JP2015010348A - Steel strut - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve simplification of an inspection step and an improvement in a work environment by dispensing with welding work when a bearing plate is fixed.SOLUTION: A steel strut comprises an upside screw rod 20 that is screwed to a strut body. An upper end of the upside screw rod 20 is provided with an abutting part 24 that abuts on a peripheral edge of a through-hole 42a in an undersurface of the bearing plate 40, and a swaged part 22 that is swaged to a peripheral edge of the through-hole 42a in a top surface of the bearing plate 40.

Description

  The present invention relates to a steel bundle disposed on a foundation such as dirt concrete in a building.

  Conventionally, as a steel bundle of this type, as disclosed in, for example, Patent Document 1, a cylindrical bundle body in which a screw hole extending vertically is formed at an upper portion and a screw shaft screwed into the screw hole. There is known an operation body composed of an operation body and a support plate screwed to the upper end portion of the operation body. A through hole through which the upper side of the operation body is inserted is formed in the center portion of the support plate. A nut is welded to the lower surface of the support plate so as to coincide with the through hole. The support plate is fixed to the operating body by screwing the nut onto the operating body. The height of the support plate is adjusted by rotating the operating body with respect to the bundle body.

Japanese Patent No. 3920840

  However, in Patent Document 1, since welding is used to fix the support plate to the operating body, a welding quality inspection process is required. There is a problem that this inspection of welding quality is complicated. In addition, there is a problem that harmful working environment is generated at the time of welding and the working environment is deteriorated.

  The present invention has been made in view of such points, and the object of the present invention is to simplify the inspection process and improve the work environment by eliminating the need for welding work when fixing the support plate. is there.

  In order to achieve the above object, in the present invention, the support plate is fixed by caulking.

The first invention is
In a steel bundle installed on the foundation of a building and configured to support the building components from below,
A bundle body that extends in the vertical direction and has screw holes formed on both the upper and lower sides,
An upper threaded rod screwed into the upper threaded hole of the bundle body;
A lower screw rod screwed into the lower screw hole of the bundle body;
A support plate fixed to the upper screw rod and in contact with the constituent member;
A base plate fixed to the lower screw rod and abutting against the foundation,
A through hole through which the upper screw rod is inserted is formed in the support plate,
An upper portion of the upper screw rod is provided with a contact portion that contacts the peripheral portion of the through hole on the lower surface of the support plate, and a caulking portion that is caulked on the peripheral portion of the through hole on the upper surface of the support plate. It is characterized by being.

  According to this configuration, the upper screw shaft is inserted into the through hole of the support plate, and the support plate is brought into contact with the contact portion of the upper screw shaft with the peripheral portion of the through hole on the lower surface of the support plate. Supported by In this state, by caulking the upper end of the upper screw shaft to the periphery of the through hole on the upper surface of the support plate, the upper end of the upper screw shaft becomes the caulking portion and the upper screw shaft and the support plate are integrated. This prevents the upper screw shaft from coming off from the support plate. Therefore, it is possible to fix the support plate to the upper screw rod without performing a welding operation. Since the inspection process in the fixed state by caulking can be performed more easily than the inspection process in the welding state, the inspection process is simplified. In addition, the caulking work does not generate harmful smoke unlike the welding work, so the work environment is improved.

According to a second invention, in the first invention,
An engagement portion that engages with the caulking portion is provided at a peripheral edge portion of the through hole in the support plate.

  According to this configuration, since the caulked portion of the upper screw rod engages with the peripheral edge portion of the through hole of the support plate, when the rotational force around the center line of the upper screw rod is applied to the support plate, the support plate Can be prevented.

According to a third invention, in the second invention,
The engaging portion is a protrusion protruding upward from the upper surface of the support plate.

  According to this configuration, since the protrusion of the support plate bites into the caulked portion of the upper screw rod, the effect of preventing rotation of the support plate is further enhanced while the configuration is simple.

According to a fourth invention, in any one of the first to third inventions,
The base plate is formed with a through hole through which the lower screw rod is inserted,
At the lower portion of the lower screw rod, there are a contact portion that contacts the peripheral portion of the through hole on the upper surface of the base plate, and a caulking portion that is caulked on the peripheral portion of the through hole on the lower surface of the base plate. It is provided.

  According to this configuration, the lower screw shaft is inserted into the through hole of the base plate, and the lower side of the through hole on the upper surface of the base plate is in contact with the contact portion of the lower screw shaft. By caulking the lower end of the screw shaft to the peripheral edge of the through hole in the lower surface of the base plate, the lower end of the lower screw shaft becomes the caulking portion, and the lower screw shaft and the base plate are integrated into the lower side. The screw shaft is prevented from coming off the base plate. Therefore, it is possible to fix the base plate to the lower screw rod without performing a welding operation.

  According to the first invention, when the upper screw rod and the lower screw rod are screwed to the bundle body, the support plate is fixed to the upper screw rod, and the base plate is fixed to the lower screw rod, the upper screw The upper part of the bar is provided with a contact part that contacts the peripheral part of the through hole on the lower surface of the support plate and a caulking part that is caulked to the peripheral part of the through hole on the upper surface of the support plate. Welding work can be made unnecessary when fixing to the rod. Thereby, the inspection process can be simplified and the work environment can be improved.

  According to the second aspect of the invention, since the engagement portion that engages the caulking portion of the upper screw rod is provided at the peripheral portion of the through hole in the support plate, the support plate rotates around the center line of the upper screw rod. Can be prevented.

  According to the third aspect of the invention, since the engaging portion of the support plate is a projection, the effect of preventing the rotation of the support plate can be further enhanced with a simple configuration.

  According to the fourth invention, since the welding work can be made unnecessary when fixing the base plate to the lower screw rod, the inspection process can be simplified and the work environment can be improved.

It is a perspective view of the steel bundle which concerns on embodiment of this invention. It is a side view of a steel bundle. It is a top view of a steel bundle. It is a longitudinal cross-sectional view of a support plate and an upper screw rod. It is a longitudinal cross-sectional view of a base plate and a lower screw rod. It is a top view of a support plate. FIG. 5 is a view corresponding to FIG. 4 before caulking and fixing.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

  FIG. 1 is a perspective view of a steel bundle 1 according to an embodiment of the present invention, and FIG. 2 is a side view of the steel bundle 1. The steel bundle 1 is installed on a foundation part A of a building such as soil concrete (shown in phantom lines in FIG. 2), for example, and is drawn as a structural member of the building by a large line B (in FIG. 2 with phantom lines). (Shown) is supported from below.

  The steel bundle 1 includes a bundle body 10 extending in the vertical direction, an upper screw rod 20 attached to the upper side of the bundle body 10, a lower screw rod 30 attached to the lower side of the bundle body 10, and the upper screw rod 20. A support plate 40 to be fixed and a base plate 50 to be fixed to the lower screw rod 30 are provided. These members are all made of steel.

  The bundle body 10 is formed in a cylindrical shape. The upper part and the lower part of the bundle body 10 are formed with a smaller diameter than the intermediate part in the vertical direction. An upper screw hole 11 and a lower screw hole 12 extending in the vertical direction are formed in the upper and lower inner surfaces of the bundle body 10, respectively. The upper end portion of the upper screw hole 11 opens at the upper end portion of the bundle body 10. The lower end portion of the lower screw hole 12 is open to the lower end portion of the bundle body 10. The upper screw hole 11 and the lower screw hole 12 are reverse screws.

  An intermediate portion in the vertical direction of the bundle body 10 is a square tube portion 13. The bundle body 10 can be rotated by engaging a tool (not shown) with the square tube portion 13.

  As shown in FIGS. 3 and 4, the support plate 40 is formed by bending so as to extend substantially obliquely from the side edges of the flat plate portion 41 and the substantially rectangular flat plate portion 41 extending substantially horizontally along the large pull B. Bending portions 43 and 43 and a bulging portion 42 formed so as to bulge downward at the center of the flat plate portion 41 are provided. The bottom surface of the bulging portion 42 is formed to be substantially flat and has a circular shape when viewed from above. As shown in FIG. 6, a circular through hole 42 a through which the upper screw rod 20 is inserted is formed on the bottom surface of the bulging portion 42. On the upper surface of the support plate 40, a plurality of protrusions 42b, 42b,... Projecting upward are formed at the peripheral edge of the through hole 42a. These protrusions 42b, 42b,... Are engaging portions that engage with a caulking portion 22 of the upper screw rod 20 described later.

  As shown in FIG. 4, the upper screw rod 20 has a screw shaft 21 that is screwed into the upper screw hole 11 of the bundle body 10, a caulking portion 22 that is caulked to the support plate 40, and an abutment that abuts the support plate 40. Part 24. The screw shaft 21 is set to a diameter that can be inserted into the through hole 42 a of the support plate 40. The height of the support plate 40 can be changed depending on the amount of screwing of the screw shaft 21 into the upper screw hole 11.

  The caulking portion 22 is a portion caulked to the peripheral edge portion of the through hole 42 a on the upper surface of the support plate 40. That is, as shown in FIG. 7, the cylindrical portion 25 is integrally formed with the screw shaft 21 at the upper end portion of the upper screw rod 20 before caulking. The cylindrical part 25 becomes the caulking part 22 by applying a processing force to the cylindrical part 25 from above and plastically deforming it. The caulking portion 22 has a substantially circular shape that is larger than the through hole 42a when viewed from above. The protrusions 42b, 42b,... Of the support plate 40 are engaged with the caulking portion 22 in a state of being bitten. The caulking portion 22 is accommodated in the bulging portion 42 of the support plate 40, and the upper end portion of the caulking portion 22 does not protrude upward from the bulging portion 42 in this state.

  The abutting portion 24 is located below the caulking portion 22 and is formed so as to protrude in the radial direction of the screw shaft 21 and extend annularly in the circumferential direction. The contact portion 24 supports the support plate 40 from below by contacting the peripheral portion of the through hole 42 a on the lower surface of the support plate 40. Therefore, the contact portion 24 and the caulking portion 22 are separated in the vertical direction by the thickness of the support plate 40.

  As shown in FIGS. 1 and 2, the upper lock nut 60 is screwed onto the screw shaft 21 of the upper screw rod 20. An upper spring washer 61 is disposed between the upper lock nut 60 and the upper end portion of the bundle body 10.

  The base plate 50 includes a substantially rectangular flat plate portion 51 extending substantially horizontally along the base portion A, and a bulging portion 52 formed so as to bulge upward at the center of the flat plate portion 51. . The upper surface of the bulging portion 52 is formed to be substantially flat and has a circular shape when viewed from above. As shown in FIG. 5, a circular through hole 52 a through which the lower screw rod 30 is inserted is formed on the upper surface of the bulging portion 52. On the lower surface of the base plate 50, a plurality of projections 52b, 52b,... Projecting downward are formed on the peripheral edge of the through hole 52a. These protrusions 52b, 52b,... Are engaging portions that engage with a caulking portion 32 of a lower screw rod 30, which will be described later.

  The lower screw rod 30 includes a screw shaft 31 that is screwed into the lower screw hole 12 of the bundle body 10, a caulking portion 32 that is caulked to the base plate 50, and an abutting portion 34 that abuts the base plate 50. doing. The screw shaft 31 is set to a diameter that can be inserted into the through hole 52 a of the base plate 50. The height of the support plate 40 can be changed by the amount of screwing into the lower screw hole 12 of the screw shaft 31.

  The caulking portion 32 is a portion caulked to the peripheral edge portion of the through hole 52 a on the lower surface of the base plate 50. Although not shown, before caulking, it is cylindrical like the upper screw rod 20.

  The abutting portion 34 is located above the caulking portion 32 and is formed so as to protrude in the radial direction of the screw shaft 31 and extend annularly in the circumferential direction. The contact portion 34 prevents the base plate 50 from moving upward by contacting the peripheral edge portion of the through hole 52 a on the upper surface of the base plate 50. Therefore, the contact portion 34 and the caulking portion 32 are separated in the vertical direction by the thickness of the base plate 50.

  As shown in FIGS. 1 and 2, a lower lock nut 62 is screwed onto the screw shaft 31 of the lower screw rod 30. A lower spring washer 63 is disposed between the lower lock nut 62 and the lower end of the bundle body 10.

  Next, the case where the steel bundle 1 comprised as mentioned above is manufactured is demonstrated. When the support plate 40 is fixed to the upper screw rod 20, first, the upper screw rod 20 having the shape before caulking shown in FIG. Then, the upper end portion of the upper screw rod 20 is inserted into the through hole 42 a of the support plate 40. Then, the support plate 40 contacts the contact portion 24 of the upper screw rod 20 and is supported from below. In this state, the cylindrical portion 25 is caulked portion 22 by plastically deforming the cylindrical portion 25 of the upper screw rod 20 by applying a processing force from above. As a result, the support plate 40 is sandwiched between the contact portion 24 and the caulking portion 22 and fixed to the upper screw rod 20. In the fixed state, the protrusion 42 b of the support plate 40 bites into the caulking portion 22, so that the support plate 40 does not rotate around the center line of the upper screw rod 20.

  Similarly, the base plate 50 is fixed to the lower screw rod 30 by caulking the lower screw rod 30.

  Then, the upper lock nut 60 is screwed into the upper screw rod 20 and the upper spring washer 61 is inserted to screw the screw shaft 21 of the upper screw rod 20 into the upper screw hole 11 of the bundle body 10. Further, the lower lock nut 62 is screwed into the lower screw rod 30 and the lower spring washer 63 is inserted, and the screw shaft 31 of the lower screw rod 30 is screwed into the lower screw hole 12 of the bundle body 10. Let

  The steel bundle 1 is obtained as described above. When the steel bundle 1 is used, the height of the support plate 40 can be adjusted by rotating the bundle body 10.

  Therefore, according to the steel bundle 1 according to this embodiment, the upper threaded rod 20 and the lower threaded rod 30 are screwed to the bundle body 10, the support plate 40 is fixed to the upper threaded rod 20, and the lower thread When the base plate 50 is fixed to the rod 30, the upper portion of the upper screw rod 20, the contact portion 24 that contacts the peripheral portion of the through hole 42 a on the lower surface of the support plate 40, and the through hole 42 a on the upper surface of the support plate 40. Since the caulking portion 22 that is caulked on the peripheral edge of the upper plate is provided, welding work can be eliminated when the support plate 40 is fixed to the upper screw rod 20. Thereby, the inspection process can be simplified and the work environment can be improved.

  Further, since the protrusion 42b that engages the caulking portion 22 of the upper screw rod 20 is provided at the peripheral edge portion of the through hole 42a in the support plate 40, the support plate 40 can be configured with the center line of the upper screw rod 20 with a simple configuration. Rotation around can be prevented.

  Further, since the welding work can be made unnecessary when the base plate 50 is fixed to the lower screw rod 30, the inspection process can be simplified and the work environment can be improved.

  In the above embodiment, the protrusion 42b is provided on the peripheral edge of the through hole 42a in the support plate 40 to prevent the support plate 40 from rotating. However, the present invention is not limited to this, for example, the peripheral edge of the through hole 42a. It is also possible to provide a recess in the crimping portion 22 to engage the recess.

  The above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  As described above, the steel bundle according to the present invention can be used, for example, for the foundation of a detached house.

DESCRIPTION OF SYMBOLS 1 Steel bundle 10 Bundle body 11 Upper screw hole 12 Lower screw hole 20 Upper screw rod 22 Caulking part 24 Abutting part 30 Lower screw rod 32 Caulking part 34 Abutting part 40 Support plate 42a Through hole 42b Protrusion (engagement) Part)
50 Base plate 52a Through hole

Claims (4)

In a steel bundle installed on the foundation of a building and configured to support the building components from below,
A bundle body that extends in the vertical direction and has screw holes formed on both the upper and lower sides,
An upper threaded rod screwed into the upper threaded hole of the bundle body;
A lower screw rod screwed into the lower screw hole of the bundle body;
A support plate fixed to the upper screw rod and in contact with the constituent member;
A base plate fixed to the lower screw rod and abutting against the foundation,
A through hole through which the upper screw rod is inserted is formed in the support plate,
An upper portion of the upper screw rod is provided with a contact portion that contacts the peripheral portion of the through hole on the lower surface of the support plate, and a caulking portion that is caulked on the peripheral portion of the through hole on the upper surface of the support plate. Steel bundle characterized by being made. The steel bundle according to claim 1,
A steel bundle, wherein an engagement portion that engages with the caulking portion is provided at a peripheral edge portion of the through hole in the support plate. The steel bundle according to claim 2,
The steel bundle, wherein the engaging portion is a protrusion protruding upward from the upper surface of the support plate. In the steel bundle as described in any one of Claim 1 to 3,
The base plate is formed with a through hole through which the lower screw rod is inserted,
At the lower portion of the lower screw rod, there are a contact portion that contacts the peripheral portion of the through hole on the upper surface of the base plate, and a caulking portion that is caulked on the peripheral portion of the through hole on the lower surface of the base plate. A steel bundle characterized by being provided.

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