Breakage resistance detection device for paper-plastic composite bag sample

Abstract

The invention discloses a breakage resistance detection device for a paper-plastic composite bag sample, and relates to the technical field of paper bag detection. The bag comprises a detachable bag structure, the detachable bag structure comprises a detachable bag body, and a lower containing room is arranged in the detachable bag body; the upper bag body is internally provided with an upper accommodating chamber, and the upper accommodating chamber is communicated with the lower accommodating chamber; the angle adjusting structure comprises an auxiliary chain, a transmission wheel and a supporting wheel; the bag opening tightening structure comprises a bag tightening sleeve and at least two bag tightening wheels, and the bag tightening sleeve is annular. By arranging the detachable bag structure, the angle adjusting structure, the bag opening tightening structure and the like, the bearing effect condition during lateral lifting of the composite bag is simulated according to actual requirements, the device is applied to detection of short composite bags, the detected bags are rich in size, detachable bag bodies are replaced, paper bag walls are truly clamped, shaking is not likely to happen during detection, and the detection efficiency is improved. And the detection data of the compressive strength of the damage-resistant material is more accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of paper bag detection, and specifically relates to a device for detecting the damage resistance of paper-plastic composite bag samples. Background Art

[0002] A paper-plastic composite bag, also known as a three-in-one composite paper bag, is composed of plastic and kraft paper. Usually, the plastic layer uses pp polypropylene as the base material, and the kraft paper uses refined composite special kraft paper. The two are bonded by melting plastic thermal lamination. The paper-plastic composite bag is more environmentally friendly than traditional plastic bags.

[0003] Generally, before the production of paper-plastic composite bags, it is necessary to detect the damage resistance of samples to meet the requirements of dropping, bumping, and load-bearing during transportation and storage. Moreover, after the original products of modern paper-plastic bags are used up, consumers will reuse the paper-plastic bags to hold other items. When holding other items, there will be many lifting situations. The effect of holding other items is a positive publicity for the quality of the original paper-plastic bag manufacturer.

[0004] Chinese Patent: CN114646544B discloses a device and method for detecting the load-bearing performance of packaging bags, including a frame. At the top of the frame, a load weighing device for vertical weighing is installed. The bottom weighing end of the load weighing device is connected to an inner bag support device. The frame is also equipped with a bag mouth clamping device for clamping the bag mouth end of the packaging bag (in this article: composite bag). In addition, it also includes an outward expansion drive assembly, a clamping drive mechanism, a clamping plate assembly, a flexible inner support sleeve, a telescopic rod, a clamping protrusion, etc.

[0005] The above patent can detect the load-bearing performance of each sampled packaging bag one by one, can quickly clamp the bag mouth of the packaging bag, gradually increase the weight load, and make the inner bag support device press and tighten and expand and extrude the packaging bag to simulate the bearing effect in the vertical direction during actual lifting.

[0006] However, this patent has the following defects: 1. It cannot simulate the bearing effect when the composite bag is pulled laterally; 2. Limited by the integration of the flexible inner support sleeve and the height of the telescopic rod, it cannot be applied to shorter composite bags, and the size of the composite bags to be inspected is relatively single; 3. The flexible inner support sleeve is not detachable and cannot be used for precise detection of fully fitting the curved surface composite bag; 4. Since the paper bag wall is relatively thin, the movable clamping plate, the fixed clamping plate, and the clamping protrusion generally cannot really clamp the paper bag wall. Therefore, a device for detecting the damage resistance of paper-plastic composite bag samples is proposed to solve the above problems. Summary of the Invention

[0007] The purpose of the present invention is to solve the following four problems: a packaging bag load-bearing performance detection device and a detection method in Chinese patent: CN114646544B cannot simulate the load-bearing effect when a composite bag is pulled from the side; cannot be applied to shorter composite bags, and the size of the composite bags under inspection is relatively single; cannot fully fit the accurate detection of curved composite bags; and cannot truly clamp the paper bag wall. The present invention provides a damage resistance detection device for paper-plastic composite bag samples.

[0008] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions: A damage resistance detection device for paper-plastic composite bag samples, comprising a detachable bag structure, the detachable bag structure comprising a detachable bag body, a lower storage room is arranged in the detachable bag body, and the lower enclosure of the detachable bag body is curved or square; an upper bag body, an upper storage room is arranged in the upper bag body, and the upper storage room is connected with the lower storage room; an angle adjustment structure, the angle adjustment structure comprises a secondary chain, a transmission wheel and a supporting wheel, an upper hole and a lower hole are opened on the secondary chain, a transmission tooth is connected to the transmission wheel, and the transmission tooth is meshed with the inner wall of the upper hole, and a supporting wheel tooth is connected to the supporting wheel, and the supporting wheel tooth is meshed with the inner wall of the lower hole The secondary chain is flexible and is located above the upper bag body; a bag tightening structure, the bag tightening structure includes a bag tightening sleeve and at least two bag tightening wheels, the bag tightening sleeve is annular, and there is a certain distance between the inner wall of the bag tightening sleeve and the outer surface of the upper bag body, which is used to set a bag tightening groove, each bag tightening wheel abuts against the outer wall of the composite bag, and makes the inner wall of the composite bag abut against the outer surface of the upper bag body; both ends of the secondary chain are connected to a first connecting rod and / or a second connecting rod, the first connecting rod is connected to the bag tightening sleeve, and a gap is provided between the first connecting rod and the second connecting rod, and the gap allows the first connecting rod and the second connecting rod to be sleeved on the side wall of the upper bag body.

[0009] Furthermore, at least two disassembly buckles are connected to one side of the detachable bag body close to the upper bag body, a buckle groove is provided on the upper bag body, a rod insertion hole is provided on the disassembly buckle, a telescopic rod is installed on the inner wall of the buckle groove, the disassembly buckle is embedded in the inner wall of the buckle groove, and the telescopic rod is inserted into the rod insertion hole.

[0010] Furthermore, a semi-open hole is provided on the disassembly buckle, and a sleeve rod is installed on the inner wall of the buckle groove. The semi-open hole is a semi-enclosed structure, and the sleeve rod is inserted into the semi-open hole through the unenclosed side of the semi-open hole.

[0011] Furthermore, the transmission teeth are meshedly connected with a power wheel, the power wheel is connected with a motor, the supporting wheel is located below the secondary chain, and the supporting wheel and the supporting wheel teeth support the weight of the secondary chain.

[0012] Furthermore, a through hole 1 is penetrated through the center of the supporting wheel, a lower shaft passes through the through hole 1, a connecting handle is fixedly connected to one end of the lower shaft, an upper shaft is fixedly connected to the side of the connecting handle close to the through hole, the upper shaft is parallel to the lower shaft, a through hole 2 is penetrated through the center of the transmission wheel, the upper shaft passes through the through hole 2, and the transmission wheel and the supporting wheel rotate respectively around the centers of the upper shaft and the lower shaft.

[0013] Furthermore, a position control rod is arranged between the auxiliary chain and the upper bag body. Both ends of the position control rod are connected to the auxiliary chain and / or the second connecting rod. A limiting groove is formed on the inner wall of the upper accommodating space. A limiting block is connected to the end of the second connecting rod far from the position control rod, and the limiting block slides on the limiting groove and is limited by the convex point on itself and the groove on the limiting groove.

[0014] Furthermore, a through hole 3 is penetrated through the center of the circumference of each bag tightening wheel, a through shaft passes through the inner wall of the through hole 3, and a side rod is connected to one end of the through shaft. The side rod is L-shaped.

[0015] Furthermore, a through shaft rod is connected to the end of the side rod far from the through shaft, and a spring is connected to the end of the through shaft rod far from the side rod.

[0016] Furthermore, a sliding plate is connected to the end of the spring far from the through shaft rod. A slot is formed on the surface of the bag tightening sleeve close to the upper bag body. The slot is V-shaped, one side inner wall is an inclined surface, and the included angle of the only inner wall is less than 90°. The sliding plate slides on the surface of the inclined surface.

[0017] Furthermore, a sleeve is sleeved outside the through shaft rod, an inner rod is connected to the sleeve, the inner rod is perpendicular to the sleeve, an outer cylinder is sleeved outside the inner rod, an air receiving pipe is installed at the end of the outer cylinder far from the through shaft rod, an adsorption hole is formed on the outer surface of the upper bag body, a ring channel is further formed in the upper bag body, the adsorption hole is communicated with the ring channel, the ring channel is further communicated with a connecting pipe, and the connecting pipe is communicated with an adsorption cylinder. The adsorption cylinder is located in the upper accommodating space.

[0018] The beneficial effects of the present invention are as follows: By setting a detachable bag structure, an angle adjustment structure, a bag mouth tightening structure, etc., the present invention overcomes many problems in the cited patents, can simulate the bearing action situation when side-lifting a composite bag, can be applied to the detection of relatively short composite bags, can detect composite bags with a relatively rich size range, can replace the detachable bag body according to actual needs to meet the accurate detection of fully fitting curved or square composite bags, can truly clamp the paper bag wall, is not easy to shake due to the composite bag during detection, resulting in inaccurate detection data, and the detection data of the compressive strength of the damage-resistant material is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the front view structural schematic diagram of the present invention; Figure 2 is the structural schematic diagram of part A in the present invention Figure 1 ; Figure 3 is the structural schematic diagram after the detachable bag body in the present invention is removed Figure 4 is the structural schematic diagram of part B in the present invention Figure 3 ; Figure 5 is the structural schematic diagram when the detachable bag body in the present invention is replaced with a square one Figure 6 is the partial structural schematic diagram in the side sectional view of the present invention Figure 7 is the partial structural schematic diagram in the top sectional view of the present invention Figure 8 is the structural schematic diagram of part C in the present invention Figure 7 ; Figure 9 is the structural schematic diagram without the position control rod in the present invention

[0020] Reference numerals: 1, detachable bag structure; 101, detachable bag body; 1011, lower accommodation space; 102, disassembly and assembly buckle; 103, closing buckle groove; 104, insertion rod hole; 105, telescopic rod; 106, semi-open hole; 107, sleeve rod; 2, angle adjustment structure; 201, secondary chain; 202, upper hole; 203, driving wheel; 204, driving teeth; 205, lower hole; 206, supporting wheel; 207, supporting wheel teeth; 208, force wheel; 209, motor; 210, lower shaft; 211, connecting handle; 212, upper shaft; 213, position control rod; 214, first connecting rod; 215, second connecting rod; 3, bag mouth tightening structure; 301, tightening bag sleeve; 302, tightening bag groove; 303, tightening bag wheel; 304, through shaft rod; 305, spring; 306, sliding plate; 307, slotted opening; 308, inclined plane; 309, inner rod; 310, outer cylinder; 311, connecting air pipe; 312, side rod; 313, housing; 314, adsorption hole; 315, adsorption cylinder; 4, upper bag body; 401, upper accommodation space; 402, limiting groove Detailed implementation manners

[0021] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations

[0022] Accordingly, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0023] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, the terms "first", "second", etc. are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.

[0024] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "inner", "outer", "upper", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is habitually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention.

[0025] A device for detecting the resistance to breakage of a paper-plastic composite bag sample, comprising a bag-opening structure 1, the bag-opening structure 1 including a bag-opening body 101, a lower accommodation chamber 1011 is provided inside the bag-opening body 101, and the lower enclosure of the bag-opening body 101 is curved or square; an upper bag body 4, an upper accommodation chamber 401 is provided inside the upper bag body 4, and the upper accommodation chamber 401 is communicated with the lower accommodation chamber 1011; an angle-adjusting structure 2, the angle-adjusting structure 2 including a sub-chain 201, a transmission wheel 203 and a supporting wheel 206, upper holes 202 and lower holes 205 are provided on the sub-chain 201, a transmission tooth 204 is connected to the transmission wheel 203, the transmission tooth 204 meshes with the inner wall of the upper hole 202, a supporting tooth 207 is connected to the supporting wheel 206, and the supporting tooth 207 meshes with the inner wall of the lower hole 205. The sub-chain 201 is flexible and is located above the upper bag body 4; a bag-mouth tightening structure 3, the bag-mouth tightening structure 3 including a tightening sleeve 301 and at least two tightening wheels 303, the tightening sleeve 301 is annular, and there is a certain distance between the inner wall of the ring of the tightening sleeve 301 and the outer surface of the upper bag body 4 for arranging a tightening groove 302. Each tightening wheel 303 abuts against the outer wall of the composite bag and makes the inner wall of the composite bag abut against the outer surface of the upper bag body 4; both ends of the sub-chain 201 are connected with a first connecting rod 214 and / or a second connecting rod 215, the first connecting rod 214 is connected to the tightening sleeve 301, and there is a gap between the first connecting rod 214 and the second connecting rod 215, and the gap allows the first connecting rod 214 and the second connecting rod 215 to be sleeved on the side wall of the upper bag body 4.

[0026] Such as Figure 4As shown in the figure, at least two disassembly and assembly buckles 102 are connected to one side of the detachable bag body 101 close to the upper bag body 4. A buckle slot 103 is formed on the upper bag body 4. An insertion rod hole 104 is formed on the disassembly and assembly buckle 102. A telescopic rod 105 is installed on the inner wall of the buckle slot 103. The disassembly and assembly buckle 102 is fitted to the inner wall of the buckle slot 103, and the telescopic rod 105 is inserted into the insertion rod hole 104. The telescopic rod 105 has an elastic setting. When the insertion rod hole 104 abuts against the outer wall of the telescopic rod 105, the telescopic rod 105 can be shortened inward, and then the disassembly and assembly buckle 102 is slowly moved. When the elastic setting in the telescopic rod 105 resumes stretching, the telescopic rod 105 becomes longer and is inserted into the insertion rod hole 104. When the telescopic rod 105 is inserted into the insertion rod hole 104, the position between the disassembly and assembly buckle 102 and the buckle slot 103 is restricted.

[0027] As Figure 4 shown, a semi-open hole 106 is also formed on the disassembly and assembly buckle 102. A sleeve rod 107 is also installed on the inner wall of the buckle slot 103. The semi-open hole 106 is in a semi-enclosed structure. The sleeve rod 107 is inserted into the semi-open hole 106 through the non-enclosed side of the semi-open hole 106. Before the telescopic rod 105 is inserted into the insertion rod hole 104, the inner wall of the semi-open hole 106 can be sleeved on the outer wall of the sleeve rod 107. On the one hand, the disassembly and assembly buckle 102 is restricted by the limiting mechanisms on both the upper and lower sides, more stably restricting the position between the disassembly and assembly buckle 102 and the buckle slot 103. On the other hand, when the semi-open hole 106 cannot be well sleeved on the sleeve rod 107, the insertion rod hole 104 can be sleeved on the telescopic rod 105 for a limiting effect, and vice versa.

[0028] As Figure 2 shown, the driving gear 204 is meshed and connected with a force wheel 208. The force wheel 208 is connected with a motor 209. The supporting wheel 206 is located below the auxiliary chain 201. The supporting wheel 206 and the supporting wheel teeth 207 support the weight of the auxiliary chain 201. The motor 209 drives the force wheel 208 to rotate. The force wheel 208 drives the transmission wheel 203 to rotate. The transmission wheel 203 drives the auxiliary chain 201 to rotate. Finally, the first connecting rod 214 and / or the second connecting rod 215 connected to the auxiliary chain 201 rotate, and the lower tightening bag sleeve 301, the upper bag body 4 and the detachable bag structure 1 rotate by a certain angle. At this time, a rope (not shown in the figure) or a force is still needed to connect the upper bag body 4 or the detachable bag structure 1, and the upper bag body 4 or the detachable bag structure 1 is gently lifted to keep it stable after rotating by a certain angle.

[0029] As Figure 2As shown, a through hole is provided at the center of the supporting wheel 206. A lower shaft 210 passes through the through hole. One end of the lower shaft 210 is fixedly connected with a connecting handle 211. A upper shaft 212 is fixedly connected to the side of the connecting handle 211 close to the through hole. The upper shaft 212 is parallel to the lower shaft 210. A through hole is provided at the center of the driving wheel 203. The upper shaft 212 passes through the through hole. The driving wheel 203 and the supporting wheel 206 rotate respectively around the centers of the upper shaft 212 and the lower shaft 210. The secondary chain 201 also drives the lower supporting wheel 206 to rotate. On the one hand, the supporting wheel 206 rotates accordingly. On the other hand, it can stabilize the rotation speed and rhythm of the secondary chain 201, and the supporting wheel 206 can support the weight of the secondary chain 201. In addition, the supporting wheel 206 is supported by the lower shaft 210, the connecting handle 211 and the upper shaft 212 so as not to fall. At this time, the motor 209, the force wheel 208 and the driving wheel 203 can all be connected by the mechanism above and have an upward pulling force. This part is not drawn in this figure.

[0030] As Figure 1 , 6 shown, a position control rod 213 is provided between the secondary chain 201 and the upper bag body 4. Both ends of the position control rod 213 are connected to the secondary chain 201 and / or the second connecting rod 215. A limiting groove 402 is provided on the inner wall of the upper accommodating space 401. One end of the second connecting rod 215 away from the position control rod 213 is connected with a limiting block. The limiting block slides on the limiting groove 402 and is limited by the convex point on itself and the groove on the limiting groove 402. When it is necessary to move all the structures of the above invention to another mechanism or to another position for use, the position control rod 213 can be held by hand to lift all the structures in the above invention. And due to the limiting and sliding relationship between the limiting groove 402 and the convex point in the second connecting rod 215, the second connecting rod 215 can move up and down and drive the upper bag body 4 to rotate by a certain angle.

[0031] As Figure 8 shown, a through hole is provided at the center of the circumference of each tight bag wheel 303. A through shaft passes through the inner wall of the through hole. One end of the through shaft is connected with a side rod 312. The side rod 312 is L-shaped. The tight bag wheel 303 contacts the outer wall of the measured composite bag. The side rod 312 determines the position of the tight bag wheel 303.

[0032] As Figure 8 shown, one end of the side rod 312 away from the through shaft is connected with a through shaft rod 304. One end of the through shaft rod 304 away from the side rod 312 is connected with a spring 305. The spring 305 transmits a certain force towards the tight bag wheel 303, so that the tight bag wheel 303 will not press rigidly on the outer wall of the composite bag, avoiding the tight bag wheel 303 from not rotating due to the rigid force.

[0033] As Figure 8As shown, one end of the spring 305 away from the through-axis rod 304 is connected to a sliding plate 306. A slot 307 is formed on the surface of the tight bag sleeve 301 close to the upper bag body 4. The slot 307 is V-shaped, with one inner wall being an inclined surface 308, and the included angle of the only inner wall is less than 90°. The sliding plate 306 slides on the surface of the inclined surface 308. The sliding plate 306 contacts the inclined surface 308 to prevent the spring 305 from directly contacting the inclined surface 308, which may damage the inclined surface 308 and sometimes the spring 305 may also get stuck on the inclined surface 308. Therefore, the sliding plate 306 is provided. The inclined surface 308 finally makes the tight bag wheel 303 rotate upwards and get closer to the outer wall of the upper bag body 4, that is, the higher it goes, the greater the pressing force on the composite bag, and it is also better to adjust the pressing force.

[0034] As Figure 6 , 8 As shown, a housing 313 is sleeved outside the through-axis rod 304. An inner rod 309 is connected to the housing 313. The inner rod 309 is perpendicular to the housing 313. An outer cylinder 310 is sleeved outside the inner rod 309. One end of the outer cylinder 310 away from the through-axis rod 304 is installed with an air intake pipe 311. An adsorption hole 314 is formed on the outer surface of the upper bag body 4. A ring channel is also formed inside the upper bag body 4. The adsorption hole 314 is communicated with the ring channel. The ring channel is also communicated with a connecting pipe, and the connecting pipe is communicated with an adsorption cylinder 315. The adsorption cylinder 315 is located in the upper accommodation space 401. The air intake pipe 311 is externally connected to a pneumatic mechanism, which can give the inner rod 309 a force to slide far and near, and drive the housing 313, as well as the through-axis rod 304 and the tight bag wheel 303 inside the housing 313 to move up or down. In this way, it is no longer necessary to operate manually. And under the action of the adsorption force of the adsorption cylinder 315 and the adsorption hole 314, the inner wall of the composite bag fits more closely to the outer wall of the upper bag body 4.

[0035] Embodiment: When it is necessary to simulate the material compressive strength when the composite bag is lifted vertically, that is, the weight is slowly increased into the detachable bag body 101. The composite bag is sleeved outside the detachable bag body 101 until the bottom of the composite bag is damaged when the maximum degree is reached. It is known that the material compressive strength P = C * S / A, where C is the maximum bearing capacity N (Newton), P is the material compressive strength N / m² (Newton per square meter), A is the stress area m² (square meter), and S is the safety factor, usually taken as 2 - 5. For example, when testing the static load-bearing capacity of a single-layer composite PE bag with dimensions of 0.5m × 0.3m (meter) and a thickness of 20μm (micrometer) and a density of 0.95g / cm³ (gram per cubic centimeter), A = 0.5m × 0.3m, and the safety factor is taken as 2.5, that is, S = 2.5. The maximum bearing capacity: C = G gravity = m * g, where g is the gravity coefficient = 9.8N / kg (Newton per kilogram), and m is the mass (kg) = 5kg. That is, when the composite bag is damaged at the bottom when it reaches 5kg, then P = 5kg * 9.8N / kg * 2.5 / 0.5m * 0.3m. At this time, P = 816.67N / m² (Newton per square meter), which is the measured data; In addition, when simulating the compressive strength of the material when the composite bag is lifted from the simulation side, i.e., when the heavy object is slowly added to the detachable bag body 101, the composite bag is sleeved outside the detachable bag body 101 until the bottom of the composite bag is damaged at the maximum addition. The difference is that at this time, the gravity G = C is decomposed into two components, the vertical component Fn = mg * cosθ, and the horizontal component Ft = mg * sinθ, where θ is the angle between the plane and the horizontal plane. By measuring m at the time of damage, the final P value can be measured; When actually operating the device of the present invention, the operation process is as follows: When measuring the weight of the composite bag when it is lifted vertically until it is damaged, if the bottom inner wall of the composite bag is a curved surface, the detachable bag body 101 with a curved surface can be used. On the one hand, the inner wall of the insertion rod hole 104 is sleeved on the outer wall of the telescopic rod 105, and the inner wall of the semi-open hole 106 is sleeved on the outer wall of the sleeve rod 107 to maintain the stability of the upper and lower positions of the disassembly and assembly buckle 102. On the other hand, the bottom inner wall of the composite bag is well attached to the outer wall of the detachable bag body 101 with a curved surface. At this time, heavy objects (sand or other small granular substances with a certain weight) are added to the detachable bag body 101. Since the detachable bag body 101 is made of a soft and elastic material, it can hold the added heavy objects and transfer the weight to the composite bag attached to the outer wall, that is, the composite bag can stably bear the gravity. If there is no detachable bag body 101, the heavy objects will directly contact the composite bag, and the disadvantages are as follows: First, it limits the fully enclosed bag shape of the composite bag (perforated composite bags cannot participate in such tests). Second, when the composite bag is damaged, the heavy objects will fall out, and the heavy objects will be severely damaged. Third, it is not easy to recycle the heavy objects, and the heavy objects will inevitably stick to the bottom inner wall of the composite bag, resulting in serious damage to the heavy objects and being unfavorable for subsequent detection of other samples. If the bottom of the composite bag is square, the same is true above. When measuring, the bag mouth of the composite bag should be inserted into the tight bag groove 302 between the tight bag sleeve 301 and the upper bag body 4. At this time, the air inlet pipe 311 is externally connected to a pneumatic mechanism, and a certain amount of air is supplied to the air inlet pipe 311 to push the inner rod 309 to slide on the inner wall of the outer cylinder 310 and drive the upward movement of the spring 305, the slide plate 306, the through shaft rod 304, the tight bag wheel 303, and the side rod 312. The slide plate 306 slides on the surface of the inclined surface 308. Since the inclined surface 308 slowly approaches the upper bag body 4 upward, several tight bag wheels 303 slowly approach the upper bag body 4, prompting the upper bag body 4 to press the outer wall of the composite bag, making the inner wall of the composite bag more closely attached to the outer wall of the upper bag body 4. In addition, the adsorption cylinder 315 generates an adsorption force, and adsorbs the inner wall of the composite bag through the adsorption hole 314, so that the inner wall of the composite bag is more stably held in a pressed state after being attached to the outer wall of the upper bag body 4. At this time, the composite bag will no longer shake or fall downward, ensuring the accuracy of the data when measuring the composite bag.

[0036] Finally, the process of the side lifting operation is as follows: Start the motor 209. The motor 209 drives the power wheel 208 to mesh with the transmission teeth 204 in a clockwise or counterclockwise direction, causing the transmission wheel 203 to rotate. The transmission wheel 203 drives the secondary chain 201 to rotate. The secondary chain 201 drives the first connecting rod 214, the second connecting rod 215, and the position control rod 213 to rotate. The limiting block and bump below the second connecting rod 215 drive the limiting groove 402 and the upper bag body 4 to rotate. The upper bag body 4 is connected to the detachable bag body 101 and can also drive the detachable bag body 101 to rotate. In this way, when the composite bag is attached to the surface of the detachable bag body 101, the composite bag is inclined at this time to form an inclined angle with the ground within 90°. The force received during the side lifting of the composite bag can be simulated to detect the maximum bearing mass of the composite bag during side lifting. Side lifting is widely used in actual scenarios. For example, when putting the purchased items in the composite bag and there is not enough space in front of the motorcycle or electric vehicle, and it is necessary to place the composite bag obliquely on the hook of the motorcycle or electric vehicle, it is inevitable that there will be a force on the side lifting. If the composite bag can bear a large weight during side lifting, then this bag can be used more widely and effectively.

[0037] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, various changes and improvements will occur to the present invention, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A damage resistance testing device for paper-plastic composite bag samples, characterized in that: include A detachable bag structure (1), the detachable bag structure (1) comprising a detachable bag body (101), a lower accommodation space (1011) being arranged inside the detachable bag body (101), and the lower enclosure of the detachable bag body (101) being in a curved or square shape; An upper bag body (4), wherein an upper accommodating room (401) is provided in the upper bag body (4), and the upper accommodating room (401) is connected to the lower accommodating room (1011); An angle adjustment structure (2), the angle adjustment structure (2) comprising a secondary chain (201), a transmission wheel (203) and a supporting wheel (206); an upper hole (202) and a lower hole (205) are provided on the secondary chain (201); a transmission tooth (204) is connected to the transmission wheel (203); the transmission tooth (204) meshes with the inner wall of the upper hole (202); a supporting wheel tooth (207) is connected to the supporting wheel (206); the supporting wheel tooth (207) meshes with the inner wall of the lower hole (205); the secondary chain (201) is flexible and is located above the upper bag body (4); A bag-tightening structure (3), the bag-tightening structure (3) comprising a bag-tightening sleeve (301) and at least two bag-tightening wheels (303), the bag-tightening sleeve (301) being annular, a certain distance between the inner wall of the ring of the bag-tightening sleeve (301) and the outer surface of the upper bag body (4) for setting a bag-tightening groove (302), each bag-tightening wheel (303) abutting against the outer wall of the composite bag, and making the inner wall of the composite bag abut against the outer surface of the upper bag body (4); Both ends of the secondary chain (201) are connected to a first connecting rod (214) and / or a second connecting rod (215); the first connecting rod (214) is connected to the tight bag sleeve (301); a gap is provided between the first connecting rod (214) and the second connecting rod (215); the gap enables the first connecting rod (214) and the second connecting rod (215) to be sleeved on the side wall of the upper bag body (4).

2. The damage resistance detection device for paper-plastic composite bag samples according to claim 1 is characterized in that: At least two disassembly buckles (102) are connected to a side of the detachable bag body (101) close to the upper bag body (4); a buckle groove (103) is provided on the upper bag body (4); a rod insertion hole (104) is provided on the disassembly buckle (102); a telescopic rod (105) is installed on the inner wall of the buckle groove (103); the disassembly buckle (102) is embedded in the inner wall of the buckle groove (103), and the telescopic rod (105) is inserted into the rod insertion hole (104).

3. The damage resistance detection device for paper-plastic composite bag samples according to claim 2 is characterized in that: The disassembly buckle (102) is also provided with a semi-open hole (106), and a sleeve rod (107) is also installed on the inner wall of the locking groove (103). The semi-open hole (106) is in a semi-enclosed structure, and the sleeve rod (107) is inserted into the semi-open hole (106) through the unenclosed side of the semi-open hole (106).

4. The damage resistance detection device for paper-plastic composite bag samples according to claim 1, characterized in that: The transmission teeth (204) are meshedly connected to a force wheel (208), the force wheel (208) is connected to a motor (209), the support wheel (206) is located below the secondary chain (201), and the support wheel (206) and the support wheel teeth (207) support the weight of the secondary chain (201).

5. The damage resistance detection device for paper-plastic composite bag samples according to claim 1 is characterized in that: A through hole is passed through the center of the circle of the supporting wheel (206), a lower shaft (210) is passed through the through hole, one end of the lower shaft (210) is connected and fixedly connected to a connecting handle (211), a side of the connecting handle (211) close to the through hole is connected and fixedly connected to an upper shaft (212), the upper shaft (212) is parallel to the lower shaft (210), two through holes are passed through the center of the circle of the transmission wheel (203), the upper shaft (212) passes through the two through holes, and the transmission wheel (203) and the supporting wheel (206) rotate about the center of the circle of the upper shaft (212) and the lower shaft (210), respectively.

6. The damage resistance detection device for paper-plastic composite bag samples according to claim 1, characterized in that: A control rod (213) is provided between the secondary chain (201) and the upper bag body (4); both ends of the control rod (213) are connected to the secondary chain (201) and / or the second connecting rod (215); a limiting groove (402) is provided on the inner wall of the upper accommodation room (401); one end of the second connecting rod (215) away from the control rod (213) is connected to a limiting block; the limiting block slides on the limiting groove (402) and limits the position of the limiting block with a convex point on the limiting groove (402) and a concave groove on the limiting groove (402).

7. The damage resistance detection device for paper-plastic composite bag samples according to claim 1 is characterized in that: The circumferential center of each bag tightening wheel (303) is penetrated by three through holes, and a through shaft passes through the inner wall of the three through holes, and one end of the through shaft is connected to a side rod (312), and the side rod (312) is L-shaped.

8. The damage resistance detection device for paper-plastic composite bag samples according to claim 7, characterized in that: One end of the side rod (312) away from the through-axis is connected to a through-axis rod (304), and one end of the through-axis rod (304) away from the side rod (312) is connected to a spring (305).

9. The damage resistance detection device for paper-plastic composite bag samples according to claim 8, characterized in that: The end of the spring (305) away from the through-axis rod (304) is connected to a slide plate (306); a surface of the tight bag sleeve (301) on one side close to the upper bag body (4) is provided with a groove (307); the groove (307) is V-shaped, one inner wall of which is an inclined surface (308), and the angle of the only inner wall is less than 90 degrees; the slide plate (306) slides on the surface of the inclined surface (308).

10. The damage resistance detection device for paper-plastic composite bag samples according to claim 9, characterized in that: The through-axis rod (304) is provided with a sleeve shell (313) on its outer sleeve, and an inner rod (309) is connected to the sleeve shell (313). The inner rod (309) and the sleeve shell (313) are in a vertical relationship. The inner rod (309) is provided with an outer cylinder (310) on its outer sleeve, and an air connection pipe (311) is installed at one end of the outer cylinder (310) away from the through-axis rod (304). An adsorption hole (314) is provided on the outer surface of the upper bag body (4). An annular channel is also provided in the upper bag body (4). The adsorption hole (314) is connected to the annular channel. The annular channel is also connected to a connecting pipe. The connecting pipe is connected to an adsorption cylinder (315). The adsorption cylinder (315) is located in the upper accommodation chamber (401).

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