JPH11349199A - Envelope stacking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce damage at the time when an envelope hits a stopper without lowering processing speed of the envelope. SOLUTION: It is furnished with a depositing means having an envelope stacking part 10 to stack an envelope P which is carried in and a carrying-in roller 12 to carry in the envelope carried to a specified position to the envelope stacking part 10 and a carrier means having first and second carrier rollers 16, 20 to carry the envelope to a specified position, and carrying-in speed of the envelope by the carrying-in roller 12 is made lower than carrier speed by the carrier rollers 16, 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an envelope loading device, and more particularly, to a mechanism capable of stably transporting an enclosed envelope without causing damage to the envelope and its enclosed contents when the envelope is carried into the loading section. The present invention relates to an envelope loading device provided with the above.

[0002]

2. Description of the Related Art FIG. 3 is a side view showing a schematic configuration of a conventional envelope stacking apparatus, and FIG. 4 is a front view of a main part thereof.

In the above-described envelope stacking apparatus, an envelope P in which contents such as an invoice are sealed and sealed by an enclosing and sealing machine (not shown) is formed.
When the envelope P is conveyed to a predetermined position by a conveying unit to be described later, the envelope P is transported to the floor of the first floor (1F) portion of the envelope stacking unit 114 by a loading unit including a loading roller 110 and an idler roller 112 in contact with the loading roller. And is guided to a position where it hits a stopper 118 fixed to the front end thereof.

[0004] Although not shown, the paper guide 116 has a vertically long hole formed in at least a central portion thereof in the carrying-in direction, and when the lifter 120 is raised, its tip is formed of a rectangular flat plate. Lift section 121
Is raised through the hole, and the envelope P is lifted upward.

[0005] Above the paper guide 116, a second floor (2F) portion, which is a vertically stacked portion of the envelope P, is formed by two pairs of support plates 122 which are arranged to face each other.
As shown by a two-dot chain line in the front view of FIG. 4, each pair of support plates 122 is formed so that its outer end is supported in the horizontal direction and the inside of each pair is rotatable only above the horizontal position. ing.

Accordingly, when the lifter 120 is lifted and the envelope P is lifted by the lift portion 121 and continues to rise, the envelope P jumps up the support plate 122 as shown by a two-dot chain line in FIG. Will be lifted together with the other envelopes already supported by the support plate 122 and stacked. Then, when both ends of the envelope P rise to a position beyond the inner end of the support plate 122, the support plate 122 returns to the original position. Therefore, by lowering the lifter 120 to the original position as it is, the first floor portion is obtained. The existing envelopes can be stacked on the lowermost layer of the second floor and stacked vertically.

[0007] As shown in FIG. 5, the envelope stacking section 114 comprising the first floor portion and the second floor portion has an envelope up to the position of the loading means comprising the loading roller 110 and the idler roller 112 on the upstream side. For transporting P, a transporting unit including a pair of a first transporting roller 130 and a first idler roller 132 and a second transporting roller 134 and a second idler roller 136 are provided. Then, the first transport roller 130 and the second transport roller 134
Is rotated by a belt 139 driven by the same motor 138 wound around each pulley, together with the carry-in roller 110, and idler rollers 136 and 112 are respectively driven by springs (not shown). , Are urged downward so as to contact the second transport roller 134 and the carry-in roller 110. Also, the loading roller 11
On the downstream side of the envelope P, the loaded envelope P is returned by being supported by the upper fulcrum so as to be rotatable in the loading direction of the envelope P and urged in the return direction to return to the position indicated by the solid line. Is provided.

Therefore, as shown in FIG. 5, the conventional envelope loading device is configured such that when the envelope P is sent to a predetermined position after the encapsulation is completed by an encapsulation and sealing machine (not shown). Until then, the first idler roller 132, which was at the ascending position shown by the solid line, descends to the position shown by the two-dot chain line, and presses the envelope against the first transport roller 130, whereby the rotational force of the roller 130 is applied to the envelope P. By being transmitted, the conveyance in the direction of the stacking unit 114 is started. At this time, the first and second transport rollers 130 and 134 and the carry-in roller 11
0 is rotating at a constant speed of V1. Accordingly, the envelope P is conveyed onto the paper guide 116 of the loading section 114 at the speed of V1, and collides with the stopper 118 and stops at the first floor of the loading section 114. Although the envelope P that has collided with the stopper 118 is rebounded in the reverse direction, the envelope P is prevented from returning to the transport path by the return prevention member 140 installed at the end of the carry-in roller 110.

[0009]

However, the conventional envelope stacking apparatus has the following problems because both the transport roller and the carry-in roller rotate at a constant speed of V1.

(1) To increase the processing speed of envelopes,
It is necessary to increase the speed V1. However, when V1 is set to a high speed, the energy when the envelope P hits the stopper 118 increases, and it is easy to cause damage to the envelope and its enclosed material.

(2) In order not to damage the envelope and the enclosed matter, it is necessary to lower the speed V1.
However, when V1 is set to a low speed, the processing speed of the envelope decreases.

In the conventional envelope loading device, the above-mentioned problems (1) and (2) have been encountered between the plates. In particular, if the weight of the enclosed matter contained in the envelope is different for each envelope, the larger the weight, the greater the impact force. Therefore, both the problems (1) and (2) can be solved. Was extremely difficult.

It should be noted that the object to be conveyed is not an envelope but a sheet of paper, and a technique for switching the conveying speed to a low speed after detecting the leading edge of the sheet by a sensor is disclosed in Japanese Patent Publication No. Hei 6-603. In the technology, only the speed of the entire transfer unit is reduced. Therefore, in addition to the same problem as the above (2), there is also a problem that a new sensor must be installed or a means for switching the transfer speed must be provided. is there.

The present invention has been made in order to solve the above-mentioned conventional problems. The present invention is capable of conveying an envelope P at a high speed up to a carry-in position with respect to an envelope stacking portion, and furthermore, is capable of conveying an envelope carried to the same position. An object of the present invention is to provide an envelope loading device that can be carried into an envelope loading portion at a low speed that does not damage the enclosed material or the like.

[0015]

SUMMARY OF THE INVENTION The present invention relates to a loading means having an envelope loading section for loading an envelope loaded therein, and a loading roller for loading an envelope conveyed to a predetermined position into the envelope loading section. Transport means having one or more transport rollers for transporting the envelope to a position,
The object has been solved by making the carrying speed of the envelope by the carrying roller lower than the carrying speed of the envelope by the carrying roller.

[0016]

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

FIG. 1 is a schematic side view, corresponding to FIG. 5, showing a main part configuration of an envelope loading device according to an embodiment of the present invention.

The envelope loading device of this embodiment includes an envelope loading section 10 for loading the loaded envelope P, and a loading roller 12 for loading the envelope P transported to a predetermined loading start position into the loading section 10. Loading means having a loading idler roller 14 in contact therewith, a first transporting roller 16 for transporting the envelope P to the same position, a first transporting idler roller 18 in contact with the same, and a second transporting roller 20 And a transport unit having a second transport idler roller 22 that comes into contact therewith.

In the present embodiment, the envelope loading section 1
0 is substantially the same as the envelope loading section 114 shown in FIGS. 3 and 4, and the reference numeral 1 in FIG.
A return prevention member 24 indicated by 40 is provided.

In the present embodiment, the carrying speed of the envelope P by the carrying roller 12 is controlled by the first and second carrying rollers 1.
The transport speed of the envelope P according to 6, 20 is slower.

Specifically, the first and second transport rollers 16,
20 has the same roller diameter and each pulley 16
A and 20A have the same diameter. The two transport rollers 16, 20 are respectively connected to pulleys 16A, 20A,
First belt 2 wound around pulley 26A of motor 26
8, the motor 26 rotates at the same peripheral speed V1.

On the other hand, the carry-in roller 12 has a roller diameter of the first
(Second) Same as the transport roller 16 (20), but the outer periphery of the pulley 12A is formed about twice as large as the pulley 16A (20A), and is wound around each pulley by the same motor 26. It is rotated via the second belt 30 and rotates at a peripheral speed V2.

That is, the carry-in roller 12 rotated by the same motor 26 has a pulley 12A having an outer periphery formed by a pulley 16A.
Therefore, the carry-in speed of the envelope P by the carry-in roller 12 is set to about half of the carrying speed.

In practice, the first and second belts 28, 30
Are timing belts each having irregularities formed at the same pitch, and each pulley is formed with teeth corresponding to the irregularities. Therefore, the pulleys 12A, 16A, 20
Assuming that the number of teeth of A is Z1, Z2, Z3, in the present invention, Z1
> Z2 = Z3, which means that Z1 is about twice as large as Z2 (Z3).

In the present embodiment, the carry-in roller 12
The loading idler roller 14 is fixed to its rotating shaft, and is urged in the contact direction by a spring 32A mounted on the arm 32 rotatable at the upper end.
Further, the first and second transport rollers 16 and 20 are urged in the contact direction by transport idler rollers 18 and 22 by arms 34 and 36 having similar mechanisms and springs 34A and 36A. ing. The first transport idler roller 18 can also move up to a predetermined height and down to the position indicated by the two-dot chain line.

The grip force of the envelope P by the carry-in roller 12 and the carry-in idler roller 14 is smaller than the grip force of the first and second carry rollers 16 and 20 by the corresponding carry idler rollers 18 and 22, respectively. I have.

Specifically, the first and second transport rollers 16,
20 is made of rubber, the carry-in roller 12 is made of metal, and the coefficient of friction of the carry-in roller 12 is reduced, thereby reducing the gripping force of the carry-in roller 12 and its idler roller 14 on the envelope P. . However, the present invention is not limited to this, and the grip force may be reduced by using the same rubber roller, for example, and reducing the urging force of the spring 32A of the carry-in idler roller 14 by the spring 32A.

Next, the operation of the present embodiment will be described.

Lifter 1 described with reference to FIGS. 3 and 4
When one loading operation of the envelope P by the raising and lowering of the envelope 20 is completed, an end signal is input to a control unit (not shown), and based on the signal, the envelope P enclosed by the enclosing and enclosing machine is based on the signal.
Is transported to the right end position shown in FIG.

Thereafter, the first transport idler roller 18 is lowered by a mechanism (not shown), and the envelope P is brought into contact with the first transport roller 16. When the envelope P rotates, the envelope P is transported to the second transport roller 20 in the direction of the arrow. Then, the sheet is further conveyed to the position of the carry-in roller 12 by the conveying roller 20. Thereafter, the envelope P is loaded onto the loading section 1 by the carry-in roller 12.
0, the leading end collides with the stopper 10A, and the envelope P stops at a predetermined position of the stacking unit 10. At the time of the collision, the back-up prevention member 24 prevents the envelope P from being fed back to the transport path.

In this embodiment, as described above, the transport speed (peripheral speed) V1 of the first and second transport rollers 16 and 20 is used.
And the carry-in speed V2 by the carry-in roller 12 is V1
> V2 (V2 ≒ 0.5V1), the envelope P conveyed from the position of the first conveying roller 16 has its leading end passed between the carry-in roller 12 and the idler roller 14 and the rear end thereof. Is transported at a high speed of V1 until it passes through the second transport roller 20. However, in this case, as described above, the grip force of the carry-in roller 12 and the carry-in idler roller 14 with respect to the envelope P is the second.
The tip of the envelope P and the carry-in roller 12 are slipping due to the smaller gripping force of the transport roller 20 and the idler roller 22. Since the slip is generated, the speed can be reliably reduced without damaging the envelope P or the like.

Thereafter, the sheet is carried into the stacking section 10 at a low speed of V2 of the carry-in roller 12. At this time, since the envelope P collides with the stopper 10A at a low speed of V2, damage to the envelope P itself and its enclosed material (not shown) can be minimized. Further, the transport speed of the envelope P is reduced only by the loading operation by the loading roller 12, so that a reduction in the processing speed of the envelope can be minimized.

FIG. 2 shows that the envelope P is conveyed as described above,
The speed at which the paper is loaded and the rollers 16, 2 at the rear end of the envelope
This shows the relationship between 0 and 12 and the position. From this figure, it can be seen that the envelope P can be loaded at about half the transport speed.

Although the present invention has been specifically described above, the present invention is not limited to the above-described embodiment, and can be variously modified without departing from the gist thereof.

For example, in the above embodiment, the carry-in roller 1
In order to reduce the gripping force of the envelope P by the roller 2 and the idler roller 14, the case where the carry-in roller 12 is made of metal and the carry roller 20 is made of rubber is shown, but the present invention is not limited to this. May be formed. In particular, by selecting the material of the carry-in roller 12 in consideration of the material of the envelope, the deceleration characteristics of the envelope can be optimized.

In the above embodiment, only the carry-in roller 12 is made of metal. However, for example, the carry-in idler roller 14 may be made of metal.
And the loading idler roller 14 may be formed of separate low friction materials.

In the above embodiment, the carry-in roller 12 is formed of metal in order to reduce the gripping force between the carry-in roller 12 and the carry-in idler roller 14, but the carry-in roller 12 is formed of the first and second rollers. 2 transport rollers 16, 20
May be formed of rubber having the same friction coefficient as that described above, and the urging force of the carry-in idler roller 14 to the carry-in roller 12 by the spring 32A may be reduced. In this case, there is an advantage that there is no limitation on the selection of the material of the carry-in roller 14. If a material of the same quality as the other transport rollers is applied to the carry-in roller 12, it is possible to save time and effort in selecting the material. If an inexpensive material is used, the cost can be reduced. Further, for example, if the biasing force of the spring 32A can be adjusted, the carry-in roller 12 and the carry-in idler roller 1 can be adjusted.
4 can easily set the grip force.

The number of transport rollers is not limited to two as in the embodiment, but may be one or three or more.

[0039]

As described above, according to the present invention,
Since only the loading speed by the loading means can be reduced,
Damage when the envelope hits the stopper of the stacking portion can be reduced without lowering the processing speed of the envelope. In addition, when the gripping force of the loading means is made smaller than the gripping force of the transporting means, there is no need to install a new sensor or provide a means for switching the transporting speed, thereby simplifying the structure and reducing costs. can do.

[Brief description of the drawings]

FIG. 1 is a side view showing a main configuration of an envelope loading device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a relationship between a transport speed and a loading speed.

FIG. 3 is a side view showing a main part of the envelope loading unit.

FIG. 4 is a front view showing a main part of the envelope loading section.

FIG. 5 is a side view showing a main part configuration of a conventional envelope loading device.

[Explanation of symbols]

 P: Envelope 10: Envelope loading section 10A: Stopper 12: Loading roller 14: Loading idler roller 16 ... First transport roller 18: First transport idler roller 20 ... Second transport roller 22 ... Second transport idler roller 24 ... Return preventing member 26 ... Motor 28 ... First belt 30 ... Second belt

Claims (4)

[Claims] An envelope loading section for loading the loaded envelope;
An envelope loading device comprising: loading means having a loading roller for loading an envelope transported to a predetermined position into the envelope loading portion; and transport means having one or more transport rollers for transporting the envelope to the same position. An envelope loading device, wherein a speed at which the carry-in roller takes in the envelope is slower than a speed at which the carry roller carries the envelope. 2. The loading roller according to claim 1, wherein said loading roller is provided with a loading idler roller, and said transporting roller is provided with a transporting idler roller capable of being urged in a contacting direction. An envelope loading device, wherein the gripping force of the envelope by the transfer idler roller is smaller than the gripping force of the envelope by the transfer roller and the transfer idler roller. 3. The envelope loading device according to claim 2, wherein at least the carry-in roller of the carry-in roller and the carry-in idler roller is formed of a material having a smaller coefficient of friction than the carry roller. 4. The envelope loading device according to claim 2, wherein the biasing force of the carry-in idler roller is smaller than that of the transport idler roller.