JP3931914B2 - Paper bundle binding tool - Google Patents

Description

  The present invention relates to a binding tool that can collectively organize and store a plurality of paper bundles.

Conventionally, when binding a plurality of sheets of paper, such as a document, one member forms a portion that sandwiches a bundle of paper (Patent Document 1 and Patent Document 2), or two or more members such as a binding pin and a fitting ring A paper bundle (Patent Document 3) that holds a paper bundle between these members is known.
In addition to metallic materials, synthetic resins such as polyvinyl chloride resin, polyethylene resin, polypropylene resin, polyacetal resin, PET resin, AS resin, ABS resin, and polyamide resin are also known.
Japanese Utility Model Publication No. 04-038472 Japanese Utility Model Publication No. 04-029074 JP-A-62-218197

  While responding to environmental issues such as forest protection, reusing paper used in documents as recycled paper has attracted attention. However, if a bundle of paper sheets using the above-described conventional binding tool is no longer needed, it cannot be processed as recycled paper as it is. In order to process these papers into recycled paper, all the binding tools must be removed once to make only paper as waste, which is very troublesome. In addition, in many cases, the removed binding tool cannot be used to bind other necessary documents, becomes waste as it is, and causes an increase in waste that cannot be returned to the environment. Met.

The present invention comprises a polyvinyl alcohol resin, one or a mixture of two or more selected from a vinyl acetate unit having a saponification degree of 45 mol% or more and 98 mol% or less and a binary copolymer of vinyl alcohol units. It has at least a binding pin that has a collar part and has an inner hole that opens at the other end, and a stop pin that has a collar part that is press-fitted into the inner hole, and adds moisture to the surface that contacts the paper or the members. it allows the paper bundle binding device to grant viscosity on the surface with the first aspect. Further, it comprises a polyvinyl alcohol resin, one or a mixture of two or more selected from a vinyl acetate unit having a saponification degree of 45 mol% or more and 98 mol% or less and a binary copolymer of vinyl alcohol units, and is in a U shape. By forming a slit as a hole part of the paper, a base part and a piece part are formed as a part for sandwiching the paper bundle, and moisture is added to the surface in contact with the paper, thereby imparting viscosity to the surface. The binding tool is a second gist.

When binding a paper bundle, wipe the surface with a sponge containing water, cloth, paper, etc., add a small amount of moisture to give the binding tool a viscosity, and join the binding tool to the paper bundle or wear it at one end. It is also possible to make the fitting between the binding pin having the portion and the inner hole opened at the other end and the stop pin having the flange portion press-fitted into the inner hole more reliable. In addition, since it can be completely dissolved in water, it is not necessary to remove the binding tool from the continuous-stitched documents, and the paper bundle can be processed into recycled paper as it is, allowing easy reuse of paper. It can contribute to.
Incidentally, a polyvinyl alcohol resin, a synthetic resin in which one or two or more kinds selected from a binary copolymer of vinyl acetate units and vinyl alcohol units having a saponification degree of 45 mol% or more and 98 mol% or less are mixed with water or hot water The effect on activated sludge when dissolved in an alkaline solution is that BOD (Biochemical Oxygen demand, biochemical oxygen demand) is 80 ppm or less and COD (Chemical Oxygen demand, chemical oxygen demand) is 2000 ppm or less.

  The paper bundle binding tool of the present invention is particularly configured at least from a binding pin having a collar portion at one end and having a medium hole opened at the other end, and a stop pin having a collar portion press-fitted into the medium hole. This is preferable in the case of a paper bundle binding tool or a paper bundle binding tool in which a slit as a U-shaped hole portion is formed to form a base portion and a piece portion as a portion for sandwiching the paper bundle. The material used is a polyvinyl alcohol resin, a synthetic resin in which one or two or more types selected from a binary copolymer of vinyl acetate units and vinyl alcohol units having a saponification degree of 45 mol% to 98 mol% are used. By doing so, it is not necessary to remove the binding tool from the continuous document, it can be processed to recycle the paper bundle bound as it is, can easily contribute to paper reuse, The surface adheres to the paper by moisture, and a strong continuous binding of documents can be achieved.

An example will be described based on the drawings. Note that basically the same reference numerals are commonly used for the same parts.
The binding tool A of this example includes a binding pin 2 that is inserted into the binding hole 1 that is perforated in the paper P to be bound, has a collar portion 2a at one end, and a male screw-like portion 2b at the other end, and the binding pin 7 The ring body 3 includes a male thread-like portion 2b and a ring body 3. The ring body 3 is press-fitted and fixed to the male thread-like portion 2b of the binding pin 2 so that the paper P is placed between the collar portion 2a and the ring body 3. A bundle is used for holding and binding.

  Here, the protrusion 4 formed on the male screw-like portion 2b is a spiral continuous unit extending from the vicinity of the flange portion 2a to the vicinity of the tip of the male screw-like portion 2b. This is in consideration of the ease of attaching and detaching. The protrusions 4 may be formed as a plurality of annular protrusions that are formed in an annular shape at regular intervals, instead of being integrated into a spiral. In either case, when the ring body 3 is attached, the ring body 3 is fitted over the protrusion 4.

  Further, the binding pin 2 has a hollow 5 that has an inner hole 5 that opens at the distal end of the male screw-like portion 2b. A stopper pin 6 having a flange 6a is press-fitted into the inner hole 5 so that the male screw-like portion 2b The tip is hidden, and the binding pin 2 is prevented from being deformed and the ring body 3 is fixed securely.

  If it is such, about 50-200 sheets of paper bundles can be bound according to the length of the male screw-like portion 2b of the binding pin 2, but an arbitrary amount of paper is particularly suitable according to the thickness of the paper bundle. A bundle can be bound.

  Here, an inorganic antibacterial agent such as silver, copper, zinc, magnesium, or an oxide thereof or an organic antibacterial agent such as thiazoline or an antifungal agent can be added to the material of the binding tool A at the time of molding. The molded product is preferable for long-term storage.

  The water-soluble resin as described above has a sp value close to the sp value (solubility coefficient) of water and has low crystallinity. Compared to water-insoluble resins, the water-soluble resin described above absorbs water from the surface and gradually repeats the process of “swelling to dissolution” toward the center, so it is softer by adjusting the amount of water. It is less likely to become too much (so-called “waist” does not disappear), and viscosity can be imparted only to the surface. On the other hand, in the case of a water-insoluble resin, since it absorbs water as a whole and swells, it may not be possible to maintain the minimum shape required as a binding tool.

  An example is shown in FIG. The thing of this example was produced by punching out what was formed into a sheet shape, and formed a base 8 and a piece 9 by forming a slit 7 as a U-shaped hole portion. . Paper to be bound can be sandwiched between the base 8 and the piece 9 to form a continuous paper bundle. Here, as in the above example, the binding tool A is selected from polyvinyl alcohol resin, a binary copolymer of vinyl acetate units having a saponification degree of 45 mol% or more and 98 mol% or less and vinyl alcohol units. It is formed from the seed | species or the synthetic resin mixed 2 or more types, and the adhesive effect with a paper surface can be exhibited by applying water to the part which contacts the paper of the binding tool A.

  Table 1 shows the results of testing the above-mentioned polyvinyl alcohol resin, the binary copolymer of vinyl acetate units and vinyl alcohol units at 20 ° C., the moisture content of the resin, the adhesiveness to the paper surface, and the solubility in water. Table 3 shows. In addition, as a paper bundle binding tool, when left in high humidity air, it is necessary that the surface does not dissolve even if it absorbs moisture, and it is desired to dissolve quickly in water.

Adhesion test (tackiness in high humidity environment)
After leaving the specimen in an environmental test chamber at a temperature of 15 ° C to 25 ° C and humidity of 45%, 75%, and 85% for 24 hours, the paper left for 7 days in an environment of humidity 40% is taken out indoors and 1 minute later. Then, a specimen taken out from the environmental test chamber was placed thereon, and a weight of 500 g was further placed thereon for 1 minute to evaluate the adhesiveness when the specimen was peeled from the paper. In addition, the room refers to a state where the temperature is 20 ± 5 ° C. and the humidity is 60 ± 10%.
○: No adhesion, △: Some adhesion, ×: Adhesion

  Using the binding pin 7 and the ring body 8 of the embodiment shown in FIG. 1, A4 copy paper (Fuji Xerox Co., Ltd., 12 sheets, approximately 50 g) was bound to prepare a test sample (0. After using 38g binding pins and two ring bodies each), the following recycled paper test was conducted. The results are shown in Table 4.

Disintegration test The test sample was cut in 1200 g (20 ° C) of water and stirred for 5 minutes to completely disaggregate to obtain a slurry. The obtained slurry was passed through a mesh to confirm the presence or absence of a residue.

COD test The slurry obtained as a result of complete disaggregation by the above disaggregation test is filtered (JISP3801, No. 5C), and the COD (Chemical Oxygen demand, chemical oxygen demand) of the liquid smoke is measured according to JISK0102. did. Note that the blank value is only for copy paper without using the binding pins 7 and the ring body 8.

Heat Fusing Test Using the solution obtained as a result of complete disaggregation by the above disaggregation test, a recycled paper was made by a hand-rolling method to produce two 210 mm × 197 mm recycled paper. The two sheets were stacked, and an iron heated to 190 ° C. was pressed with a force of 5 kg for 10 seconds, and then left to cool to room temperature, and the state of adhesion (fusion) of recycled paper was examined.

Sectional drawing which shows an Example. The top view which shows another example.

Explanation of symbols

A binding tool P paper 1 binding hole 2 binding pin 2a collar part 2b male screw part 3 ring body 4 protrusion 5 medium hole 6 retaining pin 6a collar part 7 slit 8 base part 9 piece part

Claims (2)

Polyvinyl alcohol resin, consisting of one or a mixture of two or more selected from a vinyl acetate unit and a vinyl alcohol unit binary copolymer having a saponification degree of 45 mol% or more and 98 mol% or less. And a binding pin having an inner hole opened at the other end, and a stop pin having a collar portion press-fitted into the inner hole, and by adding moisture to the surface contacting the paper or the members, the paper bundle binding device to grant a viscosity on the surface. Polyvinyl alcohol resin, consisting of one or a mixture of two or more selected from a vinyl acetate unit and a vinyl alcohol unit binary copolymer having a saponification degree of 45 mol% or more and 98 mol% or less. By forming a slit as a part, a base part and a piece part as a part for sandwiching a paper bundle are formed , and moisture is added to the surface in contact with the paper, thereby imparting viscosity to the surface. .

Images