JPH0246454B2 - - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a packaging material cutting and removing device, and particularly to a packaging material cutting and removing device that cuts and removes packaging material from a cylindrical package. Regarding.

(Prior Art) In general, can lids for food cans and other food cans filled with food products such as beer and soft drinks are stacked in a cylindrical shape in a can manufacturing process, wrapped in wrapping paper, and then sent to a canning process. The wrapped can lids are filled with contents without removing the wrapping paper during the canning process, and are supplied one by one to the can body in the seaming process, where they are placed over the mouth of the can body and rolled. The closing will take place.

Therefore, there is a device described in Japanese Patent Publication No. 56-41498 for removing wrapping paper from a package in which cylindrical contents such as can lids are wrapped in wrapping paper, as described above.
This device has a gripper 5 as shown in FIG.
1 and 52 grip the wrapping paper 54 (FIG. 9),
In this state, the package 53 is lifted and the cutter 55 is driven to cut the wrapping paper 54 (FIG. 10). Then, open the grippers 51 and 52 to remove the lift gutter 5.
6 receives the package 53 (FIG. 11), and then feeds the package 53 onto a pair of rolls 57 and 58, which are then reversed to form the wrapping paper 5.
4 Roll the lower side between rolls 57 and 58 and wrap the wrapping paper 5
The incision and removal work in step 4 is completed (FIG. 12).

(Problems to be Solved by the Invention) However, in the above-mentioned device, the cutter 55 is located between the grippers 51, 52 and the package 53, and the cutter approaches the contents when cutting. There is a problem in that the contents may be damaged due to direct contact of the cutter with the object.

Furthermore, since the entire package must be lifted before cutting the wrapping paper, the gripper must be equipped with a lifting device, which complicates the structure of the entire device and increases the cost of the device. Further, in the incision and removal process, there is also the problem that the process of lifting the entire package results in wasted time and excessive energy consumption.

The present invention was devised in view of the above circumstances, and its purpose is to cut and remove the packaging material from the packaging body without damaging the contents of the packaging body and without going through a lifting process of the packaging body. An object of the present invention is to provide a packaging material cutting and removing device.

[Structure of the invention]

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a support member that supports a cylindrical package covered with a sheet-like packaging material, and a support member disposed above the package. a pair of push plates that move toward each other while contacting the top of the package to form a bag-shaped slack portion in the package that extends in the axial direction of the package; and a pair of push plates arranged slightly above the push plates. and a cutter that cuts in the axial direction a bag-shaped slack portion formed in the packaging material, and the support member constitutes a packaging material removal device for removing the cut packaging material from the packaging body. It is characterized by:

(Function) The present invention uses the above means to move a pair of push plates connected to a pair of links in a direction in which they approach each other while contacting the upper part of the package, thereby forming a bag-shaped slack in the packaging material on the outer surface of the package. This bag-shaped slack portion is cut open using a cutter located slightly above the push plate, and then the cut packaging material is removed from the package by a packaging material removal device.

(Example) Hereinafter, an example of the packaging material incision and removal device according to the present invention will be described with reference to FIGS. 1 to 8.

FIG. 1 is a side view of the packaging material cutting and removing device M. In the same figure, reference numerals 1a and 1b indicate a pair of rollers constituting a support member for supporting the packaging body, and the packaging material on these rollers 1a and 1b is The body 2 has a cylindrical shape with a predetermined length, and its outer surface is covered with a sheet-like packaging material 3.
covered with.

In the present invention, the term cylindrical means that the shape of a general can lid is circular, and the package made by stacking these can be cylindrical, but elliptical or polygonal shapes are also used for can lids. It can also be used for packages of shapes such as these, so the term is defined to include these shapes as well.

Further, FIG. 2 is a front view of the packaging material cutting and removing device 1, in which side plates 4 and 5 are arranged at both ends, and a top plate 6 is installed between the side plates 4 and 5. A support pipe 7 made of a square pipe is suspended from the top plate 6. That is, the support pipe 7
A support shaft 9 is fixed to the upper end, and a compression coil spring 11 is interposed between the handle 10 screwed onto the upper part of the support shaft 9 and the top plate 6. Due to the upward biasing force of this compression coil spring 11, The support pipe 7 is supported by the top plate 6, and by rotating the handle 10, the biasing force of the spring 11 changes, and the force with which the package is pressed at the tip of the push plate can be adjusted. Further, guide shafts 12 and 13 are fixed near both ends of the support pipe 7, and guide members provided at the tips of the guide shafts 12 and 13 slide into sleeves 14 and 15 fixed to the top plate 6, respectively. They are movably fitted, thereby preventing the support pipe 7 from tilting.

Further, a pair of links 17A and 17B are provided at one end of the support pipe 7, and a pair of links 18 are provided at the other end.
A and 18B (18B is not shown) are pivotably supported, respectively, and as shown in FIG. 1, gears 20A and 20B that mesh with each other are provided at the upper ends of the pair of links 17A and 17B. Similarly, gears 21A and 21B (21B not shown) that mesh with each other are provided at the upper ends of the pair of links 18A and 18B.

On the other hand, a push plate 22 is installed between the link 17A and the link 18A, and the link 17
A push plate 23 is installed between B and link 18B, and these pair of push plates 22, 2
The leading ends 22a and 23a of 3 are brought into contact with and engaged with the packaging material 3 of the packaging body 2. Therefore, the degree of contact of the push plates 22, 23 with the package 2 can be adjusted by adjusting the biasing force of the compression coil spring. That is, the handle 10
By rotating the spring 11, the biasing force of the spring 11 changes, and the force with which the package 2 is pressed by the pushing plate tips 22a and 23a can be adjusted. Also, when the biasing force of the spring 11 changes, the links 17 and 18 move up and down slightly, which causes the guide rolls 27 and 28 to move up and down slightly.
(Described later) Push plates 22 and 23 swing in the center,
The contact angle θ of the push plate shown in FIG. 1 with the package 2 can be adjusted. Furthermore, in order to accommodate a wide variety of products, the side plates 4,
5 can be adjusted in FIG.

Further, the push plate 22 is connected to a drive cylinder 25, and as shown in FIG. 2, guide rollers 27A,
Similarly, guide rollers 28A and 28B are provided at both ends of the push plate 23. The guide rollers 27A, 27B roll on guide rails 29A, 29B formed with predetermined cam curves provided on the side plates 4, 5, and the guide rollers 28A, 28B (28B is not shown) roll on the side plates 4, 5. , 5 roll on guide rails (not shown) provided on the pushing plates 22, 23 so that the tips 22a, 22b of the pushing plates 22, 23 move closer to each other while contacting the surface of the cylindrical package 2. .

On the other hand, as shown in FIG. 2, a support shaft 31 is vertically provided on the side plate 4, and a slider 3
2 are slidably fitted. One end of the pair of links 33A, 33B is pivotally supported by the slider 32, while the other end of the pair of links 33A, 33B is connected to the pair of links 17A, 17B. 33
A and 33B constitute a four-bar link as shown in FIG. Similarly, a slider 36 is fitted onto a support shaft 35 fixed to the side plate 5, one end of a pair of links 37A, 37B is pivotally supported on this slider 36, and the other end is connected to a pair of links 18A, 18B. , this causes links 18A, 18B, 37
A and 37B constitute a four-bar link.

Further, as shown in FIGS. 2 and 3, a support shaft 39 is installed between the link 17A and the link 18A, and a cutter block 40 having a substantially U-shaped cross section is pivotably supported on the support shaft 39. has been done. The cutter block 40 has a ball 41 on its top.
is fitted, a cutter 42 is attached to the lower part, and one end of a tension coil spring 43 is connected to the middle part thereof. The cutter 42 is the push plate 22
The other end of the tension coil spring 43 is connected to a support bracket 44 installed between the links 17A and 18A, and is attached to hold the cutter block 40 in the state shown in FIG. It is strong. When the links 17A and 17B are swung by the driving cylinder 25 so that the push plates 22 and 23 approach each other, the ball 4
1 comes into contact with the side wall 17C of the link 17B, the cutter block 40 swings, and the cutter 42 is activated. Further, as shown in FIG.
It is designed to be reciprocated along the axial direction.

Next, the operation of the packaging material incision and removal device M according to the present invention configured as described above will be explained with reference to FIGS. 4 to 8.
This will be explained with reference to the figures.

First, as shown in FIG. 4, the package 2 covered with the packaging material 3 is placed on rollers 1a and 1b.
Next, as shown in FIG. 5, when the drive cylinder 25 is actuated to push the push plate 22, the link 17
A, 18A swings, and in synchronization with this, link 17
B, 18B swing, the push plate 23 moves toward the center, and the tips 22a, 23a of the pair of push plates 22, 23 approach each other while coming into contact with the packaging material 3 along the top surface of the package 2. do. At this time, a bag-shaped slack part 3a is formed in the packaging material 3 along the axial direction of the package 2, and this bag-shaped slack part 3a
becomes larger as the pair of push plates 22, 23 approach, and the upper end of the slack portion 3a is pinched by grippers 47, 48 made of spring bodies provided on the links 17A, 7B. Then, the ball 41 fitted in the cutter block 40 is connected to the link 1.
The cutter block 4 comes into contact with the side wall 17C of 7B.
0 swings, and the serrated cutter 42 bites into the packaging material 3. After that, the drive cylinder 45 operates, and the sixth
As shown in the figure, the cutter 42 reciprocates in the axial direction of the package 2 and the package 3 is cut open.

Next, the pair of rollers 1a and 1b constituting the take-up roller are rotated in the direction shown by the arrow while the package 2 is being pushed by the push plates 22 and 23. When the rollers 1a and 1b grip the lower part of the packaging material 3 and begin to peel off the packaging material 3, the drive cylinder 25 is returned to its original position (see FIG. 8). Then, the cut packaging material 3 is rolled up and removed from the packaging body 2. Note that if the packaging body 2 is sufficiently heavy, the packaging material 3 can be rolled up without leaving the push plates 22 and 23 as they are.

〔Effect of the invention〕

As explained above, according to the present invention, as a means for forming a slack in a cylindrical packaging body covered with a sheet-like packaging material before cutting the packaging material, the cylindrical packaging body is Using a pair of push plates that move toward each other while touching the left and right sides parallel to The material can be made evenly across the entire axial direction, which means that it can be cut cleanly with a knife-like cutter.
The package can be reliably cut without the need to move the package in the axial direction, and there is no need to use a cutter rotation drive mechanism or a mechanism to feed the package in the axial direction, resulting in a greatly simplified configuration. This leads to a continuous formation of sag,
When cutting with the cutter, the package is not broken, and no uncut or cut pieces of the packaging material come out, and since the cutter is configured to move at a position slightly above the push plate, there is no risk of damaging the can lid. Furthermore, the packaging material can be peeled off after the incision is made by pulling the packaging material downward between a pair of rollers that support the packaging material, without using a mechanism with a complicated structure. It has various effects, such as being able to be removed easily since it is incised, and being extremely simple in structure.

[Brief explanation of drawings]

FIG. 1 is a side view showing an embodiment of the packaging material cutting and removing device according to the present invention, FIG. 2 is a front view of the same device, FIG. 3 is a partially cutaway side view of the same device, and FIGS.
The figure is an explanatory diagram of the operation of the same apparatus, and FIGS. 9 to 12 are explanatory diagrams of the conventional apparatus. 1...roller, 2...packaging body, 3...packaging material,
4, 5...Side plate, 6...Top plate, 7...Support pipe, 9...Support shaft, 10...Handle, 11...
Compression coil spring, 12, 13... Guide shaft, 14, 15... Sleeve, 17, 18... Link, 20, 21... Gear, 22, 23... Push plate, 25... Drive cylinder, 27, 28 …
...Guide roller, 29...Guide rail, 31,
35... Support shaft, 32, 36... Slider, 3
3, 37...Link, 39...Support shaft, 40...
cutter block, 42... cutter, 43... tension coil spring, 45... drive cylinder, 4
7,48... Gritspa.

Claims (1)

[Claims] 1. A support member that supports a cylindrical package covered with a sheet-like packaging material, and a support member that is disposed above the package and moves in a direction toward each other while contacting the top of the package. a pair of pushing plates that form a bag-shaped slack part extending in the axial direction of the packaging material in the packaging material; A packaging material cutting and removing device comprising: a cutter that cuts along the packaging material, and the supporting member constitutes a packaging material removal device for removing the cut packaging material from the package. 2. The packaging material cutting method according to claim 1, wherein the pair of push plates are connected to a pair of links, and the pair of links swing the pair of push plates in a direction toward each other. removal device. 3. The packaging material cutting and removing device according to claim 1, wherein the packaging material removing device comprises a winding roller for winding up the cut packaging material and removing it from the package.