JP2000129910A - Wall tie mounting bolt for sacaffold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an art to keep a caulking section and the tightness of a long nut to a drill tap type screw shaft unloosened even if force is applied in the direction opposite to the screw direction and repeated stress is given. SOLUTION: This wall tie mounting bolt for scaffolds comprises a long nut 2 screwing the male screw of a wall tie for scaffolds to one end side and a drill tap type screw shaft 3 screwed to the other end of the long nut 2. The drill tap type screw shaft 3 has a flange-shaped stopper 16, which is installed between a male screw section 14 concurrently used as a tap and a male screw section 15 on the long nut screwing side and axially provided with a proper thickness, and the long nut 2 is provided with a rotation preventive section 4 which is formed by caulking the outer peripheral section on one end side of the long nut 2 along the outer periphery of the hexagonal flange-shaped stopper 16 with a part of the flange-shaped stopper stored in the nearly cylindrical recessed section 19 which was provided on one end beforehand.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scaffold wall tether mounting bolt, and more particularly to a scaffold wall tether mounting bolt that prevents trouble when the scaffold is disassembled.

[0002]

2. Description of the Related Art When constructing a building or repairing the building, a temporary scaffolding around the building has been used in order to allow workers to work at heights safely. Conventionally, such temporary scaffolds are built up by adding fixed-length pipes with connecting metal fittings, but to prevent collapse due to buckling or wind load, or to prevent rocking, building Connect to the side. However, in this case, the connection to the building side must not interfere with the construction of the building and must not damage the outer wall. FIG. 10 shows a main part of the wall connection structure in the temporary scaffold. In the figure, 50 is a rim made of angle iron, lightweight channel steel, etc., 51 is an outer wall material fixed by using the rim 50, 52 Are joints between the outer wall materials 51. The temporary scaffolding side is connected to the building via the wall connecting fitting 53, but its location is very limited, such as at joints. The connecting end side of the wall connecting fitting 53 is a bolt having a large shaft diameter, and the shaft end has no drilling ability. In this case, a scaffolding wall connecting mounting bolt 54 is used.

[0003] As shown in FIG. 11, the scaffold wall tether mounting bolt 54 is provided with a male screw 53 of a wall tether 53.
a on the one end side of the nut,
The female screw portion 55 is coaxial with the female screw portion 55a.
a long nut 55 having a female screw portion 55b formed on the other end of the nut, a tapping male screw portion 56b having a steel material piercing portion 56a at its tip and being screwed into the hole after piercing while being threaded 50a; The male screw portion 56c for screwing the tapping male screw portion 56b to the other end female screw portion 55b of the long nut 55 is connected to the tapping male screw portion 56.
bDrill tap type screw shaft 56 integrally extended from the end
, Is provided. Then, the scaffold wall tether mounting bolt 54 grasps the long nut 55 with a rotating tool, and drills the drill tap type screw shaft 56 from the joint 52 at a predetermined position.
Is inserted, and the steel material perforated portion 56a is rotated in a state where the steel material perforated portion 56a is in contact with the body edge 50. First, a pilot hole having the outer diameter is opened, and the tapping male screw portion 56b is prepared. It is screwed in while tapping the tap, and is firmly screwed to the body edge 50.
After that, the temporary scaffold can be firmly connected to the building by screwing the male screw portion 53a of the wall connection fitting 53 to the female screw portion 55a of the long nut. When the temporary scaffold is dismantled, it is performed in substantially the reverse steps. As described above, the scaffold wall tether mounting bolt 54 is provided with the drill tap type screw shaft 5 with strong rotational force via the long nut 55.
6 is screwed into the waist edge 50 and unscrewed, so that only the long nut 55 does not idle, as shown in FIG.
The outer surface of the long nut is punched, and the male screw portion 56c is caulked to provide a detent 57.

[0004]

In such a scaffolding wall tether mounting bolt, a perforated portion 56 without a pilot hole in the rim 50 is provided.
a, and the tapping male screw portion 56b is screwed in while tapping up the tap. Therefore, the drill tap type screw shaft 56 used is one that has been subjected to heat treatment such as carburizing and quenching and has become very hard. ing. However, with the conventional scaffold wall tether mounting bolts, the long nut outer peripheral surface is punched and the male screw portion is caulked,
Although the area around the male thread is tight, the thread is not crushed or pressed against the nut material.
There has been a problem that there is a case in which only the long nut loosens while receiving the unwinding force or the repetitive stress, causing only the long nut to idle, and unscrewing of both is impossible. In addition, if punching is strengthened in order to make the detent hard, there arises a problem that the axis of the drill tap type screw shaft 56 and the long nut 55 becomes out of alignment and cannot be used with an electric rotary tool.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a long nut and a drill tap type screw shaft even when a screw return direction force or repeated stress is applied. An object of the present invention is to provide a scaffold wall tether mounting bolt which does not loosen each other and has high accuracy.

[0006]

According to a first aspect of the present invention, there is provided a scaffolding wall tether mounting bolt according to the present invention, wherein a female screw part for screwing a male screw part of the scaffolding wall tether is provided on one end side of the nut body. A long nut having a female thread on the other end side of the nut main body having a female thread formed on the same axis as the female thread and having a smaller diameter than the female thread; A tapping male screw portion which is screwed while being tapped, and a drill tap type screw shaft integrally provided with a male screw portion extending from an end of the tapping male screw portion and screwed to the female screw portion on the other end side of the long nut. In the scaffold wall tether mounting bolt, the drill tap type screw shaft has an uneven surface or a notch surface displaced in the outer peripheral direction between the tap combined male screw portion and the long nut screw side male screw portion. Establishment A flange-shaped stopper is integrally provided, and at least another part in the thickness direction of the flange-shaped stopper is stored in a substantially cylindrical recess provided in advance on the same axis as the female screw portion on the other end side of the long nut. In such a state, at least a part of the outer peripheral portion on one end side of the long nut is provided with a detent portion formed by caulking until the outer peripheral portion is along the uneven surface or the notched surface.

According to a second aspect of the present invention, there is provided the scaffold wall tether mounting bolt according to the first aspect, wherein the flange-like stopper is formed in a hexagonal nut shape, and the detent portion is provided with a long nut or the like. The end side outer peripheral portion is further formed by caulking into a small hexagonal nut shape.

According to a third aspect of the present invention, in the scaffold wall tether mounting bolt according to the first aspect, the flange-shaped stopper is formed in a hexagonal nut shape, and the detent portion is provided with a long nut. It is characterized by being formed by punching an end outer peripheral portion toward the outer periphery of the flange-shaped stopper.

[0009]

In the scaffold wall tether mounting bolt according to the first aspect of the present invention, one end of the long nut is gripped with a rotary tool, and the tapping male screw portion of the drill tap type screw shaft is screwed into the body edge at a predetermined position. At this time, the male screw portion of the drill tap type screw shaft is tightened with respect to the female screw portion of the long nut. Also,
Regarding the screw return direction, since the part of the outer periphery of the long nut is caulked until it conforms to the uneven surface or notch surface provided on the outer periphery of the flange-shaped stopper, when the screw shaft of the drill tap type screw is unscrewed, The crimped portion of the nut abuts the uneven surface or the notched surface of the flange-shaped stopper in the loosening direction of the male screw portion, thereby preventing the drill tap type screw shaft from loosening from the long nut. The crimping portion may receive the surface facing the screw-rotation side rotation direction of the uneven surface or the notch surface at the outer peripheral position of the flange-shaped stopper, and an excessive deformation method such that the axial center of the long nut and the male screw portion is displaced from each other. Since this structure becomes unnecessary, by adopting this structure, it is possible to obtain a precise scaffolding wall connecting bolt having the same axis.

In the scaffold wall tether mounting bolt according to the second aspect, since the outer peripheral side of the flange-shaped stopper stored in the recess is first crimped into a hexagonal nut shape, the flange-shaped stopper having the hexagonal nut-shaped outer shape is It will be fixed uniformly over the entire circumference. An effective rotation stop can be performed in any rotation direction of the scaffold wall tether mounting bolt. Further, it is possible to manufacture an accurate product without misalignment between the drill tap type screw shaft and the long nut.

In the scaffold wall tether mounting bolt according to the third aspect, since the outer periphery of the long nut is punched so that the angular side surface of the flange-shaped stopper abuts in the rotation direction, an excessive amount of displacement of the shaft center is required. It is formed so that the outer periphery of the flange-shaped stopper can be accurately received without applying force, so that it can be securely fixed. The punching machine can be a conventional one.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a plan view showing a scaffold wall tether mounting bolt of the present embodiment, FIG. 2 is a bottom view thereof, FIG. 3 is a front view thereof, FIG. 4 is a rear view thereof, and FIG. (B) is a right side view of the same, FIG. 6 is a sectional view taken along line AA of FIG. 1, and FIG. 7 is a sectional view taken along line BB of FIG. In addition, about the structure of a wall connection and a building, FIG.
Use the code described in.

First, the structure will be described. The scaffold wall tether mounting bolt 1 of the first embodiment comprises a long nut 2,
The drill tap type screw shaft 3 and the detent part 4 are main components. The long nut 2 has a female screw portion 11 on one end side of the nut body for screwing the male screw portion 53a of the scaffold wall connection fitting 53, and has a smaller diameter than the female screw portion 11 on the same axis as the female screw portion 11. Female screw part 1 formed in
2 is formed on the other end side of the nut main body and has six surfaces.

The drill tap type screw shaft 3 has a steel material drilling portion 13 at its tip and is screwed into the hole after drilling while being screwed up 50a, and the tapping male screw portion 14 is connected to the long nut. In order to protrude from the other end of the male screw 2, a male screw 15 to be screwed to the female screw 12 on the other end of the nut is integrally extended from the end of the male screw 14 serving also as a tap. A hexagon nut having an appropriate thickness in the axial direction between the tapping male screw portion 14 and the male screw portion 15 screwed to the female screw portion 12 of the long nut is provided on the drill tap type screw shaft 3. It has a mold flange-shaped stopper 16 integrally.

The anti-rotation portion 4 has an inner diameter slightly larger than the maximum outer dimension of the flange-shaped stopper 16 and a depth slightly shallower than the thickness of the flange in the long nut 2 on the same axis as the female screw portion 12 in advance. In a state where a part of the flange-shaped stopper 16 in the thickness direction is stored in a substantially cylindrical concave portion 19 provided on one end side of the nut with
The outer peripheral portion of the one end side of the nut is provided by being crimped in a hexagonal shape so as to be along the outer periphery of the flange-shaped stopper 16, that is, along the hexagonal surface 17. In the figure, reference numeral 18 denotes the hexagonal caulked portion. In addition, the said substantially cylindrical concave part 19 is
It indicates a portion that has already been deformed into a hexagon by this caulking action. In the figure, reference numeral 20 denotes a rubber cushion,
When the scaffold wall connecting bolt 1 is attached through the wall material or when the joint is narrow, the wall material is prevented from being damaged by contact with the metal surface or excessive tightening.

Next, the operation will be described. In the scaffold wall tether mounting bolt 1, one end of the long nut 2 is gripped with a rotary tool, and the tap / male thread portion 14 of the drill tap type screw shaft 3 is inserted from a joint 52 at a predetermined position. Is rotated in a state of contact, firstly, a pilot hole is opened by its outer diameter, and by pressing it as it is to continue the rotation, the tap / male thread part 14 firmly inserts the tap into the pilot hole 50a while standing. It will be screwed. Thereafter, the male thread portion 53a of the wall tie 53 is screwed into the female screw portion 11 of the long nut, thereby fixing the wall tie 53 to the trunk side, and the temporary scaffold can be firmly connected to the building. .

The male thread portion 1 of the drill tap type screw shaft 3
Numeral 5 is a tightening side with respect to the female screw portion 12 of the long nut 2 and does not loosen. Regarding the screw return direction, the flange-shaped stopper 16 of the rotation preventing portion 4 is stored in the concave portion 19 on the other end side of the long nut, and in this state, the nut outer peripheral portion is formed on a hexagonal surface provided on the outer periphery of the flange-shaped stopper 16. When the drill tap type screw shaft 3 is unscrewed, the caulking portion 18 of the long nut abuts against the hexagonal surface of the flange-like stopper 16 in the loosening direction of the male screw portion 15 to prevent idling when the drill tap type screw shaft 3 is unscrewed. However, the drill tap type screw shaft 3 is prevented from loosening from the long nut 2.

As described above, in the scaffold wall tether mounting bolt 1 according to the first embodiment, the hexagon nut type flange stopper 16 of the drill tap type screw shaft 3 is
Since it is fixed to the hexagonal crimped detent part 4,
Even if a force in the unscrewing direction or repeated stress acts, the unscrewing portion is not loosened, and the unscrewing can be surely performed. The caulking portion 18 only needs to receive an uneven surface or a notch surface facing the screw-rotation side rotation direction at the outer peripheral position of the flange-shaped stopper 16, and excessive deformation such that the axes of the long nut 2 and the male screw portion 12 are shifted from each other. A method is not required, and a precise scaffolding wall connecting bolt having the same axis can be obtained.

Next, a scaffold wall connecting bolt according to a second embodiment will be described. Note that, in the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and a specific description thereof will be omitted. FIG. 8 is a front view showing a scaffold wall tether mounting bolt according to the second embodiment, and FIG. 9 is a cross-sectional view showing a detent portion. The scaffold wall tether mounting bolt 5 of the present embodiment is characterized in that the surface of the long nut 2 is punched to provide a detent portion 6. 21 in the figure
Is a punch mark, and 22 is a swaged portion protruding into the recess 19 by this punching. In the scaffold wall tether mounting bolt 5 configured as described above, the outer periphery of the long nut 2 is punched as in the related art, but provided so that the caulked portion abuts in the rotation direction of the outer peripheral uneven surface of the flange-shaped stopper 16. Therefore, the outer periphery of the flange-shaped stopper 16 can be accurately received and securely fixed without applying an excessive force for displacing the shaft center. Further, a conventional punching machine can be used.

Although the embodiments of the present invention have been described above, the specific configuration of the present invention is not limited to the embodiments, and there may be design changes and the like within a range not departing from the gist of the invention. This is also included in the present invention. For example, although the flange-like stopper 16 is formed in a hexagonal nut shape, the present invention is not limited to this, and may be a polygonal shape such as a quadrangle, or a circular shape with a cutout provided in a part of the outer periphery. The crimping shape of the outer periphery of the long nut is also arbitrary. When caulking with a punching machine, not only one but also a plurality of locations can be provided.

[0021]

As described above, in the scaffold wall tether mounting bolt according to the first aspect of the present invention, because of the above-mentioned structure, the detent portion formed by caulking the outer periphery of the long nut completely covers the flange-shaped stopper. The long nut and the drill tap-type screw shaft can be reliably screwed back at all times without the caulking portion becoming loose even when a screw return direction force or repeated stress acts. In addition, an excessive deformation method in which the axes of the long nut and the external thread are shifted from each other is not required, and effects such as the production of a precise scaffolding wall connecting bolt having the same axis can be obtained.

According to the second aspect of the present invention, since the scaffold wall tether mounting bolt is configured as described above, it is possible to effectively prevent rotation in any rotational direction of the drill tap type screw shaft. An effect is obtained such that a product with high accuracy without misalignment between the drill tap type screw shaft and the long nut can be manufactured.

According to the third aspect of the present invention, since the scaffold wall tether mounting bolt is configured as described above, punching is performed so that the angular side surfaces of the flange-shaped stopper abut in the rotational direction at the same position as in the related art. The outer periphery of the flange-shaped stopper can be accurately received and securely fixed without applying an excessive force for displacing the shaft center. In addition, the punching machine can use a conventional one, and has the effect of being economical.

[Brief description of the drawings]

FIG. 1 is a plan view showing a scaffold wall tether mounting bolt according to a first embodiment.

FIG. 2 is a bottom view showing the same scaffold wall tether mounting bolt.

FIG. 3 is a front view showing the same scaffold wall tether mounting bolt.

FIG. 4 is a rear view showing the same scaffold wall tether mounting bolt.

FIG. 5A is a left side view showing the same scaffold wall tether mounting bolt. (B) It is a right side view showing the same scaffold wall tether mounting bolt.

FIG. 6 is a sectional view taken along line AA of FIG.

FIG. 7 is a sectional view taken along line BB of FIG. 1;

FIG. 8 is a plan view showing a scaffold wall tether mounting bolt according to the second embodiment.

FIG. 9 is a cross-sectional view illustrating a rotation preventing portion according to the second embodiment.

FIG. 10 is an explanatory view showing a usage state of a conventional scaffold wall tether mounting bolt.

FIG. 11 is a cross-sectional view showing a conventional scaffold wall tether mounting bolt.

[Explanation of symbols]

 1,5 Scaffolding wall connecting bolt 2 Long nut 3 Drill tap type screw shaft 4,6 Detent part 11 Long nut wall connecting connecting side female screw portion 12 Long nut drill tap type screw shaft side female screw portion 13 Steel drilling portion Reference Signs List 14 Male threaded part for tap 15 Male threaded part on long nut mounting side of drill tap type screw shaft 16 Flange stopper 18 Caulking part 19 Cylindrical concave part of long nut 21 Punching 22 Caulking part by punching 53 Wall scaffolding for scaffolding )

Claims (3)

[Claims] An internal thread for screwing an external thread of a scaffold wall connection is provided on one end side of a nut body, and an internal thread formed on the same axis as the internal thread and having a smaller diameter than the internal thread is connected to a nut. A long nut provided at the other end of the main body, a tap / male screw portion having a steel material drilling portion at the tip and screwed into the hole after drilling and screwed into the hole after drilling, and a long nut extending from the end of the tap / male screw portion. A drill tap type screw shaft integrally provided with a male screw portion screwed to the other end side female screw portion; a scaffolding wall tether mounting bolt, comprising: the drill tap type screw shaft; A flange-shaped stopper integrally provided with an uneven surface or a cutout surface displaced in the outer peripheral direction between the long nut screw side male screw portion and the same end as the female screw portion on the other end side of the long nut On the axis With at least a part of the flange-shaped stopper in the thickness direction stored in a substantially cylindrical recess provided in advance, at least a part of the outer peripheral portion on one end side of the long nut is made to conform to the uneven surface or the notched surface. A scaffolding wall tether mounting bolt having a swaged detent portion. 2. The method according to claim 1, wherein the flange-shaped stopper is formed in a hexagonal nut shape, and the rotation preventing portion is formed by caulking an outer peripheral portion on the other end side of the long nut into a smaller hexagonal nut shape. Item 2. A scaffold wall tether mounting bolt according to Item 1. 3. The method according to claim 1, wherein the flange-shaped stopper is formed in a hexagonal nut shape, and the detent is formed by punching an outer peripheral portion of the other end of the long nut toward the outer periphery of the flange-shaped stopper. The scaffold wall tether mounting bolt according to claim 1.