A weighing device for a net weight packaging machine

Abstract

The present invention relates to a weighing device for a net weight packaging machine, belonging to the technical field of packaging weighing. It comprises a weighing box, wherein both sides of the top surface of the weighing box are provided with inwardly concave rectangular structure sensor installation compartments, the top of the sensor installation compartment is movably connected with a sealing cover, a weighing sensor is installed in each of the sensor installation compartments, a force transmission beam is horizontally arranged on the top of the weighing sensor, the two ends of the force transmission beam are connected to the top of the force transmission rod with adjustable length, a weighing bucket is also suspended in the weighing box, the two sides of the weighing bucket are respectively connected to the bottom of the force transmission rod, and a self-locking angle valve mechanism is also arranged at the bottom of the weighing bucket.

Description

Technical Field

[0001] The invention relates to a weighing device of a net weight packaging machine, belonging to the technical field of packaging weighing. Background Art

[0002] Packaging machinery can complete all the processes from bag taking, bag opening, bagging, filling, sealing, coding, boxing, stacking and winding. On the one hand, it can effectively reduce labor costs for packaging small-scale and large-volume products. On the other hand, it can also avoid bacterial contamination caused by manual operation, which is suitable for the packaging of food products.

[0003] As a weighing mechanism in the packaging machine, high precision and high efficiency are required to achieve weighing. However, the weighing device in the traditional net weight packaging machine is Figure 1 Most of the weighing sensors are installed on the top of the weighing box. This method will affect the installation of the feeding device, and the protection of the sensor is weak, which can easily affect the weighing accuracy of the sensor. In addition, the air pipe cable wiring of the traditional weighing device is exposed, which is easy to be damaged by touch and affects the appearance.

[0004] In view of the above-mentioned defects, the designer actively conducts research and innovation in order to create a weighing device for a net weight packaging machine to make it more valuable for industrial use. Summary of the invention

[0005] In order to solve the above technical problems, the purpose of the present invention is to provide a weighing device for a net weight packaging machine. The weighing device of the present invention is provided with a sensor installation compartment inside the top surface of the box, and the sensor is installed in a sealed compartment to avoid external interference and damage, thereby improving the weighing accuracy. At the same time, the built-in hidden installation will not affect the setting of the top feed port. A wiring tube is designed in the box for placing the sensor cable to avoid damage and improve the aesthetics. The weighing hopper is hoisted by a force transmission rod with an adjustable length, so that the sensor is more evenly stressed and the weighing accuracy is improved. In addition, the present invention uses a self-locking angle valve mechanism to reduce the space occupied by the cylinder, making the hopper door more reliable to close. The inner corners of the box and the weighing hopper are both chamfered, which is not easy to stick to the material, and has broad application prospects.

[0006] A weighing device for a net weight packaging machine of the present invention comprises a weighing box,

[0007] Both sides of the top surface of the weighing box are provided with concave rectangular sensor installation compartments, and the top of the sensor installation compartment is movably connected with a sealing cover, and a weighing sensor is installed in each of the sensor installation compartments, and a force transmission beam is horizontally arranged on the top of the weighing sensor, and both ends of the force transmission beam are connected to the top of the force transmission rod with adjustable length. A weighing bucket is also suspended inside the weighing box, and both sides of the weighing bucket are respectively connected to the bottom of the force transmission rod, and a self-locking angle valve mechanism is also arranged at the bottom of the weighing bucket.

[0008] Furthermore, the force transmission rod extends into the inner cavity of the weighing box through a circular hole reserved at the bottom of the sensor installation compartment. There are four force transmission rods in total, one of which is connected to each end of the force transmission beam on each side of the top of the weighing box.

[0009] Furthermore, the length of the force transmission rod can be adjusted, so that the force on the weighing sensor is more uniform and the weighing accuracy is improved.

[0010] Furthermore, a soft connection seal is provided between the force transmission rod and the circular hole reserved at the bottom of the sensor installation compartment, and the soft connection seal is coated on the outer surface of the force transmission rod.

[0011] Furthermore, the four corners of the weighing box and the weighing bucket are respectively provided with box chamfers and weighing bucket chamfers, and the box chamfers and the weighing bucket chamfers both adopt a large chamfer structure, and the side angle of the large chamfer is an obtuse angle of 135°, which is less likely to stick to the material than a 90° right angle, and can also improve the weighing accuracy.

[0012] Furthermore, the weighing box is a box structure that penetrates from top to bottom.

[0013] Furthermore, a feed port is provided on the top of the weighing box, for external materials to be weighed to enter the weighing bucket inside the weighing box.

[0014] Furthermore, the center position of the force transmission beam is connected to a weighing sensor.

[0015] Furthermore, a wiring tube is provided inside the weighing box for arranging cables and air pipes such as sensor cables and induction switches.

[0016] Furthermore, the weighing bucket can be configured as a flat bottom structure or a conical bottom structure.

[0017] By means of the above scheme, the present invention has at least the following advantages:

[0018] (1) The weighing box of the present invention is designed with two sensor installation compartments, and the weighing sensor is installed in the sealed sensor installation compartment to avoid external interference and damage, thereby improving the weighing accuracy. At the same time, the built-in hidden installation will not affect the setting of the top feed port;

[0019] (2) The weighing box of the present invention is designed with a wiring tube for arranging cables and air pipes such as sensor cables and induction switches, thereby avoiding external damage to the cables and improving the aesthetics;

[0020] (3) The present invention connects the weighing sensor through four force transmission rods with adjustable transmission lengths, and weighs the symmetrical weight bucket, so that the force on the sensor is more uniform and the weighing accuracy is improved;

[0021] (4) The force transmission rod of the present invention is also equipped with a double soft sealing protective cover, which can keep the force transmission rod in a sealed state, avoid interference from external factors, and improve weighing accuracy;

[0022] (5) The four inner corners of the weighing box and the weighing bucket of the present invention all adopt a large chamfer structure, and the side angle of the large chamfer is an obtuse angle of 135°, which is less likely to stick to the material than a 90° right angle;

[0023] (6) The present invention uses a self-locking angle valve mechanism to reduce the space occupied by the cylinder, making the hopper door more reliable to close.

[0024] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show a certain embodiment of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a schematic diagram of the weighing device structure of a traditional net weight packaging machine;

[0027] Figure 2 It is a front view of the weighing device of the net weight packaging machine of the present invention;

[0028] Figure 3 is a side view of a weighing device of a net weight packaging machine of the present invention;

[0029] Figure 4 is a top view of a weighing device of a net weight packaging machine of the present invention;

[0030] Among them, in the figure,

[0031] 1. Weighing box; 2. Weighing bucket; 3. Sensor installation compartment; 4. Weighing sensor; 5. Force transmission beam; 6. Force transmission rod; 7. Soft connection seal; 8. Feed inlet; 9. Self-locking angle valve mechanism; 10. Sealing cover; 11. Box chamfer; 12. Weighing bucket chamfer. DETAILED DESCRIPTION

[0032] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0033] See also Figures 2 to 4 A weighing device for a net weight packaging machine according to a preferred embodiment of the present invention comprises a weighing box 1, wherein the weighing box 1 is a box structure that is connected from top to bottom, and is characterized in that:

[0034] A feed port 8 is provided on the top of the weighing box 1 for external materials to be weighed to enter the weighing bucket 2 inside the weighing box. Both sides of the top surface of the weighing box 1 are provided with concave rectangular structure sensor installation compartments 3. The top of the sensor installation compartment 3 is movably connected with a sealing cover 10. The sealing cover 10 is used to cover the sensor installation compartment 3 to form a closed structure. A weighing sensor 4 is installed in each of the sensor installation compartments 3. The weighing sensor 4 is arranged inside the sealed sensor installation compartment 3 to avoid external interference and damage, thereby improving the weighing accuracy. At the same time, the built-in hidden installation will not affect the setting of the top feeding device. A force transmission beam 5 is horizontally arranged on the top of the weighing sensor 4. The center position of the force transmission beam 5 is connected to the weighing sensor 4, and the two ends of the force transmission beam 5 are connected to the top of the force transmission rod 6 with adjustable length. The force transmission rod 6 extends from the circular hole reserved at the bottom of the sensor installation compartment 3 into the inner cavity of the weighing box 1. There are four force transmission rods 6, one of which is connected to each end of the force transmission beam 5 on each side of the top of the weighing box 1. A weighing bucket 2 is also suspended in the weighing box 1. The two sides of the weighing bucket 2 are respectively connected to the bottom of the force transmission rod 6 on the force transmission beams 5 on both sides of the top of the weighing box 1, so as to be suspended and fixed in the inner cavity of the weighing box 1. The length of the force transmission rod 6 can be adjusted, so that the force on the weighing sensor 4 is more evenly applied and the weighing accuracy is improved. A soft connection seal 7 is also provided between the force transmission rod 6 and the circular hole reserved at the bottom of the sensor installation compartment 3. The soft connection seal 7 is coated on the outer surface of the force transmission rod 6. The soft connection seal 7 can keep the force transmission rod in a sealed state to avoid interference from external factors and improve the weighing accuracy.

[0035] The weighing box 1 is also provided with a wiring tube inside, which is used for arranging cables such as sensor cables, induction switches, and air pipes, so as to avoid external damage to the cables and improve the aesthetics;

[0036] The four corners of the weighing box 1 and the weighing bucket 2 are respectively provided with box chamfers 11 and weighing bucket chamfers 12. The box chamfers 11 and weighing bucket chamfers 12 both adopt a large chamfer structure. The side angle of the large chamfer is an obtuse angle of 135°. Compared with a 90° right angle, it is not easy to stick to the material and can also improve the weighing accuracy.

[0037] A self-locking angle valve mechanism 9 is provided at the bottom of the weighing hopper 2, and the self-locking angle valve mechanism 9 reduces the space occupied by the cylinder, making the hopper door more reliable to close;

[0038] The weighing hopper 2 can be set to a flat bottom structure or a conical bottom structure. The flat bottom weighing hopper 2 has a good sealing effect and is more suitable for weighing relatively fine materials. The conical bottom weighing hopper has a small door panel rotation angle when opening the door, and the opening and closing speed is fast, which is more suitable for high-speed packaging.

[0039] The working principle of the present invention is as follows:

[0040] When the weighing device of the net weight packaging machine of the present invention is actually used, the material to be weighed enters from the feed port 8 on the top of the weighing box 1 and falls into the weighing bucket 2 in the inner cavity of the weighing box 1. At this time, the self-locking angle valve mechanism 9 at the bottom of the weighing bucket 2 is in a closed state. Then the weighing bucket 2 transmits the material gravity through the force transmission beam 5 to the weighing sensor 4 through the force transmission pull rods 6 on both sides for weighing. After reading the weighing value, the self-locking angle valve mechanism 9 at the bottom of the weighing bucket 2 is opened, allowing the material to fall into the subsequent packaging process. The weighing device of the present invention is provided with a sensor installation compartment 3 inside the top surface of the weighing box 1, and the weighing sensor 4 is installed in the sealed sensor installation compartment 3 to avoid external interference and damage, thereby improving the weighing accuracy. At the same time, the built-in hidden installation will not affect the setting of the top feed port. A wiring tube is designed in the box body for placing the sensor cable to avoid damage and improve the aesthetics. The weighing hopper 2 is hoisted to make the load cell 4 more evenly stressed and improve the weighing accuracy. In addition, the present invention uses a self-locking angle valve mechanism 9 to reduce the space occupied by the cylinder, making the hopper door more reliable to close. The inner corners of the weighing box 1 and the weighing hopper 2 are both chamfered, which is not easy to stick to the material, and has broad application prospects.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A weighing device for a net weight packaging machine, comprising a weighing box (1), characterized in that: The top surface of the weighing box (1) is provided with concave rectangular sensor installation compartments (3) on both sides, and the top of the sensor installation compartment (3) is movably connected to a sealing cover (10). A weighing sensor (4) is installed in each of the sensor installation compartments (3). A force transmission beam (5) is horizontally arranged on the top of the weighing sensor (4). The two ends of the force transmission beam (5) are connected to the top of a force transmission rod (6) with an adjustable length. A weighing bucket (2) is also suspended in the weighing box (1). The two sides of the weighing bucket (2) are respectively connected to the force transmission rod (6) bottom connection, the bottom of the weighing bucket (2) is also provided with a self-locking angle valve mechanism (9); the length of the force transmission rod (6) can be adjusted; a soft connection seal (7) is also provided between the force transmission rod (6) and the circular hole reserved at the bottom of the sensor installation compartment (3), and the soft connection seal (7) is coated on the outer surface of the force transmission rod (6); the top of the weighing box (1) is provided with a feed port (8) for external materials to be weighed to enter the weighing bucket (2) inside the weighing box; the center position of the force transmission beam (5) is connected to the weighing sensor (4).

2. The weighing device of a net weight packaging machine according to claim 1, characterized in that: The force transmission rod (6) extends from a circular hole reserved at the bottom of the sensor installation compartment (3) into the inner cavity of the weighing box (1). There are four force transmission rods (6) in total, one of which is connected to each end of the force transmission beam (5) on each side of the top of the weighing box (1).

3. The weighing device of a net weight packaging machine according to claim 1, characterized in that: The four corners of the weighing box (1) and the weighing bucket (2) are respectively provided with box chamfers (11) and weighing bucket chamfers (12), and both the box chamfers (11) and the weighing bucket chamfers (12) adopt a large chamfer structure, and the side angle of the large chamfer is an obtuse angle of 135 degrees.

4. The weighing device of a net weight packaging machine according to claim 1, characterized in that: The weighing box (1) is a box structure that penetrates from top to bottom.

5. The weighing device of a net weight packaging machine according to claim 1, characterized in that: A wiring tube is also provided inside the weighing box (1).

6. The weighing device of a net weight packaging machine according to claim 1, characterized in that: The weighing bucket (2) is configured as a flat bottom structure or a conical bottom structure.

Images