JPH0734804Y2 - Envelope jaw opening / closing mechanism of envelope transport device - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application] This invention mechanically encloses an enclosure such as a data book or collated copy in an envelope,
Further, the present invention relates to an envelope conveying device in an automatic enclosing and sealing machine that automatically seals this, and more particularly to an envelope jaw opening / closing mechanism of the envelope conveying device.

[0002]

2. Description of the Related Art The operation of a conventional automatic encapsulation and sealing system will be described with reference to FIG. 7, which comprises an enclosure hopper 1, an enclosure transport line 2 and an envelope transport line 3. The inclusions taken out from each station consisting of 9 are intermittently taken out onto the inclusions carrying line 2, and the inclusions taken out from the second station 5 are stacked on the inclusions taken out from the first station 4, and the like. Then, they are sequentially stacked on the inclusions taken out from the preceding station and intermittently conveyed. On the other hand, the envelope transfer line 3 includes an envelope hopper 10 and a flap opening section 1.
1, the enclosing unit 12, the enclosing unit 13, and the envelope stack unit 14, the envelope taken out from the envelope hopper 10 is automatically opened by the flap opening unit 11, and is conveyed in parallel with the stacked inclusions. . Next, the inclusions and the envelope that have been intermittently conveyed are automatically enclosed in the enclosure 12, and after being sealed, they are stacked in the envelope stack 14 .

The envelope transfer line 3 will be described with reference to FIGS. In the envelope transfer line 3, a transfer chain 16 in which envelope jaws 15 are arranged at appropriate intervals is provided with sprockets 17 and 18 and guide sprockets 19 and 2.
The envelope jaws 15 are stretched to 0, and the envelope jaws 15 are moved to each envelope hopper 1 when intermittently moved.
0, the flap opening portion 11, the enclosing portion 12, the sealing portion 13, and the envelope stack portion 14 are arranged so as to stop at predetermined positions. When the conveying chain 16 is driven intermittently and the envelope jaws 15 open and stop at the position of the sprocket 17, the lowermost envelope stacked in the envelope hopper 10 is pulled out by the suction cup 22, and the kicker 23 pushes forward to push the envelope. The end portion is inserted into the opened envelope jaw 15.

Next, when the transport chain 16 is driven, the envelope jaws 15 are closed and the envelope is clamped and transported. When the envelope reaches the flap opening portion 11, the flap is lifted and opened. Further, the envelope held by the envelope jaws 15 has the flap opening portion 11
Is intermittently conveyed to the enclosing unit 12. In the enclosing portion 12, the upper surface of the envelope is pulled up by a suction cup 24 while opening the flap while opening the flap, and the push-out arm 25 that can advance and retreat the stacked inclusions.
Press to seal. In the sealing section 13, the flap is folded back and sealed at the same time when the flap is wetted by the water brush, and when the flap reaches the envelope stack section 14, the envelope jaw 15 opens to release the envelope.

As shown in FIG. 9, the envelope jaw 15 comprises a lower jaw 26 and an upper jaw 27, the side plates of which are pivotally supported by the pins of the transport chain. That is, the lower jaw 26 is formed so that the chain attaching portions 29 are provided on both sides of the holding portion 28 and the transport chain 16 is inserted inside the lower jaw 26. A spring mounting portion 30 is provided so as to project from the portion 29. On the other hand, the upper jaw 27 is provided with a leg portion 32 which is inserted between the transport chain 16 and the chain attaching portion 29 from the cutout portion of the lower jaw 26 on the advancing direction side of the holding portion 31 facing the holding portion 28. Therefore, the lower portion of the leg portion 32 is a pin contact portion 33. The chain mounting portion 29 of the lower jaw 26 is pivotally supported by the pin 35 of the transport chain 16, and the chain mounting portion 29 of the lower jaw 26 and the leg portion 32 of the upper jaw 27 are pivotally supported by the adjacent pin 36. , The coil spring 3 in the spring mounting portion 30 and the pin contact portion 33.
7 is attached. Therefore, the lower jaw 26 is fixed to the transport chain 16, while the upper jaw 27 is pin 3
It is rotatable by 6, and the holding portion 28 and the holding portion 31 are crimped by a coil spring 37.

Next, referring to FIG. 10, the envelope jaw 1
The open / closed state when the envelope of 5 is released will be described. When the envelope jaw 15 moved by the intermittent drive of the transport chain 16 reaches the sprocket 18, the upper jaw 2
The jaw opening / closing pin 38 protruding from the side surface of the sprocket 18 comes into contact with the lower surface of the pin contact portion 33 of the leg portion 32 of No. 7. The jaw opening / closing pin 38 is an envelope jaw 15
When it reaches the sprocket 18, the sprocket 1 is provided closer to the peripheral edge of the sprocket 18 than the lower end surface of the pin contact portion 33 of the upper jaw 27, that is, outside.
With the rotation of 8, the pin contact portion 33 is pushed up against the coil spring 37. When the pin abutting portion 33 is pushed up, the upper jaw 27 is rotated and the holding portion 31 is raised, so that the holding portion 28 and the holding portion 31 are opened apart. In this way, the opening of the envelope jaws 15 stops the transportation on the envelope transportation line. Further, when the sprocket 18 rotates and the envelope jaw 15 moves, the pin contact portion 33 finally comes off the jaw opening / closing pin 38.

[0007]

In the opening / closing mechanism of the envelope jaw 15 having the above structure, the jaw opening / closing pin 3 is used.
The upper jaw 27 is rotated by 8 and the holding portion 28 and the holding portion 31 are opened to the maximum just before the jaw opening / closing pin 38 is disengaged from the pin contact portion 33. Then, at the same time when the jaw opening / closing pin 38 is disengaged from the pin abutting portion 33, the holding portion 28 and the holding portion 31 are closed by the coil spring 37.
At this time, since the holding portion 28 and the holding portion 31 collide with each other due to the tension of the coil spring 37, a loud noise is generated. Since this noise is continuously generated while the transport chain 16 is operating, it is a big noise. When the enclosure is held on the sprocket 17 side, the enclosure is inserted so that a loud noise is not generated, but on the sprocket 18 side, a large noise is generated, and its solution has been desired.

The present invention has been made in view of the above situation, and an object thereof is to provide an envelope jaw opening / closing mechanism of an envelope transporting device which does not generate a sound when the envelope is released.

[0009]

In order to achieve the above object, this invention has the following constitution. That is, a jaw opening / closing block having a jaw sliding surface of a fixed length is disposed on at least one side of the sprocket on the advancing direction side of the envelope conveying chain, and the outer end of the jaw sliding surface is attached to the envelope conveying chain. When the envelope jaw reaches the sprocket, the envelope jaw is formed so as to be positioned closer to the outer edge portion of the sprocket than the lower end surface of the leg of the upper jaw constituting the envelope jaw. The jaw opening / closing block may be attached directly to the side surface of the sprocket or may be attached to a wheel fixed to the drive shaft. The jaw opening / closing block is attached to the other end of a horseshoe-shaped lever whose one end is rotatably supported on a wheel fixed to a drive shaft, and a cam follower is provided on the lever to mount the cam follower on the drive shaft. It may be configured to contact a plate cam provided on the inner side of the side plate that is axially supported.

[0010]

[Operation of the device] The jaw sliding surface of the jaw opening / closing block is
Since the upper jaw that makes up the envelope jaw is brought into contact with the lower surface of the leg portion of the upper jaw to rotate the upper jaw as the sprocket rotates, the gripping portion that is crimped is opened. Further, when the sprocket rotates, the jaw opening / closing block is located above the envelope jaws, and since the jaw sliding surface has a certain length, the lower end surface of the leg portion of the upper jaw slides on the jaw sliding surface. Go down while sliding on the surface,
After the upper jaw and the lower jaw are gradually closed and the holding portions are pressure-bonded to each other, they work to separate from the sliding surface of the jaw.

[0011]

EXAMPLES The present invention will be described in detail below based on examples. 1 is a front view of an essential part for explaining an envelope jaw opening / closing mechanism according to the present invention, FIG. 2 is a sectional view taken along the line AA in FIG. 1, and FIG. 3 is a sectional view taken along the line BB in FIG. A sprocket 41 that drives the transport chain 16 is fixed to a drive shaft 42 that is rotatably supported by side plates 43 and 44, and a drive pulley 45 is provided at one end of the drive shaft 42. Further, the drive shaft 42 is provided with wheels 47, 47 by a key 46 for fixing the sprocket 41.
Is fixed. Therefore, the wheels 47, 47 rotate integrally with the sprocket 41 by the drive shaft 42. Approximately half of the outer circumference of the wheels 47, 47 are notched to save material and reduce weight, and for screw relief.

Horseshoe-shaped levers 48, 48 are arranged on the wheels 47, 47. That is, as is apparent from FIG. 1, one end of the levers 48, 48 has bearings 49, 4
9 is rotatably supported by wheels 47, 47, and has a substantially triangular jaw opening / closing block 5 inside the other end.
2, 52 are attached by fixing pins 53, 54. The levers 48, 48 are attached to the outside of the wheels 47, 47, but the jaw opening / closing block 52,
52 is mounted inside the wheels 47, 47. The jaw sliding surface 5 is provided on the jaw opening / closing blocks 52, 52.
8 and 58 are formed and contact the pin contact portion 33 of the upper jaw 27. The jaw opening / closing blocks 52, 5
The second fixing pin 54, 54 has a coil spring 62 between the spring mounting pin 59, 59 protruding from the wheel 47, 47,
62 is attached.

Further, cam followers 50, 50 which come into contact with a plate cam described later are provided at substantially central portions of the levers 48, 48. The outer peripheral surfaces of the cam followers 50, 50 are attached so as to protrude from the inner peripheral surfaces of the levers 48, 48 so as to easily contact the plate cams. Thus, the levers 48, 48 and the jaw opening / closing blocks 52, 5
2 is attached to wheels 47, 47 fixed to the drive shaft 42, so that the drive pulley 45 rotates with the sprocket 41. On the other hand, the side plate 43 and the side plate 4
The inner surface of 4 is a plate cam 6 with which the cam follower 50 contacts.
3, 63 are attached. The levers 48, 48
Since one end of is supported by the wheels 47, 47 and the other end is pulled by the coil springs 62, 62,
The cam followers 50, 50 always rotate while being in contact with the outer peripheral surfaces of the plate cams 63, 63.

Next, the open / closed state of the envelope jaw 15 in the above configuration will be described with reference to FIGS. 4 and 5.
First, when the transport chain 16 reaches the sprocket 41 by intermittent driving, the jaw sliding surface 58 of the jaw opening / closing block 52 comes into contact with the pin abutting portion 33 of the leg portion 32 of the upper jaw 27 and pushes it up as the sprocket rotates (see FIG. Four
reference). When the leg portion 32 is pushed up, the upper jaw 27 is rotated and the holding portion 31 is opened, so that the envelope is released and the conveyance of the envelope is stopped. In addition, sprocket 4
When 1 rotates, the cam follower 50 rotates while coming into contact with the outer peripheral surface of the plate cam 63, and the envelope jaw 15 moves away from the jaw opening / closing block 52.
The pin abutment portion 33 of the leg portion 32 of 7 is the jaw opening / closing block 5
It descends toward the drive shaft 42 while sliding on the second jaw sliding surface 58.

At this time, the bearing 49 causes the wheel 47 to move.
Since the tip of the lever 48 rotatably supported by the coil spring 62 is biased inward by the coil spring 62, the jaw open / close block 52 is moved inward while the cam follower 50 is in contact with the outer peripheral surface of the plate cam 63. Will be lowered. By pulling the jaw opening / closing block 52 inward,
The sliding time between the pin contact portion 33 of the upper jaw 27 and the jaw sliding surface 58 can be lengthened. In this way, the gripping portion 28 and the gripping portion 31 are gradually closed, and the pin abutting portion 33 is disengaged from the jaw sliding surface 58 after they are completely crimped (see FIG. 5). Therefore, the lower jaw 26
Even if the upper jaw 27 is pulled by the coil spring 37, the upper jaw 27 does not collide, so that no noise is generated during crimping and the upper jaw 27 is closed gently.

As in the above embodiment, the jaw opening / closing block 52 is fixed to the lever 48, the lever 48 is brought into contact with the plate cam 63 via the cam follower 50, and the jaw opening / closing block 52 fixed to the other end is moved outward. The configuration in which the jaw sliding surface 58 of the jaw opening / closing block 52 cannot be formed to be large is particularly effective in pushing up.

FIG. 6 shows a second embodiment in which the jaw opening / closing block 65 is directly fixed to the wheel 66. That is, inside the wheels 66, 66 fixed to the drive shaft 67 together with the sprocket 68, the jaw opening / closing block 65 having a substantially triangular shape has the tip 73 of the jaw sliding surface 72 directed toward the drive shaft 67 and the fixing pins 69, 70. Is fixed by. As in this embodiment, the jaw sliding surface 7
2 can be formed sufficiently long, the leg portion 32 of the upper jaw 27 slides on the jaw sliding surface 72 while the gripping portion 28 and the gripping portion 31 are gradually closed and then completely crimped. The portion 32 can be disengaged from the jaw sliding surface 72. Therefore, the lever and the plate cam can be omitted as compared with the first embodiment, so that the structure can be simplified.

The wheel 66 has only to have a size capable of fixing the jaw opening / closing block 65. Further, the jaw opening / closing block 65 may be directly fixed to both sides of the sprocket 67 without being fixed to the wheel 66.
When the jaw opening / closing block 65 is directly fixed to the sprocket 67, the parts can be further simplified. Further, the jaw opening / closing block in the above embodiment is not limited to the triangular shape as long as it has the jaw sliding surface, and may have any shape.

[0019]

The envelope jaw opening / closing mechanism in the envelope conveying apparatus according to the present invention has a jaw opening / closing block having a jaw sliding surface of a certain length on at least one side surface of the sprocket, and when the envelope is released and then closed again. While sliding the leg part of the upper jaw on the jaw sliding surface, the upper jaw and the lower jaw are gradually closed to crimp each other, and then the leg part of the upper jaw is detached from the jaw sliding surface. No sound is generated due to the collision of. Therefore, the problem of noise during driving can be solved and a quiet envelope transporting device can be provided.

[Brief description of drawings]

FIG. 1 is a front view for explaining an essential part of an envelope jaw opening / closing mechanism according to the present invention.

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

3 is a sectional view taken along line BB in FIG. 1.

FIG. 4 is a front view for explaining a state in which an envelope jaw is opened by a jaw opening / closing block.

FIG. 5 is an explanatory front view showing a state where the envelope jaw is rotated by 120 degrees.

FIG. 6 is a front view for explaining an envelope jaw opening / closing mechanism according to a second embodiment.

FIG. 7 is an operation explanatory view of a conventional automatic enclosing and sealing machine.

FIG. 8 is a configuration diagram for explaining an envelope transport device.

FIG. 9 is a top perspective view of an envelope jaw attached to a transport chain.

FIG. 10 is an explanatory front view continuously showing the opened / closed state of the envelope jaws.

[Explanation of symbols]

 41 sprockets 42 drive shafts 43 to 44 side plates 45 pulleys 47 wheels 48 levers 49 bearings 50 cam followers 52 jaw opening / closing blocks 53 bearings 54 fixing pins 58 jaw sliding surfaces 59 spring mounting pins 62 coil springs 63 plate cams 65 jaw opening / closing blocks 66 wheels67 drive shaft 68 sprockets  72 Jaw sliding surface

Claims (4)

[Scope of utility model registration request] 1. A jaw opening / closing block having a jaw sliding surface of a fixed length is provided on at least one side of a sprocket on the advancing direction side of an envelope transport chain, and an outer end of the jaw sliding surface has an envelope. When the envelope jaw attached to the conveyor chain reaches the sprocket, it is formed so as to be positioned closer to the outer edge side of the sprocket than the lower end surface of the leg of the upper jaw that constitutes the envelope jaw. Envelope jaw open / close mechanism. 2. The jaw opening / closing block is directly attached to a side surface of a sprocket.
Envelope jaw open / close mechanism for the envelope transport device. 3. The envelope jaw opening / closing mechanism of the envelope carrying apparatus according to claim 1, wherein the jaw opening / closing block is attached to a wheel fixed to a drive shaft. 4. The jaw opening / closing block is attached to the other end of a horseshoe-shaped lever whose one end is rotatably supported on a wheel fixed to a drive shaft, and a cam follower is provided on the lever to mount the cam follower. 2. An envelope jaw opening / closing mechanism for an envelope transporting device according to claim 1, wherein the drive shaft is brought into contact with a plate cam provided inside a side plate which supports the drive shaft.