JP7201283B1 - expansion joint - Google Patents

Abstract

A substantially bellows-shaped expansion joint cover made of an elastic material is installed in a wide gap to prevent the cover from bending into the gap. A deflection restraint mechanism is installed in a gap (G) adjacent to the back surface of an expansion joint cover (2). A stretchable rod 6 is used as the deflection restraint mechanism, and is stretched in a direction slanted with respect to the width direction of the gap G so as to be bridged between the skeletons A and B and attached. [Selection drawing] Fig. 2

Description

TECHNICAL FIELD The present invention relates to an expansion joint structure that covers gaps in a structure with an expansion joint cover (hereinafter also simply referred to as "cover") made of an elastic material.

Structures (buildings) are divided into multiple frames and built with gaps between the frames to avoid the effects of temperature changes in the frames that make up them and loads applied during earthquakes. An expansion joint is installed in the gap so that even if the frames on both sides of the gap are displaced in mutually different directions while being integrally connected to each other, the expansion joints are configured to follow the deformation and absorb the stress.

The cover of the expansion joint consists of a movable mechanism that combines multiple members with a metal cover material. There is an advantage that the structure of the expansion joint is simple and the number of constituent parts is small.

In order to impart stretchability, such an elastic cover material is usually formed by providing a substantially bellows-shaped portion that is bent or curved in a corrugated cross section inside it, and is bridged between the wall surfaces of the frame on both sides of the gap. Unlike the metal cover material that covers the opening surface, the cover material is placed inside the gap and stored in the gap, so that the design of the part where the gap is provided is good ( For example, see Patent Document 1).

JP-A-2007-9449

In a gap with a width of more than 200 mm provided on the indoor wall surface of a building, when this gap is covered with the expansion joint cover made of the conventional elastic material, a person may press his or her hand against the cover or lean against the cover. It becomes possible to In such a case, if the cover is pushed by hand or leaned against it, the cover will bend under the external force, and the hand or shoulder will be immersed in the gap to some extent, causing anxiety or danger to the person pushing or leaning on it. There is a risk of making you feel.
In a mode in which the expansion joint cover is installed in a wide gap, it is necessary to take measures to suppress the occurrence of bending of the cover in the same direction when an external external force is applied to the inside of the gap from the inside of the room.

Further, when the expansion joint cover made of the conventional elastic material is increased in size, the weight of the cover itself increases with the increase in size. Therefore, in a mode in which the cover is installed in a gap provided in the ceiling surface of a building, it is inevitable that the weight of the cover itself causes the cover to sag. In the expansion joint installed in the gap of the ceiling surface, it is necessary to install the expansion joint cover by taking measures to suppress the occurrence of sagging.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems that occur when an expansion joint cover made of an elastic material is made larger than before and installed in a wide gap.

In order to solve the above-mentioned problems, the present invention provides an expansion joint covering the gap by installing an expansion joint cover formed in a substantially bellows shape using an elastic material between the skeletons facing each other across the gap provided in the structure. in
A deflection suppression mechanism is provided in the gap adjacent to the back surface of the expansion joint cover and restricts deflection of the expansion joint cover toward the back side.

According to the expansion joint configured as described above, when the frame is relatively displaced on both sides of the gap due to an earthquake or the like, the expansion cover itself, which is formed in a substantially bellows shape, expands and contracts following the displacement and elastically deforms, thereby opening the gap. can be kept closed.
As mentioned above, when an expansion joint cover is installed in a wide gap on the interior wall of a building, people may push or lean against the cover by hand. By providing a deflection suppressing mechanism on the back side, even if an external force is applied to the surface of the cover when the cover is pushed or leaned, the cover is less likely to be deflected toward the inside of the gap, and the shape at the time of installation can be maintained. The hand or shoulder pushing the cover will not be pushed into the gap due to the deflection of the cover.

The deflection suppression mechanism provided on the back side of the expansion joint cover uses, for example, an elastic rod, which is not connected to the cover main body of the expansion joint cover, but is placed horizontally between the frames along the width direction of the gap. Alternatively, it can be configured by arranging and attaching in an inclined direction with respect to the width direction of the gap.
If an expansion joint cover is installed in a gap provided in an indoor wall surface, a short child may push the cover by hand or a tall adult may lean against the cover. Since the joint cover is likely to be subjected to an external force from the room to the inside of the gap over a height of about 1500 mm from the floor surface, it is preferable to install the rod on the back side of the expansion joint cover in this range.
The rod can be installed horizontally along the width direction of the gap by connecting one end to one frame and connecting the other end to the other frame in an extended state. Alternatively, in a state in which the rod is extended while being inclined with respect to the width direction of the gap, both ends thereof can be connected to the both skeletons. A plurality of rods may be laid over the frame on the back side of the expansion joint cover at intervals in the lengthwise direction of the gap.

The rod can be installed horizontally along the gap width direction. Therefore, it is possible to reduce the elongation rate of the expansion joint cover when it is moved, so it is possible to use a rod made of a material with a small elongation rate. It can be said to be advantageous in that the load can be reduced. In addition, by arbitrarily changing the position where the rod is erected in an inclined direction , it is possible to use the same length rod for gaps with different widths, and the tensile strength (degree of elongation) can be adjusted as appropriate. can be adjusted to

For wide gaps, a plurality of expansion joint covers are connected in series between the frames to cover the gaps, and a deflection suppression mechanism is installed on the back side of the expansion joint cover in the same manner as described above. , the cover can be made difficult to bend inward in the gap.
That is, the expansion joint provided in the wide gap has a plurality of expansion joint covers arranged in series along the width direction of the gap, and ends of adjacent covers are connected to form an expansion joint cover. The connection portion between the ends of the expansion joint cover is connected to a center position holding mechanism provided on the back side of the joint cover, and the expansion joint cover is adjacent to the back side of the expansion joint cover, and the expansion joint cover is connected to the back side. It is possible to employ a configuration in which a deflection suppression mechanism for restricting deflection is provided in the gap.

In the expansion joint provided in the wide gap, when using a rod having elasticity as a deflection suppression mechanism, the rod is extended in a direction inclined with respect to the width direction of the gap, between the skeletons, or between the skeleton and the central position holding mechanism It can be installed by spanning between the center holding rod provided in the

In the expansion joint configured as described above, the expansion joint cover is attached to the frame on both sides of the substantially bellows-shaped cover main body, in which the mountain fold portion protruding to the front side of the cover and the valley fold portion protruding to the back side of the cover alternately repeat. The cover body has a flat portion at the top of the mountain fold and a thick portion at the end of the valley fold that protrudes toward the back side. A cover having a shape in which four or more valley folds protrude from the back side of the cover can be used.

The expansion joint cover can be formed with appropriate elasticity and hardness using a material having rubber elasticity, preferably a thermoplastic elastomer. As the number of mountain folds and valley folds of the cover body to be formed increases, the cover tends to sag. As a countermeasure against this susceptibility to sagging, the expansion joint cover has a mountain fold and a valley fold that have a width (Wm) of the flat portion of the mountain fold and a width (Wv) of the open end of the valley fold. is preferably formed so that the dimensional ratio (Wv:Wm) of (Wv:Wm)=0.5 to 0.7.
If the dimensional ratio (Wv:Wm) of the width (Wm) of the flat portion of the expansion joint cover and the width (Wv) of the open end of the valley fold portion is provided in the range of 0.5 to 0.7, the cover can be attached to the gap without sagging. If the dimensional ratio exceeds 0.7, sagging tends to occur due to an increase in the weight of the entire cover.

1 is a schematic external view of one embodiment of an expansion joint of the present invention; FIG. 2 is a schematic plan view of the expansion joint of FIG. 1; FIG. 2 is an end view of the expansion joint cover shown in FIG. 1; FIG. 4 is a partially enlarged view of FIG. 3; FIG. FIG. 4 is an external view of a rod for restraining cover deflection. FIG. 3 is a view of the expansion joint of FIGS. 1 and 2 as seen from inside the gap; FIG. 10 is a diagram showing an expansion joint in which a plurality of cover deflection suppression rods are installed in a gap; FIG. 4 is a schematic plan view of an expansion joint according to another embodiment of the invention; FIG. 9 is a schematic front view of the expansion joint in FIG. 8 with a cover removed;

Preferred embodiments of the present invention will be described with reference to the drawings. Note that the technical idea of the present invention is not limited to the embodiments described below.

FIG. 1 is a schematic external view of one embodiment of the expansion joint of the present invention, and FIG. 2 is a schematic plan view thereof.
The illustrated expansion joint 1 is installed at the meeting part of the inner wall surfaces of the building bodies A and B facing each other across the gap G provided on the wall surface inside the building. and the expansion joint cover 2 is bridged between the ends B1 of the frame B, and the cover 2 shields the gap G opened to the indoor side, and the inner wall surfaces A2 and B2 of the frames A and B are connected by the cover 2. , and a rod 6, which is a mechanism for suppressing the bending of the cover 2, is installed in the gap G on the rear side of the cover 2. As shown in FIG. The illustrated form shows a mode in which the gap G between the indoor wall surfaces having a gap width (Wg) of about 300 mm is covered with the cover 2, which will be described later.

More specifically, the expansion joint 1 attaches both side ends of a cover 2 which is formed to be freely stretchable in the width direction of the gap G facing the interior to the ends A1 and B1 of the frame A and the frame B facing the gap G with anchor bolts. When the gap G is covered with the cover 2 by connecting to the supporting members 3, 3 fixed by the fasteners 4 such as the cover 2, and when the skeletons A and B are relatively displaced due to an earthquake or the like and the gap G expands, contracts, or shifts, The cover 2 stretches and deforms following the displacement to absorb the displacement, and the inner wall surfaces A2 and B2 of the skeletons A and B are configured to be maintained as an integral wall surface without missing portions.

The cover 2 is a cover material made of an elastic material having a width that covers the gap G, and is a bellows-shaped cover in which mountain folds 21 protruding to the front side of the cover and valley folds 22 protruding to the back side are alternately repeated. Mounting portions 23, 23 connected to the support member 4 are provided on both sides of the main body, respectively, and are formed in a belt shape along the length direction of the gap G, that is, along the height direction of the inner wall surfaces A2, B2. .

More specifically, the cover body of the cover 2 has a flat portion at the top of the mountain bent portion 21 and a thick portion at the end of the valley bent portion 22 protruding toward the back side. It is provided in a shape in which five mountain folds 22 are arranged with a valley fold 22 interposed therebetween. 4, the width (Wm) of the flat portion of the mountain fold portion 21 and the width (Wv) of the open end of the valley fold portion of the cover 2 are measured. The dimensions are such that the ratio (Wv:Wm) falls within the range of 0.5 to 0.7. The width (Wec) between the mounting portions 23, 23 on both sides of the cover 2 is set to be approximately the same as the width (Wg) of the gap G or slightly smaller .

As shown in FIG. 5, the rod 6 is a rod-like member made of a material having rubber elasticity, preferably a thermoplastic elastomer, so as to be freely stretchable in its axial direction. Hook-shaped engaging hooks 61, 61 are integrally formed at both ends.
The rod 6 is formed to have a length slightly larger than the width of the gap G, which is about 300 mm in this embodiment, and is positioned adjacent to the rear surface of the cover 2 as shown in FIGS. , are stretched along a direction inclined to the width direction of the gap G to apply tension, and are fixed or supported to the ends A1, B1 of the skeletons A, B to the support member 3 Hooks 61, 61 are respectively engaged with connecting members 5, 5 integrated with the material 3, and attached to be bridged between the skeletons A, B while being inclined with respect to the width direction of the gap G.

The expansion joint 1 is constructed by fixing the support member 3 or the connecting member 5 integrated therewith to the ends A1 and B1 of the skeletons A and B on both sides of the gap G, respectively, and inserting the rod 6 between the connecting members 5 and 5. Attach in a direction inclined with respect to the width direction of G, then connect the attachment portions 23, 23 on both sides of the cover 2 to the support members 3, 3, and install the cover 2 between the skeletons A, B. be able to.

In order to prevent the cover 2 from bending toward the rear side, as shown in FIG. It may be constructed so as to be bridged obliquely between the skeletons A and B.

8 and 9 show a configuration in which a plurality of the covers 2 are connected in series with respect to the wide gap G and attached between the main bodies A and B. FIG. 9 shows a schematic configuration of the expansion joint 1 shown in FIG. 8 with the covers 2, 2 removed as viewed from the front.

In the expansion joint 1 shown in both figures, a supporting member 3 and a connecting member 5 are respectively fixed to the ends of the skeletons A and B facing the gap G, and the ends are connected between the supporting members 3 and 3. Two covers 2, 2 are arranged in series, and a pantograph-shaped central position holding mechanism 7 is installed between the connecting members 5, 5. Elasticity, which is a mechanism for connecting the ends of the covers 2, 2 and suppressing the bending of the covers 2, 2 between the rear side of the covers 2, 2 and the central position holding mechanism 7. A rod 6 having a is attached.
The central position holding mechanism 7 is arranged so that when the ends of the covers 2 and 2 are connected to each other and the bodies A and B are relatively displaced so as to expand or reduce the width of the gap G, the covers 2 and 2 are displaced relative to each other. In addition, it slides along the width direction of the gap G, and is provided so as to hold the connecting portion between the ends of the covers 2, 2 in the gap G at the initial position of the covers 2, 2 when they are constructed.

In this embodiment, as shown in FIGS. 8 and 9, a plurality of center position holding mechanisms 7 are provided between the bodies A and B along the length direction of the gap G with respect to the covers 2 and 2 covering the gap G. and the center of each mechanism is connected by a through member 71, and the linking member 5 is attached to the support member 3 attached to the center position holding mechanism 7, and the rod 6 has a gap width The direction is extended in an inclined direction, and is mounted across both the skeletons A and B and the connecting member 5 .

The illustrated forms of the expansion joint and the expansion joint cover are only examples, and the present invention can be applied in an appropriate form according to the indoor/outdoor installation location of the expansion joint, the size of the gap, and the like.
In the above embodiment, the expansion joint cover 2 shown in FIGS. 3 and 4 is used. may be used. In addition, although the elastic rod 6 is used as the deflection suppression mechanism, it is installed on the back side of the cover, and when an external force is applied from the surface of the cover to the inside of the gap, the deflection of the cover in the same direction is suppressed. Other configurations such as springs may be used as long as they can be suppressed.

1 expansion joint, 2 cover (expansion joint cover), 21 mountain fold, 22 valley fold, 23 mounting portion, 3 support member, 4 fixing member, 5 connecting member, 6 rod, 7 center position holding mechanism, 71 through member , A, B Frame, G Gap

Claims (3)

An expansion joint covering the gap by installing an expansion joint cover formed in a substantially bellows shape using an elastic material between the building bodies facing each other across the gap provided on the wall surface of the building interior , wherein the expansion joint Adjacent to the back surface of the cover, a deflection suppression mechanism is provided in the gap for restricting the expansion joint cover from deflecting in the same direction when the expansion joint cover receives an artificial external force inward from the inside of the gap. At the provided expansion joint,
The deflection restraint mechanism extends the both end portions of the elastic rod in a direction inclined with respect to the width direction of the gap so as not to be connected to the cover main body of the expansion joint cover and within the gap. An expansion joint characterized by having a configuration in which the expansion joint is arranged so as to extend over a height of about 1500 mm from the indoor floor surface and spans between the frames . The expansion joint cover is configured by arranging a plurality of expansion joint covers in series along the width direction of the gap and connecting the ends of the adjacent covers, and the center position provided on the back side of the expansion joint cover. 2. The expansion joint according to claim 1, wherein the expansion joint cover has a structure in which connecting portions between the ends of the expansion joint cover are connected to a holding mechanism. In the expansion joint according to claim 1 or 2,
The expansion joint cover is formed by providing mounting portions to the frame on both sides of a substantially bellows-shaped cover body in which a mountain fold portion protruding to the front side of the cover and a valley fold portion protruding to the back side of the cover are alternately repeated. ,
The cover body has a flat portion at the top of the mountain fold and a thick portion at the end of the valley fold that protrudes to the back side. An expansion joint characterized by having a shape in which the above-mentioned valley fold portion protrudes.

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