CN110646122B - Detection device for packing belt of outer package - Google Patents
Detection device for packing belt of outer package Download PDFInfo
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- CN110646122B CN110646122B CN201810665958.0A CN201810665958A CN110646122B CN 110646122 B CN110646122 B CN 110646122B CN 201810665958 A CN201810665958 A CN 201810665958A CN 110646122 B CN110646122 B CN 110646122B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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Abstract
The invention relates to the technical field of measuring of packing belts, and particularly provides a detection device for an external packing belt. The invention aims to solve the problem of large reading error in the conventional packing belt tightness detection mode. For this purpose, the detection device of the invention comprises a pressing mechanism and a stretching mechanism, wherein under the condition that the pressing mechanism presses the outer package, the stretching mechanism can move the packing belt relative to the outer package in the direction away from the outer package under the action of external force; the detection device is also provided with a measuring mechanism which can measure the stretching length and the pulling force of the packing belt relative to the outer package through the movement. According to the invention, the accurate measurement of the two parameters of the tension and the stretching amount is realized through the cooperative cooperation of the three mechanisms, the measurement error is effectively reduced, and the analysis of the two parameters of the tension and the stretching amount is favorable for objectively and accurately obtaining the tightness state of the packing belt.
Description
Technical Field
The invention relates to the technical field of packing belt measurement, and particularly provides a detection device for an external packing belt.
Background
To facilitate the transportation of the product, a packing box is configured by the requirement. Taking home appliances as an example, after the home appliances are stably placed in a packaging carton through a packaging lining such as foam, the packaging carton needs to be taped and packaged to ensure the integrity of products in the transportation process after leaving factories. At present, when a strapping machine is used for strapping a packaging carton, the tightness of the strapping machine is generally controlled by setting parameters of the strapping machine. However, the actual tightness value of the strapping band may deviate from the set parameters, and therefore, a tester may be required to detect the tightness of the strapping band. Because no professional method and special instrument are used for measurement, at present, the detection personnel generally adopt visual detection and other modes for measurement, for example, the detection personnel pull the packing belt to a limit position and then judge the tightness of the packing belt by vision and tension. Obviously, the judgment process of the detection method basically depends on individual subjective factors of detection personnel, so that the defect of large measurement error exists.
Accordingly, there is a need in the art for a new detection device for overwrap strapping bands that addresses the above-mentioned problems.
Disclosure of Invention
In order to solve the above problems in the prior art, namely the problem of large reading error in the conventional tightness detection method for the packing belt, the invention provides a detection device for the packing belt of the external package, which comprises a pressing mechanism and a stretching mechanism, wherein under the condition that the pressing mechanism presses the external package, the stretching mechanism can enable the packing belt to move relative to the external package in the direction away from the external package under the action of external force; wherein the detection device is further provided with a measuring mechanism capable of measuring the tensile length and the tensile force of the packing belt relative to the outer package through the movement.
In a preferred technical solution of the above detecting device, the stretching mechanism is movably disposed on the pressing mechanism, so that the measuring mechanism measures the stretching length and the tension of the packing strap relative to the outer package through the cooperation of the pressing mechanism and the stretching mechanism.
In a preferred technical solution of the above detecting device, the pressing mechanism includes a pressing shaft section, one end of the pressing shaft section near the outer package is provided with a pressing foot, and the stretching mechanism can move along an axial direction of the pressing shaft section under a condition that the pressing foot presses the outer package.
In the preferred technical scheme of the above detection device, the pressing shaft section is provided with length scales and tension scales, the measuring mechanism is fixed on the stretching mechanism, and the measuring mechanism comprises: the distance measuring structure comprises a first pointer arranged on the stretching mechanism, and the stretching length of the outer package is determined through the position of the first pointer on the length scale; and the force measuring structure is arranged on the stretching mechanism, a second pointer and a force measuring component arranged between the first pointer and the second pointer are arranged on the force measuring structure, and the pulling force of the stretching length of the outer package is determined according to the position of the second pointer on the pulling force scale.
In a preferred embodiment of the above detection device, the first pointer is closer to the outer package than the second pointer in an axial direction of the pressing shaft section.
In a preferred technical solution of the above detecting device, the measuring mechanism is slidably connected to the pressing shaft section.
In a preferred technical solution of the above detecting device, a locking mechanism is disposed between the measuring mechanism and the pressing shaft section, so as to limit the relative movement between the measuring mechanism and the pressing shaft section.
In a preferred embodiment of the above detecting device, the measuring mechanism includes a calibration member disposed on the stretching mechanism, and the calibration member is configured to calibrate initial positions of the first pointer and the second pointer with respect to a length scale and a tension scale on the pressing shaft section.
In a preferred technical solution of the above detection device, the measuring mechanism includes a distance measuring structure and a force measuring structure, both the distance measuring structure and the force measuring structure are fixedly connected to the stretching mechanism so as to move synchronously with the stretching mechanism, and the distance measuring structure and the force measuring structure can measure the stretching length and the pulling force of the strapping band relative to the outer package independently of the pressing mechanism.
In a preferred embodiment of the above detecting device, the pressing mechanism includes a pressing member disposed at an end of the pressing shaft section away from the presser foot; the pressing member presses the outer package by an external force with the presser foot pressed against the outer package; the stretching mechanism comprises a hanging hook capable of fixing the packing belt and a stretching handle used for holding, wherein the hanging hook is connected with the stretching handle so that the hanging hook can drive the packing belt to move towards the direction far away from the outer package when external force acts on the stretching handle.
The detection device for the packing belt of the outer package mainly comprises a pressing mechanism, a stretching mechanism and a measuring mechanism, wherein the pressing mechanism is adopted to press the outer package, so that the stretching amount measured each time has a uniform measuring standard, the stretching mechanism enables the packing belt to move relative to the outer package along the direction far away from the outer package, and the measuring mechanism is used for measuring the stretching length and the tension of the packing belt relative to the outer package. Compared with the traditional subjective detection mode, the method and the device have the advantages that the tightness of the packing belt is measured through the cooperative cooperation of the three mechanisms, specifically, the tension and the tension are obtained through the stretching mechanism and the measuring mechanism and analyzed, so that the tightness state of the packing belt is accurately obtained, the outer package is prevented from moving in the detection process through the pressing mechanism, and the operability of the detection operation is guaranteed.
In the preferred technical scheme of the invention, the pressing mechanism comprises a pressing shaft section, the stretching mechanism can move along the axial direction of the pressing shaft section, the measuring mechanism is fixed on the stretching mechanism, and the measurement of the stretching length and the tension is realized through the matching of a first pointer and a second pointer of the measuring mechanism with the length scale and the tension scale on the pressing shaft section. In this way, by skillfully associating the stretching mechanism, the measuring mechanism and the pressing mechanism with each other, the detection device is simple to operate, and can measure the stretching amount and the pulling force by only one hand of a single person without the operation of multiple persons. In addition, the detection device disclosed by the invention has the advantages of simple structure and ingenious design, and the detection device is convenient to build and free of fixed occupied area, so that the detection device not only can be suitable for different types of outer packages, but also has good adaptability to detection places where the outer packages are located.
Drawings
The detection device for an overwrap strapping band according to the present invention is described below with reference to the accompanying drawings. In the drawings:
fig. 1 is a schematic view of a detection device for an outer packing strapping band according to the present invention in use;
FIG. 2 is a schematic structural view of a detection device for an overwrap strapping band in accordance with the present invention;
fig. 3 is an enlarged schematic view of a portion a of fig. 2, in which the detection mechanism is shown.
List of reference numbers:
1. a pressing mechanism; 2. a stretching mechanism; 3. a measuring mechanism; 4. a locking mechanism; 5. a carton; 6. packing a belt; 11. compressing the shaft section; 12. a presser foot; 13. pushing and pressing the grip; 21. a hanging hook; 22. stretching the grip; 23. a first connecting rod; 31. a ranging structure; 32. a force measuring structure; 33. a calibration member; 111. length scales; 112. the tension is scaled; 311. a first pointer; 312. a first cyclic structure; 321. a second pointer; 322. a force measuring member; 323. a second ring structure.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. For example, although the present embodiment describes the measuring device of the invention as being used for detecting the tightness of a strapping band on a carton, it will be apparent that the measuring device may be used for detecting strapping bands on other types of outer packages, which may be adapted as required by the person skilled in the art to suit the particular application. For example, the measuring device can also be used for measuring the tightness of a packing belt on a plastic packing box.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Currently, in the product (e.g. electrical appliance) shipping stage, an outer package (e.g. carton) is usually used to package the product. Generally, an appliance is usually placed in a carton, a packing lining (such as foam) is placed between the appliance and the carton for shock absorption protection, and then the carton is subjected to banding packing by using a banding machine to complete the packing of the appliance.
After the packing is finished, the tightness of the packing belt needs to be measured and evaluated, and for this reason, the invention provides a detection device for the outer packing belt, which mainly comprises a pressing mechanism, a stretching mechanism and a measuring mechanism. In the measuring process, the pressing mechanism is used for pressing the carton surface so that the carton surface is attached to an electric appliance or a packaging lining in the carton, and therefore the stretching amount measured each time has a uniform reference surface. The stretching mechanism pulls the packing belt under the action of external force so that the packing belt moves relative to the carton in the direction far away from the carton. The detection mechanism detects the stretching length and the tension of the packing belt relative to the carton through the movement. It can be understood that, on the basis of ensuring that the measuring mechanism, the stretching mechanism and the pressing mechanism can complete respective functions, the three mechanisms can be structurally represented by three independent mechanisms or can be partially related. As a possible embodiment, the pressing mechanism, the stretching mechanism and the measuring mechanism are independent of one another. When the device is used for measuring, the pressing mechanism is adopted to press the carton box to the laminating machine, and then the stretching mechanism is used for pulling up the packing belt and simultaneously the measuring mechanism is used for measuring the stretching amount and the tension in real time.
There are many ways to determine the tightness based on the amount of stretch and the amount of tension, such as in one possible embodiment, reading the tension value when the strapping band is to be pulled to a set amount of stretch. And then, judging the tightness of the packing belt according to a comparison result of the tension value and a tension standard interval corresponding to the set tension, wherein the tension standard interval can be preset according to a large amount of early experimental data and represents the range of the tension value corresponding to the set tension on the premise of standard tightness. Of course, the tension value may be set, and then the tension amount under the set tension value is read, and the tightness of the strapping band is determined according to the comparison result between the tension amount and the tension amount standard interval, where the tension amount standard interval may be preset according to a large amount of early experimental data, which represents the range of the tension amount corresponding to the set tension value on the premise of the standard tightness. As an example, a set tension value is 30N, and a standard range of the amount of tension corresponding to the set tension value is 0-20mm. During measurement, the packing belt is pulled up by 30N force, then the value of the tensile quantity at the moment is read to be 15mm, and the tightness of the packing belt at the moment can be judged to reach the standard because the 15mm falls into the range of 0-20mm.
As can be seen from the above description, the detection device of the present invention makes the stretching amount measured each time have a uniform measurement reference through the arrangement of the pressing mechanism, so as to avoid the measurement error of the stretching amount caused by the uneven surface of the carton or the deformation of the carton. The stretching mechanism is arranged to enable the strap to move relative to the carton. In the matching process of the pressing and pulling of the pressing mechanism and the pulling mechanism, the measuring mechanism realizes the measurement of the tension and the pulling amount of the packing belt. Compared with the existing subjective detection mode, the detection device can realize the accurate measurement of two parameters of the tension and the stretching amount, thereby effectively reducing the measurement error. In addition, the analysis of the two parameters of the tension and the stretching amount is beneficial to objectively and accurately judging the tightness state of the packing belt.
Referring to fig. 1, fig. 1 is a schematic view of a use state of a detection device for an overwrap packing tape according to the present invention. As shown in fig. 1, the detecting device includes a pressing mechanism 1, a stretching mechanism 2 and a measuring mechanism 3, wherein the stretching mechanism 2 is movably disposed on the pressing mechanism 1 so that the pressing mechanism 1 presses the carton 5 while the stretching mechanism 2 can pull the packing belt 6 to move in a direction away from the carton 5. The measuring means 3 then obtains the tensile length and the amount of tension of the strapping band 6 relative to the carton 5 by measuring. Through the arrangement, a user can press the carton and pull the packing belt by one hand.
With continuing reference to fig. 1 and 2, fig. 2 is a schematic structural view of a detection device for an overwrap strapping band according to the present invention. As shown in fig. 1 and 2 and according to the orientation of fig. 2, the pressing mechanism 1 includes a pressing shaft section 11, a bottom end of the pressing shaft section 11 is provided with a pressing foot 12 for pressing the paper box 5, and the pressing foot 12 is perpendicular to the pressing shaft section 11. The pressing shaft 11 has a pressing handle 13 at its top end, and the pressing handle 13 presses the paper box 5 by an external force when the pressing foot 12 presses against the paper box 5. It will be appreciated that when the presser foot 12 is provided, the area of the presser foot 12 needs to be large enough to ensure that the presser foot 12 can support the detection device for stability during measurement.
The stretching mechanism 2 comprises a hanging hook 21 and a stretching handle 22, wherein the hanging hook 21 can fix the packing belt 6, and the hanging hook 21 can drive the packing belt 6 to move when external force acts on the stretching handle 22. While the pressing foot 12 presses the carton 5, the stretching mechanism 2 can move along the axial direction of the pressing shaft section 11, and the stretching amount of the packing belt 6 obtained by the measuring mechanism 3 at this time is the vertical distance of the packing belt 6 relative to the surface of the carton 5.
Referring to fig. 3, fig. 3 is an enlarged schematic view of a portion a of fig. 2, in which a detection mechanism is shown. As shown in fig. 3, the measuring mechanism 3 is fixed to the stretching mechanism 2, and the measuring mechanism 3 includes a distance measuring structure 31 and a force measuring structure 32, wherein the distance measuring structure 31 includes a first pointer 311 disposed on the stretching mechanism 2. The force measuring structure 32 comprises a second pointer 321 arranged at the stretching mechanism 2 and a force measuring member 322 located between the first pointer 311 and the second pointer 321, wherein the force measuring member 322 has an elastic amount so as to facilitate measurement of the tensile force, for example, the force measuring member 322 may be a spring. The pressing shaft section 11 is provided with a length scale 111 corresponding to the first pointer 311 and a tension scale 112 corresponding to the second pointer 321. During the measurement, while the tensioning mechanism 2 pulls the strapping band 6 along the axial direction of the pressing shaft segment 11 to move, the measuring mechanism 3 fixed on the tensioning mechanism 2 also moves along the axial direction of the pressing shaft segment 11 along with the tensioning mechanism 2, wherein the movement range of the first pointer 311 in the distance measuring structure 31 is within the scale range of the length scale 111, and the movement range of the second pointer 321 of the force measuring structure 32 is within the scale range of the tension scale 112. During reading, the distance measuring structure 31 determines the tensile length of the strapping band 6 by the position of the first pointer 311 on the length scale 111, and the force measuring structure 32 determines the tension of the strapping band 6 by the position of the second pointer 321 on the tension scale 112. Preferably, the first pointer 311 is closer to the carton 5 than the second pointer 321 along the axial direction of the pressing shaft section 11, and correspondingly, the position of the length scale 111 is closer to the carton 5 than the position of the tension scale 112 along the axial direction of the pressing shaft section 11, that is, the length scale 111 is located at the position of the pressing shaft section 11 close to the presser foot 12, and the tension scale 112 is located at the position of the pressing shaft section 11 far from the presser foot 12.
Preferably, the measuring mechanism is slidably connected to the pressing shaft section, so that the stretching mechanism 2 and the pressing shaft section 11 are slidably connected to each other to allow the stretching mechanism 2 and the measuring mechanism 3 to move along the axial direction of the pressing shaft section 11 under the external force acting on the stretching mechanism 2 without directly connecting the stretching mechanism 2 to the pressing shaft section 11. As a possible embodiment, the pressing shaft section 11 is provided with a slide rail (not shown in the figures) along its axial direction, on which the first pointer 311 and the second pointer 321 of the measuring mechanism 3 are slidably arranged. Under the action of external force, the stretching mechanism 2 moves and simultaneously drives the first pointer 311 and the second pointer 321 to move along the length scales and the tension scales on the pressing shaft section 11, so that the measurement of the stretching amount and the stretching force is realized.
It will be understood by those skilled in the art that the sliding connection manner of the measuring mechanism 3 and the pressing shaft segment 11 is not limited to the above-mentioned one, and as shown in fig. 3, in another possible embodiment, the distance measuring structure 31 and the force measuring structure 32 are respectively provided with a first annular structure 312 and a second annular structure 323 at the portions close to the pressing shaft segment 11, and the pressing shaft segment 11 is sequentially arranged through the first annular structure 312 and the second annular structure 323 so that the measuring mechanism 3 can move along the axial direction of the pressing shaft segment 11. The connection mode of the measuring mechanism 3 and the pressing mechanism 1 can be flexibly set by a person skilled in the art according to actual conditions, as long as the sliding connection between the two can be realized. Furthermore, the above example is realized by the sliding connection of the measuring mechanism 3 and the pressing shaft segment 11, so that the stretching mechanism 2 and the measuring mechanism 3 can move relative to the pressing shaft segment 11. Of course, it is also possible to arrange the stretching means 2 in a sliding connection to the pressing shaft section 11 so that the stretching means 2 and the measuring means 3 can move axially relative to the pressing shaft section 11.
With continued reference to fig. 3, preferably, a locking mechanism 4 may be provided between the measuring mechanism 3 and the pressing shaft segment 11, the locking mechanism 4 serving to limit the relative movement between the measuring mechanism 3 and the pressing shaft segment 11. As a specific example, the locking mechanism 4 shown in fig. 3 is a locking screw disposed on the first pointer 311 and the second pointer 321, and the current size can be locked by tightening the locking screw, and the measuring device can be taken off for reading. The current size is locked through the setting of locking mechanism so that the reading is positioned, thereby avoiding the pointer to move due to shaking during reading and causing measurement error.
Preferably, the measuring mechanism 3 comprises a calibration member 33 arranged on the stretching mechanism 2, the calibration member 33 being used for calibrating the initial position of the measuring mechanism 3 with respect to the length scale 111 and the tension scale 112. As a specific example, as shown in fig. 2, the stretching mechanism 2 includes a first connecting rod 23, one end of the first connecting rod 23 is connected to a first pointer 311, the other end of the first connecting rod 23 is connected to the hanging hook 21 through a calibration nut, an internal thread having a certain length is provided inside the calibration nut, an external thread matching the internal thread is provided at the other end of the first connecting rod 23, the length of the first connecting rod 23 can be changed by screwing the first connecting rod 23 into and out of the calibration nut, and thus the initial positions of the first pointer 311 and the second pointer 321 with respect to the length scale 111 and the tension scale 112 can be adjusted. It can be seen that the initial positions of the first pointer 311 and the second pointer 321 relative to the length scale 111 and the tension scale 112 on the pressing shaft segment 11 are calibrated by the arrangement of the calibration member 33, so that the accuracy of the detection device is ensured, and the measurement error caused by instrument error is avoided.
Those skilled in the art will appreciate that the above-described preferred embodiments can be combined in any suitable manner to suit a particular application and to meet various requirements of use.
The measuring mechanism 3 of the above example is used to implement the measuring function by cooperating with the length scale 111 and the tension scale 112 on the pressing shaft segment 11, and it can be understood by those skilled in the art that the measuring mechanism 3 can also implement its measuring function independently of the pressing mechanism 1, for example, in a possible embodiment, the measuring mechanism includes a distance measuring structure and a force measuring structure, the distance measuring structure and the force measuring structure are fixed to the stretching mechanism so that the distance measuring structure and the force measuring structure can move synchronously with the stretching mechanism, and the distance measuring structure and the force measuring structure can measure the stretching length and the tension of the packing belt relative to the carton independently of the pressing mechanism. As a specific example, the distance measuring structure is a distance measuring sensor fixed on the stretching mechanism, the force measuring structure is an electronic tension meter arranged on the stretching mechanism, the distance measuring sensor can synchronously measure the distance from the packing belt to the carton while the stretching mechanism pulls the packing belt to move, and the electronic tension machine can measure the tension of the packing belt, so as to obtain the stretching amount and the tension value of the packing belt.
In summary, the detection device provided by the invention realizes accurate measurement of two parameters of the tension and the stretching amount through the cooperative cooperation of the pressing mechanism, the stretching mechanism and the measuring mechanism, and accurately judges the tightness state of the packing belt according to the analysis of the two parameters of the tension and the stretching amount. In a preferred embodiment, the pressing mechanism, the stretching mechanism and the measuring mechanism are structurally related to each other on the basis of ensuring that the respective functions are realized, for example, the first pointer and the second pointer of the measuring mechanism are matched with the length scale and the tension scale of the pressing shaft section to realize the measurement of the tension and the stretching amount, so that the measurement of the stretching amount and the tension can be realized by only one hand of a single person, and the measurement accuracy and the measurement efficiency are improved.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (4)
1. A detection device for a packing belt of an external package is characterized by comprising a pressing mechanism and a stretching mechanism, wherein under the condition that the pressing mechanism presses the external package, the stretching mechanism can enable the packing belt to move relative to the external package in a direction far away from the external package under the action of external force;
wherein the detection device is also provided with a measuring mechanism which can measure the stretching length and the pulling force of the packing belt relative to the outer package through the movement;
the stretching mechanism is movably arranged on the pressing mechanism, so that the measuring mechanism is used for measuring the stretching length and the pulling force of the packing belt relative to the outer package through the matching of the pressing mechanism and the stretching mechanism;
the pressing mechanism comprises a pressing shaft section, a pressing foot is arranged at one end, close to the outer package, of the pressing shaft section, and the stretching mechanism can move along the axial direction of the pressing shaft section under the condition that the pressing foot presses the outer package;
compress tightly and be provided with length scale and pulling force scale on the shaft part, measuring mechanism is fixed in stretching mechanism, measuring mechanism includes:
the distance measuring structure comprises a first pointer arranged on the stretching mechanism, and the stretching length of the outer package is determined according to the position of the first pointer on the length scale; and
the force measuring structure is arranged on the stretching mechanism, a second pointer and a force measuring component arranged between the first pointer and the second pointer are arranged on the force measuring structure, the tension of the stretching length of the outer package is determined according to the position of the second pointer on the tension scale, and the force measuring component is a spring;
the first pointer is closer to the outer package than the second pointer along the axial direction of the pressing shaft section;
the measuring mechanism is connected with the pressing shaft section in a sliding manner;
the distance measuring structure with the dynamometry structure is being close to compress tightly the part of shaft part and is being provided with first cyclic structure and second cyclic structure respectively, compress tightly the shaft part run through in proper order set up in first cyclic structure with second cyclic structure so that measuring mechanism can along compress tightly the axial motion of shaft part.
2. The sensing device of claim 1, wherein a locking mechanism is disposed between the measuring mechanism and the clamping shaft segment to limit relative movement between the measuring mechanism and the clamping shaft segment.
3. The sensing device of claim 1, wherein the measuring mechanism includes a calibration member disposed on the stretching mechanism for calibrating an initial position of the first and second pointers relative to the length scale and the tension scale on the pinched shaft segment.
4. The detecting device according to any one of claims 1 to 3, wherein the pressing mechanism includes a pressing member provided at an end of the pressing shaft section remote from the presser foot; the pressing member presses the outer package by an external force with the presser foot pressed against the outer package;
the stretching mechanism comprises a hanging hook capable of fixing the packing belt and a stretching handle for holding, and the hanging hook is connected with the stretching handle so that the hanging hook can drive the packing belt to move towards the direction far away from the outer package when external force acts on the stretching handle.
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| CN1511761A (en) * | 2002-12-27 | 2004-07-14 | 威宇科技测试封装（上海）有限公司 | Tightness measuring method and its device for packing belt baling press |
| CN201266125Y (en) * | 2008-08-07 | 2009-07-01 | 常州市明及电气技术开发有限公司 | Spring tension detecting instrument |
| CN205562085U (en) * | 2016-04-14 | 2016-09-07 | 张春阳 | Student uses spring dynamometer |
| CN206114499U (en) * | 2016-09-08 | 2017-04-19 | 海宁正泰新能源科技有限公司 | Verifying attachment of packing effect in packing area |
| CN206331690U (en) * | 2016-12-06 | 2017-07-14 | 郑州科技学院 | A kind of Physical Experiment dynamometer |
| CN207163606U (en) * | 2017-07-03 | 2018-03-30 | 信阳师范学院 | A kind of Physical Experiment weight beam |
| CN107195233B (en) * | 2017-07-27 | 2022-10-11 | 衡阳师范学院 | Archimedes' law rapid demonstration instrument |
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