JPH0573107U - Expansion joints - Google Patents

Abstract

(57) [Summary] [Purpose] It is an object to provide an expansion joint having excellent sound insulation. [Structure] The first body 1 and the second body which face each other with a gap 3 therebetween
A cover plate 11 covers the space between the skeletons 2. Between the first body 1 and the second body 2 on the back surface side of the cover plate 11, a pair of rubber or plastic inner water stop plates 22 and outer water stop plates 23 that double-shield the space 3 are interposed. A void layer P is provided between the inner and outer water stop plates 22 and 23.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to expansion joints.

[0002]

[Prior Art]

 Conventionally, the expansion joints provided in the space between the opposing skeletons have the function of being able to follow the relative displacement of the two skeletons due to an earthquake etc. by expansion or contraction of the expansion joint. It was Moreover, when sound insulation performance is required, it was very difficult to construct.

[0003]

[Problems to be solved by the device]

 However, conventional expansion joints have only the above-mentioned functions, and none of them also have a high sound insulation performance that is easy to install.

Therefore, an object of the present invention is to provide a lightweight expansion joint which is easy to install and has excellent sound insulation.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention covers a space between a first body and a second body which face each other with a gap, and covers the first body and the second body on the back surface side of the cover plate. A pair of flexible inner and outer water stop plates that double-shield the gap portion are interposed between the skeletons, and a void layer is provided between the inner and outer water stop plates.

[0006]

[Action]

 In the expansion joint configured as described above, not only the water blocking effect but also the excellent sound insulating effect can be obtained by the double inner and outer water blocking plates provided with the void layer.

[0007]

Embodiments The present invention will be described in detail below with reference to the drawings illustrating embodiments.

In FIG. 1, reference numerals 1 and 2 denote a first body and a second body that face each other with a gap 3 between them. Fasteners such as bolts are attached to the corners 4 and 5 of the first and second bodies 1 and 2, respectively. Thereby, the edge members 6 and 6 made of the metal mold material are fixed.

The edge member 6 includes a dovetail-shaped packing holding piece portion 7, a longitudinal groove 8 that opens inwardly of both the skeletons 1 and 2, and an inclined outer water stop plate holding piece portion 9. , And a packing 10 is fitted to the packing holding piece 7.

Reference numeral 11 denotes a cover plate that covers the space between the first body 1 and the second body 2, and shields the gap portion 3 by covering it from the outside.

Sealing materials 12 are attached to both end edges of the cover plate 11 and are in close contact with the outer wall surfaces of the first and second bodies 1 and 2.

Reference numeral 13 denotes a bridging rod body having a substantially U-shaped cross section for supporting the cover plate 11. Engaging projections 14, 14 rotatably attached to both ends of the bridging rod body 13 have longitudinal grooves. 8 and 8 are slidably engaged.

In the normal state where the first and second skeletons 1 and 2 are not displaced, the bridging rod 13 is inclined when viewed from the back surface side of the cover plate 11 (that is, both ends of the bridging rod 13 are shown in FIG. In a state of being vertically displaced in the direction orthogonal to the drawing), the connector 15 swingably attaches to the cover plate 11.

The connector 15 includes a bolt 16 inserted through the through holes of the cover plate 11 and the bridging rod body 13, a washer 17, and a cylindrical spacer 18 that abuts against the back surface of the cover plate 11 and the front surface of the bridging rod body 13. And a U-shaped spring holder 20 to which a nut member 19 is fixed, and an elastic member 21 such as a coil spring.

The washer 17, the spacer 18, and the elastic member 21 are externally fitted to the shaft of the bolt 16, and the bolt 16 is screwed to the nut member 19, and the back surface of the bridging rod 13 and the spring. An elastic member (21) is interposed between the bottom surfaces of the holder (20) to elastically pull the bridging rod (13) and the cover plate (11) together.

As a result, even if the first and second frames 1 and 2 are relatively displaced in the direction of arrow A due to an earthquake or the like, the inclination angle of the bridging rod 13 is changed around the connector 15. (That is, rotate around the connector 15) to follow the fluctuation.

Further, even if the first and second skeletons 1 and 2 are relatively displaced in the direction of the arrow B, the bridging rod 13 and the cover plate 11 can oscillate and follow the fluctuations. Even if the second frames 1 and 2 are displaced relative to each other in the direction orthogonal to the drawing in FIG. 1, the engagement protrusions 14 and 14 can slide in the longitudinal grooves 8 to follow the fluctuation.

By the way, between the first and second skeletons 1 and 2 on the back surface side of the cover plate 11, a pair of flexible inner water stop plates made of rubber and / or plastic that shields the gap portion 3 from inside to outside. 22 and an outer water stop plate 23 are interposed.

Both ends of the inner water blocking plate 22 are sandwiched between the edge members 6 and 6 and the corner portions 4 and 5 with an angle member or the like interposed therebetween, and both edge portions 26 and 26 of the edge members 6 and 6 are connected to each other. Both edge portions 27, 27 of the inner water stop plate 22 are in close contact with an angle material or the like. It should be noted that, although not shown, preferably, a butyl tape is interposed between the angle member and the both edge portions 27, 27 of the inner water blocking plate 22 to improve airtightness and tightly adhere. When the angle member is not present at the corners 4 and 5, it is preferable to thicken the butyl tape to absorb the unevenness of the first and second skeletons 1 and 2.

Further, the engaging projections 24, 24 of the outer water stop plate 23 are fitted into the locking recessed grooves 25, 25 formed at the tips of the outer water stop plate holding pieces 9, 9 to provide the outer stop. Both edge portions of the water plate 23 are brought into close contact with the outer water blocking plate holding pieces 9, 1.

The inner and outer water stop plates 22 and 23 are each curved inward with a predetermined curvature, and a void layer P is provided between the inner and outer water stop plates 22 and 23 at a predetermined interval C. The material of the inner and outer water stop plates 22 and 23 is preferably PVC, CR, or elastomer. Furthermore, a special isoprene-based rubber that absorbs vibration by instantaneously converting it into heat energy is desirable.

The inner and outer water stop plates 22 and 23 are thin, and their thickness dimension T is set to, for example, 0.6 to 1.2 mm.

The inner and outer water stop plates 22 and 23 not only function as normal water stop plates, but also have a sound insulating function by being doubled, and have the sound insulation performance of FIG. ing . The graph of transmission loss in FIG. 2 shows the case where the thickness dimension T of the inner and outer water blocking plates 22 and 23 is 0.8 mm.

In FIG. 3, although the outer water blocking plate is the same, when lead is used as the material of the inner water blocking plate as a heavy metal and the thickness dimension T of the inner water blocking plate is set to 1 mm (generally, In order to improve the sound insulation performance, it is necessary to increase the weight like lead).

The larger the value of this transmission loss, the higher the sound insulation performance. However, comparing FIG. 2 and FIG. 3, in the range where the frequency exceeds 500 Hz, the transmission loss of FIG. 2 and FIG. As shown, it can be seen that the sound insulation performance is comparable.

In the sound in the audible range of the human ear, the problem of sound insulation is in the mid-range or higher (usually, the sensitivity of the ear increases as the frequency increases, and the sensitivity is highest at 3 to 4 kHz). Therefore, a high sound insulation performance in the low sound range is not necessary so much even if the sound has a low sound pressure level.

Therefore, with the structure of the inner and outer water stop plates 22 and 23 of the present invention shown in FIG. 1, it is possible to exhibit the sound insulation effect which is excellent in sound insulation performance and is not inferior to that of FIG. Since 23 is an elastomer sheet and / or a plastic sheet, it is lightweight and extremely easy to mount.

If the space C between the air gap layers P shown in FIG. 1 is insufficient, the sound insulation performance may be improved due to the relationship between the air layer in the air gap layer P, the resonance of the inner and outer water stop plates 22 and 23, the wavelength of sound, and the like. Therefore, set the distance C to the range of 25mm to 60mm.

Further, since the expansion joint of the present invention has a structure in which a gap is unlikely to occur, sound is not leaked and sound insulation performance is good.

[0030]

[Effect of the device]

 Since the present invention is constructed as described above, it has the following great effects.

High sound insulation performance can be realized by the flexible rubber and / or plastic inner and outer water stop plates 22 and 23, and the inner and outer water stop plates 22 and 23 are lightweight, which makes the installation extremely easy. .. It is particularly suitable for buildings and the like that require weight reduction.

[Brief description of drawings]

FIG. 1 is a front sectional view showing an embodiment of the present invention.

FIG. 2 is a graph showing transmission loss of the present invention.

FIG. 3 is a graph showing transmission loss of a comparative example.

[Explanation of symbols]

 1 1st skeleton 2 2nd skeleton 3 Spacing part 11 Cover plate 22 Inner water stop plate 23 Outer water stop plate P Void layer

Claims (1)

[Scope of utility model registration request] 1. A cover plate (11) covers a space between a first body (1) and a second body (2) that face each other with a spacing portion (3) between them.
Between the first body 1 and the second body 2 on the back side of the cover plate 11, a pair of inner and outer water stop plates 22 and 22 made of rubber and / or plastic that double-shields the gap 3 is provided. Board
An expansion joint, wherein 23 is interposed and a void layer P is provided between the inner and outer water stop plates 22 and 23.