JP3208778B2 - Sheet material creasing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for forming a fold on a sheet material such as cardboard, for example, when forming a paper container by bending and forming a punched blank. By being provided, it is used to facilitate bending.

[0002]

2. Description of the Related Art For example, a sack machine is used for mass-producing paper containers from blanks.

However, at a work site where a paper container is designed, it is necessary to manually bend the sheet material to form a paper container. In such a case, a concave portion serving as a fold is formed in the sheet material to facilitate bending.

Specifically, a sheet material 1 as shown in FIG.
When a paper container is formed by folding the paper container 01, a concave portion serving as a fold is formed in a bent portion 101a indicated by a broken line in the figure. In this case, when the upper side in the figure of the sheet material 101 in FIG. 8 is set as the surface, the concave portion 102 serving as a fold is provided on the surface side of the sheet material 101, and then the sheet is bent as shown by a virtual line in FIG. And sheet material 10
The surface of 1 is the outer surface of the paper container. Thus, the sheet material 10
The concave portion 102 is formed on the front surface side of the substrate 1 because a printed layer or a resin coating layer is formed on the front surface side. This is because cracks may enter the resin coating layer.

[0005] Since it is difficult to form such a concave portion 102 serving as a fold by hand, FIGS.
Has been used.

The fold imparting device 103 includes a mounting table 104 for a sheet material, and a pressing body 105 that moves up and down with respect to the mounting table 104. The mounting table 104 is provided with a convex portion 106 projecting upward, and the pressing body 105 is provided with a groove 107 opening downward.

[0007] Then, the sheet material 101 is placed on the mounting table 104, and the pressing member 105 is lowered to push down the sheet material 101, and the sheet material 101 is pushed by the convex portion 106.
Is pressed into the groove 107 to form the concave portion 102 serving as a fold.

Further, the hardness of the sheet material 101 varies depending on the material, and the hardness varies depending on the fiber direction of the sheet material 101. Therefore, the width of the groove 107 can be changed and adjusted so that the recess 102 having a constant width can be formed regardless of the hardness of the sheet material 101. For this purpose, the pressing body 105 has a built-in adjustment mechanism for changing the groove width. Adjustment handles 109 and 110 are provided at one end and the other end in the width direction, and the groove width is adjusted by rotating the handles 109 and 110. I was

[0009]

In the conventional crease applying device 103, since the convex portion 106 is provided on the mounting table 104 and the groove 107 is provided on the pressing body 105, the concave portion is provided on the surface of the sheet material 101. To form 102,
It is necessary to place the sheet material 101 on the mounting table 104 with the surface facing downward.

[0010] Then, a ruled line is drawn on a portion 101a of the surface of the sheet material 101, which is to be a fold, but the operator cannot see the ruled line because the surface faces downward. Therefore, in order to align the fold part 101a of the sheet material 101 with the projection 106, the fold part 101a of the sheet material 101
It was necessary to work to insert a notch serving as a mark from the front surface to the back surface. Specifically, as shown in FIG. 13, a sheet material 1 on which a printing layer and a resin coating layer are formed
A ruled line 115 representing the developed shape of the paper container according to the design and a ruled line (shown by a dashed line in the figure for convenience) 116 representing a fold are drawn on the surface of 01. And the fold 111a
A notch 117 for positioning is formed at a position corresponding to the portion to be formed. Accordingly, even when the surface of the sheet material 101 is directed downward as shown in FIG.
17 allows the operator to recognize the portion 101a to be a fold. Then, the concave portion 102 serving as a fold
Is formed, the sheet material 101 is cut along the developed shape of the paper container to form a paper container. As described above, the formation of the notch 117 for alignment is necessary, so that the paper container forming process is very complicated.

If the width of the groove 107 of the crease applying device 103 does not correspond to a slight difference in the hardness of the sheet material 103, when the pressing member 105 is lowered to push down the sheet material 101, The material 101 is in the width direction of the groove 107 (FIG. 9).
At the right and left directions), and an accurate fold could not be provided. In addition, since the groove 107 is located on the lower surface side of the pressing body 105, the operator cannot visually confirm the width of the groove 107, so that skill and time are required to adjust the width of the groove 107.

As described above, in order to enable the width of the groove 107 to be changed and adjusted, it is necessary to incorporate the adjustment mechanism inside the pressing body 105. Therefore, the pressing body 105
Has increased in the groove width direction, and has prevented the worker from seeing the protrusion 106 from directly above. Accordingly, when aligning the notch indicating the fold formed on the sheet material 101 with the protrusion 106, the position of the operator's eye 108 is obstructed by the pressing body 105 as shown in FIG. Therefore, it becomes obliquely upward with respect to the convex portion 106. Therefore, skill is required to accurately perform the alignment. In particular, when the thickness of the sheet material 101 is large or when a plurality of sheet materials are creased all at once, it is extremely difficult to perform positioning from diagonally above.

An object of the present invention is to provide a sheet material folding apparatus which can solve the above-mentioned problems of the prior art.

[0014]

A feature of the present invention is a crease applying device for forming a concave portion which is a fold in a sheet material, the mounting table for the sheet material, and a vertical movement with respect to the mounting table. The mounting table is provided with a groove having an upward opening so as to be changeable in width, and the pressing body is provided with a convex portion projecting downward , along the longitudinal direction of the groove.
The rotation axis is set on the mounting table side so that it can be rotated by pedal operation.
The rotation of the rotating shaft is converted into the movement of the pressing body.
A crank mechanism is provided, which is operated by the rotation of its rotating shaft.
A cam is provided to define the moving direction of the moving pressing body.
The pressing body, the movement direction of which is defined by the cam, can be moved in the groove width direction from a position immediately above the mounting table to a position where it can be viewed from directly above the mounting table, and the position of the folding line is directly above the mounting table. The pressing body moved in the groove width direction to a position where it can be viewed from above can be moved straight above the part to be creased and then lowered straight down , and the pressing body is moved
By lowering the sheet material into the groove by the convex part
It can be pushed in .

[0015]

[0016]

According to the structure of the present invention, since the mounting table is provided with the upward opening groove and the pressing body is provided with the downwardly projecting convex portion, a concave portion serving as a fold is formed on the surface of the sheet material. In this case, the sheet material may be placed on the mounting table with the surface of the sheet material as the upper surface.

This makes it possible to align the groove with the groove using the ruled line drawn on the fold on the surface of the sheet material, and it is necessary to make a notch as a mark on the fold of the sheet material as in the related art. Disappears.

Further, since the pressing member is provided with the convex portion, when the pressing member is lowered to push down the sheet material and to push the sheet material into the groove by the convex portion, the sheet material is displaced in the groove width direction. It is less likely to occur than before.

This is because, when the pressing body is provided with a groove as in the prior art, as shown in FIG. 10, the sheet material 101 has a convex portion 106 at the widthwise inner portion 101a of the groove 107.
Try to enter the groove 107 along the
7, the outer portion 101b in the width direction tries to move outward in the width direction of the groove 107 as indicated by an arrow in the figure.

On the other hand, as shown in FIG. 9, when the pressing member is provided with the convex portion 15, the entire sheet material 101 tends to enter the groove 16. Accordingly, the sheet material 101 is less likely to shift in the width direction of the groove 16 as compared with the related art.

Further, since the width-changeable groove is provided on the mounting table, a mechanism for changing the width can be provided on the mounting table, and the mechanism can be built into the pressing body as in the prior art. The dimension of the pressing body in the groove width direction can be reduced. Thereby, when aligning the sheet material with the groove of the mounting table, the portion to be folded can be visually observed from almost directly above.

Further, when the pressing body moves in the groove width direction with respect to the mounting table, when the sheet material is aligned with the groove of the mounting table, a portion to be folded can be completely visually observed from directly above. The fold is visible from directly above
The pressing body that has moved in the groove width direction to the position
It can be moved straight down and then straight down
By being able to do so, the concave portion can be reliably formed.

[0023]

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

The folding device 1 shown in FIG.
And a pressing body 3 that can move up and down with respect to the mounting table 2.

The mounting table 2 is supported by a pair of left and right legs 4. The legs 4 are mounted on the floor F via screws 5 for height adjustment.

A rotating shaft 6 is rotatably supported by the pair of left and right legs 4. As shown in FIG. 4, a foot pedal 7 is attached to the rotating shaft 6, and a weight 8 is attached to the pedal 7. In addition, a spring 60 for urging the pedal 7 in the depressing release direction is bridged between the pedal and the mounting table 2.

Arms 9 are attached to both ends of the rotating shaft 6, and a crank rod 10 is attached to each arm 9 so as to be relatively rotatable. A connection block 11 is attached to the upper end of each crank rod 10. Each connecting block 11 is connected to both ends of the pressing body 3.

Also, as shown in FIG.
A pair of upper and lower rollers 12 is rotatably mounted on the left and right outer end surfaces around the left-right axis. The roller 12 is inserted into a cam groove 14 formed in a cam plate 13 fixed to the mounting table 2 described above.

The cam groove 14 is formed by an inclined portion 14a which is inclined forward (to the right in FIG. 4) as it goes from above to below, and a straight portion 14b which goes straight downward from the lower end of the inclined portion 14a. Have been.

Thus, when the foot pedal 7 is not depressed, the weight of the weight 8 provided on the pedal 7 causes the rotary shaft 6 to position the crank rod 10 at the uppermost position. In this position, the roller 12 of the connection block 11 is located at the uppermost position of the cam groove 14.

When the rotary shaft 6 is rotated by depressing the pedal 7 from this state, the rotation is transmitted to the connecting block 11 via the arm 9 and the crank rod 10, and the roller 12 provided on the connecting block 11 Move in. Thus, the pressing body 11 connected to the connecting block 11 first moves forward along the inclined portion 14a of the cam groove 14 and then moves down along the straight portion 14b.

At the lower end of the pressing body 3, a convex portion 15 is provided so as to protrude downward as shown in FIG. The convex portion 15 is formed in a linear shape along substantially the entire left and right width of the mounting table 2.

The mounting table 2 has a groove 1 having an upward opening.
6 are provided. The groove 16 has a linear shape along the entire left and right width of the mounting table 2, and the groove width can be changed.

The groove 16 is provided with a pair of front and rear rocking members 17, 1
8 are formed between the facing portions. Each of the oscillators 17 and 18
Inside the housing 19 attached to the lower surface of the mounting table 2, it is supported by a pair of front and rear support blocks 20 and 21.

That is, the oscillating members 17 and 18 are plate-like elongated in the left and right directions, and are mounted on the upper surfaces of the support blocks 20 and 21 so as to face front and rear (left in FIG. 1 is front). . The upper surfaces of the support blocks 20, 21 are inclined surfaces 20a, 2a,
1a, one oscillator 17 is mounted on one inclined surface 20a, and the other oscillator 18 is mounted on the other inclined surface 21a. Further, stopper portions 20b and 21b provided in connection with the inclined surfaces 20a and 21a support the front end of one of the oscillators 17 and the rear end of the other oscillator 18.

As shown in FIG. 3, a pair of left and right protruding shafts 22 are arranged below both the swinging members 17 and 18 and between the two support blocks 20 and 21 as opposed to each other. Each push-up shaft 22 has a vertical axis, and the housing 19
And is inserted into a cylindrical body 24 extending downward. A nut 25 is attached to the lower end of the cylindrical body 24, and a male screw 26 formed on the outer periphery of the lower end of the protruding shaft 22 is attached to the nut 25.
Are screwed together.

A timing pulley 27 is attached to the lower end of each push-up shaft 22, and a timing belt 28 is wound around both timing pulleys 27. An operation handle 29 is attached below the right timing pulley 27.

Thus, when the operating handle 29 is rotated, the right upright shaft 22 rotates, and this rotation is transmitted to the left upright shaft 22 via the timing belt 28, and The shaft 22 moves up and down. Each of these raised shafts 2
A projecting body 50 that swings the swinging bodies 17 and 18 by the up and down movement of 2 is provided above each projecting shaft 22.

Each of the push-up bodies 50 is provided between the swinging members 17 and 18 and the push-up shaft 22 and is supported by the step 22a of the push-up shaft 22 via a compression coil spring 51.

When each push-up shaft 22 moves upward, each push-up body 50 pushes up the opposing ends of both swinging members 17 and 18 upward. Then, as shown by the phantom line in the figure, each of the oscillators 17, 18 is moved to the stopper portions 20b, 21b.
Swings with the portion supported by the fulcrum as a fulcrum. Due to this swing, the width of the opposed space between the two swinging bodies 17 and 18, that is, the width of the groove 16 is changed. Thus, by rotating the single handle 29, the width of the groove 16 is changed and adjusted. The springs 30 and 31 are configured to urge the opposing ends of the oscillators 17 and 18 downward.
And the housing 19.

A positioning scale 32 is arranged behind the pressing body 3. This positioning scale 32
Is a plate-like member extending over substantially the entire width of the mounting table 2 and is attached to a support plate 33 via a hinge 34 so as to be vertically movable. The support plate 33 is located behind the scale 32 and has an arm 35 projecting upward from both left and right ends thereof. Both arms 35 are connected to the cam plate 13 via a support shaft 36.
Is mounted to be swingable about the center in the left-right direction. Thus, the positioning scale 32 can swing back and forth about the center of the support shaft 36.

The positioning scale 32 is located at the forefront, and its front end surface is along the center bisecting the groove 16 back and forth.

The arm 35 has a stopper 37
The stopper 37 is attached to the connection block 1.
By abutting on the rear end of 1, the positioning scale 32 is located at the forefront.

Further, a tension spring 61 is bridged between the stopper 37 and the positioning scale 32 so that there is a space between the positioning scale 32 and the mounting table 2 in which the sheet material 101 can be inserted. , Its scale 3
2 has been raised. Thus, by aligning the ruled line drawn on the fold 101 a on the surface of the sheet material 101 with the front end of the positioning scale 32, the positioning of the sheet material 101 with respect to the groove 16 can be performed.

In order to prevent the positioning scale 32 from swinging at the time of the positioning, a pressing rod 38 for pressing the scale 32 from above is provided as shown in FIG. The pressing rod 38 is rotatably mounted on the cam plate 13 about a horizontal axis 39.
Then, the scale 32 is pressed against the upper surface of the sheet material 101 mounted on the mounting table 2 by the rear end of the pressing rod 38 by holding the front end of the pressing rod 38 by hand and pushing it up. This pressing force is set to a magnitude that can move the sheet material 101 on the upper surface of the mounting table 2 for positioning.
A fixing tongue 40 protrudes from the pressing rod 38, and the tongue 40 is releasably clamped between the forked holding members 41 attached to the cam plate 13. Thereby, the pressing rod 38 can be fixed to the pressing position of the scale 32.

As shown in FIG. 6, a scale 42 capable of measuring the dimension in the front-rear direction is provided on the front side of the mounting table 2. As a result, a plurality of front and rear folds along the left and right direction and parallel to each other are formed.
When the first fold is provided, the alignment between the sheet material 101 and the groove 16 may be performed only when the first fold is provided. .

A groove 44 for fixing the stopper 43 is formed on the rear side of the mounting table 2. As a result, a plurality of sheet materials 101 are provided with concave portions 102 serving as folds.
When the first sheet material 101 is formed, the first sheet material 101 is aligned with the groove 16 and the stopper 43 is fixed in accordance with the position. By simply pressing the rear end face of the sheet material 101 against the stopper 43, the positioning with the groove 16 can be performed.

In order to form the concave portion 102 serving as a fold in the sheet material 101 by the above configuration, first, the sheet material 101
A ruled line is drawn on a portion 101a that is to be a fold on the surface of.

Next, the sheet material 101 is placed on the placing table 2 with its surface facing upward.

Next, the ruled line drawn on the surface of the sheet material 101 is aligned with the center which bisects the groove 16 back and forth. At this time, the pressing body 3 is located at the uppermost position as shown by the imaginary line in FIG. 1, and the pressing body 3 is located behind the groove 16. And the center can be visually confirmed, and the alignment can be performed reliably. In addition, by aligning the ruled line of the sheet material 101 with the front end surface of the positioning scale 32, the positioning can be performed more accurately.

Next, the pressing body 3 is lowered by depressing the pedal 7. When the roller 12 reaches the foremost position of the inclined portion 14a of the cam groove 14 and the uppermost position of the straight portion 14b during the lowering of the pressing body 3, as shown in FIG. The center and the center that bisects the groove 16 back and forth coincide

When the pedal 7 is further depressed, the pressing body 3 descends straight, so that the convex portion 15
01 is pushed into the groove 16. Thereby, a concave portion 102 serving as a fold is formed in the sheet material 101. At this time, the lower end of the rear surface of the connecting block 11 pushes the inclined upper surface 37a of the stopper 37, so that the arm 35 is moved as shown in FIG.
As shown by the imaginary line in FIG. 5, the positioning scale 32 also swings rearward, so that the projection 15
Is not obstructed by the positioning scale 32.

According to the above structure, the sheet material 101 is placed on the mounting table 2 with the surface of the sheet material 101 as the upper surface, and the concave portion 10 serving as a fold is formed.
2 can be formed, so that it is not necessary to turn the sheet material 101 back as in the related art, and it is not necessary to make a cut to serve as a fold mark, and the work efficiency can be improved.

Since the pressing body 3 can be moved not only vertically but also in the width direction of the groove 16, the sheet material 101 and the groove 1 can be moved.
At the time of alignment with 6, the positioning ruled line drawn on the sheet material 101 and the groove 16 can be seen from directly above, and positioning can be performed reliably.

Further, even if the pressing body 3 does not move in the width direction of the groove 16, a mechanism for adjusting the width of the groove 16 is required.
Since it is provided on the mounting table 2 side, the dimension of the pressing body 3 in the front-rear direction can be reduced, and when the sheet material 101 and the groove 16 are aligned, the portion to be a fold is substantially straight up from above. It can be seen and the alignment can be assured.

Further, the width adjusting mechanism of the groove 16 can uniformly adjust the width of the elongated groove to the left and right by simply rotating the single handle 29. The groove width can be adjusted more quickly than when the groove width is adjusted by rotating the groove.

[0057]

According to the present invention, when forming a concave portion serving as a fold in a sheet material, the surface of the sheet material can be placed on a mounting table with its surface as an upper surface, and a mark can be formed on a fold portion as in the prior art. It is not necessary to make a cut, and the work can be speeded up.

Further, when forming the concave portion serving as a fold, since the sheet material is less likely to shift in the width direction of the groove as compared with the related art, the groove width adjustment according to the difference in the hardness of the sheet material. Can be provided with an accurate fold without performing strictly as in the prior art, and the operation can be performed accurately and quickly.

Further, since the groove width direction adjusting mechanism can be provided on the mounting table, the dimension of the pressing body in the groove width direction can be made smaller than before, and the positioning of the sheet material with the groove of the mounting table can be performed. In this case, the portion to be folded can be viewed from almost directly above, and the alignment can be performed accurately. Furthermore, since the pressing body can be moved in the groove width direction, when the positioning is performed, the portion to be folded can be completely viewed from directly above, and the positioning can be performed accurately. . Completely make the fold
Pressing body moved so that it can be seen straight from above
Moves straight above the fold,
By descending directly, the creases can be reliably formed.
Wear.

Further, since the groove is provided on the mounting table, the groove width can be visually checked, and the adjustment of the groove width can be speeded up. Moreover, it is necessary to achieve the above effects.
Movement of the pressing body can be realized at low cost with a simple configuration.
You.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part of a crease applying apparatus according to an embodiment of the present invention.

FIG. 2 is a plan view of a crease applying apparatus according to an embodiment of the present invention.

FIG. 3 is a front view of the crease applying apparatus according to the embodiment of the present invention.

FIG. 4 is a side view of the crease applying apparatus according to the embodiment of the present invention.

FIG. 5 is a partial cross-sectional side view of the crease applying apparatus according to the embodiment of the present invention.

FIG. 6 is a plan view of a mounting table of the creasing device according to the embodiment of the present invention.

FIG. 7 is a plan view of a sheet material.

FIG. 8 is an explanatory diagram of an operation of folding a sheet material.

FIG. 9 is a diagram illustrating the operation of the present invention.

FIG. 10 is a diagram illustrating the operation of a conventional example.

FIG. 11 is a configuration explanatory view of a crease applying device according to a conventional example.

FIG. 12 is a configuration explanatory view of a crease applying device according to a conventional example.

FIG. 13 is an explanatory view of a conventional crease providing step.

FIG. 14 is an explanatory view of a conventional crease applying step.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Folding apparatus 2 Mounting table 3 Pressing body 15 Convex part 16 Groove 101 Sheet material 102 Concave part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-74343 (JP, A) JP-A-52-136084 (JP, A) JP-A-64-26432 (JP, A) 169319 (JP, U) Patent 93279 (JP, C2) (58) Fields investigated (Int. Cl. ⁷ , DB name) B31B 1/25 301 B31B 1/20

Claims (1)

(57) [Claims] 1. A crease forming device for forming a concave portion serving as a fold in a sheet material, comprising: a mounting table for the sheet material; and a pressing body movable up and down with respect to the mounting table. A groove of the opening is provided so that the width can be changed, and a convex portion protruding downward is provided on the pressing body, and the longitudinal direction of the groove is provided.
The rotation axis along the direction is rotatable by pedal operation.
The rotation of the rotation shaft provided on the table side
Is provided, and the rotation of the rotating shaft is provided.
A cam that regulates the direction of movement of the pressing body
The pressing body whose moving direction is defined by the cam can be moved in the groove width direction to a position where a portion to be folded with respect to the mounting table can be viewed from directly above, and the portion to be folded can be moved. pressing body moved to the groove width direction from straight upward to a position that allows visual is a straight lowerable after moving straight upper portion serving as the crease, the
By lowering the pressing body, the sheet material is moved forward by the convex portion.
A sheet material creasing device which is capable of being pushed into a groove .