JPH0752811Y2 - Expansion joints - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an expansion joint for covering a gap in a building, and more particularly to an expansion joint having a large strain absorption width.

[Conventional technology]

Buildings are constantly distorted due to expansion and contraction due to temperature changes, unequal settlement, earthquakes, etc., and a large structure has a gap structure for the purpose of preventing damage to the building due to the distortion. Conventionally, various expansion joints have been used as a structure for covering this gap.

In this type of conventional expansion joint, as shown in FIG. 4, a pair of frame bases 50, 50 are fixed to the ends of floors a, a ', respectively, and
A water stop plate 51 is installed at the bottom between the 50 and 50, and the frame base 50, 50
Between the upper parts of the frame bases 50, 50 connected to each other through a locking plate 52 having a W-shaped cross section, and a roller plate 53 mounted on the locking plate 52 and laid over the upper surface of the frame bases 50, 50. From fastening screw 5
5 is screwed and fastened, and strain absorbing rubbers 56 are respectively interposed between both sides of the covering plate 54 and the floors a and a '.

[Problems to be solved by the device]

However, when the width of the gap becomes wider as the size of the building becomes larger in recent years, the width of the strain absorbing rubbers 56, 56 becomes smaller in the above-mentioned configuration.
There was a problem that the width was restricted to the upper surface of 0 and the width could not be made large, and a sufficient allowable strain amount could not be obtained.

The present invention has been made in view of the above problems, and an object thereof is to provide an expansion joint that can sufficiently absorb a large strain and is excellent in workability.

[Means for solving the problem]

The expansion joint according to the present invention is an expansion joint to be installed in a gap for strain absorption of a building, and is fixed to both edges of the structure that sandwich the gap, and a cover plate supporting edge and an outside are provided on the gap side upper surface. A pair of frame bases having presser plate support edges formed on the upper surface and a cover plate support edge of both the frame bases are slidably laid between the frame bases to form a reinforcing and dividing rib projecting to the upper surface of the central portion. A cover plate, a press plate having an outer edge portion fixed to the support edge of the press plate, and covering the front surface of the frame base, and a strain absorbing rubber interposed between the split rib for reinforcing the cover plate and the press plate. And a dovetail-shaped engaging structure in which a dovetail-shaped engaging groove provided on the front surface of the cover plate is engaged with an engaging rib provided on the rear surface of the end portion of the strain absorbing rubber which also serves as a reinforcing rib. , The engaging groove formed on the edge portion of the holding plate side engages with the holding rib formed on the back surface of the inner edge portion of the holding plate, and is clamped between the covering plate and the strain plate. With mounting the yield rubber, wherein between the cover plate and the strain-absorbing rubber, in correspondence with the engaging rib or dovetail-type engagement groove in a longitudinally extending configured on the front of the cover plate,
The gist of the present invention is to construct one or a plurality of auxiliary dovetail-shaped fastening structures in which a dovetail-shaped engaging groove or an engaging projection is formed on the back surface of the strain absorbing rubber.

Further, an extension portion extending along the surface of the cover plate may be provided outside the engagement groove of the strain absorbing rubber.

[Action]

Therefore, the structure is such that it is slidably mounted on the frame base and the surface of the cover plate is covered with a strain absorbing rubber that fills the floor surface at the same level, so expansion and contraction due to temperature change of the building, uneven settlement and Large strains in the vertical and horizontal directions and the tilt direction due to an earthquake can be sufficiently absorbed, and the dovetail-shaped fastening structure between the front face of the pressing plate and the back face of the strain absorbing rubber allows it to be used even when the strain is small. There is no problem such as swelling of the strain absorbing rubber covering the surface. Further, in the above configuration, the strain absorbing rubber is divided in the width direction by forming the reinforcing and dividing rib on the upper surface of the central portion of the covering plate slidably slid between the covering plate supporting edges of both frame bases. Together with the reduction in the amount of strain applied to each strain absorbing rubber, it acts to eliminate the above-mentioned problems.

〔Example〕

An embodiment of an expansion joint according to the present invention will be described below with reference to the drawings.

1 and 2 show an embodiment of an expansion joint for floors, where reference numerals 1 and 1 are frame bases made of an aluminum form material, and a building a, which is opposed to each other with a gap, It is fixed to the step portion formed at the end of a'through fastening members such as anchor bolts 2, 2. The frame base 1 has a structure in which a cover plate support edge 4 is provided on the gap side edge of the bottom plate portion 3 and a holding plate support edge 5 is provided on the other side, and a water stop plate is provided on the opposite edge of the cover plate support edge 4. Each of the locking grooves 6 is configured. Reference numeral 7 is a cover plate made of an aluminum form material which is laid over the cover plate support edges 4 and 4 with sufficient sliding allowance in the gap width direction on both side edges. 8 and 8 are provided in a protruding manner, and a reinforcing / dividing split rib 9 is formed in the central portion so as to have a height substantially equal to the floor reference plane A. On the upper surface of the cover plate 7, there are formed dovetail-shaped engaging grooves 10, 10 which open in the upper surface direction. Reference numerals 11 and 11 are pressers made of an aluminum form material fixed to the front edge 12 of the base frame 1 by fastening screws at the outer edges with fastening screws 13 and at a height substantially matching the floor reference plane A. The plate is a plate, and a positioning rib 14 formed on the rear surface of the outer edge portion of the pressing plate 11 is engaged with the engaging groove 15 of the front edge 12 in an opposed manner, and a pressing rib 16 is formed on the inner edge. Reference numeral 17 is a strain absorbing rubber 17 formed of synthetic rubber or soft resin or the like, and has a thickness corresponding to the step difference between the covering plate 7 and the dividing rib 9 for reinforcement and has a large number of middle air chambers 18 extending in the longitudinal direction. On the rear surface side of one end of the extending and contracting portions 19 which are arranged in parallel with each other, while forming an engaging rib 20 whose cross section that engages with the dovetail-shaped engaging groove 10 is a roof blade type,
On the front surface of the other end portion, an engaging groove 21 that engages with the pressing rib 16 of the pressing plate 11 is formed. Further, on the outer side of the engagement groove 21 of the strain absorbing rubber 17, as shown by reference numeral 17 'in the drawing, an extension portion which extends along the surface of the covering plate 7 and has a bead on the edge is integrally formed. And the extended portion 17 'is provided alongside.

Further, in the present invention, in addition to the engaging structure of the central portion of the cover plate 7 composed of the dovetail-shaped engaging groove 10 and the engaging rib 20 and the end portion of the strain absorbing rubber 17, the sliding surface part of the cover plate 7 has both. Auxiliary ant type fastening structure is constructed. A center engaging rib 22 having a T-shaped cross section extending in the longitudinal direction is provided on the front surface of both sliding surfaces of the covering plate 7, and a dovetail-shaped engaging groove 23 opposed to and engaged with the strain absorbing rubber 17 is provided. The structure is configured on the back of.

If necessary, a water stop plate (not shown) may be provided between the opposed water stop plate locking grooves 6, 6.

According to the expansion joint having the above structure, the surface of the covering plate 7 is covered with the strain absorbing rubber 17, and the width of the covering plate 7 is changed, and the width of the strain absorbing rubber 17 is changed to various types. It is possible to meet the design tolerance.

That is, since the covering plate 7 is slidably laid over the covering plate supporting edges 4 and 4 of the frame bases 1 and 1, when the gaps between the buildings a and a ′ are expanded or contracted, the pressing ribs of the pressing plates 11 and 11 are pressed. The strain absorbing rubber 17 gripped between the reinforcing rib 16 and the split rib 9 for reinforcement also has a large number of middle air chambers 18.
The expansion / contraction part 19 including the expansion / contraction expands and contracts in the width direction to absorb the strain of the gap width. At this time, the strain absorbing rubber 17 has an engaging rib 20 having an arrow blade-shaped cross section and a dovetail-shaped engaging groove 10 of the cover plate 7.
Since it is engaged with, it does not spring up from the surface of the covering plate 7. In addition, in the above-mentioned structure, since the auxiliary dovetail-type fastening structure is also configured in the middle part of each strain absorbing rubber 17,17, it is useful as a structure for suppressing the jumping up in the expansion joint used especially for the structure part having a large gap. is there.

Next, FIG. 3 shows another embodiment of the auxiliary dovetail-type fastening structure which is an essential component of the present invention.

In the auxiliary dovetail-shaped engaging structure, dovetail-shaped engaging grooves 24 extending in the longitudinal direction are formed on the front surfaces of both sliding surface portions of the covering plate 7, and the dovetail-shaped engaging grooves 24 are formed.
It has a structure in which an engaging projection 25 having a thickened cross section which is opposed to and is formed on the back surface of the strain absorbing rubber 17.

[Effect of device]

As described above, the expansion joint according to the present invention has a structure in which the surface of the covering plate is covered by the strain absorbing rubber which is slidably laid on the frame base and is buried at the same level as the floor surface.
It is possible to sufficiently absorb large strains in the vertical and horizontal directions and the inclination direction due to expansion and contraction, uneven settlement, earthquake, etc. due to temperature change of the building. At this time, since the strain absorbing rubber has the dovetail-shaped engaging structure in which the engaging rib engages with the dovetail-shaped engaging groove of the covering plate, the auxiliary dovetail-type engaging structure is formed in the middle abdomen. It does not bounce upward from the surface of the cover plate. In addition, since the structure is made of aluminum pull material, it has the features of being able to achieve weight reduction and being easy to install, and the practical effects after implementing the present invention are extremely high. large.

[Brief description of drawings]

FIG. 1 is a front sectional view of an expansion joint according to a first embodiment of the present invention in a construction state, FIG. 2 is an enlarged sectional view of an essential part of the same, and FIG. 3 is another embodiment of an auxiliary dovetail engaging structure. FIG. 4 is a cross-sectional view of a main part showing an example, and FIG. 4 is a front cross-sectional view showing a conventional expansion joint. 1 ... Frame base, 4 ... Cover plate support edge, 5 ... Holding plate support edge, 7
… Cover plate, 9… Reinforcing split ribs, 10, 23, 24… Dove-shaped engaging groove, 11… Holding plate, 16… Holding rib, 17… Strain absorbing rubber, 20
... engagement ribs, 21 ... engagement grooves, 22 ... middle engagement ribs, 25 ... engagement protrusions.

Claims (2)

[Scope of utility model registration request] 1. An expansion joint to be installed in a strain absorbing gap of a building, which is fixed to each of the two a and a'edges of the building sandwiching the gap and has a cover plate support edge 4 on the gap side upper surface. , A pair of frame bases 1 and 1 having presser plate support edges 5 on the outer upper surface, and cover plate support edges 4 and 4 of both frame bases 1 and 1 slidably laid over the center, A cover plate 7 formed with reinforcing and dividing ribs 9 projecting from the upper surface of the part, a press plate 11 formed by fixing an outer edge portion to the press plate support edge 5, and covering the front surface of the frame base 1, and the cover. The plate 7 is composed of a split rib 9 also serving as a reinforcement and a strain absorbing rubber 17 interposed between the holding plates 11. A cover plate is provided with an engaging rib 20 provided on the rear surface of the strain absorbing rubber 17 at the side of the split rib for reinforcement. 7, a dovetail-shaped engaging structure formed by engaging with a dovetail-shaped engaging groove 20 provided on the front surface of 7, and an engaging groove 21 provided on the side edge of the holding plate, and a backside of the inner edge of the holding plate 11. Engages with the presser rib 16 provided In addition, the strain absorbing rubber 17 is mounted by being sandwiched between the cover plate and the cover plate 7 and the strain absorbing rubber 17, and the center engaging rib 22 extending in the longitudinal direction formed on the front surface of the cover plate 7 or Corresponding to the dovetail-shaped engaging groove 24, the dovetail-shaped engaging groove 23 is provided on the back surface of the strain absorbing rubber 17.
Alternatively, the expansion joint is characterized by comprising one or a plurality of auxiliary dovetail-type engaging structures having the engaging protrusions 25. 2. An expansion joint characterized in that an extension portion 17 'extending along the surface of the cover plate 7 is provided outside the engagement groove 21 of the strain absorbing rubber 17.