JP7307316B2 - Blank sheet take-out device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an apparatus for taking out blank sheets such as corrugated cardboard or cardboard from a magazine one by one.

2. Description of the Related Art Conventionally, as a blank sheet take-out device used for a wrap-around caser or the like, one described in Patent Document 1 is known. This pick-up device has a main suction mechanism and a sub-suction mechanism. Both of these suction mechanisms have a suction pad attached to the tip of a rotatably provided arm member. It is configured to abut on the blank sheet positioned at the bottom among the blank sheets stacked in the magazine, and to pick up the blank sheet from the magazine by being attracted to the blank sheet.

As another take-out device, the one described in Patent Document 2 is also known. In this take-out device, the position of the suction portion that suctions the blank sheets in the magazine can be adjusted with respect to the arm member, and the attachment position of the suction portion can be changed according to the shape of the blank sheet.

Japanese Utility Model Publication No. 7-445 Japanese Patent No. 4641256

In recent years, corrugated cardboard with pre-formed perforations for unpacking has been increasing. Accordingly, the blank sheet may break at the perforations. Although the device described in Patent Document 2 can adjust the mounting position of the suction portion, no specific configuration for the adjustment is disclosed. That is, conventionally, the mounting position of the suction unit is manually changed, and the position of the suction unit must be changed each time the type of blank sheet is changed, which is troublesome.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a blank sheet unloading device that can easily and quickly adjust the position of a suction portion on an arm member according to the type of blank sheet.

A blank sheet take-out device according to the present invention comprises a magazine for holding a plurality of blank sheets in a stacked state, suction means for sucking and holding the blank sheet positioned at the bottom of the magazine, and suction means and the magazine at a predetermined position. an arm member for reciprocating between them, a slider that supports the adsorption means and is movably provided along the arm member, and a moving means that moves the slider along the arm member, the moving means comprising: A swinging member provided swingably around a rotating shaft, a connecting rod connected to a swinging end of the swinging member and connected to a slider, and a motor for changing the rotation angle of the swinging member. The moving means can arbitrarily change the position of the attracting means in the longitudinal direction of the arm member by moving the slider by changing the rotation angle of the rocking member.

The moving means may be configured to change the position of the attracting means in the longitudinal direction of the arm member to a position that does not interfere with the taken-out blank sheet after the attracting means has descended to the predetermined position.

According to the present invention, it is possible to obtain a blank sheet take-out device that can easily and quickly adjust the position of the suction means on the arm member according to the type of blank sheet, and that can be used for blank sheets of various configurations.

1 is a perspective view showing a schematic configuration of a wrap round caser provided with a blank sheet take-out device according to an embodiment of the present invention; FIG. It is a side view which shows the take-out apparatus of 1st Embodiment. FIG. 2 is a side view showing a main part of the take-out device of FIG. 1; FIG. 2 is a plan view showing a main part of the take-out device of FIG. 1; FIG. 11 is a side view for explaining another example of the operation of the take-out device of the first embodiment; It is a side view which shows the take-out apparatus of 2nd Embodiment. It is a top view which shows the main adsorption|suction part of 2nd Embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a wrap round caser provided with a blank sheet take-out device that is an embodiment of the present invention. A plurality of blank sheets B are held in a stack in a magazine (not shown), and one blank sheet B located at the bottom is taken out and fed onto the transport conveyor 10, as will be described later. In this take-out step, the blank sheet B is folded at right angles at the front fold line P1 and the rear fold line P2.

In this embodiment, one blank sheet B on the transport conveyor 10 is supplied with a container group A consisting of 10 containers C arranged in 5×2 rows. The container group A is pushed from the side of the transport conveyor 10 by the pusher 11 and transferred onto the bottom flap P3 between the folding lines P1 and P2. After this transfer process, the upper flap P4 and the side flap P5 of the blank sheet B are folded while being conveyed by the conveyer 10, and the container group A is packed.

The configuration of the take-out device of the first embodiment will be described with reference to FIGS. 2 to 4. FIG.
A plurality of blank sheets B are stacked and accommodated in the magazine 12 . The magazine 12 has a plurality of flat plate-like members 13 extending parallel to each other, and each flat plate-like member 13 is provided at its lower end with an engaging claw 14 with which the lowermost blank sheet B is engaged. Each flat plate-shaped member 13 is inclined at a predetermined angle with respect to the horizontal plane, and the blank sheets B in the laminated state are inclined so that the upstream side (left side in FIG. 2) in the conveying direction (arrow X) of the conveying conveyor 10 is lowered. maintained in state.

Below the magazine 12, an arm swing shaft 20 extends in a direction perpendicular to the conveying direction of the conveyer 10. On the arm swing shaft 20, a pre-pickup arm 21 and a main pick-up arm (arm member) 22 swing. Can be installed freely. A preliminary suction portion 23 is provided at the swing end of the preliminary extraction arm 21 , and a pair of main suction portions (suction means) 24 are provided at the swing end of the main removal arm 22 . A pair of book suction portions 24 are provided across the longitudinal axis of the book take-out arm 22 (FIG. 4). The preliminary suction part 23 and the main suction part 24 are, for example, suction cups, which are connected to a negative pressure source (not shown) and receive negative pressures independently of each other to suck and hold the blank sheet B. As shown in FIG.

The pre-pickup arm 21 is swingably driven by a drive mechanism (not shown), and the inclined position (broken line in FIG. 2) where the pre-suction part 23 abuts on the blank sheet B in the magazine 12 substantially coincides with the conveying surface of the conveyer 10 . It reciprocates to and from the horizontal position (solid line in FIG. 2). The book take-out arm 22 is swingably driven by the drive mechanism 25, and is between the inclined position (broken line in FIG. 2) where the book suction portion 24 contacts the blank sheet B in the magazine 12 and the horizontal position (solid line in FIG. 2). to reciprocate with . The horizontal position of the take-out arm 22 is a stop position (predetermined position) for transferring the blank sheet B to the conveyor 10, and the take-out arm 22 reciprocates between the magazine 12 and the stop position.

A standing guide 17 is provided directly below the magazine 12 . The erecting guide 17 is closer to the transport conveyor 10 than the pre-sucking section 23 when the pre-pickup arm 21 is in the horizontal position, and above the main sucking section 24 when the main pick-up arm 22 is in the horizontal position. That is, the erecting guide 17 is located on the upstream side of the conveyer 10, and is located between the position outside the upstream pulley 16 of the conveyer 10 (solid line in FIG. 2) and the upstream end of the conveyer 10 (broken line in FIG. 2). It can freely reciprocate linearly. The blank sheet B is transferred onto the transport conveyor 10 from the stop position by the forward motion of the erecting guide 17 .

While the pre-suction portion 23 is fixed to the pre-pickup arm 21 , the main suction portion 24 is movable along the longitudinal direction of the main pick-up arm 22 . Next, a configuration for arbitrarily changing the position of the main suction portion 24 in the longitudinal direction of the main take-out arm 22 will be described.

A rail 30 is provided on the upper surface of the main take-out arm 22 . The slider 31 is slidably supported by the rails 30 and is movable along the longitudinal direction of the pick-up arm 22 . The main adsorption portion 24 is supported by the tip of a support member 32 fixed to the slider 31 . The rear end of the support member 32 is connected to a moving mechanism (moving means) for moving the slider 31 along the book take-out arm 22 . This moving mechanism has a swinging member 34 swingably provided around a rotating shaft 33, and a connecting rod 35 connecting the swinging end of the swinging member 34 and the support member 32, that is, the slider 31. As shown in FIG. The rotary shaft 33 extends parallel to the arm swing shaft 20 and is rotationally driven by a motor 36 .

Next, the operation of this embodiment will be described.
First, the preliminary pick-up arm 21 swings upward from the horizontal position and is set at the inclined position (broken line in FIG. 2), and the preliminary suction portion 23 comes into contact with the lowermost blank sheet B, ie, the frontmost blank sheet. At this time, the main take-out arm 22 is still set in the horizontal position. In this state, a negative pressure is introduced to the pre-adsorption section 23, and the pre-adsorption section 23 adheres to the lowermost blank sheet B. As shown in FIG. This separates the blank sheet B from the other blank sheets immediately above it.

While the pre-pickup arm 21 is at the tilted position, the main pick-up arm 22 swings upward and is set at the tilted position (broken line in FIG. 2), and the main suction section 24 contacts the blank sheet B. As shown in FIG. Then, a negative pressure is introduced to the main adsorption section 24, and the main adsorption section 24 adsorbs the blank sheet B. As shown in FIG. From this state, the blank sheet B is released from the engaging claw 14 and taken out from the magazine 12 by swinging the preliminary take-out arm 21 and the main take-out arm 22 downward. At this time, the upper end of the blank sheet B is engaged with a guide member (not shown), whereby the blank sheet B is folded at the front folding line P1.

While the pre-pickup arm 21 and the main pick-up arm 22 swing further downward, the negative pressure of the pre-pickup portion 23 is released, and the blank sheet B is sucked only by the main pick-up portion 24, and the main pick-up arm 22 It is displaced downward according to the swing of the At this time, the lower end of the blank sheet B is engaged with the erecting guide 17, whereby the blank sheet B is folded up to a predetermined angle at the rear fold line P2. After that, the main take-out arm 22 swings to a horizontal position, so that the blank sheet B is folded at right angles at the front fold line P1 and the rear fold line P2, respectively, and the bottom flap P3 is positioned at the same position as the conveying surface of the conveyer 10. . At this point, the negative pressure of the main adsorption portion 24 is released, the erecting guide 17 advances (broken line in FIG. 2), and the blank sheet B is transferred onto the transport conveyor 10 .

According to this embodiment, even if the blank sheet B has perforations for unpacking, for example, by adjusting the suction position of the main suction unit 24 with respect to the blank sheet B to an appropriate position, , it is possible to prevent the blank sheet B from being damaged at the perforations in the take-out operation from the magazine 12 . The position adjustment of the main suction section 24 is performed by changing the rotation angle of the swing member 34 and moving the slider 31 with respect to the main pickup arm 22 while the main pickup arm 22 is stationary. That is, the position of the main suction portion 24 in the longitudinal direction of the main pick-up arm 22 can be adjusted simply by driving the motor 36 to rotationally displace the rocking member 34, and the adjustment work can be performed very easily and quickly.

Further, according to this embodiment, since the position of the main suction portion 24 on the main take-out arm 22 can be changed, it becomes easy to adjust so that the take-out operation of the blank sheet B can be performed stably and at high speed.

In the operation of taking out the blank sheet B described above, the main suction portion 24 is fixed at a fixed position in the longitudinal direction of the main take-out arm 22, but it may be changed as described below with reference to FIG. . 5, the preliminary extraction arm 21 and the preliminary adsorption section 23 are omitted in order to make the operation of the main adsorption section 24 easier to understand.

In the moving path (hereinafter referred to as forward path) along which the main suction unit 24 moves downward, the book pick-up arm 22 and the swinging member 34 swing while maintaining a predetermined angular relationship, so that the book of the main suction unit 24 is moved downward. The relative positions on the pick arm 22 are fixed. That is, the main adsorption portion 24 moves along an arc L centered on the arm swing axis 20 . On the other hand, in the movement path (hereinafter referred to as the return path) where the main suction unit 24 moves upward and returns to the magazine 12, first, the swinging member 34 swings while the main pickup arm 22 is stationary. As a result, the main suction unit 24 retreats to a position where it does not interfere with the blank sheet B on the conveyer 10 (mark M). Next, the swinging member 34 and the main pick-up arm 22 move away from the arm swing shaft 20 while the main suction unit 24 moves upward (reference N). position (that is, the start position of the outward path).

By moving the main suction unit 24 along such a movement locus (L, M, N), the main pick-up arm 22 moves to the next position before the taken-out blank sheet B is conveyed by the conveyer 10. In order to take out the blank sheet B, the return movement can be started, so that the throughput of the take-out device can be improved.

Such a locus of movement is advantageous when employing a mechanism for changing the installation angle of the magazine 12 according to the type of blank sheet. That is, if the swinging distance of the take-out arm 22 is shortened, the throughput is improved, so it is desirable that the angle of the magazine 12 is as small as possible. However, in the case of a blank sheet with a large front side surface (the surface connected to the bottom flap P3 via the front fold line P1) and a top surface (the surface facing the bottom flap P3 after molding), the height of the blank sheet on the conveyer 10 is high. In order to avoid interference with blank sheets immediately after being taken out, the installation angle of the magazine 12 must be increased. As a result, the swinging distance of the main take-out arm 22 is increased, and the processing capacity is lowered. Therefore, in this case, by moving the main suction unit 24 along a movement locus in which the forward path and the return path are different as described above, it is possible to offset an increase in processing time due to an increase in the installation angle of the magazine 12. . Note that even when the installation angle of the magazine 12 is small, the movement trajectory described above may be adopted.

As a further modified example, the main suction portion 24 may be moved to the tip side of the main extraction arm 22 in the outward path. In this case, the take-out position of the blank sheet B on the transport conveyor 10 is determined downstream in the transport direction from the example of FIG. The return route is the same as the example in FIG.

A take-out device according to a second embodiment will be described with reference to FIGS.
Unlike the first embodiment, this embodiment is provided with four main adsorption portions 41 and 42 . While the first main suction portion 41 is fixed to the main removal arm 22 , the second main suction portion 42 is displaceable in the width direction of the main removal arm 22 . That is, the distance between the second main adsorption section 42 and the first main adsorption section 41 can be changed by the air cylinder 43, for example.

According to the second embodiment, the degree of freedom in selecting the suction position for the blank sheet B is increased, and the risk of damage to the blank sheet B can be reduced more than in the first embodiment.

The moving means is not limited to the structure in which each member swings as in the above-described embodiment, and may be a structure in which the members move linearly, such as a ball screw.

12 magazine 22 pick-up arm (arm member)
24 book adsorption part (adsorption means)
31 slider 34 rocking member (moving means)
35 connecting rod (moving means)
36 motor (moving means)
B blank sheet

Claims (2)

a magazine for holding a plurality of blank sheets in a stacked state;
an adsorption means for adsorbing and holding the blank sheet positioned at the bottom of the magazine;
an arm member for reciprocating the adsorption means between the magazine and a predetermined position;
a slider that supports the adsorption means and is movably provided along the arm member;
a moving means for moving the slider along the arm member;
The moving means includes a swinging member provided swingably around a rotating shaft;
a connecting rod connected to the oscillating end of the oscillating member and connected to the slider;
a motor for changing the rotation angle of the swinging member,
The moving means can arbitrarily change the position of the attracting means in the longitudinal direction of the arm member by changing the rotation angle of the rocking member to move the slider. take-out device. 3. The movement means changes the position of the adsorption means in the longitudinal direction of the arm member to a position that does not interfere with the taken-out blank sheet after the adsorption means descends to the predetermined position. 2. The blank sheet take-out device according to 1 .

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