Weighing device

Abstract

The utility model provides a weighing device, which comprises a box body, a first conveying mechanism, a weighing mechanism, a first push plate and a control mechanism, and is characterized in that a feeding hole is formed in the upper part of the box body; the first conveying mechanism is arranged in the box body and is used for conveying sample boxes; the weighing mechanism is arranged at the output end of the first conveying mechanism and used for weighing the sample boxes output by the first conveying mechanism; the first push plate is arranged above the weighing mechanism and is used for pushing the sample box on the weighing mechanism out of the weighing mechanism; the control mechanism is electrically connected with the output end of the weighing mechanism, and the control mechanism is used for receiving the weight value of the sample box sent by the weighing mechanism and controlling the first push plate to start after receiving the weight value, so that the first push plate pushes out the sample box on the weighing mechanism from the weighing mechanism. According to the weighing device provided by the utility model, the tobacco shred sample box can be automatically weighed, the sample box is prevented from being exposed in an open environment, the detection error is reduced, and the efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cigarette detection technical field, especially a weighing device. BACKGROUND

[0002] Silk making is an important link in cigarette manufacturing process, and silk making is to make tobacco leaves through processes of moisture recovery, material adding, cutting, drying and flavoring, so that the finished cut tobacco meets the process requirements and satisfies the needs of rolling. The moisture content of the finished cut tobacco is directly related to the smoking taste of the cigarette and the physical and chemical qualities of the cigarette, and is an important index parameter of cigarette manufacturing. Therefore, the moisture content of the cut tobacco needs to be determined to ensure the quality of the cigarette.

[0003] At present, the moisture content of the cut tobacco is mainly determined by an oven method. An inspector takes samples of the cut tobacco, weighs the samples after packing them into boxes, puts them into an oven for drying, takes out the sample boxes after cooling, and then weighs each sample box in turn to calculate the moisture content of the cut tobacco. During the cooling and weighing process after the drying of the cut tobacco, the inspector needs to manually weigh each sample box in turn. On the one hand, the sample boxes are exposed in an open environment for a long time, causing the cut tobacco to absorb moisture in the air and resulting in a large detection error of the moisture content. On the other hand, the detection efficiency is low. SUMMARY

[0004] The utility model discloses a kind of weighing devices, can be automated weighing to cut tobacco sample box in closed space, avoid sample box exposure in open environment, reduce detection error, improve efficiency.

[0005] The embodiment of the utility model provides a kind of weighing device, for weighing the weight of cut tobacco sample box, weighing device includes:

[0006] Box, its upper portion is equipped with inlet, inlet is equipped with lid;

[0007] First conveying mechanism, it is located in box, and first conveying mechanism is used to convey sample box;

[0008] Weighing mechanism, it is located in the output end of first conveying mechanism, and weighing mechanism is used to weigh the weight of sample box output by first conveying mechanism;

[0009] First push plate, it is located above weighing mechanism, for sample box on weighing mechanism is pushed out from weighing mechanism;

[0010] The control mechanism is electrically connected with the output end of the weighing mechanism, and is used for receiving the weight value of the sample box sent by the weighing mechanism, and after receiving the weight value, the control mechanism controls the first push plate to start, so that the first push plate pushes the sample box on the weighing mechanism out of the weighing mechanism.

[0011] According to another specific embodiment of the present application, the first conveying mechanism comprises:

[0012] The first conveying belt is arranged below the feeding port and extends along a first direction;

[0013] The second conveying belt extends along a second direction, the second direction is perpendicular to the first direction, the input end of the second conveying belt is close to the output end of the first conveying belt, and the weighing mechanism is arranged at the output end of the second conveying belt.

[0014] According to another specific embodiment of the present application, the outer surface of the sample box is marked with a box number, the inner side of the cover is provided with a box number identifier, when the cover is closed, the box number identifier is located above the weighing mechanism, and the identification end of the box number identifier faces the weighing mechanism, the box number identifier is electrically connected with the control mechanism, and the box number identifier is used for identifying the box number and sending the box number to the control mechanism.

[0015] According to another specific embodiment of the present application, the first driving member is connected with the first push plate, and the first driving member is used for driving the first push plate to move, so as to push the sample box out of the weighing mechanism.

[0016] According to another specific embodiment of the present application, the weighing mechanism is an electronic balance.

[0017] According to another specific embodiment of the present application, the present application further comprises:

[0018] The second conveying mechanism is arranged on one side of the weighing mechanism, and the first push plate can push the sample box on the weighing mechanism to the second conveying mechanism;

[0019] The collecting mechanism is arranged in the box body, and is used for receiving the sample box output by the second conveying mechanism.

[0020] According to another specific embodiment of the present application, the collecting mechanism is a screen, and a containing space is formed between the screen and the bottom of the box body, and the containing space is used for containing a drying agent.

[0021] According to another specific embodiment of the present application, the second conveying mechanism comprises:

[0022] The input end of the third conveying belt is close to the weighing mechanism, and the distance between the third conveying belt and the bottom of the box body gradually decreases along the conveying direction of the third conveying belt;

[0023] A fourth conveying belt extends in the second direction, an input end of the fourth conveying belt is close to the output end of the third conveying belt, and a screen is arranged at an output end of the fourth conveying belt.

[0024] A second push plate is arranged above the fourth conveying belt, and the second push plate is used for pushing the sample box on the fourth conveying belt to the screen.

[0025] According to another specific embodiment of the present application, a second driving member is connected with the second push plate, and the second driving member is used for driving the second push plate to move.

[0026] According to another specific embodiment of the present application, a pressure sensor is arranged on the second push plate, and the pressure sensor is used for detecting whether the side, away from the second push plate, of the sample box contacts the inner wall of the box or other sample boxes.

[0027] According to another specific embodiment of the present application, sensors are arranged on the first conveying belt, the second conveying belt, the third conveying belt and the fourth conveying belt, the sensors on the first conveying belt and the second conveying belt are used for detecting whether there is a sample box on the conveying belt corresponding to the sensors, and the sensors on the third conveying belt and the fourth conveying belt are used for detecting whether there is a sample box at the input end of the conveying belt corresponding to the sensors.

[0028] According to another specific embodiment of the present application, two side doors are arranged on the side wall of the box, and the two side doors correspond to the space above the screen and the position of the containing space respectively.

[0029] Compared with the prior art, the present application has the following beneficial effects:

[0030] The weighing device provided by the present application comprises a box, a first conveying mechanism, a weighing mechanism, a first push plate and a control mechanism, and the box is provided with a feeding port. When it is necessary to weigh the sample boxes of dried tobacco shreds, the sample boxes are first placed into the box through the feeding port, and then the cover at the feeding port is closed to make the box airtight. The sample boxes in the box are conveyed to the weighing mechanism by the first conveying mechanism, the weighing mechanism starts to weigh the sample boxes, and the weight value of the sample boxes is sent to the control mechanism. Then, the control mechanism controls the first push plate to push the sample boxes out of the weighing mechanism. The above process is repeated until all the sample boxes are weighed. The present application can automatically weigh the sample boxes of tobacco shreds in an airtight space, avoids exposing the sample boxes to an open environment, reduces the detection error and improves the efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 FIG. 1 shows a schematic view of a weighing device according to an embodiment of the present application;

[0032] Figure 2 FIG. 2 shows a schematic view of a first conveying belt according to an embodiment of the present application.

[0033] Reference signs:

[0034] 1. box; 11. inlet; 12. cover; 2. first conveying mechanism; 21. first conveying belt; 22. second conveying belt; 3. weighing mechanism; 4. first push plate; 5. control mechanism; 6. first driving member; 7. sample box; 8. box number identifier; 9. second conveying mechanism; 91. third conveying belt; 92. fourth conveying belt; 93. second push plate; 94. second driving member; 10. screen; 13. containing space; 14. side door; 15. opening. DETAILED DESCRIPTION

[0035] The above description merely illustrates the principles of the application. It will thus be appreciated that those skilled in the art will be able to devise various arrangements that, although not explicitly described or shown herein, embody the principles of the application and are thus within its spirit and scope. Furthermore, there are several variations to the embodiments discussed above, and it is intended to embrace all such variations within the scope of the appended claims. In addition, numerous variations and modifications will become apparent to those skilled in the art once the above description is read. For example, elements of one embodiment can be combined with those of another embodiment. Where appropriate, aspects of the embodiments incorporating the variations and modifications can be employed in combination with other aspects of the embodiments. Therefore, the application is not to be limited to the specific illustrative embodiments disclosed in this release. All publications and patent documents cited herein are incorporated by reference in their entirety for the purpose of explaining the principles of the present application as furnished by the patent or application filing office. The application in its broadest form is set out in the appended claims.

[0036] It should be noted that, in this specification, similar reference signs and letters indicate similar items in the accompanying drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0037] The terms "first", "second", etc. are used only to distinguish descriptions, and cannot be understood as indicating or implying relative importance.

[0038] In the description of the embodiments, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments can be understood according to the specific circumstances.

[0039] Currently, the quality inspector needs to manually weigh each sample box after drying in turn, on the one hand, the sample box is exposed in the open environment for a long time, which causes the sample to absorb moisture in the air, resulting in large detection error of moisture content.

[0040] To solve the above technical problems, the utility model provides a kind of weighing device, can be automated weighing to tobacco sample box in closed space, avoid sample box exposure in open environment, reduce the detection error, improve efficiency.

[0041] To make the technical scheme and advantages of the utility model more clear, the embodiment of the utility model is further described in detail.

[0042] Reference Figure 1 And Figure 2 The embodiment of the utility model provides a kind of weighing device, including box 1, first conveying mechanism 2, weighing mechanism 3, first push plate 4 and control mechanism 5.Box 1 top is equipped with inlet 11, and inlet 11 is equipped with lid 12.First conveying mechanism 2 is located in box 1, and first conveying mechanism 2 is used to convey sample box 7.Weighing mechanism 3 is located in the output end of first conveying mechanism 2, and weighing mechanism 3 is used to weigh the weight of sample box 7 output by first conveying mechanism 2.First push plate 4 is located above weighing mechanism 3, and is used to push sample box 7 on weighing mechanism 3 from weighing mechanism 3.Control mechanism 5 is electrically connected with the output end of weighing mechanism 3, and control mechanism 5 is used to receive the weight value of sample box 7 sent by weighing mechanism 3, and after receiving weight value, control first push plate 4 starts, so that first push plate 4 pushes sample box 7 on weighing mechanism 3 from weighing mechanism 3.Specifically, reference Figure 1 The weighing device provided in the embodiment further includes first driving part 6, and first driving part 6 is connected with first push plate 4, and first driving part 6 is used to drive first push plate 4 to move, to push sample box 7 from weighing mechanism 3.

[0043] When the weight of tobacco sample box 7 after drying needs to be weighed, first, sample box 7 is placed into box 1 through inlet 11, then lid 12 at inlet 11 is closed, so that box 1 is sealed.Sample box 7 in box 1 is conveyed to weighing mechanism 3 by first conveying mechanism 2, weighing mechanism 3 starts to weigh sample box 7, and sends the weight value of sample box 7 to control mechanism 5.Subsequently, control mechanism 5 controls first push plate 4 to push sample box 7 from weighing mechanism 3.Repeat the above process until all sample boxes 7 are weighed.The application can automatically weigh tobacco sample box 7 in closed space, avoid sample box 7 exposure in open environment, reduce the detection error, improve efficiency.

[0044] Exemplarily, weighing mechanism 3 can be electronic balance.

[0045] Specifically, referring to Figure 1 , the first conveying mechanism 2 comprises a first conveying belt 21 and a second conveying belt 22. The first conveying belt 21 is arranged below the feeding port 11 and extends along a first direction (as indicated by the X direction in Figure 1 ). The second conveying belt 22 extends along a second direction (as indicated by the Y direction in Figure 1 ), and the input end of the second conveying belt 22 is close to the output end of the first conveying belt 21. The weighing mechanism 3 is arranged at the output end of the second conveying belt 22. The operator can arrange the sample boxes 7 on the first conveying belt 21 in columns. Each column of sample boxes 7 comprises a plurality of sample boxes 7 arranged in sequence and spaced apart along the second direction. The sample boxes 7 in each column are spaced apart along the first direction, as indicated by Figure 2 . When the sample boxes 7 are started to be weighed, the first conveying belt 21 first conveys a column of sample boxes 7 (such as the sample boxes 7 contained in the dashed box S1 in Figure 2 ) closest to the second conveying belt 22 to the second conveying belt 22. Then, the second conveying belt 22 starts to convey each sample box 7 on it to the weighing mechanism 3 in sequence one by one, so that the weighing mechanism 3 weighs the sample boxes 7. After the weighing mechanism 3 weighs each sample box 7, the first driving member 6 drives the first push plate 4 to push the weighed sample box 7 out of the weighing mechanism 3. When all the sample boxes 7 on the second conveying belt 22 are conveyed, the first conveying belt 21 starts to convey the next column of sample boxes 7 (such as the sample boxes 7 contained in the dashed box S2 in Figure 2 ) to the second conveying belt 22. The present application realizes the automatic conveying of the sample boxes 7 by arranging the first conveying belt 21 and the second conveying belt 22, and improves the work efficiency.

[0046] Optionally, referring to Figure 1 , the outer surface of the sample box 7 is marked with a box number (not shown in the figure). The inner side of the cover 12 of the box 1 is provided with a box number identifier 8. When the cover 12 is closed, the box number identifier 8 is located above the weighing mechanism 3, and the identification end of the box number identifier 8 faces the weighing mechanism 3. The box number identifier 8 is electrically connected with the control mechanism 5. The box number identifier 8 is used to identify the box number and send the box number to the control mechanism 5. Exemplarily, the box number identifier 8 is a code reader. The box number on the sample box 7 is printed in the form of a bar code on the outer surface of the sample box 7. When the sample box 7 moves to the weighing mechanism 3, the code reader can scan the bar code of the sample box 7 on the weighing mechanism 3 to identify the corresponding box number of the sample box 7. The present application sends the corresponding box number of each sample box 7 to the control mechanism 5 through the arrangement of the box number identifier 8, so that the control mechanism 5 marks the corresponding weight value of each sample box 7.

[0047] Optionally, referring to Figure 1The weighing device provided by the embodiment further comprises a second conveying mechanism 9 and a collecting mechanism. The second conveying mechanism 9 is arranged on one side of the weighing mechanism 3, and the first push plate 4 can push the sample box 7 on the weighing mechanism 3 to the second conveying mechanism 9. The collecting mechanism is arranged in the box body 1, and is used for receiving the sample box 7 output by the second conveying mechanism 9.

[0048] Specifically, referring to Figure 1 The second conveying mechanism 9 comprises a third conveying belt 91, a fourth conveying belt 92 and a second push plate 93. The input end of the third conveying belt 91 is close to the weighing mechanism 3. Along the conveying direction of the third conveying belt 91, the spacing between the third conveying belt 91 and the bottom of the box body 1 gradually decreases. The fourth conveying belt 92 extends in a second direction, and the input end of the fourth conveying belt 92 is close to the output end of the third conveying belt 91. The screen 10 is arranged at the output end of the fourth conveying belt 92. The second push plate 93 is arranged above the fourth conveying belt 92, and is used for pushing the sample box 7 on the fourth conveying belt 92 to the screen 10. The second conveying mechanism 9 further comprises a second driving member 94, which is connected with the second push plate 93 and is used for driving the second push plate 93 to move. Further, a pressure sensor (not shown in the figure) is arranged on the second push plate 93, and is used for detecting whether the side, away from the second push plate 93, of the sample box 7 contacts the inner wall of the box body 1 or other sample boxes 7.

[0049] The sample box 7 weighed by the weighing mechanism 3 is pushed out by the first push plate 4 to the third conveying belt 91, and the third conveying belt 91 conveys the sample box 7 to the input end of the fourth conveying belt 92. The fourth conveying belt 92 operates intermittently. When the first sample box 7 is conveyed to the fourth conveying belt 92, the fourth conveying belt 92 drives the first sample box 7 to move a certain distance and then stops. Subsequently, the second sample box 7 is conveyed to the fourth conveying belt 92, the fourth conveying belt 92 drives the first sample box 7 and the second sample box 7 to move a certain distance and then stops. In this way, the sample boxes 7 in the same column are filled from the input end to the output end of the fourth conveying belt 92. Subsequently, the second push plate 93 is started, and the sample boxes 7 on the fourth conveying belt 92 are pushed to the screen 10 together. A threshold value is set for the pressure sensor on the second push plate 93. When the side, away from the second push plate 93, of the sample box 7 contacts a solid object, the movement of the sample box 7 is hindered, and the sample box 7 stops moving and exerts a pressure on the second push plate 93. When the pressure sensor detects that the pressure value is greater than the threshold value, it indicates that the side of the second push plate 93 contacts the inner wall of the box body 1 or other sample boxes 7 on the screen. At this time, the sample box 7 has been positioned, the second push plate 93 stops pushing the sample box 7, and then the second driving member 94 drives the second push plate 93 to reset (i.e., to move to the position shown in FIG. 1). Figure 1The second push plate 93 is located in the position of the second conveying mechanism 9, and the fourth conveying mechanism 92 is located in the position of the second push plate 93. The device waits for the next row of sample boxes 7 to be conveyed to the fourth conveying mechanism 92. The second conveying mechanism 9 and the screen 10 are arranged, the weighed sample boxes 7 are concentrated on the screen 10 by the second conveying mechanism 9, so that the sample boxes 7 are concentrated and stored.

[0050] Optionally, sensors (not shown in the figure) are arranged on the first conveying mechanism 21, the second conveying mechanism 22, the third conveying mechanism 91 and the fourth conveying mechanism 92. The sensors can be photoelectric sensors. The sensors on the first conveying mechanism 21 and the second conveying mechanism 22 are used to detect whether there are sample boxes on the conveying mechanisms. The sensors on the third conveying mechanism 91 and the fourth conveying mechanism 92 are used to detect whether there are sample boxes at the input end of the conveying mechanisms. After the operator puts a plurality of rows of sample boxes 7 on the first conveying mechanism 21 through the input port 11 and closes the cover 12, the first conveying mechanism 21 is started. The device first conveys the row of sample boxes 7 closest to the second conveying mechanism 22 to the second conveying mechanism 22. Then, when the sensor detects that there are sample boxes 7 on the second conveying mechanism 22, the second conveying mechanism 22 starts to convey the sample boxes 7 on it to the weighing mechanism 3 one by one. When the sensor detects that there are no sample boxes 7 on the second conveying mechanism 22 and there are sample boxes 7 on the first conveying mechanism 21, the first conveying mechanism 21 is started again to convey the row of sample boxes 7 closest to the second conveying mechanism 22 to the second conveying mechanism 22. When the sensor detects that there are no sample boxes 7 on the first conveying mechanism 21, the operator can supplement the sample boxes 7 on the first conveying mechanism 21.

[0051] After the weighing mechanism 3 weighs each sample box 7, the first driving member 6 drives the first push plate 4 to push the weighed sample box 7 from the weighing mechanism 3 to the third conveying mechanism 91. After the weighing mechanism 3 conveys a sample box 7 to the third conveying mechanism 91, when the sensor detects that there is a sample box 7 at the input end of the third conveying mechanism 91, the third conveying mechanism 91 is started to convey the sample boxes 7 to the input end of the fourth conveying mechanism 92 one by one. When the sensor on the fourth conveying mechanism 92 detects that there is a sample box 7 at the input end of the fourth conveying mechanism 92, the fourth conveying mechanism 92 is started. When the first sample box 7 is conveyed to the fourth conveying mechanism 92, the fourth conveying mechanism 92 drives the first sample box 7 to move a certain distance and then stops. Then, the second sample box 7 is conveyed to the fourth conveying mechanism 92, the fourth conveying mechanism 92 drives the first sample box 7 and the second sample box 7 to move a certain distance and then stops. In this way, the sample boxes 7 in the same row are filled from the input end to the output end of the fourth conveying mechanism 92.

[0052] Optionally, with reference to Figure 1The collecting mechanism is a screen 10, and a containing space 13 for containing the desiccant is formed between the screen 10 and the bottom of the box body 1. The desiccant can absorb the moisture in the box body 1, so as to avoid the problem that the weight of the cut tobacco sample box 7 is increased due to the cut tobacco absorbing the moisture in the box body 1, and the detection error of the moisture content of the cut tobacco is increased.

[0053] Optionally, referring to Figure 1 Two side doors 14 are arranged on the side wall of the box body 1, and the two side doors 14 correspond to the space above the screen 10 and the position of the containing space 13 respectively. An opening 15 is arranged on the side wall of the box body 1 at a position corresponding to each of the two side doors 14. In this embodiment, the side door 14 is arranged at the space above the screen 10, so that the sample box 7 can be taken out of the box body 1 conveniently. In this embodiment, the side door 14 is arranged at the containing space 13, so that the desiccant can be taken out and placed conveniently.

[0054] Although the utility model has been illustrated and described with reference to certain preferred embodiments, it should be understood by those skilled in the art that the above content is further detailed description of the utility model in combination with specific embodiments, and the specific implementation of the utility model cannot be limited to these descriptions. Those skilled in the art can make various changes in form and details, including making a number of simple deductions or replacements, without departing from the spirit and scope of the utility model.

Claims

1. A weighing device for weighing a tobacco sample box, characterized in that, The weighing device comprises: a box body, an inlet opening is arranged above the box body, and a cover is arranged at the inlet opening; a first conveying mechanism arranged in the box body, the first conveying mechanism is used for conveying the sample box; a weighing mechanism arranged at the output end of the first conveying mechanism, the weighing mechanism is used for weighing the sample box output by the first conveying mechanism; a first push plate arranged above the weighing mechanism, the first push plate is used for pushing the sample box on the weighing mechanism off the weighing mechanism; a control mechanism electrically connected to the output end of the weighing mechanism, the control mechanism is used for receiving the weight value of the sample box sent by the weighing mechanism, and after receiving the weight value, the control mechanism controls the first push plate to start, so that the first push plate pushes the sample box on the weighing mechanism off the weighing mechanism.

2. The weighing apparatus of claim 1 wherein, The first conveying mechanism comprises: a first conveying belt arranged below the inlet opening, the first conveying belt extends in a first direction; a second conveying belt extending in a second direction, the second direction is perpendicular to the first direction, the input end of the second conveying belt is close to the output end of the first conveying belt, and the weighing mechanism is arranged at the output end of the second conveying belt.

3. A weighing device as claimed in claim 2, characterized in that The outer surface of the sample box is marked with a box number, the inner side of the cover is provided with a box number identifier, when the cover is closed, the box number identifier is located above the weighing mechanism, and the identification end of the box number identifier faces the weighing mechanism, the box number identifier is electrically connected to the control mechanism, and the box number identifier is used for identifying the box number and sending the box number to the control mechanism.

4. A weighing device as claimed in claim 3, characterized in that Further comprising a first driving member, the first driving member is connected to the first push plate, and the first driving member is used to drive the first push plate to move, so that the sample box is pushed off the weighing mechanism.

5. Weighing apparatus according to any one of claims 1 to 4, characterized in that The weighing mechanism is an electronic balance.

6. The weighing apparatus of claim 4 wherein, Further comprising: a second conveying mechanism arranged on one side of the weighing mechanism, the first push plate can push the sample box on the weighing mechanism to the second conveying mechanism; a collection mechanism arranged in the box body, the collection mechanism is used for receiving the sample box output by the second conveying mechanism.

7. A weighing device as claimed in claim 6, characterized in that The collection mechanism is a screen, a containing space is formed between the screen and the bottom of the box body, and the containing space is used for containing a desiccant.

8. A weighing device as claimed in claim 7, characterized in that The second conveying mechanism comprises: a third conveying belt, the input end of the third conveying belt is close to the weighing mechanism, and the distance between the third conveying belt and the bottom of the box body gradually decreases in the conveying direction of the third conveying belt; a fourth conveying belt extending in the second direction, the input end of the fourth conveying belt is close to the output end of the third conveying belt, and the screen is arranged at the output end of the fourth conveying belt; a second push plate arranged above the fourth conveying belt, the second push plate is used for pushing the sample box on the fourth conveying belt to the screen.

9. A weighing device as claimed in claim 8, characterized in that Further comprising a second driving member, the second driving member is connected to the second push plate, and the second driving member is used to drive the second push plate to move.

10. A weighing device as claimed in claim 9, characterized in that The second push plate is provided with a pressure sensor, which is used to detect whether the side of the sample box away from the second push plate is in contact with the inner wall of the box or other sample boxes.

11. The weighing apparatus of claim 8 wherein, The first conveying belt, the second conveying belt, the third conveying belt and the fourth conveying belt are all provided with sensors, the sensors on the first conveying belt and the second conveying belt are used to detect whether the sample box exists on the conveying belt corresponding thereto, and the sensors on the third conveying belt and the fourth conveying belt are used to detect whether the sample box exists at the input end of the conveying belt corresponding thereto.

12. Weighing apparatus as claimed in any of the claims 7 to 11, characterized in that Two side doors are arranged on the side wall of the box, and the two side doors correspond to the space above the screen and the position of the containing space respectively.

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