JP2557370Y2 - Antistatic guide device for packaging sheets in a packaging machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a relatively small packaging machine which uses a continuous wrapping material sheet of a required width, folds this sheet in the flow direction and wraps the object to be wrapped while packaging the object. The present invention relates to an antistatic guide device for a packaging sheet.

[0002]

2. Description of the Related Art For example, in a medicine packaging machine in which powdered or granular medicines and tablets are divided into single doses based on a prescription and packaged, powdered medicines and tablet medicines to be packaged are divided by a required amount. Then, a continuous medicine packaging paper (for example, glassine paper with polyethylene laminated on the inner surface side) is supplied to be folded in two, and then successively made into small bags sequentially from the forward direction, and the heat for forming and packaging the bags. The divided medicine is charged into a bag-shaped partitioning portion at a position before the seal roller portion, and then sealed by a heat seal roller.

In order to correctly fold the continuous medicine packaging paper (packaging sheet) in the moving direction, a guide device for bending the medicine packaging paper so that the medicine packaging paper is gradually and correctly folded is used. A conventional example thereof is known, for example, from Japanese Patent Publication No. 52-17470.

[0004]

In the packaging sheet (medical wrapping paper) of this conventional packaging machine, when a medicine, especially a fine powder medicine, is divided and packaged, it is wound on a roll 3a as shown in FIG. When the packaging sheet 3 having the required width is continuously fed out and divided into bags while being made into a bag, the packaging sheet 3 is folded through the U-shaped slot in order to fold the packaging sheet 3 in the flow direction. First, it is curved into a U-shape so that both ends are aligned, and is guided to the heat seal roller 7 as it is to perform vertical sealing of the continuous packaging bag 8 serving as a partition and horizontal sealing of the opening.

[0005] For this purpose, the packaging sheet 3 is guided by passing through the U-shaped slot 5a by the guide device 5 having the U-shaped slot 5a. Since the transfer is made to the receiving portion 6, the space between the guide device 5 and the heat seal roller 7 must be widened to smoothly move the packaging sheet 3 and the space of the portion must be widened. Must. Therefore, it becomes an obstacle to downsizing the packaging part as a whole. In addition, generation of static electricity due to contact friction between the inner wall of the slot 5a and the packaging sheet 3 when passing through the inside of the U-shaped slot 5a is inevitable.

[0006] If the static electricity generated until the packaging sheet 3 reaches the bag making position is transferred to the package receiving section 6 in a charged state, the package is, for example, a fine powder powder. When it is thrown in from the hopper 1, a part thereof scatters and adheres to the inner edge of the upper end of the packaging sheet 3 before the bag is made, and is transferred to the heat seal roller 7 as it is. Since the heat sealing roller 7 performs heat sealing with fine powder attached to the upper edge of the opening of the packaging bag, complete sealing may not be performed. In addition, the generated static electricity has an adverse effect on electronic components used for control in a portion in contact with the packaged and packaged products, causing malfunctions, and taking measures to increase the product cost. In addition, there is also a method of folding the packaging sheet in two using a triangular guide plate,
In this case, there is the same problem as described above.

[0007] Such a problem of the generation of static electricity becomes more conspicuous when the packaging speed of the packaging machine is to be increased.
Therefore, in order to improve the packaging speed, it is important to remove static electricity.

Therefore, in the present invention, in order to solve such a problem, a static electricity removing plate having a conductive function is provided from the back side of the packaging sheet with respect to the triangular shape of the folding sheet of the packaging sheet. An object of the present invention is to provide an antistatic guide device for a packaging sheet in a packaging machine having a configuration in which static electricity charged on the packaging sheet can be positively eliminated by contacting the packaging sheet.

[0009]

In order to achieve the above object, the present invention relates to a method of producing a packaging sheet having a required width which is rolled in a packaging machine, fed out, folded in two, and made into a bag by a heat seal roller. In the guide device for a packaging sheet provided between the heat-seal rollers, a base end portion is pivotally supported by a piece fixed to the machine body side, facing a triangular metal guide plate disposed at a position before the heat seal roller. Alternatively, a static electricity removing plate which is detachably supported and abuts on the packaging sheet guide surface of the guide plate is provided, and the static electricity removing plate is provided with a conductive pad having an appropriate thickness of cushioning made of conductive fiber on the surface of the substrate. It is configured so as to be attached and to be pressed against a packaging sheet moved along the packaging sheet guide surface of the guide plate during operation.

[0010]

According to the present invention having the above-described structure, when the roll-wrapped packaging sheet having the required width is fed out, folded in two, and sent to the heat seal roller portion, the packaging sheet guide surface of the guide plate of the guide device can be used. Even if static electricity is generated on the packaging sheet surface due to the contact friction, the conductive pad made of the conductive fibers of the static electricity removing plate is pressed against the packaging sheet guide surface, and the static electricity charged by the substrate to which the conductive pad is attached is applied. Is removed from the base end by a ground fault or electric discharge via the body attachment portion, so that the space for folding the guide sheet of the packaging sheet can be reduced, and the packaging sheet is not charged. Also, there is no effect on the control unit during the movement of the package.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a main part of a packaging unit of a medicine packaging machine provided with a packaging sheet guide device of the present invention. FIG. 2 is a front view of the static electricity removing plate incorporated in the guide device of the present invention. FIG. 3 is a rear view of FIG. FIG. 4 is a central longitudinal sectional view of FIG.

In the medicine dividing section of the packaging machine (not shown in FIG. 1), the medicine divided into required amounts is put into the hopper 1 in a predetermined order, and is folded into two from its outlet 1 'to form a bag. A pair of heat-seal rollers 7 and a supporting frame 7A, which are put into the inside of a certain packaging sheet 30 and which are sealed one by one by rotating once in a well-known configuration below the medicine feeding position. Is arranged. Reference numeral 7B denotes a drive unit of the heat seal roller 7.
The packaging sheet 30 having a predetermined width to be supplied to the bag making section by such a pair of heat seal rollers 7 and the charging section of the article to be packaged (medicine) in front thereof is rolled (not shown). Tension bar 4, which is rotatably supported at an appropriate position on the body and guides it by applying tension at, for example, two places along the way.
Guide device 10 arranged to be folded in two by 5
Through the heat seal roller 7 pair. Before this, the medicine to be packaged is received as described above, and the medicine is sequentially packaged and sent out.

The packaging sheet guide apparatus 10 has a triangular metal guide plate 11 supported by a mounting bracket 12 projecting laterally from an unillustrated body. The lower end of the guide plate 11 is shown in FIG. So as to be located near the pair of heat seal rollers 7. In the center of the lower surface of the guide plate 11, an auxiliary guide piece 13 whose base is pivotally supported by a support piece 14 is attached, and a bent portion of the packaging sheet 30 which is folded in two by the tip of the auxiliary guide piece 13 is provided. Is to be determined.

The packaging sheet guide surface of such a guide plate 11
A static electricity removing plate 15 is provided so as to face 11a. As shown in FIGS. 1 to 4, the static electricity removing plate 15 has a conductive pad 16 having a substantially triangular shape similar to that of the guide plate 11, and has the conductive pad 16 adhered to one side.
And a substrate 17 formed of a conductive metal plate (for example, a copper alloy, aluminum, a steel plate, or the like) supported so as to be in contact with the entire surface of the packaging sheet guide surface 11a. The base plate 17 is formed by bending a base end portion 17a at a required angle, and for example, a piece of a butterfly plate 18 is attached to the base end portion 17a. The conductive pads 16 of the static elimination plate 15 are formed so as to be maintained along the packaging sheet guide surface 11a of the guide plate 11 when the packaging sheet 30 is supplied by being fixed to the upper surface.

The base portion 17a is not limited to the above-mentioned structure, but is provided with a projecting piece previously provided on a support portion (in this embodiment, on the support frame 7A of the heat seal roller 7). It may be a structure that is pivotally connected so that it can be turned upside down by being connected with a pin. Alternatively, although not shown, for example, a plug-in type structure is provided at the base end portion, and when the packaging sheet is mounted on the guide plate portion, a static electricity removing plate can be attached later.

The conductive pad 16 may be integrally formed by laminating a plurality of fluffy cloths using conductive fibers (a synthetic synthetic fiber impregnated with copper ions).
Alternatively, a felt-like material having a relatively large thickness and having cushioning properties is attached to the substrate 17. When the conductive pad 16 is attached to the substrate 17, it is preferable that the conductive pad 16 is closely adhered to the substrate 17 so that an insulating layer is not formed between the conductive pad 16 and the substrate 17.

Further, a grounding terminal (not shown) for grounding is provided at a mounting portion between the base end portion 17a of the substrate 17 and the supporting portion (upper surface of the supporting frame 7A) to eliminate electric conduction outside the machine. It is preferable to obtain it. In addition, the substrate 17 of the static electricity removing plate can be formed by plastic in addition to the metal plate.

The static elimination plate 15 having the above-described structure is arranged so that the packaging sheet 30 is passed over the guide plate 11 from the pivotal support 18a at the base end 17a to the packaging position (at the beginning of the operation or when the packaging sheet 30 is moved). 1 is evacuated from the guide plate 11 as shown by a chain line a in FIG. 1 so that the packaging sheet 30 is folded in two in the moving direction along the packaging sheet guide surface 11a of the guide plate 11. Ready to go. During the packaging operation, if the static elimination plate 15 is tilted toward the guide plate side as described above, the center of gravity of the static elimination plate 15 is located ahead of the pivotal support 18a, so that the conductive pad 16 guides the packaging sheet guide of the guide plate 11. The entire surface is pressed with the packaging sheet 30 being fed out and moved to the surface 11a, and even if the packaging sheet 30 is charged with static electricity by contact friction with the guide plate 11, this is immediately transferred from the conductive pad 16 to the substrate 17 through the substrate 17. Discharged outside the machine.

The guide sheet 11 has a packaging sheet guide surface 11a.
Along the conductive pad 16 with respect to the packaging sheet 30 moving along the
Since it has cushioning properties, it does not give excessive resistance and damage the seat surface.

As a result, the inner surface of the packaging sheet 30 being folded in two is not charged with static electricity until it reaches the heat seal roller 7 pair via the guide device 10, so that the medicine to be packaged is a powder. However, the scattered fine powder at the time of feeding is not attached to the upper edge portion of the sheet surface, and the sealing by the heat seal roller 7 can be reliably performed.

According to the gist of the present invention, the static elimination plate 15
As shown in FIG.
A hole 17b may be provided in the back surface of the mounting portion to secure the entire periphery. As the substrate 17B, FIG.
The support frame 7 is bent by bending the base end portion 17c as shown by.
The same effect as that of the above embodiment can be obtained even if it is made to float from the upper surface of A. In the figure, other parts having the same configuration as those of the above-described embodiment are denoted by the same reference numerals.

[0022]

According to the present invention, as described above, in the guide device for folding the packaging sheet in half, the space in the guide section can be reduced, and the static electricity generated due to the movement of the packaging sheet can be generated on the spot. Immediately removing the static electricity allows the packaged product to be packaged without any influence, thereby enabling reliable packaging. In addition, the influence of the static electricity on the control unit can be eliminated, and it is possible to prevent a failure in the operation of the packaging machine.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part of a packaging section of a medicine packaging machine having an antistatic guide device for a packaging sheet according to an embodiment of the present invention.

FIG. 2 is a front view of the static electricity removing plate incorporated in the guide device according to the embodiment of the present invention.

FIG. 3 is a rear view of FIG. 2;

FIG. 4 is a central longitudinal sectional view of FIG. 2;

FIG. 5 is a rear view of another embodiment of the static electricity removing plate.

FIG. 6 is a view showing an embodiment of a mounting portion of a static electricity removing plate according to another embodiment of the present invention.

FIG. 7 is a view showing a mode of supplying a packaging sheet to a bag making and packaging unit in a conventional packaging machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hopper 1 'Discharge port 7 Heat seal roller 7A Support frame 10 Guide device 11 Guide plate 11a Packaging sheet guide surface of guide plate 13 Auxiliary guide piece 15 Static electricity removal plate 16 Conductive pad 17, 17A Substrate 17a, 17c Base end of substrate 18 Butterfly plate 18a Pivot 30 Packaging sheet

Claims (1)

(57) [Scope of request for utility model registration] 1. A packaging sheet guide device provided between a roll of a packaging sheet having a required width to be rolled out in a packaging machine, folded in two, and formed into a bag by a heat sealing roller. The package sheet guide surface of the guide plate is supported at a base end portion thereof, which is pivotally or detachably supported by a piece fixed to the body side, facing a triangular metal guide plate disposed at a position before the roller. The static electricity removing plate is provided in contact with a conductive pad having an appropriate thickness made of conductive fibers and having a cushioning property, and the static electricity removing plate is attached to the packaging sheet guide surface of the guide plate during operation. An antistatic guide device for a packaging sheet in a packaging machine, wherein the packaging sheet is arranged so as to be pressed against the packaging sheet moved along.