JPH0730481Y2 - Half-fold film opening guide device - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The present invention relates to a half-folded film opening guide device for folding a half-folded film to wrap an article to be packaged.

[Prior art]

Conventionally, as an opening device for a double-folded film of this type, for example, as seen in the invention of the device for opening a double-folded film in an article packaging device of Japanese Utility Model Publication No. 60-20567, that article is placed in the transfer path of the article to be packaged. A film opening device consisting of a pair of upper and lower guide plates that pass through the gap and a sealing device following it are provided, a bi-fold film feeding device is provided next to the film opening device, and an article inlet of the film opening device is folded in two. In the article wrapping apparatus using a double-folded film in which the entrance edges of both guide plates are inclined at substantially the same angle with respect to the feeding direction of the film and the transport direction of the article, In the transfer path of, the primary belt conveyor from the rear of the film opening device to the front sealing device, and the secondary belt conveyor following it are provided, The upper and lower guide plates of the film opening device,
While opposing to sandwich the primary belt conveyor between them, a space is provided between the primary belt conveyor and the upper guide plate for the article and the opening film upper piece to pass, and between the primary belt conveyor and the lower guide plate and the article. A horizontal piece of the seal receiving stand of the sealing device is provided between the primary and secondary belt conveyors so that a space through which the lower piece of the opening film passes is provided, and a fusing and welding portion can be formed at the leading edge of the opened film for each seal of the article. There is known a known technique in which the film is drawn out from the outlet of the opening device by placing the transfer article on the fusing and welding portion at the tip of the film. However, in the above structure, the guide plate is a plate having a triangular horizontal surface, and the half-folded film fed out is opened by the end portion of the guide plate in the same width as the vertical width at the time of folding, so that the guide plate is There is no guide to contact with. Therefore, when static electricity is generated between the half-folded film surfaces, there is a drawback that the guide plate cannot be smoothly reversed and the frictional resistance is increased, or the film is caught and deviated. Further, in the conventional configuration, since the guide plates made of triangular plates are installed vertically apart from each other, the spaces between them are hollow, and the center continuous side of the film after the half-folded film is folded back is not guided. Therefore, there is a drawback that the inversion is not performed smoothly. Therefore, a configuration is known in which a half-folded film is folded back by using a substantially U-shaped laterally-folded rod member in which upper and lower folded portions are connected, but this has a drawback that the height cannot be adjusted according to the article to be packaged. .

[Problems to be solved by the device]

This invention was created as a result of earnest research in view of the above circumstances, and its main problem is to smoothly fold the half-folded film and reduce the resistance of the film when packaging the article to be packaged. Another object of the present invention is to provide a highly reliable half-folded film opening guide device capable of improving the packaging efficiency and the packaging finish.

[Means for solving problems]

In order to solve the above problems, the invention has a pair of upper and lower height-adjustable edges for transferring articles to be packaged so that the articles can pass through, and has an inversion edge that obliquely crosses the transfer path. An opening guide device for the half-folded film is arranged, a sealing device is provided behind the opening guide device, a two-fold film feeding device is arranged beside the opening guide device, and the article inlet side of the opening guide device is folded in two. An opening guide device for a half-folded film, which is opened obliquely in the direction opposite to the film feeding device, and the reversing edge of the opening guide device is inclined at substantially the same angle with respect to the film feeding direction and the article transfer direction. In the above, a half-folded film opening guide device vertically expands and contracts a pair of upper and lower reversing guide members and a pair of the reversing guide members on the film feeding side end. A folding member which is connected to the front end of the pair of lower and upper reversing guide members connected to each other and extends linearly and is bent at the center of the half-folded film in the direction in which the film is drawn toward the feeding device. The technical means is provided to extend along the inside of the side and to pivotally attach the respective base ends to the lead-out guide member which is formed in a laterally V-shape toward the reverse guide member.

[Action]

Before the half-folded film is guided by the reversing guide member, the half-folding film fed out from the lateral direction of the conveyor is formed into a V-shape so that the bending side of the half-folding film is gradually widened toward the reversing guide member by the lead-out guide member. Since the film is opened and guided to the reversing guide means, the film can be guided to the reversing guide member while preventing the half-folded film from sticking. Further, since a stretchable member is linearly provided at the end of the pair of reversing guide members which are vertically separated with the conveyor interposed therebetween on the film feeding side, the fed half-folded film has a pair of upper and lower reversing guide members. When the film is reversed at the reversing edge, it is possible to smoothly open the film by guiding the center continuous side where the bent side of the film is reversed.

【Example】

Below, the half-folded film opening guide device of this invention is
An embodiment relating to the case of being used for a sealer packaging device will be described with reference to the drawings. The opening guide device for a half-folded film shown in FIG. 1 is a feed side transport path 1 for transporting an article to be packaged to a sealing device (not shown).
It is installed in. The supply-side transport path 1 is composed of a belt conveyor in this embodiment, but may be any conveyor means such as a roller conveyor, a structure in which an arm is used to transfer articles to be packaged on a fixed table. Of course, it does not matter what kind. As shown in FIG. 2, a roll film feeding device 4 is provided on the side of the midway portion of the supply side transport path 1,
In front of the feeding device 4, a semi-folded film opening guide device 10 of the present invention is provided. The opening guide device 10 for the half-folded film is composed of a lead-out guide member 6 for opening the bending side f1 of the half-folded film fed from the feeding device 4 and a reversing guide member 5 for reversing the opened folding side. ing. Here, the lead-out guide member 6 pivotally attaches P1 (see FIG. 5) to the base ends of the pair of upper and lower rods 6A and 6B made of a straight pipe,
The tip ends are constructed by pivoting P2 (see FIG. 6) to the ends of the upper and lower rods 5A and 5B, which will be described later, on the side where the elastic member 8 is connected. The lead-out guide member 6 is arranged so that its extension direction coincides with the film pull-out direction. As a result, the lead-out guide member 6 is also displaced in accordance with the vertical movement of the reversing guide member 5, and the bent side f1 of the film can be opened in conformity with the upper and lower rod portions 5A and 5B of the reversing guide member 5. Next, in the case of the present embodiment, the reversing guide member 5 to which the lead-out guide member 6 is connected is separated from above the supply side transport path 1 by an upper rod portion 5A which forms an upper reversing edge portion 7A. The lower rod portion 5B forming a lower reversing edge portion 7B which is parallel to and spaced apart from the hanging position, and the elastic member 8 which is elastically connected to the upper and lower rod portions 5A and 5B. This inversion guide member 5 is provided with a pair of transfer frames 12A, 12B that are vertically moved up and down by a height adjusting device 11 and an upper rod portion 5A.
And the base end of the lower rod portion 5B is fixed. In the case of the illustrated example, the upper and lower rods 5A, 5B are hollow pipes whose tips are bent substantially vertically, and a plurality of fumaroles H, H ... . The upper and lower rods 5A and 5B are connected at their base ends to the air supply device A having a predetermined pressure, and the other end is closed by a plug 12 as shown in FIG. Therefore, the supplied constant pressure air is the pipe-shaped rod 5A,
It blows out from the fumarole H at a predetermined pressure through the hollow part of 5B,
A gap is formed with the half-folded film f drawn in the direction of the arrow in FIG. 3, and the film flows out in the direction of the arrow. Here, the air supply device may be any device that supplies air at a constant pressure, and for example, a blower having a known structure such as a structure in which a compressor and a regulator are connected can be appropriately used. An upper transfer frame 12A of the transfer frames 12A and 12B is vertically movable by a height adjusting device 11. Here, the height adjusting device 11 rotates the rotating shaft 11 by rotating a handle 11H formed at the tip of the rotating shaft 11A provided with a screw protruding laterally, and through a guide shaft 11B composed of a spline shaft. Although it is vertically moved up and down, other known height adjusting means may be used. In the case of the present embodiment, as shown in FIG. 2, the half-folded film feeding device 4 is fed from a direction orthogonal to the feeding direction of the feed side feeding path 1, so that the upper and lower rod portions having the reversing edge portion are provided. 5A and 5B are arranged so as to intersect the supply side transport path 1 at an angle of 45 degrees. Next, a coil spring is used in this embodiment as the elastic member 8 interposed between the upper and lower rod portions 6 and 7. The coil spring 8 can adjust the distance between the upper and lower rods 5A and 5B, and can maintain the tension of the upper and lower rods 5A and 5B by its elastic force. That is, if the distance between the upper and lower rods 5A and 5B is increased, a large load is applied accordingly when the half-folded film F is inverted,
By the tension of this coil spring 8, the upper and lower rods 5A,
5B is held in place so that the half-folded film can be turned over. Further, the elastic member 8 is not limited to the above-mentioned embodiment, and for example, a telescopic type elastic rod may be used and the upper and lower ends thereof may be connected to the upper and lower rod portions 6 and 7. In short, here the elastic member can expand and contract up and down,
Further, any structure may be used as long as the outer periphery thereof is guided or abutted against or restrained with the central continuous portion of the half-folded film. In order to use the opening guide adjustment 10 for the half-folded film, the roll of the half-folded film F is set in the feeding device 4 sideways with respect to the supply-side transport path 1. Then, the bending side f1 of the half-folded film f drawn out from the film roll is opened vertically by the guide member 6, and then the opened upper piece f2 is applied onto the upper rod portion 5A and the lower piece
While inserting f3 under the lower rod 5B,
f2 ′ and f3 ′ are respectively the upper and lower rods 5A and 5B for reversing edges 7A,
Fold it back at 7B, turn it inward, and open it in the open state. Since the supply-side transport path 1 is inserted in the hollow of the opened half-folded film F, the article to be packaged G
Is placed on the supply-side transport path 1 and inserted into the open half-fold film f without any constraint. One end of the opened half-folded film f is fused and welded in advance in an L shape by the sealing device 3 (from the second time, the leading end is always closed by the fusion welding for packaging the article G conveyed immediately before. The closed portion is caught by the moving packaged article G and the half-folded film F is
Will be pulled out from the feeding device 4. The drawn film is sequentially opened by the upper and lower rods 5A and 5B, and the fumaroles H, H, ...
As a result, a slight gap is formed between the upper and lower rods to bring them into a non-contact state or a state in which they are brought into contact with each other with an extremely weak force, and the mouth is smoothly opened and pulled out. Further, since the upper and lower rods 5A and 5B can maintain a certain tension by the coil spring, when the half-folded film F is folded back, the bent side f1 is inverted to become the central continuous side and becomes the outer periphery of the coil spring. Thus, it is possible to effectively prevent the film F from being rolled up or displaced when being guided or restrained by and passing through the tip corner portions of the upper and lower rod portions 5A and 5B. The inversion guide edge portion of the present invention may be provided on a conventional triangular plate-shaped or frame-shaped guide plate or guide body, which is limited to a pipe or rod shape as in the present embodiment, and any of these may be used. Is also included in the technical scope of this invention. Reference numeral 20 in the drawing denotes an auxiliary guide rod, which is fixedly attached (fixed in different steps in the illustrated example) to the base end of the upper rod portion 5A of the reversing guide member 5 and traverses the feed side transport path 1 at a right angle. Is extended. By providing this auxiliary, it is possible to hold the inverted half-folded film, which is guided by the reversing guide member 5 and then pulled out and descends on the supply side transport path 1, substantially horizontally. In addition, an auxiliary rod may be provided which is connected to the upper rod portion and extends parallel to the supply-side transport path, or an auxiliary rod may be provided at an appropriate position in relation to this.

[Effect of device]

Since the present invention has the above-mentioned structure, the folding guide portion of the half-folded film can be smoothly opened by using the lead-out guide member, and can be easily inverted by the reversal guide member to be wrapped with the half-folded film. It is possible to prevent wrapping and deviation of a highly reliable half-folded film that can reduce the resistance of the film when packaging the article to improve the packaging efficiency and enhance the finish of the packaging. Also, because the elastic member is provided at the end of the reversing guide member,
Since it is possible to smoothly invert the central continuous part that is the folding back of the folded side of the opened half-folded film and similarly it is possible to prevent the half-folded film from being rolled up or displaced at the time of reversing, it is extremely Efficient packaging work can be performed.

[Brief description of drawings]

FIG. 1 is a perspective view showing an essential part of a half-folded film opening guide device of the present invention, FIG. 2 is a plan view showing a packaging device of an embodiment, and FIG. 3 is a half-folded film opening state. FIG. 4 is a partial cross-sectional view showing an example of a connecting structure of elastic members, FIG. 5 is a partial perspective view showing pivotal attachment of a lead-out guide member on the proximal end side, and FIG. 6 is a pivotal diagram on the proximal end side. It is a partial perspective view which shows a garment. 1 …… Supply side conveyance path 3 …… Seal device 5 …… Reversal guide member 6 …… Derivation guide member 8 …… Expansion member 10 …… Opening guide device F …… Semi-folded film F1 …… Bending side G …… Items to be packaged

Claims (2)

[Scope of utility model registration request] 1. An opening guide for a half-folded film, which is provided in a transfer path of articles to be packaged in such a manner that the height of the articles can be adjusted so as to pass through them and has a reversing edge portion which obliquely crosses the transfer path. A device is arranged, a sealing device is provided at the rear of the opening guide device, a bi-fold film feeding device is arranged beside the opening guide device, and the article inlet side of the opening guide device is opposite to the bi-fold film feeding device. In the opening guide device for a half-folded film, the opening guide device is opened diagonally, and the reversing edge portion of the opening guide device is inclined at substantially the same angle with respect to the film feeding direction and the article transfer direction. The opening guide device is provided with a pair of upper and lower reversal guide members and end portions of the pair of reversal guide members on the film feeding side, which are vertically expandable and contractible and extend linearly. The elastic member and the tip of the pair of upper and lower reversing guide members are connected to each other and extend along the inside of the bent side bent at the center of the half-folded film in the direction in which the film is drawn toward the feeding device. An opening guide device for a half-folded film, which has a lead-out guide member that is pivotally attached to the base end of the guide member and is formed in a laterally V-shape toward the reverse guide member. 2. The half-folded film opening guide device according to claim 1, wherein the elastic member comprises a coil spring.