JP2017150994A - measuring device - Google Patents

Abstract

[Problem] To efficiently measure adhesive strength. [Solution] A measuring device (20) connects openings formed on both left and right sides of a cylindrically shaped corrugated blank sheet by bonding at least one outer flap and at least one inner flap of the corrugated blank sheet to each other. The adhesive strength at the flap parts (9) used for the packaging box (10) each closed by the flap parts (9, 9) is measured. 22), a pair of hook parts (25, 25) to be hooked on each outer flap, and a pair of hook parts (25, 25) at positions opposite to each flap part (9, 9) with the packaging box (20) held by the holding part (22). A pair of load measuring devices (26, 26) are provided and connected to the hook portions (25, 25), respectively, and each load measuring device (26, 26) is retracted from the opposing flap portions (9, 9). A pair of moving mechanisms (27, 27) for moving in the respective directions. [Selection view] Fig. 3

Description

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

  Conventionally, hexahedral packaging boxes have been used for packaging beverage cans such as canned beer. Generally, a packaging box is formed by corrugating a cardboard blank sheet as shown in the figure, and then bonding the outer and inner flaps of the cardboard blank sheet to each other so as to close the openings formed on the left and right sides thereof. Is formed. Usually, the outer flap and the inner flap are bonded by a hot melt adhesive, but it is important to keep the bonding strength within a predetermined range in the packaging box. This is because if the adhesive strength is too weak, the adhesive between the flaps is unnecessarily peeled off during the transportation process, which is a problem in storage. On the other hand, if the adhesive strength is too strong, a large burden is applied when trying to take out the beverage can. . Therefore, in manufacturing a packaging box, it is necessary to manage the adhesive strength between flaps.

  In order to manage the adhesive strength between flaps, when manufacturing a packaging box, the measurement target is periodically selected randomly from the manufactured packaging box, and the adhesive strength can be adjusted from the measured adhesive strength. It has been. A load measuring instrument connected to the hook is used for measuring the adhesive strength. When the load measuring instrument is hooked on the outer flap, the load measuring instrument is pulled and the outer flap is peeled off. The load is the bond strength.

  However, if this measurement is performed manually, the load measuring instrument cannot be pulled under the same exact condition, and the results are likely to vary. Therefore, in JP 2006-337101 A (Patent Document 1) and JP 2013-83595 A (Patent Document 2), an adhesive strength between flaps is obtained by pulling a load measuring instrument 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

  The packaging box formed as described above has a surface in which flaps are bonded to the left and right sides. Therefore, the measurement of adhesive strength must be performed on both sides. And in the said conventional measuring apparatus, adhesive strength could be measured only from one side, and when it was going to measure the adhesive strength of both sides, the effort which had to change the direction of the packaging box had arisen.

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

The measuring apparatus according to the present invention is
Packaging boxes in which openings formed on both the left and right sides of a corrugated cardboard blank sheet formed into a cylindrical shape are respectively closed by a flap part in which at least one outer flap and at least one inner flap of the corrugated cardboard blank sheet are bonded to each other. A measuring device for measuring the adhesive strength in the flap part,
A holding unit for holding the packaging box;
A pair of hooks hooked to each outer flap;
A pair of load measuring devices provided at positions facing the respective flap portions in a state where the packaging box is held by the holding portion, and connected to the hook portions, respectively.
And a pair of moving mechanisms for moving each load measuring device in a direction of retracting from the opposing flap portion.

  According to this configuration, 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. Thereby, the effort which changes the direction of a packaging box in the measurement of adhesive strength can be saved, and adhesive strength can be measured efficiently.

  As one aspect, the second hook part hooked on the adhesive part when the cardboard blank sheet is formed into a cylindrical shape, and the adhesive part of the packaging box in a state of being held by the holding part are provided, It is preferable to include a second load measuring device connected to the second hook portion and a second moving mechanism for moving the second load measuring device in a direction in which the adhesive portion peels off.

  The packaging box formed as described above, when forming a cardboard blank sheet into a cylindrical shape, bonds the ends to each other, for example, by bonding a flap provided at one end and the other end. There is a need. And the adhesive strength of the part has the same problem as the above-mentioned flap part, and it is desirable to measure the adhesive strength of the adhesive part. And according to this structure, the adhesive strength of this adhesion part can be measured with the 2nd hook part, the 2nd load measuring instrument, and the 2nd moving mechanism. Further, the measurement can be performed without changing the position of the packaging box from the position at which the adhesive strength of the flap portion is measured.

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

  According to this structure, it can respond to the packaging box of various sizes.

Top view of cardboard blank sheet Description perspective view of packaging box Plan view of measuring device Partial sectional front view of the measuring device Explanatory diagram showing the operation of the flap strength measurement unit Partial sectional side view of measuring device Explanatory drawing which shows operation of adhesion part strength measurement part

  An embodiment of a measuring apparatus 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 the left and right sides of the corrugated cardboard blank sheet 1 formed into a cylindrical shape, with at least one outer flap 7 and at least one inner flap 8 of the corrugated cardboard blank sheet 1. It is the measuring apparatus 20 which measures the adhesive strength in the flap part 9 used for the packaging box 10 each closed by the flap part 9 which mutually adhere | attached. The measuring device 20 includes a holding portion 22 that holds the packaging box 10, a pair of hook portions 25 and 25 that are hooked on each outer flap, and each flap portion 9 and 9 that holds the packaging box 10 by the holding portion 22. A pair of load measuring devices 26, 26 provided at opposing positions and connected to the hook portions 25, 25, respectively, and the load measuring devices 26, 26 are moved in directions to retract from the opposing flap portions 9, 9. A pair of moving mechanisms 27 and 27 to be moved. Thereby, adhesive strength can be measured efficiently. Hereinafter, the measuring apparatus 20 according to the present embodiment will be described in detail.

  First, the packaging box 10 targeted by the measuring apparatus 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 the cardboard blank sheet 1 is assembled as a packaging box 10 in order from the bottom in FIG. 1, the top surface portion 2 as the top surface, the first side surface portion 3 as the side surface, the bottom surface portion 4 as the bottom surface, and the first side surface, respectively. 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 that is connected to the top surface portion 2 during assembly into the packaging box 10. In addition, the top surface portion 2 and the bottom surface portion 4 are provided with outer flaps 7 arranged on both sides of the packaging box 10 when assembled to the packaging box 10. Are provided on both sides thereof with inner flaps 8 arranged inside the packaging box 10 when assembled into the packaging box 10.

  The assembly procedure of the packaging box 10 will be described. First, a packaging beverage can is placed at a predetermined position on the bottom surface portion 3 of the cardboard blank sheet 1, and the first and second side surface portions 3 and 5 are raised in that state. 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 bonded to the end side of the top surface portion 2 (this is referred to as an adhesive portion G). Further, the openings formed on the left and right sides of the corrugated cardboard blank sheet 1 formed into a cylindrical shape are closed by bonding the outer flap 7 and the inner flap 8 of the corrugated cardboard blank sheet to each other. More specifically, the inner flap 8 is folded and then the outer flap 7 is overlaid and folded, and the front surface of the inner flap 6 and the back surface of the outer flap 7 are bonded by a hot melt adhesive (formed in this way). A portion composed of the outer flap 7 and the inner flap 8 is referred to as a flap portion 9). Thereby, 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 (adhesive strength between the outer flap 7 and the inner flap 8) becomes a problem. If it is too weak, it may be peeled off during conveyance, and if it is too strong, it will be difficult to open. Therefore, it is necessary to inspect whether it is manufactured with an appropriate adhesive strength, and to adjust the adhesive strength as needed according to the measured value. For that purpose, the packaging box 10 used for measurement is used as a sample from the manufactured packaging box 10. It is necessary to extract and measure from time to 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 measurement device 20 according to the present embodiment includes a placement unit 21 on which the packaging box 10 is placed, and a pair of holding units 22 that hold the packaging box 10 placed on the placement unit 21. 22, a pair of flap portion strength measuring units 23, 23 for measuring the adhesive strength at the flap portions 9, 9 of the packaging box 10 held by the holding portions 22, 22, and above one holding portion 22 A bonded portion strength measuring unit 24.

  The mounting part 21 has a mounting surface part 21a formed on a flat plate, on which the packaging box 10 is arranged. Although illustration is omitted, an anti-slip member is provided on the mounting surface portion 21 a of the packaging box 10, so that even if the packaging box 10 is pulled by the flap strength measuring unit 23, the packaging box 10 is on the side of the flap strength measuring unit 23. It is difficult to move to. Moreover, as shown in FIG. 4, the handle part 21b which can raise / lower the mounting surface part 21a by the operation is provided.

  In the present embodiment, the bottom surface portion 4 of the packaging box 10 faces the placement 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 The packaging box 10 is placed on the placement surface portion 21 a with the portions 9 and 9 facing the flap strength measuring portion 23 and the adhesive portion G of the packaging box 10 facing the adhesive strength measuring portion 24. For this reason, hereinafter, the direction perpendicular to the top surface portion 2 and the bottom surface portion 4 when the packaging box 10 is placed on the placement surface portion 21a in the above state is defined as the height direction H, and the first and second side surface portions 3, The direction orthogonal to 5 is defined as the width direction W, and the direction orthogonal to the flap portions 9 and 9 is defined as the longitudinal direction L.

  Each holding part 22 is movable in the width direction W. When the packaging box 10 is placed on the placing part 21, the interval is widened, and after the packaging box 10 is placed, the gap is narrowed. The packaging box 10 is sandwiched from both sides by the contact portion 22a of the holding portion 22. Thereby, the packaging box 10 can be held. The holding portion 22 includes a stop member 22b and a plate member 22c. When the plate member 22c hits the stop member 22b, the movable range of the contact portion 22a is limited. The position where the contact portion 22a is positioned by the stopper 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 any position by screwing operation of the stopper 22d. In order to be able to arrange the packaging box 10 in the center of the mounting portion 21 even if the size of the packaging box 10 changes, the holding portion 22 has a scale (not shown) that is adapted to the packaging boxes 10 of a plurality of sizes. For example, the contact portion 22a can be positioned at a desired position by operating the stopper 22d in a state where the plate member 22c is aligned with the scale. Similarly to the mounting surface portion 21a, the contact portion 22a is also provided with a non-slip member, so that even if the packaging box 10 is pulled by the flap portion strength measuring unit 23, the packaging box 10 remains on the flap portion strength measuring unit 23 side. It is difficult to move to.

  The flap part strength measuring part 23 includes a hook part 25 hooked to the outer flap 7 of the opposing flap part 9, a load measuring instrument 26 connected to the hook part 25, and a moving mechanism 27 connected to the load measuring instrument 26. And comprising. The hook portion 25 is bifurcated and each tip is L-shaped, and the tip is inserted into the gap 9 a between the outer flaps 7 in 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 packaging box 10 is held by the holding unit 22. 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. And the hook part 25 is connected with the measuring shaft 26 a, whereby the adhesive strength of the outer flap 7 can be measured via the hook part 25. The moving mechanism 27 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 drive unit 27b, the load measuring unit 26 can be moved along the longitudinal direction L, and when measuring the adhesive strength of the flap unit 9, the load measuring unit 26 is opposed to the opposing flap unit. 9 is moved in the direction of evacuation.

  Similarly to the flap portion strength measuring unit 23, the adhesive portion strength measuring unit 24 also has a hook portion 28 (corresponding to the second hook portion) hooked on the adhesive portion G, and a load measuring device 29 (first number) connected to the hook portion 28. 2) and a moving mechanism 30 (corresponding to the second moving mechanism) connected to the load measuring device 29. Similarly, the hook portion 28 is bifurcated and each tip is L-shaped. The tip is inserted into the gap of the bonding portion G and hooked on the bonding portion G. The load measuring device 29 is provided at a position facing the adhesive portion G of the packaging box 10 held by the holding portion 22. Similarly, the load measuring unit 29 has a measuring shaft 29a at its tip, and can measure the tensile force applied to the measuring shaft 29a. And the hook part 28 is connected with the measuring shaft 29 a, whereby the adhesive strength of the adhesive part G can be measured via the hook part 28. The moving mechanism 27 includes a slide member 30a connected to the load measuring unit 29, and a drive 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 bonding strength of the bonding unit G, the bonding unit G connects the load measuring unit 29 to the load measuring unit 29. Move to 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 unit allows the flap portion strength measuring unit 23 and the adhesive portion strength measuring unit 24 to perform basic operations, and the positions of the load measuring devices 26, 26, and 29 can be adjusted according to the size of the packaging box 10. (Details will be described later).

  Next, the adhesive strength measurement by the measuring device 20 will be described. First, the packaging box 10 to be measured is placed on the placement unit 21 of the measuring device 20, and then the packaging box 10 is held by the holding unit 22. And in order to measure the adhesive strength of each flap part 9,9, hook part 25,25 is each hooked on the upper or lower one of the outer flaps 7,7 of both flap parts 9,9. After that, for example, an operation button (not shown) is pressed to give a command to the control unit, and as shown in FIG. The load measuring devices 26, 26 are moved in directions to retract from the opposing flap portions 9, respectively. Then, the value measured by the load measuring devices 26 and 26 after peeling is defined as the adhesive strength at each of the flap portions 9 and 9. Then, hook portions 25 and 25 are respectively hooked on the other of the upper and lower sides of the outer flaps 7 and 7 of both flap portions 9 and 9, and the same thing is performed. Further, in order to measure the adhesive strength of the adhesive part G, the hook part 28 is hooked on the adhesive part G. Then, for example, an operation button (not shown) is pressed to give a command to the control unit, and the load measuring device 29 is peeled off by the moving mechanism 30 until the bonding unit G is peeled off as shown in FIG. The value measured by the load measuring device 29 after peeling is used as the adhesive strength at the adhesive portion G. In addition, the measurement of the adhesive strength of each flap part 9 and 9 may be performed simultaneously for both flaps 9 and 9, and may be performed separately. Further, the measurement of the adhesive strength of each of the flap portions 9 and 9 and the measurement of the adhesive strength of the adhesive portion G may be performed simultaneously or separately.

  Thus, in the measuring device 20 according to the present embodiment, the adhesive strength of both 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. And 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 that can move the mounting surface portion 21a up and down, and the load measuring device 29 is also increased by the moving mechanism 30. Since it is movable in the height direction H, it is possible to cope with the difference in height of the packaging box 10 by adjusting the position in the height direction H. Moreover, since each holding | maintenance part 22 is movable to the width direction W, it can respond also to the difference in the width of the packaging box 10 by adjusting the position of the width direction W. Since the load measuring device 26 can be moved in the longitudinal direction L by the moving mechanism 27, the length of the packaging box 10 can be accommodated by adjusting the longitudinal direction L.

  The load measuring devices 26, 26, and 29 are automatically moved to a position corresponding to the information by inputting information on the packaging box 10 (for example, dimensions and management number of the packaging box 10) to a control unit (not shown). It is like that. The other placement unit 21 and the holding unit 22 may be configured to automatically move according to a command from the control unit.

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

(1) In the above-described embodiment, the configuration in which the moving mechanisms 27 and 30 are connected to the power source and driven has been described as an example. 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) The above embodiment has been described by taking as an example a configuration in which the hook portions 25 and 28 are bifurcated and each tip is 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 forks and may be three or more forks.

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

  The present invention can be used to measure the adhesive strength of a packaging box that contains, for example, a beverage can.

DESCRIPTION OF SYMBOLS 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 instrument 27 Moving mechanism 28 Hook part (second hook part)
29 Load measuring device (second load measuring device)
30 Movement mechanism (second movement mechanism)

Claims (3)

Packaging boxes in which openings formed on both the left and right sides of a corrugated cardboard blank sheet formed into a cylindrical shape are respectively closed by a flap part in which at least one outer flap and at least one inner flap of the corrugated cardboard blank sheet are bonded to each other. A measuring device for measuring the adhesive strength in the flap part,
A holding unit for holding the packaging box;
A pair of hooks hooked to each outer flap;
A pair of load measuring devices provided at positions facing the respective flap portions in a state where the packaging box is held by the holding portion, and connected to the hook portions, respectively.
And a pair of moving mechanisms for moving each load measuring instrument in a direction of retreating from the opposing flap portion. A second hook portion hooked to an adhesive portion when the cardboard blank sheet is formed into a cylindrical shape;
A second load measuring device provided at a position facing the adhesive portion of the packaging box held by the holding portion and connected to the second hook portion;
The measuring apparatus according to claim 1, further comprising: a second moving mechanism that moves the second load measuring device in a direction in which the bonding portion is peeled off. The measuring apparatus 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.

Images