JP5829984B2 - coupler - Google Patents

Description

  The present invention relates to a coupler.

  As a technique for preventing the bearing wall from being lifted in a wooden building, a method is generally used in which a hole-down hardware is installed on the bearing wall leg and the bearing wall head, and the base and the column, and the beam and the column are tightly coupled.

  However, in recent years, with the strengthening of the bearing walls and the middle layer of wooden buildings, the pulling force that acts on the ends of the bearing walls during typhoons and earthquakes has increased. May not be able to prevent the lift.

  As a method of dealing with such a problem, a method of installing a tie rod so as to penetrate through multiple levels from the lowest floor can be considered. In this method, tie rods are inserted into through-holes drilled in the upper and lower frames and beams of each layer, and the tie rods are fastened and fixed to the beams of each layer by nuts, thereby supporting the drawing force in a distributed manner. .

  By the way, in wooden buildings, it is known that wood such as pillars and beams shrinks over time due to drying, or the gap between members shrinks due to vertical load, so that the entire building sinks, In addition, it has been found that the amount of subsidence is greater for mid-rise buildings than for low-rise buildings. For this reason, when tie rods are used in mid-rise buildings, a large gap is created between the beam and the nut due to shrinkage of the wood, etc. There is a possibility that the lifting cannot be prevented.

  In view of this, conventionally, many techniques have been developed and put into practical use for exhibiting the function of preventing the tie rod from lifting even when contraction or the like of wood occurs.

  For example, in Patent Document 1, in a coupler that connects ends of tie rods divided into upper and lower parts, a cylindrical sleeve, a cylindrical connecting member inserted into the sleeve, and a rotation within the sleeve A cylindrical rotation member that can be inserted and moves along the axial direction of the sleeve, and a torsion spring that urges the rotation member in the insertion direction with respect to the sleeve are disclosed.

  In the coupler described in Patent Document 1, thread portions are formed on the inner peripheral surface of the lower portion of the sleeve, the inner peripheral surface of the connecting member, and the inner and outer peripheral surfaces of the rotating member, and the thread portion of the tie rod disposed on the upper side. Are screwed into the threaded portion of the connecting member, and the threaded portion of the tie rod disposed on the lower side is threadedly engaged with the threaded portion on the inner peripheral side of the rotating member, while the threaded portion on the outer peripheral side of the rotating member is threaded to the screw of the sleeve Screwed into the part.

  When the contraction of the wood occurs, the rotating member enters the sleeve while being rotated by the urging force of the torsion spring, and the tie rod disposed on the lower side enters the sleeve as the rotating member enters. The nut screwed to the tie rod can be moved in accordance with the shrinkage of the wood. As a result, it is possible to prevent the tie rod from being lifted by suppressing the formation of a gap between the beam or the like and the nut, thereby preventing the bearing wall from being lifted by an earthquake or the like.

Special table 2010-523917 gazette

  However, in the rotating member described in Patent Document 1, the twist direction of the screw portion on the inner and outer peripheral surfaces is the same, so that the tie rod can enter the sleeve only by the amount of movement of the rotating member relative to the sleeve. In order to ensure a sufficient amount of tie rod entry (movement amount), it is necessary to increase the lengths of the screw portions of the rotating member and the sleeve. As a result, the axial lengths of the rotating member and the sleeve are increased, leading to an increase in the size of the coupler, which makes it difficult to secure the construction space, and the workability and transportability of the coupler are poor.

  The present invention has been developed from such a viewpoint, and an object of the present invention is to provide a coupler that can be miniaturized.

In order to solve the above-mentioned problems, the present invention provides a coupler for connecting ends of a pair of tie rods, wherein an outer cylinder member to which the one tie rod is connected and the other tie rod are connected to each other, and An inner cylindrical member that is rotatably inserted into the cylindrical member and moves along the axial direction of the outer cylindrical member; and an elastic member that urges the inner cylindrical member to rotate in the insertion direction relative to the outer cylindrical member. The outer cylinder member includes a first female screw portion formed on the other side of the inner peripheral surface and a third male screw portion formed on the outer peripheral surface of the one tie rod formed on one side of the inner peripheral surface. A first male threaded portion that is formed on an outer peripheral surface and is threadedly engaged with the first female threaded portion of the outer tubular member, and an inner threaded member. A second male thread portion formed on the peripheral surface and formed on the outer peripheral surface of the other tie rod is screwed together. And a second female screw part, wherein the first female screw portion and the first male threaded portion, the second direction twisted relative to the female threaded portion is formed on opposite, the third female threaded portion Is characterized in that the twisting direction is opposite to the first female threaded portion .

  According to the present invention, the first male screw portion of the inner cylindrical member and the first female screw portion of the outer cylindrical member are screwed together, and the second female screw portion of the inner cylindrical member and the second male screw of the other tie rod When the contraction of the wood or the like occurs due to the threaded engagement with the portion, the inner cylinder member relatively moves toward the outer cylinder member while being rotated by the biasing force of the elastic member, and is drawn into the outer cylinder member. It will be. Further, with the relative movement of the inner cylinder member, the other tie rod moves relative to the outer cylinder member and is drawn into the outer cylinder member. Furthermore, since the first female screw portion and the first male screw portion are formed with the twist direction opposite to the second female screw portion, when the inner cylinder member moves while rotating, the other tie rod is The inner cylinder member moves relative to the inner cylinder member and is drawn into the inner cylinder member.

  That is, according to the present invention, the other tie rod is moved to the outer cylinder by the amount of movement of the inner cylinder member relative to the outer cylinder member and the amount of movement of the other tie rod relative to the inner cylinder member. Since it can be pulled into the member, the lengths of the first female screw part and the first male screw part can be made shorter than in the prior art, and the axial lengths of the outer cylinder member and the inner cylinder member can be suppressed. . As a result, the coupler can be reduced in size, so that it is easy to secure a construction space and the workability and transportability of the coupler can be improved.

  Further, according to the present invention, the outer cylinder member further includes a through hole penetrating along a direction intersecting the axial direction, is configured to be insertable into and removable from the through hole, and protrudes into the outer cylinder member. Preferably, a locking member is further provided, and the locking member abuts on one axial end of the inner cylinder member and the other tie rod to restrict relative movement with respect to the outer cylinder member.

  According to such a configuration, the locking member restricts the relative movement of the other tie rod when the other tie rod is attached to the coupler, and the function of restricting the relative movement (operation of the coupler) of the inner cylinder member with respect to the outer cylinder member. Can serve both functions. In particular, when the other tie rod is inserted into the inner cylinder member, even if the tip position (one axial end) of the other tie rod is not visible from the outside, the other tie rod contacts the locking member and relative movement is restricted. Therefore, positioning of the other tie rod can be performed easily and accurately, and workability can be improved.

  Moreover, it is preferable that this invention is comprised so that the coating | coated member which covers the said locking member from the outer side may be provided in the outer peripheral surface of the said outer cylinder member.

  Since the coupler according to the present invention has a structure that is activated when the operator removes the locking member from the through hole, there is a possibility that the locking member may be forgotten to be pulled out during construction. Therefore, since the covering member that covers the locking member from the outside is provided on the outer peripheral surface of the outer cylinder member, the covering member serves as a mark for determining whether or not the locking member has been removed. Forgetting to remove the locking member can be suppressed.

  In the present invention, it is preferable that the first male screw portion and the second female screw portion of the inner cylinder member are formed at the same pitch.

  According to this configuration, the first male screw portion and the second female screw portion of the inner cylinder member are formed at the same pitch, so that the amount of movement of the inner cylinder member relative to the outer cylinder member, Since the amount of movement of the other tie rod relative to the inner cylinder member can be made equal, the inner cylinder member can be smoothly rotated.

Further, in the present invention, the second female screw portion is formed over the entire inner peripheral surface of the inner cylinder member, and the first female screw portion and the first inner thread of the inner peripheral surface of the outer cylinder member. It is preferable that a non-threaded part not formed with a thread is provided between the three female threaded parts .

  According to the present invention, a coupler that can be miniaturized can be provided.

(A) is a schematic perspective view which shows the building provided with the coupler which concerns on embodiment of this invention, (b) is the A section enlarged view of (a). It is a side view which shows the coupler which concerns on embodiment of this invention. It is sectional drawing which shows the coupler which concerns on embodiment of this invention. It is the B section enlarged view of FIG. It is sectional drawing for demonstrating operation | movement of the coupler which concerns on embodiment of this invention, (a) is sectional drawing which shows a non-operation state, (b) is sectional drawing which shows an operation state. (A) is a side view which shows the coupler which concerns on a modification, (b) is sectional drawing which shows the coupler which concerns on a modification.

  A coupler according to an embodiment of the present invention will be described in detail with reference to the drawings. In the description, the same elements are denoted by the same reference numerals, and redundant description is omitted.

Fig.1 (a) is a schematic perspective view which shows the building provided with the coupler based on embodiment of this invention, FIG.1 (b) is the A section enlarged view of (a).
As shown in FIG. 1 (a), the building 100 includes an inverted T-shaped foundation 70 in a cross-sectional view, a foundation 72 installed on the foundation 70, a structural wall 74 installed on the foundation 72, Is provided. In the present embodiment, the building 100 is a wooden three-story house, but the present invention may be applied to, for example, a wooden two-story house or a wooden four-story house. Moreover, although the foundation 70 is comprised with the cloth foundation, you may be comprised with a solid foundation.

  The structural wall 74 is mainly composed of a lower frame 76, a pillar 78 erected on the lower frame 76, an upper frame 80 that connects the column heads of the pillar 78, and a head joint 82 that is installed on the upper frame 80. A plurality (three) are provided along the vertical direction. Beams 84 are installed between the structural walls 74, respectively. The lower frame 76, the upper frame 80, the head joint 82, and the beam 84 are each provided with a through hole (not shown), and a tie rod T is inserted into the through hole.

  The tie rod T is a member made of, for example, a PC steel rod (SBPR) or the like, and is divided into a plurality (four pieces) in the vertical direction. The lowermost tie rod T is connected to an anchor bolt 86 via a coupler C. The lower end side of the anchor bolt 86 is embedded in the foundation 70, while the upper end side penetrates the base 72 and the lower frame 76 and protrudes upward from the lower frame 76.

  The tie rod T arranged on the uppermost side is fixed to the pillar 78 on the uppermost floor via a hole-down hardware 88. Further, as shown in FIG. 1B, a washer 90 and a nut 92 are inserted into the tie rod T, and the washer 90 abuts against the lower frame 76 by tightening the nut 92. With such a structure, the tie rod T can prevent the column 78 and the beam 84 from being lifted.

  The tie rods T and T are connected to each other through a coupler C. In the present embodiment, the second coupler C from the bottom is composed of a coupler provided with the torsion spring 3 (see FIG. 2) of the present invention, and the other couplers C are conventionally known couplers not provided with the torsion spring 3. It consists of

  Next, the coupler C including the torsion spring 3 which is a characteristic part of the present invention will be described in detail with reference to FIGS. FIG. 2 is a side view showing the coupler according to the embodiment of the present invention. FIG. 3 is a cross-sectional view illustrating a coupler according to an embodiment of the present invention. FIG. 4 is an enlarged view of a portion B in FIG. In FIG. 3, the adhesive tape 5 is omitted for convenience of explanation.

  In the following description, the tie rod T disposed on the lower side with the coupler C interposed therebetween is referred to as “tie rod T1”, and the tie rod T disposed on the upper side with the coupler C interposed therebetween is referred to as “tie rod T2”. A male threaded portion Ta is threaded on the outer peripheral surface of the tie rod T1, and a male threaded portion Tb is threaded on the outer peripheral surface of the tie rod T2. The male screw portion Tb constitutes a “second male screw portion” referred to in the claims.

  2 and 3, the coupler C is a member that connects the ends of the pair of tie rods T1 and T2, and includes a sleeve 1, an insert 2, a torsion spring 3, a locking screw 4, and the like. And an adhesive tape 5.

<Sleeve>
As shown in FIG. 3, the sleeve 1 that is an outer cylinder member is a substantially cylindrical metal member having upper and lower ends opened. The sleeve 1 includes a first insertion hole 11 formed so as to penetrate along the axial direction (vertical direction), a second insertion hole 12 provided on the upper end side and formed so as to penetrate along the direction orthogonal to the axial direction, The mounting hole 13 provided on the lower end side and recessed along the direction orthogonal to the axial direction, and provided on the outer peripheral surface of the lower end side, formed with a reduced diameter by a predetermined length compared to other parts. Engaging portion 14.

  The first insertion hole 11 has a large-diameter portion 11a having a constant inner diameter along the axial direction from the upper end to the lower end of the sleeve 1, and an inner diameter smaller than the large-diameter portion 11a. A small-diameter portion 11b formed with a constant inner diameter along the axial direction from the upper end to the upper end, a step portion 11c extending in a direction orthogonal to the axial direction and connecting the large-diameter portion 11a and the small-diameter portion 11b, It is composed of

  The large diameter portion 11a is a portion where the insert 2 is inserted and screwed. A female screw portion 11d is screwed into the large diameter portion 11a from the upper end to the vicinity of the lower edge of the second insertion hole 12. The female screw portion 11d constitutes a “first female screw portion” in the claims.

  The small diameter portion 11b is a portion where the upper end side of the tie rod T1 disposed on the lower side is inserted and screwed. A female screw portion 11e is screwed into the small diameter portion 11b from the lower end to the vicinity of the upper end. In this case, the tie rod T1 is coupled to the sleeve 1 by screwing the male screw portion Ta with the female screw portion 11e of the small diameter portion 11b. Further, the small diameter portion 11b is provided with a non-threaded portion 11f in which no thread is formed, continuously from the upper end of the female threaded portion 11e. By providing the non-threaded portion 11f, the tie rod T1 can be prevented from entering (protruding) into the large diameter portion 11a to prevent contact with the tie rod T2, so that the downward movement of the tie rod T2 is not hindered. Further, the rotation prevention of the sleeve 1 and the positioning of the tie rod T1 can be performed.

  The second insertion hole 12 that is a through hole is a part into which the locking screw 4 is inserted. The 2nd insertion hole 12 is provided so that the inside (large diameter part 11a) and the exterior of the sleeve 1 may be penetrated.

  The attachment hole 13 is a part where the lower end side of the torsion spring 3 is inserted and held. The mounting hole 13 is provided on the outer peripheral surface of the sleeve 1 corresponding to the small diameter portion 11b.

  The engaged portion 14 is a part that is gripped by a spanner (not shown) when applying a biasing force (tension) to the torsion spring 3 or moving the insert 2 upward as will be described later.

<Insert>
As shown in FIG. 3, the insert 2 that is an inner cylinder member is a substantially cylindrical metal member having upper and lower ends opened. The insert 2 is rotatably inserted into the sleeve 1 and is configured to move along the axial direction. The insert 2 is provided on the upper end side, the insertion portion 21, the flange portion 22 formed to project radially outward from the outer peripheral surface of the upper end of the insertion portion 21, the third insertion hole 23 formed so as to penetrate along the axial direction. And a mounting hole 24 formed along a direction orthogonal to the axial direction.

  The insertion portion 21 is a portion that is inserted into the large diameter portion 11a of the sleeve 1 and screwed. On the outer peripheral surface of the insertion portion 21, a male screw portion 21 a is threaded from the lower end to the vicinity of the flange portion 22. The insert 2 is connected to the sleeve 1 by screwing the male screw portion 21 a with the female screw portion 11 d of the sleeve 1. The male screw portion 21a constitutes a “first male screw portion” in the claims.

  The flange portion 22 is formed larger than the inner diameter of the large-diameter portion 11 a of the sleeve 1, and functions as a stopper portion that prevents the entire insert 2 from entering the sleeve 1. As will be described later, the flange portion 22 has an engaged portion that is sandwiched and gripped by a spanner (not shown) when an urging force (tension) is applied to the torsion spring 3 or when the insert 2 is moved upward. Provided. The engaged portion is composed of a pair of planar portions formed so as to face the outer peripheral surface of the flange portion 22.

  The third insertion hole 23 is a portion that is formed over the entire length of the insert 2 and is inserted and screwed into the lower end side of the tie rod T2 disposed on the upper side. In the third insertion hole 23, a female screw portion 23a is threaded from the upper end to the lower end. In this case, the tie rod T <b> 2 is coupled to the insert 2 by screwing the male screw portion Tb with the female screw portion 23 a of the third insertion hole 23. The female screw portion 23a constitutes a “second female screw portion” in the claims.

  The attachment hole 24 is a part where the upper end side of the torsion spring 3 is inserted and held. The attachment hole 24 is provided on the outer peripheral surface of the flange portion 22.

  In the present embodiment, the female screw portion 11d of the sleeve 1 and the male screw portion 21a of the insert 2 are formed with a left screw, while the female screw portion 23a of the insert 2 is formed with a right screw. In other words, the female screw portion 11 d of the sleeve 1 and the male screw portion 21 a of the insert 2 are formed with the twist direction opposite to the female screw portion 23 a of the insert 2. The male threaded portion Ta of the tie rod T1, the male threaded portion Tb of the tie rod T2, and the female threaded portion 11e of the sleeve 1 are formed with a right-hand thread.

  Further, as shown in FIG. 4, the pitch L1 of the male screw portion 21a, the pitch L2 of the female screw portion 23a, the pitch L3 of the female screw portion 11d, and the pitch L4 of the male screw portion Tb are formed at the same pitch. Yes. Thereby, when the coupler C is operated, the amount of movement of the insert 2 relative to the sleeve 1 and the amount of movement of the tie rod T2 relative to the insert 2 can be made equal. It can be rotated smoothly.

  Incidentally, in the present embodiment, the sleeve 1 and the insert 2 are made of, for example, carbon steel such as S45C that has been quenched. Thereby, since the strength of the sleeve 1 and the insert 2 is increased, the outer diameters of the sleeve 1 and the insert 2 can be reduced, and the sleeve 1 and the insert 2 can be reduced in the radial direction.

<Torsion spring>
As shown in FIGS. 2 and 3, the torsion spring 3, which is an elastic member, is mounted on the outer peripheral surface of the sleeve 1 and urges the insert 2 to rotate in the insertion direction (counterclockwise, counterclockwise) with respect to the sleeve 1. It is a member. The upper end side of the torsion spring 3 is inserted and held in the mounting hole 24 of the insert 2, and the lower end side is inserted and held in the mounting hole 13 of the sleeve 1.

<Locking screw>
As shown in FIG. 3, the locking screw 4 that is a locking member is detachably provided in the second insertion hole 12 of the sleeve 1, and has a function of restricting downward movement of the insert 2 (operation of the coupler C); It also has the function of regulating the downward movement of the tie rod T2. The locking screw 4 protrudes into the large diameter portion 11a while being inserted into the second insertion hole 12. As a result, the locking screw 4 comes into contact with the lower ends of the insert 2 and the tie rod T2, and the rotation of the insert 2 and the positioning of the tie rod T2 can be performed.

  In particular, by inserting the locking screw 4 into the second insertion hole 12, even when the tie rod T2 is inserted into the insert 2 and the lower position of the tie rod T2 is not visible from the outside, the tie rod T2 is connected to the locking screw 4. Since the downward movement is restricted by contact, the tie rod T2 can be positioned easily and accurately, and the workability can be improved. When the locking screw 4 is pulled out from the second insertion hole 12, the urging force of the torsion spring 3 is released, and the downward movement of the insert 2 is allowed.

<Adhesive tape>
As shown in FIG. 2, the adhesive tape 5 as a covering member is a member that is wound around the outer peripheral surface of the sleeve 1 and covers the head of the locking screw 4 from the outside. Thereby, since the adhesive tape 5 serves as a mark for determining whether or not the locking screw 4 is removed, it is possible to suppress forgetting to remove the locking screw 4.

  The coupler C according to the embodiment of the present invention is basically configured as described above. Next, referring to FIG. 3, the process of assembling the coupler C according to the embodiment of the present invention is described. An example will be described.

  First, the lower end side of the torsion spring 3 is inserted into the mounting hole 13 of the sleeve 1. Subsequently, the male threaded portion 21a of the insert 2 is screwed into the female threaded portion 11d of the sleeve 1 to couple them together. Then, the upper end side of the torsion spring 3 is inserted into the mounting hole 24 of the insert 2. Note that the torsion spring 3 may be attached after the sleeve 1 and the insert 2 are connected.

  Subsequently, the spanner is used to grip the flange portion 22 of the insert 2 and another spanner is used to grip the engaged portion 14 of the sleeve 1 to rotate the insert 2 clockwise (clockwise). As a result, the insert 2 moves upward with respect to the sleeve 1, and the torsion spring 3 is twisted to apply a counterclockwise biasing force to the torsion spring 3.

  Subsequently, when the insert 2 moves above the second insertion hole 12, the locking screw 4 is inserted into the second insertion hole 12 of the sleeve 1.

  When the spanner is released, the insert 2 moves downward by the urging force of the torsion spring 3, and then comes into contact with the locking screw 4 and is stopped.

  Finally, the adhesive tape 5 is wound around the outer peripheral surface of the sleeve 1 so as to cover the head of the locking screw 4 from the outside.

  Next, the process of connecting the tie rods T1, T2 to the coupler C assembled in this way will be described.

  First, the male threaded portion Ta of the tie rod T1 disposed on the lower side is screwed into the female threaded portion 11e of the sleeve 1, thereby connecting the two.

  Subsequently, the male threaded portion Tb of the tie rod T2 disposed on the upper side is screwed into the female threaded portion 23a of the insert 2, thereby connecting the two. At this time, the tie rod T2 is screwed in until the lower end of the tie rod T2 contacts the locking screw 4.

  Finally, the adhesive tape 5 is removed, and the locking screw 4 is removed from the second insertion hole 12 of the sleeve 1 using a screwdriver. The extraction operation of the locking screw 4 is preferably performed after the installation of the structural wall 74, the roof (not shown), etc., and immediately before the interior operation.

  Incidentally, if the locking screw 4 is accidentally pulled out before the tie rods T1 and T2 are connected, the hook 22 of the insert 2 is gripped with a spanner and the sleeve 1 is engaged with another spanner. The insert 14 is rotated clockwise by grasping the joint portion 14, and the insert 2 is moved upward with respect to the sleeve 1. Subsequently, when the insert 2 moves above the second insertion hole 12, the locking screw 4 is inserted into the second insertion hole 12 of the sleeve 1.

  When the spanner is released, the insert 2 moves downward by the urging force of the torsion spring 3, and then comes into contact with the locking screw 4 and is stopped. Thereby, the coupler C can be returned to the original state (non-operational state) at the construction site. Further, since the coupler C can be easily returned from the operating state to the non-operating state, the reuse of the coupler C can also be realized.

  Next, the operation of the coupler C according to the embodiment of the present invention will be described with reference to FIG. 5A and 5B are cross-sectional views for explaining the operation of the coupler according to the embodiment of the present invention, wherein FIG. 5A is a cross-sectional view showing a non-operating state, and FIG. 5B is a cross-sectional view showing an operating state. It is.

  When contraction or the like of wood (see FIG. 1) such as the pillar 78 and the beam 84 is not generated, the tie rod T2 cannot be moved downward because it is locked to the lower frame 76, the beam 84, or the like. Therefore, as shown in FIG. 5A, the insert 2 cannot move downward, and the insert 2 does not rotate.

  On the other hand, when contraction of wood such as the pillar 78 and the beam 84 occurs, the locking (nut 92) to the lower frame 76, the beam 84, etc. of the tie rod T2 is loosened, so that the tie rod T2 can move downward. Therefore, as shown in FIG. 5B, the insert 2 can also move downward, and the insert 2 is rotated by the urging force of the torsion spring 3.

  At this time, in this embodiment, since the female threaded portion 11d of the sleeve 1 and the male threaded portion 21a of the insert 2 are formed by left-handed screws, the insert 2 is rotated relative to the sleeve 1 while rotating counterclockwise. Accordingly, it moves downward and is drawn into the sleeve 1. Further, as the insert 2 moves downward, the tie rod T2 moves downward relative to the sleeve 1 and is drawn into the sleeve 1.

  Furthermore, in this embodiment, since the female thread part 23a of the insert 2 and the male thread part Tb of the tie rod T2 are formed by right-hand threads, when the insert 2 rotates counterclockwise, the tie rod T2 Will be the same as rotating clockwise. As a result, the tie rod T <b> 2 moves downward relative to the insert 2 and is drawn into the insert 2.

  That is, the tie rod T2 can be drawn into the sleeve 1 by the amount of movement of the insert 2 relative to the sleeve 1 and the amount of movement of the tie rod T2 relative to the insert 2.

  When the tie rod T2 is drawn into the sleeve 1, the nut 92 (see FIG. 1) screwed to the tie rod T2 moves downward. That is, since the nut 92 moves in accordance with the shrinkage of the wood or the like, it is possible to suppress the occurrence of a gap between the lower frame 76 and the nut 92 and to exhibit the function of preventing the tie rod T2 from rising.

  According to this embodiment described above, as shown in FIGS. 5A and 5B, the amount of movement of the insert 2 relative to the sleeve 1 and the amount of tie rod T2 moved relative to the insert 2. Since the tie rod T2 can be pulled into the sleeve 1 by the amount of movement, the length of the sleeve 1 and the insert 2 in the axial direction can be reduced by shortening the length of the female screw portion 11d and the male screw portion 21a. It becomes possible to suppress. Thereby, since the coupler C can be reduced in size, it is easy to secure a construction space, and the workability and transportability of the coupler C can be improved.

According to the present embodiment, as shown in FIG. 3, the locking screw 4 serves both as a function for regulating the downward movement of the insert 2 (operation of the coupler C) and a function for regulating the downward movement of the tie rod T2. be able to.
In particular, when the tie rod T2 is inserted into the insert 2, even if the lower position of the tie rod T2 is not visible from the outside, the tie rod T2 abuts against the locking screw 4 and the downward movement is restricted. It can be carried out easily and accurately, and the workability can be improved.

  According to the present embodiment, as shown in FIG. 2, the adhesive tape 5 is wound around the outer peripheral surface of the sleeve 1 so as to cover the locking screw 4 from the outside. Since it becomes a mark for determining whether or not is removed, forgetting to remove the locking screw 4 can be suppressed.

  According to the present embodiment, as shown in FIG. 4, the pitch L1 of the male screw portion 21a, the pitch L2 of the female screw portion 23a, the pitch L3 of the female screw portion 11d, and the pitch L4 of the male screw portion Tb are the same. Since the amount of movement of the insert 2 relative to the sleeve 1 and the amount of movement of the tie rod T2 relative to the insert 2 can be made equal, the insert 2 can be made smoothly. Can be rotated.

  According to the present embodiment, by forming the female screw portion 23a of the insert 2 to which the male screw portion Tb of the tie rod T2 is screwed with the right screw, the tie rod can be used without changing the mode of the existing steel rod (bolt). Because it can be used, it is highly versatile.

  The preferred embodiment of the present invention has been described above with reference to the drawings. However, the present invention is not limited to this embodiment, and can be changed as appropriate without departing from the gist of the present invention.

  In this embodiment, the coupler C is installed so that the insert 2 is positioned on the upper side, and the tie rod T2 disposed on the upper side is screwed into the insert 2. However, the present invention is not limited to this, The coupler C may be installed so that 2 is positioned on the lower side, and the lower tie rod T1 may be screwed onto the insert 2.

  In this embodiment, the tie rod T1 and the sleeve 1 are connected by screwing the screw portions Ta and 11e to each other. However, the present invention is not limited to this, and for example, the screw portions Ta and 11e are omitted. The tie rod T1 and the sleeve 1 may be connected by fixing means such as welding.

  In the present embodiment, the female screw portion 11d of the sleeve 1 and the male screw portion 21a of the insert 2 are formed with a left-hand thread, while the female screw portion 23a of the insert 2 and the male screw portion Tb of the tie rod T2 are with a right-hand screw. Although formed, the present invention is not limited to this, and the female screw portion 11d of the sleeve 1 and the male screw portion 21a of the insert 2 are formed of a right-hand thread, while the female screw portion 23a of the insert 2 is formed. The male threaded portion Tb of the tie rod T2 may be formed with a left-hand thread.

  In the present embodiment, in the insert 2, the pitch L1 of the male screw portion 21a and the pitch L2 of the female screw portion 23a are formed the same, but the present invention is not limited to this, and the pitch of the male screw portion 21a is not limited to this. The pitch L1 and the pitch L2 of the female screw portion 23a may be formed differently. In this case, the pitch L3 of the female screw portion 11d and the pitch L4 of the male screw portion Tb are also changed as appropriate.

  In this embodiment, the downward movement of the insert 2 and the tie rod T2 is regulated by the locking screw 4. However, the present invention is not limited to this, for example, as shown in FIGS. 6 (a) and 6 (b). The locking pin 6 may restrict the downward movement of the insert 2 and the tie rod T2. The locking pin 6 is composed of a split pin. The locking pin 6 has a pin hole 61 at one end, and a ring-shaped member 62 is inserted into the pin hole 61. In this case, the adhesive tape 5 is wound around the outer peripheral surface of the sleeve 1 so as to pass the ring-shaped member 62.

  In the present embodiment, the adhesive tape 5 is used to determine whether or not the locking screw 4 has been removed. However, the present invention is not limited to this, and the locking screw 4 is removed. Any mark may be used as long as it serves as a mark for determining whether or not it has been removed. For example, you may make it cover the head of the locking screw 4 from the outside using a string-like member. Moreover, what is necessary is just to cover at least one part of the head of the locking screw 4 from the outside.

C Coupler 1 Sleeve (outer cylinder member)
11d Female thread (first female thread)
11e Female thread (third female thread)
12 Second insertion hole (through hole)
2 Insert (inner cylinder member)
21a Male thread (first male thread)
23a Female thread (second female thread)
3 Torsion spring (elastic member)
4 Locking screw (locking member)
5 Adhesive tape (coating material)
6 Locking pin (locking member)
L1, L2 Pitch T (T1, T2) Tie Rod Ta Male Thread (Third Male Thread)
Tb male thread (second male thread)

Claims (5)

A coupler for connecting the ends of a pair of tie rods,
An outer cylinder member to which the one tie rod is connected;
The other tie rod is connected, and is rotatably inserted into the outer cylinder member, and moves along the axial direction of the outer cylinder member; and
An elastic member that urges the inner cylinder member to rotate in the insertion direction with respect to the outer cylinder member,
The outer cylinder member includes a first female screw portion formed on the other side of the inner peripheral surface and a third male screw portion formed on one side of the inner peripheral surface and formed on the outer peripheral surface of the one tie rod. A third female screw portion to be joined ,
The inner cylinder member is formed on the outer peripheral surface, formed on the inner peripheral surface of the first male screw portion that is screwed into the first female screw portion of the outer cylinder member, and formed on the outer peripheral surface of the other tie rod. A second female screw portion with which the second male screw portion is screwed,
The first female screw part and the first male screw part are formed with a twist direction opposite to the second female screw part ,
The coupler characterized in that the third female screw portion is formed with a twist direction opposite to that of the first female screw portion . The outer cylinder member further has a through hole penetrating along a direction intersecting the axial direction,
It is configured to be insertable into and removable from the through hole, and further includes a locking member that protrudes into the outer cylinder member,
2. The coupler according to claim 1, wherein the locking member abuts against one end in the axial direction of the inner cylinder member and the other tie rod to restrict relative movement with respect to the outer cylinder member.   The coupler according to claim 2, wherein a covering member that covers the locking member from the outside is provided on an outer peripheral surface of the outer cylinder member.   The coupler according to any one of claims 1 to 3, wherein the first male screw portion and the second female screw portion of the inner cylinder member are formed at the same pitch. The second female thread portion is formed over the entire length of the inner peripheral surface of the inner cylinder member,
The non-screw part in which the screw thread is not formed is provided between the 1st female screw part and the 3rd female screw part among the inner skin of the outer cylinder member. The coupler as described in any one of Claims 1 thru | or 4.

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