Wall top plastering through frame

Abstract

The invention provides a wall top plastering through frame, and relates to the field of plastering construction. According to the wall top plastering through frame, two fixing side plates are located on the two sides of a wall top, and the fixing side plates are attached to the side faces of a wall body. The connecting positioning plate is transversely connected to the two fixing side plates and used for fixing the transverse distance between the two fixing side plates according to the thickness of the wall. The horizontal pushing spatula is transversely arranged on the two fixed side plates and can horizontally slide relative to the fixed side plates so as to push and push mortar to be flat. The height adjusting piece is vertically arranged between the connecting positioning plate and the top face of the wall top, and the vertical height of the height adjusting piece is adjustable so that the height distance between the horizontal pushing spatula and the top face of the wall top can be adjusted. The construction efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of plastering construction, and in particular to a wall top plastering scaffold. BACKGROUND

[0002] In building engineering, brick membrane is often used in the areas that need to be supported, such as basement foundation or pile cap, to replace wooden formwork or steel formwork. Brick membrane surface plastering is an essential process, and its core functions include two points: one is to protect the wall from wind and rain erosion and ensure the long-term stability of the wall structure; the other is to provide a smooth and solid working basis for subsequent waterproof layer or concrete pouring process. Taking a common specification (such as 24 thick brick membrane, wall height 1.2m, plastering thickness 10mm) as an example, the traditional plastering process is as follows: first, complete the brick wall masonry, and after the verticality, flatness and other parameters meet the design and specification requirements, evenly apply mortar on the wall surface from bottom to top, and finally plaster the wall top.

[0003] At present, wall top plastering still mainly relies on manual operation of trowel, and the specific operation steps include: setting a mortar cake (used to control the plastering thickness) on the wall top → pouring the mixed mortar on the wall top → manually operating the trowel to spread the mortar on the wall top → repeatedly trimming the wall top corner to achieve neat lines.

[0004] Manual wall top plastering has some obvious disadvantages: first, the wall thickness is reduced, and the limited space of the wall top leads to inconvenient operation and low construction efficiency. Second, the plastering thickness depends on the mortar cake mark, but the manual force is uneven, which easily causes local plastering to be too thick or insufficient, and the plastering flatness is difficult to control. Third, the corner treatment is difficult, and the trimming of the wall top corner requires high skill and time-consuming repeated operation, and it is difficult to avoid defects such as rough edges or asymmetry. SUMMARY

[0005] The present application aims at least to provide a wall top plastering scaffold to improve construction efficiency.

[0006] The following gives a brief summary of one or more aspects to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all contemplated aspects, and neither is it intended to identify key or critical elements of all aspects nor to delineate the scope of any or all aspects. Its only purpose is to give some concepts of one or more aspects in a simplified form as a prelude to the more detailed description given later.

[0007] One of the embodiments of the present application provides a wall top plastering scaffold, which comprises: Two fixed side plates are located on both sides of the wall top, and the fixed side plates are attached to the side surface of the wall.

[0008] The connecting positioning plate is transversely connected to the two fixed side plates, and is used for fixing the transverse distance between the two fixed side plates to adapt to the thickness of the wall.

[0009] The flat push trowel is transversely arranged on the two fixed side plates, and can slide horizontally relative to the fixed side plates to push and flatten the mortar.

[0010] The height adjusting member is vertically arranged between the connecting positioning plate and the top surface of the wall, and the vertical height of the height adjusting member is adjustable to adjust the height distance between the flat push trowel and the top surface of the wall.

[0011] In some embodiments, the two ends of the fixed side plate are provided with the connecting positioning plate.

[0012] In some embodiments, the connecting positioning plate comprises an L-shaped connecting seat fixed to the lower side of the two ends of the connecting positioning plate.

[0013] The two ends of the fixed side plate are provided with horizontally extending first through grooves for receiving the horizontal protruding segments of the L-shaped connecting seat, and the first through grooves on the two fixed side plates are symmetrically arranged to realize the connection between the connecting positioning plate and the fixed side plate.

[0014] In some embodiments, the two ends of the fixed side plate are provided with vertically extending second through grooves for receiving the horizontal protruding segments of the L-shaped connecting seat, and the second through grooves on the two fixed side plates are symmetrically arranged to realize the connection between the connecting positioning plate and the fixed side plate.

[0015] In some embodiments, the connecting positioning plate comprises an L-shaped connecting seat fixed to the lower side of the two ends of the connecting positioning plate, and the L-shaped connecting seat is rotatably connected to the fixed side plate, so that the connecting positioning plate can rotate in the vertical plane relative to the fixed side plate.

[0016] When the connecting positioning plate is rotated to the first position of the fixed side plate, the lower plate surface of the connecting positioning plate is parallel to the top surface of the wall and is fitted to the upper surface of the fixed side plate.

[0017] When the connecting positioning plate is rotated to the second position of the fixed side plate, the lower plate surface of the connecting positioning plate is perpendicular to the top surface of the wall and is fitted to the end surface of the fixed side plate.

[0018] In some embodiments, the two ends of the flat push trowel are provided with limiting portions on the lower side, the limiting portions of the two ends of the flat push trowel are engaged with the outer side of the two fixed side plates, and the lower blade surface of the flat push trowel is slidingly fitted to the upper surface of the fixed side plate.

[0019] In some embodiments, the upper side of the flat push trowel is provided with a handle for manually holding and operating the flat push trowel.

[0020] In some embodiments, the height adjusting member is detachably arranged at the middle part of the connecting positioning plate, so that the height adjusting member can be mounted or detached from the connecting positioning plate at the two ends of the fixed side plate during the plastering process.

[0021] In some embodiments, the height adjusting member comprises an adjusting bolt, which is threadedly connected with the connecting positioning plate, and the length of the screw rod of the adjusting bolt is greater than 20 mm.

[0022] In some embodiments, a level is embedded on the fixed side plate, which is used to monitor the levelness of the fixed side plate.

[0023] The wall top plastering frame relates to the technical field of wall top plastering, and is used for brick membrane wall top plastering construction. The fixed side plate can prevent mortar from falling to the two sides of the wall top, and can greatly add mortar. The fixed side plate can also limit the formation of flat corners, and the corners are formed at one time without repeated trimming, thereby improving the construction efficiency. The height adjusting member can help to accurately control the wall top plastering thickness. The flat trowel horizontally slides relative to the fixed side plate to push and flatten the mortar, so as to ensure the flatness of the wall top plastering and provide a good foundation condition for the next process construction, thereby ensuring the construction quality. BRIEF DESCRIPTION OF DRAWINGS

[0024] The above features and advantages of the present application can be better understood after reading the detailed description of the embodiments of the present application in combination with the following drawings. In the drawings, the components are not necessarily drawn to scale, and the components having similar related properties or features can have the same or similar reference numerals. Among them: Figure 1 is a structural schematic diagram of a wall top plastering frame according to some embodiments; Figure 2 is an exploded schematic diagram of a wall top plastering frame according to some embodiments; Figure 3 is an application schematic diagram of a wall top plastering frame according to some embodiments.

[0025] BRIEF DESCRIPTION OF DRAWINGS 1 - fixed side plate; 2 - flat trowel; 3 - first connecting positioning plate; 4 - handle; 5 - level; 6 - second connecting positioning plate; 7 - height adjusting member; 8 - frame end; 9 - brick membrane wall; 10 - frame front end; 11 - mortar layer; 12 - limiting part; 13 - part to be plastered; 14-L-shaped connecting seat; 15-first through slot. DETAILED DESCRIPTION

[0026] The present application will be described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the accompanying drawings and specific embodiments are merely exemplary and should not be understood as limiting the scope of protection of the present application.

[0027] It can be understood that the technical terms involved in the description of the present application, such as "middle", "transverse", "front", "rear", "vertical", "horizontal", "inner", "outer", "upper", "lower", etc. The orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments, and does not indicate or imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the application.

[0028] It should be noted that the terms "first", "second", etc. used herein to define features are merely for the convenience of distinguishing the corresponding features, and the above terms have no special meaning unless otherwise stated. As shown in the specification and claims, the terms "one", "a", "an", and / or "the" do not refer to a single number, but also include a plurality, unless the context clearly indicates otherwise. Generally, the terms "include" and "contain" only indicate the inclusion of the steps and elements clearly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements.

[0029] The embodiments of the present application provide a wall top plastering frame, which at least aims to provide a tool for wall top plastering construction to improve construction efficiency and ensure construction quality.

[0030] Figure 1 is a structural schematic view of a wall top plastering frame according to some embodiments.

[0031] As Figure 1 shown, the wall top plastering frame includes a fixed side plate 1, a connecting positioning plate, a flat push trowel 2, and a height adjusting member 7.

[0032] The number of fixed side plates 1 is two, and the two fixed side plates 1 are located on both sides of the wall top, i.e. the two fixed side plates 1 are located on both sides of the wall body, and the fixed side plates 1 are attached to the side surface of the wall body. In some embodiments, the two fixed side plates 1 are symmetrically arranged on both sides of the wall body. In some embodiments, the fixed side plate 1 is a thin plate structure, which is a long strip structure with a certain length, such as a rectangle, etc., extending along the side surface of the wall body. In some embodiments, the fixed side plate 1 is made of aluminum.

[0033] The connecting positioning plate is transversely connected to the two fixed side plates 1, and the transverse size of the connecting positioning plate is adapted to the thickness of the wall. The transverse direction (see Figure 1 ) in the present specification refers to the extension direction along the thickness of the wall. The connecting of the connecting positioning plate fixes the transverse distance between the two fixed side plates 1 to be equal to the thickness of the wall. In this way, the fixed side plates 1 can always be attached to the side surface of the wall in the use state of the wall plastering frame. In some embodiments, the connecting positioning plate is made of aluminum.

[0034] The flat push trowel 2 is transversely arranged on the two fixed side plates 1, and the lower blade surface of the flat push trowel 2 is attached to the upper surface of the fixed side plates 1. The flat push trowel 2 can slide horizontally relative to the fixed side plates 1, where the horizontal direction refers to the horizontal direction along the wall top surface. Under the transverse restriction of the two fixed side plates 1, the flat push trowel 2 is pushed forward on the wall top surface and pushes the mortar flat, thereby limiting the required long side corner of the wall. In some embodiments, the flat push trowel 2 is made of aluminum.

[0035] The height adjusting member 7 is vertically arranged between the connecting positioning plate and the wall top surface, and the vertical height of the height adjusting member 7 is adjustable to adjust the height distance between the flat push trowel 2 and the wall top surface. The vertical direction (see Figure 1 ) in the present specification refers to the direction perpendicular to the wall top surface. The height adjusting member 7 abuts against the wall top surface, and by adjusting the height of the height adjusting member 7 to X, the height adjusting member 7 can correspondingly lift the connecting positioning plate, so that when the lower plate surface of the connecting positioning plate is attached to the upper surface of the fixed side plates 1, the vertical height between the connecting positioning plate and the wall top surface is X, thereby making the upper surface of the fixed side plates 1 protrude from the vertical height X relative to the wall top surface. Under the vertical restriction of the two fixed side plates 1, the flat push trowel 2 is pushed forward on the wall top surface and pushes the mortar flat, thereby limiting the mortar layer that meets the plastering thickness requirement, wherein the plastering thickness requirement is X.

[0036] In some embodiments, the two end portions of the fixed side plates 1 are respectively provided with a connecting positioning plate, wherein the two end portions of the fixed side plates 1 refer to the two ends along the length direction of the fixed side plates 1. The connecting positioning plate includes a first connecting positioning plate 3 and a second connecting positioning plate 6. As Figure 1 shown, the first connecting positioning plate 3 and the second connecting positioning plate 6 are respectively arranged at the front end portion and the tail end portion of the fixed side plates 1. The two end portions of the connecting positioning plate (including the first connecting positioning plate 3 and the second connecting positioning plate 6) are respectively connected to the two fixed side plates 1 to limit the transverse distance between the two fixed side plates 1 to be adapted to the thickness of the wall. The two end portions of the connecting positioning plate refer to the two ends along the transverse direction.

[0037] Figure 2 is a disassembled schematic view of the wall plastering frame according to some embodiments.

[0038] In some embodiments, the connecting positioning plate comprises L-shaped connecting seats 14 fixed to the lower side of the two end portions of the connecting positioning plate. The first connecting positioning plate 3 and the second connecting positioning plate 6 are both fixed with L-shaped connecting seats 14. The L-shaped connecting seats 14 at the two end portions of the connecting positioning plate are located outside the two fixed side plates 1 and are symmetrically arranged. The L-shaped connecting seats 14 comprise vertical segments and transversely protruding segments.

[0039] The two end portions of the fixed side plate 1 are both provided with horizontally extending first through-slots 15, which are symmetrically arranged on the two fixed side plates 1. The first through-slots 15 are used for receiving the transversely protruding segments of the L-shaped connecting seats 14 and penetrate the end faces of the two end portions of the fixed side plate 1, so that the connecting positioning plate can move in the horizontal direction. The L-shaped connecting seats 14 can be simultaneously inserted into the first through-slots 15 of the two fixed side plates 1 from the end faces of the two fixed side plates 1, so as to realize the connection and fixation of the connecting positioning plate and the two fixed side plates 1. After the L-shaped connecting seats 14 are inserted into the horizontally arranged first through-slots 15, the lower plate surface of the connecting positioning plate is attached to the upper surface of the fixed side plate 1.

[0040] In some embodiments, on the basis of the horizontally extending first through-slots 15 arranged at the two end portions of the fixed side plate 1, the two end portions of the fixed side plate 1 are further provided with vertically extending second through-slots (not shown in the figure), which are symmetrically arranged on the two fixed side plates 1. The second through-slots are used for receiving the transversely protruding segments of the L-shaped connecting seats and penetrate the upper surface of the fixed side plate 1, so that the connecting positioning plate can move in the vertical direction. The L-shaped connecting seats 14 can be simultaneously inserted into the second through-slots of the two fixed side plates 1 from the upper surface of the two fixed side plates 1, so as to realize the connection and fixation of the connecting positioning plate and the two fixed side plates 1. After the L-shaped connecting seats 14 are inserted into the vertically arranged second through-slots, the lower plate surface of the connecting positioning plate is attached to the end face of the fixed side plate 1.

[0041] After the L-shaped connecting seats 14 are inserted into the horizontally arranged first through-slots 15, the lower plate surface of the connecting positioning plate is attached to the upper surface of the fixed side plate 1. At this time, the lower plate surface of the connecting positioning plate can be used to smooth the surface of the mortar layer of the wall top surface, and can also cooperate with the height adjusting member 7 to limit the vertical space conforming to the plastering thickness requirement. After the L-shaped connecting seats 14 are inserted into the vertically arranged second through-slots, the lower plate surface of the connecting positioning plate is attached to the end face of the fixed side plate 1. At this time, the lower plate surface of the connecting positioning plate can be used to limit the short side corner of the wall top surface conforming to the requirement. Meanwhile, the lower plate surface of the connecting positioning plate cooperates with the inner side surface of the fixed side plate to form a vertical inside corner, which is used to limit the vertical corner of the end side of the wall top surface conforming to the requirement.

[0042] The first connecting positioning plate 3 and the second connecting positioning plate 6 can be adjusted to different states according to the construction progress. For example, when it is required to level the top surface of the wall top, and when it is required to cooperate with the height adjusting member 7 to limit the vertical space that meets the troweling thickness requirement, at least one of the first connecting positioning plate 3 and the second connecting positioning plate 6 is inserted into the horizontally arranged first through slot 15. For another example, when it is required to level and shape the short side corners and vertical corners of the wall top, the first connecting positioning plate 3 or the second connecting positioning plate 6 at the corresponding end side is inserted into the vertically arranged second through slot.

[0043] In some embodiments, the connecting positioning plate comprises a first type of connecting seat, the first type of connecting seat extends in the vertical direction, and the first type of connecting seat is fixed to the lower side of the two end portions of the connecting positioning plate. The first connecting positioning plate 3 and the second connecting positioning plate 6 are both fixed with the first type of connecting seat. The first type of connecting seats at the two end portions of the connecting positioning plate are symmetrically arranged.

[0044] The first type of connecting seat at the two end portions of the connecting positioning plate can be located outside the two fixed side plates 1 or inside the two fixed side plates 1. The first type of connecting seat is rotatably connected with the fixed side plate 1, so that the connecting positioning plate can rotate in the vertical plane relative to the fixed side plate 1. When the connecting positioning plate is rotated to a first position of the fixed side plate 1, the connecting positioning plate is inserted into the horizontally arranged first through slot 15, the lower plate surface of the connecting positioning plate is parallel to the top surface of the wall top, and the lower plate surface of the connecting positioning plate is fitted with the upper surface of the fixed side plate 1. When the connecting positioning plate is rotated to a second position of the fixed side plate 1, the connecting positioning plate is inserted into the vertically arranged second through slot, the lower plate surface of the connecting positioning plate is fitted with the end surface of the fixed side plate 1, and the lower plate surface of the connecting positioning plate is perpendicular to the top surface of the wall top.

[0045] The two end portions of the flat trowel 2 are provided with limiting portions 12 on the lower side. The limiting portions 12 extend in the vertical direction. The two end portions of the connecting positioning plate refer to the two ends in the transverse direction. The limiting portions 12 at the two end portions of the flat trowel 2 can be located outside the two fixed side plates 1. The limiting portions 12 at the two end portions of the flat trowel 2 are clamped outside the two fixed side plates 1, and the lower blade surface of the flat trowel 2 is slidingly fitted with the upper surface of the fixed side plate 1. Due to the arrangement of the limiting portions 12, when the flat trowel 2 is manually pressed and pushed, the flat trowel 2 slides along the fixed side plate 1 in the horizontal direction to advance and level the mortar.

[0046] In some embodiments, a handle 4 is arranged on the upper portion of the flat trowel 2, and the handle 4 is used for manual holding and operating the flat trowel 2. In some embodiments, the handle 4 is made of rubber, which is beneficial for comfortable manual holding.

[0047] In some embodiments, the height adjusting member 7 is detachably arranged at the transverse middle portion of the connecting positioning plate. The detachable arrangement of the height adjusting member 7 enables the height adjusting member 7 to adapt to the installation or dismounting of the connecting positioning plate relative to the two end portions of the fixed side plate 1 during the troweling process.

[0048] Figure 3 is a schematic view of the application of the wall top plastering trolley according to some embodiments.

[0049] As an example only, as shown in Figure 3 the wall top plastering trolley is erected on the top of the brick formwork wall 9 (i.e. the wall top). The plastering work can start from the middle or either end of the wall top. When the plastering work starts from the middle of the wall top, the height adjustment member 7 of the first connecting positioning plate 3 at the front end 10 of the trolley and the height adjustment member 7 of the second connecting positioning plate 6 at the end 8 of the trolley are both set to the same height that is suitable for the plastering thickness. The mortar block is placed between the first connecting positioning plate 3 and the second connecting positioning plate 6, and the mortar is smoothed by operating the flat trowel 2.

[0050] When the wall top has been constructed to a certain level of the mortar layer 11, the height adjustment member 7 of the first connecting positioning plate 3 is disassembled to be flat on the mortar layer 11, and the height adjustment member 7 of the second connecting positioning plate 6 is kept at the height that is suitable for the plastering thickness and is in contact with the wall top surface of the part 13 to be plastered. The mortar block is continuously placed between the first connecting positioning plate 3 and the second connecting positioning plate 6, and the mortar is smoothed by operating the flat trowel 2.

[0051] When it is necessary to smooth and shape the short side corners and vertical corners of the wall top, the position of the connecting positioning plate (the first connecting positioning plate 3 or the second connecting positioning plate 6) is adjusted so that the lower plate surface of the connecting positioning plate is in contact with the end surface of the fixed side plate 1 and is perpendicular to the wall top surface. At this time, the height adjustment member 7 of the connecting positioning plate after the position adjustment is disassembled so that the lower plate surface of the connecting positioning plate can be used to limit the short side corners and vertical corners of the wall top that meet the requirements.

[0052] In some embodiments, the height adjustment member 7 includes an adjusting bolt that is threadedly connected with the connecting positioning plate. In order to make the height adjustment member 7 suitable for most of the requirements of the plastering thickness, for example, 8mm~12mm, the length of the screw rod of the adjusting bolt is greater than 20mm, and the adjusting stroke thereof can cover 8mm~12mm.

[0053] In some embodiments, a level is embedded on the fixed side plate 1, and the level is used to monitor the levelness of the fixed side plate 1. For example, the first connecting positioning plate 3 is flat on the completed mortar layer 11, and the height adjustment member 7 of the second connecting positioning plate 6 is kept at the height that is suitable for the plastering thickness, and the levelness of the fixed side plate 1 is monitored.

[0054] Having described the basic concepts, it is obvious that the above detailed disclosure is intended to be illustrative only and not restrictive of the scope of the present specification. Furthermore, the order of presentation of the elements and sequences in the specification is not intended to limit the order of the processes and methods presented in the specification. Although the above disclosure discusses some presently preferred embodiments of the application through various examples, it is understood that such details are merely for illustrative purposes and that the claims are not limited to the embodiments disclosed herein, but rather intended to cover all modifications and equivalent arrangements that are within the spirit and scope of the described embodiments.

Claims

1. A wall trowel carrier, characterized in that, The wall top plastering frame comprises: Two fixed side plates, which are located on both sides of the wall top and are attached to the side surface of the wall body; A connecting positioning plate, which is transversely connected to the two fixed side plates and is used to fix the transverse distance between the two fixed side plates according to the thickness of the wall body; A flat push trowel, which is transversely arranged on the two fixed side plates and can slide horizontally relative to the fixed side plates to push and flatten the mortar; A height adjusting member, which is vertically arranged between the connecting positioning plate and the wall top surface and has an adjustable vertical height to adjust the height distance between the flat push trowel and the wall top surface.

2. A wall trowel carrier according to claim 1, wherein, Both ends of the fixed side plate are provided with the connecting positioning plate.

3. A wall trowel carrier according to claim 2, wherein, The connecting positioning plate comprises an L-shaped connecting seat, which is fixed to the lower side of both ends of the connecting positioning plate. Both ends of the fixed side plate are provided with a horizontally extending first through groove, which is used to receive the transverse protruding segment of the L-shaped connecting seat, and the first through grooves on the two fixed side plates are symmetrically arranged to realize the connection between the connecting positioning plate and the fixed side plate.

4. A wall trowel carrier according to claim 3, wherein, Both ends of the fixed side plate are provided with a vertically extending second through groove, which is used to receive the transverse protruding segment of the L-shaped connecting seat, and the second through grooves on the two fixed side plates are symmetrically arranged to realize the connection between the connecting positioning plate and the fixed side plate.

5. The wall finishing scaffold frame of claim 1, wherein, The connecting positioning plate comprises an L-shaped connecting seat, which is fixed to the lower side of both ends of the connecting positioning plate, and the L-shaped connecting seat is rotatably connected with the fixed side plate, so that the connecting positioning plate can rotate relative to the fixed side plate in the vertical plane. When the connecting positioning plate is rotated to the first position of the fixed side plate, the lower plate surface of the connecting positioning plate is parallel to the wall top surface and is attached to the upper surface of the fixed side plate. When the connecting positioning plate is rotated to the second position of the fixed side plate, the lower plate surface of the connecting positioning plate is perpendicular to the wall top surface and is attached to the end surface of the fixed side plate.

6. The wall finishing scaffold frame of claim 1, wherein, Both ends of the flat push trowel are provided with limiting parts on the lower side, which are engaged with the outer side of the two fixed side plates, and the lower trowel surface of the flat push trowel is slidingly connected with the upper surface of the fixed side plate.

7. A wall trowel carrier according to claim 1 or 6, wherein, The upper side of the flat push trowel is provided with a handle, which is used to manually hold and operate the flat push trowel.

8. The top-bonding scaffold of claim 2, wherein The height adjusting member is detachably arranged in the middle part of the connecting positioning plate, so that the height adjusting member can be mounted or detached relative to the connecting positioning plate of both ends of the fixed side plate according to the plastering process.

9. A wall trowel carrier according to claim 1 or 8, wherein, The height adjusting member comprises an adjusting bolt, which is threadedly connected with the connecting positioning plate, and the screw rod length of the adjusting bolt is greater than 20 mm.

10. The top-bonding scaffold of claim 1, wherein A level is embedded on the fixed side plate, which is used to monitor the levelness of the fixed side plate.

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