CN114525876B

CN114525876B - Roof steel frame structure

Info

Publication number: CN114525876B
Application number: CN202210419857.1A
Authority: CN
Inventors: 李新宇; 周杨; 李伟宇; 王彬; 周亮; 李向前; 王武; 王晨曦
Original assignee: Hunan Xihu Construction Group Co ltd
Current assignee: Hunan Xihu Construction Group Co ltd
Priority date: 2022-04-21
Filing date: 2022-04-21
Publication date: 2022-06-28
Anticipated expiration: 2042-04-21
Also published as: CN114525876A

Abstract

The invention discloses a roof steel frame structure, comprising: the bottom surface of the main framework is provided with an installation cavity formed by inward depression; the bone rods are obliquely and symmetrically lapped on the left side and the right side of the main framework; the fixed limiting part is fixedly arranged at the upper end of the main framework and is matched with the main framework to limit and fix the bone rod; the light-transmitting plate is provided with a first position for covering the opening at the lower end of the mounting cavity and a second position which is movably arranged below the mounting cavity and opens the opening at the lower end of the mounting cavity, and the light-transmitting plate is movably arranged on the main framework in a lifting manner so as to realize the switching between the first position and the second position; the lamp holder is detachably mounted on the upper end face of the light-transmitting plate, and a lamp is detachably mounted on the lamp holder. According to the invention, each bone rod is not required to be connected independently by a bolt, and all the bone rods on two sides can be limited and fixed only by installing and fixing the fixed limiting part and the main framework, so that the installation is simple and convenient, and the number and installation of fasteners are reduced.

Description

Roof steel frame structure

Technical Field

The invention relates to the field of roof structures, in particular to a roof steel frame structure.

Background

At present, a roof is an important part of a house building, and has functions of wind and rain shielding, heat preservation and heat insulation, and in the prior art, a main structure of the roof of a roof is usually designed into a modular steel structure form, and is usually composed of structural steel, steel plates, steel columns and the like.

But present traditional steel construction roof main part, its installation and later maintenance are comparatively troublesome.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the roof steel frame structure is simpler to install and simpler and more convenient to maintain in the later period.

A roof steel frame structure according to an embodiment of the first aspect of the invention includes: the bottom surface of the main framework is provided with an installation cavity formed by inward depression; the bone rods are obliquely and symmetrically lapped on the left side and the right side of the main framework; the fixed limiting part is fixedly arranged at the upper end of the main framework and is matched with the main framework to limit and fix the bone rod; the light-transmitting plate is provided with a first position for covering the opening at the lower end of the mounting cavity and a second position which is movably arranged below the mounting cavity and opens the opening at the lower end of the mounting cavity, and the light-transmitting plate is movably arranged on the main framework in a lifting manner so as to realize the switching between the first position and the second position; the lamp holder is detachably mounted on the upper end face of the light-transmitting plate, and a lamp is detachably mounted on the lamp holder.

The roof steel frame structure provided by the embodiment of the invention at least has the following technical effects: each bone rod is not required to be connected independently through a bolt, all the bone rods on two sides can be limited and fixed only through the fixing limiting part and the mounting and fixing of the main framework, the mounting is simple and convenient, and the number and the mounting of fasteners are reduced; in addition, the light-transmitting plate protects the lamp in the mounting cavity, the lamp is prevented from being exposed outside, and in the process of mounting and dismounting, the lamp holder and the lamp can extend out of the mounting cavity only by lifting and adjusting the light-transmitting plate, so that the lamp can be mounted and dismounted, and the lamp is simpler and more convenient to dismount.

According to some embodiments of the invention, the light-transmitting plate further comprises a detent for supporting the light-transmitting plate in the first position.

According to some embodiments of the invention, guide pillars extending upwards are arranged at four corners of the light-transmitting plate, a through hole for the guide pillars to penetrate through is arranged on the top wall of the installation cavity, the middle parts of two guide pillars on the same side are connected through a connecting rod, the upper ends of the guide pillars penetrate through the top wall of the installation cavity and are connected with a top nut, and the profile of the top nut is larger than that of the through hole; the screens piece has the support position of bearing first position connecting rod and avoids the position of avoiding of connecting rod lift route, the rotatory switching of installing in order to realize support position and avoiding the position in the main frame of screens piece.

According to some embodiments of the invention, the clamping element comprises a vertical shaft and a rotating rod, the vertical shaft is rotatably mounted on the main framework along the axis of the vertical shaft, the rotating rod horizontally extends from the upper end of the vertical shaft to the outside in the radial direction, a bearing groove is arranged at the outer end of the rotating rod, the bearing groove is used for clamping the connecting rod, and when the connecting rod is clamped in the bearing groove, the rotation of the clamping element can be limited, so that the clamping element is kept at a supporting position; when the connecting rod moves upwards to abut against the top wall of the installation cavity, the connecting rod is separated from the supporting groove; the installation cavity lateral wall is equipped with the via hole that supplies the rotary rod rotation to pass through.

According to some embodiments of the invention, the vertical shaft comprises a main shaft section with a gradually decreasing cross-sectional profile, a rotation guide section, a torque connection section and a threaded section, the main skeleton is provided with a round hole adapted to the rotation guide section, the torque connection section is connected with a rotation handle capable of rotating synchronously, and the threaded section is connected with a bottom nut for limiting the rotation handle.

According to some embodiments of the invention, the upper end of the light-transmitting plate is provided with a horizontally extending guide rail, the bottom of the lamp holder is provided with a sliding groove which is adapted to the guide rail and can slide along the guide rail, and the lamp can move along with the lamp holder and extend out of the side of the light-transmitting plate at the second position.

According to some embodiments of the invention, one end of the guide rail is provided with a resisting wall, and when the light-transmitting plate is in the first position, one end of the lamp holder is attached to the resisting wall, and the other end of the lamp holder is provided with a pull handle attached to a side wall of the installation cavity.

According to some embodiments of the invention, a backrest plate is fixedly arranged at the upper end of the lamp holder, a stop lever is hinged at the upper end of the lamp holder and is positioned on one side of the backrest plate back to the stop wall, a tension spring is connected between the stop lever and the lamp holder and is used for pulling the stop lever to abut against the backrest plate, and when the stop lever abuts against the backrest plate, the upper end of the stop lever is higher than the bottom end of the connecting rod so as to limit the sliding stroke of the lamp holder; the back-up plate highly is less than the connecting rod bottom, keep off the position pole and can wind the pin joint rotation activity to being less than the connecting rod bottom.

According to some embodiments of the invention, the left side and the right side of the bottom end of the main framework horizontally extend outwards to form supporting plates, and supporting blocks are arranged at the outer ends of the supporting plates; the cross section of the bone rod is I-shaped, grooves are formed in two sides of the bone rod, and the grooves in the two sides are separated by a partition plate in the middle; the bone pole middle part is equipped with in baffle both sides and dodges the position, the supporting shoe middle part is equipped with the caulking groove that supplies the baffle embedding, the supporting shoe embedding dodges the position and supports the bone pole, the supporting shoe has the locating piece of embedding recess towards the protruding bone pole top.

According to some embodiments of the invention, the fixed limiting part is provided with a pressing block, and the pressing block is vertically embedded into a groove at the top end of the bone rod; the bottom of the pressing block is provided with a pressing pad which is abutted against the bottom wall of the groove.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of an installation structure of an embodiment of the present invention;

FIG. 2 is an enlarged view taken at A of FIG. 1;

FIG. 3 is an exploded view of an installation of an embodiment of the present invention;

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

FIG. 5 is a sectional view of the interior of the mounting cavity;

FIG. 6 is a schematic view of the light-transmitting panel in a first position;

FIG. 7 is a schematic view of the connecting rod in a state disengaged from the bracket;

FIG. 8 is a bottom view structural schematic of the main frame;

FIG. 9 is a schematic view of the lamp holder and the light-transmitting plate in an exploded state;

FIG. 10 is a schematic view of the detent;

fig. 11 is a schematic view of a connection structure of a lamp holder and a light-transmitting plate according to another embodiment.

Reference numerals:

the main framework 100, the cavity 101, the cover shell 102, the mounting cavity 110, the through hole 111, the via hole 112, the round hole 113, the wire passing hole 114, the support plate 120, the support block 130, the positioning block 131, the caulking groove 132, the attaching block 140, the connecting block 150 and the limit strip 160;

the bone rod 200, the partition plate 210, the groove 220 and the avoiding position 230;

a fixed limiting member 300, a pressing block 310 and a pressing pad 320;

the light-transmitting plate 400, the guide pillar 410, the top nut 411, the connecting rod 420, the guide rail 430 and the retaining wall 431;

the lamp holder 500, the sliding groove 510, the lamp 520, the pull handle 530 and the back plate 540;

a clamping member 600, a vertical shaft 610, a main shaft section 611, a rotary guide section 612, a torque connecting section 613, a bottom nut 614, a rotary rod 620, a bearing groove 630 and a rotary handle 640;

a gear lever 700 and a tension spring 710.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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.

Referring to fig. 1 to 4, a roof steel frame structure according to an embodiment of the present invention includes a main frame 100, a rod 200, a fixing stopper 300, a light-transmitting plate 400, and a lamp holder 500.

The bottom surface of the main framework 100 is provided with an installation cavity 110 formed by inward depression, the center of the main framework 100 is provided with a cavity 101, the top wall of the installation cavity 110 protrudes from the cavity 101, the installation cavity 110 protrudes towards the cavity 101 and forms a cover shell 102, and the side wall of the cover shell 102 is provided with a line passing hole 114 communicated with the cavity 101 for a power transmission line to pass through; the bone rods 200 are obliquely and symmetrically overlapped on the left and right sides of the main frame 100, and the bone rods 200 are arranged in the front-rear direction. The fixing limiting member 300 is fixedly mounted at the upper end of the main frame 100 and is matched with the main frame 100 to limit and fix the bone rod 200, and specifically, the fixing limiting member 300 and the upper end of the main frame 100 are provided with corresponding hole sites to be connected and fixed through bolts; the light-transmitting plate 400 has a first position covering the opening at the lower end of the mounting cavity 110 and a second position movably below the mounting cavity 110 and opening the opening at the lower end of the mounting cavity 110, and the light-transmitting plate 400 is movably mounted on the main frame 100 in a lifting manner to realize switching between the first position and the second position; the lamp holder 500 is detachably mounted on the upper end surface of the light-transmitting plate 400, the lamp 520 is detachably mounted on the lamp holder 500, and the lamp holder 500 can be provided with mounting holes for threaded connection of the lamp 520; when the light-transmitting plate 400 is in the second position, the lamp 520 can be installed or disassembled and replaced from the side, the operation is simple, and the lamp can be realized without disassembling the fastener.

According to the roof steel frame structure provided by the embodiment of the invention, each bone rod 200 is not required to be independently connected by a bolt, and all the bone rods 200 on two sides can be limited and fixed only by installing and fixing the fixed limiting piece 300 and the main framework 100, so that the installation is simple and convenient, and the number and installation of fasteners are reduced; in addition, the light-transmitting plate 400 protects the lamps in the installation cavity 110, the lamps are prevented from being exposed outside, and when the lamp is installed and disassembled, the lamp holder 500 and the lamps 520 can stretch out of the installation cavity 110 only by lifting and adjusting the light-transmitting plate 400, the lamps 520 are installed and disassembled, and the lamp is more simple and convenient to disassemble and assemble.

In some embodiments of the present invention, the front and rear sides of the main frame 100 are provided with the connecting blocks 150, the connecting blocks 150 are provided with the connecting holes, the two main frames 100 can be attached to each other through the connecting blocks 150 and assembled by installing bolts, and the number of the assembled main frames can be selected as required, so that the present invention is suitable for roof structures with different lengths, and simultaneously reduces the transportation volume of a single component, thereby facilitating transportation and storage.

In some embodiments of the present invention, the light-transmitting plate 400 further includes a retaining member 600, the retaining member 600 is used to support the light-transmitting plate 400 at the first position, the light-transmitting plate 400 is in the working state at the first position, and the retaining member 600 enables the light-transmitting plate 400 to maintain a stable position at the first position, so as to ensure the stability of the working state.

Referring to fig. 5 to 9, in some embodiments of the present invention, the light-transmitting plate 400 is provided with guide posts 410 extending upward at four corners, the top wall of the mounting cavity 110 is provided with through holes 111 for the guide posts 410 to penetrate, and the guide posts 410 are fitted into the through holes 111 to perform a positioning and guiding function. The middle parts of the two guide pillars 410 on the same side are connected by a connecting rod 420, that is, the two guide pillars 410 on the left side and the two guide pillars 410 on the right side are respectively connected by a connecting rod 420, and the connecting rod 420 can reinforce the structural strength of the guide pillars 410. The upper end of the guide post 410 penetrates through the top wall of the mounting cavity 110 and is connected with a top nut 411, the profile of the top nut 411 is larger than that of the through hole 111, and when the light-transmitting plate 400 is located at the second position, the top nut 411 abuts against the top wall of the housing 102 to support and limit the light-transmitting plate 400. The locking member 600 has a support position for supporting the first position coupling rod 420 and a release position for releasing the lifting path of the coupling rod 420, and when the transparent plate 400 is required to maintain the first position, the locking member 600 maintains the position of the transparent plate 400 at the first position by supporting the coupling rod 420. The screens 600 are rotatably installed on the main frame 100 to realize the switching between the supporting position and the avoiding position, when the light-transmitting plate 400 is required to be switched from the first position to the second position, only the connecting rod 420 is required to be separated from the screens 600, then the screens 600 are rotatably moved to the avoiding position, so that the screens 600 do not interfere with the lifting of the connecting rod 420, the light-transmitting plate 400 can be lowered to the second position, the switching between the positions is realized, and the stability of the second position is realized by the top nut 411.

Referring to fig. 10, in a further embodiment of the present invention, the detent element 600 includes a vertical shaft 610, a rotary shaft 620, the vertical shaft 610 is rotatably mounted on the main frame 100 along its axis, the rotary shaft 620 extends horizontally and radially outward from the upper end of the vertical shaft 610, a receiving slot 630 is provided at the outer end of the rotary shaft 620, i.e. the receiving slot 630 is provided at the end of the rotary shaft 620 away from the vertical shaft 610, the upper end of the receiving slot 630 is opened for the connecting rod 420 to be inserted into, so as to support and limit the connecting rod 420, and when the connecting rod 420 is inserted into the receiving slot 630, the rotation of the detent element 600 can be limited, i.e. the connecting rod 420 is inserted into the receiving slot 630, the rotation of the detent element 600 can not be switched, so that the detent element 600 can maintain the supporting position, i.e. the light-transmitting plate 400 can be maintained at the first position, so that when the light-transmitting plate 400 is at the first position, the state is stable; when the connecting rod 420 moves upwards to abut against the top wall of the installation cavity 110, the connecting rod 420 is separated from the supporting groove 630, at this time, the clamping piece 600 can rotate to avoid the connecting rod 420, then the light-transmitting plate 400 can be lowered to the second position to realize position switching, and the connecting rod 420 is judged to be separated from the supporting groove 630 by abutting against the connecting rod 420 and the top wall of the installation cavity 110, so that judgment and the next operation are facilitated; the lateral wall of installation cavity 110 is equipped with the rotatory via hole 112 that passes of confession rotary rod 620, for convenient judgement screens piece 600 reachs the support position, when screens piece 600 is in the support position, rotary rod 620 lateral wall offsets with via hole 112 lateral wall, during the operation, only need screens piece 600 rotatory to offset with via hole 112 lateral wall, when can not rotate, can judge screens piece 600 and be in the support position, conveniently judge and carry out subsequent operation. In addition, the bottom wall of the rotary rod 620 is flush with the bottom wall of the via hole 112, and when the bottom wall of the rotary rod 620 contacts with the bottom wall of the via hole 112, the bottom wall of the via hole 112 can play a certain supporting role, so that stress is prevented from being totally concentrated at the position where the rotary rod 620 is connected with the vertical shaft 610.

In some embodiments of the present invention, vertical shaft 610 includes a main shaft segment 611, a rotation guide segment 612, a torque connection segment 613 and a threaded segment, main shaft segment 611, rotation guide segment 612, torque connection segment 613 and threaded segment are sequentially arranged from top to bottom and gradually decrease in cross-sectional profile, and a rotation rod 620 is connected to the upper end of main shaft segment 611. Main skeleton 100 is equipped with the round hole 113 with rotatory guide section 612 adaptation, round hole 113 specifically locates cavity 101 diapire and is located housing 102 side, main shaft section 611 stretches into in the cavity 101, the shaft shoulder that main shaft section 611 and rotatory guide section 612 formed offsets with cavity 101 diapire, it is spacing to realize supporting, torque connection section 613 is connected with a rotatory handle 640 that can rotate in step, it is specific, torque connection section 613 cross-section is the polygon, rotatory handle 640 center is equipped with the centre bore with torque connection section 613 cross-section adaptation, torque connection section 613 is located to rotatory handle 640 cover, the screw thread section is connected with and is used for the spacing end nut 614 to rotatory handle 640, end nut 614 prevents that rotatory handle 640 from breaking away from torque connection section 613, rotatory handle 640 makes things convenient for manual rotation operation screens 600.

Referring to fig. 7 and 9, in some embodiments of the present invention, the upper end of the light-transmitting plate 400 is provided with a horizontally extending guide rail 430, the bottom of the lamp holder 500 is provided with a sliding groove 510 adapted to the guide rail 430 and capable of sliding along the guide rail 430, and the cross sections of the sliding groove 510 and the guide rail 430 are in a dovetail shape to realize the limit in the up-down direction; the lamp 520 can move with the lamp holder 500 and extend out from the side of the light-transmitting plate 400 at the second position, so that the lamp can be conveniently installed and disassembled, and the lamp does not need to be installed and disassembled at a narrow position above the light-transmitting plate 400, and is convenient to install.

In a further embodiment of the present invention, the guide rail 430 is provided at one end with a stopper wall 431, and the stopper wall 431 serves to limit a sliding range of the lamp holder 500. When the light-transmitting plate 400 is in the first position, one end of the lamp holder 500 is attached to the resisting wall 431, and the other end of the lamp holder 500 is provided with the pull handle 530 attached to the side wall of the installation cavity 110, so that the limitation is realized, the position stability in the working state is ensured, the existing structure of the side wall of the installation cavity 110 is utilized, the structure is ingenious and simple, the limitation is only temporary, when the light-transmitting plate 400 is in the second position, the side wall of the installation cavity 110 is naturally separated from the pull handle 530, the limitation is naturally removed, no additional action is needed to be added, and then the pull handle 530 can be directly pulled to pull out the part of the lamp holder 500, so that the lamp 520 extends out of the light-transmitting plate 400, and the disassembly and the installation are convenient.

Referring to fig. 11, in some embodiments of the present invention, a backrest plate 540 is fixedly disposed at the upper end of a lamp holder 500, the upper end of the lamp holder 500 is hinged to a position-blocking rod 700, the position-blocking rod 700 is disposed at a side of the backrest plate 540, which faces away from a blocking wall 431, and a tension spring 710 is connected between the position-blocking rod 700 and the lamp holder 500, specifically, the position-blocking rod 700 and the lamp holder 500 may be provided with a shackle for the tension spring 710 to hook, the tension spring 710 is used to pull the position-blocking rod 700 to abut against the backrest plate 540, and when the position-blocking rod 700 abuts against the backrest plate 540, the upper end of the position-blocking rod 700 is higher than the bottom end of the connecting rod 420, so as to limit the sliding stroke of the lamp holder 500, and prevent the lamp holder 500 from being completely pulled out to separate from the light-transmitting plate 400; the backrest 540 highly is less than the connecting rod 420 bottom, keeps off the position pole 700 and can move about around the pin joint rotation to being less than the connecting rod 420 bottom, and during installation and dismantlement, will keep off the position pole 700 and rotate to push down and can stimulate lighting fixture 500 to breaking away from light-passing board 400.

Referring to fig. 1 to 3, in some embodiments of the present invention, support plates 120 are horizontally extended outward from the left and right sides of the bottom end of the main frame 100, and support blocks 130 are provided at the outer ends of the support plates 120; the cross section of the bone rod 200 is I-shaped, grooves 220 are arranged on two sides of the bone rod 200, and the grooves 220 on the two sides are separated by a partition plate 210 in the middle; avoidance positions 230 are arranged at two sides of the partition plate 210 in the middle of the bone rod 200, an embedding groove 132 for the partition plate 210 to be embedded in is arranged in the middle of the supporting block 130, the supporting block 130 is embedded in the avoidance positions 230 and supports the bone rod 200, a positioning block 131 embedded in the groove 220 is protruded towards the top end of the bone rod 200 from the supporting block 130, the size of the avoidance positions 230 is enough for the supporting block 130 and the positioning block 131 to be embedded together, during installation, the supporting block 130 and the positioning block 131 are embedded in the avoidance positions 230 together, then the bone rod 200 slides downwards, the positioning block 131 is embedded in the groove 220, and the supporting block 130 is also abutted against the bone rod to realize support. The supporting block 130 can support the bone rod 200, and the positioning block 131 plays a role in limiting and positioning, so that the installation stability of the bone rod 200 is improved.

In some embodiments of the present invention, the fixing limiting member 300 is provided with a pressing block 310, the pressing block 310 is vertically embedded into the groove 220 at the top end of the bone rod 200, and since the bone rod 200 is obliquely arranged, the opening at the top end of the groove 220 is also obliquely upward, so that the pressing block 310 can be vertically embedded into the groove 220; the bottom of the pressing block 310 is provided with a pressing pad 320, the pressing pad 320 abuts against the bottom wall of the groove 220, and the pressing pad 320 is made of rubber. In addition, the top end of the main frame 100 is provided with an abutting block 140 which is attached to the bottom surface of the top end of the bone rod 200, so as to improve the limit and support of the top end of the bone rod 200. When the fixing limiting member 300 is connected to the bone rod 200, the pressing block 310 may exert a strong pressure on the bone rod 200, and the pressing pad 320 may buffer the force to some extent, and the abutting block 140 may support the force to clamp the bone rod 200, thereby limiting the top end of the bone rod 200.

In addition, main skeleton 100 upper end both sides are equipped with spacing 160, and spacing 160 interval sets up for the embedding of bone pole 200, fixes a position bone pole 200 fore-and-aft direction.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example" or "some examples" 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.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A roof steel frame structure, comprising:

The bottom surface of the main framework (100) is provided with an installation cavity (110) formed by inward depression;

the bone rods (200) are obliquely and symmetrically overlapped at the left side and the right side of the main framework (100);

the fixed limiting piece (300) is fixedly arranged at the upper end of the main framework (100) and is matched with the main framework (100) to limit and fix the bone rod (200);

the light-transmitting plate (400) is provided with a first position for covering the lower end opening of the installation cavity (110) and a second position which can move to the lower part of the installation cavity (110) and open the lower end opening of the installation cavity (110), and the light-transmitting plate (400) is movably installed on the main framework (100) in a lifting mode to achieve switching between the first position and the second position;

the lamp holder (500) is detachably mounted on the upper end face of the light-transmitting plate (400), and a lamp (520) is detachably mounted on the lamp holder (500);

the light-transmitting plate (400) at the first position is supported by the clamping piece (600); guide columns (410) extending upwards are arranged at four corners of the light-transmitting plate (400), through holes (111) for the guide columns (410) to penetrate through are formed in the top wall of the mounting cavity (110), the middle parts of the two guide columns (410) on the same side are connected through a connecting rod (420), the upper ends of the guide columns (410) penetrate through the top wall of the mounting cavity (110) and are connected with ejection nuts (411), and the outlines of the ejection nuts (411) are larger than the through holes (111); the clamping piece (600) is provided with a supporting position for supporting the first position connecting rod (420) and an avoiding position for avoiding the lifting path of the connecting rod (420), and the clamping piece (600) is rotatably arranged on the main framework (100) to realize the switching between the supporting position and the avoiding position;

The clamping element (600) comprises a vertical shaft (610) and a rotating rod (620), the vertical shaft (610) is rotatably mounted on the main skeleton (100) along the axis of the vertical shaft (610), the rotating rod (620) horizontally extends outwards from the upper end of the vertical shaft (610), the outer end of the rotating rod (620) is provided with a supporting groove (630), the supporting groove (630) is used for the connecting rod (420) to be clamped in, and when the connecting rod (420) is clamped in the supporting groove (630), the rotation of the clamping element (600) can be limited, so that the clamping element (600) is kept at a supporting position; when the connecting rod (420) moves upwards to abut against the top wall of the installation cavity (110), the connecting rod (420) is separated from the supporting groove (630); the side wall of the mounting cavity (110) is provided with a through hole (112) for the rotating rod (620) to rotate through.

2. The roof steel frame structure of claim 1, wherein: the vertical shaft (610) comprises a main shaft section (611), a rotary guide section (612), a torque connecting section (613) and a thread section, the cross section of the main shaft section is gradually reduced, the main framework (100) is provided with a round hole (113) matched with the rotary guide section (612), the torque connecting section (613) is connected with a rotary handle (640) capable of rotating synchronously, and the thread section is connected with a bottom nut (614) used for limiting the rotary handle (640).

3. The roof steel frame structure of claim 1, wherein: light-transmitting board (400) upper end is equipped with horizontally extending's guide rail (430), lighting fixture (500) bottom is equipped with and follows guide rail (430) adaptation and can follow guide rail (430) gliding spout (510), lamps and lanterns (520) can be along with lighting fixture (500) activity and stretch out from the side of light-transmitting board (400) of second position.

4. The roof steel frame structure of claim 3, wherein: guide rail (430) one end is equipped with and keeps off wall (431), when light-passing board (400) were in the first position, lighting fixture (500) one end pasted mutually with keeping off wall (431), and the other end is equipped with pull handle (530) that pastes with installation cavity (110) lateral wall.

5. The roof steel frame structure of claim 4, wherein: a backrest plate (540) is fixedly arranged at the upper end of the lamp holder (500), a blocking rod (700) is hinged to the upper end of the lamp holder (500), the blocking rod (700) is located on one side, back to the blocking wall (431), of the backrest plate (540), a tension spring (710) is connected between the blocking rod (700) and the lamp holder (500), the tension spring (710) is used for pulling the blocking rod (700) to abut against the backrest plate (540), and when the blocking rod (700) abuts against the backrest plate (540), the upper end of the blocking rod (700) is higher than the bottom end of the connecting rod (420) so as to limit the sliding stroke of the lamp holder (500); the height of the backrest plate (540) is lower than the bottom end of the connecting rod (420), and the stop lever (700) can rotate around a hinge point to be lower than the bottom end of the connecting rod (420).

6. The roof steel frame structure of claim 1, wherein: the left side and the right side of the bottom end of the main framework (100) extend outwards horizontally to form a support plate (120), and a support block (130) is arranged at the outer end of the support plate (120); the cross section of the bone rod (200) is I-shaped, grooves (220) are formed in two sides of the bone rod, and the grooves (220) in the two sides are separated by a partition plate (210) in the middle; bone pole (200) middle part is equipped with in baffle (210) both sides and dodges position (230), supporting shoe (130) middle part is equipped with caulking groove (132) that supply baffle (210) embedding, supporting shoe (130) embedding dodges position (230) and supports bone pole (200), supporting shoe (130) have locating piece (131) of embedding recess (220) towards the protruding top of bone pole (200).

7. The roof steel frame structure of claim 6, wherein: the fixed limiting piece (300) is provided with a pressing block (310), and the pressing block (310) is vertically embedded into the groove (220) at the top end of the bone rod (200); the bottom of the pressing block (310) is provided with a pressing pad (320), and the pressing pad (320) is abutted to the bottom wall of the groove (220).