JPH09279696A - Bridge board structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hold a bridge board and a floor slab in the same plane while smoothly conducting the relative displacement of the floor slab and the bridge board. SOLUTION: In a bridge board 2 stretched between mutually adjacent floor slabs 1, flexible treads 3 constituted by mutually connecting a large number of small blocks rotatably by pins are installed integrally at both ends of the bridge board 2. Stepped sections 1a indented in the thickness of the treads 3 for forming the top faces of the floor slabs 1 and the top faces of the treads 3 placed on the top faces of the floor slabs 1 in continuous flat planes and slits 1b, which are formed in the floor slabs 1 while being continued to the stepped sections 1a and in which the treads 3 are housed in a freely projecting- retreating manner, are formed to the floor slabs 1.

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 bridge board structure that is bridged between floor slabs of adjacent buildings and connects the floor slabs of both buildings.

[0002]

2. Description of the Related Art In order to continuously connect floor slabs of adjacent buildings constructed independently of each other, bridges (also referred to as transition boards) are laid over each other so that the difference in natural vibration between the two buildings can be reduced. The floor slabs of both buildings are made continuous while ensuring flexibility in consideration. There are various types of bridge plates shown in FIG.

That is, as shown in FIG. 7 (a), a bridge plate a of a type in which one end is rotatably supported at the end of each floor slab 1 and the other ends are movably superposed on each other, , (B), one end is rotatably fixed to the end of one floor slab 1 and the other end is installed on the upper surface of the end of the other floor slab 1 (b), (c) ), There are bridge plates c whose both ends are simply installed on the upper surfaces of the end portions of each floor slab 1, and these are all made of steel plates.

[0004]

By the way, in the conventional bridge deck structure, in order to reduce friction when the bridge deck moves relative to the floor deck top surface, it is placed on the floor deck top surface. The end of the bridge is tapered so that the bridge is smoothly connected to the upper surface of the floor slab while ensuring the above-mentioned reduction of friction. As a result, when passing through the bridge deck, it is difficult to get over the stepped portion of the taper shape, and there is a possibility that an elderly person or a person who is unaware of the stepped may fall over this stepped portion.

In consideration of the above, a step is formed on the bridge board mounting surface of the floor slab by recessing the bridge board by the thickness of the bridge board, and the bridge board is accommodated in the step. The floor slab and bridge deck can be kept on the same plane, and walking safety can be secured, but in the case of such a structure, the edge of the bridge deck collides with the end surface of the step of the floor deck during an earthquake, There is a risk of problems such as damage to this part, riding of the bridge board onto the floor slab, or falling off from the floor slab.

The present invention solves the above problems, and an object of the present invention is to keep the bridge plate and the floor slab on the same plane and to smoothly move the floor slab and the bridge slab relative to each other. It provides a bridge board structure.

[0007]

In order to achieve the above object, the present invention is a bridge board which is bridged between adjacent floor slabs, wherein a large number of small blocks are provided at both ends of the bridge board. In order to integrally provide a flexible tread plate which is rotatably connected to each other by a pin, and to make the upper surface of the floor slab and the upper surface of the tread plate placed on the floor slab a continuous flat surface. And a stepped portion which is recessed by the thickness of the tread plate, and a storage space which is formed in the floor slab so as to be continuous with the stepped portion and which stores the tread plate so that the tread plate can be retracted.

According to the above construction, the bridge board, the flexible footboard, and the floor slab are on the same plane, and it is possible to secure the walking safety of a person passing through this portion. When both floor slabs are displaced relative to each other due to an earthquake or the like and the gap spacing is expanded or contracted, the flexible treads will appear and disappear from the storage space continuous to the step according to the displacement of the slabs, and the bridge board function While maintaining, it absorbs the expansion and contraction displacement between the floor slabs without damaging the floor slabs.

[0009]

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 bridge plate 2 according to the present invention.

In the figure, on the upper surface of the front end portion of the floor slab 1 facing each other at a predetermined distance d, a step portion 1a recessed by the thickness of a flexible step plate 3 described later is formed, and this step portion 1a is formed. The flexible footboard 3 is placed on the. A steel plate material 19 or the like forming a smooth surface is laid on the upper surface of the stepped portion 1a, and a metal parting metal fitting 17 edging the end of the stepped portion 1a is provided on the inner surface of the stepped portion 1a. It is installed.

Flexible footboards 3 are integrally attached to both ends of the bridge board 2, and are installed together with the bridge board 2 on the step 1a.

This tread plate 3 is, as shown in FIGS.
A plurality of lightweight and rigid small blocks 3a made of synthetic resin or the like are integrally connected in a chain by a large number of pins 4 and are rotatably linked around the pins 4, and the length direction as a whole. Only flexibility is given.

The end of each footboard 3 is a step 1 of the floor slab 1.
It is opened below the parting metal fitting 17 at the end of a and is stored so as to be able to go in and out in a slit 1b which is a storage space inclined toward the lower side. A guide roller 5 is arranged below the slit 1b on the inlet side and is in contact with the lower surface of the step board 3. The shaft 5a of the guide roller 5 is biased upward by a spring B or the like so that the floor surface of the floor slab 1 and the tread plate 3 are always kept in the same plane at the entrance of the slit 1b.

Therefore, when the bridge board 2 moves in the left-right direction,
The footboard 3 will be retracted from the slit 1b,
A collision with the floor slab 1 is prevented.

Further, the bridge plate 2 including the step plate 3 has a step portion 1
While being guided by the parting metal fitting 17 that borders the stepped portion 1a on the upper surface of a, it is also movable in a direction orthogonal to the direction of expansion / contraction of the clearance gap of the floor slab 1.

In the installed state, the upper surface of the bridge plate 2 is flush with the floor slab 1, and by covering the upper surface with a tile carpet, the appearance continuity of the connecting portion of the bridge plate 2 to each floor slab 1 is also increased. I am holding it.

Further, a fixing plate 6 is integrally provided on the vertical surface of the tip of each floor slab 1. A groove 6a is formed in the center of the fixing plate 6 along the tip of the floor slab 1, and the end of the reinforcing body 7 is engaged with the groove 6a.

As shown in FIGS. 3 and 4, the reinforcing member 7 is provided in a pair of upper and lower sleeves 8 which are rotatably pivotally fixed to the lower central position of the bridge plate 2, and 180 ° outer peripheral positions of the respective sleeves 8. It is provided with a support arm 9 that is integrally projected, and a spring 10 that is disposed in a recess between the sleeves 8 and that biases the sleeves 8 in the reverse direction.

A boss portion 9a is integrated at the tip of each support arm 9, and a guide 11 contacting the inner depth of the recessed groove 6a is attached to the boss portion 9a via a mounting tool 12 including a bolt and a nut. It can be assembled together.

The guides 11 include vertical rollers 11 respectively.
a and the lower roller 11b are rotatably pivoted, and the vertical roller 11a is located inside the concave groove 6a, and the lower roller 1a.
1b is adapted to roll on the bottom surface of the concave groove 6a. As an alternative to such a guide 11, the tip of the support arm 9 may be made of a low friction member.

Then, the reinforcing member 7 is fixed to the bridge plate 2 by the bolt 14 inserted in the center of each sleeve 8 in the assembled state.
Is rotatably pivoted to the central position of the lower part of the
The guide 11 at the tip end is engaged and supported in the recessed groove 6a in a state of intersecting the X-shape, and the support arm 9 is expanded between the floor slabs 1 by the urging force of the spring 10.
The center position of the bridge plate 2 is always maintained at the intermediate position of both floor slabs 1, and the load applied on the bridge plate 2 can be transmitted to the concave groove 6a side through the reinforcing body 7 and the bridge plate concerned can be transmitted. 2 can be reinforced.

From this state, when the gap spacing is expanded or contracted by relative displacement of the floor slabs 1, the bridge plates 2 move relative to the floor slab 1 due to the flexible foot plates 3 protruding and retracting from the slits 1b. In accordance with the biasing force of the spring 10, the support arm 9 follows the displacement while the opening degree is enlarged or reduced, and the center position of the bridge plate 2 is moved to the center position between the floor slabs 1 and held.

In consideration of the fact that the floor slabs 1 move relative to each other in a direction parallel to each other along with the expansion / contraction displacement of the space between the floor slabs 1 as described above, the bridge plate 2 including the step plate 3 is On the stepped portion 1a formed in 1, the floor slab 1 is also moved in a direction orthogonal to the expansion / contraction displacement direction, and as a result, the bridge plate 2 moves vertically and horizontally between the adjacent slabs 1. Then, the relative displacement of the two floor slabs 1 can be absorbed.

As a result, even if the floor slabs 1 relatively move relative to each other due to an earthquake or the like, the bridge plate 2 is automatically held at the center position of the gap, so that the bridge plate 2 is not displaced or dropped. Therefore, the connection between both floor slabs 1 can be reliably maintained.

In particular, since the bridge plate 2 and the flexible tread plate 3 and the floor slab 1 can be flush with each other, it is possible to secure the walking safety of a person passing through this portion. Further, when both floor slabs 1 are relatively displaced due to an earthquake or the like and the gap spacing is expanded or contracted, the flexible footboard 3 comes in and out from the slit 1b continuous to the stepped portion 1a according to the displacement of the floor slab 1, It is possible to absorb the expansion / contraction displacement between the floor slabs 1 without damaging the floor slab 1 while maintaining the bridge board function.

[0026]

As is apparent from the above description, in the bridge board structure according to the present invention, a large number of small blocks are rotatably connected to each other by pins at both ends of the bridge board. In addition to providing a flexible footboard integrally, the floor slab,
A stepped portion that is recessed by the thickness of the stepping plate to make the upper surface and the upper surface of the treading plate placed on this continuous flat surface, and a stepped portion that is formed continuously in the floor slab to this stepped portion Since the storage space for storing freely is formed, the bridge plate and the flexible tread plate and the floor slab can be flush with each other, and the walking safety of a person passing through this part can be secured. When the floor slabs are displaced relative to each other due to an earthquake or the like, and the gap spacing is expanded or contracted, the flexible footboards withdraw from and exit the storage space that is continuous with the steps according to the displacement of the slabs, maintaining the bridgeboard function. However, it is possible to absorb the expansion and contraction displacement between both floor slabs without damaging the floor slabs, thus keeping the bridge slabs flush with the slabs and smoothing the slabs and bridge slabs. The relative movement can be secured.

[Brief description of drawings]

FIG. 1 is a partial plan view showing a bridge plate structure according to the present invention.

FIG. 2 is a sectional view of FIG.

FIG. 3 is an exploded perspective view showing details of a flexible footboard.

FIG. 4 is a partially enlarged sectional view showing a relationship between a flexible footboard and a slit.

FIG. 5 is an exploded perspective view showing a mounting relationship between a sleeve of a reinforcing body and a spring.

FIG. 6 is an exploded perspective view showing an assembly structure of a reinforcing body.

7 (a) to 7 (c) are cross-sectional views showing a structural example of a conventional bridge plate.

[Explanation of symbols]

 1 Floor slab 1a Step 1b Slit 2 Bridge board 3 Flexible footboard 3a Small block 4 pins

Claims (1)

[Claims] 1. A bridge board which is bridged between adjacent floor slabs, wherein a plurality of small blocks are pivotally connected to each other at both ends of the bridge board with flexibility. A step board is integrally provided, and the floor slab has a stepped portion which is recessed by the thickness of the step board so that the upper surface thereof and the upper surface of the tread board placed thereon are continuous flat surfaces, and the stepped portion. And a storage space that is formed continuously in the floor slab and that stores the footboard in a retractable manner.