JP2021038596A - Fastening tool for building - Google Patents

Abstract

To provide a fastening tool for elastically fastening mainly a framework portion of a wooden building which can easily perform a fastening work with a simple structure.SOLUTION: In a fastening tool for a building of this invention, there is provided, at one end of a cylindrical casing 11 whose both ends are open, a fixing spring receiver 14 fixed to the casing 11 side; there is provided, inside the other end portion, a movable spring receiver 16 which comprises a nut portion 5 at a center portion, which can move along a shaft center direction, and which is prevented from being pulled out; a coil spring 13 outwardly energizing the movable spring receiver 16 is interposed between the fixing spring receiver 14 and the movable spring receiver 16; and there is provided a bolt 6 one end of which is screwed into the nut portion 5 and the other end of which outwardly protrudes from the fixing spring receiver 14. The nut portion 5 is provided integrally with the movable spring receiver 16.SELECTED DRAWING: Figure 1

Description

The present invention mainly relates to a building fastener that elastically tightens a frame portion or the like of a wooden building.

Conventionally, there is known a tightening tool shown in Patent Document 1 as a tightening tool that elastically tightens a frame portion of a wooden building by using a spring, automatically absorbs looseness due to drying of wood, and maintains a tightened state.

Japanese Patent No. 5453159

In the invention of Patent Document 1, the coil spring is housed in a tubular case with both ends open, and the coil spring is tightened by using the elasticity of the coil spring when tightened by a bolt, and this elasticity absorbs the looseness of the framework portion. It always keeps the tightened state, and since the spring, spring receiver, and tightening bolt end are compactly housed in the casing, there are advantages such as good operability and low cost.

However, in the invention of the above document, since the nut for screwing the bolt at the casing end is separate from the movable spring receiver, the inside of the counterbore on the pillar material side is used when handling at the construction site, assembling parts, and tightening work. In addition to the troublesome and inefficient work of adjusting the screwed beam of the bolt while pinching the nut, there was a problem that the nut fell from a high place at the construction site due to the poor screwing, which was dangerous to the workers on the ground.

In the present invention for solving the above problems, first, a fixed spring receiver 14 fixed to the casing 11 side is provided at one end of a tubular casing 11 having both ends open, and a nut is provided in the center of the other end. A movable spring receiver 16 provided with a portion 5 and movable along the axial direction and prevented from coming off is provided, and a coil spring 13 for urging the movable spring receiver 16 outward is provided between the fixed spring receiver 14 and the movable spring receiver 16. It is a building tightening tool provided with a bolt 6 having one end screwed into the nut portion 5 and the other end protruding outward from the fixed spring receiver 14 while being inserted, and the nut portion 5 is referred to as a movable spring receiver 16. The feature is that it is provided integrally.

Secondly, a guide cylinder is projected from the inner surface of the central portion of the movable spring receiver 16, and one end of the bolt 6 is screwed into the guide cylinder to form a nut portion (5). There is.

Thirdly, the nut portion 5 is provided by fixing the nut to the outer surface of the movable spring receiver 16.

According to the tightening tool of the present invention configured as described above, since the movable spring receiver housed in the casing and the nut portion are integrated, the nut portion on the movable spring receiver side positioned in the casing at the construction site can be used. When screwing in while adjusting the set length of the bolt, the casing itself can be held and screwed in. As a result, the work can be performed more easily, efficiently and accurately than when the nut is screwed alone or when a finger is inserted into the small-diameter counterbore of the pillar material and screwed in. Can also be prevented.

In addition, when the nut part is provided by threading directly into the guide cylinder of the movable spring receiver, a nut part of sufficient length can be obtained, there are no protrusions such as nuts on the end surface of the movable spring receiver, and the counterbore protrusion is shallow. There are advantages that can be done.

It is an enlarged sectional view which shows the tightening tool of this invention. Similarly, it is a plan sectional view which shows the use state of a tightening tool. It is a top view which shows the other use example of a tightening tool. FIG. 5 is an enlarged cross-sectional view showing another embodiment of the tightening tool.

The embodiments of the present invention illustrated below will be described in detail.
1 and 2 show a detailed structure and a usage example of the tightening tool of the present invention. In this example, the framework members 1 to 3 of the framework portion where at least one column and three beams intersect are used in the present invention. It shows the case of tightening with a tightening tool.

In this case, the tightening tool is composed of a double-threaded bolt 6, nuts 7 at both ends, a washer 8 inserted into one end side of the bolt 6, and a spring unit 9 inserted into the other end side of the bolt 6.

The spring unit 9 shown in FIG. 1 is composed of a casing 11 having a cylindrical outer circumference (a square cylinder is also possible) as a whole, a bolt 6 is inserted in the center thereof, and an end portion of the bolt 6 is a nut in the casing 11. It is screwed into the portion 5. The casing 11 is interpolated into the counterbore 10 of the framework member (pillar) 1. A coil spring 13 is inserted into the casing 11, and a flange-shaped fixed spring receiver 14 through which the bolt 6 is inserted while receiving the end of the coil spring 13 is integrally fixed to the side that contacts the counterbore 10 side. ing. For this fixing, both may be fixed by any method such as welding, screwing, and press-fitting.

A flange-shaped movable spring receiver 16 is fitted or accommodated in the other end of the casing 11 so as to be slidable in the axial direction. The movable spring receiver 16 is fitted with a bolt 6 and is one of the coil springs 13. I'm catching the edge. The movable spring receiver 16 is regulated (prevented from coming off) so as not to protrude to the outside of the casing 11 by a stopper 11a protruding in a ring shape toward the inner peripheral surface side of the end of the casing 11. The coil spring 13 is elastically pressed against the stopper 11a side.

Sleeve-shaped guide cylinders 14a and 16a projecting inward along the axial center of the casing 11 are projected from the hollow inner edges of the fixed spring receivers 14 and 16, respectively, and the guide cylinders 14a and 16a are relatively relative to each other. The guide cylinders 16a on the movable spring receiver 16 side are fitted (or loosely fitted) to each other so as to be slidable in the axial direction, and the outer peripheral sides of both guide cylinders 14a and 16a and the inner peripheral side of the casing 11 are fitted to each other. A coil spring 13 is housed between the two. A nut portion 5 into which the bolt 6 is screwed is integrally provided in the guide cylinder 16a on the movable spring receiving 16 side by thread cutting.

A case where the tightening tool configured as described above is used in the state shown in FIG. 2 will be described (however, in each of the illustrated examples, the illustration is omitted for the tenon joint of the shaft assembly and the joint of the end of the wood such as the dovetail joint. doing).

Counterbore holes 10 and 12 and bolt holes 17 as shown in advance are bored in the shaft assembly members 1 and 2 at fixed positions. In the case shown by the solid line in FIG. 2, the spring unit 9 is previously provided after the shaft assembly. The attached bolt 6 is inserted through the counterbore 10 of the pillar 1, and the washer 8 and the nut 7 are attached and tightened in the counterbore 12 on the beam 2 side.

As a result, the movable spring receiver 16 is pushed into the casing 11 against the coil spring 13, but in this example, the inner end surface of the movable spring receiver 16 comes into contact with the inner end of the guide cylinder 14a on the fixed spring receiver 14 side. Further inward movement is restricted, and in this state, the adjacent wires of the coil spring 13 are held in a state where they do not come into contact with each other, and deformation and a decrease in the spring constant due to the pressure contact state are prevented.

Further, due to the above tightening, the nut portion 5 on the column 1 side is inside the casing 11 and is designed so as not to protrude from the open end of the casing 11, and even when double-threaded bolts are used, the bolt end does not protrude from the casing 11. As a result, if the counterbore 10 on the pillar 1 side or the side corresponding thereto is equal to or longer than the length L of the casing 11, the tightening metal fittings can be prevented from protruding to the surface on the pillar 1 side.
_{Explaining this with reference to the dimension display of FIG. 1, the total length of the spring unit 9 is L, the thickness of the stopper is L 1} , and the total length of the spring unit 9 is L, as well as the nut portion 5 (that is, the movable spring receiver 16) including the casing 11 and the spring receiver 14. Assuming that the thickness of the movable spring receiver 16 is L ₂ , the axial movement range of the movable spring receiver is L ₃ , and the height of the guide cylinder 14a is L ₄ , the end of the bolt 6 is always L ₁ + L regardless of before and after tightening. It is desirable that the spring material of the coil spring fits in ₂ + L ₃ in a non-contact state in _{L 4.}

The material other than the coil spring does not necessarily have to be a steel material or another metal material. By the way, in this embodiment, it is assumed that the total length of the spring unit is L = 45, the outer diameter is 48, the outer diameter of the coil spring is 39, and the wire diameter is 3 to 5 (unit is mm). The design strength may differ depending on the material, material, building size, etc., and is not limited to this.

FIG. 3 shows another usage example of the tightening tool of the present invention, in which this example is a case where three beam members 2, 3 and 3 are framed via a column 1, and a beam member on the butt side is used. The timber ends of 3 and 3 are tightened together with the pillar 1 with a tightening member, and a locking plate 18 with a wood screw 19 is screwed into the side surface of the beam member 2 intersecting in a plan view to project and fix the locking plate 18 and the locking plate 18. One of the beam members 3 is tightened.

In addition to the above, it can also be used for tightening when beam members and column members are connected in a straight line, and when beams and braces intersect at other than right angles as shown in Cited Document 1, and FRP and other synthetic resins. It can also be used for assembling the intersections of columnar members made of plastic.

In the example shown in FIG. 1, the threading process is performed only on the outer end side of the guide cylinder 16a, but only the inner end side of the guide cylinder 16a is threaded, or the threading is performed over the entire length to increase the screw length of the nut portion 5. It is also possible to do. In addition, in order to secure the screw length while reducing the screwing resistance by hand, thread cutting is performed at two places on the outer end side and the inner end side of the guide cylinder 16a, and a non-threaded part is provided in the middle part. You can also.

Further, in the illustrated example, the movable spring receiver 16 and the guide cylinder 16a are formed by cutting, but the cost can be reduced by integrally molding the movable spring receiver 16 and the guide cylinder 16a by sheet metal processing including the fixed spring receiver 14. ..

FIG. 4 shows another embodiment of the present invention. In this example, the nut on the casing 11 side in Patent Document 1 is fixed (welded) to the outer end surface of the movable spring receiver 16 to provide a fixing portion 5a, and the nut portion 5 is provided. Is integrally provided on the movable spring receiver 16 side, and other mechanisms are common to those shown in FIG. Also in this example, it is common that it is desirable to set the outer end portions of the bolt 6 and the nut portion 5 so as to fit within the total length L of the casing 11 when tightening with the bolt 6. Further, the nut portion to be fixed does not necessarily have to be a standard product such as a hexagon nut.

In each embodiment, the bolt 6 is an I-bolt type with both ends threaded, so that even if there is a deviation or difference in the depth of the counterbore holes 10 and 12 and the length between the seat surfaces. , There is an advantage that it can be dealt with by adjusting the screwing depth of the nut and the nut part.

1-3 Shaft assembly 5 Nut part 5a Fixed part 6 Bolt 7 Nut 9 Spring unit 10 Counterbore hole 11 Casing 12 Counterbore hole 13 Coil spring 14 (Fixed) Spring receiver 14a Guide cylinder 16 (Movable) Spring receiver 16a Guide cylinder 18 Locking plate 19 wood screw

Claims (3)

A fixed spring receiver (14) fixed to the casing (11) side is provided at one end of a tubular casing (11) having both ends open, and a nut portion (5) is provided in the center of the other end. A coil spring provided with a movable spring receiver (16) that can move along the direction and is prevented from coming off, and externally urges the movable spring receiver (16) between the fixed spring receiver (14) and the movable spring receiver (16). A building fastener having a bolt (6) inserted through (13) and one end screwed into the nut portion (5) and the other end protruding outward from the fixed spring receiver (14). A building fastener in which the nut portion (5) is integrally provided with the movable spring receiver (16). According to claim 1, a guide cylinder is projected from the inner surface of the central portion of the movable spring receiver (16), and a nut portion (5) is formed by screwing one end of a bolt (6) into the guide cylinder. Described building fasteners. The architectural tightening tool according to claim 1, wherein a nut is fixed to the outer surface of the movable spring receiver (16) and a nut portion (5) is provided.

Images