JP7130248B2 - Box making device - Google Patents

Description

The present invention relates to a box making apparatus.

For example, as an example of the form of a body box for storing articles, there is a box having a double wall around the bottom surface and a narrow belt-shaped frame piece on the upper part, as disclosed in Patent Document 1 and the like. The box-making apparatus disclosed in Patent Document 1 appropriately folds the unfolded blank sheet to manufacture a box of a desired shape. The box-making device disclosed in Patent Document 1 is in a state in which the inner side (the position closer to the center of the bottom surface) than the fold line formed at the boundary between the bottom surface and the flap that constitutes the double wall is held down by the upper die. , the blank sheet is moved downward and inserted into the frame of the lower die. As a result, the flap is raised by the lower die, and the fold line is bent at the fold line to form the double wall in a form that is perpendicular to the bottom surface. When the double wall is erected in this manner, the outer peripheral surface of the double wall is erected on the peripheral edge of the bottom surface, and the inner wall of the double wall is positioned inside by the amount of the frame piece. Then, the inner peripheral surface is in a state of being close to the upper die. After that, the upper die moves straight up relative to the box and is positioned outside the box. Considering the width of the frame piece, the upper mold is positioned inside the folding line by a predetermined distance toward the center, so that the upper mold does not interfere with the double wall during the relative upward movement. move smoothly without

Patent No. 6041101

As described above, the conventional box-making apparatus presses the blank sheet against the lower die in a state where the upper die is in contact with the inner side of the folding line provided on the periphery of the bottom surface by the width dimension of the frame piece to make a box. Therefore, it cannot be neatly folded at the folding line position, and it may be folded from an unintended position, resulting in failure to neatly form a box.

The above-described problems are described as independent ones, and the present invention does not necessarily have to be able to solve all of the described problems, and it is sufficient if at least one of the problems can be solved. In addition, we intend to obtain the right for the configuration to solve this problem by filing a divisional application or making an amendment.

In order to solve the above-described problems, the box-making apparatus of the present invention is provided with a first flap forming side walls on a pair of opposite sides of a rectangular bottom surface, and a second flap forming side walls on another pair of opposite sides. A box-making device for forming a box by folding a predetermined position of a blank sheet in an unfolded state having two flaps in succession, wherein the first flap extends from the opposite side of the bottom surface to the first outer wall, the first A frame piece and a first inner wall are continuously provided, and a boundary portion between the first outer wall and the first frame piece and a boundary portion between the first frame piece and the first inner wall are bent to form the first a first guide member that is supplied to the box manufacturing device in a posture in which one inner wall is folded back and overlaps the first outer wall, and contacts the bottom surface of the supplied blank sheet from above; a lower mold that contacts the lower surface of the first outer wall; the first guide member has a function of moving up and down and a function of moving in a predetermined horizontal direction; The lower end of the first guide member contacts the bottom surface at a position along the side of the bottom surface connected to the first flap. In this state, the blank sheet is moved downward to bend the side portion to raise the first outer wall, and in a state in which the first guide member is moved away from the side, the blank sheet is moved downward. On the premise that the first guide member is configured to move upward, each component shown below is appropriately provided .

By providing the function of moving the first guide member in a predetermined horizontal direction, the first guide member is brought into contact with the bottom surface of the blank sheet and in the immediate vicinity of the boundary between the bottom surface and the first outer wall. , the blank sheet can be folded at the boundary portion to raise the first outer wall, and the first inner wall can be positioned inside the raised first outer wall by the width of the first frame piece Without interference, the first guide member can be moved out of the boxed box to remove the mold.

(2) The first guide member may include a connecting plate extending downward, and a first guide portion connected to a surface on the lower end side of the connecting plate on the side of the first flap. In this way, the connecting plate is located inside the first guide portion (the center side of the bottom surface), for example, in a state where the first guide portion urges the tip/lower end of the first inner wall toward the side of the bottom surface. , the connecting plate can prevent the first frame piece from pushing outward, and the first outer wall can maintain an upright posture.

(3) The first flap has a first locking piece that is continuous with the first frame piece on the non-connecting side, and the first locking piece is attached to the box making device in a posture in which the tip is flipped up. and the first guide member approaches the side by moving in the horizontal direction from a position away from the side of the bottom surface to engage the first locking piece and the first inner wall. is positioned on the side of the side. With this configuration, the first locking piece following the first inner wall can be positioned along the bottom surface, and the first inner wall and, by extension, the first outer wall can be positioned in an upright position.

(4) The second flap has a second outer wall, a second frame piece, and a second inner wall continuously from the opposite side of the bottom surface, and the second outer wall, the second frame piece, and the A second guide member that contacts the bottom surface of the supplied blank sheet from above and the bottom surface of the second outer wall that is supplied to the box-making device with the second inner wall extending. and a lower mold for moving the blank sheet downward while the lower end of the second guide member is in contact with the bottom surface at a position along the side connected to the second flap of the bottom surface. Then, the second outer wall, the second frame piece, and the second inner wall are bent by bending at the side portions, and the second frame piece in the erected posture is urged to a pusher member that bends a boundary portion between the second outer wall and the second frame piece; and a pusher member that urges downward the second inner wall that extends together with the second frame piece that is bent by the pusher member to press the second frame piece. and a bending member for bending the boundary portion of the second inner wall.

In this way, a double-walled box having an outer wall and an inner wall in which all four side walls are connected by frame pieces can be folded at a desired position and formed neatly.

(5) The pusher members may be arranged on both sides of the second flap in the longitudinal direction, and the folding member may be arranged in the center of the second flap in the longitudinal direction. With this configuration, the second frame piece of the second flap can be neatly folded at the boundary with the first outer wall.

(6) The pusher member has a first restraining portion extending in the vertical direction and a second restraining portion projecting forward from the upper end of the first restraining portion. The height is set so as to face the boundary portion between the second outer wall and the second frame piece, and when the pusher member moves forward toward the second frame piece, the second restraining portion is moved to the contacting and biasing the second frame piece, bending at the boundary portion between the second outer wall and the second frame piece so as to lay down the second frame piece and the second inner wall; It is preferable that the lower surface of the second restraining portion is configured to contact the upper surface of the second frame piece. In this way, the second frame piece of the second flap can be neatly folded at the boundary portion with the first outer wall, and the second frame piece is prevented from being lifted when the second inner wall is folded. It can be neatly folded at the boundary between the second inner wall and the second frame piece.

According to the present invention, when erecting the first outer wall, the boundary between the bottom surface and the first outer wall can be neatly folded.

It is a figure which shows an example of the blank sheet of the object to be box-made by the box-making apparatus which concerns on this invention, and the box to be box-made. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing an upper mold device used in a preferred embodiment of a box making device according to the present invention, (a) is a side view (illustration of the second guide member side is omitted), (b) is a front view, ( c) is a plan view (illustration of a mechanism for horizontally moving the base member and the first guide member is omitted). It is a figure explaining the effect|action and function which manufactures a 1st flap into a box. It is a figure explaining the effect|action and function which carton-makes a 2nd flap.

Preferred embodiments of the present invention will now be described in detail with reference to the drawings. It should be noted that the present invention is not to be construed as being limited to this, and various changes, modifications, and improvements can be made based on the knowledge of those skilled in the art without departing from the scope of the present invention.

FIG. 1 shows an example of a box 10 assembled and box-manufactured by a box-manufacturing apparatus according to the present invention. As shown in FIG. 1(a), the blank sheet 1 in the unfolded state has flaps forming side walls continuously on the four sides of a rectangular bottom surface 2. As shown in FIG. Each flap has a first flap 3 continuous with a pair of long sides of the bottom surface 2 and a second flap 4 continuous with a pair of short sides of the bottom surface 2 . The first flap 3 has a first outer wall 3a, a first frame piece 3b, a first inner wall 3c, and a first locking piece 3d continuously formed from the long side of the bottom surface 2. As shown in FIG. Similarly, the second flap 4 has a second outer wall 4a, a second frame piece 4b, a second inner wall 4c, and a second locking piece 4d continuously formed from the short side of the bottom surface 2. As shown in FIG. A fold line 5 is formed at a portion to be folded, such as a boundary of each portion, so that valley fold or mountain fold can be easily performed at the fold line 5 portion. Folding lines are also called crease lines.

In addition, the first folding pieces 6 are arranged on the short sides of both longitudinal ends of the first outer wall 3a via the folding lines 5, and the second folding pieces 6 are disposed on the short sides of the longitudinal ends of the second outer wall 4a via the folding lines 5. Placing the folded piece 7 . The first folding piece 6 and the second folding piece 7 are connected via an oblique folding line 5 . Further, tabs 8 are arranged on both short sides of the first inner wall 3c in the longitudinal direction with folding lines 5 interposed therebetween.

The box-making apparatus of this embodiment is an apparatus for forming a box 10 shown in FIG. 1(c) by appropriately folding the blank sheet 1 shown in FIG. 1(a) along folding lines 5 described above. The unfolded blank sheets 1 are accumulated and stored in a hopper, taken out one by one from the hopper, and supplied to a conveying line. Then, the supplied blank sheet 1 moves on the conveying line and is set in the box making apparatus of the present embodiment.

FIG. 2 shows an example of an upper mold device 11 which is a component of one embodiment of a box making apparatus according to the present invention. A mold 12 is placed. The upper die device 11 has a configuration in which a first guide member 15 and a second guide member 16 are arranged below a base member 13 which is vertically moved by a drive mechanism (not shown). The base member 13 has an elongated band plate shape, and a pair of first guide members 15 are arranged on both longitudinal end sides thereof.

The first guide member 15 is attached to the base member 13 so as to be reciprocatable along the longitudinal direction of the base member 13 . Specifically, guide rails 18 are attached to the lower surface near both ends of the base member 13 so as to extend along the longitudinal direction, respectively, and a slider 19 is movably attached to the guide rails 18 . The slider 19 is connected to the tip of a cylinder rod 20a of a first cylinder 20 that horizontally reciprocates along the guide rail 18. As the first cylinder 20 expands and contracts, the slider 19 moves along the guide rail 18. reciprocating linear motion along These guide rails 18 , slider 19 and first cylinder 20 serve as drive means for reciprocating the first guide member 15 .

The first guide member 15 includes an elongated plate-like connection plate 22 extending downward, and a first guide portion 23 connected to the lower end of the connection plate 22 . The first guide portion 23 is made of a flat plate and attached so as to extend in a direction perpendicular to the longitudinal direction of the connecting plate 22 . As shown in FIG. 1(b) and the like, both ends in the longitudinal direction form slopes that slope downward toward the tip, forming an isosceles trapezoid when viewed from the front.

The mounting surface of the first guide portion 23 is the outer surface opposite to the opposing surfaces of the pair of connecting plates 22 constituting the pair of first guide members 15 . As a result, as shown in FIGS. 2A and 2C, the pair of first guide members 15 has the connecting plate 22 located inside and the first guide portion 23 located outside. The outer first guide portion 23 comes into contact with a predetermined portion of the blank sheet 1 and mainly assists the folding of the first flap 3 .

Also, the connecting plate 22 is connected to the slider 19 at its upper end. As a result, the first guide member 15 moves horizontally together with the slider 19 following the reciprocating motion of the slider 19 . Along with this reciprocating motion, the pair of first guide members 15 move toward and away from each other.

Further, during the operation of the box manufacturing apparatus, the first guide portion 23 of the first guide member 15 is positioned along the long side of the bottom surface 2, and the first outer wall 3a is bent more specifically than the first flap 3. contribute to

The second guide member 16 is attached to the base member 13 so as to be able to move up and down relative to the base member 13 . That is, the main body of the second cylinder 30 is attached to the central portion of the lower surface of the base member 13 in the longitudinal direction. A cylinder rod 30a of the second cylinder 30 reciprocates vertically. A support plate 28 arranged to extend in the horizontal direction is connected to the tip of the cylinder rod 30a, and second guide portions 29 are connected to both ends of the support plate 28, respectively. As shown in FIG. 2C, the first guide portion 23 enters between the pair of second guide portions 29 . The second guide portion 29 comes into contact with a predetermined portion of the blank sheet 1 and mainly assists the folding of the second flap.

As the base member 13 moves up and down, the second guide member 16 rises and lowers together. move up and down relative to each other.

As shown in FIGS. 2(b) and 2(c), the second guide portion 29 is made of a block body having a predetermined width, and the side surface 29b of the main body of the second guide portion 29 and the first guide portion 23 are substantially Located on the same line. Then, in a plan view shown in FIG. 2(c), the imaginary line connecting the side surface 29b and the front surface 29a of the first guide portion 23 and the second guide portion 29 substantially coincides with the peripheral edge of the bottom surface 2 of the blank sheet 1. I have to.

Other components will be described below while describing the operation of the upper mold device 11 described above. The blank sheet 1 in the unfolded state shown in FIG. 1(a) is folded at an appropriate position of the first flap 3 by the flap folding device during movement of the upstream conveying line leading to the box making device, and the first outer wall 3a is folded. and the folding line 5 between the first frame piece 3b, the folding line 5 between the first frame piece 3b and the first inner wall 3c, and the folding line 5 between the first inner wall 3c and the first locking piece 3d. As shown in FIG. 3(a), the first outer wall 3a extends flush with the bottom surface 2, and the first inner wall 3c is folded back onto the first outer wall 3a. As they overlap, the first locking piece 3d jumps upward.

When the base member 13 is at the uppermost position, the box-making apparatus is such that the lower end of the first guide portion 23 of the first guide member 15 is positioned at a predetermined distance from the upper surface of the lower die 12 as shown in FIG. 3(a). Stay in the upper position. At this standby position, the distance between the lower ends of the first guide member 15 and the first guide portion 23 and the upper surface of the lower die 12 is equal to or greater than the thickness of the blank sheet 1 .

At this stand-by position, the above-described predetermined form is introduced into the space between the first guide member 15 and the lower die 12 from a direction perpendicular to the plane of FIG. blank sheet 1 is supplied. The supplied blank sheet 1 is set so that the folding line 5 between the bottom surface 2 and the first outer wall 3a is positioned above the inner peripheral surface 12a of the lower die 12. As shown in FIG.

The first guide member 15 is on standby at a position closer to the center. After the blank sheet 1 is set, the first guide member 15 moves outward, and the lower end of the first guide portion 23 is located on the periphery of the bottom surface 2, that is, on the bottom surface 2 and borders the first outer wall 3a. It touches the nearest position along the fold line 5 provided in the part.

In addition, although the first locking piece 3d that has jumped up is set to stand substantially vertically, for example, even if it enters the upper region of the bottom surface 2 due to insufficient bending, in this embodiment, When the blank sheet 1 is set, the first guide member 15 is at a position closer to the center, and the first guide portion 27 is positioned closer to the center of the bottom surface 2 than the folding line 5 provided at the boundary with the first outer wall 3a. The first locking piece 3 d is positioned in a spring-up position on the outer surface side of the first guide portion 23 because it moves outward after being set.

Further, in this embodiment, the height of the first guide portion 23 is set lower than the height of the side wall of the box. As a result, when the first outer wall 3a is erected, the first guide portion 23 biases not the entire height direction of the first inner wall 3c but the vicinity of the tip (lower end) thereof. Therefore, the first inner wall 3c is inclined in a substantially inverted triangular shape, and the first frame piece 3b can be boxed without being crushed (see FIG. 3(b)).

Further, the lower end of the first guide portion 23 and the lower end of the main body of the second guide portion 29 are on the same plane when they move downward together as the base member 13 descends (see FIG. 2(b), etc.). . Therefore, when the lower end of the first guide portion 23 contacts the bottom surface 2 of the blank sheet 1 as described above, the lower end of the second guide portion 29 also contacts the bottom surface 2 of the blank sheet 1 (see FIG. 4A ), etc.). The first guide portion 23 contacts and holds down the long side of the bottom surface 2 of the blank sheet 1 , while the second guide portion 29 mainly contacts and holds down the short side of the bottom surface 2 . As a result, the first guide portion 23 and the second guide portion 29 restrain the four sides of the bottom surface 2 of the blank sheet 1 in the vicinity thereof.

After the first guide member 15 moves outward and the first guide portion 23 aligns with the folding line 5 as described above, the base member 13 moves downward from the state shown in FIG. (a) see the middle arrow). Then, the first guide portion 23 and the second guide portion 29 urge the bottom surface 2 of the blank sheet 1 downward. Along with this, the blank sheet 1 also moves downward and enters the lower die 12 . Then, as shown in FIG. 3( b ), the approach is such that the inner side (bottom surface 2 side) near the fold line 5 at the boundary between the first outer wall 3 a which is the long side of the bottom surface 2 and the bottom surface 2 is the first guide. Since the blank sheet 1 is held down by the portion 23 , the blank sheet 1 is neatly folded along the folding line 5 , and the first outer wall 3 a rises from the long side portion of the bottom surface 2 . Further, the first frame piece 3b and the first inner wall 3c also rise as the first outer wall 3a rises. At this time, the connection end side of the first inner wall 3c with the first frame piece 3b is located inside by the width of the first frame piece 3b, and the tip of the first inner wall 3c (not the first frame piece 3b) connection side) is biased by the first guide portion 23 to move toward the first outer wall 3a.

As shown in FIG. 3(a), in this embodiment, the upper end portion of the inner peripheral surface 12a of the lower die 12 is provided with a guide portion 12b consisting of an inclined surface with cut corners. As a result, the bottom surface 2 of the blank sheet 1 moving downward is smoothly guided into the space defined by the lower die 12, and along with this, the first outer wall 3a is also aligned with the folding line 5 along the periphery of the bottom surface 2. A part is folded and erected.

Preferably, the lower mold 12 is not arranged along the entire circumference of the bottom surface 2, but is discretely scattered at a plurality of locations along each side of the bottom surface 2. As shown in FIG. In addition, in the illustrated example, the shape is a block-like shape with the corners cut off, but for example, it may be formed of a plate member extending in the vertical direction, and the upper end thereof may be bent outward. .

After that, the first cylinder 20 is driven (forward movement) to extend the cylinder rod 20a, and the direction in which the slider 19 and the first guide member 15 approach each other (arrow direction in FIG. 3(b)), that is, the center of the bottom surface 2 move to the side. Along with this, the tip side of the first inner wall 3c moves toward the central side of the bottom surface 2 due to the elastic restoring force of the portions of the folding lines 5 on both sides of the first frame piece 3b, and the first outer wall 3a and the second outer wall 3a move toward the center of the bottom surface 2. A predetermined space corresponding to the width of the first frame piece 3b is secured between the inner walls 3c, and the first frame piece 3b is positioned on the upper end side of both side walls (see FIG. 3(c)).

As shown in FIG. 3(c), the first guide portion 23 is separated from the fold line 5 at the boundary between the first guide portion 23 around the bottom surface 2 and the bottom surface 2, and the space above the first guide portion 23 has a second The one inner wall 3c and the first frame piece 3b are absent. Therefore, when the base member 13 moves upward in that state (in the direction of the arrow in FIG. 3(c)), the first guide portion 23 and the first guide member 15 interfere with the first inner wall 3c and the first frame piece 3b. It moves up and moves out of the box 10 (see FIG. 3(d)). In addition, as the first guide portion 23 moves upward, the first guide portion 23 separates from the first locking piece 3d and there is nothing to hold the first locking piece 3d. The elastic restoring force of the folding line 5 at the boundary with the one inner wall 3c also acts, and the first locking piece 3d falls down and takes a posture of contacting or approaching the bottom surface 2. As shown in FIG. Thereby, the folding process of the first flap 3 is completed.

As described above, in the present embodiment, the first guide member 15, which restrains the peripheral edges of the two opposing sides of the bottom surface 2 of the blank sheet 1, has a function of moving up and down and a function of moving in a predetermined horizontal direction. The first guide part 23 can be brought into contact with the immediate vicinity of the folding line 5, and the blank sheet 1 can be folded at the folding line 5 to stand up the first outer wall 3a, and the raised first outer side Without interfering with the first inner wall 3c located inside the wall 3a by the width of the first frame piece 3b, the mold can be removed by moving outside the box 10.例文帳に追加

Moreover, the bending process of the second flap 4 is performed as follows. That is, as described above, when the first guide portion 23 contacts the bottom surface 2 of the blank sheet 1 , the lower end of the second guide portion 29 also contacts the bottom surface 2 . At the time of this contact, the front surface 29a of the second guide portion 29 is positioned on the bottom surface 2 of the blank sheet 1 and in the immediate vicinity along the folding line 5 provided at the boundary with the second outer wall 4a. Contact. The second flap 4 differs from the first flap 3 in that the second inner wall 4c is not folded in advance. The two frame pieces 4b and the second inner wall 4c are configured to extend on the same plane as the bottom surface 2 (not shown).

In this state, when the base member 13 moves downward, the second guide portion 29 moves downward together with the first guide portion 23 , and the bottom surface 2 enters the lower mold 12 . As a result, as shown in FIG. 4( a ), the inner side (bottom surface 2 side) of the boundary between the second outer wall 4 a that is the short side of the bottom surface 2 and the fold line 5 near the bottom surface 2 is the second guide portion 29 . , the blank sheet 1 is neatly folded along the folding line 5, and the second outer wall 4a rises from the short side portion of the bottom surface 2. - 特許庁A second frame piece 4b, a second inner wall 4c and a second locking piece 4d are positioned on the same plane as the erected second outer wall 4a.

Then, the second cylinder 30 double-acts to raise the lower end of the cylinder rod 30a, and the second guide member 16 also rises accordingly, leaves the bottom surface 2, and retreats above the box 10. As shown in FIG. On the other hand, as shown in FIG. 4(b), on the outside located on the side of the second flap 4, it is attached to the tip of the cylinder rod 31a of the third cylinder 31 and directed toward the upright second flap 4. It has a pusher member 32 that moves forward and backward, and a folding member 34 that rotates forward and backward within a predetermined angular range integrally with a rotating shaft 33 extending in a direction parallel to the short side of the bottom surface 2 . The pusher member 32 has a first restraining portion 35 connected to the cylinder rod 31a and extending in the vertical direction, and a second restraining portion 36 projecting forward from the upper end of the first restraining portion 35 . The lower surface 36a of the second holding portion 36 is set to a height facing the folding line 5 at the boundary between the second outer wall 4a of the second flap 4 and the second frame piece 4b.

Furthermore, below the pusher member 32 and the third cylinder 31 , a support member 42 is provided that moves forward and backward toward the second flap 4 by means of the fourth cylinder 41 . The support member 42 is set to a height corresponding to the position of the bottom surface of the blank sheet 1, and the support member 42 reciprocates horizontally within that height.

As described above, along with the downward movement of the second guide portion 29, the second outer wall 4a and the like are bent from the fold line 5 of the peripheral edge of the bottom surface 2 to assume an upright position as shown in FIG. 4(a). Become. In this state, the second guide member 16 moves upward as indicated by the arrow in FIG. 4(a) and retreats upward from the lower die 12, and the first guide member 15 and the first guide portion 23 move further downward. do. As a result, the blank sheet 1 moves downward and is positioned in the area where the pusher member 32 and the support member 42 are arranged (see FIG. 4(b), etc.).

In FIG. 4B, the pusher member 32 and the support member 42 move forward toward the second flap 4 and are in the operating position. There is a condition where only member 42 is in the operating position. In this state, when the blank sheet 1 moves downward, the bottom surface 2 of the blank sheet 1 contacts and is supported by the upper surface of the L-shaped support member 42 as shown. At this time, the blank sheet 1 can be stably supported by configuring the bottom surface 2 of the blank sheet and the upright second outer wall 4a to contact the upper surface and the front surface of the L-shaped support member 42 . In this state, the second flap 4 is in a vertically upright position as in FIG. 4(a).

Next, the third cylinder 31 moves forward and the pusher member 32 moves forward toward the second flap 4 while the second flap 4 stands by in a vertical standing position. Then, the front surface 36b of the second restraining portion 36 of the pusher member 32 contacts the second frame piece 4b of the second flap 4, and the pusher member 32 moves forward as it is, so that the second frame piece 4b of the box 10 is pushed. bias inward. By this biasing force, the second outer wall 4a and the second frame piece 4b are bent at the folding line 5, and as shown in FIG. 4(b), the second frame piece 4b and the second inner wall 4c It is displaced to a posture extending horizontally toward the inside of the box 10 . In this state, the lower surface 36a of the second restraining portion 36 contacts the upper surface/surface of the bent second frame piece 4b, and the elastic restoring force of the folding line 5 or the like causes the second frame piece 4b to rise upward. deter

In addition, in this embodiment, a predetermined number of pusher members 32 (for example, three each) are arranged on both sides of the second flap 4 in the longitudinal direction, and a predetermined space is secured without providing them in the central portion in the longitudinal direction. do. Then, the bending member 34 is arranged at this central portion. In this way, by arranging a plurality of pusher members 32 on both the left and right sides in the longitudinal direction of the second flap 4, the second flap 4 can be positioned at the folding line 5 between the second outer wall 4a and the second frame piece 4b. , and the second frame piece 4b and the second inner wall 4c can be folded down in the horizontal direction.

On the other hand, the bending member 34 includes a connecting bar 38 having one end connected to the rotating shaft 33 and a contact member 39 connected to the other end of the connecting bar 38 . When the rotating shaft 33 rotates forward and backward, the connecting bar 38 also rotates around the rotating shaft 33, and the contact member 39 reciprocates along a predetermined arc. 4(b), the connecting bar 38 and the contact member 39 are positioned outside the upper space of the box 10 (bottom surface 2), and the contact member 39 enters the box 10 and reciprocates between the operating positions near the bottom surface 2 while urging the second inner wall 4c.

The connecting bar 38 has a first arm portion 38a on the rotating shaft 33 side and a second arm portion 38b on the contact member 39 side. is set to be The obtuse angle is set so that the second arm portion 38b stands up in the vertical direction orthogonal to the bottom surface 2 when reaching the operating position, as shown in FIG. 4(c).

When the bending member 34 rotates from the waiting position shown in FIG. 4(b) with the rotation of the rotary shaft 33 indicated by the arrow in FIG. It contacts the surface on the side of the second inner wall 4c along the immediate vicinity of the folding line 5 at the boundary between the second inner wall 4c and the second locking piece 4d. When the bending member 34 is further rotated in this state, the contact member 39 urges the distal end side (the side of the second locking piece 4d) of the second inner wall 4c downward. At this time, since the second frame piece 4b side is held down by the lower surface 36a of the second holding portion 36, the biasing force is received, and the fold line between the second frame piece 4b and the second inner wall 4c is bent. The portion 5 is bent, and the second inner wall 4c is folded downward while the second frame piece 4b is maintained in the horizontal direction.

Then, as shown in FIG. 4(c), when the bending member 34 reaches the operating position, the second inner wall 4c is vertically positioned inside the second outer wall 4a with a space equal to the width of the second frame piece 4b. The second locking piece 4d connected to the second inner wall 4c is in contact with the bottom surface 2 and forms the folding line 5 between the second inner wall 4c and the second locking piece 4d. is folded in the valley and is in contact with the bottom surface 2 . Then, when the bending member 34 reaches the operating position, the first guide portion 23 rises and retreats upward, and then the bending member 34 returns to the standby position. By doing so, the second locking piece 4d is positioned below the first locking piece 3d. Thereby, the folding process of the second flap 4 is completed.

In this process of folding the second flap 4, the portion of the fold line 5 between the second outer wall 4a and the second frame piece 4b can be neatly folded at that position by the action of the pusher member 32, and the second The folding line 5 between the frame piece 4b and the second inner wall 4c can be neatly folded at that position by the pusher member 32 and the folding member 34, and the folding line 5 between the second inner wall 4c and the second locking piece 4d can be folded. The wire 5 can be neatly folded at that position by the folding member 34 and the bottom surface 2. - 特許庁Particularly in this embodiment, when the bending member 34 contacts the second inner wall 4c and urges it in a predetermined direction, the bottom surface 2 and the second outer wall 4a are supported by the support member 42 and are prevented from moving downward and horizontally. Therefore, it can be folded at the predetermined folding line 5 more reliably.

Thereafter, after the first guide portion 23 is lifted, the rotating shaft 33 rotates in the reverse direction, and the bending member 34 returns to the standby position to prepare for the next bending. Next, the pusher member 32 also returns to the standby position, and the support member 42 retreats from the arrangement area. In addition, the first flap 3 and the second flap 4 are bent, and the upper end of the side wall forms a frame with a predetermined width by the first frame piece 3b and the second frame piece 4b, thereby forming a double wall structure of the outer wall and the inner wall. The provided box 10 passes through the lower die 12, is dropped onto the conveying device below, and is carried out by the conveying device.

Although the specific description is omitted, when the first flap 3 (first outer wall 3a) and the second flap 4 are raised by the lower die 12, the first folded piece 6 and the second folded piece The strip 7 is folded at the adjacent folding lines 5, and the folded tab 8 is positioned inside the raised second flap 4 (see FIG. 1(b)).

In the above-described embodiment, the second guide member 16 is raised after the first outer wall 3a is erected and while the base member 13 is being lowered. By doing so, the operation of the bending member 34 can be started earlier, and the cycle time can be shortened. However, the second guide member 16 may be raised after the base member 13 reaches the lower limit position. In this case, the pusher member 32 is operated after the second guide member 16 is lifted.

Although various aspects of the present invention have been described above using embodiments, these embodiments and descriptions are not intended to limit the scope of the present invention, but rather to aid understanding of the present invention. Note that it is provided. The scope of the invention is not limited to the constructions or methods of manufacture explicitly described herein, but rather includes within its scope combinations of the various aspects of the invention disclosed herein. While the claimed features of the invention are identified in the appended claims, any configuration not presently specified in the claims is disclosed herein. For the sake of clarity, it is possible that such a configuration may be claimed in the future.

1: Blank sheet 2: Bottom surface 3: First flap 3a: First outer wall 3b: First frame piece 3c: First inner wall 3d: First locking piece 4: Second flap 4a: Second outer wall 4b: Second frame piece 4c : Second inner wall 4d : Second locking piece 5 : Folding line 10 : Box 11 : Upper mold device 12 : Lower mold 13 : Base member 15 : First guide member 16 : Second guide member 23 : first guide portion 29 : second guide portion 32 : pusher member 34 : bending member 39 : contact member

Claims (8)

A predetermined position of a blank sheet in an unfolded state, which is continuously provided with first flaps constituting side walls on a pair of opposite sides of a rectangular bottom surface and continuously provided with second flaps constituting side walls on another pair of opposite sides. A box making device for folding to form a box,
The first flap has a first outer wall, a first frame piece, and a first inner wall continuously from the opposite side of the bottom surface,
A boundary portion between the first outer wall and the first frame piece and a boundary portion between the first frame piece and the first inner wall are bent, and the first inner wall is folded back to form an upper portion of the first outer wall. so that it is supplied to the box making device in a posture overlapping with
a first guide member that contacts the bottom surface of the supplied blank sheet from above;
a lower mold that contacts the lower surface of the first outer wall,
The first guide member has a function of moving up and down and a function of moving in a predetermined horizontal direction, and the predetermined horizontal direction moves toward and away from the side connected to the first flap of the bottom surface. is the direction,
With the lower end of the first guide member in contact with the bottom surface at a position along the side connected to the first flap of the bottom surface, the blank sheet is moved downward, thereby The first guide member is configured to move upward while the first outer wall is erected by bending and the first guide member is moved in a direction away from the side,
A box manufacturing apparatus, wherein the first guide member includes a connecting plate extending downward, and a first guide portion connected to a surface of the connecting plate on the lower end side and on the side of the first flap. The first flap has a first locking piece continuous with the first frame piece and the non-connected side,
The first locking piece is supplied to the box-making device in a posture in which the tip is flipped up,
The first guide member has a function of moving in the horizontal direction from a position away from the side of the bottom surface to approach the side to move the lower ends of the first locking pieces and the first inner wall to the side. 2. The box-making apparatus according to claim 1, wherein the box-making apparatus is positioned on the side. The second flap has a second outer wall, a second frame piece, and a second inner wall continuously from the opposite side of the bottom surface,
The second outer wall, the second frame piece and the second inner wall are supplied to the box making device in an extended posture,
a second guide member that contacts the bottom surface of the supplied blank sheet from above;
a lower mold that contacts the lower surface of the second outer wall,
With the lower end of the second guide member in contact with the bottom surface at a position along the side connected to the second flap of the bottom surface, the blank sheet is moved downward, thereby Bend to erect the second outer wall, the second frame piece, and the second inner wall,
a pusher member that biases the second frame piece in the standing posture to bend the boundary portion between the second outer wall and the second frame piece;
a bending member that biases downward the second inner wall extending together with the second frame piece bent by the pusher member to bend the boundary portion between the second frame piece and the second inner wall; The box-making apparatus according to claim 1 or 2, characterized by: A predetermined position of a blank sheet in an unfolded state, which is continuously provided with first flaps constituting side walls on a pair of opposite sides of a rectangular bottom surface and continuously provided with second flaps constituting side walls on another pair of opposite sides. A box making device for folding to form a box,
The first flap has a first outer wall, a first frame piece, and a first inner wall continuously from the opposite side of the bottom surface,
A boundary portion between the first outer wall and the first frame piece and a boundary portion between the first frame piece and the first inner wall are bent, and the first inner wall is folded back to form an upper portion of the first outer wall. so that it is supplied to the box making device in a posture overlapping with
a first guide member that contacts the bottom surface of the supplied blank sheet from above;
a lower mold that contacts the lower surface of the first outer wall,
The first guide member has a function of moving up and down and a function of moving in a predetermined horizontal direction, and the predetermined horizontal direction moves toward and away from the side connected to the first flap of the bottom surface. is the direction,
With the lower end of the first guide member in contact with the bottom surface at a position along the side connected to the first flap of the bottom surface, the blank sheet is moved downward, thereby The first guide member is configured to move upward while the first outer wall is erected by bending and the first guide member is moved in a direction away from the side,
The first flap has a first locking piece continuous with the first frame piece and the non-connected side,
The first locking piece is supplied to the box-making device in a posture in which the tip is flipped up,
The first guide member has a function of moving in the horizontal direction from a position away from the side of the bottom surface to approach the side to move the lower ends of the first locking pieces and the first inner wall to the side. A box making device characterized in that it is positioned on the side. The second flap has a second outer wall, a second frame piece, and a second inner wall continuously from the opposite side of the bottom surface,
The second outer wall, the second frame piece and the second inner wall are supplied to the box making device in an extended posture,
a second guide member that contacts the bottom surface of the supplied blank sheet from above;
a lower mold that contacts the lower surface of the second outer wall,
With the lower end of the second guide member in contact with the bottom surface at a position along the side connected to the second flap of the bottom surface, the blank sheet is moved downward, thereby Bend to erect the second outer wall, the second frame piece, and the second inner wall,
a pusher member that biases the second frame piece in the standing posture to bend the boundary portion between the second outer wall and the second frame piece;
a bending member that biases downward the second inner wall extending together with the second frame piece bent by the pusher member to bend the boundary portion between the second frame piece and the second inner wall; The box-making apparatus according to claim 4, characterized by: A predetermined position of a blank sheet in an unfolded state, which is continuously provided with first flaps constituting side walls on a pair of opposite sides of a rectangular bottom surface and continuously provided with second flaps constituting side walls on another pair of opposite sides. A box making device for folding to form a box,
The first flap has a first outer wall, a first frame piece, and a first inner wall continuously from the opposite side of the bottom surface,
A boundary portion between the first outer wall and the first frame piece and a boundary portion between the first frame piece and the first inner wall are bent, and the first inner wall is folded back to form an upper portion of the first outer wall. so that it is supplied to the box making device in a posture overlapping with
a first guide member that contacts the bottom surface of the supplied blank sheet from above;
a lower mold that contacts the lower surface of the first outer wall,
The first guide member has a function of moving up and down and a function of moving in a predetermined horizontal direction, and the predetermined horizontal direction moves toward and away from the side connected to the first flap of the bottom surface. is the direction,
With the lower end of the first guide member in contact with the bottom surface at a position along the side connected to the first flap of the bottom surface, the blank sheet is moved downward, thereby The first guide member is configured to move upward while the first outer wall is erected by bending and the first guide member is moved in a direction away from the side,
The second flap has a second outer wall, a second frame piece, and a second inner wall continuously from the opposite side of the bottom surface,
The second outer wall, the second frame piece and the second inner wall are supplied to the box making device in an extended posture,
a second guide member that contacts the bottom surface of the supplied blank sheet from above;
a lower mold that contacts the lower surface of the second outer wall,
With the lower end of the second guide member in contact with the bottom surface at a position along the side connected to the second flap of the bottom surface, the blank sheet is moved downward, thereby Bend to erect the second outer wall, the second frame piece, and the second inner wall,
a pusher member that biases the second frame piece in the standing posture to bend the boundary portion between the second outer wall and the second frame piece;
a bending member that biases downward the second inner wall extending together with the second frame piece bent by the pusher member to bend the boundary portion between the second frame piece and the second inner wall; A box-making device characterized by The pusher members are arranged on both longitudinal sides of the second flap,
7. The box manufacturing apparatus according to claim 3, wherein the folding member is arranged in the longitudinal center of the second flap. The pusher member has a first restraining portion extending in the vertical direction and a second restraining portion projecting forward from the upper end of the first restraining portion,
The lower surface of the second restraining portion is set to a height facing a boundary portion between the second outer wall in an upright position and the second frame piece, and the pusher member advances toward the second frame piece. When moved, the second restraining portion contacts and biases the second frame piece, and is bent at the boundary portion between the second outer wall and the second frame piece to bend the second frame piece and the second inner wall. 3, 5, 6, and 7, wherein the lower surface of the second restraining portion is configured to contact the upper surface of the second frame piece in the collapsed state. The box-making device according to item 1.

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