing a state where a bridge girder having an attachment plate on a flange, which is an object to be sent out, is being sent out.

Explanation of symbols

A: Bridge girder 1: Feed base 2: Guide device 32: Guide unit 21: Machine base (machine base of the feed base) 42: Communication part a2: Flange a3: Connecting plate a: Web a1: Lower plate p: Column (peer) 11: Hydraulic jack (support leg)
22: Movable body 52: Means 32c 'for urging the guide portion in a direction in contact with the bridge girder to correct the feeding direction of the bridge girder 32c': Straight roller 32d: Pin 32e: Ring plate 32c: Endless roller

Claims (5)

  A feed stand is installed directly or indirectly on each column along the feed direction of the bridge girder, and is the same width or slightly wider than the bridge girder width on the front side or the front side of the bridge girder feed direction. A guide portion of a pair of left and right guide devices provided at a certain interval is provided so as to be movable in the vertical direction, the guide device can be moved in a direction intersecting with the feeding direction of the bridge girder, and the feed is performed while passing between the guide portions. In the bridge girder feeding and erection method in which the bridge girder is slid on the column and constructed on each column, the feed girder is configured to be able to follow up and down so as to receive a predetermined set weight reaction force of the bridge girder, and The pair of left and right guide portions are connected to a pair of left and right connecting portions provided on the machine base of the feed base so that the pair of left and right guide portions can be vertically engaged and moved in the left and right directions, and receives a predetermined set weight reaction force of the bridge girder. Synchronize with the bridge girder tracking Bridge girder of delivery erection method characterized by moving the guide portion via the contact portion in the vertical direction Te.   2. The bridge girder feeding and erection method according to claim 1, wherein the bridge girder has a flange protruding left and right at a lower end, and the flange has an attachment plate.   The bridge girder feeding and erection method according to claim 1, wherein the lower end of the bridge girder is formed of a lower plate having an edge on substantially the same vertical line as the web. A feed base with a hydraulic jack as a support leg that is installed directly or indirectly on each column along the feed direction of the bridge girder and can be moved up and down to receive the set weight reaction force of the bridge girder. , A guide device used to sequentially feed the bridge girder and build it on the column, and is slidable in a direction crossing the feeding direction of the bridge girder on the front side or the front side of the bridge girder feeding direction. A pair of left and right movable bodies, a pair of left and right guides that are attached to the movable body so as to be movable in the vertical direction and guide the lower edge of the bridge girder, and a bridge girder follower of the feed base. A pair of left and right connecting parts with a guide part that moves the guide part in the up and down direction by movement, and a movable body arranged outside each movable body, urging the guide part in a direction in contact with the bridge girder, and a bridge girder Means to correct the feed direction of Provided, movable communication with the guide device for feeding erection of the bridge girder, characterized in that that said pair of right and left guide portions in the right and left pair of contact portions and the left-right direction can be engaged in the vertical direction.   The guide device for feeding and laying a bridge girder according to claim 4, wherein the guide portion is constituted by an endless roller in which a plurality of straight rollers are connected endlessly by a pin and a ring plate.

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