JPH0414238Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention uses a relay roller, which is rotated by a motor that can rotate forward and reverse, to hold the envelope inserted between the conveyance roller and the presser roller. The flap is guided and placed on a mounting table, its flap is bent with a bender, and glue is applied with an applicator.Then, by reversing the motor, it is returned by a relay roller and transferred to a conveying roller and a holding roller. Sandwich it again with
This invention relates to an envelope sealing machine that seals and discharges envelopes.

``Prior art and its problems'' Conventionally, this type of envelope sealing machine was
The one described in Publication No. 172629 has been proposed. This is because the motor that rotates the relay roller is reversed by the reversing switch after the bending of the flap by the bender and the gluing by the application member are completed, so a time loss occurs before the motor reaches its rated rotation speed. The process of returning and sealing the envelopes takes a long time, which has been an obstacle to increasing the speed and efficiency of the processing cycle per envelope.

Therefore, it is considered that the motor is operated in the reverse direction before the bending of the flap by the bender and the application of glue by the applicator are completed, but if this is all that is done, the envelope will not be returned while the flap is being folded or glued. This may cause problems such as damage to the envelope or failure to return the envelope midway through.

In this invention, the motor that rotates the relay roller is
This is intended to prevent the above-mentioned problem from occurring even if the reverse operation is performed before the bending of the flap by the bender and the gluing by the applicator are completed.

``Means for Solving the Problems'' Therefore, in the envelope sealing machine of the present invention, a slit is provided in the mounting table that allows a part of the relay roller to protrude above the mounting table, and a slit is provided on the lower side of the mounting table. An envelope retraction electromagnet is installed which is temporarily activated when the motor reverses rotation, and an envelope retraction member is pivotally mounted on a shaft so as to be movable up and down. These plungers and the envelope retracting member are connected to move the envelope retracting member up and down by the expansion and contraction of the plunger of the envelope retracting electromagnet, and when the envelope retracting member is rotated upward, a A protrusion is provided that protrudes above the mounting table and pushes up the envelope on the mounting table above the relay roller.

``Operation'' When the motor reverses, the relay roller also reverses, but
At this time, the envelope retracting electromagnet causes the envelope retracting member to temporarily push up the envelope on the mounting table to a retracted position where it does not come into contact with the relay roller, so that return of the envelope is temporarily suspended.

"Embodiment" An embodiment of the present invention will be described below in detail based on the drawings.

As shown in FIGS. 1 and 2, this envelope sealing machine has a single unit structure in which all the components are installed in a housing 1, and can be used on a desk as well as being portable. A supply guide stand 2 is attached to the front outside of the housing 1, and an envelope 3 (e.g. long size 3, long size 4, square size 8, etc.) is passed on this feed guide stand 2 with its bottom end first. It is inserted from the insertion opening 4 along the left inner surface of the housing 1 while being guided. An insertion guide plate 5 with an upwardly inclined upper surface is provided below the insertion slot 4. The envelope 3 is guided slightly diagonally upward by the insertion guide plate 5, and the envelope 3 is guided upward by the insertion guide plate 5. It is inserted between the upper pressing roller 7. The conveyance roller 6 is supported by the housing 1 via a rotating shaft 8, and the press roller 7 is supported by a rotating shaft 10 by a lid frame 9 that opens and closes approximately the front half of the upper surface of the housing 1. has been done. The conveyance roller 6 rotates at a fixed position in the housing 1, but the rotation shaft 10 of the press roller 7 slides up and down along the guide groove 11 of the lid frame 9, and is urged downward by a spring 12. Bearings 1 on both sides
3, it is pressed against the conveyance roller 6 so that it can move up and down.

The rear end of the lid frame 9 is rotatably pivoted in the vertical direction by a shaft 14, and when the lid frame 9 is opened upward, the press roller 7 is separated from the conveyance roller 6, and the upper half of the housing 1 It opens when a problem occurs such as the envelope 3 getting stuck in the housing 1, or when performing an inspection.
Open the lid frame 9 in this way. This lid frame 9 has a shaft 1
5, a hook 16 is rotatably supported. The hook 16 is biased clockwise in FIG. 1 by a spring 17 and engages with a stopper 18 provided on the housing 1, thereby locking the lid frame 9 in the closed state. In order to release this locked state, a lock release button 19 is attached to the lid frame 9, and when this is pushed down, the slope 20 is released from the hook 1.
6, the hook 16 is rotated counterclockwise as shown by the chain line in the figure, and the hook 16 is disengaged from the stopper 18.

A pulley 22 is fixed to the rotating shaft 8 of the conveyance roller 6, and a belt 25 is stretched between the pulley 22 and a pulley 24 of a forward and reverse reversible conveyance motor 23 installed in the housing 1. , the conveying roller 6 is rotated forward or reverse by this motor 23. Further, the rotation shaft 8 of the conveyance roller 6 and the rotation shaft 10 of the press roller 7 are provided with gears 26 and 2, respectively.
7 is fixed, these gears 26 and 27 mesh with each other when the lid frame 9 is closed, and when the conveying roller 6 rotates, the pressing roller 7 rotates as a result.

Therefore, the envelope 3 inserted between the conveying roller 6 and the pressing roller 7 as described above is fed into the housing 1 as these rollers rotate normally. At this time, since both rollers 6 and 7 are driven and rotated at the same time, there is no slippage between them, and no jams or the like occur on the envelope 3.

The envelope 3 thus sent is placed on a mounting table 28 which is stretched substantially horizontally within the housing 1. Two left and right slits 29 are opened at a predetermined interval in the middle of this mounting table 28, and left and right relay rollers 30 are placed in the left and right slits 29.
is mounted on the housing 1 by a shaft 31, and two left and right auxiliary rollers 32 are mounted above the shaft 31 at the same distance. The left and right relay rollers 30 have a belt 35 stretched between a pulley 33 fixed to a common shaft 31 and a pulley 34 fixed to the rotating shaft 8 of the conveyance roller 6, so that the conveyance roller 6 and press roller 7, it rotates forward or reverse at the same time. The left and right auxiliary rollers 32 are rotatably supported by an axle 36 on a vehicle frame 37 . As shown in FIGS. 1 and 3, the vehicle frame 37 is supported by a shaft 39 at the center of the front side of a mounting frame 38 so as to be tiltable left and right.
8. It is supported by a shaft 42 so as to be movable up and down on a bracket 41 projecting from the lower surface of an upper plate 40 above the mounting table 28. A torsion spring 43 is hung on the vehicle frame 37, and the vehicle frame 37 is normally maintained in a horizontal state by the torsion spring 43. The mounting frame 38 is connected to a plunger 45 of an envelope ejection electromagnet 44 installed on the top plate 40, and when this electromagnet 44 is energized, the mounting frame 38 is rotated downward, and normally the left and right Spring 4 on relay roller 30
The left and right auxiliary rollers 3 are lightly touching due to the action of step 6.
2 is strongly pressed against the left and right relay rollers 30.

In order to prevent the envelope 3 sent onto the mounting table 28 from floating up, the front end of the lid frame 9 supports the base end of an envelope pressing rod 47, such as a resilient U-shaped wire. Envelope 3 is attached to this envelope pressing rod 4.
The free end portion 48 bent into a V-shape of 7
8, is guided by the mounting table 28, is sent between the relay roller 30 and the auxiliary roller 32, and is continuously conveyed in the same direction by the forward rotation of the relay roller 30. At this time, the envelope 3 is pressed from above against the left and right relay rollers 30 by the left and right auxiliary rollers 32;
can be tilted from side to side, so even if the thickness of the envelope 3 is different on the left and right sides as shown in FIG. Therefore, the envelope 3 is sent while receiving the same propulsive force from the left and right relay rollers 30. In this way, the relay roller 30 and the auxiliary roller 3
The envelope 3 sent between the two is simultaneously inserted between the upper surface of the rear side of the mounting table 28 and a thin holding plate 49 placed thereon so as to be vertically movable.
9, while being lightly pressed from above, collides with the movable stop plate 50 and stops. The front end 49a of the presser plate 49 is inclined upward to facilitate insertion of the envelope 3.

This movable stop plate 50 consists of a horizontal part 50a and a vertical part 50b, and moves back and forth integrally with a sliding body 52 that slides along a slit 51 below the upper plate 40. A cam follower 53 is projectingly provided on the upper surface of the horizontal portion 50a of the movable stop plate 50, and the cam follower 53 is fitted into a cam groove 56 on the lower surface of the cam plate 55 that slides left and right along the guide plate 54 on the upper side thereof. There is.

Therefore, when the knob 57 protruding from the cam plate 55 is picked and the cam plate 55 is slid to the left or right,
The movable stop plate 50 moves forward or backward together with the sliding body 52, and the stop position of the envelope 3 can be adjusted according to its size. In addition, the cam plate 55
The brake spring 59 is engaged with a rack 58 provided on the front edge of the brake spring 59, thereby preventing the brake spring from moving inadvertently.

Further, on the sliding body 52, an inverted L-shaped envelope end detection lever 60 is rotatably mounted and a spring 61
It is pivoted and biased counterclockwise in the figure. When the envelope 3 collides with this envelope end detection lever 60 and the envelope end detection lever 60 is rotated clockwise,
The envelope end detection sensor 61 attached to the sliding body 52 is activated, and it is detected that the envelope 3 has reached the end (vertical portion 50b of the movable stop plate 50). Upon this detection, the bender actuating motor 62 installed in the housing 1 is immediately driven, and a short time later, the transport motor 23 is stopped, so that the envelope 3 is moved to the vertical portion 50b of the movable stop plate 50. Even after the collision, it receives a feeding action for a predetermined period of time and is held at that position.

Above the bender operating motor 62, three cams, a bender cam 63, a coating cam 64, and a flap guide cam 65, are fixed to a common shaft 66 so as to rotate together. Since the belt 69 is stretched between the pulley 67 and the pulley 68 of the bender actuating motor 62, the bender actuating motor 6
They are simultaneously rotated by two drives. These cams include a bender lever 70, as shown in FIG.
Pins provided at the free ends of the coating lever 71 and the flap guide lever 72 are engaged with each other, and these levers are rotated up and down according to the cam curve as the corresponding cam rotates. .

A horizontally long flap guide 74 is fixed to a flap guide shaft 73 to which a flap guide lever 72 is fixed at one end. As shown in FIG. 6, this flap guide 74 is composed of a horizontally long plate bent in a F-shape, and includes an upwardly inclined envelope bottom end guide portion 74a and a downwardly inclined flap guide portion 74b.
and is formed. And flap guide 74
is the bending portion 7 in the normal state when the bender actuating motor 62 is not driven, that is, in the home position.
4c is located slightly above the mounting table 28, as shown in FIG. 1 (dashed line in FIG. 6). Therefore, the envelope 3 carried in by the transport roller 6 is slightly lifted by the envelope bottom guide portion 74a of the flap guide 74, so even if it is thin and bends, it can be accurately guided onto the mounting table 28. be done. When the bender operating motor (stepping motor) 62 is driven and the flap guide lever 72 is rotated counterclockwise in FIG. 5, the flap guide 74 rotates downward as shown by the solid line in FIG. be done.

On the other hand, as shown in the figure, a horizontally elongated coating member 76 made of a metal plate with good thermal conductivity is fixed to a coating shaft 75 to which the coating lever 71 is fixed at one end. This application member 76
The free end portion of the coating portion 76a is bent into a V-shape, and the coating portion 76a has a number of notches 76b.
is drilled. An electric heater 77 covered with a cover is attached to the lower surface of the proximal end of the application member 76, and the application member 76 is heated by the heater 77.

A glue container 78 is installed below the application member 76. This glue container 78 contains a hot melt glue 79, and the application member 76 is
When rotated downward, at least the application member 76
A is dipped into this glue 79. An electric heater 80 for heating the glue is attached to the outer bottom surface of the glue container 78 below the portion where the application member 76 is immersed. This heater 80 does not have the size and heat generation amount to heat the entire bottom surface of the glue container 78 and melt all the glue therein, but only partially heats the glue 79 in the area where the application member 76 is immersed. The size and calorific value are such that it can be melted. The coating member 76 to which the glue 79 is attached by this dipping is
It rotates upwards to apply glue 79 to the flap 3a of the envelope 3 (which is stopped as described above) as will be described later. Note that the glue 79 is supplied through a supply port 78 provided in the top cover 78a (FIG. 2) of one end of the glue container 78.
Replenish from b.

Further, a bender 82 is attached to a bender shaft 81 to which the bender lever 70 is fixed at one end. As shown in FIG. 5, this bender 82 has a horizontally long plate 83 on the inside of an L-shaped horizontally long plate 83 with a hanging plate 83b bent and hanging from the tip of an upper plate 83a, that is, on the inside surface of the hanging plate 83b. The splint plate 84 is attached to the lower edge of these hanging plate portions 83b.
A substantially V-shaped fitting groove 82a that widens downward is formed between the lower edge of the frame and a slit 82b that allows the envelope pressing rod 47 to be inserted into the fitting groove 82a.
is installed. In addition, the oblong plate 83 and the splicing plate 84
It may be provided integrally with.

A horizontally long plate-shaped envelope pressing member 85 is also rotatably mounted on the bender shaft 81. The free end of the envelope pressing member 85 is bent into a gentle V-shape to form a pressing portion 85a. The envelope pressing member 85 has a spring 8 stretched between the bearing portions 85b at both left and right ends and the splint plate 84 of the bender 82.
6 in the clockwise direction in FIG. Due to this bias, the envelope pressing member 85 pushes its protrusion 8
5c comes into contact with the lower surface of the oblong plate 83 of the bender 82, so that when the bender 82 rotates downward, it also rotates downward.

Normally, when the bender actuating motor 62 is not driven, the bender 82 is held at the upper home position as shown in FIG. 1, but when the bender actuating motor 62 is driven, the bender lever 70
When it is rotated clockwise in FIG. 5, it rotates downward toward the front edge of the placement table 28 while being accompanied by the envelope pressing member 85.

On the front edge of the mounting table 28, there is a flap bent protrusion 2 that projects diagonally upward at an obtuse angle with respect to its upper surface.
8a is provided. This flap bending protrusion 2
8a has a size that allows it to be removably fitted into the fitting groove 82a of the bender 82;
When the flaps 2a are fitted together, the flap 3a of the envelope 3, which has been stopped as described above, is bent as will be described later.

The flap guide 74, the coating member 76, and the bender 82 operate when the disc 86 integral with the bender cam 63, coating cam 64, and flap guide cam 65 rotates once, and the slit 86a is detected by the photoelectric sensor 53. When the bender actuating motor 62 stops, it returns to the home position.

The amount of rotation of this bender actuating motor 62, which is a stepping motor, is electrically counted (for example, by counting pulses), and the counted value is the set value (for example, 270 degrees as the rotation angle of the 7 bender levers). Then, the conveyance motor 23 returns to the home position and the bender operation motor 6
2 is reversed before it stops. This reversal causes the relay roller 30 to reverse, but in order to suspend the return of the envelope 3 until the three parties return to their home positions, the left and right slits 2 of the mounting table 28 are
At 9, an envelope retraction member 87 for separating the envelope 3 from the left and right relay rollers 30 is provided.

As shown in FIGS. 3 and 7, the envelope evacuation member 87 is pivotally connected to a shaft 88 located below the mounting table 28 so as to be vertically movable, and has an opening through which the upper portions of the left and right relay rollers 30 are inserted. Left and right arm portions 87a
Arc-shaped protrusions 87b that can protrude upward from the left and right slits 29 of the mounting table 28 are formed on these arm portions 87a. The envelope retracting member 87 includes an envelope retracting electromagnet 89 and a plunger 90 installed below the mounting table 28.
When the electromagnet 89 is energized, it is rotated upward from the chain line position to the solid line position in FIG.
The left and right protrusions 87 lift the envelope 3 on the mounting table 28 and separate it from the left and right relay rollers 30.

The supply guide stand 2 can be detachably attached to the front surface of the housing 1. A ruler plate 91 that is adjusted according to the width of the envelope 3 is attached to the supply guide table 2 so as to be slidable left and right.
A horizontally long regulating plate 92 that prevents the envelope 3 from lifting up.
is installed at an angle.

Next, the overall operation of the present envelope sealing machine will be explained with reference to the timing chart of FIG.

When the envelope 3 is inserted into the insertion slot 4 through the supply guide table 2 and this is detected by a sensor (not shown), the transport motor 23 rotates forward and the transport roller 6, press roller 7, and relay roller 30 are rotated. The envelope 3 rotates in the normal direction, and after being fed between the relay roller 30 and the auxiliary roller 32 by the conveying roller 6 and the pressing roller 7, the envelope 3 is further moved in the same direction by the relay roller 30 while being pressed by the auxiliary roller 32. Sent. The envelope end detection lever 60 is actuated by the envelope 3;
When this is detected by the end detection sensor 61, the bender actuating motor 62 is driven as described above, and then the forward rotation of the transport motor 23 is stopped.
The envelope 3 is stopped while being placed on the mounting table 28 at the position where it collides with the movable stop plate 50.

At this time, the envelope 3 is moved between the two relay rollers 3 on the left and right.
2, it is pressed against the two left and right relay rollers 30, and as the left and right relay rollers 30 rotate forward, the movable stop plate 50 receives propulsion force on both sides and collides with the movable stop plate 50, as shown by the solid line in FIG. Even if it is inserted obliquely to the right or diagonally to the left as shown by the one-dot chain line, it will be straightened as shown by the two-dot chain line.

However, as shown in FIG.
If the envelope 3 is a single piece and is placed offset to the right of the vertical center line of the envelope 3, as shown by the solid line in the figure, if the envelope 3 is inserted diagonally to the right, it is shown by the chain line in the figure. However, on the other hand, if it is inserted obliquely to the left, it cannot be corrected. In addition, if the auxiliary roller 32 is one piece and is disposed offset to the left of the vertical center line of the envelope 3 as shown in FIG. 11, the envelope 3 will tilt diagonally to the left as shown by the solid line in the figure. If it is inserted diagonally to the right, it can be corrected as shown by the chain line in the figure, but if it is inserted diagonally to the right, it cannot be corrected. Furthermore, if one auxiliary roller 32 is arranged on the vertical center line of the envelope 3,
Even if the envelope 3 is inserted with an inclination in either the left or right direction, it cannot be corrected.

The envelope 3 that has collided with the movable stop plate 50 and stopped in the above manner is adjusted in position by the movable stop plate 50 so that the base end of the flap 3a is brought into contact with the flap fold of the mounting table 28, as shown in FIG. It corresponds exactly to the upper edge of the curved protrusion 28a.

In this state, the bender 82 rotates downward as the bender actuating motor 62 is driven, and the fitting groove 82a aligns with the flap bending protrusion 2 as shown in the figure.
8a, the flap 3a of the envelope 3 is sandwiched between the fitting groove 82a and the flap bending protrusion 28a and bent downward. Further, at the same time, the envelope pressing member 85 also rotates downward, and its pressing portion 85a presses the tip of the main body of the envelope 3 onto the mounting table 28. Therefore, even if the envelope 3 is thick, the base end of the flap 3a does not separate from the flap bending protrusion 28a, and is bent at the base end.

When the flap 3a is bent in this manner, the flap guide 74 rotates downward to a retracted position where it does not come into contact with the flap guide 74, as shown by the solid line in the figure. on the other hand,
The application member 76 is rotated once downward to immerse its application portion 76a in the glue 79, then rotated upward to remove it from the glue 79, and further rotated upward with the glue still attached. The applicator 76a is brought into sliding contact with the back surface of the flap 3a which has already been bent or is being bent as described above, and the glue is applied thereto. At this time, the application member 76 is not only heated by the heater 77, but also has its application part 76a bent in a V-shape and has a large number of notches 76b, so that the adhesive does not run out. It works very well, and the glue that adheres to it hardens and hardens, causing unevenness in the amount of adhesive applied, or applying too much more than necessary, or applying it to areas other than the flap of the envelope 3. Apply just the right amount evenly. Apply beautifully.

While the bender actuating motor 62 is in operation, the conveying motor 23 starts to rotate in reverse as described above, and at the same time, the envelope retracting electromagnet 89 is energized. Due to this bias, the envelope retraction member 87 is rotated upward as shown in FIG. Since the envelope 3 is lifted together with the auxiliary roller 32 and separated from the relay roller 30, the envelope 3 is not returned even if the relay roller 30 reverses, and is kept stopped on the mounting table 28. In other words, the envelope 3 is evacuated by the relay roller 30 so as not to be returned until the reverse rotation speed of the transport motor 23 reaches the rated value.

After the transport motor 23 reaches the rated rotation speed, the flap guide 74, application member 76 and bender 82
Sensor 87 indicates that the has returned to the home position.
When detected by , the envelope evacuation electromagnet 89 is demagnetized, while the envelope ejection electromagnet 44 is energized. When the envelope evacuation electromagnet 89 is deenergized, the envelope evacuation member 87 returns downward and rotates to release the lifting of the envelope 3. On the other hand, due to the energization of the envelope ejection electromagnet 44, the left and right auxiliary rollers 32 move to remove the envelope. 3, the relay roller 30 is already reversed as described above.
Because the envelope 3 is pressed strongly against the mounting table 28
The top will be returned.

At this time, the flap guide 74 has already returned to the home position shown by the chain line in FIG. Since the flap 3a is inclined downward to a position lower than the protrusion 28a, when the envelope 3 is returned, the flap 3a is lifted along the inclined flap guide part 74b of the flap guide 74, and the flap 3a formed at the proximal end as described above is lifted up along the inclined flap guide part 74b of the flap guide 74. It is folded at the fold line and stacked on the back side of the main body of the envelope 3. Therefore, the flap 3a is lightly attached to the back surface of the main body of the envelope 3 by the glue applied to the back surface. Further, at this time, the open end of the main body of the envelope 3 is also lifted by the flap guide portion 74b of the flap guide 74, so that the envelope 3 is prevented from falling into the glue container 78 or toward the plate of the conveyance roller 6.

Thereafter, the envelope is immediately sent between the conveying roller 6 and the pressing roller 7, and is pinched by these to firmly adhere the flap 3a to the back surface of the envelope 3 and seal it. It is ejected from the insertion port 4 to the outside of the housing 1 by both rollers.

"Effects of the invention" As described above, according to the invention, the motor for rotating the relay roller can be operated in reverse before the bending of the flap by the bender and the gluing by the application member are completed. The overall time loss due to the delay in the rise of the rotation speed is eliminated, and the processing cycle per envelope can be made faster and more efficient.

Furthermore, as the motor reverses, the relay roller also reverses, but at that time, the envelope retraction member temporarily pushes the envelope on the mounting table to a retracted position where it does not come into contact with the relay roller, temporarily preventing the return of the envelope. Therefore, problems such as damage to the envelope due to return of the envelope during folding and gluing of the flap, or failure to return the envelope during the process do not occur.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially cutaway side view, Fig. 2 is a plan view of the same, Fig. 3 is an enlarged sectional view taken along the line of Fig. 1, and Fig. 4 shows an intermediate roller and an intermediate roller. FIG. 5 is an enlarged side view showing the relationship between the bender cam, coating cam, flap guide cam and the levers rotated by these cams; FIG. FIG. 7 is an enlarged side view of a portion that temporarily suspends envelope return; FIG. 8 is a timing chart; FIGS. 9 to 11. These are explanatory diagrams illustrating how the auxiliary rollers correct the envelope when it is inserted at an angle, with the number and position of the auxiliary rollers being different. 3... Envelope, 3a... Flap, 6... Conveying roller, 7... Holding roller, 23... Conveying motor, 28... Placing table, 29... Slit, 30...
... Relay roller, 76 ... Application member, 82 ... Bender, 87, 87b ... Envelope retraction member and its protrusion,
88...shaft, 89...envelope avoidance electromagnet, 90...
...Plunger.

Claims (1)

[Scope of utility model registration request] A motor 2 that can rotate the envelope inserted between the conveyance roller 6 and the press roller 7 in forward and reverse directions
3, the envelope is guided by a relay roller 30 rotated by a relay roller 30 onto a mounting table 28, the flap of the envelope is bent by a bender 82, and glued by a coating member 76, and then the motor 23 is reversed. In the envelope sealing machine that returns the envelope by the relay roller 30, pinches it again between the conveyance roller 6 and the press roller 7, seals it, and discharges the envelope, the relay roller 3
A slit 29 is provided on the mounting table 28 to allow a part of the 0 to protrude above the mounting table 28.
An envelope retraction electromagnet 89 that is temporarily activated when the motor 23 operates in reverse is installed on the lower side, and an envelope retraction member 87 is pivotally mounted on a shaft 88 so as to be movable up and down. These plungers 90 and the envelope retraction member 87 are connected to move the envelope retraction member 87 up and down by the expansion and contraction of the plunger 90 of 89, and the envelope retraction member 87 has the slit when it is rotated upward. 29 protrudes above the mounting table 28 and the mounting table 28
An envelope sealing machine characterized by being provided with a protrusion 87b that pushes the upper envelope upwards from the relay roller 30.