JP3026762B2 - Box cutting device - 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 cutting device suitable for cutting a top surface or a side surface of a box such as a cardboard box in order to take out an article in the box with a distribution apparatus or the like.

[0002]

2. Description of the Related Art Hitherto, in a physical distribution device, a box cutting device for opening a box in a process of transporting a box such as a cardboard box discharged from a warehouse to a fluidized shelf or the like has been used. A conventional box cutting device cuts a box by adjusting a blade to a standard box cut level corresponding to a constant box height determined for each type of box, and moving the blade along a box cut surface. I have to do that.

[0003]

However, the prior art has the following problems. To open the box, all sides on the top of the box, for example, 4
In order to cut the sides, it is necessary to arrange the box cutting devices at each of the four positions along the transport path of the box, so that the equipment must be large-scale.

[0004] From the master CPU to the cutting device, cut data of the box to be cut (box height, box cut surface thickness (cut depth of box cut surface), box guide surface thickness (interval from box guide surface to cut position) Therefore, it is necessary to register the cut data for all types of cut target boxes.

[0005] In a box such as a corrugated cardboard box, the box cut level does not always become the standard box cut level due to box manufacturing errors, deformation in the transport process, etc., even if they are of the same type. For this reason, a box having a box cut level lower than the standard box cut level cannot be cut because the blade does not touch the box cut surface or the box cut surface thickness cannot be sufficiently cut.

An object of the present invention is to provide a manufacturing error of a box and a transportation process.
The box cut level is changed to the standard box cut level
Even for lower boxes, the box is completely cut so that it can be opened.

[0007]

According to a first aspect of the present invention, there is provided a box cutting apparatus for cutting a box with a blade.
A gantry that supports the box, an elevating platform that can move up and down with respect to the gantry,
A lifting drive for raising and lowering the lifting platform, and supported by the lifting platform,
And a tool rest that can be displaced up and down with respect to the elevating platform, a copying tool supported by the tool rest, and following the cut surface of the box, a cutting edge cutting positioning device that adjusts the amount of protrusion of the cutting edge from the copying tool, and a box height It has a box height measuring device to measure and a cut surface thickness setting device to set the cut surface thickness of the box, and based on the setting result of the cut surface thickness setting device, controls the cutting edge cut positioning device to control the cutting edge from the copying tool. thereby enabling adjusting the projecting amount of the cutting edge, on the basis of the measurement result of the box height gauge, and controls the lift drive unit, to be set to a lower than the cut surface of the box initialization height position of the scanning device With the tool post as a swing link
The copying tool is supported by the lifting platform, and the copying tool contacts the cut surface of the box.
The tool post supporting the copying tool
The vertical displacement of the rack supporting the box
Then, the copying tool is made to follow the cut surface of the box .

[0008]

[0009] The present invention described in claim 2, serial to claim 1
In the present invention described above , further, a projection guide that is supported by the elevator and contacts a guide surface that intersects the cut surface of the box, a projection guide positioning device that adjusts the projection amount of the cutting edge with respect to the projection guide, and a box. A guide surface thickness setting device for setting the guide surface thickness of the, based on the setting result of the guide surface thickness setting device,
The projection guide positioning device is controlled so that the projection amount of the cutting edge with respect to the projection guide can be adjusted.

According to the present invention, the following effects are obtained. One box cutting device is used to repeat the operation of manually positioning one side of the top surface of the box at the cutting work position of the blade with respect to all sides of the top surface of the box, thereby cutting one side of the box. All sides of the box can be cut and opened by the box cutting device.

The box height is measured by a box height measuring device, the box cut surface thickness is set using a cut surface thickness setting device, and the box guide surface thickness is set using a guide surface thickness setting device. As a result, all the cut data of the box to be cut is procured inside the cutting apparatus, and a simple independent box cutting facility that does not need to provide information from the master CPU can be constructed.

When the box is moved relative to the cutting work area by the box cutting device, the tool rest is displaced such that the copying tool supported by the tool rest always follows the cut surface of the box. Then, the tool of the tool rest cuts the box with the blade tip protruding from the copying tool. Therefore, even when the box height (box cut level) is different due to box manufacturing error, deformation, etc., the copying tool is made to follow the cut surface of those boxes, and the cutting edge of the tool is adjusted to the predetermined cutting depth of the box. So as to enter
The box shall be completely cut.

[0013] The tool rest can be vertically displaced with respect to the lifting platform, and the lifting platform can be raised and lowered with respect to the gantry. Therefore, by setting the lifting position of the lifting platform so that the copying tool supported by the tool post is positioned, for example, about 5 mm lower than the passage level (box cutting level) of the box cutting surface, the copying tool must be placed on the box. It can follow the cut surface. When the copying tool follows the box cut surface, the tool rest is displaced upward with respect to the lifting platform.

By adjusting the amount of protrusion of the cutting edge from the copying tool based on the box cut surface thickness, the cutting edge positioning device can always position the cutting edge at a predetermined cutting depth of the box.

[0015] The extra guide supported by the elevator is in contact with the guide surface intersecting the cut surface of the box.
The cutting edge of the blade can be positioned at a predetermined position inside the box from the box guide surface (side wall).

By cutting the box by setting the amount of protrusion of the blade edge with respect to the protrusion guide to the box guide surface thickness and the amount of protrusion of the blade edge from the copying tool to the box cut surface thickness, the cut surface of the box and the guide surface are separated. Cutting can be performed at the position along the inner surface of the guide surface in the intersecting ridge. Thereby, an opening at the maximum interval in the box can be formed in the cut surface of the box from the inner surface of one of the opposing guide surfaces to the inner surface of the other guide surface.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic diagram showing a top cut line of a box, FIG. 2 is a front view showing a box cutting device, FIG. 3 is a side view showing a box cutting device, and FIG. FIG. 5 is a schematic view showing a setting state of the copying plate, FIG. 5 is a schematic view showing a box entering state in the box cutting apparatus, FIG. 6 is a schematic view showing a top cut state of the box in the box cutting apparatus, and FIG. 7 is a side view of FIG. FIG. 8 is a schematic diagram showing a box cut state.

(Box Top Surface Cut Line) (FIG. 1) The box top surface cut line 10 is, as shown in FIG.
The box 1 taken out of the fluidized shelf 11 by the case picking device 13 is carried in between the cabinet 1 and the horizontal rotating shelf 12. Each box 1 is provided with one box cutting device 2 constituting the box cutting equipment 14 in the process of transporting the box top surface cutting line 10.
After the four sides of the top surface are sequentially cut by 0, the top surface is supplied to the horizontal rotating shelf 12.

(Box Cutting Apparatus 20) (FIGS. 2 and 3) The box cutting apparatus 20 has an elevating table 22 which can move up and down with respect to the gantry 21. The elevating table 22 can be moved up and down along a guide 23 provided on the gantry 21.
4 is moved up and down by a toothed belt 26 meshed with a toothed pulley 25 of a lifting drive. The free end of the toothed belt 26 is connected to a lifting counterweight 27 that balances the lifting weight.

The box cutting device 20 has a tool rest 31 which is supported by the lift 22 and can be vertically displaced with respect to the lift 22. The tool post 31 includes an electric tool 32 driven by a motor. Further, the box cutting device 20 has a ski-shaped copying plate 33 (copying tool) that is supported by the tool rest 31 and follows the cut surface (top surface) 1A of the box 1. Specifically, the tool rest 31 has the left and right arms 34A, 34B supported by pins on the lifting platform 22 by swing links 35A, 35B to form a four-link mechanism, and the swing links 35A, 35B based on the action of gravity are provided. By the swing displacement, the copying plate 33 can be vertically displaced while being kept in a substantially horizontal posture. The tool post 31 can be vertically moved up to about 10 mm, for example, and the copying plate 33 can be moved by, for example, 5 mm from the cut level of the box 1 (the top level of the box 1).
It is used in a low position. Then, when the copying plate 33 of the tool rest 31 comes into contact with the cut surface 1A of the box 1 that moves relatively, the tool rest 31 moves the swing links 35A, 35B.
Due to the swing displacement, the copying plate 33 is vertically displaced while keeping the copying plate 33 in a substantially horizontal posture, so that the copying plate 33 follows the cut surface 1A of the box 1. The tool rest 31 abuts against a stopper 28 provided on the lift 22 and is stopped at the swinging lower end.

A swing counterweight 62 that balances the swing weight is connected to the tool rest 31 via a suspension wire 61. 63 is a pulley. The tool rest 31 has a dust cover 64 around the tool 32.

In the box cutting device 20, a pulse motor 36 (a cutting edge positioning device) for positioning the cutting edge is provided on the tool post 31, and a bending link 37 is provided on the tool post 31.
A, the copying plate mounting link 38 is connected via the short link 37B, and the link 37A can be driven by the motor 36. The copying plate mounting link 38 has a cushion member 39A on the front end side and a fixed portion 39B on the rear end side,
The above-mentioned copying plate 33 is attached. In other words, the link 3 is driven by the driving of the pulse motor 36 for positioning the cutting edge.
8 and the copying plate 33 are kept in a substantially horizontal posture,
1. The copying plate 3 of the cutting edge 32A of the blade 32
The protrusion amount (cutting depth) from 3 is adjustable.

The box cutting device 11 is provided with a pulse guide 41 (position guide guide positioning device) for positioning a guide on the elevating table 22, and the motor 41 has a long L-shaped link 42A and a short L
Free roller guide 4 through die link 42B
3 and the link 42A and the link 42B are connected by the connecting link 44. New generation guide 43
Is the cut surface 1 of the box 1 conveyed on the conveyor 10A
Abuts on a guide surface (side surface) 1B orthogonal to A, and the cutting edge 32A of the cutting tool 32 determines the amount of margin for the guide surface 1B. That is, by driving the pulse guide motor 41 for positioning guide, the guide 43 moves back and forth toward the conveyor 10A while maintaining a substantially straight posture along the transport direction, and the guide 43 for guide.
The amount of protrusion of the cutting edge 32A with respect to is adjustable. In the conveyor 10A, the conveyor rollers are skewed in the transport direction so as to press the box 1 against the transfer guide 43 at a box cutting operation position by the box cutting device 11.

However, in the box cutting device 20, as shown in FIGS. 2 and 3, a cut surface thickness setting device 101, a guide surface thickness setting device 102, a start switch 103, and a box height measurement are provided on an operation panel 100. It has a vessel 104.

The cut surface thickness setting device 101 sets the cut surface thickness (t _{1 in} FIG. 8) based on the judgment of a person based on the appearance of the box 1 being carried into the box cutting device 20.

The guide surface thickness setting device 102 sets the guide surface thickness (t _{2 in} FIG. 8) based on the judgment of a person based on the appearance of the box 1 being carried into the box cutting device 20.

Each of the cut surface thickness setting device 101 and the guide surface thickness setting device 102 is of a selection type that can be easily set by a person, and is thin (about 3 mm), normal (about 5 mm), and thick (8 mm).
Degree) can be selected. However, the cut surface thickness setting device 101 and the guide surface thickness setting device 102 may be capable of setting numerical values in mm or the like by key input.

The box height measuring device 104 is constituted by an ultrasonic distance measuring sensor or the like, and starts operating when the start switch 103 is turned on, and measures the distance H ₁ to the top surface of the box 1. In the control unit of the box cutting device 20 subtracts the H ₁ from the distance H ₀ of the box height gauge 104 to the conveyor surface of the line 10, we obtain the height H of the box 1. The box height measuring device 104
Does not start when the start switch 103 is turned on, and the box detection photoswitch provided below the box height measuring device 104 is shielded from light by the entry of the box 1
The operation may be started when N is performed.
The box height measuring device 104 is not limited to an ultrasonic sensor,
Box 1 using the string with weight unwound from the encoder
Also well it intended to measure the distance H ₁ to the top surface of, or may be a laser distance sensor or the like.

The box cutting operation by the box cutting device 20 is performed as follows (FIGS. 4 to 8). (1) The box 1 carried into the box top surface cut line 10 by the case picking device 13 is manually stopped at a position upstream of the box cutting device 20, and the cut surface thickness is set by the judgment of a person based on the appearance of the box 1 and the like. Device 101, guide surface thickness setting device 10
2, the cut surface thickness and the guide surface thickness of the box 1 are set.

When the start switch 103 is turned on, the operation of the box height measuring device 104 is started, and the height H of the box 1 is obtained.

(2) On the basis of the setting result (cut surface thickness t ₁ ) of the cut surface thickness setting device 101, the pulse motor 36 for positioning the cutting edge is controlled to control the cutting edge 32A from the copying plate 33.
Adjust the protrusion amount (cutting depth) d.

Further, based on the measurement result of the box height measuring device 104, the elevator servomotor 24 is controlled to set the initial height position of the copying plate 33 lower than the cut surface 1A of the box 1 (for example, from the cut surface 1A). 5mm lower).

Further, based on the setting result of the guide surface thickness setting device 102 (guide surface thickness t ₂ ), the pulse guide motor 41 for positioning the extra guide is controlled to adjust the extra width W of the cutting edge 32A with respect to the extra guide 43. I do.

(3) After the cutting edge 32A of the cutting tool 32 is positioned according to the above (2), the box 1 is manually moved to the delivery guide 43.
And cut one side of the top surface of the box 1. Subsequently, after the box 1 is manually unfolded by 90 degrees, the box 1 is moved again along the extra guide 43 and another side of the top surface of the box 1 is cut. By repeating this for all four sides on the top surface of the box 1, the cutting of the box 1 is completed.

When the box 1 is moved into the cutting work area by the box cutting device 20 to enter, the tool post 3
1 absorbs the impact caused by the entry of the box 1 by the flexibility of the copying plate 33 and the cushioning property of the cushion member 39A.
Gradually moves so as to follow the cut surface 1A of the box 1.
Thereby, the tool rest 31 is displaced upward while moving with respect to the elevating platform 22, and the copying plate 33 follows the cut surface 1A of the box 1 (FIG. 5).

When the copying plate 33 follows the cut surface 1A of the box 1 and the box 1 reaches a position corresponding to the center of the blade 32,
The box 1 is cut by the cutting edge 32A protruding from the copying plate 33 (FIG. 6).

The protrusion amount w of the cutting edge 32A is equal to the box guide surface thickness t _2.
And the cutting depth d of the cutting edge 32A is set to the box cut surface thickness t.
_Since it is set to ₁ , the cutting edge 32A is the cut surface 1A of the box 1.
A position along the inner surface of the guide surface 1B is cut within the ridge where the (top surface) and the guide surface 1B (side surface) intersect (FIG. 8). If there is a gap between the guide surface 1B of the box 1 and the stored articles, the margin w of the cutting edge 32A may be made larger.

Here, as shown in FIG. 7 (B), the copying plate 33 has a blade insertion slot 71, and the leading end and the rear end of the slot 71 are formed as joints 72A and 72B without holes. I have.
For this reason, when the copying plate 33 is placed on the cut surface 1A along the ridge of the box 1 and slidably contacts the cutting edge 32 of the box 1, the joints 72A and 72B of the copying plate 33 As a result of being supported by the guide surface 1B (side wall), the copying plate 33 does not sink into the box along with the cut surface 1A, and the entire length of the box 1 can be stably cut. If the copying plate 33 does not include the joints 72A and 72B, the copying plate 33 sinks into the box together with the cut surface 1A cut by the gravitational action of the tool rest 31, thereby impairing the progress of the cutting operation.

Hereinafter, the operation of the present embodiment will be described. Using one box cutting device 20, the operation of manually positioning one side of the top surface of the box 1 at the cutting operation position of the blade 32 by hand is repeated for all sides of the top surface of the box 1. With one box cutting device 20, all sides of the box 1 can be cut and opened.

The box height is measured by a box height measuring device 104,
The box cut surface thickness is set using a cut surface thickness setting device 101, and the box guide surface thickness is set using a guide surface thickness setting device 102. As a result, all the cut data of the box to be cut is procured in the machine of the cutting device 20, and a simple independent box cutting facility that does not need to provide information from the master CPU can be constructed.

When the box 1 is moved with respect to the cutting work area by the box cutting device 20, the copying plate 33 supported by the tool rest 31 always follows the cut surface 1 A of the box 1.
The tool post 31 is vertically displaced with respect to the lift table 22. And
The tool 32 of the tool rest 31 cuts the box 1 with a cutting edge projecting from the copying plate 33. Therefore, box 1
Box height (box cut level) due to manufacturing error, deformation, etc.
Are different from each other, the copying plate 33 is made to follow the cut surface 1A of the box 1 so that the cutting edge of the cutting tool 32 enters the predetermined cutting depth of the box 1 so that the box 1 can be completely cut. I do.

The tool rest 31 can be vertically displaced with respect to the lift 22, and the lift 22 can be moved up and down with respect to the gantry 21. Therefore, the copying plate 3 supported by the tool post 31
3 is positioned lower than the passage level of the box cut surface 1A (box cut level) by, for example, about 5 mm.
The copying plate 33 can always be made to follow the cut surface 1A of the box 1 by setting the vertical position of the box. When the copying plate 33 follows the box cut surface 1 </ b> A, the tool rest 31 is displaced upward with respect to the lifting platform 22.

Pulse motor 36 for cutting edge positioning
However, by adjusting the amount of protrusion of the cutting edge from the copying plate 33 based on the thickness of the box cut surface 1 </ b> A, the cutting edge can be always positioned at a predetermined cutting depth of the box 1.

A delivery guide 43 supported by the lift 22
However, since it comes into contact with the guide surface 1B intersecting the cut surface 1A of the box, the cutting edge of the blade 32 can be positioned at a predetermined position inside the box from the box guide surface 1B (side wall).

By cutting the box 1 with the amount of protrusion of the blade edge relative to the protrusion guide 43 as the box guide surface thickness and the amount of protrusion of the blade edge from the copying plate 33 as the box cut surface thickness, the cut surface 1A of the box 1 is cut. Can be cut at a position along the inner surface of the guide surface 1B in the ridge where the guide surface 1B intersects with the guide surface 1B. Thereby, an opening at the maximum interval in the box extending from the inner surface of the opposing one guide surface 1B to the inner surface of the other guide surface 1B can be formed on the cut surface 1A of the box 1.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration of the present invention is not limited to the embodiments, and the design can be changed within a range not departing from the gist of the present invention. The present invention is also included in the present invention.

[0047]

As described above, according to the present invention, a box such as a cardboard box can be completely cut by an independent box cutting facility which does not require master information or the like using one box cutting device. Can be opened.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a top surface cut line of a box.

FIG. 2 is a front view showing a box cutting device.

FIG. 3 is a side view showing a box cutting device.

FIG. 4 is a schematic diagram showing a setting state of a copying plate in the box cutting device.

FIG. 5 is a schematic view showing a box entering state in the box cutting device.

FIG. 6 is a schematic diagram showing a state in which the box is cut off from the top surface in the box cutting device.

FIG. 7 is a side view of FIG. 6;

FIG. 8 is a schematic diagram showing a box cut state.

[Explanation of symbols]

Reference Signs List 1 box 1A cutting surface 1B guide surface 20 box cutting device 21 gantry 22 elevating table 24 elevating operation servomotor (elevating driving device) 31 blades 32 blades 32 32A blade edge 33 copying plate (copying tool) 35A, 35B swing link 36 Pulse motor for blade edge cut positioning (blade edge cut positioning device) 41 Pulse motor for edge guide positioning (edge guide positioning device) 43 Edge guide 101 Cut surface thickness setting device 102 Guide surface thickness setting device 104 Box height measuring device

Claims (2)

(57) [Claims] 1. A box cutting device for cutting a box with a knife, a gantry supporting the box, an elevating platform capable of moving up and down with respect to the gantry, an elevating drive device for elevating the elevating platform, A turret that can be displaced up and down with respect to the pedestal, a copying tool that is supported by the turret, and follows the cut surface of the box; It has a box height measuring device and a cut surface thickness setting device that sets the cut surface thickness of the box. Based on the setting result of the cut surface thickness setting device, it controls the cutting edge cut positioning device to control the cutting edge from the copying tool. In addition to being able to adjust the amount of protrusion, based on the measurement result of the box height measuring device, the elevation drive device is controlled so that the initial setting height position of the copying tool can be set lower than the cut surface of the box , The tool post is pivoted Is supported by the lifting platform, the
When the copying tool touches the cut surface of the box, support the copying tool
The tool post is supported by the swing displacement of the swing link.
The copying tool is vertically displaced with respect to the
A box cutting device characterized by following the surface. 2. The box is supported by the lifting platform and contacts the cut surface of the box.
Extra guide that comes in contact with the guide surface to be inserted, and extra guide that adjusts the extra amount of the cutting edge with respect to the extra guide.
A positioning device, and a guide surface thickness setter for setting the guide surface thickness of the box, based on the setting result of the guide surface thickness setter Projection guide position
Control the setting device to determine the amount of cutting edge
The box cutting device according to claim 1, wherein the box cutting device is adjustable.