JP2000108224A - Case manufacturing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a case after folding from being lifted together with a rising press plate. SOLUTION: The case manufacturing apparatus comprises a folding mechanism 32 for folding folding pieces 3a, 5a of both ends of an outside wall 3 of a blank A and an inside wall 5 folded on the wall 3, a side folding guide 35 for erecting a pair of outside walls upward, and an end wall folding guide 36 for folding the outer end wall of the blank A upward. In this case, a sidewall pressing mechanism 80 is provided at an upper side of a pressing plate 23. After the pieces 3a, 5a are folded upward by the mechanism 32, the blank A is pressed down by descending the plate 23, the wall 3 and the outer end wall are erected upward by bringing into contact with the guide 35 and the guide 36, a tray is assembled, the plate 23 is raised in the state that the wall 5 folded together with the wall 3 is pressed outward by the mechanism 80 to prevent the tray from moving upward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box making apparatus for assembling a framed tray.

[0002]

2. Description of the Related Art A blank shown in FIG. 10 is conventionally known as a blank for a framed tray. In the blank A, an outer wall 3 is continuously provided on both sides of a bottom 1 via a fold line 2, and an inner wall 5 is continuously provided outside the outer wall 3 via two fold lines 4. Folded pieces 3a, 5a are provided at both ends of the pieces 3, 5 with a fold line 6 interposed therebetween.

Further, an outer end wall 8 is continuously provided at both ends of the bottom 1 via a fold line 7, and an inner end wall 10 is continuously provided outside the outer end wall 8 via two fold lines 9. ing.

In the box making apparatus for mechanically assembling the blank A as described above, usually, the outer wall 3 is erected by bending from the fold line 2 and then the inner wall 5 is bent inward to form the outer wall 3. After the folded pieces 3a, 5a of the side walls 3, 5 overlapping each other are bent inward on the inner surface, the outer end wall 8 is formed.
Then, the inner end wall 10 is bent inward to a position overlapping the inner surface of the outer end wall 8.

Incidentally, in assembling a tray for bending the outer wall 3 before the inner wall 5, the height H of the outer wall 3 is required.
When the width of the inner wall 5 is equal to or more than の of the width dimension W of the bottom 1, the inner wall 5 cannot interfere with each other and bend when the inner wall 5 is bent.

In order to solve such a problem, in a first step, the inner side wall 5 is bent onto the outer side wall 3, and in a second step, the folded pieces 3a, 5a overlapping each other are bent upward. The outer side wall 3 and the inner side wall 5 are bent upward to stand up, the outer end wall 8 is raised upright, and then the inner end wall 10 is bent inward to assemble a framed tray. It is becoming.

[0007]

In the second step, the outer wall 3 and the outer end wall 8 are bent by pressing the bottom 1 of the blank A having the bent inner wall 5 with a pressing plate. Is pressed down, and the outer wall 3 and the outer end wall 8 are erected upward by contact with the pair of side wall bending guides and the pair of end wall bending guides provided on the descending path. 3 and after bending of the outer end wall 8,
When the push plate is raised, the inner wall 5 overlapping the inner surface of the outer wall 3 opens inward to engage with the push plate, and the assembled tray is pulled up together with the push plate to securely discharge the tray to a predetermined position. In some cases, it was not possible.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a box making apparatus capable of reliably preventing a framed tray with an outer wall and an outer end wall bent and assembled from rising together with a push plate. It is.

[0009]

In order to solve the above-mentioned problems, according to the present invention, there is provided a pair of outer walls provided on both sides of a bottom and having a pair of inner walls bent on both sides to support both sides of the blank. A pair of pressing members provided on each rail to prevent the inner wall of the blank from floating,
A vertically movable push plate that presses the bottom of the blank to push down the blank, and a bending unit that presses a bent piece connected to both ends of the outer wall and the inner wall of the blank from below to bend upward. A pair of side wall bending guides fixedly arranged to raise the outer wall upward when the blank is lowered by pushing down the push plate, and an outer end wall connected to both ends of the bottom when the blank is lowered is raised upward. An end wall bending guide having a fixed arrangement to be fixed, and an inner end wall bending means for bending the inner end wall connected to the outer end wall to a position overlapping the inner surface of the outer end wall after the outer end wall is raised. A side wall pressing means which moves up and down together with the pressing plate and presses the inner wall raised together with the outer wall by the contact with the side wall bending guide in a direction overlapping with the outer wall. It was adopted.

With the above construction, when the outer wall and the outer end wall are erected by contact with the respective bending guides by pushing down the blank by lowering the push plate, the side wall pressing means presses the inner wall outward. In order to prevent the tray from being opened inward, there is no inconvenience that the inner side wall is engaged with the push plate when the push plate is raised, and the tray after assembling with the push plate is reliably prevented from being pulled up. be able to.

Here, as side wall pressing means, roller arms are swingably provided on both sides of the push plate, and rotatable rollers are attached to lower ends of the respective roller arms, and each roller arm is outwardly moved by a spring. A configuration comprising a biased configuration may be employed.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 3, the blank A shown in FIG. 10 is conveyed along a pair of left and right rails 20 with the inner wall 5 folded on the outer wall 3. Here, the transport means for transporting the blank A along the rails 20 is omitted in the drawing, but an endless chain is provided between the pair of rails 20, and a pushing claw is fixed to the chain, and when the chain is moved, the pushing is performed. Blank A with nail
At the bending station 21 by pressing the rear end thereof.

On both sides of the upper part of the bending station 21,
A pressing member 22 composed of a pair of plate members for preventing the inner wall 5 from floating is provided. Between the pressing members 22, a pressing plate 23 for pressing down the blank A stopped at the bending station 21 is provided.

The pressing plate 23 has substantially the same size as the bottom 1 of the blank A, and an upper portion of a rod 24 provided on the upper surface thereof is connected to a lift 25.

The elevating table 25 can be moved up and down along a vertically long rail 27 attached to a column 26 and is moved up and down by the operation of an elevating device 28.

The lifting device 28 has a crank arm 30 attached to an end of a rotating shaft 29 rotatably supported by the support 26, and a tip end of the crank arm 30 and the lifting table 25.
Are connected by a rod 31, and the lift 25 is moved up and down by the rotation of the rotary shaft 29.

The push plate 23 is moved up and down together with the elevating table 25, and when it is lowered, the push plate 23 pushes down the bottom 1 of the blank A stopped at the bending station 21.

Below the folded pieces 3a, 5a of the blank 1 stopped at the folding station 21, a folding mechanism 32 for pressing the folded pieces 3a, 5a from below to bend upward is provided. Have been.

The bending mechanism 32 includes a lifting cylinder 33,
And a push-up guide 34 which is moved up and down by the lift cylinder 33. The push-up guide 34 is set at a position where it is thrown below the upper surface of the rail 20 as a descent stop position. 3a and 5a are pushed up.

Below the blank A which stops at the folding station 21, a plurality of side wall bending guides 35 are provided at a position facing the outer side wall 3 and a plurality of end wall bending guides are provided at a position facing the outer end wall 8. A guide 36 is provided.

The side wall bending guide 35 and the end wall bending guide 36 are fixedly arranged, and the pair of outer walls 3 of the blank A pushed down by the push plate 23 are turned upward by abutting on the side wall bending guide 35. It is erected 90 °. On the other hand, the pair of outer end walls 8 of the blank A are turned upward by contact with a pair of end wall bending guides 36.
Wake up 0 °.

Here, in order that the outer wall 3 and the outer end wall 8 can be smoothly bent along the fold lines 2 and 7, the side wall bending guide 35 and the end wall bending guide 36 are provided.
Are provided with inclined guide surfaces 35a and 36a at the upper portion of the inner surface of the.

As shown in FIG. 5, the side wall bending guide 35
A movement preventing plate 3 for preventing the upward movement of the blank A in which the outer wall 3 and the outer end wall 8 are bent upward is provided at the lower part of the plate.
7 are provided.

The movement preventing plate 37 is pivotally supported at its inner upper portion by a pin 39 provided on a supporting plate 38, and has a guide pin 41 provided on the supporting plate 38 in a guide hole 40 formed on the outer upper portion. The movement preventing plate 37 is swingable in a range in which the guide pin 41 is inserted and the inner periphery of the guide hole 40 contacts the guide pin 41. The movement prevention plate 37
The upper edge of the inner circumference of the guide hole 40 is a guide pin 4
1, and in this contact state, a locking claw 37 a provided on the inner portion protrudes inward from the inner surface of the side wall bending guide 35 and faces the upper edge of the outer wall 3 raised above the blank A. Then, the blank A is prevented from moving upward.

As shown in FIGS. 3 to 5, between the left and right end wall bending guides 36, the inner end wall on the outer end wall 8 raised upward by the contact with the end wall bending guides 36. 10
And a supporting device 70 for receiving the bottom 1 of the blank A before the bending of the inner end wall 10 is started. I have.

The inner end wall bending device 50 is provided with a pair of opposing support plates 51 between the left and right end wall bending guides 36, and a first pin 52 provided at an upper portion inside the support plate 51 is provided as a center.
The arm 53 is swingably supported, a second arm 54 is flexibly connected to the distal end of the first arm 53, and the arms 53, 54 are linearly connected by a spring 55 stretched between the arms 53, 54. The bent plate 56 is attached to the second arm 54 while being held in the expanded state.

Further, a swing arm 58 is mounted on a rotating shaft 57 penetrated and supported by the support plate 51, and a distal end of the swing arm 58 and a distal end of the second arm 54 are connected by a link 59. Drive shaft 6 orthogonally arranged
The rotation of the first arm 53 is transmitted to the rotation shaft 57 by a pair of bevel gears 61 meshing with each other to swing the first arm 53 about the pin 52 and the second rotation about the connection position with respect to the first arm 53. By the swing of the arm 54, the bent plate 56
Is rotated 180 degrees or more inward from the state shown in FIG.

The support device 70 supports an L-shaped arm 72 so as to be swingable around a pin 71 provided on the upper inside of the support plate 51, and a receiving claw 73 is provided at the lower end of the L-shaped arm 72. In the direction in which the receiving claws 73 receive the bottom 1 of the blank A,
The arm 72 is urged by a spring 74.

Further, a locking lever 75 is attached to the rotating shaft 57, and the receiving claw 73 is brought into contact with the bottom 1 of the blank A by engagement of the locking lever 75 and a pin 76 provided on the L-shaped arm 72.
When the rotary shaft 57 rotates in the direction of the arrow in FIG. 3, the L-shaped arm 72 is swung inward by the elastic force of the spring 74 so that the receiving claw 73 is at the bottom 1.
On the downhill.

On the upper side of the push plate 23, a side wall pressing mechanism 80 for pressing the inner side wall 5 raised together with the outer side wall 3 by the contact with the side wall bending guide 35 toward the outer side wall 3 is provided.

The side wall pressing mechanism 80 is provided with a pair of front and rear support plates 81 on both sides of the upper surface of the push plate 23, and the pair of support plates 8
1, a pair of roller arms 83 are fixed to a rotating shaft 82 whose both ends are rotatably supported.
A roller 85 is rotatably attached to both ends of a roller shaft 84 whose both ends are supported at the distal end of the roller shaft 3.

Further, one end of a lever 86 is fixed to the rotating shaft 82, and the lever 86 is urged by a spring 88 in a direction in which the other end of the lever 86 comes into contact with a stopper 87 provided on the push plate 23. ing.

Here, the roller 85 is disposed outside the inner surface of the outer wall 3 which is raised by 90 ° by the side wall bending guide 35 in a state where the other end of the lever 86 is in contact with the stopper 87.

Now, when the blank A, which has been bent to a position where the inner side wall 5 overlaps the outer side wall 3, is transferred along the rail 20 and stopped at the bending station 21, as shown in FIG. The inner side walls 5 are opposed to each other, and the holding members 22 prevent the inner side walls 5 from floating.

Bending mechanism 3 simultaneously with the stop of blank A
The raising / lowering cylinder 33 in 2 operates to raise the push-up guide 34. The bent pieces 3a, 5a overlapping each other are pushed up by the raising of the push-up guide 34, and are raised upward as shown in FIG. 6 (I).

After the bent pieces 3a and 5a are raised, the push plate 23 descends, and the push plate 23 pushes the bottom 1 to push down the blank A.

When the blank A is lowered, the outer wall 3 is raised by the contact with the side wall bending guide 35 as shown in FIG.
The outer end wall 8 is raised by the abutment against 6.

When the outer wall 3 is raised, as shown in FIG.
To move inward. The rotation causes the rotation shaft 82 to rotate, and the lever 86 swings in a direction away from the stopper 87 to extend the spring 88, and the elastic force of the spring 88 causes the roller 85 to press the inner wall 5 toward the outer wall 3. .

FIG. 7 shows a state in which the push plate 23 is lowered to the lowest position, and the outer wall 3 and the outer end wall 8 of the blank A are shown.
Is bent 90 °, as shown in FIG. 9 (III), the tray B ₁ of the inner end wall 10 is erected is formed. Also, while the push plate 23 is moving down to the lowermost position, the movement preventing plate 37 shown in FIG. 7 is pushed outward by the outer wall 3 and moves outward when the push plate 23 reaches the lowermost position. The prevention plate 37 swings inward due to its own weight, and the locking claw 37 a faces the upper edge of the outer wall 3.

[0041] After assembly of the tray B _1, press plate 23 is raised. At this time, since the inner wall 5 is prevented from being opened inward by the pressing of the roller 85, the pressing plate 23
Rise without interfering with the inner wall 5. Therefore, generation of inconvenience tray B ₁ with the pushing plate 23 is raised is none, the pushing plate 23 is returned to the standby position escape smoothly from the inside tray B _1.

The ascent of the push plate 23, the exit from the roller 85 Tray B within ₁ moves outwardly by the elastic force of the spring 88, abuts against the inner surface of the side wall folding guide 35, the bending the side wall thereof folded guide When it passes through the upper end of 35, it swings further outward, and stops when the lever 86 contacts the stopper 87.

Note that the push-up guide 34 is
Until the cylinder returns to the ascent stop position.
Is returned to the lowering stop position by the operation of.

When the push plate 23 rises to the upper limit position and stops, as shown in FIG. 8 (I), the rotation shaft 57 rotates in the direction of the arrow in FIG. By swinging, the receiving claws 73 face the lower surface of the bottom 1. Further, the bent plate 56 swings inward, and the inner plate 10 is bent by the bent plate 56 to a position overlapping the inner surface of the outer end wall 8.

[0045] FIG. 8 (II) shows a state of being completely folded by the inner end wall 10, the frame with the tray B ₀ shown in FIG. 9 (IV) by bending of the inner end wall 10 is formed.

After forming the framed tray B ₀ , the rotating shaft 57
8 (I), the L-shaped lever 72 swings outward by the engagement of the locking lever 75 and the pin 76, and the bent plate 56 By swinging upward, the blank A is returned to the standby position where the bending of the next blank A is not prevented.

[0047] by the swinging of the outer direction of the L-shaped lever 72,受爪73 to retract from the lower side of the bottom 1, tray B ₀ after assembly is dropped on the belt conveyor 90 shown in FIG. 1, the It is discharged by the belt conveyor 90.

[0048]

As described above, in the present invention, the inner wall raised together with the outer wall is pressed in the direction overlapping with the outer wall by the side wall pressing means which moves up and down together with the push plate.
Since the inner wall is prevented from opening inward, the assembled tray can be prevented from being pulled up together with the push plate, and the assembled tray can be reliably discharged to a predetermined discharge position.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II of FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG. 2;

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2;

FIG. 5 is a sectional view taken along the line VV in FIG. 3;

FIG. 6 (I) is a front view showing a bent state of a bent piece of a blank, and (II) is a front view showing a bent state of an outer wall.

FIG. 7 is a front view showing a completely bent state of the outer end wall of the blank.

FIG. 8 (I) is a cross-sectional view showing a state where the inner end wall of the blank starts to be bent, and FIG. 8 (II) is a cross-sectional view showing a completely bent state of the inner end wall.

9 (I) to 9 (IV) are perspective views showing stepwise the bent state of the blank.

FIG. 10 is a perspective view showing a blank.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 20 Rail 22 Holding member 23 Push plate 32 Bending mechanism 33 Lifting cylinder 34 Push-up guide 35 Side wall bending guide 36 End wall bending guide 50 Inner end wall bending device 80 Side wall pressing mechanism 83 Roller arm 85 Roller 88 Spring

Claims (2)

[Claims] 1. A pair of rails supporting both sides of a blank having inner walls bent on a pair of outer walls provided on both sides of a bottom, and a pair of rails provided on each rail to lift the inner wall of the blank. A pair of holding members to prevent, a vertically movable push plate that presses down on the blank by pressing the bottom of the blank, and presses a bent piece connected to both ends of the outer wall and the inner wall of the blank from below. Folding means for bending upward, and when the blank is lowered by pushing down the push plate,
A pair of fixedly arranged side wall bending guides for raising the outer side wall upward, a fixedly arranged end wall bending guide for raising the outer end walls connected to both ends of the bottom when the blank is lowered, and After erecting the outer end wall, the outer end wall has inner end wall bending means for bending the inner end wall connected to the outer end wall to a position overlapping with the inner surface of the outer end wall. A box making device comprising a side wall pressing means which moves up and down together with a push plate and presses an inner wall raised together with an outer wall by contact with a side wall bending guide in a direction overlapping with the outer wall. 2. The side wall pressing means is provided with a roller arm swingably on both sides on a pressing plate, and a rotatable roller is mounted on a lower end of each roller arm, and each roller arm is moved outward by a spring. 2. The box making device according to claim 1, wherein the box making device has a biased configuration.