JPH0699078B2 - Folding device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a device for folding a paper napkin or the like.

(Prior Art) When folding a conventional paper napkin or the like, a vertically long work 16 is conveyed in the vertical direction (arrow X direction) as shown in FIG.
The position of about l / 3 is pushed up from below (arrow Y) with respect to the total length 1 of the work 16 conveyed in the vertical direction. Then, one end of the work 16 is bent as indicated by the arrow A1, the push-up Y1 is retracted, and then the work 16 is bent up to the arrow A2. After that, the other end of the work 16 was bent up to the arrow A3, pushed up to retract the Y2, and then bent up to the arrow A4.

(Problems to be Solved by the Invention) In the above-described conventional folding apparatus, since the posture of the conveyed work is the vertical direction, the work conveyance pitch interval can be set to the work length l or less. However, there is a problem that the amount of conveyance per unit time is small and the productivity is low.

Also, if the timing of pushing up for giving a fold line of the work deviates from the conveyance speed of the work, the folds will be uneven, and sometimes creases will occur, resulting in poor appearance and low product value. There was a problem.

Further, since the push-up from below is retracted midway, there is nothing that regulates the fold line from the middle of folding. As a result, there is a problem in that the folding becomes uneven and the appearance is deteriorated, which lowers the product value.

(Means for Solving the Problem) In order to solve the above problem, the present invention provides a first conveyor belt, a guide plate and a second conveyor belt in series along the conveyance direction of a work, and the first conveyor belt and the guide. Board and second
A third conveyor belt is provided above the conveyor belt with a certain space between the conveyor surfaces, and is held on both sides of the guide plate from the carry-out end of the first conveyor belt to the carry-in end of the second conveyor belt. A belt and a lower holding belt are provided, and the folding curved surface of the rotor provided with the folding curved surface and the first feeding are provided on both sides of the first conveying belt and close to the ends of the upper holding belt and the lower holding belt. A vertical bending portion is formed by providing a rotor with a certain gap between the belt and the side edge of the belt. A horizontal folding blade is provided around the horizontal folding blade to form a horizontal bending portion, and the center of rotation of the horizontal folding blade is displaced by a certain distance in the workpiece conveying direction. Set a constant distance between the back of the board and Rutotomoni, a predetermined distance in the vertical direction between the back and the other horizontal folding blades of the water Hirori vanes provided,
The rotating tip of the lowermost horizontal folding blade is close to the carry-in end of the second conveyor belt.

(Operation) Since the present invention is configured in this way, it has the following operations. That is, since the rotor is provided with a certain gap between the folded curved surface of the rotor having the folded curved surface and the side edge of the first conveyor belt, the vertical bending portion is formed. While applying the bent parts of the work that have been conveyed to both sides of the work piece in a state of protruding to approximately 1/3 of the length of the work on the edges of both sides of the first conveyor belt, It is possible to fold vertically downward.

Since the rotors are provided on both sides of the first conveyor belt and close to the ends of the upper holding belt and the lower holding belt, the posture of the work bent vertically downward is changed to the upper holding belt. It is possible to transfer the work while holding it with the lower holding belt.

Horizontal folding blades are provided on opposite sides of the lower side of the guide plate that rotate around a vertical axis in the workpiece conveying direction to form a horizontal bending portion, and the rotation center of the horizontal folding blades is set in the workpiece conveying direction. Since they are displaced by a certain distance, one side of the guide plate is pressed while applying the bent part of the vertically bent end of the workpiece transferred while holding it by the upper holding belt and the lower holding belt to the guide plate. It is possible to fold horizontally from the edge to the other side edge in sequence.

A constant gap is provided between one of the horizontal folding blades provided on both sides of the guide plate and the back surface of the guide plate, and a constant vertical distance is provided between the back surface of the horizontal folding blade and the other horizontal folding blade. Since the space is provided, it is possible to maintain the posture of the work folded in three as it is and hold it by the guide plate and the two horizontal folding blades, and the rotation tip of the lowermost horizontal folding blade is Since the horizontal folding blade is close to the carry-in end of the second conveyor belt and rotates in the workpiece conveying direction, the horizontal folded blade is transferred to the second conveyor belt while maintaining the posture of the three-folded workpiece. It will be possible.

Then, a first conveyor belt, a guide plate, and a second conveyor belt are provided in series along the workpiece conveying direction, and are fixed above the first conveyor belt, the guide plate, and the second conveyor belt between the respective conveyor surfaces. Since the third conveyor belt is provided at an interval of, and the upper holding belt and the lower holding belt are provided on both sides of the guide plate from the carry-out end of the first conveyor belt to the carry-in end of the second conveyor belt, Bend both ends of the work carried in to the conveyor belt vertically downward at the vertical bending parts, and guide them on the guide plate while maintaining this posture, and use the upper holding belt and the lower holding belt to reach the horizontal bending part. It becomes possible to carry the rake and carry it out while being held between the second belt and the third belt while maintaining the posture of being folded in three at the horizontal bending portion.

(Example) Hereinafter, one example of the present invention will be described in detail. First, folding of a work (for example, a paper napkin) will be described with reference to FIG.

In FIG. 6A, the work 16 is conveyed laterally with respect to the first conveyor belt 5. Then, the first conveyor belt 5
The width W of the work 16 is set to be approximately l / 3 of the length l of the work 16, and the work 16 is positioned at the center, so that both ends of the work 16 come out by l / 3 on both sides of the first conveyor belt 5.

Next, in (B), the fold line is regulated by the first conveyor belt 5 or the guide plate 15 of the first conveyor belt, and the work 16 is bent at the vertical bending portion. Next, in (c), it is folded horizontally by the horizontal folding blade 17. The fold line at this time is regulated by the guide plate 7. It should be noted that the horizontal bending portion does not have the first conveyor belt 5 but only the guide plate 7. The transfer is performed by a third transfer belt (not shown).

Next, as shown in (d), the work 16 that has been completely bent is guided by the guide plate 7 and the horizontal folding blade 17 to the second conveyor belt 6.
And the third conveyor belt 8 are delivered.

In FIG. 1, 1 is a vertical bending portion, 2 is a horizontal bending portion, and the vertical bending portion 1 and the horizontal bending portion 2 are provided in this order with respect to the flow direction of the work. Reference numeral 3 denotes an upper holding belt, and 4 denotes a lower holding belt, which are provided from the work outlet of the vertical bending portion 1 to the work outlet of the horizontal bending portion 2. Reference numeral 5 is a first conveyor belt, 6 is a second conveyor belt, and the first and second conveyor belts 5 and 6 do not extend to the horizontal folding portion 2 but the horizontal folding portion 2 It does not interfere with the rotation of the horizontal folding blade 17. Reference numeral 8 denotes a third conveyor belt, which is provided long along the vertical bending portion 1 and the horizontal bending portion 2. 11 is a conveyor belt and 12 is a carry-out belt. Reference numeral 10 is a drive device for the horizontal folding blade, and 9 is a drive device for rotating the rotor 1 ′ of the vertical bending portion 1.

In FIG. 2, the vertical bending portion 1 includes a folding curved surface 13 and a first bending surface 13.
It is provided on both sides of the first conveyor belt 5 so as to face each other with a constant gap (determined by the thickness of the work) between both edges of the conveyor belt 5. Reference numeral 7 is a guide plate provided between the first and second conveyor belts 5 and 6 and located at the horizontal bending portion 2, and the surface height of the guide plate is the same as that of the first and second conveyor belts. The heights of the conveying surfaces of the belts 5 and 6 are almost the same.

The horizontal folding portion 2 is provided with two horizontal folding blades 17 that rotate about a rotation center P on both sides of the guide plate 7 in two stages. That is, as shown in FIG. 5, one horizontal folding blade 17 is provided with a gap corresponding to the thickness of the work 16 provided between the back surface of the guide plate 7 and the back surface of the horizontal folding blade 17. Another horizontal folding blade 17 is provided in two stages with a gap corresponding to the thickness of the work 16 provided therebetween. The center of rotation P is deviated by the dimension l in the work transfer direction as shown in FIG. Then, as shown in FIG. 2, the tip of the virtual imaginary circle of the horizontal folding blade 17 on the side where the center of rotation is displaced by the dimension l toward the second conveyor belt 6 is close to the loading side of the second conveyor belt 6. The upper and lower holding belts 3 and 4 are provided on both sides of the first and second conveyor belts 5 and 6 and the guide plate 7.

The operation of the present embodiment having the above structure will be described below. 1 and 2, the first conveyor belt 5
The work 16 that has been conveyed in a state in which approximately 1/3 of the length of the work 16 is projected on both sides of the work 16 is bent at the vertical bending portion 1. That is, the folded curved surface 13 is provided on both sides of the first conveyor belt 5.
And a rim of the first conveyor belt 5 (work 16
Since the rotor 1'is provided with a gap (corresponding to the thickness of 1), it is carried in by being sandwiched between the first conveyor belt 5 and the third conveyor belt 8 as shown in FIG. The work 16 hits the rotor 1'rotating in the direction of the arrow and is deformed as shown in (b).

Then, as the rotor 1 ′ further rotates, the work
The protruding ends of 16 are bent vertically downward by the arcuate folding surface 13. The fold at this time is given by the first conveyor belt 5 or the guide plate 15 of the first conveyor belt. In the figure, 14 is a guide plate for the third conveyor belt 8.

As shown in FIG. 2, the work 16 bent in this way has a width W of the folding curved surface 13 and the carrying-in side end portions of the upper holding belt 3 and the lower holding belt 4 are bent in the vertical direction. Since the work 16 is close to the unloading side, the work 16 is transferred to the upper and lower holding belts 3 and 4 in a state where the work 16 is held in the bent shape at the vertical bending portion 1. At this time, the work 16 is conveyed by the first conveyor belt 5 and the third conveyor belt 8 because the third conveyor belt 8 is provided on the first conveyor belt 5 at a constant interval.

In this way, the work 16 transferred to the upper and lower holding belts 3 and 4 is in a state of being held by the upper holding belt 3 and the lower holding belt 4 in a shape bent at the vertical bending portion 1. It is carried into the horizontal folding section 2.

As shown in FIG. 4, the work 16 carried in the horizontal bending portion 2 is horizontally folded by the horizontal folding blade 17. That is, since the center of rotation of the horizontal folding blade 17 is displaced by 1 in the carrying direction and the horizontal folding blade 17 rotates in the carrying direction (arrow direction), the workpiece 16 being carried is first shown on the left side of the drawing. One end is bent by the horizontal folding blade 17, and then the other end is horizontally bent by the horizontal folding blade 17 on the right side of the drawing.

At the time of this horizontal bending, as shown in FIG. 5, one horizontal folding blade 17 is provided with a gap corresponding to the thickness of the work 16 provided between the back surface of the guide plate 7 and this horizontal folding blade 17 Since another horizontal folding blade 17 is provided in two steps with a gap corresponding to the thickness of the work 16 being provided between the back surface of the work piece 16 and the back surface of the work piece 16, the fold line of the work piece 16 is provided by the edge of the guide plate 7, and The horizontally folded work 16 is held in a state of being sandwiched by the third conveyor belt 8, the guide plate 7 and the horizontal folding blade 17, and the side surface is held by the upper holding belt 3.

Since the horizontal folding blade 17 rotates in the carrying direction, the work 16 folded in three can be carried by the third carrying belt 8 and the upper holding belt 3.

Further, since the horizontal folding blade 17 rotates in the transport direction, and the tip of the imaginary circle of rotation of the horizontal folding blade 17 is close to the loading side of the second transport belt 6, a state in which the folded shape is held in three is maintained. Thus, it can be transferred between the second conveyor belt 6 and the third conveyor belt 8.

In the above description, a guide plate may be provided instead of the upper holding belt 3 and the lower holding belt 4.

(Effects of the Invention) As described in detail above, according to the present invention, the rotor is provided with a certain gap between the folding surface of the rotor having the folding surface and the side edge of the first conveyor belt. Since the vertical bending portion is formed, the length of the work can be reduced on both sides of the first conveyor belt.
It is possible to bend vertically downward with the folding surface of the rotor while applying the bending part of the work that has been laterally conveyed in a state of protruding to 1/3 length to both edges of the first conveyor belt. .

Since the rotors are provided on both sides of the first conveyor belt and close to the ends of the upper holding belt and the lower holding belt, the posture of the work bent vertically downward is changed to the upper holding belt. The work can be transferred while being held by the lower holding belt.

In addition, horizontal folding blades that rotate around a vertical axis in the workpiece conveying direction are provided on opposite sides of the lower side of the guide plate to form a horizontal bending portion, and the center of rotation of the horizontal folding blades is used to convey the workpiece. Since it is offset by a certain distance in the direction, while holding the upper holding belt and the lower holding belt, the bent portion of the vertically bent end of the transferred work is applied to the guide plate while It can be bent horizontally from one side edge to the other side edge.

A constant gap is provided between one of the horizontal folding blades provided on both sides of the guide plate and the back surface of the guide plate, and a constant vertical distance is provided between the back surface of the horizontal folding blade and the other horizontal folding blade. Since the three folded work pieces can be held by the guide plate and the two horizontal folding blades, the rotation tip of the lowermost horizontal folding blade is set to the second position. Near the carry-in end of the conveyor belt,
Since the horizontal folding blade is rotating in the direction of conveyance of the work, the second folding is performed while the posture of the work folded in three is maintained.
Can be delivered to a conveyor belt.

Then, a first conveyor belt, a guide plate, and a second conveyor belt are provided in series along the conveyance direction of the work, and above the first conveyor belt, the guide plate, and the second conveyor belt, there is a fixed distance between the respective conveyor surfaces. Since the third conveyor belt is provided at an interval of, the upper holding belt and the lower holding belt are provided on both sides of the guide plate from the carry-out end of the first conveyor belt to the carry-in end of the second conveyor belt. Both ends of the work carried in to the belt are bent vertically downward at the vertical bending parts, guided to the guide plate while maintaining this posture, and transferred to the horizontal bending part by the upper holding belt and the lower holding belt. However, the work can be carried out while being sandwiched between the second belt and the third belt while maintaining the posture of being folded in three at the horizontal folding portion.

As a result, it is not necessary to match the work transfer speed with the crease alignment timing, so that there is no bending failure due to the timing deviation as in the conventional case, and the product value can be greatly improved. Further, the conveyance pitch can be shortened to increase the conveyance amount, and the productivity can be greatly improved.

[Brief description of drawings]

1 to 6 show an embodiment of the present invention. FIG. 1 is a side view of a folding device, FIG. 2 is a plan view of FIG.
FIG. 3 is a diagram for explaining the operation of the bent portion in the vertical direction.
Shows a state in which the work is inserted, (b) shows a state in which the work is deformed by the rotor, and (c) shows a front view showing the state in which the work is bent along a folding curved surface. FIG. 4 shows the horizontal bending portion. FIG. 5 is a plan view showing the operation, FIG. 5 is a front view of a horizontal bending portion, and FIG. 6 is a view for explaining a process in which the work is bent, (a) is a state before bending, (b) FIG. 4 is a perspective view showing a state of being bent in the vertical direction, FIG. FIG. 7 is a side view showing a conventional work bending. 1 …… Vertical bending part 2 …… Horizontal bending part 5 …… First transport belt 6 …… Second transport belt 7 …… Guide plate 8 …… Third transport belt 13 …… Folded curved surface 17 …… Horizontal folding blade

Claims (1)

[Claims] 1. A first conveyor belt, a guide plate, and a second conveyor belt are provided in series along a workpiece conveying direction, and the first conveyor belt, the guide plate, and the second conveyor belt are provided in series.
A third conveyor belt is provided above the conveyor belt, the guide plate, and the second conveyor belt with a constant space between the respective conveyor surfaces, and the carry-out end of the first conveyor belt to the carry-in end of the second conveyor belt. The upper holding belt and the lower holding belt are provided on both sides of the guide plate, and the rotary belt is provided with folding surfaces at both ends of the first conveyor belt and close to the ends of the upper holding belt and the lower holding belt. A vertical bending portion is formed by providing a rotor with a certain gap between the folding surface of the child and the side edge of the first conveyor belt, and the vertical bending portion is formed. A horizontal folding blade that rotates around a vertical axis in the transport direction is provided to form a horizontal bending portion. Horizontal folding blade and guide And a constant gap in the vertical direction between the back surface of the horizontal folding blade and the other horizontal folding blade. A folding device, characterized in that it is close to the carry-in end of the second conveyor belt.