KR101650365B1 - An Expansion Joint Filler - Google Patents

Abstract

The present invention relates to a dual expansion joint device capable of reducing a crack generated during concrete construction. Specifically, multiple fixing rod shafts are vertically installed on the floor surface, and concrete is placed. A connection unit is inserted into the fixing rod shaft, and a dual joint member with a cover unit (joint display) capable of being attached and detached is connected and installed between the connection units before the concrete is cured. The concrete is placed on the floor surface, and an inclination height is controlled while the dual joint member is installed along an inclination of the floor surface. Therefore, construction periods are remarkably reduced. Also, the crack generated when the concrete is cured is induced to be minimized by the joint member. Therefore, the dual expansion joint device can improve durability of the concrete and construction efficiency.

Description

An Expansion Joint Filler for Concrete Crack Induction

The present invention relates to an expansion joint apparatus for reducing cracks generated during concrete construction, and more particularly, to a construction for installing a plurality of vertical fixation rod axes on a floor surface, placing concrete thereon, (Joint marking) means for inserting and detaching the connecting means between the connecting means is provided so that the double jointing member can be connected before the concrete is cured, It is possible to adjust the inclination height of the double joint members in accordance with the slope gradient of the concrete, thereby drastically reducing the construction period and at the same time, inducing the joint members to reduce the cracks generated in concrete curing to a minimum, Concrete that can enhance durability and improve construction efficiency How to install the rack induced expansion joints for double and relates to the device.

Generally, concrete is used when the roof slab, road, ground or underground parking lot of various buildings such as an apartment or a building is packed, or when a flat groove of a railroad station or a roadbed of a subway is packed.

When concrete is applied with concrete as described above, in the course of curing concrete containing cement, sand, gravel, and water, moisture in the concrete evaporates and a clearance is formed in a minute space occupied by water. And cracks (cracks) are generated from the gaps due to repeated thermal contraction and expansion.

When cracks are generated in concrete, moisture enters into cracks and causes various adverse effects on buildings.

Therefore, in order to prevent or suppress the occurrence of cracks, a method of constantly inducing cracks in the concrete is taken into consideration, in consideration of cracks occurring in proportion to the construction area of the concrete.

In order to induce cracks in the concrete during construction of the concrete in such a manner, it is necessary to install an expansion joint joint at regular intervals at the time of concrete pouring or to dry the concrete before the concrete is cured, The concrete surface is cut horizontally and vertically using a cutting machine.

The conventional expansion joint absorbs the expansion and contraction of concrete according to the temperature change of the outside air, so that the crack generated by the expansion and contraction of the concrete is uniformly guided along the expansion joint, thereby weakening the durability of the concrete by unexpected cracking And to prevent it.

The above-described conventional expansion joint members are constructed in various forms.

Examples of typical conventional expansion joints include 'expansion joint structure for concrete slabs and construction method thereof' of Patent No. 10-0542380, and 'expansion joint joints for concrete slabs' of Registration No. 10-0385130.

Hereinafter, the 'expansion joint structure for a concrete slab and the construction method thereof' of the above-mentioned Japanese Patent No. 10-0542380 will be described.

A concrete slab expansion joint structure for protecting a waterproof layer on a roof of a building or the like, comprising: a heat insulation expansion joint (200) arranged in a lattice on an upper part of the waterproof layer (120); A push concrete 130 cured by being pushed together with the wire mesh 132 on the waterproof layer 120 and the heat insulating expansion joint 200; A backup material 150 inserted into the cutting portion 220 cut from the pressed concrete 130 on the heat insulating material expansion joint 200 after curing of the pressed concrete 130; And a sealant (160) provided on the backup material (150).

The present invention also relates to a concrete slab expansion joint construction method for protecting a waterproof layer on a roof of a building or the like, comprising the steps of: (a) disposing a heat insulating expansion joint 200 having a lattice on the waterproof layer 120; (b) laying a wire mesh (132) on the waterproof layer (120) and the heat insulating expansion joint (200); (c) placing and curing press concrete 130 on the waterproof layer 120 and the heat expansion joint 200; (d) cutting the pressed concrete (130) on the heat insulating expansion joint (200) after curing the pressed concrete (130) to form a cutting part (220); (e) inserting a backup material (150) into the cutting portion (220); And (f) inserting a sealant 160 on the upper portion of the backup material 150 to finish the concrete slab joint.

This is accomplished by installing a thermal expansion joint at the top of the waterproof layer, curing the concrete by pouring the concrete, inserting the backing material and sealant into the cutting part by cutting a part of the pressed concrete at the upper part of the thermal expansion joint, ≪ / RTI >

KR 10-0385130 (registration number) 2003.05.12. KR 10-0542380 (registration number) 2006.01.03. KR 20-0129425 (registration number) 1998.08.19.

However, in the conventional 'expansion joint for concrete slabs' as described above, the connecting member is provided on the supporting member provided on the supporting part, and the connecting member is provided with the buffer part composed of the supporting part and the spring so as to correspond to the expansion and contraction of the concrete And the concrete is prevented from cracking. Such a structure has a problem in that the structure is complicated, the manufacturing cost is increased, and the economical efficiency is low.

In addition, since the conventional joint members are installed by mounting the concrete on the floor before installing the concrete, the position of the joint member may be deformed or buried when the concrete is poured.

Further, in the case where the bottom surface of the conventional joint member is inclined toward the drain port, if the joint member having the same height is installed after the concrete is laid, the height of the joint member becomes high and the height of the joint member becomes low, Problems will arise.

Therefore, when the concrete is laid on the inclined bottom surface of the conventional joint member, it is necessary to prepare various kinds of joint members having different heights.

Also, since the conventional joint members must be fixed on the floor before installing concrete, there is a disadvantage that the work and the cost are increased and the construction time is prolonged.

Accordingly, the present invention has been made to solve the above problems,

It is possible to reduce the construction period of concrete by installing the concrete joint on the bottom surface at the same time as the joint member can be installed. At the same time, it can induce the concrete cracking caused by the joint member to be minimized, The present invention provides a method of installing a new joint for guiding concrete cracks and an expansion joint device.

Another object of the present invention is to provide a double joint member in which a height of both sides can be adjusted differently by using a single member by placing a concrete on a floor surface inclined to a drain hole side, In order to make it possible to increase it.

According to an aspect of the present invention, there is provided an expansion joint apparatus for installing a concrete on a bottom surface for guiding cracks,

A fixed rod pin shaft having a plate portion fixed to a bottom surface on which concrete is placed and a rod shaft pin portion vertically installed on the upper surface of the plate portion, the fixed rod pin being mounted on the fixed rod pin; And a joint member fixed to the joint plate by connecting the joint members to each other while being inserted into the blade plate of the joint plate. Wherein the wing plate provided on the joint member has a front plate and a rear plate formed in a pair so as to be spaced apart from each other to form a space portion, one end of which is connected to the fitting pipe and the other end thereof is opened , And the joint member has both ends connected to the front plate A lower head support portion which is inserted into the space portion formed by the rear plate so as to be installed therein and an upper head portion which communicates with the upper end portion of the lower support portion and is gradually widened toward the upper end portion, And a joint display portion formed in a reverse trapezoidal shape of a top of the upper arm which is inserted into the head so as to be able to be mounted and unloaded, and the lower support portion is double- And embossing protrusions of a convex shape are formed on both sides of the paper sheet.

The method and apparatus for installing a new concrete joint for guiding concrete cracks according to the present invention can significantly reduce the time required for concrete construction by fixing the rod axle at regular intervals on the floor surface where the concrete is to be installed, It is possible to construct it at a low cost and it is advantageous in economy.

Further, according to the present invention, the connecting means is inserted into the rod shaft fixedly installed on the floor, and the joint member can be installed to the connecting means, so that the joint member can be easily and easily installed.

In addition, the present invention has an effect of preventing the concrete from cracking by making the inside of the joint member hollow, absorbing the amount of elongation and contraction of the concrete, There is also an advantage of being cheap.

In addition, the present invention can be configured to have various shapes such as a rectangular shape, a triangle shape, or a tee shape so as to quickly cope with the environment of the floor on which the joint member is installed, The interior of the floor can be varied by giving a color.

In addition, the present invention can also be constituted by an joint lid (display part) for detachably attaching the upper side of the joint member, thereby improving the sealing efficiency by removing the joint lid and installing a sealing means such as silicone when necessary.

In addition, the present invention can dramatically improve the installation efficiency by constructing double joint members so that the height of both sides can be adjusted differently by using a single member when the concrete member is installed on the inclined bottom surface inclined toward the drainage port side There are advantages.

In addition, the present invention has the effect of improving the durability because the shape of the side cross section after the work is entirely in the shape of a 'V' so that there is little edge breaking phenomenon.

1 and 2 are perspective views of a double expansion joint apparatus for introducing concrete cracks according to the present invention,
3 is a schematic perspective view of a double expansion joint apparatus for introducing concrete cracks according to the present invention,
FIG. 4 is a cross-sectional view of a state where concrete is laid in a state where a double expansion joint apparatus for introducing concrete cracks according to the present invention is installed,
FIG. 5 is a schematic diagram of a main part of a double expansion joint apparatus for guiding concrete cracks according to the present invention,
FIG. 6 is a schematic diagram showing various connection means constituting the double expansion joint apparatus for guiding concrete cracks according to the present invention, and FIG.
FIG. 7 is a cross-sectional view of a double expansion joint apparatus for guiding concrete cracks according to the present invention installed on an inclined plane.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 1 to FIG. 5, the double expansion joint apparatus 100 for cracking concrete according to the present invention comprises:

A plurality of fixed rod axial pins 110 fixedly installed at a predetermined interval on a floor surface where concrete is placed,

A joint member 120 including a fitting pipe 121 and a plurality of vane plates 122 disposed along the circumferential surface of the fitting pipe 121 so as to be inserted into the fixed rod shaft pin 110, , And

And a joint member 130 fixed to the joint member 120 by being connected to the joint member 120 while being inserted into the vane plate 122.

When concrete is placed on a large floor surface such as an underground or ground parking lot or a roof of a building so as to maintain the bottom surface firmly, water is evaporated as concrete to be laid is cured, and irregular In order to prevent cracks, concrete is installed by installing a new joint that can induce cracks during concrete construction.

 Therefore, the double expansion joint apparatus 100 according to the present invention is installed on the bottom surface to suppress the occurrence of cracks during the concrete construction.

The fixed rod shaft pin 110 includes a plate portion 111 fixed to the bottom surface and a rod shaft pin portion 112 fixed to the upper surface of the plate portion 111 in a vertical direction.

Therefore, the plate portion 111 is fixed to the bottom surface of a building or the like to be installed using an adhesive means such as mortar, bond, or the like.

Then, the rod shaft pin portion 112 provided on the upper surface of the plate portion 111 can be fixed while being installed perpendicular to the bottom surface.

Here, the rod shaft pin 112 may have an antenna structure capable of adjusting its length while being expanded and contracted in multiple stages.

Accordingly, the length of the rod shaft fin 112 can be increased or contracted according to the thickness of the concrete applied to the bottom surface of the building.

The vane plate 122 provided on the joint member 120 has a front plate 122a and a rear plate 122b which are spaced apart from each other to form a space portion 122c, Is closed while being connected to the fitting tube (121), and the other side portion is opened.

A plurality of wing plates 122 are installed along the outer circumferential surface of the fitting pipe 121 and the angle between the wing plates 122 is 90 degrees to form the rectangular joint member 120 The joint member 120 may be formed in a triangular shape at intervals of 120 degrees.

As described above, the joint member 120 can be formed in various shapes such as a rectangular shape, a triangular shape, a T shape, a Y shape, and a " shape " by adjusting the number and angle of installation of the vane plate 122 .

The joint member 130 is made of a flexible material such as a PVC material and has both ends inserted into the space portion 122c formed by the front plate 122a and the rear plate 122b An upper head portion 132 connected to the upper end portion of the lower holding portion 131 and wider in width toward the upper end portion of the lower head portion 131, And an inverted trapezoidal shape joint display part 133 inserted in such a manner as to be removably mountable on the upper panel 132.

The upper end of the upper head 132 is formed with protrusions 132a protruding upward and bent at the ends of the upper end of the upper head 132. The upper surface of the upper head 132 is formed with protrusions And the concave groove portion 132b is formed by the concave groove 132a.

The joint display 133 is formed with a fitting groove 133a for supporting the protrusion 132a while inserting the protrusion 132a.

Therefore, when the protrusion 132a is inserted along the fitting groove 133a, the joint display part 133 can be fixed to the upper head part 132.

When the joint display part 133 is inserted into the upper head part 132 and the joint display part 133 is pulled upward from one side of the joint display part 130 as described above, The joint display portion 133 can be easily detached from the upper head portion 132 by being elastically deformed and being able to be detached from the fitting groove 133a.

This is because when the side of the joint display part 133 is cracked due to the shrinkage of the concrete during concrete curing, the joint display part 133 is detached as described above, and a joint display part having a larger gap size is installed, Sealing means is applied to the recessed portion 132b formed on the upper surface of the upper head portion 132 in a state in which the joint display portion 133 is removed or the joint display portion 133 is detached, .

If the joint display part 133 is detached, the corners of the concrete are formed more than right angles, so that there is no breakage of the corner parts, so that the durability of the corner part of the concrete is improved. That is, after the work, the shape of the side end face becomes 'V' shape as a whole, so that there is little edge breaking and durability is improved.

A wing protrusion 131a for preventing the joint member 130 from being pushed up to the upper side while the concrete is expanded and contracted when inserting into the concrete inserted in the side portions of the lower support portion 131 forming the joint member 130, Respectively.

The lower end of the lower support part 131 forming the joint member 130 is formed as an insertion part 131b having a sharp end like a cone shape.

The lower support part 131 is provided with a lower double support member 140 on the outer side of the lower support part 131. Embossed projections 131c are formed on both sides of the lower support part 131, And the lower double support member 140 is formed with a bending support portion 141 that can be elastically supported by the embossing protrusion 131c at its upper end portion and is provided with a cone And an external insertion portion 142 having an end portion sharp like a shape.

Accordingly, the edge of the bending support part 141 is supported by the embossing protrusion 131c, and the height at which the lower double support member 140 is inserted into the lower support part 131 gradually decreases from one end to the other end Can be formed.

That is, as shown in FIG. 7, the bottom of the underground parking lot where the drain hole is formed is laid so that the concrete is downwardly sloped toward the drain hole. At this time, the joint member 130 is installed as a double joint member while inserting the lower double support member 140 into the lower support portion 131, h1 is formed such that the bending support portion 141 is supported by the embossing protrusion 131c formed at the bottom row of the lower support portion 131 and the lower portion h2 of the bottom surface of the lower support portion 141 is supported by the lower support portion 131 to lower the embossing protrusion 131c formed on the upper side row so that the bending support portion 141 is supported.

Therefore, the joint member 130 can be installed so as to be gradually lowered from the higher side to the lower side of the slope of the bottom surface when the concrete is laid.

As a result, the joint member 130 can be constructed in a single type and can be installed in a place having a different gradient, so that various kinds of joint members are not needed, which improves construction efficiency and economy.

Hereinafter, a method of installing the double expansion joint apparatus 100 for concrete cracking according to the present invention will be described.

First, a plurality of the fixed rod shaft pins 110 are placed and fixed at a predetermined interval using a bonding means such as a mortar, a bond or the like on the bottom surface of the concrete. Fixedly arranged)

At this time, since the area of the plate portion 111 is large, it can be easily attached to the bottom surface by the adhesive means. Further, the rod-side fin portion 112 is stretched and installed according to the thickness of the concrete to be applied at this time.

In this case, a position for fixing the fixed rod shaft pin 110 is designed in advance and its position is displayed.

Then place the concrete on the floor (step of casting the concrete).

At this time, only the rod shaft pin 112 is visible while the plate portion 111 is locked in the concrete. Here, the fixed rod shaft pin 110 may be elongated to adjust to the thickness of the poured concrete.

The joint member 120 is inserted into the rod shaft pin part 112 when the concrete is in a mortar form before the concrete is cured. (In the mortar concrete, the joint member 120 is fixed to the fixed rod shaft pin 110, (Not shown)

Since the plate portion 111 is not visible and only the rod pin shaft portion 112 is visible in the state where the concrete is placed on the bottom surface of the rod shaft pin portion 112, when the fitting pipe 121 is inserted into the rod shaft pin portion 112, The joint member 120 is installed on the fixed rod shaft pin 110.

The lower double support member 140 doubly inserted into the lower support portion 131 is pressed between the joint members 120 when the concrete is in the mortar form before the concrete is cured, 122b of the joint member 120 and between the joint member 120 adjacent to the joint member 120 and the joint member 120 formed in the mortar concrete. 130)

At this time, the lower double support member 140 installed in the lower support portion 131 pushes the outer inserting portion 142, which is formed at the lower end of the lower double support member 140, into the mortar-shaped concrete, which is very easy to install.

At this time, the joint member 130 is composed of a double joint member while inserting the lower double support member 140 in the lower support part 131, and the joint part 130 is formed at a place (h1) The bending support portion 141 is supported on the embossing protrusion 131c formed at the bottom row of the lower support portion 131 and the lower portion h2 of the bottom of the lower support portion 131 is supported by the lower support portion 131 The embossing protrusion 131c formed on the upper side row is installed so as to support the bending support portion 141 so that the height of the joint member 130 gradually decreases from the higher side to the lower side of the bottom surface.

In this case, even if the concrete shrinks at the time of curing by the wing protrusions 131a formed on both side surfaces of the lower support portion 131, the concrete is not pushed up to the upper side.

Also, at this time, the joint member 130 is pressed and pressed so that the upper surface of the joint display unit 133 and the concrete surface become the same.

After the concrete is cured, the floor construction will be completed. (Concrete curing step)

When the joint member 130 is pressed by the contracting force of the concrete, the joint member 130 is made of a stretchable material, and the interior of the joint member 130 is made of elastic material. So that the expansion and contraction of the concrete can be suppressed or induced by absorbing the space portion of the concrete.

In addition, a gap may be generated on the outer surface of the joint display part 133 provided on the joint member 130 while the concrete shrinks. In this case, the joint display part 133 is pulled up and removed, The gap can be removed (buried) by inserting and mounting it into a larger joint display portion.

By doing so, it is possible to prevent a gap formed by the joint member 130 from being penetrated into the concrete.

If necessary, the joint display part 133 may be pulled up and removed, and then a sealing member such as silicone may be applied to the recessed part 132b formed on the upper surface of the upper head part 132 and sealed.

In the present invention, the joint display portion 133 may be decorated with various colors or shapes so that various colors or shapes can be displayed on the floor surface, thereby finely decorating the floor surface.

As described above, according to the present invention, there is provided a method for installing a double expansion joint for concrete cracks and a device for installing the same, wherein a plurality of fixing rod axes are vertically installed on a floor surface, concrete is inserted, (Joint display) means for allowing the concrete to be inserted and removed between the concrete and the concrete, so that the concrete can be installed before the concrete is cured, so that the concrete is placed on the floor and a double joint It is possible to adjust the height while installing the member, which can drastically reduce the construction time of concrete. At the same time, it can induce the concrete cracking caused by the joint member to be minimized, thereby enhancing concrete durability and improving the construction efficiency. .

100: Extension joint device for concrete crack induction
110: stationary rod shaft pin 111: plate portion 112: rod shaft pin portion
120: joint member 121: fitting installation tube 122: wing plate
122a, a front plate 122b, a rear plate 122c,
130: joint member
131: lower support portion 131a: wing protrusion 131b: insertion portion 131c: embossing projection
132: upper head portion 132a: projecting portion 132b:
133: Joint display part 133a: Fitting groove
140: lower double support member 141: bending support part 142: outer insertion part

Claims (4)

The present invention relates to an expansion joint apparatus for installing a concrete on a floor surface to guide a crack,
A fixed rod pin shaft having a plate portion fixed to a bottom surface on which concrete is placed and a rod shaft pin portion vertically installed and fixed to an upper surface of the plate portion,
A joint member composed of a fitting pipe and a plurality of vane plates provided along the circumferential surface of the fitting pipe so as to be inserted and fixed in the fixed rod axial pin;
And a joint member fixedly connected to the joint member while being inserted into the vane plate of the joint member,
The wing plate provided on the joint member has a structure in which a front plate and a rear plate are paired and spaced apart to form a space portion, one end of which is connected to the fitting pipe and the other end thereof is opened ,
The joint member has a hollow lower support portion which is inserted into the space portion formed by the front plate and the rear plate and has both ends communicated with the upper end of the lower support portion, And a joint display unit having an inverted trapezoidal shape of a top of the upper beam which is inserted into the upper head to be detachable and attachable to the upper head,
Wherein the lower support portion is formed with a lower double support member on the outer side thereof, and a convex embossing protrusion formed on both sides of the lower support portion in a transverse direction and multiple rows is formed.
The method according to claim 1,
Wherein an upper end portion of the lower double support member is provided with a bent support portion that can be elastically supported by the embossing protrusion and an outer insertion portion having a tip end is formed at a lower end portion thereof.
A method of installing a double expansion joint apparatus for installing a concrete on a floor surface to guide a crack,
Fixing and fixing the fixing rod pin pin while fixing the plate portion to the bottom surface by the bonding means;
Pouring concrete on a bottom surface of the fixed rod shaft pin;
Fixing the joint member in the form of mortar by fitting the joint rod to the fixed rod shaft pin before the concrete is cured;
Before the concrete is cured, the lower support portion of the joint member and the lower double support member inserted in the mortar form are pressed to be inserted into the space portion formed between the front plate and the rear plate of the joint member, Wherein a height h1 of the bottom surface on which the concrete is placed is supported by the embossing protrusion formed on the lower side row of the lower support portion so that the bent support portion formed on the upper end of the lower double support member is supported, The low height portion h2 is installed such that the folding support portion is supported by the embossing protrusion formed on the upper side row by pressing the lower support portion so that the height of the joint member gradually decreases from the higher side to the lower side of the bottom side Installation of a double expansion joint for guiding concrete cracks including step Law.
The method of claim 3,
Further comprising the step of removing a joint display portion provided at an upper head portion of the joint member and injecting a sealing means to an upper surface of the upper head portion.

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