JP4015459B2 - Threaded joints for building structural materials - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a screw-type connector for building structure materials, and more specifically, a columnar receiver embedded so as to cross in the vicinity of a joint of the building structure material, and a columnar receiver penetrating another building structure material. The present invention relates to a building structural material joining fixture capable of fastening a plurality of objects to be joined by means of a tension bar that is screw-fastened in a T-shape.
[0002]
[Prior art]
Tightening metal fittings that allow a wooden column and a beam to be fastened or fixed to a base by screwing a tension rod into the female cylindrical support in the center in the longitudinal direction are often used. Are known. For example, JP-A-9-60124 discloses an example thereof.
[0003]
More specifically, the cylindrical receiving member has a diameter of, for example, about 30 mm and a length of about 120 mm, and is embedded so as to cross the beam at a location separated by about 200 mm from the joint of the 120 mm square beam. A female screw having a diameter of about 10 mm provided so as to traverse at the center of the cylindrical holder has a screw hole engraved column receiving so that its axis is horizontal, that is, coincides with the axis of the beam. The embedding posture of the tool is adjusted.
[0004]
If the column is also 120 mm square, the tension rod 3 shown in the middle part of FIG. 17 having a male screw with a diameter of 10 mm at the tip is about 330 mm long, and is horizontal from the side of the column 16 toward the joint of the beam 51. If the head 3h is rotated with a spanner or a hexagon wrench after the head is inserted into the washer 3w, the beam 51 can be fixed to the column 16 by the cylindrical holder 17 and the washer 3w. it can.
[0005]
In such a fastener, the operation space 52 must be secured on the axially extending side of the tension bar in order to rotate the head of the tension bar. Therefore, the beam is arranged at the same height from the left and right with respect to the through column. When the structure shown in the upper part of FIG. 17 is used, it can no longer be used. In this case, as shown in the figure, the beams 13 and 36 are provided with recesses 53 and 54 that open upward, and the nut 55 is hung on the long tension rod 3A inserted from the column 16 toward the beam 13. Then, the tension rod 3A protruding to the right is passed through a horizontal hole provided in the beam 36, and a nut 56 is hung at the recess 54.
[0006]
Such a double pulling structure may be accompanied by a slight risk that the mounting structure becomes complicated, the assembling work becomes complicated, and in some cases, the pulling structure may be detached as compared with the single pulling structure described above. In addition, a large cross-sectional defect occurs in the recessed portion, and the strength and rigidity inherent in the beam cannot be fully exhibited. Of course, since the dent tends to be as shallow as possible, the tension bar tends to be shifted to the upper surface side (in the case of the figure) or the lower surface side of the beam, and it is difficult to achieve tight binding by the force evenly distributed in the joint.
[0007]
When the column 16 is attached to the base 15 as shown in the lower part of FIG. 17, it is fixed by an anchor 58 to the foundation and a screw rod 59 to the column by using an L-shaped bracket 57. . This is because there is no longer any room for fixing the tension bar to the cylindrical holder at this location, so that the fixing structure becomes complicated as shown in the figure and the number of parts used increases.
[0008]
[Problems to be solved by the invention]
By the way, so that the fixing operation of the tension bar can be performed anywhere, that is, the operation space for screwing the tension bar to the cylindrical support does not exist on the axial extension line side of the tension bar. However, Japanese Patent Application Laid-Open No. 2001-146792 proposes a structure that enables a tightening operation and that can realize a double pulling structure without a large cross-sectional defect.
[0009]
When a T-shaped fastening bracket is used, the above-described tension rod is composed of two members, a first member having a male screw at one end and a rotating head at the other end, and a female screw that can be screwed to the male screw. At the end, but is mostly solid and comprises a second member in which a wedge advancement / retraction groove is formed at a position where the cylindrical receiver is inserted. On the other hand, the cylindrical receiver has no internal thread in its center, and is a simple insertion hole. However, this cylindrical receiver is hollow, and is a wedge-displacement-type cylindrical receiver that includes a wedge body that is axially displaceable and a child screw that boosts the wedge body.
[0010]
(Please refer to Fig. 3 of Japanese Patent Laid-Open No. 2001-146792)
For example, a cylindrical holder is embedded in the beam, and the second member is inserted from the end of the beam. When the second member is pushed in until the wedge advance / retreat groove reaches the cylindrical holder, the wedge body is pushed to the extent that the wedge body is slightly crossed by the second member by the screw advance of the child screw in the cylindrical holder. The first member is inserted from the opposite side of the column, and the male screw coming out of the column is screwed to the female screw of the second member. Thereafter, if the wedge body is advanced by turning the internal screw in the cylindrical receiver, the second member moves slightly in the axial direction together with the first member, and the beam is strongly fixed to the column by this wedge action.
[0011]
(Please refer to Fig. 3 of Japanese Patent Laid-Open No. 2001-146792)
Tightening fittings attached to columns and beams will not be removed afterwards, but in the event that it becomes necessary, the cylindrical holder is pressed with a smaller diameter on the opposite side of the child screw with a wedge in between. A screw hole is provided. If the push screw is moved forward by retreating the slave screw and the wedge body is pushed back, a gap is generated between the second member and the wedge body, and the tight state can be released. In addition, if a hexagonal wrench is inserted from the axial direction of a wedge displacement type cylindrical holder and the child screw and the push screw are rotated, the displacement can be given arbitrarily.
[0012]
(Please refer to Fig. 9 of JP2001-146792)
If a single-pull structure is acceptable, it is as described above. However, if a double-pull structure is used, a sleeve body is used instead of the first member, and the female thread portion of the second member is changed to a male thread. That's fine. Then, a screw rod, which is a third member, is screwed onto the opposite side of the sleeve body, and the opposite end is screwed into the screw hole engraving type columnar receiver described in JP-A-9-60124. Just keep it. The final binding operation is such that the second member pulls the third member through the sleeve body by advancing the wedge body in the wedge advance / retreat groove of the second member as described above. This type of tight structure can be applied to any location shown in FIG.
[0013]
By the way, the tightening force is exerted through the taper surface by advancing the wedge body. Needless to say, a large friction acts on the taper surface, which is necessary for screwing the child screw. The rotational force becomes extremely large. In addition, the axial force to be applied to the first member or the like cannot be determined based on the torque exerted on the child screw, but the operation for defining the advancement amount of the wedge body so as to give the desired axial force. Is a difficult technique. Also, the processing accuracy of the wedge advance / retreat groove is required to be extremely high.
[0014]
In addition, since the symmetrically wedge advance / retreat groove is formed in the second member, a cross-sectional defect portion is formed in the second member itself, and a thick bar is required to exert a desired tightening force. However, there is also a problem that the size of the tight fittings is forced to increase. Of course, the advancement and retraction of the wedge body is limited to the generation of the fastening force based on the axial displacement of the tension bar, and it is impossible to rotate the tension bar by rotating the child screw. Therefore, all of the screwing operations must be completed before tightening, and there is a drawback that the application as a tightening bracket is narrowed.
[0015]
The present invention has been made in view of the above-described problems, and its object is to enable a tightening structure that can be applied without causing a large cross-sectional defect in a structural material not only in single pulling but also in double pulling. The simplification and operability of the product make it easy to exert stable movement and the desired size of binding force, and it is less likely to be constrained by the space for tightening operation, and there is no cross-sectional defect in the bracket itself. It is providing the screw type connector for building structural materials which implement | achieved.
[0016]
[Means for Solving the Problems]
According to the present invention, a receiving tool is embedded in the vicinity of a mouth of a building structural material, and a female screw portion that is threadedly engaged with a male screw portion at one end of a tension bar that extends through the other structural material is provided in the receiving device. The fitting is formed with a fitting hole into which the male threaded portion of the tension bar can be inserted, and the female threaded portion is provided so as to be freely rotatable in the receiving tool around the axis line that coincides with the axial center of the fitting hole. Formed at the center of the worm wheel, the outer periphery of the worm wheel is engaged with a worm that is rotated by a rotational force transmission rod inserted into the support, and the male screw part pre-engaged with the female screw part is rotated by the worm. A retaining portion that is formed at the other end of the tension bar and can exert a tightening force by generating a large joining force by being screwed more strongly or by applying a rotational force to the tension screw that is strongly screwed. Can be used to tie structural materials together It is applied to the building structure member joining fixture on. Refer to FIG. 1 for the features.
The receiver 2 has a columnar shape that is embedded in the vicinity of the joint and crosses the building structural material. The female screw portion 4f is disposed in the middle in the longitudinal direction of the receiver 2. The rotational force transmission rod 7 is the axis of the columnar receiver 2. It is inserted from the end face 2e of the receiving device in a direction crossing 2a, and the worm 5 is also arranged in a posture having the same crossing angle and is engaged with the worm wheel 4.
[0017]
The female thread portion 4f is formed as a right-hand thread, and the worm wheel 4 is rotated leftward (see arrow 8 in the figure) by rotating the worm 5 clockwise (see arrow 10 in FIG. 1) when viewed from the tension rod screwing side. It is good to set so that
[0018]
As shown in FIG. 10A, an arcuate recess 4a into which a part of the worm 5 is fitted is preferably formed at the center of the worm wheel 4 in the tooth width direction.
[0019]
As shown in FIG. 5, the worm 5 is integral with the rotational force transmission rod 7, and it is convenient that the worm 5 can be taken out from the wheel interior type columnar receiver 2 after the operation of joining the structural members.
[0020]
As shown in FIG. 5, a bearing portion 11 that allows rotation of the worm 5 but prevents forward movement may be formed at a location where the worm 5 of the wheel interior type columnar receiver 2 is disposed. .
[0021]
As shown in FIG. 11, a screw hole portion 23 into which a stopper body 21 for screwing back the rotational force transmission rod 7 is screwed into the insertion port 2 t of the rotational force transmission rod 7 of the wheel interior type columnar receiver 2. Is formed. The screw formed in the screw hole is preferably a left-hand screw when the worm 5 is rotated to the right during the joining operation.
[0022]
Referring to FIG. 12, the wheel interior type columnar receiver 2 has a divided structure that is divided into two along the longitudinal direction, and a dent that accommodates a worm wheel, a worm, and a rotational force transmission rod on the mating surface side of each divided body. 25, 27, and 26 are formed, and at least the worm wheel is loaded and facing each other as shown in FIG. Good.
[0023]
Referring to FIG. 2 (a), a wheel interior type columnar receiver 2 in which a worm wheel 4 having a female threaded portion 4f formed at the center is incorporated, and a male threaded portion 3a that engages with the female threaded portion 4f at one end. A tension rod 3 provided, a sleeve body 41 to be screwed into a male screw portion 3b formed at the other end of the tension rod 3, and a connection having a male screw portion 42a to be screwed from the opposite side of the screw hole 41a of the sleeve body. It is set as the structure provided with the rod 42 and the other columnar receiving tool 17 by which the other end of the connecting rod is screwed together. In this way, as shown in the upper part of FIG. 7, first, the other columnar receiver 17 is embedded in the first structural member 13 so as to cross in the vicinity of the joint. After the connecting rod 42 inserted into the first structural member 13 is screwed into the columnar receiving member 17, the portion that does not enter the first structural member 13 is inserted into the second structural member 16, and the male screw portion at the tip thereof The sleeve body 41 is screwed to 42a. On the other hand, the wheel interior type columnar receiver 2 is embedded in the third structural member 36 so as to cross in the vicinity of the joint, and extends through the third structural member 36 and is screwed in advance to the female thread portion 4f of the worm wheel 4. The tension rod 3 is screwed to the sleeve body 41 by the rotation of the worm wheel. The rotation of the sleeve body 41 caused by continuing the rotation of the worm wheel 4 causes the connecting rod 42 to be strongly screwed to the other columnar receiver 17, and the second structural member 16 is connected to the first structural member 13 and the third structural member 36. The operation of being tightened so as to be sandwiched between the two is made possible by the rotation of the torque transmission rod 7 (see FIG. 1).
[0024]
As shown in FIG. 2, the sleeve body 41 is provided with a hook-like portion 41f. When the worm wheel 4 is rotated by the worm 5, the hook-like portion 41f is second as shown in the enlarged display portion in FIG. The structure material 16 can be brought into contact with each other, and finally, the tightness between the first structure material 13 and the second structure material 16 can be improved by the flange-shaped portion 41f and the other columnar receivers 17. Keep it like that. As shown in FIG. 1, the female thread portion 4f is formed as a right-hand thread, and the worm wheel 4 is rotated counterclockwise (see arrow 8) when viewed from the tension rod screwing side by the clockwise rotation of the worm 5 (see arrow 10). The male screw portions 3a, 3b, 42a, and 42b formed at both ends of the tension bar 3 and the connecting bar 42 (see FIG. 2) are preferably right-handed screws.
[0025]
【The invention's effect】
According to the present invention, since the worm gear mechanism is incorporated in the columnar support, a large joining force is generated by meshing the tension rods, or a rotational force is applied to the tension rods in a strongly screwed state. Fastening with the screw element can be realized easily. The torque adjustment for generating the fastening force is much easier than the wedge type, and it is less likely that the torque becomes insufficient or an extraneous torque is applied.
[0026]
Since the worm that rotates the worm wheel that is screwed with the tension bar is operated from the end face side of the columnar support, the operating space is not required on the axial extension side of the tension bar, so in the case of pulling In addition, the applicability is greatly improved even in the case of double pulling. The structural material that is the object to be joined does not cause a large cross-sectional defect, and the fastening metal fitting itself does not have a cross-sectional defect part, so that the metal fitting is further reduced in size and lightened.
[0027]
If the rotational force transmission rod is inserted from the end face in the direction crossing the axis of the columnar holder, and the worm is placed in the posture with the same crossing angle and meshed with the worm wheel, it will be in the wheel interior type columnar holder. The worm gear mechanism and the rotational force transmission rod can be stored compactly. In addition, since the rotational force transmission rod extends so as to extend from the axis of the wheel-incorporated columnar holder, the electric tool for rotating the rotational force transmission rod is less likely to interfere with a nearby structural material. This improves operability for binding.
[0028]
The direction of the spiral winding of the worm is adjusted so that the female thread provided on the worm wheel to which the tension rod is screwed is a right-hand thread, and the worm wheel is rotated counterclockwise by the right rotation of the worm when viewed from the tension rod screwing side. If it is set, when the worm is rotated to rotate the worm wheel, the screwing of the female thread portion and the tension rod can be promoted. When screwing proceeds to the meshing end, the tension rod is rotated clockwise by a worm wheel that rotates in the columnar support, and the tension rod can be continuously screwed to other screw elements by clockwise rotation. The fastening can be completed by a series of operations.
[0029]
If an arc-shaped recess is formed in the center of the worm wheel in the tooth width direction, a contact area between the tooth surface of the worm wheel and the tooth surface of the worm wheel is recessed. It becomes larger than when there is not, and torque transmission in the worm gear mechanism is facilitated. In addition, the worm axis and the worm wheel are brought close to each other, the space that must be secured in the wheel interior type columnar bracket is narrowed, and this contributes to downsizing as a fastener. Can do.
[0030]
If the worm is integrated with the rotational force transmission rod for rotating it, the worm wheel can be rotated remotely by rotating the end of the rotational force transmission rod in the end space of the wheel interior type columnar support Can be made. Needless to say, the rotation force transmission rod is pushed in at the time of rotation, but the worm can be taken out together with the rotation force transmission rod if it is rotated slightly backward.
[0031]
As a result, only the worm wheel remains in the columnar holder after the tightening operation, and the worm can be used to rotate the worm wheel of the columnar holder embedded in another place. If the worm is made into a tool in this way, the number of parts of the fastening hardware is also reduced, and it becomes possible to provide an inexpensive hardware.
[0032]
If a bearing is provided at the far end of the location where the worm of the wheel-mounted columnar support is placed, this will prevent the worm being pushed forward and prevent the worm from moving forward in the axial direction, and maintain stable rotation of the worm. Smooth engagement of the female thread portion of the worm wheel and the tension rod is achieved.
[0033]
If a screw hole is formed to screw the stopper body into the insertion port of the rotational force transmission rod of the wheel interior type columnar holder, the stopper body prevents the rotational force transmission rod from retreating, and the worm rotates during the worm reverse operation. And the worm wheel can be prevented from being disengaged. As a result, even if the worm tends to be pushed out during reverse rotation, the worm wheel can be stably rotated and the tension bar can be released from the female thread portion.
[0034]
If the screw hole for screwing the stopper body that prevents the rotational force transmission rod from retreating is a left-hand thread, when the rotational force transmission rod is rotated in the reverse direction, the stopper body is dragged by the rotation and screwed. The loosening of the worm wheel and the worm wheel can be maintained, and stable reversal of the worm wheel can be ensured.
[0035]
If the wheel interior type columnar holder is divided into two parts along the longitudinal direction, and if the dent to accommodate the worm wheel, worm, and rotational force transmission rod is formed on the opposite side of each divided body, then at least It is easy to manufacture a columnar receiver that exerts a tightening force by the worm gear mechanism by welding and integrating the peripheral portions of the joint surface with the worm wheel loaded and facing.
[0036]
A wheel-incorporated column-shaped holder in which a worm wheel that forms an internal thread portion is internally provided; a tension bar having an external thread portion that engages with the internal thread portion at one end; a sleeve body that is screwed into an external thread portion formed at the other end; If a connecting rod having a male threaded portion screwed from the opposite side of the screw hole of the sleeve body and another columnar receiver having a female threaded portion to which the other end of the connecting rod is screwed are provided, the worm The wheel can be rotated to screw the tension rod to the sleeve body, and the connecting rod can also be strongly screwed to the other columnar receiver through the rotation of the sleeve body. As a result, the structural material can be assembled by a series of operations of the rotational force transmission rod, and it is also possible to perform double pull fastening at a location where the joining operation is impossible on the axis.
[0037]
If the sleeve is provided with a hook-like portion and the hook-like portion can be brought into contact with the second structural member when the tension rod is rotated by the worm through the worm wheel, the hook-like portion and the other The tightness between the first structural material and the second structural material can be improved by the columnar support.
[0038]
The female thread part of the worm wheel is provided with a right-hand thread, and the worm's spiral winding direction is set so that the worm wheel rotates counterclockwise as viewed from the tension rod screwing side by rotating the worm to the right. If the male thread portions formed at both ends of each rod are set as right-hand threads, the tightening operation of the double-drawing metal fittings is achieved as a series of movements by the right-hand rotation operation of the rotational force transmission rod.
[0039]
DETAILED DESCRIPTION OF THE INVENTION
Below, the screw type connector for building structure materials which concerns on this invention is demonstrated in detail based on drawing which showed the embodiment. FIG. 1 is a perspective view showing a main part of a screw-type connector 1 for a building structure material capable of tightly bonding wood structure materials, which are objects to be joined, and respective rotation directions.
[0040]
This metal fitting is attached to a cylindrical holder 2 made of metal or hard plastic that is buried so as to cross in the vicinity of the joint of the structural material, and an internal thread portion provided at a middle portion in the longitudinal direction of the cylindrical holder. A tension bar 3 screwed through another structural material (a workpiece to be joined), and a clamping force can be exerted on the opposing structural material via a retaining portion (not shown) at the other end of the tension bar. It is what I did.
[0041]
More specifically, a worm gear mechanism 6 including a worm wheel 4 and a worm 5 for rotating the worm wheel 4 is introduced into the cylindrical receiver 2. The worm wheel 4 is mounted in a substantially central portion in the longitudinal direction of the cylindrical receiving member 2 so as to be free to rotate, and a female screw portion 4f into which the tension rod 3 is screwed is formed at the central portion.
[0042]
As shown in FIG. 2 (a), the wheel interior type cylindrical receiver 2 is provided with a fitting hole 2h substantially concentric with the axis of the female screw portion 4f, and the male screw portion 3a of the tension bar 3 and its The shaft portion 3s in the vicinity of the base portion can be inserted. In the figure, the insertion hole 2h is a transverse hole penetrating the cylindrical receiver 2 in the diametrical direction, and is slightly larger than the outer diameter of the male screw portion 3a.
[0043]
The worm 5 engaged with the outer peripheral portion of the worm wheel 4 is integrated with the rotational force transmitting rod 7 as shown in FIG. 3A, and is an end face of the wheel interior type cylindrical receiver 2 shown in FIG. It can be turned by the rotational force transmission rod 7 inserted from 2e. As shown in FIG. 4, the insertion opening 2t for that purpose is opened obliquely, and the rotational force transmission rod 7 is inserted at an intersecting angle .alpha. With respect to the axis 2a of the cylindrical holder 2 as shown in FIG. . Incidentally, the selection of the angle may be determined in consideration of main dimensions such as the diameter of the cylindrical holder 2 and the diameter of the worm wheel 4 each time.
[0044]
Of course, the worm 5 is arranged in the posture having the same crossing angle as the rotational force transmission rod 7 and is engaged with the worm wheel 4. However, if the worm 5 is pulled out after being slightly reversed, It can be taken out from the columnar receiver 2. Accordingly, only the worm wheel 4 is left in the columnar receiver 2 after the tightening operation, and the worm can be used for rotating the worm wheel of the columnar receiver embedded in another place thereafter. .
[0045]
Regardless of whether the rotational force transmission rod is integrated with the worm 5 or separated from the worm 20 as shown in FIG. As will be described, the male screw portion 3a preliminarily engaged with the female screw portion 4f shown in FIG. It is possible to apply a rotational force in the direction of the arrow 9 to the tension rod 3 that is screwed or strongly screwed. The female thread portion 4f is formed as a right-hand thread, while the worm wheel 4 is rotated leftward (arrow 8) when viewed from the screwing side of the tension rod 3 by the rightward rotation of the arrow 10 of the worm 5. The direction of the spiral winding is set.
[0046]
By the way, as shown in FIG. 5, the wheel interior type cylindrical receiver 2 has a bearing portion 11 that allows rotation of the worm 5 and prevents forward movement at a position where the worm 5 is disposed. Is formed (see also FIG. 6, which is a cross-sectional view drawn by removing the worm gear mechanism 6 from the cylindrical receiver 2). That is, there is provided a recess that restricts the axial displacement of the worm 5 that is operated to rotate freely, and also exhibits a bearing function that suppresses rotational shake. Therefore, a substantially sharpened portion 5a is formed at the back end of the worm 5 as shown in FIG. 5 so that the rotation can be stabilized by using a needle bearing mechanism.
[0047]
If the structural metal fitting is configured as described above, the fastening force can be easily generated as described below. First, the case where it applies to the part A of FIG. 7 is demonstrated. In this case, the tension bar 3 is provided with a male screw portion 3a which is screwed with the cylindrical receiver 2 at one end, and a retaining portion 3k is provided at the other end. The wheel interior type cylindrical receiver 2 is embedded so as to cross in the vicinity of the joint of the diagonal member 12 so that the axis of the internally mounted worm wheel 4 is vertical.
[0048]
The head 3h and the washer 3w constituting the retaining portion are inserted into the beam 13 in an upward position, and the male screw portion 3a of the tension rod 3 is lightly engaged with the female screw portion of the worm wheel 4. If a shallow groove 2g perpendicular to or parallel to the axis of the worm wheel 4 shown in FIG. 1 is formed on the other end face of the cylindrical holder 2, the female screw in the case of FIG. The opening posture can be corrected by knowing the opening direction of the part and inserting a thin iron piece and rotating it.
[0049]
Next, as shown in FIG. 5, the rotational force transmission rod 7 is inserted into the cylindrical holder 2 and is rotated lightly so that the worm 5 at the tip is engaged with the worm wheel 4. An operator is positioned in the space in front of the paper surface of FIG. 7, and the chucked portion 14 of FIG. 5 is gripped by the electric tool and rotated in the direction of the arrow 10. The worm 5 is operated in a pushing manner, but the axial movement of the worm 5 is prevented and stable rotation of the worm 5 is ensured. And screwing proceed smoothly.
[0050]
If the rotational force transmission rod 7 is rotated until a desired torque is generated, the male thread portion 3a of the tension rod 3 is drawn into the cylindrical holder 2 by the rotation of the worm wheel 4, and a desired axial force is applied to the tension rod 3. Can be made. Since the tightening force is generated through the pull-out preventing portion 3k of the tension bar, the diagonal member 12 and the horizontal member (beam) 13 are tightly coupled.
[0051]
By the way, the rotational force transmission rod 7 may be inserted from the end face 2e in parallel with the axis 2a of the cylindrical holder 2 as shown in FIG. 9, but it should be inserted in the intersecting direction as shown in FIG. In this case, the worm gear mechanism 6 and the rotational force transmission rod 7 can be stored in the cylindrical holder 2 in a compact manner. In addition, since the rotational force transmission rod 7 is configured to extend away from the axis of the cylindrical holder 2, an electric tool (not shown) that rotates the rotational force transmission rod may interfere with a nearby structural material. In many cases, the operability for tightening can be improved.
[0052]
Needless to say, the rotational force transmission rod 7 can be rotated through the hexagon wrench hole 14a as shown in FIG. The receiving device 2 is not limited to a cylindrical shape, and may have a polygonal cross section, for example, and can be embedded so as to be inserted into a structural material, and it is desired to avoid unnecessary stress concentration. It is sufficient that the columnar body can receive the joining force of the size.
[0053]
Further, the insertion hole 2h (see FIG. 2A) provided in the columnar holder may be a transverse hole as described above, or the male screw portion 3a is inserted as shown in FIG. 2B. It may be a bag-like hole 2n that can only stay. However, if the transverse hole is used, the male threaded portion 3a can be screwed into the worm wheel 4 even if the columnar receiver 2 in FIG. It is also possible to reverse the inclination of the rotating force transmission rod 7 shown in FIG. Accordingly, it is possible to leave room for selection in the setting of the rotational force transmission rod 7 according to the upsetting state of the neighboring structural material, and the convenience is improved as described above.
[0054]
Incidentally, the interior of the worm wheel 4 to the columnar holder 2 will be described later. In order to smooth the rotation and suppress friction during transmission of the rotational force from the worm 5, a lubricant such as grease is provided in the columnar holder. Or may be inserted after applying grease to the worm 5.
[0055]
Returning to FIG. 7, the case where the present invention is applied to portions B and C will be briefly described below. In the portion B, the tension bar 3 is an anchor bolt, the lower end portion bent in a U shape functions as a retaining portion, and the shaft portion extends upward through the base 15. In this case, the column 16 in which the wheel interior type columnar receiver 2 is embedded in advance is lowered, the shaft portion of the anchor bolt is inserted, and when reaching the columnar receiver 2, a rotational force transmission rod (not shown) is turned to turn the male screw at the tip. The portion may be screwed into the female thread portion of the worm wheel and tightened.
[0056]
In the portion C, the retaining portion of the tension bar is the screw hole engraved columnar receiver 17 introduced in Japanese Patent Laid-Open No. 9-60124, and the male thread portion 3c formed at the other end of the tension rod 3 is the diagonal member 18. It is pre-screwed to the columnar receiving member 17 embedded in. The tension rod 3 protruding leftward from the diagonal member 18 is passed through the column 16, and the shaft portion protruding to the left from the column 16 is inserted into the diagonal member 12 in which the wheel interior type cylindrical receiver 2 is embedded. When the worm wheel is rotated by the rotational force transmission rod in the columnar receiver 2, the screwing proceeds so that the female screw portion 4 f pulls the tension rod 3.
[0057]
When the screwing reaches the meshing end, the tension rod 3 is rotated clockwise by the internal thread portion 4f that continues to rotate in the columnar support 2, and the tension rod 3 is a screw hole engraved columnar shape that is another screw element. It is rotated clockwise by the receiving member 17 and is strongly screwed. In addition, it is not impossible to use a wheel interior type columnar holder instead of the threaded hole engraved columnar receiver 17 on the diagonal member 18 side, but the threaded hole engraved columnar receiver is cheaper. In the final fastening operation from the columnar receiver 2, it is necessary to prevent the rotation of the worm wheel of the wheel-incorporated columnar receiver, so that the screw hole-engraved columnar receiver is sufficient. Many.
[0058]
As can be seen from the above operation, the worm gear mechanism is interposed in the columnar support. A large bonding force can be generated through the. Although a large number of rotations of the worm are required, the screwing can be completed in a very short time of about 1 second by using a power tool. The torque for generating the binding force is much easier to adjust than the wedge type described in the section of the prior art.
[0059]
Since the worm that rotates the worm wheel is operated from the end face side of the columnar support, the space for operation is not required on the axial extension side of the tension bar, and the applicability of the tightening bracket can be improved even for single pulling. Greatly improved. Of course, the structural material that is the object to be joined does not cause a large cross-sectional defect, and the cross-sectional defect part is not formed in the fastening metal fitting itself, so that the size of the metal fitting is reduced and the weight can be easily reduced.
[0060]
In the above example, the female thread provided on the worm wheel to which the tension rod is screwed is set as a right-hand thread, and the worm wheel is rotated counterclockwise as viewed from the tension rod screwing side by the right rotation of the worm. Since the direction of the spiral winding is set, when the worm wheel is rotated by rotating the worm, the female thread part and the tension rod are slightly engaged or the tip of the male thread part is dropped into the inlet of the female thread part. In that case, the subsequent rotation of the worm is a self-contained operation that promotes screwing.
[0061]
FIG. 3A shows an example in which the worm 5 and the rotational force transmission rod 7 are integrated, but in this case, the number of parts as a fastening metal fitting can be reduced, and an inexpensive metal fitting can be provided. Become. However, the present invention is not limited to this, and an engaging claw 19a such as a Phillips screwdriver may be formed at the tip of the rotational force transmission rod 19 and an engaging groove 20a may be provided at the base of the worm 20 as shown in FIG. .
[0062]
Although the worm wheel 20 as well as the worm wheel 4 is left in the columnar holder 2, the worm 20 can be rotated by grasping the outer end portion of the rotational force transmitting rod 19 and rotating it in the end space of the wheel interior type columnar holder. Can still be turned remotely.
[0063]
If the contour of the storage space 2s of the worm 5 is matched to the outer shape of the worm 20 as shown in the figure, the axial displacement of the worm 20 is less likely to occur, so the pushing force against the rotational force transmission rod 19 during rotation is reduced. be able to. On the other hand, the rotational force transmission rod 19 is taken out only by pulling, and therefore, only the rotational force transmission rod can be reused as a tool, but it greatly contributes to the efficiency of the tightening work.
[0064]
In addition, although it does not draw like the tenon provided in the joint in the part of A thru | or C of FIG. 7, it does not cause trouble in particular in forming a tenon. When a tenon is provided, a tension bar may be disposed so as to penetrate the tenon. However, since the tightening force is greatly exerted according to the tightening bracket, the number of tenons can be omitted in many cases. And since it becomes easy to arrange | position a tension rod on the axis line of a structural material, in the example mentioned above, such arrangement | positioning can be easily implement | achieved in the B part of FIG. 7, and the D part mentioned later. it can.
[0065]
This makes it possible to equalize the force distribution at the joint and prevent a biased force from being applied. The object of application of the binding metal fitting is mainly a wooden building structural material, but even a structural material of other materials can be applied as long as it is a structural material that can embed a columnar support. The size may be appropriately selected according to the cross-sectional area and cross-sectional shape of the structural material to be applied.
[0066]
Incidentally, as shown in FIG. 2 as well, as shown in an enlarged view in FIG. 10A, an arcuate recess 4a into which a part of the worm 5 fits in the center of the worm wheel 4 in the tooth width direction is provided. Form it. In this way, the contact area between the tooth surface 5t of the worm formed in a spiral shape and the tooth surface 4t of the worm wheel becomes larger than the case where there is no dent in FIG. 10B (thickly hatched portion) Torque transmission in the worm gear mechanism is facilitated.
[0067]
In addition, the distance La between the worm axis 5s and the worm wheel axis 4s can be made shorter than Lb in the case of (b), and the storage space that must be secured in the wheel interior type columnar support is reduced. It is possible to contribute to the downsizing of the fastening hardware.
[0068]
The above description has described the operation of joining the structural materials using the fastening hardware. By the way, it is almost impossible to remove the structural material once joined during construction of the building, but it cannot be said that the necessity is urged. Therefore, an operation of reversing the worm wheel by the worm gear mechanism and releasing the male threaded portion of the tension rod from the female threaded portion of the worm wheel will be described below.
[0069]
Now, the male screw part is in a state of being strongly screwed to the female screw part. This means that the male screw part is screwed to the female screw part up to its thread forming end, and an axial force acts on the tension bar. Means that The tensile force is attracted to the worm wheel by this axial force, but the reaction force is received by the tensile rod screwing side wall 25w of the wheel storage space 25 shown in FIG. .
[0070]
Therefore, if the worm 5 is to be rotated in the opposite direction to that shown in FIG. 1, the friction at the contact surface must be overcome. However, when the worm 5 is reversed, as can be imagined from FIG. 5, the worm 5 is easily removed by the movement guided by the tooth surface of the worm wheel 4 which is not easily rotated. The male screw portion 3a cannot be detached from the female screw portion 4f.
[0071]
Therefore, in the present invention, a stopper body 21 as shown in FIG. 11 is prepared, and consideration is given to stop the rotational force transmission rod 7 from coming out when the arrow 22 is reversed. The stopper body 21 at the right end of the figure shows the appearance in a state where it faces the rotational force transmission rod 7, and the middle portion 21 shows a state where it is inserted into the rotational force transmission rod 7.
[0072]
In the case of this example, a screw hole portion 23 for screwing a hollow stopper body 21 for preventing the rotational force transmission rod 7 from retreating is formed in the insertion port 2t. On the other hand, the stopper body 21 has a vertical through hole 21a for fitting a part of the shaft of the rotational force transmission rod 7 and also has a stopper portion 21s that abuts against a step 7p provided in the middle body portion of the rotational force transmission rod 7. Prepare.
[0073]
The stopper portion 21s is formed at the tip of the male screw portion 21m to be screwed into the screw hole portion 23. Therefore, if the male screw portion 21m is screwed to the full screw hole portion 23, the rotational force transmitting rod 7 in a state where it has entered deeply is inserted. It can be brought into contact with the step 7p. In this case, the depth of the screw hole portion 23, the length of the male screw portion 21m, the position of the step 7p in the rotational force transmission rod 7, etc. are determined so as to correspond to the desired operation.
[0074]
In addition, if a grip 21g as shown in the figure is provided as an operation part for screwing the stopper body 21 and the surface is knurled or a twisting handle 21h represented by an imaginary line is provided, Screwing operation becomes easy. When this operation part is not provided, if a groove as indicated by the symbol 2g in FIG. 1 is provided at the rear end of the male screw part 21m, a screw hole part can be obtained by hooking and turning a thin iron piece. 23 can be easily screwed. On the other hand, if the operation portion is provided, a step 21p can be formed at the tip thereof as shown in FIG. 11, and it can be brought into contact with the seat surface 2z provided near the entrance of the insertion port 2t.
[0075]
Also by this, the return prevention of the rotational force transmission rod 7 is achieved by the contact between the step 7p provided at the middle body portion of the rotational force transmission rod 7 and the stopper portion 21s at the tip of the male screw portion 21m of the stopper body 21. . In any case, the screw formed in the screw hole portion 23 to which the stopper body is screwed is used when the male screw portion 3a of the tension rod 3 is screwed into the female screw portion 4f of the worm wheel 4 as shown in FIG. When the worm 5 is rotated to the right, the left screw is used.
[0076]
In this way, when the rotational force transmission rod 7 is reversely rotated (left rotation: arrow 22), the stopper body 21 is not dragged by the rotation and loosened from the screw hole 23. If the reverse rotation of the rotational force transmission rod 7 is prevented by the stopper body 21, the worm 5 and the worm wheel 4 are prevented from being disengaged, and the worm 5 stably reverses the worm wheel 4. Thus, the male thread 3a of the tension bar 3 can be released from the female thread 4f. Incidentally, in the example of FIG. 8, since the worm 20 is hardly displaced in the axial direction, it is not necessary to prepare a stopper body or provide a screw hole.
[0077]
Next, a columnar holder that can be equipped with a worm wheel will be described. First, a round bar having a length suitable for the width of the structural material to be embedded is prepared, and divided into left and right at the position of the imaginary line 24 in the end face 2e shown on the right side of FIG. The left side of the drawing shows a cross-sectional view of the columnar receiver 2, and the description will be made assuming that the hatched portion is a divided surface divided along the longitudinal direction.
[0078]
A storage recess 25 having a circular outline that slightly exceeds the half-thickness of the worm wheel, and insertion / removal for fitting the worm and the rotational force transmission rod to the half-thickness so as to be connected to the dividing surface of each divided body. The recess 26 and a bearing recess 27 corresponding to a half thickness for forming the bearing portion 11 are carved at the tip thereof. In the case of FIG. 5, only the worm wheel 4 is loaded, and in the case of FIG. 8, the worm wheel 4 and the worm 20 are loaded into the corresponding storage recesses of one divided body, and the other divided bodies are combined into a columnar shape. return.
[0079]
What is necessary is just to shape so that a useless protrusion may not remain | survive by sanding a welding part etc. by carrying out appropriate welding to a mating surface peripheral part in the state which face-to-face contact. If it does in this way, it can be set as the column-shaped holder which equipped the worm gear mechanism internally, The stable movement can be ensured and the desired clamping force can be exhibited.
[0080]
FIG. 12 is an example of a divided product obtained by forging an ingot on a mold. In addition to the required recesses 25, 26, 27, there is also provided a recess 28 for reducing the weight by dropping the waste as necessary. Small protrusions 29 and 29 are provided on one mating surface, and small recesses 30 and 30 are formed at corresponding positions on the other. If these are fitted as shown in FIGS. 13 (b) and 13 (c), the receiving recesses 25, 26 and 27 are naturally in a completely desired shape as the receiving space.
[0081]
Since some chamfered portions 31 are provided at the edge as shown in FIG. 12, the chamfered portion can be used as a welding groove when performing welding 32 as shown in FIG. The screw hole portion 23 for screwing the stopper body is represented by an imaginary line in FIG. 12, but this is given after being integrated into a cylindrical shape by welding. Thus, if it is set as a forged product, mass production becomes easy and cost reduction is also facilitated.
[0082]
By the way, the worm 5 has a substantially sharp portion 5a (see FIG. 5) to stabilize its rotation, but instead of the tool 33 shown in FIG. 3 (a), the substantially sharp portion shown in (b). It is good also as the tool 34 which does not have a part. This is because the tip 5p of the worm 5 is substantially flat, so that the contact surface 2b as shown in FIG.
[0083]
In this case, if not all of the tooth tips of the worm 5 can be accommodated in the columnar receiver 2, a part of the teeth may be dazed as shown in the figure. Although the peeping portion 35 is as if the surface of the columnar receiver was torn, it does not particularly hinder the application of a tightening force to the structural material. If the structural material is wood or the like, the peeping worm will cut out the structural material, but this is also not a problem.
[0084]
The above has described the case of the single-drawing structure. Next, the double pulling structure will be described. Referring to FIG. 2A, in this case, the above-described wheel interior type columnar receiver 2 is formed at the other end of the tension bar 3 provided with one end of a male screw portion 3a screwed to the female screw portion 4f. A sleeve body 41 to be screwed into the male screw portion 3b, a connecting rod 42 having a male screw portion 42a to be screwed into a screw hole 41b on the opposite side of the screw hole 41a of the sleeve body, and a male screw portion 42b at the other end of the connecting rod. Is constituted by another columnar receiving member 17 having a female screw portion 17f to which is screwed. In this example, the tension bar 3, the sleeve body 41, and the connecting bar 42 correspond to the tension bar, and the columnar support 17 corresponds to the retaining portion.
[0085]
Incidentally, if the male screw is representatively described, the male screw portions 3a, 3b, 42a, and 42b are all right-handed screws. The columnar receiver 17 may be the screw hole engraved columnar receiver described in the section of the prior art, or may be a wheel interior columnar receiver. In any case, it is preferable that the male screw portion 42b is penetrated so that the screwing can be completely completed. There is no problem as long as a structural material that can be cut off by protruding the tip of the male screw from the columnar support is adopted. Of course, when there is a hindrance to the protrusion of the screw, dimensional considerations should be taken so that the tip of the male screw portion stays in the columnar receiver.
[0086]
The tight fitting made of such a member is applied to a portion D in FIG. First, the screw hole engraved columnar receiver 17 as another columnar receiver is embedded in the beam 13 as the first structural material shown in FIG. 15, and the connecting rod 42 inserted into the beam 13 is used as the columnar receiver 17. The female screw portion 17f is screwed. After the portion that could not be accommodated in the beam 13 is inserted into the through column 16 that is the second structural member, the sleeve body 41 is screwed to the male screw portion 42a at the other end as shown in FIG. As shown in FIG. 4, the sleeve body 41 is provided with a cut groove 41 g extending in the left-right direction in the figure, and the sleeve body 41 may be rotated by hanging a thin iron piece 43 represented by an imaginary line in FIG.
[0087]
On the other hand, in the beam 36 (see FIG. 16) which is the third structural member, the wheel interior type columnar receiver 2 is embedded so as to cross in the vicinity of the joint, and extends through the beam 36 and is an internal thread portion of the worm wheel 4. The male threaded portion 3a of the tension bar 3 reaching 4f is screwed in advance to the screw end. The screw engagement with the female threaded portion 17f of the screw hole engraved type columnar receiver 17 and the threaded engagement with the male threaded portion 42a of the sleeve body 41 may be about a temporary engagement. In the wheel interior type columnar receiver 2, although the male screw portion 3a is screwed to the screw end, it may be slightly insufficient.
[0088]
The beam 36 is carried so that the male screw portion 3b of the tension rod 3 faces the screw hole 41a of the sleeve body 41. When alignment is obtained by slightly engaging the tip of the tension rod 3 with the sleeve body 41, the tool 33 or 34 (see FIG. 3) is inserted into the wheel interior type columnar receiver 2, and is rotated clockwise by the electric tool. When the worm wheel 4 is rotated counterclockwise, the male threaded portion 3a of the tension rod 3 is fully screwed into the female threaded portion 4f as shown in FIG. In this case, the worm wheel 4 and the tension bar 3 are integrated, and therefore a rotational force is applied to the tension bar 3 that is strongly screwed.
[0089]
As shown in FIG. 1, the tension bar 3 rotates clockwise with respect to the sleeve body 41 (see the arrow 9), so that the male screw portion 3b advances the screwing with the screw hole 41a. When the male screw portion 3b is screwed to the end of the screw hole, the sleeve body 41 starts to rotate clockwise. When the screwing of the connecting rod 42 (see FIG. 2A) with the male screw portion 42a proceeds and the male screw portion 42a advances to the screw end of the screw hole 41b, the connecting rod 42 starts to rotate clockwise.
[0090]
As a result, the male threaded portion 42b of the connecting rod advances the screwing with the female threaded portion 17f of the threaded hole engraving type columnar receiver 17. If the worm 5 is rotated until a predetermined torque is generated, the wheel interior type columnar receiver 2 and the screw hole engraved columnar receiver 17 are connected to the tension bar 3 and the sleeve body 41 as shown in FIG. , Drawn by the connecting rod 42. As a result, the through column 16 is strongly sandwiched between the beams 13 and 36, and the fastening operation is realized regardless of the location where the joining operation is normally impossible.
[0091]
By the way, as shown in FIG. 1, when a hook-like portion 41 f is provided in a part of the sleeve body 41, for example, substantially in the center, and when the tension rod 3 is rotated by the worm 5 via the worm wheel 4, If 41f is in contact with the through-column 16 as shown in FIG. 7 (see the enlarged portion in the figure), the beam 13 and the through-column 16 are connected to each other by the hook-shaped portion and the threaded hole engraving-type column-shaped receiving member 17. The tightness state can be increased.
[0092]
It should be noted that the screw engagement in the sleeve body 41 is not limited to the screw end of the screw holes 41a and 41b in FIG. 2A, but the screw ends of the male screw portions 3b and 42a as shown in FIG. Or it is good also as it is until the external thread part 3b collides with the external thread part 42a like (c). Further, although it is not necessary to provide a tenon, it is also possible to provide a tenon 45 and a tenon hole 46 as shown in FIG.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a main part of a screw-type connector for a building structure material according to the present invention.
FIG. 2 is a cross-sectional view of a double-drawing structure and a screwed state diagram of each male screw portion in a sleeve body.
FIG. 3 is a configuration diagram of a worm when it is integrated with a rotational force transmission rod into a tool.
FIG. 4 is an external view of a metal fitting with a double-drawing structure.
FIG. 5 is a sectional view showing a state in which a worm gear mechanism is built in a columnar receiver.
FIG. 6 is a configuration diagram of the columnar receiver with the worm gear mechanism removed.
FIG. 7 shows an application example to a structural material.
FIG. 8 is a cross-sectional view in which a worm separated from a rotational force transmission rod is applied to a columnar holder.
FIG. 9 is a cross-sectional view when a worm is installed so as to be parallel to the axis of the columnar holder.
FIG. 10 is an explanation of meshing between a worm and a worm wheel, (a) is a cross-sectional view when the teeth of the worm wheel have an arc-shaped dent into which a part of the worm fits in the center in the width direction; b) is a cross-sectional view when there is no dent.
FIG. 11 is a cross-sectional view of a columnar receiver that uses a stopper body to realize reverse rotation of a worm wheel.
FIG. 12 is a configuration diagram of each divided body in a case where the columnar receiver is divided into two structures.
FIG. 13 is an external view when a divided body is combined into a columnar receiver.
FIG. 14 is a cross-sectional view when a worm having no sharp bearing portion is employed.
FIG. 15 is an operation explanatory view showing a state in which a metal fitting is assembled in a structural material and the structural material is assembled.
FIG. 16 is an operation explanatory diagram following FIG. 15;
FIG. 17 shows an example of application of a conventional fastening metal fitting to a structural material.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Screw type connector for building structural materials, 2 ... Column-shaped holder (wheel interior type cylindrical receiver), 2a ... Axis, 2e ... End face, 2h ... Insertion hole, 2n ... Bag-shaped hole, 2s ... Storage space, 2t ... insertion port, 3 ... tension bar, 3a-3c ... male screw part, 3k ... retaining part, 4 ... worm wheel, 4a ... arc-shaped dent, 4f ... female screw part, 4t ... tooth surface of worm wheel, 5 ... worm 5a ... substantially sharp part, 7 ... rotational force transmission rod, 11 ... bearing portion, 17 ... screw hole engraving type columnar holder, 19 ... rotational force transmission rod, 20 ... worm, 21 ... stopper body, 25 ... for storage Dent (accommodation dent, wheel storage space), 26 ... insertion / removal dent (accommodation dent), 27 ... bearing dent (accommodation dent), 41 ... sleeve body, 41a, 41b ... screw hole, 41f ... saddle-shaped part, 42 ... connecting rod, 42a, 42b ... male screw part.

Claims (11)

A receiver is embedded in the vicinity of the mouth of the building structure material, and a female screw portion that is threadedly engaged with a male screw portion of one end of a tension bar extending through the other structure material is provided in the receiver. An insertion hole into which the male threaded portion of the tension bar can be inserted is formed, and the female threaded part is mounted in a freely swingable manner in the receiver around the axis line that coincides with the axial center of the inserted hole. Formed in the center of the wheel, the outer periphery of the worm wheel is meshed with a worm rotated by a rotational force transmission rod inserted into the receiver, and the male thread part pre-engaged with the female thread part is wormed. A retainer that is formed at the other end of the tension bar and exerts a tightening force by generating a large joining force by strongly screwing it by rotating it or by applying a rotational force to the tension screw that is strongly screwed Tying together structural materials In Kill way architectural structural member joining fixtures,
The receiver has a columnar shape that is embedded in the vicinity of the joint and crosses the building structure material, the female screw portion is disposed at a middle portion in the longitudinal direction of the receiver, and the rotational force transmission rod intersects the axis of the columnar receiver. A screw-type connector for building structural materials, wherein the screw is inserted from the end face of the receiver in the orientation to be placed, and the worm is arranged in a posture having the same crossing angle and is engaged with the worm wheel.   The said internal thread part is formed in the right-hand thread, The said worm wheel is set so that it may turn left when seeing from the tension rod screwing side by the right rotation of the said worm. Screw type connector for building structural materials.   An arc-shaped recess into which a part of the worm is fitted is formed at the center in the tooth width direction of the worm wheel. .   The said worm is integral with a rotational force transmission rod, and can be taken out from the said columnar support of a wheel interior type after joining operation of a structural material. The screw-type connector for building structural materials described in the item.   5. A bearing portion that allows rotation of the worm but prevents forward movement is formed at a location where the worm of the wheel interior type columnar support is disposed. The screw type connector for building structural materials described in any one of the above.   The screw hole portion into which the stopper body for preventing the rotational force transmission rod from retreating is formed at the insertion opening of the rotational force transmission rod of the wheel interior type columnar receiver. 5. A screw-type connector for building structural materials described in 5.   The screw formed in the screw hole portion to which the stopper body is screwed is a left-hand screw when the worm is rotated to the right during the joining operation. Threaded joint for building construction materials.   The wheel interior type columnar receiver has a divided structure divided into two along the longitudinal direction, and a recess for accommodating the worm wheel, the worm, and the rotational force transmitting rod is formed on the mating surface side of each divided body, and at least the worm 8. The column-shaped receiving device is integrated by welding the peripheral surfaces of the mating surfaces in a state where the wheels are loaded and faced to each other. Screw-type joints for building construction materials. A wheel interior type columnar receiver in which a worm wheel that forms a female thread portion at the center portion according to claim 1 is installed, a tension rod provided at one end with a male thread portion that engages with the female thread portion, and the tension rod A sleeve body screwed into a male screw portion formed at the other end of the sleeve, a connecting rod having a male screw portion screwed from the opposite side of the screw hole of the sleeve body, and the other end of the connecting rod screwed together With a columnar receiver,
The other columnar receiver is embedded in the first structural material so as to cross in the vicinity of the joint, and after the connecting rod inserted into the first structural material is screwed into the columnar receiver, the first structural material is The portion that did not enter is inserted into the second structural material, and the sleeve body is screwed onto the male threaded portion at the tip, while the wheel-structured columnar receiver crosses in the vicinity of the joint. A sleeve produced by continuing the rotation of the worm wheel while the worm wheel rotates and the tension rod embedded in the third structural member and screwed in advance to the female thread portion of the worm wheel is screwed to the sleeve body. An operation of tightly screwing the connecting rod with the other columnar holder by rotating the body and clamping the second structural member between the first structural member and the third structural member is the rotational force. What has been made possible by the rotation of the transmission rod Building construction materials for threaded connectors to symptoms.   The sleeve body is provided with a hook-like portion, and when the worm wheel is rotated by the worm, the hook-like portion is brought into contact with the second structural member, and the hook-like portion and the other columnar shape are provided. The screw-type connector for building structure material according to claim 9, wherein the tightness between the first structure material and the second structure material can be improved by the support.   The female thread portion is formed as a right-hand thread, and the worm wheel is set to rotate counterclockwise when viewed from the tension rod screwing side by the right rotation of the worm, and is formed at both ends of the tension rod and the connecting rod. The male screw part is a right-hand thread, The screw-type connector for a building structure material according to claim 9 or 10, characterized in that:

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