CN113250382A

CN113250382A - Box precast beam steel reinforcement skeleton inner formword installation positioner

Info

Publication number: CN113250382A
Application number: CN202110678290.5A
Authority: CN
Inventors: 和法展; 李洪升; 和树贵; 蒋慧略; 刘松尚
Original assignee: Shandong Qilide Heavy Industry Group Co ltd
Current assignee: Shandong Qilide Heavy Industry Group Co ltd
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2021-08-13

Abstract

The invention relates to the technical field of positioning devices, in particular to a box-type precast beam steel bar framework inner formwork mounting and positioning device which comprises a plurality of positioning devices sequentially arranged from front to back, wherein each positioning device comprises a bottom plate, a vertical supporting mechanism and a transverse supporting mechanism arranged between the vertical supporting mechanisms, clamping mechanisms are arranged on one side opposite to the two vertical supporting mechanisms and on the left side and the right side of the transverse supporting mechanism, the clamping mechanisms on the vertical supporting mechanisms can move along the vertical direction, and the clamping mechanisms on the transverse supporting mechanisms can move along the horizontal direction. Through setting up the clamping mechanism on horizontal supporting mechanism and vertical supporting mechanism, can carry out the adaptability adjustment to positioner according to the shape and the size of precast beam, angle of adjustment and size at will adapt to multiple case roof beam shape, adaptation engineering demand that can be fine, and clamping mechanism's size and regulation adapt to the reinforcing bar of multiple not unidimensional.

Description

Box precast beam steel reinforcement skeleton inner formword installation positioner

Technical Field

The invention relates to the technical field of positioning devices, in particular to a box-type precast beam reinforcement framework inner template mounting and positioning device.

Background

The box-type precast beam is widely applied to the construction of a large-span bridge, when the precast beam is manufactured, box beam reinforcing steel bars need to be bound on a reinforcing steel bar binding mould, various working conditions exist in the process of designing the box beam, particularly positioning the reinforcing steel bars, and the arrangement of the reinforcing steel bars is different for precast beams with different shapes and sizes, so that reinforcement cages with different shapes and sizes need to be bound frequently. Lack the reinforcing bar positioner who is suitable for complicated operating mode among the prior art, the size and the shape that the flexible adjustment reinforcing bar of being not convenient for arranged lack the box girder reinforcing bar positioner that can carry out the adaptability to different shape box girders, often lead to the phenomenon that engineering cost is higher, the time limit for a project is longer and construction quality is difficult to ensure.

Disclosure of Invention

In order to solve the technical problems mentioned in the background technology, the invention provides a device for installing and positioning an inner template of a steel reinforcement framework of a box-type precast beam.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a box precast beam steel reinforcement skeleton inner formword installation positioner which characterized in that: comprises a plurality of positioning devices which are arranged in sequence from front to back; each positioning device comprises a bottom plate; two vertical supporting mechanisms are oppositely arranged on the bottom plate; a transverse supporting mechanism is arranged between the two vertical supporting mechanisms; clamping mechanisms are arranged on one side opposite to the two vertical supporting mechanisms and on the left side and the right side of the transverse supporting mechanism; the clamping mechanism on the vertical supporting mechanism can move along the vertical direction, and the clamping mechanism on the transverse supporting mechanism can move along the horizontal direction.

Further, the vertical supporting mechanism comprises a counterweight section, a connecting section and a height adjusting section which are sequentially arranged from bottom to top; the height adjusting section comprises an adjusting screw rod which is rotatably connected to the top of the connecting section; the top of the adjusting screw is provided with an adjusting handle; the adjusting screw is in threaded connection with a nut sleeve; the clamping mechanism positioned on the vertical supporting mechanism is arranged on the nut sleeve.

Furthermore, the transverse supporting mechanism comprises two oppositely arranged lead screws, the two lead screws are opposite in direction and are respectively and rotatably connected with the connecting section, and the two lead screws can synchronously rotate; the two screw rods are rotatably connected with a screw base, and a clamping mechanism positioned on the transverse supporting mechanism is arranged on the screw base; the connecting section is connected with a driving shaft in a rotating mode, one end of the driving shaft is fixedly connected with one end of one of the screw rods, and the other end of the driving shaft penetrates through the connecting section and is connected with a motor.

Furthermore, a prismatic telescopic rod is connected between the two lead screws; the telescopic rod is formed by sequentially sliding and sleeving a plurality of telescopic joints from inside to outside, and the telescopic joint at the innermost side extends for a certain distance to form a nesting part; the two opposite sides of the two lead screws are respectively provided with accommodating grooves for accommodating two ends of the telescopic rod, and the nested part and the telescopic joint at the outermost side of the telescopic rod are respectively positioned in the two telescopic grooves.

Furthermore, limit blocks are arranged at the tail end of the nesting part and at one end of the telescopic rod far away from the nesting part; limiting grooves matched with the limiting blocks are formed in the two lead screws; the limiting block is arranged in the limiting groove and used for preventing the telescopic rod from being separated from the telescopic groove.

Furthermore, the clamping device comprises an annular fixed disc, connecting seats are arranged on the periphery of the fixed disc, and the fixed disc is respectively connected with the nut sleeve and the nut seat through the connecting seats; the fixed disc is provided with a driving groove; an inner gear ring is rotationally connected in the driving groove, and the upper end surface of the inner gear ring is lower than the upper end surface of the fixed disc; adjusting rods are arranged on the peripheral sides of the inner gear rings, adjusting grooves are formed in the fixed disc, and the adjusting rods can move in the adjusting grooves along the circumferential direction of the fixed disc; a plurality of pinions are meshed on the inner gear ring, the pinions are rotationally connected with the driving grooves, and the upper end surfaces of the pinions are higher than the upper end surface of the fixed disc; each pinion is meshed with a rack, and the racks are connected with the fixed disc in a sliding mode and arranged along the radial direction of the fixed disc; the end face of the rack is connected with a clamping block through a connecting column.

Furthermore, a prismatic limiting rod is arranged between the clamping mechanisms on the upper side and the lower side, and the limiting rod is hinged with the clamping mechanisms on the upper side and the lower side respectively.

Further, the bottom of the vertical supporting mechanism is connected with the bottom plate in a sliding mode.

Furthermore, a laser positioning instrument is arranged on the nut sleeve of one of the positioning devices, a positioning groove is arranged on the nut sleeve of the other positioning device, and the positioning groove is opposite to the laser positioning instrument; when the laser of the laser positioning instrument just falls into the positioning groove, the front positioning device and the rear positioning device are positioned on the same horizontal line.

Furthermore, a plurality of positioning bolts are further arranged on the bottom plate, and the bottoms of the positioning bolts are conical.

Compared with the prior art, the invention has the following beneficial effects: according to the device for installing and positioning the inner template of the steel reinforcement framework of the box-type precast beam, which is provided by the invention, the clamping mechanisms arranged on the transverse supporting mechanism and the vertical supporting mechanism can be used for carrying out adaptive adjustment on the positioning device according to the shape and the size of the precast beam, the angle and the size can be adjusted at will, the device is suitable for various box beam shapes, and the engineering requirements can be well met; the size and the adjustment of the clamping mechanism are suitable for reinforcing steel bars with different sizes; the lead screws of the transverse supporting mechanism are connected through the telescopic rods, so that the distance between the lead screws can be conveniently adjusted, the limiting and transmission effects can be exerted, the two lead screws can conveniently rotate synchronously, and the size of the steel reinforcement framework can be conveniently adjusted; the clamping mechanism located on the upper side and the clamping mechanism located on the lower side are connected through the prismatic limiting rod, and the limiting effect can be achieved on the clamping mechanism, so that the position of the clamping mechanism cannot be changed, and the steel bar framework can be shaped better.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic top view of the present invention;

FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is an enlarged view of the structure at B in FIG. 3;

FIG. 5 is a schematic view of the internal structure of the clamping mechanism;

fig. 6 is a schematic view of the entire structure of the clamping mechanism.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The device for installing and positioning the inner template of the box-type precast beam steel reinforcement framework mainly comprises at least 2 positioning devices which are sequentially arranged from front to back, and the positioning devices can erect steel reinforcements, so that the box-type precast beam steel reinforcement framework can be conveniently built, and the subsequent bundling and forming are convenient. The positioning device mainly comprises a bottom plate 1, a vertical supporting mechanism 2, a transverse supporting mechanism 3 and a clamping mechanism 4.

The two ends of the reinforcing steel bar are respectively clamped by the clamping mechanisms 4 on different positioning devices, so that the subsequent bundling is convenient. The two vertical supporting mechanisms 2 are oppositely arranged, and the bottom of each vertical supporting mechanism 2 is slidably arranged on the bottom plate 1 and can move along the length direction of the bottom plate 1.

In order to place the positioning device firmly, a plurality of positioning bolts 102 are further disposed on the bottom plate 1, so as to fix the positioning device to the ground or other platforms. The bottom of the positioning bolt 102 is conical, so that the insertion is convenient.

In this embodiment, the bottom of the vertical supporting mechanism 2 is connected to the bottom plate 1 in a sliding manner, i.e., a sliding block and a sliding rail are connected to each other, specifically, the bottom of the vertical supporting mechanism 2 is provided with a sliding block 201, the top of the bottom plate 1 is provided with a sliding rail 101 distributed along the length direction, and the sliding block 201 is connected to the sliding rail 101 in a sliding manner, so that the vertical supporting mechanism 2 can slide relative to the bottom plate 1. As an alternative embodiment, the sliding connection mode of the vertical supporting mechanism 2 and the bottom plate 1 is a pulley and slide way type connection, specifically, a pulley is arranged at the bottom of the vertical supporting mechanism 2, a slide way distributed along the length direction is arranged at the top of the bottom plate 1, and the pulley is arranged in the slide way in a sliding way (not shown in the figure).

The vertical supporting mechanism 2 mainly comprises a counterweight section 202, a connecting section 203 and a height adjusting section 204 which are sequentially arranged from bottom to top.

The arrangement of the weight section 202 can enable the gravity center of the whole device to move downwards, and stability is improved.

The connecting section 203 is mainly used for supporting and mounting the lateral support mechanism 3.

The height adjusting section 204 comprises an adjusting screw 2041 rotatably connected to the top of the connecting section 203, a nut sleeve 2042 is connected to the adjusting screw 2041 in a threaded manner, and a clamping mechanism 4 located on the vertical supporting mechanism 2 is arranged on the nut sleeve 2042. Adjusting screw 2041's top is equipped with adjustment handle 2043, can drive adjusting screw 2041 through adjustment handle 2043 and rotate, and then drives nut cover 2042 and clamping mechanism 4 and remove along vertical direction, realizes the altitude mixture control to clamping mechanism 4 on vertical strutting arrangement 2.

Two ends of the transverse supporting mechanism 3 are respectively and vertically arranged on the two vertical supporting mechanisms 2. The transverse supporting mechanism 3 is disposed on the connecting section 203, specifically, the transverse supporting mechanism 3 includes two oppositely disposed lead screws 301, the thread directions of the two lead screws 301 are opposite, and the lead screws 301 are reciprocating lead screws. A lead screw 301 is rotatably connected to each connecting segment 203. One of the connecting sections 203 is provided with a shaft hole coaxial with the screw 301, a driving shaft 302 is rotatably connected in the shaft hole through a bearing, and one end of the driving shaft 302 is fixedly connected with the screw 301. In this embodiment, the other end of the driving shaft 302 extends out of the connecting section 203 and is connected to a motor 303, and the transverse supporting device 3 is driven by the motor 303. Alternatively, as another alternative, the lateral support means is a hand-wheel drive (not shown). A nut seat 304 is rotatably connected to each lead screw 301, and the clamping mechanism 4 is mounted on the top of the nut seat 304.

In this embodiment, in order to adjust the length of the lateral support mechanism 3, the two lead screws 301 are connected by a telescopic rod 305. The cross-section of the telescoping rod 305 may be triangular, rectangular or other prismatic shape, although the invention is not limited in this regard. The prismatic telescopic rod 305 can form a limiting and transmission function, so that when the motor 303 drives one of the lead screws 301 to rotate, the telescopic rod 305 can drive the other lead screw 301 to rotate, and further the clamping mechanism 4 on the nut seat 304 is driven to move to be close to or far away from each other, so that the shape of the steel bar framework can be adjusted as required.

The telescopic rod 305 is formed by sequentially slidably sleeving a plurality of telescopic joints 3051 from inside to outside, and the telescopic joint 3051 at the innermost side extends out for a certain distance to form a nesting part 3052. The opposite sides of the two lead screws 3052 are respectively provided with accommodating grooves 3053 for accommodating two ends of the telescopic rod 305, and the nested part 3052 and the telescopic joint 3051 on the outermost side of the telescopic rod 305 are respectively positioned in the two telescopic grooves 3053.

Keep away from nested portion 3052 at the end of nested portion 3052 and the telescopic link one end all is equipped with stopper 3054, and the inside of two lead screws 301 all is equipped with this stopper 3054 assorted spacing groove, and the spacing inslot is located to stopper 3054 to fix the both ends of telescopic link, prevent that the telescopic link from breaking away from flexible recess 3053.

The clamping mechanisms 4 on the vertical supporting mechanism 2 and the transverse supporting mechanism 3 are mutually matched to realize the adjustment of the shape and the size of the steel reinforcement framework.

As another alternative, there is a fixed connection between the two lead screws 301.

The transverse supporting mechanism 3 can drive the two clamping mechanisms 4 on the transverse supporting mechanism to mutually approach or depart from each other along the horizontal direction; vertical supporting mechanism 2 can drive clamping mechanism 4 above that and remove along vertical direction, and horizontal supporting mechanism 3 and vertical supporting mechanism 2 mutually support, adjust clamping mechanism 4's position and relative angle respectively to be applicable to the framework of steel reinforcement of not equidimension overall dimension and different angles.

The clamping mechanisms 4 on each positioning device are four and are respectively distributed on one side opposite to the vertical supporting mechanism 2 and the left side and the right side of the transverse supporting mechanism 4, and the four clamping mechanisms 4 respectively correspond to the four-corner positions of the reinforcement framework of the box-shaped precast beam so as to clamp and fix the reinforcement.

The clamping mechanism 4 comprises an annular fixed disk 401, an annular driving groove 402 is formed in the fixed disk 401, an inner gear ring 403 is concentrically arranged in the driving groove 402, the inner gear ring 403 is rotatably connected with the fixed disk 401, and the upper end surface of the inner gear ring 403 is lower than the upper end surface of the fixed disk 401. A plurality of evenly distributed pinions 404 are engaged on the inner gear ring 403, and the pinions 404 are rotatably connected with the bottom surface of the driving groove 402, so that the pinions 404 are driven to rotate by the inner gear ring 403. The height of the pinion 404 is greater than that of the ring gear 403, and the upper end surface of the pinion 404 is higher than that of the fixed disk 401. A rack 405 is correspondingly meshed on each pinion 404, and a plurality of racks 405 are connected with the upper end face of the fixed disc 401 in a sliding mode. Since the height of the upper end surface of ring gear 403 is lower than that of the upper end surface of fixed disk 401, rack 405 is at a distance from ring gear 403, and does not hinder the rotation of ring gear 403. And each rack 405 is disposed in a radial direction of the fixed disk 401 such that each rack 405 is directed toward the center of the fixed disk 401. The end face of the rack 405 is connected with clamping blocks 407 through connecting columns 406, one side of each clamping block 407, which faces the center of the fixed disk 401, is of an arc-shaped structure, and the steel bars are clamped among a plurality of clamping blocks 407.

In order to facilitate driving the inner gear ring 403 to rotate, an adjusting rod 408 is fixedly connected to the peripheral side of the inner gear ring 403, an adjusting groove 409 is formed in the fixed disk 401, and the adjusting rod 408 can move back and forth in the adjusting groove 409 along the circumferential direction of the fixed disk 401, so that the inner gear ring 403 can be adjusted in rotation through the adjusting rod 408. When the inner gear ring 403 rotates, the pinion 404 is driven to rotate, and further the rack 405 and the clamping blocks 407 on the rack 405 are driven to move along the radial direction of the fixed disk 401, so that the distance between the clamping blocks 407 is controlled, and adaptive adjustment is performed according to the diameter of the steel bar.

The fixed plate 401 is provided with a connecting seat 410 on the periphery, and the clamping device 4 is connected to the nut sleeve 2042 and the nut seat 304 through the connecting seat 410.

And a limiting rod 411 is connected between the clamping mechanisms 4 at the upper side and the lower side respectively. Since the upper clamping mechanism 4 needs to adjust the height up and down along the vertical supporting mechanism 2, and the lower clamping mechanism 4 needs to adjust the distance left and right along the horizontal supporting mechanism 3, in this embodiment, two ends of the limiting rod 411 are respectively hinged to the two upper and lower clamping mechanisms 4, so as to adapt to the angle change between the upper and lower clamping mechanisms 4. The cross-section of the stopper rod 411 may be triangular, rectangular or other prism shape, which is not limited in the present invention. As another alternative, two ends of the limiting rod 411 are connected with two clamping mechanisms 4 located at the upper and lower sides respectively through a spherical hinge. Through setting up gag lever post 411, both can adapt to and carry out corresponding regulation between the upper and lower both sides clamping device 4, can play limiting displacement to clamping device 4 again, prevent that clamping mechanism 4 from beating along with nut cover 2042 or screw seat 304 and changeing, play the effect of guide rail.

In order to adjust the clamping mechanism 4 on the positioning device on the same horizontal line, so that the steel bar is always parallel to the horizontal plane, the nut sleeve 2042 of one positioning device is provided with the laser positioning instrument, the nut sleeve 2042 of the other positioning device is provided with the positioning groove 205, the positioning groove 205 and the laser positioning instrument are arranged oppositely, when the laser of the laser positioning instrument just falls into the positioning groove 205, the front positioning device and the rear positioning device are positioned on the same horizontal line, and horizontal calibration is facilitated.

The working principle is as follows: when the device for installing and positioning the inner template of the steel reinforcement framework of the box-type precast beam is used, a plurality of positioning devices are adjusted to be positioned on the same horizontal line through the laser positioning instruments and the positioning grooves 205 on the positioning devices, then the adjusting handle 2043 and the starting motor 303 are respectively rotated according to the size of the precast beam to be manufactured, and the angles and the distances among a plurality of clamping mechanisms 4 are adjusted; or when the distance between the clamping mechanisms 4 at the left side and the right side needs to be increased continuously, the distance between the two vertical supporting mechanisms 2 can be moved, so that the telescopic rods 305 between the two lead screws 301 are extended, then four steel bars at the four corners of the inner formwork of the steel reinforcement framework can be respectively arranged in the clamping mechanisms 4 to be clamped, the steel bars are parallelly erected by the positioning devices, and then the positioning devices are matched with other steel bars to be bundled and built for forming.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a box precast beam steel reinforcement skeleton inner formword installation positioner which characterized in that: comprises a plurality of positioning devices which are arranged in sequence from front to back; each positioning device comprises a bottom plate; two vertical supporting mechanisms are oppositely arranged on the bottom plate; a transverse supporting mechanism is arranged between the two vertical supporting mechanisms; clamping mechanisms are arranged on one side opposite to the two vertical supporting mechanisms and on the left side and the right side of the transverse supporting mechanism; the clamping mechanism on the vertical supporting mechanism can move along the vertical direction, and the clamping mechanism on the transverse supporting mechanism can move along the horizontal direction.

2. The box-type precast beam steel reinforcement framework inner formwork installing and positioning device according to claim 1, characterized in that: the vertical supporting mechanism comprises a counterweight section, a connecting section and a height adjusting section which are sequentially arranged from bottom to top; the height adjusting section comprises an adjusting screw rod which is rotatably connected to the top of the connecting section; the top of the adjusting screw is provided with an adjusting handle; the adjusting screw is in threaded connection with a nut sleeve; the clamping mechanism positioned on the vertical supporting mechanism is arranged on the nut sleeve.

3. The box-type precast beam steel reinforcement framework inner formwork installing and positioning device according to claim 2, characterized in that: the transverse supporting mechanism comprises two oppositely arranged lead screws, the two lead screws are opposite in direction and are respectively and rotatably connected with the connecting section, and the two lead screws can synchronously rotate; the two screw rods are rotatably connected with a screw base, and a clamping mechanism positioned on the transverse supporting mechanism is arranged on the screw base; the connecting section is connected with a driving shaft in a rotating mode, one end of the driving shaft is fixedly connected with one end of one of the screw rods, and the other end of the driving shaft penetrates through the connecting section and is connected with a motor.

4. The box-type precast beam steel reinforcement framework inner formwork installing and positioning device according to claim 3, characterized in that: a prismatic telescopic rod is connected between the two lead screws; the telescopic rod is formed by sequentially sliding and sleeving a plurality of telescopic joints from inside to outside, and the telescopic joint at the innermost side extends for a certain distance to form a nesting part; the two opposite sides of the two lead screws are respectively provided with accommodating grooves for accommodating two ends of the telescopic rod, and the nested part and the telescopic joint at the outermost side of the telescopic rod are respectively positioned in the two telescopic grooves.

5. The box-type precast beam steel reinforcement framework inner formwork installing and positioning device according to claim 4, characterized in that: limiting blocks are arranged at the tail end of the nesting part and at one end of the telescopic rod far away from the nesting part; limiting grooves matched with the limiting blocks are formed in the two lead screws; the limiting block is arranged in the limiting groove and used for preventing the telescopic rod from being separated from the telescopic groove.

6. The box-type precast beam steel reinforcement framework inner formwork installing and positioning device according to claim 1 or 4, characterized in that: the clamping device comprises an annular fixed disc, connecting seats are arranged on the periphery of the fixed disc, and the fixed disc is respectively connected with the nut sleeve and the nut seat through the connecting seats; the fixed disc is provided with a driving groove; an inner gear ring is rotationally connected in the driving groove, and the upper end surface of the inner gear ring is lower than the upper end surface of the fixed disc; adjusting rods are arranged on the peripheral sides of the inner gear rings, adjusting grooves are formed in the fixed disc, and the adjusting rods can move in the adjusting grooves along the circumferential direction of the fixed disc; a plurality of pinions are meshed on the inner gear ring, the pinions are rotationally connected with the driving grooves, and the upper end surfaces of the pinions are higher than the upper end surface of the fixed disc; each pinion is meshed with a rack, and the racks are connected with the fixed disc in a sliding mode and arranged along the radial direction of the fixed disc; the end face of the rack is connected with a clamping block through a connecting column.

7. The box-type precast beam steel reinforcement framework inner formwork installing and positioning device according to claim 6, characterized in that: and a prismatic limiting rod is arranged between the clamping mechanisms on the upper side and the lower side, and the limiting rod is hinged with the clamping mechanisms on the upper side and the lower side respectively.

8. The box-type precast beam steel reinforcement framework inner formwork installing and positioning device according to claim 4, characterized in that: the bottom of the vertical supporting mechanism is connected with the bottom plate in a sliding mode.

9. The box-type precast beam steel reinforcement framework inner formwork installing and positioning device according to claim 1, characterized in that: a laser positioning instrument is arranged on the nut sleeve of one positioning device, a positioning groove is arranged on the nut sleeve of the other positioning device, and the positioning groove is opposite to the laser positioning instrument; when the laser of the laser positioning instrument just falls into the positioning groove, the front positioning device and the rear positioning device are positioned on the same horizontal line.

10. The box-type precast beam steel reinforcement framework inner formwork installing and positioning device according to claim 1, characterized in that: the bottom plate is also provided with a plurality of positioning bolts, and the bottoms of the positioning bolts are conical.