JPH084461A - Installation structure for step - Google Patents

Abstract

PURPOSE:To improve the productivity by arranging a step between the opposed surfaces of the left and right supporting pillars, fixing the end part of the step on the supporting pillar through a screw, and fitting a cap made of resin at the step end part with the supporting pillar so as to be in a turn disabled form for the supporting pillar, CONSTITUTION:A cap 8 is fitted with the end part of a stepping crosspiece 7, and the outer surface side of the cap 8 is fitted with a supporting pillar 4, and the surfaces in contact with the supporting pillars of the projection parts 14 and 15 of the cap 8 are formed to the regulting surfaces 14a and 15a, and the turn of the cap 8 around the axis in the leftward and rightward directions for the supporting pillar 4 is disabled, and the turn of the intermediate step 6 around the axis center in the leftward and rightward directions for the supporting pillar 4 is prevented. Then, an insertion hole 16 for inserting a screw 10 for the installation of the step 6 into the supporting pillar 4 is formed on the wall part on the outside in the leftward and rightward directions of the supporting pillar 4. Then the screw 10 for the installation of the step 6 is inserted into the supporting pillar 4, and the screw shaft part is inserted into an insertion hole 16 formed on the wall part on the inside in the leftward and rightward directions of the supporting pillar 4 and the insertion hole 13 of the cap 8, and screwed with the screw part 11 of the stepping crosspiece 7. The step 6 is installation-fixed on the supporting pillar 4 by one screw 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a step mounting device used for a step such as a stepladder.

[0002]

2. Description of the Related Art In general, a stepladder is formed by connecting upper and lower ends of a pair of front and rear legs so as to be rotatable and fixed around a left and right axis. The middle-aged comrades are connected by steps. The steps are arranged between the facing surfaces of the left and right columns in a substantially orthogonal shape to the columns.

Further, the step is attached and fixed to a column, and as the step attachment method, the step is fixed by a screw which penetrates the column from the outside in the left-right direction and is screwed into an engaging portion provided on the step side. There is something.

[0004]

In the above-mentioned conventional one, since the arrangement direction of the step with respect to the support column and the axial direction of the screw coincide with each other, in the case of one screw, the step is placed around the axial center of the screw. Because it rotates, by using the two screws on the top and bottom,
Since the step is attached and fixed to the column, there is a problem that productivity is poor and cost is high.

In view of the above-mentioned problems, it is an object of the present invention to improve the productivity and reduce the cost by fixing one step with a screw.

[0006]

The technical means taken by the present invention to solve the above-mentioned problems is to provide a pair of columns 4 facing each other between the facing surfaces 4a of the pair of columns 4 substantially orthogonal to the columns 4. The mounting device of steps 5 and 6 arranged in a circular shape, wherein the ends of steps 5 and 6 are mounted on the column 4 via a screw 10 having an axis in the direction along which the steps 5 and 6 are arranged. In the case where it is fixed, the steps 5 and 6 are performed.
On the end side of (3), there is provided a rotation stopping means for engaging with the column 4 and preventing the rotation of the screw 10 around the axis in steps 5 and 6.

[0007]

[Function] To attach and fix steps 5 and 6 to the column 4,
Since the steps 5 and 6 are stopped from rotating with respect to the support column 4 by the rotation stopping means, the screw 10 for attaching and fixing the steps 5 and 6 to the support column 4 is a shaft in a direction along the arrangement direction of the steps 5 and 6 with respect to the support column 4. Even if it has a core, steps 5 and 6 are attached and fixed to the column 4 by a single screw 10.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show a first embodiment, and in FIGS. 4 and 5, 1 is a stepladder as a step, and this stepladder 1 is
The upper end portions of a pair of legs 2 arranged to face each other in the front-rear direction are connected via a hinge device 3 so as to be rotatable and fixable around the left and right axes, so that they can be folded from the open leg use state shown in the figure. ing.

Each leg 2 has a pair of struts 4 arranged opposite to each other in the left-right direction, an upper step 5 connecting the upper ends of the left-right struts 4 to each other, and an intermediate part connecting the middle parts of the left-right struts 4 in the vertical direction. The upper step 5 and the intermediate step 6 are mainly composed of the step 6 and are arranged between the facing surfaces 4a of the left and right columns 4 in a direction (horizontal direction) substantially orthogonal to the columns 4.

As shown in FIGS. 1 to 3, the intermediate step 6 includes a step 7 formed from an extruded shape member made of an aluminum alloy in a cylindrical shape with both left and right ends open, and the left and right of the step 7. Resin caps 8 fitted to both ends in the direction
It consists of and. The tread 7 has an upper surface as a tread 9 and a lower portion formed in a V shape, and a screw-in portion 11 for screwing a step mounting screw 10 into a corner portion on the inner surface side of the V-shaped portion. It is integrally formed. As shown in FIGS. 2 and 4, the tread 7 has a front side in the front-rear direction (the opposite side of the front and rear legs) largely protruding from the column 4 and a front side in the front-rear direction in a side view. The upper part (opposite side of the front and rear legs) also slightly protrudes from the column 4.

The cap 8 is formed to have a cross-sectional shape which is substantially the same as the cross-sectional shape of the step 7 and has a fitting recess 12 into which the end of the step 7 is fitted, and the step 8 is formed. 7
An insertion hole 13 is formed in a portion corresponding to the screw-in portion 11. Further, on the outer surface side of the cap 8, a portion corresponding to the facing surface 4a of the strut 4 is in surface contact with the strut facing surface 4a, and a portion protruding from the strut 4 to the front and rear in a side view is an outer side in the left-right direction (left and right strut). (Opposite side of the column), and these projecting portions 14 and 15 are in surface contact with the front and rear surfaces of the column 4.

Therefore, by fitting the cap 8 to the end of the tread 7 and fitting the outer surface side of the cap 8 to the column 4, the surface of the projecting portions 14 and 15 of the cap 8 that contacts the column 4. Are used as the regulation surfaces 14a and 15a to prevent the cap 8 from rotating around the axis in the left-right direction with respect to the support column 4, thereby preventing the intermediate step 6 from rotating around the axis in the left-right direction with respect to the support column 4. Done.

In this embodiment, both of the projecting portions 14 and 15 are
The rotation stopping means is constituted by. In addition, the step mounting screw 1 is provided on the outer wall of the column 4 in the left-right direction.
An insertion hole 16 for inserting 0 into the column 4 is formed. Then, the step mounting screw 10 is inserted into the pillar 4, and the screw shaft portion of the through hole 16 and the cap 8 formed in the wall portion of the pillar 4 on the inner side in the left-right direction (opposite side of the left and right pillars). By inserting the intermediate step 6 into the insertion hole 13 and screwing it into the threaded portion 11 of the tread 7, the intermediate step 6 is attached and fixed to the column 4 with a single screw 10.

The upper step 5 is also attached and fixed to the column 4 in the same structure as the intermediate step 6. Figure 6
And FIG. 7 shows a second embodiment, in which the fitting groove 18 is formed in the wall portion on the inner side in the left-right direction of the strut 4, and the protruding ridge portion 19 fitted into the fitting groove 18 is provided on the outer surface side of the cap 8. It is intended to prevent the intermediate step 6 from being rotated. Other configurations are substantially the same as those in the first embodiment.

A ridge may be formed on the column 4 side and a fitting groove may be formed on the cap 8 side. Further, in the present embodiment, the ridge portion 19 (the fitting groove when the fitting groove is formed in the cap 8) constitutes a rotation stopping means.
8 and 9 show a third embodiment, in which the through hole 1 of the support column 4 is formed.
The engagement hole 20 is formed in the upper portion of the cap 6, and the engagement convex portion 21 inserted into the engagement hole 20 is formed on the outer surface side of the cap 8 to prevent the intermediate step 6 from rotating. . Other configurations are substantially the same as those in the first embodiment.

In this embodiment, the engaging convex portion 21 constitutes a rotation stopping means. The present invention is not limited to the stepladder, and may be applied to a mounting structure of a step, such as a ladder, arranged between the facing surfaces of a pair of columns and fixed to the columns, in addition to the above embodiment.

[0017]

According to the present invention, the mounting device of steps 5 and 6 is arranged between the facing surfaces 4a of the pair of columns 4 facing each other in a substantially orthogonal manner to the columns 4, In the case where the end portions of steps 5 and 6 are attached and fixed to the support column 4 via the screw 10 having the axial center along the arrangement direction of the steps 5 and 6, the end portions of the step 5 and 6 are To the side, engaging the stanchion 4, steps 5 and 6, screw 1
Since the rotation stop means for preventing the rotation around the axis 0 of 0 is provided, the rotation stop means performs steps 5, 6 for the support column 4.
Even if the screw 10 for fixing the steps 5 and 6 to the support 4 has the axis in the direction along the arrangement direction of the steps 5 and 6 with respect to the support 4, 4 can be mounted and fixed with one screw 10 to increase productivity and reduce cost.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a mounting portion of a step according to a first embodiment.

FIG. 2 is an outside view of a step.

FIG. 3 is a partial front sectional view of a mounting portion of a step.

FIG. 4 is a side view of the stepladder.

FIG. 5 is a front view of a stepladder.

FIG. 6 is an exploded perspective view of a mounting portion of a step according to a second embodiment.

FIG. 7 is a front sectional view of a mounting portion of a step.

FIG. 8 is an exploded perspective view of a mounting portion of a step according to a third embodiment.

FIG. 9 is a front sectional view of a mounting portion of a step.

[Explanation of symbols]

 4 Support 5 Upper step 6 Intermediate step 8 Cap 10 Screw

Claims (3)

[Claims] 1. A mounting device for steps (5) and (6), which are arranged substantially orthogonal to the supporting column (4) between opposing surfaces (4a) of a pair of supporting columns (4) arranged opposite to each other. And the steps (5), (6) through the screw (10) having an axial direction along the arrangement direction of the steps (5), (6),
In the one in which the end portion side of (6) is fixedly attached to the support column (4), the end portion side of the steps (5) and (6) is engaged with the support column (4) to step (5). , (6) is provided with rotation stopping means for preventing rotation of the screw (10) around the axis thereof. 2. A step according to claim 1, wherein the steps (5) and (6) are provided with a cap (8) made of resin at an end thereof, and the cap (8) is provided with a rotation stopping means. Mounting device. 3. A protrusion projecting so as to come into surface contact with both surfaces of the column (4) in a direction orthogonal to the column (4) and in a direction orthogonal to the arrangement direction of the steps (5), (6). 3. The step mounting device according to claim 1, wherein the rotation stopping means is constituted by the portions (14) and (15).