JPH08174721A - Correcting device of box - Google Patents

Abstract

PURPOSE: To correct a shape deformed due to slipped front end to a correct shape by a method wherein a folding box is struck against a correcting plate at high speed and, in addition, by being stopped, the upper surface and the lower surface are pushed forwards due to the frictional force developing between conveyor belts and the upper and the lower surfaces. CONSTITUTION: By pinching two widthwise positions of a folding box with a lower conveyor belt 12 and an upper conveyor belt 13, an accelerating conveyor 11 carries the folding box at high speed so as to widen the interval between folding boxes, which are carried in succession. When the folding box passes through a box sensor 23 and reaches near a correcting plate 22, a driving device 24 is put into actuation so as to move the correcting plate 22 to its stopping position. The front end of the folding box is struck against the correcting platen 22, resulting in rightly correcting the state of deformed shape developed through the slippage of the front end of the folding box. The folding box is stopped temporarily and then pushed forwards by the frictional force developing between the folding box and the upper and the lower conveyor belts, since the upper and the lower conveyor belts 12 and 13 are under actuation, resulting in correcting the deformed shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is for preventing a distorted bonding and a distorted shape when a cardboard, a corrugated cardboard, etc. are folded and bonded by a box making machine to form a box. , A box straightening device used to correct misalignment.

[0002]

2. Description of the Related Art The conventional process of making a box with a box making machine is as follows.

For example, in the case of the so-called bottom-attached type box shown in FIG. 4, while the box material 1 shown in FIG. Bending the streak, applying adhesive to the adhesive parts 2, ..., to bring it to the state of B in the same figure, and further bending other bending lines, combining the adhering parts 2, ..., and forming the folding box 3 of the same figure C. To do.

After that, the folding boxes are further accelerated by an accelerating conveyor to increase the space between the folding boxes that are continuously conveyed, and then the folding boxes are superposed on each other by a pressure conveyor and bonded at a low speed. Hold the part and hold it to complete the folding box. Here, the reason why the interval is increased by using the acceleration conveyor is to prevent problems such as clogging when stacking the folding boxes at the inlet of the pressure conveyor.

In this manufacturing process, as shown in FIG. 4, in the case where the box material has a large width, that is, a box having a shallow shape, a position shift occurs at the time of bonding and a distorted shape,
For example, the shape is likely to be a folding box 3'shown by an imaginary line in FIG.

As a countermeasure against this, there has been conventionally known a straightening device or the like for colliding the front end of a folding box with a wall so that a large number of sheets are stacked and pressed.

In this conventional straightening device, since the folding box is straightened by collision, a sufficient straightening effect is not always obtained. Further, the shape of the folding box to be manufactured, the work of resetting each part corresponding to the size is complicated, and in particular, in order to switch between the use and non-use of the correction device, it is necessary to change the process. It requires a lot of work.

[0008]

Therefore, according to the present invention, a sufficient straightening effect can be obtained, and when the shape and dimensions of the folding box are changed, switching between use and non-use of the straightening device is simple and quick. The purpose is to realize a new orthodontic device that can

[0009]

According to the present invention, a box material is conveyed horizontally while being folded and bonded to form a folding box, and the folding box is further accelerated by an acceleration conveyor to continuously convey the box material. In the box making machine that completes the folding box, expand the gap between the folding boxes that are transported and then press the adhesive boxes while transporting the folding boxes by stacking the folding boxes on top of each other. Correction that is provided in the vicinity, is provided on each conveyor belt of this acceleration conveyor, and has a shape that sandwiches both sides of the conveyor belt, and that the width direction position is set according to the conveyor belt when adjusting the width direction position of the conveyor belt. A plate, a box sensor provided in front of the straightening plate of the acceleration conveyor, for detecting passage of a folding box, and a folding sensor that receives the signal from the box sensor to move the straightening plate and is conveyed. Pause against the front end of the box, to straighten the box front, a correction device of a box comprising a drive device for passing subsequently retracted by folding box.

Further, according to the present invention, in the above apparatus, the straightening plate is coupled to the frame supporting the conveyor belt of the acceleration conveyor, and the width direction position setting operation is not necessary when adjusting the width direction position of the conveyor belt. Including a box straightening device.

In each of the above devices, the drive device has a rotary shaft, and the straightening plate swings around this rotary shaft, or has the rotary shaft and the straightening plate rotates in one direction around this rotary shaft. , And the axis of rotation is preferably located at the bottom of the folding box.

Further, according to the present invention, in each of the above devices, the straightening plate is held at the retracted position when the straightening device is not used.
Alternatively, it includes the one that is removed from the box making machine alone or together with the driving device.

[0013]

EXAMPLES Examples of the present invention will be specifically described below.

The straightening device 10 is attached to an acceleration conveyor 11 of a box making machine.

The accelerating conveyor 11 includes two lower conveyor belts 12, 12 arranged in parallel and two upper conveyor belts 13, 12 arranged in parallel.
13, the folding box 3 is sandwiched from above and below at two positions in the width direction and conveyed.

A lower frame 14 (only one is shown) of 2 for supporting the lower conveyor belts 12, 12 is a guide body 15, 15 attached to a frame (not shown) of a box making machine.
It can be moved in the width direction (direction perpendicular to the paper surface of FIG. 1) along the guide body, and its position is adjusted according to the shape and size of the box. Two upper frames 16 that respectively support the upper conveyor belts 13, 13.
(Only 1 is shown) is supported by guide bodies 17, 17 attached to a frame (not shown) of the box making machine, and can be moved in the width direction (perpendicular to the plane of FIG. 1) along the guide bodies. The position can be adjusted according to the shape and size of the box. The lower frame 14 has a large number of rollers 1
, ..., but the upper frame 16 has many spring-loaded rollers 1
, 9 are provided respectively to press the lower conveyor belt 12 and the upper conveyor belt 13 from the back surface.

The lower frame 14 is provided with a lower projecting frame 20 for supporting the tip of the lower transport belt 12 so as to project forward (to the left in FIG. 1). By adjusting the projecting amount, the next process is added. The leading end position of the lower conveyor belt 12 for delivering the folding box to the pressure conveyor (not shown) is set appropriately according to the shape and size of the box. In the upper frame 16,
An upper protruding frame 21 that supports the tip of the upper conveyor belt 13.
Is provided so as to project forward, and by adjusting the amount of projection, the tip position of the upper conveyor belt 13 that delivers the folding box to the pressure conveyor in the next step is set according to the shape and size of the box. .

This straightening device 10 comprises two straightening plates 22,2.
2, the box sensors 23, 2 drive devices 24, 24.

The straightening plates 22 and 22 are provided on the two sets of upper and lower conveyor belts 12, 12, 13 and 13, respectively, and have a shape sandwiching both sides of the conveyor belt.

The box sensor 23 is a transmissive optical sensor and is provided in the vicinity of the end portions of the lower frame 14 and the upper frame 16 of 1 and detects passage of the folding box 3.

The drive devices 24, 24 are mainly composed of swing actuators 25, 25, and have a mounting frame 26,
By means of 26, they are detachably attached below the downward projecting frames 20, 20, respectively. This swing actuator 25 has a rotary shaft 27 in the lower part of the lower conveyor belt 12, to which a straightening plate 22 is detachably attached, swings the straightening plate 22, and makes it stand upright so that the front end of the folding box 3 is contacted. A stop position (shown by a solid line in FIG. 1) and a retracted position (shown by a virtual line in FIG. 1) where the front end is inclined in the transport direction and the folding box is passed are set. Furthermore, this drive device has a control device (not shown), which allows the box sensor 2
In response to the signal from 3, the folding box is moved to the stop position with a delay until it is conveyed from the box sensor position to the straightening plate position, and then moved to the retracted position with a delay to straighten the front end of the box. To operate. Specifically, for example, the pulse generator is actuated by the conveyor belt 12 or 13, the signal from the box sensor 23 is received, the preset number of pulses is counted, and then the swing actuator 25 is actuated to correct the pulse. After moving the plate to the stop position and counting a predetermined number of pulses, the swing actuator 25 is operated to move the straightening plate to the retracted position. The drive devices 24, 24 can hold the correction plates 22, 22 in the retracted position.

The straightening device 10 has the above-mentioned structure.
It is used and works as follows.

The straightening device 10 is attached to the accelerating conveyor 11 of the box making machine and used as described above. When the folding box 3 is fed into the acceleration conveyor 11 from the right side in FIG. 1, the acceleration conveyor 11 sandwiches two places in the width direction of the folding box 3 with the lower conveyance belt 12 and the upper conveyance belt 13 and moves at high speed. Increase the distance between the folding boxes that are transported and transported in sequence. After that, when the folding box 3 passes through the box sensor 23 and reaches the vicinity of the straightening plate 22, the driving device 24 is activated and the straightening plate 22 moves to the stop position. Folding box 3
Causes the front end to collide with the straightening plate 22 at a high speed, thereby correctly correcting the state in which the front end is displaced and has a distorted shape. Further, the folding box 3 is temporarily stopped, and at this time, since the upper and lower transport belts 12 and 13 are operating, the upper and lower surfaces of the folding box 3 are pushed forward by the frictional force, which also causes the distorted shape. It is straightened and therefore a high straightening effect is obtained. At this time, since the correction plate 22 has a shape sandwiching both sides of the conveyor belt, it can receive the frictional force from the front and generate a force for rotating the upper surface or the lower surface of the folding box 3 about the vertical axis. Correctly correct the shape. After that, the straightening plate 22 moves to the retracted position, and the straightened folding box 3 is conveyed and sent to the next pressure conveyor.

When changing the shape and dimensions of the folding box manufactured by this box making machine, the upper and lower frames 14 and 16 of the accelerating conveyor 11 are moved along the guide members 15 and 17 to move the upper and lower conveyor belts 12 and 13. The position in the width direction is adjusted, and further, the protrusion amount of the vertical protrusion frames 20 and 21 is adjusted. At this time, in the straightening device 10, since the straightening plates 22 and 22 are attached to the lower projecting frames 20 and 20 together with the driving devices 24 and 24, even if the vertical conveying belts 12 and 13 are adjusted in the width direction. The condition that the straightening plate sandwiches the conveyor belt is maintained, and no special width direction position setting operation is required. The position adjustment in the lengthwise direction is usually unnecessary, but the mounting position of the mounting frame 26 to the downward projecting frame 20 is adjusted if necessary. Further, when the distance between the box sensor 23 and the correction plate 22 changes, the operation of the drive device 24 is adjusted. Specifically, in the example including the control device using the pulse generator described above, the count value from box detection to rocking actuator operation is reset.

When the correction device 10 is not used,
The drive device 24 holds the straightening plate 22 in the retracted position to make it inoperative, the straightening plate 22 is removed from the rotating shaft, or the mounting frame 26 is attached to the downward projecting frame 2
Then, the straightening plate 22 and the driving device 24 are removed from the box making machine.

In the mounting structure of the straightening plate, in the above example, the straightening plate is connected to the downward projecting frame through the driving device, but even in other configurations, the straightening plate is attached to the frame supporting the conveyor belt. If they are connected to each other, a special width direction position setting operation becomes unnecessary by adjusting the width direction position of the conveyor belt as in the above example. Of course, if the widthwise position setting operation of the straightening plate is separately performed according to the widthwise position adjustment of the conveyor belt, any mounting structure of the straightening plate may be used as long as it is movable in the widthwise direction. be able to.

Although the transmission type optical sensor is used as the box sensor in the above example, any other type such as a reflection type optical sensor, an ultrasonic sensor, a contact type sensor or the like can be used as long as it can detect passage of the folding box. Is.

In the above-mentioned example, the drive device swings the correction plate, but it can also rotate in one direction. That is, like the drive device 24 'of the straightening device 10' shown in FIG. 3, the straightening plate 22 'of 4 is rotated in one direction by the servomotor 25', and is rotated one-eighth from the stop position shown by the solid line in the figure. It is also possible to move to the retracted position indicated by the phantom line, further rotate one-eighth in the same direction, and move to the stop position again.

Although the above-mentioned example and the driving device of FIG. 3 each have a rotary shaft and rotate the correction plate around this rotary shaft, other motions such as linearly moving up and down are performed. It may be used. However, the use of the rotary motion has an advantage that after the folding box is straightened, the straightening plate is moved away from the front end of the box in the front direction so that unnecessary force is not applied to the straightened box.

The rotary shaft may be provided at any of the upper and lower parts of the folding box, but if it is provided at the lower part as in the above example and the example of FIG. 3, when the straightening plate separates from the box, Since the upper surface of the box, which is more likely to cause a shift, is separated first, there is an advantage that the shift is less likely to occur after the correction.

Further, in the above example, the driving device is provided for each straightening plate, but it is also possible to provide only one and drive all the straightening plates. The control device included in the drive device can be configured to use a timer in addition to the one using the pulse generator as in the above example.
The correction plate may be activated at a predetermined timing.

In the above example, when the straightening device is not used, the method of holding the straightening plate in the retracted position, the method of removing it independently, and the method of removing it together with the drive device can be used, but only one or two of them can be used. May be used.

[0032]

As described above, in the straightening device of the present invention, the folding box is caused to collide with the straightening plate at a high speed, further stopped, and the upper and lower surfaces are pushed forward by the frictional force with the conveyor belt.
It is possible to effectively correct a distorted shape in which the front end is displaced to a correct shape. Moreover, since the correction plate has a shape that sandwiches both sides of the conveyor belt, it receives the frictional force from the front side and surely corrects it to an accurate shape.

When the shape and dimensions of the folding box manufactured by the box making machine are changed, the straightening device of the present invention basically positions the straightening plate in the width direction so as to maintain both sides of the conveyor belt. Setting operation is simple because only setting is required.

Particularly, it is convenient to connect the straightening plate to the frame that supports the conveyor belt, because a special width direction position setting operation for the straightening device is not required.

Further, according to the present invention, it is not necessary to change the process for switching the use and nonuse of the straightening device. That is, when not in use, it is sufficient to hold the straightening plate in the retracted position with the straightening device attached, remove the straightening plate alone, or remove the straightening plate together with the drive device. is there.

[Brief description of drawings]

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

FIG. 2 is a sectional view taken along line AA in the previous figure.

FIG. 3 is a side view of another embodiment of the present invention.

FIG. 4 is an explanatory view showing a folding box which is a target of the present invention.

[Explanation of symbols]

1 ... Box material, 3, 3 '... Folding box, 10 ... Box straightening device, 11 ... Accelerator, 12 ... Lower conveyor belt, 13 ...
Upper transport belt, 21 ... Lower protruding frame, 14 ... Lower frame, 22, 22 '... Straightening plate, 23 ... Box sensor, 24 ... Driving device, 27 ... Rotating shaft.

Claims (6)

[Claims] 1. A folding box is formed by bending and adhering a box material while transporting the box material horizontally, and further accelerating the folding box with an accelerating conveyor so that the folding boxes are continuously conveyed. In the box-making machine that completes the folding box by holding the adhesive part while holding the adhesive box while conveying it by stacking the folding boxes on top of each other with a pressure conveyor, this accelerating conveyor is installed. A correction plate which is provided on each of the conveyor belts and has a shape sandwiching both sides of the conveyor belt, and whose width direction position is set in accordance with the conveyor belt when adjusting the width direction position of the conveyor belt; A box sensor provided at the front position of the plate to detect passage of the folding box, and the correction plate is moved in response to a signal from the box sensor, and the front end of the folding box to be conveyed is applied to temporarily stop. It is allowed, to straighten the box front, correction device box comprising a drive device for passing the folding box and then retreated. 2. The correction plate according to claim 1, wherein the straightening plate is connected to a frame that supports the conveyor belt of the acceleration conveyor, and a width direction position setting operation is not necessary when adjusting the width direction position of the conveyor belt. A box straightening device. 3. The box straightening device according to claim 1, wherein the drive device has a rotary shaft, and the straightening plate swings around the rotary shaft. 4. The box straightening device according to claim 1, wherein the drive device has a rotation axis, and the straightening plate rotates in one direction around the rotation axis. 5. The box straightening device according to claim 3, wherein the rotating shaft is located at a lower portion of the folding box. 6. The straightening plate according to claim 1, 2, 3, 4 or 5, when the straightening device is not used, the straightening plate is held in the retracted position, or is removed from the box making machine alone or together with the driving device. A box straightening device.