JPS5931602B2 - bridge expansion joint - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved double-end supported finger joint.

In general, this type of joint has a rigid structure at the anchorage, so it often breaks due to stress imbalance due to manufacturing errors, construction errors, sudden wheel loads, etc.

In addition, the sagging behavior of the floor slab and girder causes a rotation angle, creating a step at the tip of the finger, which causes noise and damage.

The present invention attempts to solve these drawbacks by preventing the tip of the finger from lifting up and by absorbing the stress at the anchoring part. In a double-end support type finger joint consisting of a pair of fins that are connected to each other and intertwine alternately, the member is passed and fixed across the tip of each finger that is connected to one face member, and is connected to the other face member. A bridging member is also fixed to the distal end of each finger, and the bridging member fixed to the distal end of the finger connected to one face member is
A bridge member fixed to the distal end of the finger that connects to the other face member is connected between the lower part of the finger that connects to the other face member and the upper part of the rigid member. The face plate connecting the fingers is a bridge expansion joint that is anchored downward via a rigid member.

Next, embodiments of the present invention will be described based on the drawings.

Figure 1 shows a basic embodiment of the bridge expansion joint of the present invention.
The figure and FIG. 3 each show one of a pair of expansion joints facing each other with a play space in between.

In the drawings, 1a and 1b are rubber face members, 2a
, 2b is the upper surface of the finger, 3a and 3b are the transition members 4
a and 4b are rigid members.

The face members 1a and 1b extend in the width direction of the bridge and have finger lower surface portions 5a and 5b protruding from the fingers 6a and 6b in the bridge axis direction.

The upper surface parts 2a and 2b of the fingers are made of steel and are overlapped with the lower surface parts 5a and 5b of the fingers that protrude in the bridge axis direction from the face members 1a and 1b to form a body and are integrally constructed with the face members 1a and 1b. Together with the finger lower surface parts 5a and 5b, fingers 6a and 6b are formed.

The transition members 3a, 3b have an integral structure made of the same material as the face members 1a, 1b and the lower fingers 1I5a, 5b, and are located on the lower surface of the tips of the fingers 6a, 6b, that is, the transition members 3a are located on the lower surface of the tips of the fingers 6a. The transition member 3b is located on the lower surface of the tip of the finger 6b, crosses over the finger 6a or 6b, and is fixed to the finger 6a or 6b.

The rigid members 4a, 4b are made of steel or the like, and are anchored to the floor slabs A, B, etc. with angle irons 7a, 7b sandwiched between them and the face plates 1a, 1b.

In this way, each finger 6a connected to one face member 1a has a spanning member 3a fixed to its tip, and a spanning member 3b is also fixed to the tip of the finger 6b connected to the other face member 1b. At this time, the transition part 3a fixed to the tip of the finger 6a connected to one face member 1a is connected to the rigid member 6b between the lower part of the finger 6b connected to the other face member 1b and the upper part of the rigid member 4b. 4b, and is fixed to the tip of the finger 6b connected to the other face member 1b. The finger 6a is positioned without being fixed to either the finger 6a or the rigid member 4a, and the finger 6a
, 6b is located on the play area C of the floor slabs A and B facing each other,
Fingers 6a and 6b are set so as to intertwine alternately in the bridge width direction.

Anchoring to the floor slab is done with bolts (not shown) through anchor holes 8a, 8b.

In this example, a part of the finger and the transition member are integrally formed of the same material as the face member, but they may be made of different materials, or the finger may be made of only steel. Of course, it may be.

Further, the anchoring portion such as the face member and a portion of the finger may have an integral structure or a separate structure as long as they can be connected.

4 and 5 show another embodiment, which is basically the same as the embodiment described above, but with face members 1a and 1b.
The difference is that the width of the two is different and that the transition members 3a and 3b are located slightly inside.

The embodiment shown in FIG. 6 shows a case where the fingers 6a and 6b have a separate structure in which both the fingers 6a and 6b are made of a completely different material from the face member.

Since the present invention is configured in this way, the transition member fixed to one finger is located under the other finger, and the transition member fixed to the other finger is located under one finger. Because it is being
It is possible to prevent the tip of the finger from lifting up due to sagging of the girder or floor slab.

Furthermore, since the face plate, which is an elastic member of the anchoring portion, has deformability, stress imbalance can be followed by deformation of this elastic member.

Therefore, not only can the noise of the traveling vehicle be reduced, but also manufacturing errors, construction errors, and stress imbalance due to sudden wheel loads can be absorbed, and damage to the joint can be prevented.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view of a basic embodiment, and FIGS. 2 and 3 are perspective views showing each one of a pair of joints facing each other with a play space in between. Fig. 4 is a perspective view showing another embodiment, Fig. 5 is a perspective view showing one side of a pair of joints facing each other with a clearance, and Fig. 6 is a cross section showing another embodiment. It is a diagram. In the drawings, 1a and 1b are face members, 2a and 2b
are the upper surfaces of the fingers 6a and 6b, 3a and 3b are transition members, 4a and 4b are rigid members, and 5a and 5b are the fingers 6
These are the lower surfaces of a and 6b.

Claims (1)

[Claims] 1. In a double-end supported type finger joint consisting of a pair of fingers that are connected to one side of the facing member and intertwine with each other alternately, the member is fixed across the tip of each finger that is connected to one face member. , a transition member is also fixed to the tip of each finger connected to the other face member, and the transition member fixed to the tip of the finger connected to one face member is connected to the tip of the finger connected to the other face member. The transition member fixed to the tip of the finger connected to the other face member between the lower part and the upper part of the rigid member is located without being fixed between the lower part of the finger connected to one face member and the upper part of the rigid member. What is claimed is: 1. A bridge expansion joint characterized by a bridge, and a face plate connecting the fingers is anchored downward via a rigid member.