KR102069667B1 - Pressure type coupler with means for individually pressing the wedge - Google Patents

Abstract

The present invention relates to a structure of a coupler used for connecting or mounting a reinforcing bar or a steel strand in a construction work field. The coupler comprises: a pressurization material made of a plurality of wedge pieces to cover a reinforcing bar; a fixing material configured to accommodate the pressurization material to generate a wedge force to the pressurization material; and a body configured to form an appearance of the coupler while storing the fixing material. Moreover, a lower portion of the pressurization material has a press plate that can press individual wedge piece in an upper vertical direction as a direction in which an opening into which the reinforcing bar is inserted of longitudinal directions of the coupler.

Description

PRESSURE TYPE COUPLER WITH MEANS FOR INDIVIDUALLY PRESSING THE WEDGE}

The present invention relates to a structure of a coupler used when jointing or fixing reinforcing bars or strands at a construction site, and more specifically, presses a reinforcing bar or strand to be joined or fixed in a one-touch manner using the principle of wedge pressure. A coupler structure for fixing with

Reinforcing bars, which are the core members of reinforced concrete structures, are limited in length due to the conditions of manufacturing, transportation, and work. Therefore, reinforcing bars and fixing of stranded wires are frequently performed at construction sites.

Taking the reinforcing bar as an example, his most common methods include overlapping joints that overlap two bars to be joined and then tie them together with a binding line, joints by welding, and mechanical joints using sleeves or couplers. In order to improve the shortening of air due to the improvement of the use of the mechanical joint method using a coupler is gradually increasing.

In addition, the mechanical joint method forms a screw thread at the end of the reinforcing bar to be joined, and a screw fastening method for fixing the reinforcing bar to the coupler by screwing with the coupler and pressing the reinforcing bar by wedges to reinforce the bar by the principle of wedge pressure. There is a wedge pressurization to fix the coupler.

In the latter wedge pressurization method, especially one-touch coupler, unlike the screw-type structure, which requires at least two people to work together, the rebar is fixed to the coupler simply by inserting the rebar into the coupler. It is easy to work with joints, and its use has been greatly expanded.

As shown in FIG. 1, the one-touch rebar coupler includes a base body 111 having a partition wall and accommodation spaces on both sides, an elastic member 157 inserted into the accommodation space, and an outer end portion of the elastic member. Joining bracket 153 to support the plurality of wedge-shaped coupling pieces 155 and the wedge surface 151b corresponding to the coupling piece 155 on the inner side is coupled to the base body 111 It consists of a housing 151.

Accordingly, when the reinforcing bar is inserted into the housing 151 as shown in the right part of FIG. 1, as the reinforcing bar moves inward, a plurality of engaging pieces 155 engaged with the reinforcing bar move together. As in the left part, the coupling pieces 155 are pushed back by the elastic member 157 and the bonding member 153, and the reinforcing bars are brought into close contact with the wedge surface 151 b of the inner surface of the housing 151 by the coupling pieces 155. Do not bite and move.

However, the above-described operation of the one-touch rebar coupler is based on the premise that the plurality of coupling pieces 155 moving together when the reinforcing bar is inserted into the housing 151 moves without maintaining a unity. .

However, in practice, most of the coupling pieces 155 are shifted to be offset from each other, and as a result, even though the fastening of the reinforcing bar to the coupler is completed, between the coupling pieces 155 and the joining member 153 or the wedge surface 151b. There is a problem in that the clearance space is formed and the coupling piece 155 remains in a state where it can flow, so that the fastening state is unstable.

In addition, when the fastening state is unstable as described above, since the entire coupler is dismantled and then reassembled, reworking is required.

KR 10-1845850 B1

The present invention is to solve the above problems of the prior art, even when a plurality of wedge pieces to be inserted with this when the rebar or strand (hereinafter collectively referred to as "reinforcement") is inserted into the interior of the pulleys of the rebar In the state that the tightening is completed, the clearance space does not occur in the upper and lower ends of each wedge piece, and even if the retightening of the reinforcing bar to the coupler is necessary, the worker can easily rework without disassembling the entire coupler. It is intended to provide a pressure coupler.

According to the most preferred embodiment of the present invention for solving the above problems, and a pressing body consisting of a plurality of wedge pieces to surround the rebar. And a body for accommodating the press body to generate a wedge pressure in the press body, and a body for forming the exterior of the coupler while accommodating the fixed body, wherein each wedge piece is individually disposed under the press body. There is provided a pressurized coupler with individual wedge-piece contact means, which is provided with a contact plate capable of pushing in a vertical upward direction (referring to a direction in which an opening into which rebars are inserted in the longitudinal direction of the coupler).

At this time, as the number of the wedge pieces constituting the pressing body as the number of the elastic pieces are provided at equal intervals in the close contact body, it can be provided so that the elastic pieces that each independently act on the lower portion of each wedge piece.

In addition, the elastic piece is composed of an upper elastic portion that is in contact with the lower surface of the wedge piece to push the wedge piece with elastic force, and a lower elastic portion bent at the lower end of the upper elastic portion and connected to the contact body, the lower elasticity between the two sides of the contact body and the lower elastic portion The elastic slit for inducing negative elasticity can be formed.

According to another embodiment of the present invention, a spring is built into the body to push the pressing body upward, a support plate is installed on the upper portion of the spring, the contact plate is placed on the upper surface of the support plate, the support plate is elastic An elastic piece receiving groove for accommodating the lower movement of the convenience and a space for maintaining the gap between each wedge piece are provided at equal intervals in the support body, and the close body has a space for receiving space for accommodating the space. There is provided a pressurized coupler equipped with individual wedge piece contact means.

According to another embodiment of the present invention, an elastic ring for pushing each wedge piece outward in the horizontal direction is installed inside the pressurizing body, and an inner surface of the wedge piece is provided with a flow surface for freely moving the elastic ring up and down. There is provided a pressurized coupler with individual wedge piece contact means, characterized in that it is provided.

According to another embodiment of the present invention, the inner surface of the body is formed with a female screw portion, the outer surface of the fixing body is formed with a male screw to be screwed to the female screw portion, the male screw portion is characterized in that the dismantle display portion is provided A pressurized coupler is provided with individual wedge piece contact means.

According to the present invention, each of the elastic pieces of the contact plate pushes each of the wedge pieces individually and independently in correspondence to the degree of entry of the wedge pieces, so that the wedge pieces of the press body are inserted during the process of inserting the rebar into the coupler. Even if they do not coincide with each other, the wedge pieces do not form a clearance space above and below, so that the wedge pieces are firmly sandwiched between the inner surface of the fixture and the outer surface of the rebar to maintain the fixed state of the rebar, so that the rebar is stably fixed to the coupler.

In addition, according to the present invention, as the elastic ring is installed on the flow surface provided on the inner surface of the press body, the above-described close contact is made smoothly, and the elastic ring maintains the correct position even if the fixing work of the reinforcing bar is made incorrectly. Therefore, not only can the rework be performed without dismantling the coupler, but also the removal status of the rebar can be confirmed by the dismantling display unit, and the rebar fixing for the coupler can be easily modified.

1 is a cross-sectional view of a coupler according to the prior art.
2 is a cross-sectional view of the rebar is fixed to the coupler according to an embodiment of the present invention.
3 is an exploded perspective view of the coupler of the present invention.
4 is a perspective view of each embodiment of the fixture of the present invention.
5 is a perspective view of the adhesion plate of the present invention.
6 is an explanatory view of the operation relationship of the contact plate.
7 is a perspective view of a support plate of the present invention.
8 is a perspective view of a state in which the support plate and the contact plate is coupled.
9 is a cross-sectional view of the guide tube installed in the spring of the present invention.
10 is a cross-sectional view of the pressing piece and the fixed body provided with the elastic ring of the present invention.
11 is an explanatory view of the action by the fluid surface of the present invention.
12 to 14 are each cross-sectional view of the coupler shape to which the present invention is applied.

Hereinafter, with reference to the accompanying drawings, the most preferred embodiment of the present invention will be described in detail. However, in describing the present invention, when the technical concept of the present invention is obscured or obscured by describing the known configuration in detail, the description of the known configuration will be omitted.

2 is a cross-sectional view of a state in which the rebar 70 is fixed by using a coupler according to an embodiment of the present invention, and FIG. 3 is an exploded perspective view of the coupler of the present invention.

As shown in FIG. 3, the coupler of the present invention includes a press body 30 including a plurality of wedge pieces 31, a fixture 20 accommodating the press body 30, and the fixture 20. It is configured to include a body 10 for receiving.

The wedge piece 31 is to wrap the reinforcing bar 70 at regular intervals to fix the reinforcing bar 70 to the wedge pressure generated when the insert is in close contact with the interior of the fixture 20, tapered for generating the wedge pressure A friction protrusion 34 is provided on the inner surface to have a high friction force with respect to the rebar 70 together with the inclined outer surface 32. At this time, the friction protrusion 34 may have a cross-section of various shapes, but the cross-sectional loss of the rebar fixed to the coupler is not easily dug into the rebar, even if a large pressure is applied to the rebar by constructing a cross-section of an angle of 60 degrees inclined to both sides. It is desirable not to occur.

In addition, the friction protrusion 34 may be formed in a continuous spiral shape to improve the workability of the wedge piece 31.

A ring groove 33 is provided on an outer surface of the wedge piece 31, and a rubber ring 36 is inserted into the ring groove 33 so that each wedge piece 31 can be integrally assembled.

The inner surface of the fixing body 20 is provided with the inclined inner surface 23 of the inclined angle corresponding to the inclined outer surface 32 of the wedge piece 31 so that the wedge pressure can be generated in response to the insertion degree of the wedge piece 31. do.

The fixing body 20 may be fastened by screwing into the interior of the body 10 forming the exterior of the coupler. For this purpose, an internal thread part 12 is formed on the inner surface of the body 10 and the high The outer surface of the stagnation 20 may be a male screw portion 21 to be screwed to the female screw portion 12.

At this time, as shown in (a) of FIG. 4, a gripper 24 is provided at an end of the outer surface of the fixing body 20 so that an operator can screw the body 20 by rotating the fixing body 20 with a hand or a tool. As shown in (b) of FIG. 4, the inner surface of the fixing body 20 is provided with the rotating projections 25 inserted into the gap between the wedge pieces 31 in the pressing body 30. The fixed body 20 may be screwed into the body 10 by rotating the fixed rebar 70.

However, as described above, in the structure in which the rebar 70 is fixed to the coupler using wedge pressures of the plurality of wedge pieces 31, the wedge together with the reinforcing bar 70 during the process of inserting the rebar 70 into the coupler. The pieces 31 are also moved together, where it is not practically easy to place the reinforcement 70 in the center between each of the wedge pieces 31, and thus between the reinforcing bars 70 and each of the wedge pieces 31. The friction will occur. In addition, this deviation is a gap between the wedges do not coincide with each other in the horizontal direction, but the part is inserted more and the other part is inserted less, while the clearance space (△) is formed to form a portion of the wedge piece 31 It is not fixed to the fixed body 20 and is shaken up and down.

Accordingly, the present invention removes the clearance space △ caused by the displacement of the wedge pieces 31 during the process of inserting the rebar 70 into the coupler by removing the wedge pieces 31 do not shake the inner surface and the reinforcing bar of the fixed body 20 It is to be surely fixed between the outer surface of the 70, for this purpose, the contact plate 40 is installed in the lower portion of the pressing body (30).

5 shows the contact plate 40 from the top and bottom, respectively, and FIG. 6 shows the operation relationship of the contact plate 40 in the drawing.

The contact plate 40 is configured to push each of the wedge pieces 31 vertically upwards, so that even if the degree of entry of the wedge pieces 31 is different, any space between the wedge pieces 31 ( ?) Does not occur.

The contact plate 40 for this purpose is provided with a plurality of elastic pieces 42 on the plate-like contact body 41 at equal intervals.

The elastic piece 42 is provided with the same number as the number of wedge pieces 31 constituting the press body 30, the elastic piece 42 is located at the bottom of each wedge piece 31, one wedge piece ( According to the degree of entry of the 31) each elastic piece 42 is elastically acting independently.

Therefore, as shown in Figure 6, even if the entry state of each of the wedge pieces 31 is different, the clearance space (△) is not formed in the upper and lower portions of the wedge piece 31, the fixed body 20 Between the inner surface and the outer surface of the reinforcing bar 70 will be able to have a firm fixed state without shaking.

The elastic piece 42 is bent in the opposite direction from the lower end of the upper elastic portion 42a and the lower elastic portion 42a for pushing the wedge piece 31 with elastic force in contact with the lower surface of the wedge piece, and the close contact with the main body 41. It is made of a lower elastic portion 42b connected.

As described above, the elastic piece 42 composed of the upper elastic part 42a and the lower elastic part 42b distributes the load acting on it by the dual elastic action, thereby making the elastic action flexible and expanding the range of the action.

At this time, the elastic slit 43 may be formed between both sides of the close contact body 41 and the lower elastic part 42b to induce elasticity of the lower elastic part 42b, which is a narrow portion of the close contact body 41. While allowing the elastic body to have a sufficient elastic force in the space, the position of the upper elastic portion 42a can be brought into close contact with the lower surface of the wedge piece 31.

The flow prevention of the wedge piece 31 using the contact plate 40 as described above can be applied to both the coupler of the structure for fixing the reinforcing bar 70 using the wedge pressure, one-touch coupler using the spring 61 Is even more useful.

One-touch coupler has a spring 61 is built into the body (10). The spring 61 pushes the pressing body 30 upward.

On the upper part of the spring 61 is provided a plate-like support plate 50 shown in FIG. The support plate 50 allows the elastic force of the spring 61 to act evenly on the entire pressing body 30, and has an organic relationship with the contact plate 40, thereby effectively functioning the function of the contact plate 40. Make it happen.

For example, the contact plate 40 is placed on the upper surface of the support plate 50. At this time, the elastic piece receiving groove 52 is provided in the support body 51 of the support plate 50, and the elastic piece receiving groove 52 accommodates the lower movement of the elastic piece 42 so that the elastic action of the close contact piece. Maximize your range.

The support plate 50 may be further provided on the support body 51 with a spacing 53 for maintaining a gap between each wedge piece 31.

The elastic piece receiving groove 52 and the spacing table 53 provided in each of the support body 51 are alternately positioned at equal intervals. The spacing 53 must maintain its shape without being deformed during the operation of the press body 30. Therefore, the support plate 50 is preferably made of an inelastic material, unlike the contact plate 40 of the elastic material.

In addition, when the spacer 53 is provided on the support plate 50 as described above, the contact plate 40 should be further provided with a space receiving space 44 for accommodating the space 53. In this case, the elastic pieces 42 and the interval receiving grooves 44 respectively provided on the close contact body 41 are also alternately positioned at equal intervals.

8 shows a state in which the support plate 50 and the contact plate 40 are coupled to each other, and the elastic piece 42 and the spacer 53 are projected upward while alternately positioned at the same interval. Therefore, when the spacing 53 is inserted into the gap between the wedge pieces 31, the elastic piece 42 is naturally placed in the correct position on the lower surface of the wedge piece 31, so that the action of the elastic piece 42 is accurate without error. It can be done.

When the reinforcing bar 70 enters into the interior space of the coupler, the pressurizer 30 enters together with the reinforcing bar 70 and compresses the spring 61 through the contact plate 40 and the support plate 50. When the entry of the reinforcing bar 70 is completed, the spring 61 is restored and the upper plate 40 and the support plate 50 are pushed upwards, so that each wedge piece 31 asks the bar 70 by the wedge pressure action. do. However, when excessive pressure or eccentricity is applied to the spring 61 when the rebar 70 enters, a part of the spring 61 is plastically deformed, thereby failing to exhibit sufficient restoring force.

Therefore, as shown in FIG. 9, the guide tube 62 restricting the degree of compression while guiding the compression direction of the spring 61 is made vertically as shown in FIG. 9 to solve the above problems. can do.

In the pressing body 30 of the present invention, an elastic ring 37 for pushing each of the wedge pieces 31 to the outside in the horizontal direction may be further installed.

10 illustrates a state in which the pressing piece in which the elastic ring 37 is installed is inserted into the fixing body 20, and as shown in FIG. 10, the rubber ring 36 is assembled to integrally assemble each of the wedge pieces 31. The wedge pieces 31 are installed on the outer surface of the lower end of the press body 30 and press these wedge pieces 31 inwardly, while the elastic ring 37 is installed on the central inner surface of the press body 30 and these wedge pieces 31. ) To press outwards.

As a result, the inner space of the pressurizer 30 has a structure of a light-receiving narrow, so that the rebar 70 is more easily inserted.

The elastic ring 37 may have various shapes, but most preferably, a part of the ring is removed to have a shape in which both ends thereof are opened. Such a shape makes it easy to elastically deform the inner diameter of the elastic ring 37 so that the contact between the pressing body 30 and the reinforcing bar 70 is easily made.

At this time, when the end of the elastic ring 37 is located within the gap between the wedge pieces 31, the wedge piece 31 is caught by the end of the elastic ring 37, the operation is not easy, both ends of the wedge piece (31) is to be located on the inner surface.

In addition, the elastic ring 37 may protrude from the friction protrusion 34, but the reinforcing bar 70 does not move together with the reinforcing bar 70 when the reinforcing bar 70 enters the inside of the pressure body 30. It must have an inner diameter larger than the outer diameter of.

The elastic ring 37 is positioned between the friction protrusions 34 provided in each of the wedge pieces 31, and when some of the wedge pieces 31 are displaced, the installation state of the elastic ring 37 is provided. There is also room for deviation from the inside of the pressing body 30 while inclined obliquely.

Therefore, the above-described problem is solved by further including a flow surface 35 on which the elastic ring 37 freely moves up and down on the inner surface of the wedge piece 31 of the present invention. 11 illustrates a process in which the elastic ring 37 is held in place by the action of the fluid surface 35 described above.

In addition, the elastic ring 37, which can maintain its position by having the flow surface 35 as described above, enables rework of the reinforcing bar 70 without completely dismantling the coupler as described below.

When the fixing work of the reinforcing bar 70 to the coupler is made wrong, it is often necessary to disassemble and reassemble them, but in the case of the one-touch coupler, it is not easy to reassemble each disassembled part. The work time will be longer.

For example, a conventional one-touch coupler, in which a guide ring (not shown) is positioned between the wedge pieces 31 to guide the insertion of the reinforcing bar 70 and enters together with the reinforcing bar 70, enters the reinforcing bar 70. After this is completed, the guide ring is separated to the bottom surface of the partition wall 11 formed in the body (10). In addition, even if the elastic ring 37 for passing the reinforcing bar 70 between the wedge pieces 31 is installed, as described above, the wedge pieces 31 are shifted from each other and the elastic ring 37 is also out of position. There are many cases. As a result, these couplers have no choice but to disassemble and reassemble the entire assembly.

However, when the flow surface 35 is provided on the inner surface of the wedge piece 31, even if the wedge pieces 31 are shifted from each other, the coupler does not need to be disassembled for rework because the wedge pieces 31 remain intact. The coupler is returned to its original state simply by opening the wedge pieces 31 to remove the reinforcing bar 70 inserted during the initial working process from the press body 30.

Therefore, the worker can perform the above-mentioned fixing operation only by releasing a part of the fixing piece from the body 10 when the fixing operation of the reinforcing bar 70 is wrong.

At this time, in one embodiment of the present invention is further provided with a dismantling display unit 22 that can determine the degree of loosening of the fixture 20 required for rework. That is, the internal threaded portion 12 is formed on the inner surface of the body 10, and the external threaded portion 21 formed on the female threaded portion 12 is formed on the outer surface of the fixed body 20, the male threaded portion 21 By providing the dismantling display unit 22 in the body, when the worker only releases the fixing body 20 to the dismantling display unit 22, the rebar 70 is removed from the coupler, and the work for fixing the reinforcing bar 70 immediately thereafter. To make it work again.

In the above description, the present invention has been described with an example of a one-way coupler in which the rebar 70 is inserted only in one direction, but the embodiment is merely an example for easy understanding of the present invention. It will be apparent to those having the present invention that various modifications can be made within the scope of the technical idea of the present invention. For example, as shown in FIG. 12, the present invention may be applied to both directional couplers such as bidirectional couplers and cross couplers. In addition, as shown in Figure 13 may be applied to the joints of the reinforcing bar 70 having a different diameter, the body 10 should be installed in the partition wall 11 to support the end of the reinforcing bar 70, Although the structural form of the partition 11 as shown in FIG. 14 is different, it may be applied regardless of this. Therefore, such modifications will be described within the scope of the present invention as described in the claims.

10; Body 11; septum
12; Female thread part 20; Fixture
21; Male thread portion 22; Dismantling display
23; Inclined inner surface 24; Grip
25; Rotary projection 30; Pressurized body
31; Wedge piece 32; Inclined exterior
33; Ring groove 34; Friction protrusion
35; Flow plane 36; Rubber ring
37; Elastic ring 40; Contact plate
41; Close contact body 42; Elastic piece
42a; Upper elastic portion 42b; Lower elastic part
43; Elastic slit 44; Spacing
50; Support plate 51; Support body
52; Elastic knitting groove 53; Spacing
61; Spring 62; Guide tube
70; Reinforcing bars Δ; Play space

Claims (8)

And pressurizing body 30 consisting of a plurality of wedge pieces 31 so as to surround the reinforcing bar 70. It includes a fixed body 20 for receiving the pressing body 30 so that the wedge pressure is generated in the pressing body 30, and a body 10 for receiving the fixing body 20 to form the appearance of the coupler As it becomes,
The lower portion of the pressing body 30 is provided with a close contact plate 40 capable of pushing each wedge piece 31 vertically upwards,
In the contact plate 40, as many elastic pieces 42 as the number of the wedge pieces 31 constituting the pressing body 30 are provided at equal intervals in the contact body 41, and each of the wedge pieces 31 The elastic pieces 42 which are elastically acting independently of the lower portion are provided to be located,
The elastic piece 42 is in contact with the lower surface of the wedge piece 31, the upper elastic portion 42a for pushing the wedge piece 31 with an elastic force, and bent at the lower end of the upper elastic portion 42a is in close contact with the main body 41 It consists of a lower elastic portion (42b) connected to, and the elastic body slit 43 for inducing elastic action of the lower elastic portion (42b) is formed between both sides of the contact body 41 and the lower elastic portion (42b) A pressurized coupler provided with individual wedge piece contact means, characterized in that. delete delete The method of claim 1,
Inside the body 10 there is a built-in spring 61 for pushing the pressing body 30 in the upward direction,
The support plate 50 is installed on the upper portion of the spring 61,
The contact plate 40 is placed on the upper surface of the support plate 50,
The support plate 50 is equally supported on the support body 51 by a support 53 for maintaining a gap between the elastic piece receiving groove 52 for receiving the lower movement of the elastic piece 42 and each of the wedge pieces 31. Are provided at intervals,
The close contact body 41 is a pressure coupler with a separate wedge piece contact means characterized in that the interval receiving groove 44 for receiving the spacing 53 is provided. The method of claim 1,
An elastic ring 37 for pushing each of the wedge pieces 31 to the outside in the horizontal direction is installed inside the pressing body 30, and the elastic ring 37 freely moves up and down on the inner surface of the wedge piece 31. A pressurized coupler with individual wedge piece contact means, characterized in that a movable flow surface 35 is provided. The method of claim 1,
A friction coupler 34 is formed on an inner surface of the wedge piece 31, and the friction protrusion 34 is a pressurized coupler having individual wedge piece contact means, characterized in that the cross section of the inner angle inclined to both sides of 60 degrees. The method of claim 6,
The friction projection (34) is a pressure coupler with a separate wedge piece contact means characterized in that the continuous spiral shape. The method of claim 1,
The internal thread portion 12 is formed on the inner surface of the body 10,
The outer surface of the fixing body 20 is formed with a male screw portion 21 to be screwed to the female screw portion 12, the male screw portion 21 is characterized in that the disassembly display portion 22 is provided with Pressurized coupler with piece contact means.

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