A kind of external wall scaffolding for construction

Abstract

The present invention is applicable to the technical field of scaffolds, and provides an external wall scaffold for construction, including a support member and a support leg, and also includes a lifting member 1. When a worker stands on the support member, the support member squeezes the fixed member 1 through the support leg, and the fixed member 1 drives the lifting member 1 to move through the elastic member 2. The lifting member 1 drives the extrusion head to move through the connecting member 1, and the extrusion head squeezes the air bag to squeeze the gas into the exhaust pipe. The gas pushes the lifting component to slide, so that the reinforcement component extends out of the fixed member 1, and the reinforcement component achieves the purpose of reinforcement by inserting into the soil; the gas pushes the sliding component to slide, and the sliding component drives the moving member 1 to move in the horizontal direction. The moving member 1 drives the rotating component to rotate so that the reinforcement member 2 extends out of the fixed member 2, and the reinforcement member 2 achieves the purpose of reinforcement by inserting into the soil. The present invention can reinforce the scaffold in different directions to ensure the stability of the scaffold when it is used.

Description

Technical Field

[0001] The invention belongs to the technical field of scaffolds, and in particular relates to an external wall scaffold for construction. Background Art

[0002] Scaffolding is a working platform set up to ensure the smooth progress of each construction process. It can be divided into external scaffolding and internal scaffolding according to the location of the scaffolding; it can be divided into wooden scaffolding, bamboo scaffolding and steel pipe scaffolding according to different materials.

[0003] Steel pipe scaffolding is commonly used in the prior art, but the ground conditions of the construction site of the building exterior wall are complicated, and there may be muddy ground, which affects the stability of the scaffolding, making the installed scaffolding have great safety hazards and easily causing the scaffolding to collapse when workers stand on it for construction. For this reason, we propose a construction exterior wall scaffolding. Summary of the invention

[0004] The object of the present invention is to provide an external wall scaffold for construction, aiming to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An external wall scaffold for construction, comprising a support member and symmetrically arranged support legs, and further comprising:

[0007] A lifting member 1, wherein the lifting member 1 is connected to a fixing member 1 through an elastic member 2, the fixing member 1 is movably connected to a supporting leg, a connecting member 1 is rotatably connected to the lifting member 1, an extrusion head is rotatably connected to the end of the connecting member 1, the extrusion head is slidably connected to a connecting seat, an air bag is provided between the extrusion head and the inner wall of the fixing member 1, an exhaust pipe is provided at the bottom of the air bag, the exhaust pipe is connected to a ventilation cavity 1 through a connecting pipe, a lifting assembly is slidably connected in the ventilation cavity 1, an elastic member 1 is provided between the lifting assembly and the ventilation cavity 1, an inclined groove is provided in the lifting assembly, and the inclined groove is slidably connected to the reinforcement assembly;

[0008] The second fixing member and the sliding assembly are slidably connected with the second ventilation chamber, the second ventilation chamber is connected with the exhaust pipe, the inclined wall of the sliding assembly is movably fitted with the inclined wall of the first moving member, the first moving member is movably abutted with the rotating assembly, the rotating assembly is rotatably connected with the second fixing member through the connecting shaft, and an elastic member three is provided between the rotating assembly and the inner wall of the second fixing member, and the end of the rotating assembly is fixedly connected with the second reinforcing member;

[0009] When the worker stands on the support, the support squeezes the fixed part 1 through the support leg, the fixed part 1 drives the lifting part 1 to move through the elastic part 2, the lifting part 1 drives the extrusion head to move through the connecting part 1, the extrusion head squeezes the gas inside the airbag to the exhaust pipe by squeezing the airbag, the gas pushes the lifting component to slide in the vertical direction, the lifting component is slidably connected with the reinforcement component through the inclined groove so that the reinforcement component extends out of the fixed part 1, and the reinforcement component achieves the purpose of reinforcement by inserting into the soil; the gas pushes the sliding component to slide in the vertical direction, the inclined wall of the sliding component drives the moving part 1 to move in the horizontal direction by movably fitting with the inclined wall of the moving part 1, the moving part 1 drives the rotating component to rotate so that the reinforcement component 2 extends out of the fixed part 2, and the reinforcement component 2 achieves the purpose of reinforcement by inserting into the soil.

[0010] Furthermore, the lifting assembly includes a sliding member 1 and a connecting member 2, wherein the sliding member 1 is slidably connected to the ventilation cavity 1, the sliding member 1 is fixedly connected to the connecting member 2, the connecting member 2 is fixedly connected to the lifting member 2, and the lifting member 2 is provided with symmetrically arranged inclined grooves.

[0011] Furthermore, the reinforcement component includes a symmetrically arranged moving part 2, a slider is fixedly connected to the moving part 2, the slider is slidably connected to the inclined groove, the moving part 2 is slidably connected to the slide seat, the slide seat is fixed in the fixed part 1, and a plurality of reinforcement parts 1 are fixedly connected to the moving part 2.

[0012] Furthermore, the sliding assembly includes a sliding member 2 and a lifting member 3, the sliding member 2 is slidably connected to the ventilation cavity 2, the ventilation cavity 2 is opened in the supporting leg, the sliding member 2 is fixedly connected to the lifting member 3, and a plurality of frustums are fixedly connected to the lifting member 3, and the inclined walls of the frustums are movably fitted with the inclined walls of the moving member 1.

[0013] Furthermore, the rotating assembly includes a rotating member and an abutment wheel, one end of the rotating member is rotatably connected to the abutment wheel, the abutment wheel is movably abutted with a movable member, the other end of the rotating member is fixedly connected to a reinforcing member two, the rotating member is rotatably connected to a fixed member two via a connecting shaft, and an elastic member three is provided between the rotating member and the inner wall of the fixed member two.

[0014] Furthermore, it also includes a material transfer structure, which is arranged on one side of the supporting leg and is used to transfer materials.

[0015] Furthermore, the material transmission structure includes a frame, a screw rod is rotatably connected in the frame, a driving member is provided at the input end of the screw rod, the driving member is fixed on a mounting seat, the mounting seat is fixedly connected to the inner wall of the frame, a placing member is threadedly connected to the screw rod, and the placing member is slidably connected to the frame.

[0016] Furthermore, two side walls of the frame are provided with movable grooves, the movable grooves are slidably connected to the guide members, and the guide members are fixedly connected to the placement members.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The exterior wall scaffolding for construction is provided with components such as an air bag, a lifting member 1 and a moving member 1. When a worker stands on the supporting member, the supporting member squeezes the fixed member 1 through the supporting legs, the fixed member 1 drives the lifting member 1 to move through the elastic member 2, the lifting member 1 drives the extrusion head to move through the connecting member 1, the extrusion head squeezes the gas inside the air bag to the exhaust pipe by squeezing the air bag, the gas pushes the lifting component to slide, the lifting component is connected to the reinforcement component by sliding through the inclined groove so that the reinforcement component extends out of the fixed member 1, and the reinforcement component is reinforced by inserting into the soil; the gas pushes the sliding component to slide, the sliding component drives the moving member 1 to move in the horizontal direction, the moving member 1 drives the rotating component to rotate so that the reinforcement component 2 extends out of the fixed member 2, and the reinforcement component is reinforced by inserting into the soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention.

[0020] Figure 2 It is a top view of the support leg in the present invention.

[0021] Figure 3 It is a three-dimensional structural schematic diagram of the connection relationship between the connector 1 and the extrusion head in the present invention.

[0022] Figure 4 It is a cross-sectional view of part of the supporting legs in the present invention.

[0023] Figure 5 For the present invention Figure 4 Schematic diagram of the enlarged structure of area A in the middle.

[0024] Figure 6 For the present invention Figure 4 Schematic diagram of the enlarged structure of area B in the middle.

[0025] Figure 7 It is a side structural schematic diagram of the material transfer structure in the present invention.

[0026] In the figure: support member 01, support leg 11, reinforcement member 12, airbag 13, fixed seat 14, connecting seat 15, connecting member 1 16, lifting member 1 17, extrusion head 18, fixing member 1 02, lifting assembly 20, lifting member 2 21, reinforcement member 1 22, elastic member 1 23, sliding member 1 24, ventilation cavity 1 25, connecting pipe 26, exhaust pipe 27, elastic member 2 28, sliding head 29, material transfer structure 30, driving member 31, frame 32, shift Movable groove 33, guide member 34, screw rod 35, placement member 36, mounting seat 37, fixed member 204, sliding assembly 40, sliding member 2 41, ventilation cavity 2 42, reinforcement member 2 43, rotating member 44, lifting member 3 45, connecting shaft 46, elastic member 3 47, abutment wheel 48, round table 49, rotating assembly 50, moving member 1 51, limiting groove 52, reinforcement assembly 60, connecting member 2 61, sliding seat 62, moving member 2 63, inclined groove 64. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0029] like Figure 1-7 As shown, an external wall scaffold for construction provided by an embodiment of the present invention includes a support member 01 and symmetrically arranged support legs 11, and also includes:

[0030] A lifting member 17, wherein the lifting member 17 is connected to a fixing member 02 through an elastic member 28, and the fixing member 02 is movably connected to a supporting leg 11. A connecting member 16 is rotatably connected to the lifting member 17, and an extrusion head 18 is rotatably connected to the end of the connecting member 16, and the extrusion head 18 is slidably connected to a connecting seat 15. An air bag 13 is provided between the extrusion head 18 and the inner wall of the fixing member 02, and an exhaust pipe 27 is provided at the bottom of the air bag 13, and the exhaust pipe 27 is connected to a ventilation cavity 25 through a connecting pipe 26. A lifting assembly 20 is slidably connected in the ventilation cavity 25, and an elastic member 23 is provided between the lifting assembly 20 and the ventilation cavity 25. An inclined groove 64 is provided in the lifting assembly 20, and the inclined groove 64 is slidably connected to the reinforcement assembly 60;

[0031] The fixed member 204 and the sliding assembly 40, the sliding assembly 40 is slidably connected with the ventilation cavity 204, the ventilation cavity 204 is connected with the exhaust pipe 27, the inclined wall of the sliding assembly 40 is movably fitted with the inclined wall of the moving member 1 51, the moving member 1 51 is movably abutted with the rotating assembly 50, the rotating assembly 50 is rotatably connected with the fixed member 204 through the connecting shaft 46, and an elastic member 3 47 is provided between the rotating assembly 50 and the inner wall of the fixed member 204, and the end of the rotating assembly 50 is fixedly connected with the reinforcing member 2 43;

[0032] When the worker stands on the support member 01, the support member 01 squeezes the fixed member 02 through the support leg 11, and the fixed member 02 drives the lifting member 17 to move through the elastic member 28, and the lifting member 17 drives the extrusion head 18 to move through the connecting member 16, and the extrusion head 18 squeezes the gas inside the airbag 13 to the exhaust pipe 27 by squeezing the airbag 13, and the gas pushes the lifting component 20 to slide in the vertical direction, and the lifting component 20 is slidably connected with the reinforcement component 60 through the inclined groove 64 so that the reinforcement component 60 extends out of the fixed member 02, and the reinforcement component 60 achieves the purpose of reinforcement by inserting into the soil; the gas pushes the sliding component 40 to slide in the vertical direction, and the inclined wall of the sliding component 40 drives the moving member 51 to move in the horizontal direction by movably fitting with the inclined wall of the moving member 51, and the moving member 51 drives the rotating component 50 to rotate so that the reinforcement member 2 43 extends out of the fixed member 04, and the reinforcement member 2 43 achieves the purpose of reinforcement by inserting into the soil.

[0033] In the embodiment of the present invention, the lifting member 17, the connecting member 16 and the supporting member 01 are all plates, the elastic member 23, the elastic member 28 and the elastic member 3 47 are all springs, the fixing member 02 and the fixing member 04 are all plug rods, the reinforcing member 2 43 is a barb, and the moving member 51 is a block; a cross-arranged reinforcing member 12 is provided between the two supporting legs 11; the airbag 13 is fixedly connected to the inner wall of the fixing member 02, and the airbag 13 is annular; the connecting seat 15 is fixed on the fixing seat 14, and the fixing seat 14 is fixed in the fixing member 02; the fixing member 2 04 is fixedly connected to the supporting leg 11; when the worker stands on the supporting member 01, the supporting member 01 applies pressure to the supporting leg 11, the supporting leg 11 squeezes the reinforcing member 12, and the earth gives a reaction force to the reinforcing member 12, so that the elastic Component 28 is compressed, and lifting component 17 moves. Lifting component 17 drives three connecting components 16 to rotate and move. The end of connecting component 16 drives extrusion head 18 to slide in the groove of connecting seat 15. Extrusion head 18 squeezes airbag 13, and squeezes the gas inside airbag 13 into exhaust pipe 27. Gas enters ventilation cavity 125 through connecting pipe 26, so that lifting assembly 20 moves downward, and then drives reinforcement assembly 60 to move in horizontal direction, so as to be inserted into soil. At the same time, gas enters ventilation cavity 242, so that sliding assembly 40 moves downward, and sliding assembly 40 drives moving component 51 to slide in limiting groove 52. Moving component 51 drives rotating assembly 50 to rotate, so that reinforcement component 2 43 is inserted into soil, so as to ensure the stability of scaffolding.

[0034] like Figure 4 and Figure 6 As shown, as a preferred embodiment of the present invention, the lifting component 20 includes a sliding member 24 and a connecting member 61, the sliding member 24 is slidably connected to the ventilation cavity 25, the sliding member 24 is fixedly connected to the connecting member 61, the connecting member 61 is fixedly connected with the lifting member 21, and the lifting member 21 is provided with symmetrically arranged inclined grooves 64.

[0035] In the embodiment of the present invention, preferably, the sliding member 24 is a block, the connecting member 61 is a rod, and the lifting member 21 is a plate. The gas enters the ventilation cavity 25 through the connecting pipe 26, so that the sliding member 24 moves downward in the ventilation cavity 25, and the sliding member 24 drives the lifting member 21 to move downward through the connecting member 61.

[0036] like Figure 4 and Figure 6 As shown, as a preferred embodiment of the present invention, the reinforcement component 60 includes a symmetrically arranged moving part 2 63, a slider 29 is fixedly connected to the moving part 63, the slider 29 is slidably connected to the inclined groove 64, the moving part 63 is slidably connected to the slide seat 62, the slide seat 62 is fixed in the fixed part 1 02, and a plurality of reinforcement parts 22 are fixedly connected to the moving part 2 63.

[0037] In the embodiment of the present invention, preferably, the moving member 2 63 is a rod, and the fixed member 102 is an insertion rod. The lifting member 21 drives the moving member 2 63 to slide in the slide seat 62 by means of a sliding connection with the slider 29 through the inclined groove 64, and the moving member 2 63 drives the reinforcement member 1 22 to move, so that the reinforcement member 1 22 extends out of the fixed member 102, and then the reinforcement member 1 22 is inserted into the soil.

[0038] like Figure 4 and Figure 5 As shown, as a preferred embodiment of the present invention, the sliding assembly 40 includes a sliding member 41 and a lifting member 45, the sliding member 41 is slidably connected to the ventilation cavity 42, the ventilation cavity 42 is opened in the supporting leg 11, the sliding member 41 is fixedly connected to the lifting member 45, and a plurality of round tables 49 are fixedly connected to the lifting member 45, and the inclined wall of the round table 49 is movably fitted with the inclined wall of the moving member 1 51.

[0039] In the embodiment of the present invention, preferably, the second sliding member 41 is a block, and the third lifting member 45 is a rod. Gas enters the second ventilation cavity 42, so that the second sliding member 41 moves downward in the second ventilation cavity 42, the second sliding member 41 drives the third lifting member 45 to move downward, the third lifting member 45 drives the round table 49 to move downward, and the inclined wall of the round table 49 drives the moving member 1 51 to slide in the limiting groove 52 by movably fitting with the inclined wall of the moving member 1 51.

[0040] like Figure 5 As shown, as a preferred embodiment of the present invention, the rotating assembly 50 includes a rotating member 44 and an abutment wheel 48, one end of the rotating member 44 is rotatably connected with the abutment wheel 48, the abutment wheel 48 is movably abutted with a moving member 51, the other end of the rotating member 44 is fixedly connected to a reinforcing member 43, the rotating member 44 is rotatably connected to a fixed member 204 through a connecting shaft 46, and an elastic member 3 47 is provided between the rotating member 44 and the inner wall of the fixed member 204.

[0041] In the embodiment of the present invention, preferably, the rotating member 44 is a plate. The moving member 1 51 drives the rotating member 44 to rotate around the connecting shaft 46 by movably contacting with the contact wheel 48, and the rotating member 44 drives the reinforcing member 2 43 to rotate, so that the reinforcing member 2 43 is inserted into the soil.

[0042] like Figure 1 As shown, as a preferred embodiment of the present invention, it also includes a material transfer structure 30, and the material transfer structure 30 is arranged on one side of the supporting leg 11, and the material transfer structure 30 is used to transfer materials.

[0043] In the embodiment of the present invention, preferably, workers place the required materials on the material transfer structure 30 before construction, and the material transfer structure 30 transfers the materials to the construction site without the need for workers to carry them.

[0044] like Figure 1 and Figure 7 As shown, as a preferred embodiment of the present invention, the material transmission structure 30 includes a frame body 32, a screw rod 35 is rotatably connected inside the frame body 32, a driving member 31 is provided at the input end of the screw rod 35, the driving member 31 is fixed on a mounting seat 37, the mounting seat 37 is fixedly connected to the inner wall of the frame body 32, a placement member 36 is threadedly connected to the screw rod 35, and the placement member 36 is slidably connected to the frame body 32.

[0045] In the embodiment of the present invention, the placement member 36 is a plate, and the driving member 31 is a motor. The worker places the materials needed for construction on the placement member 36, and then climbs onto the scaffolding and starts the driving member 31, which drives the screw rod 35 to rotate, so that the placement member 36 slides upward in the frame 32, so that the placement member 36 moves the materials needed for construction to the top of the frame 32, and the worker can use the materials.

[0046] like Figure 1 and Figure 7 As shown, as a preferred embodiment of the present invention, movable grooves 33 are opened on the two side walls of the frame body 32, and the movable grooves 33 are slidably connected to the guide members 34, and the guide members 34 are fixedly connected to the placement members 36.

[0047] In the embodiment of the present invention, the guide member 34 is a block. When the placement member 36 slides in the frame 32, the placement member 36 drives the guide members 34 on both sides thereof to slide in the moving groove 33, thus playing a guiding role.

[0048] The working principle of the present invention is:

[0049] When a worker stands on the support member 01, the support member 01 applies pressure to the support leg 11, and the support leg 11 squeezes the reinforcement member 12. The earth gives a reaction force to the reinforcement member 12, so that the elastic member 28 is compressed, and the lifting member 17 drives the three connecting members 16 to rotate and move, so that the extrusion head 18 squeezes the air bag 13, and squeezes the gas inside the air bag 13 into the exhaust pipe 27. The gas enters the ventilation cavity 25 through the connecting pipe 26, so that the sliding member 24 moves downward, and the sliding member 24 passes through the connecting member The second 61 drives the lifting member 21 to move downward, the lifting member 21 drives the moving member 2 63 to slide, and the moving member 2 63 drives the reinforcement member 22 to move, so that the reinforcement member 22 extends out of the fixing member 02, and then the reinforcement member 22 is inserted into the soil; at the same time, the gas enters the ventilation cavity 2 42, so that the sliding member 2 41 moves downward, and the sliding member 2 41 drives the table 49 to move downward through the lifting member 3 45, and then drives the moving member 51 to slide, so that the rotating member 44 drives the reinforcement member 2 43 to rotate, so that the reinforcement member 2 43 is inserted into the soil.

[0050] The above are only preferred embodiments of the present invention. It should be pointed out that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention. These should also be regarded as the protection scope of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A construction external wall scaffold, comprising a support member and symmetrically arranged support legs, wherein a cross-arranged reinforcement member is arranged between the two support legs, characterized in that: Also includes: A lifting member 1, wherein the lifting member 1 is connected to a fixing member 1 through an elastic member 2, the fixing member 1 is movably connected to a supporting leg, a connecting member 1 is rotatably connected to the lifting member 1, an extrusion head is rotatably connected to the end of the connecting member 1, the extrusion head is slidably connected to a connecting seat, an air bag is provided between the extrusion head and the inner wall of the fixing member 1, an exhaust pipe is provided at the bottom of the air bag, the exhaust pipe is connected to a ventilation cavity 1 through a connecting pipe, a lifting assembly is slidably connected in the ventilation cavity 1, an elastic member 1 is provided between the lifting assembly and the ventilation cavity 1, an inclined groove is provided in the lifting assembly, and the inclined groove is slidably connected to the reinforcement assembly; The second fixing member and the sliding assembly are fixedly connected to the supporting leg, the sliding assembly is slidably connected to the second ventilation cavity, the second ventilation cavity is connected to the exhaust pipe, the inclined wall of the sliding assembly is movably fitted with the inclined wall of the first moving member, the first moving member is movably abutted against the rotating assembly, the rotating assembly is rotatably connected to the second fixing member through the connecting shaft, and an elastic member three is provided between the rotating assembly and the inner wall of the second fixing member, and the end of the rotating assembly is fixedly connected with the second reinforcing member; When a worker stands on the support, the support squeezes the fixed part 1 through the support legs, and the fixed part 1 drives the lifting part 1 to move through the elastic part 2, and the lifting part 1 drives the extrusion head to move through the connecting part 1, and the extrusion head squeezes the gas inside the airbag to the exhaust pipe by squeezing the airbag, and the gas pushes the lifting component to slide in the vertical direction, and the lifting component is connected to the reinforcement component by sliding through the inclined groove so that the reinforcement component extends out of the fixed part 1, and the reinforcement component achieves the purpose of reinforcement by inserting into the soil; the gas pushes the sliding component to slide in the vertical direction, and the inclined wall of the sliding component drives the moving part 1 to move in the horizontal direction by movably fitting with the inclined wall of the moving part 1, and the moving part 1 drives the rotating component to rotate so that the reinforcement component 2 extends out of the fixed part 2, and the reinforcement component 2 achieves the purpose of reinforcement by inserting into the soil; The lifting assembly comprises a sliding member 1 and a connecting member 2, wherein the sliding member 1 is slidably connected to the ventilation cavity 1, the sliding member 1 is fixedly connected to the connecting member 2, the connecting member 2 is fixedly connected to the lifting member 2, and the lifting member 2 is provided with symmetrically arranged inclined grooves; The reinforcement assembly includes a symmetrically arranged moving part 2, a slider is fixedly connected to the moving part 2, the slider is slidably connected to the inclined groove, the moving part 2 is slidably connected to the slide seat, the slide seat is fixed in the fixed part 1, and a plurality of reinforcement parts 1 are fixedly connected to the moving part 2; The sliding assembly includes a sliding member 2 and a lifting member 3, wherein the sliding member 2 is slidably connected to the ventilation cavity 2, the ventilation cavity 2 is provided in the supporting leg, the sliding member 2 is fixedly connected to the lifting member 3, a plurality of round tables are fixedly connected to the lifting member 3, and the inclined wall of the round table is movably fitted with the inclined wall of the moving member 1; The rotating assembly includes a rotating member and an abutment wheel. One end of the rotating member is rotatably connected to the abutment wheel. The abutment wheel is movably abutted with a moving member. The other end of the rotating member is fixedly connected to a reinforcing member. The rotating member is rotatably connected to the fixed member through a connecting shaft. An elastic member three is provided between the rotating member and the inner wall of the fixed member.

2. The exterior wall scaffolding for construction according to claim 1, characterized in that: It also includes a material transfer structure, which is arranged on one side of the supporting leg and is used to transfer materials.

3. The exterior wall scaffold for construction according to claim 2, characterized in that: The material transfer structure includes a frame, a screw rod is rotatably connected in the frame, a driving member is provided at the input end of the screw rod, the driving member is fixed on a mounting seat, the mounting seat is fixedly connected to the inner wall of the frame, a placing member is threadedly connected to the screw rod, and the placing member is slidably connected to the frame.

4. The exterior wall scaffold for construction according to claim 3, characterized in that: The two side walls of the frame are provided with moving grooves, the moving grooves are slidably connected with the guide members, and the guide members are fixedly connected with the placement members.

Images