Concrete prefabricated stair mold with adjustable structural size

Abstract

A concrete prefabricated stair mold with an adjustable structural size comprises a stair flight step side mold (1) and a stair flight plane side mold (2), and the two ends of the stair flight step side mold (1) and the two ends of the stair flight plane side mold (2) are connected with stair platform molds (4) through bolts (7) respectively. A movable end mold (5) is arranged between the stair platform molds (4), and the stair platform molds (4) are connected with the movable end mold (5) through bolt bar clamps (6); the stair flight step side die (1), the stair flight plane side die (2) and the stair platform die (4) are connected with the bottom die (3) through the bolt bar clamps (6). By adjusting the stair flight plane side molds and the movable end molds, the thicknesses of different stair flights and the extension lengths of the upper end and the lower end of the stair can be changed, so that prefabricated stairs of multiple sizes can be produced only through one set of mold, the repeated utilization rate of the mold is greatly increased, and the production cost of the prefabricated stairs is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to prefabricated stair mould technical field relates to a concrete prefabricated stair mould of adjustable structure size. BACKGROUND

[0002] Building technology develops rapidly, and prefabricated building technology changes rapidly. At present, the cost of prefabricated building is much higher than that of cast-in-place concrete structure, and cost reduction and efficiency increase have become the focus of the prefabricated building industry. Prefabricated floor and stair are the most commonly used prefabricated components in prefabricated building, and the weight of single prefabricated stair mould is large, the cost is high, the reuse rate is low, and the amortization cost of single mould is high. The cost of stair mould accounts for a high proportion of the cost of prefabricated component mould. Therefore, a new technology is urgently needed to solve this problem, which is the key to ensure the quality of prefabricated components, improve the reuse rate of mould and production efficiency, and reduce the amortization cost of single mould.

[0003] Chinese patent CN 212948360U discloses "a concrete prefabricated stair mould with adjustable structure size", the bottom mould of the shape of stair footboard is fixed on the base, the top of the bottom mould is fixed with the top cover plate, the side of the bottom mould is provided with the fixed stop edge, the top of the fixed stop edge is provided with the upward bending part, and the cover plate is connected on the bending part by bolts, the length of the cover plate extends to the other side of the bottom mould, a plurality of bolt holes are formed on the stair footboard of the bottom mould, the lower surface of the movable stop edge is provided with the foot trough matched with the shape of the stair footboard of the bottom mould, and the movable stop edge is connected on the different positions of the bottom mould by bolts. The mould has the following disadvantages: first, too many parts of the stair mould can be disassembled and adjusted, which wastes time and is difficult to control the precision during adjustment; second, a plurality of bolt holes are formed on the stair footboard of the bottom mould, too many holes affect the rigidity of the mould and are easy to be deformed and damaged; third, the movable stop edge is connected with the bolt hole, which is easy to seep and leak mortar from the edge of the hole, resulting in the formation of powder edge on the edge of the bolt hole of the prefabricated component, affecting the quality and appearance of the prefabricated component. UTILITY MODEL CONTENTS

[0004] In order to make up for the shortcomings of the above prior art, the utility model provides a prefabricated stair mould which can be adjusted, and aims at solving the technical problems that the existing prefabricated stair mould cannot be used for pouring concrete stairs of different sizes, or although part of the prefabricated stair mould size can be adjusted, but it is not convenient during adjustment.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] The adjustable structural size concrete prefabricated stair mold comprises a ladder step side mold and a ladder step plane side mold, support rod pieces are arranged on both sides of the ladder step side mold and the ladder step plane side mold, the bottom edges of the ladder step side mold and the ladder step plane side mold are connected with a bottom mold through a bolt rod clamp, the two ends of the ladder step side mold and the ladder step plane side mold are connected with a stair platform mold through bolts, and movable end molds connected through bolt rod clamps are arranged between the stair platform molds. By adjusting the ladder step plane side mold and the movable end mold, the thickness of different ladder steps and the extension length of the upper and lower ends of the stair can be changed, so that only one set of mold can be used to produce prefabricated stairs of multiple sizes, and the reuse rate of the mold is greatly improved and the production cost of the prefabricated stair is reduced.

[0007] The utility model has the advantages that: by setting movable end mold, can realize the pouring of different size concrete stair, through setting bolt rod clamp, need not open hole on the contact surface of the component that pours, thereby avoid reducing concrete stair quality, simple structure, convenient size adjustment. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 It is the assembly drawing of the utility model.

[0009] Figure 2 It is the local structure schematic view of the utility model.

[0010] Figure 3 It is the mold adjusting schematic view of the utility model.

[0011] In the drawing: 1. ladder step side mold, 2. ladder step plane side mold, 3. bottom mold, 4. stair platform mold, 5. movable end mold, 6. bolt rod clamp, 7. bolt, 8. support rod piece. DETAILED DESCRIPTION

[0012] The utility model will be further explained in combination with the drawings in the embodiment.

[0013] Figure 1 、 Figure 2 As shown in the figure: a kind of adjustable prefabricated stair mold, including ladder step side mold 1 and ladder step plane side mold 2, ladder step side mold 1 and ladder step plane side mold 2 two ends are connected with stair platform mold 4 by bolt 7. Movable end mold 5 is arranged between stair platform mold 4, and the bolt rod clamp 6 is connected between the stair platform mold 4 and movable end mold 5. Ladder step side mold 1, ladder step plane side mold 2 and stair platform mold 4 are connected with bottom mold 3 by bolt rod clamp 6.

[0014] Figure 3As shown: according to the size of the casted stair, the movable end mold 5 is placed and fixed with the bolt rod clamp, and then the stair can be casted. When the stair with different thickness of steps and different length of platform needs to be casted, the bolt rod clamp is loosened, the step side mold 2 and the stair platform molds 4 at both ends thereof and the movable end mold 5 are adjusted to the appropriate position according to the size of the casted stair, and then the bolt rod clamp is tightened, and the stair with different size can be casted.

Claims

1. A modular concrete precast stair mold, comprising a tread side mold (1) and a landing side mold (2), characterized in that: The ladder step side mold (1) and the ladder step plane side mold (2) are connected with the stair platform mold (4) through bolts (7) at both ends respectively; the movable end mold (5) is arranged between the stair platform molds (4), and the stair platform mold (4) and the movable end mold (5) are connected through the bolt rod clamp (6); the ladder step side mold (1), the ladder step plane side mold (2) and the stair platform mold (4) are connected with the bottom mold (3) through the bolt rod clamp (6).

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