JP3020892U - Stepping device in steel structure - Google Patents

Abstract

(57) [Summary] [Purpose] In angle steel towers and steel structures such as outdoor steel structures, a stepping device that can secure a foothold when climbing towers and store it when not in use to prevent the climbing of ordinary people provide. [Structure] A bracket metal fitting (3) attached to a steel frame (2) of a structure, and a step metal fitting (4) pivotally attached to the bracket metal fitting so as to be rotatable between a substantially horizontal posture and a substantially upright posture. ) And step bracket (4)
A stopper means (19) for supporting and supporting the tool in a state in which it is rotated from a substantially upright position to a substantially horizontal position, and a lock which is non-rotatably fixed while the step fitting (4) is rotated in the substantially upright position. This is a structure provided with means (18).

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a stepping device for a steel structure such as an angle transmission tower for power transmission and an outdoor steel structure installed in a substation or a power plant.

[0002]

[Prior art]

 Conventionally, step bolts have been attached to angle steel towers for power transmission and steel structures such as outdoor steel structures installed in substations or power plants so that workers can ascend the tower for maintenance and inspection.

That is, step bolts are arranged at predetermined intervals in the steel frame of the structure, and each step bolt is inserted into a bolt hole formed in the steel frame and fastened with a nut. Therefore, the worker can climb the tower by using the shaft portion of the bolt protruding from the steel frame as a scaffold.

[0004]

[Problems to be solved by the device]

 By the way, in the conventional technique, if the step bolt is left in a state in which it is fastened to the steel frame, the general public may be interested and climb the tower, which may cause an accident. For this reason, the current situation is that the worker removes the step bolt after the work is completed so that the public cannot rise to the tower.

However, if the step bolt is removed as described above, the step bolt must be attached again when the ascending tower is required again for maintenance inspection and the like, which is troublesome and complicated. Is. If a worker neglects to carry the step bolt, he cannot return to the tower because he cannot climb the tower, which reduces work efficiency.

Further, the conventional step bolt has a problem that it spoils the aesthetic appearance of a steel frame structure such as an outdoor steel structure.

[0007]

[Means for Solving the Problems]

 The present invention provides a step device that simultaneously solves the problems of securing a scaffold when climbing towers and preventing the rise of ordinary people in angle steel towers and steel structures such as outdoor steel structures.

Therefore, the present invention is configured as a means, that is, a mounting portion to be mounted on a steel frame of a structure, and a bracket metal member having an arm portion protruding from the mounting portion; a substantially horizontal posture with respect to the arm portion. And a step metal fitting having a scaffolding portion extending from the support portion, which is pivotally mounted so as to be rotatable in a substantially standing position, and the step fitting is substantially horizontal from the standing position. In the state of being rotated to the posture, the support portion constitutes the stopper means which is supported by the mounting portion to maintain the substantially horizontal posture, and the step fitting is rotated from the substantially horizontal posture to the substantially upright posture. The point is that a locking means is provided to fix the step fitting so that it cannot rotate.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION

 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 (A) and 1 (B), the step device 1 is mounted on a steel frame 2 of an angle steel tower for power transmission or a steel frame structure such as an outdoor steel structure provided at a substation or a power station. And a step metal fitting 4 pivotally attached to the bracket metal fitting 3.

The bracket metal fitting 3 includes a mounting portion 5 mounted on the steel frame 2 and mounted thereon, and an arm portion 6 protruding from the mounting portion 5. For example, as shown in the drawing, by bending a steel plate into an L-shape, the bracket metal fitting 3 including the mounting portion 5 and the arm portion 6 can be configured.

The mounting portion 5 is inserted with a mounting bolt 7 in a state of being overlapped with the surface of the steel frame 2, and the double nuts 8 and 9 are fastened to the insertion end of the bolt 7 on the opposite surface side of the steel frame 2. By doing so, it is firmly attached and fixed.

The step fitting 4 includes a support portion 10 pivotally attached to the arm portion 6 of the bracket fitting 3 and a scaffold portion 11 extending from the support portion 10. For example, the step fitting 4 can be configured by forming the support portion 10 with a steel plate, forming the scaffold portion 11 with the screwless bolts 12, and welding 13 the screwless bolts 12 to the support portion 10. it can.

The support portion 10 has a pivot bolt 15 inserted through the arm portion 6 of the bracket 3 with a washer 14 interposed therebetween, and a nut 16 is loosely tightened at an insertion end of the bolt 15. I'm wearing it. In order to enable this loose structure, the pivot bolt 15 has a shaft end portion 15a extending beyond the nut 16, and a nut disengagement prevention means 17 including a split pin or a C ring is provided near the shaft end. ing. Therefore, the nut 16 is tightened between the threaded portion of the pivot bolt 15 and the arm portion 6 of the bracket metal fitting 3 and the loosened state in which the nut 16 is loosened in the direction of the nut drop prevention means 17. It can be screwed and retracted, and constitutes a locking means 18 described later.

The step fitting 4 is rotatable about the pivot bolt 15 as a support shaft between a substantially horizontal posture and a substantially upright posture, and as shown in FIG. In the moved state, the support portion 10 constitutes a stopper means 19 which is supported by the mounting portion 5 of the bracket metal fitting 3. That is, in this horizontal posture, the plate edge of the mounting portion 5 located below the axis of the pivot bolt 15 forms the stopper means 19, and the stopper means 19 is supported by the mounting portion 5 to support the stopper means 19. Prevent the step fitting 4 from rotating downward. Therefore, the load of the operator acting on the scaffolding 11 is supported by the pivot bolt 15 and the stopper means 19 to maintain the horizontal position of the step fitting 4.

On the other hand, as shown in FIG. 2, the step fitting 4 is rotatable about a pivot bolt 15 as a support shaft so as to be in a substantially upright posture. That is, as a result, a storage state in which the scaffolding portion 11 is placed along the steel frame 2 is obtained. Therefore, when the nut 16 which constitutes the locking means 18 is fastened to the pivot bolt 15, the step fitting 4 is firmly fixed in the retracted state in the standing posture. Therefore, unless the nut 16 is loosened with a tool such as a wrench, the step fitting 4 cannot be rotated horizontally.

The non-screw bolt 12 constituting the scaffolding portion 11 of the step fitting 4 is provided with various anti-slip means so that the foot does not slip when an operator puts his foot on the foot in a substantially horizontal posture. Preferably. In the case of the illustrated example, a head portion 12a having a large diameter is formed at the shaft end of the screwless bolt 12, and the operator's shoe sole is locked so as not to easily slip off the shaft end of the screwless bolt 12. To do.

Further, it is preferable to form a non-slip concave and convex on the peripheral surface of the screwless bolt 12 as the anti-slip means. The irregularities may be formed by knurls 12b as shown in FIG. 1 (C), or may be formed by ribs or joints 12c as shown in the different diameter reinforcing bars as shown in FIG. 1 (D). good.

According to the configuration of the above-described embodiment, the step device 1 loosens the nut 16 that constitutes the locking means 18, and rotates the step fitting 4 in a substantially horizontal posture with the pivot support bolt 15 as a pivot. Therefore, it is used as an original step. That is, in this usage state, the worker can rest his foot on the scaffolding 11 and ascend to the steel structure. At this time, since the stopper means 19 formed on the support portion 10 of the step metal fitting 4 contacts and supports the mounting portion 5 of the bracket metal fitting 3, the step metal fitting 4 does not rotate downward and acts on the scaffold portion 11. The load of the worker to be supported is suitably supported by the pivot bolt 15 and the stopper means 19.

When the work by the ascending tower is completed, the step fitting 4 is rotated in a substantially upright posture, and in this stored state, the nut 16 constituting the locking means 18 may be fastened to the pivot bolt 15. Therefore, since the step fitting 4 is stored along the steel frame 2, it does not impair the aesthetic appearance of the steel structure. The step metal fitting 4 cannot be rotated in a horizontal posture unless the nut 16 is loosened with a tool such as a wrench. Therefore, unless such a tool is carried, a general person can freely use the step metal fitting. It is impossible to rotate 4 in a horizontal position, and it is possible to prevent towers from climbing without permission.

When the operator needs to go up the tower again for maintenance or the like, the step fitting 4 can be brought into a substantially horizontal posture by loosening the nut 16 constituting the locking means 18 with a tool such as a wrench. It can be rotated and used as the original step as described above.

[0022]

[Effect of device]

 According to the present invention, in a steel structure such as an angle steel tower or an outdoor steel structure, a step device is provided that simultaneously solves the problems of securing a foothold when climbing the tower and preventing the general public from climbing the tower. be able to.

That is, by simply rotating the step fitting 4 in a substantially horizontal posture, the scaffolding by the scaffolding portion 11 can be easily and easily secured, and the ascending tower can be achieved. At this time, since the supporting portion 10 of the step metal fitting 4 is provided with the stopper means 19 which is supported by the mounting portion 5 of the bracket metal fitting 3, the load due to the weight of the operator is preferably supported and the original step is performed. It is possible to carry out the function as a backup.

On the other hand, since the step fitting 4 is put into the retracted state along the steel frame 2 simply by rotating in a substantially upright posture, the aesthetic appearance of the steel frame structure is not impaired.

At this time, since the step metal fitting 4 in the upright posture is configured to be non-rotatably fixed by the locking means 18, there is a risk that an ordinary person may unnecessarily rotate the step metal fitting 4 in the horizontal posture and ascend the tower. Instead, you can promise safety by preventing accidents.

By the way, when the worker needs to go up the tower again, the lock means 18 is released by a tool carried for maintenance and inspection, and the step fitting 4 is rotated to a horizontal posture. As with the above, the scaffolding can be easily and easily secured, and the work efficiency is improved because the complicated work of carrying and mounting the step bolt unlike the conventional case is not required.

Further, according to the present invention, although the step device 1 is retractable, the combination of the bracket metal fitting 3 and the step metal fitting 4 is sufficient, the number of parts is small, and the respective metal fittings 3 and 4 are simple in configuration. Therefore, it can be implemented at low cost and can be provided at low cost.

[Brief description of drawings]

1A and 1B show an embodiment of the present invention, in which FIG. 1A is a side view showing an entire step device, FIG. 1B is a plan view showing the entire step device, and FIG. A side view showing an example, (D) is a side view showing another embodiment of the anti-slip means.

FIG. 2 is a side view showing the operation of the embodiment of the present invention and showing the entire step apparatus.

[Explanation of symbols]

 1 Step Device 2 Steel Frame 3 Bracket Metal Fitting 4 Step Metal Fitting 5 Mounting Part 6 Arm Part 7 Mounting Bolt 10 Support Part 11 Scaffold Part 12 Screwless Bolt 15 Pivoting Bolt 16 Nut 18 Locking Means 19 Stopper Means

Claims (1)

[Scope of utility model registration request] 1. A bracket (3) having an attachment portion (5) attached to a steel frame (2) of a structure and an arm portion (6) protruding from the attachment portion; with respect to the arm portion (6) A support part (10) pivotally attached so as to be rotatable between a substantially horizontal position and a substantially upright position, and a step fitting (4) having a scaffold part (11) extending from the support part; In the state where the step fitting (4) is rotated from a substantially upright posture to a substantially horizontal posture, the support means (10) is supported by the mounting portion (5) to maintain the substantially horizontal posture. ), The step metal fitting (4) is provided with a lock means (18) for non-rotatably fixing the step metal fitting in a state in which the step metal fitting (4) is rotated from a substantially horizontal position to a substantially upright position. A stepping device for a steel structure.