JPS6033126Y2 - road expansion joint - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a road expansion joint that uses the elasticity of an elastic body to absorb changes in the spacing of road joints due to changes in environmental temperature (E).

A typical conventional joint of this type has the structure shown in FIG.

In other words, this is an elastic body (synthetic rubber, etc.) with a square cross section.
A is the base, and L angle materials are attached to the bottom of both sides.
It has a structure in which a top plate C such as a steel plate is embedded in the upper center of the top plate facing b, and grooves d, d, and e are provided on both sides of the top surface and in the center of the bottom surface, respectively, and L angles b on both sides, Pass the anchor bolts buried in the floor plates f and f facing each other at the joint into the bolt holes drilled in b, and fix them with □Narat.

□ In this conventional device, the amount of change in the seam spacing is absorbed by deforming the concavities WIId, d, and e in accordance with the elastic deformation ratio of the base a.

However, this groove d. The width and depth of d and e have upper limits on the strength of the joint, so if it is used in areas where there is a large change in the joint spacing, there is a tendency for early fatigue such as cracks in the base j. There is difficulty in using =,
;1. l'1l11 The expansion joint of the present invention is integrally equipped in the width direction with a load supporting part extending between the joint gaps, and an elastic part having a bellows structure made of an elastic body, with both sides of the whole being a mounting part. The structure is as follows.

Specifically, the structure will be clarified by the examples described below.

゛Hereinafter, a description will be given based on the embodiments shown in FIGS. 2 to 4.

FIG. 2 shows the basic form of the present invention, in which the expansion joint 1 is integrally provided with a load support part 2 and an expandable part 3 in the width direction, and both sides of the whole are used as attachment parts 4, 4.

Although the expansion joint 1 is shown only in cross section, the fact that this joint has the same cross section and a length corresponding to the width of the road is the same as in the conventional joint.

The load support section 2 itself does not necessarily have to have an elastic section, but it is preferably made of an elastic body as in the conventional example shown in FIG.

The load support part 2 has a structure extending between the seams, and may be made of, for example, a single steel plate.

Moreover, when using the structure shown in FIG. 1, the left and right anchor bolts are not necessarily required.

However, in the case of this embodiment, the anchor bolt 7 is required because one end forms the attachment part 4.

As shown in the figure, the extensible part 3 is integrally continuous with the load supporting part and has a bellows structure made of an elastic body.

When the base of the load support part is an elastic body, it is integrally formed continuously from the elastic body.

In the bellows structure, the hollow part 10 is made of one layer, and the thickness of the partition wall is approximately 175 times the thickness of the entire elastic group, which is quite thick.

The thickness of the partition wall 115 is the maximum thickness when one layer of hollow portion is obtained in the entire thickness.

For the mounting parts 4 on both sides, the mounting part 4 on the load supporting part side is equipped with a load supporting part reinforcing material 8 such as an L angle, and the mounting part 4 on the telescopic part side is a telescopic part reinforcing material made of channel material with a U-shaped cross section. 9 is embedded to strengthen the connection between the expansion joint 1 and the floorboard 5, and to reinforce the attachment part.

In this case, the load support section 2 has an elastic body as a base body as shown in FIG.

Further, the reinforcing members 8 and 9 are provided with bolt holes in their bottom portions for receiving the anchor bolts 7 at regular intervals in the longitudinal direction of the expansion joint 1.

In the embodiment shown in FIGS. 3 and 4, there are elastic parts 3 on both sides of the load support part 2.
, 3, reinforcing members 9.9 made of U-shaped channel material with bolt holes provided at regular intervals in the longitudinal direction are also embedded in the mounting parts 4.4 on both sides to reinforce the mounting parts. is being measured.

Since the present invention has the above-described configuration, the expansion and contraction of the floorboards 5, 5 due to environmental temperature changes, that is, the amount of change in the joint spacing, is absorbed by the expansion and contraction portion 3.

At this time, since the elastic part has a bellows structure, it has much better elasticity and can absorb a large amount of change compared to a solid elastic body or a simple hollow structure.

However, the expansion and contraction of the bellows structure is different from the expansion and contraction of the corrugated structure that the present inventor developed earlier, in that the displacement is mainly in the axial direction, and the displacement in the vertical direction with respect to the axis is small, and the center part of the expansion joint 1 is lifted by compression. It also eliminates the inconvenience of being caught.

These exhibit excellent effects as expansion joints used in seam spacings where the amount of change is large.

In addition, the bellows structure of the expandable part in the present invention has the partition wall as thick as possible, which is the total thickness of 175 mm, and the hollow part of the bellows is made of one layer, so that it can sufficiently withstand the load of passing vehicles.

Therefore, there is no impact on passing vehicles.

In the embodiment shown in FIGS. 4 and 5, the reinforcing members 9 for the expandable portion 3 are all U-shaped, so that the force transmitted to the expansion joint 1 due to expansion and contraction of the road is uniformly distributed over the thickness of the joint. This is to do so.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the conventional example, and Figure 2 is a cross-sectional view of the first example according to the present invention.
FIG. 3 is a cross-sectional view of the second embodiment of the present invention, and FIG. 4 is a perspective view of FIG. 3. - 1: Expansion joint, 2: Load support section, 3: Expandable section, 4: Mounting section, 8: Load support section reinforcement material, 9: Expandable section reinforcement material, 10: Hollow section, 11: Partition wall.

Claims (1)

[Scope of utility model registration request] (1) = □ A load support part spanning between the seams and an elastic part with a bellows structure made of an elastic body are integrated in the width direction, and both sides of the whole are used as attachment parts, and the bellows structure of the elastic part is a bellows structure. The thickness of the partition wall constituting the partition wall is about 175 mm of the total thickness, forming a single layer of hollow space, and at least the expansion and contraction part side of the mounting part is made of a channel material having a U-shaped cross section. , a road expansion joint characterized in that a reinforcing material with bolt holes provided at regular intervals in the longitudinal direction is embedded in the bottom of the joint. \,...(1)-■□ The road expansion joint according to claim 1, comprising an expandable part on one side of the load support part. (1)-■ The road expansion joint according to claim 1, comprising expansion and contraction parts on both sides of the load supporting part.