JP6195534B2 - Bearing type pin support and reinforcement method - Google Patents

Description

  The present invention relates to a bearing type pin support and the like.

  There is a type of support structure for bridges called “bearing type pin support”. The bearing type pin bearing has a structure that prevents the upper collar from being lifted by moving the upper collar with a pin placed horizontally on the lower collar and covering the upper collar, the lower collar and the pin together with a cap on each of the left and right end faces. Have. Although the case of adopting bearing type pin bearings has rarely been adopted in newly built bridges, there are still many remaining in existing bridges. Therefore, a technique for seismically reinforcing an existing bearing type pin bearing has been developed (see, for example, Patent Document 1).

JP 2012-127072 A

  The present invention has been devised for the purpose of realizing a technology for providing a new bearing type pin bearing having improved earthquake resistance by improving an existing bearing type pin bearing.

  According to a first aspect of the present invention for solving the above-mentioned problems, the upper collar is supported in a movable manner by a pin that is placed horizontally on the lower collar, and the upper collar, the lower collar, and the pin are collectively covered with a cap on each of the left and right end surfaces. This is a support-type pin support that prevents the upper collar from being lifted, and includes a restriction structure that connects the left and right caps and restricts the separation between the caps.

  When the bearing type pin bearing is subjected to a severe earthquake, the bridge part may swing horizontally, and the pin may break due to the pulling force acting on the pin bearing. According to the first invention, the pulling force acting on the pin bearing can be shared and received by the limiting structure that connects the pin and the cap. Therefore, a new bearing type pin bearing with improved earthquake resistance can be realized.

  A second invention is the bearing pin support according to the first invention, wherein the restriction structure includes a flange provided in the cap and a connecting portion that connects the left and right flanges.

  According to the second invention, it is possible to improve the earthquake resistance while suppressing an increase in the number of parts.

  According to a third aspect of the invention, the restriction structure includes a flange portion that is additionally installed so as to cover the cap, and a connecting portion that connects the left and right flange portions. It is a pressure type pin bearing.

  According to the third aspect of the invention, even when the cap cannot be replaced, it is possible to easily improve the bearing-type pin bearing with improved earthquake resistance by adding the flange portion and the connecting portion.

  According to a fourth aspect of the present invention, the upper collar is supported by a pin horizontally placed on the upper part of the lower collar, and the upper collar, the lower collar, and the pin are collectively covered with a cap on each of the left and right side end surfaces to cover the upper collar. A method for reinforcing an existing bearing type pin bearing for preventing lifting, in which the existing cap is replaced with a new cap with a flange, and the flanges of the new caps on the left and right are connected by a connecting member. And a reinforcing method.

  According to a fifth aspect of the present invention, the upper collar is supported by a pin horizontally placed on the upper part of the lower collar, and the upper collar, the lower collar, and the pin are collectively covered with a cap on each of the left and right side end surfaces. A method for reinforcing an existing bearing-type pin bearing that prevents the lifting of a ridge, wherein a flange portion that covers the existing cap is additionally installed, and the flange portions that cover the left and right caps are connected by a connecting member. And a reinforcing method.

  By implementing the reinforcing methods of the fourth and fifth inventions, it is possible to improve the earthquake resistance of the existing bearing type pin bearings, and the same effects as those of the first invention can be obtained.

The perspective view which shows the structural example of the bearing type pin support of 1st Embodiment. The front view which shows the structural example of the bearing type pin support of 1st Embodiment. The fragmentary sectional view in front view which shows the structural example of the bearing type pin support of 2nd Embodiment. The perspective view which shows the modification of a bearing type pin support.

[First Embodiment]
FIG. 1 is a perspective view showing an example of the configuration of a bearing type pin bearing 10A according to a first embodiment to which the present invention is applied. FIG. 2 is a front view of the same.

  The pressure bearing type pin support 10A of the present embodiment covers the upper collar 12, the lower collar 14, and the pin 16 together on the left and right side end faces and covers them with a cap 18, thereby preventing the upper collar 12 from being lifted. The cap 18 is integrally provided with flanges 20R and 20L. Further, the pin 16 has a portion having a large diameter and a portion having a small diameter, and both ends thereof are formed as a thin portion, and a male screw is cut. The left and right flanges 20R, 20L are connected and fixed by a single or a plurality of connecting members 22.

  The connecting material 22 can be realized by, for example, a steel bar or a steel wire. The method of coupling with the flanges 20R and 20L can be selected as appropriate, such as bolt fixing or welding.

  Since the bearing type pin support 10A of the present embodiment can support the vibration of the bridge part 3 in the direction orthogonal to the bridge axis (left and right direction in FIG. 2) caused by the earthquake with the pin 16 and the connecting member 22, only the pin 16 is used. It will have high earthquake resistance compared to the conventional support.

  When this embodiment is applied to an existing bearing type pin bearing, that is, when an existing bearing type pin bearing is to be reinforced, a cap without a flange originally provided is replaced with a new cap 18 having flanges 20R and 20L. And the two members may be connected together by the connecting member 22. Since the construction contents are extremely simple and can be performed in a short time, the construction cost is low and construction under existing conditions is possible.

[Second Embodiment]
FIG. 3 is a partial cross-sectional view as viewed from the front, showing a configuration example of the bearing type pin bearing 10B of the second embodiment. In addition, the same code | symbol is provided about the component similar to 1st Embodiment.

  In the pressure bearing type pin bearing 10 </ b> B of the present embodiment, the flanges 20 </ b> R and 20 </ b> L are provided separately from the cap 18. Specifically, the flanges 20R and 20L of the present embodiment include an insertion hole 20a through which an end portion of the pin 16 and a nut fastened to the end portion can be inserted, and a fitting portion 20b that fits into the cap 18. Have And it attaches so that the two caps 18 on either side may be inserted | pinched from the outer side of the cap 18 further.

  When the present embodiment is applied to an existing bearing type pin bearing, the flanges 20R and 20L of the present embodiment may be attached to the outside of the existing bearing type pin bearing and integrally connected and fixed by the connecting member 22.

  In the present embodiment, the same effects as those of the first embodiment can be obtained. In particular, when the present embodiment is applied to an existing bearing type pin bearing, the existing nut is not only replaced but also the existing nut is loosened. There is no need and it can be improved to a new bearing type pin bearing with improved seismic resistance in the existing state.

[Modification]
In addition, the application form of this invention is not limited to these, A component can be added, abbreviate | omitted, and changed suitably.

  For example, the number and material of the connecting members 22 and the form as a single unit can be changed as appropriate. The number of the connecting members 22 may be four or more, or may be two in total, one on each side of the pin 16 with the pin 16 interposed therebetween, as in the bearing type pin bearing 10C of FIG. Moreover, about the form as a single-piece | unit, you may implement | achieve not only a stick | rod or a wire but a board | plate, a pipe | tube, a chain | strand, etc.

DESCRIPTION OF SYMBOLS 3 ... Bridge part 10A-10C ... Bearing pressure type pin support 12 ... Upper collar 14 ... Lower collar 16 ... Pin 20R, 20L ... Flange 20a ... Insertion hole 20b ... Fitting part 22 ... Connecting material

Claims (4)

A support bearing type pin bearing that supports the upper collar with a pin placed horizontally on the lower collar, and prevents the upper collar from being lifted by covering the upper collar, the lower collar, and the pin together with a cap on each of the left and right end faces. Because
The left and right caps each have a flange,
A connecting portion for connecting the flanges of the left and right caps before and after the pin is sandwiched between them;
Bearing type pin bearing with A support bearing type pin bearing that supports the upper collar with a pin placed horizontally on the lower collar, and prevents the upper collar from being lifted by covering the upper collar, the lower collar, and the pin together with a cap on each of the left and right end faces. Because
Left and right flanges additionally installed to cover the left and right caps ;
A connecting portion for connecting the left and right flange portions;
Bearing type pin bearing with The upper heel is supported by a pin horizontally placed on the upper part of the lower heel, and the upper heel, the lower heel and the pin are collectively covered with a cap on each of the left and right side end faces to prevent the upper heel from being lifted. A method of reinforcing a bearing type pin bearing,
Replacing the existing cap with a new flanged cap;
Connecting the flanges of the left and right caps with connecting members before and after the pin ;
Including reinforcement method. The upper heel is supported by a pin horizontally placed on the upper part of the lower heel, and the upper heel, the lower heel and the pin are collectively covered with a cap on each of the left and right side end faces to prevent the upper heel from being lifted. A method of reinforcing a bearing type pin bearing,
Additionally installing a flange covering the existing cap;
Connecting the flange portions covering the left and right caps with a connecting member;
Including reinforcement method.

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