Die for concrete prefabricated stairs

Abstract

The utility model relates to the technical field of stair manufacturing, in particular to a mould for a concrete prefabricated stair. Comprising a first template body, a second template body is arranged on one side of the first template body, lock catches are symmetrically and fixedly connected to the two sides of the second template body, the second template body and the first template body are clamped and fixed through the lock catches, two partition plates are arranged in the first template body, and the two sides of each partition plate make contact with the inner wall of the first template body and the inner wall of the second template body respectively. Inserting rods are fixedly connected to the positions, close to the upper ends, of the two sides of the partition plate, and a plurality of inserting grooves are formed in the tops of the first template and the second template in a linear array mode. After the distance between the two partition plates is adjusted, the two partition plates are installed between the first formwork and the second formwork, a small pouring cavity is formed among the two partition plates, the inner wall of the first formwork and the inner wall of the second formwork, concrete is poured into the small pouring cavity, a stair with the specified length and width can be manufactured, and use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of staircase manufacturing, and more specifically, to a mold for precast concrete staircases. Background Technique

[0002] A beam-type staircase refers to a type of staircase where the treads of the flight are directly placed on the inclined beams, and the inclined beams are placed on the staircase beams at both ends of the flight. A beam-type staircase is a reinforced concrete staircase with inclined beams, which consists of treads, inclined beams, landing beams, and landing plates; the treads are supported on the inclined beams; the inclined beams and landing plates are supported on the landing beams; the landing beams are supported on load-bearing walls or other load-bearing structures. Beam-type staircases are generally applicable to medium and large-sized staircases.

[0003] When manufacturing a beam-type staircase, it is often necessary to use a mold for production. Generally, the production method is to pour concrete inside the mold. After the concrete solidifies, the workers then remove the mold to obtain a section of concrete staircase. However, during the manufacturing process of precast staircases, due to the different site conditions at the construction site, the specific widths and lengths of the staircases used are also different. Existing molds are difficult to manufacture staircases with specified lengths and widths. In view of this, we propose a mold for precast concrete staircases. Summary of the Invention

[0004] The purpose of the present utility model is to provide a mold for precast concrete staircases to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, one of the purposes of the present utility model is to provide a mold for precast concrete staircases, including a first template. A second template is arranged on one side of the first template. Two locking buckles are symmetrically and fixedly connected to both sides of the second template. The second template is clamped and fixed to the first template through the locking buckles. Two partition plates are arranged inside the first template. Both sides of the partition plates are in contact with the inner walls of the first template and the second template respectively. Insertion rods are fixedly connected to positions near the upper ends of both sides of the partition plates. A plurality of slots are linearly arranged on the tops of the first template and the second template. The two insertion rods on both sides of the partition plates are slidably arranged inside the slots at corresponding positions. A pressing mechanism is arranged on one side of the first template. When the pressing mechanism applies a downward pressure to the insertion rods, the lower ends of the partition plates press down on the bottom surface inside the first template.

[0006] As a further improvement of the technical solution, the pressing mechanism includes two end plates fixedly connected to one side of the first template. A guide rod is fixedly connected to the upper surface of the end plate. A cross beam is slidably sleeved on the side walls of the two guide rods. A spring is fixedly connected between the guide rod and the end plate. The spring is sleeved outside the guide rod. A plurality of pin plates slidably penetrate through the side wall of the cross beam in a linear array. A plurality of through slots are linearly arrayed on one side of the first template. The plurality of through slots are respectively communicated with a plurality of slots opened on the first template. A keyhole is opened at the position of the side wall of the insertion rod located in the through slot. The keyhole is slidably sleeved outside one of the pin plates.

[0007] As a further improvement of the technical solution, the spring is in an elastically stretched state. When the spring rebounds, it drives the cross beam to move towards the end plate, so that the cross beam applies a downward pressure on one of the insertion rods through the pin plate.

[0008] As a further improvement of the technical solution, two extension frames are fixedly connected to one side of the first template. A right-angled plate is rotatably connected to the extension frame. The horizontal section of the right-angled plate is arranged below the cross beam. A grip rod is fixedly connected between the upper ends of the two right-angled plates.

[0009] As a further improvement of the technical solution, a limiting frame is fixedly connected to the top of the extension frame. When the right-angled plate rotates to the position where it contacts the inner wall of the limiting frame, the horizontal section of the right-angled plate pushes the cross beam upward, so that the pin plate and the keyhole are at the same height.

[0010] As a further improvement of the technical solution, a plurality of steel bars are arranged between the two partition plates. The two ends of the steel bars respectively penetrate through the side walls of the two partition plates. An end cover is threadedly connected to one side of the partition plate close to the lock. The inner wall of the end cover contacts one end of the steel bar.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] 1. For the mold for precast concrete stairs, after adjusting the distance between the two partition plates, the two partition plates are installed at the position between the first template and the second template, so that a small pouring cavity is formed between the inner walls of the two partition plates, the first template and the second template. By pouring concrete into the small pouring cavity, stairs with specified length and width can be made, which is convenient to use.

[0013] 2. For the mold for precast concrete stairs, after the partition plate is installed at the position between the first template and the second template, a downward pressure is applied to the partition plate through the pressing mechanism, so that the lower end of the partition plate presses down the inner bottom surface of the first template, thereby enhancing the sealing performance between the partition plate and the inner bottom surface of the first template, and preventing the concrete in the small pouring cavity from leaking out and affecting the pouring quality of the stairs. Description of the Drawings

[0014] Figure 1 Schematic diagram of the overall structure of the present utility model;

[0015] Figure 2 Cross-sectional view of the present utility model;

[0016] Figure 3 Schematic diagram of the partition board and steel bars of the present utility model;

[0017] Figure 4 Schematic diagram of the partial structure of the present utility model;

[0018] Figure 5 Schematic diagram of the pressing mechanism of the present utility model;

[0019] Figure 6 Schematic diagram of the pin plate and keyhole of the present utility model;

[0020] Figure 7 Schematic diagram of the extension frame, right-angle plate and limit frame of the present utility model;

[0021] Figure 8 Exploded structure diagram of the extension frame, right-angle plate and limit frame of the present utility model.

[0022] The meanings of each label in the figure are as follows:

[0023] 1. First template; 2. Second template; 3. Lock; 4. Partition board; 41. Insert rod; 411. Keyhole; 42. Slot; 5. Steel bar;

[0024] 6. Pressing mechanism; 61. Guide rod; 62. Cross beam; 63. Spring; 64. Pin plate; 65. Through slot; 66. Extension frame; 67. Right-angle plate; 68. Limit frame. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. Embodiment

[0026] Please refer to Figures 1-8As shown in the figure, one of the purposes of this embodiment is to provide a mold for precast concrete stairs, which includes a first template 1. A second template 2 is arranged on one side of the first template 1. The first template 1 is of an L-shaped structure. The upper surface of the horizontal section of the first template 1 is the bottom surface inside the first template 1. The second template 2 is in contact with the bottom surface inside the first template 1. The vertical section of the first template 1 and the second template 2 are both vertically arranged. Symmetrically fixed connections of buckles 3 are provided on both sides of the second template 2. The second template 2 is clamped and fixed to the first template 1 through the buckles 3, so that both sides of the second template 2 are closely attached to the first template 1. The space between the inner walls of the first template 1 and the second template 2 is set as a large casting cavity. After pouring concrete into the large casting cavity, the concrete solidifies to form a precast stair. By adjusting the amount of concrete poured into the large casting cavity and changing the height of the concrete in the large casting cavity, a precast stair with a specified width can be made. After releasing the clamping and fixing of the buckle 3 to the first template 1 and splitting the second template 2 from the first template 1, the made precast stair can be taken out from the inside of the first template 1.

[0027] To make precast stairs with a specified length, referring to Figure 1 and Figure 2 , two partition plates 4 are arranged inside the first template 1. Both sides of the partition plates 4 are in contact with the inner walls of the first template 1 and the second template 2 respectively. The space between the two partition plates 4 in the large casting cavity is set as a small casting cavity. By adjusting the distance between the two partition plates 4 according to the length of the stairs to be made and changing the size of the space of the small casting cavity, then pouring concrete into the small casting cavity, the length of the precast stair formed by the solidification of the concrete is the distance between the two partition plates 4. The width of the stair can be adjusted by changing the height of the concrete in the small casting cavity, so as to make precast stairs with specified length and width.

[0028] To fix the partition plates 4 inside the large casting cavity after adjusting the distance between the two partition plates 4, insertion rods 41 are fixedly connected to positions near the upper ends of both sides of the partition plates 4. A number of slots 42 are linearly arranged at the tops of the first template 1 and the second template 2. The two insertion rods 41 on both sides of the partition plates 4 are both slidably arranged inside the slots 42 at corresponding positions, so as to limit the horizontal movement of the partition plates 4 inside the large casting cavity. The lower ends of the partition plates 4 are in contact with the bottom surface inside the first template 1, making the small casting cavity a stable cavity with an open top. The small casting cavity can limit the flow of the concrete inside it, and then make the stairs.

[0029] When manufacturing precast stairs, to enhance the structural strength of the precast stairs, steel bars 5 need to be embedded in the concrete stairs. The two ends of the steel bars 5 also need to protrude from both ends of the stairs for connecting other concrete forms. To achieve this effect, several steel bars 5 are arranged between two partitions 4. The two ends of the steel bars 5 respectively penetrate the side walls of the two partitions 4. A end cap is threadedly connected to the side of the partition 4 close to the lock 3. The inner wall of the end cap contacts one end of the steel bar 5. Before fixing the partition 4 inside the large casting cavity, cut multiple steel bars 5 of equal length according to the length of the stairs. Pass the two ends of the steel bar 5 through the side walls of the two partitions 4 respectively, so that the two ends of the steel bar 5 respectively contact the two end caps. The two end caps restrict the horizontal movement of the steel bar 5 between the two partitions 4. After installing an appropriate number of steel bars 5 from bottom to top at the position between the two partitions 4 according to the width of the stairs, fix the two partitions 4 inside the large casting cavity, and then fix the steel bars 5 inside the large casting cavity. When pouring concrete into the small casting cavity, make the height of the concrete higher than the uppermost steel bar 5. The stairs formed after the concrete solidifies wrap around the outside of the steel bar 5, increasing the structural strength of the stairs. The two ends of the steel bar 5 protrude from the stairs, facilitating the connection of the stairs to other concrete forms.

[0030] To enhance the sealing performance between the lower surface of the partition 4 and the bottom surface inside the first form 1, a pressing mechanism 6 is provided on one side of the first form 1. The structure of the pressing mechanism 6 is refined as follows. Refer to Figures 4-8, the pressing mechanism 6 includes two end plates fixedly connected to one side of the first template 1. A guide rod 61 is fixedly connected to the upper surface of the end plate. A cross beam 62 is slidably sleeved on the side walls of the two guide rods 61. The guide rods 61 are vertically arranged, so that the cross beam 62 can only move vertically along the outer wall of the guide rod 61. A spring 63 is fixedly connected between the guide rod 61 and the end plate. The spring 63 is sleeved outside the guide rod 61. A number of pin plates 64 are slidably penetrated through the side wall of the cross beam 62 in a linear array. A number of through slots 65 are linearly arrayed on one side of the first template 1. The number of through slots 65 are respectively communicated with a number of slots 42 opened on the first template 1. When the insertion rod 41 is inserted into the inside of the slot 42 and the partition plate 4 contacts the bottom surface inside the first template 1, the lower end of the insertion rod 41 extends into the inside of the through slot 65. A keyhole 411 is opened at the position of the side wall of the insertion rod 41 located in the through slot 65. When the keyhole 411 is slidably sleeved outside one of the pin plates 64, the pin plate 64 moves vertically, and the insertion rod 41 can be driven to move vertically synchronously through the keyhole 411. At this time, the spring 63 is in an elastically stretched state. The elastic force of the spring 63 rebounding drives the cross beam 62 to move towards the end plate, so that the cross beam 62 applies a downward pressure on one of the insertion rods 41 through the pin plate 64. The insertion rod 41 under pressure presses the partition plate 4 downward, so as to ensure that the gap between the lower end of the partition plate 4 and the inner bottom surface of the first template 1 is as small as possible, enhance the sealing performance between the partition plate 4 and the inner bottom surface of the first template 1, and prevent the concrete in the small pouring cavity from leaking out, affecting the quality of the staircase pouring.

[0031] To facilitate inserting the pin plate 64 into the keyhole 411, two extension frames 66 are fixedly connected to one side of the first template 1. A right-angle plate 67 is rotatably connected to the extension frame 66. The horizontal section of the right-angle plate 67 is arranged below the cross beam 62. A grip rod is fixedly connected between the upper ends of the two right-angle plates 67. When the grip rod is turned downward, the two right-angle plates 67 rotate synchronously. After the horizontal section of the rotating right-angle plate 67 contacts the cross beam 62, it pushes the cross beam 62 upward, so that the spring 63 is elastically stretched. The cross beam 62 drives the pin plate 64 to move synchronously. A limit frame 68 is fixedly connected to the top of the extension frame 66. When the right-angle plate 67 rotates to the position where it contacts the inner wall of the limit frame 68, the pin plate 64 moves vertically upward to the same height as the keyhole 411. Push the pin plate 64 towards the insertion rod 41, and the pin plate 64 can be inserted into the keyhole 411. Then release the grip rod, and the elastic force of the spring 63 rebounding can drive the cross beam 62 to move downward. The insertion rod 41 under pressure presses the partition plate 4 downward, enhancing the sealing performance between the partition plate 4 and the inner bottom surface of the first template 1.

[0032] The above has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only the preferred examples of the present utility model and are not used to limit the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A mold for a prefabricated concrete staircase, comprising a first mold (1), a second mold (2) being arranged on one side of the first mold (1), locking buckles (3) being symmetrically fixedly connected on both sides of the second mold (2), the second mold (2) being fixedly connected to the first mold (1) by the locking buckles (3), and characterized in that: Two partitions (4) are arranged inside the first template (1), and the two sides of the partition (4) are in contact with the inner walls of the first template (1) and the second template (2) respectively. Insertion rods (41) are fixedly connected to the positions near the upper ends of the two sides of the partition (4). The tops of the first template (1) and the second template (2) are both provided with a plurality of slots (42) in a linear array. The two insertion rods (41) on the two sides of the partition (4) are both slidably arranged inside the slots (42) at corresponding positions. A pressing mechanism (6) is arranged on one side of the first template (1). When the pressing mechanism (6) applies downward pressure to the insertion rod (41), the lower end of the partition (4) presses downwardly the bottom surface inside the first template (1).

2. The mold for precast concrete stairs according to claim 1, characterized in that: The pressing mechanism (6) comprises two end plates fixedly connected to one side of the first template (1), the upper surface of the end plate being fixedly connected to a guide rod (61), the side walls of the two guide rods (61) being slidably sleeved with a crossbeam (62), a spring (63) being fixedly connected between the guide rod (61) and the end plate, the spring (63) being sleeved on the outside of the guide rod (61), a plurality of pin plates (64) slidingly penetrating the side wall of the crossbeam (62) in a linear array, a plurality of through slots (65) being provided in a linear array on one side of the first template (1), the plurality of through slots (65) being respectively connected to a plurality of slots (42) provided on the first template (1), a keyhole (411) being provided at a position of the side wall of the insertion rod (41) located in the through slot (65), the keyhole (411) being slidably sleeved on the outside of one of the pin plates (64).

3. The mold for precast concrete stairs according to claim 2, characterized in that: The spring (63) is in an elastically stretched state. When the spring (63) rebounds, it drives the crossbeam (62) to move in a direction close to the end plate, so that the crossbeam (62) applies downward pressure to one of the insertion rods (41) through the pin plate (64).

4. The mold for precast concrete stairs according to claim 2, characterized in that: Two extension frames (66) are fixedly connected to one side of the first template (1), a right-angle plate (67) is rotatably connected to the extension frame (66), a horizontal section of the right-angle plate (67) is arranged below the crossbeam (62), and a gripping rod is fixedly connected between the upper ends of the two right-angle plates (67).

5. The mold for precast concrete stairs according to claim 4, characterized in that: The top of the extension frame (66) is fixedly connected to the limiting frame (68). When the right-angle plate (67) rotates to a position in contact with the inner wall of the limiting frame (68), the horizontal section of the right-angle plate (67) pushes the crossbeam (62) to move upward, so that the pin plate (64) and the keyhole (411) are at the same height.

6. The mold for precast concrete stairs according to claim 1, characterized in that: A plurality of steel bars (5) are arranged between the two partitions (4), and the two ends of the steel bars (5) respectively penetrate the side walls of the two partitions (4). An end cover is threadedly connected to one side of the partition (4) close to the lock buckle (3), and the inner wall of the end cover is in contact with one end of the steel bar (5).

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