JP2000046018A - Sheet binding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To extremely easily bind opposed edges of sheets. SOLUTION: This device comprises at least two sheets, an insertion tongue piece 13 arranged on the inner side of a U-shaped slit 12 which is formed in one of the overlapped parts of these sheets 11 and whose both ends are directed to another side, a passing window 14 formed in the other of the overlapped parts of the sheets 11 so that the tongue piece 13 can be inserted therein and engaged therewith, and a holding piece 16 arranged on the inner side of a U-shaped slit which is formed in the tongue piece 13 and whose both ends are directed to the projecting direction of the tongue piece 13 so as to hold from the passing window 14 of the sheet 11 to the edge thereof, and the escape of the tongue piece 13 is prevented by the holding piece 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for joining overlapping sheets.

2. Description of the Related Art Conventionally, linear or point-like heat welding and heat welding are used as means for connecting (including fixing) sheet overlapping surfaces of cases, covers and other synthetic resin sheets (such as semi-hard). Have been.

According to the above-described heat welding or heat welding, traces of the welding or welding appear on the surface of the sheet, making the sheet unsightly, and the cost increases due to troublesome processing. Since the assembled shape is maintained during the process of heat welding or heat fusion, various inconveniences occur in handling, transportation, storage, etc., due to the bulkiness.

Therefore, as shown in FIG. 6, a U-shaped or U-shaped slit 3 is formed in one of the overlapping surfaces of the front sheet 1 and the back sheet 2, and a tongue piece 4 is overlapped inside the slit 3. On the other side of the surface, a penetrating window 5 parallel to the connection base of the tongue piece 4
The front sheet 1 and the back sheet 2 that overlap each other can be joined by inserting and engaging the through window 5 to eliminate the above-mentioned problem.

[0004]

According to the above-mentioned joining method, when a force is applied to both or one of the front and back sheets in a direction along both side edges of the tongue piece due to some influence, the tongue comes out of the penetrating window. A problem has arisen in which the pieces are very easily pulled out and unbound to the overlapping sheets.

In addition, each time the connection is released, a time-consuming connection for inserting a tongue into the through-hole and engaging the same is required.

SUMMARY OF THE INVENTION It is an object of the present invention to maintain a connected state even if a sliding movement occurs on an overlapping surface of sheets in the connected state.

[0007]

In order to solve the above-mentioned problems, the present invention provides at least two sheets and a U-shaped notch in which one end of the overlapping portion of the sheets faces the other side. The tongue piece provided inside the cut, a penetrating window provided so as to insert and engage the tongue piece with the other overlapping part of the sheet, and both ends of the tongue piece in the projecting direction of the tongue piece. A configuration is adopted in which a U-shaped notch is provided, and a holding piece is provided inside the notch so as to hold the portion from the through window to the edge of the sheet.

[0008]

Embodiments of the present invention will be described with reference to the accompanying drawings.

In the embodiment of the present invention, as shown in FIGS. 1 to 3, both ends of the sheet 11 are located on the side of the one sheet 11 where at least two sheets 11, 11 overlap.
Make a U-shaped cut 12 located in front of the edge of
A tongue piece 13 is provided inside the cut 12.

[0010] The other sheet 11 is provided with a through window 14 along the edge of the sheet 11 (this edge is the side facing the direction of the one sheet).

Further, the tongue piece 13 has a U-shaped cut 15 whose both ends are oriented in the projecting direction of the tongue piece 13, and a holding piece 16 is provided inside the cut 15.

The notch 12 provided with the tongue piece 13 is
The notch 15 provided with the holding piece 16 instead of the illustrated U-shape may be formed into the U-shape instead of the illustrated U-shape.

With the above construction, first, the tongue piece 13 is inserted into the penetrating window 14, and the joined portions of the two sheets 11, 11 are overlapped while creating an engagement relationship between the penetrating window 14 and the tongue piece 13.

Next, the tip (free end) of the tongue piece 13 is gripped while maintaining the engagement relationship between the penetrating window 14 and the tongue piece 13, and the gripped portion is moved toward the back surface of the sheet 11 (downward in FIG. 2). Bend.

Then, the embracing piece 16 that has escaped from the cut 15 rises with respect to the surface of the tongue piece 13, and the leading end (free end) of the embracing piece 16 with the upright portion of the sheet 11 on the side having the penetrating window 14. After passing over one edge (from the back surface of the sheet 11 having the penetrating window 14 toward the front surface), the bending of the tip end of the holding piece 16 is released. The holding piece 16, which has returned to the original position with the release of the bend, is provided with
The sheet 1 overlaps with the surface of the sheet 11 on the side having
6, the edge of the sheet 11 on the side having the penetrating window 14 is held, and the edge is sandwiched between the tongue piece 13 and the holding piece 16 so that the sheets 11, 11 are inserted as shown in FIGS.
Join the overlapping parts of.

At the time of the above-mentioned connection, the sliding movement of the sheets 11, 11 in the connection overlapping portion is performed by moving the edges of the through-hole 14 at both ends of the cut 12 and the sheet 11 having the through-hole 14 at both ends of the cut 15. Is blocked (shown in FIG. 2).

As a result, a stable engagement relationship is maintained. The disengagement of the engagement is performed by the reverse operation.

As an article using the combination of the overlapping portions of the sheets 11 and 11 as described above, for example, it is necessary to attach and detach the overlapping portion between the box-side sheet 11 and the lid-side sheet 11 of the case S shown in FIG. And the joining of the overlapping portions of the sheets 11 connecting at least two sheets 11 of the cylindrical case or cover Y surrounding the product X shown in FIG. 5 and the joining of the overlapping portions of the sheets when assembling the case. (Not shown).

In short, it is used for joining overlapping portions of sheets.

The sheet 11 is a sheet impregnated with a liquid (for example, a semi-rigid synthetic resin sheet or paper for reinforcing resin or waterproofing) which is not damaged by sliding movement of the joint. You may.

[0021]

As described above, the sheet connecting apparatus according to the present invention is constructed as described above, so that the tongue piece inserted and engaged with the through window does not escape (disengage) due to sliding movement of the sheet or the like. can do. For this reason, a stable engagement relationship can be maintained.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a coupling portion.

FIG. 3 is a longitudinal sectional side view of a connecting portion.

FIG. 4 is a perspective view showing an example of a combined product.

FIG. 5 is a cross-sectional plan view showing another example.

FIG. 6 is a perspective view of a conventional example.

[Explanation of symbols]

 11 sheet 12 15 cut 13 tongue piece 14 penetrating window 16 holding piece

Claims (1)

[Claims] At least two sheets, a U-shaped notch having both ends facing the other side in one of overlapping portions of the sheet, an insertion tongue provided inside the notch, A penetrating window provided so that the tongue piece is inserted into and engaged with the other overlapping part, and a U-shaped notch whose both ends are oriented in the projecting direction of the tongue piece is formed in the tongue piece, and the sheet is provided inside the notch. And a holding piece provided so as to embrace a portion between the through window and the periphery of the sheet. [0001]