JP2553382B2 - Box cutting device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a box cutting device that cuts a box body such as a corrugated box box accurately and surely, and particularly cuts an upper edge portion of the box body. The present invention relates to a box cutting device suitable for opening the top surface of a box.

(Prior Art) Japanese Patent Laid-Open Publication No.
Those described in 63-11297 and Japanese Utility Model Publication No. 52-27178 are known.

Explaining the conventional technique described in the above publication, JP-A-63-11297 discloses a conveyor that conveys a box body and an upper edge of the box body that is arranged above the conveyor or the vicinity thereof. There is described a box cutting device including a cutter that cuts along with conveyance of a conveyor.

Also, Japanese Utility Model Publication No. 52-27178 discloses a packing disassembling device in which a bottom cutter and an upper cutter for cutting the bottom and the top of both sides of a package are connected in series.

(Problems to be solved by the invention) However, the above-mentioned conventional technology has the following problems.

That is, the box cutting device described in Japanese Patent Laid-Open No. 63-11297 is not provided with a biasing member for biasing the cutter in the box direction, and if the supply of the box is interrupted, It is necessary to realign the cutter with the box supplied to the. Further, the packing disassembling apparatus described in Japanese Utility Model Publication No. 52-27178 cannot be cut accurately and surely if there is a variation in the size of each box.

Therefore, an object of the present invention is to provide a box body cutting device capable of accurately and surely cutting the box body by making the cutter move in the direction of the box body by the moving device via the biasing device. To do.

(Means for Solving the Problem) The configuration of the present invention that solves the above problem is achieved by pressing a cutter that is obliquely inclined with respect to the top surface of a box conveyed by a conveyor and the upper end side surface of the box while rolling. The moving pressure roller and the left and right vertical frame bodies are respectively supported, and one width stop of the left and right vertical frame bodies is movably supported on the horizontal rail. , The left and right pressing rollers are used to press the upper side surface of the box and the horizontal position of the cutter and the pressing roller is adjusted, and the box is moved to linearly cut the corners of the box. In the device, a vertical moving body is provided on each of the left and right vertical frame bodies so as to be vertically movable, and the vertical movement body supports the lifting frame so as to be vertically movable via compression springs. Firmly Then, a cutter is attached to the upper part of the lifting frame so that it can be adjusted up and down, and a nut member screwed to a drive screw shaft for moving the width-adjusting vertical frame body in the left-right direction and a plate fixed to the width-adjusting vertical frame body. Is connected via a horizontal compression spring, and further comprises stop means for stopping the rotation of the drive screw shaft and the vertical movement of the moving body by the set displacement of both compression springs. In the box cutting device, the pressing force of the pressing roller is regulated to adjust the cutting depth.

In addition, it is preferable to include a box body holding device that holds the box body from the left and right directions.

(Operation) In the present invention, when the drive screw shaft for moving the width-adjusting vertical frame body in the left-right direction is rotated, the nut member screwed with the drive screw shaft moves in the horizontal direction, and the width-adjusting vertical frame is inserted via the compression spring. The body also moves horizontally, and the left and right arrangement intervals of the cutter and the pressing roller attached to the stationary vertical frame body and the width-shifting vertical frame body via the vertical moving body and the elevating frame can be changed. By pulling one of the width-adjusting vertical frame members toward the stationary vertical frame member, the pressure rollers on the left and right sides approach the upper end side surface of the box body and press the upper end side surface thereof. When the width-adjusting vertical frame body is further drawn, the pressing roller presses the upper end side surface of the box body to deform / displace the position, and the horizontal compression spring contracts, and if the set displacement (spring force) is reached, the stopping means is stopped. Causes the rotation of the drive screw shaft to stop. The cutter moves deeper toward the inside of the box by the set displacement of this horizontal compression spring, the horizontal distance between the cutter and the upper edge corner of the box below the cutter changes, and the cutting depth in the horizontal direction is adjusted. The Rukoto.

Similarly, by moving the vertical moving body downward, the lifting frame and the pressing roller and cutter attached to it move downward, and the pressing roller presses down on the upper end of the box and lowers it while deforming and displacing this part. The stopping means works at a position where the vertical compression spring has a set displacement (spring force), the descent of the elevating frame is stopped, and the cutter deeply moves toward the inside of the box. The vertical cutting depth of the cutter can be adjusted by the set displacement (spring force) of the compression spring.

As described above, the cutting depths of the upper, lower, left, and right sides of the cutter are determined by the set displacement (spring force) of the compression spring starting from this corner with the corner of the box as a reference.

Therefore, according to the present invention, the cutting with a predetermined cutting depth is surely and accurately performed without being influenced by the absolute size of the box and the absolute position through which the box passes.

(Example) First, one example of a box cutting device of the present invention will be described below.

FIG. 1 is a front view showing an embodiment of the box cutting device of the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a plan view thereof.

In the figure, A is the box, B is the top of the box, C is the top of the box, and D is the box.
Is the side of the box. In addition, 1 is a conveyor for transporting the box A,
2 is a cutter using a rotary round blade, 3 is a vertical alignment vertical frame, 4
Is a stationary vertical frame body, 5 is a horizontal rail for horizontally moving the width-shifting vertical frame body 3 in the left-right direction, 6 is a pressing roller for pressing the upper end side surface of the box A fixed to the lower end of the elevating frame 8, and 7 is a width A vertical moving body mounted on the vertical vertical frame body 3 or the stationary vertical frame body 4 so as to be vertically movable, 8 is a vertical movement frame supported by the vertical vertical movement body so as to be vertically movable, and 9 is between the same vertical movement frame and each vertical movement body 7. A vertical compression spring interposed between the drive shaft, 10 a drive screw shaft for horizontally moving the width-shifting vertical frame body 3, 11 a nut member screwed to the drive screw shaft, and 12 fixed to the width-shifting vertical frame body 3. The plates 13 are compression springs PH5, PH6, which are interposed between the plate 12 and the nut member 11 to connect them.
Is the main configuration of the stop means, and detects the set expansion and contraction displacement (spring force) of the compression springs 9 and 13 to detect the motor 31 and 35.
Is a photo switch for stopping the operation, and the set displacement (set spring force) of the compression springs 9, 13 or the cutting depth is adjusted at the mounting position of the photo switch. Further, in the figure, reference numeral 21 is a mounting plate for the cutter 2, 22 is a side belt conveyor mounted on the vertical moving body 7 for holding the box A on the conveyor 1 so as not to become unstable, and 23 is for rotating the cutter 2. The motor mounted on the mounting plate 21, 24 is a linear bearing for moving the lifting frame 8 up and down, 25 is a vertical linear rail on which the linear bearing slides, and 26 is a mounting plate for the cutter 2.
Reference numeral 27 is a stepping motor for moving up and down, and 27 is a ball screw shaft rotated by the motor, which is screwed with a ball nut fixed to the mounting plate 21. 28 is a linear bearing mounted on the mounting plate 21, 29 is a bracket mounted on the upper part of the vertical moving body 7, 30 is a rod connecting the upper end of the compression spring 9 and the elevating frame 8 arranged in the bracket, 31 is a drive A width-adjusting motor that rotates the screw shaft 10, 32 is a timing belt that raises and lowers the vertical moving body 7, 33 is a pulley that drives the timing belt, 34 is a ball spline that horizontally rotates the pulley, and 34 is a ball spline that rotates the pulley. 35 is an elevating motor for rotating the ball spline, 36 is a linear bearing for horizontally sliding the width-adjusting vertical frame body 3, 38 is a width-adjusting bed, 39 is a portal frame, and 40 is a vertical moving body 7. Dog protruding upwards, 41 is a linear bearing for raising and lowering the side belt conveyor 22, 42 is a bracket of the stepping motor 26, 43 is a stopper provided on the conveyor 1, 44 is a nut member
The dog attached to 11, PH1 is a photo switch for detecting the arrival of the box A, PH2 is attached to the lower end of the vertical moving body 7, a photo for detecting the upper end of the box A, and controlling the lowering of the vertical moving body 7. Switches PH3 and PH4 are photoswitches for detecting the distance between the mounting plate 21 and the cutter 2 and the vertical and horizontal positions of the mounting plate.

Explaining each part in the above embodiment, FIG. 4 shows the cutter 2 for the upper end B, the top surface C and the side surface D of the box A.
This is a suitable example when the box A is a corrugated cardboard having a thickness of 2 mm to 8 mm, but is not limited thereto. That is, the cutter 2 is attached at an angle of 60 ° with respect to the top surface C of the box A, preferably 30 ° to 120 °.
It may be attached at an angle of 45 °, more preferably 45 ° to 75 °. The vertical cutting depth is 5m
Although an example of m ~ 15 mm is shown, preferably 2 mm ~ 30 mm,
It is more preferably 3 mm to 20 mm. Also, as the cutting depth in the left and right direction, an example of 4 mm is shown,
It is preferably 1 mm to 10 mm, more preferably 3 mm to 5 mm.

The vertical moving body 7 includes a stationary vertical frame body 4 and a width-shifting vertical frame body 3.
Timing belt along the linear rail 25 provided on the
The movement of 32 moves up and down. An inverter-shifted lifting motor 35 for driving the timing belt 32 and a ball spline 34 are attached.

When the vertical moving body 7 is moved up and down, the bracket 29 and the side belt conveyor 22 described later are moved in the vertical direction. The linear rail 25 has a linear bearing.
Not only the bracket 29 and the side belt conveyor 22 are slid through 41, but also the mounting plate 21 is mounted through the linear bearing 28, and the stepping motor 26 and the pressing roller 6 which will be described later are mounted through the linear bearing 24. The elevating frames 8 are slidable independently of each other, and have a triple slide structure.

Further, the cutting depth is adjusted by a lifting frame 8 vertically moved via a compression spring 9 described later, a stepping motor 26 attached to the lifting frame 8 via a bracket 42, and a ball driven by the stepping motor 26. It is made with screws 27, linear bearings 24, 41, etc. Two pressing rollers 6 as pressing members for pressing the top surface C of the box A are provided below the elevating frame 8 so as to sandwich the cutter 2 in the front and rear.
The ball screw 37 is rotated by 26, the mounting frame 21 is moved in the vertical direction, and the cutter 2 is positioned at a desired height.

Further, the lateral movement is performed by an inverter shifting gear shifting motor 31 that drives the width-adjusting bed 38 including the linear bearing 36, the horizontal rail 5 and the like, and the drive screw shaft 10 arranged in parallel to the width-adjusting bed 38. Etc. Rotation of the screw shaft of the drive screw shaft 10 causes the nut member 11 to move in the left-right direction, and the movement causes the width-shifting vertical frame body 3 to move.
Is moved in the left-right direction via a compression spring 13 described later. The other stationary vertical frame body 4 is directly attached to the gate-shaped base frame 39 and fixed in the left-right direction.

Further, the other compression spring 9 is always in a compressed state in balance with the weight of the elevating frame 8 and the like, and when the compression spring 9 extends, a part of the weight of the elevating frame 8 and the like is added to the box A, and the urging force is applied. It is set to occur.

Further, the conveyor 1 is a roller conveyer for transporting the box A, and includes a stopper 43 for stopping the box A.

The compression spring 13 is provided between the nut member 11 and the plate 12 attached to the width-shifting vertical frame body 3,
When the compression spring 13 contracts, a biasing force is generated.

Next, an embodiment of cutting the box by the box cutting device of the present invention will be described.

First, one or a plurality of boxes A for each product type are continuously or intermittently conveyed by the conveyor 1, and when a detector (not shown) detects that the leading box A has reached the stopper 43, the conveyor 1 After the cutter 2 is stopped and the cutter 2 is moved up and down and left and right according to the positions of the top surface C and the side surface D of the top box A, the cutter 2 is moved up and down according to the desired cutting depth, and then again. The conveyor 1 is operated so that the top edge B of the box A after the first and second boxes conveyed by the conveyor 1 are cut.

That is, in order to align the cutter 2 with the positions of the top surface C and the side surface D of the box A, the cutter 2 waiting above and outside the box A to be cut is moved by simultaneously moving vertically and horizontally. Is moved in the direction. That is, the lifting motor 35 is rotated at a high speed, the side belt conveyor 22 attached to the vertical moving body 7 is lowered at a high speed via the timing belt 32, and the cutter 2, the pressing roller 6 and the like are moved via the compression spring 9. It descends at high speed. Projection photo switch PH1 mounted on the side belt conveyor 22
When the box A is shielded from light by the box A, the lifting motor 35 is controlled, and the side belt conveyor 22, the cutter 2, the pressing roller 6
When the photo switch PH2 is shielded from light by the box A, the descent is temporarily stopped. At the same time, the width-shifting motor 31 is rotated at a high speed, and the nut member 11 is width-shifted at a high speed via the drive screw shaft 10, so that the width-shifting vertical frame body 3 is width-shifted via the compression spring 13. Cutter 2, side belt conveyor 22
Etc. are sorted at high speed. When the reflection type photo switch PH3 attached to each of the vertical frames 3 and 4 is shielded from light by the box A, the width-shifting motor 31 is switched to shift the one cutter 2, the side belt conveyor 22 and the like at a low speed. The
When the photo switch PH4 is shielded by the box A, the width adjustment is temporarily stopped. A reflective plate for the photo switches PH3 and PH4 is provided between the rollers of the conveyor 1.

When both the descending operation and the left-right movement width-shifting operation are temporarily stopped, that is, when one of the previously stopped states stands by and the other is temporarily stopped, the lowering operation and the left-right movement are performed. The width-shifting operation of is restarted.
The vertical movement is that the pressing roller 6 presses the top surface C of the box A via the compression spring 9 so that a predetermined biasing force is applied to the box A even if the pressing roller 6 stops descending.
That is, the lowering operation is continued until it is detected that the compression spring 9 has expanded by a predetermined amount. When the movement of the dog 40 is detected by the photo switch PH5, it means that a predetermined biasing force is applied to the box A, so the lowering operation is stopped and the vertical alignment is completed. Further, in the lateral movement, the side belt conveyor 22 presses the side surface D of the box A via the compression spring 13, so that a predetermined biasing force is applied to the box A even when the lateral belt conveyor 22 stops moving. That is, the width-shifting operation is continued until it is detected that the compression spring 13 contracts by a predetermined amount. When the movement of the dog 44 is detected by the photo switch PH6, it means that a predetermined biasing force is applied to the box A, so that the width-shifting operation is stopped and the left-right alignment is completed. In addition, when it is desired to adjust the urging force, the attachment positions of the dogs 40 and 44 or the photo switches PH5 and PH6 may be moved.

At the same time as the positioning process of moving the cutter 2 according to the positions of the top surface C and the side surface D of the box A is performed, the cutter 2 is moved vertically according to the desired cutting depth by adjusting the cutting depth. It That is, the cutting depth at the time of cutting is set in advance by the shape and size of the upper end B of the box A to be cut, as shown in FIG. 4, for example.
The cutter 2 is moved in the vertical direction based on the stepping value of the stepping motor 26 corresponding to the set value. The relationship between the stepping value and the movement amount of the cutter 2 can be set as appropriate, but may be, for example, 0.1 mm / pulse, preferably 0.02 mm / pulse.

At this time, if either of the two upper ends B is not cut, the cutter 2 on the upper end B side that is not cut may be raised to the upper position, that is, the position that is not cut. As described above, since the stepping motors 26 can operate independently of each other, the upper edge B of the box A can be cut at the same time, or only one of them can be cut. Therefore, by using two cutting devices, a box cutting device that cuts the upper edge B of the box A in the longitudinal direction and a box cutting device that cuts in the width direction, the four upper ends B of the box A are It is possible to cut all, but if necessary, cut only one upper end B or 2
Cut the upper end B of each piece into a V shape, or the upper end B of three pieces
Can be cut into a U-shape. Also, the respective cutting depths can be set to different values.

As described above, when the cutter 2 is located on the extension line of the upper end B of the box A, the stopper 43 descends, and the conveyor 1 and the side belt conveyor 22 are operated, and the leading and 2
The box A after the th is moved in the arrow direction, and the upper end B of the box A is cut. Although the second and subsequent boxes A are not aligned with each other, since the pressing roller 6 and the side belt conveyor 22 are urged in the box A direction by the compression springs 9 and 13, the individual boxes A are Even if there is a slight difference in size due to deformation or the like, the cutter 2 follows the size of each box A.

Further, when different types of boxes A are conveyed by the conveyor 1, the cutter 2 returns to the standby position, the cutter 2 is automatically aligned in the same manner as described above, and the desired cutting depth is obtained. After being moved accordingly,
Box A is cut.

Although the embodiment of the box cutting device of the present invention and the embodiment of the box cutting by the box cutting device of the present invention have been described above, the present invention is not limited to these. For example,
The box A in the stopped state may be cut off.

Further, instead of detecting the deflection of the compression springs 9 and 13 and performing the alignment, the vertical movement device and / or the horizontal movement device is moved to a desired position without being temporarily stopped, and then is adjusted by stopping. Good. In this case, the compression spring is adjusted to be bent when stopped.

Further, as the pressing roller 6, instead of the flanged roller,
A collarless roller, a large number of caterpillar rollers, and a sled-shaped sliding body having good sliding property may be used.

Further, the side belt conveyor 22 may not be provided.

(Effect of the Invention) As described above, in the box cutting device of the present invention, since the cutter is moved in the box direction by the moving device via the spring, the upper edge portion of the box can be accurately moved. It can be cut reliably.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing an embodiment of a box body cutting device of the present invention, FIG. 2 is a side view thereof, FIG. 3 is a plan view thereof, and FIG. 4 is a cutter thereof. FIG. 3 is an explanatory diagram of a positional relationship between the box and the box. A: Box, B: Upper end C: Top surface, D: Side PH1 to 6: Photo switch 1: Conveyor, 2: Cutter 3: Aligning vertical frame body, 4: Standing vertical frame body 5: Horizontal rail, 6: Pressing Roller 7: Vertical moving body, 8: Lifting frame 9: Compression spring, 10: Drive screw shaft 11: Nut member, 12: Plate 13: Compression spring

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-63-11297 (JP, A) JP-A-62-271828 (JP, A) JP-A-58-4394 (JP, A) Actual development Sho-61- 102413 (JP, U)

Claims (1)

(57) [Claims] 1. A left and right vertical frame body is provided with a cutter inclined obliquely with respect to a top surface of a box conveyed by a conveyor and a pressing roller which rolls while pressing an upper end side surface of the box. , One of the left and right vertical frame bodies is movably supported on a horizontal rail, and the left and right pressing rollers press the upper end side surface of the box body by moving the widthwise vertical frame body in the left-right direction. In the cutting box cutting device that adjusts the left and right positions of the cutter and the pressing roller and linearly cuts the corners of the box by moving the box, a vertical moving body is provided on each of the left and right vertical frame bodies. It can be lifted up and down, the lift frame is supported by the vertical moving body so that it can be lifted up and down via a compression spring, the pressing roller on the upper end side is fixed to the lower part of the lift frame, and the cutter can be adjusted up and down on the upper part of the lift frame. Nitori A nut member screwed onto a drive screw shaft for moving the width-shifting vertical frame body in the left-right direction and a plate fixed to the width-shifting vertical frame body are connected via a horizontal compression spring. Equipped with a stop mechanism that stops the rotation of the drive screw shaft and the vertical movement of the moving body by the set displacement of the compression spring.By setting the spring force of both compression springs, the pressing force of the pressure roller is regulated and the cutting depth is set. A box cutting device that is adjusted.