JPH0464928B2 - - Google Patents

Description

Detailed Description of the Invention Object of the Invention (Industrial Application Field) The present invention relates to a rotary conveyor belt used in various machines, for example, for cutting a cylindrical film to a predetermined length and cutting the cut portion. A bagging and packaging machine for fruits and vegetables, etc., which seals the bag to form a bag, expands the opening of the packaging bag, inserts the contents from there, ties the opening and discharges the bag (for example, Japanese Patent Application Laid-Open No. 174413
(see Japanese Patent Publication No. 2003-110000) relates to a rotary conveyance belt that twists the opening of a packaging bag containing stored items.

(Problems to be solved by the prior art and the invention) Conventionally, in this type of bagging and packaging machine,
As described in Publication No. 59-124240, a rotary belt comes into contact with one side of a packaging bag suspended from a clamp member to twist the opening of the packaging bag. There is. In order to ensure this twisting, it is necessary to reduce slippage between the packaging bag and the rotating belt. It is also necessary to devise measures to prevent damage to the contents inside the packaging bag.

Therefore, the present invention provides an improved outer circumferential surface shape of a rotating belt used in such bagging and packaging machines and other various machines.

Structure of the Invention (Means for Solving Problems) That is, the present invention is provided along the conveyance direction of an article 61 to be conveyed, and rotates with the outer circumferential surface 12a in contact with the side surface of the article 61. In the endless rotating conveyor belt 12, the outer peripheral surface 12
a is made of an elastic material, and the belt 12
The belt 12 is formed into a continuous wave shape along the rotating direction, and a space 6 is formed inside the belt 12 forming a convex part of the wave shape.
The main point is that 7 was formed.

(Function) Then, the article 61 is placed on the outer peripheral surface 1 of the rotating belt 12.
It is pushed by the wave-shaped convex portion 2a.

(Example) Hereinafter, an example in which the present invention is embodied in a conveyance device to a bag opening binding device of a bag filling and packaging machine will be described with reference to the drawings.

As shown in FIG. 1, a clamp member 1 is supported between a pair of parallel main chains 2, and a second
As shown in the figure, it moves in the direction of arrow A on the conveyance device 11 and reaches above the binding and cutting device 20. In this clamp member 1, as shown in FIG. 6, a pair of fixed clamping plates 3 are installed facing each other.
A support shaft 4 supported on the upper surface of both fixed clamping plates 3 has a
Each pair of movable clamping plates 5 formed in a fork shape are supported so as to be rotatable and movable in the axial direction. The clamping arm 6 of each movable clamping plate 5 extending downward from the inside of the support shaft 4 is adapted to come into contact with the clamping surface 3a on the inside of the fixed clamping plate 3. or,
A cam roller 8 is supported by a slide shaft 9 on a movable arm 7 of each movable clamp plate 5 extending from the support shaft 4 to the outside of the fixed clamp plate 3, and the movable arm 7 of the movable clamp plate 5 moves along the support shaft 4. At this time, the cam roller 8 also moves along the slide shaft 9 together with the movable arm 7. Both ends of this slide shaft 9 are biased in the direction of arrow B by a spring 10, and the clamping arms 6 of the movable clamping plate 5 and the clamping surface 3 of the fixed clamping plate 3
a and are always closed. and,
The fixed clamping plate 3 and the movable clamping plate 5 constitute a gripping section. As shown in FIGS. 1 and 6, the packaging bag 61 containing the contents is held at its mouth end between the clamping arm 6 of the movable clamping plate 5 and the clamping surface 3a of the fixed clamping plate 3. It is designed to be suspended.

In the conveying device 11, as shown in FIG. 2, an endless main rotating belt 12 as a rotating conveying belt is disposed along the moving direction A of the clamp member 1, and a hanging packaging bag 61 as an article is disposed. The housing portion 61a is adapted to come into contact with one side of the housing portion 61a. This main rotating belt 12 rotates in the same direction as the moving direction A of the clamp member 1 while in contact with the packaging bag 61, and its rotation speed is slower than the moving speed of the clamp member. Further, an auxiliary rotating belt 13 is arranged opposite to the main rotating belt 12, and rotates in the opposite direction to the main rotating belt 12 to move the hanging packaging bag 61 between the main rotating belt 12 and the auxiliary rotating belt 13. invite.

A pair of upper and lower guide rods 14 are disposed above and inside the main rotating belt 12, and an endless feed chain 15 is disposed above the auxiliary rotating belt 13, facing the guide rods 14. A guide passage 16 is formed between the guide rod 14 and the feed chain 15. Both guide rods 1
4 reaches the bundle cutting device 20, and the lower guide rod 1
4 is inclined downward toward the device 20.

A plurality of first feed claws 17 are attached to the feed chain 15 at equal intervals, and the hanging packaging bags 61
When the mouth 62 of the guide passage 16 moves through the guide passage 16, the mouth 62 is pushed in the direction of movement A. A second feed pawl 19 is supported on the lower surface of the sprocket 18 adjacent to the bundle cutting device 20 among the sprockets on which the feed chain 15 is stretched, so as to maintain a constant distance from the lower surface. It is designed to protrude slightly outward from the outer periphery of. When the sprocket 18 rotates as the feed chain 15 rotates, the first feed pawls 17 of the feed chain 15 and the tips 19a of the second feed pawls 19 of the sprocket 18 rotate the windings of the sprocket 18 of the feed chain 15. They move in a state where they face each other at a fixed interval in the vertical direction by the hanging angle range.

As shown in FIGS. 2 and 3, the main rotating belt 12 has an outer circumferential material 64 attached to the entire outer circumferential surface of a base material 63 in a wave shape along the rotation direction thereof,
A space 67 is formed between the inner surface of the portion of the outer peripheral material 64 that forms the wave-shaped convex portion and the outer peripheral surface of the base material 63 . This outer circumferential material 64 is made by pasting an inner meandering plate 64a and an outer rubber plate 64b to each other, and the corrugated outer circumferential surface 12a of this rubber plate 64b has a groove that intersects with the rotational direction of the main rotating belt 12. A large number of concave lines 65 and convex lines 6
6 are formed alternately in the continuous direction of the wave shape, and each of the uneven strips 65, 66 has a large number of concave portions 65a, 66a and convex portions 6 along the extending direction.
5b and 66b are formed alternately.

A binding passage 21 linearly continuous with the guide passage 16 of the conveying device 11 is formed in the binding cutting device 20, and the first feeding claw 17 and the second feeding claw 19 are separated from each other at the entrance 21a of the binding passage 21. They are now approaching each other and facing each other. As for the pasting mechanism of the bundle cutting device 20, as shown in FIG. On the other side edge of the binding passage 21, a holding member 25 is rotatably attached to a shaft 27, which is pressed against the outer periphery of the rotating member 22 by the force of a spring 26. The tip end 28a of the tape 28 installed in the binding cutting device 20 is set so as to be held between the rotating member 22 and the pressing member 25. Further, on one edge of the further back side of the binding passage 21, a bifurcated cutting member 29 having a cutter 30 and an engaging protrusion 31 is rotatably attached to a shaft 32.
cutter 3 by the bias of the spring 33.
0 retreats from the binding passage 21, and the engaging protrusion 31 blocks the binding passage 21.

A discharge port 3 is provided at the end 21b of the binding passage 21 located below the engaging protrusion 31 of the cutting member 29.
4 are continuously formed, and an arc-shaped cutting passage 35 is formed above the discharge port 34 and continuous to the unfinished end 21b so as to deviate to one side from the moving direction A of the bag opening 62. . A circular cutter 3 is provided on one side of this cutting passage 35 (near the extension line of the binding passage 21).
6 is supported, and a part of the cutting edge 36a on its outer periphery blocks the cutting passage 35 and is embedded below one side edge 35a of the passage 35. This circular cutter 36 is driven via a belt 37 and a pulley 38 as shown in FIG.

As shown in FIG. 6, a guide plate 39 rotatably supported by a support shaft 40 is provided above between both main chains 2 and extends in the moving direction A of the clamp member 1. A bracket 41 fixed to the upper surface of the proximal end of the bracket 39 and the drive shaft 4 above the bracket 41
A connecting rod 44 is rotatably attached to shafts 45 and 46 between the distal end of a rotary arm 43 fixed to the rotary arm 2 . Then, when the rotating arm 43 rotates with the rotation of the drive shaft 42, the guide plate 39 moves toward the support shaft 40.
It is designed to be tilted via a connecting rod 44 between the highest position shown in FIG. 6 and the lowest position shown in FIG. The guide plate 39 at the highest position is inclined upward in the moving direction A of the clamp member 1, and the guide plate 39 at the lowest position is substantially horizontal.

As shown in FIG. 6, a presser member 47 is movably supported on the guide plate 39.
7 is a roller 48a that rolls along the guide plate 39;
The vehicle chassis 48 is comprised of a chassis 48 having a diameter of 1.5 mm, and a pair of presser plates 49 attached to the lower part of the chassis 48, and the presser plates 49 are arranged such that the distance between them increases as they move downward. Further, a stopper 50 is fixed to the base end side of the guide plate 39 so that its position can be adjusted.
As shown in FIG. 6, when the guide plate 39 is at the highest position, the chassis 48 of the presser member 47 comes into contact with the stopper 50 to prevent the guide plate 39 from moving any further toward the proximal end.

As shown in FIG.
An air blowing pipe 5 is attached to the presser plate 49 on one side of the air blowing pipe 5.
1 is attached and its outlet 51a is connected to both presser plates 49.
An air supply hose 52 is connected to the air blowing pipe 51. Air is discharged from the air outlet 51a of the air blowing pipe 51 to the clamp member 1.
The water is ejected diagonally downward toward the space between the two fixed clamping plates 3.

As shown in FIG. 2, a discharge pipe 53 is disposed on the rear side of the bundle cutting device 20, and a discharge port 54 is opened on the upper surface closer to one side than directly behind the circular cutter 36. An air jet pipe 55 is attached to one side of the discharge port 54, and an air supply hose 56 is connected to this air jet pipe 55. Air is ejected from the ejection port 55a of the air ejection pipe 55 toward the discharge port 54 as shown by the arrow.

Now, the packaging bag 61 suspended from the clamp member 1
is transferred toward the bundle cutting device 20, and the packaging bag 6
1 housing portion 61a is the main rotating belt 1
2, the housing portion 61a is forcibly rotated in the direction of arrow P in FIG. 62 is twisted in the anti-P arrow direction. The other side of the housing portion 61a of the packaging bag 61 also comes into contact with the auxiliary rotating belt 13 that rotates in the opposite direction to the main rotating belt 12, thereby promoting the twisting. The first of the feed chain 15
The feed pawl 17 supports the middle opening 62 of the packaging bag 61 to prevent it from wobbling, and especially performs a wobbling prevention function when twisting is applied. Also, packaging bag 61
As the bag approaches the binding cutting device 20, the lower guide rod 14 that slopes lowers the housing portion 61 of the packaging bag 61.
The shoulder part of a is pressed downward, and together with the above-mentioned twisting action, the stored items can be packed even more tightly.

In particular, in this embodiment, since the outer circumferential surface 12a of the main rotating belt 12 has a wave shape, when the packaging bag 61 is transferred while being twisted as described above, it is pushed by the convex portion of the same wave shape. . Therefore, slippage between the packaging bag 61 and the main rotary belt 12 is prevented, and the bag opening 62 is reliably twisted, so that the accommodation portion 61a of the packaging bag 61 can be reliably squeezed without any gaps. Moreover, this outer peripheral surface 12a
There are uneven stripes 65, 66 and their uneven portions 65.
a, 65b, 66a, and 66b, slipping is further prevented. or. Main rotating belt 12
Since the space 67 can provide a cushioning effect to the corrugated outer peripheral material 64, the stored items will not be damaged.

On the other hand, as the clamp member 1 moves, the packaging bag 61
The opening 62 of the rotary member 22 passes from the guide passage 16 of the conveyance device 11 through the entrance 21a of the binding passage 21.
When the tape 28 enters the recess 23, the tip 28a of the tape 28
As shown in FIG. 7, it is bent along the concave portion 23 of the rotating member 22 so as to sandwich the opening 62, and is then attached by sandwiching the opening 62 as the rotating member 22 rotates as the opening 62 moves. . At this time, the mouth part 62
is subjected to a resistance force, but the first feed claw 17 and the second feed claw
Since the feed pawl 19 cooperates to push the mouth 62, the mouth 62 is supported by both the feed pawls 17 and 19, and swinging of the mouth 62 is prevented. In this state, the mouth part 62 further moves and engages the engagement protrusion 3 of the cutting member 29.
When 1 is pressed, the cutter 30 moves toward the binding path 21 against the bias of the spring 33 and cuts the tip 28a of the attached tape 28 as shown in FIG. During this cutting, the first and second feed claws 17 and 19 are about to move away from the mouth portion 62.

After this binding, the opening 62 of the packaging bag 61 is guided from the end 21b of the binding passage 21 to the cutting passage 35.
Since the passage 35 is formed in an arc shape deviating from the moving direction A of the bag opening 62, the bag opening 62 is cut on the upper side of the tape 28 by the cutting edge 36a of the circular cutter 36 while being held by the cutting edge 36a. Ru. By this cutting, the packaging bag 61 (see Figure 8)
falls from the clamp member 1 and is discharged, leaving only the cutting ear 62a (see FIG. 9) on the clamp member 1. Blade tip 36a of circular cutter 36
Since it is sunk into one side edge 35a of the cutting passage 35, the passage 35 is completely blocked and the bag opening 62 can be reliably brought into contact with the cutting edge 36a.

When the guide plate 39 tilts downward from the highest position shown in FIG. 6 in synchronization with this binding and cutting,
The presser member 47 descends as it tilts, and the inner surfaces of both presser plates 49 come into contact with the cam roller 8 of the movable clamping plate 5 of the clamp member 1, as shown by imaginary lines in FIG. Due to this contact, the holding member 47 moves along the guide plate 39 as the clamp member 1 moves. Meanwhile, the opening 62 of the packaging bag 61 reaches the binding/cutting device 20, where it is bound with the tape 28 and cut by the cutter 30 as described above. Thereafter, when the guide plate 39 further tilts to the lowest position shown in FIG. 9, the presser member 47 descends while moving together with the clamp member 1 due to the tilting, and the presser member 49 sinks into the cam roller 8 of the movable clamping plate 5. Then, the movable arm 7 of the movable clamping plate 5 rotates in the direction of arrow B against the bias of the spring 10, and the clamping surface 3a of the fixed clamping plate 3 and the clamping arm 6 of the movable clamping plate 5 open from each other. .

In synchronization with this opening, air is ejected diagonally downward from the air outlet 51a of the air blowing pipe 51 and hits the inner surface of the cutting ear 62a of the bag opening 62, as shown in FIG. 53 outlet 54
will definitely fall. In synchronization with this fall, air is ejected from the ejection port 55a of the air ejection pipe 55 to the discharge port 54, and the cutting ear 62a is reliably delivered to the discharge pipe 53.

Thereafter, when the guide plate 39 tilts upward from the lowest position shown in FIG.
moves away from the cam roller 8 of the movable clamp plate 5, the movable arm 7 of the movable clamp plate 5 returns due to the bias of the spring 10, and the gap between the clamp surface 3a of the fixed clamp plate 3 and the clamp arm 6 of the movable clamp plate 5 is increased. Close again. Furthermore, as the guide plate 39 tilts upward, the presser member 47
moves toward the proximal end along the oblique guide plate 39 and abuts against the stopper 50 at the lowest position shown in FIG. In this state, the next clamp member 1 is moved below the holding member 47, and the packaging bag 61 and cutting ear 62a are moved under the same action as described above.
is discharged.

Note that a sponge may be placed in the space 67 of the main rotating belt 12.

Effects of the Invention As described in detail above, according to the present invention, the outer circumferential surface 12a of the rotary conveyance belt 12 is formed in a continuous wave shape along the rotational direction of the belt 12, so that the article 61 to be conveyed is The convex portion of the belt 12 can be pressed, and slippage between the outer circumferential surface 12a of the belt 12 and the article 12 can be prevented. Further, the wavy outer peripheral surface 12a is made of an elastic material, and a space 67 is formed inside the belt 12 that forms the wavy convex portion, so that the outer periphery of the belt 12 is formed on the side surface of the article 61. Surface 12a
When they come into contact with each other, the space 67 exhibits a cushioning effect and has the excellent effect of preventing the item 61 from being damaged.

[Brief explanation of the drawing]

FIG. 1 is a schematic front view showing a part of a bagging and packaging machine equipped with a rotating conveyor belt according to an embodiment of the present invention;
2 is a sectional view taken along the line X-X in FIG. 1, FIG. 3 is a partially enlarged plan view showing the main rotating belt in the conveyance device, FIG. The figures are a partial cross-sectional view taken along the Z-Z line in FIG. 3, FIG. 6 is a partial side view showing the grip release action of the packaging bag, FIG. 7 is a partial plan view showing the binding cutting device and the cut edge discharging device, and FIG. The figure is a partial perspective view showing the packaging bag cut after bundling, and FIG. 9 is a partial side view showing the discharge action of the cut ears. Clamp member...1, conveyance device...11, main rotating belt as a rotating conveyor belt...12, outer peripheral surface...12a, binding and cutting device...20, cutting passage...3
5, Side edge...35a, Circular cutter...36, Cutting edge...
36a, air blowout pipe...51, blowout port...51a, discharge pipe...53, discharge port...54, air blowout pipe...55,
Spout...55a, packaging bag...61 (item), mouth...
62, Cutting ear...62a, Base material...63, Peripheral material...6
4, concave portion...65, concave portion...65a, convex portion...65b,
Convex portion...66, concave portion...66a, convex portion...66b, space...67.

Claims (1)

[Scope of Claims] 1. In an endless rotary conveyance belt 12 that is provided along the conveyance direction of an article 61 to be conveyed and rotates with the outer peripheral surface 12a in contact with the side surface of the article 61, the outer periphery A rotary conveyor characterized in that the surface 12a is made of an elastic material and is formed into a continuous wave shape along the rotational direction of the belt 12, and a space 67 is formed inside the belt 12 which is a convex portion of the wave shape. belt. 2. The rotary conveyance according to claim 1, wherein a plurality of concavo-convex strips 65, 66 are alternately provided on the outer circumferential surface 12a in the continuous direction of the waveform so as to intersect with the rotational direction of the belt 12. belt. 3 The uneven strips 65, 66 have a plurality of uneven parts 65a, 65b, 66a, 66b along the extending direction.
The rotary conveyor belt according to claim 2, wherein the rotary conveyor belt is provided with: