JPS6039253Y2 - Paperboard folding parts - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in a device used at least when folding cardboard A, which is a material for book covers and the like.

A sheet of cardboard A is folded along each fold line, and when the process shown in Figure 9 is made to produce the picture shown in Figure a, each fold line is bent at right angles. The first thing you need to do is just assemble it.
As shown in detail in Figure 1, the top plate A and the bottom plate opening on the opening side are curved outward and do not form a perfect picture.

Therefore, it is advisable to pre-fold the paper at an angle of 90 degrees or more as shown by a' in the process diagram of Fig. 9, but even if you use a conventional folding tool to fold it at an angle of 90 degrees or more, as shown in Fig. 10, Since the bent edge of the paperboard cannot be aligned with the pivot axis of the lever, the tip of the lever often slips on the contact surface of the paperboard and causes damage.

This invention was devised to eliminate this drawback.
A working rod 3 having a cross-sectional shape in which two surfaces widen in an F-shape is bridged between the supporting shafts 2, 2 at both ends, and the ridgeline 3a where the two surfaces intersect is the center of the supporting shaft 2. It is arranged so as to be offset from O by the thickness X of one paperboard.

Embodiments of the present invention will be described based on the drawings.

As shown in Fig. 1, a support shaft 2 is provided protruding outward from the center of the two right and left receiving plates 1, 1, and two surfaces between the two receiving plates 1, 1 are shaped like a square. The working rod 3 having a widening cross-sectional shape is bridged.

The mounting position of this working rod 3 is as shown in Figure 2.
The ridgeline 3a where the two surfaces intersect is located at a position offset from the center O of the spindle 2 by a thickness X equivalent to one sheet of paperboard.

This device is rotatably installed so as to cross the conveyance path of paperboard A, and is shown as a'' in the process diagram of FIG.

It is convenient to use when performing the bending indicated by a'''.

To explain its operating state, when the receiving plate 1 rotates clockwise around the support shaft 2 from the state shown in Fig. 3,
The operating rod 3 rotates as shown in FIG. 4, and the paperboard A is reliably bent from the fold line by one surface 3b of its two surfaces.

In this case, since the folded edge C of the paperboard can be made to coincide with the rotation center corresponding to the ridgeline 3a of the working rod 3,
It has the advantage of not damaging the paperboard compared to using conventional folding levers.

During the above-mentioned folding operation, it goes without saying that the paperboard A should be held down with something so that it does not move.

FIG. 5 shows a modification of the present invention, in which a long claw 4 is attached to the hem of one surface 3b of the two wide-spreading surfaces in the central portion of the working rod 3, leaving both ends intact. It was established.

This pawl 4 positions the paperboard in the left-right direction of the conveyance path (direction perpendicular to the direction of travel), and engages with the edge b (FIG. 7) of the paperboard A after being bent by the working rod 3. It is used to stand up the pre-folded flap a1.

The device shown in this modification is rotatably installed on both sides of the paperboard A along the conveyance path, and is used to position the paperboard in the left and right direction as indicated by a' in the process diagram of FIG.
It is convenient to use it when bending 1 and pulling it back.

To explain its operating state, when the paperboard A has been fed this far, when the receiving plate 1 is rotated inward of the conveyance path around the support shaft 2, the operating rod 3 becomes the state shown in FIG. On both sides of the conveyance path, the claws 4 of the working rod 3 touch the paperboard A.
The positioning is performed by aligning both the left and right ends of the .

Therefore, the paperboard A does not slip in the left-right direction on the conveyance path, is properly positioned at a predetermined position, and does not interfere with the subsequent folding operation.

When the receiving plate 1 is rotated clockwise from the state shown in FIG. 6, the flap a1 can be bent from the crease line by one surface 3b of the working rod 3, as shown in FIG. , since this is no different from that shown in FIGS. 1 and 2, detailed explanation thereof will be omitted.

When the receiving plate 1 is rotated counterclockwise around the support shaft 2 from the state shown in FIG. 7, the end edge of the bent flap a1 is engaged with the pawl 4, so that the flap a1 stands up as shown in FIG.

Thus, by using the device shown in FIG. 5, it is possible to perform the lateral positioning of the paperboard, the folding of the flap, and the pulling back of the flap.

According to the present invention, it is possible to match the folding edge C of the paperboard with the center of rotation, which is the ridgeline 3a where the surface of the working rod 3 intersects, so that when using a conventional folding lever, It has the advantage of not damaging the paperboard compared to other paperboards.
In addition, if a claw 4 is provided at the hem of one surface 3b of the action rod 3, it is possible to align the edges of the paperboard, fold the flap after folding, and pull it back, which is extremely convenient. It is.

[Brief explanation of the drawing]

The drawings show an embodiment of the paperboard folding member according to the present invention; FIG. 1 is a perspective view, FIG. 2 is an enlarged sectional view of the center, and FIGS. 3 and 4 show the state before and after operation. 5 is a central enlarged vertical sectional view showing a modified example of the present invention; FIGS. 6, 7, and 8 are enlarged longitudinal sectional views showing the operating state in the order of steps; FIG. FIG. 10 is a schematic diagram showing an example of a conventional folding member; FIG. 11 is a perspective view of a picture assembled after folding using this; It is. 1...Brace plate, 2...Spindle, 3...
...Action rod, 3a...Ridge line, 4...Claw, A...Paperboard, al...Flap, b
・・・・・・Edge.

Claims (1)

[Claims for Utility Model Registration] 1. Between the support shafts 2 and 2 at both ends, a working rod 3 having a cross-sectional shape in which two surfaces spread out in an F-shape is bridged, and the working rod 3 has two surfaces that intersect. A member for folding paperboard, characterized in that a ridgeline 3a is provided so as to be offset from the center O of the support shaft 2 by the thickness X of one paperboard. 2. The paperboard folding member according to claim 1, wherein the claw 4 is formed at the hem of one surface 3b of the two surfaces of the operating rod 3.