JP2805578B2 - Bending auxiliary equipment for box making machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box making machine which can reliably perform a bending operation when a paper box material is horizontally transferred and bent along a folding line in a direction intersecting the transfer direction. The present invention relates to a folding assisting device used for forming

[0002]

2. Description of the Related Art In a box making machine, a rear portion of a folding line is lifted up along a folding line in a direction intersecting a transfer direction while a paper box material is horizontally transferred from the rear to the front. There is a process to bend forward. At this time, naturally, it is necessary that the front portion of the bending line does not rise with the rear portion. However, since the rear portion is folded over the front portion, the rear portion cannot be pressed by rollers, guide pieces, or the like. For this reason, this front part floats, and it may not be able to bend normally.

As a countermeasure, it has been proposed to provide a suction box on the lower surface of a paper box material and to perform vacuum suction (see Japanese Patent Publication No. 3-9862).

[0004] This suction box must be prepared and selected according to the size and shape of the paper box material, and is inconvenient to handle. In addition, the lower surface of the paper box material is often printed, and the upper end of the suction box may rub it, possibly damaging the printed surface.

[0005] Prior to the above-mentioned bending of the rear portion, there may be a step of pulling up the front portion of another bending line in front of the bending line upward with a hook and bending it rearward. In this case, as described above, when the rear portion is bent, the front portion of the rear bending line cannot be pressed by a roller, a guide piece, or the like. The front portion may return to its original position, and hinder subsequent processing.

As a countermeasure, it has been proposed to provide a brush above a paper box material (see Japanese Utility Model Publication No. Hei 3-6422).

This brush has an upper surface of a bent front portion,
That is, since the lower surface of the paper box material is rubbed, there is a possibility that the printed surface here may be damaged.

Accordingly, the present invention assists in reliably bending the rear portion as described above, prevents the already bent front portion from returning to its original position, and also provides a printed surface of the paper box material. An object of the present invention is to provide a bending assist device that can be easily used without causing any damage.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a paper box material is transported horizontally from the rear to the front, while a rear portion of the paper box material is pushed up along a folding line in a direction intersecting the transport direction. A base member installed at a bent portion of the box making machine to be bent upward and provided on an upper portion of the box making machine; a swing member having a rod body swingably attached to the base and extending downward; A spring provided between the moving member and the base for biasing the tip of the rod body rearward, and a spring provided on the base for abutting the swinging member to prevent the rod tip from excessively moving rearward. The bar body tip is set to be located slightly above the folding line at the start of bending and slightly above the paper box material, and the bending line front portion of the paper box material rises during bending. This is a folding auxiliary device of a box making machine for preventing the occurrence of the problem.

The present invention also includes a device using the same mechanism as the above device for preventing levitation for preventing return of a front portion of a bending line. That is, while transporting the carton material horizontally and moving it from the rear to the front, along the crease in the direction intersecting the transfer direction, pull up the front part of the carton material and bend it upward and backward. Along the other folding line, it is installed at the bent part of the box making machine that pushes up the rear part and bends it forward and upward, and it is swingably attached to the base provided at the top of the box making machine and this base. A swing member having a rod extending downward, a spring provided between the swing member and the base, and a spring for urging the tip of the rod backward, the swing member being provided on the base and abutting the swing member. And a stopper for preventing the rod tip from excessively moving backward. The rod tip is located slightly forward of the rear folding line at the start of bending and slightly above the paper box material. To prevent the already bent front part from returning. Including folding auxiliary equipment manufacturing box machine.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention.

FIGS. 1 to 3 show examples in which the folding assist devices 10 and 10 are used for preventing floating.

As shown in FIG. 1, this box-making machine 11 processes a horizontal paper box material 12 while transferring it horizontally from back to front (from right to left in the figure). The devices 10, 10 along the creases 13, 13
It is installed at a bent portion 15 that bends the glue margins 14, which are the rear portions.

In the bent portion 15, the paper box material 12 is
Two portions near the center are sandwiched from above and below by four belt conveyors 16,..., And both ends are placed on support guides 17, 17 and transported from right to left in the figure. In addition,
The paper box material 12 is already folded in the pre-process,
8, the front glue margins 19 and 19 are bent.

At the lower part of the bent portion 15 along the support guides 17, 17, rear bending machines 20, 20 are provided. The rear bending machine 20 has two rotating shafts 21.
Are operated in synchronism with the transfer of the paper box material 12, and the nail body 22 is rotated at a high speed to ascend from below while pushing the glue margin 14 upward from behind and bending. ,
Next, the rotation is temporarily stopped, and the glue margin 14 is bent forward and pressed as it is, and after the glue margin 14 has passed by the transfer of the paper box material 12, it is further rotated and proceeds downward, and is rotated exactly 180 degrees, and is rotated by another 180 degrees. It stops when the claw body 22 is ready for the next operation.

Since the folding assisting devices 10 and 10 are symmetrical, only one of them will be described below. As shown in FIG.
Comprises a swing member 24 attached to a base 23. Base 23
Is provided at the lower end of the support rod 25, and the support rod 25
It is attached to an auxiliary arm (not shown) extending upward from a machine (not shown) of the box making machine 11. The box making machine 1
1 is usually provided with screw holes for attaching an auxiliary arm at various places on the machine base so that auxiliary tools such as the auxiliary devices 10 can be mounted at arbitrary positions. The swinging member 24 is provided with a mounting piece 27 at the base of a rod 26 extending downward. The mounting piece 27 is fitted to a mounting shaft 28 fixed to the base 23, and the mounting piece 28 is Swingable. A spiral spring 29 is provided between the root of the rod 26 and the mounting shaft 28 of the base 23, whereby the tip of the rod 26 is urged rearward. At the lower end of the base 23, a stopper 30 is provided,
The rod 26 is brought into contact with this, so that the rod 26 does not move backward from a state of extending substantially vertically.

In these bending assisting devices 10, 10, the tips of the rods 26, 26 are located slightly forward of the folding lines 13, 13 when the rear folding machines 20, 20 start to bend. It is set so as to be positioned slightly above the paper box material 12.

Since these folding assisting devices 10, 10 have the above-described configuration, the rear folding machines 20, 20 have a glue margin of one.
When bending the rods 4 and 14, the ends of the rods 26 and 26 are
The floating of the front portions of the members 3 and 13 is prevented so that the bending can be surely performed. When the glue allowances 14 are further bent and folded forward, the rods 26, 26
The tip is pushed away and escapes forward without getting in the way.

FIGS. 4 to 6 show an example in which the folding assist device 40 is used to prevent the folded front portion from returning.

As shown in FIG. 4, the folding assisting device 40 folds the rear panel 42, which is the rear portion, forward and upward along a folding line 41, which is another portion of the box making machine 11, and at the same time, Along the bending lines 43, 43 extending obliquely, the rear panel 42 is provided at a bent portion 45 for bending the corners 44, 44 of the rear panel 42 rearward.

At the bent portion 45, the paper box material 12
Both ends are sandwiched from above and below by four belt conveyors 46,... And are transported from right to left in the figure. Note that the paper box material 12 has already been formed along the creases 47 in the previous process.
The front panel 48, which is the front portion, is bent rearward and upward, and along bend lines 49, 49 extending obliquely,
Corners 50, 50 of the front panel 48 are bent forward.

A rear bending machine 51 is provided at the lower center of the bending section 45. This rear bending machine 51
It is the same as the above-mentioned rear bending machine 20 and has claw bodies 53 and 53 of rotary shafts 52 and 2 and pushes up and bends the rear panel 42 upward from behind.

The bending portion 45 includes a bending guide 5
4, 54 are provided. This bending guide 54
It is formed by cutting and removing a part of a square bar that extends long in the transport direction of the paper box material, and at a position where the rear panel 42 is bent,
The guide surfaces 55, 55 become 45 degree inclined surfaces, and are formed so that they gradually become horizontal as they move forward. For this reason, the rear panel 42 is bent forward and upward, and at the same time, the corners 44, 44 thereof are formed.
Strikes the guide surfaces 55, 55 of the bending guide, is bent rearward along the folding lines 43, 43, and is gradually pressed. The guide surfaces 55, 55 similarly have a portion that changes from an inclined surface to a horizontal surface behind the above-described position, and when the front panel 48 is bent in the previous process, the corners 50, 50 are bent. When it reaches the bent portion 45, it returns to the inclined surface again in preparation for bending of the rear panel 42.

The bending assisting device 40 has the same configuration as that of the folding assisting device 10 and includes a base 56 and a swinging member 57. The only difference from the bending assist device 10 is that the tip of the rod 58 of the swinging member 57 is bent in an arc shape.

Further, the bending portion 45 is provided with a floating assisting bending assisting device 59 having exactly the same configuration as the folding assisting device 10. This bending assist device 59
In the same manner as in the previous example, the tip of the rod body 60 is located slightly ahead of the position of the fold line 41 when the rear bending machine 51 starts to bend and slightly above the paper box material 12. And the floating of the paper box material 12 is prevented.

In the folding assist device 40, since the rear folding machine 51 operates in front of the folding assist device 59, the guide surfaces 55 of the folding guides 54 are inclined at 45 degrees. The position of the tip of the rod 58 is set slightly higher than that of the rod 60.

Since the bending assist device 40 has the above-described structure, the front panel 48 bent in the previous process is used.
However, the guide surfaces 55, 55 of the bending guides 54, 54
When the rear panel 42 is bent, the rod 58 pushes the front panel 48 backward when it reaches the position where the rear panel 42 is inclined, but prevents the rod from returning. Also,
Since the rod 58 can escape forward by a spring, no excessive force is applied to the front panel 48. In addition,
The folding assist device 59 also has a similar return preventing action to the front panel 48.

[0028]

As described above, the bending assist device of the present invention sets the tip of the rod to the position immediately before the folding line when bending the paper box material, and prevents this position of the paper box material from floating. Therefore, the rear portion can be reliably bent. In addition, since the rod body is positioned slightly forward of the bending line and the already bent front portion can be pushed backward, there is an effect of preventing the front portion from returning to the original position. Since the tip of the rod body can escape forward by a spring, it does not apply excessive force to the paper box material, does not hinder bending, and does not rub the surface strongly and damage the printing surface. Furthermore, by simply adjusting the installation position, it is possible to handle various paper box materials having different sizes and shapes, and it is possible to easily handle the materials.

[Brief description of the drawings]

FIG. 1 is a plan view showing a first embodiment of the present invention.

FIG. 2 is a central longitudinal sectional view of the same example.

FIG. 3 is an enlarged view of a main part of the same example.

FIG. 4 is a plan view showing a second embodiment of the present invention.

FIG. 5 is a central longitudinal sectional view of the same example.

FIG. 6 is an end view taken along the line VI-VI in FIGS. 4 and 5;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Bending assistance apparatus, 11 ... Box machine, 12 ... Paper box material, 13 ... Bending line, 14 ... Glue allowance, 15 ... Bending part, 16
... belt conveyor, 20 ... rear bending machine, 23 ... base,
Reference numeral 24: swinging member, 25: support rod, 26: rod, 27: mounting piece, 28: mounting shaft, 29: spring, 30: stopper, 40: bending assisting device, 41: bending line, 42: rear panel, 43: bent line, 44: corner portion, 45: bent portion,
46: belt conveyor, 47: bending line, 48: front panel, 49: bending line, 50: corner, 51: rear bending machine, 54: bending guide, 55: guide surface, 56: base, 57: rocking Moving member, 58: rod, 59: bending assist device.

Claims (2)

(57) [Claims] 1. While transporting a paper box material horizontally from the rear to the front, along a folding line in a direction intersecting the transport direction,
A base installed on a bent portion of a box making machine that pushes up a rear part of a paper box material and bends forward and upward, a base provided on an upper part of the box making machine, and a rod that is swingably attached to the base and extends downward. A swinging member having a body,
A spring provided between the swinging member and the base, for urging the tip of the rod body backward, and a spring provided on the base, for bringing the swinging member into contact, and the tip of the rod moves excessively backward. The tip of the rod body is set to be located slightly above the folding line at the start of bending and slightly above the paper box material, and the front portion of the folding line of the paper box material is bent at the time of bending. An auxiliary device for folding a box making machine that prevents it from rising. 2. While moving the paper box material horizontally from the rear to the front, along the folding line in the direction intersecting the transport direction,
After pulling up the front part of the paper box material and bending it upward and backward, it is installed at the bending part of the box making machine that pushes up the rear part and bends forward and upward along the other bending line behind the bending line. A base provided on the upper part of the box making machine, and a swinging member having a rod extending to the base and swinging downward,
A spring provided between the swinging member and the base, for urging the tip of the rod body backward, and a spring provided on the base, for bringing the swinging member into contact, and the tip of the rod moves excessively backward. The tip of the rod body is set to be located slightly ahead of the rear bending line at the start of bending and slightly above the paper box material, and the front part that has already been bent is Auxiliary device for box-making machine to prevent returning to