CN114809602A - Joist structure for supporting formwork - Google Patents
Joist structure for supporting formwork Download PDFInfo
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- CN114809602A CN114809602A CN202210602403.8A CN202210602403A CN114809602A CN 114809602 A CN114809602 A CN 114809602A CN 202210602403 A CN202210602403 A CN 202210602403A CN 114809602 A CN114809602 A CN 114809602A
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- butt joint
- support
- wall
- fixedly connected
- joist structure
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
- E04G11/48—Supporting structures for shutterings or frames for floors or roofs
- E04G11/50—Girders, beams, or the like as supporting members for forms
- E04G11/52—Girders, beams, or the like as supporting members for forms of several units arranged one after another
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
- E04G11/48—Supporting structures for shutterings or frames for floors or roofs
- E04G11/483—Supporting heads
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/001—Corner fastening or connecting means for forming or stiffening elements
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Abstract
The invention belongs to the technical field of building construction, and particularly relates to a joist structure for supporting a template, which comprises two support brackets and a plurality of groups of regulating blocks, wherein the two support brackets are arranged in parallel, the plurality of groups of regulating blocks are positioned between the two support brackets, the lower end of each regulating block is fixedly connected with a corresponding butt joint block, the butt joint block is provided with a corresponding support rod in a matching way, the center of the side wall of each regulating block is fixedly provided with a butt joint rod, the top end of the butt joint rod is connected with a corresponding support plate through a support column, an opening is formed in the support plate, a matched tray is vertically and slidably connected in the opening, the lower end of the outer side wall of the tray is fixedly connected with a corresponding pressing ring, and the outer diameter of the pressing ring is larger than the inner diameter of the opening; through set up the tray in the layer board, can support the distance that the layer board was stretched out to the corresponding adjustment tray of characteristic of expend with heat and contract with cold according to joist structure and template, ensure the two and offset all the time, avoid the mutual extrusion of the two junction to lead to warping.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a joist structure for supporting a template.
Background
In cast in situ concrete building construction, the support of template generally adopts support class to support and bracing bolt class to support, and the roof supports the novel roof bearing structure who refers the construction usefulness for the roof in house supports, also calls roof support template steel construction, is novel roof quick detach support system, and it can improve constructor work efficiency greatly in the building work progress to shorten construction cycle.
The joist structure for supporting the formwork generally comprises a plurality of groups of supporting plates which are arranged in a crossed mode to form channel steel, a supporting bracket of the channel steel is matched with the top of the supporting plate and is erected below the supporting plate to provide upward supporting force for supporting the formwork, so that the formwork is stable and fixed, and the construction requirements of molding and pouring concrete are met.
Joist structure on the market generally uses for a small amount of timber construction of steelframe scale deposit cooperation, in fact, no matter the fossil fragments of timber construction's support piece or steel construction all have the phenomenon of expend with heat and contract with cold, when weather is hot, the template can take place the inflation with layer board and steel structural support piece, extrude each other, thereby produce stress concentration, when weather is cold, timber structure and steel construction can take place the shrink, thereby there is the clearance between leading to layer board and the template to support, the phenomenon of leaking thick liquid appears easily in follow-up concrete pouring, and there is certain potential safety hazard.
Disclosure of Invention
The invention provides a joist structure for supporting a formwork, and aims to solve the problems that in the prior art, when the formwork, a supporting plate and a steel structure supporting piece are hot, the formwork, the supporting plate and the steel structure supporting piece are expanded and mutually extruded to generate stress concentration, and in cold weather, a wood structure and a steel structure are contracted to cause a gap between the supporting plate and the formwork support, and subsequent concrete pouring is easy to cause slurry leakage.
The technical scheme adopted by the invention for solving the technical problems is as follows: a joist structure for supporting a template comprises two supporting brackets and a plurality of groups of adjusting blocks, wherein the two supporting brackets are arranged in parallel, the plurality of groups of adjusting blocks are positioned between the two supporting brackets, the lower end of each adjusting block is fixedly connected with a corresponding butt joint block, a corresponding supporting rod is arranged on the butt joint block in a matching way, a butt joint rod is fixedly arranged at the center of the side wall of the adjusting block, the top end of the butt joint rod is connected with a corresponding supporting plate through a supporting column, an opening is formed in the supporting plate, a matched tray is vertically and slidably connected in the opening, a corresponding pressing ring is fixedly connected at the lower end of the outer side wall of the tray, the outer diameter of the pressing ring is larger than the inner diameter of the opening, a plurality of groups of uniformly distributed liquid storage cylinders are fixedly connected on the inner wall of the upper side of the supporting plate, an extrusion plate is vertically and slidably connected on the inner wall of each liquid storage cylinder in a sealing way, and low-boiling-point evaporation liquid is arranged between the upper side wall of the extrusion plate and the inner wall of the liquid storage cylinders, lateral wall fixedly connected with spliced pole under the stripper plate, the spliced pole runs through liquid storage cylinder lower end wall and clamping ring and goes up lateral wall fixed connection downwards, the common cover is equipped with reset spring outside liquid storage cylinder and the spliced pole, the reset spring both ends respectively with clamping ring go up lateral wall and layer board upside inner wall fixed connection.
Preferably, a cylindrical cavity is formed in the adjusting block, a rotating rod is connected to the lower side wall of the butt joint block in a rotating mode, a first bevel gear fixedly connected with the cylindrical cavity is inserted into the top end of the rotating rod upwards, second bevel gears meshed with the first bevel gears are symmetrically arranged in the cylindrical cavity, each second bevel gear is connected with the inner end wall of the cylindrical cavity in a rotating mode through a lead screw, a corresponding moving sleeve is connected to the lead screw in a threaded mode, each connecting rod corresponding to the upper side wall and the lower side wall of the moving sleeve is fixedly connected, a strip-shaped opening matched with the connecting rod is formed in the strip-shaped block, the strip-shaped opening is communicated with the cylindrical cavity, each bending piece corresponding to the end, far away from the moving sleeve, of the connecting rod is fixedly connected with the inner wall of the bending piece and abuts against the side wall of the bearing bracket.
Preferably, the support bracket is arranged in a flat U shape, matching blocks corresponding to the positions of the adjusting blocks are arranged in the support bracket, and one end, far away from the connecting rod, of each group of bending piece is fixedly connected with the corresponding matching blocks together.
Preferably, the top end of the butt joint rod is provided with a butt joint bulge, and the lower end of the support column is provided with a butt joint groove matched with the butt joint bulge.
Preferably, the top end of the butt joint rod is set to be a circular truncated cone, and the lower end of the support column is provided with a butt joint cover matched with the circular truncated cone.
Preferably, the inner wall of the support plate upper book is fixedly provided with a plurality of groups of limit components which are uniformly distributed, and the plurality of groups of limit components are annularly arranged around the opening.
Preferably, every group spacing subassembly all includes gag lever post and spacing piece, gag lever post and spacing piece fixed connection, and the gag lever post other end and layer board upside inner wall fixed connection.
Preferably, fixedly connected with multiunit evenly distributed's stiffener between support column lateral wall upper end and the layer board lower wall, the multiunit the stiffener all sets to the type of bending.
The invention has the advantages that:
1. when the weather is hot, the low-boiling-point evaporation liquid in the liquid storage cylinder can be gasified to push the extrusion plate to extrude the connecting column, the connecting column drives the pressing ring and the tray to shrink downwards, so that a certain expansion gap is reserved between the template support and the joist structure, the defect that the template support and the joist structure are extruded to cause stress concentration and crack of the template support and the joist structure is avoided, when the weather is cold, the low-boiling-point evaporation liquid is liquefied, the pressing ring and the tray are reset by the aid of the reset spring, the joist structure is abutted against the lower side of the template support to make up a gap generated by shrinkage of the template support and the joist structure, slurry leakage and other phenomena are effectively avoided, and the support stability of the joist structure on the template support is also improved;
2. joist structure is through setting up the cylindricality chamber in the regulating block, when needing to make regulating block and support bracket cooperation, the bull stick is rotated to the forward, first bevel gear drives the lead screw through the second bevel gear and rotates, the removal cover rather than threaded connection drives the connecting rod along the removal of bar opening thereupon, the connecting rod drives the piece of bending thereupon and presss from both sides tightly support bracket, thereby realize the quick installation of regulating block and support bracket, when needing to dismantle, only need the reverse rotation bull stick alright, need not special instrument alright realize the quick installation of joist structure, need not drill on support bracket, the whole support intensity of joist structure has been improved greatly, reduce staff work burden, also be convenient for the cyclic utilization of material.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic overall structure diagram according to a first embodiment;
FIG. 2 is a schematic view of a matching structure of the butt-joint block, the support rod and the adjusting block according to the first embodiment;
FIG. 3 is a schematic cross-sectional view of the interior of an adjusting block according to the first embodiment;
FIG. 4 is a schematic view of a liquid storage cylinder, a connecting post, and a return spring according to the first embodiment;
FIG. 5 is a schematic view of an internal structure of a liquid storage barrel according to the first embodiment;
FIG. 6 is a schematic view of an internal structure of a position-limiting assembly and a supporting plate according to a first embodiment;
fig. 7 is a schematic view of the internal structure of the reinforcing block and the supporting plate according to the second embodiment.
In the figure: the device comprises a support bracket 1, an adjusting block 2, a bending piece 3, a matching block 4, a butt joint rod 5, a butt joint cover 6, a support column 7, a support plate 8, a spacing component 801, a reinforcing block 802, a tray 9, a pressing ring 901, a liquid storage barrel 902, a connecting column 903, a reset spring 904, an extrusion plate 905, an opening 10, a support rod 11, a butt joint block 12, a strip-shaped opening 13, a connecting rod 14, a reinforcing rod 15, a butt joint bulge 16, a rotating rod 17, a first bevel gear 18, a second bevel gear 19, a screw rod 20 and a moving sleeve 21.
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.
Example one
Referring to fig. 1-6, a joist structure for supporting a formwork comprises two supporting brackets 1 and a plurality of sets of adjusting blocks 2, wherein the two supporting brackets 1 are arranged in parallel, the plurality of sets of adjusting blocks 2 are arranged between the two supporting brackets 1, the lower end of each adjusting block 2 is fixedly connected with a corresponding butt-joint block 12, the butt-joint block 12 is provided with a corresponding supporting rod 11 in a matching way, the center of the upper side wall of the adjusting block 2 is fixedly provided with a butt-joint rod 5, the top end of the butt-joint rod 5 is connected with a corresponding supporting plate 8 through a supporting column 7, an opening 10 is arranged in the supporting plate 8, a matching tray 9 is vertically and slidably connected in the opening 10, the lower end of the outer side wall of the tray 9 is fixedly connected with a corresponding pressing ring 901, the outer diameter of the pressing ring 901 is larger than the inner diameter of the opening 10, the inner side wall of the supporting plate 8 is fixedly connected with a plurality of uniformly distributed liquid storage cylinders 902, the inner wall of each liquid storage cylinder 902 is vertically and hermetically connected with a squeezing plate 905, a low-boiling-point evaporating liquid is arranged between the upper side wall of the extrusion plate 905 and the inner wall of the upper end of the liquid storage cylinder 902, the low-boiling-point evaporating liquid is liquid dichloromethane with the boiling point of 39.75 ℃, the liquid storage cylinder 902 and the supporting plate 8 are both made of heat conduction materials, the lower side wall of the extrusion plate 905 is fixedly connected with a connecting column 903, the connecting column 903 downwards penetrates through the lower end wall of the liquid storage cylinder 902 and is fixedly connected with the upper side wall of the pressing ring 901, a return spring 904 is sleeved outside the liquid storage cylinder 902 and the connecting column 903 together, and two ends of the return spring 904 are fixedly connected with the upper side wall of the pressing ring 901 and the upper side wall of the supporting plate 8 respectively; to the joist structure on the market at present generally for a small amount of timber construction use of steelframe scale deposit cooperation, in fact, no matter the support piece of timber construction or the fossil fragments of steel construction all have the phenomenon of expending with heat and contracting with cold, when weather is hot, template and layer board 8 and steel structure support piece can take place the inflation, extrude each other, thereby produce stress concentration, when weather is cold, timber construction and steel construction can take place the shrink, thereby lead to having the clearance between layer board 8 and the template support, the easy phenomenon that leaks appears of follow-up concrete placement, and there is certain potential safety hazard, this joist structure is when weather is hot, thereby low boiling point evaporating liquid in the liquid storage cylinder 902 can gasify and promote the extrusion board 905 extrusion spliced pole 903, spliced pole 903 drives clamping ring 901 and tray 9 and contracts downwards thereupon, thereby make and reserve certain inflation clearance between template support and the joist structure, thereby avoid taking place the extrusion between template support and the joist structure and lead to the two to concentrate stress and appear the shortcoming of crack When the weather is cold, at the moment, the low-boiling-point evaporation liquid is liquefied, and the return spring 904 pulls the pressing ring 901 and the tray 9 to reset, so that the joist structure is abutted to the lower side of the template support, a gap generated by contraction of the joist structure and the template support is made up, slurry leakage and other phenomena are effectively avoided, and the support stability of the joist structure on the template support is also improved.
A cylindrical cavity is formed in the adjusting block 2, a rotating rod 17 is rotatably connected to the side wall of the butt joint block 12, a first bevel gear 18 is fixedly connected to the top end of the rotating rod 17 in an upward insertion mode, second bevel gears 19 meshed with the first bevel gears 18 are symmetrically arranged in the cylindrical cavity, each second bevel gear 19 is rotatably connected with the inner end wall of the cylindrical cavity through a screw rod 20, a corresponding moving sleeve 21 is connected to the screw rod 20 in a threaded mode, corresponding connecting rods 14 are fixedly connected to the upper side wall and the lower side wall of each moving sleeve 21, a strip-shaped opening 13 matched with the connecting rods 14 is formed in each strip-shaped block, the strip-shaped opening 13 is communicated with the cylindrical cavity, a corresponding bending piece 3 is fixedly connected to one end, far away from the moving sleeve 21, of each connecting rod 14, and the inner wall of each bending piece 3 abuts against the side wall of the support bracket 1; aiming at the defects that a plurality of groups of bolts need to be screwed in sequence, the disassembly and the assembly are complicated and the working strength of workers is high when the existing joist structure supporting piece is assembled, the joist structure is characterized in that a cylindrical cavity is arranged in an adjusting block 2, when the adjusting block 2 needs to be matched with a supporting bracket 1, a rotating rod 17 is rotated in a forward direction, a first bevel gear 18 drives a screw rod 20 to rotate through a second bevel gear 19, a moving sleeve 21 in threaded connection with the first bevel gear drives a connecting rod 14 to move along a strip-shaped opening 13, the connecting rod 14 drives a bending piece 3 to clamp the supporting bracket 1, so that the rapid assembly of the adjusting block 2 and the supporting bracket 1 is realized, when the joist structure is disassembled, the rotating rod 17 is rotated in a reverse direction, the rapid assembly of the joist structure can be realized without a special tool, no hole is drilled on the supporting bracket 1, the integral supporting strength of the joist structure is greatly improved, and the working load of the workers is reduced, and the recycling of materials is facilitated.
The supporting bracket 1 is arranged in a flat U shape, the supporting bracket 1 is internally provided with a matching block 4 corresponding to the position of the adjusting block 2, and one end of each group of bending pieces 3 far away from the connecting rod 14 is fixedly connected with the corresponding matching block 4 together; through the setting of cooperation piece 4, further strengthened the stability of cooperation between regulating block 2 and the support bracket 1, avoided the two junction to take place stress deformation.
The top end of the butt joint rod 5 is provided with a butt joint bulge 16, and the lower end of the support column 7 is provided with a butt joint groove matched with the butt joint bulge 16; through the cooperation of butt joint arch 16 and butt joint recess, butt joint pole 5 and support column 7 can be dismantled, if a certain department takes place to warp or damage, only need to change corresponding part alright, the maintenance cost of material has been reduced to the change mutually.
The top end of the butt joint rod 5 is set to be a truncated cone, and the lower end of the support column 7 is provided with a butt joint cover 6 matched with the truncated cone; the circular truncated cone is matched with the butt joint cover 6, horizontal bearing pressure of the butt joint bulge 16 and the butt joint groove is shared, and the connection strength between the support column 7 and the butt joint rod 5 is further improved.
A plurality of groups of limit components 801 which are uniformly distributed are fixedly arranged on the inner wall of the upper book of the supporting plate 8, and the plurality of groups of limit components 801 are annularly arranged around the opening 10; through the setting of the spacing subassembly 801 of multiunit, can inject the biggest rise of clamping ring 901 to inject the biggest rise of tray 9, when avoiding low boiling evaporation liquid shrink, thereby the extrusion template support of tray 9 rise seriously.
Each group of limiting assemblies 801 comprises a limiting rod and a limiting sheet, the limiting rod is fixedly connected with the limiting sheet, and the other end of the limiting rod is fixedly connected with the inner wall of the upper side of the supporting plate 8; the pressing ring 901 can be stably limited by matching the limiting rod with the limiting sheet.
A plurality of groups of reinforcing rods 15 which are uniformly distributed are fixedly connected between the upper end of the side wall of the supporting column 7 and the lower side wall of the supporting plate 8, and the groups of reinforcing rods 15 are all arranged into bending types; through laying multiunit stiffener 15 under layer board 8 between lateral wall and the support column 7, can share the radial pressure that support column 7 received, avoid layer board 8 and support column 7 junction fracture, support 8 multi-section positions of layer board simultaneously, avoid layer board 8 to take place to warp.
Example two
Referring to fig. 7, in a first comparative example, as another embodiment of the present invention, a plurality of groups of reinforcing blocks 802 are uniformly distributed on a fixing pad in a supporting plate 8, and the plurality of groups of reinforcing blocks 802 are connected to inner walls of upper and lower sides of the supporting plate 8; through the setting of boss 802, improved the whole support intensity of layer board 8, avoided layer board 8 to take place to warp, influence its support stability to the template support.
The working principle aims at that the joist structure on the market is generally used by matching steel frame scale with a small amount of timber structure, in fact, both the support piece of timber structure and the keel of steel structure have the phenomena of thermal expansion and cold contraction, when the weather is hot, the template, the supporting plate 8 and the steel structure support piece can expand and extrude each other, so that stress concentration is generated, when the weather is cold, the timber structure and the steel structure can contract, so that a gap exists between the supporting plate 8 and the template support, the subsequent concrete pouring is easy to have the phenomenon of slurry leakage, and certain potential safety hazard exists, when the joist structure is hot, low-boiling-point evaporation liquid in the liquid storage cylinder 902 can be gasified so as to push the extrusion plate 905 to extrude the connecting column 903, the connecting column 903 drives the pressing ring 901 and the tray 9 to contract downwards, so that a certain expansion gap is reserved between the template support and the joist structure, the defect that the template support and the joist structure are extruded to cause stress concentration and crack of the template support and the joist structure is avoided, when the weather is cold, the low-boiling-point evaporation liquid is liquefied, and the return spring 904 pulls the pressing ring 901 and the tray 9 to return, so that the joist structure is abutted against the lower side of the template support, gaps generated by contraction of the template support and the joist structure are made up, slurry leakage and the like are effectively avoided, and the support stability of the joist structure to the template support is also improved;
the existing joist structure supporting piece needs to screw multiple groups of bolts in sequence during installation, the disassembly and installation are complicated, and the working strength of workers is high, the joist structure is characterized in that a cylindrical cavity is formed in an adjusting block 2, when the adjusting block 2 needs to be matched with a support bracket 1, a rotating rod 17 is rotated in a forward direction, a first bevel gear 18 drives a screw rod 20 to rotate through a second bevel gear 19, a moving sleeve 21 in threaded connection with the first bevel gear drives a connecting rod 14 to move along a strip-shaped opening 13, the connecting rod 14 drives a bending piece 3 to clamp the support bracket 1 along with the connecting rod, so that the adjusting block 2 and the support bracket 1 are quickly installed, when the joist structure is required to be disassembled, the rotating rod 17 only needs to be rotated in a reverse direction, the joist structure can be quickly installed without a special tool, holes are not required to be drilled on the support bracket 1, and the integral supporting strength of the joist structure is greatly improved.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (8)
1. The utility model provides a joist structure that formwork support was used which characterized in that: the device comprises two support brackets (1) and a plurality of groups of adjusting blocks (2), wherein the two support brackets (1) are arranged in parallel, the plurality of groups of adjusting blocks (2) are positioned between the two support brackets (1), the lower end of each adjusting block (2) is fixedly connected with a corresponding butt joint block (12), the butt joint blocks (12) are provided with corresponding support rods (11) in a matching way, the center of the side wall of each adjusting block (2) is fixedly provided with a butt joint rod (5), the top end of each butt joint rod (5) is connected with a corresponding support plate (8) through a support column (7), an opening (10) is formed in each support plate (8), a matched tray (9) is vertically and slidably connected in each opening (10), the lower end of the outer side wall of each tray (9) is fixedly connected with a corresponding pressing ring (901), the outer diameter of each pressing ring (901) is larger than the inner diameter of each opening (10), a plurality of groups of uniformly distributed liquid storage cylinders (902) are fixedly connected on the inner wall of the upper side of each support plate (8), every liquid storage barrel (902) inner wall all seals vertical sliding connection has stripper plate (905), and is provided with low boiling evaporation liquid between lateral wall and liquid storage barrel (902) upper end inner wall on stripper plate (905), side wall fixedly connected with spliced pole (903) under stripper plate (905), side wall fixed connection is gone up with clamping ring (901) to spliced pole (903) down run through liquid storage barrel (902) lower end wall, liquid storage barrel (902) and spliced pole (903) common cover are equipped with reset spring (904), reset spring (904) both ends respectively with clamping ring (901) upper end wall and layer board (8) upside inner wall fixed connection.
2. A joist structure as claimed in claim 1, wherein: a cylindrical cavity is formed in the adjusting block (2), the side wall of the butt joint block (12) is rotatably connected with a rotating rod (17), the top end of the rotating rod (17) is upwards inserted into the cylindrical cavity and fixedly connected with a first bevel gear (18), second bevel gears (19) meshed with the first bevel gear (18) are symmetrically arranged in the cylindrical cavity, each second bevel gear (19) is rotatably connected with the inner end wall of the cylindrical cavity through a lead screw (20), a corresponding moving sleeve (21) is connected onto the lead screw (20) in a threaded manner, the upper side wall and the lower side wall of each moving sleeve (21) are fixedly connected with corresponding connecting rods (14), a strip-shaped opening (13) matched with the connecting rod (14) is formed in each strip-shaped block, the strip-shaped opening (13) is communicated with the cylindrical cavity, and one end, far away from the moving sleeve (21), of each connecting rod (14) is fixedly connected with a corresponding bending piece (3), each inner wall of the bending piece (3) is propped against the side wall of the support bracket (1).
3. A joist structure as claimed in claim 2, wherein: the supporting bracket (1) is arranged to be flat U-shaped, matching blocks (4) corresponding to the positions of the adjusting blocks (2) are arranged in the supporting bracket (1), and one end, away from the connecting rod (14), of each bending piece (3) is fixedly connected with the corresponding matching block (4) together.
4. A joist structure as claimed in claim 3, wherein: the top end of the butt joint rod (5) is provided with a butt joint bulge (16), and the lower end of the support column (7) is provided with a butt joint groove matched with the butt joint bulge (16).
5. A joist structure as claimed in claim 4, wherein: the top end of the butt joint rod (5) is arranged to be a round table body, and the lower end of the support column (7) is provided with a butt joint cover (6) matched with the round table body.
6. A joist structure for supporting formwork as claimed in claim 5, wherein: the inner wall of the upper book of the supporting plate (8) is fixedly provided with a plurality of groups of evenly distributed limiting assemblies (801), and the plurality of groups of limiting assemblies (801) are annularly arranged around the opening (10).
7. A joist structure for supporting formwork as claimed in claim 6, wherein: every group spacing subassembly (801) all include gag lever post and spacing piece, gag lever post and spacing piece fixed connection, and the gag lever post other end and layer board (8) upside inner wall fixed connection.
8. A joist structure as claimed in claim 7, wherein: fixedly connected with multiunit evenly distributed's stiffener (15) between support column (7) lateral wall upper end and layer board (8) lower lateral wall, multiunit stiffener (15) all set the type of bending to.
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