Sand blasting device for building decoration construction
By designing a sandblasting device including a mobile base, a sand processing unit and a convenient use unit, the existing sandblasting device has been solved, and efficient and convenient sandblasting operations and good wall adhesion have been achieved. Combined effect.
Patent Information
- Application Number
- CN202421197373.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-05-29
AI Technical Summary
The existing sandblasting device for building decoration construction has problems such as simple nozzle structure, small sand covering area, low operating efficiency, insufficient stickiness of sand material, and difficulty in effectively bonding with the wall.
A sandblasting device including a mobile base, a sand processing unit and a convenient use unit is designed. The sand material processing unit makes the sand material into fine particles by stirring and crushing, and stirring with water to improve viscosity. The convenient use unit adopts a flat head nozzle and a winding roller structure, which expands the coverage width of the sandblasting area and has the functions of convenient storage and movement.
It achieves efficient and convenient sand blasting operations, expands the coverage area of sand material, improves the viscosity of sand material, ensures good adhesion of sand material to the wall, and improves construction efficiency and effect.
Smart Images

Figure CN222456706U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of building decoration construction, in particular to a sandblasting device for building decoration construction. Background Art
[0002] In construction projects, spraying the surface of building walls is a very common decorative process. By spraying a layer of fine sand, the wall surface can be flattened and the gaps between bricks can be effectively filled. The wall surface after spraying has a high flatness, which is convenient for subsequent tiling and other projects. In traditional technology, workers mostly use handheld tools to manually brush sand. With the development of mechanical technology, sandblasting machines have gradually replaced manual sandblasting operations.
[0003] In the prior art, the sandblasting devices used for building decoration construction mostly have simple round structures at the nozzle part, and the sand is mostly sprayed out in bundles, with a small coverage area and low operating efficiency. In addition, the prior devices lack effective treatment of the sand, and the sand and gravel raw materials are easy to stick together, resulting in insufficient mixing of the sand and water, resulting in insufficient viscosity of the sand, and the sand cannot be well bonded to the wall. Therefore, we propose a sandblasting device for building decoration construction. Utility Model Content
[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a sandblasting device for building decoration construction, which is convenient and efficient to use. The flat-head nozzle can spray viscous sand outward in a fan-shaped area, thereby expanding the coverage width of the sandblasting area. The pipe winding roller is used for winding the conveying hose, and the flat-head nozzle at the end can be horizontally clamped between the two clamping blocks, thereby realizing effective storage of the device and facilitating the subsequent movement of the device. The utility model also has a reliable sand processing unit, which can crush and decompose the agglomerated sand, thereby ensuring that the sprayed sand is all fine particles. A certain amount of water is added for stirring, which can improve the viscosity of the sand and ensure that the sand has a good bonding effect with the wall after being sprayed out, and can effectively solve the problems in the background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sandblasting device for building decoration construction, comprising a mobile base, a sand material processing unit and a convenient use unit;
[0006] Mobile base: a spherical roller is provided on the lower side, a mixing bin is fixedly connected to the upper side of the mobile base, and the upper end of the mixing bin is a frustum structure;
[0007] Sand processing unit: installed inside the mixing silo;
[0008] Convenient use unit: includes a folding rod frame, a tube winding roller, a feed hose, a clamping block, a flat-head nozzle and an air booster. Two symmetrically distributed folding rod frames are fixedly connected to the rear side of the mixing bin. The folding rod frame consists of a horizontal bar and an inclined bar, and a tube winding roller is fixedly connected to the lower end of the inclined bar on one side. The feed hose is led out from the lower side of the interior of the mixing bin and wound around the tube winding roller. Two upper and lower clamping blocks are fixedly connected to the outside of the mixing bin and adjacent to the tube winding roller. The flat-head nozzle is installed and fixed on the end of the feed hose, and the limit card is set between the two clamping blocks. An air booster is embedded and installed on the rear side of the mixing bin.
[0009] With the support of the bottom rollers, the mobile base can drive the entire device to move, so that it can be flexibly moved when spraying a large range of walls. The mixing bin is used for loading and processing sand. The sand processing unit breaks the sand into fine and uniform particles by stirring and crushing, which effectively addresses the problem of sand agglomeration, and can increase the viscosity of the sand by adding water and stirring. The stirred viscous sand falls into the bottom of the mixing bin and is sprayed outward under the pressure of the air compressor. The flat-head nozzle can make the viscous sand spray outward in a fan-shaped area, expanding the width of the sandblasting area. The operator holds the flat-head nozzle for sweeping, which can easily achieve efficient spraying of the wall. The pipe winding roller is used for winding the feed hose, and the flat-head nozzle at the end can be horizontally stuck between the two clamps, thereby achieving effective storage of the device and facilitating the subsequent movement of the device.
[0010] Furthermore, the convenient use unit also includes a push rod and a control switch. A push rod is fixedly connected between the left and right folding rod frames, and a control switch is installed on the outside of the push rod and close to the user's right hand. The push rod is used for the operator to hold the hand to facilitate the movement of the push device, and the control switch can facilitate the start and stop of the electrical device in the control device.
[0011] Furthermore, the sand processing unit includes a middle partition layer, a channel gate, a circular through hole, a hydraulic cylinder and a mounting support plate. The middle partition layer is fixedly connected at the middle height inside the mixing bin. The middle partition layer is a cylindrical structure as a whole, and a funnel-shaped structure is opened inside. A transverse inner slide groove is opened on the lower side of the funnel-shaped structure, and a channel gate is slidably connected in the inner slide groove. A circular through hole is opened on the left side of the channel gate, and the diameter of the circular through hole is the same as that of the vertical section of the funnel-shaped structure. A mounting support plate is fixedly connected to the outer side of the mixing bin, and a hydraulic cylinder is fixedly installed on the upper end of the mounting support plate. The telescopic end of the hydraulic cylinder passes through the side wall of the mixing bin and is fixedly connected to the right end of the channel gate. The middle partition is used to divide the interior of the mixing bin into an upper mixing area and a lower transfer area. The funnel shape inside the middle partition makes it easy for the mixed sand to leak downward. The hydraulic cylinder controls the lateral movement of the channel gate to control the opening and closing of the discharge channel. When the circular through hole on the left side of the channel gate corresponds vertically to the vertical section of the funnel-shaped structure, the discharge channel is opened. When the right half of the channel gate corresponds vertically to the vertical section of the funnel-shaped structure, the discharge channel is closed. At this time, the sand in the upper mixing area can be stirred and processed.
[0012] Furthermore, the sand material processing unit also includes a connecting rod, a mounting sleeve, a transmission shaft and a coupling. A mounting sleeve is installed at the center of the upper port of the mixing bin. The mounting sleeve is fixedly connected to the inner wall of the mixing bin through three connecting rods arranged in an outer circumferential array. The mounting sleeve is rotatably connected to the transmission shaft through an internal bearing, and the upper end of the transmission shaft is fixedly connected to the coupling. The connecting rod is used for installing the mounting sleeve, the mounting sleeve is used for installing the transmission shaft and keeping the horizontal height of the transmission shaft fixed, and the coupling is used for fixed connection between the transmission shaft and the output shaft of the motor.
[0013] Furthermore, the sand material processing unit also includes a stirring impeller, a motor and a crushing blade. The lower end of the transmission shaft is fixedly connected to the center of the stirring impeller. The four blades of the stirring impeller are arranged obliquely and a crushing blade with a triangular cross section is fixedly connected on the inclined surface. The motor is embedded in the inner part of the conical upper end of the mixing bin, and the output shaft of the motor faces downward and is fixedly connected to the transmission shaft through a coupling. The motor drives the stirring impeller on the lower side to rotate through the transmission shaft. The crushing blade fixedly connected to the inclined surface of the stirring impeller can crush and decompose the agglomerated sand material, thereby ensuring that the sprayed sand material is fine particles. Stirring with a certain amount of water can improve the viscosity of the sand material and ensure that the sand material has a good bonding effect with the wall after being sprayed out.
[0014] Furthermore, it also includes a movable door and a hand buckle groove. A square installation groove is provided at the conical upper end of the mixing bin and on the side away from the folding rod frame. The inside of the installation groove is movably connected to an outward-opening movable door through an axis, and a hand buckle groove is reserved on the upper side of the installation groove. The movable door is opened outward, and mixing materials such as sand and water can be added into the mixing bin. The hand buckle groove can facilitate the fingers to open the movable door.
[0015] Compared with the prior art, the beneficial effects of the utility model are: the sandblasting device for building decoration construction has the following advantages:
[0016] 1. This device is convenient and efficient to use: the flat-head nozzle can spray the sticky sand material outward in a fan-shaped area, which expands the coverage width of the sandblasting area. The operator can sweep the flat-head nozzle horizontally to conveniently achieve efficient spraying on the wall. The tube winding roller is used for winding the feeding hose. The flat-head nozzle at the end can be horizontally stuck between the two clamping blocks, thereby realizing the effective storage of the device and facilitating the subsequent movement of the device; the hand push rod is used for the operator's hand to hold, which is convenient for pushing the device to move, and the control switch can conveniently control the start and stop of the electrical device in the device;
[0017] 2. It has a reliable sand processing unit. The middle partition divides the interior of the mixing bin into an upper mixing area and a lower transfer area. The funnel shape inside the middle partition facilitates the mixed sand to leak downward. The hydraulic cylinder controls the lateral movement of the channel gate to control the opening and closing of the discharge channel. The motor drives the stirring impeller on the lower side to rotate through the transmission shaft. The crushing blade fixedly connected on the inclined surface of the stirring impeller can crush and decompose the agglomerated sand, thereby ensuring that the sprayed sand is fine particles. Mixing with a certain amount of water can improve the viscosity of the sand and ensure that the sand has a good bonding effect with the wall.
[0018] 3. The utility model is convenient and efficient to use. The flat-head nozzle can spray the sticky sand material outward in a fan-shaped area, which expands the coverage width of the sandblasting area. The tube winding roller is used for winding the feeding hose. The flat-head nozzle at the end can be horizontally clamped between the two clamping blocks, thereby realizing the effective storage of the device and facilitating the subsequent movement of the device. It also has a reliable sand processing unit, which can crush and decompose the agglomerated sand material, thereby ensuring that the sprayed sand material is fine particles. Stirring with a certain amount of water can improve the viscosity of the sand material and ensure that the sand material has a good bonding effect with the wall after being sprayed. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the structure of the utility model;
[0020] Figure 2 It is a schematic diagram of the local structure of the utility model;
[0021] Figure 3 This is a schematic diagram of the structure inside the mixing bin of the utility model;
[0022] Figure 4 It is a structural schematic diagram of the middle channel gate of the utility model.
[0023] In the figure: 1 mobile base, 2 mixing bin, 3 sand processing unit, 31 middle partition, 32 channel gate, 33 circular through hole, 34 hydraulic cylinder, 35 mounting bracket, 36 connecting rod, 37 mounting sleeve, 38 transmission shaft, 39 coupling, 310 stirring impeller, 311 motor, 312 crushing blade, 4 convenient use unit, 41 folding rod frame, 42 pipe winding roller, 43 feeding hose, 44 clamping block, 45 flat head nozzle, 46 air booster, 47 hand push rod, 48 control switch, 5 movable bin door, 6 hand buckle slot. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] See also Figure 1-Figure 4 , This embodiment provides a technical solution: a sandblasting device for building decoration construction, comprising a mobile base 1, a sand material processing unit 3 and a convenient use unit 4;
[0026] The mobile base 1: a spherical roller is provided on the lower side, and a mixing bin 2 is fixedly connected to the upper side of the mobile base 1, and the upper end of the mixing bin 2 is a frustum structure;
[0027] Sand material processing unit 3: installed inside the mixing bin 2;
[0028] Convenient use unit 4: includes a folding rod frame 41, a tube winding roller 42, a feed hose 43, a clamping block 44, a flat-head nozzle 45 and an air booster 46. Two folding rod frames 41 symmetrically distributed on the left and right are fixedly connected to the rear side of the mixing bin 2. The folding rod frame 41 is composed of a horizontal bar and an inclined bar, and the tube winding roller 42 is fixedly connected to the lower end of the inclined bar on one side. The feed hose 43 is led out from the lower side of the inside of the mixing bin 2 and is wound around the tube winding roller 42. Upper and lower clamping blocks 44 are fixedly connected to the outside of the mixing bin 2 and adjacent to the tube winding roller 42. The flat-head nozzle 45 is installed and fixed at the end of the feed hose 43, and the limit card is set between the two clamping blocks 44. An air booster 46 is embedded and installed on the rear side of the mixing bin 2.
[0029] The mobile base 1 can drive the entire device to move with the support of the bottom roller, so that it can be flexibly moved when spraying a large range of walls. The mixing bin 2 is used for filling and processing sand materials. The sand processing unit 3 crushes the sand materials into fine and uniform particles by stirring and crushing, which effectively addresses the problem of sand material agglomeration, and can increase the viscosity of the sand materials by adding water and stirring. The stirred viscous sand materials fall into the bottom of the mixing bin 2 and are sprayed outward under the pressurized action of the air booster 46. The flat-head nozzle 45 can make the viscous sand materials spray outward in a fan-shaped area, thereby expanding the width of the sandblasting area. The operator holds the flat-head nozzle 45 for sweeping, which can conveniently realize efficient spraying of the wall. The pipe winding roller 42 is used for winding the feed hose 43, and the flat-head nozzle 45 at the end can be horizontally clamped between the two clamping blocks 44, thereby realizing effective storage of the device and facilitating the subsequent movement of the device.
[0030] The convenient use unit 4 further includes a push rod 47 and a control switch 48. A push rod 47 is fixedly connected between the left and right folding rod frames 41. The control switch 48 is installed on the outer side of the push rod 47 and close to the user's right hand. The push rod 47 is used for the operator to hold the hand to facilitate the movement of the push device. The control switch 48 can facilitate the start and stop of the electrical device in the control device.
[0031] The sand processing unit 3 includes a middle partition layer 31, a channel gate 32, a circular through hole 33, a hydraulic cylinder 34 and a mounting support plate 35. The middle partition layer 31 is fixedly connected at the middle height inside the mixing bin 2. The middle partition layer 31 is a cylindrical structure as a whole, and a funnel-shaped structure is opened inside. A transverse inner slide groove is opened on the lower side of the funnel-shaped structure, and a channel gate 32 is slidably connected in the inner slide groove. A circular through hole 33 is opened on the left side of the channel gate 32, and the diameter of the circular through hole 33 is the same as that of the vertical section of the funnel-shaped structure. A mounting support plate 35 is fixedly connected to the outer side of the mixing bin 2, and a hydraulic cylinder 34 is fixedly installed on the upper end of the mounting support plate 35. The telescopic end of the hydraulic cylinder 34 passes through the side wall of the mixing bin 2 and is fixedly connected to the right end of the channel gate 32. The middle partition 31 is used to divide the interior of the mixing bin 2 into an upper mixing area and a lower transfer area. The funnel shape inside the middle partition 31 facilitates the mixed sand to leak downward. The hydraulic cylinder 34 controls the opening and closing of the discharge channel by controlling the channel gate 32 to move horizontally. When the circular through hole on the left side of the channel gate 32 corresponds vertically to the vertical section of the funnel-shaped structure, the discharge channel is opened. When the right half of the channel gate 32 corresponds vertically to the vertical section of the funnel-shaped structure, the discharge channel is closed. At this time, the sand in the upper mixing area can be stirred and processed.
[0032] The sand material processing unit 3 also includes a connecting rod 36, a mounting sleeve 37, a transmission shaft 38 and a coupling 39. A mounting sleeve 37 is installed at the center of the upper end of the mixing bin 2. The mounting sleeve 37 is fixedly connected to the inner wall of the mixing bin 2 through three connecting rods 36 arranged in an outer circumferential array. The mounting sleeve 37 is rotatably connected to the transmission shaft 38 through an internal bearing, and the upper end of the transmission shaft 38 is fixedly connected to the coupling 39. The connecting rod 36 is used for installing the mounting sleeve 37, the mounting sleeve 37 is used for installing the transmission shaft 38, and the horizontal height of the transmission shaft 38 is kept fixed, and the coupling 39 is used for the fixed connection between the transmission shaft 38 and the output shaft of the motor 311.
[0033] The sand material processing unit 3 also includes a stirring impeller 310, a motor 311 and a crushing blade 312. The lower end of the transmission shaft 38 is fixedly connected to the center of the stirring impeller 310. The four blades of the stirring impeller 310 are arranged obliquely and a crushing blade 312 with a triangular cross section is fixedly connected on the inclined surface. The motor 311 is embedded and installed inside the conical upper end of the mixing bin 2. The output shaft of the motor 311 faces downward and is fixedly connected to the transmission shaft 38 through a coupling 39. The motor 311 drives the stirring impeller 310 on the lower side to rotate through the transmission shaft 38. The crushing blade 312 fixedly connected to the inclined surface of the stirring impeller 310 can crush and decompose the agglomerated sand material, thereby ensuring that the sprayed sand material is fine particles. A certain amount of water is added for stirring, which can improve the viscosity of the sand material and ensure that the sand material has a good bonding effect with the wall after being sprayed.
[0034] It also includes a movable bin door 5 and a hand buckle groove 6. A square installation groove is provided at the conical upper end of the mixing bin 2 and on the side away from the folding rod frame 41. The inside of the installation groove is movably connected with an outward-opening movable bin door 5 through an axle, and a hand buckle groove 6 is reserved on the upper side of the installation groove. The movable bin door 5 is opened outward, and mixing materials such as sand and water can be added into the mixing bin 2. The hand buckle groove 6 can facilitate the fingers to open the movable bin door 5.
[0035] The working principle of a sandblasting device for building decoration construction provided by the utility model is as follows: when using the device, the movable bin door 5 is opened outwards, and mixing materials such as sand, gravel and water can be added into the mixing bin 2, and the hand buckle groove 6 can facilitate the fingers to pry open the movable bin door 5; then the movable bin door 5 is covered, and the motor 311 is started, and the motor 311 drives the stirring impeller 310 on the lower side to rotate through the transmission shaft 38, and the crushing blade 312 fixedly connected to the inclined surface of the stirring impeller 310 can crush and decompose the agglomerated sand material, thereby ensuring that the sprayed sand material is all fine particles, and stirring with a certain amount of water can improve the viscosity of the sand material, ensuring that the sand material has a good bonding effect with the wall after being sprayed. The middle partition 31 is used to divide the interior of the mixing bin 2 into an upper mixing area and a lower transfer area. After the mixing is completed, the hydraulic cylinder 34 is powered on to work, and the hydraulic cylinder 34 drives the channel gate 32 to move horizontally. When the circular through hole on the left side of the channel gate 32 is vertically corresponding to the vertical section of the funnel-shaped structure, the material discharge channel is opened, and the funnel shape inside the middle partition 31 facilitates the mixed sand material to leak downward. The stirred viscous sand material falls to the bottom of the mixing bin 2 and is ejected outward under the pressure of the air compressor 46. The flat nozzle 45 can make the viscous sand material The sand material is sprayed outward in a fan-shaped area, which expands the width of the sandblasting area. The operator holds the flat-head nozzle 45 and sweeps it horizontally, which can easily achieve efficient spraying of the wall. The tube winding roller 42 is used for winding the feed hose 43, and the flat-head nozzle 45 at the end can be horizontally clamped between the two clamping blocks 44, thereby achieving effective storage of the device and facilitating the subsequent movement of the device; the hand push rod 47 is used for the operator's hand to hold, which is convenient for pushing the device to move, and the control switch 48 can facilitate the start and stop of the electrical device in the control device.
[0036] It is worth noting that the input ends of the hydraulic cylinder 34, the motor 311 and the air booster 46 disclosed in the above embodiments are electrically connected to the output end of the external power supply through the control switch 48, and the control switch 48 controls the operation of the above electrical devices using methods commonly used in the prior art.
[0037] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A sandblasting device for building decoration construction, characterized in that: It comprises a mobile base (1), an abrasive material processing unit (3) and a convenient use unit (4); The movable base (1) is provided with a spherical roller on the lower side, and the upper side of the movable base (1) is fixedly connected with a mixing bin (2), and the upper end of the mixing bin (2) is a frustum structure; Sand material processing unit (3): installed inside the mixing bin (2); The convenient use unit (4) comprises a folding rod frame (41), a pipe winding roller (42), a material delivery hose (43), a clamping block (44), a flat-head nozzle (45) and an air booster (46). The mixing bin (2) is fixedly connected to two symmetrically distributed folding rod frames (41) at the rear side. The folding rod frame (41) is composed of a horizontal rod and an inclined rod, and the pipe winding roller (42) is fixedly connected to the lower end of one of the inclined rods. The material delivery hose (43) is led out from the lower side of the mixing bin (2) and is wound around the pipe winding roller (42). The outer side of the mixing bin (2) and adjacent to the pipe winding roller (42) are fixedly connected to two upper and lower clamping blocks (44). The flat-head nozzle (45) is fixedly mounted on the end of the material delivery hose (43) and is limitedly clamped between the two clamping blocks (44). The air booster (46) is embedded and installed at the rear side of the mixing bin (2).
2. A sandblasting device for building decoration construction according to claim 1, characterized in that: The convenient use unit (4) further comprises a push rod (47) and a control switch (48); a push rod (47) is fixedly connected between the left and right folding rod frames (41); and a control switch (48) is installed on the outside of the push rod (47) and at a position close to the user's right hand.
3. A sandblasting device for building decoration construction according to claim 1, characterized in that: The sand material processing unit (3) comprises a middle partition layer (31), a channel gate (32), a circular through hole (33), a hydraulic cylinder (34) and a mounting support plate (35). The middle partition layer (31) is fixedly connected to the middle height of the mixing bin (2). The middle partition layer (31) is a cylindrical structure as a whole and has a funnel-shaped structure inside. A transverse inner slide groove is provided on the lower side of the funnel-shaped structure. A channel gate (32) is slidably connected in the inner slide groove. A circular through hole (33) is provided on the left side of the channel gate (32). The circular through hole (33) has the same diameter as the vertical section of the funnel-shaped structure. The mounting support plate (35) is fixedly connected to the outer side of the mixing bin (2). The upper end of the mounting support plate (35) is fixedly mounted with a hydraulic cylinder (34). The telescopic end of the hydraulic cylinder (34) passes through the side wall of the mixing bin (2) and is fixedly connected to the right end of the channel gate (32).
4. The sandblasting device for building decoration construction according to claim 1, characterized in that: The sand material processing unit (3) further comprises a connecting rod (36), a mounting sleeve (37), a transmission shaft (38) and a coupling (39); a mounting sleeve (37) is mounted at the center position of the upper end of the mixing bin (2); the mounting sleeve (37) is fixedly connected to the inner wall of the mixing bin (2) via three connecting rods (36) arranged in an outer circumferential array; the mounting sleeve (37) is rotatably connected to the transmission shaft (38) via an internal bearing; the upper end of the transmission shaft (38) is fixedly connected to the coupling (39).
5. A sandblasting device for building decoration construction according to claim 4, characterized in that: The sand material processing unit (3) further comprises a stirring impeller (310), a motor (311) and a crushing blade (312); the lower end of the transmission shaft (38) is fixedly connected to the center of the stirring impeller (310); the four blades of the stirring impeller (310) are arranged obliquely and a crushing blade (312) having a triangular cross section is fixedly connected to the inclined surface; the motor (311) is embedded in the interior of the conical upper end of the mixing bin (2); the output shaft of the motor (311) faces downward and is fixedly connected to the transmission shaft (38) via a coupling (39).
6. A sandblasting device for building decoration construction according to claim 1, characterized in that: It also includes a movable bin door (5) and a hand latch groove (6); a square mounting groove is provided at the conical upper end of the mixing bin (2) and on a side away from the folding rod frame (41); an outward-opening movable bin door (5) is movably connected to the interior of the mounting groove via an axle; and a hand latch groove (6) is reserved on the upper side of the mounting groove.