KR-20260066900-A - Precast concrete stairway

Abstract

A precast concrete staircase is disclosed. A precast concrete staircase according to one aspect of the present invention is a precast concrete staircase that connects a pair of support plates fixed in a position facing a wall surface at different positions along the height direction, wherein the staircase comprises a pair of side portions facing each other along the width direction, and a step portion disposed between the pair of side portions and having a support surface that supports the load of a user, and the pair of side portions and the step portion may be integrally formed of precast concrete.

Inventors

• 김중희
• 이승재
• 최준호

Assignees

• (주)케이엔글로벌
• 주식회사경도

Dates

Publication Date

20260512

Application Date

20241105

Claims (17)

1. A precast concrete staircase connecting a pair of support plates fixed in a position facing a wall at different locations along the height direction, The above stairs are, A pair of side sections arranged opposite each other along the width direction; and A footrest portion disposed between a pair of the above-mentioned side portions and equipped with a support surface that supports the user's load; Includes, A precast concrete staircase in which a pair of the above-mentioned side parts and the above-mentioned footing parts are integrally formed of precast concrete.
2. In paragraph 1, A precast concrete staircase having a first reinforcing member formed to extend in the width and depth directions so as to be positioned opposite the support surface within the interior of the above-mentioned footing.
3. In paragraph 2, A precast concrete staircase in which upward support points and downward support points are alternately provided along the depth direction in the first reinforcing member.
4. In paragraph 2, A precast concrete staircase in which upward support points and downward support points are alternately provided along the width direction on the first reinforcing member.
5. In paragraph 2, A precast concrete staircase having a second reinforcing member formed by bending inside the side portion to support a load applied through the footrest portion.
6. In paragraph 5, The above-mentioned second reinforcing member is a precast concrete staircase comprising a body frame extending along the height direction and a pair of side frames extending along the width direction from both ends of the body frame in the height direction.
7. In paragraph 6, The above body frame is positioned facing inward in the width direction, and A pair of the above-mentioned side frames are precast concrete stairs positioned facing outward in the width direction.
8. In Paragraph 7, A precast concrete staircase having a body welding surface that is fixed to the first reinforcing member by welding in the above body frame.
9. In paragraph 6, A precast concrete staircase having an angle member that is hooked and supported on the upper surface of the support plate at the end of the side portion.
10. In Paragraph 9, The above angle member is a precast concrete staircase comprising a fixed frame fixed to the end of the side portion and a locking frame extending from the fixed frame toward the support plate.
11. In Paragraph 10, A precast concrete staircase having an angle welded surface that is fixed to the second reinforcing member by welding on the fixed frame above.
12. In Paragraph 10, A precast concrete staircase having a seating surface that rests on the upper surface of the support plate in the above-mentioned hanging frame.
13. In paragraph 6, The above side portion is provided with a welding auxiliary frame arranged along the extension direction of the side frame, and One side of the above-mentioned welding auxiliary frame is fixed to one side of the above-mentioned side frame in the height direction, and A precast concrete staircase in which the other side of the above-mentioned welding auxiliary frame is bent to wrap around the end of the side frame and fixed to the end of the side frame.
14. In Paragraph 13, A precast concrete staircase having an angle member that is hooked and supported on the upper surface of the support plate at the end of the side portion.
15. In Paragraph 14, The above angle member is a precast concrete staircase comprising a fixed frame fixed to the end of the side portion and a locking frame extending from the fixed frame toward the support plate.
16. In paragraph 15, A precast concrete staircase having an angle welding surface that is fixed to the other side of the welding auxiliary frame by welding on the fixed frame above.
17. In paragraph 15, A precast concrete staircase having a seating surface that rests on the upper surface of the support plate in the above-mentioned hanging frame.

Description

Precast concrete stairway The present invention relates to a temporary structure, and more specifically to a precast concrete staircase. Generally, stairs are required to connect the vertical circulation between the upper and lower floors of a building. In reinforced concrete structures, stairs are completed through wet processes such as formwork installation, rebar placement, and concrete pouring, just like other parts. However, wet processes have the disadvantage of being inefficient due to the large amount of on-site work. In particular, constructing stairs by individually forming each step is not an easy task. Furthermore, high-strength concrete must be used in super high-rise buildings, but since high-strength concrete has poor fluidity and is difficult to pump upwards, stair construction has not been easy as the building rises higher. A dry process using precast concrete (PC) has been proposed to improve upon the disadvantages of the wet process. Korean Registered Patent Publication No. 10-0459613 discloses a conventional method for constructing PC stairs. This conventional method involves manufacturing the landing and the stair ramp separately using PC and then assembling them. However, this method involves performing temporary work, such as installing shoring to support the landing, during the landing construction process, and connecting the landing and the stair ramp by using a cross joint method. Since the stair ramp consists solely of treads, there was a problem where cracks easily formed due to reduced durability. Therefore, there is a need to develop technology capable of solving these problems. FIG. 1 is a plan view illustrating the state in which a precast concrete staircase is installed according to one embodiment of the present invention. FIG. 2 is a side view illustrating the state in which a precast concrete staircase according to one embodiment of the present invention is installed. FIG. 3 is a perspective view illustrating the side and footrest portions of a precast concrete staircase according to one embodiment of the present invention. FIG. 4 is a cross-sectional view illustrating the state of a footrest portion of a precast concrete staircase cut in the height direction according to one embodiment of the present invention. FIG. 5 is a cross-sectional view illustrating the state of a footrest portion of a precast concrete staircase cut in the depth direction according to one embodiment of the present invention. FIG. 6 is a cross-sectional view illustrating the state of a footrest portion of a precast concrete staircase cut in the width direction according to one embodiment of the present invention. FIG. 7 is an enlarged perspective view of the side portion of a precast concrete staircase according to one embodiment of the present invention. FIG. 8 is a cross-sectional view illustrating the state in which the side and footing sections of a precast concrete staircase according to one embodiment of the present invention are cut in the width direction. FIG. 9 is a cross-sectional view showing the side portion and support plate of a precast concrete staircase according to one embodiment of the present invention cut in the depth direction. FIG. 10 is an enlarged perspective view illustrating a modified example of a side portion (equipped with a welded auxiliary frame) of a precast concrete staircase according to one embodiment of the present invention. FIG. 11 is a cross-sectional view showing a modified example of a side portion (equipped with a welded auxiliary frame) and a support plate of a precast concrete staircase according to one embodiment of the present invention, cut in the depth direction. Hereinafter, embodiments of the present invention are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein. To clearly explain the present invention, parts unrelated to the description in the drawings have been omitted, and the same reference numerals have been used throughout the specification for identical or similar components. The words and terms used in this specification and claims are not limited to their ordinary or dictionary meanings, but should be interpreted in a meaning and concept consistent with the technical spirit of the invention in accordance with the principles by which the inventor defines terms and concepts to best describe his invention. Therefore, the embodiments described in this specification and the configurations illustrated in the drawings correspond to preferred embodiments of the present invention and do not represent all technical concepts of the present invention; thus, various equivalents and modifications that may replace such configurations may exist at the time of filing the present invention. In this specification, terms such as “comprising” or “having” are intend