Modular stair precast panel mold

Abstract

The present application relates to the technical field of stair prefabrication equipment, and particularly relates to a modular stair prefabricated plate mold, a back plate being a rectangular steel plate laid on the ground, and a stair prefabricated plate mold with adjustable step length being spliced on the back plate, comprising a detachable left lower horizontal plate and a right upper L plate spliced on the back plate, and a slope plate spliced between the left lower horizontal plate and the right upper L plate, nine step L plates being spliced above the slope plate in parallel, and a left lower vertical plate being spliced between the left lower horizontal plate and the step L plate at the lowermost left side, the beneficial effects of the present application being that the present application can produce prefabricated stairs with the same step size and height by using the least number of molds and adjusting the splicing of the step L plates, and the thickness of the prefabricated stairs can be ensured to be consistent by adjusting the splicing of the slope plate when adjusting the step size, and the mold of the present application has a lower cost compared with the existing stair prefabricated mold.

Description

Technical Field

[0001] The present invention relates to the technical field of stair prefabrication equipment, and in particular to a modular stair prefabricated panel mould. Background Art

[0002] In existing building designs, stairs generally have a turnaround every 10 steps. At the same height, a suitable staircase is designed by adjusting the length of the steps.

[0003] When it is necessary to make prefabricated stairs with the same height but different step lengths, it is necessary to customize molds of different sizes to cast and vibrate the prefabricated stairs, which is costly and cumbersome.

[0004] To this end, the present application designs a modular stair prefabricated panel mold to solve the above problems. Summary of the Invention

[0005] In order to make up for the deficiencies in the prior art, the present invention provides a modular stair prefabricated panel mould.

[0006] The present invention is achieved through the following technical solutions:

[0007] A modular stair prefabricated panel mould, including a back panel, is characterized by:

[0008] The back panel is a rectangular steel plate placed flat on the ground, on which a prefabricated staircase panel mold with adjustable step length is spliced, including a lower left horizontal panel and an upper right L-panel that are detachably plugged into the back panel, an inclined panel is plugged between the lower left horizontal panel and the upper right L-panel, 9 step L-panels are plugged above and parallel to the inclined panel, and a lower left vertical panel is plugged between the lower left step L-panel and the lower left horizontal panel.

[0009] Furthermore, in order to better implement the present invention, a rectangular through slot is opened on the lower left side of the back plate as a movable slot for the lower left horizontal plate. The length of the movable slot for the lower left horizontal plate is greater than the length of the lower left horizontal plate. A limiting block is movably connected to the movable slot for the lower left horizontal plate. One side of the limiting block is fixedly connected to the limiting screw hole on one side of the movable slot for the lower left horizontal plate by a bolt. The left lower horizontal plate adjusts its left and right position in the movable slot for the lower left horizontal plate through the limiting block.

[0010] An L-shaped through slot is provided on the upper right side of the back plate as a right upper L-plate fixing slot, and the right upper L-plate is inserted into the right upper L-plate fixing slot.

[0011] Furthermore, in order to better realize the present invention, the lower left horizontal plate is a rectangular plate as a whole, and four rectangular long slots are evenly opened on its left side as the first adjustment slot of the lower left horizontal plate, and four parallelogram long slots are evenly opened on its right side as the second adjustment slot of the lower left horizontal plate; the lower left vertical plate is inserted into the first adjustment slot of the lower left horizontal plate, and one end of the oblique plate is inserted into the second adjustment slot of the lower left horizontal plate; the lower left horizontal plate rectangular filling block is detachably inserted into the first adjustment slot of the lower left horizontal plate, and the lower left horizontal plate parallelogram filling block is detachably inserted into the second adjustment slot of the lower left horizontal plate.

[0012] Furthermore, in order to better realize the present invention, the upper right L-plate is L-shaped, and four rectangular long slots are evenly opened on its left side as the first adjustment slot of the upper right L-plate, and four parallelogram long slots are evenly opened on its right side as the second adjustment slot of the upper right L-plate; the step L-plate is inserted into the first adjustment slot of the upper right L-plate, and the other end of the inclined plate is inserted into the second adjustment slot of the upper right L-plate; the step L-plate filling block is detachably inserted into the first adjustment slot of the upper right L-plate, and the upper right L-plate parallelogram filling block is detachably inserted into the second adjustment slot of the upper right L-plate.

[0013] Furthermore, in order to better realize the present invention, four sets of the lower left horizontal plate and the upper right L-plate are provided, and the parallelogram angles of the second adjustment groove of the lower left horizontal plate and the second adjustment groove of the upper right L-plate of each set are different. Correspondingly, 4 sets of sizes of parallelogram filling blocks of the lower left horizontal plate and the parallelogram filling blocks of the upper right L-plate are also provided.

[0014] Furthermore, in order to better implement the present invention, a first positioning groove of the left lower vertical plate is opened on one side of the bottom of the left lower vertical plate, and a second positioning groove of the left lower vertical plate is opened on the other side. The first positioning groove of the left lower vertical plate is plugged into the first adjustment groove of the left lower horizontal plate, and the second positioning groove of the left lower vertical plate is plugged into the step L plate; a left lower vertical plate positioning column is raised on one side of the left lower vertical plate near the first positioning groove of the left lower vertical plate, and the left lower vertical plate positioning column is tightly attached to the left lower horizontal plate.

[0015] Furthermore, in order to better realize the present invention, the step L-plate is L-shaped, and four rectangular long grooves are opened on one side of the formed stair tread as step L-plate adjustment grooves, and a step L-plate positioning groove is opened on the side of the formed stair floor height. The step L-plate positioning groove is inserted into the step L-plate adjustment groove of another adjacent step L-plate, and a step L-plate filling block is detachably inserted into the step L-plate adjustment groove.

[0016] Furthermore, in order to better realize the present invention, a step L-plate filling block anti-seepage plate is provided on the rear side of the step L-plate filling block, and the protruding part of the step L-plate filling block anti-seepage plate is abutted against the rear side of the upper right L-plate and the rear side of the step L-plate, and a step L-plate filling block extension top cover is provided on the top of the step L-plate filling block, and the step L-plate filling block extension top cover is fixedly connected to the upper right L-plate and the step L-plate by bolts; the structure of the rectangular filling block of the lower left horizontal plate is arranged in a front-to-back mirror symmetry with the structure of the step L-plate filling block; the A left lower horizontal plate parallelogram filling block anti-seepage plate is provided on the front side of the left lower horizontal plate parallelogram filling block, and the protruding part of the left lower horizontal plate parallelogram filling block anti-seepage plate is abutted against the front side of the left lower horizontal plate, and a left lower horizontal plate parallelogram filling block extended top cover is provided on the top of the left lower horizontal plate parallelogram filling block anti-seepage plate, and the left lower horizontal plate parallelogram filling block extended top cover is fixed to the left lower horizontal plate by bolts; the structure of the upper right L-plate parallelogram filling block is the same as that of the lower horizontal plate parallelogram filling block, but the size is different.

[0017] The beneficial effects of the present invention are:

[0018] This invention uses a minimal number of molds and adjusts the interlocking of the L-shaped staircase plates to create prefabricated stairs with varying tread sizes and the same floor height. Adjusting the tread size by adjusting the interlocking of the inclined plates ensures consistent thickness of the prefabricated stairs. The molds of this invention are more cost-effective than existing prefabricated staircase molds. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 Schematic diagram of the three-dimensional structure of the back plate of the present invention;

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the lower left horizontal plate of the present invention;

[0022] Figure 4 Schematic diagram of the three-dimensional structure of the upper right L-plate of the present invention;

[0023] Figure 5 Schematic diagram of the three-dimensional structure of the lower left vertical plate of the present invention;

[0024] Figure 6 Schematic diagram of the three-dimensional structure of the step L-plate of the present invention;

[0025] Figure 7 Schematic diagram of the three-dimensional structure of the step L-plate filling block of the present invention;

[0026] Figure 8 This is a schematic diagram of the three-dimensional structure of the rectangular filling block of the lower left horizontal plate of the present invention;

[0027] Figure 9 Schematic diagram of the three-dimensional structure of the parallelogram filling block of the lower left horizontal plate of the present invention;

[0028] Figure 10 The upper right L-plate parallelogram filling block of the present invention;

[0029] In the figure,

[0030] 1. Back panel, 2. Lower left horizontal panel, 3. Upper right L-panel, 4. Inclined panel, 5. Lower left vertical panel, 6. Step L-panel, 101. Lower left horizontal panel movable slot, 102. Upper right L-panel fixed slot, 103. Limiting block, 104. Limiting screw hole, 201. First adjustment slot of lower left horizontal panel, 202. Second adjustment slot of lower left horizontal panel, 301. First adjustment slot of upper right L-panel, 302. Second adjustment slot of upper right L-panel, 501. First positioning slot of lower left vertical panel, 502. Second positioning slot of lower left vertical panel, 503. Positioning column of lower left vertical panel, 601. Adjustment slot of step L-panel, 602. Positioning slot of step L-panel, 6011. Step L-panel Filling block, 6012, step L-plate filling block extended top cover, 6013, step L-plate filling block anti-seepage plate, 2011, lower left horizontal plate rectangular filling block, 2012, lower left horizontal plate rectangular filling block extended top cover, 2013, lower left horizontal plate rectangular filling block anti-seepage plate, 2021, lower left horizontal plate parallelogram filling block, 2022, lower left horizontal plate parallelogram filling block extended top cover, 2023, lower left horizontal plate parallelogram filling block anti-seepage plate, 3021, upper right L-plate parallelogram filling block, 3022 upper right L-plate parallelogram filling block extended top cover, 3023, upper right L-plate parallelogram filling block anti-seepage plate. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in a variety of different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely intended to represent selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0034] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended solely to facilitate and simplify the description of the present invention and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," etc., etc., are used solely for distinction and should not be construed as indicating or implying relative importance.

[0035] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0036] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections. They may refer to mechanical connections or electrical connections. They may refer to connections directly or indirectly through an intermediary, or they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0037] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0038] Figures 1-10 A specific embodiment of the present invention is a modular stair prefabricated panel mold. Figure 1 As shown, the back panel 1 is a rectangular steel plate placed flat on the ground, on which a prefabricated staircase panel mold with adjustable step length is spliced, including a lower left horizontal panel 2 and an upper right L-panel 3 that are detachably plugged into the back panel 1, an inclined panel 4 is plugged between the lower left horizontal panel 2 and the upper right L-panel 3, and 9 step L-panels 6 are plugged above and parallel to the inclined panel 4, and a lower left vertical panel 5 is plugged between the lower left step L-panel 6 and the lower left horizontal panel 2.

[0039] like Figure 2As shown, a rectangular through groove is opened on the lower left side of the back panel 1 as a movable slot 101 for the lower left horizontal panel, and the length of the movable slot 101 for the lower left horizontal panel is greater than the length of the lower left horizontal panel 2. A limiting block 103 is movably connected in the movable slot 101 of the lower left horizontal panel, and one side of the limiting block 103 is fixedly connected to the limiting screw hole 104 on one side of the movable slot 101 of the lower left horizontal panel by a bolt, and the lower left horizontal panel 2 adjusts its left and right positions in the movable slot 101 of the lower left horizontal panel through the limiting block 103; an L-shaped through groove is opened on the upper right side of the back panel 1 as a fixing slot 102 for the upper right L panel, and the upper right L panel 3 is inserted into the fixing slot 102 for the upper right L panel.

[0040] like Figure 3 As shown, the lower left horizontal plate 2 is a rectangular plate as a whole, and four rectangular long slots are evenly opened on its left side as the first adjustment slot 201 of the lower left horizontal plate, and four parallelogram long slots are evenly opened on its right side as the second adjustment slot 202 of the lower left horizontal plate; the lower left vertical plate 5 is inserted into the first adjustment slot 201 of the lower left horizontal plate, and one end of the oblique plate 4 is inserted into the second adjustment slot 202 of the lower left horizontal plate; the lower left horizontal plate rectangular filling block 2011 is detachably inserted into the first adjustment slot 201 of the lower left horizontal plate, and the lower left horizontal plate parallelogram filling block 2021 is detachably inserted into the second adjustment slot 202 of the lower left horizontal plate.

[0041] like Figure 4 As shown, the upper right L-plate 3 is L-shaped, with four rectangular long slots evenly opened on its left side as the first adjustment slot 301 of the upper right L-plate, and four parallelogram long slots evenly opened on its right side as the second adjustment slot 302 of the upper right L-plate; the step L-plate 6 is inserted into the first adjustment slot 301 of the upper right L-plate, and the other end of the inclined plate 4 is inserted into the second adjustment slot 302 of the upper right L-plate; the step L-plate filling block 6011 is detachably inserted into the first adjustment slot 301 of the upper right L-plate, and the upper right L-plate parallelogram filling block 3021 is detachably inserted into the second adjustment slot 302 of the upper right L-plate.

[0042] In addition, in order to ensure that the thickness of the stairs remains unchanged, four sets of the lower left horizontal plate 2 and the upper right L-plate 3 are provided. The parallelogram angles of the second adjustment groove 202 of the lower left horizontal plate and the second adjustment groove 302 of the upper right L-plate in each set are different. Correspondingly, four sets of sizes of the lower left horizontal plate parallelogram filling blocks 2021 and the upper right L-plate parallelogram filling blocks 3021 are also provided.

[0043] like Figure 5 As shown, a first positioning groove 501 of the lower left vertical plate is opened on one side of the bottom of the lower left vertical plate 5, and a second positioning groove 502 of the lower left vertical plate is opened on the other side. The first positioning groove 501 of the lower left vertical plate is plugged into the first adjustment groove 201 of the lower left horizontal plate, and the second positioning groove 502 of the lower left vertical plate is plugged into the step L plate 6; a lower left vertical plate positioning column 503 is raised on one side of the lower left vertical plate 5 near the first positioning groove 501 of the lower left vertical plate, and the lower left vertical plate positioning column 503 is close to the lower left horizontal plate 2.

[0044] like Figure 6 As shown, the step L-plate 6 is L-shaped, and one side of the formed stair tread is provided with four rectangular long slots as step L-plate adjustment slots 601, and one side of the formed stair height is provided with a step L-plate positioning slot 602. The step L-plate positioning slot 602 is inserted into the step L-plate adjustment slot 601 of another adjacent step L-plate 6, and a step L-plate filling block 6011 is detachably inserted into the step L-plate adjustment slot 601.

[0045] like Figure 7 Figure 8 Figure 9 Figure 10 As shown, the rear side of the step L-plate filling block 6011 is provided with a step L-plate filling block anti-seepage plate 6013, the protruding part of the step L-plate filling block anti-seepage plate 6013 is abutted against the rear side of the upper right L-plate 3 and the rear side of the step L-plate 6, and the top of the step L-plate filling block 6011 is provided with a step L-plate filling block extension top cover 6012, which is fixedly connected to the upper right L-plate 3 and the step L-plate 6 by bolts; the structure of the rectangular filling block 2011 of the lower left horizontal plate is mirror-symmetrical to the structure of the step L-plate filling block 6011; the parallelogram of the lower left horizontal plate is arranged The front side of the rectangular filling block 2021 is provided with a left lower horizontal plate parallelogram filling block anti-seepage plate 2023, and the protruding part of the left lower horizontal plate parallelogram filling block anti-seepage plate 2023 is abutted against the front side of the left lower horizontal plate 2, and the top of the left lower horizontal plate parallelogram filling block anti-seepage plate 2023 is provided with a left lower horizontal plate parallelogram filling block extended top cover 2022, and the left lower horizontal plate parallelogram filling block extended top cover 2022 is fixedly connected to the left lower horizontal plate 2 by bolts; the structure of the upper right L-plate parallelogram filling block 3021 is the same as that of the lower horizontal plate parallelogram filling block 2021, but the size is different.

[0046] The specific usage of this embodiment is:

[0047] like Figure 1 As shown, the state is the mold connection method when the step size is the widest, wherein the lower left horizontal plate 2 is placed on the leftmost side of the lower left horizontal plate movable slot 101 and is limited by the limit block 103. In order to prevent leakage, filling blocks are installed on the adjustment grooves on the step L plate 6, the lower left horizontal plate 2 and the upper right L plate 3.

[0048] When it is necessary to make a prefabricated staircase with a smaller step size, select another set of lower left horizontal plate 2 and upper right L plate 3, install the lower left horizontal plate 2 in the predetermined position of the movable slot 101 of the lower left horizontal plate, and limit it through the limit block 103 to ensure that the inclined plate 4 can be plugged into the lower left horizontal plate 2 and the upper right L plate 3, and then adjust the plug-in position of the step L plate, for example, plug the step L plate positioning slot 602 into the adjacent right step L plate adjustment slot 601, so that the step size can be reduced without changing the floor height or the thickness of the stairs.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and are not limiting. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A modular prefabricated staircase panel mould, comprising a back panel (1), characterized in that: The back plate (1) is a rectangular steel plate placed flat on the ground, on which a stair prefabricated plate mold with adjustable step length is spliced, comprising a lower left horizontal plate (2) and an upper right L plate (3) detachably plugged into the back plate (1), an inclined plate (4) plugged between the lower left horizontal plate (2) and the upper right L plate (3), nine step L plates (6) plugged above and parallel to the inclined plate (4), and a lower left vertical plate (5) plugged between the lower left step L plate (6) and the lower left horizontal plate (2); A rectangular through slot is provided on the lower left side of the back plate (1) as a movable slot (101) of the lower left transverse plate. The length of the movable slot (101) of the lower left transverse plate is greater than the length of the lower left transverse plate (2). A limiting block (103) is movably connected in the movable slot (101) of the lower left transverse plate. One side of the limiting block (103) is fixedly connected to a limiting screw hole (104) on one side of the movable slot (101) of the lower left transverse plate by a bolt. The left lower transverse plate (2) adjusts its left and right position in the movable slot (101) of the lower left transverse plate through the limiting block (103); An L-shaped through groove is provided on the upper right side of the back plate (1) as a right upper L-plate fixing groove (102), and the right upper L-plate (3) is inserted into the right upper L-plate fixing groove (102); The lower left horizontal plate (2) is a rectangular plate as a whole, and has four rectangular long slots evenly opened on its left side as the first adjustment slots (201) of the lower left horizontal plate, and four parallelogram long slots evenly opened on its right side as the second adjustment slots (202) of the lower left horizontal plate; the lower left vertical plate (5) is inserted into the first adjustment slot (201) of the lower left horizontal plate, and one end of the oblique plate (4) is inserted into the second adjustment slot (202) of the lower left horizontal plate; the rectangular filling block (211) of the lower left horizontal plate is detachably inserted into the first adjustment slot (201) of the lower left horizontal plate, and the parallelogram filling block (221) of the lower left horizontal plate is detachably inserted into the second adjustment slot (202) of the lower left horizontal plate; The upper right L-plate (3) is L-shaped, with four rectangular long slots evenly opened on its left side as the upper right L-plate first adjustment slots (301), and four parallelogram long slots evenly opened on its right side as the upper right L-plate second adjustment slots (302); the step L-plate (6) is inserted into the upper right L-plate first adjustment slot (301), and the other end of the inclined plate (4) is inserted into the upper right L-plate second adjustment slot (302); the step L-plate filling block (6011) is detachably inserted into the upper right L-plate first adjustment slot (301), and the upper right L-plate parallelogram filling block (3021) is detachably inserted into the upper right L-plate second adjustment slot (302).

2. The modular stair prefabricated panel mold according to claim 1, characterized in that: Four sets of the lower left horizontal plate (2) and the upper right L-plate (3) are provided, and the parallelogram angles of the second adjustment slot (202) of the lower left horizontal plate and the second adjustment slot (302) of the upper right L-plate in each set are different. Correspondingly, four sets of lower left horizontal plate parallelogram filling blocks (2021) and upper right L-plate parallelogram filling blocks (3021) of different sizes are also provided.

3. The modular stair prefabricated panel mold according to claim 1, characterized in that: A first positioning groove (501) of the left lower vertical plate is formed on one side of the bottom of the left lower vertical plate (5), and a second positioning groove (502) of the left lower vertical plate is formed on the other side. The first positioning groove (501) of the left lower vertical plate is plugged into the first adjustment groove (201) of the left lower horizontal plate, and the second positioning groove (502) of the left lower vertical plate is plugged into the step L plate (6). A left lower vertical plate positioning column (503) is protruded from one side of the left lower vertical plate (55) near the first positioning groove (501) of the left lower vertical plate, and the left lower vertical plate positioning column (503) is closely attached to the left lower horizontal plate (2).

4. The modular stair prefabricated panel mold according to claim 3, characterized in that: The step L-plate (6) is L-shaped, and one side of the step L-plate forming the stair tread is provided with four rectangular long notches as step L-plate adjustment slots (601), and one side of the step L-plate forming the stair height is provided with a step L-plate positioning slot (602), the step L-plate positioning slot (602) being inserted into the step L-plate adjustment slot (601) of another adjacent step L-plate (6), and a step L-plate filling block (6011) being detachably inserted into the step L-plate adjustment slot (601).

5. The modular stair prefabricated panel mold according to claim 1, characterized in that: A step L-plate filling block anti-seepage plate (6013) is provided on the rear side of the step L-plate filling block (6011), and a protruding portion of the step L-plate filling block anti-seepage plate (6013) is abutted against the rear side of the upper right L-plate (3) and the rear side of the step L-plate (6). A step L-plate filling block extension top cover (6012) is provided on the top of the step L-plate filling block (6011), and the step L-plate filling block extension top cover (6012) is fixedly connected to the upper right L-plate (3) and the step L-plate (6) by bolts. The structure of the rectangular filling block (2011) of the lower left horizontal plate and the structure of the step L-plate filling block (6011) are arranged in a front-to-back mirror-symmetrical manner; A left lower horizontal plate parallelogram filling block anti-seepage plate (223) is provided on the front side of the left lower horizontal plate parallelogram filling block (2021); a protruding portion of the left lower horizontal plate parallelogram filling block anti-seepage plate (2023) is abutted against the front side of the left lower horizontal plate (2); a left lower horizontal plate parallelogram filling block extension top cover (222) is provided on the top of the left lower horizontal plate parallelogram filling block anti-seepage plate (2023); and the left lower horizontal plate parallelogram filling block extension top cover (2022) is fixedly connected to the left lower horizontal plate (2) by bolts; The structure of the upper right L-plate parallelogram filling block (3021) is the same as that of the lower horizontal plate parallelogram filling block (2021), but the size is different.

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