JPH0221257Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a binder binding device, and more particularly to a locking mechanism for left and right substrates of a plastic molded binder binding device.

[Prior art]

A binder binding tool is widely used, in which a pair of substrates each having a plurality of binding rings erected at regular intervals along the outer edge are brought into contact with each other on the inner edge so as to be openable and closable. 1 to 5 are diagrams showing an embodiment of the present invention, and since there is no difference from the conventional one except for the bottom surface, the prior art will be explained with reference to these.The pair of substrates 1 and 2 are Spelling rings 3 at regular intervals along the outer edge,
These substrates 1 and 2 are butted on their inner sides, and both edges 8 and 9 of the elastic metal sheath 7 are inserted into the vertical grooves 5 and 6 formed on the outer sides from the direction of the arrow in FIG. Push in and press both boards elastically from both sides. At the bottoms of the inner sides of both substrates 1 and 2 are protrusions 12 and 13 that act as stoppers when the substrates 1 and 2 move upward.
are integrally formed and extend alternately to the bottom of the mating substrate, as shown in FIG. Therefore, from the closed position as shown in FIGS. 1 to 3, the knobs 10, 11, 10', and
1' in the mutual direction with your fingers, the boards 1 and 2 move elastically upwards to open the binding rings 3 and 4, and conversely, when you push the binding rings in the mutual direction with your fingers, the boards 1 and 2 open. moves elastically downward and the ring closes.

[Problems with conventional technology]

Although the left and right substrates 1 and 2 having binding rings may be molded into the same shape, they are usually not the same.
For example, in the case of Fig. 1, the vertical grooves 5, 6 on the outer sides of the substrates 1, 2 are opened at the support plate 14 of the knob 11 (indicated by the arrow) (see Fig. 2), and the longitudinal grooves 5, 6 on the outer sides of the substrates 1, 2 are opened at the support plate 14 of the knob 11 (see Fig. 2). It is closed with a support end plate 15. This is a convenient structure for positioning and holding the sheath 7 (preventing the sheath from shifting due to vibration during transport of the binder). However, as is clear from the figure, since the substrates 1 can be combined, they may be combined by mistake. Therefore, after plastic molding, it is necessary to temporarily assemble the left and right boards 1 and 2 before transporting them to the assembly factory, but as shown in Figure 6, the inner sides of the boards 1 and 2 simply abut. Because it is only a single board, it often comes off during transportation or assembly work, and it often happens that the boards 1 are assembled and the sheath 7 is inserted.

Furthermore, even if the left and right boards 1 and 2 are molded identically, if the temporary assembly process for the boards 1 and 2 and the insertion process for the sheath 7 are separated, both boards often come off, impairing workability. Significantly inhibits.

[Purpose of invention]

An object of the present invention is to provide a binder binding device in which the temporarily assembled binding device substrate is stably held and there is no risk of it coming off.

[Key points of the idea]

The binder binding device of the present invention has a structure in which a pair of left and right boards with binding rings upright are brought into contact with each other at their inner edges, and the outer edges of the boards are held down by an elastic sheath. A locking protrusion is provided at the tip of the protrusion that protrudes toward the bottom surface of the substrate, and is hooked onto the tip of the protrusion of the mating substrate.

According to the present invention, when temporarily assembling both boards, the latching protrusions of each board elastically fit over the latching protrusions of the mating board, pulling the board outward with a relatively large force. It does not come off easily, and there is no risk of it coming off during transport or when temporarily assembled boards are stacked up between processes, which can prevent defects and decreases in work efficiency.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to FIGS. 1 to 5.

As described in connection with the prior art, the plastic integrally molded substrates 1 and 2 on which a plurality of binding rings 3 and 4 are erected at equal intervals along their outer edges are abutted on their inner edges, The binding rings 3 and 4 can be opened and closed freely. The edges 8 and 9 of the sheath 7 are inserted into the grooves 5 and 6 formed on the outer sides of the substrates 1 and 2 from the direction of the arrow. Manual knobs 10, 11, 10', 11' are formed at both ends of the base plates 1, 2 so that the base plates 1, 2 can be driven upward to open the binding ring.

As shown in FIGS. 1, 3, and 4, protrusions 12, 13 are formed on the inner bottom surfaces of the substrates 1, 2 and extend alternately toward the bottom surface of the mating substrate. It functions as a stopper that determines the opening of 4 and the inclination of substrates 1 and 2. As shown in Figure 4,
At the tips of the protrusions 12 and 13, latching protrusions 16 and 17 are formed that protrude in the direction along the inner sides of the substrates 1 and 2, respectively. In the figure, protrusions 16 and 17 are protrusions 1
Although they are formed on both sides of 2 and 13, they may be formed in only a few selected places. These protrusions 16,
17, when the two boards 1 and 2 are brought into contact with each other on their inner sides and temporarily assembled, they come into contact with each other, and when the boards are further pushed together, the protrusions go beyond the protrusions of the other party and enter the bottom surface of the other board. The inner sides of the substrates touch each other.

Once the boards 1 and 2 are temporarily assembled in this way, even if they are left as they are, they can be held together as shown in the upper side of Figure 1, the upper side of Figure 3, or the upper side of Figure 5, and external forces can be applied. Even if it is added, it will not come off easily. Therefore, as described above, problems such as a decrease in work efficiency due to the boards coming apart and incorrect assembly when the two boards are not the same can be prevented.

FIG. 7 is a bottom view of a binding device according to another embodiment of the present invention, in which pairs of protrusions 12 and 13 are provided at several locations apart from each other. Unlike the previous example, the latching protrusions 16 and 17 have flat edges as latching portions so that they can be firmly latched to each other at the portions where the protrusions 12 and 13 are close to each other.

[Brief explanation of the drawing]

Fig. 1 is a partially exploded side view of the binder binding device of the present invention, Fig. 2 is an end view of the same, and Fig. 3 is the A--
A-line enlarged sectional view, Fig. 4 is an exploded bottom view of a part of the board, Fig. 5 is a perspective view of the temporarily assembled board, Fig. 6 is a bottom view of the conventional binding device, and Fig. 7 is the present invention. FIG. 6 is a bottom view of a part of the substrate of another embodiment. The main parts in the figure are as follows. 1, 2... Board, 3, 4... Binding ring, 5, 6...
Vertical groove, 7...Sheath, 10, 11, 10', 11'...
...Operation knob, 12, 13...Protrusion, 16, 17
...Katching protrusion.

Claims (1)

[Scope of utility model registration request] a pair of substrates having a plurality of binding rings that can freely abut each other and that abut each other on their inner sides; an elastic sheath that restrains both outer edges of the substrates; and an elastic sheath formed on at least one end of the substrates. In a binder binding device comprising an operating knob that acts to open the board, each of the boards 1 and 2 has a plurality of protrusions 12 and 13 at the bottom of the inner side that protrudes from the bottom surface of the mating board, At least two of the plurality of protrusions are formed adjacent to protrusions formed on the mating substrate so that they do not move in the longitudinal direction of the substrates when the two substrates are abutted on their inner sides. A binder binding tool characterized in that at least two tip side surfaces of the adjacent protrusions of each of the substrates have protrusions 16 and 17 that protrude toward the adjacent protrusions of the mating substrate.