JP2604637Y2 - Paper bundle binding device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper bundle binding device for binding a bundle of about 50 to 200 sheets perforated by a perforator with a rod-shaped male member and a fitting ring.

[0002]

2. Description of the Related Art Conventionally, a paper bundle binding device as shown in FIG. 4 is known (see Japanese Patent Application Laid-Open No. Sho 62-218197). In the following description, a paper bundle (document) can be bound by fitting a ring-shaped female member to a male member having serrated male teeth formed on the outer periphery. However, in this conventional technique, although a paper bundle having an arbitrary thickness can be firmly bound, it is not suitable for increasing or decreasing the number of bound paper bundles. In other words, when further 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 fitted to the male member. It could not be removed, and eventually the male member had to be cut.

Therefore, as shown in FIG. 1, a binding device for binding a bundle of paper by fitting a fitting ring to a hollow male member has been devised. This is intended to make it easier to attach and detach the fitting ring to some extent by utilizing the elastic force of the hollow male member.

[0004]

In the above-mentioned prior art, there is no problem in the bound state or in normal use, and even when the number of paper bundles is increased or decreased, the attachment and detachment of the male member and the fitting ring can be performed. It has become easier, and the work to increase and decrease the paper bundle can be done easily. However, the fitting ring is likely to come off instead of the weakening of the fitting force, and when the paper bundle is strongly opened right and left for copying in a copying machine, the fitting ring comes off and the paper bundle is unraveled. was there. The purpose of the present invention is to solve the above problems.

[0005]

In order to achieve the above object, the present invention has a flange at one end, a hollow hole at the center, and an outer periphery.
Synthetic resin with ring-shaped locking projections formed at regular intervals on the
A fitting ring is fitted to the other end of the binding pin made of
Is slightly smaller than the diameter of the outer peripheral valley of the ring-shaped locking portion.
And press-fit the stop pin from the other end of the hollow hole of the binding pin.
It is characterized by doing so.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference numeral 1 denotes a binding pin made of a synthetic resin,
A hollow portion 3 is formed at the center, and ring-shaped locking projections 4 are formed at regular intervals on the outer periphery. Reference numeral 5 denotes a fitting ring, and the inner hole 6 is formed to be slightly smaller than the diameter of the outer peripheral valley 1a of the binding pin 1, and is fitted and fixed to the press fit. The material of the binding pin 1 and the fitting ring 5 may be the same medium-density polyethylene. However, even with the same material, the fitting ring 5 is preferably made of a slightly harder material than the binding pin 1. Reference numeral 7 denotes a stopper pin which is press-fitted into the hollow portion 3 and the binding pin 1
Made of a high-density polyethylene harder than the material described above, a flange 8 is formed at the upper end, and a hollow portion 9 is formed at the center.

Next, the binding method will be described. The binding pin 1 is inserted through the perforation B of the paper bundle A, and the fitting ring 5 is inserted into the protruding end.
Is fitted and fixed, and a retaining pin 7 is pressed 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 sheet bundle is strongly opened right and left. If the user wants to increase or decrease the paper bundle A, remove the retaining pin 7 and remove the fitting ring 5. In this case, the binding pin 1 is slightly deformed inward and is easily removed. The collar 8 prevents the fitting ring 5 from being turned up, but when the paper bundle is opened right and left,
If the usage is such that a very strong force is not applied, the function is sufficient even if the stopper pin 10 is not formed with a flange as shown in FIG.

[0008]

[Effect of the Invention] The present invention has a flange at one end and a hollow center.
With holes, ring-shaped locking projections are formed at regular intervals on the outer circumference
Fitting ring to the other end of the binding pin made of synthetic resin
And the inner diameter is the diameter of the outer peripheral valley of the ring-shaped locking portion.
Slightly smaller than the other end of the hollow hole of the binding pin.
Since the retaining pin is press-fitted, it is possible to reliably prevent the fitting ring from falling off from the binding pin , and
Can be freely increased or decreased.

[Brief description of the drawings]

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

FIG. 2 is a partially cutaway front view of the binding device of FIG. 1;

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

FIG. 4 is a partially cut front view when a conventional binding device is used.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Binding pin 2 Flange 3 Hollow part 4 Locking projection 5 Fitting ring 6 Inner hole 7 Stop pin

Claims (1)

(57) [Scope of request for utility model registration] (1) a flange at one end, a hollow hole at the center,
Synthetic tree with ring-shaped locking protrusions formed at regular intervals on the outer circumference
A fitting ring is fitted to the other end of the binding pin made of
The inner diameter is slightly smaller than the diameter of the outer peripheral valley of the ring-shaped locking portion.
It is formed small, and a stop pin is formed from the other end of the hollow hole of the binding pin.
A paper bundle binding tool that is press-fit .