JP2005282020A - Screwing auxiliary tool for building structure material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screwing auxiliary tool for a building structure material being capable of efficiently conducting screwing works to a structural material for a wooden building such as a column, a beam, a sleeper, a post or the like easily while having an excellent looseness preventive function and being capable of improving the aseismicity of the building. <P>SOLUTION: The screwing auxiliary tool for a building structure material is composed of a nut, a spring, in which a lower end section is fixed onto the top face section of the nut, and a washer in which an underside is fixed at the upper end section of the spring. In the screwing auxiliary tool, the central axes of these nut, spring and washer are arranged on the same axis. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention can efficiently and easily perform a screwing operation to a structural material of a wooden building such as a column, a beam, a large pull, a bundled column, and has an excellent anti-loosening function, and the earthquake resistance of the building It is related with the screwing auxiliary tool of the building structure material which can improve.

In general, in wooden buildings, plate-shaped connection hardware is often used to connect structural materials such as columns, beams, overdraws, and bunch columns, and these connection hardware are screwed to the structural material. By doing so, the structural members are connected and fixed.
However, in the conventional method of simply screwing the connection hardware, the screw may be loosened over time due to a change in the size of the wood over time. For this reason, when strong vibration due to an earthquake is applied, there is a risk that the structural materials connected by the connection hardware may be displaced or detached, and in the worst case, the building may collapse.
In addition, when attaching the connection hardware, the work is handled while handling the connection hardware, screws and screw fasteners with the left and right hands, so the workability is very poor and difficult for unskilled persons. There was also. Further, the screwing operation under the shaft assembly is not easy to work, and it is difficult to drive the screws perpendicular to the structural material in a short time.

As a technique for solving the above-described problem of screw looseness, a bolt loosening prevention mechanism used for a connecting portion of building members has been proposed (see Patent Document 1).
The bolt locking mechanism disclosed in Patent Document 1 uses the elastic force of a coil spring to automatically apply a tightening force to the bolt to exhibit the locking effect.

However, although this disclosed technique may be effective in preventing bolts from loosening, the above-described problem of workability cannot be solved.
In other words, in the above disclosed technique, it is necessary to use at least a bolt, two nuts, and a coil spring. Therefore, many small parts must be handled together with screw fasteners and connecting hardware at the time of work, and workability is very poor. .
In addition, the problem that it is difficult to drive a screw perpendicular to a structural material under a working environment such as a shaft assembly cannot be solved.

Japanese Patent Laid-Open No. 9-229046

  The present invention has been made to solve the above-mentioned problems of the prior art, and is capable of efficiently and easily performing screwing work for structural members of wooden buildings such as columns, beams, overdraws and bundled columns. In addition, the present invention is intended to provide a screwing aid for a building structure material that has an excellent loosening prevention function and can improve the earthquake resistance of a building.

The invention according to claim 1 comprises a nut, a spring having a lower end fixed to the upper surface of the nut, and a washer having a lower surface fixed to the upper end of the spring. The nut, the spring, and the central axis of the washer It is related with the screwing auxiliary tool of the building structural material characterized by being arrange | positioned on the same axis line.
According to a second aspect of the present invention, there is provided a holding claw having a circular arc when viewed from the bottom, which can be bent inward, around a screw hole on the lower surface of the nut. The present invention relates to a structural material screwing aid.
The invention according to claim 3 relates to a screwing aid for a building structure material according to claim 2, wherein the holding claw comprises a flat mounting plate having a through hole into which the holding claw can be fitted and fixed.

The invention according to claim 4 relates to the screwing aid for building structure material according to claim 3, wherein the mounting plate has a plurality of through holes.
The invention according to claim 5 is characterized in that the mounting plate has a rectangular shape, and the plurality of through holes are arranged in the longitudinal direction of the rectangular shape. Concerning ingredients.
The invention according to claim 6 is characterized in that the mounting plate is L-shaped, and the plurality of through holes are respectively arranged on one side and the other side across an L-shaped right angle. It is related with the screwing auxiliary tool of the construction structural material of description.

According to the first aspect of the present invention, the tensile force can be always applied to the screw driven into the structural material by the elastic repulsive force of the spring. It is possible to prevent this, and it is possible to impart excellent earthquake resistance to the building. In addition, since the screw can be tightened into the structural material after inserting the screw into the nut via the washer and spring arranged on the same axis, the screw can be securely and easily perpendicular to the structural material. It becomes possible to drive in, and the workability is extremely excellent. And since it is a simple structure, it can manufacture at low cost.
According to the second aspect of the present invention, since the holding claw having a circular arc in bottom view that can be bent inward is provided around the screw hole on the lower surface of the nut, the holding claw is bent and connected. By inserting into a through hole provided in the hardware, it is possible to fix the connection hardware to the building structure material by driving a screw vertically with the nut fixed to the connection hardware.
According to the third aspect of the present invention, the nut can be integrated with the mounting plate by inserting and fixing the holding claw into the through hole provided in the flat mounting plate, so that the building is constructed at the time of work. It becomes easy to arrange the screw hole of the nut perpendicular to the surface of the structural material.

According to the invention of claim 4, the mounting plate can be used as a connection hardware for connecting the structural members during work, and it is not necessary to prepare a separate connection hardware, so that workability can be improved. It becomes possible.
According to the invention which concerns on Claim 5, in the part where structure materials are connected in T shape, the connection structure of the wooden building which does not loosen a screw | thread with time does not arise by using a mounting plate as a connection metal fitting. Can be obtained.
According to the invention which concerns on Claim 6, in the part where structure materials are connected in L shape, the connection structure of the wooden building which does not produce the loosening of a screw | thread with time does not arise by using a mounting plate as a connection metal fitting. Can be obtained.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a preferred embodiment of a building structure material screwing auxiliary tool according to the invention will be described with reference to the drawings.
FIG. 1 is a perspective view of an auxiliary screwing tool for building structure materials according to the present invention.
The screwing auxiliary tool (1) according to the present invention is used when a screw (lag screw) is vertically driven (screwed) into a structural material of a wooden building such as a column, a beam, an overhang, a bundled column, etc. And it is comprised from a nut (2), a spring (3), and a washer (4).

  As the nut (2), a hexagonal nut in a standard product such as JIS can be used, but if the top and bottom surfaces are flat and have a female screw hole perpendicular to the bottom surface, For example, a cylindrical shape may be used.

The spring (3) is formed of a coil spring, and the inner diameter of the coil spring is set equal to or slightly larger than the diameter of the female screw hole of the nut (2).
The lower end of the spring (3) is integrally fixed to the surface of the nut (2) by fixing means such as welding.

As the washer (4), a plain washer or a spring washer, which is a standard product such as JIS, can be used, but a lower surface is flat (or flattened by pressing) and a through hole perpendicular to the lower surface is formed. If it has, the external shape will not be specifically limited.
The inner diameter of the washer (4) is set equal to or slightly larger than the diameter of the female screw hole of the nut (2).
The lower surface of the washer (4) is integrally fixed to the upper end of the spring (3) by fixing means such as welding.

The nut (2), the spring (3), and the washer (4) described above are integrated with their central axes (axis passing through the center of the hole) arranged on the same axis.
Therefore, the screw inserted through the washer (4) and the spring (3) is naturally guided perpendicularly to the female screw hole of the nut (2).

FIG. 2 is an external view showing an example of the usage state of the screwing auxiliary tool for building structure materials according to the present invention, and FIG. 3 is a sectional view in this usage state.
The screwing auxiliary tool (1) according to the present invention is used when, for example, a conventionally known connection fitting (5) is screw-fixed to a building structure material (6) such as a beam, a column, an overdraw, a bundled column. be able to.

  When the connection hardware (5) is screw-fixed to the building structure material (6) using the screwing aid (1) according to the present invention, first, the connection hardware ( 5) is arranged. Next, with the lower surface of the nut (2) in contact with the upper part of the through hole provided in the connection metal fitting (5), the screw (7) is sequentially inserted through the washer (4) and the spring (3) to form the nut. Screw into (2) and screw into the structural material (6) against the elastic repulsive force of the spring (3) and fix.

In the above operation, the operator can start the screwing operation in a state where the screw (7) is inserted through the washer (4) and the spring (3) and screwed into the nut (2) in advance. Excellent workability.
Moreover, the screw (7) is guided by the washer (4), the spring (3), and the nut (2) arranged on the same axis and is tightened to the structural member (6). It is possible to reliably and easily drive perpendicular to the structural material (6).

  Further, as described above, the screw (7) driven into the structural member (6) is always in a state where the tensile force is urged upward by the elastic repulsive force of the spring (3). It is difficult to loosen and does not easily loosen even when subjected to vibrations such as an earthquake.

In the screwing auxiliary tool (1) according to the present invention, as shown in FIG. 4, a holding claw (22) that can be bent inward around the screw hole (21) on the lower surface of the nut (2). Can be provided.
As shown in FIG. 4A, the holding claw (22) is composed of three thin plate pieces having an arc shape when viewed from the bottom, and these thin plate pieces are arranged around the screw hole (21) at equal angular intervals. . And the outer diameter of the holding nail | claw (22) which consists of these thin plate pieces becomes a small diameter as it goes below, as shown in FIG.4 (b).

Thus, by providing the holding claw (22) that can be bent inward around the screw hole (21) on the lower surface of the nut (2), as shown in FIG. It is possible to fit this holding claw (22) into the through hole (51) provided in.
Therefore, it is possible to tighten the screw vertically with the nut (2) fixed to the connection hardware (5), and the operator can very easily attach the screw (7) to the structural material (6). It becomes possible to fix the connection hardware (5) by driving.

Moreover, the screwing auxiliary tool according to the present invention has a through-hole in which the holding claw (22) can be fitted and fixed, and is attached to the holding claw (22) so as to be detachable. 8).
FIG. 6 is an external view showing the screwing auxiliary tool (1) provided with the mounting plate (8), and FIG. 7 is a cross-sectional view showing the state of use.
The inner diameter of the through hole (81) of the mounting plate (8) is slightly smaller than or substantially equal to the outer diameter of the holding claw (22) in the natural state, and the holding claw (22) is moved inward. If it is slightly bent and fitted, it does not come off easily.

  By providing the mounting plate (8) as described above, the holding claws (22) provided on the nut (2) are fitted and fixed in the through holes (81) provided on the flat mounting plate (8). Thus, the nut (2) can be used integrally with the mounting plate (8). Thereby, since the nut (2) can be arrange | positioned via a mounting plate (8) with respect to the surface of a building structure material at the time of work, the screw hole (21) of a nut (2) is made into the surface of a building structure material. It becomes easy to arrange | position perpendicular | vertical to.

The shape of the mounting plate (8) in plan view is not particularly limited, and any shape such as a square, a rectangle, or a circle can be adopted, but the size (area) is at least the size (area) of the nut (2). ) Is made larger.
The number of through holes (81) is one in the example shown in FIG. 6, but two or more can be provided.
When the mounting plate (8) has a plurality of through holes (81), the mounting plate (8) can be used as a connection hardware for connecting the structural members to each other at the time of work. As a result, there is no need to prepare a separate connection hardware, so that workability can be improved.

FIG.8 and FIG.9 is a figure which shows the screwing auxiliary tool (1) provided with the attachment plate (8) of another shape.
In the example of FIG. 8, the mounting plate (8) has a rectangular shape, and a plurality of (two in the illustrated example) through holes (81) are arranged in the longitudinal direction of the rectangular shape. According to such a mounting plate (8), as shown in FIG. 10, in a portion where the structural members (6) are connected in a T-shape, the structural members are connected to each other using the mounting plate (8) as a connecting hardware. It becomes possible to connect (for example, a large drawing and a bundle pillar).

In the example of FIG. 9, the mounting plate (8) is L-shaped, and a plurality of (two in the illustrated example) through-holes (81) are respectively arranged on one side and the other side across the L-shaped right angle. Yes. According to such an attachment plate (8), as shown in FIG. 11, in the portion where the structural members (6) are connected in an L shape, the structural members (for example, Columns and beams) can be connected.
8 and 9, the retaining claws (22) provided on the nut (2) are detachably fitted into the through holes (81) of the mounting plate (8) in both of the screwing aids (1). The nut (2) can be used integrally with the mounting plate (8).

  The present invention relates to a screw for a building structure material that can easily and firmly fix a connection hardware to a structural material of a wooden building such as a column, a beam, a large drawing, a bundle column, and improve the earthquake resistance of the building. It relates to a stop aid.

It is a perspective view of the screwing auxiliary tool of the building structure material which concerns on this invention. It is an external view which shows an example of the use condition of the screwing auxiliary tool of the building structure material which concerns on this invention. It is sectional drawing in the use condition of the screwing auxiliary tool of the building structure material which concerns on this invention. It is a figure which shows the suitable example of a change about the nut part of the screwing auxiliary tool of the building structure material which concerns on this invention. It is a figure which shows a mode that a holding nail is fitted to the through-hole provided in the connection metal fitting. It is an external view which shows the screwing auxiliary tool provided with the attachment plate. It is sectional drawing which shows the use condition of the screwing auxiliary tool of FIG. It is a figure which shows the screwing assistance tool provided with the attachment plate of another shape. It is a figure which shows the screwing assistance tool provided with the attachment plate of another shape. It is a figure which shows the use condition of the screwing assistance tool provided with the attachment plate of FIG. It is a figure which shows the use condition of the screwing assistance tool provided with the attachment plate of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Screw fastening aid 2 Nut 21 Screw hole 22 Holding claw 3 Spring 4 Washer 5 Connection metal fitting 6 Building structural material 7 Screw 8 Mounting plate 81 Through hole

Claims (6)

  A nut, a spring having a lower end fixed to the upper surface of the nut, and a washer having a lower surface fixed to the upper end of the spring, and the central axes of the nut, the spring, and the washer are arranged on the same axis. A screwing aid for building structural materials.   The auxiliary screwing tool for a building structure material according to claim 1, wherein a holding claw having a circular arc in bottom view that can be bent inward is provided around a screw hole on the lower surface of the nut.   3. The building structure material screwing auxiliary tool according to claim 2, wherein the holding claw comprises a flat mounting plate having a through hole into which the holding claw can be fitted and fixed.   4. The building structure material screwing aid according to claim 3, wherein the mounting plate has a plurality of through holes.   5. The building structure material screwing aid according to claim 4, wherein the mounting plate is rectangular, and the plurality of through holes are arranged in a longitudinal direction of the rectangular shape. The said mounting plate is L-shaped, The said several through-hole is respectively arrange | positioned on the one side and the other side which pinched | interposed the L-shaped right angle, The screwing of the building structure material of Claim 4 characterized by the above-mentioned. Auxiliary tool.

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