阅读说明：本技术 一种轻钢建筑墙体及其预制安装方法 (Light steel building wall and prefabricated installation method thereof ) 是由 程文初 于 2021-10-11 设计创作，主要内容包括：一种轻钢建筑墙体及其预制安装方法,包括有主体和轻钢骨架,主体内部固定连接有轻钢骨架,主体一侧开口设置有嵌合槽长方形状凹槽,嵌合块上下两侧凸出部分嵌合设置有与圆弧槽螺纹嵌合的转轴,轻钢骨架嵌合嵌合槽一侧中部嵌合设置有若干嵌合方块方块,轻钢骨架嵌合在嵌合块一侧开口设置有与嵌合方块嵌合的方形凹槽,嵌合方块两侧表面设置有贴合槽长方形状凹槽,方形凹槽中部两侧凸出部分与贴合槽嵌合的圆轴。通过该装置设置的嵌合方块能够在主体相互组合拼接在一起的时候,通过推动主体的组合来带动嵌合方块进行延伸,让其能够与另外一个主体中的轻钢骨架进行嵌合连接,使得主体之间的连接不会只单单通过其表面的铆接来进行稳定连接。(A light steel building wall and a prefabricating and installing method thereof comprise a main body and a light steel framework, wherein the light steel framework is fixedly connected in the main body, a rectangular groove of an embedding groove is formed in an opening on one side of the main body, a rotating shaft embedded with an arc groove in a threaded manner is arranged on protruding parts on the upper side and the lower side of the embedding block in an embedding manner, a plurality of embedding square blocks are embedded in the middle of the embedding groove on the light steel framework in an embedding manner, a square groove embedded with the embedding square blocks is formed in an opening on one side of the embedding block in an embedding manner, rectangular grooves of a fitting groove are formed in the surfaces on the two sides of the embedding square blocks, and circular shafts embedded with the fitting grooves are arranged on two side protruding parts in the middle of the square groove. The gomphosis square that sets up through the device can be when the main part makes up the concatenation each other together, drives the gomphosis square through the combination that promotes the main part and extends, lets it can carry out the gomphosis with the light steel skeleton in another main part and is connected for connection between the main part can not only singly carry out stable connection through the riveting on its surface.)

1. A light steel building wall comprises a main body (1) and a light steel framework (2), wherein the light steel framework (2) is fixedly connected inside the main body (1), and the light steel building wall is characterized in that; the light steel frame is characterized in that the two sides of the main body (1) are provided with an embedded groove (101) and an embedded block (102) which are embedded with each other, the embedded groove (101) is provided with an arc groove (1011) which is embedded with a rotating shaft (1021) on the embedded block (102), the light steel frame (2) is positioned in grooves on the two sides of the embedded groove (101) and the embedded block (102) and is provided with an embedded square block (201) and a square groove (202) which are embedded with each other, the two sides of the embedded square block (201) are provided with grooves of an attached groove (2012) which is embedded with a round shaft (2021) on the square groove (202), and the peripheral surface of the round shaft (2021) is movably connected with an arc block (2022) which is arranged through a bending block (2023).

2. A lightweight steel building wall according to claim 1, wherein: the main body (1) comprises a tabling groove (101) and a tabling block (102), wherein the tabling block (102) is a convex block which is tabled with the tabling groove (101) at one side of the main body (1).

3. A lightweight steel building wall according to claim 1, wherein: the embedding groove (101) comprises an arc groove (1011) and a supporting shaft (1012), and the supporting shaft (1012) is a circular shaft which is arranged on two sides of the groove of the arc groove (1011) in the embedding groove (101) in a protruding mode.

4. A lightweight steel building wall according to claim 1, wherein: the embedded block (102) comprises a rotating shaft (1021), and the rotating shaft (1021) is a protruding round shaft at the upper side and the lower side of the embedded block (102).

5. A lightweight steel building wall according to claim 1, wherein: the light steel framework (2) comprises an embedded square block (201) and a square groove (202), wherein the square groove (202) is a groove formed by embedding one side of the light steel framework (2) with the square block (201) on the other side.

6. A lightweight steel building wall according to claim 1, wherein: gomphosis square (201) are including flexible piece (2011), laminating groove (2012), arc wall (2013) and thread groove (2014), flexible piece (2011) is gomphosis square (201) one side square, arc wall (2013) set up the circular-arc recess of one end in gomphosis square (201) both sides laminating groove (2012) recess for the opening, thread groove (2014) are flexible piece (2011) bottom recess.

7. A lightweight steel building wall according to claim 1, wherein: the square groove (202) comprises a round shaft (2021), an arc-shaped block (2022), a bent block (2023) and a bent groove (2024), the arc-shaped block (2022) is a convex block connected to the periphery of the round shaft (2021) through the bent block (2023) at one end, and the bent groove (2024) is a groove which is formed in the groove of the round shaft (2021) and the arc-shaped block (2022) and is embedded with the bent block (2023).

8. A light steel building wall prefabricating and mounting method comprises the following steps:

firstly, measuring the size and the shape of a building to be installed, and then manufacturing a light steel framework (2) with a corresponding size;

secondly, the manufactured light steel framework (2) is wrapped by the main body (1) and connected together by rivets, so that a prefabricated wall body with a prefabricated shape and a prefabricated size is manufactured;

thirdly, mounting the manufactured prefabricated light steel wall body (1) on the ground according to a specified position, and then enabling the prefabricated light steel wall body to be combined and mounted into a specified building by mutually attaching, splicing and connecting the plurality of bodies (1);

in the third step, when the main body (1) and the other main body (1) are spliced and combined together, the convex block of the embedded block (102) at one side of the main body (1) is embedded into the embedded groove (101) at one side of the other main body for embedding, then the embedded block (102) moves along the embedded groove (101) by pushing the main body (1), so that the rotating shaft (1021) on the embedded block (102) is driven to rotate, the embedded block (201) on the light steel framework (2) extends out to be embedded into the square groove (202) on the light steel framework (2) in the other main body (1) for connection, then when the embedded block (201) is embedded into the square groove (202), the arc-shaped block (2022) on the round shaft (2021) extends into the arc-shaped groove (2013) of the attaching groove (2012) for embedding connection, so that the light steel frameworks (2) inside the main body (1) can be connected with each other in a certain way when being spliced and combined together, the light steel framework is connected by riveting and casting, so that the connection between the main bodies (1) is more stable, and the connection of the light steel framework (2) cannot be influenced when the main bodies (1) are damaged.

Technical Field

The invention relates to the technical field of prefabricated walls, in particular to a light steel building wall and a prefabricated installation method thereof.

Background

The prefabricated wall body is characterized in that the wall surface of a building is split, each part of the wall surface is independently manufactured to form a plurality of plates, the building is built by combining and building the plates, the light steel wall body in the existing wall body manufacturing is a manufacturing method and a plate which are common in the existing prefabricated wall body, the plates are installed on two sides of specific light steel to form a whole, the prefabricated wall body is manufactured, but the combined connection between the wall bodies is realized by riveting the plates on the surfaces of the two sides together, and the plates on the surfaces of the two sides are easily riveted and loosened when the plates on the surfaces of the two sides are damaged, so that the prefabricated wall body can be separated.

Disclosure of Invention

Problem (A)

In summary, the invention provides a light steel building wall and a prefabrication and installation method thereof, which are used for solving the problems that the existing light steel building wall is connected in a riveting mode during installation, and a plate riveted on the surface is easy to loosen and separate when the plate is damaged.

(II) technical scheme

A light steel building wall and a prefabricating and installing method thereof comprise a main body and a light steel framework, wherein the light steel framework is fixedly connected in the main body, an embedding groove rectangular groove is formed in an opening on one side of the main body, an embedding block protruding block which is embedded into the embedding groove is convexly arranged on the other side of the main body, arc grooves are formed in openings on the upper side and the lower side of the middle of the embedding groove, rotating shafts which are in threaded embedding with the arc grooves are embedded into protruding parts on the upper side and the lower side of the embedding block, a plurality of embedding square blocks are embedded into the middle of one side of the embedding groove of the light steel framework, a square groove which is embedded into the embedding square blocks is formed in an opening on one side of the embedding block of the light steel framework, attaching groove rectangular grooves are formed in surfaces on two sides of the embedding square blocks, and round shafts which are embedded into the attaching grooves are protruded parts on two sides of the middle of the square groove.

Furthermore, the main body comprises an embedded groove and an embedded block, wherein the embedded groove is a rectangular groove on one side of the main body, the embedded groove is communicated with the middle part of the light steel framework connected with the inside of the main body, the embedded block is a rectangular square block embedded with the embedded groove on the other side of the main body, and the convex blocks of the embedded block are communicated with the hollow part of the light steel framework connected with the inside of the main body.

Further, the tabling groove comprises an arc groove and a support shaft, the arc groove is a groove with arc surfaces on the upper side and the lower side of the middle of the tabling groove, and the support shaft is a circular shaft with a convex part on the upper side and the lower side of the middle of the tabling groove and on the two sides of the middle of the arc groove.

Furthermore, the embedded block comprises a rotating shaft, the rotating shaft is a circular shaft which is embedded and arranged by the convex parts at the upper side and the lower side of the convex block of the embedded block, and the peripheral surface of the rotating shaft is embedded and connected with the circular arc groove and the surface of the abutting shaft through threads.

Furthermore, the light steel framework comprises an embedded square block and a square groove, the embedded square block is a plurality of rectangular square blocks embedded in the middle of the part of the embedded groove, which is embedded in the light steel framework, the square groove is a rectangular groove embedded in the hollow part between the embedded blocks, which is embedded in the other side of the light steel framework, and the square groove is embedded in the embedded square block.

Further, the gomphosis square is including flexible piece, laminating groove and arc wall, and flexible piece is the smaller square of gomphosis square one side connection in the light steel skeleton upper groove, and the laminating groove is the rectangular form recess for gomphosis square both sides surface, and laminating groove one end is the inclined plane that is the arc form, and the arc wall is the recess that laminating groove one end arc inclined plane middle part is circular-arc crooked extension.

Further, square groove is including the circle axle, the arc piece, crooked piece and crooked groove, the circle axle that the gomphosis of square groove both sides bulge set up is regarded as to the circle axle, and circle axle bulge and laminating groove recess looks gomphosis, the arc piece is the crooked lug that sets up of the circular arc of gomphosis around the circle axle, and arc piece and arc groove recess looks gomphosis, crooked piece is the square that arc piece gomphosis setting is circular-arc crooked extension in the recess around the circle axle, the crooked groove is the recess that is circular-arc crooked extension in connecting arc piece recess around the circle axle, and crooked groove and arc piece looks gomphosis.

(III) advantageous effects

(1) The gomphosis square that sets up through the device can be when the main part makes up the concatenation each other together, drives the gomphosis square through the combination that promotes the main part and extends, lets it can carry out the gomphosis with the light steel skeleton in another main part and is connected for connection between the main part can not only singly carry out stable connection through the riveting on its surface.

(2) The device still is provided with the arc piece, the combination lets in gomphosis square and other main part in the time of square groove gomphosis connection on the light steel skeleton between the main part, can force the circle axle on the square groove to begin to rotate, thereby let the circle axle let its arc piece extend the gomphosis because self rotation in the arc wall on the gomphosis square, make its arc piece can complete gomphosis extend into in the arc wall, and because the arc bending of arc piece and arc wall sets up, make can't separate through dragging when complete gomphosis is together, thereby make its gomphosis square can not easy separation when the gomphosis advances in the square groove.

(3) The device still is provided with the curved groove, can extend the gomphosis completely through the curved groove and advance the curved groove in the curved block, consequently can carry out certain application of force to curved block itself because can't continue to extend, let its curved block take place certain skew, thereby force the curved block of bottom also can bend and extend and carry out the gomphosis in the curved groove, make the both ends of its curved block can both connect, let its connect more stability, make when the main part takes place to damage to riveting portion not hard up, because the interconnect of light steel skeleton lets also can not easy separation between its main part.

Drawings

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

FIG. 2 is an enlarged schematic view of FIG. 1 at A according to the present invention;

FIG. 3 is a schematic view of the overall structure of the arc groove and the rotating shaft according to the present invention;

FIG. 4 is a schematic view of the overall structure of the square block and the square groove of the present invention;

FIG. 5 is a schematic view of a connection structure of the embedded square and the square groove according to the present invention;

FIG. 6 is an enlarged view of the structure of FIG. 5 at B according to the present invention;

in fig. 1 to 6, the corresponding relationship between the part names or lines and the reference numbers is:

the light steel frame comprises a main body 1, a fitting groove 101, an arc groove 1011, a butt shaft 1012, a fitting block 102, a rotating shaft 1021, a light steel frame 2, a fitting square 201, a telescopic block 2011, a fitting groove 2012, an arc groove 2013, a threaded groove 2014, a square groove 202, a round shaft 2021, an arc block 2022, a bending block 2023 and a bending groove 2024.

Detailed Description

Please refer to fig. 1 to 6

A light steel building wall comprises a main body 1 and a light steel framework 2, wherein the light steel framework 2 is fixedly connected inside the main body 1, a rectangular groove of an embedding groove 101 is formed in an opening on one side of the main body 1, a convex block 102 which is embedded with the groove of the embedding groove 101 is convexly arranged on the other side of the main body 1, arc grooves 1011 are formed in openings on the upper side and the lower side of the middle of the groove of the embedding groove 101, rotating shafts 1021 which are in threaded embedding with the arc grooves 1011 are embedded in convex parts on the upper side and the lower side of the embedding block 102, a plurality of embedded square blocks 201 are embedded in the middle of the embedding groove 101 on the light steel framework 2, a square groove 202 which is embedded with the embedded square blocks 201 is formed in an opening on one side of the embedding block 102, rectangular grooves 2012 are formed in surfaces on the two sides of the embedded square blocks 201, and round shafts 2021 which are embedded in the grooves 2012 in the middle of the square grooves 202.

Preferably, the main body 1 includes a fitting groove 101 and a fitting block 102, the fitting groove 101 is a rectangular groove on one side of the main body 1, the groove of the fitting groove 101 is communicated with the middle part of the light steel framework 2 connected inside the main body 1, the fitting block 102 is a rectangular block engaged with the fitting groove 101 on the other side of the main body 1, and the projections of the fitting block 102 are communicated with the hollow part of the light steel framework 2 connected inside the main body 1. When the bodies 1 are assembled together, the fitting blocks 102 and the fitting grooves 101 on both sides of the body 1 are fitted with the fitting blocks 102 and the fitting grooves 101 on the other body 1, when the engaging block 102 is engaged with the engaging groove 101 and pushed, the rotating shaft 1021 of the engaging block 102 is engaged with the arc-shaped groove 1011 of the engaging groove 101 by screw thread to move, the rotation shaft 1021 starts to rotate when moving along the arc-shaped groove 1011 due to the threaded engagement of the two, when the rotation shaft 1021 rotates, it will drive the supporting shafts 1012 at both sides of the arc-shaped slot 1011 to start rotating, when the shaft 1012 rotates, the top protrusion will be screwed into the screw groove 2014 at the bottom of the fitting block 201 on the light steel skeleton 2, so that the rotation of the supporting shaft 1012 drives the engaging block 201 in the engaging groove 101 of the other main body 1 to extend from the light steel frame 2.

Preferably, the fitting groove 101 includes an arc groove 1011 and a fulcrum 1012, the arc groove 1011 is a groove with arc-shaped upper and lower surfaces in the middle of the groove of the fitting groove 101, and the fulcrum 1012 is a circular shaft with a convex portion on the upper and lower surfaces in the middle of the groove of the fitting groove 101 and on both sides of the middle of the arc groove 1011.

Preferably, the fitting block 102 includes a rotation shaft 1021, the rotation shaft 1021 is a circular shaft fitted with the protruding portions on the upper and lower sides of the protruding block of the fitting block 102, and the peripheral surface of the rotation shaft 1021 is screwed with the circular groove 1011 and the surface of the abutting shaft 1012.

Preferably, the light steel framework 2 comprises an embedding block 201 and a square groove 202, the embedding block 201 is a plurality of rectangular blocks embedded in the middle of a part of the embedding groove 101 where the light steel framework 2 is embedded, the square groove 202 is a rectangular groove embedded in a hollow part between the embedding blocks 102 at the other side of the light steel framework 2, and the groove of the square groove 202 is embedded in the embedding block 201. When the engaging block 201 extends from the light steel skeleton 2, it will engage into the square groove 202 on the light steel skeleton 2 in the slot between the engaging blocks 102, and because the width of the square groove 202 is larger than that of the engaging block 201, the engaging block 201 can still push the main body 1 to engage the engaging block 102 into the engaging groove 101 when engaging into the square groove 202, and when the engaging block 201 is fully engaged into the square groove 202, the attaching groove 2012 at one side of the engaging block 201 will attach to the round shaft 2021 at the protruding part of the square groove 202, and because the engaging block 201 continues to extend into the square groove 202, the attaching groove 2012 will rub the round shaft 2021 to make the round shaft 2021 start rotating, when the round shaft 2021 rotates, it will just move to the arc groove 2013 at one end of the attaching groove 2012, because of the rotation of the round shaft 2021, one end of the surrounding arc block 2022 will engage into the arc groove 2013, then the rotation of the shaft 2021 pushes the arc block 2022 to continuously extend into the arc groove 2013, so that the arc block 2022 can be completely embedded and extend into the arc groove 2013, and then the arc block 2022 and the arc groove 2013 are embedded in a curved shape, so that the arc block 2022 and the arc groove can not be separated by common pulling after the embedding.

Preferably, gomphosis square 201 is including flexible piece 2011, laminating groove 2012, arc groove 2013 and thread groove 2014, flexible piece 2011 is the smaller square of gomphosis square 201 one side connection in light steel skeleton 2 last recess mesocarp, laminating groove 2012 is that gomphosis square 201 both sides surface is rectangle form recess, and laminating groove 2012 recess one end is the inclined plane that is the arc form, arc groove 2013 is the recess that is circular-arc crooked extension in the middle part of the arc inclined plane of laminating groove 2012 recess one end, thread groove 2014 is the rectangle form recess for flexible piece 2011 bottom, and thread groove 2014 and the gomphosis of axle 1012 screw thread of propping.

Preferably, the square groove 202 includes a circular shaft 2021, an arc block 2022, a curved block 2023 and a curved groove 2024, the circular shaft 2021 is a circular shaft in which the convex portions at two sides of the square groove 202 are embedded, the convex portion of the circular shaft 2021 is embedded with the groove of the fitting groove 2012, the arc block 2022 is a convex block in which an arc is curved around the circular shaft 2021, the arc block 2022 is embedded with the groove of the arc groove 2013, the curved block 2023 is a square block in which the arc block 2022 is embedded and arranged in the groove around the circular shaft 2021 and extends in an arc, the curved groove 2024 is a groove in which the arc block 2022 is connected around the circular shaft 2021 and extends in an arc, the curved groove 2024 is embedded with the arc block 2022, when the arc block 2022 is completely embedded into the arc groove 2013, the arc block 2022 cannot extend further, so that the arc block 2022 can exert a force on itself to make the arc block 2022 generate a certain deflection on the peripheral surface of the circular shaft 2021, the arc block 2022 is deflected in the groove around the round shaft 2021 by the bending block 2023 at the bottom end of the arc block 2022, when the bending block 2023 is deflected, one end of the bending block 2023 is embedded into the bending groove 2024, and then the arc block 2023 is embedded into the bending groove 2024 in a circular arc bending manner, so that the connection of the arc block 2022 is more stable, and the arc block 2022 is not easily loosened when embedded into the arc groove 2023, so that when the main bodies 1 are spliced and combined together, not only the riveting between the main bodies 1 is performed, but also the light steel frameworks 2 inside the main bodies are connected to each other to a certain extent, when the main body 1 is damaged by external force, and the light steel frameworks 2012 inside the main bodies are not separated, so that the main bodies 1 are also kept connected to a certain extent and cannot be easily separated.

A light steel building wall prefabricating and mounting method comprises the following steps;

firstly, the size and the shape of a building to be installed are measured, and then the light steel framework 2 with the corresponding size is manufactured.

And secondly, wrapping the manufactured light steel framework 2 through the main body 1 and connecting the light steel framework together through rivets, so that a prefabricated wall body with a prefabricated shape and a prefabricated size is manufactured.

And thirdly, mounting the manufactured prefabricated light steel wall body 1 on the ground according to a specified position, and then enabling the prefabricated light steel wall body to be combined and mounted into a specified building by jointing and connecting a plurality of bodies 1 with each other.

In the third step, when the main body 1 and the other main body 1 are spliced and combined together, the convex block of the mosaic block 102 on one side of the main body 1 is mosaic into the mosaic groove 101 on one side of the other main body for mosaic, then the mosaic block 102 moves along the mosaic groove 101 by pushing the main body 1, so as to drive the rotating shaft 1021 on the mosaic block 102 to rotate, the mosaic block 201 on the light steel framework 2 extends out to be mosaic into the square groove 202 on the light steel framework 2 in the other main body 1 for connection, then when the mosaic block 201 is mosaic into the square groove 202, the arc block 2022 on the round shaft 2021 extends into the arc groove 2013 of the fitting groove 2012 for mosaic connection, so that the light steel frameworks 2 in the main body 1 are also connected with each other in a certain way when being spliced and combined together, and the connection can be realized by simple riveting and casting, the connection between the main bodies 1 is more stable, and the connection of the light steel framework 2 is prevented from being influenced when the main bodies 1 are damaged.

(IV) working principle

The invention provides a light steel building wall and a prefabrication and installation method thereof, firstly, a light steel framework 2 is wrapped and riveted through a main body 1, the light steel framework and the main body 1 are fixedly connected together to form a whole, then the main bodies 1 are spliced and combined together to form a preset building shape, so that the building is built, when the main bodies 1 are spliced and combined together, a mosaic block 102 and a mosaic groove 101 at two sides of the main body 1 are mutually embedded with a mosaic block 102 and a mosaic groove 101 on the other main body 1, when the mosaic block 102 is embedded into the mosaic groove 101 to be pushed, a rotating shaft 1021 on the mosaic block 102 is in threaded mosaic in an arc groove 1011 on the mosaic groove 101 to move, and the rotating shaft 1021 starts to rotate when the rotating shaft 1021 moves along the arc groove 1011 through the threaded mosaic of the two, when the rotation shaft 1021 rotates, the shaft 1012 on both sides of the arc groove 1011 will be driven to rotate, when the shaft 1012 rotates, the protruded part on the top will be screwed into the screw groove 2014 at the bottom of the fitting block 201 on the light steel framework 2, so that when the shaft 1012 rotates, the fitting block 201 in the fitting groove 101 on the other main body 1 will be driven to extend from the light steel framework 2, when the fitting block 201 extends from the light steel framework 2, the fitting block 201 will be fitted into the square groove 202 on the light steel framework 2 in the groove between the fitting blocks 102, and because the width of the square groove 202 is larger than that of the fitting block 201, the fitting block 201 will still push the main body 1 to fit the fitting block 102 into the square groove 101 when the fitting block 201 is completely fitted into the square groove 202, and when the fitting block 201 is completely fitted into the square groove 202, the fitting groove 2012 on one side of the fitting block 201 will be fitted with the protruded part of the round shaft 2021 in the square groove 202, meanwhile, when the fitting block 201 continues to extend into the square groove 202, the fitting groove 2012 rubs the circular shaft 2021 to rotate the circular shaft 2021, when the circular shaft 2021 rotates, the fitting groove 2012 just moves to the arc groove 2013 at one end of the fitting groove 2012, because the circular shaft 2021 rotates, one end of the surrounding arc block 2022 is fitted into the arc groove 2013, then the shaft 2021 rotates to push the arc block 2022 to continuously extend into the arc groove 2013, so that the arc block 2022 is completely fitted and extended into the arc groove 2013, and then the arc block 2022 is fitted with the arc groove 2013 in a curved shape, so that the arc block 2022 cannot be separated due to common pulling after the fitting, and finally when the arc block 2022 is completely fitted into the arc groove 2013, because the arc block 2022 cannot continue to extend, the arc block 2022 exerts force on itself, so that the arc block 2022 is deflected on the peripheral surface of the circular shaft 2021, the arc block 2022 is deflected in the groove around the round shaft 2021 by the bending block 2023 at the bottom end of the arc block 2022, when the bending block 2023 is deflected, one end of the bending block 2023 is embedded into the bending groove 2024, and then the arc block 2023 is embedded into the bending groove 2024 in a circular arc bending manner, so that the connection of the arc block 2022 is more stable, and the arc block 2022 is not easily loosened when embedded into the arc groove 2023, so that when the main bodies 1 are spliced and combined together, not only the riveting between the main bodies 1 is performed, but also the light steel frameworks 2 inside the main bodies are connected to each other to a certain extent, when the main body 1 is damaged by external force, and the light steel frameworks 2012 inside the main bodies are not separated, so that the main bodies 1 are also kept connected to a certain extent and cannot be easily separated.