JP2005207095A - Tread structure of footstep for ascending and descending footstep - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tread structure of a footstep for ascending and descending capable of surely preventing the toes from slipping out of a tread and surely gripping the toes, which is free from an edge of a synthetic resin formed in an intersection of two sides inside the tread for securing safe ascending and descending. <P>SOLUTION: The tread 2 of the footstep for ascending and descending comprises a core 4 and a synthetic resin 5 covering the core, and has a U shape in a plan view. The cross section of the tread is formed in an approximately hexagonal shape. On both side faces of the tread having the hexagonal shape, an inclination angle α of the inner side face 9 with respect to a vertical line is larger than an inclination angle β of the outer side face 12 with respect to the vertical line. The intersection of inclined planes extended from the bottom face 7 and the upper face 6 of the inner side face is cut to form the vertical face 13, and a gripping part used for ascending and descending the footstep is formed . <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a foot part structure of an ascending / descending footrest that can be attached to any outer wall such as a manhole pipe or a seawall.

  Conventionally, in a foot part of an elevating footrest made of a core metal and a synthetic resin covering it, the cross-sectional shape of the foot part is a substantially hexagonal shape, and a corrugated pattern is formed on its inner surface. There is a foot part structure of a lifting / lowering footrest that is formed and used to prevent slipping when gripping the foot part (see, for example, Patent Document 1).

Japanese Patent No. 29951916 FIG.

  By the way, in the prior art, only the corrugated pattern formed on the inner surface is used for the anti-slip when the foot part is gripped, and no consideration is given to the other side and the bottom for the non-slip. Not only that, but with the corrugated pattern on the inner surface, it is possible to prevent side slipping of the finger, but it is not possible to demonstrate exceptional efficacy against slipping of the finger from the most required foot step, Since the cross-sectional shape of the foot step portion is substantially hexagonal and the inner side surface of the foot step portion is constituted by the two sides of the hexagon shape, there is a possibility that the edge of the synthetic resin is easily formed at the intersection.

  The present invention has been made in view of such problems of the prior art, and the object of the present invention is to reliably prevent slipping of a finger from the stepping portion and ensure gripping. In addition, an object of the present invention is to provide a foot part structure for a lifting / lowering footrest that is safe at the time of ascent / descent so that a synthetic resin edge is not formed at the intersection of two sides of the inner side surface of the foot part.

  In order to achieve the above object, the foot part structure of the foot lift for lifting and lowering in the present invention is the foot part of the foot foot for lifting and lowering having a U-shape in plan view made of a core metal and a synthetic resin covering the core metal. The cross-sectional shape of the foot portion is substantially hexagonal, and the inclination angle with respect to the vertical line on the inner side surface is larger than the inclination angle with respect to the vertical line on the outer side surface on both side surfaces of the substantially hexagonal foot step portion. In addition, the crossing portions of the inclined surfaces extending from the upper surface and the bottom surface of the inner side surface are cut out to form a vertical surface, which is used as a grip portion when the footrest is lifted.

  Further, the corrugated surface has a corrugated surface in the axial direction of the bottom surface of the foot pedal.

  As described above, if the angle of inclination with respect to the vertical line on the inner side surface is larger than the angle of inclination with respect to the vertical line on the outer side surface on both sides of the foot step part, the fingers and palms are securely attached to the foot step part. It fits to prevent the slipping of multiple steps and stepped fingers on both sides of the foot part, and to cut the intersection of inclined surfaces extending from the top and bottom of the inner side. By forming the cut-out vertical surface, the foot part structure of the lifting / lowering footrest that can be moved up and down with certainty and safety so that the edge of the synthetic resin is not formed at the intersecting part is obtained.

  Furthermore, by forming a corrugated surface on the surface in the axial direction of the bottom surface, the foot part structure of a lifting footrest that can be lifted and lowered more securely is obtained.

  The present invention is a foot part structure in which a lifter lifts and lowers safely by gripping the foot part of the foot lift for lifting by hand.

  FIG. 1 to FIG. 3 relate to an embodiment of the foot part structure of a lifting footing device according to the present invention, and FIG. 1 is a partial plan view of the lifting foot device to which the foot part structure is applied. 2 is a front view of FIG. 1, and FIG. 3 is a cross-sectional view taken along line AA of FIG.

  In the figure, reference numeral 1 denotes a lifting footrest that can be attached to a manhole pipe, an outer wall such as a revetment, a basement, etc. The footrest 1 is folded at a right angle from a foot portion 2 and both ends thereof. It consists of the parts 3 and 3 and the attachment part (not shown) further extended from each side part 3 and attached to a wall surface (not shown), and the synthetic resin 5 which covers the U-shaped cored bar 4 in plan view It is comprised by the coating | coated part.

  .. Are formed integrally with the covering portion of the synthetic resin 5 on the upper surface 6 and the bottom surface 7 of the foot portion 2, for example. Further, the upper surface 6 and the bottom surface 7 of the foot portion 2 are formed to be inclined at an angle of 1 degree to 5 degrees from the axial center S to both side portions 3 and 3, and are formed on the inner surface 9 of the foot portion 2. Has a corrugated pattern 10 formed in the axial direction of the side surface to prevent the sideslip of the finger. Further, reflectors 11 and 11 are attached to the corners of the foot part 2 and the side parts 3 and 3.

  Further, the cross-sectional shape of the foot step portion 2 is substantially hexagonal as shown in FIG. 3, the upper surface 6 and the bottom surface 7 are formed horizontally, and the inner side surface 9 and the outer side surface 12 are two sides of the hexagon. It consists of The inclination angle α (for example, 15 degrees) with respect to the vertical line of the inner side surface 9 is made larger than the inclination angle β (for example, 10 degrees) with respect to the vertical line of the outer side surface 12.

Further, the intersecting portion of the inclined surfaces extending from the upper surface 6 and the bottom surface 7 of the inner side surface 9 is cut out, and a vertical surface 13 is formed along the axial direction of the foot portion 2.
It is also possible to cut out the intersecting portions of the inclined surfaces extending from the upper surface 6 and the bottom surface 7 of the outer surface 12 and form the vertical surface 14 along the axial direction of the foot portion 2.

When a plurality of lifting / lowering footrests 1 provided with the above-described stepping portions 2 are vertically attached to an appropriate outer wall and the lifter moves up and down using these lifting footrests 1, 1. In addition, the lifter puts his / her foot on the foot part 2 of the lower lifting / lowering footrest 1 and lifts / lowers while grasping the foot part 2 of the upper / lower footrest 1 by hand. In the stepped portion 2, slipping of the foot is prevented by anti-slip patterns 8, 8... Formed on the upper surface of the stepped portion 2, and the stepped portion of the upper lifting foot 1 that is gripped by hand. 2, the fingers of the elevator are fitted to the corrugated pattern 10 formed on the inner side surface 9, and the inner side surface 9 and the outer side surface 12 of the foot part 2 are each composed of two sides of the hexagon. The inclination angle α (for example, 15 degrees) with respect to the vertical line is larger than the inclination angle β (for example, 10 degrees) with respect to the vertical line of the outer surface 12. Therefore, when the lifter grips the foot part 2 when moving up and down, the finger or palm surely fits the foot part 2 regardless of whether the grip direction is upward or downward, and the foot part 2 is gripped. The anti-skid action can be sufficiently performed.
In addition, by forming a vertical surface 13 along the axial direction of the foot portion 2 by notching at the intersecting portion of the inclined surfaces extending from the upper surface and the bottom surface of the inner surface 9 of the foot portion 2, synthetic resin is formed at the intersecting portion. It is a foot part structure of the foot lift 1 that is safe so that no edge is formed.

  FIGS. 4 to 6 relate to another embodiment of the foot part structure of the lifting footing device according to the present invention, and FIG. 4 is a partial plan view of the lifting foot device to which the foot part structure is applied. 5 is a front view of FIG. 4, and FIG. 6 is a sectional view taken along line BB of FIG.

In the figure, for example, triangular reflectors 15 and 15 that are conspicuous are attached in the vicinity of both ends of the foot step portion 2 between the side portions 3 and the anti-slip pattern 8 between them.
In addition, a waveform 17 having a plurality of irregularities 16 on the surface is formed in the axial direction of the bottom surface 7 of the foot step portion 2.
The other configurations are substantially the same as those of the first embodiment, and thus the same reference numerals are given and the description thereof is omitted.

  In the case of this embodiment, by forming a grip 17 having a corrugated shape 17 having a plurality of irregularities 16 on the bottom surface 7 of the foot step portion 2, a lifting foot that can be lifted and lowered more reliably and safely. The foot part structure of the tool 1 is obtained.

It is a partial top view of the raising / lowering footrest to which the foot part structure which concerns on one Example of this invention is applied. It is a front view of FIG. It is AA sectional drawing of FIG. It is a partial top view of the footrest for raising / lowering to which the foot part structure which concerns on the other Example of this invention is applied. FIG. 5 is a front view of FIG. 4. FIG. 5 is a cross-sectional view taken along the line BB in FIG. 4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lifting footrest 2 Foot part 3 Side part 4 Core metal 5 Synthetic resin 6 Upper surface of foot part 7 Bottom surface of foot part 9 Inner side surface of foot part 12 Outer side surface of foot part 13 Vertical surface α, β Inclination angle 16 Concavity and convexity 17 Waveform

Claims (2)

In the foot part of the lifting footrest having a U-shaped plan view made of a cored bar and a synthetic resin covering the same, the cross-sectional shape of the foot part is a substantially hexagonal shape. On both sides, the angle of inclination of the inner side surface with respect to the vertical line is made larger than the angle of inclination of the inner side surface with respect to the vertical line, and the intersecting portion of the inclined surfaces extending from the upper surface and the bottom surface of the inner side surface is notched to form a vertical surface. And the foot part structure of the foot-lifter for raising / lowering characterized by using as a holding part at the time of raising / lowering of a foot-hanger. 2. The foot part structure of an ascending / descending footrest device according to claim 1, wherein a corrugated surface is formed in the axial direction of the bottom surface of the foot part.

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