JPS6018955Y2 - Binder binding device attachment device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a binder binding device attachment device.

As shown in Fig. 1-2, the binder binding device that opens and closes elastically has a large number of paper binding rings 3 and 4 integrally formed on elongated blank plates 1 and 2, and the free ends of the wire rings 3 and 4 are Further, the inner edges of the blank plates 1.2 are constrained so as to be able to move up and down against each other, and their outer edges are held by an elastic sheath 5 made of metal.

Knobs 6 and 7 for opening operation are integrally formed at the ends (one or both) of the blank plates 1 and 2, respectively.

When the knobs 6 and 7 are pressed in mutual directions, the blank plates 1 and 2 move elastically from the lower stable position past the dead center to the upper stable position, opening the wire rings 3 and 4, and inserting or removing paper. enable.

On the other hand, to close the wire ring, the blank plates 1 and 2 are moved from the upper stable position to the lower stable position by manually pressing the wire ring in the closing direction.

For the purpose of attaching this binding tool to the binder cover, blank plates 1 and 2 are used.
Punch insertion holes 8 are provided at at least two locations along the contact portion of the sheath 5, and rivet holes 9 are formed in the bottom surface of the sheath 5 corresponding to these locations.

To attach the binding tool to the binder cover, align the holes in the cover B with the rivet holes 9 as shown in Figure 3, insert the rivets 10 from below and place them on the anvil, and insert the rivets into the punch insertion holes 8. Insert the caulking punch 11 and apply impact force to the upper end of the punch to tighten the rivet 10.
Caulk the upper end of the screw around the rivet hole 9.

Although this installation is carried out using a press or the like, the work is cumbersome as there are many steps such as inserting rivets, inserting punches, and caulking.

The attachment means of similar binding devices are also largely the same.

The present invention eliminates the above-mentioned drawbacks and provides a mounting device that allows binding tools to be mounted with a simple operation.

Briefly, the structure of the mounting part of the present invention in which a binding device such as a binder binding device is riveted to a cover is such that the part on the back side of the binding device that comes in contact with the cover is made of a metal plate, and this metal plate has rivets. A circular hole for wearing is provided, and a plurality of radial slits are provided around the hole, and a plurality of tongues formed between these slits are curved and erected from a common circular base in the opposite direction of the cover. An all-plastic stud having a sharp edge and a shank having a diameter larger than the diameter of the hole defined by the inner edge is pressed into the hole through the cover. It is.

According to the attachment part with this structure, the inner edge of the tongue piece bites into the shank part of the press-fitted stud, so not only can the binding tool be attached to the binder simply by press-fitting the stud, but also the base of the tongue piece is circular. Since the distance from the tip of the tongue piece to this circular base is equal, the resistance against the pulling force of the rivet is uniform in the circumferential direction, and the rivet retaining force is increased.

4-6 show the structure of the binder attachment device according to the present invention.

At least two circular attachment holes 11 are formed on the longitudinal centerline of the bottom surface of the sheath 5.

The edges of the mounting holes 11 extend upwardly from the center of the mounting holes 11 from a common circular base spaced by equally spaced slits 12, and their inner edges 14 terminate in sharp corners.

The diameter of the circle defined by these inner edges 14 is smaller than the diameter of the shank portion 15 of the stud 10 used,
When inserted into the shank 15 from below (FIGS. 5 and 6), the dimensions are such that it can be slidably press-fitted by applying sufficient force.

This sliding press-fit is also determined by the inclination angle of the elastic piece 13, and this inclination angle, the diameter of the inner edge 14, and the width and number of slits 12 are appropriately selected and combined.

The stud 10 is composed of a shank portion 15 and a head portion 16, and is preferably made of plastic so that the elastic piece 13 of the mounting hole can be sufficiently bitten as will be described later.

The head 16 may also have a decorative function. The shank portion 15 is made sufficiently larger than the innermost diameter of the mounting hole 11 as described above.

As a result, when the stud is press-fitted into the mounting hole 11, the elastic piece 1
Invade while pushing and expanding 3, and once it enters, the inner edge 1
It remains in that position due to uniform biting of the shank part of No.4.

In response to the force that tries to separate the binding and the cover, since the distances of the elastic pieces from their tips to the circular base are equal, a large overall resistance is generated and the elastic pieces bite into the shank more and more, resulting in a reliable riveting force. It will be done.

It will be clear that the installation of the studs 10 does not require the use of any jigs.

Although the above description has been made regarding a specific type of binder or binding device, it goes without saying that the present invention is equally applicable to other types of binding devices.

In use, the mounting holes 11 of the sheath of the binder binding device are correctly positioned in the rivet holes of the binder cover B, and the shank portions 15 of the rivets 10 are press-fitted from below into the aligned holes (6th
(see figure).

Then, the elastic piece 13 of the attachment hole is pushed open, the circle defined by the inner edge 14 becomes larger, and the shank portion 15 enters the attachment hole 11 while sliding.

Since the shank portion 15 is made of plastic material, it similarly undergoes some elastic deformation.

When the shank portion 15 enters the mounting position in this manner, the elasticity of the elastic piece 13 and the biting by the sharp corner of the inner edge 14 firmly hold the shank portion and therefore the stud at the mounting position.

The tension acting between the rivet and the binding device promotes the biting of the inner edge 14 into the shank portion 15.

According to the present invention, since the operation of attaching the binder binding tool to the binder cover can be performed in a one-touch manner, the manufacturing process is simplified and the process cost is reduced, which greatly contributes to those skilled in the art.

In the embodiment described above, the elastic piece divided by three slits is arranged around the mounting hole, but the number of slits may be changed, and the inner edge may be shaped like a knife. It can be serrated.

Although the stud is preferably made of plastic, it can also be constructed by adding serrations around a metal shank.

[Brief explanation of drawings]

Fig. 1 is a partial plan view of a conventional binder binding device, Fig. 2 is a front view of the same, and Fig. 3 is a sectional view showing a conventional binder binding device and attachment method, along the line ■-■ in Fig. 1. Fig. 4 is a plan view (excluding the blank plate) of the sheath having the mounting hole of the present invention, Fig. 5 is a sectional view taken along the line ■-■ in Fig. 4, and The figure is a sectional view of the mounting device of the present invention in the mounted state. The main members in the figure are as follows. 5: Sheath, 10: Stud,
11: Mounting hole, 12 Nislit, 13: Elastic piece, 14:
Inner edge, 15: shank, 16: head.

Claims (1)

[Scope of utility model registration request] In the structure of the mounting part in which a binding device such as a binder binding device is riveted to the cover, a metal plate is used at the part of the back side of the binding device that comes into contact with the cover, and a circular hole for attaching the rivet is provided in the metal plate. At the same time, radial slits are provided around the hole, and a plurality of tongues formed between the slits are curved and erected from a common circular base in the opposite direction of the cover, and the inner edges of the tongues are formed into sharp corners. A structure of a mounting part for a binder, etc., in which an all-plastic stud having a shank portion having a diameter larger than the diameter of the hole defined by the inner edge is press-fitted into the hole through the cover. .