JP5607976B2 - Connecting joint for rod-shaped members - Google Patents

Description

  The present invention relates to a connecting joint of rod-shaped members, and more specifically, rod-shaped members made of a round pipe material or a round bar material having a circular cross-sectional shape can be reliably coupled to each other via this coupling joint. It is related with the connection coupling | joint of the rod-shaped member which can perform the fixed fixation of the rod-shaped member connected by this.

Various types of connecting joints for rod-shaped members have been proposed.
First, when connecting a solid round bar made of a metal round bar (such as a deformed bar with a spiral groove on the outer surface, a round bar with a smooth outer surface) in the longitudinal direction, In general, the end faces of a solid round bar are butted together and the butted portions are welded and connected.
When connecting a round pipe material made of metal or synthetic resin (a pipe material having a spiral groove formed on the outer surface, a pipe material having an outer surface formed on a smooth surface, etc.), JP 2000-329276 A A joint as shown in Japanese Patent Application Laid-Open No. 2005-90553 (Patent Document 2) has been proposed.

  In the joints of Patent Documents 1 and 2, the mounting structure of the round pipe material and the joint body is complicated, and furthermore, after the round pipe material is fastened and fixed to the joint sleeve of the joint body with a nut, a pulling force is applied to the round pipe material. In this case, as the pulling force increases (in proportion to the pulling force), the round pipe material is tightened in the direction of the joint sleeve and becomes more difficult to come off, so-called gripping force is not applied. .

JP 2000-329276 A JP-A-2005-90553

  First, the welding work described above is performed at the site of connecting and assembling the rod-shaped members, but the work site generally has a poor scaffolding and surrounding environment, so it is safe and reliable. In order to carry out, there were many obstacles, and various equipment and machines required for welding work had to be carried to the work site.

Moreover, in the joints of Patent Documents 1 and 2, in order to butt and assemble the joint body and the round pipe material, accurate alignment work is required, and the connection work also requires skill.
In addition, after tightening and fixing the round pipe material to the joint sleeve with a nut, when a pulling force is applied to the round pipe material, a tightening force that makes it difficult for the round pipe material to come off the joint body, so-called gripping force, is applied. Since it was not a thing of a structure, the safety | security with respect to retaining of a round pipe material was inadequate, and there existed a problem of putting on reliability.

  The present invention eliminates all of the above-mentioned problems, and despite the simple structure, the coupling body and the rod-shaped member are securely coupled, and the rod-shaped member once coupled to the coupling body is pulled out. The present invention provides a connecting joint for rod-like members in which when the force is applied, a tightening force that prevents the rod-like member from coming off from the joint body, that is, a so-called gripping force, is applied.

In order to achieve the above object, the invention of claim 1 comprises a joint body to which a metal rod-like member is attached, a cylindrical sleeve socket, and a spiral retaining ring set between the rod-like member and the sleeve socket. The joint sleeve is formed on the connecting surface to which the rod-shaped member on the joint body is attached, the threaded portion is formed on the threaded joint surface of the joint sleeve and the sleeve socket, and the threaded portion is formed on the inner peripheral surface of the sleeve socket. In the coupling joint of the rod-shaped member formed with a tapered inner peripheral surface gradually reducing the diameter from the terminal end side of the formation position toward the other end opening position of the sleeve socket ,
The number of turns of the spiral retaining ring is 1.5-8,
A tapered outer peripheral surface is formed on the outer peripheral surface of the spiral retaining ring, and the tapered inner peripheral surface formed on the sleeve socket is aligned with the inclined direction. When the sleeve socket is tightened, all the outer peripheral surfaces of the spiral retaining ring are tapered to the sleeve socket. A rod-shaped member coupling joint configured to be in close contact with the inner peripheral surface, and at the same time, all the inner peripheral surfaces of the spiral retaining ring are in close contact with the outer peripheral surface of the rod-shaped member .

According to a second aspect of the present invention, there is provided a joint for connecting rod-like members according to the first aspect of the present invention, further comprising a spacer capable of regulating a distance between the spiral retaining ring and the joint sleeve .

The invention according to claim 3 is the connecting joint for rod-like members according to claim 1 or 2 , wherein the rod-like member is a round pipe material .

According to a fourth aspect of the present invention, there is provided the connecting joint for bar-shaped members according to claim 1 or 2 , wherein the bar-shaped member is a round bar.

According to a fifth aspect of the present invention, the rod-shaped member connection joint according to the first or second aspect is characterized in that the rod-shaped member is a deformed reinforcing bar in which a spiral groove is formed on the outer peripheral surface.

According to the connecting joint of the bar-shaped member of the invention according to claim 1, despite the simple configuration, the coupling body and the metal bar-shaped member are securely coupled, and once coupled to the coupling body When a pulling force is applied to the bar-shaped member, an effect of applying a so-called gripping force that makes it difficult for the bar-shaped member to be detached from the joint body is exhibited.
Furthermore, it is possible to reliably manage the state of the gripping force of the spiral retaining ring with respect to the rod-shaped member only by visually recognizing the appearance of the positional relationship between the joint sleeve and the sleeve socket.
In addition, since the fastening of the spiral retaining ring to the tapered outer peripheral surface by the tapered inner peripheral surface of the sleeve socket becomes more reliable and efficient, the effect that the gripping force becomes perfect is exhibited.

  According to the connecting joint of the bar-shaped member of the invention according to claim 2, it is possible to prevent the spiral retaining ring from moving more than necessary to the sleeve socket side due to the presence of the spacer, and as a result, the tightening operation of the sleeve socket can be efficiently performed. Demonstrate the effect of being able to.

  According to the connection joint of the rod-shaped member of the invention concerning Claims 3 thru | or 5, the effect that it can apply also to a metal round pipe material, a round bar material, and a deformed reinforcing bar is exhibited, respectively.

  Furthermore, according to the connection joint of the rod-shaped member of the invention according to claim 5, since the spiral groove is formed on the outer peripheral surface of the metal rod-shaped member, the installation of the spiral retaining ring is facilitated. Is effective, and the gripping force to the rod-like member is improved.

It is a disassembled perspective view of the coupling joint which concerns on this invention. It is a partial cross section front view of the state which connected the rod-shaped member of the one side to the joint main part of the previous figure. It is a partial cross section front view of the state which connected the rod-shaped member of both sides to the joint main part of the previous figure. It is a disassembled perspective view of the connection coupling based on another Example. It is a partial cross section front view of the state which connected the rod-shaped member of both sides to the joint main part of the previous figure. It is a vertical end view of the spiral retaining ring according to another embodiment. It is a vertical end view of the spiral retaining ring according to still another embodiment.

  Hereinafter, embodiments of the coupling joint according to the present invention will be described with reference to the drawings. However, the present invention is not limited to these embodiments.

  The coupling joint shown in FIGS. 1 to 3 is an embodiment in which a round pipe member 4a is used as a metal rod-like member 4, and FIGS. 4 to 5 are round rod members 4b or deformed reinforcing bars as the rod-like member 4. An embodiment using 4c is shown, and FIGS. 6 and 7 show an embodiment in which the shape of the spiral retaining ring 3 is changed.

  The coupling joint according to the present invention includes a joint body 1, a cylindrical sleeve socket 2, and a spiral retaining ring 3 set between the rod-like member 4 and the sleeve socket 2.

Joint sleeves 5 and 5 are usually formed in a linear direction on the connecting surface to which the rod-like member 4 on the joint body 1 is attached. However, the joint sleeves 5 and 5 are not necessarily arranged in a linear direction. This is also possible, and should be freely selected depending on the conditions of the rod-like member 4 to be connected. Further, by using a plurality of joint bodies 1, a plurality of rod-like members 4 can be continuously repeated to form a long connection form.

The joint sleeves 5, 5 are joined by screwing the sleeve sockets 2, 2. Generally, a male thread portion 6 is formed on the outer peripheral surface of the joint sleeve 5, The female screw portion 7 is formed on the peripheral surface, and the male screw portion 6 and the female screw portion 7 are screwed together to attach the joint sleeve 5 and the sleeve socket 2. The formation positions of the male screw portion 6 and the female screw portion 7 can be freely exchanged for design reasons.

Before the coupling sleeve 5 and the sleeve socket 2 are screwed together, the spiral retaining ring 3 is positioned so as to be slightly wound around the outer peripheral surface of the rod-shaped member 4, and the rod-shaped member 4 and the spiral retaining ring 3 are placed. The sleeve socket 2 is screwed and joined to the joint sleeve 5 in the wrapped state. The spiral retaining ring 3 is formed of a resin material or a metal material, and is wound around the metal rod-shaped member 4 in a spiral shape, usually about 1.5 to 8 turns, but the number of turns is particularly limited. However, the gripping force by the sleeve socket 2 is improved as the number of turns increases.

  Since the spiral retaining ring 3 has the above-described configuration, the degree of freedom of expansion and contraction in the spiral direction is allowed in the stage before being attached to the rod-like member 4. When the spiral groove 11 is formed on the outer peripheral surface of the rod-shaped member 4, the rod-shaped member 4 can be attached to the rod-shaped member 4 along the spiral groove 11. It will be wrapped around. Before the outer peripheral surface of the spiral retaining ring 3 is tightened with the inner peripheral surface of the sleeve socket 2, the spiral retaining ring 3 is in a state where no pressure is applied to the outer peripheral surface of the rod-shaped member 4.

When the sleeve socket 2 is screwed into the joint sleeve 5 after completing such a preparation state, the tapered inner peripheral surface 8 of the sleeve socket 2 is wound around the outer peripheral surface of the rod-shaped member 4. The outer circumferential surface of the retaining ring 3 is pressed in a direction to be gradually tightened, and the pressed spiral retaining ring 3 changes its state (changes the tightening state) so as to be in close contact with the outer circumferential surface of the rod-shaped member 4, and finally Since the pressing force received from the inner peripheral surface of the sleeve socket 2 is transmitted to the outer peripheral surface of the rod-shaped member 4 through the spiral retaining ring 3, the rod-shaped member 4 is attached in close contact with the joint sleeve 5 (joint body 1). Thus, the connection between the two is ensured. In this state, the rod-shaped member 4 does not come out of the joint sleeve 5 (joint body 1).

Here, the screwed state of the sleeve socket 2 and the joint sleeve 5 can be easily confirmed by visually observing the external appearance of the positional relationship between them (the external appearance of the screwed state of both screwed portions). Therefore, at the construction site, it is possible to easily manage whether the safety level of the connection status between the two is perfect or incomplete.

Next, when a pulling force is applied to the rod-shaped member 4 that has been connected to the joint sleeve 5 (joint body 1) for some reason, the rod-shaped member 4 moves away from the joint sleeve 5 (joint body 1). Will be pulled in the direction.
That is, when the rod-like member 4 is pulled away from the joint sleeve 5 (joint body 1), the spiral retaining ring 3 that is in close contact with the rod-like member 4 is also pulled in the same direction. Is fixed to the joint sleeve 5 by screwing of the male screw portion 6 and the female screw portion 7, so that its position is not changed.

For this reason, the taper inner peripheral surface 8 of the sleeve socket 2 and the taper outer peripheral surface 9 of the spiral retaining ring 3 have a relationship that the tightening force increases in proportion to the magnitude of the tensile force as the pulling force increases. Therefore, the rod-like member 4 is prevented from being pulled out. In the present invention, since the taper inner peripheral surface 8 is formed on the sleeve socket 2, the taper outer peripheral surface 9 is not formed on the outer peripheral surface of the spiral retaining ring 3, but a parallel outer peripheral surface is used. Although the above effect is achieved, it is preferable to form the tapered outer peripheral surface 9 on the outer peripheral surface of the spiral retaining ring 3 in order to further ensure the effect.

In the present invention, a cylindrical spacer 10 can be provided, and by adjusting the spacer 10 with an appropriate dimensional width, it is possible to adjust the interval between the spiral retaining ring 3 and the end face of the sleeve socket 2, By the adjustment, the effect of the taper inner peripheral surface 8 of the sleeve socket 2 can be efficiently exhibited, and the effect that the assembling and mounting work can be easily performed can be exhibited.

The metal rod-like member 4 in the present invention may be of any kind such as a round pipe member 4a, a round rod member 4b, or a deformed reinforcing bar 4c. There is no hindrance to the installation of 3 at all.

Further, when the spiral groove 11 is formed on the outer peripheral surface of the rod-like member 4, the spiral retaining ring 3 can be installed along the groove using the spiral groove 11, so that the assembling work is facilitated. Can demonstrate.

In the case where the outer surface of the rod-like member 4 is a smooth surface without forming the spiral groove 11, a material in which the biting teeth 13 are formed on the inner surface of the spiral retaining ring 3 as shown in FIG. 6 is used. It is preferable to do. As the biting teeth 13 bite into the outer peripheral surface of the rod-shaped member 4 when the spiral retaining ring 3 is tightened, the spiral retaining ring 3 and the rod-shaped member 4 do not slip and the usability is improved.

  Furthermore, the overall shape of the spiral retaining ring 3 has a spiral shape, but the material of the spiral retaining ring 3 may be a strip-like material finished in a spiral shape, or a round wire-like material may be finished in a spiral shape. It may be.

In particular, when used for deformed reinforcing bars, etc., round wire material is finished in a spiral shape (coil spring shape) as shown in FIG. 7, and the inner peripheral surface side is left in the form of round wire material. When the outer peripheral surface side is cut or polished from the state of the round line and the surface in contact with the inner peripheral surface of the sleeve socket 2 is finished to have a flat shape (see FIGS. 5 and 7), the spiral retaining ring 3 and Since the frictional resistance of the sleeve socket 2 is further increased, usability is improved. Reference numeral 14 denotes a center line.

  The coupling joint of the present invention can be easily disassembled by loosening the screwed state of the sleeve socket 2, so that when the rod-like member 4 connected to the coupling joint needs to be replaced, the replacement can be easily performed. There is a feature that can be done.

The connecting joint of the rod-shaped member according to the present invention can be used in the field of connection work for various fluid supply pipes, water supply / drainage pipes, air supply / exhaust pipes, power / communication cable protection pipes, and various reinforcing bars in the construction of buildings. It is.

DESCRIPTION OF SYMBOLS 1 Joint body 2 Sleeve socket 3 Spiral retaining ring 4 Bar-shaped member 4a Round pipe member 4b Round rod member 4c Deformed bar 5 Joint sleeve 6 Male thread part 7 Female thread part 8 Tapered inner peripheral surface 9 of sleeve socket Taper outer periphery of spiral retaining ring Surface 10 Spacer 11 Spiral groove 12 on outer peripheral surface of rod-shaped member 12 Wrench portion 13 of sleeve socket Biting tooth 14 of spiral retaining ring Center line

Claims (5)

It consists of a joint body to which a metal rod-like member is attached, a cylindrical sleeve socket, and a spiral retaining ring set between the rod-like member and the sleeve socket, and a joint sleeve on a connecting surface to which the rod-like member on the joint body is attached A threaded portion is formed on each joint surface of the joint sleeve and the sleeve socket, and the inner peripheral surface of the sleeve socket is positioned at the other end opening portion of the sleeve socket from the terminal side of the threaded portion forming position. In the connecting joint of the rod-shaped member that formed the tapered inner peripheral surface gradually reducing the diameter toward the
The number of turns of the spiral retaining ring is 1.5-8,
A tapered outer peripheral surface is formed on the outer peripheral surface of the spiral retaining ring, and the tapered inner peripheral surface formed on the sleeve socket is aligned with the inclined direction. When the sleeve socket is tightened, all the outer peripheral surfaces of the spiral retaining ring are tapered to the sleeve socket. A connecting joint for rod-shaped members, characterized in that it is in close contact with the inner peripheral surface, and at the same time, all the inner peripheral surfaces of the spiral retaining ring are in close contact with the outer peripheral surface of the rod-shaped member. The connecting joint for rod-shaped members according to claim 1, further comprising a spacer capable of regulating a distance between the spiral retaining ring and the joint sleeve. The rod-shaped member coupling joint according to claim 1 or 2, wherein the rod-shaped member is a round pipe material. The bar-shaped member coupling joint according to claim 1 or 2, wherein the bar-shaped member is a round bar. The rod-shaped member coupling joint according to claim 1 or 2, wherein the rod-shaped member is a deformed reinforcing bar in which a spiral groove is formed on an outer peripheral surface.

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