CN109488159B

CN109488159B - Prefabricated window board

Info

Publication number: CN109488159B
Application number: CN201811606777.7A
Authority: CN
Inventors: 李小明; 刘于峰; 王亮; 王勇; 何跃
Original assignee: Zhejiang Dajingzhong Engineering Technology Co Ltd
Current assignee: Zhejiang Dajingzhong Engineering Technology Co Ltd
Priority date: 2018-12-27
Filing date: 2018-12-27
Publication date: 2020-03-24
Anticipated expiration: 2038-12-27
Also published as: CN109488159A

Abstract

The invention discloses a prefabricated window board, which relates to the technical field of building decoration, and adopts the technical scheme that: including the plate body that is used for butt window mesa, the safe edge that is used for butt wall body lateral wall, the safe edge is separable with the plate body, be equipped with the elasticity strip on the plate body, in the elasticity strip embedding safe edge, the elasticity of elasticity strip orders about the safe edge and removes to the direction at plate body middle part. A main elastic strip is embedded in the plate body, two ends of the main elastic strip extend out of the plate body, and two ends of the main elastic strip are used for penetrating into the wall bodies on two sides of the windowsill surface; the elasticity of main bullet strip orders about the plate body and removes to the window frame direction, the elasticity of main bullet strip is greater than the elasticity strip. The width of the plate body of the window board does not need to be accurately cut, so that the reworking and scrapping risks of the plate body are reduced, and the construction difficulty is greatly reduced; the combination of the main elastic strips and the elastic strips ensures that the window board has better construction quality; the outer surfaces of the board body and the protective edge can be kept flat, smooth and clean, and the prefabricated window board has a good decorative effect.

Description

Prefabricated window board

Technical Field

The invention relates to the technical field of building decoration, in particular to a prefabricated window board.

Background

The window board is a decorative board installed on the windowsill, the surface of the window board is generally laid on a horizontal plane, the window board covers the surface of original concrete and lime of the windowsill, and the window board can form a bright and clean decorative effect according to the material of the window board.

The current chinese utility model patent that the bulletin number is CN204436154U of granting discloses a decorate and use window board, mainly by the section bar, detain formula fastener groove, U type groove and brace rod are constituteed, the section bar is including making profile and back, section bar back mounted is on the windowsill, it is provided with two knot formula fastener grooves on being close to one side of windowsill mesa, and one side that is close to the windowsill lateral wall is provided with a U type groove, its face of modelling is smooth wave form face at the windowsill edge, and smooth connection to a horizontal surface, be equipped with the brace rod making between profile and the back. The window board can be divided into a board body horizontally attached to the window board and a protective edge attached to the side wall of a wall body, and the board body is generally abutted against a window frame through the side wall.

The above prior art solutions have the following drawbacks: the width of different windowsills often has great difference, and the windowsill board is when prefabricating, needs the width of cutting plate body to make its width with the windowsill correspond to when guaranteeing plate body and window frame butt, the safe edge just in time with wall body lateral wall butt. The plate body can be cut only by taking down the plate body from the windowsill, so that the size of the cut plate body is difficult to be in place in one step, repeated cutting is needed if the width of the plate body is too long, and the windowsill plate is reported to be abandoned if the width of the plate body is too short; the window board has the defect of difficult construction.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the prefabricated window board, which has the advantages that the width of the board body does not need to be accurately cut, and the construction difficulty is low.

The technical purpose of the invention is realized by the following technical scheme: the utility model provides a prefabricated window board, is including the plate body that is used for butt window mesa, the safe edge that is used for butt wall body lateral wall, the safe edge is separable with the plate body, be equipped with the elasticity strip on the plate body, in the elasticity strip embedding safe edge, the elasticity of elasticity strip orders about the safe edge and removes to the direction at plate body middle part.

Through the technical scheme, during construction, the personnel smear cement on the window table board and the wall for installing the protective edge in advance. During construction, a person installs the plate body on the window table board, and the elastic force of the elastic strip drives the protective edge to abut against the wall. The elastic force of the elastic strip acts on the protective edge, so that the protective edge can move with the plate body in a self-adaptive manner, and the protective edge can be positioned at an accurate position close to the wall; therefore, the width of the board body of the window board is not required to be accurately cut, the reworking and scrapping risks of the board body are reduced, and the construction difficulty is greatly reduced.

Preferably, a main elastic strip is embedded in the plate body, two ends of the main elastic strip extend out of the plate body, and two ends of the main elastic strip are used for penetrating into the wall bodies on two sides of the windowsill surface; the elasticity of main bullet strip orders about the plate body and removes to the window frame direction, the elasticity of main bullet strip is greater than the elasticity strip.

Through the technical scheme, the personnel drill the walls on the two sides of the window table in advance, and during construction, the personnel penetrate the two ends of the main elastic strip into the two holes; personnel can be through the selection to the trompil position, make the plate body install the back on the window mesa, and the crooked elasticity that produces of main bullet strip, the elasticity of main bullet strip orders about the plate body and supports tightly on the window frame. Because the elasticity of the main elastic strip is greater than that of the elastic strip, the elasticity of the elastic strip is not neutralized with the main elastic strip, and the protective edge has supporting force with the wall, the plate body and the window frame; even if the cement is shrunk or expanded in the drying process or the cement of the window board is disturbed by vibration in the drying process, gaps are not easy to generate between the protective edge and the wall, between the plate body and the window frame, and the construction quality of the window board is better.

Preferably, both ends of the elastic strip are fixed on the main elastic strip.

Through the technical scheme, the elastic strip is fixed on the main elastic strip, so that a groove for embedding the elastic strip is not required to be formed in the plate body, and the prefabrication difficulty of the plate body is reduced.

Preferably, a first groove for embedding the main elastic strip is formed in the plate surface of the plate body facing the edge protector, and the first groove penetrates through the plate body in the direction of the edge protector; the wall surface of the protective edge facing the plate body is provided with a second groove for embedding the elastic strip, and the second groove penetrates through the protective edge towards the plate body.

Through the technical scheme, the main elastic strip can be conveniently disassembled and assembled with the plate body in a sliding mode as the first groove penetrates through the plate body towards the edge protection direction; because the second groove runs through the safe edge to the plate body direction, the elastic strip can conveniently realize the dismouting with the safe edge through the mode of sliding. The window board can be assembled in a mode that all parts are stacked in sequence, and is simple and convenient.

Preferably, main bullet strip is fixed through setting up the connecting piece between the two with the elasticity strip, the connecting piece is established including the cover and is fixed in the outer adjusting collar of main bullet strip, is established the butt cover that is fixed in the elasticity strip tip, will adjust the connecting plate that cover and butt cover connection are fixed, the connecting piece is still including adjusting the structure, adjusting collar and main bullet strip realize fastening or not hard up through adjusting the structure.

Through the technical scheme, the main elastic strip and the elastic strip are fixed through the connecting piece arranged between the main elastic strip and the elastic strip, the outer walls of the main elastic strip and the elastic strip can be kept flat and can also be used, the length of the raw materials can be cut when the main elastic strip and the elastic strip are prefabricated, and the main elastic strip and the elastic strip are prefabricated more conveniently; and the main elastic strip, the elastic strip and the connecting piece are also easy to disassemble and assemble. When installing the elasticity strip on main bullet strip, personnel can change the position that the adjusting collar is fixed in main bullet strip through adjusting the structure to change the interval of two connecting pieces, can adjust the elasticity that the elasticity strip predetermines through this method.

Preferably, the adjusting structure comprises a threaded rod fixed on the abutting sleeve and an adjusting rod in threaded connection with the threaded rod, the threaded rod faces the adjusting sleeve, and the adjusting rod abuts against the outer wall of the adjusting sleeve through the end part; the adjusting sleeve is made of elastic material.

Through the technical scheme, when a person rotates the adjusting rod, the adjusting rod moves towards the direction close to or far away from the adjusting sleeve through the threaded connection effect. When the adjusting rod is far away from the adjusting sleeve, the adjusting sleeve can slide along the length direction of the main elastic strip, and at the moment, the connecting piece can be conveniently disassembled and assembled or the elasticity of the elastic strip can be adjusted. When the adjusting rod abuts against the adjusting sleeve, the wall surface of the adjusting sleeve is driven by the adjusting rod to deform towards the inside of the adjusting sleeve, so that the effect of clamping the main elastic strip is achieved; after the adjusting rod is screwed towards the direction of the adjusting sleeve, a larger static friction force is generated between the adjusting sleeve and the main elastic strip, and the adjusting sleeve and the main elastic strip are in a relatively fixed state at the moment.

Preferably, the adjusting rod comprises a regular hexagon screwing head, and a plurality of driving holes for the rod piece to penetrate through are distributed on the screwing head along the circumferential direction.

Through the technical scheme, personnel can drive the adjusting rod to rotate by rotating the twisting head by hands or a wrench, so that the position of the adjusting rod is changed. Because the twisting head is partially shielded by the connecting plate, the person can take more effort to screw the twisting head, and the driving hole can facilitate the person to penetrate the rod piece to drive the twisting head to screw, so that the twisting head is convenient.

Preferably, the inner wall of adjusting collar is equipped with anti-skidding line, anti-skidding line is located the face contralateral that adjusting collar is used for the butt regulation pole.

Through the technical scheme, after the adjusting rod is screwed towards the direction of the adjusting sleeve, a larger static friction force is generated between the adjusting sleeve and the main elastic strip, and the adjusting sleeve and the main elastic strip are in a relatively fixed state at the moment. The anti-skidding line that sets up has further improved the frictional force between adjusting collar and main bullet strip, and the adjusting collar is difficult for skidding on main bullet strip.

Preferably, be equipped with T type piece on the plate body, be equipped with on the safe edge and supply the gliding T type groove of T type piece embedding, sliding connection is established through T type piece and T type groove to plate body and safe edge, and the elasticity direction of its slip direction along the elastic strip.

Through the technical scheme, the plate body and the protective edge are in sliding connection with the T-shaped groove through the T-shaped block, the plate body and the protective edge can keep accurate positions which are attached to each other, and a gap between the plate body and the protective edge can be controlled to be small.

Preferably, a space is reserved between the T-shaped block and the side wall of the plate body, the protective edge is penetrated by one end of the T-shaped groove in the direction of the middle of the plate body, and the protective edge is not penetrated by the other end of the T-shaped groove.

Through above-mentioned technical scheme, after safe edge and plate body installation, T type piece and T type groove do not all expose, and T type piece and T type groove can not cause the influence to the decorative effect of this window board.

In summary, compared with the prior art, the beneficial effects of the invention are as follows:

1. the width of the board body of the window board does not need to be accurately cut, so that the construction difficulty is greatly reduced;

2. the combination of the main elastic strips and the elastic strips ensures that the window board has better construction quality;

3. the outer surfaces of the board body and the protective edge can be kept flat, smooth and clean, and the prefabricated window board has a good decorative effect.

Drawings

FIG. 1 is a schematic illustration of an embodiment of a prefabricated window sill installation;

FIG. 2 is an exploded view of a prefabricated window sill of an embodiment;

FIG. 3 is a completed assembled prefabricated window sill according to an exemplary embodiment;

FIG. 4 is a partial view of the present prefabricated window sill, primarily highlighting the configuration of the connectors;

fig. 5 is a structural view of the connecting member of the embodiment, mainly highlighting the structure of the anti-slip pattern and the adjusting lever.

In the figure, 1, a plate body; 2. protecting edges; 11. a T-shaped block; 21. a T-shaped groove; 12. a first groove; 3. a main elastic strip; 121. a first abutting block; 22. a second groove; 4. an elastic strip; 5. a connecting member; 221. a second abutting block; 51. an adjusting sleeve; 52. a butting sleeve; 53. a connecting plate; 6. an adjustment structure; 61. a threaded rod; 62. adjusting a rod; 621. screwing the head; 622. a drive aperture; 511. and (4) anti-skid lines.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the prefabricated window board disclosed by the invention comprises a board body 1 used for abutting against a window table top and a protective edge 2 used for abutting against a side wall of a wall body; the plate body 1 and the protecting edge 2 are rectangular, wherein the protecting edge 2 is located on the lower plate surface of the plate body 1 and close to the side wall of the plate body 1, and the side wall of the plate body 1, far away from the protecting edge 2, is used for abutting against a window frame.

Referring to fig. 2 and 3, the protective edge 2 is separable from the plate body 1, two T-shaped blocks 11 are fixed on the lower plate surface of the plate body 1 through bolts, a T-shaped groove 21 for the two T-shaped blocks 11 to be embedded and slide is formed in the protective edge 2, the plate body 1 and the protective edge 2 are in sliding connection with the T-shaped groove 21 through the T-shaped blocks 11, and the sliding direction of the protective edge 2 is along the width direction of the plate body 1, namely the direction of the protective edge 2 facing the center of the plate body 1. A space is reserved between the T-shaped block 11 and the side wall of the plate body 1, one end of the T-shaped groove 21 penetrates through the protective edge 2 towards the middle of the plate body 1, and the other end of the T-shaped groove 21 does not penetrate through the protective edge 2. Set up like this, the mode that safe edge 2 can slide through along the horizontal direction realizes the dismouting with plate body 1, and after safe edge 2 and the installation of plate body 1 were accomplished, T type piece and T type groove 21 all do not expose, and T type piece and T type groove 21 can not lead to the fact the influence to the decorative effect of this window board.

The plate body 1 is provided with a first groove 12 on the surface facing the protective edge 2, the first groove 12 is biased to a position close to the protective edge 2, the first groove 12 penetrates through the plate body 1 in the direction of the protective edge 2, and the first groove 12 is communicated with the side walls at two ends of the length of the plate body 1. A main elastic strip 3 is embedded in the first groove 12, two ends of the main elastic strip 3 respectively extend out of the plate body 1 from two opposite side walls of the plate body 1, and two ends of the main elastic strip 3 are used for penetrating into wall bodies on two sides of a windowsill surface; the length of main bullet strip 3 is greater than the length of window mesa, and main bullet strip 3 is the crook after the installation. The first groove 12 is preset with larger size, and the main elastic strip 3 can be bent and deformed in the first groove 12; the first groove 12 is internally provided with a first abutting block 121 for abutting the main elastic strip 3, the first abutting block 121 is located in the direction of the main elastic strip 3 towards the center of the plate body 1, and the first abutting block 121 and the plate body 1 are integrally formed. The first abutting block 121 is used for transmitting the elastic force of the main elastic strip 3 to the plate body 1, and the elastic force of the main elastic strip 3 drives the plate body 1 to move towards the window frame.

The plate surface of the protective edge 2 facing the plate body 1 is provided with a second groove 22, the second groove 22 is offset to a position close to the center of the plate body 1, the second groove 22 penetrates through the protective edge 2 towards the plate body 1, and the second groove 22 is communicated with the side wall of the protective edge 2 facing the center of the plate body 1. The embedded elastic strip 4 that is equipped with in second groove 22, elastic strip 4 and main bullet strip 3 have the coincidence region on vertical direction, and main bullet strip 3 is fixed through setting up at connecting piece 5 between the two with elastic strip 4. The length of elastic strip 4 is shorter than main bullet strip 3, and main bullet strip 3 is the bending form after the installation, and the elasticity of elastic strip 4 is less than main bullet strip 3. The second groove 22 is preset with larger size, and the elastic strip 4 can be bent and deformed in the second groove 22; the second groove 22 is provided with a second abutting block 221 for abutting the elastic strip 4, the second abutting block 221 is located in the direction of the elastic strip 4 towards the center of the plate body 1, and the second abutting block 221 is integrally fixed with the plate body 1. The second abutting block 221 is used for transmitting the elastic force of the elastic strip 4 to the protective edge 2, and the elastic force of the elastic strip 4 drives the protective edge 2 to move towards the center of the plate body 1. The main elastic strip 3 and the elastic strip 4 are both made of plastics.

Referring to fig. 4 and 5, the connecting member 5 includes an adjusting sleeve 51 fixed to the outside of the main elastic strip 3, an abutting sleeve 52 fixed to the end of the elastic strip 4, and a connecting plate 53 connecting and fixing the adjusting sleeve 51 and the abutting sleeve 52. The adjusting sleeve 51 is a rectangular sleeve, the adjusting sleeve 51 is made of a metal sheet, the adjusting sleeve 51 can be elastically deformed under the condition of being pressed, and the adjusting sleeve 51 can slide along the length direction of the main elastic strip 3. The abutment sleeve 52 is also a cuboid sleeve, but the end of the abutment sleeve 52 facing away from the elastic strip 4 is closed, the two abutment sleeves 52 bending the elastic strip 4 by sandwiching the two ends of the elastic strip 4.

The connecting piece 5 further comprises an adjusting structure 6, and the adjusting structure 6 is used for fixing the relative position between the adjusting sleeve 51 and the main elastic strip 3. The adjusting structure 6 comprises a threaded rod 61 fixed on the abutting sleeve 52 and an adjusting rod 62 in threaded connection with the threaded rod 61, the threaded rod 61 faces the adjusting sleeve 51, and the end part of the adjusting rod 62 abuts against the outer wall of the adjusting sleeve 51. The connecting plates 53 of each connecting piece 5 are two in number, the connecting plates 53 are respectively fixed on two opposite side walls of the adjusting sleeve 51 and the abutting sleeve 52, and the threaded rod 61 and the adjusting rod 62 are positioned between the two connecting plates 53. The two adjusting rods 62 comprise regular hexagonal screw heads 621, the screw heads 621 are coaxially fixed with the adjusting rods 62, and a plurality of driving holes 622 for the rod members to penetrate through are circumferentially distributed on the screw heads 621. The inner wall of the adjusting sleeve 51 is provided with anti-skid grains 511, the anti-skid grains 511 are positioned on the opposite side of the adjusting sleeve 51 used for abutting against the plate surface of the adjusting rod 62, the length direction of the anti-skid grains 511 is vertical to the length direction of the main elastic strip 3, and the anti-skid grains 511 are zigzag.

The person can rotate the adjusting rod 62 by rotating the screw head 621 by hand, and the adjusting rod 62 moves toward or away from the adjusting sleeve 51 by the screw connection. When the adjusting rod 62 is far away from the adjusting sleeve 51, the adjusting sleeve 51 can slide along the length direction of the main elastic strip 3. When the adjusting rod 62 abuts against the adjusting sleeve 51, the adjusting rod 62 drives the wall surface of the adjusting sleeve 51 to deform towards the inside of the adjusting sleeve 51, so that the effect of clamping the main elastic strip 3 is achieved; a person can use a thin rod as a tool to pass through the drive hole 622 to drive the adjustment rod 62 to be screwed further. After the adjusting rod 62 is screwed in the direction of the adjusting sleeve 51, a large static friction force is generated between the adjusting sleeve 51 and the main elastic strip 3, and at this time, the adjusting sleeve 51 and the main elastic strip 3 are in a relatively fixed state. The friction between the adjusting sleeve 51 and the main elastic strip 3 is further improved by the arranged anti-skid lines 511, and the adjusting sleeve 51 is not easy to slip on the main elastic strip 3. Through connecting piece 5, the dismouting can be conveniently realized to main bullet strip 3 and the elastic strip 4 of this window board. When installing elastic strip 4 on main bullet strip 3, personnel can be through the mode of adjusting the distance between two connecting pieces 5 to adjust the elasticity that elastic strip 4 predetermines.

The construction method of the prefabricated window board comprises the following steps: the personnel drills holes in advance on the walls on the two sides of the window table top and smears cement on the wall on the window table top and used for installing the protective edge 2 in advance. During construction, a person penetrates two ends of the main elastic strip 3 into holes formed in a wall; personnel can make and place plate body 1 on main bullet strip 3 and with the first groove 12 back of main bullet strip 3 embedding through the selection to the trompil position, the crooked elasticity that produces of main bullet strip 3, and the elasticity of main bullet strip 3 orders about plate body 1 and supports tightly on the window frame. Then the personnel get safe edge 2, imbed in second groove 22 with elastic strip 4, catch on elastic strip 4 with butt block two 221 simultaneously and outwards pull safe edge 2, then through T type piece 11, the cooperation of T type groove 21 with safe edge 2 sliding connection under plate body 1. After the person loosens the protective edge 2, the elastic force of the elastic strip 4 drives the protective edge 2 to abut against the wall.

Because the elasticity of the elastic strip 4 acts on the protective edge 2, the protective edge 2 can move with the plate body 1 in a self-adaptive manner, and the protective edge 2 can be positioned at the accurate position clinging to the wall; therefore, the width of the board body 1 of the window board is not required to be accurately cut, the reworking and scrapping risks of the board body 1 are reduced, and the construction difficulty is greatly reduced. On the basis, personnel can enable the preset elasticity of the elastic strip 4 to be in a proper range by adjusting the distance between the two connecting pieces 5, so that the protective edge 2 and the wall, the plate body 1 and the window frame have abutting force; even if the cement is shrunk or expanded in the drying process or the cement of the window board is disturbed by vibration in the drying process, gaps are not easily generated between the protective edge 2 and the wall, between the board body 1 and the window frame, and the construction quality of the window board is better.

The plate body 1 of the prefabricated window board can be prefabricated only by slotting on a common window board, the number of the first slots 12 is single, the T-shaped blocks 11 are simple and convenient to install, the requirement of the plate body 1 on raw materials is low, the prefabrication processing of the plate body 1 is simple and convenient, and the application range of the prefabricated window board is wide. On this basis, the work progress of this prefabricated window board is also comparatively simple, and the hole on the wall is covered to the plate body 1 of accomplishing of installation, and each piece of elasticity strip 4, main bullet strip 3, each groove all do not expose, then the surface of plate body 1, safe edge 2 can keep level and smooth bright and clean, and this prefabricated window board has better decorative effect.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a prefabricated window board, includes plate body (1) that is used for butt windowsill face, safe edge (2) that are used for butt wall body lateral wall, characterized by: the protective edge (2) is separable from the plate body (1), an elastic strip (4) is arranged on the plate body (1), the elastic strip (4) is embedded into the protective edge (2), and the elastic force of the elastic strip (4) drives the protective edge (2) to move towards the middle of the plate body (1);

a main elastic strip (3) is embedded in the plate body (1), two ends of the main elastic strip (3) extend out of the plate body (1), and two ends of the main elastic strip (3) are used for penetrating into walls on two sides of a windowsill surface; the elastic force of the main elastic strip (3) drives the plate body (1) to move towards the window frame, and the elastic force of the main elastic strip (3) is larger than that of the elastic strip (4).

2. A prefabricated window sill as claimed in claim 1 wherein: the two ends of the elastic strip (4) are fixed on the main elastic strip (3).

3. A prefabricated window sill as claimed in claim 2, wherein: a first groove (12) for embedding the main elastic strip (3) is formed in the plate surface of the plate body (1) facing the protective edge (2), and the first groove (12) penetrates through the plate body (1) in the direction of the protective edge (2); the wall surface of the protective edge (2) facing the plate body (1) is provided with a second groove (22) for embedding the elastic strip (4), and the second groove (22) penetrates through the protective edge (2) towards the plate body (1).

4. A prefabricated window sill as claimed in claim 2, wherein: main bullet strip (3) are fixed through setting up connecting piece (5) between the two with elastic strip (4), connecting piece (5) are established adjusting sleeve (51), the cover that is fixed in main bullet strip (3) outer are fixed in including the cover, are established butt cover (52) that are fixed in elastic strip (4) tip, are connected fixed connecting plate (53) with adjusting sleeve (51) and butt cover (52), connecting piece (5) are still including adjusting structure (6), adjusting sleeve (51) and main bullet strip (3) realize fastening or not hard up through adjusting structure (6).

5. A prefabricated window sill as claimed in claim 4, wherein: the adjusting structure (6) comprises a threaded rod (61) fixed on the abutting sleeve (52) and an adjusting rod (62) in threaded connection with the threaded rod (61), the threaded rod (61) faces the adjusting sleeve (51), and the adjusting rod (62) abuts against the outer wall of the adjusting sleeve (51) through the end part; the adjusting sleeve (51) is made of elastic material.

6. A prefabricated window sill as claimed in claim 5, wherein: the adjusting rod (62) comprises a regular hexagon screwing head (621), and a plurality of driving holes (622) for the rod piece to penetrate through are distributed on the screwing head (621) along the circumferential direction.

7. A prefabricated window sill as claimed in claim 5, wherein: the inner wall of adjusting sleeve (51) is equipped with anti-skidding line (511), anti-skidding line (511) are located adjusting sleeve (51) and are used for the face contralateral of butt regulation pole (62).

8. A prefabricated window sill as claimed in claim 1 wherein: be equipped with T type piece (11) on plate body (1), be equipped with on safe edge (2) and supply the gliding T type groove (21) of T type piece (11) embedding, sliding connection is established through T type piece (11) and T type groove (21) to plate body (1) and safe edge (2), and the elasticity direction of elastic strip (4) is followed to its slip direction.

9. A prefabricated window sill as claimed in claim 8, wherein: the utility model discloses a plate structure, including plate body (1), curb guard (2) are run through to the direction at plate body (1) middle part to the one end in T type piece (11) and the lateral wall of plate body (1) leave the interval, curb guard (2) are not run through to the other end in T type groove (21).