JP4545964B2 - Tightening nut for shaft assembly - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a tightening nut for a shaft assembly, which is used for, for example, screwing into an anchor bolt (projected from foundation concrete) through which a foundation (made of wood) is inserted and fastening the foundation to the foundation concrete. Is.
[0002]
[Prior art]
On one side of the cylindrical main body formed with a female screw that is screwed into a bolt for a shaft assembly such as an anchor bolt, a circular collar piece that is engaged with a shaft assembly material through which the bolt is inserted is provided. There is a structure in which a plurality of cutting blades for cutting a wooden shaft assembly material are provided on the back surface having a bowl shape (or an inclined shape).
[0003]
[Problems to be solved by the invention]
In the conventional example, an anchor bolt protruding from the foundation concrete is generally inserted into a through-hole formed in the base, and a cylindrical main body is screwed into the anchor bolt, and the surface of the base is cut by a cutting blade provided on the flange piece. Is used to tighten the foundation to the foundation concrete so that there is no unnecessary protrusion on the surface. Since the back surface of the steel plate has a bowl shape (in other words, a tapered shape in the direction in which the cylindrical main body is screwed to the anchor bolt), when the nut is rotated by a tool, the rotational force is applied to the cutting blade and the base is rapidly In some cases, the base is sometimes cracked to weaken its strength.
[0004]
The present invention has been devised for the purpose of providing a tightening nut for a shaft assembly that pays attention to such a point and prevents the shaft assembly material from being damaged as much as possible.
[0005]
[Means for Solving the Problems]
On one side of a cylindrical main body formed with a female screw that is screwed into a bolt for a shaft assembly, a circular collar piece that is engaged with the shaft assembly material that has been inserted through the bolt is provided, and the collar piece is flattened. A plurality of cutting blades having a blade tip on the screwing direction side of the cylindrical main body and the bolt on the back surface, long in the direction intersecting with the screwing direction, and at least the entire moving locus substantially coincides with the back surface. Basically, protrusions are arranged side by side in the screwing direction, and a locking blade having a cutting edge opposite to the cutting edge is protruded between the cutting blades with an amount of protrusion equivalent to that of the cutting blade. As a means, a receiving groove for locking the rotary tool is provided by recessing the surface of the flange piece, and the cutting blade is constituted by the portion of the flange piece constituting the receiving groove, whereby the shaft assembly by the cutting blade is provided. The cutting operation of the material (wood) is performed smoothly.
[0006]
【Example】
The drawings show an embodiment of a tightening nut for a shaft assembly according to the present invention. FIG. 1 is a partially cutaway front view, FIG. 2 is a plan view, FIG. 3 is a bottom view, and FIG. is there.
[0007]
In the figure, reference numeral 1 denotes a cylindrical main body of the tightening nut A for a shaft assembly, and the cylindrical main body 1 is constituted by a cylindrical body provided with a female screw 2 screwed into an anchor bolt 10 in a lumen portion. A tightening nut A is formed by connecting a circular flange 4 centering on the cylindrical main body 1 to the upper end which is one side of the nut.
[0008]
The flange 4 is formed of the circular flat plate whose back surface (lower surface) 4 ′ is flat, and the back surface 4 ′ has a direction crossing the screwing direction with the anchor bolt 10 of the cylindrical main body 1. Like the cutting blade 5, the plurality of cutting blades 5, which are long and arranged at equal intervals, and the cutting blade 5 is long in a direction intersecting with the screwing direction of the anchor bolt 10 of the cylindrical main body 1. The locking blades 6 project from each other.
[0009]
The cutting blade 5 has a tip (lower end) formed on the screwing direction side as a cutting edge 5a. That is, the cutting blade 5 is rotated in a direction in which the cylindrical main body 1 is screwed to the anchor bolt 10 to thereby remove the surface of the base 11. The locking blade 6 is provided with a cutting edge 6a configured in a direction opposite to the cutting edge 5a of the cutting blade 5, and the hook piece 4 (nut A) rotates in a direction opposite to the screwing direction. When an attempt is made, the cutting blade 5 is cut (locked) on the cutting surface 12 ′ formed on the base 11 by cutting.
[0010]
The cutting blade 5 and the locking blade 6 of the embodiment have a triangular cross section as shown in FIG. 1, but it is not necessary to limit the shape to the illustrated shape. The surface of the base 1 is cut when it is rotated to a shape where a cutting hole 12 into which the flange 5 is immersed in the base 11 is formed, and the locking blade 6 is formed by the flange 5. After the cutting operation (nut nut A tightening operation), it presses against (cuts into) the cutting surface 12 ′, which is the bottom surface of the cutting hole 12, and rotates in a direction opposite to the screwing direction of the flange 5, that is, the nut A (slightly) Anything that regulates the
[0011]
The cutting hole 12 formed by cutting the surface of the base 11 made of wood with the cutting blade 5 is formed in the wood so that the surface is rough, and the surface of the cutting surface 12 ′ is uneven, which is of the example. Uses the roughness (unevenness) of the cutting surface 12 'made of such wood to prevent the locking blade 6 from being caught on the cutting surface 12' and preventing the entire nut A from rotating in the anti-screwing direction. In the embodiment, the locking blade 6 has the same height (thickness) as the cutting blade 5, but the same is because the locking blade 6 is the base (in the screwing direction). (Wood) 11 is not caught by the cutting blade 5 and is smoothly cut. In the anti-screwing direction, the locking blade 6 is easily caught on the cutting surface 12 ′ (wood) and the entire nut A is removed. This is because it becomes easier to regulate the rotation.
[0012]
Therefore, since it is sufficient for the locking blade to perform this restriction, there is no problem even if there is a slight difference in height from the cutting blade 5 as long as the restriction can be made. In the claims, this means that the locking blade has the same amount of protrusion as the cutting blade.
[0013]
The number of the cutting blades 5 is four, and they are arranged at equal intervals in the circumferential direction. This is because the nut A (strip 4) is cut by a tool (generally, an electric tool) in the cutting direction (the above-mentioned When rotating in the screwing direction), the force is uniformly applied to the entire circumferential direction of the flange piece 4 to smoothly cut the base 11 (wood), and it is not necessarily limited to the number of embodiments. However, when the plurality are arranged at equal intervals, the surface of the base 11 can be cut smoothly without being biased to one side, and therefore, the screwing of the cylindrical main body 1 to the anchor bolt 10 is performed smoothly.
[0014]
In any case, it is only necessary that the movement trajectory formed by the cutting blade along the previous screwing direction substantially coincides with the back surface as a whole, that is, the flange 4 is immersed in the cutting hole 12 formed by the cutting blade 5. It is only necessary that the nut A and the base 11 that is the shaft assembly are in the same plane.
[0015]
The number of the locking blades 6 and the amount of contact with the cutting surface 12 ′ are preferably as small as possible. However, as in the embodiment, a shape (triangular shape) opposite to the cutting edge 5 a of the cutting blade 5 is used. And it becomes easy to catch on cutting surface 12 ', and the function can be fulfilled rationally.
[0016]
A receiving groove 8 is provided on the surface (upper surface) of the flange 4 at a position corresponding to the cutting blade 5, and a tool tip is locked in the receiving groove 8. A rotational force is transmitted to A.
[0017]
In addition, the central square hole 7 provided in communication with the lumen portion (internal thread portion) of the cylindrical main body 1 is for locking the tool tip at the same time or at different times, and may be omitted. There is no support for the implementation of the invention.
[0018]
The receiving groove 8 can be formed by recessing the surface of the flange piece 4 by pressing means. In this case, if the cutting blade 5 is simultaneously formed by recessing the surface of the flange piece 4, That is, when the cutting blade 5 is constituted by the flange 4 portion constituting the receiving groove 8, the tool tip that engages with the receiving groove 8 directly presses the cutting blade 5 in the rotational direction of the cutting blade 5. As a result, the cutting blade 5 is surely pressed against the base 11 without shaking, and as a result, a larger pressing force that is indirectly pressed against the cutting blade 5 is reliably loaded. ) Cutting with the surface cutting blade 5 can be performed smoothly.
[0019]
Then, this axial tightening nut A is screwed in the cylindrical main body 1 to an anchor bolt 10 which is erected on the foundation concrete 13 and is inserted into the base 11 placed on the foundation concrete 13. 7 and the receiving groove 8 are engaged with a power tool (special tip material) and the nut A is rotated, the tightening nut A descends along the anchor bolt 10 to clamp the base 11 to the foundation concrete 13 while cutting. The blade 5 cuts the periphery of the through-hole 14 through which the anchor bolt 10 is inserted, and the cutting hole 12 is formed by the cutting of the blade 9, and at the same time, the flange 4 is placed in the cutting hole 12, that is, in the base 11. The foundation 11 is fastened and fixed to the foundation concrete 13 without embedding and useless protrusions on the foundation 11.
[0020]
Then, even when an external force is applied and the nut A tries to rotate in the anti-threading direction, the locking blade 6 is locked to the cutting surface 12 'to prevent it, and the nut A maintains the initial tightened state.
[0021]
Although an Example shows the example which used this invention product for the base 11, of course, you may screw and apply to the bolt body at the time of joining a pillar and a horizontal member, for example.
[0022]
【The invention's effect】
Since the present invention is configured as described above, the surface portion of the shaft assembly over which the pieces overlap is made uniform in the radial direction of the pieces, and can be cut shallowly, as in the conventional example. Since the load is not partially concentrated, it is possible to prevent cracks from occurring in the wooden frame assembly material. It is possible to prevent the loosening by being locked to the cutting surface of the steel and to keep the initial shaft assembly state as much as possible.
[Brief description of the drawings]
FIG. 1 is a partially cutaway front view.
FIG. 2 is a plan view.
FIG. 3 is a bottom view.
FIG. 4 is a cross-sectional view showing a use state.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cylindrical main body 2 Female screw 4 Collar piece 4 'Back surface 5 Cutting blade 5a Cutting edge 6 Locking blade 6a Cutting edge 10 Anchor bolt 11 Base

Claims (2)

On one side of the cylindrical main body formed with a female screw that is screwed into a bolt for a shaft assembly, a circular collar piece is provided to be engaged with the shaft assembly material through which the bolt is inserted, and the collar piece is flattened. A plurality of cutting blades having a blade tip on the screwing direction side of the cylindrical main body and the bolt on the back surface, long in a direction crossing the screwing direction, and at least the entire moving locus substantially coincides with the back surface. For shaft assembly, protruding in parallel in the screwing direction, and having a protruding amount equivalent to that of the cutting blade between the cutting blades, and a locking blade provided with a cutting edge facing the cutting edge. Tightening nut. 2. A tightening nut for a shaft assembly according to claim 1, wherein a surface of the flange is recessed to provide a receiving groove for locking the rotary tool, and a cutting blade is formed by the portion of the flange that forms the receiving groove. .

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