JPH08258816A - Device for feeding envelop while opening flap - Google Patents

Abstract

PURPOSE: To prevent a double envelop feed to reliably open a flap of an envelop in a device for continuously feeding the envelop to a printer or the like. CONSTITUTION: When an envelop 3" with a flap 3"a opened by a blade 7 reaches a position of a sensor 15, the drive of a pick roller 9 is stopped, and the envelop 3" is fed to a printer by a feed roller 14. With the envelop 3" on the drive stop position, the pick roller 9 is positioned within an area of the flap 3"a. The pick roller 9 is operated in conjunction with a movable paper guide 6 so as to be always disposed on the center of the width W of the envelop. When the envelop 3" is fed to the printer, the pick roller 9 is also rotated as a follower, but a succeeding envelop 3 is not fed. When the drive of the pick roller 9 is again started, the same operation is continuously repeated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for continuously feeding envelopes to a printer or the like.

[0002]

2. Description of the Related Art In order to perform printing on the surface of an envelope, a method of manually feeding envelopes with flaps folded one by one is often used. In order to feed continuously, it is necessary to solve problems such as double feeding due to non-uniform thickness due to superposition and feeding failure due to flap end face. As one of the means for solving the problem, a method is known in which a flap is automatically opened and the paper is fed to a printer, and the outline thereof is shown in FIGS. 1 and 2.

The envelope 3 is loaded on the base 2 connected to the printer 1 with the flap 3a facing downward, the leading end is abutted against the partition 4, and the load is applied by the weight 5 on the upper surface. Both sides of the envelope are regulated by a fixed paper guide 27 and a moving paper guide 6. When the feeding motor 16 is driven, the drive shaft 17 and the timing belt 1 which are directly connected to each other.
Puller shaft 19 and separation roller shaft 21 via 8 and 20
Is rotated, and the pick roller 9, the puller roller 12, and the sorting roller 10 are driven by the one-way clutches 9a, 12a, and 10a.
Are simultaneously driven in the same direction indicated by the arrow. 13 is an idler roller. Feed roller 1 on the printer 1 side
The motor 4 is constantly rotated by the motor 22.

The lowermost envelope 3 is conveyed by the frictional force between the pick roller 9 and the envelope 3 and separated into one sheet between the separating pad 11 and the separating roller 10 and sent to the puller 12. The flap 3a is pushed open by the blade portion of the blade 7 and horizontally opened like 3 "a, and is fed in the state shown in Fig. 2. When the tip 3" of the envelope reaches the sensor 15, the feeding motor 16 is driven. Then, the sheet is stopped and is fed into the printer 1 by the feed roller 14. When the drive of the motor is stopped, the friction between the envelope 3 "and each roller to be sent causes
The one-way clutches 9a, 10a, and 12a run idle, and each roller is driven to rotate.

When the envelope 3 "is fed into the printer, the feeding motor 16 is driven again, the next envelope 3'repeats the same operation, and the envelopes are fed continuously.

[0006]

The problem of the conventional apparatus is that while the lowermost envelope is being conveyed, depending on the size of the envelope and the shape of the flap, the next envelope may be sent out together. To do. The flaps of the envelopes taken out are not opened, and the flaps are sent to the printer with the flaps folded, causing trouble. In order to prevent the take-out from occurring, it is necessary to limit the shape of the envelope, and there is a problem that the types of usable envelopes decrease. The outline of the relationship between the cause of the removal and the envelope shape will be described with reference to FIGS. 1 and 2. 2 shows the position of the envelope 3 "when the driving of the feeding motor 16 is stopped. Here, when the roller exposed portion 9b of the pick roller appears, the second exposed sheet 9b is driven by the exposed portion 9b. The envelope 3'is in a state of being taken out and sent by the distance indicated by E. When the taken-out amount E is large, the flap 3'a is taken out by overlapping the 3'a and the flap 3 '. The drive of the pick roller 9 is stopped at the position where the tip of a exceeds the blade edge 7a. When the conveyance is switched to the feed roller, the conveying force is not applied to the envelope 3 ′ that has been taken out and the state is maintained, and the envelope 3 ′ is conveyed by the driving of the pick roller 9 again, but the flap 3′a is not opened and the printer is opened. Will be sent to.

From the above-mentioned operation, it is necessary not to generate the roller exposed portion 9b in order to prevent the takeout. For that purpose, it is necessary to solve the problems such as bringing the driving stop position of the pick roller 9 closer to the blade 7 side, designating the length L of the envelope to be used, devising the arrangement of the pick roller 7, and the like. . Also, when allowing some take-out, the conditions (C
-B)> E must be satisfied. That is, the distance B from the tip of the envelope to the blade edge should be as short as possible, and the dimension C from the tip of the envelope to the tip of the flap 3a may be small.

In particular, in the Western envelope shown in the figure, C is mainly 50 mm to 70 mm, and the dimension B has a value close to C due to its structure, so that the allowable amount E of removal is a small value.

An object of the present invention is to alleviate the limiting condition of the envelope shape and prevent the flap opening mistake.

[0010]

The first means of the present invention is to:
This is achieved by stopping the driving of the pick rollers when the pick roller is exposed. However, since the stop position of the leading end of the envelope is the position reaching the feed roller, it is necessary to bring the feed roller closer to the blade side. Further, when the stop position of the front end of the envelope is placed on the blade side of the puller roller, it is necessary to separate the drive system of the puller roller and the other rollers and continue the conveyance by the puller roller.

According to the second means of the present invention, the pick roller is placed at the center of the flap of the envelope to prevent the rollers from being exposed at both ends, whereby the condition for limiting the length of the envelope can be relaxed.

The method of placing the pick roller at the center of the envelope is as follows.
This is achieved by moving a pick roller connected by a timing belt or the like so as to always stay at the center between the paper guides in conjunction with the paper guides that move corresponding to the envelope width.

[0013]

At the position where the pick roller starts to be exposed, the envelope switched to the feed roller conveyance is sent to the printer while idling the pick roller, the separation roller and the puller roller. The next envelope does not take out because the conveying force due to the idle rotation of the roller is very small.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described based on the implementation side shown in FIGS. The movement amount of the pick roller 9 is 1/2 of the movement amount S of the movable paper guide 6 which is movable corresponding to the envelope width W, and the pick roller 9 is always arranged at the center of the envelope. An appropriate length of the pick roller 9 is determined by the shape of the flap 3 "a of the envelope and the conveying force.
Is in the area of the flap 3 "a, the length L of the envelope may be small. In this state, the drive of the pick roller 9 is stopped. The envelope 3 is not taken out. The larger the gradient of a, the smaller the length L of the envelope may be, but the size C shown in FIG. 2 also becomes smaller. Therefore, it is necessary to specify the envelope shape according to the configuration of the device. FIG. 4 shows a method of moving the pick roller 9.

Stepped pulley 2 having a pitch circle diameter D of 2: 1
The movable paper guide 6 is fixed to the timing belt 26 hung between four, and the blade holder 8 is fixed to the timing belt 25.
The moving amount of the pick roller is 1/2 of the moving amount of the paper guide.

[0016]

According to the present invention, since the envelope is shaped so that the dimensional restriction condition is relaxed, and the carrying force is switched at a position where the pick roller is not exposed, the carrying out does not occur and the carrying force is surely secured. The flap can be opened.

[Brief description of drawings]

FIG. 1 is a side sectional view of a conventional device.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a plan view showing an embodiment of the flap opening and feeding device of the envelope according to the present invention.

FIG. 4 is a partial configuration diagram of FIG. 3.

[Explanation of symbols]

3 "a is a flap, 6 is a moving paper guide, 8 is a blade holder, 9 is a pick roller, 24 is a stepped pulley, and 25 is a stepped pulley.
Is a timing belt, and 26 is a timing belt.

Claims (3)

[Claims] 1. The lowermost envelope loaded with the folded flap on the lower side is conveyed by the frictional force between the pick roller and the envelope, the flap is opened by a blade provided in front of the flap, and separated one by one by a separating roller. When the sealed envelope reaches a certain position, the driving force of the pick roller is stopped and the feed roller continues the conveyance, and the pick roller etc. is driven to rotate by contact with the envelope and idling of the one-way clutch. In the flap opening and feeding device described above, the flap of the lowermost envelope is fed, the drive of the pick roller is stopped at the position where the surface of the pick roller starts to be exposed under the flap, and the pick roller is switched to the driven rotation. A flap opening and feeding device for envelopes. 2. The lowermost envelope stacked with the folded flap on the lower side is conveyed by the frictional force between the pick roller and the envelope, the flap is opened by a blade provided in front of the flap, and separated one by one by a separating roller. When the sealed envelope reaches a certain position, the driving force of the pick roller is stopped and the feed roller continues the conveyance, and the pick roller etc. is driven to rotate by contact with the envelope and idling of the one-way clutch. In the flap opening and feeding device, the paper guide that can move according to the envelope width
The pick roller is movably attached to the drive shaft so that it is always located in the center of the envelope width, and the flap of the bottom envelope is sent, and the pick roller drive is stopped at the position where the pick roller surface starts to be exposed under the flap. Then, the flap opening and feeding device of the envelope, wherein the pick roller is switched to the driven rotation. 3. A pulley 2 having a peripheral speed of 2: 1 as means for interlocking a pick roller in conjunction with the paper guide.
A movable paper guide and a blade holder mounted so as to be movable on the drive shaft together with the pick roller are fixed on two belts between the stepped pulleys, each of which is composed of one piece. The flap opening and feeding device for an envelope according to claim 2, wherein the movement amount is / 2.