KR20180127696A - End part gripping device for iron bar and iron bar connecting device using the same - Google Patents

Abstract

Disclosed are an iron bar end part gripping device gripping the rear end part of an iron bar and an iron bar connecting device using the same. The iron bar end part gripping device according to an embodiment of the present invention includes a casing having a screw thread-formed inner periphery, a base portion disposed inside the rear end part of the case and having a rear hole such that the iron bar is partially inserted from the front, and a cover portion including a plurality of wedges disposed in front of the base portion and surrounding the outer periphery of the iron bar partially inserted into the rear hole, a cover having a front hole through which the iron bar passes, and a wedge guide member protruding rearward from the front hole circumference of the cover and screw-coupled to the inner periphery of the case. The wedge and the wedge guide member can be provided such that the wedge can be wedge-coupled between the wedge guide member and the iron bar partially inserted into the rear hole as the wedge guide member moves rearward.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a reinforcing end gripping device,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a reinforcing end gripping mechanism and a reinforcing joint using the same.

The principle of reinforcing bars is not to follow. However, since the length of the reinforcing bar is limited, there is a case inevitably. Conventional methods of joining reinforcing bars include lap joints, welded joints, and mechanical joints by couplers.

Mechanical joints are mainly used for joints of large-diameter reinforcing bars. In general mechanical joints, a screw machining method is used in which the ends of the reinforcing bars are screwed and connected by a coupler or the like. However, in the case of such a screw working method, since it is necessary to cut the surface of the reinforcing bar or form a screw on the end of the reinforcing bar by compression molding after inflating or reducing the cross section of the reinforcing bar by applying heat or external force to the reinforcing bar, , High-strength steel bars). In addition, in the case of the method for exhibiting the joint performance by filling the mortar inside the sleeve connecting the reinforcing bars, the workability is limited due to the inconvenience of the field work due to the mortar filling.

The background technology of the present application is disclosed in Korean Patent Registration No. 10-1039120 (registered on May 30, 2011).

The present invention has been made to solve the above problems of the prior art and provides a reinforcing bar end gripping device capable of gripping a reinforcing bar with strong binding force and interconnecting two reinforcing bars without additional threading of the reinforcing bar end, .

It should be understood, however, that the technical scope of the embodiments of the present invention is not limited to the above-described technical problems, and other technical problems may exist.

According to an aspect of the present invention, there is provided a mechanism for gripping a rear end portion of a reinforcing bar, the case including a screw thread formed on an inner circumference of the case, A cover having a rear portion formed with a rear hole into which the reinforcing bars are partially inserted, a cover disposed in front of the base portion and including a plurality of sheets surrounding the outer periphery of the reinforcing bars partially inserted into the rear holes, And a cover portion protruding rearward from a periphery of the front hole of the cover and screwed to the inner circumference of the case, wherein the wedge and the wedge guide member are movable in the backward direction of the wedge guide member, A wedge joint is provided between the guide member and the reinforcing bars partially inserted into the rear holes .

According to an embodiment of the present invention, an intermediate hole through which the reinforcing bar is passed may be formed, and a support may be further provided to support a rear end of the web with respect to a front end of the base.

According to an embodiment of the present invention, the support portion may include a support member in which the intermediate hole is formed, a front surface around the middle hole is in contact with a rear end of the paper, and a support member having a rear end of the paper, And an elastic member that elastically supports within the distance.

According to one embodiment of the present invention, the support portion further includes a guide member for guiding the backward movement of the support member, and the guide member extends rearward from the rear portion around the middle hole of the support member, May be at least partially in contact with the inner circumference of the hole.

According to one embodiment of the present invention, the predetermined compression distance may be a distance between a front end of the base portion and a rear portion of the support member in a state where the elastic member is uncompressed.

According to an embodiment of the present invention, the preset compression distance may be set shorter than the length of the rear hole of the base portion.

According to an embodiment of the present invention, a plurality of guide protrusions are formed radially in correspondence with the plurality of sheets on the front portion of the support member, and guide grooves for inserting the guide protrusions are formed at the rear ends of the plurality of spurs, respectively .

According to an embodiment of the present invention, the guide groove may be formed in a hole shape that opens in a radial direction.

According to an embodiment of the present invention, the image forming apparatus may further include an elastic ring surrounding the outer surface of the plurality of sheets so as to press the plurality of sheets to the intermediate hole side, wherein the outer surface of the sheet and the inner surface of the sheet guide member May be formed as oblique sloped surfaces so that a wedge action can be performed when mutual contact is made.

According to an embodiment of the present invention, when the guide protrusion is inserted back into the guide groove, the guide protrusion is detachable from the guide groove when the guide protrusion is moved backward. By the action of the backward force of the pressing force of the elastic ring, The deviation of the bag from the member can be prevented.

According to one embodiment of the present invention, a spacer is disposed in the plurality of fingers to limit movement of the plurality of fingers in the inner radial direction before inserting the reinforcing bars, And can be moved to the rear hole side.

According to an embodiment of the present invention, the sum of the length of the spacer and the distance between the front end of the base portion and the rear portion of the support member in the uncompressed state of the elastic member may be shorter than the length of the rear hole of the base portion.

According to an embodiment of the present invention, an attachment protrusion may be formed on the outer circumference of the case to improve adhesion with concrete.

According to one embodiment of the present invention, the base portion may include a base plate and a connection portion protruding forward from the base plate and screwed into the inner circumference of the rear end of the case.

The reinforcement joint according to one embodiment of the present invention includes two reinforcing end gripping mechanisms according to one embodiment of the present invention, wherein the two reinforcing end gripping mechanisms can be symmetrically connected such that the base plates face each other .

According to one embodiment of the present invention, the base plate of any one of the two reinforcing end gripping mechanisms and the other base plate of the two reinforcing end gripping mechanisms may be a single integrated base plate.

The structure according to one embodiment of the present invention may include a reinforcing joint according to an embodiment of the present invention and a plurality of reinforcing bars connected by the reinforcing joint.

The above-described task solution is merely exemplary and should not be construed as limiting the present disclosure. In addition to the exemplary embodiments described above, there may be additional embodiments in the drawings and the detailed description of the invention.

According to the above-mentioned problem solving means of the present invention, since the reinforcing bars can be gripped with strong binding force without additional threading of the ends of the reinforcing bars by the wedge connection through the wedge, a reinforcing end gripping mechanism capable of greatly improving the workability A reinforcing joint may be provided.

Also, by the elastic restoring force of the elastic member, a pressing force for wedge bonding is additionally applied to the woven fabric even after the reinforcing bars are inserted, so that the reliability of the fixing of the reinforcing bars can be more clearly ensured, and a reinforcing bar coupling device using the same is provided .

FIG. 1A is a view showing a configuration of a reinforcing end gripping mechanism according to an embodiment of the present invention. FIG.
FIG. 1B is a view showing an embodiment in which a case and a base are integrally provided in a reinforcing end gripping mechanism according to an embodiment of the present invention.
FIG. 2 (a) is a cross-sectional view taken along the longitudinal direction of the bobbin of the reinforcing end gripping mechanism according to one embodiment of the present invention, and FIG. 2 (b) As viewed from the radially outer side.
3 is a view (a side view and a rear view) showing a configuration of a cover portion of a reinforcing end gripping mechanism according to an embodiment of the present invention.
FIG. 4 is a view illustrating a state in which a reinforcing bar is inserted into a reinforcing end gripping mechanism according to an embodiment of the present invention, a cover is screwed to the case, and the elastic member is fully compressed.
5A and 5B are views for explaining the length of the rear hole and the setting of the compression distance of the elastic member in consideration of the configuration of the spacer in the reinforcing end gripping mechanism according to the embodiment of the present invention.
6 is a view showing a configuration of a support part of a reinforcing end gripping mechanism according to an embodiment of the present invention.
FIG. 7A is a view illustrating a state in which a support is attached to a support of a reinforcing end gripper according to an embodiment of the present invention.
FIG. 7B is a view showing a part of a plurality of fingers separated (disassembled) from a supporting portion of the reinforcing end gripper according to the embodiment of the present invention.
FIG. 8 is a view for explaining force components acting on the fingers by the elastic ring in the reinforcing end gripping mechanism according to the embodiment of the present invention; FIG.
FIG. 9 is a diagram (side view and front view) showing the configuration of a symmetrically formed base portion of a reinforcing bar coupling according to an embodiment of the present application. FIG.
FIG. 10 is a view showing a structure of a reinforcing bar coupling according to an embodiment of the present invention, with reinforcing bars interconnected through the reinforcing bars before wedge joining.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. It should be understood, however, that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, the same reference numbers are used throughout the specification to refer to the same or like parts.

Throughout this specification, when a part is referred to as being "connected" to another part, it is not limited to a case where it is "directly connected" but also includes the case where it is "electrically connected" do.

It will be appreciated that throughout the specification it will be understood that when a member is located on another member "top", "top", "under", "bottom" But also the case where there is another member between the two members as well as the case where they are in contact with each other.

Throughout this specification, when an element is referred to as "including " an element, it is understood that the element may include other elements as well, without departing from the other elements unless specifically stated otherwise.

FIG. 1A is a view showing a configuration of a reinforcing end gripping mechanism according to an embodiment of the present invention. FIG.

A reinforcing end gripping mechanism (hereinafter referred to as a " reinforcing end gripping mechanism ") according to an embodiment of the present invention relates to a device for gripping a rear end portion of a reinforcing bar 1. Referring to FIG. 1A, the rear end of the reinforcing bar 1 may refer to an end portion of the reinforcing bar 1 at 9 o'clock direction inserted into the reinforcing end gripping mechanism. Further, for example, the reinforcing bar 1 may be made of a deformed iron, but is not limited thereto.

For reference, the 9 o'clock direction may be rearward and the 3 o'clock direction may be forward with reference to Fig. 1a. In other words, it can be understood as a concept that a reinforcing bar is inserted from the front to the rear in the reinforcing end gripping mechanism. However, the reinforcing end gripping mechanism is not always limited to being arranged in the forward and backward directions. For example, the reinforcing end gripping mechanism may be arranged in various directions depending on the necessity (fabrication conditions or construction conditions) such that the reinforcing end gripping device is arranged such that the forward and backward directions are directed upward and downward, or the forward and backward directions are oriented in an oblique direction Of course.

10, two reinforcing end gripping mechanisms may be provided, and a reinforcing joint device according to an embodiment of the present invention may be provided in a configuration in which the rear surfaces of the reinforcing end gripping mechanisms are in contact with each other and are symmetrical have. The two reinforcing bars may be interconnected by a reinforcing bar coupling device in which the two reinforcing bar end gripping devices each grip the rear end of the reinforcing bar.

Referring to FIG. 1A, a reinforcing end gripping mechanism may include a case 10, a base 100, a plurality of fingers 300, and a cover 400. Further, the reinforcing end gripping mechanism may include the support portion 200. [

The case 10 may have a thread 11 formed on its inner periphery. Illustratively, the thread 11 may be formed at the front end and the rear end of the case 10. For example, the thread 11 may be formed in the form of a female screw.

Referring to FIG. 1A, an attachment protrusion 12 may be formed on the outer circumference of the case 10 to improve adhesion with concrete. Illustratively, the attachment protrusions 12 may be formed in the shape of a ring-like projection extending along the circumferential direction. Further, a plurality of attachment protrusions 12 may be provided. Referring to FIG. 1A, a plurality of attachment protrusions 12 may be disposed at mutually spaced intervals along the longitudinal direction. As the attachment protrusion 12 is formed on the outer periphery of the case 10, adhesion with concrete can be improved.

The base portion 100 may be disposed inside the rear end portion of the case 10.

1A, the base portion 100 may be coupled to the inside of the rear end portion in such a manner that the base portion 100 is threadedly engaged with the threaded portion 11 formed on the inner periphery of the rear end portion of the case 10. Specifically, the base portion 100 may include a connecting portion 120 that is screwed with the inner circumference of the case 10. Illustratively, a male thread-like thread may be formed on the outer circumference of the connection portion 120. Referring to an enlarged view of the lower left end of FIG. 1A, a thread of the connection part 120 can be screwed with a thread 11 of a female screw shape formed on the inner periphery of the rear end of the case 11.

In addition, the base portion 100 may include a base plate 110. The base plate 110 may be provided at an outer circumference larger than the outer circumference of the connection portion 120 so that the entirety of the base portion 100 is not inserted into the case 11 by the screw connection of the connection portion 120 . That is, the base plate 110 may limit the amount of screw connection between the connection part 120 and the inner circumference of the rear end of the case 10 by a predetermined amount. The connection portion 120 may protrude forward from the base plate 110.

Also, the base portion 100 may be formed with a rear hole 101 into which the reinforcing bars 1 are partially inserted from the front. 1A, the rear end of the reinforcing bar 1 inserted through the cover part 400 can be inserted up to the rear hole 101 of the base part 100. As shown in FIG.

FIG. 1B is a view showing an embodiment in which a case and a base are integrally provided in a reinforcing end gripping mechanism according to an embodiment of the present invention.

Referring to FIG. 1B, as one embodiment of the reinforcing end gripping mechanism, the base portion 100 and the case 10 may be provided in an integrated form from the beginning without being screwed to each other if necessary .

FIG. 2 (a) is a cross-sectional view taken along the longitudinal direction of the bobbin of the reinforcing end gripping mechanism according to one embodiment of the present invention, and FIG. 2 (b) As viewed from the radially outer side.

A plurality of wafers 300 may be provided. 1A, the woven fabric 300 may surround the outer circumference of the reinforcing bar 1 disposed in front of the base portion 100 and partially inserted into the rear hole 101. Referring to FIG. 2A, the protrusion 340 protruding inward may be formed on the contact surface (inner circumferential surface) of the reinforcing bar 1 of the woven fabric 300. Referring to FIG. 2 (a), the protrusions 340 may be formed to extend along the circumferential direction. Further, the protrusions 340 may be formed repeatedly in a back-and-forth direction (a direction of 3 o'clock-9 o'clock in reference to Fig. 2 (a)). Further, the protrusion 340 may be a wedge protruding obliquely toward the rear (9 o'clock reference in Fig. 2 (a)) or a deflected saw blade shape. That is, the projection 340 is a wedge or a deflected saw blade shape, which facilitates the movement of the woven fabric 300 when the woven fabric 300 is to move forward (at the reference 3 o'clock direction in FIG. 2A) And when it is intended to move backward, the wedge effect that limits its movement to the maximum can be exhibited. According to the pile 300 having the protrusions 340, the pile 300 contacts the reinforcing bar 1 in a state where the protrusion 340 contacts the reinforcing bar 1 or presses the reinforcing bar 1 radially inward. While it is easy to move relatively forward, the movement of the wafers 300 relative to the reinforcing bars 1 in the rearward direction can be restricted, so that the gripping of the reinforcing bars can be made more reliably. In particular, when the reinforcing bar 1 is a deformed reinforcing bar, the coupling of the protrusions 340 to the concave-convex surface of the deformed reinforcing bar is such that the deforming reinforcing bar is moved forward relative to the flange 300 Which is relatively moved backward with respect to the backward direction).

3 is a view showing a configuration of a cover portion of a reinforcing end gripper according to an embodiment of the present invention. 3 (a) is a side view of the cover portion viewed from the side (radially outward), and FIG. 3 (b) is a front view of the cover portion seen from the back (rear) side.

Referring to FIG. 3, the cover portion 400 may include a cover 410 and a bag guide member 420. Illustratively, the cover 410 may be formed with a front hole 401 through which the reinforcing bar 1 passes. For example, the cover 410 may be provided in the form of a circular plate having a front hole 401 formed in the middle in the front-rear direction. Further, as shown in Fig. 3 (b), the front hole 401 can be formed in a circular shape through which the reinforcing bar 1 can pass.

Referring to FIG. 1A, the guide member 420 may protrude rearward from the front hole 401 of the cover 410. Referring to FIG. 3, the tooth guide member 420 may be formed to extend continuously along the circumferential (circumferential) direction. For example, as shown in FIG. 3, the bag guide member 420 may be provided in a cylinder (ring) shape whose thickness decreases toward the rear. However, the shape of the tooth guide member 420 is not limited to the cylinder shape continuously extending along the circumferential direction. 6, 7A, and 7B, three guide members 420 may be provided corresponding to the wafers 300. As shown in FIG. That is, a plurality of the guide members 420 may be provided in the number, position, and shape corresponding to the wafers 300 one-to-one. As another example, each of the four guide members 420 and 300 may be provided.

1, the tooth guide member 420 can be screwed to the inner circumference of the case 10. More specifically, the cover portion 400 is formed so that the outer peripheral portion of the tooth guide member 420 is screwed to the thread 11 formed on the inner periphery of the front end portion of the case 10, And can be arranged to be inserted into the inner side. Illustratively, a male thread-like thread may be formed on the outer periphery of the tooth guide member 420. A thread line formed on the outer periphery of the flange guide member 420 can be screwed to a threaded thread 11 in the form of a female screw formed on the inner periphery of the front end portion of the case 11.

FIG. 4 is a view illustrating a state in which a reinforcing bar is inserted into a reinforcing end gripping mechanism according to an embodiment of the present invention, a cover is screwed to the case, and the elastic member is fully compressed.

The woven fabric 300 and the woven fabric guide member 420 are arranged between the reinforcing rods 1 which are partially inserted into the woven fabric guiding member 420 and the rear bore 101 along with the backward movement of the woven fabric guiding member 420 Can be wedge-coupled. 4, the wedge joint is a wedge joint in which the oblique inner surface (inner circumferential surface) of the wedge guide member 420 is at least partially in contact with the oblique outer surface (outer circumferential surface) of the wedge 300, As the guide member 420 moves backward, the pile 300 is fitted between the reinforcing bar 1 and the pile guide member 420, and a high pressure is gradually applied to the inner and outer surfaces of the pile 300, (A progressive interference fit or a high friction fit seal by pressurization) in which the woven fabric 300 is fastened between the reinforcing bar 1 and the bare guide member 420 can do.

The outer surface of the woven fabric 300 may be formed of a material that increases the surface roughness so that wedge bonding with the woven fabric guide member 420 may be performed with a stronger binding force. For example, a material having a high surface roughness can be selectively adopted in the production of the woven fabric 300. In addition, the outer surface of the woven fabric 300 can be subjected to surface treatment, surface coating treatment, or the like in the direction of increasing the surface roughness.

As another example, although not explicitly shown in the drawing, protrusions 340 of the same or corresponding form to the protrusions 340 formed on the inner surface of the woven fabric 300 shown in FIG. 2 (protrusions A protruding wedge or a deflected saw blade-shaped protrusion) may be repeatedly formed along the forward and backward directions. In correspondence with the projections on the outer surface of the woven fabric 300, a wedge-shaped projection projecting obliquely forward can be repeatedly formed on the inner side surface of the woven guide member 420 along the forward and backward directions. In other words, the outer surface protrusion of the woven fabric 300 protrudes outward obliquely toward the rear, and the inner surface protrusion of the woven guiding member 420 can protrude inwardly toward the front in an oblique direction. The wedge 300 is allowed to move forward relative to the wedge guide member 420 only in the wedge engagement state where the outer side projections of the wedge 300 and the inner side projections of the wedge guide member 420 are mutually engaged, The guide member can be allowed to move only rearward relative to the bag), so that more strong binding and bonding can be achieved.

Referring to FIG. 1A, when the wire guide member 420 is screwed to the case 10 in a state where the reinforcing bar 1 is inserted up to the rear hole 101, The wedge guide member 420 is further brought into surface contact with the wedge 300 so that the wedge 300 is further pressed and moved toward the reinforcing bar 1 side. 4, when the support member 200 including the elastic member 220 supports the woven fabric 300, the woven fabric 300 is compressed while the elastic member 220 is compressed, The elastic member 220 can be pushed backward by the compressed distance.

4 illustrates a state in which the support member 210 of the support unit 200 abuts against the end of the protruding member 130 corresponding to the end of the base unit 100, Fig. 5 is a view showing a state of being compressed to the maximum within a possible distance range. Fig. 4, when the elastic member 220 is at least partially compressed and the tooth guide member 420 simultaneously satisfies the state where the screw connection with the case 10 is completed, It is preferable that the shape of the woven fabric 300 and the shape of the woven guiding member 420 are set so that the woven fabric guide member 420 and the reinforcing bar 1 are at least partially in contact with each other. This configuration allows the woven fabric 300 to be wedged between the bare guide member 420 and the reinforcing bar 1 when the elastic restoring force of the elastic member 220 is applied forward (at 3 o'clock in FIG. 4) Or a high friction fit engagement by pressurization).

Referring to FIGS. 1A and 4, the woven fabric 300 may have a shape such that its overall thickness (thickness in the vertical direction of FIG. 4) decreases toward the front (in the direction of 3 o'clock in FIG. 4). On the contrary, the guide member 420 may be formed in such a shape that its overall thickness becomes smaller toward the rear (9 o'clock in FIG. 4). The inner surface of the woven fabric 300 can be extended without being inclined along the longitudinal direction corresponding to the outer circumferential surface (surface) of the reinforcing bar 1. The outer surface of the woven fabric 300 can be formed as the woven fabric 300 moves forward, The inclined surface may be formed in a shape of an oblique sloped surface so that the thickness of the inclined surface is reduced. The inner side surface of the guide member 420 may be formed in the form of an inclined surface inclined obliquely so that the thickness of the guide member 420 decreases toward the rear side. That is, the outer surface of the woven fabric 300 and the inner surface of the woven fabric guide member 420 may be formed as oblique slopes so that wedge action can be achieved when they contact each other. Illustratively, the inclined inclination of the outer surface of the woven fabric 300 may have an inclination angle corresponding to the inclined inclination of the inner surface of the woven guiding member 420. According to this tilt angle setting, a larger amount of surface contact can be made between the outer surface of the woven fabric 300 and the inner surface of the woven material guide member 420, and a high friction fit- Can be grasped more firmly.

4, the thickness of the front end portion of the woven fabric 300 (at the reference 3 o'clock direction end of Fig. 4) is larger than the distance between the rear end portion of the inner surface of the wool guide member 420 and the reinforcing bar 1 It is preferable to set it to a large value. The thickness of the front end of the flange 300 is set to be larger than the minimum value of the interval between the inner surface of the flange guide member 420 and the reinforcing bar 1, And the resilient restoring force of the elastic member 220 can be made gradually.

As the backward movement of the bag guide member 420 progresses, the inclined surface of the bag 300 and the inclined surface of the bag guide member 420 come into contact with each other and press each other. As a result, the wedge effect (progressive interference fit or high friction Fitting effect) is generated and the reinforcing bar 1 can be restrained.

Referring to FIG. 1A, an intermediate hole 201 through which a reinforcing bar 1 passes may be formed in a support part 200. Further, the support part 200 can support the rear end of the woven fabric 300 with respect to the front end of the base part 100. The support portion 200 may include a support member 210, an elastic member 220, and a guide member 230.

The intermediate hole 201 may be formed in the support member 210. In addition, the support member 210 can be brought into contact with the rear end of the woven fabric 300 at the front surface around the intermediate hole 201. The support member 210 is inserted into the guide groove 320 at the rear end of the wedge 300 to restrict movement of the wedge 300 in the circumferential direction (circumferential direction) May be formed. The guide protrusion 240 will be described later in more detail with reference to FIGS. 6, 7A and 7B.

The guide member 230 can guide the support member 210 in the forward and backward directions. Referring to FIG. 1A, the guide member 230 may extend rearward from the rear portion of the support member 210 around the intermediate hole 201. The guide member 230 may be formed to be at least partially in contact with the inner circumference of the rear hole 101. 1A, the rear hole 101 may extend to the inside of the protruding member 130 of the base portion 100, and the guide member 230 may be formed inside the protruding member 130 They can be arranged in a form to be inserted.

Referring to FIG. 1A, the elastic member 220 can elastically support the rear end of the woven fabric 300 with respect to the front end of the base portion 100 within a predetermined compression distance. Here, the predetermined compression distance may be a distance between the front end of the base portion 100 (the front end of the reference protruding member 130 in Fig. 1A) and the rear portion of the supporting member 210 in the uncompressed state of the elastic member 220 have.

More specifically, the predetermined compression distance may be a distance indicated by a reference character b in Fig. 5B. Further, the elastic member 220 may be a spring extending in a coil shape (spiral shape). When the elastic member 220 is a spring as described above, a hole through which the reinforcing bar 1 passes can be naturally formed by the inner space formed by the coil shape (spiral shape). Illustratively, referring to FIG. 1A, the front end of the base portion 100 may be entirely single of the protruding member 130. That is, at the front end of the connection part 120 in the base part 100, a protrusion member 130 protruding from the connection part 120 is formed so that the rear hole 101 extends from the connection part 120 and can be continuously formed . Referring to FIG. 1A, it is preferable that the protruding member 130 has a shape (thickness) so that the elastic member 220 in the form of a coil spring can be disposed and fixed on the outer circumferential surface of the elastic member 220.

4, when the bough guide member 420 is further moved backward after the bough guide member 420 is at least partly in contact with the bough 300 as the breech guide member 420 is moved backward, The elastic member 220 can be elastically compressed within a predetermined compression distance b. In other words, the woven fabric 300 may be said to be moved backward at the maximum when the back surface of the support member 210 is moved until it contacts the front end of the protruding member 130. When the woven fabric 300 is moved backward while compressing the elastic member 220 within a predetermined compression distance range, the elastic restoring force of the elastic-compressed elastic member 220 is reversely applied to the wool 300 The wedge 300 is engaged with the wedge guide member 420 and the reinforcing bar 1 while the beveled face of the wedge 300 and the beveled face of the wedge guide member 420 are pressed against each other, A high frictional engagement by pressurization) can be achieved.

5A and 5B are views for explaining the length of the rear hole and the setting of the compression distance of the elastic member in consideration of the configuration of the spacer in the reinforcing end gripping mechanism according to the embodiment of the present invention.

5A and 5B, the predetermined compression distance b may be set to be shorter than the length a of the rear hole 101 of the base portion 100. [ 5A, the previously set compression distance b may be set to a short distance from the front end of the projecting member 130 to the rear end of the connecting portion 120. In this case, as shown in FIG. The rear end of the reinforcing bar 1 is separated from the rear hole 101 and positioned inside the woven fabric 300 through the relative setting of the length of the rear hole 101 with respect to the compression distance of the elastic member 220, The possibility that the holding of the reinforcing bar 1 by the holding members 300 may become unstable can be largely lowered to almost zero.

In this regard, let's assume that the elastic member 220 is elastically compressed by b and then resiliently restored by b again, assuming a somewhat extreme condition (only one possibility is that there is a very slight possibility of occurrence). In this case, the reinforcing bars 1 may be moved forward again (b 3 o'clock in FIG. The rear end of the reinforcing bar 1 may be displaced from the rear hole 101 and the rear end of the reinforcing bar 1 may be located at the inner side of the wale 300. In this case, As shown in FIG. If the rear end of the reinforcing bar 1 is positioned at the inner middle portion of the woven fabric 300, since the reinforcing bar 1 can not be completely gripped by pressing and friction of the inner surface of the woven fabric 300, (1) It may be difficult to completely eliminate the possibility that the binding force and the reliability in the grip are lowered. Therefore, by setting the length a to be longer than b, it is possible to stably form a condition in which all (almost) inner surfaces of the woven fabric 300 can be brought into contact with the outer peripheral surface (outer surface) of the reinforcing bar 1. [

6 is a view showing a configuration of a support portion of a reinforcing end gripping mechanism according to an embodiment of the present invention. FIG. 7A is a view illustrating a state in which a support is attached to a supporting portion of a reinforcing end gripping mechanism according to an embodiment of the present invention. FIG. 7B is a cross- (Disassembled) from the surface of the substrate.

Referring to FIG. 6, a plurality of guide protrusions 240 may be formed radially corresponding to the plurality of fingers 300 on the front surface of the support member 210. Referring to FIGS. 6 and 7A together, the guide protrusions 240 may be provided in a number corresponding to the number of one-to-one correspondence with the wafers 300. For example, the plurality of guide protrusions 240 may be provided in correspondence with three (three pieces) of the wipes 300. As another example, if the wafers 300 are four (four pieces), the number of the guide protrusions 240 can also be four. The plurality of guide protrusions 240 may be spaced apart from each other at equal intervals (constant intervals) in the circumferential direction so as to more uniformly hold the reinforcing bars 1 in all directions. For example, when there are three guide protrusions 240, the distance between the guide protrusions 240 may be 120 degrees.

Referring to FIGS. 7A, 7B, and 2, a guide groove 320 may be formed at a rear end of each of the plurality of wafers 300, into which the guide protrusion 240 is inserted. Referring to FIGS. 7B and 2, the guide groove 320 is formed in a radial direction (a direction perpendicular to the reference plane shown in FIG. 2 (a) A normal direction). That is, the guide groove 320 can be regarded as a hole in that it is recessed in the forward direction (in the direction of 3 o'clock in FIG. 2 (a) and 3 (b)) and is formed in the radial direction. As the guide protrusion 240 is inserted into the guide groove 320, the wafers 300 can move along the guide groove 320 in the inner and outer radial directions of the intermediate hole 201 May be disposed on the front surface of the support member 210 in a limited form. Accordingly, the binding force (gripping force or pressing force) by the woven fabric 300 can be applied to the reinforcing bar 1 constantly along the guide groove 320. [

The guide protrusion 240 may be detached from the guide groove 320 when the guide protrusion 240 is moved backward in a state where the guide protrusion 240 is inserted into the guide groove 320. 6 and 7B, the engagement of the guide groove 320 with the guide protrusion 240 simply inserts the guide protrusion 240 into the guide groove 320 when the wedge 300 is moved from the front to the back Can be made simple. For example, the guide protrusion 240 may have a simple polygonal shape such as a square in cross section, and the guide groove 320 may be a simple polygon whose cross section corresponds to the cross-section of the guide protrusion 240. Accordingly, in forming the guide protrusions 240 and the guide grooves 320, complicated machining and manufacturing steps are not necessary, and the manufacturing cost and manufacturing time in the production of the steel rod end gripping mechanism can be greatly reduced.

FIG. 8 is a view for explaining force components acting on the fingers by the elastic ring in the reinforcing end gripping mechanism according to the embodiment of the present invention; FIG.

7A and 8, the reinforcing end gripping mechanism includes an elastic ring 310 surrounding the outer surface of the plurality of fingers 300 so as to press and push the plurality of fingers 300 toward the intermediate hole 201 . The elastic ring 310 can press the plurality of fingers 300 in the direction of the center of the intermediate hole 201. However, as described above, since the woven fabric 300 has an oblique sloped surface on its outer surface in order to have a shape that becomes narrower toward the front, the elastic ring 310 is pressed The force F acts in a direction slightly tilted rearward (9 o'clock in reference to Fig. 8) in the inner radial direction. This pressing force F can be divided into a component force in the inner radial direction (F _{inward direction} ) and a component force in the rearward _direction (F _rearward ). That is, the waetji 300 includes a support member 210 by waetji 300 includes a component force (F _{inside direction)} of the one hand, the rear which is pressed radially inward by the component force (F _{inside direction)} of the radially inward So that it is pressed in a more close direction.

That is, even if the guide protrusion 240 is detachable from the guide groove 320 when the guide protrusion 240 is simply moved backward in a state where the guide protrusion 240 is inserted into the guide groove 320, The backward force (F _backward ) acts on the woven fabric 300, so that the woven fabric 300 can easily maintain contact with the supporting member 210. [ In other words, the release of the woven fabric 300 from the support member 210 can be prevented by the action of the rearward force of the pressing force of the elastic ring 310. Accordingly, the reinforcing end gripping mechanism can be easily carried (moved) in a state where the woven fabric 300 is assembled to the supporting member 210, and when the reinforcing bar 1 is inserted into the reinforcing end holding mechanism, The wafers 300 are not easily separated from each other, so that convenience of installation can be ensured.

2, the plurality of fingers 300 may include a mounting groove 311 on which the elastic ring 310 is mounted. As the mounting groove 311 is provided, the elastic ring 310 can be fixedly mounted at a specific position on the outer surface of the plurality of wipes 300.

5A, 5B, 7A, and 7B, spacers 300 are provided inside the plurality of wafers 300 to limit movement of the plurality of wafers 300 in the inner radial direction before inserting the reinforcing bars 1, (330) may be disposed. Spacer 330 is in the inside with respect to the region corresponding to the elastic ring 310, the pressure force (F) waetji 300, an intermediate hole 201 by a component force (F _inward) in the inward radial direction exerted by the It may be provided to restrict movement. 7A and 7B, the spacer 330 may be provided in a shape having a circular circumferential surface corresponding to the intermediate hole 201. As shown in FIG. Illustratively, the spacer 330 may be in the shape of a cylinder, a disk, a ring (donut or cylinder), or the like.

5A and 5B, the spacer 330 may be moved toward the rear hole 101 as the reinforcing bar 1 is inserted. For this purpose, the spacers 330 are preferably sized to pass through the intermediate hole 201 and the rear hole 101. The spacer 330 supports a part of the inner surface of each of the plurality of fingers 300 and the rear end of the reinforcing bar 1 pushes the spacer 330 backward while the reinforcing bar 1 is inserted from the front to the rear The movement restriction of the plurality of fingers 300 in the inner radial direction by the spacer 330 can be released when the spacer 330 is moved to the intermediate hole 201 or the rear hole 101 side. The plurality of fingers 300 can be moved by at least one of the gradual backward movement of the fingers guide member 420, the elastic restoring force of the elastic member 220, and the inner radial force by the elastic ring 310 It can be moved in the inner radial direction or press the reinforcing bar 1 in the inner radial direction.

When the spacers 330 are provided as described above, the length c of the spacers 330 and the length of the elastic member 220 in the uncompressed state are smaller than the lengths of the front portion of the base portion 100 and the rear portion of the support member 210. [ Is set shorter than the length (a) of the rear hole (101) of the base portion (100). Referring to FIG. 5B, the spacers 330 having a length of c in the forward and backward directions can occupy a space of c when moved to the rear hole 101. Considering the space occupied by the spacer 330 in this way, consideration is given to setting b such that b is shorter than a, and b is preferably set shorter than (a-c).

FIG. 9 is a side view and a front view showing a symmetrically formed base portion of a reinforcing bar coupling according to an embodiment of the present invention, and FIG. 10 is a perspective view illustrating a structure of a reinforcing bar coupling according to an embodiment of the present invention. Fig. 5 is a view showing a state before the wedge joining together with a reinforcing bar interconnected through the wedge.

Referring to Fig. 9, the present invention can provide a reinforcing joint device including two reinforcing end gripping mechanisms. That is, the reinforcing joint according to one embodiment of the present invention may include two reinforcing end gripping mechanisms. The reinforcing end gripping mechanism may be understood to be the same or equivalent to the reinforcing end gripping mechanism according to the embodiment of the present invention described above. Therefore, in the description of the reinforcing joint device according to one embodiment of the present application, the same reference numerals are applied to the same or similar components as those described in the reinforcing end gripping mechanism according to one embodiment of the present application, It will be omitted or briefly explained.

The base portions of the two reinforcing end gripping mechanisms can be symmetrically connected such that the base plates face each other. 9, the base plate of one of the two reinforcing end gripping mechanisms and the other of the two reinforcing end gripping mechanisms are provided as a single integrated base plate 110 . As shown in FIG. 9 (a), the connection part 120 may be provided symmetrically with the front and rear surfaces of the integrated base plate 110. As a result, the reinforcing end gripping mechanism including the connecting portion projecting forward and the reinforcing end gripping mechanism including the connecting portion projecting backward can be symmetrically combined.

Meanwhile, the structure according to one embodiment of the present invention may include a reinforcing joint according to one embodiment of the present invention, and a plurality of reinforcing bars connected by the reinforcing joint. Illustratively, the structure may be, but is not limited to, bridges (e.g., superstructures and substructures of bridges), buildings, underground structures such as culvert, retaining walls, and the like. In other words, it is desirable to understand the structure in this context as a broad concept including all the various structures to which the reinforcing bars are applied. For example, the structure may be a reinforced concrete structure. Since the reinforcing bars and reinforcing bars have been described above, detailed description thereof will be omitted.

It will be understood by those of ordinary skill in the art that the foregoing description of the embodiments is for illustrative purposes and that those skilled in the art can easily modify the invention without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be interpreted as being included in the scope of the present invention.

1: Rebar
10: Case
11: thread
12: Mounting projection
100: Base portion
101: rear hole
110: base plate
120: Connection
130: projecting member
200:
201: Middle hole
210: support member
220: elastic member
230: Guide member
240: guide projection
300:
310: elastic ring
320: Guide groove
330: Spacer
340: projection
400:
401: front hole
410: cover
420:

Claims (17)

A reinforcing bar end gripping mechanism for gripping a rear end portion of a reinforcing bar,
A case in which a thread is formed on an inner circumference;
A base portion disposed inside the rear end of the case and having a rear hole into which the reinforcing bar is partially inserted from the front;
A plurality of fingers disposed in front of the base portion and surrounding the outer periphery of the reinforcing bars partially inserted into the rear holes; And
And a cover portion including a cover formed with a front hole through which the reinforcing bar passes, and a cover guide member protruding rearward from a periphery of a front hole of the cover and screwed to the inner circumference of the case,
Wherein the wedge and the wedge guide member are provided so that the wedge can be wedged between reinforcing bars partially inserted into the wedge guide member and the rear hole in accordance with the backward movement of the wedge guide member. The method according to claim 1,
Further comprising a support portion formed with an intermediate hole through which the reinforcing bar passes and supporting a rear end of the web with respect to a front end of the base portion. 3. The method of claim 2,
The support portion
A support member in which the intermediate hole is formed and a front surface around the intermediate hole is in contact with a rear end of the paper; And
And an elastic member elastically supporting the rear end of the web against a front end of the base portion within a predetermined compression distance. The method of claim 3,
Wherein the support portion further comprises a guide member for guiding the backward movement of the support member,
Wherein the guide member extends rearward from a rear portion of the support member about the middle hole and is at least partially in contact with the inner periphery of the rear hole. The method of claim 3,
Wherein the predetermined compression distance is a distance between a front end of the base portion and a rear portion of the support member in a state where the elastic member is uncompressed. 6. The method of claim 5,
And the predetermined compression distance is set shorter than the length of the rear hole of the base portion. The method of claim 3,
Wherein a plurality of guide protrusions are formed in a front portion of the support member in a radial direction corresponding to the plurality of sheets,
And a guide groove into which the guide protrusion is inserted is formed at a rear end of each of the plurality of springs. In Item 7,
And the guide groove is formed in a hole shape that opens in a radial direction. 8. The method of claim 7,
Further comprising an elastic ring surrounding the outer surface of the plurality of sheets to tighten and press the plurality of sheets to the intermediate hole side,
Wherein an outer side surface of the bag and an inner side surface of the bag guide member are each formed as an oblique sloped surface so that a wedge action can be made when they are brought into contact with each other. 10. The method of claim 9,
Wherein the guide protrusion is detachable from the guide groove when the guide protrusion is moved rearward in a state of being inserted into the guide groove,
And the release of the bag from the support member is prevented by the action of the rearward force of the urging force of the elastic ring. 10. The method of claim 9,
Wherein a spacer for limiting movement of the plurality of sheets in the inner radial direction is disposed inside the plurality of sheets before inserting the reinforcing bars,
And the spacer is moved toward the rear hole side according to insertion movement of the reinforcing bars. 12. The method of claim 11,
Wherein a sum of a length of the spacer and a distance between a front end of the base portion and a rear portion of the support member when the elastic member is uncompressed is shorter than a length of a rear hole of the base portion. The method according to claim 1,
And an attachment protrusion is formed on an outer periphery of the case to improve adhesion with concrete. The method according to claim 1,
And the base portion includes a base plate and a connecting portion protruding forward from the base plate and screwed into the inner circumference of the rear end of the case. As a reinforcing joint,
[14] The apparatus according to claim 14, wherein two reinforcing end gripping mechanisms are provided,
Wherein the two reinforcing end gripping mechanisms are symmetrically connected such that the base plates face each other. 16. The method of claim 15,
Wherein one of the two reinforcing end gripping mechanisms and the other one of the two reinforcing end gripping mechanisms are one integrated base plate. In the structure,
A reinforcing joint according to claim 15; And
And a plurality of reinforcing bars connected by the reinforcing bars.

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