JPH09188301A - Wrapping method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the wrapping speed and to reduce the material loss of a strip-shaped sheet in a method in which a flat product inserted between a pair of strip-shaped sheets by welding and cutting the strip-shaped sheets at the prescribed position. SOLUTION: After a plurality of products M, M are arranged on a lower strip-shaped sheet 1 among upper and lower strip-shaped sheets 1, 1 in the width direction of the strip-shaped sheet 1, edge part on each side of the strip- shaped sheets 1, 1 is welded and a scrap part on its outer side is removed, right and left boundary parts parallel in the transferring direction between the products M, M are welded simultaneously with or subsequently to the welding, the right and left boundary parts are divided in the right-to-left direction, a boundary part in the longitudinal direction between the product M and its rear product M is welded simultaneously with or subsequently to the welding, and the longitudinal boundary part is divided in the longitudinal direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging method, and more particularly to a method for packaging a flat product inserted between a pair of upper and lower strip-shaped sheets by welding and dividing the strip-shaped sheets.

[0002]

2. Description of the Related Art Conventionally, as a packaging method, there is one shown in FIGS. In this method, the pair of film-shaped sheet-like sheets (1) (1) pulled out from the rolls run in the longitudinal direction in a state of being vertically stacked. And
A plurality of flat products (M) (M) are placed one by one on the lower strip-shaped sheet (1) before overlapping the strip-shaped sheets (1) (1). As a result, the products (M) (M) are arranged in a line along the transfer direction between the belt-shaped sheets (1) (1) in the stacked state.

After that, both side edges of the strip-shaped sheets (1) (1) on which the products (M) (M) are arranged are welded. Typically,
When stacking the upper and lower strip-shaped sheets (1) and (1) in the running state, it is difficult to exactly match the upper and lower end edges with each other, so in order to ensure the welding of the both end edges,
The width of the welded portion is set to be large with a margin. Therefore, after the welding, a trimming process for cutting off the scrap portion on the outer edge of the welded portion is performed. As a result, the both side edge portions are finished.

After that, the front and rear boundary portions between the product (M) and the product (M) behind the product (M) are fused. As a result, the product (M) is packaged. Then, since these series of steps are continuously executed, a large number of the products (M) (M) are efficiently packaged.

[0005]

However, in this conventional device, the number of packages per unit time is limited, and the amount of scraps per package cannot be reduced. In the step of welding the both side edge portions, and in the step of fusing the front and rear boundary portions, since a constant processing time is essential, the traveling speed of the belt-shaped sheet (1) (1) is increased to a predetermined speed or more. Can not. Moreover, the product (M) (M) is
Since the upper and lower strip-shaped sheets (1) (1) are only arranged in a line, the processing time is indispensable for each packaging of one product (M), and the packaging speed cannot be increased.

Further, since the scrap portions removed by the trimming process are generated on both sides of each of the products (M) and (M), the large amount of scrap is a big problem in the case of mass packaging. It was According to the invention of claim 1, "the flat sheet (M) is inserted between a pair of upper and lower strip-shaped sheets (1) (1) running in the longitudinal direction in a state of being overlapped with each other. (1) A method of packaging the product (M) (M) by fusing and cutting at a predetermined position '',
(M) With increasing the packaging speed of (M), the strip-shaped sheet (1)
The problem is to reduce the material loss in (1).

[0007]

[Means for Solving the Problems] According to the means for solving the problems of the invention of claim 1, "a plurality of the products (M) (on the strip-shaped sheet (1) below the strip-shaped sheets (1) (1) M) is the strip sheet
(1) arranging in the width direction, a first welding step of welding both side edge portions of the strip-shaped sheet (1) (1) on which the products (M) (M) are arranged, and the first welding step At the same time as or after the trimming step of cutting off the scrap portion of the outer edge of the both side welded portions of the strip-shaped sheet (1) (1) welded in the welding step, or after the product (M) (M ) A second welding step for welding the left and right boundary portions parallel to the transfer direction, and the front and rear boundaries between the product (M) and the product (M) behind it at the same time as or after the first welding step. A third welding step of welding a portion, a first cutting step of dividing the left and right boundary portions into right and left at the same time as or after the second welding step, and a front and rear boundary portion at the same time as or after the third welding step. And a second dividing step of dividing into front and rear. "

In this product, a plurality of the products (M) (M) are arranged in the width direction of the strip-shaped sheet (1) on the lower strip-shaped sheet (1) running in the longitudinal direction. Thereby, between the upper and lower strip-shaped sheets (1) (1) in a stacked state, a plurality of product rows in which the products (M) (M) are arranged in a line in the longitudinal direction are arranged in parallel on the left and right. Will be things. And the product (M)
After the first welding step of welding both side edge portions of the strip-shaped sheet (1) (1) on which (M) is arranged, the scrap portion on the outer edge of the welded portion of both side edge portions is cut off. The trimming process is performed. Thereby, the both side edge portions are finished.

Further, simultaneously with or after the first welding step, a second welding step of welding the left and right boundary portions parallel to the transfer direction between the products (M) and (M) is executed, and the second welding step is performed. Simultaneously with or after the step, a first dividing step of dividing the left and right boundary portions into right and left is performed. As a result, a plurality of products (M) (M) arranged in parallel on the left and right are separately packaged.

Further, at the same time as or after the first welding step, a third welding step of welding the front and rear boundary portions of the product (M) and the product (M) behind the product (M) is executed. This third welding step At the same time as or after that, a second dividing step of dividing the front and rear boundary portions into front and rear is performed. As a result, the products (M) and (M) in each of the above-described product rows lined up front and back are separately packaged.

Through the above steps, the strip sheets (1) (1)
Each product (M) is packaged in such a manner that each product (M) is contained in a bag body that is divided into front, rear, left, and right. In this one, a plurality of product rows in which the products (M) and (M) are arranged side by side in the longitudinal direction between the strip-shaped sheets (1) and (1) in the superposed state are arranged in parallel between these product rows. Since the strip-shaped sheet (1) (1) is welded and divided, the number of products (M) (M) to be packaged per one transfer pitch of the products (M) (M) is already described. It is several times more than the conventional one.

Here, as in the second aspect of the invention, in the case where "the first and second dividing steps are executed after the trimming step", when the trimming step is executed,
The first and second dividing steps are not yet executed, and the strip-shaped sheets (1) (1) are not divided into front and rear or left and right. Further, in the invention in which “the second dividing step is executed after the first dividing step” as in the invention of claim 3, the second dividing step is not yet performed when the first dividing step is executed. It is not executed, and the strip-shaped sheets (1) (1) are not divided into front and rear.

[0013]

As described above, according to the invention of claim 1, even if the traveling speed of the belt-shaped sheets (1) and (1) is about the same as the conventional one described above, the product (M) Since the number of packages of the product (M) (M) per transfer pitch of the product (M) is a multiple of that of the conventional product, the packaging speed of the product (M) (M) is higher than that of the conventional product. It will be significantly faster.

Further, the scrap portion generated at the welded portions at the both side edge portions of the strip-shaped sheets (1) (1) is the same as the conventional one.
It is removed by the trimming process, and the removal amount is the same as the conventional one. However, between the both end edges, the products (M) (M) are arranged side by side, and between the left and right products (M) (M), the upper and lower strip-shaped sheets (1) (1) are indispensable. Since the trimming process is not required, the product (M)
The amount of film removed per package is smaller than that of the conventional one.

According to the second aspect of the present invention, during the trimming step, the belt-shaped sheets (1) (1) are not divided into front and rear or left and right, so that the running posture thereof is stable. This allows
Both side edge portions of the strip-shaped sheet (1) (1) are less likely to be displaced with respect to the trimming blade, and the both side edge portions are finished well. In the invention of claim 3, since the strip-shaped sheet (1) (1) is not divided into front and rear during the first dividing step, the strip-shaped sheet (1) (1) in the first dividing step is The left-right division is continuously performed, and the efficiency of the first division step is improved. Further, during the first dividing step, the running postures of the belt-shaped sheets (1) and (1) are stabilized, so that the right-and-left division is ensured.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
This will be described with reference to the drawings. As shown in FIGS. 1 and 2, this embodiment is carried out for packaging the compact disc as the flat product (M) described above. The above-mentioned strip-shaped sheets (1) and (1) used for this packaging are transparent synthetic resin films, and are initially wound in a roll shape. Then, these roll-shaped strip-shaped sheets (1) (1) are supported substantially vertically in parallel, and a plurality of roller devices (R) (R)
And are intermittently run in the longitudinal direction and are superposed on a substantially horizontal transfer path.

The running path of the lower strip-shaped sheet (1) is set so as to be substantially horizontal immediately after it is pulled out, and this upper portion of the upper strip-shaped sheet (1) is joined so as to join in the middle thereof. The traveling route of the belt-shaped sheet (1) is set. The product (M) is placed on the lower strip-shaped sheet (1) on the upstream side of the confluence point with the upper strip-shaped sheet (1) in the traveling path of the lower strip-shaped sheet (1). A supply device (8) is provided for this purpose. This supply device (8) is a stock part (8a) which is arranged on the side of the lower strip-shaped sheet (1) and holds a large number of products (M) (M) vertically, and a stock part (8a). ), A pair of products (M) (M) are taken out from the lower strip-shaped sheet (1) and placed side by side on the take-out device (8
b).

The take-out device (8b) sucks the outer peripheral side of the central hole of one compact disc (the product (M)) with a plurality of suction cups (not shown) to suck the strip-shaped sheet.
A suction device (not shown) to be placed on (1) is provided, and the mounting position of the product (M) by the suction device is the strip-shaped sheet.
It is aligned with the final position of the product (M) placed on the stock part (8a) side of (1). Further, the take-out device (8b),
Put the product (M) placed in the above-mentioned placement position into the stock part (8a).
A pusher (not shown) is provided for pushing the product (M) to the final position of the product (M) on the opposite side. This pusher is configured so that it does not operate when the next product (M) is placed in the above-mentioned placement position after being pushed to the final position on the opposite side. With these configurations, the pair of products (M) (M) taken out from the stock section (8a) are juxtaposed on the left and right of the strip-shaped sheet (1).

During the operation of the take-out device (8b), the strip-shaped sheets (1) (1) are in a traveling stopped state,
After (M) and (M) are juxtaposed, the vehicle starts traveling again. or,
On the downstream side of the confluence, a welding device (2) for welding both side edge portions of the belt-shaped sheets (1) (1) in the superposed state.
And a cutting device for cutting the scrap part of the welding area
(3), a first fusing device (4) for fusing the left and right central portions of the band-shaped sheets (1) (1) along the traveling direction, and the band-shaped sheet
(1) The product (M) in (1) and the product (M) behind it
A second fusing device (5) for fusing between and is provided in this order from the upstream side. Known devices are used as these devices.

In this case, a pair of products (M) (M) on the left and right on the lower strip-shaped sheet (1) pulled out by the roller device (R) (R) is moved by the take-out device (8b) to Side by side. Then, since the juxtaposition operation of the take-out device (8b) is repeated at a predetermined time interval, on the lower strip-shaped sheet (1), the products (M) (M) in a row in the running direction. A pair of aligned product rows are arranged in parallel on the left and right. Then, these products (M) and (M) are sandwiched between the product and the strip-shaped sheet (1) located on the downstream side of the confluence.

Then, both side edge portions of the upper and lower strip-shaped sheets (1) and (1) are welded with a predetermined width by the welding device (2). As in the conventional case, the width of the welding area (100) is set to be sufficiently larger than the maximum amount of deviation in the width direction due to variations in the running state of the belt-shaped sheets (1) and (1) as shown in FIG. There is. This welding step is the first welding step described in claim 1.

As a result of this welding, the scrap portions (110) formed by overheating and melting without overlapping the upper and lower strip-shaped sheets (1) (1) are formed at the outer edges of the welded portions at the both side edge portions. By the cutting device (3), the both side edge portions are cut with a constant width, and the cutting width is set to be slightly larger than the maximum deviation amount. Therefore, as shown in FIG. The (110) is removed, and the both side edge portions are finished. This step is the trimming step described in claim 1.

Thereafter, the first fusing device (4) blows the left and right central portions of the strip-shaped sheets (1) (1) after passing through the trimming step along the running direction. As a result, the left and right boundary portions are welded and divided into left and right parts, and the strip-shaped sheets (1) and (1) are divided into left and right parts. The first fusing step is the second fusing step and the first fusing step described in claim 1 above.

Further, after this, the product (M) in the strip-shaped sheets (1) (1) divided into the left and right by the second fusing device (5) and the product (M) behind it. The front and rear boundaries between them are blown. As a result, the front and rear boundary portions are divided into front and rear parts in a welded state, and the left and right strip-shaped sheets are separated.
(1) (1) is divided into front and back. The second fusing step is the third fusing step and the second fusing step described in claim 1 above.

Through the above steps, each product (M) is separately packaged. These packaged products (M) (M) are stacked and held on a lifter (6) arranged on the lower side of the second fusing device (5), and when a predetermined number of sheets are stacked, the lifter (M) 6) It is pushed out onto the conveyor (7) arranged on the lower side of and is discharged to the outside of this packaging device from this conveyor (7).

In this product, a pair of products (M) and (M) are arranged in parallel on the left and right sides of the above-mentioned overlapping belt-shaped sheets (1) and (1), and the left and right products (M) and (M) are arranged. In between said strip-shaped sheet
(1) Since (1) is welded and divided, the number of packages of the product (M) (M) per one transfer pitch is double that of the conventional product described above. Further, the trimming step is executed before the first and second fusing steps, and at the time of the trimming step, the running posture of the strip-shaped sheets (1) (1) is not divided into front and rear or left and right. It is stable, and both side edges of the strip-shaped sheets (1) (1) are surely trimmed.

Further, before the second fusing step, the first fusing step is performed.
A fusing step is performed, and at the time of this first fusing step, since the strip sheets (1) (1) are not divided into front and rear, the left and right divisions of the strip sheets (1) (1) are continuously and reliably performed. It will be executed. In addition, each of the above-described fusing steps may be divided into a fusing step and a subsequent cutting step. The welding step in this case is the second and third welding steps described in claim 1 and may be performed after the first welding step. Further, the dividing step is the first and second dividing steps described in claim 1.

Further, the strip-shaped sheets (1) and (1) do not have to be wound in a roll shape, and a rectangular shape having a certain length is intermittently transferred to each of the above-mentioned devices. May be The strip-shaped sheets (1) (1) may be, for example, synthetic fiber cloth as long as they are materials that can be welded. or,
Nonwoven fabric may be used. Further, sheet materials of different materials may be combined and welded.

In the above-described embodiment, the band-shaped sheet
(1) A pair of product rows is supposed to be lined up between (1).
There may be more than one product line.

[Brief description of the drawings]

FIG. 1 is a schematic side view of an apparatus used in an embodiment of the present invention.

FIG. 2 is a plan view of the device.

FIG. 3 is a plan view of the main part of the device.

FIG. 4 is a schematic explanatory view of a conventional packaging process.

FIG. 5 is an explanatory view of a main part of a conventional packaging process.

[Explanation of symbols]

 (1) ・ ・ ・ Striped sheet (M) ・ ・ ・ Product

Claims (3)

[Claims] 1. The strip-shaped sheets (1) (1) in a state in which a flat product (M) is inserted between a pair of upper and lower strip-shaped sheets (1) (1) running in a longitudinal direction in a stacked state. In the method of packaging the product (M) (M) by welding and cutting at a predetermined position, a plurality of the products on the lower strip-shaped sheet (1) of the strip-shaped sheets (1) (1) (M) (M) arranging in the width direction of the strip-shaped sheet (1), and welding both side edge portions of the strip-shaped sheet (1) (1) on which the product (M) (M) is disposed. First welding step to perform, and the strip-shaped sheets (1) (1) welded in the first welding step
And a trimming step for cutting off the scrap portion on the outer edge of the welded portions on both sides, and simultaneously or after the first welding step, the left and right boundary portions parallel to the transfer direction between the products (M) and (M) are welded. A second welding step; a third welding step of welding the front and rear boundary portions of the product (M) and the product (M) behind the same at or after the first welding step; and the second welding step. A packaging method comprising a first dividing step of dividing the left and right boundary portions into right and left portions simultaneously or thereafter, and a second dividing step of dividing the front and rear boundary portions into front and rear portions simultaneously with or after the third welding step. 2. The first and second after the trimming step
The packaging method according to claim 1, wherein the dividing step is performed. 3. The packaging method according to claim 2, wherein the second cutting step is performed after the first cutting step.