JP3030027U - Step board for temporary stairs - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a step plate for a temporary staircase that can be easily attached to a pillar installed at an angle. SOLUTION: Angle face plates are fixed to both sides of a step plate. An arm is rotatably supported on the angle plate. A clamp is attached to the free end of the arm so that the axial direction of the hollow portion of the clamp can be freely changed. Furthermore, the clamp is provided with a pin that can project toward the angle face plate 4, and by tightening the support,
Eject the pin outward. When ejecting the pin outward, the tip of the pin is inserted into the angle adjusting hole formed in the angle face plate, and the step plate is fixed in the rotation direction.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a step board for temporary stairs used at, for example, a construction site.

[0002]

[Prior art]

 FIG. 4 shows the structure of a conventional temporary stair step plate. In the figure, 1 indicates a step plate. On both sides of the step plate 1, clamps 2 that hold the columns (generally iron pipes) installed at an inclination and support the step plate 1 in a stepwise manner are attached. The clamp 2 is configured to include a fixed cylinder 2A, a movable cylinder 2B, and a tightening tool 2C configured by a bolt and a nut for tightening the movable cylinder 2B. The column is inserted into a hollow portion 3 formed by being surrounded by the fixed cylinder 2A and the movable cylinder 2B, and the column is fastened by the fastener 2C to fix the step plate 1 to the column.

The clamp 2 is attached to the step plate 1 via an angle face plate 4. The angled face plate 4 is provided so that the axial direction of the hollow portion 3 of the clamp 2 can be freely changed. In other words, it is provided for adjusting the posture of the step plate 1 so that it can be set in a horizontal posture in accordance with the installation angle of the pillars that are installed at an angle.

[0004]

[Problems to be solved by the device]

 A conventional angle face plate 4 is attached to the step plate 1 with two bolts 5 and 6. One bolt 6 is screwed to the step plate 1 through a plurality of angle adjusting holes 7 formed in the angle face plate 4. The posture of the step plate 1 is adjusted by selecting the angle adjusting hole 7. Therefore, conventionally, it is necessary to tighten and fix the four bolts 5 and 6 on each of the left and right sides and the four bolts 5 and 6 on both sides, and it takes time and effort to attach many step plates 1 to the column, especially at high places. There were many problems because the work involved danger.

An object of the present invention is to provide a step plate for a temporary staircase that can reduce the bolt tightening work as much as possible and can easily construct a temporary staircase.

[0006]

[Means for Solving the Problems]

 In this invention, angle face plates are fixed to both sides of the step plate by, for example, welding. The angle face plate is provided with an arm rotatably supported along the plate face of the angle face plate. A clamp is attached to the free end side of the rotation of the arm, and the structure allows the angle of the hollow part of the clamp in the axial direction to be freely changed by the rotation of the arm.

A through hole is formed from the hollow portion of the clamp toward the angle face plate, and the pin is mounted in the through hole so as to be able to move back and forth. A plurality of clamp angle adjusting holes are formed on the angle face plate along the turning radius of the arm. With this structure, the pin is ejected outward by inserting the column into the hollow portion of the clamp and tightening the column. By inserting the tip of the pin into one of the angle adjustment holes formed in the angle face plate, the rotation angle of the arm is determined, and the angle of the hollow part of the clamp, that is, the angle of the support column is determined accordingly. It

Therefore, according to the temporary stair step plate according to the present invention, the step plate can be attached to the slanted column only by performing the work of tightening the column with the clamp. Therefore, the number of bolts to be tightened is only required to tighten two nuts on the left and right, and temporary stairs can be installed easily.

[0009]

[Embodiment of device]

 FIG. 1 shows an embodiment of this invention. In the figure, 1 indicates a step plate. In this invention of the step plate 1, angle face plates 4 are fixed to both sides by welding or the like. An arm 10 is rotatably supported by a rivet 11 on the angle face plate 4. That is, the arm 10 is supported rotatably in the direction along the plate surface of the angle face plate 4.

The clamp 2 is attached to the rotation free end side of the arm 10. In this embodiment, as shown in FIG. 3, the fixed cylinder 2A and the movable cylinder 2B forming the arm 10 and the clamp 2 are made of extruded aluminum material. That is, the fixed cylinder 2A constituting the clamp 2 is formed integrally with the arm 10 by an aluminum extrusion mold material. The feature of the present invention is that the pin 12 is mounted on the peripheral surface of the fixed cylinder 2A so as to be able to move forward and backward from the hollow portion 3. An angle adjusting hole 7 is formed in the angle face plate 4 as shown in FIG. The pin 12 is inserted into the angle adjusting hole 7 to set the direction of the axis of the hollow portion 3.

In the embodiment shown in FIG. 3, a spring accommodating portion 14 is provided on the outer peripheral surface of the fixed cylinder 2 A, and a coil spring 15 is accommodated in the vane accommodating portion 14, and the coil spring 15 causes the pin 12 to have a hollow portion of the clamp 2. It gives a biasing force toward the center of 3. Reference numeral 16 denotes a flange fixed to the pin 12, 17 denotes a flange fixed to the spring accommodating portion 14, and the spring 15 applies a repulsive force between these flanges 16 and 17, and the repulsive force causes the pin 12 to move to the hollow portion 3 of the hollow portion 3. Bias towards the center.

By inserting the support column 18 (see FIG. 1) into the hollow portion 3 and tightening the support column 18 with the fastening tool 2C that constitutes the clamp 2, the pin 12 is pushed outward by the support column 18. By aligning any one of the angle adjusting holes 7 (see FIG. 2) formed in the angle face plate 4 at the position where the pin 12 is pushed out, the tip of the pin 12 is positioned at the tip of these angle adjusting holes. 7 is inserted.

By inserting the pin 12 into any of the angle adjusting holes 7, the arm 10 is prevented from rotating and the rotation angle position is fixed. By selecting any of the angle adjusting holes 4A to 4E according to the inclination angle of the column 18, the posture of the step plate 1 can be installed in a horizontal posture.

[0014]

[Effect of device]

 As described above, according to the present invention, the step plate 1 can be fixed to the slanted column 18 only by performing the operation of tightening the column 18. Therefore, to fix one step plate 1, it is only necessary to tighten the left and right fasteners 2C, and the work required for the attachment can be greatly simplified. Therefore, the step plate can be easily attached even at a high place, and the effect is great for practical use.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a side view for explaining the structure of the angle face plate used in the present invention.

FIG. 3 is a plan view for explaining the structure of the main part of the present invention.

FIG. 4 is a perspective view for explaining a conventional technique.

[Explanation of symbols]

 1 Step Plate 2 Clamp 3 Hollow Part 4 Angle Face Plate 7 Angle Adjusting Hole 10 Arm 11 Rivet 12 Pin 13 Hole 14 Spring Storage Section 15 Coil Spring 16, 17 Flange

Claims (3)

[Scope of utility model registration request] 1. A. First Embodiment A step plate supported by slanted columns to form stairs; B. Angle face plates mounted on both sides of the step plate in a direction orthogonal to the plate surface of the step plate; An arm supported by the angle face plate and supported so that an angle intersecting with the plate face of the step plate can be freely changed; A clamp that is provided at the free end of the arm and that holds the tilted support column; A pin penetrating between a hollow portion of the clamp and a hole formed in the angle face plate; A temporary step plate for stairs, which is formed by a plurality of holes for penetrating the pins in the angle face plate and a plurality of angle adjusting holes for freely changing the angle of the arm. 2. A. A step plate supported by slanted columns to form stairs; B. Angle face plates mounted on both sides of the step plate in a direction orthogonal to the plate surface of the step plate; An arm supported by the angle face plate and supported so that an angle intersecting with the plate face of the step plate can be freely changed; A clamp that is provided at the free end of the arm and that holds the tilted support column; A pin penetrating between a hollow portion of the clamp and a hole formed in the angle face plate; A plurality of holes for penetrating the pins are formed in the angle face plate, and a plurality of angle adjusting holes for freely changing the angle of the arm; A step plate for a temporary staircase constituted by a spring that biases the pin toward the center of the hollow portion of the clamp. 3. A. A step plate supported by slanted columns to form stairs; B. Angle face plates mounted on both sides of the step plate in a direction orthogonal to the plate surface of the step plate; An arm formed of an extruded aluminum material supported by a rivet on the angle face plate and supported so that the angle intersecting with the plate surface of the step plate can be freely changed; A clamp that integrally molds the free end portion of this arm with the same aluminum extruded mold material, and that holds the support pillar installed at an angle; A pin penetrating between a hollow portion of the clamp and a hole formed in the angle face plate; A plurality of holes for penetrating the pins are formed in the angle face plate, and a plurality of angle adjusting holes for freely changing the angle of the arm; A step plate for a temporary staircase constituted by a spring that biases the pin toward the center of the hollow portion of the clamp.