KR20130037461A - An apparatus of fixing for dowel-bar using expansion joint board - Google Patents

Abstract

PURPOSE: A dowel-bar fixing device for an expansion joint board is provided to cast concrete with various spans by maintaining a regular gap between expansion joints and to accurately fix a dowel-bar to a predetermined spot. CONSTITUTION: A dowel-bar fixing device for an expansion joint board comprises a dowel-bar insertion pipe(110) and a dowel-bar fixing cap. The dowel-bar fixing cap prevents the detachment of a dowel-bar(80) which is installed at one side of the dowel-bar insertion pipe. A fixing device inside dowel-bar insertion pipe comprises a male socket and a female socket. One side of the upper and lower parts of the fixing device has an expansion joint board for forming an expansion joint.

Description

Dowel-bar using expansion joint board {An apparatus of fixing for Dowel-bar using expansion joint board}

The present invention relates to a dowel bar fixing device for expansion joints, and more specifically, expansion and contraction in the concrete expansion joint to prevent damage due to cracking and rupture due to shrinkage and expansion phenomena according to the temperature change of the concrete structure Dowel bars of expansion joints that can be fastened to the drinking plate by the hydrogen and cowckets of the dowel bar fixing device to fix the dowel bars, maintain the expansion joint at regular intervals, and pour a large number of concrete parts or simultaneously. It relates to a fixing device.

In general, in the case of large concrete structures such as large buildings, bridges, retaining walls, highway pavement, etc., there is a risk that cracks and breakage may occur due to stress acting on the structure by various causes such as ground subsidence, earthquake and temperature change. Therefore, in drying such large structures, it is essential to minimize the occurrence of defects such as cracks by placing expansion joints at regular intervals to smoothly cope with changes in expansion and contraction of joints.

Therefore, concrete structures are installed with expansion joints at regular intervals, and expansion joint plates and dowel bars are installed at regular intervals in order to cope with elongation, contraction, and differential settlement according to temperature change and differential settlement. It is being legalized to construct.

1A to 1C show a perspective view of a retaining wall, a channel, a waterway, and a pavement, in which a conventional expansion joint is installed, in a direction perpendicular to the longitudinal direction of the structure 20 in which concrete is poured. By placing the expansion joint portion 30 at regular intervals, the expansion joint plate and the dowel bar 80 are constructed to cope with elongation, contraction, and unequal settlement.

Conventionally, as shown in FIG. 2, the dowel bar 80 and the dowel bar cap 90 of the expansion joint part 30 installed on the structure 20 for the same purpose as described above are installed in one direction at a predetermined interval in the center of the concrete cross section. , This is a problem that can not be placed at one time over the entire length when placing concrete to form the structure by installing the dowel bar 80 in the expansion joint portion (30). That is, looking at the conventional method and procedure of concrete casting, as shown in Figure 4 (A) the expansion joint portion 30, the dowel bar (80) has a length that is placed as long as the section (40) After pouring, ① the concrete 40 poured into the structure 20 of the section is cured and then moved while moving to the following ②, ③, ④ .. section.

In addition, another method, which is applied when there is a space or a long space for installing the structure, as shown in (B), there is a method for pouring in two stages, which is the expansion joint 30 30 dowel bar (80) After placing the space as much as the length of the middle in the middle of the first installation, and when the first poured concrete is cured, the concrete is poured in a way to complete the structure 20 by secondary casting in the empty space.

When constructing the structure 20 by placing concrete 40 sequentially in the structure as shown in FIG. 3, there is a disadvantage that the aesthetics are not beautiful because the color of the concrete is different in each section, and the construction period becomes longer. The biggest problem in construction is the increase in construction cost.

In addition, to solve the above problems is presented a method for simultaneously placing a long concrete structure as shown in Figure 3 attached, which is a conventional dowel bar 80 and dowel bar cap 90 do not have a fixed device dowel bar cap When the concrete 40 is poured in a state in which the 90 is not properly fixed, the dowel bar cap 90 is separated by the vibration of the concrete compacting vibrator, and concrete water flows into the dowel bar cap 90 or is in a distorted state. As there are frequent cases of sub-construction because they are not cured, they are urgently needed for material development and precise construction.

The present invention is to solve the above problems, using the dowel bar and the dowel bar tube expansion joint plate and dowel through the male and female screws on the dowel bar fixing device so that the dowel bar of the expansion joint of the concrete structure can be precise construction It is to provide a dowel bar fixing device for expansion joint plate that can easily and precisely construct the dowel bar in the correct position by fastening and fastening the bar.

In addition, in order to prevent damage due to cracking and rupture due to shrinkage and expansion phenomena due to the temperature change of the concrete structure, expansion joint plates are fastened by the hydrogen rocket and cowcket of the dowel bar fixing device. The dowel bar is to be fixed, the expansion joint is maintained at a constant interval, and to provide a dowel bar fixing device of the expansion joint plate that can be cast a plurality of concrete at the same time.

In addition, after installing expansion joint plate and dowel bar in the expansion joint of concrete, we provide the dowel bar fixing device for expansion joint plate that can be placed at the same time regardless of construction length. Is in.

According to a first aspect of the present invention for achieving the above object, a series of expansion joints to prevent damage due to cracking and rupture during expansion and contraction of concrete in accordance with changes in temperature and climate in the concrete poured structure In the dowel bar fixing device configured to pour the structure of the at the same time, insert the dowel bar that can be fixed at the time of concrete pouring into the dowel bar insert pipe and the dowel bar insert pipe A dowel bar fixing cap configured on one side, and a dowel bar fixing device composed of a male socket and a female socket to fasten the dowel bar by coupling, and the upper and lower sides of the dowel bar fixing device, respectively, are contracted and expanded when pouring concrete. The expansion and contraction consists of sheet for expansion joints that provide expansion joints at regular intervals to prevent damage caused by cracks and tears. To provide a dowel bar fixing device for drinking plates.

According to a second aspect of the present invention for achieving the above object, a series of expansion joints to prevent damage due to cracking and rupture during expansion and contraction of concrete in accordance with changes in temperature and climate in the concrete poured structure In the dowel bar fixing device configured to pour the structure at the same time, the outer end surface of the round or square bar consisting of a fixed end fixed to one side of the longitudinal half to the concrete and a movable end to move the other side in the concrete After forming a paint or lube coating on the dowel bar is configured to be wrapped around the shrinkage after inserting the heat shrink tube to protect the paint or lube coating, and the male socket and female socket fixed dowel bar to combine and fasten the dowel bar Device and the upper and lower sides of the dowel bar fixing device, respectively, are respectively constructed Axis, the stretching characterized in that the expansion is configured as a plate member to provide a drinking expansion joints at certain intervals to provide a multi-welba retainer sheet material of drinking water in order to prevent damage due to cracking and rupture by the swelling.

At this time, according to an additional feature of the present invention, the dowel bar fixing device is configured to each of the upper and lower sides of the inside of the concrete structure when the dowel bar is inserted through the dowel bar insertion hole formed on the outer surface to provide the expansion joint portion A male socket formed with a fixing plate for forming a butt-fitting plate to fix and support the expansion joint plate, the male screw which is integrally formed with the fixing plate and can be combined with the female screw of the female socket for fastening and the dowel bar. And a female thread formed on the inner surface of the socket to be coupled to the male screw of the male socket to be engaged with the male socket, and the female socket having a tightening jaw capable of tightening the fixing lip of the male socket capable of fixing the dowel bar. It is desirable to be.

In addition, according to an additional feature of the present invention, the dowel bar fixing cap to secure a free space for the movable end of one side of the dowel bar due to the expansion of the concrete structure when the temperature of the concrete structure rises in the dowel bar insertion tube In order to cover the outer end of the movable end dowel bar insertion tube is preferably configured to cover.

Further, according to an additional feature of the present invention, the male screw portion of the male soget of the dowel bar fixing device to the expansion joint portion is coupled to the dowel bar insertion hole in the middle portion of the expansion joint plate and the female screw of the female socket of the fixing device It is preferable to be configured to be able to pour the concrete simultaneously or separately by fastening and fastening to the male screw of several sogets.

Dowel bar fixing device for expansion joints according to an embodiment of the present invention, when the dowel bar fixing device and the concrete structure is expanded according to the temperature rise by a predetermined space maintained in the dowel bar insertion tube inserted dowel bar It can be configured to move in the dowel bar insertion tube can provide the stability of the concrete structure according to the temperature rise.

In addition, the dowel bar is accurately positioned by fastening the expansion plate and the dowel bar through the male and female screws on the dowel bar fixing device so that the dowel bar of the expansion joint of the concrete structure using the dowel bar and the dowel bar insertion pipe can be precisely installed. It can be easily and conveniently located in the to provide precise construction.

In addition, the expansion joint plate on the concrete expansion joint is fastened by the dowel bar fixing device by the hydrogen and cowckets to fix the dowel bar, and maintain the expansion joint at a constant interval, and can cast a plurality of concrete at the same time In addition, damages can be prevented by cracking and rupture caused by shrinkage and expansion phenomena according to the temperature change of concrete structures.

In addition, after installing the expansion plate and the dowel bar in the expansion joint of concrete, one span can be spliced or concrete can be placed at the same time regardless of the construction length.

In addition, when installing concrete joints and dowel bars after installing conventional expansion joints at the same time, there is no fixing device in the dowel bar and dowel bar fixing caps, thereby overcoming the limitations of precision construction in the correct position, and dowel bar fixing caps when placing concrete Deviation from expansion joint plate can be prevented, so poor construction can be solved.

1A is a perspective view of a concrete structure of a retaining wall on which a conventional expansion joint is installed
Figure 1b is a perspective view of the concrete structure of the conventional waterway in which the expansion joint is laid Fig.
1C is a perspective view of a concrete structure of a pavement road in which conventional expansion joints are installed
Figure 2 is a perspective view of the dowel bar and the dowel bar cap according to the prior art
Figure 3 is a conventional installation of expansion joint dowel bar before concrete pouring.
Figure 4 is a cross-sectional view showing a conventional concrete ear placing construction procedure.
Figure 5 is a perspective view of the dowel bar and the fixing device according to an embodiment of the present invention.
6 is a perspective view illustrating a state in which a dowel bar and a dowel bar insertion tube are fastened according to an exemplary embodiment of the present invention;
Figure 7 is a cross-sectional view showing a fastening state of the male screw and the female thread of the dowel bar fixing device according to an embodiment of the present invention.
Figure 8 is a cross-sectional view showing the state of the male and female screws of the dowel bar fixing device according to an embodiment of the present invention.
9 to 12 are cross-sectional views showing the order in which the expansion joint plate according to an embodiment of the present invention is assembled and fixed to the dowel bar and the dowel bar fixing device.
Figure 13 is a state in which the concrete is poured into the dowel bar fixing device for expansion joint plate according to the present invention.
14A to 14D are perspective views illustrating a configuration of a dowel bar according to another embodiment of the present invention.
15 is a cross-sectional view of the dowel bar and the dowel bar fixing device of FIG.
Figure 16 is a state in which the concrete is poured into the dowel bar fixing device for expansion joint plate according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a detailed description of preferred embodiments of the present invention will be given with reference to the accompanying drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Figure 5 is a perspective view showing a dowel bar and the fixing device according to an embodiment of the present invention, Figure 6 is a cross-sectional view showing a state in which the dowel bar and the dowel bar insertion tube according to an embodiment of the present invention, Figure 7 FIG. 8 is a cross-sectional view illustrating a fastening state between a male screw and a female screw of a dowel bar fixing device according to an embodiment of the present invention, and FIG. 8 is a cross-sectional view showing a male screw and a female screw of a dowel bar fixing device according to an embodiment of the present invention. 9 to 12 are cross-sectional views showing the order in which the expansion joint plate according to an embodiment of the present invention is assembled and fixed to the dowel bar and the dowel bar fixing device, Figure 13 is a concrete in the dowel bar fixing device according to the present invention Figure 14a to 14d is a perspective view showing the configuration of a dowel bar according to another embodiment of the present invention, Figure 15 is a cross-sectional view of the dowel bar and the dowel bar fixing device of Figure 14 16 shows a state diagram in which concrete is poured into a dowel bar fixing device of a sheet for expansion joint according to another embodiment of the present invention.

The present invention is an invention configured to present the features of the dowel bar fixing device of the expansion joint plate, Figure 5 is a perspective view showing a dowel bar and the fixing device according to an embodiment of the present invention, Figure 6 is an embodiment of the present invention As a cross-sectional view showing a state in which a dowel bar and a dowel bar insertion tube are fastened according to the present invention, referring to the attached dowel bar fixing device of the expansion joint sheet of the present invention with reference to FIGS. 5 and 6,

First, the dowel bar 80 and the fixing device 120 according to the present invention is inserted into the dowel bar 80 that can be fixed when placing concrete in the dowel bar insertion pipe 110 and the inserted dowel bar 80 is one The dowel bar insertion tube 110 is configured to fasten through the dowel bar fixing cap 250 to prevent the deviation in the direction.

As shown in FIG. 7 attached to the dowel bar insertion tube 110 configured as described above, the dowel bar 80 is inserted into the expansion joint plate and the dowel bar fixing device 200 are fastened and formed in a fixed state. Detailed configuration and operation thereof will be described with reference to FIGS. 8 to 12.

First, FIG. 8 is an exploded cross-sectional view of a fixing device 200 to which a dowel bar inserted into the dowel bar insertion pipe 110 is to be fixed, and its configuration is largely male socket 220 of the fixing device 200 of the dowel bar 100. And a female socket 240.

The concrete 40 is a solid, sensitive to temperature changes, and thus shrinkage phenomenon and expansion phenomenon occur in winter, so that the expansion joint 30 is spaced at regular intervals to prevent damage due to cracking and rupture.

In order to form the expansion joint 30 to prevent the crack and rupture, the expansion joint plate 130 is configured on the upper and lower sides of the dowel bar fixing device 200.

Looking at the detailed configuration of the fixing device 200 to which the dowel bar is to be fixed, the male socket 220 of the dowel bar fixing device 200 is fixed plate 221, dowel bar insertion hole 223, male screw 225, fixed lip ( 227, and the female socket 240 of the fixing device 200 to which the dowel bar is to be fixed includes a female screw 242 and a tightening jaw 244, respectively.

When the dowel bar 80 inserted into the dowel bar insertion tube 110 is inserted through the dowel bar insertion hole 223 of the fixing device 200, the expansion joint plate 130 is formed on each of the upper and lower sides of the concrete structure. Fixed plate 221 and a fixed plate 221 and the fixed plate 221 integrally composed of the circumferential spiral of the male socket 220 of the male screw 225 and the female socket 240 of the male socket 220 The female screw 242 is fastened, and is inserted through the dowel bar insertion hole 223 by the tightening jaw 244 of the cowcket 240 capable of tightening the fixing lip 227 of the male socket 220. The well bar 80 is fastened.

On the other hand, when the dowel bar 80 is fixed by the hydrogen bucket 220 and the cowcket 240 by the dowel bar fixing device 200, the dowel bar insertion tube 110 into which the dowel bar 80 is inserted. Is formed to maintain a constant space, and configured to cover the dowel bar insertion tube 110, the dowel bar fixing cap 250 is configured to prevent the departure in one direction of the movable end of the dowel bar insertion tube 110 This is because, when the dowel bar fixing device 200 and the concrete structure expands as the temperature rises, the dowel bar 80 may move in the dowel bar insertion tube 110 by a predetermined space of the dowel bar insertion tube 110. It is configured to be.

By the above, the configuration of the dowel bar 80 and the fixing device 200 to which the hydrogen rocket 220 and the cowcket 240 are fastened is configured as shown in FIG. 5.

Hereinafter, referring to the attached FIG. 9 to FIG. 12, the detailed procedure in which the dowel bar fixing device 200 and the dowel bar 80 according to the present invention are configured will be described.

First, as shown in FIG. 9 inserts the dowel bar 80 into the dowel bar insertion tube 110 and covers the dowel bar fixing cap 250 to prevent separation in one direction at the end of the movable end of the dowel bar insertion tube 110 The dowel bar insertion tube 110 into which the dowel bar 80 is inserted is inserted into the hydrogen socket 220 of the fixing device 200. At this time, the other end of the dowel bar insertion tube 110 is to be located in the hydrogen socket 220 of the fixing device 200.

Dowel bar insertion tube, dowel bar fixing cap 250 and the fixing member 200 is inserted into the plate 130 for expansion joints on the upper and lower one side of the hydrogen socket 220 in the configuration inserted The fixing plate 221 is positioned to be fixed. One side of the expansion joint plate 130 is supported by the fixing plate 221 of the hydrogen socket 220 is configured so that the other side is positioned in the direction of the male screw 225, the expansion joint is located on the hydrogen socket 220 The other surface of the plate member 130 is supported by the cowcket 240 of the fixing device 200 shown in FIGS. 11 to 12, wherein the plate member 130 for the expansion joint is the male screw 225 of the hydrogen plate 220. And the female screw 242 of the cowcket 240 is configured to be fastened respectively.

That is, the expansion joint plate 130 has a butt structure to correspond to one surface of the hydrogen plate 220, the fixing plate 221 and one surface of the female screw 242 of the cowcket 240.

Meanwhile, when the expansion joint plate 130 is fastened by the hydrogen socket 220 and the cowcket 240, the fixing lip 227 of the male screw 225 is fastened to the male socket 240 coupled to the male screw. Since the 244 tightens the fixed lip 227, the dowel bar 80 is configured to be fixed.

Subsequently, when the dowel bar 80 and the dowel bar fixing device 200 are fastened and fixed, as shown in FIG. 13, the dowel bar 80 is fixed by placing the fixed dowel bar 80. 130, fixed by the combined coupling of the hydrogen socket 220 and the cowcket 240 and precision construction is possible by separating or pouring the concrete 40 at the same time, the long length of the structure for a plurality of expansion joints ( 130) can prevent damage caused by cracking and rupture when the concrete is stretched and contracted in the direction perpendicular to the longitudinal direction of the structure constructed by placing concrete, and can separate or pour a plurality of concrete 40 at the same time. Can be.

On the other hand, the dowel bar fixing device 200 constructed as described above, the towel bar 80 is a dowel bar fixing device 200 by a predetermined space maintained in the dowel bar insertion pipe 110 into which the dowel bar 80 is inserted. When the concrete structure is expanded according to the temperature rise, the dowel bar 80 may be configured to move within the dowel bar insertion tube 110, thereby ensuring the stability of the concrete structure due to the temperature rise.

Therefore, looking at the process of the dowel bar fixing device for expansion joints according to the present invention, the dowel bar 80 is inserted into the dowel bar insertion tube 110 as shown above of the dowel bar fixing device 200 It is inserted into the dowel bar insertion hole 223 in the dowel bar fixed male socket 220.

That is, the male screw 225 of the male socket 220 of the dowel bar fixing device 200 is inserted into the dowel bar insertion hole 223 formed at a predetermined interval in the center of the expansion joint plate 130, and the inserted dowel bar fixing device ( The fixing plate 221 of the 200 is in close contact with the expansion joint plate 130, and then tightly fixed to the expansion joint plate 130 by using the female screw 242 of the coupling fastening female socket 240. When tightened, the tightening jaw 244 of the female socket 240 tightens the fixing lip 227 of the male socket 220 of the dowel bar fixing device 200 to extend the dowel bar 80 and the fixing device 200 to the expansion joint plate ( 130) without movement. Thereafter, as shown in FIG. 13, the dowel bar fixing device 200 of the expansion joint plate according to the present invention by separating or simultaneously pouring concrete 40 may be accurately installed on the expansion joint plate 130. do.

Therefore, when the dowel bar 80 and the dowel bar fixing device 200 are fastened and fixed, they are fixed by pouring with concrete 40. The fixed dowel bar 80 is installed in the expansion joint plate 130 and the hydrogen ket ( 220) and fixed by the coupling of the cowcket 240, and the concrete 40 can be removed or placed at the same time to precise construction, the long length of the structure composed of a plurality of expansion joint plate 130 of concrete The concrete can be prevented from damage caused by cracking and rupture when the concrete is stretched and contracted in a direction perpendicular to the longitudinal direction of the structure to be built, and can be poured separately or simultaneously a plurality of concrete (40).

According to the present invention, the dowel bar insertion hole (not shown in the drawing) in the middle portion of the male joint part 225 of the male screw 220 of the dowel bar fixing device 200 to the expansion joint part 30 according to the present invention. And fasten the female screw 242 of the fixing device female socket 240 to the male screw 225 of the male socket 220 of the fixing device 200 to simultaneously cast and precisely install the concrete 40. In addition, the fixing lip 227 of the male screw 225 is the tightening jaw 244 of the female socket 240 is fastened to the male screw 225, the female screw 242 of the female socket 240 is a male screw ( The dowel bar 80 may be fixed by tightening the fixing lip 227 when tightening the 225.

On the other hand, as another embodiment of the present invention by applying the modified configuration of the dowel bar fastened to the dowel bar fixing device, looking at the detailed procedure through the configuration of the accompanying Figures 14a to 14d,

The dowel bar 80 of another embodiment is composed of a round or square bar, the detailed configuration consists of a fixed end fixed to one side of the longitudinal half in the concrete and a movable end of the other end of the other half in the concrete. At this time, the paint or lubricating oil coating is formed on the outer circumferential surface of the movable end of the round or square bar, and then the heat shrink tube is inserted into the heat shrinkable tube to protect the paint or lubricating oil coating.

That is, it is divided into a fixed end 830 fixed to the concrete and a movable end 85 movable in the concrete. At this time, after the lubricating oil coating (50) on the longitudinal outer peripheral surface of the movable end 85, the heat shrink tube 240 is configured to insert and heat shrink wrapped.

That is, a heat shrink tube is inserted on the one side of the movable end 85 of the dowel bar to form a coating with lubricant on the movable end of the dowel bar so as to smoothly operate the movable end without applying a rust paint. It is configured to wrap by heat shrink.

As described above, if the movable end 85 is wrapped in the heat shrink tube 60 on the lubricating oil coating 50, the friction force between the concrete and the dowel bar 80 may be reduced even if the movable end 85 is operated in concrete. .

That is, even if the paint is not applied to the movable end 220, the formed lubricant coating is protected by a heat shrink tube to prevent the lubricant from being damaged even when the movable end is operated.

On the other hand, after forming the paint on the outer peripheral surface of the movable end of the round or square bar may be configured to be wrapped by heat shrink after inserting the heat shrink tube 60 to protect the paint.

In addition, it may be configured to protect the lubricating oil coating or painting by wrapping the vinyl on the outer peripheral surface of the lubricating oil coating or painted on one side of the half of the circular or square bar.

14B to 14D, when the lubricant coating 50 is applied to the movable end 85, the lubricant coating 50 formed on the movable end 85 is a dowel bar 80 and a heat shrink tube. Since it is seated between the 60, the lubricant coating 50 can be maintained semi-permanently even without friction with the concrete, by using the lubricant 50 and the heat shrink tube 60, the circular steel bar 70 Since the lubricant coating 50 is formed in an extremely fine space between the two members of the heat shrink tube 60, the sliding rods are formed on the two members of the circular steel bar 70 and the heat shrink tube 60. ) Runs more smoothly in concrete.

The expansion joint plate of the present invention as shown in Figure 15 attached through the fastening of the dowel bar fixing device 200 of the dowel bar fixing device 200 by the above procedure and the dowel bar 80 configured as described above The dowel bar fixing device may be fastened, and concrete may be poured into the dowel bar fixing device as shown in FIG. 13.

As described above, the specification and the drawings have been described with respect to the preferred embodiments of the present invention, although specific terms are used, it is only used in a general sense to easily explain the technical contents of the present invention and to help the understanding of the invention. It is not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention can be carried out in addition to the embodiments disclosed herein.

20: concrete structure 30: expansion joint
40: concrete 50: lubricant coating
60: heat shrink pipe 70: round (square) steel bar
80: Dowel Bar 90: Towel Bar Cap
110: dowel bar insertion tube 130: expansion joint plate
200: dowel bar fixing device
220: Dowel Bar Fixed Male Socket
221: fixing plate 223: dowel bar insertion hole
225: external thread 227: fixed lip
240: Dowel bar fixed arm socket
242: internal thread 244: tightening jaw
250: Dowel Bar Fixing Cap

Claims (5)

In the dowel bar fixing device configured to prevent damage due to cracks and ruptures during expansion and contraction of concrete according to the change of temperature and climate and to cast a series of structures with expansion joints at the same time,
A dowel bar fixing cap formed on the other side of the dowel bar insertion tube to insert a dowel bar that can be fixed when placing concrete into the dowel bar insertion tube and to prevent the inserted dowel bar from being separated in one direction;
A dowel bar fixing device comprising a male socket and a female socket to couple and fasten the dowel bar;
Each of the upper and lower sides of the dowel bar fixing device is composed of a sheet for expansion joints that provide expansion joints at regular intervals to prevent damage due to cracking and rupture due to shrinkage and expansion during concrete placing. Dowel bar fixing device for expansion joint plate.
In the dowel bar fixing device configured to prevent damage due to cracks and ruptures during expansion and contraction of concrete according to the change of temperature and climate and to cast a series of structures with expansion joints at the same time,
Paint or lubricant coating is formed on the outer circumferential surface of the movable end of a round or square bar consisting of a fixed end fixed at one side of the longitudinal half to the concrete and a movable end operated at the other end to the concrete. Dowel bar configured to be wrapped by heat shrink after inserting the heat shrink tube for protection,
A dowel bar fixing device comprising a male socket and a female socket to couple and fasten the dowel bar;
Each of the upper and lower sides of the dowel bar fixing device is composed of a sheet for expansion joints that provide expansion joints at regular intervals to prevent damage due to cracking and rupture due to shrinkage and expansion during concrete placing. Dowel bar fixing device for expansion joint plate.
The method according to claim 1 or 2,
The dowel bar fixing device
When the dowel bar is inserted through the dowel bar insertion hole formed on the outer surface is formed in each of the upper and lower sides of the inside of the concrete structure to form a butt fixed plate for fixing to the expansion joint plate to provide the expansion joint portion, A male socket configured integrally with a fixed plate and configured with a male screw capable of engaging with a female screw of a female fastening socket, and a fixed lip capable of fixing the dowel bar;
The female thread is formed on the inner surface of the socket to be coupled to the male socket to be engaged with the male socket, and the female socket is provided with a tightening jaw capable of tightening the fixing lip of the male socket capable of fixing the dowel bar. Dowel bar fixing device for expansion joint plate characterized in that.
The method of claim 1,
The dowel bar fixing cap
When the temperature of the concrete structure increases, the movable end of the dowel bar is covered with a cap on the outer end of the dowel bar insertion tube to secure a free space to move within the dowel bar insertion tube due to the expansion of the concrete Dowel bar fixing device for expansion joint plate.
The method of claim 3, wherein
The male threaded portion of the male socket of the dowel bar fixing device to the expansion joint is coupled to the dowel bar insertion hole at regular intervals in the middle portion of the sheet for expansion joint, and the female socket of the female socket is fastened to the male screw of the male socket of the fixing device. Dowel bar fixing device for expansion joints, characterized in that configured to be poured at the same time or separate.

Images