Single-station modular prestressed stair mold

Abstract

The utility model relates to the technical field of prestressed concrete stair forming, in particular to a single-station modular prestressed stair mold, which is characterized in that a stair unit is detachably connected to the surface, facing a pouring space, of a first body; a step mounting part facing the pouring space is formed on the second body, and the back plate unit is detachably connected to the step mounting part; the back plate units comprise multiple length models, the back plate units of each length model correspond to the stair units of one number combination, and the stair has the advantages that the number of the stair units can be increased or decreased according to needs, so that the stair is suitable for stairs of different lengths. The side molds with different lengths can be obtained by replacing the back plate units with different lengths in a matched manner so as to adapt to the change of the number of the stair units, so that the use flexibility of the stair mold is ensured, and the production cost of the stair is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of prestressed concrete stair forming, and particularly relates to a single-station modular prestressed stair mold. BACKGROUND

[0002] The conventional stair mold has the following inconvenient places in the production process, first, the concrete needs to be completely solidified before being taken out in the production process, especially when the stair containing the prestressed tendon is made, the next stair needs to be taken out and made after the concrete is completely solidified, so as to prevent the prestressed tendon from being combined with the concrete and shrinking under stress, resulting in the failure of stair making; second, the size of the made stair is difficult to adjust, since the building floor height and stair space net width of different projects are not the same, the stair mold is difficult to realize universality, leading to poor flexibility of the stair mold and high cost. SUMMARY

[0003] (I) Technical problem to be solved

[0004] In view of the above-mentioned defects and deficiencies of the prior art, the utility model provides a single-station modular prestressed stair mold, which solves the technical problems that the size of the made stair is difficult to adjust, the stair mold is difficult to realize universality, leading to poor flexibility of the stair mold and high cost.

[0005] (II) Technical scheme

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the main technical scheme including:

[0007] Firstly, the utility model provides a single-station modular prestressed stair mold, which comprises two opposite edge molds, two opposite end molds and a bottom mold arranged at the bottom of the two end molds and the two edge molds, the two edge molds, the two end molds and the bottom mold enclose a pouring space; one edge mold comprises a first body and a plurality of stair units, the stair units are detachably connected to the surface of the first body facing the pouring space and are distributed along the length direction of the first body; the other edge mold comprises a second body and a back plate unit, the second body is formed with a stair installation part facing the pouring space, and the back plate unit is detachably connected to the stair installation part; the back plate unit comprises a plurality of length types, and each length type of the back plate unit corresponds to a certain number of combined stair units.

[0008] (III) Beneficial effects

[0009] The utility model discloses a beneficial effect is: the utility model discloses single -station modularization prestressed stair mould, can efficiently realize the use demand of forming different length stair, and then greatly improved the stair mould's use flexibility. Stair unit is detachably connected along the length direction of first body, can increase or reduce the quantity of stair unit according to need, thereby adapting the stair of different length. Backboard unit is connected on the stair installation part of second body, and the second body forms the forming surface of stair together, and cooperation replaces the backboard unit of different length, can obtain the side mould of different length to adapt the change of stair unit quantity, and then guarantee the use flexibility of stair mould, reduced the production cost of stair.

[0010] Due to the modularization and detachable design, the mould can easily adapt to different sizes and shapes of stairs, greatly improving the production efficiency. Each part of the mould can be quickly disassembled and reassembled, so the mould replacement and preparation time can be greatly shortened, thereby improving the production efficiency. Through accurate module design and assembly, the precision and consistency of the stair can be ensured, and the product quality is improved. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is one of the structure schematic drawing of the utility model single -station modularization prestressed stair mould;

[0012] Figure 2 It is the structure schematic drawing of the utility model single -station modularization prestressed stair mould No. 2;

[0013] Figure 3 It is the structure schematic drawing of the utility model single -station modularization prestressed stair mould No. 3;

[0014] Figure 4 It is the structure schematic drawing of the utility model single -station modularization prestressed stair mould No. 4;

[0015] Figure 5 It is the structure schematic drawing of the utility model single -station modularization prestressed stair mould No. 5;

[0016] Figure 6 It is the utility model Figure 4 It is the local enlarged structure schematic drawing of X place in the utility model;

[0017] Figure 7 It is the utility model Figure 5 It is the local enlarged structure schematic drawing of Y place in the utility model.

[0018]

BRIEF DESCRIPTION OF DRAWINGS

[0019] 1, side mould;

[0020] 101, first body;102, stair unit;103, supporting leg;

[0021] 111, second body; B, stepped mounting portion; 112, back plate unit; C, waist hole; 113, weight reduction rib;

[0022] 2, end mold;

[0023] 3, bottom mold;

[0024] A, pouring space;

[0025] 4, tensioning frame;

[0026] 5, first locking mechanism; 51, screw rod;

[0027] 6, second locking mechanism, 61, swing rod;

[0028] 7, demolding mechanism; 71, connecting block; 72, demolding bolt;

[0029] 8, positioning mechanism; 81, taper pin; 82, positioning hole;

[0030] 9, rack; D, mounting platform. DETAILED DESCRIPTION

[0031] In order to better explain the utility model, so as to facilitate understanding, the following will be combined with the drawings of the utility model. Figures 1-7 The utility model is described in detail through specific embodiments. In this paper, the orientation of "up", "down" and other orientation terms is referred to the orientation of the drawings. Figure 1

[0032] Example 1:

[0033] With reference to Figures 1-7 The embodiment of the utility model provides a single-station modular prestressed stair mold, which comprises two edge molds 1 arranged oppositely, two end molds 2 arranged oppositely, and a bottom mold 3 arranged at the bottom of the two end molds 2 and the two edge molds 1, wherein the two edge molds 1, the two end molds 2 and the bottom mold 3 enclose a pouring space A; one edge mold 1 comprises a first body 101 and a plurality of stair units 102, and the stair units 102 are detachably connected to the first body 101; the other edge mold 1 comprises a second body 111 and a back plate unit 112, the second body 111 is provided with a stepped mounting portion B, the back plate unit 112 is detachably connected in the stepped mounting portion B, the surface of the back plate unit 112 and the second body 111 facing the first body 101 forms a forming surface, and the length direction of the first body 101 is the thickness direction of the edge mold 1; the back plate unit 112 comprises a plurality of length types, and each length type of the back plate unit 112 corresponds to a certain number of combinations of the stair units 102.

[0034] ​The stair mold disclosed in the embodiment can efficiently realize the use requirement of forming stairs of different lengths, thereby greatly improving the use flexibility of the stair mold. The stair units 102 are detachably connected along the length direction of the first body 101, and the number of the stair units 102 can be increased or reduced as needed, so as to adapt to stairs of different lengths. The back plate unit 112 is connected to the stair installation part B of the second body 111, and forms a forming surface of the stair together with the second body 111. By replacing the back plate unit 112 of different lengths, the side mold 1 of different lengths can be obtained to adapt to the change of the number of the stair units 102.

[0035] Due to the modular and detachable design, the mold can easily adapt to stairs of different sizes and shapes, greatly improving the production efficiency. The parts of the mold can be quickly disassembled and reassembled, so as to greatly shorten the replacement and preparation time of the mold, thereby improving the production efficiency. Through accurate module design and assembly, the precision and consistency of the stairs can be ensured, and the product quality is improved.

[0036] In addition, the stair unit 102 can also include various sizes, so that the stair mold can also form prefabricated stairs of different stair sizes.

[0037] The first body 101 and the second body 111 are each provided with a plurality of waist holes C extending along the length direction of the first body 101, which are suitable for connecting corresponding stair units 102 and back plate units 112 to provide adjustment allowance along the length direction of the first body 101.

[0038] The waist hole C allows the stair unit 102 and the back plate unit 112 to be connected to the first body 101 and the second body 111 by a connecting member including a bolt. For example, a threaded hole can be formed in the back of the stair unit 102 and the back plate unit 112, and the two are locked on the corresponding first body 101 and second body 111 by a bolt. This connection method is not only firm and reliable, but also easy to disassemble and reassemble.

[0039] The waist hole C extends along the length direction of the first body 101, providing adjustment allowance for the stair unit 102 and the back plate unit 112 in this direction. When assembling the mold, the positions of the stair unit 102 and the back plate unit 112 can be fine-tuned according to actual needs, thereby ensuring that the adjacent stair units 102 and the second body 111 and the back plate unit 112 are tightly fitted, so as to reduce the influence of the gap on the forming quality of the stairs.

[0040] Due to the presence of the waist hole C, the stair unit 102 and the back plate unit 112 can be easily positioned and fixed on the first body 101 and the second body 111. This flexibility enables the mold to adapt to stairs of different lengths and shapes, greatly improving production efficiency. When the stair design or production requirements change, only the corresponding stair unit 102 and back plate unit 112 need to be replaced or adjusted, without the need for large-scale modification of the entire mold. This reduces production costs and improves the utilization rate of the mold.

[0041] Embodiment 2:

[0042] With reference to Figures 1-7 In addition to having all the technical solutions of the above-mentioned embodiments, the embodiments of the present application further have the following technical solutions:

[0043] Further comprising a tensioning frame 4, which can be vertically hoisted in the pouring space and supported on the bottom mold 3; the cured stair can be supported in the tensioning frame 4 and form a stair assembly together with the tensioning frame 4, so that the reinforcing steel of the prestressed stair can be conveniently and quickly installed on the tensioning frame 4 and hoisted in the pouring space together with the tensioning frame 4, thereby improving the forming efficiency of the prestressed stair.

[0044] Meanwhile, after the stair is preliminarily cured, the stair assembly can be hoisted out of the pouring space to a specific area for further curing, and the idle pouring space can continue to perform stair forming operations, thereby reducing the idle time of the device and improving the production efficiency of the stair.

[0045] Embodiment 3:

[0046] With reference to Figures 1-7 In addition to having all the technical solutions of any one of the above-mentioned embodiments, the embodiments of the present application further have the following technical solutions:

[0047] Further comprising a rack 9, the top of which forms an installation platform D of the tensioning frame 4;

[0048] The bottom mold 3 extends horizontally to form one side of the rack 9 outside the two pouring spaces A; the bottom end of the corresponding side form 1 of the stair unit 102 is hinged on the rack 9 along the length direction of the first body 101, so that the corresponding side form 1 can swing between the vertically oriented first forming state and the horizontally oriented lying state; further comprising a swing driving member for driving the corresponding side form 1 to swing.

[0049] The corresponding side form 1 of the stair unit 102 further comprises a support leg 103 connected to the side of the first body 101 away from the stair unit 102, to support the first body 101 in the lying state.

[0050] In the embodiment, the base die 3 forms the frame 9 outside the two pouring spaces A, and the base die 3 is used not only to support the pouring spaces A but also to provide structural support for the swing of the side die 1, so that the side die 1 can be switched between the first forming state in the vertical orientation and the horizontal state in the horizontal orientation.

[0051] The bottom end of the side die 1 corresponding to the stair unit 102 is hinged to the frame 9 along the length direction of the first body 101. This design allows the side die 1 to swing between the vertical and horizontal directions, thereby facilitating the opening and closing of the mold and the pouring and removal of the stairs. The swing drive can be a hydraulic cylinder, a pneumatic cylinder, an electric push rod, etc., for providing the necessary power to switch the state of the side die 1. When the swing drive is the above-mentioned component, the two ends of the swing drive are hinged to the first body 101 and the base along the length direction of the first body 101, respectively.

[0052] In the horizontal state, in order to support the first body 101, the side die 1 corresponding to the stair unit 102 further comprises a supporting leg 103 connected to the side of the first body 101 away from the stair unit 102. These supporting legs 103 ensure that the first body 101 does not directly fall on the ground when the side die 1 is in the horizontal state, thereby avoiding damage and deformation, and also improving the stability of the first body 101.

[0053] The swing function of the side die 1 makes the mold easier to open and close, and the action of swinging allows the stair unit 102 and the concrete to gradually separate from top to bottom, reducing the difficulty of demolding, improving the efficiency of demolding, and avoiding adhesion between the concrete and the stair unit 102.

[0054] Embodiment 4:

[0055] With reference to Figures 1-7 In addition to having all the technical solutions of any of the above embodiments, the embodiments of the utility model further have the following technical solutions:

[0056] The side die 1 corresponding to the back plate unit 112 further comprises a weight-reducing convex strip 113, which is detachably connected to the side wall of the second body 111 and / or the back plate unit 112 facing the pouring space A, and the weight-reducing convex strip 113 is provided in multiple length types corresponding to the length of the back plate.

[0057] In the embodiment, the weight-reducing convex strip 113 can be arranged vertically in multiple numbers and also extend along the length direction of the first body 101 to reduce the overall weight of the stairs.

[0058] In addition, the weight-reducing convex strip 113 extending along the length direction of the first body 101 can be provided in an arched cross section, which not only reduces the weight of the back plate unit 112 but also effectively ensures the strength of the back plate unit 112.

[0059] Specifically, the weight-reducing protrusions 113 can be added or removed according to actual needs, thereby adjusting the overall weight and structural strength of the mold. Each back plate length has a matching weight-reducing protrusion 113, ensuring that the mold can maintain sufficient structural stability and precision while reducing weight. The design of the weight-reducing protrusions 113 can significantly reduce the weight of the mold, making it easier and more efficient during transportation, installation, and use. By precisely matching the weight-reducing protrusions 113 to the length of the back plate, the mold can ensure that it does not sacrifice its structural stability and precision while reducing weight. Since the weight-reducing protrusions 113 are detachable and come in various lengths, the mold can more easily adapt to different production needs and working environments. This flexibility makes the mold more versatile and practical.

[0060] Embodiment 5:

[0061] With reference to Figures 1-7 In addition to the above-mentioned technical solutions, the embodiments of the present application further have the following technical solutions:

[0062] The corresponding side mold 1 of the back plate unit 112 is horizontally slidably connected to the other side of the rack 9, so that the corresponding side mold 1 can be switched between a second forming state close to the stair unit 102 and a demolding state away from the stair unit 102; and further comprising a sliding drive member for driving the corresponding side mold 1 to slide.

[0063] In this embodiment, when the side mold 1 is in a position close to the stair unit 102, it forms a complete pouring space A together with other mold parts for the formation of the stairs. When the side mold 1 slides to a position away from the stair unit 102, it provides space for the demolding of the stairs, making it easier to remove the stair unit 102 from the mold. The sliding drive member can be a hydraulic cylinder, air cylinder, electric push rod or other similar driving mechanism, which can provide the necessary power to switch the state of the side mold 1.

[0064] The sliding connection of the side mold 1 makes the opening and closing of the mold more simple and fast, thereby improving the production efficiency of the stairs. The sliding drive member can ensure that the side mold 1 can move smoothly on the chassis, improve the demolding reliability, and reduce the risk of damaging the stairs due to demolding.

[0065] Because the back plate is provided with the weight-reducing protrusions 113, and the sliding demolding rather than the swinging demolding is adopted, it can ensure that the weight-reducing protrusions 113 do not interfere with the concrete during demolding, thereby ensuring the forming quality of the prefabricated stairs.

[0066] Embodiment 6:

[0067] With reference to Figures 1-7The embodiment of the utility model further has the following technical solutions in addition to all the technical solutions of any one of the above embodiments.

[0068] The prestressed stair mold further comprises a first locking mechanism 5, the first locking mechanism 5 comprises a screw rod 51 and two groups of nuts, the first body 101 and the second body 111 extend a connecting lug, the screw rod 51 passes through the connecting lug and extends along the thickness direction of the second body 111, and the two groups of nuts are located on the two sides away from each other of the connecting lug to lock the two edge molds 1 by rotating the nuts;The first locking mechanism 5 is arranged in multiple groups along the length direction of the first body 101 and is located at the top of the second body 111, and the top of the connecting lug is provided with a clearance opening for the screw rod 51;Further comprising a second locking mechanism 6, the second locking mechanism 6 comprises a swing rod 61 hinged on the tensioning frame 4 along the thickness direction of the second body 111, and when pouring concrete, the swing rod 61 can swing and switch between a locking position in the projection area of the second body 111 along the thickness direction of the second body 111 and a clearance position allowing the projection area of the second body 111 along the thickness direction of the second body 111 to swing.In the locking position, the end of the swing rod 61 can be connected to the back of the second body 111 away from the first body 101 by a bolt;The second locking mechanism 6 is located at the lower part of the second body 111.

[0069] In the embodiment, the first locking mechanism 5 comprises a screw rod 51 and two groups of nuts. The screw rod 51 passes through the connecting lug, which is a part extending from the first body 101 and the second body 111. The two groups of nuts are located on the two sides away from each other of the connecting lug. By rotating the nuts, the two edge molds 1 can be locked. This locking method is simple and effective, which can ensure the stability and precision of the mold during the pouring process. The first locking mechanism 5 is arranged in multiple groups along the length direction of the first body 101 and is located at the top of the first body 101. This arrangement can ensure the stability and stiffness of the mold in the length direction. The top of the connecting lug is provided with a clearance opening for the screw rod 51, so that the screw rod 51 can efficiently complete the disassembly and assembly on the connecting lug, thereby providing clearance for the tensioning frame 4 during the loading and unloading process.

[0070] By rotating the swing rod 61, the sliding clearance of the second body 111 corresponding to the edge mold 1 can be realized. When the edge mold 1 slides to the second forming state, the swing rod 61 can be rotated to extend the end of the swing rod 61 into the contour of the edge mold 1, and then the end of the swing rod 61 is connected to the back of the edge mold 1 by a bolt, thereby realizing locking. In cooperation with the first locking mechanism 5, the stability and precision of the mold during the pouring process can be further improved.

[0071] The first locking mechanism and the second locking mechanism 6 are arranged one above the other, which ensures the force balance of the two edge molds 1, thereby further improving the forming quality of the stair.

[0072] Example 7:

[0073] With reference to Figures 1-7 In addition to having all the technical solutions of any of the above embodiments, the embodiments of the utility model further have the following technical solutions:

[0074] The prestressed stair mold further comprises a demolding mechanism 7, the demolding mechanism 7 comprises a connecting block 71 fixed on the back of the tensioning frame 4 and a demolding bolt 72 threadedly connected on the second body 111, and the end of the demolding bolt 72 can abut against the connecting block 71, so that the second body 111 can move away from the tensioning frame 4.

[0075] After the pouring of the stair is completed, all the parts of the mold are in the locked state. At this time, the demolding bolt 72 has not been tightened to the extent that the second body 111 is separated from the tensioning frame 4.

[0076] When demolding is needed, the first locking mechanism 5 and the second locking mechanism 6 need to be loosened first, and then the swing rod 61 is swung to the position for giving way, and the operator will gradually tighten the demolding bolt 72. With the tightening of the bolt, its end will gradually abut against the connecting block 71 and generate a gradually increasing pushing force. When this pushing force is sufficient to overcome the adhesion between the mold and the stair, the second body 111 will start to move away from the tensioning frame 4, thereby realizing demolding.

[0077] The design of the demolding mechanism 7 makes the demolding process simpler and more efficient, reducing the operation difficulty and labor intensity. Moreover, the force exerted by the demolding mechanism 7 is linear, and the mold and the stair are separated by gradually exerting a pushing force, so that the demolding mechanism 7 can avoid sudden impact or deformation and also avoid damage to the concrete. Since the demolding process is simpler and more efficient, the production efficiency of the stair can be significantly improved.

[0078] Example 8:

[0079] With reference to Figures 1-7 In addition to having all the technical solutions of any of the above embodiments, the embodiments of the utility model further have the following technical solutions:

[0080] The prestressed stair mold further comprises a positioning mechanism 8, the positioning mechanism 8 comprises a taper pin 81 and a positioning hole 82 connected on the tensioning frame 4 and the second body 111 respectively, the taper pin 81 extends along the thickness direction of the edge mold 1, and the tip of the taper pin 81 can be inserted into the positioning hole 82 in the process that the second body 111 approaches the tensioning frame 4.

[0081] In the present embodiment, the taper pin 81 and the positioning hole 82 play the role of precise alignment. When the second body 111 approaches the tensioning frame 4, the tip of the taper pin 81 will automatically find and insert into the positioning hole 82. This process ensures that the various parts of the mold can maintain precise alignment when assembled, thereby avoiding deformation or misalignment of the mold.

[0082] The design of the positioning mechanism 8 makes the assembly process of the mold simpler and more efficient, thereby reducing the operation difficulty and labor intensity.

[0083] It can be understood that the above-mentioned embodiments 1-8 can be freely combined to form other embodiments of the present application, except for the parts in conflict.

[0084] In the description of the present application, it should be understood that the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0085] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0086] In the present application, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature is "above", "above" and "above" the second feature, which can be directly above or obliquely above the first feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature is "below", "below" and "below" the second feature, which can be directly below or obliquely below the first feature, or only indicates that the horizontal height of the first feature is lower than that of the second feature.

[0087] The term "includes" or any other similar term is intended to cover non-exclusive inclusion, so that the process, article or equipment / device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes the elements inherent in the process, article or equipment / device.

[0088] Thus far, the technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the protection scope of the utility model is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without deviating from the principles of the utility model, and the technical schemes after these changes or replacements will all fall within the protection scope of the utility model.

Claims

1. A single station modular pre-stressed stair form, characterized by: The two side molds (1) and the two end molds (2) are oppositely arranged, and the bottom mold (3) is arranged at the bottom of the two end molds (2) and the two side molds (1); the two side molds (1), the two end molds (2) and the bottom mold (3) enclose a pouring space (A); One of the side molds (1) comprises a first body (101) and a plurality of stair units (102), the stair units (102) are detachably connected to the surface of the first body (101) facing the pouring space (A), and are distributed along the length direction of the first body (101); The other side mold (1) comprises a second body (111) and a back plate unit (112), the second body (111) forms a stair mounting portion (B) facing the pouring space (A), and the back plate unit (112) is detachably connected to the stair mounting portion (B); The back plate unit (112) comprises a plurality of length types, and each length type of the back plate unit (112) corresponds to a number combination of stair units (102).

2. The single station modular pre-stressed stair mold of claim 1, wherein: The first body (101) and the second body (111) are both provided with a plurality of waist holes (C) extending along the length direction of the first body (101), which are suitable for connecting corresponding stair units (102) and back plate units (112) to provide an adjustment allowance along the length direction of the first body (101).

3. The single station modular pre-stressed stair mold of claim 1, wherein: It also comprises a tensioning frame (4) which can be vertically hoisted in the pouring space; The bottom mold (3) and the end mold (2) are both supported on the tensioning frame (4); the cured stair can be supported in the tensioning frame (4) and form a stair assembly together with the tensioning frame (4).

4. The single station modular pre-stressed stair mold of claim 3, wherein: It also comprises a rack (9) which forms an installation platform (D) of the tensioning frame (4) at the top; The bottom end of the side mold (1) corresponding to the stair unit (102) is hinged on the rack (9) along the length direction of the first body (101), so that the corresponding side mold (1) can be switched between a first forming state of vertical orientation and a horizontal state of horizontal orientation; it also comprises a swing driving member for driving the swing of the corresponding side mold (1).

5. The single station modular pre-stressed stair mold of claim 4, wherein: The side mold (1) corresponding to the stair unit (102) further comprises a supporting leg (103) connected to the side of the first body (101) away from the stair unit (102), so as to support the first body (101) in the horizontal state.

6. The single station modular pre-stressed stair mold of claim 5, wherein: The side mold (1) corresponding to the back plate unit (112) further comprises a weight-reducing convex strip (113) which is detachably connected to the side wall of the second body (111) and / or the back plate unit (112) facing the pouring space (A), and the weight-reducing convex strip (113) is provided in a plurality of length types corresponding to the length of the back plate.

7. The single station modular pre-stressed stair mold of claim 6, wherein: The side mold (1) corresponding to the back plate unit (112) is horizontally slidingly connected to the other side of the rack (9), so that the corresponding side mold (1) can be slidingly switched between the second forming state close to the stair unit (102) and the demolding state away from the stair unit (102). It also includes a sliding drive member for driving the sliding of the corresponding side mold (1).

8. The single-station modular pre-stressed stair mold of any one of claims 3-7, wherein: It also includes a first locking mechanism (5) including a screw rod (51) and two groups of nuts, the first body (101) and the second body (111) extending a connecting lug, the screw rod (51) passing through the connecting lug and extending along the thickness direction of the second body (111), and the two groups of nuts being located on the two sides away from each other of the connecting lug to lock the two side molds (1) by rotating the nuts. The first locking mechanism (5) is arranged in multiple groups along the length direction of the first body (101) and located at the top of the second body (111), and the top of the connecting lug is provided with a clearance opening for the screw rod (51). It also includes a second locking mechanism (6) including a swing rod (61) hinged to the tension frame (4) along the thickness direction of the second body (111). When pouring concrete, the swing rod (61) can be swingingly switched between a locking position within the projection area of the second body (111) along its thickness direction and a clearance position leaving the projection area of the second body (111) along its thickness direction; In the locking position, the end of the swing rod (61) can be bolted to the back of the second body (111) away from the first body (101); The second locking mechanism (6) is located at the lower part of the second body (111).

9. The single-station modular pre-stressed stair mold of claim 8, wherein: It also includes a demolding mechanism (7) including a connecting block (71) fixed to the back of the tension frame (4) and a demolding bolt (72) threadedly connected to the second body (111), the end of the demolding bolt (72) being capable of abutting against the connecting block (71) to enable the second body (111) to move away from the tension frame (4).

10. The single-station modular pre-stressed stair mold of claim 9, wherein: It also includes a positioning mechanism (8) including a taper pin (81) and a positioning hole (82) connected to the tension frame (4) and the second body (111) respectively, the taper pin (81) extending along the thickness direction of the side mold (1), and the tip of the taper pin (81) being capable of being inserted into the positioning hole (82) during the process of the second body (111) approaching the tension frame (4).

Images