JP6163408B2 - Crimping mechanism - Google Patents

Description

  The present invention relates to a pressure bonding mechanism for a sheet such as corrugated cardboard, which corresponds to a case where the strength of repulsion changes as the position of a folding ruled line changes.

  In recent years, it has become common to order and purchase various products via the Internet, and as a result, mail orderers who have received orders will ship products of various sizes in boxes and send them to consumers. .

  At that time, if a box that can hold a large product is also used for packing a small product, the cardboard that is the material of the box will be used in excess, which will increase the packaging cost and will be charged according to the size of the box. When a variety of boxes corresponding to the size of a product are used, there is a problem that a great deal of cost is required for box management and packing for each type.

  As an example of countermeasures against such a situation, Patent Document 1 below proposes assembling a variable height box as shown in FIG.

  This height-variable box is composed of a cardboard base sheet 1 and a cover sheet 2. The base sheet 1 has side plates 12 and folding pieces 13 on both sides of a bottom plate 11 via a first ruled line a and a second ruled line b. It is assumed that the cover sheet 2 is sequentially provided, and the cover sheet 2 is configured such that side plates 22 and folding pieces 23 are sequentially provided on both sides of the top plate 21 via the first ruled line a and the second ruled line b. The product M is placed on the bottom plate 11 and is fixed by winding the film 14.

  Such a variable height box assembling apparatus supplies the base sheet 1 and the cover sheet 2 to be placed thereon, measures the height of the product M, and based on the measured value of the height, the base sheet 1 and The cover sheet 2 is provided with a second ruled line b by adjusting the distance from the first ruled line a on both sides, the base sheet 1 facing in the crossing direction is directed upward, and the cover sheet 2 is directed downward, respectively. It is bent so as to be wound along the two ruled lines b, both ends of the cover sheet 2 are pressed by a cylinder, and the adhesive sheet is applied to the bottom surface of the base sheet 1 by pressure.

International Publication No. 2013/1088829

  However, as described above, in the case of a packaging box assembly apparatus in which the height and width of the packaging box change corresponding to the size and shape of the contents and the position of the ruled line changes accordingly, conventionally, The cylinder was pressing the sheet with a constant pressing force and pressing amount without considering that the strength of repulsion of the ruled line changed with the change in position.

  For this reason, when the edge of the sheet is separated from the ruled line and the repulsion of the ruled line is weak, the pressing force of the cylinder is too strong, and the packaging box may be deformed as a whole.

  In addition, when the edge of the sheet is close to the ruled line and the repulsion of the ruled line is strong, the pressing force of the cylinder is insufficient, and the adhesion between the edge of the sheet bent along the ruled line and the adherend surface becomes insufficient. There was a risk of peeling.

  Accordingly, an object of the present invention is to provide a pressure-bonding mechanism capable of obtaining a reliable sealing property even when the strength of repulsion changes with the change in the position of a folding ruled line of a sheet such as cardboard.

  In order to solve the problems as described above, the present invention bends a sheet along a ruled line whose position from the leading edge changes, presses the leading edge side of the sheet from the ruled line by a pushing part operated by a cylinder, and applies an adhesive. In the pressure-bonding mechanism that presses the other side with the applied sticking part, the pressing force of the cylinder is changed for each of the plurality of cylinders according to the change in the strength of the repulsion of the ruled line accompanying the change in the ruled line position. When the repulsion is strong, a cylinder with a strong pressing force acts, and when the repulsion of the ruled line is weak, a cylinder with a weak pressing force acts.

  In addition, the pushing amount of the cylinder is changed according to the change in the strength of the repulsion of the ruled line due to the change of the ruled line position for each of the plurality of cylinders. When the repulsion of the ruled line is weak, a cylinder with a small pushing amount acts.

  Furthermore, the spring constant of the spring interposed between the action part of the cylinder and the pushing part is changed for each of the pushing parts according to the change in the strength of the ruled line repulsion accompanying the change in the ruled line position, When the repulsion of the ruled line is strong, the pushing part is pushed through a spring having a large spring constant, and when the repulsion of the ruled line is weak, the pushing part is pushed through a spring having a small spring constant. .

  In addition, the contact area of the indented part to the pressed surface is changed according to the change in the strength of the ruled line repulsion due to the change in the ruled line position for each of the plurality of pushed parts. In other words, when the pressed surface is pressed by a pressing component having a small contact area and the repulsion of the ruled line is weak, the pressed surface is pressed by a pressing component having a large contact area.

  Then, a base sheet on which the article is placed and a cover sheet to be placed on the base sheet are supplied, and the height of the article is measured. Adjust the distance from the ruled line to insert the second ruled line, bend it along the first ruled line and the second ruled line, press the both ends with the pressing parts that operate with the cylinder, and apply the adhesive In the assembling apparatus of the variable height box that is crimped to the other at the sticking portion, the crimping mechanism is applied to the second ruled line.

  According to the crimping mechanism according to the present invention, the pressing force of the cylinder is changed according to the change in the strength of repulsion accompanying the change in the position of the ruled line. While preventing the deformation of the box, the sheet folded along the ruled line can be securely adhered to the adherend surface, and the packaging box can be assembled in a packed state.

The perspective view which shows the whole outline of the packing process by the assembly apparatus of the variable height box provided with the crimping | compression-bonding mechanism based on this invention. Plan view showing the overall outline of the packing process (A) A perspective view showing a base sheet in which an article is fixed with a film, and (b) a perspective view showing a cover sheet. Height side view of the measuring section A ₁ and the width detection unit A ₂ of the same In the same width detection unit A ₂ , (a) the conveyance cross-direction vertical cross-sectional view showing a state in which an article having a specified width passes, (b) the conveyance cross-direction vertical showing a condition in which an article having an unspecified width is detected. Cross section In defining outer discharge section A ₃ of the same (a) conveying cross direction vertical sectional view articles in provisions showing a state that passes, (b) conveying cross direction vertical sectional view showing a state in which the specified outside of the article is discharged (A) Vertical cross-sectional view in the conveyance crossing direction explaining the operation of the crease forming section B, (b) Partial perspective view showing the base sheet with crease lines Vertical cross-sectional view in the conveyance crossing direction explaining the operation of the bent portion C (A) Vertical cross-sectional view in the conveyance crossing direction showing the step of spraying the adhesive for bonding the top part, (b) Perspective view showing the base sheet on which both sides are erected and the adhesive is applied In the same molding part D as above, (a) a cross-sectional vertical cross-sectional view showing a process of folding the folded piece of the base sheet inward and covering the cover sheet, (b) a crimping process of the cover sheet to the folded piece of the base sheet Vertical cross-sectional view in the crossing direction (A) The perspective view which shows the base sheet bent so that both sides may be wound, (b) The perspective view which shows the state which put the cover sheet on the base sheet, and was crimped | bonded by the top part The top view explaining operation | movement of the direction change part E same as the above Vertical cross-sectional view in the conveyance crossing direction explaining the operation of the ruled part F Horizontal sectional view showing the bending process of the bent piece of the base sheet Conveyance cross direction vertical sectional view for explaining the operation of the bent portion G (A) horizontal sectional view and (b) conveying direction vertical sectional view showing the film heating / cooling mechanism of the bent portion G of the above Bottom view of variable height box showing through-holes in the same film (A) Vertical cross-sectional view in the conveying direction showing the step of applying an adhesive to the bottom surface of the variable height box, (b) Bottom view of the variable height box with the adhesive applied The top view which shows the forming part H same as the above Conveyance cross direction vertical sectional view explaining bending operation of forming part H same as above Vertical cross-sectional view in the conveying direction for explaining the crimping operation of the molding part H Vertical cross-sectional view in the crossing direction of conveyance explaining the crimping operation of the molding part H when the height of the variable height box is low The perspective view which shows the packing state where the height of a height variable box same as the above is low Vertical cross-sectional view in the crossing direction for explaining the crimping operation of the forming part H when the height variable box is tall The perspective view which shows the packing state with the tall height variable box same as the above (A) Packing process of variable height box by conventional assembly device, (b) Perspective view showing packing state

  In the embodiment shown below, the assembly device shown in FIGS. 1 and 2 is used to send out by mail order or the like by the variable height box composed of the cardboard base sheet 1 and the cover sheet 2 shown in FIG. A case where the product M is packed will be described.

  As shown in FIG. 3A, the base sheet 1 has a first ruled line “a” spaced from the side edges on both sides of the bottom plate 11, and the product M placed on the bottom plate 11 is fixed by winding the film 14. In this state, it is supplied to the assembly apparatus. The film 14 is not limited to a heat-shrinkable film, and a film that holds the product M with a tensile force can be used.

  In addition, the base sheet 1 is provided with bent pieces 15 that project from the position of the first ruled line a to both ends through the perforated crease line c, and are formed on the side edges of the bottom plate 11. A concave portion 16 for hooking and positioning the film 14 is formed at a portion close to the one ruled line a.

  As shown in FIG. 3B, the cover sheet 2 is supplied to the assembling apparatus in a state where the first ruled line a is put on both sides of the top plate 21 with a gap from the side edge. The cover sheet 2 is provided with a cut line that is cut at the time of opening at both ends of the top plate 21, and an adhesive portion 24 is provided inside the cover sheet 2. Is provided. The tear band 25 is made of a perforated cut line or a cut tape.

  Further, the cover sheet 2 is provided with a protruding portion 26 that protrudes from the position of the first ruled line a to the position beyond the tear band 25.

  Next, a process of assembling a variable height box from the base sheet 1 and the cover sheet 2 and packing the product M by an assembly apparatus as shown in FIGS. 1 and 2 equipped with the crimping mechanism according to the present invention will be described. .

This assembling apparatus includes a height measuring unit A ₁ , a width detecting unit A ₂ , an unspecified discharge unit A ₃ , a crease B, a bent part C, a molding part D, a direction changing part E, a crease F, The curved line G and the molded part H are sequentially arranged to constitute a packing line.

As shown in FIG. 4, the base sheet 1 supplied from the upstream process is placed on the conveyor 31, transported to the height measuring unit A <b> ₁ , and adjusted in direction by the orientation plate 32 that moves up and down, and then the conveyor 31. And the position of the phototube type sensor 33 provided on both sides of the product M, the height of the product M is measured. In addition, as a height detection mechanism, a contact type thing and the thing determined by the image image | photographed with the camera can also be used.

Next, as shown in FIGS. 4 and 5, the base sheet 1, with the progress of the width detector A _2, the positioning plate 34 to advance and retreat with respect to both ends, positioning in the width direction on the conveyor 31 Then, the direction is adjusted again by the direction plate 35 that moves up and down, and passes through the positions of the two width detecting rods 36 that hang down in the conveyance direction. The interval between the two width detection rods 36 is set to the critical dimension of a product that can be packed, and the swing of the width detection rod 36 is detected by a sensor 36a.

At this time, as shown in FIG. 5 (a), if the width of the product M is less than the critical dimension, without product M is in contact with the width detection rod 36, the base sheet 1, passing through the width detector A ₂ To do.

On the other hand, as shown in FIG. 5B, if the width of the product M is partly larger than the critical dimension, the product M comes into contact with the width detection rod 36, and the width detection rod 36 swings, and the swing is detected. The movement is detected by the sensor 36a. In this case, it does not pass through the differential detector A ₂ of the base sheet 1 is prevented.

Then, at a defined outer discharge section A _3, as shown in FIG. 6 (a), if the height and width of the product M is less than the critical dimension, the base sheet 1 is conveyed to the next step.

  On the other hand, as shown in FIG. 6 (b), if at least one of the height and width of the product M is larger than the critical dimension, the base sheet 1 is lifted from the conveyor 31 by the lift mechanism 37, and the payout arm 38 is pushed out to the dispensing part 39 on the side of the packing line, so that the trouble that the packing becomes impossible in the subsequent process is avoided.

The base sheet 1 which has passed through the defined outer discharge section A _3, as shown in FIG. 7 (a), rests on the three parallel rails 40, ruling insertion is held in the transport pawl 41 to move along with the traveling of the chain It is conveyed to part B.

The ruling insertion portion B, on the basis of height height measurement values of the measured product M by the measurement unit A _1, a pair of ruffled Nyugu 43 to lift against the opposite sides of the bracket as 42 in the width direction of the packaging line The distance from the first ruled line a is adjusted between the first ruled line a and the side edge of the base sheet 1 so that the second ruled line b is put in parallel with the first ruled line a. Between the 1st ruled line a and the 2nd ruled line b of the base sheet 1, it becomes the side board 12, and between the 2nd ruled line b and the side edge becomes the folding piece 13 (refer FIG.7 (b)).

  At this time, the second ruled line b is formed on the side plate 12 and the folded pieces 15 on both sides of the folded piece 13 by means of cutting blades provided integrally at both ends of the ruled tool 43 as shown in FIG. The notch d is made so as to be located on the extension line.

  Then, as shown in FIG. 7A, in a state where the position of the second ruled line b of the base sheet 1 is pressed by the ruler 43, the presser 44 is raised and the folding piece 13 is pre-folded. .

  Next, as shown in FIG. 8, the base sheet 1 is conveyed to the bent portion C. In the bent portion C, the pair of pushers 46 rise obliquely inward with the bending guide 45 being along the portions facing the first ruled lines a on both sides on the upper surface side of the bottom plate 11, and the side plate 12 is The side plate 12 and the folded piece 13 are brought into an upright state by being bent in the standing direction about the one ruled line a, the tip of the folded piece 13 abutting against the receiving piece 47 positioned above the folding guide 45.

Subsequently, as shown in FIG. 9A, the side plate 12 and the folded piece 13 are measured by the height measuring unit A ₁ in a state where the side plate 12 and the folded piece 13 are vertically supported by the support members 48 along the inner surface and the outer surface of the side plate 12. Based on the measured value of the height of the product M, the pair of adhesive nozzles 49 facing the outer surface of the folded piece 13 is moved up and down, and the hot melt from the adhesive nozzle 49 is moved to the portion of the folded piece 13 near the second ruled line b. The adhesive 17 is sprayed. At this time, the base sheet 1 continues to travel in the transport direction, and the adhesive 17 is applied in an intermittent line as shown in FIG.

Next, as illustrated in FIG. 10A, the base sheet 1 is conveyed to the forming unit D. The molding section D, in a state where the side plate 12 is vertically supported by the support member 48, on the basis of height height measurement values of the measured product M by the measurement unit A _1, the driving portion of the folding arm 50 lifting At the same time, the side plate 12 is approached from the side, and the folding piece 13 is bent inwardly in the horizontal direction about the second ruled line b as the folding arm 50 falls from the standing state. At this time, the bending arm 50 presses the interrupted portion of the adhesive 17 on the surface of the folding piece 13.

  Thereby, as shown to Fig.11 (a), the base sheet 1 will be in the state by which the side plate 12 and the folding piece 13 of the both sides were wound in from the bottom plate 11. FIG.

  Next, the cover sheet 2 is adsorbed and taken out by a manipulator adsorbent 51 from a magazine (see FIG. 1) provided on the side of the molding part D, and the top plate 21 is positioned above the folding piece 13. As shown in FIG. 10B, the top plate 21 is pressure-bonded to the folding piece 13 as the adsorbent 51 is lowered. At this time, the bending arm 50 is retracted in the direction away from the side plate 12 and returned to the standing state.

  In this way, in the variable height box in which the cover sheet 2 is covered with the base sheet 1, as shown in FIG. 11 (b), the folding piece 13 and the ceiling are within the range of the sticking portion 24 of the cover sheet 2. The plate 21 is pressure-bonded with the adhesive 17.

  Then, as shown in FIG. 12, the variable height box is conveyed to the direction changing section E. In the direction changing portion E, the variable height box is transferred from the rail 40 to the lift plate 54 having a small surface friction coefficient and lifted, and the suction portion 53 on the tip side of the swivel arm 52 is in close contact with the side surface of the base sheet 1. As the turning arm 52 turns, the direction of 90 ° is changed on the lift plate 54. Thereafter, the adsorbing portion 53 moves away from the side surface of the base sheet 1, and as the lift plate 54 descends, the height-variable box is lowered onto the two parallel rails 55 extending to the subsequent process. It is held by the moving conveyance claw 56.

The height-variable box whose direction has been changed in this way is conveyed to the crease F as shown in FIG. The ruling insertion section F, on both sides of the packaging line, each pair of receiving fixture 57 for integrally lift diagonally, are provided ruffled Nyugu 58 and押当Ko 59, these height measurement unit A ₁ Based on the measured value of the height of the commodity M, it approaches when descending and separates when ascending.

  Then, the distance from the first ruled line a is adjusted between the first ruled line a and the side edge of the cover sheet 2 by the pair of ruled fittings 58 that move up and down with respect to the receiving tools 57 on both sides, and the second The ruled line b is put in parallel to the first ruled line a. A side plate 22 is formed between the first ruled line a and the second ruled line b of the cover sheet 2, and a folded piece 23 is formed between the second ruled line b and the side edge.

  Thereafter, in a state where the position of the second ruled line b of the cover sheet 2 is pressed by the ruler 58, the presser 59 is lowered, and the folding piece 23 is pre-folded around the second ruled line b.

  Further, as shown in FIGS. 13 and 14, the crease portion F is provided with corner folding members 60 corresponding to the four corners of the variable height box so as to be movable up and down. The member 60 is raised, and the portion extending from the side plate 12 of the bent piece 15 is preliminarily folded outward about the crease line c.

  Next, as shown in FIGS. 15 and 16, the variable height box is conveyed to the bent portion G. At the bent portion G, the side plate 22 is bent downward about the first ruled line a by the pair of pressing elements 61 moving in an oblique direction with respect to both side portions of the cover sheet 2, and swings with respect to the side plate 22. The side plate 22 is held in a state where it is bent downward by the pressing element 62.

  At this time, the bent pieces 15 at the four corners of the base sheet 1 are separated by the cuts d, and the bent portions 15 are bent to the outside so that the portions extending from the side plates 12 are along the inner surfaces of the protruding portions 26 of the side plates 22. Since the portion extending from the folding piece 13 of the bent piece 15 bends downward and follows the inner surface of the side plate 22, the gap between the base sheet 1 and the cover sheet 2 at the ridge portion of the box is closed, and the side plate 22 The bent state is stable.

As shown in FIGS. 15 and 16, the bent portion G is provided with a hot air nozzle 63 and a cold air nozzle 64 as a film heating / cooling mechanism below the bent portion G. Hot air nozzles 63 are those having a slit-shaped outlet are spaced two pairs conveyance direction, based on the height height measurement values of the measured product M by the measurement unit A _1, and movable up and down Has been. A plurality of the cold air nozzles 64 are arranged in the blowing direction of the hot air nozzle 63.

  In this film heating / cooling mechanism, hot air is blown from the hot air nozzle 63 to the film 14 that wraps around the lower surface of the bottom plate 11 of the base sheet 1 to melt the film 14, and as shown in FIG. Open.

  At this time, since it is necessary to heat the film 14 to a temperature higher than the melting point, the bottom plate 11 becomes very high in the range corresponding to the range of the through hole 14a and the periphery thereof, and the bottom plate 11 is passed through the through hole 14a in a later process. When a hot-melt adhesive is applied, the solidification time (set time) of the adhesive becomes long, and there is a problem that the packaging efficiency is lowered.

  As a countermeasure, in this assembling apparatus, as shown in FIG. 16 (b), cold air is blown from the cold air nozzle 64 to the portion of the through hole 14a and the periphery thereof to cool the bottom plate 11, and the temperature of the bottom plate 11 is lowered. The set time is shortened.

  Then, as shown in FIG. 18A, the variable height box sent out from the bent portion G passes above the adhesive nozzle 65, and the hot melt adhesive 18 passes through the adhesive nozzle 65. It sprays on the baseplate 11 through 14a. At this time, the variable height box continues to advance in the transport direction, and as shown in FIG. 18B, the adhesive 18 is applied in the form of two parallel lines in the range of the through hole 14a.

  In addition, as a means for opening the through-hole 14a in the film 14, it is possible to apply a means for pressing the heater against the film 14 or a means for cutting the film 14 with a punch.

  Further, the hot melt adhesive is set at a temperature higher than the melting point of the film 14 and sprayed from below onto the film 14 that has wrapped around the bottom surface of the bottom plate 11, so that the film 14 is melted by the adhesive and the through holes 14 a are opened. Also good. At this time, if the film 14 is heated in advance prior to the spraying of the adhesive, the adhesive is easily transmitted to the base sheet 1.

  Next, the variable height box is conveyed to a forming part H as shown in FIGS. In the forming part H, the variable height box is received only by one rail 66 located at the center of the packing line so that the folding of the folding pieces 23 on both sides is not hindered. The side plates 22 on both sides are pressed by a pair of lateral pressing members 68 that come in contact with and separated from the side, and are held so as not to fall down.

  Then, as shown in FIG. 20, the pair of pressing members 69 are lifted obliquely inward, and the pressing is performed in a state where the lower portion of the side plate 22 is strongly pressed from the side by the pressing element 69a of the pressing member 69. The folding piece 23 is bent inward about the second ruled line b by the pressing element 69b of the member 69.

  Moreover, as shown in FIGS. 19-21, the shaping | molding part H is provided with the bottom part crimping | compression-bonding mechanism. In the bottom crimping mechanism, the pair of pin bases 71 and 72 are arranged side by side on the outside and inside by being supported by the base 70 that moves up and down below the variable height box. It can be lifted and lowered by its own cylinder.

  A total of four pins 73 are arranged on the outer pin base 71 so that two pins 73 are arranged in each of the conveying direction and the direction crossing the pin 73, and the pin 74 is arranged on the inner pin base 72 in the conveying direction and the direction. A total of six are arranged so that three and two are arranged in the direction in which they are placed.

  The pins 73 and 74 are pushing parts, and coil springs 75 are fitted on the shaft portions thereof. The coil spring 75 is interposed as a cushion between the heads of the pins 73 and 74 and the upper surfaces of the pin bases 71 and 72, and enhances the followability of the pressed surface to the level difference and the curvature.

  When the pin bases 71 and 72 are moved up and down by the individual cylinders, the heads of the pins 73 and 74 appear and disappear with respect to the bottom abutment plate 76 supported by the column rising from the base 70, and the base 70 is lifted up. Accordingly, the pin bases 71 and 72 are raised in a state where the folding piece 23 is bent substantially horizontally by the bottom abutment plate 76, so that the pins 73 and 74 protrude from the bottom abutment plate 76, and the pins 73 and 74. The head pushes up the folding piece 23.

  Thus, the folded piece 23 is pressed against the bottom plate 11 through the through hole 14 a of the film 14, and the bottom plate 11 and the folded piece 23 are securely bonded by the adhesive 18. At this time, the bottom plate 11 and the folded piece 23 are bonded to each other on the edge side from the tear strip 25.

  In addition, as shown in FIG. 21, a hammer member 77 that moves up and down independently of the upper pressing member 67 is provided on the central portion of the upper pressing member 67. The upper pressing member 67 is strongly pressed down by colliding with 67 to further increase the pressure-bonding force.

  In addition, a back pushing arm 78 is swingably provided behind the variable height box in the conveying direction, and the variable height box is in a state where the front surface of the variable height box is in contact with the tall conveying claw 56. By pushing the rear surface with the pushing arm 78, the side plate 12 which is going to fall outward is corrected to an upright state, and the positional deviation of the top plate 21 with respect to the front and rear side plates 12 is corrected.

  Here, as shown in FIG. 22, when the height of the product M is low and the height of the variable height box is low, the length of the folding piece 23 from the second ruled line b becomes long. Both the outer and inner pin bases 71 and 72 are raised, and the pins 73 and 74 are projected.

  However, in this case, since the repulsion of the second ruled line b is weak and the folding piece 23 can be bent with a relatively small bending force, if the pressing force of the pins 73 and 74 is too strong, the variable height box is entirely In particular, when the product M is light or small, the center side of the bottom plate 11 is pushed up by the pin 74, and this tendency becomes remarkable.

  Therefore, for each cylinder that projects the pins 73 and 74, or at least for the cylinder that projects the pin 74, the pressing force is weakened, the amount of pushing is reduced, or both are adjusted to the high setting. If the deformation of the variable height box is prevented, as shown in FIG. 23, the variable height box can be reliably assembled to a short rectangular parallelepiped.

  On the other hand, as shown in FIG. 24, when the height of the product M is high and the height of the variable height box is high, the length of the folding piece 23 from the second ruled line b is shortened. Only the pin base 71 is raised and the pin 73 is protruded.

  In this case, the repulsion of the second ruled line b is strong, and the folding piece 23 is peeled off from the bottom plate 11 unless it is bent with a large bending force. Therefore, the pressing force of the cylinder for projecting the pin 73 is increased, or the pushing amount When the folding piece 23 is strongly pressure-bonded to the bottom plate 11 by adjusting the setting to be large or both, as shown in FIG. 25, the variable height box can be reliably assembled to a tall rectangular parallelepiped. .

  In addition to adjusting the pressing force of the cylinder that projects the pins 73 and 74 as described above, the spring constant of the coil spring 75 may be changed according to the strength of repulsion of the second ruled line b. Specifically, the spring constant of the coil spring 75 of the pin 73 close to the second ruled line b may be set large, and the spring constant of the pin 74 far from the second ruled line b may be set small.

  Further, the pins 73 and 74 are not only intensively arranged, but the arrangement thereof is arbitrary, for example, alternately arranged.

  Moreover, you may change the area of the head upper surface of the pins 73 and 74 which contact | abut the folding piece 23. FIG. Specifically, the area of the top surface of the head of the pin 73 close to the second ruled line b is reduced to concentrate the pressing force on the portion of the adhesive 18, and the area of the top surface of the head of the pin 74 far from the second ruled line b. It is better to spread the pressing force over a wide range. Further, instead of the cylindrical pin 74, a plate-like body having a large flat area may be moved up and down by the cylinder as a pressing part.

  According to the assembling method and apparatus as described above, the base sheet 1 and the cover are adjusted by adjusting the position of the second ruled line b in the base sheet 1 and the cover sheet 2 of the variable height box based on the measured value of the height of the product M. Since the sheet 2 is folded and sealed so as to be rolled up, the height can be changed steplessly for each product M to be packed, and the box can be made to the sealed state, reducing the cost required for packing, and as much as possible the internal gap By reducing the size, the costs associated with delivery can be reduced.

  Further, after the through hole 14a is formed in the film 14 by heating and melting, the bottom plate 11 of the base sheet 1 is cooled by blowing cold air to the portion of the through hole 14a, and then the adhesive 18 is passed through the through hole 14a. Since the folding piece 23 of the cover sheet 2 is attached to the bottom plate 11, the set time for solidifying the adhesive 18 can be shortened, and the packing efficiency can be improved.

  Furthermore, since the pressing force of the cylinder that presses the folding piece 23 against the bottom plate 11 is adjusted according to the strength of repulsion of the second ruled line b of the cover sheet 2, the height of the variable height box is adjusted. Even if the change occurs, the folded piece 23 is securely crimped to the bottom plate 11.

  In the above embodiment, the hot melt adhesive is applied to the folded piece 13 and the top plate 21 and the folded piece 13 are pressure-bonded. However, when the folded piece 13 is sufficiently long, the folded piece 13 is used. Even if the application of the hot melt adhesive is omitted, the folded piece 13 does not come out from below the top plate 21, and the sealed state can be maintained.

  In addition, as an example of the assembling apparatus, the base sheet 1 and the cover sheet 2 in which the first ruled line a is previously provided are supplied, and the second ruled line b is provided in the ruled parts B and F, but the first ruled line a and The base sheet 1 and the cover sheet 2 that are not included in the second ruled line b may be supplied, and the first ruled line a and the second ruled line b may be put together in the ruled parts B and F.

  Moreover, although the example which puts the 1st ruled line a and the 2nd ruled line b in both the base sheet 1 and the cover sheet 2 was illustrated, when the product M is a boxed one or a book, the first ruled line only on the cover sheet 2 a and the second ruled line b are inserted, the base sheet 1 is not folded, the cover sheet 2 is placed so as to be placed on the product M, this is folded so as to be wound along the first ruled line a and the second ruled line b, and both ends thereof The part may be attached to the base sheet 1.

  Further, in this case, the cover sheet 2 has a cross shape in which the side plate 22 and the folding piece 23 are sequentially arranged on the four sides around the top plate 21, and the folding piece 23 connected to the pair of side plates 22 is described above. In this way, the film 14 is passed through and attached to the outer surface of the bottom plate 11, and the folding piece 23 connected to the other pair of side plates 22 is directly attached to the outer surface of the bottom plate 11 without sandwiching the film 14. May be.

  In addition, the first ruled line a and the second ruled line b are put only in the base sheet 1, the base sheet 1 is bent so as to be wound along the first ruled line a and the second ruled line b, and the cover sheet 2 is not bent. Covering the folded piece 13 of the sheet 1 and attaching the folded piece 13 to the cover sheet 2, so as to cope with the change in the resilience of the second ruled line b of the base sheet 1. The crimping mechanism as described above may be applied to the assembling apparatus.

  Further, in the above embodiment, the height variable box using the base sheet 1 and the cover sheet 2 is illustrated, but the above crimping mechanism is also applied to variable boxes of various shapes using a single piece of cardboard sheet with a plurality of ruled lines. Can do.

  The above crimping mechanism can be applied not only when the second ruled line b is a single straight line, but also when the second ruled line b has a V-shape or a curved portion.

DESCRIPTION OF SYMBOLS 1 Base sheet 2 Cover sheet 11 Bottom plate 12 Side plate 13 Folding piece 14 Film 14a Through hole 15 Folding piece 16 Recess 17, 18 Adhesive 21 Top plate 22 Side plate 23 Folding piece 24 Adhering part 25 Tear strip 26 Protruding part a 1st Ruled line b Second ruled line c Folded line d Cut A ₁ Height measurement part A ₂ Width detection part A ₃ Unspecified discharge part B Ruled part C Folded part D Molded part E Direction change part F Ruled part G Folded Part H Molding part 31 Conveyor 32 Orientation plate 33 Sensor 34 Positioning plate 35 Orientation plate 36 Width detection rod 36a Sensor 37 Lift mechanism 38 Dispensing arm 39 Dispensing part 40 Rail 41 Conveying claw 42 Receiving tool 43 Ruled tool 44 Pushing element 45 Bending guide 46 Pushing piece 47 Receiving piece 48 Support member 49 Adhesive nozzle 50 Bending arm 51 Adsorbing body 52 Revolving arm 53 Adsorbing part 54 Lift plate 55 Rail 56 Transporting claw 57 Receiving tool 5 8 Folding tool 59 Pusher 60 Corner folding member 61, 62 Pusher 63 Hot air nozzle 64 Cold air nozzle 65 Adhesive nozzle 66 Rail 67 Upper pushing member 68 Lateral pushing member 69 Pushing members 69a, 69b Pusher 70 base Base 71, 72 Pin base 73, 74 Pin 75 Coil spring 76 Bottom contact plate 77 Hammer member 78 Booster arm M Product

Claims (5)

Folded along the ruled line which changes the position of the sheet from the tip, and pressed by a plurality of push part operating respectively the leading side of the sheet borders a plurality of cylinders, while the crimped adhesive portion coated with adhesive In the crimping mechanism to
For each cylinder, the cylinder pressing force is changed according to the change in the strength of the ruled line repulsion due to the change in the ruled line position. A crimping mechanism characterized in that when the repulsion of the ruled line is weak, a cylinder with a weak pressing force acts. Folded along the ruled line which changes the position of the sheet from the tip, and pressed by a plurality of push part operating respectively the leading side of the sheet borders a plurality of cylinders, while the crimped adhesive portion coated with adhesive In the crimping mechanism to
The cylinder push amount is changed for each cylinder according to the change in the repulsion strength of the ruled line due to the change in the ruled line position. A crimping mechanism characterized in that when the repulsion of the ruled line is weak, a cylinder with a small pushing amount acts. Folded along the ruled line which changes the position of the sheet from the tip, and pressed by a plurality of push part operating respectively the leading side of the sheet borders a plurality of cylinders, while the crimped adhesive portion coated with adhesive In the crimping mechanism to
The spring constant of the spring interposed between the action part of the cylinder and the pushing part is changed for each of the pushing parts in accordance with the change in the strength of the repulsion of the ruled line due to the change in the ruled line position. When the repulsion is strong, the push-in component is pushed in through a spring with a large spring constant, and when the repulsion of the ruled line is weak, the push-in component is pushed in through a spring with a small spring constant. Crimping mechanism to do. Folded along the ruled line which changes the position of the sheet from the tip, and pressed by a plurality of push part operating respectively the leading side of the sheet borders a plurality of cylinders, while the crimped adhesive portion coated with adhesive In the crimping mechanism to
If the contact area of the pressed part to the pressed surface is changed according to the change in the strength of the ruled line repulsion due to the change in the ruled line position for each of the plurality of pressed parts, A pressure-bonding mechanism characterized in that when a pressed surface is pressed by a pressing part having a small contact area and the repulsion of a ruled line is weak, the pressed surface is pressed by a pressing part having a large contact area.   A base sheet (1) on which an article is placed and a cover sheet (2) to be placed on the base sheet (2) are supplied, the height of the article is measured, and the base sheet (1) and the cover sheet (2) are measured based on the measured height. ), Adjust the distance from the first ruled line (a) on both sides to place the second ruled line (b), and wrap it along the first ruled line (a) and the second ruled line (b) This is applied to the second ruled line (b) in an assembling apparatus for a variable height box that is bent into two parts, pressed at both ends by pressing parts that are operated by a cylinder, and crimped to the other with an adhesive-applied part. The crimping | compression-bonding mechanism in any one of Claims 1 thru | or 4.

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