JP6585320B1 - Scaffold tethering device - Google Patents

Abstract

The present invention aims to ensure the rotational drive of a drill screw in a scaffold tethering device that can easily assemble a scaffold and reduce the labor of building construction. A scaffold connecting device includes a drill screw, a first nut, a second nut, and a connecting bolt. The drill screw 1 includes a flange 8 and an outward male screw portion 7, and the first nut 2 is screwed into the outward male screw portion 7. The second nut 3 is connected to the first nut 2 by a connecting bolt 4 so as to be assembled. An engagement protrusion 18 is formed at the tip of the connection bolt 4, and an engagement hole 19 is formed in the end surface of the outward male screw portion 7. Since the connecting bolt 4 serves as a wrench, the drill screw 1 can be reliably rotated. [Selection] Figure 1

Description

  The present invention relates to a scaffold connecting device used for assembling a scaffold to be installed when constructing a steel-type building or the like.

  When constructing a steel type building or the like, a scaffold is assembled so as to surround the building, and this scaffold is fixed to the building via a scaffolding connecting device so as not to fall down. As an example of this scaffolding device, Patent Literature 1 discloses a metal fitting made of a drill screw and a long nut (high nut).

  That is, the metal fitting of patent document 1 forms the cylindrical part which holds the head of a drill screw in the one end part of the long nut into which the connection shaft body (scaffold tether) connected with the scaffold is screwed, It is connected to the head of the drill screw so as to be able to swing, and the shaft center of the long nut can be arbitrarily changed within a certain range with respect to the shaft center of the drill screw. Even if the shaft center is shifted, the connecting shaft body and the long nut can be connected.

  On the other hand, in Patent Document 2 relating to the application of the present applicant, a drill screw and first and second nuts (intermediate member and joint member) are arranged in series, and the first nut (intermediate member) is a drill. The second nut (joint member) is swingably connected to one nut by a bolt inserted inside, and the joint fitting is fixed to the other nut with a bolt. A metal fitting is disclosed.

  In this Patent Document 2, the drill screw has a flange that overlaps the surface of the building, and by forming a cam that meshes with each other on the opposing surface of the first nut and the flange, The rotational torque of the first nut can be transmitted to the drill screw while preventing biting.

Japanese Patent No. 2764232 Japanese Patent No. 6485930

  In buildings where this type of metal fittings are used, wall materials such as ALC plates and heat insulation panels are fixed to structural materials made of angle C-shaped steel, etc., and the drill screw of Patent Document 1 is a wall such as an ALC plate. It penetrates the material and is screwed into the structural material.

  And in patent document 1, since the head of the drill screw is held at one end of the long nut, in order to remove the long nut, it is necessary to unscrew the drill screw with a wrench and remove it from the building. After removing the drill screw set with the long nut, another fixing drill screw is screwed back into the same location to fix the wall material. For this reason, two steps, a step of removing the drill screw for connecting the scaffolding and a step of screwing another drill screw into the same location, are necessary, and there is a problem that it takes time to construct the building.

  On the other hand, in Patent Document 2, since the drill screw remains in the building, it is possible to fix the wall material or the like to the structural material with the drill screw, and therefore, it is possible to reduce the labor of building construction. Moreover, since the operation | work which fixes a wall material to a structural material in the state which cancel | released the connection by a scaffolding apparatus is unnecessary, a worker's safety can also be improved.

  As described above, the scaffolding device of Patent Document 2 has an excellent effect. However, as a result of examination by the inventor of the present application, it has been found that there is room for improvement in terms of the certainty of the rotation operation of the drill screw.

  That is, in Patent Document 2, biting of the first nut against the outward male screw portion of the drill screw is prevented by forming end face cams that mesh with each other on the opposing surface of the first nut and the flange of the drill screw. However, due to processing errors, there was a possibility that the cams would not be engaged with each other and could be twisted and twisted.

  The present invention has been made against this background, and as in Patent Document 2, the self-drilling screw such as a drill screw and two nuts are used, and the rotation operation of the self-drilling screw is ensured. An object of the present invention is to provide a scaffolding device that can be used.

The scaffold connecting device of the present invention is
“A self-drilling screw that is screwed into a building without drilling a pilot hole, and a first nut and a second nut arranged in series with the self-drilling screw,
While the self-drilling screw forms an outward male screw portion into which the first nut is screwed,
A connecting bolt having a shaft portion screwed into the first nut and a head with an engagement hole is inserted into the second nut, and the head of the connecting bolt is held in the second nut so as not to be detached. The second nut is connected to the first nut so as to freely swing,
The connection bolt can be rotationally driven by a wrench inserted through the second nut, and a joint fitting constituting a scaffold can be fastened to the second nut with a bolt. ''
In the basic configuration
“An engagement means that engages with each other by an axial fit and becomes incapable of relative rotation is formed on the outward male thread portion of the self-piercing screw and the tip of the connecting bolt.”
The structure is added.

  Self-drilling screws can be used in various structures, such as drill screws, tapping screws, and wood-threaded screws with sharp tips (scissors), and can be selected according to the type of components that make up the building I should do it. That is, for example, the type may be selected in accordance with the material of the mating member, such as using a drill screw when screwing into a steel frame and using a scissor cutting screw when screwing into an ALC or a panel material.

The engagement means can adopt various configurations.
“The engaging means comprises an engaging protrusion protruding from the tip of the connecting bolt and an engaging hole formed in the outward male screw portion of the self-drilling screw.”
The configuration is adopted.

  Various forms such as hexagons, squares, squares such as stars, crosses, and three-points can be adopted as the form of the engagement protrusions and engagement holes. Although a minus shape (sleeve shape) can also be adopted, it can be said that it is included in a rectangular quadrilateral.

  In the present invention, a self-drilling screw such as a drill screw is screwed into a building structural material or the like via a connecting bolt, but the connecting bolt and the self-drilling screw are engaged with each other so as not to rotate relative to each other by axial fitting. Therefore, when the connecting bolt is rotated with a wrench, the self-drilling screw is rotated by the connecting bolt. Accordingly, the self-drilling screw can be driven to rotate in the same state as when it is rotated with a wrench.

  Therefore, there is no occurrence of a biting phenomenon between the connecting bolt and the self-drilling screw. As a result, the self-drilling screw can be driven to rotate reliably, and the connection bolt can be attached to the self-drilling screw after construction. It is possible to easily remove the first nut from the outward male screw portion 7 and to remove the first nut from the outward male screw portion of the self-drilling screw.

  Therefore, the invention of the present application can secure the screwing of the self-drilling screw while retaining the effect of improving the construction efficiency by being able to fix the wall material to the structural material by the self-drilling screw such as a drill screw.

  As in claim 2, it is preferable to employ a combination of an engagement protrusion such as a square shape or a cross shape and an engagement hole as the engagement means because it is possible to ensure the transmission of torque from the connecting bolt to the self-drilling screw. .

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows embodiment, (A) is a partially broken isolation view, (B) is the BB view enlarged view of (A), (C) is the CC view enlarged view of (A). (A) is a figure which shows a screwed state, (B) is a figure which shows a removal state. (A) is a figure of the state which attached the joint metal fitting for scaffolds, (B) is sectional drawing after dismantling a scaffold.

(1) Description of Structure Next, an embodiment of the present invention will be described with reference to the drawings. The scaffold connecting device includes a drill screw 1, a first nut 2, a second nut 3, and a connecting bolt 4 that are arranged substantially concentrically. The drill screw 1 is an example of a self-drilling screw, and includes a drill portion 5 formed at one end thereof and a basic screw portion 6 subsequent thereto, and the other end portion is an outward male screw portion 7. A flange 8 is integrally formed between the basic screw portion 6 and the outward male screw portion 7. A dish-shaped washer 9 and a packing 10 are fitted into the basic screw portion 6. The outward male screw portion 7 has a larger diameter than the basic screw portion 6.

  The first nut 2 uses a hexagonal high nut (long nut), and a female screw 11 that is screwed with the outward male screw portion 7 of the drill screw 1 is formed over the entire length. On the other hand, the second nut 3 has the same appearance as the hexagonal high nut, and has an internal thread 12 formed therein, but the second nut 3 has a diameter that is slightly larger than the first nut 2. The internal diameter of the female screw 12 is also larger than that of the female screw 11 of the first nut 2.

  The connecting bolt 4 is inserted through the second nut 3, and its shaft portion is exposed from the second nut 3 and screwed into the first nut 2. Further, the connecting bolt 4 includes a countersunk head 13 positioned inside the second nut 3, and the countersunk head 13 of the connecting bolt 4 is connected to one end of the second nut 3 positioned on the first nut 2 side. A taper surface 14 on which the seating surface of the connecting bolt 4 cannot be removed and an inward flange 15 on which the shaft of the connecting bolt 4 is loosely fitted are formed. A hexagonal engagement hole (recess) 17 into which the hexagon wrench 16 is fitted is vacant on the top surface of the countersunk head 13.

  The first nut 2 and the second nut 3 are a kind of universal joint, and the posture of the second nut 3 can be arbitrarily changed to a posture intersecting with the first nut 2 within a certain range. In other words, the second nut 3 can be freely swung with respect to the first nut 2 within a certain range (for example, about 10 ° with respect to the axis of the first nut 2).

  And while the hexagonal engagement protrusion 18 is formed in the front-end | tip of the connection bolt 4, the engagement hole in which the engagement protrusion 18 fits in the end surface of the outward male screw part 7 in the drill screw 1 so that relative rotation is impossible. 19 is formed, and the engagement protrusion 18 and the engagement hole 19 constitute engagement means described in the claims. It is also possible to form the engagement protrusion 18 on the outward male screw portion 7 and form the engagement hole 19 on the tip surface of the connecting bolt 4.

  As can be understood from FIG. 2B, the connecting bolt 4 is screwed into the first nut 2 with the drill screw 1 separated from the first nut 2, and the engaging protrusion 18 protrudes from one end of the first nut 2. By doing so, the engagement protrusion 18 of the connecting bolt 4 can be fitted into the engagement hole 19 of the outward male screw portion 7. Then, after fitting the engagement protrusion 18 into the engagement hole 19 and screwing the first nut 2 into the outward male screw portion 7, as shown in FIG. 2 (A), the scaffold tethering device is connected as a whole. One appearance is exhibited.

  Therefore, in a state where the first nut 2 is attached to the outward male screw portion 7 of the drill screw 1, the distance between the first nut 2 and the second nut 3 is at least the same as the protruding dimension of the outward male screw portion 7. By setting so as to be able to open, insertion / removal of the engagement protrusion 18 with respect to the engagement hole 19 is allowed.

(2). Summary The building to be used for the scaffolding device has a structure in which a wall material 21 such as an ALC panel or a heat insulation panel is attached to a structural material 20 such as an angle material or C-shaped steel. As shown, the scaffold tethering device is attached to the building by rotating the drill screw 1 with a wrench 16 via the connecting bolt 4. That is, in a state where the wall material 21 is pressed by the flange 8 via the packing 10 and the washer 9, the drill screw 1 is screwed into the structural material 20 of the building, so that the scaffolding connecting device is attached to the building.

  As shown in FIG. 3 (A), the scaffold is provided with a pipe support 22, and a joint fitting 23 that holds the support 22 is fixed to the end face of the second nut 3 with a bolt 24. In this case, since the second nut 3 can be swung within a certain range, the joint fitting 23 can be fastened to the second nut 3 even if the position of the support column 22 is slightly shifted. The bolt 24 is screwed in a state in which the second nut 3 is held in a non-rotatable manner by a spanner.

  When removing the scaffold, the joint fitting 23 may be removed and then the first nut 2 may be screwed back by hand. Since the first nut 2 does not bite into the outward male screw portion 7 of the drill screw 1, it can be easily removed while preventing the drill screw 1 from returning.

  Since the outward male thread portion 7 of the drill screw 1 has an engagement hole 19, the first nut 2 can be removed and then tightened with the wrench 16. Moreover, when it becomes necessary to remove the drill screw 1, it can be easily removed.

  Even after the scaffold is dismantled, the drill screw 1 remains attached to the building, and the drill screw 1 continues to function as a fastening member for the wall material 21. Therefore, it is possible to reduce the labor of building construction. In addition, when the outward male screw portion 7 of the drill screw 1 remains exposed after the building is completed, the exposed portion may be covered with a cap 25 made of resin or the like as shown by a one-dot chain line in FIG. . When the outward male screw portion 7 is hidden with mortar or covered with a siding material, a special covering means is not necessarily required.

  In the present embodiment, in the state where the first nut 2 is screwed into the outward male screw portion 7, there is an interval between the first nut 2 and the second nut 3 that is the same as the protruding dimension of the outward male screw portion 7. The gap can be made small by fitting a C-shaped elastically deformable spacer 26 into the connecting bolt 4 as shown by a one-dot chain line in FIG. The spacer 26 is removed when the scaffold is removed.

  In the embodiment, the drill screw 1, the first nut 2, and the second nut 3 are a set, but when the scaffold is removed, the first nut 2 and the second nut 3 are removed from the building. The removed first nut 2 and second nut 3 may be discarded, or the drill screw 1 may be supplemented and reused as a new set.

  The present invention can be embodied in various ways. For example, in the above embodiment, the head of the connecting bolt 4 is formed on the countersunk head 13, but a cylindrical head, a pot head, a spherical head, or the like can be used as the head of the connecting bolt 4. It is also possible to form only the inward flange 15 at one end of the second nut 3 without forming the tapered surface 14. Moreover, the external shape of the 1st nut 2 and the 2nd nut 3 can also be formed in circular, a square, etc. Furthermore, as already mentioned, the engagement protrusion 18 and the engagement hole 19 can adopt other rectangular shapes such as a quadrangle and a pentagon, a star shape, a gear shape, and an elliptical shape.

  The present invention can be embodied in a scaffolding device. Therefore, it can be used industrially.

DESCRIPTION OF SYMBOLS 1 Drill screw as an example of self-drilling screw 2 1st nut 3 2nd nut 4 Connection bolt 5 Drill part 6 Basic screw part screwed into building 7 Outward external thread part 8 Flange 13 Countersunk head of connection bolt 16 Wrench 17 Connection bolt Wrench engagement holes (recesses)
DESCRIPTION OF SYMBOLS 18 Engagement protrusion which comprises engagement means 19 Engagement hole which comprises engagement means 20 Structural material 21 Wall material of building 22 Support | pillar which comprises scaffold 23 Joint metal fitting which comprises scaffold

Claims (2)

A self-drilling screw screwed into the building without drilling a pilot hole, and a first nut and a second nut arranged in series with the self-drilling screw,
While the self-drilling screw forms an outward male screw portion into which the first nut is screwed,
A connecting bolt having a shaft portion screwed into the first nut and a head with an engagement hole is inserted into the second nut, and the head of the connecting bolt is held in the second nut so as not to be detached. The second nut is connected to the first nut so as to freely swing,
The connecting bolt can be driven to rotate by a wrench inserted into the second nut, and the second nut can be fastened with a joint metal fitting constituting a scaffold with a bolt,
An engaging means is formed on the outward male threaded portion of the self-piercing screw and the tip of the connecting bolt so as to be engaged with each other by axial fitting so as not to rotate relative to each other.
Scaffolding device. The engaging means is composed of an engaging protrusion protruding from the tip of the connecting bolt and an engaging hole formed in an outward male thread portion of the self-drilling screw.
The scaffold tethering device according to claim 1.

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