JPH09256479A - Gangway footplate structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure capable of reinforcing a rear side against a load, and automatically maintaining the center position of a gangway foot plate always at a center between both floor slabs, even upon the occurrence of the contracting or expanding displacement thereof due to an earthquake or the like, regarding a gangway footplate laid at a place involving a large gap. SOLUTION: A gangway footplate 2 provided between floor slabs 1 adjacent to each other has a reinforcement 7 on the lower center surface thereof, and a centering means 8. This centering means 8 is formed out of a pair of upper and lower sleeves rotatably held, a pair of swing arms projected from the external surface of each sleeve at 180-degree intervals, with the ends kept in contact with the edges of the floor slabs 1, and a spring laid between both sleeves for the energization thereof along directions opposite to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a cross plate structure which is bridged between floor slabs of adjacent buildings and connects the floor slabs of both buildings.

[0002]

2. Description of the Related Art When continuously connecting floor slabs of independently constructed adjacent buildings, a crossing plate (also called a bridge plate) is used.
The floor slabs of both buildings are made continuous while ensuring flexibility by taking into account the difference in natural vibration of both buildings. There are various types of these transition plates shown in FIG.

That is, as shown in FIG. 5 (a), one end of each floor slab 1 is rotatably supported, and the other end overlaps with each other so that they can move relative to each other. , (B), one end of one floor slab 1
Is rotatably fixed to the end of each floor slab 1, and the other end is attached to the upper surface of the end of each floor slab 1 as shown in crossovers b and (c) of the type in which the other end is installed on the upper end of the other slab 1. There are transition plates c and the like just installed, and each of them is made of a steel plate.

The distance between the two buildings on which such a span plate is installed is generally 10 to 20 cm. With such a gap size, problems such as distortion or deformation of the span plate even when a load is applied to the upper part of the span plate occur. Absent.

[0005]

However, when the gap between both buildings is widened to about 50 to 60 cm, it is necessary to devise a method for installing this type of cross plate. That is, as described above, this type of transition plate is made of a steel plate, and when it is wide, it is likely to be bent by an upper load, and when walking on it, it may be distorted or deformed.

However, when reinforcing members such as ribs are installed on the bottom surface to reinforce the cross plate, as will be understood from FIG. 5, the end portions of the reinforcing members are expanded and contracted due to the expansion and contraction of the space between both floor slabs due to an earthquake or the like. There is a concern that it may collide with the end surface of the floor slab and damage this part, or the slab itself may be damaged.In some cases, the slab will move to one floor slab side and the other slab side It may fall out.

The present invention has been made to solve the above problems, and an object thereof is to make it possible to reinforce the back surface against a load in a transition board installed when the gap spacing is wide, and to prevent both floors from being damaged by an earthquake or the like. (EN) Provided is a transition plate structure in which the center position of the transition plate is always automatically maintained at the center position between both floor slabs even if expansion / contraction displacement occurs between the plates.

[0008]

In order to achieve the above-mentioned object, the present invention is a transition board which is bridged between adjacent floor slabs, and a reinforcement is arranged at the center of the lower surface of the transition board. And centering means are provided, and the centering means includes a pair of upper and lower sleeves rotatably supported,
A pair of swivel arms projecting from the outer circumference of each sleeve at intervals of 180 ° and having their tips in contact with the end faces of the floor slabs are interposed between the sleeves to attach the sleeves in opposite directions. And a spring means for urging.

As described above, the central portion of the transition plate can be reinforced with the reinforcing material. Further, the respective pivoting arms of the centering means are X-shaped, and their tips are brought into contact with the end faces of the adjacent floor slabs, and the center position of the cross plate is in the abutting state by the biasing by the spring means. Is held in a central position between. From this state, when the gap distance is expanded or contracted by the relative displacement of both floor slabs, the swing arm follows the displacement while the opening degree is expanded and reduced according to the urging force of the spring means, and the central position of the cross plate is between the two slabs. Is held in the central position of.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 and 2 show a connecting portion between floor slabs 1 provided with a transition plate 2 according to the present invention.

In the figure, a stepped portion 1a is formed on the upper surface of the front end portion of the floor slab 1 which is opposed to the floor slab 1 with a predetermined gap. The crossover board 2 is installed with a sufficient installation allowance, and the upper surface of the crossover board 2 is covered with a tile carpet 3 so that the connecting portion of the crossover board 2 has an apparent continuity with each floor slab 1. .

Further, a fixed guide plate 4 is integrally formed at a tip end portion of each floor slab 1, and a lower portion of the guide plate 4 lower than the step portion 1a is in contact with the lower surface of the transition plate 2. Rollable guide roller 5 is fixedly arranged,
This enables smooth movement of the transition plate 2 according to the relative displacement of each floor slab 1.

Further, at the center of the lower surface of the transition plate 2, a bearing portion 6 and a reinforcing material 7 are integrally formed around the bearing portion 6, and at the lower portion of the bearing portion 6, both sides of the guide plates 4 are provided. Centering means 8 is arranged for elastically contacting the vertical end faces to keep the center position of the transition plate 2 at the center position between the floor slabs 1 at all times.

3 and 4 show detailed structures of the bearing portion 6 and the centering means 8. In the figure, the bearing portion 6 is integrated in the center of the lower surface of the transition plate 2 by welding or the like, has a flat cylindrical shape, and has a screw hole 6a in the center thereof. A plurality of reinforcing members 7 are radially integrated around the bearing portion 6, and the upper surface thereof is fixed to the lower surface of the transition plate 2 by welding. Each of the reinforcing members 7 has a taper shape that inclines toward the upper side, and the length thereof is set to be equal to or less than the predicted minimum gap distance between both floor slabs 1 and moreover, with respect to the gap direction between both floor slabs 1. By arranging it obliquely, the length can be increased.

The centering means 8 has a pair of upper and lower sleeves 10 which are rotatably pivoted around a shaft body 9 which is screwed into the screw hole 6a, and 180 on the outer circumference of each sleeve 10.
A revolving arm 11 is integrally provided so as to project at opposing positions, and a spring 12 that is disposed in a recess between the sleeves 10 and urges the sleeves 10 to rotate in opposite directions.

A boss 11a is provided at the tip of each revolving arm 11.
The vertical guide roller 14 which rolls in contact with the vertical end surface of the guide plate 4 is integrally mounted on the boss portion 11a through a mounting tool 15 such as a bolt and a nut. ing. As an alternative to such a guide roller 14, the tip of the revolving arm 11 may be made of a low friction member.

In the assembled state of each sleeve 10, the centering means 8 is arranged at the central position of the lower part of the transition plate 2, and the urging force of the spring 12 causes the respective pivot arms 11 to cross in an X-shape at the tip thereof. By pressing the guide roller 14 against the vertical end surface of each fixed guide plate 4, the center position of the transition plate 2 is always held at the center position of both floor slabs 1.

From this state, when the gap distance is expanded / contracted by the relative displacement of the floor slabs 1, the pivot arm 11 follows the displacement while the opening degree thereof is expanded / contracted according to the urging force of the spring 12, and the center of the transition plate 2 is expanded. The position is moved to and held at the central position between both floor slabs 1.

As described above, even if the floor slabs 1 move relative to each other due to an earthquake or the like, the bridge plate 2 is automatically held at the center position between them, so that the bridge plate 2 may be displaced or dropped. Therefore, the connection between both floor slabs 1 can be reliably maintained.

When the gap between the floor slabs 1 becomes less than the length of the reinforcing material 7, the crossing plate 2 will ride on the floor slab 1 along the taper of the reinforcing material 7. It is possible to prevent damage to the end surface of the floor slab 1 and deformation of the transition plate 2 itself.

[0021]

As is apparent from the above description, in the transition plate structure according to the present invention, the load bearing reinforcement effect can be obtained by the reinforcing material in the central portion of the transition plate.

Further, even if a relative displacement occurs between the two floor slabs, the center position of the bridge plate is always automatically moved and held at the center position between the two floor plates by the centering means. And can be prevented from falling off.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a transition plate structure according to the present invention.

2 is a cross-sectional perspective view of FIG.

FIG. 3 is an exploded perspective view showing a mounting relationship between a sleeve of a centering unit and a spring.

FIG. 4 is an exploded perspective view showing an assembly structure of centering means.

5A to 5C are cross-sectional views showing a structural example of a conventional crossover plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floor slab 2 Cross plate 6 Bearing part 7 Reinforcing material 8 Centering means 9 Shaft body 10 Sleeve 11 Revolving arm 12 Spring

Claims (1)

[Claims] 1. A bridge plate that is bridged between adjacent floor slabs, wherein a reinforcing member is arranged at the center of the lower surface of the bridge plate and centering means is provided, and the centering means is rotatable. A pair of upper and lower sleeves supported,
A pair of swivel arms projecting from the outer circumference of each sleeve at 180 ° intervals and the tips of which are in contact with the end faces of the floor slabs are interposed between the sleeves to attach the sleeves in opposite directions. A bridge plate structure comprising a spring means for urging.