JP2003301529A - Screw connector for building structural material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a binding structure applicable to double sliding as well as single sliding without a large sectional defect in a structural material. <P>SOLUTION: A fit-in hole for inserting a male screw part 3a of a pull rod 3 is formed in a cylindrical receiver 2. A female screw part 4f is formed in the central part of a worm wheel 4 interposed in the cylindrical receiver 2 to freely rotate around an axis aligned with the axis of the fit-in hole. The outer peripheral part of the worm wheel 4 is meshed with a worm 5 rotated by a rotating force transmitting rod 7 inserted from the end face 2e of the cylindrical receiver 2. A male screw part 3a previously meshing with a female screw part 4f is strongly engaged by rotation of the worm 5 to generate large joining force or turning force can be applied to the strongly engaged pull rod 3. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw-type connector for a building structure material, and more particularly, to a pillar-shaped receiving member buried so as to cross in the vicinity of a joint of the building structure material and another building structure material. TECHNICAL FIELD The present invention relates to a fixture for joining a building structure material capable of tightly binding a plurality of objects to be joined by a pull rod that penetrates through and is screwed together with a columnar member to form a T shape.

[0002]

2. Description of the Related Art A female screw is formed in the central portion of a metal cylindrical receiver in the longitudinal direction, and a pull rod is screwed into the female screw so that a wooden column and a beam can be tightly attached or the column can be fixed to a base. The binding hardware that is used is well known. For example, an example thereof is described in JP-A-9-60124.

Specifically, the cylindrical receiver has a diameter of, for example, 30 mm and a length of 120 mm.
It is embedded so as to cross the beam at a position separated by about 200 mm from the joint of the 0 mm square beam. A female screw having a diameter of about 10 mm, which is provided so as to traverse at the central portion of the columnar receiving member, has a screw hole engraved type columnar receiving member so that its axis line becomes horizontal, that is, coincides with the beam axis line. The burial posture of the tool is adjusted.

If the pillar is 120 mm square, the diameter is 10
The pull rod 3 shown in the middle part of FIG. 17 having a male screw of mm has a length of about 330 mm, and is inserted horizontally from the side surface of the pillar 16 toward the joint of the beam 51, and then washer is attached to the head portion. If the head 3h is rotated with a spanner or hexagon wrench while scratching 3w, etc., the columnar holder 17 and the washer 3w
The beam 51 can be fixed to the pillar 16 by and.

Such a binding member is provided with an operating space 5 on the extension side in the axial direction of the pull rod for rotating the head of the pull rod.
2 must be ensured, and therefore, the structure cannot be used anymore in the structure shown in the upper part of FIG. 17 in which the beams are arranged at the same height from the left and right with respect to the through column. In that case, as shown in FIG.
6 are provided with recesses 53 and 54 that open upward, and the long pull rod 3A inserted from the pillar 16 toward the beam 13 has a nut 55.
Can be hung. Then, pull the pull rod 3A protruding to the right to the beam 3
The nut 56 is hooked at the recess 54 through the horizontal hole provided in 6.

Compared with the above-mentioned pulling structure, such a pulling structure has a slight risk that the mounting structure is complicated, the assembling work is complicated, and in some cases, the pulling out occurs. There is also. not only that,
A large cross-section loss occurs in the recessed portion, and the strength and rigidity originally possessed by the beam cannot be sufficiently exerted. Of course, since the recess tends to be as shallow as possible, the pull rod tends to be biased toward the upper surface side (in the figure) or the lower surface side of the beam,
Tightness due to the evenly distributed forces at the joint is also difficult to achieve.

When the pillar 16 is attached to the base 15 as shown in the lower part of FIG. 17, an L-shaped metal fitting 57 is used, and an anchor 58 is used for the foundation and a screw rod 59 is used for the pillar. Fixed. This is because there is no room for fixing the pull rod to the cylindrical receiver at this point anymore, and therefore the fixing structure becomes complicated as shown in the figure and the number of parts used increases.

[0008]

By the way, so that the fixing operation of the pull rod can be performed in any fitting, that is, the operation space for screwing the pull rod into the cylindrical receiver is the same as that of the pull rod. Japanese Patent Laid-Open No. 2001-146792 proposes a structure capable of performing a binding operation even if it does not exist on the axial extension line side, and further realizing a double-drawing structure without causing a large cross-section loss. Has been done.

In the case of a T-shaped binding member, the above-mentioned pull 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 the male screw is screwed to the male screw. A possible internal thread is provided at the end, but most of it is solid, and at the location where the cylindrical receiver is inserted, it consists of a second member with a wedge advancing / retreating groove formed. On the other hand, the cylindrical receiving member does not have a female screw in the center thereof and is merely an insertion hole. However, this columnar receiver is hollow, and is a wedge-displacement-type columnar receiver including a wedge body that can be displaced in the axial direction and a child screw that pushes the wedge body backward.

For example, a columnar receiving member is embedded in the beam, and the second member is inserted from the joint of the beam. When the second member is pushed in until the wedge advancing / retreating groove reaches the cylindrical receiver, the wedge body is pushed by the screw thread in the cylindrical receiver so that the wedge is slightly crossed with the second member. The first member is inserted from the opposite side of the pillar, and the male screw protruding from the pillar is screwed into the female screw of the second member. After that, if the wedge body is advanced by rotating the child screw in the cylindrical receiver, the second member moves a little in the axial direction together with the first member, and the wedge action strongly fixes the beam to the column.

The tight fittings attached to the columns and beams will not be removed later, but in case of necessity,
A push screw hole having a smaller diameter than that of the child screw is provided in the cylindrical receiver on the side opposite to the child screw with the wedge body interposed therebetween. If the push-up screw is moved forward after the child screw is retracted and the wedge body is pushed back, a gap is created between the second member and the wedge body, and the tightly connected state can be released. In addition, if the child screw or push screw is rotated by inserting a hexagon wrench from the axial direction of the wedge displacement type cylindrical receiver,
The displacement can be given arbitrarily.

The case where the pulling structure is sufficient is as described above. However, in the case where the pulling structure is the double pulling structure, a sleeve body is used in place of the above-mentioned first member, and the female screw portion of the second member is changed to a male screw. Just keep it. Then, a screw rod, which is a third member, is screwed on the opposite side of the sleeve body, and the opposite end thereof is screwed into the screw hole engraving type column receiver described in JP-A-9-60124. You can leave it. In the final tightening operation, the second member pulls the third member through the sleeve member by advancing the wedge body to the wedge advancing / retreating groove of the second member as described above. This type of tightly bound structure can be applied to any of the locations shown in FIG.

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, so that the child screw is advanced. The required rotational force becomes extremely large. Further, the axial force to be applied to the first member, etc. may be based on the torque applied to the child screw, but the operation to define the amount of advance of the wedge body so as to give a desired amount of axial force. Is a difficult technique. Further, the machining accuracy of the wedge advancing / retreating groove is required to be extremely high.

Furthermore, since a symmetrical wedge advancing / retreating groove is formed in the second member, a defective section is formed in the second member itself, and a thick rod is used to exert a desired binding force. There is also a problem that the size of the binding metal fittings is forced to be increased due to the high pressure. Of course, the advance and retreat of the wedge body is limited to the generation of the fastening force based on the axial displacement of the pull rod, and the pull rod cannot be rotated by the rotation of the child screw. Therefore, all the screwing operations must be completed before the tightening, and there is a drawback that the application as a tightening fitting is narrowed.

The present invention has been made in view of the above problems, and an object thereof is to enable a binding structure which can be applied not only to single pulling but also to double pulling without causing a large cross-section loss in the structural material. The tightening mechanism is simple and has excellent operability, and it is easy to exert stable movement and a desired amount of tightening force.There is less restriction on the tightening operation space, and the metal fitting itself has a section loss. It is an object of the present invention to provide a screw-type connector for a building structure material that realizes that there is no problem.

[0016]

SUMMARY OF THE INVENTION According to the present invention, a columnar receiving member is embedded so as to traverse a building structure material in the vicinity of a joint, and another structure is formed in a female screw portion arranged at an intermediate portion in the longitudinal direction of the columnar receiving member. The external thread of one end of the pull rod extending through the material is screwed,
It is applied to a building structure material joining fixture in which structural materials can be tightly bound to each other by exerting a tightening force through a retaining portion at the other end of the pull rod. The feature is that, with reference to FIG. 1, a fitting hole 2h (see FIG. 2) into which the male screw portion 3a of the pull rod 3 can be inserted is formed in the column-shaped receiving member 2, and the female screw portion is formed. 4f is the fitting hole 2
It is formed in the central portion of a worm wheel 4 which is internally rotatably mounted in the columnar receiving member 2 around an axis matching the axis of h. The outer peripheral portion of the worm wheel 4 is meshed with the worm 5 rotated by the rotational force transmission rod 7 inserted from the end surface 2e of the columnar receiving member 2. The male screw portion 3a previously meshed with the female screw portion 4f can be strongly screwed by the rotation of the worm 5 to generate a large joining force, or the pulling rod 3 that is strongly screwed can be given a rotational force. That is what I did.

The female screw portion 4f is formed in a right-hand thread, and the worm wheel 4 rotates the worm 5 to the right (arrow 10 in FIG. 1).
It is recommended to set so as to rotate counterclockwise (see arrow 8 in the figure) when viewed from the side where the pull rod is screwed.

As shown in FIG. 10 (a), an arcuate recess 4a into which a part of the worm 5 is fitted is preferably formed in the center of the worm wheel 4 in the tooth width direction.

As shown in FIG. 5, the worm 5 is integral with the rotational force transmitting rod 7, and it is convenient to be able to take it out from the columnar receiving member 2 of the wheel internal type after the operation of joining the structural members.

Referring to FIG. 1, the rotational force transmitting rod 7 has an end surface 2 oriented in a direction intersecting an axis 2a of a wheel-installed columnar receiving member 2.
Inserted from e, the worm 5 is also arranged in a posture having the same crossing angle, and is bitten by the worm wheel 4.

As shown in FIG. 5, at the location of the worm 5 of the wheel-integrated columnar bracket 2, the bearing 11 which allows the worm 5 to rotate but prevents it from advancing.
Should be formed.

As shown in FIG. 11, a screw for screwing a stopper body 21 for preventing the rotational force transmission rod 7 from retracting is inserted into the insertion port 2t of the rotational force transmission rod 7 of the wheel-internal type columnar receiving member 2. The hole 23 is formed. The screw formed in the screw hole portion may be left-hand screw when the worm 5 is rotated clockwise during the joining operation.

Referring to FIG. 12, the wheel-integrated columnar receiver 2 has a divided structure divided into two along the longitudinal direction, and a worm wheel, a worm, and a worm are provided on the mating surface side of each divided body.
Recesses 25, 27, and 26 for accommodating the rotational force transmitting rod are formed, and at least a worm wheel is loaded and welding 32 is applied to the peripheral surfaces of the mating surfaces while facing each other as shown in FIG. It is recommended that they be integrated.

Referring to FIG. 2 (a), a wheel-inner type columnar receiver 2 in which a worm wheel 4 having a female screw portion 4f formed in the center is internally mounted, and a male screw portion 3a screwed to the female screw portion 4f. Pull bar 3 with one end, and the pull bar 3
The sleeve body 41 screwed to the male screw portion 3b formed on the other end of the sleeve body, the connecting rod 42 having the male screw portion 42a screwed from the opposite side of the screw hole 41a of the sleeve body, and the other end of the connecting rod. It is configured to include another columnar receiving member 17 to be screwed. In this way, as shown in the upper part of FIG. 7, first, another columnar receiving member 17 is embedded in the first structural material 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 column-shaped receiving member 17, the portion that does not enter the first structural member 13 is the second structural member 1.
6, and the sleeve body 4 is attached to the male screw portion 42a at the tip thereof.
Screw 1 on. On the other hand, the wheel-inner type columnar receiver 2 is embedded in the third structural member 36 so as to traverse in the vicinity of the joint,
The pull rod 3, which extends through the third structural member 36 and is screwed into the female screw portion 4f of the worm wheel 4 in advance, 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 into the other columnar receiving member 17, so that the second structural material 16 becomes the first structural material 13 and the third structural material 3.
The operation of tightly connecting with 6 is made possible by the rotation of the rotational force transmission rod 7 (see FIG. 1).

As shown in FIG. 2, the sleeve body 41 is provided with a collar-shaped portion 41f, and when the worm wheel 4 is rotated by the worm 5, the collar-shaped portion 41f is shown in an enlarged display portion in FIG. So as to be able to come into contact with the second structural member 16, and finally the collar-shaped portion 41f and the other columnar receiving member 1
It is possible to improve the tightness between the first structural member 13 and the second structural member 16 by means of 7. As shown in FIG. 1, the female screw portion 4f is formed in a right-hand thread, and the worm wheel 4 rotates leftward when the worm 5 is rotated rightward (see arrow 10) when viewed from the side where the pull rod is screwed (see arrow 8). ), The pull rod 3 and the connecting rod 42
The male screw parts 3a, 3b, 42a, 42b formed at both ends of each (see FIG. 2) are preferably left-hand threads.

[0026]

According to the present invention, since the worm gear mechanism is built in the columnar receiving member, the pulling rods are engaged with each other to generate a large joining force, or when the pulling rods are strongly screwed together, the pulling rods are rotated. It is possible to easily realize the fastening with another screw element by providing. Torque adjustment for generating the fastening force is much easier than that of the wedge type, and torque shortage or application of extraneous torque is reduced.

Since the worm for rotating the worm wheel screwed with the pull rod is operated from the end face side of the columnar support, the operating space is not required on the extension side of the pull rod in the axial direction. The applicability is significantly improved not only in the case of pulling but also in the case of double pulling. Since the structural material, which is the article to be joined, does not have a large cross-section loss, and the binding metal fitting itself does not have a cross-section loss part, the metal fitting can be downsized and the weight can be reduced.

The female thread portion provided on the worm wheel to which the pull rod is screwed is a right-hand thread, and the worm wheel is a spiral winding of the worm so that when the worm wheel rotates to the right, the worm wheel turns to the left when viewed from the side where the pull rod is screwed. If you set the direction of
When you turn the worm and rotate the worm wheel,
It is possible to promote the screwing of the female screw portion and the pull rod. When screwing proceeds to the meshing end, the pull rod is given a right rotation by the worm wheel rotating in the columnar bracket, and the pull rod can be continuously screwed to another screw element by right rotation. , It becomes possible to complete the fastening by a series of operations.

If an arcuate recess into which a part of the worm fits is formed in the center of the worm wheel in the tooth width direction, the contact area between the tooth surface of the worm and the tooth surface of the worm wheel formed in a spiral shape. Is larger than that when there is no depression, and torque transmission in the worm gear mechanism is facilitated. Moreover, the axis of the worm and that of the worm wheel are brought closer to each other, and the space that must be secured in the wheel-internal columnar receiver is narrowed, which also contributes to downsizing as a binding fitting. You can

If the worm is integrated with the rotational force transmission rod for rotating the worm, the worm wheel can be remoted by rotating the end portion of the rotational force transmission rod in the end space of the wheel-installed columnar receiver. Can be rotated. It is needless to say that the rotation force transmission rod is pushed and rotated at the time of rotation, but the worm can be taken out together with the rotation force transmission rod by lightly rotating in the reverse direction.

As a result, only the worm wheel is left on the columnar receiving member after the binding operation, and the worm should be used to rotate the worm wheel of the columnar receiving member buried in another place thereafter. You can When the worm is made into a tool in this way, the number of parts of the binding metal fitting is also reduced, and it becomes possible to provide a cheap metal fitting.

If the rotational force transmission rod is inserted from the end face in a direction intersecting the axis of the columnar receiver and the worm is also arranged with the same crossing angle and meshed with the worm wheel, the wheel-integrated columnar columnar support The worm gear mechanism and the rotational force transmission rod can be compactly stored in the tool. Not only that, since the rotational force transmission rod has a posture that extends while deviating from the axis of the wheel-inner type columnar receiver, it is less likely that the electric tool that rotates the rotational force transmission rod will interfere with structural materials located nearby. This improves the operability for binding.

If a bearing portion is provided at the rear end of the place where the worm of the wheel-installed columnar support is arranged, it prevents axial movement of the worm which can be freely pushed and operated, and allows stable rotation of the worm. Therefore, the smooth engagement of the female screw portion of the worm wheel with the pull rod can be achieved.

If a screw hole portion for screwing a stopper body is formed at the insertion port of the rotational force transmission rod of the wheel-installed columnar receiver, the stopper body prevents the rotational force transmission rod from retreating and the worm reverses. It is possible to prevent disengagement between the worm and the worm wheel during operation. As a result, even if the worm tends to be pushed out at the time of reverse rotation, the worm wheel can be stably rotated, and the pull rod can be released from the female screw portion.

If the screw hole for screwing the stopper body for preventing the retreat of the rotational force transmission rod is a left-hand thread, the stopper body is not pulled when the rotational force transmission rod is rotated in the reverse direction. It will not be loosened from the screw hole, and the worm and worm wheel can be kept in mesh with each other to ensure a stable reverse rotation of the worm wheel.

If the wheel-inner type columnar receiver is divided into two along the longitudinal direction and has a split structure, and a recess for accommodating the worm wheel, the worm and the rotational force transmitting rod is formed on the opposite side of each divided body, After that, at least the worm wheel is loaded and faced, and the peripheral surface of the joint surface is welded and integrated, whereby it is easy to manufacture a columnar receiver that exerts a tightening force by the worm gear mechanism.

A wheel-integrated columnar receiver in which a worm wheel forming an internal thread portion is installed, a pull rod having an external thread portion threadedly engaged with the internal thread portion, and a male thread portion formed at the other end. Provide a sleeve body, a connecting rod having a male screw portion screwed from the opposite side of the screw hole of the sleeve body, and another columnar receiving member having a female screw portion to which the other end of the connecting rod is screwed. For example, the worm wheel can be rotated to screw the pull rod to the sleeve body, and the connecting rod can be strongly screwed to the other columnar receiving member 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 double pulling and fastening can be performed at a position where the joining operation cannot be performed on the axis.

If a collar-shaped portion is provided on the sleeve body so that the collar-shaped portion can contact the second structural member when the pull rod is rotated by the worm through the worm wheel, the collar-shaped portion The other columnar receiving member can improve the tightly bound state of the first structural material and the second structural material.

A right-hand thread is given to the female thread portion of the worm wheel, and the direction of the worm's spiral winding is set so that the worm wheel rotates counterclockwise as the worm wheel rotates clockwise when viewed from the screw rod insertion side. If the male threads formed on both ends of the rod and connecting rod are left-hand threads,
By the right rotation operation of the rotational force transmission rod, the tightening operation of the metal fitting of the double-pull structure is achieved as a series of movements.

[0040]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a screw-type connector for a building structure material according to the present invention will be described in detail with reference to the drawings showing an embodiment thereof. FIG. 1 is a perspective view showing a main part of a screw-type connecting tool 1 for a building structure material capable of tightly connecting the wooden structure materials, which are objects to be joined, and their respective rotation directions.

This metal fitting is provided in a cylindrical receiving member 2 made of metal, hard plastic, or the like which is buried so as to cross in the vicinity of the joint of the structural material, and in the longitudinal middle portion of the cylindrical receiving member. The internal thread portion is provided with a pull rod 3 screwed through another structural material (object to be joined), and exerts a tightening force on the opposing structural material via a retaining portion (not shown) at the other end of the pull rod. It was made possible.

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 receiving member 2. The worm wheel 4 is internally rotatably mounted in a substantially central portion of the cylindrical receiving member 2 in the longitudinal direction, and a female screw portion 4f into which the pull rod 3 is screwed is formed in the central portion thereof.

As shown in FIG. 2 (a), the wheel-installed cylindrical receiver 2 is provided with a fitting hole 2h which is substantially concentric with the axis of the female screw portion 4f, and the male screw portion of the pull rod 3 is provided. 3a and the shaft portion 3s near the base portion thereof can be inserted. In the figure, the fitting hole 2h is a transverse hole penetrating the cylindrical receiving member 2 in the diameter direction, and is slightly larger than the outer diameter of the male screw portion 3a.

The worm 5 meshed with the outer peripheral portion of the worm wheel 4 is integrated with the rotational force transmission rod 7 as shown in FIG. 3 (a), and is a wheel-integrated cylindrical receiver shown in FIG. Rotational force transmission rod 7 inserted from the end face 2e of 2
Can be turned by. The insertion opening 2t for that purpose is opened obliquely as can be seen from FIG. 4, and the rotational force transmission rod 7 is inserted at an intersecting angle α with respect to the axis 2a of the cylindrical receiver 2 as shown in FIG. . By the way, the angle should be selected each time the diameter of the cylindrical support 2 and the worm wheel 4 are selected.
It may be determined in consideration of the main dimensions such as the diameter of.

Of course, the worm 5 is arranged in a posture having the same intersection angle as the rotational force transmitting rod 7 and is meshed with the worm wheel 4, but the worm 5 can be pulled out after the rotational force transmitting rod 7 is slightly reversed. For example, it can be taken out from the cylindrical receiving member 2. Therefore, only the worm wheel 4 is left on the columnar receiving member 2 after the binding operation, and the worm wheel can be used to rotate the worm wheel of the columnar receiving member embedded in another place thereafter. .

Whether or not the rotational force transmission rod is integrated with the worm 5 or separate from the worm 20 as shown in FIG. 8 described later, if such a worm gear mechanism 6 is adopted, As will be described in detail later, by rotating the worm 5, the male screw portion 3a previously meshed with the female screw portion 4f shown in FIG. 1 is rotated in the direction of the arrow 8 so that the worm wheel 4 is strongly screwed together to form a large joint. It becomes possible to generate a force or to apply a rotating force in the direction of arrow 9 to the tension rod 3 that is tightly screwed. still,
The female screw portion 4f is formed in a right-hand thread, while the worm wheel 4 rotates the worm 5 to the right by the arrow 10 to rotate the pull rod 3f.
The direction of the spiral winding of the worm 5 is set so as to rotate counterclockwise (arrow 8) when viewed from the screwing side.

By the way, as shown in FIG. 5, in the wheel-internal type cylindrical receiver 2, the worm 5 is allowed to rotate and is prevented from advancing in a recessed portion where the worm 5 is arranged. A bearing portion 11 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, a recess is provided that regulates the axial displacement of the worm 5 that is rotationally operated freely and also exerts a bearing function of suppressing rotational shake. for that reason,
At the rear end of the worm 5, as shown in FIG.
Is formed, and the needle bearing mechanism is used to ensure stable rotation.

If the binding member for the structural material is constructed as described above, the fastening force can be easily generated as described below. First, the case of application to the portion A of FIG. 7 will be described. In this case, the pull rod 3 is provided with a male screw portion 3a which is screwed with the cylindrical receiving member 2 at one end thereof and a retaining portion 3k at the other end thereof. The wheel-installed cylindrical receiver 2 is embedded so as to traverse in the vicinity of the joint of the diagonal member 12 so that the axis of the worm wheel 4 installed therein is vertical.

The head 3h and the washer 3w, which form the retaining portion, are inserted into the beam 13 in a posture in which they are positioned above,
The male screw portion 3a of the pull rod 3 is lightly engaged with the female screw portion of the worm wheel 4. If a shallow groove 2g that is perpendicular to or parallel to the axis of the worm wheel 4 shown in FIG. 1 is formed on the other end surface of the cylindrical receiver 2, the internal thread in the case of FIG. The opening posture can be corrected by knowing the opening direction of the part and inserting the thin iron piece and rotating.

Next, as shown in FIG. 5, the rotational force transmitting rod 7 is inserted into the column-shaped receiving member 2 and turned lightly to engage the worm 5 at the tip with the worm wheel 4. An operator is located in the front space of the paper surface of FIG. 7, grips the chucked portion 14 of FIG. 5 with an electric tool, and rotates it in the direction of arrow 10. Although the worm 5 is operated freely, the shaft bearing 11 prevents the worm 5 from advancing in the axial direction and secures stable rotation of the worm 5, so that the female screw portion 4f of the worm wheel 4 is secured.
The threaded engagement between the male thread portion 3a of the pull rod 3 and the male thread portion 3a proceeds smoothly.

When the rotational force transmission rod 7 is rotated until a desired torque is generated, the male screw portion 3a of the pull rod 3 is drawn into the cylindrical receiving member 2 by the rotation of the worm wheel 4.
A desired axial force can be applied to the pull rod 3. Since the tightening force is generated through the pullout rod retaining portion 3k,
The diagonal member 12 and the horizontal member (beam) 13 are tightly connected.

By the way, as shown in FIG. 9, the rotational force transmission rod 7 may be inserted from the end face 2e in parallel with the axis 2a of the cylindrical receiving member 2, but as shown in FIG. If so, the worm gear mechanism 6 and the rotational force transmission rod 7
Can be compactly stored in the cylindrical receiver 2. Not only that, since the rotational force transmission rod 7 is in a posture that extends off the axis of the cylindrical receiving member 2, an electric tool (not shown) for rotating the rotational force transmission rod may interfere with a structural material located nearby. The number can be reduced and the operability for tightening is often improved.

Needless to say, the rotational force transmission rod 7 can be rotated via the hexagonal wrench hole 14a as shown in FIG. Further, the receiving tool 2 is not limited to a columnar shape, and may have a polygonal cross-section or the like. In short, the receiving tool 2 can be embedded by being inserted into a structural material, and it is desired to avoid unnecessary stress concentration. A columnar body that can receive a large bonding force may be used.

Further, a fitting hole 2h provided in the column-shaped receiving member
(See (a) of FIG. 2) may be a transverse hole as described above, or may be a bag-shaped hole 2n only enough to insert the male screw portion 3a as shown in (b) of FIG. However, if the cross hole is used, the male screw portion 3a can be screwed into the worm wheel 4 even when the columnar receiving member 2 of FIG. It is also possible to reverse the inclination of the rotating force transmission rods 7 shown in FIG. Therefore, depending on how deep the neighboring structural materials are,
There is room for selection in the setting of the rotational force transmission rod 7, and the convenience is enhanced as described above.

Incidentally, the column-shaped receiving member 2 of the worm wheel 4
The interior of the column will be described later, but in order to smooth the rotation and suppress the friction when the rotational force is transmitted from the worm 5, a lubricant such as grease has been injected into the columnar holder, or the worm 5 The grease may be attached and then inserted.

Returning to FIG. 7, the case of application to the portions B and C will be briefly described below. In the portion B, the pull rod 3 is an anchor bolt, the lower end bent in a U shape functions as a retaining portion, and the shaft portion extends upward through the base 15. In this case, the pillar 16 in which the wheel-inner type columnar receiving member 2 is embedded in advance is lowered, the shaft portion of the anchor bolt is inserted, and when the columnar receiving member 2 is reached, a rotational force transmission rod (not shown) is turned to rotate the male screw at the tip. The part can be screwed into the female thread of the worm wheel and tightened.

In the portion C, the retaining portion of the pull rod is the screw hole engraving type column receiver 17 introduced in Japanese Patent Laid-Open No. 9-60124, and the male screw portion 3c formed at the other end of the pull rod 3.
Is previously screwed into the columnar receiving member 17 embedded in the diagonal member 18. A slant member 12 in which a pull rod 3 protruding leftward from a slant member 18 is passed through a pillar 16 and a wheel-inner type columnar receiving member 2 is embedded therein.
Insert the shank to the left from the pillar 16. When the worm wheel is rotated by the rotational force transmission rod in the columnar receiving member 2, the female screw portion 4f pulls in the pull rod 3 and screwing proceeds.

When the screwing reaches the meshing end, the pull rod 3 is rotated to the right by the female screw portion 4f which continues to rotate in the columnar receiving member 2, and the pull rod 3 is a screw element which is another screw element. The built-up columnar bracket 17 is rotated clockwise and is strongly screwed.
It should be noted that it is possible to use a wheel-inner type columnar receiver in place of the screw hole engraved columnar receiver 17 on the side of the diagonal member 18, but the screw hole engraved columnar receiver is cheaper. To be
At the time of the final fastening operation from the columnar receiving member 2, it is still necessary to prevent the rotation of the worm wheel of the wheel-internal type columnar receiving member. Therefore, the screw hole engraving type columnar receiving member is often sufficient.

As can be seen from the above operation, since the worm gear mechanism is interposed in the columnar receiving member, a large torque is generated in the worm wheel with a small torque peculiar to the worm gear, so that the worm wheel has a male screw portion. A large joining force can be generated through the engagement of the. Although the worm needs a large number of rotations, screwing can be completed in an extremely short time of about 1 second by rotating the worm with an electric 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.

Since the worm for rotating the worm wheel is operated from the end face side of the column-shaped receiving member, the operating space is not required on the axially extending side of the pull rod, and even if it is a pulling operation, it does not require the binding metal fitting. Applicability is significantly improved. Of course,
Since the structural material, which is the article to be joined, does not have a large cross-section loss, and the binding metal member itself does not have a cross-section loss part, the metal fitting can be downsized and the weight can be reduced easily.

In the above example, the female screw portion provided on the worm wheel with which the pull rod is screwed is set to the right-hand thread, and the worm wheel is rotated counterclockwise when the worm is rotated rightward as viewed from the side where the pull rod is screwed. Since the direction of the worm's helical winding is set to, when the worm is turned and the worm wheel is rotated, the female screw part and the pull rod are slightly meshed, or the tip of the male screw part is If it is dropped into the entrance, the rotation of the worm after that becomes a self-tightening action that promotes screwing.

FIG. 3 (a) 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 binding metal fitting is also reduced, and an inexpensive metal fitting is provided. Is possible. However, not limited to this, as shown in FIG. 8, an engaging claw 19a such as a Phillips screwdriver is formed at the tip of the rotational force transmitting rod 19, and the engaging groove 20 is formed at the base of the worm 20.
It is also possible to provide a.

Worm wheel 4 as well as worm 2
Although 0 is also left in the columnar receiver 2, the worm can be turned remotely by grasping the outer end of the rotational force transmission rod 19 and rotating it in the end space of the wheel-inner type columnar receiver. There is no change in what you can do.

If the outline of the storage space 2s of the worm 5 is matched with the outline of the worm 20 as shown in the figure, the worm 2
Since the axial displacement of 0 is less likely to occur, the pushing force against the rotational force transmitting rod 19 during rotation can be reduced. On the other hand, only by pulling, the rotational force transmission rod 19 can be taken out, and therefore only the rotational force transmission rod can be reused as a tool, but it greatly contributes to the efficiency of the binding work.

Although the parts A to C in FIG. 7 are not drawn as if the tenon was provided in the joint, there is no particular problem in forming the tenon. When the tenon is provided, the pull rod may be arranged so as to penetrate the tenon. However, since the binding force is greatly exerted by the binding metal fitting, the tenon formation can be omitted in many cases. Further, since it becomes easy to dispose the pull rod on the axis of the structural material, it is possible to easily realize such disposition in the portion B of FIG. 7 and the portion D described later in the example described above. it can.

As a result, the distribution of the force in the joint is made uniform, and it is possible to prevent the biased force from being applied. The binding metal fittings are mainly applied to wooden building structural materials, but structural materials made of other materials can also be applied as long as they are structural materials capable of embedding the columnar receiver. The size thereof may be appropriately selected according to the cross-sectional area and cross-sectional shape of the structural material to which it is applied.

By the way, as shown in FIG.
As enlargedly shown in (a), an arcuate recess 4a into which a part of the worm 5 is fitted is formed in the center of the worm wheel 4 in the tooth width direction. By doing so, the contact area between the tooth surface 5t of the spirally wound worm and the tooth surface 4t of the worm wheel becomes larger than that in the case without the depression shown in FIG. 10B (the thick hatched portion). Torque transmission in the worm gear mechanism is facilitated.

Further, the distance La between the axis 5s of the worm and the axis 4s of the worm wheel can be made shorter than Lb in the case of (b), so that the storage space which must be secured in the wheel-inner type columnar receiver. Narrowed down,
It can also contribute to downsizing of the binding hardware.

The above description has described the operation of joining the structural members using the binding metal fittings. By the way, there is almost no case where the structural material once joined is removed during construction of the building, but it cannot be said that there is no need to press the need. Therefore, an operation of reversing the worm wheel by the above-mentioned worm gear mechanism and releasing the male screw portion of the pull rod from the female screw portion of the worm wheel will be described below.

Now, the state where the male screw portion is strongly screwed to the female screw portion means that the male screw portion is screwed to the female screw portion up to the thread forming end, and the axial force is applied to the pull rod. Means working. This axial force favorably draws the pull rod to the worm wheel, but the reaction force is received by the pull rod side wall 25w of the wheel storage space 25 of the worm wheel 4 shown in FIG. 2 (a). .

Therefore, if the worm 5 is to be rotated in the opposite manner to the case of FIG. 1, it is necessary to overcome the friction on the contact surface. However, when the worm 5 is rotated in the reverse direction, as can be imagined from FIG. 5, the movement of the worm wheel 4, which does not rotate easily, guided by the tooth surface of the worm wheel 4 causes the worm 5 to slip out, and as shown in FIG. The male screw portion 3a cannot be released from the female screw portion 4f.

Therefore, in the present invention, a stopper body 21 as shown in FIG. 11 is prepared to prevent 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 the state of facing the rotational force transmission rod 7, and the middle portion 21 shows the state of being fitted into the rotational force transmission rod 7.

In the case of this example, the insertion hole 2t is formed with a screw hole portion 23 into which a hollow stopper body 21 for preventing the retraction of the rotational force transmission rod 7 is screwed. On the other hand, the stopper body 21 has a vertical through hole 21a into which a part of the shaft of the rotational force transmission rod 7 is fitted, and also a stopper portion 21s that abuts on a step 7p provided in the middle body portion of the rotational force transmission rod 7. Prepare

The stopper portion 21s is formed at the tip of the male screw portion 21m that is screwed into the screw hole portion 23. Therefore, if the male screw portion 21m is screwed to the screw hole portion 23 as much as possible, the rotational force transmission in the state of being fully inserted is achieved. It can be brought into contact with the step 7p of the rod 7. 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 on the rotational force transmission rod 7 and the like are determined so as to be suitable for a desired operation.

Incidentally, a grip 21g as shown in the drawing is provided as an operating portion for screwing the stopper body 21, the surface is knurled, or a twisting handle 21h shown by a virtual line is provided. If this is done, the screwing operation becomes easy. If this operation part is not provided,
If a groove as indicated by 2g in FIG. 1 is provided at the rear end of the male screw portion 21m, the thin iron piece can be hooked and rotated to easily screw it into the screw hole portion 23. it can.
On the other hand, if the operation portion is provided, it is possible to form a step 21p at its tip as shown in FIG. 11 and bring it into contact with a seat surface 2z provided near the entrance of the insertion opening 2t.

Also by this, the return of the rotational force transmitting rod 7 is prevented by the stopper portion 21s at the tip of the step 7p provided in the middle body portion of the rotational force transmitting rod 7 and the male screw portion 21m of the stopper body 21.
It is achieved by contact with. In any case, the screw formed in the screw hole portion 23 into which the stopper body is screwed is, as shown in FIG. 1, a female screw portion 4f of the worm wheel 4.
When the male screw part 3a of the pull rod 3 is screwed onto the worm 5,
If it is rotated to the right, it will be left-handed.

With this arrangement, when the torque transmission rod 7 is rotated in the reverse direction (counterclockwise rotation: arrow 22), the stopper body 21 is rotated.
Does not come out of the screw hole portion 23 due to its rotation. If the stopper body 21 prevents the rotational force transmission rod 7 from retreating at the time of reverse rotation, it prevents the worm 5 and the worm wheel 4 from disengaging and the worm 5 stably reverses the worm wheel 4. Then, the male screw portion 3a of the pull rod 3 can be released from the female screw portion 4f. Incidentally, in the example of FIG.
Since it is in a state where it can hardly be displaced in the axial direction,
It is not necessary to prepare a stopper body or provide a screw hole portion.

Next, a columnar bracket capable of incorporating 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 pillar-shaped receiving member 2, but the hatched portion will be considered as a divided surface divided along the longitudinal direction for explanation.

On the split surface of each split body, a storage recess 25 having a circular contour that slightly exceeds the half thickness of the worm wheel, and a worm and a rotational force transmission rod for fitting the half thickness so as to be continuous with the storage recess 25. Insertion / removal recess 26, bearing half recess 27 for forming bearing part 11 at the tip thereof
Is carved. Then, 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 in the corresponding storage recesses of one of the divided bodies, and the other divided bodies are combined into a columnar shape. return.

Appropriate welding may be applied to the peripheral surfaces of the mating surfaces in a state where they are in close contact with each other, and the welded portions may be shaped by sanding or the like so that unnecessary protrusions do not remain. By doing so, it is possible to leave the worm gear mechanism in the form of a pillar-shaped receiving member, and to secure its stable movement and to exert a desired tightening force.

FIG. 12 shows an example of a divided body product obtained by forging an ingot in a mold. In addition to the required dents 25, 26, 27, a dent 28 is also provided for dropping the mess to reduce the weight if necessary. Small protrusions 29, 29 are provided on one mating surface, and small recesses 30, 30 are formed at the corresponding positions on the other surface. When these are fitted as shown in FIGS. 13B and 13C, the accommodation recesses 25, 26, 27 naturally have a completely desired shape as the accommodation space.

Since several chamfered portions 31 are provided on the edge portion as shown in FIG. 12, the chamfered portion can be used as a welding groove when performing the welding 32 as shown in FIG.
The screw hole portion 23 for screwing the stopper body is shown by an imaginary line in FIG. 12, but this is provided by processing after being integrated into a cylindrical shape by welding. In this way, if it is a forged product, mass production will be easy and cost reduction will be easy.

By the way, although the worm 5 is designed to stabilize its rotation by the substantially sharpened portion 5a (see FIG. 5), it is replaced with the tool 33 shown in FIG. 3 (a) (b).
Alternatively, the tool 34 shown in FIG.
This is because the tip 5p of the worm 5 is substantially flat, so that the contact surface 2b as shown in FIG.

In this case, if all of the tooth tips of the worm 5 cannot be accommodated in the columnar receiving member 2, a part of them may be deliberately seen as shown in the drawing. The peeping portion 35 is as if the surface of the column-shaped receiving member is torn, but this does not cause any trouble in applying a binding force to the structural material. If the structural material is wood or the like, the worm that peeped out cuts the structural material, but this is not a problem.

The above has described the case of the one-sided structure. Next, the pulling structure will be described. Referring to FIG. 2A, in this case, the wheel-inner type columnar receiving member 2 described above,
A pull rod 3 having at one end a male screw portion 3a screwed into the female screw portion 4f, a sleeve body 41 screwed to a male screw portion 3b formed at the other end, and a screw hole 41a of the sleeve body.
A connecting rod 42 having a male screw portion 42a screwed into a screw hole 41b on the opposite side to the other rod-shaped receiving member 17 having a female screw portion 17f to which the male screw portion 42b at the other end of the connecting rod is screwed. To be done. In this example, the pull rod 3, the sleeve body 41, and the connecting rod 42 correspond to the pull rod, and the columnar holder 17
Corresponds to the retaining portion.

Incidentally, as a representative example of the male screw, the male screw portions 3a, 3b, 42a, 42b are all right-handed screws. Incidentally, the columnar receiving member 17 may be the screw hole engraving type columnar receiving member described in the section of the prior art, or may be the wheel built-in type columnar receiving member. In any case, it is preferable that the male screw portion 42b is penetrated so that the screwing can be completed completely. There is no problem as long as a structural material is adopted, which can be scraped by protruding the tip of the male screw from the columnar receiver. Of course, if there is a problem with the protrusion of the screw, dimensional consideration may be given so that the tip of the male screw portion remains in the column-shaped receiver.

The binding fitting made of such a member is shown in FIG.
It is applied to the D part of. First, the other rod-shaped receiving member, which is a screw hole engraving type columnar receiving member 17, is embedded in the beam 13 which is the first structural member shown in FIG. 15 and is inserted into the beam 13.
Is screwed onto the female threaded portion 17f of the column-shaped receiving member 17. Beam 13
The part that could not be fully accommodated in
After being inserted in 6, 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 has a kerf 4 extending left and right in the figure.
1 g is provided, and it may be rotated by, for example, hanging a thin iron piece 43 shown in phantom in FIG.

On the other hand, in the beam 36 (see FIG. 16) which is the third structural member, the wheel-inner type columnar receiving member 2 is embedded so as to traverse in the vicinity of its joint, and extends through the beam 36 so as to extend into the worm wheel 4. The male screw portion 3a of the pull rod 3 reaching the female screw portion 4f is previously screwed to the screw end. The screwing with the female screw portion 17f of the screw hole engraving type columnar receiving member 17 and the screwing with the male screw portion 42a of the sleeve body 41 may be a temporary meshing. In the wheel-internal type columnar receiving member 2, although the male screw portion 3a is screwed up to the screw end, it may be a little insufficient.

Carrying the beam 36, the male screw portion 3b of the pull rod 3
To the screw hole 41a of the sleeve body 41. Pull rod 3
When alignment is achieved by, for example, slightly engaging the tip of the sleeve body 41 with the sleeve body 41, the tool 33 or 34 (see FIG. 3) is inserted into the wheel-internal type columnar receiver 2 and rotated right by an electric tool. Rotate the worm wheel 4 counterclockwise and pull the rod 3
The male screw portion 3a is fully screwed into the female screw portion 4f as in the state of FIG. In this case, the worm wheel 4 and the pull rod 3 are integrated with each other, so that the pull rod 3 tightly screwed with the pull rod 3 is given a rotational force thereafter.

The pull rod 3 has a sleeve body 4 as shown in FIG.
Since it is rotated rightward with respect to 1 (see arrow 9), the male screw portion 3b advances the screwing engagement 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 rotating rightward. When the connecting rod 42 (see FIG. 2A) is screwed to the male screw portion 42a and the male screw portion 42a is screwed to the screw end of the screw hole 41b, the connecting rod 42 starts rotating to the right.

As a result, the male screw portion 42b of the connecting rod advances the screwing with the female screw portion 17f of the threaded hole type columnar bracket 17. When the worm 5 is rotated until a predetermined torque is generated, as shown in FIG. 7, the wheel-internal type cylindrical receiver 2 and the screw hole engraving type cylindrical receiver 17 become the pull rod 3, the sleeve body 41. , Is attracted by the connecting rod 42. As a result, the through column 16 is strongly sandwiched by the beams 13 and 36, and the fastening operation is realized even though it is a place where the joining operation is normally impossible.

By the way, as shown in FIG.
When a pull rod 3 is rotated by the worm 5 via the worm wheel 4, a collar-shaped portion 41f is provided in a part of, for example, substantially the center, and the collar-shaped portion 41f moves through the pillar 1 as shown in FIG.
6 (see the enlarged portion in the figure) so that the collar 13 and the screw hole engraving type column receiver 17 strengthen the tight connection between the beam 13 and the through column 16. You can

The screw engagement in the sleeve body 41 is made up to the screw inner ends of the screw holes 41a and 41b in FIG. 2A, instead of the male screw portion 3 as shown in FIG.
It may be up to the screw ends of b and 42a, or may be up to the male screw portion 3b hitting the male screw portion 42a as shown in (c). Although it is not necessary to provide the tenon, it is also possible to provide the tenon 45 and the tenon hole 46 in both the pulling and to allow the tenon to penetrate therethrough.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of a screw joint for building structural material according to the present invention.

FIG. 2 is a cross-sectional view in the case of a double-pull structure and a threaded state view of each male screw portion in the sleeve body.

FIG. 3 is a configuration diagram of a worm when the tool is integrated with a rotational force transmission rod.

FIG. 4 is an external view of a metal fitting having a double-pull structure.

FIG. 5 is a cross-sectional view showing a state in which a worm gear mechanism is incorporated in a columnar receiver.

FIG. 6 is a configuration diagram of the columnar receiving member with the worm gear mechanism removed.

FIG. 7 shows an example of application to a structural material.

FIG. 8 is a cross-sectional view in which a worm that is a separate body from the rotational force transmission rod is applied to the columnar receiving member.

FIG. 9 is a cross-sectional view of a case where a worm is installed so as to be parallel to the axis of the columnar receiver.

FIG. 10 is an explanation of meshing between a worm and a worm wheel, and (a) is a cross-sectional view of a case where the teeth of the worm wheel have an arcuate recess into which a part of the worm fits at the center in the tooth width direction, b) is a cross-sectional view when there is no recess.

FIG. 11 is a cross-sectional view of a column-shaped receiving member that enables a worm wheel to reversely rotate using a stopper body.

FIG. 12 is a configuration diagram of each divided body when the columnar receiver has a split structure.

FIG. 13 is an external view of a case where the divided bodies are combined to form a columnar receiving member.

FIG. 14 is a cross-sectional view of a worm that does not have a sharp bearing.

FIG. 15 is an operation explanatory view showing a state in which metal fittings are incorporated into a structural material and the structural material is assembled.

FIG. 16 is an explanatory diagram of work following FIG. 15.

FIG. 17 shows an example of application of a conventional binding member to a structural material.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Screw-type joint for building structural materials, 2 ... Columnar receiving member (wheel internal type columnar receiving member), 2a ... Axis line, 2e ... End surface, 2h
... insertion hole, 2n ... bag-like hole, 2s ... storage space, 2t ... insertion port, 3 ... pull rod, 3a-3c ... male screw part, 3k ... retaining part, 4 ... worm wheel, 4a ... arc-shaped recess, 4f
... Female screw portion, 4t ... Worm wheel tooth surface, 5 ... Worm, 5a ... Substantially sharpened portion, 7 ... Rotational force transmission rod, 11 ... Bearing portion, 17 ... Screw hole engraving type column receiver, 19 ... Rotational force transmission Rod, 20 ... Worm, 21 ... Stopper body, 25 ... Storage recess (accommodation recess, wheel storage space), 26 ... Insertion / removal recess (accommodation recess), 27 ... Bearing recess (accommodation recess), 41
... sleeve body, 41a, 41b ... screw hole, 41f ... collar part, 42 ... connecting rod, 42a, 42b ... male screw part.

Claims (12)

[Claims] 1. A columnar receiving member is embedded in a building structure material so as to traverse it in the vicinity of a joint, and one end of a pull rod extending through another structural member in an internal thread portion arranged in the longitudinal middle portion of the columnar receiving member. In the fixing tool for building structure material joining, which is capable of tightly connecting the structural materials, by applying a tightening force through the retaining portion at the other end of the pull rod, The tool is formed with a fitting hole into which the male screw portion of the pull rod can be inserted, and the female screw portion is internally rotatably mounted in the columnar receiving member about an axis matching the axis of the fitting hole. Formed in the center of the worm wheel, the outer periphery of the worm wheel meshes with the worm rotated by the rotational force transmission rod inserted from the end face of the columnar receiving member, and the female screw portion is previously meshed with the worm. The male threaded portion to the worm Screwing tool for building structural material, which can be strongly screwed to generate a large joining force by rotation of the rod, or can be given a rotating force to the pull rod that is tightly screwed. . 2. The internal thread portion is formed in a right-hand thread, and the worm wheel is set to rotate counterclockwise when viewed from the side where the pull rod is screwed in, when the worm wheel rotates clockwise. 1. A screw-type connector for building structure materials described in 1. 3. The building structure material according to claim 1, wherein an arcuate recess into which a part of the worm is fitted is formed at the center of the worm wheel in the tooth width direction. Screw-type connector. 4. The worm is integral with the rotational force transmission rod, and can be taken out from the column-shaped receiving member of the wheel interior type after the operation of joining the structural members. The screw-type connector for building structure material according to any one of 3 above. 5. The rotational force transmission rod is inserted from the end face in a direction intersecting the axis of the wheel-inner type columnar receiving member, and the worm is also arranged in a posture having the same crossing angle to engage with the worm wheel. The screw-type connector for a building structure material according to claim 1, wherein the screw-type connector is used. 6. A bearing portion, which allows the worm to rotate but prevents it from advancing, is formed at a location where the worm of the wheel-inner type columnar receiver is arranged. The threaded connector for a building structure material according to any one of claims 1 to 5. 7. A screw hole portion for screwing a stopper body for preventing the retreat of the rotational force transmission rod is formed at an insertion opening of the rotational force transmission rod of the wheel-internal type columnar receiving member. The screw-type connector for a building structure according to claim 6. 8. The screw formed in the screw hole for screwing the stopper body is a left screw when the worm is rotated to the right during a joining operation. Item 7. A screw-type connector for building structural materials according to item 7. 9. The wheel-integrated columnar receiver has a divided structure that is divided into two along the longitudinal direction, and a recess for accommodating the worm wheel, the worm, and the rotational force transmission rod is provided on the mating surface side of each divided body. 9. The columnar receiver is formed integrally with at least one worm wheel, and is welded to the peripheral surfaces of the mating surfaces with the worm wheel facing each other, whereby the columnar receiver is integrated. The screw-type connector for building structure materials as described in 1 above. 10. A wheel-installed columnar receiver, in which a worm wheel having a female screw portion formed in the central portion according to claim 1 is internally mounted, and a puller provided at one end thereof with a male screw portion screwed into the female screw portion. A rod, a sleeve body screwed to a male screw portion formed on the other end of the pull rod, 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. Another columnar receiving member to be screwed together, the other columnar receiving member is embedded in the first structural member so as to traverse in the vicinity of the joint, and the connecting rod inserted into the first structural member is connected to the columnar receiving member. After being screwed into the tool, the portion that did not enter the first structural material is inserted into the second structural material, and the sleeve body is screwed to the male screw portion at the tip of the second structural material. Are embedded in the third structural material so that they cross in the vicinity of the joint and extend through the third structural material A pull rod previously screwed into the female thread of the worm wheel is screwed onto the sleeve body by the rotation of the worm wheel, and the connecting rod is received by the other columnar support by the rotation of the sleeve body caused by continuing the rotation of the worm wheel. It is characterized in that the operation of tightly screwing the tool into the tool and tightly binding the second structural material by sandwiching it between the first structural material and the third structural material is made possible by the rotation of the rotational force transmission rod. A screw type joint for building structural materials. 11. A collar-shaped portion is provided on the sleeve body, and the collar-shaped portion is arranged so that the collar-shaped portion can contact the second structural member when the worm wheel is rotated by the worm. The screw-type joint for a building structure material according to claim 10, characterized in that a tightness state of the first structural material and the second structural material can be improved by the and the other columnar receiving member. Ingredient 12. The female screw portion is formed to have a right-hand thread, and the worm wheel is set to rotate counterclockwise when the worm is rotated rightward as viewed from the side where the pull rod is screwed in. Each of the pull rod and the connecting rod. The male screw portions formed at both ends of the screw are right-handed screws, and the threaded connector for a building structure material according to claim 10 or 11.