JPH0427092B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a device for cutting a bundle of articles, for example, a device for cutting a cylindrical film to a predetermined length and sealing the cut portion. A packaging machine for fruits and vegetables, etc., which expands the opening of the packaging bag, inserts the contents therein, ties the opening, and discharges the packaging bag (for example, Japanese Patent Laid-Open No. 59-174413 (see Japanese Patent Publication No. 2003-110003) relates to a device for cutting the bag opening after bundling.

(Problems to be solved by the prior art and the invention) Conventionally, in this type of bagging and packaging machine,
As described in Japanese Patent No. 59-163109, after binding, the grip by the clamp member is released, and the packaging bag falls and is discharged.

However, at the bag opening, an ear remains above the bundled portion, and if this ear becomes too large, a device is required to efficiently and reliably cut this ear after binding and before discharging. .

In addition to such bag filling and packaging machines, various packaging machines and other machines that require bundling and cutting require devices that efficiently and reliably cut the bound portions of articles.

Structure of the Invention (Means for Solving Problems) The present application has been made in order to solve the problems of the conventional device described above. First, in the first invention, a guide path for transferring the packaging bag while giving a twist to the opening of the packaging bag; and a binding that is continuous with the guide path in a straight line and for binding the twisted opening of the packaging bag with tape. a passage; a cutting passage that continues in an arc shape with respect to the bundling passage and is used to cut the tied mouth; and a circular cutter that is rotatably provided so as to block the cutting passage with a part of the cutting edge on the outer periphery. It adopts a structure consisting of a cutter.

A second invention also provides a guide passage which is constituted by a guide member and a feeding member and is configured to transfer the packaging bag while imparting a twist to the opening of the packaging bag; a binding passage for binding the openings of the wrapped packaging bags with tape; a cutting passage continuous in an arc shape with the binding passage for cutting the tied openings; and a part of the cutting edge on the outer periphery, A structure including an auxiliary cutter rotatably provided so as to block the cutting path is adopted.

(Function) By employing the above configuration, in the first invention of the present application, the mouth part (hereinafter referred to as the binding part) is twisted and transferred through the guide passage, and then guided to the binding passage following the guide passage, and the opening part (hereinafter referred to as the binding part) is transferred through the guide passage. In the above step, the twisted binding portion is bound with tape.
This packaging bag (hereinafter referred to as the article) is transferred to a cutting path and pressed against the cutting edge of a rotating circular cutter, and the excess portion of the opening is cut off and removed.

Further, in the second invention, in addition to the above, two cutters, a circular cutter and an auxiliary cutter, allow smoother cutting and removal.

(Example) Hereinafter, an example in which the present invention is applied to binding and cutting the bag opening of a bag filling and packaging machine will be described with reference to the drawings.

As shown in FIG. 1, a clamp member 1 is supported between a pair of parallel main chains 2, and a second
As shown in the figure, it moves in the direction of arrow A on the conveyance device 11 and reaches above the binding and cutting device 20. In this clamp member 1, as shown in FIG. 3, a pair of fixed clamping plates 3 are installed facing each other.
A support shaft 4 supported on the upper surface of both fixed clamping plates 3 has a
Each pair of movable clamping plates 5 formed in a fork shape are supported so as to be rotatable and movable in the axial direction. The clamping arm 6 of each movable clamping plate 5 extending downward from the inside of the support shaft 4 is adapted to come into contact with the clamping surface 3a on the inside of the fixed clamping plate 3. or,
A cam roller 8 is supported by a slide shaft 9 on a movable arm 7 of each movable clamp plate 5 extending from the support shaft 4 to the outside of the fixed clamp plate 3, and the movable arm 7 of the movable clamp plate 5 moves along the support shaft 4. At this time, the cam roller 8 also moves along the slide shaft 9 together with the movable arm 7. Both ends of this slide shaft 9 are biased in the direction of arrow B by a spring 10, and the clamping arm 6 of the movable clamping plate 5 and the clamping surface 3 of the fixed clamping plate 3
a and are always closed. and,
The fixed clamping plate 3 and the movable clamping plate 5 constitute a gripping section. As shown in FIGS. 1 and 3, the article 61 containing the contents has its mouth end facing the movable clamping plate 5.
The fixed clamping plate 3 is suspended between the clamping arm 6 of the fixed clamping plate 3 and the clamping surface 3a of the fixed clamping plate 3.

In the conveying device 11, as shown in FIG.
2 is arranged and the storage part 6 for the suspended article 61
It is designed so that it can come into contact with one side of 1a. The main rotating belt 12 rotates in the same direction as the moving direction A of the clamp member 1 with its torsion member 12a in contact with the article 61, and its rotational speed is slower than the moving speed of the clamp member 1. Further, an auxiliary rotating belt 13 is disposed opposite to the main rotating belt 12, and rotates in the opposite direction to the main rotating belt 12 to guide the suspended article 61 between it and the main rotating belt 12. do.

A guide rod 14 as a pair of upper and lower guide members is disposed on the upper inner side of the main rotating belt 12, and an endless feeding chain 15 as a feeding member is provided above the auxiliary rotating belt 13. A guide passage 16 is formed between the guide rod 14 and the feed chain 15. Both guide rods 14 reach the binding cutting device 20, and the lower guide rod 14 reaches the device 2.
It slopes downward as it approaches 0.

A plurality of first feed claws 1 are provided in the feed chain 15.
7 are attached at equal intervals so that when the binding part 62 of the suspended article 61 moves through the guide passage 16, it pushes the binding part 62 in the moving direction A. A second feed pawl 19 is supported on the lower surface of the sprocket 18 adjacent to the bundle cutting device 20 among the sprockets on which the feed chain 15 is stretched, so as to maintain a constant distance from the lower surface. It is designed to protrude slightly outward from the outer periphery of. When the sprocket 18 rotates with the rotation of the feed chain 15, each first sprocket of the feed chain 15 rotates.
Feed pawl 17 and second feed pawl 19 of sprocket 18
The leading end portions 19a of the feed chain 15 move within the winding angle range of the sprocket 18 of the feed chain 15 while facing each other at a constant interval in the vertical direction.

A binding passage 21 linearly continuous with the guide passage 16 of the conveying device 11 is formed in the binding cutting device 20, and the first feeding claw 17 and the second feeding claw 19 are separated from each other at the entrance 21a of the binding passage 21. They are now approaching each other and facing each other. As for the pasting mechanism of the bundle cutting device 20, as shown in FIG. On the other side edge of the binding passage 21, a holding member 25 is rotatably attached to a shaft 27, which is pressed against the outer periphery of the rotating member 22 by the force of a spring 26. The tip end 28a of the tape 28 installed in the binding cutting device 20 is set so as to be held between the rotating member 22 and the pressing member 25. Further, a cutter 30 and an engaging protrusion 31 are provided on one edge of the further back side of the binding passage 21.
A bifurcated cutting member 29 having a
The cutter 30 is retracted from the binding passage 21 by the bias of the spring 33, and the engaging protrusion 31 blocks the binding passage 21.

A discharge port 3 is provided at the end 21b of the binding passage 21 located below the engaging protrusion 31 of the cutting member 29.
4 are continuously formed, and above the discharge port 34, an arc-shaped cutting passage 35 is formed continuously from the end 21b so as to deviate to one side from the moving direction A of the binding part 62. A rotatable circular cutter 36 is supported on one side of the cutting passage 35 (near the extension line of the binding passage 21), and a cutting edge 36a on the outer periphery of the cutter 36 is supported.
A part of the cutting passage 35 is embedded below one side edge 35a of the cutting passage 35, blocking the cutting passage 35. This circular cutter 36 is driven via a belt 37 and a pulley 38 as shown in FIG.

As shown in FIG. 3, above between both main chains 2, a guide plate 39 rotatably supported by a support shaft 40 is provided extending in the moving direction A of the clamp member 1. A bracket 41 fixed to the upper surface of the proximal end of the bracket 39 and the drive shaft 4 above the bracket 41
A connecting rod 44 is rotatably attached to shafts 45 and 46 between the distal end of a rotary arm 43 fixed to the rotary arm 2 . Then, when the rotating arm 43 rotates with the rotation of the drive shaft 42, the guide plate 39 moves toward the support shaft 40.
It is designed to be tilted via a connecting rod 44 between the highest position shown in FIG. 3 and the lowest position shown in FIG. The guide plate 39 at the highest position is inclined upward in the moving direction A of the clamp member 1, and the guide plate 39 at the lowest position is substantially horizontal.

As shown in FIG. 3, a presser member 47 is movably supported on the guide plate 39.
7 is a roller 48a that rolls along the guide plate 39;
The vehicle chassis 48 is comprised of a chassis 48 having a diameter of 1.5 mm, and a pair of presser plates 49 attached to the lower part of the chassis 48, and the presser plates 49 are arranged such that the distance between them increases as they move downward. Further, a stopper 50 is fixed to the base end side of the guide plate 39 so that its position can be adjusted.
As shown in FIG. 3, when the guide plate 39 is at the highest position, the chassis 48 of the presser member 47 comes into contact with the stopper 50 and is prevented from moving further towards the base end of the guide plate 39.

As shown in FIG.
An air blowing pipe 5 is attached to the presser plate 49 on one side of the air blowing pipe 5.
1 is attached and its outlet 51a is connected to both presser plates 49.
An air supply hose 52 is connected to the air blowing pipe 51. Air is discharged from the air outlet 51a of the air blowing pipe 51 to the clamp member 1.
The water is ejected diagonally downward toward the space between the two fixed clamping plates 3.

As shown in FIG. 2, a discharge pipe 53 is disposed on the rear side of the bundle cutting device 20, and a discharge port 54 is opened on the upper surface closer to one side than directly behind the circular cutter 36. An air jet pipe 55 is attached to one side of the discharge port 54, and an air supply hose 56 is connected to this air jet pipe 55. Air is ejected from the ejection port 55a of the air ejection pipe 55 toward the discharge port 54 as shown by the arrow.

Now, the article 61 suspended from the clamp member 1 is transferred toward the binding cutting device 20, and when one side of the accommodation portion 61a of the article 61 comes into contact with the torsion member 12a of the main rotating belt 12, the accommodation portion 61
a is forcibly rotated in the direction of the arrow P in FIG. 2 by the main rotating belt 12, which rotates at a rotational speed greater than the moving speed of the clamp member 1, and the binding portion 62 of the article 61 is twisted in the opposite direction of the arrow P. . Item 6
The other side of the housing portion 61a of 1 is the main rotating belt 1
It also comes into contact with the auxiliary rotating belt 13, which rotates in the opposite direction to that of the rotating belt 2, and the twisting is facilitated. The first feed pawl 17 of the feed chain 15 supports the binding portion 62 during transport of the article 61 and prevents it from swinging, and fulfills the function of preventing swing when twisting is applied. Moreover, as the article 61 approaches the binding cutting device 20, the shoulder of the storage portion 61a of the packaging bag 61 is pressed downward by the inclined lower guide rod 14, and together with the above-mentioned torsional action, the stored article is can be packed even more tightly.

On the other hand, when the opening 62 of the article 61 enters the recess 23 of the rotating member 22 from the guide passage 16 of the conveyance device 11 through the entrance 21a of the binding passage 21 as the clamp member 1 moves, the tip 28a of the tape 28 As shown in FIG. 4, the rotary member 22 is bent along the concave portion 23 so as to sandwich the binding portion 62, and then the rotation member 22 rotates as the binding portion 62 moves, thereby sandwiching and pasting the binding portion 62. At this time, the binding portion 62 receives a resistance force, but the first feeding claw 17
Since the second feed pawl 19 and the second feed pawl 19 cooperate to push the binding portion 62, the binding portion 62 is supported by both the feed pawls 17 and 19, and swinging of the binding portion 62 is prevented. In this state, the binding part 62 moves further and the cutting member 2
When the engagement protrusion 31 of No. 9 is pressed, the cutter 30 moves toward the binding passage 21 against the bias of the spring 33, and cuts the tip 28a of the attached tape 28 into the fifth
Cut as shown. During this cutting, the first and second feed claws 17 and 19 are about to separate from the binding portion 62.

After this binding, the binding portion 62 of the article 61 is guided from the end 21b of the binding path 21 to the cutting path 35.
Since the passage 35 is formed in an arc shape deviating from the moving direction A of the binding part 62, the bag opening part 62 is cut on the upper side of the tape 28 by the cutting edge 36a of the rotating circular cutter 36 while being pressed against the cutting edge 36a. be done. As a result of this cutting, the article 61 (see FIG. 5) falls from the clamp member 1 and is ejected, and the clamp member 1 has a cutting ear 62a (sixth
(see figure) remains. Blade edge 3 of circular cutter 36
6a is embedded in one side edge 35a of the cutting passage 35, so it completely blocks the passage 35 and the binding part 62
can be reliably applied to the cutting edge 36a.

When the guide plate 39 tilts downward from the highest position shown in FIG. 3 in synchronization with this binding and cutting,
The presser member 47 descends as it tilts, and the inner surfaces of both presser plates 49 come into contact with the cam roller 8 of the movable clamping plate 5 of the clamp member 1, as shown by imaginary lines in FIG. Due to this contact, the holding member 47 moves along the guide plate 39 as the clamp member 1 moves. During this time, the bundled portion 62 of the article 61 reaches the binding/cutting device 20, where it is bound with the tape 28 and cut by the cutter 30 as described above. Thereafter, when the guide plate 39 further tilts to the lowest position shown in FIG. 6, the presser member 47 descends while moving together with the clamp member 1 due to the tilting, and the presser plate 49 sinks into the cam roller 8 of the movable clamping plate 5. Then, the movable arm 7 of the movable clamping plate 5 rotates in the direction of arrow B against the bias of the spring 10, and the clamping surface 3a of the fixed clamping plate 3 and the clamping arm 6 of the movable clamping plate 5 open from each other. .

In synchronization with this opening, air is ejected diagonally downward from the air outlet 51a of the air blowing pipe 51 and hits the inner surface of the cutting ear 62a of the bag opening 62, as shown in FIG. 52 outlet 54
will definitely fall. In synchronization with this fall, air is ejected from the ejection port 55a of the air ejection pipe 55 to the discharge port 54, and the cutting ear 62a is reliably delivered to the discharge pipe 53.

Thereafter, when the guide plate 39 is tilted upward from the lowest position shown in FIG.
is separated from the cam roller 8 of the movable clamping plate 5, the movable arm 7 of the movable clamping plate 5 returns to its original position under the bias of the spring 10, and the gap between the clamping surface 3a of the fixed clamping plate 3 and the clamping arm 6 of the movable clamping plate 5 is increased. Close again. Furthermore, as the guide plate 39 tilts upward, the presser member 47
moves toward the proximal end along the oblique guide plate 39, and abuts against the stopper 50 at the lowest position shown in FIG. In this state, the next clamp member 1 is moved below the holding member 47, and the article 61 and cutting ear 62a are discharged under the same action as in the case described above.

Note that the cutting edge 36a of the circular cutter 36 may block only a portion of the cutting path 35.

Next, regarding another embodiment shown in FIG. 7, a part of the cutting edge 36a of the circular cutter 36 blocks the cutting path 35 and extends along one side edge 35a of the arc-shaped portion above the arc-shaped portion. Above the circular cutter 36, another auxiliary cutter 57 (in this embodiment, one having a straight cutting edge 57a) crosses each other. Due to this intersection, substantially V-shaped cutting grooves 58 are formed that diverge from the front intersection apex 58a of the cutting edges 36a, 57a of these cutters 36, 57.

When the bag opening 62 is transferred to the cutting groove 58 through the cutting path 35 (trajectory of movement), it is cut from both sides by the cutting edges 36a and 57a of the cutters 36 and 57. Therefore, the bag opening 62 can be cut more reliably.

Effects of the Invention In short, according to the first invention, by using the rotatable circular cutter 36, the opening portion 62 passing through the cutting passage 35 after bundling is efficiently and reliably cut, and the excess portion 62a is removed from the article 61. Can be removed.

Further, according to the second invention, by effectively combining the other cutter 57 in addition to the circular cutter 36, the opening portion 62 can be cut more reliably.

[Brief explanation of drawings]

FIG. 1 is a schematic front view showing a part of a bag filling and packaging machine equipped with a bag opening device according to an embodiment of the present invention;
The figures are a cross-sectional view taken along the line - - in Fig. 1, Fig. 3 is a partial side view showing the grip release action of the packaging bag, Fig. 4 is a partial plan view showing the binding cutting device and the cut edge discharge device, and Fig. 5 is the binding FIG. 6 is a partial side view showing the discharging action of the cut ears, and FIG. 7 is a partial plan view showing another embodiment. Clamp member...1, Conveyance device...11, Binding cutting device...20, Cutting path...35, Side edge...
35a, circular cutter...36, cutting edge...36
a, Air blow-off pipe...51, Air blow-off pipe...51a, Discharge pipe...53, Discharge port...54, Air blow-off pipe...
55, Spout...55a, Auxiliary cutter...5
7. Cutting edge...57a, Cutting groove...58, Packaging bag (item)...61, Mouth (binding part)...62, Cutting lug...62a.

Claims (1)

[Scope of Claims] 1. A guide passage 16 which is constituted by a guide member and a feeding member and is configured to transfer the packaging bag 61 while giving a twist to the opening 62 of the packaging bag 61; A binding passage 21 for binding the mouth part 62 of the twisted packaging bag 61 with tape 28, and a cutting passage 35 that continues in an arc shape with the binding passage 21 and for cutting the bound mouth part 62.
and a part of the cutting edge 36a on the outer periphery of the cutting passage 35.
A bundling cutting device characterized by comprising: a circular cutter 36 rotatably provided so as to interrupt the winding. 2. The bundle cutting device according to claim 1, wherein a part of the cutting edge 36a of the circular cutter 36 is embedded below one side edge 35a of the cutting passage 35. 3. A guide passage 16 which is composed of a guide member and a feeding member and is used to transfer the packaging bag 61 while imparting a twist to the opening 62; A binding passage 21 for binding the mouth part 62 of the packaging bag 61 with tape 28; and a cutting passage 35 that continues in an arc shape with the binding passage 21 and cuts the bound mouth part 62.
and, while blocking the cutting passage 35 with a part of the cutting edge 36a on the outer periphery, the arc-shaped one side edge 35 of the cutting passage 35
A circular cutter 36 rotatably provided along a.
and an auxiliary cutter 57 disposed above the circular cutter 36 so as to intersect with the circular cutter 36.