Anchor bolt bored base nut for wooden groundsill

Abstract

To provide an anchor bolt bored base nut for a wooden ground sill which has good workability during manufacturing and can reduce CO2 emission amount.SOLUTION: A bored base nut 22 is screwed onto an upper end of an anchor bolt 21 that is embedded in a foundation of a wooden building and inserted into a through hole 13 of a groundsill, and has a receiving hole 223 that receives the anchor bolt 21 and extends in a vertical direction, and a base surface 224 that comes into contact with an upper surface of the groundsill. By using a plastic material, the bored base nut 22 has good workability during manufacture and reduces CO2 emission amount.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to a seat-drilled nut for an anchor bolt for a wooden foundation. [Background technology]

[0002] In wooden buildings using methods such as the rigid floor method, the joist-less method, and the 2×4 method, there is known a method that includes an anchor bolt that is buried in the foundation to fix the foundation, a through hole that passes vertically through the wooden foundation into which the anchor bolt is inserted, and a nut that is screwed into the upper end side of the anchor bolt (see Patent Document 1). In Patent Document 1, a metal seat-mounted nut is used as the nut. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7018550 Summary of the Invention [Problem to be solved by the invention]

[0004] However, metal seat nuts have poor workability during the manufacturing process, which limits the shape they can be made into after processing, and as a result, the functions they can be given are also limited. 2 Another problem is that emissions are relatively high.

[0005] The present invention has been made in consideration of the above problems, and provides a method for manufacturing a carbon fiber composite material that has good processability and is CO 2 The object of the present invention is to provide a seat-carved nut for an anchor bolt for wooden foundations that can reduce emissions. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention provides a seat-drilled nut for a wooden foundation anchor bolt, which is made of plastic and is adapted to screw into an upper end side of an anchor bolt that is embedded in the foundation of a wooden building and inserted into a through-hole in a wooden foundation, and which has a receiving hole that extends in the vertical direction to receive the anchor bolt, and a seat that comes into contact with the upper surface of the foundation.

[0007] In addition, in the above-mentioned wooden foundation anchor bolt seat-carved nut, it is preferable that the receiving hole has a threaded section in which a female thread is formed to screw together with the male thread of the anchor bolt, and a non-threaded section that is disposed continuously above the threaded section and in which no female thread is formed and into which the male thread of the anchor bolt is to be engaged.

[0008] In addition, it is preferable that the above-mentioned wooden foundation anchor bolt seat carved nut has a tubular portion that is arranged in the through hole of the foundation and extends in the vertical direction, and that the tubular portion has a centering guide portion that is formed to protrude from the outer circumferential surface and is inclined radially inward as it goes downward.

[0009] In addition, it is preferable that the above-mentioned wooden foundation anchor bolt seat carving nut is provided with a plurality of drill bits formed to protrude from the seat surface, extending radially and spaced apart in the circumferential direction, and a plurality of auxiliary bits formed to protrude between the drill bits on the seat surface. Effect of the Invention

[0010] The seat-carved nut for a wooden foundation anchor bolt of the present invention has good processability during manufacturing and is also CO 2 Emissions can be reduced. [Brief description of the drawings]

[0011] [Figure 1] 1 is a schematic explanatory diagram of a cooperative mechanism between an anchor bolt and a distributed seismic isolation device according to one embodiment of the present invention. FIG. [Diagram 2] FIG. [Diagram 3]FIG. 2 is a front cross-sectional view of a seat nut. [Figure 4] FIG. 4 is an enlarged cross-sectional view of a portion of a seat nut. [Diagram 5] FIG. [Figure 6] FIG. 4 is an enlarged cross-sectional view of a portion of a seat nut. [Figure 7] FIG. [Figure 8] FIG. 2 is a cross-sectional view illustrating a seat nut and an anchor bolt screwed together. [Figure 9] FIG. 1 is a front cross-sectional view of a countersunk nut showing a first modified example. [Figure 10] FIG. 11 is a bottom view of a countersunk nut showing a first modified example. [Figure 11] FIG. 11 is a top view of a countersunk nut showing a first modified example. [Figure 12] FIG. 11 is a front cross-sectional view of a countersunk nut showing a second modified example. [Figure 13] FIG. 11 is a top view of a countersunk nut showing a second modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Figures 1 to 8 show one embodiment of the present invention, where Figure 1 is a schematic explanatory diagram of the cooperative mechanism between an anchor bolt and a distributed seismic isolation device, Figure 2 is a front view of a seat-sink nut, Figure 3 is a front cross-sectional view of the seat-sink nut, Figure 4 is an enlarged cross-sectional view of a portion of the seat-sink nut, Figure 5 is a bottom view of the seat-sink nut, Figure 6 is an enlarged cross-sectional view of a portion of the seat-sink nut, Figure 7 is a top view of the seat-sink nut, and Figure 8 is a cross-sectional explanatory diagram of the seat-sink nut and anchor bolt screwed together.

[0013] As shown in FIG. 1, this wooden building includes a plurality of anchor bolts 21 buried in a foundation 11 for fixing a base 12, through holes 13 through which the anchor bolts 21 are inserted and which vertically penetrate the base 12, a seat-drilled nut 22 screwed into the upper end of the anchor bolt 21, and a distributed seismic isolation device 30 interposed between the foundation 11 and the base 12. The diameters of the anchor bolts 21 and the through holes 13 can be any diameter, but in this embodiment, the diameter of the anchor bolts 21 is 12 mm, and the diameter of the through holes 13 is 24 mm. In the building, hold-down hardware is provided on columns (not shown), and anchor bolts other than the anchor bolts 21 for fixing the base 12 are connected to the columns. In this embodiment, the foundation 11 is made of concrete, the base 12 is made of wood, and the anchor bolts 21 are made of metal. The distributed seismic isolation device 30 also has upper and lower plastic flat plates.

[0014] In this embodiment, the seat nut 22 is provided with a file function, a base straightening function, a loosening prevention function, a reaction force reinforcement function, a sinking function, a hole drilling supplement function, and the like. The seat nut 22 is made of plastic, and has a tubular portion 221 extending in the vertical direction and a flange portion 222 extending radially outward from the upper end side of the tubular portion 221 as shown in FIG. 2. In this embodiment, the seat nut 22 is an engineering plastic, and examples of the engineering plastic include polyamide, polyacetal, polycarbonate, modified polyphenylene ether, polybutylene terephthalate, polyphenylene sulfide, polysulfone, polyether sulfone, polyarylate, polyamide imide, polyether ether ketone, and liquid crystal polymer. The seat nut 22 can also be a fiber-reinforced plastic that uses plastic as a base material and is reinforced with glass fiber, carbon fiber, and the like. In this specification, "plastic" also includes fiber-reinforced plastic. In this way, since the seat nut 22 is made of plastic, CO during manufacturing is reduced compared to when the seat nut is made of zinc alloy or the like. 2 It is possible to reduce the amount of emissions, and further to reduce the manufacturing cost and the weight.

[0015] As shown in FIG. 3, the inner peripheral surface of the tubular portion 221 forms a receiving hole 223 that receives the anchor bolt, and the lower surface of the flange portion 222 forms a seat surface 224 that contacts the upper surface of the base 12. The receiving hole 223 extends in the vertical direction and has a reduced diameter section A, a threaded section B, and a non-threaded section C, which are successively arranged in this order from the lower end to the upper end. In the reduced diameter section A, the inner peripheral surface of the tubular portion 221 is formed with an inclination such that the diameter dimension decreases from the lower end of the receiving hole 223 toward the upper end, and guides the upper end of the anchor bolt 12 inserted into the receiving hole 223. In the threaded section B, the inner peripheral surface of the tubular portion 221 has a constant diameter dimension, and a female thread that screws into the male thread of the anchor bolt 21 is formed. In the non-threaded section C, the inner peripheral surface of the tubular portion 221 has a constant diameter dimension, and no female thread is formed, and the anchor bolt 21 is fixed by the male thread of the anchor bolt 21 biting into it.

[0016] An outer peripheral surface 225 of the tubular portion 221 below the flange portion 222 is formed with a constant diameter. The tubular portion 221 also has a centering guide portion 226 formed to protrude from the outer peripheral surface 225 below the flange portion 222 and inclined radially inward as it extends downward. In this embodiment, four centering guide portions 226 are formed at intervals in the circumferential direction.

[0017] In this embodiment, the flange 222 is formed such that the seating surface 224 is linearly inclined upward toward the radially outward side. As shown in FIG. 2, the flange 222 has a plurality of drill bits 227 formed to protrude from the seating surface 224, extending in the radial direction, and spaced apart in the circumferential direction. As shown in FIG. 4, each drill bit 227 is formed at the same height as the seating surface 224 at one circumferential end, and protrudes downward from the seating surface 224 by a predetermined dimension at the other circumferential end. Also, as shown in FIG. 5, each drill bit 227 is formed such that the circumferential dimension increases toward the radially outward side. Furthermore, each drill bit 227 is formed to be inclined toward the other circumferential side toward the radially outward side.

[0018] As shown in FIG. 5, the flange 222 has a plurality of auxiliary blades 228 formed between the drill blades 227 on the seat surface 224 so as to protrude therefrom. In this embodiment, as shown in FIG. 6, each auxiliary blade 228 is formed in a quadrangular pyramid shape. As shown in FIG. 5, each auxiliary blade 228 is arranged in a line with a radial interval between each drill blade 227. In this embodiment, the circumferential interval between each drill blade 227 increases toward the radially outer side, so that each auxiliary blade 228 arranged relatively outward in the radial direction is also arranged in a line with a circumferential interval. Specifically, each auxiliary blade 228 is arranged in five rows in the radial direction, with only one blade arranged in the circumferential direction in the first and second rows from the radially inner side, two blades arranged in the circumferential direction in the third and fourth rows from the radially inner side, and three blades arranged in the circumferential direction in the fifth row from the radially inner side. In this embodiment, each auxiliary blade 228 in the fifth row from the radially inner side is disposed at a radial end of the seating surface 224, and has a shape of a pyramid with half missing when viewed from below.

[0019] As shown in FIG. 3, the upper surface 229 of the flange portion 222 is formed horizontally. In this embodiment, the flange portion 222 has a recess 229a formed on the upper surface 229. The recess 229a is formed with a predetermined depth dimension, surrounds the receiving hole 223 in a top view as shown in FIG. 7, has an outer edge that is circular in a top view, and has an inner edge that is a regular hexagon in a top view. The recess 229a is provided for screwing the seat nut 22, and the shape can be changed arbitrarily. For example, the shape of the recess 229a in a top view may be a circular inner edge or a polygonal outer edge, or the recess 229a may be a two-hole type having two holes.

[0020] In addition, the outer edge of the flange 222 is circular when viewed from above, and compared to a case in which the outer edge is cut out, the contact area with the base 12 is larger, allowing for a larger reaction force. In other words, the countersunk nut 22 is endowed with a reaction force enhancing function. As shown in Fig. 8, the upper surface 229 of the flange 222 is at the same level as the upper surface of the base 12 after the countersunk nut 22 is tightened. Note that the upper end of the countersunk nut 22 after tightening may be lower than the upper surface of the base 12.

[0021] In this embodiment, the base 12 is installed on the base 11 so that the anchor bolts 21 pass through the through holes 13 while the distributed seismic isolation device 30 is placed on the top surface of the base 11. After that, as shown in FIG. 8, the countersink nut 22 is screwed into the anchor bolt 21. In this embodiment, the drill bits 227 and the auxiliary bits 228 are formed on the seat surface 224 of the countersink nut 22, so that the periphery of the through hole 13 on the top surface of the base 12 is cut by the bits 227 and 228 during screwing, and the top end of the countersink nut 22 can be easily made flush with the top surface of the base 12. That is, the countersink nut 22 is provided with a recessing function. This eliminates the need to perform countersinking by previously digging wood into the top surface of the base 12, improving construction accuracy and efficiency.

[0022] Since the seat nut 22 is made of plastic, it is easier to process than conventional metal ones, and it is easy to mold the drill bits 227 and the auxiliary bits 228 onto the seat surface 224. This makes it possible to realize complex blade shapes for the drill bits 227 and the auxiliary bits 228, which were previously difficult to achieve, and in this embodiment, the seat nut 22 is endowed with a file function.

[0023] In addition, since the receiving hole 223 of the seat nut 22 has a non-threaded section C, as shown in FIG. 8, the male thread of the anchor bolt 21 bites into the non-threaded section C of the receiving hole 223 when screwed, and the anchor bolt 21 and the seat nut 22 are locked. That is, the seat nut 22 is provided with a loosening prevention function. It is known that loosening is promoted not only by earthquakes but also by vibrations in daily life, and if plywood is present, a design can be made in which the plywood is used to suppress loosening, but in places where there is no plywood, measures to prevent loosening are necessary, and the seat nut 22 of this embodiment can provide measures to prevent loosening. The seat nut 22 of this embodiment can be used for all construction methods such as the rigid floor construction method, the joist-less construction method, the joist assembly construction method, and the 2×4 construction method.

[0024] In this embodiment, since the metal anchor bolt 21 is combined with the plastic seat nut 22, the seat nut 22 is weak against the anchor bolt 21, and the male threaded portion of the anchor bolt 21 can be simply and easily inserted into the non-threaded section C of the seat nut 22. As a result, compared to the conventional method in which an extra length is provided at the upper end of the anchor bolt and a nut to prevent loosening is provided, it is possible to save steel materials such as the extra length of the anchor bolt, the nut to prevent loosening, the spring washer, and the washer, which also contributes to cost reduction and CO2 reduction. 2 It is possible to reduce emissions, etc.

[0025] In addition, since the countersunk nut 22 has the centering guide portions 226, if the countersunk nut 22 and the anchor bolt 21 are misaligned from the center of the through hole 13, the centers of the countersunk nut 22 and the anchor bolt 21 are automatically corrected to the center of the through hole 13 when they are screwed in. In other words, the countersunk nut 22 is endowed with a base straightening function for the base 12. Therefore, there is no need to additionally drill the through hole 13, which was necessary in the conventional base straightening.

[0026] 9 to 11 show a first modified example of the present invention, in which FIG. 9 is a front cross-sectional view of the countersink nut, FIG. 10 is a bottom view of the countersink nut, and FIG. 11 is a top view of the countersink nut. The countersink nut 1022 of the first modified example has a flange 1222 with a different shape from that of the above embodiment. As shown in FIG. 9, the seat surface 1224 of the flange 1222 is formed in a curved shape concave upward in the front cross-section. In addition, each of the drill bits 1227 formed to protrude from the seat surface 1224 also has a curved shape in the front cross-section. The lower end of the flange 1222 is located lower than in the above embodiment, and as a result, the vertical dimension of the tube portion 1221 is shorter than in the above embodiment. Accordingly, each of the centering guide portions 1226 formed to protrude from the outer circumferential surface 1225 of the tube portion 1221 is also shorter in the vertical direction. In addition, the recess 1229a formed on the upper surface 1229 of the flange 1222 has a depth dimension greater than that of the previous embodiment. As shown in Fig. 11, the outer edge of the recess 1229a is circular when viewed from above, as in the previous embodiment, but the shape of the inner edge is different from that of the previous embodiment. Specifically, the inner edge of the recess 1229a is a regular hexagon with each side curved inwardly to be concave when viewed from above.

[0027] As shown in Fig. 10, each auxiliary blade 1228 is formed in a quadrangular pyramid shape like the above embodiment, but the arrangement is different from the above embodiment. Specifically, each auxiliary blade 1228 is arranged in six rows in the radial direction, and only one auxiliary blade is arranged in the circumferential direction in the first and third rows from the radial inside, three auxiliary blades are arranged in the circumferential direction in the second, fourth and fifth rows from the radial inside, and three auxiliary blades are arranged in the circumferential direction in the sixth row from the radial inside. In the modified example, each auxiliary blade 1228 in the sixth row from the radial inside is arranged at the radial end of the seat surface 1224, and has a shape of a quadrangular pyramid with half missing when viewed from below.

[0028] 12 and 13 show a second modified example of the present invention, where FIG. 12 is a front cross-sectional view of the countersunk nut, and FIG. 13 is a top view of the countersunk nut. The second modified example of the countersunk nut 2022 differs from the first modified example in the shape of the flange 2222. As shown in FIG. 12, the upper surface 2229 of the flange 2222 is formed such that the height of the inner side of the recess 2229a is lower than the height of the outer side. Also, the bottom surface of the recess 2229a is formed in a curved shape concave upward in the front cross section toward the radially outer side. As shown in FIG. 13, the inner edge of the recess 2229a is formed in a circular shape when viewed from above, and the outer edge has a shape that meanders in the radial direction when viewed from above. As shown in FIG. 12, the recess 2229a receives the protrusion 2001 of the socket 2000, and the upper surface 2229 inside the recess 2229a abuts against the lower surface 2002 of the socket 2000. In this way, the shape of the seat nut 2022 can be changed appropriately depending on the shape of the socket 2000.

[0029] In the above embodiment, the seat nut 22 has four centering guide portions 226, but the number of centering guide portions 226 can be changed as desired. Furthermore, it is also possible to adopt a configuration in which the centering guide portions 226 are omitted.

[0030] In the above embodiment, the seat nut 22 has a plurality of pyramidal auxiliary blades 228, but the shape of each auxiliary blade 228 may be arbitrary, and the arrangement of each auxiliary blade 228 may be changed arbitrarily. Furthermore, it is also possible to omit each auxiliary blade 228.

[0031] In the above embodiment, the receiving hole 223 of the seat nut 22 has the reduced diameter section A, the threaded section B, and the non-threaded section C, but it is also possible to omit the reduced diameter section A and the non-threaded section C. Furthermore, as described above, the shape of the recess 229a of the seat nut 22 can be appropriately changed as necessary. In the above embodiment, the distributed seismic isolation device 30 is installed between the foundation 11 and the base 12, but the distributed seismic isolation device may not be provided.

[0032] Although the embodiments of the present invention have been described above, the invention according to the claims is not limited to the above-described embodiments. It should be noted that not all of the combinations of features described in the embodiments are essential to the means for solving the problems of the invention. [Explanation of symbols]

[0033] 11 Basics 12 Foundation 13 Through hole 22 Seat groove nut 30 Distributed seismic isolation device 221 Cylinder part 222 Flange 223 Receptor Hole 224 Seat 225 Outer surface 226 Centering guide part 227 Drill blade 228 Auxiliary blade 229 Top surface 229a Recess 1022 Seat Engraved Nut 1221 Cylinder part 1222 Tsuba 1224 Seat 1225 Outer surface 1226 Centering guide part 1227 Drill blade 1228 Auxiliary blade 1229 Top surface 1229a Recess 2000 sockets 2022 Seat Engraved Nut 2222 Flange 2229 Top surface 2229a Recess A. Reducing diameter section B Thread section C Non-threaded section

Claims

1. A seat nut that is screwed onto an upper end side of an anchor bolt that is embedded in the foundation of a wooden building and inserted into a through hole of a wooden foundation, the seat nut having a receiving hole that receives the anchor bolt and extends in a vertical direction, and a seat that comes into contact with an upper surface of the foundation, A plastic anchor bolt seat nut for wooden foundations.

2. 2. The seat-carved nut for an anchor bolt for a wooden foundation according to claim 1, wherein the receiving hole has a threaded section having a female thread that screws together with the male thread of the anchor bolt, and a non-threaded section that is disposed continuously above the threaded section and has no female thread and into which the male thread of the anchor bolt is to be engaged.

3. A cylindrical portion is disposed in the through hole of the base and extends in a vertical direction, 2. The seat-carved nut for a wooden foundation anchor bolt according to claim 1, wherein the cylindrical portion has a centering guide portion formed on an outer circumferential surface thereof and inclined radially inwardly toward a downward direction.

4. A plurality of drill bits are formed on the seat surface, extend radially, and are arranged at intervals in the circumferential direction; 2. The seat-drilled nut for a wooden foundation anchor bolt according to claim 1, further comprising a plurality of auxiliary blades formed protruding between the respective drill bits on the seat surface.

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