JP2003311849A - Blank bending apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blank bending apparatus capable of restraining a work space narrow where the blank is bent. <P>SOLUTION: The blank bending apparatus 10 is provided with a rotation mechanism 30 comprised of a rotating leg 31, and a square pillar guide 11 which wraps the blank W provided at the tip end of the rotating leg 31. The square pillar guide 11 has a square part 11e corresponding to a ruled line K<SB>1</SB>-K<SB>5</SB>of the blank W and a meshing unit 12 which fixes the inner end 1 of the blank W. A forming roller 14, and a pressing roller 15 disposed at the outside of the square pillar guide 11, are provided at the tip end of the rotating leg 31. The blank W is fixed by the meshing unit 12 of the square pillar guide 11 and then wrapped along the outer periphery of the square pillar guide 11 which revolves and rotates on its axis along with the rotation mechanism 30. The forming roller 14 and the pressing roller 15 press the blank W on the outer periphery of the square pillar guide 11 and a box shape body of the blank W is obtained. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blank folding device for folding a paper blank along a ruled line to form a box-shaped body.

[0002]

2. Description of the Related Art Conventionally, when a paper blank is bent to form a box-shaped body, the paper blank is first bent along a specific ruled line. Then, return the bent blank. Fold the blank back along the other ruled lines to restore it.

In this way, the blank is "bent"
After performing the "return" step multiple times, the outer edge of the blank is glued.

The box-shaped blank manufactured in this manner is flattened and discharged outward.

[0005]

As described above, when a paper blank is bent to form a box-shaped body, it is necessary to repeat the work of bending the blank along the ruled line and then returning it to the original position a plurality of times. . For this reason, the blank "fold" and "return"
Equipment and space for performing the process multiple times are required.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a blank folding device capable of saving space when installing the device.

[0007]

SUMMARY OF THE INVENTION The present invention is a blank bending apparatus for forming a box-shaped body by folding a blank having ruled lines along the ruled lines, and a corner portion corresponding to the ruled lines of the blank and the blank. Has a stopper to stop the inner end of
Corresponds to multiple prismatic guides that form a box by winding a blank around the outer circumference, forming rollers that are provided outside each prismatic guide and press the blank against the prismatic guides, and prismatic guides and prismatic guides. And a rotating mechanism for holding the forming roller, and a folding device for the blank.

According to the present invention, there is provided a first paste application device for applying paste to the blank and pasting an outer end portion of the blank to the outside of the prismatic guide held by the rotating mechanism. It is a folding device.

The present invention relates to a blank folding device characterized in that a pulling device for pulling out a box-shaped blank wound around a prism guide is provided in the vicinity of the prism guide held by a rotating mechanism. is there.

According to the present invention, the extracting device has a supporting frame provided outside the rotating mechanism and having a guide rail, and a cam follower that moves along the guide rail of the supporting frame and pushes out a box-shaped blank. This is a blank folding device.

According to a second aspect of the present invention, a box-shaped blank that is pulled out by a pulling device is applied with glue on its inner end and is glued on the inner end in the vicinity of a prism guide held by a rotating mechanism. It is a blank folding device characterized by being provided with a glue coating device.

According to the present invention, an inner roller and an outer roller, which are located inside and outside the inner end of the blank and sandwich the inner end of the blank, are provided in the vicinity of the second paste coating device. It is a characteristic folding device.

The present invention is a blank bending apparatus in which a prismatic guide is held by a rotating mechanism so as to be rotatable.

The present invention is the blank folding device, wherein the stopper is a blank suction device.

The present invention is a folding device for a blank, characterized in that the stop portion comprises a blank biting device.

According to the present invention, the rotating mechanism comprises a plurality of rotating legs extending in the radial direction from the center of rotation, and each prismatic guide and the forming roller corresponding to the prismatic guide are provided at the tip of each rotating leg. It is a characteristic folding device.

The present invention is the blank folding device, wherein the rotating mechanism is composed of a rotating endless chain, and each prism guide and a forming roller corresponding to the prism guide are provided in the endless chain.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

1 to 6 are views showing an embodiment of a blank folding device according to the present invention.

First, a paper blank W for forming a box-shaped body will be described with reference to FIG. Paper blank W
Has 5 ruled lines K ₁ , K ₂ , K ₃ , K ₄ , K ₅ in advance, and the blank W is formed by these 5 ruled lines K _{1 to} K ₅ .
Is divided into six faces 1, 2, 3, 4, 5, 6.

Then, the blank W is bent along the ruled lines K _{1 to} K ₅ to form the box-shaped body C.

Next, a blank folding device will be described with reference to FIGS.

As shown in FIGS. 1 to 3, the blank folding device 10 includes a rotatable rotation mechanism 30 including a plurality of, for example, eight rotation legs 31 extending in a radial direction from a rotation center 30a, and each rotation mechanism. It is provided with a rectangular columnar prism-shaped guide 11 provided at the tip of the leg 31.

[0024] Among the four corner portions 11e prismatic guide 11 corresponding to the border _K 1 ~K ₅ blank W, corner 1
It has four side surfaces 11a, 11b, 11c, 11d between 1e. Further, at the tip of the rotary leg 31 of the rotating mechanism 30, a forming roller 14 installed outside the prismatic guide 11 for pressing the blank W against the corner portion 11e of the prismatic guide 11,
A pressing roller 15 that presses the blank W against the four side surfaces 11 a to 11 d of the prism guide 11 is provided.

The prismatic guide 11 includes four side surfaces 11a on the outer periphery.
A blank W is wrapped around 11d to form a box-shaped body C from the blank W.
Is molded. A biting device 12 that bites the surface 1 (inner end) of the blank W is provided near the corner 11e between the side surface 11a and the side surface 11d of the prismatic guide 11. This biting device 12 is for fixing the surface 1 of the blank W to the prism guide 11, and as described later, a suction device 36 (FIG. 9) for adsorbing the surface 1 of the blank W is provided instead of the biting device 12. Good.

The prismatic guide 11 having such a structure
Is attached to the tip of the rotary leg 31 of the rotary mechanism 30 at the rotary shaft 11P.
It is held so that it can rotate around.

Further, as shown in FIGS. 2 and 3, the forming roller 14 is arranged at the tip of the rotary leg 31 of the rotating mechanism 30 so as to press the blank W against the corner portion 11e of the prismatic guide 11, and also presses it. The roller 15 is held by a bar 15b supported by the rotating shaft 11P of the prismatic guide 11. In this case, the pressing roller 15 is constantly urged toward the side surfaces 11a to 11d of the prismatic guide 11 by the spring 15a attached to the bar 15b.

Further, in the vicinity of the rotating mechanism 30, a paste is applied to the surface 2 so that the surface 6 (outer end portion) of the blank W wound around the prismatic guide 11 is attached to the surface 2. A paste application device 17 is provided. The first paste application device 17 is a prism guide 1 held by a rotating mechanism 30.
It is arranged so that it can be moved in and out of contact with 1.

Further, as shown in FIG. 1, a supply conveyor 32 for supplying the blank W to the prismatic guide 11 is installed below the rotating mechanism 30.

Next, referring to FIGS. 4 and 5, the prismatic guide 1
A pulling device 40 for pulling the box-shaped body C wound around the outer periphery of 1 from the prismatic guide 11 will be described.

The pulling device 40 is a support frame 40a installed outside the rotating mechanism 30 and having a guide rail 42.
And a cam follower 41 that moves in the guide rail 42. Of these, the support frame 40a is fixed outside the rotation mechanism 30. The cam follower 41 is provided corresponding to each prism guide 11, and while the prism guide 11 rotates (revolves) by the rotation mechanism 30, it simultaneously rotates together with the prism guide 11.
The cam follower 41 moves in the guide rail 42 of the support frame 40a during the rotational movement. In this case, the cam follower 41 moves along the longitudinal direction of the prismatic guide 11, and the box-shaped body C is pressed by the cam follower 41 and pulled out from the prismatic guide 11.

In this case, the outer surface of the box-shaped body C has the rotating mechanism 3
It is held at the tip of the rotary leg 31 of
It is adapted to be guided by a guide guide 21 provided in the vicinity of 1.

Further, as shown in FIG. 5, the prism guide 11
Since the surface 1 (inner end portion) of the blank W is bent and glued to the surface 2 in the vicinity of, the second paste application device 25
And an inner roller 22 and an outer roller 23. Both the inner roller 22 and the outer roller 23 are held at the tip of the rotary leg 31 of the rotary mechanism 30.

As shown in FIG. 5, when the blank box-shaped body C is pulled out from the prismatic guide 11 by the cam follower 41, the paste from the second paste application device 25 is applied to the surface 1 of the blank W.
And then bend side 1 against side 2. Then face 1
By sandwiching the surface 2 with the inner roller 22 and the outer roller 23, the surface 1 can be glued to the surface 2 when the box-shaped body C is pulled out.

Next, the operation of this embodiment having such a configuration will be described.

First, ruled lines K _{1 to} K ₅ as shown in FIG.
A blank W divided into six surfaces 1, 2, 3, 4, 5, 6 is prepared by.

Next, a rotating mechanism 3 for rotating the blank W.
It is supplied to the 0 side by the supply conveyor 32, and the blank W is inserted into the prismatic guide 11 located below the rotating mechanism 30. At this time, the bite device 12 is in the open state (Fig. 3).
(A)).

After that, the surface 1 of the blank W is bitten by the biting device 12 of the prismatic guide 11 located below the rotating mechanism 30 (FIG. 3 (b)). During this time, each prism guide 11 is continuously rotated in the direction of arrow L ₁ by the rotation mechanism 30 (revolution).
Then, each prismatic guide 11 rotates at the tip of the rotary leg 31 in the arrow L ₂ direction.

In this way, the blank W is attached to the prism guide 1
The blank W is wrapped around the outer periphery of the blank ₁ , and the blank W is bent along the ruled line K ₁ by the corner portion 11 e of the prismatic guide 11, and the surface 1 of the blank W is bent (folded) with respect to the surface 2. During this time, the blank W is moved by the forming roller 14 to the corner portion 11 of the prism guide 11.
By pressing against e, the bending action of the blank W can be reliably performed.

Further, by the rotating mechanism 30, the prismatic guide 11
When it revolves while revolving, the blank W is bent by the corner portion 11e of the prismatic guide 11 while being pressed by the forming roller 14 along the ruled line K ₂ . At the same time, the surface 2 of the blank W is pressed against the side surface 11a of the prismatic guide 11 by the pressing roller 15 so as not to loosen (fold). Next, the blank W is bent (folded) while being pressed by the forming roller 14 along the ruled line K ₃ . In this way, the faces 1, 2, 3, of the blank W are
4, 5, 6 are sequentially bent along the ruled lines K ₁ , K ₂ , K ₃ , K ₄ , K ₅ .

During this time, when the blank W is bent (folded) along the ruled line K ₃ by the corner portion 11e of the prism guide 11, the first glue application device 17 simultaneously approaches the prism guide 11. The first paste application device 17 is then a blank W
Glue is applied to the outer surface of the surface 2 and then separated from the prismatic guide 11. After that, the blank W is bent along the ruled line K ₅ by the corner portion 11 e of the prismatic guide 11, and the surface 6 becomes the surface 5.
When folded (folded) with respect to the surface 6, the surface 6 is pressed and glued to the surface 2 by the forming roller 14.

In this way, the box-shaped body C can be manufactured by winding the blank W around the outer periphery of the prismatic guide 11, and the surface 6 of the blank W is glued to the outer surface of the surface 2 to form the box-shaped body C. Can maintain its shape. After the surface 6 of the blank W has been glued to the outer surface of the surface 2, the bite device 12 releases the blank W.

Next, the prismatic guide 11 revolves by the rotating mechanism 30, and the cam follower 4 revolves along with the revolution of the prismatic guide 11.
1 also revolves. In this case, the cam follower 41 moves along the guide rail 42 of the support frame 40a and moves in the longitudinal direction with respect to the prism guide 11.
By moving the cam follower 41 in the longitudinal direction of the prismatic guide 11 in this manner, the box-shaped body C can be pressed by the cam follower 41 and pulled out from the prismatic guide 11. During this withdrawal, the outer surface of the box-shaped body C is guided by the guide guide 21.

At the same time, the paste is applied to the surface 1 of the blank W by the second paste application device 25, and then the surfaces 1 and 2 are nipped between the inner roller 22 and the outer roller 23.

That is, the inner roller 22 is located inside the box C, and the outer roller 23 is located outside the box C. When the box-shaped body C is pulled out from the prismatic guide 11, the surface 1 and the surface 2 are sandwiched between the inner roller 22 and the outer roller 23 so that the surface 2 can be glued to the surface 1. it can.

The box-shaped body C thus obtained is folded and pressed by a press accumulating mechanism (not shown).

As described above, according to the present embodiment, the blank W can be wound around the prism guide 11 by causing the prism guide 11 to revolve while revolving the prism guide 11 by the rotating mechanism 30. In this case, the blank W is bent along the ruled lines K _{1 to} K ₅ only by pressing the forming roller 14 and the pressing roller 15 provided outside the prismatic guide 11 against the blank W to form the box-shaped body C. Can be made. Therefore, it is not necessary to take a large work space for bending the blank W, and the entire apparatus can be downsized.

Next, a modification of the present invention will be described with reference to FIG. The modification shown in FIG. 7 uses an endless chain 35 as a rotating mechanism instead of using a plurality of rotating legs 31 extending in the radial direction from the rotation center 30a, and the other embodiments are shown in FIGS. It is almost the same as the form.

As shown in FIG. 7, a plurality of prismatic guides 11 are attached to the endless chain 35. Endless chain 35
Thus, the plurality of prismatic guides 11 move in the direction of arrow L ₃ and simultaneously rotate in the direction of arrow L ₄ .

As described above, while the prism guide 11 moves in the direction of the arrow L ₃ and rotates in the direction of the arrow L ₄ , the prism guide 1 is rotated.
The blank W is wound around the outer circumference of the No. 1 to obtain the box-shaped body C.

Incidentally, in FIG. 7, for convenience, the forming roller 1 is used.
4, the pressing roller 15, the first recoating device 17, and the supply conveyor 32 are not shown, but they are provided and operate similarly to the embodiment shown in FIG.

Next, another modification of the present invention will be described with reference to FIGS. The modification shown in FIGS. 8 and 9 is to manufacture a box-shaped body C by bending the blank W shown in FIGS. 8A, 8B, and 8C.

That is, as shown in FIGS. 8A, 8B and 8C.
The blank W has four ruled lines K ₁, K_Two, K_Three, K
_FourIs divided into 5 faces 1, 2, 3, 4, 5
It Blank folding device for bending such a blank W
Is the embodiment shown in FIGS. 1 to 6 or the modification shown in FIG.
In the shape example, the prism guide 11 shown in FIG.
Other than the above, the embodiment shown in FIGS. 1 to 6 is used.
Alternatively, it is substantially the same as the modification shown in FIG.

As shown in FIG. 9, the prismatic guide 11 has four corner portions 11e and four side surfaces 11a, 11b, 11c, 1a.
1d, and a suction device 36 for sucking the surface 1 of the blank W is provided on the side surface 11a of the prismatic guide 11.
Further, the prismatic guide 11 is rotatable about the rotation shaft 11P. A bar 15b is attached to the rotary shaft 11P, and a pressing roller 15 biased toward the prismatic guide 11 side by a spring 15a is held by the bar 15b.

The surface 1 of the blank W shown in FIG. 8A is first sucked by the suction device 36 of the prismatic guide 11, and is wound around the outer periphery of the prismatic guide 11 as the prismatic guide 11 rotates. In this way, the blank W has the ruled lines K ₁ , K
Folded sequentially along ₂ , K ₃ and K ₄ (see FIG. 8).
(B)), the box-shaped body C can be obtained from the blank W (FIG.8 (c)).

[0056]

As described above, according to the present invention,
By simply winding the blank around the prism guide and pressing the forming roller against the prism guide, the blank can be reliably bent along the ruled line. Therefore, the work space for bending the blank can be suppressed to a small size, and the overall size of the device can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of a blank folding device according to the present invention.

FIG. 2 is a view showing a prismatic guide and a forming roller.

FIG. 3 is a diagram showing an open state and a biting state of a bite device for a prismatic guide.

FIG. 4 is a view showing a device for pulling out a box-shaped body.

FIG. 5 is a view showing a box-shaped body withdrawing device.

FIG. 6 is a plan view showing a blank.

FIG. 7 is a diagram showing a modified example of the present invention.

FIG. 8 is a diagram showing a blank according to another modification of the present invention.

FIG. 9 is a diagram showing another modification of the present invention.

[Explanation of symbols]

10 Blank folding device 11 prismatic guide 11a-11d side surface 11e corner 12 Bite device 14 Forming roller 15 Pressing roller 17 First glue coating device 22 Inner roller 23 Outer roller 25 Second glue application device 30 rotation mechanism 31 rotating legs 40 Pulling device 40a support frame 41 Cam Follower 42 Guide rail W blank C box

Continued front page    F-term (reference) 3E075 AA04 AA05 BA02 CA01 DA17                       DC05 DC44 DD01 DD45 GA03                       GA04

Claims (11)

[Claims] 1. A blank bending apparatus for forming a box-shaped body by folding a blank having a ruled line along the ruled line, and a corner portion corresponding to the ruled line of the blank and a stopper for stopping an inner end of the blank. And a plurality of prismatic guides that form a box-shaped body by winding a blank around the outer periphery, a forming roller that is provided outside each prismatic guide, and presses the blank against the prismatic guides, and each prismatic guide. And a rotation mechanism for holding a forming roller corresponding to the prism guide, and a blank bending device. 2. A first paste application device for applying paste to the blank and pasting the outer end of the blank to the outside of the prism guide held by the rotating mechanism. Blank folding device as described. 3. A blank folder according to claim 1, further comprising a pulling device for pulling out a box-shaped blank wound around the prism guide near the prism guide held by the rotating mechanism. Bending device. 4. The drawing device has a support frame provided outside the rotating mechanism and having a guide rail, and a cam follower that moves along the guide rail of the support frame and pushes out a box-shaped blank. 4. The blank folding device according to claim 3, which is characterized in that. 5. A second paste application for applying a paste to the inner end of a box-shaped blank drawn by a drawing device near the prism guide held by a rotating mechanism and affixing the inner end of the blank. The device according to claim 3, further comprising a device.
Blank folding device as described. 6. An inner roller and an outer roller, which are located inward and outward of the inner end of the blank and sandwich the inner end of the blank, are provided in the vicinity of the second paste coating device. The blank folding device according to claim 5. 7. The blank folding device according to claim 1, wherein the prismatic guide is rotatably held by a rotating mechanism. 8. The blank folding device according to claim 1, wherein the stopper comprises a blank suction device. 9. The blank folding device according to claim 1, wherein the stopper comprises a blank bite device. 10. The rotating mechanism comprises a plurality of rotating legs extending in the radial direction from the center of rotation, and each prismatic guide and a forming roller corresponding to the prismatic guide are provided at the tip of each rotating leg. The blank folding device according to claim 1. 11. The blank folding apparatus according to claim 1, wherein the rotating mechanism comprises a rotating endless chain, and each prism guide and a forming roller corresponding to the prism guide are provided in the endless chain.