JP2001205988A - Sealing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sealing device capable of completing a sealing treatment by an adhesive layer from a bend formation of a flap in a short time and effectively preventing occurrence of a flap release or the like. SOLUTION: The sealing device comprises an elevation unit A for vertically moving an envelope 100 set at its rear surface upward, a conveying means for conveying a double-side adhesive adhesion tape 50 by circulating at a lower side of the unit A, and a folding means for folding a flap 101 to the rear surface side of the envelope 100. The unit A has a retaining block 8 for retaining the envelope 100, a bending head 9 for bending a root part of the flap 100 down and erecting the flap 101 obliquely upward, and an adhering unit 10 for adhering the tape 50 to the rear surface of the envelope 100. The unit A is sequentially moved down from the block 8 to the head 9 and to the unit 10 toward the envelope 100, the head 9 is raised, and then the folding means is operated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing device for automatically sealing and sealing a flap of an envelope with an adhesive film of an adhesive tape, and in particular, to bending of the flap before adhesion and adhesion from the tape. The present invention relates to a sealing device in which transfer formation of a film is optimized.

[0002]

2. Description of the Related Art Conventionally, various types of sealing devices for closing a flap portion after a document is placed in an envelope and manually or automatically sealing the flap portion are known. The automatic sealing device inserts the flap portion of the envelope into the device one by one manually or continuously by a conveying means such as a belt, and applies an adhesive or flaps a double-sided adhesive tape wound in a reel shape. The pressure is supplied to the upper portion and the pressure is reduced, so that the transfer of the adhesive layer is automatically performed.

A sealing device using an adhesive tape is disclosed in, for example, Japanese Utility Model Publication No. Sho 58-35520 and Japanese Patent Laid-Open No. 7-25 / 1995.
197 is disclosed. In the sealing device described in the latter publication, an adhesive tape is stuck to the tip of a flap bent at an acute angle, leaving a horizontal half, and the fold of the flap is inserted between a pair of rollers at the head, and the other half is bonded. The flap is glued to the envelope body with tape.

[0004]

In a sealing device for closing and bonding a flap, both in a manual type and an automatic type, an adhesive layer is formed by bending a flap portion before bonding and a back surface of the flap or the envelope body covered by the flap. And a step of pressing the flap after the application. For example, in a configuration in which the adhesive layer is transferred to the back surface of the flap from a double-sided tape or the like, if the steps of bending the flap and transferring the adhesive layer are performed separately, the processing time of one envelope becomes longer. Would. Further, when the adhesive layer is transferred from the double-sided tape to the flap, the transfer force is likely to be insufficient simply by being inserted between the rollers as described in the above-mentioned publication, and the flap may be peeled off.

[0005] As described above, in the conventional sealing device for transferring the adhesive layer from the double-sided tape or the like to the flap portion, it takes time to bend the flap and transfer the adhesive layer. Performance is greatly reduced. In addition, since there is a surface on which the transfer of the adhesive layer is not sufficient, the flap peels off or becomes wrinkled after sealing, and the appearance of the envelope after sealing becomes poor.

[0006] In the case of sealing an envelope having a different size, it is necessary to change the size of the adhesive layer because the size of the flap is different. However, the conventional structure has a problem that the size of the adhesive layer cannot be automatically optimized according to the size of the envelope.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a sealing device capable of completing a process from bending of a flap to sealing with an adhesive layer in a short time and reliably preventing flap peeling and the like.

[0008]

According to the present invention, there is provided an elevating unit for raising and lowering an envelope set with its back surface facing upward, and a double-sided adhesive tape transporting around the lower side of the elevating unit. Transport means, and a folding means for folding the flap to the back side of the envelope, wherein the elevating unit raises the flap obliquely upward by bending a holding block for holding the envelope, and a base portion of the flap downward. A bending head, and a sticking tool for sticking the adhesive tape to the back surface of the envelope. The bending head is lowered from the holding block toward the envelope in the order of the bending head and the sticking tool, and the bending head is raised. It is characterized in that it has an interlocking relation for activating the folding means later.

According to the present invention, the adhesive tape is attached to the back of the envelope by the attaching tool while the base of the flap is raised by the interlocking relationship between the elevating unit and the folding means, and then the flap is bent by the folding means and adhered by the adhesive tape. It can be reliably sealed in a short time.

[0010] In the present invention, the sticking tool has a sticking head capable of swinging a lower end thereof in a longitudinal direction of the envelope, and is capable of adjusting a sticking position of the adhesive tape to the envelope. can do.

With such a configuration, the adhesive tape can be attached to the back surface of the envelope in accordance with the size of the flap, which varies depending on the size of the envelope, and can be used to seal envelopes of various sizes.

[0012] The transport means may be configured to be capable of adjusting a feed amount of the adhesive tape in accordance with a dimension of the envelope in a width direction.

[0013] In this configuration, since an adhesive tape having an appropriate length with respect to the width of the envelope can be attached, the adhesive can be securely adhered to both ends of the flap in the width direction, and peeling thereof can be prevented.

Further, the folding means is a bending plate which is disposed at a position where the flap covers and which bends the flap to the back surface of the envelope, and includes a buffer mechanism for absorbing a bending load in a rotary drive system of the bending plate. It may be configured.

With this configuration, even if the reaction force load on the bending plate becomes large when the envelope is thick, this can be absorbed by the buffer mechanism, so that maintenance of the rotary drive system can be achieved.
Capable of sealing thin to thick envelopes.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic perspective view showing the appearance of the sealing device of the present invention.

As shown in the figure, the sealing device of the present invention has a table 1a which can be pulled out from an insertion port 1a-1 opened on the front surface of a housing 1, and an envelope 100 is placed on the table 1a, Can be sealed. On the front surface of the housing 1, an operation switch 1b and a switching knob 1c for changing the length of the adhesive tape are provided.

FIG. 2 is a front view schematically showing a sealing mechanism housed in the housing 1, and FIG. 3 is a schematic left side view.

As shown in FIG. 3, a first plate 2a and a second plate 2b are fixed in the housing 1, and a drive motor 3 which is operated by operating an operation switch 1b is fixed to the second plate 2b. I have. 1st, 2nd
Bearings 2 provided between the plates 2a and 2b are provided.
A rotating shaft 4 supported by c and 2d is arranged, and the output shaft 3a of the driving motor 3 and the rotating shaft 4 are connected by a driving pulley 3b, a belt 3c and a driven pulley 3d. A first cam 5a, a second cam 5b, and a third cam 5c are provided on a rotating shaft 4 that is rotationally driven by the drive motor 3.
Are fixed respectively.

On the left side of the front side of the first plate 2a, a tape reel 6a around which a double-sided adhesive tape 50 is wound is provided rotatably as shown in FIG. A take-up reel 6b for winding the cloth (described later) of the tape 50 and a rotatable guide roller 6c are arranged. An elevating unit A for pressing the envelope 100, bending the flap 101 and attaching the adhesive tape 50 is provided at the center of the front side of the first plate 2a. The lifting unit A is moved up and down by a first cam 5a and a link lever (described later). FIG. 4 is a front view thereof, and FIG. 5 is a left side view thereof.

The elevating unit A is disposed on a bracket 7a which can move up and down along the first plate 2a, a pressure receiving plate 7c connected to the bracket 7a by two rods 7b, and a back surface of the first plate 2a. A tension spring 7d for urging the bracket 7a upward is provided as a vertical drive mechanism. Each of the two rods 7b is slidably supported by a slide block 2e fixed to the front surface of the first plate 2a. A holding block 8 for holding down the upper surface of the envelope 100 and a bending head 9 for pressing down the root of the flap 101 to form a bending habit are attached to the bracket 7a so as to be vertically movable. The holding block 8 is provided at the lower end of a rod 8a (omitted in FIG. 4) penetrating the bracket 7a and has a width longer than the width of the envelope 100. Rod 8a
Has a stopper 8b integrally engaged with the upper surface of the bracket 7a, and a compression spring 8c is incorporated between the stopper 8b and the slide block 2e. The bending head 9 has a cross-sectional shape with a tapered lower end as shown in FIG. 5, and has the same width as that of the holding block 8. The bending head 9 is connected to two rods 9a which are inserted into the bracket 7a so as to be movable up and down. Around the rods 9a and between the bending head 9 and the bracket 7a, a compression Spring 9b
Is interposed.

Adhesive tape 5 is provided on the bottom surface of pressure receiving plate 7c.
Sticking tool 1 for sticking 0 on the back of envelope 100
Connect 0. The sticking tool 10 includes a sticking head 10a disposed at a lower end and a rod 10b integrated with the sticking head 10a.
It is connected to the pressure receiving plate 7c via a compression spring 10d. That is, the pin 10c is inserted into the long hole 7c-1 of the pressure receiving plate 7c,
By making the rod 10b rotatable around c, the sticking tool 10 can swing in the left-right direction in FIG. 5, and is displaced in the vertical direction by compressing the spring 10d.

Between the first plate 2a and the second plate 2b, there is provided a link rod 11 driven by the first cam 5a to lower the pressure receiving plate 7c. This link rod 11 is, as shown in FIG.
a camshaft 11a having a support shaft 11a rotatably held by the first and second cams 5a and 2b. This is provided with a pressing roller 11c mounted on the upper surface of 7c. It should be noted that in FIG.
The position of the cam 5a is the origin position, and the link rod 11 is in the position indicated by the two-dot chain line in FIG.
Rises to the highest position. The posture of the link rod 11 indicated by the solid line is the bottom dead center, and the pressure receiving plate 7c is lowered to the lowest position.

FIG. 6 shows the take-up reel 6 using the second cam 5b.
b is a detail of the drive mechanism, (a) is a front vertical sectional view,
(B) is a cross-sectional view of a main part.

As shown in FIG. 1A, a bore block 12 is fixed to the back surface of the first plate 2a. The bore block 12 includes a movable member 12a having a roller 12b abutting against the peripheral surface of the second cam 5b, a rack 12c having a flange 12d fixed at one end, and a flange 12c.
d, two compression springs 12e, 1
2f are arranged respectively. The rack 12c is the first
The intermediate gear 13a meshes with an intermediate gear 13a of a spur gear rotatably disposed on the back surface of the plate 2a, and the intermediate gear 13a meshes with a driven gear 13b attached to a shaft of a take-up reel 6b via a ratchet mechanism (not shown). . Second cam 5
b rotates counterclockwise in FIG. 9A, moves the rack 12c from the position shown in the drawing to the stroke end on the right during the half rotation, and the spring 12
The original position is restored by restoring e and 12f. At this time, while the rack 12c moves to the right, the intermediate gear 13
a rotates clockwise and the driven gear 13b rotates counterclockwise to rotate the take-up reel 6b counterclockwise. The rotation of the take-up reel 6b feeds the adhesive tape 50 nipped between the guide roller 6c and the guide roller 6c. Further, during a period in which the rack 12c moves to the left from the stroke end and returns to the home position, the engagement of the ratchet mechanism provided between the rotation shaft of the take-up reel 6b and the driven gear 13b is released so that The take-up reel 6b is stopped as it is, and only the rack 12c can be returned to the original position.

Here, the envelope 100 to be placed on the table 1a
Are set to 90 mm and 120 mm in width, and the feed amount of the adhesive tape 50 and the change of the adhering position can be changed by the switching knob 1 c in accordance with the size of the envelope 100. The switching knob 1c is, as shown in FIG. 6B, a casing 14 fixed to the back surface of the first plate 2a.
Into which the spindle 14a is inserted.
4b and a second cam portion 14c. FIG. 7 is a schematic vertical sectional view showing the first cam portion 14b. The first cam portion 14b has an arcuate cross-sectional shape and faces a hole 14d opened in the casing 14 for inserting the tip of the rack 12c. I have. In FIG. 7A, the amount of entry of the rack 12c inserted from the hole 14d is long, and in FIG. 7B, it is short. For this reason, as shown in FIG.
If the is rotated, the stroke of the rack 12c is long,
The stroke is short in the rotation posture of FIG. Therefore, by operating the switching knob 1c and setting the first cam portion 14b as shown in FIG. 7A, the rotation angle of the take-up reel 6a is increased so that the take-up reel 6a can be adhered to the 120 mm wide envelope 100. You can send the tape. Further, if the setting is made as shown in FIG. 3B, the rotation angle of the take-up reel 6b becomes small, and the adhesive tape 50 corresponding to the envelope 100 having a width of 90 mm can be fed.

When setting the envelope 100 on the table 1a, the envelope 100 is positioned so that the left edge of the envelope 100 coincides with the left end of the sticking head 10a in FIG.
Thereby, as shown in FIG. 2, the adhesive tape 50 supplied from the left end side of the bonding head 10a is bonded from the edge of the envelope 100 by a length L substantially equal to the width thereof.
Therefore, by changing the feed amount so that the length L becomes 90 mm width and 120 mm width, the adhesive tape 50 corresponding to the width dimension of the envelope 100 can be attached.

FIG. 8 shows details of a mechanism for changing the tape sticking position by the switching knob 1c.
3 is a longitudinal sectional view of a main part, and FIG. 3B is a transverse sectional view taken along a line XX in FIG.

As shown in the figure, a cylindrical box 15 is provided on the back surface of the first plate 2a.
The moving element 15a is arranged so as to be able to move in the left-right direction from 5 toward the rod 10b of the attaching tool 10. The movable member 15a is rotatably provided with a pair of rollers 15b sandwiching the front and rear surfaces of the rod 10b, and is urged to the left in the figure by a spring 15c disposed in the box 15. On the other hand, between the box 15 and the second cam portion 14c of the casing 14, there is provided a connecting rod 16 which moves in the vertical direction in FIG. This connecting rod 16 is the box 1
5 is biased toward the second cam portion 14c by a spring 16a interposed therebetween, and a groove 16b is formed in a surface corresponding to the left end of the movable member 15a as shown in FIG.

FIG. 8 shows a state in which the spindle 14a is in the attitude shown in FIG. 7A by the switching knob 1c, and corresponds to an envelope having a width of 120 mm. That is, the connecting rod 16 is moved to the uppermost position in FIG. 8B due to the relationship with the second cam portion 14c.
The moving element 15a is connected to the connecting rod 1 at a point away from the groove 16b.
6 is in contact. For this reason, the moving element 15a stops at the position moved to the side, and pushes the rod 10b of the sticking tool 10 forward to tilt it obliquely. Also, by rotating the switching knob 1c, the spindle 14a is moved to the position shown in FIG.
8B, the second cam portion 14c moves the connecting rod 16 downward in FIG. 8B. As a result, the groove 16b corresponds to the moving element 15a, and the moving element 15a moves to the left in the same figure, and sets the rod 10b to the posture shown by the dashed line in FIG.

As described above, by operating the switching knob 1c, when the width of the envelope 100 is 120 mm, the feed amount of the adhesive tape 50 is increased, and at the same time, the attaching head 10a of the attaching tool 10 is separated from the first plate 2a. Lean in the direction.
Conversely, if the switching knob 1c is operated so as to correspond to the envelope 100 having a width of 90 mm, the feed amount of the adhesive tape 50 is reduced, and the bonding head 10a is set at a position close to the first plate 2a side. . Therefore, the length of the adhesive tape 50 and the position to which the adhesive tape 50 is attached can be adjusted according to the size of the envelope 100.

FIG. 9 is a longitudinal sectional view showing a mechanism of a main part for bending the flap 101 of the envelope 100, FIG. 10 is a plan view of the main part, and FIG. 11 is a front view of the main part.

A holding block 17 is provided inside the housing 1 for holding the table 1a so that the table 1a can be freely taken in and out.
b. Between the holding block 17 and the bending plate 17a, there is a gap 17c (see FIG. 5) enough to allow the lower end of the bending head 9 to be inserted.
Enters the gap 17c and the flap 1 of the envelope 100
Press and bend the base of 01 downward.

In FIG. 9, a holding block 18 is fixed to the front surface of the second plate 2b.
A slider 18a is slidably mounted in the vertical direction. A bearing 18b, which comes into contact with the peripheral surface of the third cam 5c, is rotatably attached to the upper end of the slider 18a, and a rack 18d is connected to the lower end via a compression spring 18c to form a shock absorbing mechanism. The lower end of the rack 18d is connected to a tension spring 18e disposed on the back surface of the second plate 2b, and urges the slider 18a toward the third cam 5c. Further, on the front surface of the second plate 2a, there is provided a spur tooth intermediate gear 19a rotatably held by the bracket 19 and meshing with the rack 18d.
Are engaged with a driven gear 19b fixed to the rotating shaft 17b.

The adhesive tape 50 is a tape reel 6a.
As shown in FIG. 12, an adhesive layer 52 is formed on the surface of a cloth 51 with a small gap therebetween. Then, by pressing the fabric 51 from above, only the adhesive layer 52 is attached to the back surface of the envelope 100 as shown in FIG. 13, and then the flap 101 is folded to seal.

In the above configuration, during the period in which the operation switch 1b is turned off, the first cam 5a stops in the posture shown in FIG. 4, and the link rod 11 is restrained in the posture shown by the dashed line. At this time, the pressure receiving plate 7c is held at the uppermost stroke end, and the holding block 8, the bending head 9, and the attaching tool 10 are all set to the initial state in FIG. After the adhesive layer 52 is attached to the back surface of the envelope 100, the cloth 51 is taken up by the take-up reel 6b before returning to the initial state in FIG. 5, and a new adhesive layer 52 is attached. It goes under the receiving head 10a.

Here, the table is placed on the table 1a and the opening 1a-
It is assumed that the envelope 100 to be inserted into the box 1 has a width of 120 mm as shown in FIG. In this case, the switching knob 1c
Is in the posture shown in FIG. 1, and the spindle 14a connected to the switching knob 1c is moved to the position 14d as shown in FIG.
The first cam portion 14b faces the first cam portion 14b, and the stroke of the rack 12c is set long. At the same time, the connecting rod 16 is set to the state shown in FIG. 8B by the first cam portion 14c, and the rod 10b of the sticking tool 10 is moved by the moving member 15a to the first position as shown by the solid line in FIG. It is inclined in a direction away from the plate 2a. As described above, the envelope 100 is set so that the base portion of the flap 101 corresponds to the gap between the holding block 17 and the bending plate 17a. The envelope is positioned with the left edge of the envelope 100 aligned with the left end.

When the operation switch 1b is turned on, the drive motor 3 operates to rotate the rotary shaft 4, thereby rotating the first to third cams 5a to 5b integrally. Due to the rotation of the rotating shaft 4, the first cam 5a in FIG. 4, the second cam 5b in FIG. 6A and the third cam 5c in FIG. 11 all rotate counterclockwise. Third cam 5
The lifting operation of the lifting unit A, the feeding of the adhesive tape 50 by the take-up reel 6b, and the rotating operation of the bending plate 17a are interlocked by the respective shapes a to 5c.

When the rotation shaft 4 starts rotating, the first cam 5a
Rotates the link rod 11 to push down the pressure receiving plate 7 from the initial position shown by the dashed line in FIG. 4 to the position shown by the solid line. That is, the elevating unit is in the initial state shown in FIG. 5, and is operated in the order of FIGS. 14 to 16 by pressing the pressure receiving plate 7c by the rotation of the link rod 11. In FIG. 14, the holding block 8 holds the envelope 100 covering the holding block 17 connected to the table 1a. As a result, the envelope 100 has its flap 101 portion placed on the bending plate 17a and is restrained and held on the holding block 17 and the table 1a.

When the first cam 5a further rotates and the pressure receiving plate 7c is pushed down by the link rod 11, FIG.
As shown in FIG. 5, the bending head 9 is connected to the flap 1 of the envelope 100.
The bottom portion of the bending head 9 is pushed into the gap 17c by pushing the base portion of the lower portion 01 downward. Thereby, the bending plate 1
The flap 101 on the upper part 7a is pushed upward and bent, and rises obliquely on the bending plate 17a as shown in FIG.

When the link rod 11 is rotated to its bottom dead center by the rotation of the first cam 5a, the sticking head 10a of the sticking tool 10 abuts against the back surface of the envelope 100 as shown in FIG. By the rotation of 15a, the lifting unit A rises, operates in the order of FIGS. 16 and 15, and the bonding head 10a and the bending head 9 are separated from the envelope 100, respectively. At this time, since the adhesive tape 50 has been fed to the lower surface of the bonding head 10a as described above, the adhesive layer 52 is applied to the envelope 100 as shown in FIG.
Affixed to the back of On the other hand, from the time when the elevating unit A starts to ascend after the bonding of the adhesive layer 52, the second cam 5
6B, the rack 12c is moved rightward in FIG. 6, and the take-up reel 6b is rotated counterclockwise via the intermediate gear 13a and the driven gear 13b. As a result, the cloth 51 from which the adhesive layer 52 has been separated is wound up on the take-up reel 6b, and the adhesive tape 50 holding the adhesive layer 52 from the tape reel 6a goes under the bonding head 10a for the next bonding. To wait.

The bonding head 10 and the bending head 9 are shown in FIG.
9, the slider 18a is pushed downward by the third cam 5a in FIG.
The rack 18d connected to the slider 18a descends. Thereby, the bending plate 17a rotates clockwise approximately 180 degrees from the posture of FIG. 9 by the rotation transmission of the intermediate gear 19a and the driven gear 19b. Therefore, the bending plate 17a bends the flap 101 which is inclined above, and the back surface of the flap 101 is turned over in FIG.
And sealed. Thereafter, the slider 18a rises in FIG. 9 due to the shape of the third cam 5a, pulls up the rack 18d, and
a is returned to the initial position in FIG. At the same time, the rotation of the first cam 5a while the rotation shaft 4 makes one rotation causes the pressing block 8 shown in FIG. 14 to rise and return to the initial state of FIG.

As described above, just by setting the envelope 100 on the table 1a and turning on the operation switch 1b,
The holding block 8 holds and holds the envelope 101, the bending head 9 bends the flap 101, the bonding head 10a bonds the adhesive layer 52 from the adhesive tape 50, and the bending plate 17a bends the flap 101 and bonds the bonding layer 52. Is automatically performed.

In the above example, an envelope having a width of 120 mm shown in FIG. 13B is used. At this time, the amount of winding of the winding reel 6b by the switching knob 1c and FIG.
The distance between the formation length of the adhesive layer 52 corresponding to the envelope 100 having a width of 120 mm and the base of the flap 101 is adjusted by the tilting operation mechanism for the sticking head 10 with respect to the rod 10b. That is, the adhesive layer 52 is formed on the back surface of the envelope 100 so as to correspond to the entire width of the flap 101 and the leading end when bent. On the other hand, when using the envelope 100 having a width of 90 mm shown in FIG. 13A, the first cam portion 14b of the spindle 14a is set to the posture shown in FIG. 7B by operating the switching knob 1c. Is shortened, and the winding length of the winding reel 6b is shortened. At the same time, by the mechanism shown in FIG. 8, the rod 10b of the sticking tool 10 is set to the posture indicated by the one-dot chain line in FIG. As a result, FIG.
As shown in (a), the adhesive layer 52 formed on the back surface of the envelope 100 has a flap 101 as compared with the one having a width of 120 mm.
It is close to the side and its length also corresponds to a width of 90 mm. Thus, even if the size of the envelope 100 changes, the position and length of the adhesive layer 52 formed by the adhesive tape 50 can be changed according to the size of the envelope 100 only by operating the switching knob 1c. The length of the adhesive layer 52 corresponds to the length of the adhesive tape 50 along the length L from the left end to the lower end of the bonding head 10a in FIG.

Also, since the thickness of the envelope 100 varies depending on the paper quality, if the pressing force by the bending plate 17a is constant, if the envelope 100 is thick, the rack 1
An excessive load is applied to 8d and the intermediate gear 19a. On the other hand, a rack 18d that rotationally drives the bending plate 17a
Is biased by the compression spring 18c, so that when the envelope 100 is thick, a play operation in which the rack 18d escapes upward is possible. Therefore, the rack 18d
And the intermediate gear 19a are quickly meshed with each other, and damage due to load can be prevented.

[0046]

According to the present invention, the adhesive tape is stuck to the back of the envelope by the sticking tool while erecting the base of the flap by the interlocking relationship between the elevating unit and the folding means, and then the flap is bent by the folding means. And can be securely sealed in a short time.
Workability can be improved.

Further, in the configuration in which the position and length of the adhesive tape can be adjusted, the sealing can be performed with the adhesive tape corresponding to the size of the flap according to the width of the envelope, and peeling of the flap can be prevented. Further, in the case where the rotary drive system of the bending plate of the folding means is provided with a buffer mechanism for absorbing a load, the effect of the reaction force load can be suppressed even for a thick envelope, and the durability of the apparatus is improved.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing the appearance of a sealing device of the present invention.

FIG. 2 is a front view schematically showing the internal structure of the sealing device.

FIG. 3 is a left side view schematically showing the internal structure of the sealing device.

FIG. 4 is a front view of a main part showing a connecting structure of a lifting unit, a first cam, and a link rod.

FIG. 5 is a left side view showing an initial state of the lifting mechanism.

FIGS. 6A and 6B are detailed views showing a winding mechanism of the adhesive tape, wherein FIG. 6A is a front vertical sectional view of a main part, and FIG.

7A and 7B are main parts of a first cam portion of a spindle connected to a switching knob, wherein FIG. 7A illustrates a posture of the first cam portion for increasing a stroke of a driving rack, and FIG. It is a longitudinal section showing the posture of the 1st cam part.

8A and 8B are details of a mechanism for changing a position at which an adhesive tape is attached by using an attaching tool, wherein FIG.
FIG. 2B is a cross-sectional view of a main part taken along line XX of FIG.

FIG. 9 is a longitudinal sectional view of a main part showing details of a bending mechanism of an envelope flap together with a drive system thereof.

FIG. 10 is a plan view of a main part showing a mechanism for bending an envelope flap together with a table.

FIG. 11 is a front view of a main part showing a drive system of a bending mechanism of an envelope flange.

FIG. 12 is an explanatory diagram showing a configuration of an adhesive tape used in the sealing device of the present invention.

13A and 13B are diagrams in which an adhesive layer of an adhesive tape is formed on the back surface of an envelope, where FIG. 13A shows a position where an adhesive layer is formed on an envelope having a width of 90 mm, and FIG. Indicates the formation position.

FIG. 14 is a left side view of the main part when the elevating unit is lowered and the envelope is fixed and held by the holding block.

FIG. 15 is a left side view of the main part when the elevating unit is lowered to a position where the envelope of the flange is bent by the bending head.

FIG. 16 is a left side view of the main part when the elevating unit is lowered until the sticking head of the sticking tool hits the back surface of the envelope.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 1a Table 1b Operation switch 1c Switching knob 2a 1st plate 2b 2nd plate 3 Drive motor 4 Rotating shaft 5a 1st cam 5b 2nd cam 5c 3rd cam 6a Tape reel 6b Take-up reel 7a Bracket 7b Rod 7c Pressure receiving plate 7c-1 Long hole 7d Spring 8 Holding plate 8a Rod 8b Stopper 8c Spring 9 Bending head 10 Sticking tool 10a Sticking head 10b Rod 10c Pin 10d Spring 11 Link rod 11a Support shaft 11b Copying roller 11c Pressure roller 12c Rack 12c 13a Intermediate gear 13b Driven gear 14 Casing 14a Spindle 14b First cam part 14c Second cam part 14d Hole 15 Box 15a Moving element 15b Roller 15c Spring 16 Connecting rod 16a Spring 16b Groove 17 Holding block 17a Bending plate 17b Rotating shaft 17c Gap 18 Holding block 18a Slider 18b Bearing 18c Spring 18d Rack 18e Spring 19 Bracket 19a Intermediate gear 19b Driven gear 50 Adhesive tape 51 Adhesive tape 51 Cloth 52 Flap A Elevating unit

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shinichi Hamasaki 759 Imayoshino, Kanamoto-cho, Shimonashiki-gun, Kumamoto Prefecture 1 F-term in Koto Manufacturing Co., Ltd. (reference) 3E094 AA12 BA14 CA33 DA08 EA06 HA03

Claims (4)

[Claims] An elevating unit for elevating and lowering an envelope set with the back surface facing upward, a conveying means for conveying a double-sided adhesive tape around the lower side of the elevating unit, and a flap comprising: Folding means for folding on the back side of the envelope, wherein the elevating unit comprises a holding block for holding the envelope, a bending head for bending a base portion of the flap downward to raise the flap obliquely upward, and the adhesive tape. And a sticking tool for sticking the folding means to the back side of the envelope, lowering the bending head and the sticking tool from the holding block toward the envelope in this order, and operating the folding means after the bending head is raised. A sealing device characterized by having a relationship. 2. The sticking device according to claim 1, further comprising a sticking head having a lower end swingable in a longitudinal direction of the envelope, and a position at which the adhesive tape is stuck to the envelope. The sealing device according to claim 1, wherein 3. The sealing device according to claim 1, wherein the transporting means is configured to adjust a feed amount of the adhesive tape in accordance with a dimension of the envelope in a width direction. 4. The folding means is a bending plate which is disposed at a position where the flap covers, and which bends the flap to the back surface of the envelope, and includes a buffer mechanism for absorbing a bending load in a rotary drive system of the bending plate. The sealing device according to any one of claims 1 to 3, wherein