KR100759837B1 - Iron reinforcement bar spacer - Google Patents

Abstract

An iron reinforcement bar spacer is provided to couple a spacer with an iron bar without using an additional long steel member by fixedly inserting the iron bar into a cavity formed between two members. An iron reinforcement bar spacer comprises first and second members(120,130), which are bent symmetrically to each other. A cavity(110) is formed between the first and second members(120,130) due to the bending structure of the first and second members(120,130). A connection member(140) is connected to one end of the first and second members(120,130). The connection member(140) includes a spring, the center of which is bent in an arc shape. The connection member extends by passing through the first and second members(120,130). Protrusions(125,135) are provided at end portions of the first and second members.

Description

Rebar spacer {IRON REINFORCEMENT BAR SPACER}

1 is a perspective view showing a conventional spacer.

2 is a perspective view showing a combination of a conventional spacer and reinforcing bars.

Figure 3 is a plan view showing a spacer connected to the connecting member of the present invention.

Figure 4 is a plan view showing a spacer connected to the connecting member of the forceps type as another embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100, 200: Spacer 110, 210: Space

120, 220: 1st member 130, 230: 2nd member

The present invention relates to a spacer, and more particularly, due to a simple structure formed by bending, it is easy to manufacture and use, and relates to a spacer having a certain strength, durability, and heat resistance using a material having the same properties as concrete.

Generally, when forming reinforced concrete walls, the reinforcing bars and formwork are spaced at a certain distance. One of the reasons is that the reinforcement and the concrete wall are distributed to support the force. Another reason is that concrete acts as a heat insulator in the event of a fire. Roughly, the outermost reinforcing bar in the sphere of the building will have a concrete covering, the thickness of which is specified by the regulations. In the event of a fire, the temperature of the flame rises to about 1000 degrees or more. For example, concrete with a thickness of about 3 cm can slow the transfer of heat by 2 hours. When two hours of fire occurs, it is time for everyone in the building to evacuate out of the building. Therefore, it is to secure the thickness of the concrete which is a fire-resistant material.

In addition, another reason for defining the coating thickness of buildings is to prevent oxidation of the rebar. In general, the oxidation index of the reinforcing bar located inside the concrete is approximately 11 to 13, maintaining an alkaline state. The oxidation of the alkaline reinforcing bar starts oxidation when acidification progresses and the pH falls below 10. However, when acid rain, CO2 or water penetrates through the cracks of concrete, the pH value to be oxidized falls below 10. Therefore, by maintaining a distance between the reinforcing bar and the outer wall of the building to a certain size it can delay the oxidation of the rebar.

As such, it is important to maintain a constant distance between the outer wall of the building and the reinforcing bar located at the outermost part, and the spacer is coupled to the reinforcing bar to maintain a constant distance between the reinforcing bar and the outer wall of the building.

Spacers used for this purpose are shown in FIGS. 1 and 2. 1 is a perspective view showing a conventional spacer, Figure 2 is a perspective view showing a combination of a conventional spacer and reinforcing bars.

As shown in the drawing, the spacer 1 has a half shape of an octagonal pillar, and provides a receiving space 5 in which one side is recessed and recessed. A portion of the reinforcing bar 40 may be accommodated in the accommodation space 5. The spacer 1 has a first surface 10 and a second surface 20 having a wire groove 12 formed along a center thereof. In addition, the upper portion of the spacer 1 is formed with a wire hole 14 for inserting and fixing the thick iron wire 30.

A part of the reinforcing bar 40 is inserted into the accommodation space 5 to fix the reinforcing bar 40 that has become the reinforcement. After inserting the reinforcing bar 40 into the receiving space 5, the coarse iron wire through the wire hole 14 and the wire groove 12 to couple the spacer 1 to the reinforcing bar 40 ( 30) is fixed after wrapping the reinforcing bar 40. The conventional spacer is formed of a concrete material to ensure a certain strength, and then the concrete and the material is filled with the same between the reinforcing reinforcing bar is good durability.

However, in order to couple the spacer to the reinforcing bar, a coarse iron wire is required, and there is also a hassle to be fixed after bending the coarse iron wire to bind the reinforcing bar and inserting it into a wire groove or a wire hole. And, because of the weight can be separated from the rebar there is a limit to achieve a predetermined purpose. As an alternative to overcome this, the spacer may be made of plastic or iron. The plastic or steel spacer is light in weight and easy to install, and does not fall out or fall out of the rebar. On the other hand, due to its weak strength, breakage and deformation may occur, and its fire resistance may be weak, causing fire passage. In addition, a gap is generated due to heterogeneity with the concrete, and moisture is sucked from the outside through the gap, causing a problem in that the steel is corroded.

Therefore, the property that an ideal spacer should have can be summarized as follows.

First, spacers coupled to the reinforcing bars to maintain a certain distance between the reinforcing bars and the formwork should not be peeled off or pulled out until the concrete is placed. This requires that the material of the spacer have the same physical or chemical properties as the concrete.

Second, construction should be easy. There should be no hassle to fix with bolts or wires to join spacers to rebar.

Third, the thermal conductivity should be small. As described above, materials having excellent heat resistance and low thermal conductivity, such as concrete, should be used.

Fourth, it must be resistant to oxidation. Oxidizing materials should be used to maintain the gap between the outer walls of the building and the rebar and to prevent the reinforcing bars from being oxidized.

Accordingly, the present invention is to solve the above problems, by combining the two members formed by bending each other using an elastic connecting member, by inserting and fixing the reinforcing bars in the receiving space formed in the direction in which the two members, The present invention provides a spacer capable of stably coupling the spacer and the reinforcing bar without the need for a separate tight iron for fixing the spacer and the spacer.

Still another object of the present invention is to provide a spacer, which uses a material having the same physical and chemical properties as that of concrete, thereby ensuring durability and strength and having good fire resistance, thereby preventing heat transfer in a fire.

Another object of the present invention is to provide a spacer which is easy to manufacture, easy to repair and manage, and low in manufacturing cost due to the simple structure.

According to a preferred embodiment of the present invention for achieving the above object of the present invention, the spacer of the present invention includes a first member formed by bending, a second member formed corresponding to the first member, the first member The member and the second member are coupled to each other via a connecting member. In addition, the connection member may penetrate the first member and the second member, and may bundle the connection member protruding from the members after the penetration.

An accommodation space is formed inside the first member and the second member. The accommodation space may be expanded or reduced by increasing or decreasing the distance between the first member and the second member with respect to the connection member. Reinforcing bars may be inserted into the accommodation space, and protrusions having a sharp shape in the direction of the accommodation space are formed at one end of the first member and the second member so as to prevent the reinforcement inserted into the accommodation space from being separated.

The connecting member is preferably made of a material having high elasticity, and is bent in a bow shape and connected to one end of the first member and the second member. In addition, the connection member may be formed in the 'X' type. The first member and the second member are respectively connected to two ends of the connection member, and the first two members and the first member are brought closer or further away from each other by the user, such as when using scissors or tongs. The distance between two members can be enlarged or narrowed.

In this way, the two members formed by bending can be joined to each other by a connecting member to insert reinforcing bars into the receiving space formed therebetween, and in particular, by tightening the reinforcing bars inserted into the receiving space using the connecting member made of elastic material. The bond can be maintained as long as the external force for direct departure of the reinforcing bar is not only applied, but also the durability is maintained using the same material as the concrete filled in the formwork, and serves as an inner covering in the event of fire.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited or limited by the embodiments. The spacer of the present invention can be used in various applications not only for buildings but also for civil engineering and all fields of construction.

Figure 3 is a plan view showing a spacer connected to the connecting member of the present invention.

As shown in the drawing, the spacer 100 includes a first member 120 and a second member 130, and the first member 120 and the second member 130 are bent to be symmetric with each other. . In addition, the first member 120 and the second member 130 forms a receiving space 110 into which the reinforcing bars can be inserted in a direction facing each other due to the curved shape. One connecting member 140 is connected to one end of each of the first member 120 and the second member 130, and the connecting member 140 is preferably a spring having a central portion bowed in a bow shape. In addition, the connection member 140 may penetrate the first member 120 and the second member 130 in the longitudinal direction, and a portion of the connection member 140 may protrude toward the inlet of the accommodation space 110. In addition, protrusions 125 and 135 are formed at one end of the first member 120 and the second member 130 toward the accommodation space 110, respectively.

  The first member 120 and the second member 130 may tighten any of the reinforcing bars inserted into the accommodation space 110 by the connection member 140. In this embodiment, the accommodation space 110 may be tightened. ) Can be fixed by inserting the longitudinal root 50 disposed perpendicular to the transverse muscle 52. In this case, the connection member 140 may penetrate the first member 120 and the second member 130, and may protrude a portion protruding toward the inlet of the accommodation space 110, thereby accommodating the accommodation space. The rebar inserted into the 110 may be prevented from being separated.

The protrusions 125 and 135 serve to guide the longitudinal muscles 50 to be easily inserted into the accommodation spaces 110, and the longitudinal muscles 50 inserted into the accommodation spaces 110 are located in the accommodation spaces 110. It serves to prevent the accommodation space 110 to exit.

Figure 4 is a plan view showing a spacer connected to the connecting member of the forceps type as another embodiment of the present invention.

As shown in the drawing, the spacer 200 has a tong-shaped connecting member formed between the first member 220 and the second member 230. The first member 220 and the second member 230 are bent in different directions, and a receiving space 210 for receiving reinforcing bars is formed therebetween.

The clamp-type connecting member 245 includes a first connecting member 240 coupled to the first member 220 and a second connecting member 250 coupled to the second member 230. The first connection member 240 and the second connection member 250 may penetrate the first member 220 and the second member 230 in the longitudinal direction. In addition, as shown in FIG. 4, one end of the first connection member 240 is coupled to one end of the first member 220, and one end of the second connection member 250 is the second member 230. Is combined with one end.

The first connection member 240 and the second connection member 250 are connected to each other by the coupling unit 260 at the point where they cross each other. The coupling unit 260 includes a connection pin 262 for coupling the first connection member 240 and the second connection member 250, and an elastic body 264 to provide an elastic force. The first member 220 and the second member 230 may be rotated with respect to the connecting pin 262, and inserted into the receiving space 210 by using the elastic force of the elastic body 264. You can tighten the rebar. In the present embodiment, the longitudinal muscle 50 is inserted into the receiving space 210 perpendicular to the transverse muscle 52.

When the user grips both ends of the first connection member 240 and the second connection member 250 by using a hand, the entrance and exit of the accommodation space 210 is expanded. The longitudinal muscle 50 is inserted through the entrance and exit of the expanded accommodation space 210. When the hand holding the first connection member 240 and the second connection member 250 is released, the longitudinal muscle 50 inserted into the accommodation space 210 is fixed by the restoring force of the elastic body 264. The elastic body 264 preferably uses a circular spring. The first connection member 240 and the second connection member 250 protruding toward the inlet of the accommodation space 210 are prevented from being separated from each other so that the longitudinal muscle 50 inserted into the accommodation space 210 is separated from each other. Can be.

In this case, the protrusions 222 and 232 formed at one end of the first member 220 and the second member 230 guide the longitudinal muscle 50 to be inserted into the accommodation space 210 well. The longitudinal muscle 50 inserted into the accommodation space 210 may be prevented from escaping out of the accommodation space 210.

In this way, by inserting and fixing the reinforcing bar in the receiving space formed between the two members of the curved form, there is no need for a tight iron to tie the separate reinforcing bar. In addition, by tightening the reinforcing bar inserted into the receiving space by using a connecting member having an elastic force, not only can increase the coupling force between the spacer and the rebar, but also the structure is simple, easy to manufacture, and can be conveniently installed and utilized. In addition, durability can be ensured by using materials having the same physical and chemical properties as concrete filling the formwork with the members.

As described above, according to the present invention, by combining the two curved members to be symmetrical to each other, by inserting the reinforcing bar into the receiving space formed inside the symmetry plane to reliably bind the reinforcing bar and the reinforcing bar, and to maintain a constant gap with the formwork It works.

In addition, by tightening the reinforcing bars inserted into the receiving space by using an elastic member such as a spring, there is no need for a separate member such as a fastening iron for joining the spacer and the reinforcing bar can be used simply.

In addition, by using the same physical and chemical properties of the same material as the concrete filled in the formwork, the spacer can be bonded well to the concrete without a surface finish, durability is ensured, and moisture can be prevented from penetrating into the spacer. In addition, it is excellent in fire resistance and can act as a fire protection coating in case of fire, preventing the reinforcement inserted into the concrete from being softened from high heat and preventing the collapse of buildings or structures.

In addition, due to the simple structural characteristics, the manufacturing process is simple, which is advantageous for mass production, and there is an effect that a user can use it easily and conveniently even in construction or construction sites.

As described above, although described with reference to the preferred embodiment of the present invention, those skilled in the art various modifications and variations of the present invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

Claims (6)

In the spacer coupled to the reinforcing bars and formwork or to maintain the spacing of the reinforcing bars and reinforcing bars, A first member formed by bending; A second member bent and formed to correspond to the first member; And A connecting member penetrating in the longitudinal direction to connect the first member and the second member, both ends protruding to the ends of the first member and the second member, thereby connecting the reinforcing bar and the spacer by tightening the protruding portion; Wherein the first member and the second member form a receiving space therebetween, and the reinforcing bar is inserted into the receiving space. The method of claim 1, The connecting member protrudes through the first member and the second member, the spacer, characterized in that for coupling the protruding connection member. delete The method of claim 1, The connecting member further includes a tongs-type connecting member, and the tongs-type connecting member is an 'X' shaped tong, the end of which is coupled to the ends of the first member and the second member, respectively, and the tongs-type connecting member. Pressing the other end of the spacer, characterized in that the receiving space is expanded by the forceps operation. The method of claim 1, The other end of each of the first member and the second member is formed with a protrusion protruding inward, wherein the protrusion is protruded so as to be inclined in the direction in which the reinforcing bar is inserted. The method of claim 1, And the first member and the second member are formed of cement mortar or concrete.

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