Foldable operation platform device supporting on-site sampling

Abstract

The utility model relates to a foldable operating platform device for supporting on-site sampling, which comprises a foldable cart and a tray, and the foldable cart comprises a basket, an inclined connecting rod and wheels. The inclined connecting rod comprises long rods on the two sides, and the long rods are movably connected with the two sides of the top end of the basket. The tray comprises a flat plate, a rotatable supporting frame and a connecting rotating shaft, the front side of the flat plate is connected with the supporting frame, and the rear side of the flat plate is connected to the inclined span connecting rod through the connecting rotating shaft. The wheels comprise small wheels and large wheels. According to the foldable operation platform device for supporting the on-site sampling, the carrying load bearing capacity of personnel can be improved through the innovative combination of the foldable cart and the tray, and carrying is convenient. And the cart tray is supported to form a horizontal operation platform, so that sampling personnel can manually operate an instrument conveniently, and the cart tray can also be used as a sampling platform meeting the sampling height. A glass sampling tube can be temporarily placed on the operating platform, so that the falling damage caused by excessive holding of articles by personnel is avoided.

Description

Technical Field

[0001] This utility model relates to the field of ambient air field sampling, and more particularly to the field of foldable carts, specifically referring to a foldable operating platform device that supports field sampling. Background Technology

[0002] Environmental air sampling in workplaces and public places requires carrying a large amount of instruments, equipment, and sampling materials such as tripods. This involves heavy loads for personnel to carry, is time-consuming and labor-intensive, and poses transportation difficulties. During on-site sampling, the sampler also needs to be mounted on a tripod, and flow calibration requires placing the sampler and calibrator on a level operating platform. Due to external environmental limitations, there is often no suitable operating platform available for testing personnel, causing significant inconvenience and reducing the efficiency of on-site sampling. Furthermore, during sampling, personnel use a large number of glass sampling consumables; without a platform, samples are easily dropped and damaged.

[0003] Research indicates that most folding trolleys on the market are made of iron or plastic (very few are made of stainless steel), which have poor load-bearing capacity and are easily deformed or damaged when transporting sampling equipment. Furthermore, these trolleys lack supporting trays, failing to provide a platform for sampling operations. While some devices do have operating platforms, the sampling height of these platforms does not meet national health standards, and many similar devices lack load-bearing capacity for handling. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a foldable operating platform device that supports on-site sampling, has strong load-bearing capacity, occupies little space, and has a wide range of applications.

[0005] To achieve the above objectives, the foldable operating platform device of this utility model that supports on-site sampling is as follows:

[0006] This foldable operating platform device, which supports on-site sampling, is characterized by comprising a foldable trolley and a tray. The foldable trolley includes a basket, a diagonal connecting rod, and wheels. The diagonal connecting rod includes long rods on both sides, which are movably connected to the top sides of the basket. The tray includes a flat plate, a connecting shaft, and a support frame. The flat plate has barriers on its left and right sides. The front of the flat plate is connected to the support frame, and the rear of the flat plate is connected to the diagonal connecting rod via the connecting shaft. The wheels include small wheels and large wheels. The small wheels are located on the inner side of the bottom of the diagonal connecting rod, and the large wheels are located on the outer side of the bottom of the rear column of the basket.

[0007] Preferably, the diagonal connecting rod is an inverted U-shaped hollow long rod, and the diagonal connecting rod also includes a horizontal rod at the top connecting the two long rods, the horizontal rod serving as a handrail. The top of the diagonal connecting rod is located above the basket. One end of the upper middle part of the two long rods on both sides of the diagonal connecting rod is movably connected to the two sides of the top of the basket. A sleeve is located between the upper middle part of the diagonal connecting rod and the basket. A sleeve is provided on each of the left and right sides of the basket and is movably connected by a movable riveting structure. The movable riveting structure passes through the sleeve, and the movable riveting structure and the sleeve provide support for the diagonal connecting rod.

[0008] Preferably, the basket is a rectangular prism basket, comprising a front side, a rear side, a left side, a right side, a bottom surface, and four uprights. The uprights are respectively connected between the front and left sides, the front and right sides, the rear and left sides, and the rear and right sides. The left and right sides include multiple parallel strips as side railings, with both ends of the strips rotatably connected to the uprights via a movable riveting structure. The left and right sides support rotation and folding. The front and rear sides are both perforated rectangular mesh railings welded from thin round rods. The left, right, and bottom sides support rotation and folding.

[0009] Preferably, a first bottom connecting shaft is provided in the middle of the bottom surface of the basket, and a second bottom connecting shaft is connected between the diagonal connecting rods. The second bottom connecting shaft is located above the small wheel. Connecting rods are respectively connected to both ends of the first bottom connecting shaft and the two ends of the second bottom connecting shaft. The connecting rods are long strip plates. Both ends of the connecting rods are rotatably connected to the first bottom connecting shaft and the second bottom connecting shaft through a movable riveting structure. The bottom surface of the basket supports rotation and folding.

[0010] Preferably, the tray includes a flat plate, a support frame, and a connecting shaft. The flat plate has a first round hole and a second round hole with rolled edges on its front and rear sides. The connecting shaft passes through the first round hole on the rear side of the flat plate. Both ends of the connecting shaft are connected to a diagonal connecting rod and are located below a horizontal rod. The support frame is located on the front side of the flat plate. The center of the second round hole is a hollow section. The support frame includes a support frame connecting shaft and a long strip support plate. The support frame connecting shaft is inserted into the hollow section of the second round hole, and the support frame can rotate freely within the hollow section. The long strip support plate is welded to the middle of the support frame connecting shaft. The bottom end of the long strip support plate is connected to an H-shaped buckle, which supports being fastened to the top of the front side of the basket.

[0011] Preferably, the tray supports rotation about the connecting pivot, the support frame supports rotation about the support frame connecting pivot, and when the tray is raised, the buckle is engaged with the top of the front side of the basket.

[0012] Preferably, the wheel includes two small wheels, two large wheels, a front axle, and a rear axle. The two small wheels are connected to the front axle, which is connected to the bottom of the diagonal connecting rod and located below the second bottom connecting shaft. The two large wheels are connected to the rear axle, which is connected to the bottom of the column on the rear side of the basket. The two large wheels are located on the outer side below the bottom of the basket.

[0013] Preferably, the inner side of the small wheel is provided with a gasket and welded to the front axle, the outer side of the small wheel is a diagonal connecting rod, the inner side of the large wheel is provided with a gasket, and the outer side of the large wheel is provided with a gasket and a nut, both of which are welded to the rear axle.

[0014] Preferably, the body and tray of the foldable trolley are made of stainless steel.

[0015] Preferably, both the small wheel and the large wheel are solid rubber wheels.

[0016] This invention utilizes a foldable operating platform device to support on-site sampling. Through an innovative combination of a folding trolley and a tray, it enhances the load-bearing capacity for personnel handling, facilitates transport, and improves on-site sampling working conditions. By supporting the trolley and tray, a horizontal operating platform with a height of 1.0m is formed, facilitating manual operation of instruments by sampling personnel. This sampling height also meets the site setting technical requirements stipulated by national health standards. Furthermore, glass sampling tubes can be temporarily placed on this platform to prevent damage from drops due to excessive handling. When folded and stored, the operating platform does not occupy excessive space. Attached Figure Description

[0017] Figure 1a This is a front view of the foldable operating platform device of this utility model when the tray is folded up to support on-site sampling.

[0018] Figure 1b This is a front view of the tray of the foldable operating platform device that supports on-site sampling according to this utility model when it is unfolded.

[0019] Figure 2a This is a side view of the foldable operating platform device of this utility model when the tray is folded up to support on-site sampling.

[0020] Figure 2b This is a side view of the foldable operating platform device of this utility model when the tray is unfolded to support on-site sampling.

[0021] Figure 3 This is a top view of the foldable trolley of the foldable operating platform device that supports on-site sampling of this utility model when folded.

[0022] Figure 4 The side view of the foldable trolley of the foldable operating platform device supporting on-site sampling of this utility model when folded.

[0023] Figure 5 This is a side view of the tray structure of the foldable operating platform device that supports on-site sampling of this utility model when it is unfolded.

[0024] Figure 6 This is a top view of the tray of the foldable operating platform device that supports on-site sampling of this utility model when it is unfolded.

[0025] Figure 7 This is a schematic diagram of the lower part of the foldable trolley of the foldable operating platform device that supports on-site sampling according to this utility model.

[0026] Figure 8 This is a top view of the bottom of the basket of the foldable operating platform device that supports on-site sampling according to this utility model.

[0027] Figure 9 This is a schematic diagram of the sleeve portion of the foldable operating platform device that supports on-site sampling according to this utility model.

[0028] Figure label:

[0029] 1 Foldable stroller

[0030] 2 trays

[0031] 3. Basket

[0032] 4. Diagonal connecting rod

[0033] 5 wheels

[0034] 6. Rectangular flat plate

[0035] 7. Support frame

[0036] 8 Connecting shaft

[0037] 9 casings

[0038] 10 Connection points using movable riveting structure

[0039] 31 basket support columns

[0040] 32 long strips

[0041] 33. Hollowed-out rectangular mesh fence

[0042] 34 First bottom connecting shaft

[0043] 35 Second bottom connecting shaft

[0044] 36 connecting rods

[0045] 41 Horizontal bar

[0046] 51 small wheels

[0047] 52 front axle

[0048] 53 large wheels

[0049] 54 rear axle

[0050] 61 enclosure

[0051] 62 First round hole

[0052] 63 Second round hole

[0053] 71 Support frame connecting shaft

[0054] 72 long strip support plates

[0055] 73 buckles Detailed Implementation

[0056] To more clearly describe the technical content of this utility model, the following description is provided in conjunction with specific embodiments.

[0057] This utility model relates to a foldable operating platform device that supports on-site sampling. It includes a foldable trolley 1 and a tray 2. The foldable trolley 1 includes a basket 3, a diagonal connecting rod 4, and wheels 5. The diagonal connecting rod 4 includes long rods on both sides, which are movably connected to the top sides of the basket 3. The tray 2 includes a flat plate 6, a support frame 7, and a connecting shaft 8. The flat plate 6 has barriers 61 on its left and right sides. The front of the flat plate 6 is connected to the support frame 7, and the rear of the flat plate 6 is connected to the diagonal connecting rod 4 via the connecting shaft 8. The support frame 7 includes a support frame connecting shaft 71, a long strip support plate 72, and a lower H-shaped buckle 73. The wheels 5 include small wheels 51 and large wheels 53. The small wheels 51 are located on the inner side of the bottom of the diagonal connecting rod 4, and the large wheels 53 are located on the outer side of the bottom of the rear column of the basket 3.

[0058] In a preferred embodiment of this utility model, the inclined connecting rod 4 is an inverted U-shaped hollow long rod. The inclined connecting rod 4 also includes a horizontal rod 41 at the top connected between the two long rods. The horizontal rod 41 serves as a handrail. The top of the inclined connecting rod 4 is located above the basket 3. One end of the upper middle part of the long rods on both sides of the inclined connecting rod 4 is movably connected to the two sides of the top of the basket 3. The sleeve 9 is located between the upper middle part of the inclined connecting rod 4 and the basket 3. A sleeve 9 is provided on each of the left and right sides of the basket. The movable riveting structure passes through the sleeve 9. The movable riveting structure and the sleeve 9 provide support for the inclined connecting rod 4 and prevent the inclined connecting rod 4 from deforming under force.

[0059] In a preferred embodiment of this utility model, the basket 3 is a cuboid basket, comprising a front side, a rear side, a left side, a right side, a bottom surface, and four basket pillars 31. The basket pillars 31 are respectively connected between the front and left sides, the front and right sides, the rear and left sides, and the rear and right sides of the basket. The left and right sides of the basket include multiple parallel long strips 32 as side railings. The two ends of the multiple long strips 32 are rotatably connected to the basket pillars 31 through a movable riveting structure. The left and right sides of the basket support rotation and folding. The front and rear sides of the basket are both hollow rectangular mesh railings 33 welded from thin round rods. The left and right sides of the basket 3 support rotation and folding.

[0060] In a preferred embodiment of this utility model, a first bottom connecting shaft 34 is provided in the middle of the bottom surface of the basket, and a second bottom connecting shaft 35 is connected between the diagonal connecting rods 4. The second bottom connecting shaft 35 is located above the wheel 51. Connecting rods 36 are respectively connected to both ends of the first bottom connecting shaft 34 and the two ends of the second bottom connecting shaft 35. The connecting rods 36 are long strip plates. Both ends of the connecting rods 36 are rotatably connected to the first bottom connecting shaft 34 and the second bottom connecting shaft 35 through a movable riveting structure. The bottom surface of the basket supports rotation and folding.

[0061] In a preferred embodiment of this utility model, the tray 2 includes a flat plate 6, a support frame 7, and a connecting shaft 71. The flat plate 6 has a first round hole 62 and a second round hole 63 with rolled edges on its front and rear sides. The connecting shaft 8 passes through the first round hole 62 on the rear side of the flat plate 6. The two ends of the connecting shaft 8 are connected to the diagonal connecting rod 4 and are located below the horizontal rod 41. The support frame 7 is located on the front side of the flat plate 6. The center of the second round hole 63 is a hollow section. The support frame 7 includes a support frame connecting shaft 71 and a long strip support plate 72. The support frame connecting shaft 71 is inserted into the hollow section of the second round hole 63, and the support frame can rotate freely within the hollow section. The long strip support plate 72 is welded to the middle of the support frame connecting shaft 71. The bottom end of the long strip support plate 72 is connected to an H-shaped buckle 73, which supports being fastened to the top of the front side of the basket.

[0062] In a preferred embodiment of the present invention, the tray 2 supports rotation about the connecting shaft 8, the support frame 7 supports rotation about the support frame connecting shaft 71, and when the tray 2 is raised, the buckle 73 is locked at the top of the front side of the basket.

[0063] In a preferred embodiment of this utility model, the wheel 5 includes two small wheels 51, two large wheels 53, a front axle 52, and a rear axle 54. The two small wheels 51 are connected to the front axle 52, which is connected to the bottom of the diagonal connecting rod 4 and located below the second bottom connecting shaft 35. The two large wheels 53 are connected to the rear axle 54, which is connected to the bottom of the column 31 on the rear side of the basket 3. The two large wheels 53 are located on the outer side below the bottom of the basket.

[0064] In a preferred embodiment of this utility model, the inner side of the small wheel 51 is provided with a washer and welded to the front axle 52. The outer side of the small wheel 51 is a diagonal connecting rod 4. The washer and the diagonal connecting rod 4 can prevent the small wheel 51 from sliding arbitrarily left or right. The inner side of the large wheel 53 is provided with a washer, and the outer side of the large wheel 53 is provided with a washer and a nut. The washer and the nut are both welded to the rear axle 54. The washer and the nut can prevent the large wheel 53 from sliding arbitrarily left or right.

[0065] In a preferred embodiment of this utility model, both the body of the foldable trolley 1 and the tray 2 are made of stainless steel.

[0066] In a preferred embodiment of this utility model, both the small wheel 51 and the large wheel 53 are solid rubber wheels.

[0067] In a specific embodiment of this utility model, a foldable operating platform device supporting on-site sampling is disclosed. The device includes a foldable trolley 1 and a tray 2. The foldable trolley 1 includes a basket 3, a diagonal connecting rod 4, and wheels 5. The tray is a rectangular flat plate 6, a rotatable support frame 7, and a connecting shaft 8. Both the body of the foldable trolley 1 and the tray 2 are made of stainless steel. Using stainless steel not only has the advantages of being waterproof, rustproof, drop-resistant, and not easily deformed, but also allows for an appropriate increase in weight, lowering the center of gravity of the vehicle.

[0068] The basket 3 is a rectangular basket with dimensions of 32cm (length) × 30cm (width) × 60cm (height). The basket's uprights 31 are tubular structures. The right and left sides of the basket have multiple parallel strips 32, 10mm wide and 3mm thick, serving as side railings. The rear and front sides of the basket are constructed with perforated rectangular mesh railings 33 welded from thin round rods with a diameter of 2mm. The ends of the strips 32 on both sides of the basket are riveted to the uprights 31, allowing the basket 3 to fold. A connecting shaft 34 is located in the center of the bottom of the basket 3. Additionally, a connecting shaft 35 is located approximately 20mm above the small wheels 51 in the area at the bottom of the diagonal connecting rod 4. When the basket 3 is unfolded, the connecting shaft 35 provides support for the bottom of the basket 3. Connecting rods 36 are attached to both ends of connecting shafts 34 and 35. Each connecting rod 36 is a long strip, 10mm wide and 3mm thick, with one on each side of the basket, arranged symmetrically. The ends of the connecting rods 36 are riveted to connecting shafts 34 and 35, facilitating the folding function of the basket and preventing displacement during folding. When unfolded, the basket creates a storage space of 32cm x 30cm x 60cm, capable of holding items with a volume of 30cm x 28cm x 60cm, with a maximum load capacity of 13-15kg.

[0069] The diagonal connecting rod 4 is an inverted U-shaped hollow long rod connecting both sides of the foldable trolley. The horizontal rod 41 at the top between the two long rods serves as a handrail, and the top of the diagonal connecting rod 4 is located above the basket 4. The bottom of the diagonal connecting rod 4 is connected to the front axle 52 of the small wheel 51 and is welded and fixed to the front axle 52. The upper middle part of the long rods on both sides of the diagonal connecting rod 4 is movably connected to the two sides of the top of the basket 3. A 10mm long sleeve 9 is provided between the upper middle part of the diagonal connecting rod 4 and the basket 3. There is a sleeve 9 on each side of the basket 3, and they are movably connected by a movable riveting structure. The movable riveting structure passes through the sleeve to provide support for the diagonal connecting rod 4 and prevent the diagonal connecting rod 4 from deforming under force.

[0070] The tray 2 consists of a rectangular flat plate 6, a rotatable support frame 7, and a connecting shaft 8. The flat plate 6 measures 40cm x 30cm, with 5mm thick guardrails 61 on both sides. The front and rear sections of the flat plate 6 have a first round hole 62 and a second round hole 63 with rolled edges. A connecting shaft 8 with a diameter of 7mm is located 60mm below the top of the horizontal bar 41 of the foldable trolley. The connecting shaft 8 passes through the first round hole 62 and is fixed to the diagonal connecting rod 4 to connect the tray 2. The tray 2 can rotate around the connecting shaft 8. The front of the flat plate 6 has a through second round hole 63 with a 50mm long hollow section at its center. The T-shaped support frame 7 is welded together from a 5mm diameter support frame connecting shaft 71 and a 40mm wide, 3mm thick long strip support plate 72. The bottom of the support frame 7 has an H-shaped buckle 73, which is welded together. The connecting shaft at the upper end of the support frame 7 is inserted into the empty section and rotates within the empty section with the connecting shaft 71 of the support frame as the center. When the tray 2 is unfolded, the buckle 73 is locked onto the top of the front side of the basket, forming a horizontal operating platform with a height of about 1.0m and a load-bearing capacity of up to 5kg.

[0071] The wheels 5 consist of a small wheel 51 with a diameter of 70mm and a large wheel 53 with a diameter of 130mm. Both wheels 5 are solid rubber wheels, featuring wear resistance and noise reduction. The small wheel 51 is connected via the front axle 52. The outer side of the small wheel 51 is connected by a diagonal connecting rod 4, and the inner side of the small wheel 51 is equipped with a washer, which is welded to the front axle 52 to prevent the wheel from sliding left and right. The large wheel 53 is connected via the rear axle 54, which is connected to the bottom of the rear upright 31 of the basket, 10mm below the bottom of the basket. The outer side of the large wheel 53 is equipped with a washer and a nut, and the inner side of the large wheel 53 is also equipped with a washer. The inner and outer washer and nut are welded to the rear axle 54 to prevent the wheel from sliding left and right.

[0072] For the specific implementation scheme of this embodiment, please refer to the relevant descriptions in the above embodiments, which will not be repeated here.

[0073] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0074] It should be noted that in the description of this utility model, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means at least two.

[0075] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0076] This invention utilizes a foldable operating platform device to support on-site sampling. Through an innovative combination of a folding trolley and a tray, it enhances the load-bearing capacity for personnel handling, facilitates transport, and improves on-site sampling working conditions. By supporting the trolley and tray, a horizontal operating platform with a height of 1.0m is formed, facilitating manual operation of instruments by sampling personnel. This sampling height also meets the site setting technical requirements stipulated by national health standards. Furthermore, glass sampling tubes can be temporarily placed on this platform to prevent damage from drops due to excessive handling. When folded and stored, the operating platform does not occupy excessive space.

[0077] In this specification, the present invention has been described with reference to specific embodiments thereof. However, it will be apparent that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, the specification and drawings should be considered illustrative rather than restrictive.

Claims

1. A foldable operating platform device supporting on-site sampling, characterized in that, The device includes a foldable trolley (1) and a tray (2). The foldable trolley (1) includes a basket (3), a diagonal connecting rod (4), and wheels (5). The diagonal connecting rod (4) includes long rods on both sides, which are movably connected to the top sides of the basket (3). The tray (2) includes a flat plate (6), a support frame (7), and a connecting shaft (8). The flat plate (6) has guardrails (61) on its left and right sides, and the front of the flat plate (6) is connected to the support frame. The frame (7) is connected, and the rear side of the flat plate (6) is connected to the diagonal connecting rod (4) through the connecting shaft (8). The support frame (7) includes a support frame connecting shaft (71), a long strip support plate (72) and a lower H-shaped buckle (73). The wheel (5) includes a small wheel (51) and a large wheel (53). The small wheel (51) is located on the inner side of the bottom of the diagonal connecting rod (4), and the large wheel (53) is located on the outer side of the bottom of the rear column of the basket (3).

2. The foldable operating platform device supporting on-site sampling according to claim 1, characterized in that, The inclined connecting rod (4) is an inverted U-shaped hollow long rod. The inclined connecting rod (4) also includes a horizontal rod (41) at the top between the two long rods. The horizontal rod (41) serves as a handrail. The top of the inclined connecting rod (4) is located above the basket (3). One end of the upper middle part of the long rods on both sides of the inclined connecting rod (4) is movably connected to the two sides of the top of the basket (3). The sleeve (9) is located between the upper middle part of the inclined connecting rod (4) and the basket (3). A sleeve (9) is provided on each side of the basket and is movably connected by a movable riveting structure. The movable riveting structure passes through the sleeve (9). The movable riveting structure and the sleeve (9) provide support for the inclined connecting rod (4).

3. The foldable operating platform device supporting on-site sampling according to claim 1, characterized in that, The basket (3) is a rectangular basket. The basket (3) includes a front side, a rear side, a left side, a right side, a bottom surface, and four basket pillars (31). The basket pillars (31) are connected between the front side and the left side, the front side and the right side, the rear side and the left side, and the rear side and the right side, respectively. The left side and the right side of the basket include multiple parallel long strips (32) as side railings. The two ends of the multiple long strips (32) are rotatably connected to the basket pillars (31) through a movable riveting structure. The left side and the right side of the basket support rotation and folding. The front side and the rear side of the basket are both hollow rectangular mesh railings (33) welded from thin round rods. The left side and the right side of the basket (3) support rotation and folding.

4. The foldable operating platform device supporting on-site sampling according to claim 3, characterized in that, The bottom of the basket is provided with a first bottom connecting shaft (34) in the middle, and a second bottom connecting shaft (35) is connected between the diagonal connecting rods (4). The second bottom connecting shaft (35) is located above the small wheel (51). The two ends of the first bottom connecting shaft (34) and the two ends of the second bottom connecting shaft (35) are respectively connected to connecting rods (36). The connecting rods (36) are long strip plates. The two ends of the connecting rods (36) are rotatably connected to the first bottom connecting shaft (34) and the second bottom connecting shaft (35) through a movable riveting structure. The bottom of the basket (3) supports rotation and folding.

5. The foldable operating platform device for supporting on-site sampling according to claim 1, characterized in that, The tray (2) further includes a flat plate (6), a support frame (7), and a connecting shaft (8). The flat plate (6) has a first round hole (62) and a second round hole (63) with rolled edges on its front and rear sides. The connecting shaft (8) passes through the first round hole (62) on the rear side of the flat plate (6). The two ends of the connecting shaft (8) are connected to the diagonal connecting rod (4) and are located below the horizontal rod (41). The support frame (7) is located on the front side of the flat plate (6). The second round hole (63) is located in the middle of the second round hole (63). The center section is a hollow section. The support frame (7) includes a support frame connecting shaft (71) and a long strip support plate (72). The support frame connecting shaft (71) is inserted into the hollow section of the second round hole (63), and the support frame (7) can rotate freely in the hollow section. The long strip support plate (72) is welded to the middle of the support frame connecting shaft (71). The bottom end of the long strip support plate (72) is welded to an h-shaped buckle (73), which supports the top of the front side of the basket.

6. The foldable operating platform device for supporting on-site sampling according to claim 5, characterized in that, The tray (2) supports rotation about the connecting shaft (8), the support frame (7) supports rotation about the support frame connecting shaft (71), and when the tray (2) is raised, the buckle (73) is locked on the top of the front side of the basket.

7. The foldable operating platform device for supporting on-site sampling according to claim 1, characterized in that, The wheel (5) includes two small wheels (51), two large wheels (53), a front axle (52) and a rear axle (54). The two small wheels (51) are connected to the front axle (52), which is connected to the bottom of the diagonal connecting rod (4) and located below the second bottom connecting shaft (35). The two large wheels (53) are connected to the rear axle (54), which is connected to the bottom of the column (31) on the rear side of the basket. The two large wheels (53) are located on the outside of the bottom of the basket (3).

8. The foldable operating platform device for supporting on-site sampling according to claim 7, characterized in that, The inner side of the small wheel (51) is provided with a gasket and welded to the front axle (52). The outer side of the small wheel (51) is a diagonal connecting rod (4). The inner side of the large wheel (53) is provided with a gasket. The outer side of the large wheel (53) is provided with a gasket and a nut. The gasket and the nut are both welded to the rear axle (54).

9. The foldable operating platform device for supporting on-site sampling according to claim 1, characterized in that, The body and tray (2) of the foldable trolley (1) are both made of stainless steel.

10. The foldable operating platform device for supporting on-site sampling according to claim 1, characterized in that, Both the small wheel (51) and the large wheel (53) are solid rubber wheels.

Images