JP2564818Y2 - Folding device for automatic packaging machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ear-folding device of an automatic wrapping machine suitable for so-called caramel packaging of six laminates of square or rectangular paper products such as notebooks, magazines, etc. While intermittently transporting on the same plane by the device,
The present invention relates to a folding mechanism on a rear surface side of an open cylindrical protruding end portion which is wound around a body and protrudes to both sides.

[0002]

2. Description of the Related Art Conventionally, as an automatic packaging machine for automating the caramel packaging of laminated paper products of square or rectangular paper products such as notebooks and magazines, an automatic packaging machine described in Japanese Patent Application Laid-Open No. 4-215904 by the present inventors has been proposed. It has been known. According to this automatic packaging machine, in the case of packaging of a laminated body having a central portion of a bound printed material whose one side edge is slightly bulged, the packaging state is shifted during work, or both ends are bent up and bent inward. In order to prevent, the transport device that feeds and transfers the packaged object while holding it from above and below is continuously arranged at a predetermined interval on the same plane, without moving the packaged up and down or gluing, In this method, body-wrap packaging and ear-fold packaging are performed while intermittently transporting on the same plane. This simplifies the packaging process and improves work efficiency.

[0003]

However, in the ear-folding mechanism of the automatic packaging machine, the inside of the rear end portion of the open tubular shape after the bobbin wrapping is folded inward by the folding arm. Pushed in, the body-wrapped package was moved to the downstream side as it was and slid into the inside of the long strip-shaped fixed holding plate whose front end was gently warped outward, so the vertical corner of the rear side protruding end. Has a problem that it is slightly pulled to the upstream side due to friction between the folding arms, so that wrinkles are easily generated there and a clean crease cannot be formed.

Accordingly, the present invention has been made in view of the above-mentioned problems of the ear fold device of the automatic wrapping machine, and therefore, the ear of the automatic wrapping machine which enables the clean fold of the ear fold packaging, particularly the fold of the protruding end portion on the rear side. It is an object to provide a folding device.

[0005]

According to the automatic packaging machine of the present invention, the upper and lower sides of the article to be packaged are intermittently pressed by the transporting apparatus continuously arranged at predetermined intervals on the same plane. While being conveyed, the square or rectangular laminated package is wound around the body and the front and rear sides of the open cylindrical protruding end protruding to both sides are sequentially folded inward, and the overlapped portions are thermally welded to each other. Automatic packaging machine
A long strip-shaped fixed holding plate in which the upstream end, which is disposed along the left and right side surfaces of the packaged object, is gradually warped outward,
On the upstream side of the fixed holding plate, there is provided a folding arm that bends a protruding end of the rear side of the packaging material.

The folding arm includes an arm body having a movable pressing element pivotally attached to a tip end thereof via a spring, an upper guide slidably supporting the arm body toward a side surface of the packaged object, and an upper guide. A lower guide supported reciprocally in the traveling direction of the packaged object, and a movable presser at the tip of the arm body presses the rear vertical corner of the packaged object from above the packaging material and along the side surface. By sliding to the downstream side, the rear end protruding end is folded.

According to a second aspect of the present invention, in the ear folding device according to the first aspect of the present invention, the arm body is disposed at a slightly inclined angle on the downstream side, and the front surface of the support piece on which the movable pressing element is pivotally mounted. In addition to forming an upstream plane parallel to the side of the packaged object and an inclined surface that opens toward the downstream side,
The presser is urged toward the inclined surface, and in a no-load state, the movable presser is held in contact with the inclined surface, and the inclination angle at which the movable presser downstream side is opened with respect to the side surface of the article to be packaged. It is configured to maintain.

[0008] Further, according to a third aspect of the present invention, there is provided an ear folding device, wherein at the upstream end of the fixed holding plate in the invention of the second aspect,
The arm body is configured by pivotally connecting a presser bar which is freely contactable and detachable on the side surface of the packaged object along the upper and lower edges of the movable pressing element of the arm body in a state of contacting the side surface of the packaged object. Further, according to a fourth aspect of the present invention, in the ear folding device according to the first aspect of the present invention, the movable pressing element of the arm body is rotatably mounted at least in the downstream direction, and is urged to the downstream side. After the movable presser advances along the rear side of the body-wound package, the movable presser rotates while pressing the rear vertical corner from above the packaging material, and slides downstream along the side. By doing so, the protruding end of the rear surface side is folded.

[0009]

According to the edge folding device of the automatic packaging machine of the present invention, the rolled package wrapped in a rectangular tube by the transport device is conveyed in front of the folding arm while being pressed and clamped up and down. First, the front side protruding end portion is pushed into the inside of the upstream end portion which is gently warped to the outside of the fixed holding plate, and is folded inward.

[0010] The movable pressing element of the folding arm comes into contact with the protruding end of the body-wound package on the rear side thereof and folds it inward. The spring urges the movable pressing element forward, and presses the movable pressing element against the side surface of the packaged object with an appropriate pressing force. The upper guide is for mounting the arm body slidably by a guide rail or the like, and the lower guide is for mounting the upper guide reciprocally in the traveling direction of the packaged object by the guide rail or the like. is there. The arm body and the upper guide are driven by driving forces of an air cylinder, a hydraulic cylinder, and the like, respectively.

The movable pressing element support piece of the ear folding device according to the second aspect supports the movable pressing element so as to be rotatable in the horizontal direction, and the upstream flat surface parallel to the side surface of the article to be packaged has the pressing function. The movable presser is urged by a coil spring or the like to contact the inclined surface which is opened toward the downstream side in a no-load state. It functions to maintain the inclination angle at which the downstream side of the movable presser is opened with respect to the side surface of the packaged object.

According to a third aspect of the present invention, the presser bar of the ear folding device presses the side surface of the object to be packaged along the upper and lower edges of the movable presser which is in contact with the side surface of the object to be packaged, and moves the movable presser away from the side surface. The folded back surface is used to hold the protruding end even after folding. The roller of the ear-folding device according to claim 4,
When the movable presser moves to the downstream side while being pressed by the rear surface and the side surface of the body-wrapped package, the movable presser rolls on the rear surface and the side surface of the body-wrapped package to reduce the frictional force between the movable presser and the package.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an automatic wrapping device according to an embodiment of the present invention; FIG. 1 shows the outline of an automatic wrapping machine in which the ear folding device of the present invention is used, and a wrapping process A for wrapping a wrapped product in a rectangular tubular shape leaving portions protruding on both left and right sides. The packaging is performed through an edge folding step B in which the protruding end is folded inward, and a finishing step C in which the edge folding overlapping portion is welded and stopped. The present invention is an apparatus used for the folding process B in the above.

The roll wrapping material 1 used in the present packaging includes:
A heat-sealable semi-rigid plastic film or a heat-sealable plastic coated on at least the inner surface is used, and a pair of upper and lower two are disposed so as to be able to be fed out, respectively. This packaging is carried out intermittently by pressing and holding the upper and lower sides of the article to be packaged P by a pair of upper and lower transporting devices 2, 2a arranged at a predetermined interval on the same plane throughout the entire packaging process.

In the body winding step A, the body to be packaged is formed by passing the article to be packaged between the heating press member 3a and the pressure bonding member 3b of the welding and cutting device 3 by the conveying devices 2 and 2a. That is, the tip of the packaging materials 1, 1 fed from above and below are welded and cut by the welding and cutting device 3.
After heating to form a vertical packaging material surface, the heating press member 3a and the pressure bonding member 3b are widely opened up and down to form a passage for the product to be packaged, and the material to be packaged is directed toward the vertical packaging material surface. P is pushed in with the packaging material, and is received by the downstream-side transport device, and is transported further downstream while being pinched and pressed from above the packaging material, whereby the front surface and the upper and lower surfaces are covered. Next, the heating press member 3a and the pressing member 3b push down the upper and lower packaging materials along the rear surface of the article to be packed, respectively, move to the center while pushing up, and perform welding and cutting at the center, thereby leaving protruding portions on the left and right sides. It is wound around a rectangular tube.

FIG. 2 shows a time-dependent change in the packaging state of the main packaging after the body winding state.
The upper and lower surfaces thereof are nipped and pressed by the transporting devices 2 and 2a, and further transported to the next edge folding step B. The protruding end portions formed into rectangular cylinders on both sides are fixed to the front side 1a by the fixed pressing plate 4. The folding arm 10 sequentially folds the rear side 1b, the folding plate 5 folds the lower surface 1c, and the folding plate 6 folds the upper surface 1d.

The packaged object P1 folded inside in the edge folding step B is transported further downstream to the front of the sealing heater 7, and the overlapping portions of the upper and lower protruding ends 1d and 1c are fused together by the sealing device. The packaging is completed by bonding. Here, the upper and lower side protruding ends 1d, 1
Since the overlapped portion c is located on the extension body 4a of the fixed holding plate 4, it is pressed and heated between the extension body 4a and the heater 4 so as to be fused, so that the packaged object There is no risk of damaging the paper products.

FIGS. 3 and 4 show an ear-folding device for folding the front and rear protruding ends in the above-described ear-folding process B according to the present invention, and the upstream end disposed opposite to the left and right side surfaces of the article to be packaged. A fixed holding plate 4 in the form of a long belt plate whose part is gently warped outward, and a folding arm 10 that bends a protruding end of the rear side of the packaging material upstream of the fixed holding plate. The folding arm 10 includes an arm body 11 and the arm body 1.
The upper guide 20 is slidably supported toward the side surface of the article P1, and the lower guide 30 supports the upper guide 20 reciprocally in the traveling direction of the article.

The arm body 11 is provided with a plate-shaped movable presser 13 urged forward by a spring S on the distal end side of the support plate 12. The movable presser 13 is pivotally mounted on a support piece 14 having a front surface having an upstream side surface 14a parallel to the side surface of the packaged object and an inclined surface 14b opened toward the downstream side. 14a,
14b so as to prevent its rotation. Further, the movable pressing element 13 is urged toward the inclined surface 14b by a coil spring (not shown) mounted on the pivot 13a, and in an ordinary state, the inclination angle opened to the downstream with respect to the side surface of the packaged object is maintained. I am trying to be.

The rear end of the arm body 11 is
The arm body 11 is bolted to a support block 15 slidably mounted on the three guide bars 21, 22 and 22. The arm body 11 is compressed by an air cylinder (not shown).
One side is controlled to be reciprocally driven. The upper guide 20 is supported by a support block 23 at the lower center, and is slidably mounted on the three guide bars 31, 32, 32 of the lower guide 30 via the support block, and an air cylinder (not shown). As a result, the package P1 is controlled to be reciprocally driven in a direction parallel to the side surface of the packaged object P1.

Here, the upper guide 20 is disposed with its tip end slightly inclined in the traveling direction of the packaged object P1, so that the movable pressing element 13 of the arm body 11 is located on the downstream side with respect to the side surface of the packaged object. It acts so as to exert a pressing action in the advancing direction, that is, to push the protruding end 1b of the packaging material toward the downstream side. The fixed holding plate 4 is disposed downstream of the folding arm 10, and the upstream end of the fixed holding plate has a shape that is slightly curved outward. On the outer surface of the upstream end of the fixed holding plate 4, two parallel holding rods 41, 41 are pivotably connected to each other. The presser bar 4
Reference numerals 1 and 41 pass through the upper and lower edges of the movable pressing element 13 of the folding arm, and are attached to the side of the packaged object P1 so as to be freely separated from each other.

Next, the folding operation of the ear folding device will be described. When the body wound package P1 is conveyed by the conveying devices 2 and 2a, first, the fixed holding plate whose front side protruding end 1a is gradually warped. 4 is pushed between the inner side surface of the upstream end portion and the side surface of the packaged object and is folded inward. When the upstream end of the fixed holding plate 4 reaches a substantially middle point of the packaged object P1, the transporting devices 2 and 2a stop, and as shown in FIG.
1 starts to extend toward the side surface of the packaged object P1. At this time, the movable pressing element 13 at the tip of the arm body 11 is
The arm body 11 is disposed obliquely toward the downstream side by being biased toward the side of the inclined surface 14b of the object P1, and the movable pressing element 13 protrudes from the rear side. It advances while pushing the end 1b to the downstream side. The upstream end of the movable presser 13 contacts the upstream corner of the article to be packaged, and further advances while resisting the urging force of a coil spring (not shown) mounted on the pivot 13a. The whole comes into contact with the side surface of the packaged object P1 to reach the state shown in FIG.

The entire front surface of the movable presser 13 is the object P1 to be packaged.
When contacting the side surface, the upper guide 20 is guided by the lower guide 30 and moves downstream. At this time, the movable pressing element 13
Will move downstream while pressing the rear protruding end portion 1b by the spring S, so that a clean crease is formed at the rear side corner of the body-wrapped package P1 without wrinkling. .

The downstream end of the movable pressing element 13 is the packaged object P1.
Of the upper guide 20 is stopped, and the air cylinder 42 is actuated to move the holding rods 41, 41 so that the rear side protruding end 1b is moved. While holding down (Fig. 6), the arm body 11
Retreats on the upper guide 20 (FIG. 7). Then, from the state of FIG. 7, the upper guide 20 moves on the lower guide to the upstream side, and repeats the above operation while interlocking with the movement of the transporting devices 2 and 2a.

FIGS. 8 to 10 show a folding arm 50 according to another embodiment.
Except for the point where 0 is orthogonal and the arm main body 51, the configuration is the same as that of the above-described folding arm 20, and therefore only different portions will be described. The arm main body 51 includes a plate-shaped movable pressing element 53 urged forward by a spring S on the distal end side of the support plate 52. This movable pressing element 53
Is pivotally mounted on a support bar 52b to which the spring S is attached, and a support piece 52a fixed to the end of the support rod 52b so as to be horizontally rotatable. A roller 54 is provided at the upstream end of the movable pressing element 53.
Is rotatably mounted with its outer peripheral edge facing the contact surface of the movable pressing element, and a permanent magnet piece 53b is mounted on the back side of the opposite downstream end.

The movable pressing element 53 has a pivot 53a.
Is urged to the downstream side by a coil spring (not shown) mounted on the arm body 51, and normally contacts the downstream side surface of the arm main body 51 with the roller 54 as the tip side with respect to the traveling direction of the packaged object P1. To maintain a right angle posture. Further, a magnetic piece 52c is fixed to the side of the support plate of the arm body 51 corresponding to the permanent magnet piece 53b of the movable pressing element 53, and the movable pressing element is perpendicular to the traveling direction of the packaged object P1 in the state. Posture is sure.

The folding arm 50 thus configured is
As shown in FIG. 10, at the time of initial movement, the movable pressing element 53 is arranged to extend to the rear upstream side of the conveyed packaged object P1. The movable presser 53 extending upstream from the rear surface of the packaged object P <b> 1
When the roller 54 contacts the rear surface of the body-wound package P1 and moves to the downstream side, the movable presser 53 rotates around the pivot 53a while pressing the rear corner of the packaged object from above the packaging material. First, as shown in FIG. 8, the entire contact surface of the pressing element presses the rear protruding end 1b, and moves to the downstream side as it is.

By this folding operation, a clean fold was formed at the rear corner of the rear end 1b without any wrinkles.

[0029]

According to the edge folding device of the automatic packaging machine of the present invention, it is possible to carry out caramel packaging with a clean fold at the corner ridge without forming a wrinkle at the vertical corner of the protruding end on the rear side. . According to the ear-folding device of the automatic packaging machine according to the second aspect, the movable pressing element support piece maintains the movable pressing element at the inclination angle in which the downstream side is opened with respect to the side surface of the article to be packaged. Has the effect of ensuring the smooth and smooth operation of folding inward at the beginning of the contact to prevent the occurrence of wrinkles due to pushing outward and the tearing of the packaging material.

According to the third aspect of the present invention, the rear folding side of the presser bar is folded by the movable presser to maintain the folded state of the rear end, so that creases are held and creases are generated. It has the effect of ensuring prevention. According to the edge folding device of the automatic packaging machine according to the fourth aspect, since the movable pressing element moves to the downstream side while pressing from the rear side to the side of the article to be packaged, the vertical corner ridge of the protruding end on the rear side. A more reliable and clean fold can be formed.

[Brief description of the drawings]

FIG. 1 is a perspective view for explaining an outline of a packaging process of an automatic packaging machine in which an ear folding device according to an embodiment of the present invention is used.

FIG. 2 is a perspective view showing a time-dependent change in a packaging state after the body winding state by the automatic packaging machine;

FIG. 3 is a plan view showing the edge folding device of the automatic packaging machine according to the present invention.

FIG. 4 is a side view showing the folding arm;

FIG. 5 is a schematic plan view for explaining the operation of the folding arm.

FIG. 6 is a schematic plan view for explaining the operation of the folding arm.

FIG. 7 is a schematic plan view for explaining the operation of the folding arm.

FIG. 8 is a plan view showing a folding arm according to another embodiment.

FIG. 9 is a side view showing a folding arm according to another embodiment.

FIG. 10 is a schematic plan view for explaining a folding operation of a folding arm according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roll packaging material 1a Front side protruding end part 1b Rear side protruding end part 2, 2a Conveying device 3 Welding and cutting device 4 Fixed holding plate 5 Folding plate 6 Folding plate 10, 50 Folding arm 11, 51 Arm body 13, 53 Movable presser 14a Upstream flat surface 14b Inclined surface 20, 60 Upper guide 30, 70 Lower guide 41 Pressing rod 54 Roller S Spring

Claims (4)

(57) [Scope of request for utility model registration] 1. A rectangular or rectangular laminated packaged object is rolled while intermittently conveying the packaged object by pressing and nipping the upper and lower sides of the packaged object by a conveying device continuously arranged at predetermined intervals on the same plane. In an automatic packaging machine in which the front and rear sides and the upper and lower sides of the open cylindrical protruding end protruding to both sides are sequentially folded inward and the overlapped portions are heat-welded to each other, the automatic packaging machine is disposed to face the left and right sides of the article to be packaged. A fixed holding plate in the form of a long band plate whose upstream end is gently warped outward, and a folding arm that bends a protruding end of the rear side of the packaging material upstream of the fixed holding plate. The folding arm has an arm body with a movable presser pivotally attached to the tip thereof via a spring, an upper guide slidably supporting the arm body toward a side surface of the packaged object, and an upper guide for the packaged object. Reciprocating in the direction of travel A lower guide freely supported, and a movable presser at the tip of the arm main body presses a vertical corner portion on the rear surface side of the article to be packaged from above the packaging material and slides downstream along the side surface so as to slide on the rear side. An edge folding device for an automatic packaging machine, wherein the protruding end is folded in. 2. The arm body is arranged at a slightly inclined angle on the downstream side, and a front side of a support piece on which the movable pressing element is pivotally mounted has an upstream plane parallel to a side surface of the article to be packaged and a downstream side. A pressurizing element is urged toward the inclined surface, and in a no-load state, the movable presser is held in contact with the inclined surface and is formed on the side surface of the article to be packaged. 2. The ear-folding device for an automatic packaging machine according to claim 1, wherein the inclination angle at which the downstream side of the movable pressing element is opened is maintained. 3. An upstream end of the fixed holding plate is freely movable on and off the side surface of the packaged object along the upper and lower edges of the movable presser of the arm body in a state of contact with the side surface of the packaged object. 3. The folding device for an automatic packaging machine according to claim 2, wherein the presser bar is pivotally mounted. 4. The movable pressing element of the arm body is rotatably mounted at least in a downstream direction, is urged downstream, and has a rotatable roller at an upstream end. After the movable presser advances along the rear side of the body-wrapped package, the rear side protruding end portion is formed by rotating while pressing the rear vertical corner from above the packaging material and sliding downstream along the side surface. The edge folding device for an automatic packaging machine according to claim 1, wherein the edge folding device is folded.