JPH1178331A - Filing tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a sheet member to be housed and preserved in a good condition for a long time by joining, through welding, a bag made of transparent film formed from polypropylene to a cover having a jacketing layer formed from polyvinyl chloride. SOLUTION: In this tool, a joining piece 6 formed from polypropylene is held between and wrapped by a jacketing layer 5 formed from polyvinyl chloride of a cover 1 as a core material 4, and a bag 7 formed from polypropylene is joined to the joining piece 6 by welding it thereto from over the jacketing layer 5 using an ultrasonic welding method. The bag 7 has an excellent transparency, is free from deterioration through aging and has a nature to house a sheet member with no concern about adhesion and transfer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filing tool for storing and storing sheet pieces in a transparent bag bound to a cover.

[0002]

2. Description of the Related Art A large number of light-transmitting flexible bags made of synthetic resin are stacked and bound on a hard cover, and are made of papers, memos, cards, photographs, and other materials such as paper and synthetic resin. Filing tools for storing soft or hard thin sheet pieces in bags for storage are well known.

[0003] As a filing tool of this kind, a hard core material made of cardboard is arranged on each of the back cover and the back cover in the case where the number of bags is large and the entire back cover is thick. One of the edges of a bag is welded to the spine of a cover that is wrapped in an outer layer made of a synthetic resin thin-walled sheet, and many bags are stuck together in a stacked state, and then sold on the market. Have been.

[0004] The outer layer is generally made of polyvinyl chloride because it has a soft touch and can be arbitrarily colored to give various color effects and is easy to process. On the other hand, the bags to be welded to the outer layer made of polyvinyl chloride are made of the same polyvinyl chloride because they must be firmly joined.

[0005]

However, since polyvinyl chloride contains a plasticizer as an essential additive, even if a bag is made using a thin film formed by a calendar method, the bag is inferior in transparency and aging. Degradation cannot be avoided. Further, the plasticizer migrates to the film surface over time and the stored sheet piece and the bag become in a bonded state, which makes it difficult to take out the sheet piece,
The printing location of the sheet piece may be transferred to the bag. As a countermeasure, fine irregularities are provided on the bag to prevent adhesion and transfer. Occurs.

According to the conventional filing tool of the present invention, the cover layer of the cover is made of polyvinyl chloride, and a large number of bags for storing the sheet pieces are joined to the cover layer by welding and stapled. Because the bag is made of the same polyvinyl chloride as the outer layer for bonding, the bag is inferior in transparency and inevitable aging as described above. In order to solve the problem, it is necessary to provide a means for preventing the transfer of the image, and the transparency is further reduced.

[0007]

Means for Solving the Problems A core material is arranged on the front cover and the back cover, and these are sandwiched and wrapped in a jacket layer made of polyvinyl chloride. This is a solution to the above-mentioned problem that a filing tool including a large number of light-transmitting flexible synthetic resin bags whose edges are bonded to a cover by bonding and binding is provided as follows. .

According to the present invention, the cover layer of the cover is wrapped with the joint piece made of polypropylene and the bag is made of a transparent film of polypropylene, and the bag is joined to the joint piece by ultrasonic welding. Have been.

In the ultrasonic welding method, an object to be welded is sandwiched between welding tips, and vibration energy is applied to one of the welding tips to vibrate laterally, thereby destroying a film on a contact surface and causing local vibration. Known as a welding method that performs welding by heat generation, it can be welded in a short time, the joining temperature is low,
It has the advantage that the properties of the joint are hardly impaired compared to the base material.

[0010] In the present invention, the welding tip to which ultrasonic vibration is applied is arranged on the joint of the bag,
The other welding tip for applying pressure is placed under the cover, and welding is generally performed by spot welding or seam welding. At this time, the outer layer between the bag and the joint piece is pressed and pierced in the lateral direction while being melted by the lateral vibration of the welding tip together with the bag, and the surface of the joint piece is melted. . Then, the melted portion of the pressed bag is welded to the fusion surface portion of the joining piece at the edge of the perforated portion, and the bag is joined to the joining piece.

In the present invention, instead of overlapping the bag on the outer layer and welding, the outer layer of the joint is removed in advance, and the bag and the joint piece are ultrasonically welded. In some cases, it is directly welded as it is, and in this case, it is possible to join with high strength.

The joint piece is formed of a core material arranged on the spine or a core material arranged on one or both of the front cover and the back cover. In this case, these cores are each made of a single plate made of polypropylene, or a cardboard and a plate made of polypropylene are stacked.

[0013]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 and FIG. 2 show a first embodiment in which cores 2 and 3 made of a cardboard hard plate are arranged on a front cover and a back cover, and a polypropylene hard cover is provided on a spine. The core members 2, 3, 4 are formed by disposing a core member 4 made of a plate, overlaying a jacket layer 5 made of a thin sheet made of polyvinyl chloride on both surfaces thereof, and bonding their outer peripheral edges to each other by welding. The cover 1 is formed by being sandwiched and wrapped.

The bag 7 for storing sheet pieces such as documents, notes, cards and photographs is made of a transparent polypropylene film. This bag 7 is made by cutting a long bag material continuously formed by an inflation method into predetermined lengths and fusing one of the cut ends, and contains a plasticizer, and is extremely high. It has transparency, and has excellent properties such as deterioration over time, adhesion of stored sheet members, and no transfer of printing locations.

When the cover 1 is opened, the bag material is made to have a width that can be overlapped over almost the entire width thereof.
And the center portion of the back cover is joined to the joining piece 6 which is the core material 4 made of polypropylene by a welding portion 8 by an ultrasonic welding method substantially on the center line. Each of the two bags 7 defined by the welding portion 8 is formed.

The laterally vibrating welding tip melts the edge of the bag 7 and the jacket layer 5 on the joint piece 6 and pushes them laterally, so that the fused portions of the bag 7 are welded to each other and joined together. As described above, the bag 7 is welded to the fusion surface portion of the piece 6, and as a result, the bag 7 is directly welded and joined to the joint piece 6.

FIG. 3 shows a second embodiment.
A core material 4a made of cardboard and a polypropylene core material 4b are superimposed on the spine portion, and the core material 4b is used as the joint piece 9. The bag 7 is joined to the joining piece 9 by the same welding portion 10 as that of the first embodiment.

FIG. 4 shows a third embodiment,
The cover 1 has a front cover and a back cover having cardboard cores 2 and 3 disposed thereon, and a back cover having a polypropylene core 4 disposed therein and wrapped in a polyvinyl chloride covering layer 5. It has the same configuration as one embodiment.

The bag 7 is formed by laminating a large number of bag materials similar to those of the first embodiment, and joining the joint pieces 6 serving as the core material 4 at both side edges thereof by welding portions 11 by ultrasonic welding. I have.

In other words, in this embodiment, different welding portions 1 are provided in which bags 7 distributed to the front cover side and the back cover side are scattered in directions parallel to each other along both side edges of the joining piece 6.
1, since the welded portion 11 holds the bag 7 on one side in a cantilevered manner by being joined to the piece 6 on the joining portion, and holds the bag 7 on both sides. The bag 7 can be stably and firmly held as compared with that of the embodiment.

FIG. 5 shows a fourth embodiment,
Core materials 16 and 17 made of a hard plate made of polypropylene are arranged on the front cover and the back cover, and these are wrapped in a jacket layer 5 made of polyvinyl chloride to form a cover 15. Does not have a core material.

The bag 20 in this embodiment is made substantially the same size as each of the front cover and the back cover.
The edge of the bag 20 overlaid on each spine side is joined to the joint pieces 18 and 19 which are the core members 16 and 17 by welding portions 21 by ultrasonic welding, respectively.

FIG. 6 shows a fifth embodiment,
The same cover 15 and bag 20 as in the fourth embodiment are used, but this is the one in which the edge of the bag 20 laid on the front cover and the back cover on the opposite side to the spine is the core. The joining pieces 18 and 19, which are the members 16 and 17, are joined by welding portions 22 by ultrasonic welding, respectively.

In the fourth and fifth embodiments, the same number of bags 20 are arranged on the front cover side and the back cover side.
In these embodiments, the cores 16 and 17 may be formed by laminating a cardboard core and a polypropylene core.

When at least one of the front cover and the back cover has the joint pieces 18 and 19 as the core members 16 and 17, the bottom of the bag 20 may be joined.

[0026]

As described above, according to the present invention, a joint piece made of polypropylene is disposed as a core material on a cover provided with a cover layer of polyvinyl chloride, and a bag made of a transparent film of polypropylene is used as a joint piece. Since it is bonded by ultrasonic welding to the cover, it has high transparency and does not deteriorate over time. A polypropylene bag that can be stored without worrying about transfer is firmly joined and bound, and the sheet member can be stored and stored in a good state for a long time.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention.

FIG. 2 is an enlarged partial view of FIG. 1;

FIG. 3 is a partial longitudinal sectional view showing a second embodiment of the present invention.

FIG. 4 is a longitudinal sectional view showing a third embodiment of the present invention.

FIG. 5 is a longitudinal sectional view showing a fourth embodiment of the present invention.

FIG. 6 is a longitudinal sectional view showing a fifth embodiment of the present invention.

[Description of Signs] 1,15 cover, 2,3,4,4a, 4b, 16,1
7 core material, 5 outer layer, 6, 9, 18, 19 joint piece, 7, 20 bag, 10, 11, 21, 22 welding part,

Claims (3)

[Claims] 1. A cover in which a core material is disposed on a front cover and a back cover, which is sandwiched and wrapped in a covering layer made of polyvinyl chloride, and one edge portion of which is overlapped with each other and one edge portion thereof is formed on the cover. A filing tool comprising a number of light-transmitting flexible synthetic resin bags joined and welded together by welding, wherein the cover has a polypropylene binding piece wrapped in the outer layer and A filing tool, wherein the bag is made of a transparent film made of polypropylene, and the bag is joined to the connecting piece by ultrasonic welding. 2. The filing tool according to claim 1, wherein the cover has a joint piece made of polypropylene as a core material of a spine, and the bag is joined to the joint piece. A filing tool characterized by the following. 3. The filing tool according to claim 1, further comprising: a joining piece made of polypropylene as a core material of at least one of the front cover and the back cover, wherein the bag is attached to the joining piece. A filing tool, which is joined.