JPH0674375U - Paper bundle binder - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention inserts a binding pin into a hole in a bundle of paper,
Regarding a paper bundle binding tool in which a fitting ring is fitted and fixed to the protruding end, the purpose is to prevent the fitting ring from coming off from the binding pin when the paper bundle is greatly opened to the left and right during copying. At the same time, I will try to make it easier to increase and decrease the stack of paper. [Structure] In a paper bundle binding tool in which a synthetic resin male screw-shaped binding pin is inserted into the perforation of the paper bundle and a fitting ring of synthetic resin is press-fitted and fixed to the protruding end, a hollow portion is formed at the center of the binding pin. A paper-bundle binding tool, characterized in that a stop pin is press-fitted into a hollow end portion of the binding pin formed with the fitting ring fitted therein.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a paper bundle binding tool for binding about 50 to 200 paper bundles punched by a punching machine with a rod-shaped male member and a fitting ring.

[0002]

[Prior art]

 Conventionally, a paper bundle binding tool as shown in FIG. 4 is known (see Japanese Patent Laid-Open No. 62-218197). Explaining below, by attaching a ring-shaped female member to a male member having sawtooth-shaped male teeth formed on the outer periphery, a paper bundle (document) can be bound. However, in this conventional technique, a paper bundle having an arbitrary thickness can be firmly bound, but it is not suitable for increasing or decreasing the bound paper bundle. In other words, when adding to the bound paper bundle or when reducing the bound paper bundle, the female member must be removed from the male member, but the female member is firmly attached to the male member. I couldn't remove it, so I had to cut the male part after all.

Therefore, as shown in FIG. 1, a binding tool has been devised for binding a bundle of paper sheets by fitting a fitting ring to a hollow male member. This is intended to facilitate the attachment and detachment of the fitting ring to some extent by utilizing the elastic force of the hollow male member.

[0004]

[Problems to be solved by the device]

 In the above prior art, there is no problem in the bound state or in normal use, and even when the number of sheets is increased or decreased, the male member and the fitting ring can be easily attached and detached, and the number of sheets is increased or decreased. Work has become easier. However, there is a problem in that the fitting ring becomes easy to come off in spite of the weakened fitting force, and the fitting ring comes off and the paper stack is scattered when the paper stack is strongly opened to the left and right in a copying machine. was there . The present invention aims to solve the above problems.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a paper bundle binding tool in which a synthetic resin male screw-shaped binding pin is inserted into the perforation of the paper bundle and a fitting ring of synthetic resin is press-fitted and fixed to the protruding end. The hollow pin is formed at the center of the binding pin, and the stopper pin is press-fitted into the hollow part of the end of the binding pin fitted with the fitting ring.

[0006]

【Example】

 Reference numeral 1 is a binding pin made of synthetic resin, which has a collar 2 at one end, a hollow portion 3 at the center, and ring-shaped locking projections 4 formed at regular intervals on the outer circumference. Reference numeral 5 is a fitting ring, and the inner hole 6 is formed to be slightly smaller than the diameter of the outer peripheral valley portion 1a of the binding pin 1, and is fitted and fixed in the press-fitting portion. The binding pin 1 and the fitting ring 5 may be made of the same medium density polyethylene, but even if the binding pin 1 and the fitting ring 5 are made of the same material, the fitting ring 5 should be made slightly harder than the binding pin 1. A stopper pin 7 is press-fitted into the hollow portion 3 and is made of high-density polyethylene harder than the material of the binding pin 1. A collar 8 is formed at the upper end and a hollow portion 9 is formed at the center.

Next, a binding method will be described. The binding pin 1 is inserted into the perforation B of the sheet bundle A, the fitting ring 5 is fitted and fixed to the protruding end portion, and the locking pin 7 is press-fitted into the hollow portion 3. By doing so, the inward deformation of the binding pin 1 is eliminated and the fitting ring can be prevented from falling off even when the paper bundle is strongly opened to the left and right. When it is desired to increase or decrease the number of sheets A, the stop pin 7 is removed and the fitting ring 5 is removed. In this case, the binding pin 1 is slightly deformed inward and is easy to remove. The brim 8 prevents the mating ring 5 from turning up, but if the usage is such that a strong force is not applied when the stack of paper is opened left and right, as shown in FIG. Even if the retaining pin 10 is not formed with a collar, the retaining pin 10 functions well.

[0008]

[Effect of device]

 The present invention is a paper bundle binding device in which a synthetic resin male screw-shaped binding pin is inserted into the perforation of a paper bundle, and a synthetic resin fitting ring is press-fitted and fixed to the projecting end portion. Since the stopper pin is press-fitted into the hollow portion of the end of the binding pin in which the fitting ring is fitted, it is possible to reliably prevent the fitting ring from falling off the binding pin.

[Brief description of drawings]

FIG. 1 is a partially cut front view of a binding portion when an embodiment of the present invention is used.

FIG. 2 is a front view of the binding device of FIG.

FIG. 3 is a partially cut front view of another embodiment of a lock pin.

FIG. 4 is a partially cut front view of a conventional binding device when in use.

[Explanation of symbols]

 1 Binding pin 2 Tsuba 3 Hollow part 4 Locking protrusion 5 Fitting ring 6 Inner hole 7 Stop pin

Claims (1)

[Scope of utility model registration request] 1. A paper bundle binding tool in which a synthetic resin male screw-shaped binding pin is inserted into a perforation of a paper bundle and a fitting ring of synthetic resin is press-fitted and fixed to a projecting end of the paper bundle. A paper bundle binding tool, characterized in that a stopper pin is press-fitted into the hollow end portion of the binding pin into which the fitting ring is fitted.