CN218928144U - Stair mould and precast concrete member production line - Google Patents

Abstract

The utility model relates to the technical field of concrete members, in particular to a stair mold and a precast concrete member production line. The stair mould includes: the universal mold comprises a base, a stepping mold, a back plate mold, a first end mold and a second end mold; the custom mold comprises a side plate mold, a first platform mold and a second platform mold, wherein a casting cavity is formed by the stepping mold, the back plate mold, the first end mold, the second end mold, the side plate mold, the first platform mold and the second platform mold. According to the utility model, the universal mould is combined with the customizing mould, the universal mould is firm and durable and can be used for multiple times, the customizing mould only needs to be manufactured by using less consumable materials, the adjustable parts in the universal mould can change the mould size, and the customizing mould is matched and customized according to the corresponding size, so that the same stair mould can be applied to stairs of different specifications, the problem of low reuse rate of the vertical stair mould in the prior art is effectively solved, and the manufacturing cost of the stair mould in a single project is effectively reduced.

Description

Stair mould and precast concrete member production line

Technical Field

The utility model relates to the technical field of concrete members, in particular to a stair mold and a precast concrete member production line.

Background

The mould that prefabricated staircase used mainly is horizontal mould and vertical mould, and horizontal stair mould cost is low and be convenient for place the steel reinforcement cage and pour concrete, but occupation of land space is big, and vertical stair mould cost is lower and occupation of land space is less than the horizontal mould, and the part of mould is demolishd through loose-leaf connection in the leading and trailing limit of being convenient for, need not to occupy the driving, and whole consumption man-hour is less and more clean.

At present, stair mould is generally customized, to the stair of different specification sizes need use different moulds, and the size and the structure of mould can't be adjusted, hardly use the mould of customization to the mould limit in single construction project, and then lead to the unable make full use of mould and cause extravagant, therefore current stair mould still has the problem that the reuse rate is low.

Disclosure of Invention

Therefore, the utility model aims to overcome the defect of low reuse rate of the vertical stair mould in the prior art, thereby providing a stair mould and a precast concrete member production line.

In order to solve the above problems, the present utility model provides a stair mold comprising: the universal mold comprises a base, a stepping mold, a back plate mold, a first end mold and a second end mold, wherein the stepping mold and the back plate mold are oppositely arranged on the base; the custom mold comprises a side plate mold, a first platform mold and a second platform mold, wherein the side plate mold is arranged between the step mold and the back plate mold, one end of the step mold and one end of the side plate mold are connected with the first platform mold, the other end of the step mold and the other end of the side plate mold are connected with the second platform mold, the first end mold is connected with the first platform mold, the second end mold is connected with the second platform mold, and the step mold, the back plate mold, the first end mold, the second end mold, the side plate mold, the first platform mold and the second platform mold enclose a pouring cavity.

Optionally, the tread mold comprises a plurality of tread sections which are sequentially arranged, and two adjacent tread sections are detachably connected and have variable connection positions so as to change the tread height of the stair; the side plate mould is arranged between the stepping mould and the back plate mould in a vertically movable way, and the side plate is suitable for vertically moving to change the depth of the pouring cavity; the backboard die is movably arranged on the base.

Optionally, each step section includes first connecting plate, second connecting plate and the third connecting plate of fixed connection in proper order, first connecting plate and third connecting plate parallel arrangement, and the third connecting plate of each step section is changeable with the hookup location of the first connecting plate of adjacent step section.

Optionally, the third connecting plate of each step section is connected with the first connecting plate of the adjacent step section through a plurality of fastening components, a plurality of first fixing holes for a plurality of fastening components to penetrate are formed in the first connecting plate, a plurality of adjusting holes for a plurality of fastening components to penetrate are formed in the third connecting plate, and the fixing positions of the fastening components in the corresponding first fixing holes are variable.

Optionally, the stepping die further comprises a bottom plate, and the bottom end of each stepping joint is detachably arranged on the bottom plate.

Optionally, the stair mould further includes a plurality of extending structures that set up between curb plate mould and bottom plate, and every extending structure has stiff end and removal end, and the top surface fixed connection of stiff end and bottom plate and removal end and the bottom surface fixed connection of curb plate mould, or, remove the top surface fixed connection of end and bottom plate and the bottom surface fixed connection of stiff end and curb plate mould.

Optionally, each telescopic structure includes a fixed section of thick bamboo, movable rod and setting element, is equipped with the mating hole that supplies the movable rod to insert on the fixed section of thick bamboo, and setting element, movable rod and fixed section of thick bamboo cooperation to the vertical position of fixed movable rod.

Optionally, the bottom of each step section is also fixedly provided with a fixing plate, and the connection position of the fixing plate and the bottom plate is changeable.

Optionally, the curb plate mould includes side form board and the support frame of detachable connection, and the bottom surface of side form board cooperates with the top surface of support frame, and side form board and mould and backplate mould cooperation of marking time.

The utility model also provides a precast concrete member production line, which comprises: the stair mould.

The utility model has the following advantages:

1. through general mould and customization mould combination, general mould is durable can multiple use, and the customization mould only needs to use less consumptive material to make, and adjustable part can change the mould size in the general mould, and the customization mould matches the customization according to corresponding size for same stair mould can be applied to the stair of different specifications, need not to make the stair mould of various specifications alone, has effectively solved the problem that vertical stair mould reuse rate is low among the prior art, has effectively reduced the manufacturing cost of stair mould in the single project.

2. The stair mould still includes a plurality of extending structure that set up between curb plate mould and bottom plate, can adjust with extending structure extension or shortening when needs adjusting curb plate mould height, and the adjustment process is simple swift.

3. The bottom surface of the support frame is provided with an upper positioning groove matched with the top of the telescopic structure, the upper surface of the bottom plate is correspondingly provided with a lower positioning groove matched with the lower end of each telescopic structure, the upper positioning groove and the lower positioning groove are of a semicircular structure, and the upper positioning groove and the lower positioning groove are used for positioning the telescopic structure together.

4. The first custom section and the second custom section are custom sections at two ends of the stepping die, the third custom section and the fourth custom section are custom sections at two ends of the back plate die, and all parts are connected through bolts, so that the assembly and the disassembly are convenient.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 shows a right side schematic view of a stair mold according to an embodiment of the present disclosure;

FIG. 2 shows a left side schematic view of the stair mold of FIG. 1;

FIG. 3 shows a schematic bottom view of the stair mold of FIG. 1;

FIG. 4 shows a left side schematic view of a tread mold of the stair mold of FIG. 1;

FIG. 5 shows a right side schematic view of a tread mold of the stair mold of FIG. 1;

FIG. 6 shows a bottom schematic view of a tread mold of the stair mold of FIG. 1;

FIG. 7 shows a schematic structural view of a tread segment of the stair mold of FIG. 1;

FIG. 8 shows an enlarged schematic view of a tread segment at A of the stair mold of FIG. 7;

FIG. 9 shows a schematic structural view of the telescoping structure of the stair mold of FIG. 1;

FIG. 10 shows a schematic structural view of a side plate mold of the stair mold of FIG. 1;

fig. 11 shows a schematic structural view of a support frame of the stair mold of fig. 10.

Reference numerals illustrate:

11. a stepping section; 12. a first connection plate; 121. a first fixing hole; 13. a second connecting plate; 14. a third connecting plate; 15. an adjustment aperture; 16. a bottom plate; 161. a slit hole; 162. a lower positioning groove; 17. a fixing plate; 171. a through hole; 18. a first custom section; 19. a second custom section; 20. a back plate mold; 21. a third custom section; 22. a fourth custom section; 30. a side plate mold; 31. a side form; 32. a support frame; 321. an upper positioning groove; 40. a telescopic structure; 41. a fixed cylinder; 42. a moving rod; 43. a positioning piece; 50. a base; 61. a first end mold; 62. a second end die; 70. and fixing the pull rod.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

As shown in fig. 1 to 11, the stair mold of the present embodiment includes: the universal mold comprises a base 50, a stepping mold, a back plate mold 20, a first end mold and a second end mold, wherein the stepping mold and the back plate mold 20 are oppositely arranged on the base 50; the custom mold comprises a side plate mold 30, a first platform mold and a second platform mold, wherein the side plate mold 30 is arranged between the step mold and the back plate mold 20, one end of the step mold and one end of the side plate mold 30 are connected with the first platform mold, the other end of the step mold and the other end of the side plate mold 30 are connected with the second platform mold, the first end mold is connected with the first platform mold, the second end mold is connected with the second platform mold, and the step mold, the back plate mold 20, the first end mold, the second end mold, the side plate mold 30, the first platform mold and the second platform mold enclose a pouring cavity.

The stair mould of this embodiment is applied, through general mould and customization mould combination, general mould is durable can use many times, and the customization mould only needs to use less consumptive material to make, and adjustable part can change the mould size in the general mould, and the customization mould matches the customization according to corresponding size for same stair mould can be applied to the stair of different specifications, need not to make the stair mould of various specifications alone, has effectively solved the problem that vertical stair mould reuse rate is low among the prior art, has effectively reduced the manufacturing cost of stair mould in the single project.

Specifically, the first platform mould includes first custom section 18 and fourth custom section 22, the second platform mould includes second custom section 19 and third custom section 21, first end mould 61 one side and first custom section 18 fixed connection opposite side and fourth custom section 22 fixed connection, second end mould 62 one side and second custom section 19 fixed connection opposite side and third custom section 21 fixed connection, first custom section 18 and second custom section 19 are the custom section at the mould both ends of marking time, third custom section 21 and fourth custom section 22 are the custom section at backplate mould 20 both ends, connect through bolted connection between each part, be convenient for install and dismantle, each custom section can customize according to the required connection structure size at stair both ends.

In this embodiment, the mould of marking time includes a plurality of sections of marking time 11 that set gradually, can dismantle between two adjacent sections of marking time 11 and hookup location is changeable, with the height of marking time that changes the stair, but the setting of curb plate mould 30 vertical migration is between mould of marking time and backplate mould 20, the curb plate is suitable for vertical migration in order to change the degree of depth of pouring the chamber, backplate mould 20 mobilizable setting is on base 50, the hookup location change between the sections of marking time 11 can adjust the height of every step, the width of stair can be adjusted in the vertical removal of curb plate mould 30, backplate mould 20 removes convenient inner structure adjustment installation and convenient drawing of patterns, each adjusting part simple structure and convenient operation. Wherein vertical refers to the "vertical" direction indicated by the arrow in fig. 2.

Specifically, the plurality of tread segments 11 are arranged on the base 50 in the longitudinal direction, and the back plate mold 20 is provided on the base 50 so as to be movable in the lateral direction, wherein the lateral direction refers to the "lateral" direction indicated by the arrow in fig. 2, and the longitudinal direction refers to the "longitudinal" direction indicated by the arrow in fig. 2. The longitudinal direction and the transverse direction are not strictly linear directions, and small-scale adjustment can be performed as needed.

In this embodiment, each of the sections 11 includes a first connecting plate 12, a second connecting plate 13 and a third connecting plate 14 which are sequentially and fixedly connected, the first connecting plate 12 and the third connecting plate 14 are arranged in parallel, the connection position between the third connecting plate 14 of each section 11 and the first connecting plate 12 of the adjacent section 11 is changeable, and the height of each section 11 is adjusted by changing the connection position between the third connecting plate 14 and the adjacent first connecting plate 12 so that each section 11 rotates along its own axis.

Specifically, the second connecting plate 13 is perpendicular to the first connecting plate 12 and the third connecting plate 14, and the first connecting plate 12, the second connecting plate 13 and the third connecting plate 14 in the same tread joint 11 are fixed by welding.

In this embodiment, the third connecting plate 14 of each tread joint 11 is connected with the first connecting plate 12 of the adjacent tread joint 11 through a plurality of fastening components, a plurality of first fixing holes 121 for the plurality of fastening components to penetrate are formed in the first connecting plate 12, a plurality of adjusting holes 15 for the plurality of fastening components to penetrate are formed in the third connecting plate 14, the fixing positions of the fastening components in the corresponding first fixing holes 121 are variable, and the fixing positions of the fastening components are adjusted according to the required tread height, so that the connection positions of the third connecting plate 14 and the adjacent first connecting plate 12 can be changed, and the adjusting process is simple and reliable. It will be appreciated that as an alternative embodiment, the fastening element may also be variable in the fixed position in the corresponding adjustment hole 15.

Specifically, considering that the processing precision of the connecting hole on the tread joint 11 is limited, the first fixing hole 121 includes a circular hole and a waist-shaped hole vertically extending from the hole opening, the upper end and the lower end of the waist-shaped hole correspond to two tread heights respectively, and the circular hole is opened between the two tread heights to be a middle tread height. It will be appreciated that, as an alternative embodiment, the first fixing hole 121 may include only a waist-shaped hole in which the aperture extends vertically, or may include only a circular hole, and a plurality of circular holes may be disposed at intervals along the width direction of the first connection plate 12.

In this embodiment, the tread mold further includes a bottom plate 16, the bottom end of each tread segment 11 is detachably disposed on the bottom plate 16, the bottom plate 16 plays a supporting role, the plurality of tread segments 11 are fixed on the base 50 through the bottom plate 16, and the tread segments 11 can be removed and adjusted by removing the bottom plate 16 during the removal. It will be appreciated that, as an alternative embodiment, the bottom plate 16 may be omitted and the bottom ends of the plurality of tread segments 11 directly secured to the base 50.

Specifically, the stair mould still includes the side direction support frame, and the side direction support frame is fixed to be set up in the mould of marking time one side of keeping away from backplate mould 20, and the upper end and the festival 11 fixed connection of marking time of side direction support frame, lower extreme and base 50 fixed connection, the side direction support frame plays the effect of side direction support to the mould of marking time for overall structure is more reliable.

In this embodiment, the stair mold further includes a plurality of telescopic structures 40 disposed between the side plate mold 30 and the bottom plate 16, each telescopic structure 40 has a fixed end and a movable end, the fixed end is fixedly connected with the top surface of the bottom plate 16 and the movable end is fixedly connected with the bottom surface of the side plate mold 30, or the movable end is fixedly connected with the top surface of the bottom plate 16 and the fixed end is fixedly connected with the bottom surface of the side plate mold 30, and when the height of the side plate mold 30 needs to be adjusted, the telescopic structure 40 can be extended or shortened. It will be appreciated that the telescoping structure between the side plate mold 30 and the bottom plate 16 may be omitted, and the height of the side plate mold 30 may be changed by providing spacers of different heights.

Specifically, when the telescopic structure 40 is shortest, the side plate mold 30 is located at the lowest position, which is the maximum width position of the stairs, and the telescopic structure 40 extends the side plate mold 30 to move vertically upward, which is the width of the stairs gradually decreases. It should be noted that, if the side plate mold 30 cannot meet the width requirement of the stair at this time, the side plate mold 30 may be removed, and the top surface of the bottom plate 16 may be used as the bottom surface of the pouring cavity.

In this embodiment, each telescopic structure 40 includes a fixed cylinder 41, a moving rod 42 and a positioning member 43, the fixed cylinder 41 is provided with a fitting hole for inserting the moving rod 42, the positioning member 43, the moving rod 42 and the fixed cylinder 41 are fitted to fix the vertical position of the moving rod 42, the position of the moving rod 42 in the fixed cylinder 41 can be adjusted by unscrewing the positioning member 43 during adjustment, and the position of the moving rod 42 can be fixed by screwing the positioning member 43 when fixing.

Specifically, the fixed cylinder 41 is a sleeve having a threaded hole, the moving rod 42 is a screw having a bearing plane, and the positioning member 43 is a lock nut engaged with the moving rod 42. It will be appreciated that, as an alternative embodiment, the positioning may be performed by a positioning pin passing through the side wall of the fixed cylinder 41 and cooperating with a positioning hole on the moving rod 42.

In this embodiment, the bottom end of each tread joint 11 is further fixedly provided with a fixing plate 17, the connection position between the fixing plate 17 and the bottom plate 16 is changeable, and when the connection position between the tread joints 11 is changed, the connection position between the fixing plate 17 and the bottom plate 16 is changed.

Specifically, the bottom plate 16 is provided with a long hole 161, the long hole 161 extends along the arrangement direction of the plurality of tread segments 11, each fixing plate 17 is provided with a through hole 171 for the fastening member to pass through, each through hole 171 is matched with the long hole 161, each tread segment 11 is fixed in the long hole 161 through the fastening member, and when the connection position between the tread segments 11 is changed, the fixing plates 17 rotate along the axes of the through holes 171. It will be appreciated that, as an alternative embodiment, the bottom plate 16 may be provided with a plurality of engaging holes for engaging the through holes 171 instead of the elongated holes 161.

In this embodiment, the side plate mold 30 includes a side mold plate 31 and a support frame 32 which are detachably connected, the bottom surface of the side mold plate 31 is matched with the top surface of the support frame 32, the side mold plate 31 is matched with the tread mold and the back plate mold 20, the side mold plate 31 is the bottom surface of the pouring cavity, the bottom surface of the support frame 32 is matched with the upper end of the telescopic structure 40, and the support frame 32 can play a reliable supporting role on the side mold plate 31.

Specifically, as shown in fig. 10 to 11, the supporting frame 32 is a frame body extending along the bottom surface of the pouring cavity, a plurality of connecting plates are fixed on one side of the side mold plate 31, which is close to the back plate mold 20, each connecting plate is fixedly matched with one side of the supporting frame 32 through a positioning pin, an upper positioning groove 321 matched with the top of the telescopic structure 40 is arranged on the bottom surface of the supporting frame 32, a lower positioning groove 162 matched with the lower end of each telescopic structure 40 is correspondingly arranged on the upper surface of the bottom plate 16, the upper positioning groove 321 and the lower positioning groove 162 are of a semicircular ring structure, and the upper positioning groove 321 and the lower positioning groove 162 are used for positioning the telescopic structure 40 together. It will be appreciated that, as an alternative embodiment, the support frame 32 may be omitted and the telescoping structure 40 directly mated with the sideform 31.

In this embodiment, a plurality of fixing tie rods 70 are further disposed at the top and bottom ends of the back plate mold 20 in the vertical direction, and after the back plate mold 20 approaches the step mold and forms a casting cavity, the back plate mold 20 is fixedly connected with the step mold through the plurality of fixing tie rods 70 to form a stable and reliable fixing cavity.

The following describes the manner of using the stair mold of this embodiment:

preassembling two tread segments 11 to the base plate 16, and mounting the tread segments by aligning the through holes 171 near the ends of the elongated holes 161 with the ends of the elongated holes 161; selecting corresponding connection positions between the stepping sections 11 according to the required stepping height and installing the subsequent stepping sections 11; installing a first custom joint 18 and a second custom joint 19; placing the telescopic structure 40 in the lower positioning groove 162 to adjust to a preset supporting height, simultaneously installing the side plate die 30, and matching the upper end of the telescopic structure 40 with the upper positioning groove 321; a third custom joint 21 and a fourth custom joint 22 are installed; pushing the backboard die 20 to be matched with the stepping die and the side plate die 30; the bottom of the back plate mould 20 is fixedly connected with the base 50 through bolts, and the back plate mould 20 is fixedly connected with the stepping mould through a plurality of fixed pull rods 70; the first end mold 61 and the second end mold 62 on both sides are installed.

The utility model also provides a precast concrete member production line, which comprises: the stair mould.

From the above description, it can be seen that the above-described embodiments of the present utility model achieve the following technical effects:

1. through general mould and customization mould combination, general mould is durable can multiple use, and the customization mould only needs to use less consumptive material to make, and adjustable part can change the mould size in the general mould, and the customization mould matches the customization according to corresponding size for same stair mould can be applied to the stair of different specifications, need not to make the stair mould of various specifications alone, has effectively reduced the manufacturing cost of stair mould in the single project.

2. The third connecting plate 14 of each pedal section 11 is connected with the first connecting plate 12 of the adjacent pedal section 11 through a plurality of fastening components, the fixing positions of the fastening components in the corresponding first fixing holes 121 are variable, and the connection positions of the third connecting plate 14 and the adjacent first connecting plate 12 can be changed by adjusting the fixing positions of the fastening components according to the required pedal height, so that the adjustment process is simple and reliable.

3. The side plate mold 30 comprises a side mold plate 31 and a support frame 32 which are detachably connected, the bottom surface of the side mold plate 31 is matched with the top surface of the support frame 32, the side mold plate 31 is matched with the stepping mold and the back plate mold 20, the side mold plate 31 is the bottom surface of a pouring cavity, the bottom surface of the support frame 32 is matched with the upper end of the telescopic structure 40, and the support frame 32 can play a reliable supporting role on the side mold plate 31.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims (10)

1. A stair mold, comprising:

the universal mold comprises a base (50), a stepping mold, a back plate mold (20), a first end mold and a second end mold, wherein the stepping mold and the back plate mold (20) are oppositely arranged on the base (50);

the customized die comprises a side plate die (30), a first platform die and a second platform die, wherein the side plate die (30) is arranged between the step die and the back plate die (20), one end of the step die is connected with the first platform die, the other end of the step die is connected with the second platform die, the first end die is connected with the first platform die, the second end die is connected with the second platform die, and the step die, the back plate die (20), the first end die, the second end die, the side plate die (30) and the second platform die enclose a pouring cavity.

2. Stair mould according to claim 1, characterized in that,

the stepping die comprises a plurality of stepping sections (11) which are sequentially arranged, wherein two adjacent stepping sections (11) are detachably connected and the connection position is changeable so as to change the stepping height of the stair;

the side plate mould (30) is arranged between the stepping mould and the back plate mould (20) in a vertically movable way, and the side plate is suitable for vertically moving to change the depth of the pouring cavity;

the back plate mold (20) is movably arranged on the base (50).

3. Stair mould according to claim 2, characterized in that each tread segment (11) comprises a first connection plate (12), a second connection plate (13) and a third connection plate (14) fixedly connected in sequence, the first connection plate (12) and the third connection plate (14) being arranged in parallel, the connection position of the third connection plate (14) of each tread segment (11) and the first connection plate (12) of the adjacent tread segment (11) being variable.

4. A stair mould according to claim 3, characterized in that the third connection plate (14) of each tread joint (11) is connected with the first connection plate (12) of the adjacent tread joint (11) through a plurality of fastening components, a plurality of first fixing holes (121) for the plurality of fastening components to penetrate are arranged on the first connection plate (12), a plurality of adjusting holes (15) for the plurality of fastening components to penetrate are arranged on the third connection plate (14), and the fixing positions of the fastening components in the corresponding first fixing holes (121) are variable.

5. Stair mould according to any one of claims 2 to 4, characterized in that it further comprises a base plate (16), the bottom end of each tread joint (11) being removably arranged on the base plate (16).

6. The stair mould according to claim 5, further comprising a plurality of telescopic structures (40) arranged between the side plate mould (30) and the bottom plate (16), each telescopic structure (40) having a fixed end and a movable end, the fixed end being fixedly connected with the top surface of the bottom plate (16) and the movable end being fixedly connected with the bottom surface of the side plate mould (30), or the movable end being fixedly connected with the top surface of the bottom plate (16) and the fixed end being fixedly connected with the bottom surface of the side plate mould (30).

7. The stair mold according to claim 6, wherein each telescopic structure (40) comprises a fixed cylinder (41), a moving rod (42) and a positioning piece (43), wherein the fixed cylinder (41) is provided with a matching hole for inserting the moving rod (42), and the positioning piece (43), the moving rod (42) and the fixed cylinder (41) are matched to fix the vertical position of the moving rod (42).

8. Stair mould according to claim 5, characterized in that the bottom end of each tread joint (11) is also fixedly provided with a fixing plate (17), the connection position of the fixing plate (17) with the bottom plate (16) being variable.

9. Stair mould according to any one of claims 1 to 4, characterized in that the side plate mould (30) comprises a detachably connected side plate (31) and a support frame (32), the bottom surface of the side plate (31) being mated with the top surface of the support frame (32), the side plate (31) being mated with the tread mould and the back plate mould (20).

10. A precast concrete member production line, comprising: the stair mould of any one of claims 1 to 9.

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