JP6685147B2 - measuring device - Google Patents

Description

  The present invention has openings formed on the left and right sides of a corrugated cardboard blank sheet formed into a tubular shape, respectively, by a flap portion in which at least one outer flap and at least one inner flap of the corrugated cardboard blank sheet are adhered to each other. The present invention relates to a measuring device which is used for a closed packaging box and measures the adhesive strength at the flap portion.

  BACKGROUND ART Conventionally, hexahedral packaging boxes have been used to package beverage cans such as canned beer. Generally, a packaging box is formed by forming a corrugated cardboard blank sheet into a tubular shape as shown in the figure, and further adhering the outer flap and the inner flap of the corrugated cardboard blank sheet to each other so as to close the openings formed on the left and right sides thereof. It is formed by Usually, the outer flap and the inner flap are bonded by a hot melt adhesive, but it is important to keep this bonding strength within a predetermined range in the packaging box. If the adhesive strength is too weak, the adhesion between the flaps will be peeled off unnecessarily during the transportation process and the like, which is a problem in storage.On the other hand, if the adhesive strength is too strong, it will impose a heavy burden when trying to remove the beverage can. . Therefore, it is necessary to control the adhesive strength between the flaps in manufacturing the packaging box.

  To control the adhesive strength between the flaps, at the time of manufacturing the packaging box, the measurement target is selected at random from the manufactured packaging box, and the adhesive strength can be adjusted from the measured adhesive strength. Has been. Then, for measuring the adhesive strength, a load measuring device connected to a hook is used, and when the hook of the load measuring device is hooked on the outer flap, the load measuring device is pulled and the outer flap is peeled off. The load is taken as its adhesive strength.

  However, if this measurement is performed manually, the load measuring device cannot be pulled under completely the same conditions, and the results tend to vary. Therefore, in Japanese Patent Application Laid-Open No. 2006-337101 (Patent Document 1) and Japanese Patent Application Laid-Open No. 2013-83595 (Patent Document 2), an adhesive strength between the flaps is obtained by pulling a load measuring device connected to the flaps by a moving mechanism. An apparatus for measuring is disclosed. According to these, the adhesive strength can be accurately measured by using mechanical means instead of human power.

JP, 2006-337101, A JP, 2013-83595, A

  In the packaging box formed as described above, the surfaces to which the flaps are adhered are formed on the left and right sides. Therefore, the adhesive strength must be measured on both sides. In the above-mentioned conventional measuring device, the adhesive strength can be measured only from one side, and when trying to measure the adhesive strength on both sides, it is necessary to change the direction of the packaging box.

  Therefore, a measuring device that can efficiently measure the adhesive strength is desired.

The measuring device according to the present invention,
A packaging box in which openings formed on the left and right sides of a corrugated cardboard blank sheet formed into a tubular shape are respectively closed by flap portions obtained by adhering at least one outer flap and at least one inner flap of the corrugated cardboard blank sheet to each other. Used for, a measuring device for measuring the adhesive strength in the flap portion,
A holding unit that holds the packaging box in a stationary state ,
A pair of hooks hooked on each outer flap,
A pair of load measuring devices for tension force measurement, which are provided at positions facing each flap part in a state where the packaging box is held by the holding part, and are respectively connected to the hook parts,
And a pair of moving mechanisms for moving each load measuring device in a direction of retracting from the facing flap portion.

  According to this structure, the flap portions formed on the left and right sides of the packaging box can be measured by the pair of hook portions, the load measuring device, and the moving mechanism. As a result, it is possible to save the trouble of changing the direction of the packaging box in the measurement of the adhesive strength, and to efficiently measure the adhesive strength.

  As one aspect, a second hook portion hooked to an adhesive portion when the corrugated cardboard blank sheet is formed into a tubular shape, and provided to face the adhesive portion of the packaging box held by the holding portion, It is preferable to include a second load measuring device connected to the second hook portion, and a second moving mechanism that moves the second load measuring device in a direction in which the adhesive portion separates.

  When the corrugated cardboard blank sheet is formed into a tubular shape, the packaging box formed as described above adheres the end portions to each other, for example, by adhering the flap provided at one end and the other end. There is a need. The adhesive strength of that portion has the same problem as that of the flap portion, and it is desirable to measure the adhesive strength of this adhesive portion. Then, according to this configuration, the adhesive strength of the adhesive portion can be measured by the second hook portion, the second load measuring device, and the second moving mechanism. Furthermore, the measurement can be performed without changing the position of the packaging box from the position where the adhesive strength of the flap portion is measured.

  As one aspect, it is preferable to include a control unit that adjusts the positions of the pair of load measuring devices according to the size of the packaging box.

  With this configuration, it is possible to accommodate packaging boxes of various sizes.

Top view of corrugated blank sheet Explanatory perspective view of packaging box Top view of measuring device Front view of partial section of measuring device Explanatory drawing showing the operation of the flap strength measuring unit Partial cross-sectional side view of measuring device Explanatory diagram showing the operation of the adhesive strength measuring unit

  An embodiment of a measuring device according to the present invention will be described with reference to the drawings. The measuring device 20 according to the present embodiment has openings formed on both left and right sides of a corrugated cardboard blank sheet 1 formed into a tubular shape, with at least one outer flap 7 and at least one inner flap 8 of the corrugated cardboard blank sheet 1. Is a measuring device 20 for measuring the adhesive strength of the flaps 9 used for the packaging boxes 10 each closed by the flaps 9 adhered to each other. The measuring device 20 includes a holder 22 for holding the packaging box 10, a pair of hooks 25, 25 hooked on the outer flaps, and flaps 9, 9 holding the packaging box 10 by the holder 22. A pair of load measuring devices 26, 26 provided at opposite positions and connected to the hook parts 25, 25, respectively, and each load measuring device 26, 26 is moved in a direction to retract from the facing flap parts 9, 9. And a pair of moving mechanisms 27, 27. Thereby, the adhesive strength can be measured efficiently. Hereinafter, the measuring device 20 according to the present embodiment will be described in detail.

  First, the packaging box 10 targeted by the measuring device 20 according to the present embodiment will be described. The packaging box 10 is used for packaging beverage cans such as canned beer, and is formed, for example, by assembling a corrugated cardboard blank sheet 1 as shown in FIG. When assembled as a packaging box 10, the corrugated cardboard blank sheet 1 is, in order from the bottom in FIG. 1, a top surface portion 2 serving as a top surface, a first side surface portion 3 serving as a side surface, a bottom surface portion 4 serving as a bottom surface, and a first side surface. A second side surface portion 5 is provided as a side surface opposite to the portion 3. Further, the second side surface portion 5 is provided with a connecting flap 6 which is connected to the top surface portion 2 when assembled in the packaging box 10. In addition, the top face 2 and the bottom face 4 are provided with outer flaps 7 on both sides thereof which are arranged outside the packaging box 10 at the time of assembling into the packaging box 10, and the first and second side face portions 3 and 5 are provided. Are provided with inner flaps 8 on both sides thereof, which are arranged inside the packaging box 10 when assembled into the packaging box 10.

  Explaining the procedure for assembling the packaging box 10, first, a beverage can for packaging is arranged at a predetermined position on the bottom surface portion 3 of the corrugated cardboard blank sheet 1, and in that state, the first and second side surface portions 3 and 5 are raised. Further, the top surface portion 2 is bent from the first side surface portion 3 to a position facing the bottom surface portion 4, and the connecting flap 6 is adhered to an end side of the top surface portion 2 (this is referred to as an adhesive portion G). Further, the outer flap 7 and the inner flap 8 of the corrugated cardboard blank sheet are adhered to each other to close the openings formed on the left and right sides of the corrugated cardboard blank sheet 1 formed into a tubular shape, respectively. More specifically, the inner flaps 8 are folded, then the outer flaps 7 are overlapped and folded thereon, and the front surface of the inner flaps 6 and the back surface of the outer flaps 7 are bonded with a hot melt adhesive (formed in this way). A portion including the outer flap 7 and the inner flap 8 is referred to as a flap portion 9). As a result, the packaging box 10 as shown in FIG. 2 is completed.

  In the packaging box 10 thus formed, the adhesive strength of the flap portion 9 (the adhesive strength between the outer flap 7 and the inner flap 8) becomes a problem. If it is too weak, it may peel off during transportation, and if it is too strong, it becomes difficult to open it. Therefore, it is necessary to inspect whether the product is manufactured with an appropriate adhesive strength and to adjust the adhesive strength at any time according to the measured value. Therefore, the manufactured packaging box 10 is used as a sample for the packaging box 10 used for measurement. It is necessary to extract and measure at any time. The measuring device 20 according to the present embodiment can be suitably used for measuring the adhesive strength.

  As shown in FIG. 3, the measuring device 20 according to the present embodiment includes a placing portion 21 on which the packaging box 10 is placed, a pair of holding portions 22 for holding the packaging box 10 placed on the placing portion 21, 22 and a pair of flap part strength measuring parts 23, 23 for measuring the adhesive strength of the flap parts 9, 9 of the packaging box 10 held by the holding parts 22, 22 and provided above one holding part 22. The adhesive strength measuring unit 24 is provided.

  The mounting portion 21 has a mounting surface portion 21a formed on a flat plate, and the packaging box 10 is placed thereon. Although illustration is omitted, the mounting surface portion 21a of the packaging box 10 is provided with a non-slip member, and even if the packaging box 10 is pulled by the flap portion strength measuring unit 23, the packaging box 10 is not covered by the flap portion strength measuring unit 23 side. It is difficult to move to. Further, as shown in FIG. 4, a handle portion 21b capable of moving up and down the mounting surface portion 21a by its operation is provided.

  In the present embodiment, the bottom surface portion 4 of the packaging box 10 faces the mounting surface portion 21a, the first and second side surface portions 3 and 5 of the packaging box 10 face the holding portion 22, and the flap of the packaging box 10 faces. The packaging box 10 is placed on the placement surface 21a with the parts 9 and 9 facing the flap strength measuring part 23 and the adhesive portion G of the packaging box 10 facing the adhesive strength measuring part 24. Therefore, hereinafter, a direction orthogonal to the top surface portion 2 and the bottom surface portion 4 when the packaging box 10 is placed on the mounting surface portion 21a in the above state is referred to as a height direction H, and the first and second side surface portions 3, The direction orthogonal to 5 will be referred to as the width direction W, and the direction orthogonal to the flap portions 9 and 9 will be referred to as the longitudinal direction L.

  The holding portions 22 are each movable in the width direction W, and when the packaging box 10 is placed on the placing portion 21, the interval thereof is widened, and after the packaging box 10 is placed, the interval is narrowed. The holding box 22 holds the packaging box 10 from both sides by the contact portions 22a. Thereby, the packaging box 10 can be held. Further, the holding portion 22 includes a stopper member 22b and a plate member 22c, and the movable range of the contact portion 22a is limited by the stopper member 22b hitting the plate member 22c. The position at which the contact portion 22a is positioned by the stop member 22b and the plate member 22c may be adjusted to the length in the width direction W of the packaging box 10 applied to the measuring device 20. In addition, a stopper 22d for positioning the contact portion 22a is provided, and the contact portion 22a can be positioned at an arbitrary position by screwing the stopper 22d. In order that the packaging box 10 can be arranged in the center of the mounting portion 21 even if the packaging box 10 is changed in size, the holding portion 22 is provided with scales (not shown) adapted to the packaging boxes 10 of a plurality of sizes. The contact portion 22a can be positioned at a desired position by operating the stopper 22d with the plate member 22c aligned with the scale, for example. Further, similar to the mounting surface portion 21a, a non-slip member is also provided on the contact portion 22a, so that even if the packaging box 10 is pulled by the flap portion strength measurement unit 23, the packaging box 10 will be attached to the flap portion strength measurement unit 23 side. It is difficult to move to.

  The flap section strength measuring section 23 includes a hook section 25 hooked on the outer flap 7 of the opposing flap section 9, a load measuring instrument 26 connected to the hook section 25, and a moving mechanism 27 connected to the load measuring instrument 26. And The hook portion 25 is bifurcated and each has an L-shaped tip, and the tip is inserted into the gap 9a between the outer flaps 7 of the flap portion 9 and hooked on either the upper or lower outer flap 7. The load measuring unit 26 is provided at a position facing the flap unit 9 in a state where the holding unit 22 holds the packaging box 10. The load measuring device 26 has a measuring shaft 26a at its tip and can measure the tensile force applied to the measuring shaft 26a. The hook portion 25 is connected to the measuring shaft 26a, and thus the adhesive strength of the outer flap 7 can be measured via the hook portion 25. The moving mechanism 27 also includes a slide member 27a connected to the load measuring unit 26, and a drive unit 27b that is connected to a power source (not shown) and moves the slide member 27a along the longitudinal direction L. By moving the slide member 27a by the driving unit 27b, the load measuring unit 26 can be moved along the longitudinal direction L. When measuring the adhesive strength of the flap unit 9, the load measuring unit 26 is moved to the opposite flap unit. Move in the direction of withdrawing from 9.

  Similarly to the flap portion strength measuring unit 23, the adhesive portion strength measuring unit 24 also has a hook portion 28 (corresponding to a second hook portion) hooked on the adhesive portion G and a load measuring device 29 (first hook) connected to the hook portion 28. Two load measuring devices) and a moving mechanism 30 (corresponding to a second moving mechanism) connected to the load measuring device 29. Similarly, the hook portion 28 is bifurcated and each tip is L-shaped, and the tip is inserted into the gap of the adhesive portion G and hooked on the adhesive portion G. The load measuring device 29 is provided at a position facing the bonding portion G of the packaging box 10 held by the holding portion 22. The load measuring unit 29 also has a measuring shaft 29a at its tip and can measure the tensile force applied to this measuring shaft 29a. Then, the hook portion 28 is connected to the measuring shaft 29 a, whereby the adhesive strength of the adhesive portion G can be measured via the hook portion 28. The moving mechanism 27 also includes a slide member 30a connected to the load measuring unit 29, and a driving unit 30b that is connected to a power source (not shown) and moves the slide member 30a along the height direction H. By moving the slide member 30a by the drive unit 30b, the load measuring unit 29 can be moved along the height direction H. When measuring the adhesive strength of the adhesive portion G, the load measuring device 29 is moved to the adhesive portion G. Move in the direction of peeling.

  Although not shown, the measuring device 20 includes a control unit that controls the flap strength measuring unit 23 and the adhesive strength measuring unit 24. The control section causes the flap section strength measuring section 23 and the adhesive section strength measuring section 24 to perform basic operations, and the positions of the load measuring devices 26, 26, 29 can be adjusted according to the size of the packaging box 10. (See below for details).

  Next, the measurement of the adhesive strength by the measuring device 20 will be described. First, the packaging box 10 to be measured is placed on the placing section 21 of the measuring device 20, and then the holding section 22 holds the packaging box 10. Then, in order to measure the adhesive strength of the flap portions 9, 9, hook portions 25, 25 are hooked on either the upper or lower sides of the outer flaps 7, 7 of the flap portions 9, 9, respectively. After that, for example, an operation button (not shown) is pressed to give a command to the control unit, and as shown in FIG. 6, the moving mechanism 27 operates until the outer flaps 7, 7 hooked with the hooks 25, 25 come off. The load measuring devices 26, 26 are moved in a direction of retreating from the flap portions 9 facing each other. Then, the value measured by the load measuring devices 26, 26 after the peeling is taken as the adhesive strength in each flap part 9, 9. Then, the hook portions 25 and 25 are hooked on the upper and lower sides of the outer flaps 7 and 7 of both flap portions 9 and 9, respectively, and the same operation is performed. Further, in order to measure the adhesive strength of the adhesive portion G, the hook portion 28 is hooked on the adhesive portion G. Then, for example, by pressing an operation button (not shown) to give a command to the control unit, and as shown in FIG. And the value measured by the load measuring device 29 after peeling is taken as the adhesive strength in the adhesive portion G. In addition, the measurement of the adhesive strength of each of the flap portions 9 and 9 may be performed simultaneously on both the flaps 9 and 9 or separately. Further, the measurement of the adhesive strength of each flap portion 9, 9 and the measurement of the adhesive strength of the adhesive portion G may be performed simultaneously or separately.

  As described above, in the measuring device 20 according to the present embodiment, the adhesive strength of the flap portions 9 and 9 and the adhesive strength of the adhesive portion G are measured without changing the direction of the packaging box 10 in the middle. The adhesive strength of each part can be measured efficiently.

  Further, the measuring device 20 according to the present embodiment can be applied to various packaging boxes 10. Even if the size of the packaging box 10 changes, as described above, the mounting portion 21 is provided with the handle portion 21b capable of moving up and down the mounting surface portion 21a, and the load measuring device 29 is also moved by the moving mechanism 30. Since it is movable in the height direction H, the height difference of the packaging box 10 can be dealt with by adjusting the position in the height direction H. Further, since each of the holding portions 22 is movable in the width direction W, by adjusting the position in the width direction W, it is possible to cope with the difference in width of the packaging box 10. Since the load measuring device 26 can be moved in the longitudinal direction L by the moving mechanism 27, by adjusting the longitudinal direction L, it is possible to cope with the difference in the length of the packaging box 10.

  With respect to the load measuring devices 26, 26, 29, by inputting information of the packaging box 10 (for example, dimensions and management number of the packaging box 10) to a control unit (not shown), the load measuring instruments 26, 26, 29 are automatically moved to the corresponding positions. It is like this. It should be noted that the other mounting unit 21 and the holding unit 22 may also be configured to automatically move according to a command from the control unit.

[Other Embodiments]
Lastly, other embodiments of the measuring apparatus according to the present invention will be described. Note that the configurations disclosed in the following respective embodiments can be applied in combination with the configurations disclosed in other embodiments as long as no contradiction occurs.

(1) In the above-described embodiment, the moving mechanism 27, 30 is described as an example in which the moving mechanism is connected to the power source and driven. However, the embodiment of the present invention is not limited to this. The moving mechanisms 27 and 30 may be driven by human power.

(2) In the above embodiment, the hook portions 25 and 28 are bifurcated and the respective tips are formed in an L-shape. However, the embodiment of the present invention is not limited to this. The shape of the hook portions 25 and 28 is not particularly limited, and the hook portion may not be divided into two, and may be three or more.

(3) Regarding other configurations, it should be understood that the embodiments disclosed in the present specification are exemplifications in all respects, and the scope of the present invention is not limited thereby. Those skilled in the art can easily understand that appropriate modifications can be made without departing from the spirit of the present invention. Therefore, other embodiments modified without departing from the spirit of the present invention are naturally included in the scope of the present invention.

  INDUSTRIAL APPLICATION This invention can be utilized for the measurement of the adhesive strength of the packaging box which accommodates a beverage can etc., for example.

1 Corrugated Cardboard Blank Sheet 7 Outer Flap 8 Inner Flap 9 Flap Part 10 Packaging Box 20 Measuring Device 22 Holding Part 25 Hook Part 26 Load Measuring Device 27 Moving Mechanism 28 Hook Part (Second Hook Part)
29 Load measuring device (second load measuring device)
30 moving mechanism (second moving mechanism)

Claims (3)

A packaging box in which openings formed on the left and right sides of a corrugated cardboard blank sheet formed into a tubular shape are respectively closed by flap portions obtained by adhering at least one outer flap and at least one inner flap of the corrugated cardboard blank sheet to each other. Used for, a measuring device for measuring the adhesive strength in the flap portion,
A holding unit that holds the packaging box in a stationary state ,
A pair of hooks hooked on each outer flap,
A pair of load measuring devices for tension force measurement, which are provided at positions facing each flap part in a state where the packaging box is held by the holding part, and are respectively connected to the hook parts,
A pair of moving mechanisms that move each load measuring device in a direction to retract from the facing flap portion. A second hook portion hooked to an adhesive portion when the corrugated cardboard blank sheet is formed into a tubular shape;
A second load measuring device which is provided at a position facing the adhesive part of the packaging box in a state of being held by the holding part and which is connected to the second hook part;
The 2nd moving mechanism which moves the 2nd load measuring device in the direction where the above-mentioned adhesion part peels, The measuring device according to claim 1.   The measuring device according to claim 1, further comprising a control unit that adjusts the positions of the pair of load measuring devices according to the size of the packaging box.

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