JPH0744572Y2 - Packaging bag binding device - Google Patents

Description

[Detailed Description of the Invention] <Industrial field of application> The present invention relates to a packaging bag binding device for binding the upper opening of a packaging bag with an adhesive tape, more specifically, a flat top opening of a packaging bag filled with an object to be packaged. A gripping mechanism for holding the claw is provided so as to be openable and closable, and an opening and closing mechanism for squeezing the upper part of the sandwiched packaging bag in a fan shape in a direction orthogonal to the cleaving direction is provided under the crawling mechanism and the rotary gear is also provided. The present invention relates to a packaging bag binding device provided with a binding passage in which is rotatably provided, and provided with a tape applying mechanism for winding and cutting an adhesive tape around a focusing portion of a packaging bag that has entered the passage.

<Prior Art> Conventionally, as a packaging bag binding device of this type, for example, SAIKAI 59-1
As disclosed in Japanese Patent No. 38506, a holding mechanism holds an upper opening of a packaging bag in a flat shape, and the holding mechanism is horizontally moved toward a binding passage of a fixed tape applying mechanism, thereby operating a squeezing mechanism. Then, the upper part of the bag is converged into a fan shape, and then is introduced into the bundling passage, and the converging part is fitted into one of a plurality of engaging recesses provided around the outer periphery of the rotary gear and is rotated at the same time. There is a type in which an adhesive tape sandwiched between a gear and a pressing piece is wrapped around the outer circumference of a focusing section, and the focusing section abuts against a rotatable engaging projection on the inner side thereof to cut the tape.

<Problems to be solved by the invention> However, in such a conventional packaging bag binding device, since the rotary gear is always mounted in a rotation-free state, its inertia acts after passing through the focusing part. The rotation gear re-rotates due to easy vibration and the standby angle of the gear easily rotates,
When the protruding angle of the teeth waiting at the entrance of the bundling passage approaches the approaching angle of the converging part, the converging part that has entered comes into contact with the tips of the teeth and the rotating gear cannot rotate, and the tape cannot be wound. is there.

Therefore, the positioning guide is detachably engaged with the engaging recess, and the positioning guide is biased in the engaging direction by an elastic material such as a spring, so that the waiting angle of the engaging recess opening at the entrance of the binding passage is adjusted. It is conceivable that the focusing part is always maintained in the positional relationship where the focusing part is most easily fitted, but in this case, the focusing part that has entered must rotate the rotary gear while releasing the engagement with the positioning guide. Due to the resistance, the bundling part is more likely to tilt than the holding position, and in this tilted position the adhesive tape is bound in a non-parallel manner with the bottom surface of the bag, and the upper part of the bag is not formed into a symmetrical fan shape, which makes it unattractive. There is a problem that the product value is reduced from the point of view of design.

In view of such conventional circumstances, the present invention has an object to set the standby angle to the angular position where the focusing portion is most easily fitted without the rotation resistance of the rotary gear when the focusing portion enters.

<Means for Solving the Problems> The technical means taken by the present invention to solve the above-mentioned problems are as follows: A positioning guide that is detachably engaged with the engaging concave portion is provided so as to be movable in and out of contact, and this positioning guide is engaged and disengaged at a timing different from the entrance timing of the focusing portion into the focusing passage. .

<Operation> According to the above technical means of the present invention, the positioning guide is engaged with the engaging recess after passing through the converging part, so that the waiting angle of the engaging concavity opening at the entrance of the binding passage is the most converging part. The positioning guide is disengaged from the engagement concave portion before the next focusing portion enters, and the rotary gear stands by in a rotation-free state.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

In this embodiment, as shown in FIG. 1, the tape applying mechanism (3) of the packaging bag binding device (A) is rotated in the horizontal direction with respect to the bundling portion (a ₂ ) of the packaging bag (a), thereby The bundling portion (a ₂ ) is introduced into the bundling passage (3b), and the packaging bag bundling device (A) is arranged below the vertical bag-making filling and packaging device (B) as shown in FIG. Then, the case where the upper end of the packaging bag (a) is horizontally sealed is shown.

The packaging bag binding device (A) includes a holding mechanism (1), a squeezing mechanism (2), a tape applying mechanism (3), and an air bleeding mechanism (4).

Clamping mechanism (1) is bag-making filling and packaging apparatus horizontal sealing machine (B) to (B ₁₎ a pair of clamping pieces below the (B ₁₎ (1a) (1a), the packaged articles (b) are filled The packaging bags (a) are arranged so as to open and close in opposition to the upper opening (a ₁ ) of the packaging bag (a), and these holding pieces (1) are set at substantially the same time as the horizontal sealing machines (B ₁ ) (B ₁ ) are closed.
a) (By 1a) is closing, the allowed to pinching an upper opening (a ₁₎ in accordance with the lateral sealing direction parallel flat packaging bag (a), described later choke elements (2a) (2a) At the same time as the closing operation of, the opening operation is started.

In the case of the present embodiment, each holding piece (1) is attached to a pair of rotating shafts (1b) (1b) which are erected parallel to the vertical direction with the packaging bag (a) sandwiched therebetween.
a) The base ends of (1a) are fixed horizontally, respectively, and the rotary shafts (1b) (1b) are simultaneously driven to rotate in the same direction, so that the two holding pieces (1a) (1a) open horizontally. As a result, the inner surfaces (1a ₁ ) (1a ₁ ) of the respective holding members are configured to be slid in a straight line to be closed, and the holding surface of each holding piece (1a) (1a) has a packing bag (a). Protrusions (1a ₂ ) (1a ₂ ) that firmly hold the central portion in the width direction are partially projected.

The diaphragm mechanism (2) holds the pair of diaphragm pieces (2a) (2a) below the both holding pieces (1a) (1a) in the direction of holding them, that is, at right angles to the closing direction of both the holding pieces (1a) (1a). The wrapping bag (2a) (2a) is closed by a predetermined time after the closing movement of both the holding pieces (1a) (1a) is completed. The upper part of a) is fan-shaped in a direction orthogonal to the holding direction to form a bundling part (a ₂ ) in the bag (a), and the bag is opened at the same time when the tape cutting mechanism (3) described later completes cutting the tape. Let it start.

In the case of the present embodiment, a pair of rotating shafts (2b) and (2b) that are vertically arranged close to each other in the center of one side of the packaging bag (a) are provided with
The base ends of the diaphragm pieces (2a) (2a) are fixed horizontally, and the rotary shafts (2b) (2b) are simultaneously driven to rotate in opposite directions so that both diaphragm pieces (2a) (2a) are horizontal. V-shaped groove (2a ₁ ) (2a ₁ ) recessed inside each tip by opening in a circular shape
And a closing portion (2a) (2a) in which at least the tip end side of the throttle pieces (2a) (2a), the tape attaching mechanism (3) horizontally moves in and out loosely.
a ₂ ) and (2a ₂ ) are respectively recessed.

The tape applying mechanism (3) rotatably supports the reel (3a) on which the adhesive tape (C) is wound, and inserts the tip of the tape (c) into the entrance of the binding passage (3b) recessed in the outer periphery. When the gripping rotary gear (3c) and the holding piece (3d) face each other and are rotatably attached to each other, and when the bundling portion (a ₂ ) of the packaging bag (a) passes through the inlet of the bundling passage (3b). Adhesive tape (c) on
And a cutting piece (3e) having a cutter (3e ₁ ) and an engaging protrusion (3e ₂ ) formed in a substantially V shape on the inner side of the outer peripheral surface of the cutting piece. The converging part (a ₂ ) that has passed through hits the engaging protrusion (3e ₂ )
The tape (c) has a conventionally well-known structure which is cut and guided as it is to the discharge port (3b ₁ ) of the bundling passage (3b).

The tape applying mechanism (3) is provided with a drive shaft (3f) extending in the vertical direction, which is supported rotatably in the horizontal direction about the drive shaft (3f) and a binding path (3).
b) rotation track (3b '), the closing position of the holding pieces (1a) (1a) and the closing position of the diaphragm pieces (2a) (2a), that is, the focusing position (P) of the packaging bag (a). Are aligned with each other in the vertical direction, and the bundling passage (3b) is rotationally moved by the rotation of the drive shaft (3f), and the focusing position (P) is almost at the same time when the closing movement of the aperture pieces (2a) (2a) is completed. Of the packaging bag (a), the focusing portion (a ₂ ) of the packaging bag (a) enters the binding path (3b).

In the case of this embodiment, the drive shaft (3f) is continuously rotated.

A plurality of engaging recesses (3c ₁ ) having a diameter slightly larger than the outer diameter of the bundling portion (a ₂ ) of the packaging bag (a) are provided around the outer periphery of the rotating gear (3c). ₁ ) ... and a positioning guide (3c) that detachably engages with the engaging recess (3c ₁ ).
g) is arranged so as to be movable in and out of contact, and the positioning guide (3g) is disengaged and driven by being shifted from the entrance timing of the focusing portion (a ₂ ) into the binding passage (3b).

In the case of the present embodiment, the intermediate portion of the positioning guide (3g) formed in a substantially V-shaped plane is rotatably attached horizontally to the substrate (3 ') of the tape attaching mechanism (3), and one end thereof is attached. The engaging roller (3g ₁ ) axially attached to the one end is detachably engaged with one of the engaging recesses (3c ₁ ), and the other end driven roller (3g ₂ ) is projected below the substrate (3 ′). The rollers (3g ₁ ) (3g ₂ ) and the elastic material (3g ₁ )
g ₃ ) urges the engaging concave portion (3c ₁ ) and the annular fixed cam (3h) provided below the substrate (3 ′) in the engaging direction, respectively.

The fixed cam (3h) is arranged separately from the outer periphery of the drive shaft (3f), and the driven roller (3g ₂ ) is brought into contact with the outer peripheral surface of the fixed cam (3h), and the binding passage (3b) is rotated along with the rotation of the tape applying mechanism (3). ) Before reaching the focusing position (P) of the packaging bag (a), the driven roller (3g ₂ ) is moved inward so that the engaging roller (3g ₁ ) is engaged with the engaging recess (3c ₁ ). Of the engaging recesses (3c ₁ ) that open to the entrance of the bundling passage (3b) so that the converging portion (a ₂ ) is most likely to be fitted, and (3b) Immediately before the entrance reaches the focusing position (P), the driven roller (3g ₂ ) is moved outward so that the engaging roller (3g ₁ ) is disengaged from one of the engaging concave portions (3c ₁ ). Therefore, the rotation of the rotary gear (3c) is prevented from being resisted.

The air bleeding mechanism (4) has a pair of air bleeding pieces (4a) (4a) below the squeezing mechanism (2) and the tape applying mechanism (3).
Are arranged so that they can be opened and closed, respectively, slightly above the article to be packaged (b) filled in the packaging bag (a) or facing the article to be packaged (b), and the horizontal sealing machine (B ₁ ) (B ₁ ) and the holding pieces (1a) (1a) before the closing movement of these air bleeding pieces (4a)
The air that has entered the bag (a) due to the closing of (4a) is pushed out of the bag (a) through the upper opening (a ₁ ), and immediately before the closing movement of the throttle pieces (2a) (2a). by slightly wide opening motion, to allow air movement of the bag (a) focusing unit to allow upward movement of the lower (a ₂₎ focusing unit while easily formed from (a ₂₎ to the bag (a) lower , Further diaphragm piece (2a)
Start the opening operation almost at the same time as the closing operation of (2a).

In the case of the present embodiment, each air bleeding piece (4a) is placed on the support rods (4b) (4b) that are placed horizontally in parallel with the packaging bag (a) sandwiched between them.
The base end of (4a) is supported so as to be horizontally movable, and these air bleeding pieces (4a) and (4a) are simultaneously driven in opposite directions to move laterally, so that the inner surfaces (4a ₁ ) (4a ₁ ) ) Is configured so that it will slide in a straight line and close.

On the other hand, in the vertical bag-making filling and packaging apparatus (B), the packaging film is intermittently fed out, wrapped around the bag-making cylinder (B ₂ ) to form a tube, and hung down, and then the horizontal sealing machine (B ₁ ) ( The tubular packaging film is laterally sealed in the width direction by the closing movement of B ₁ ) to form a packaging bag (a), and the bag-making cylinder (B ₂ ) is passed through the bag (a) to be packaged ( It has a conventionally well-known structure for filling b), the upper opening (a ₁ ) of the packaging bag (a) which is filled with the object to be packaged (b) and is fed downward, and an empty packaging bag which is continuous above it. At the same time, the lower opening of (a) is horizontally sealed, and both bags (a) and (a) are separated by a cutter (B ₃ ), and a horizontal sealing machine (B ₁ ) (B ₁ ) is used.
Close the pair of package receivers (B ₄ ) (B ₄ ) placed above the horizontal sealer (B ₁ ) (B ₁ ) almost at the same time to open the lower part of the empty packaging bag (a). By starting to fill the object to be packaged (b) after it is caught, the lateral seal at the lower end of the bag (a) is prevented from peeling off due to the weight of the object to be packaged (b).

Next, the operation of the packaging bag binding device (A) will be described.

When the packaging bag (a) is unrolled downward after the object to be packaged (b) is filled, the air bleeding pieces (4a) (4a) are first closed to move the air in the bag (a) to the upper opening (a ₁ ), And the holding pieces (1a) (1a) are continuously attached to the horizontal sealing machine (B ₁ ) (B ₁ ).
And at the same time, the upper opening (a ₁ ) is flattened and held.

After that, the air bleeding pieces (4a) (4a) open slightly, and then the squeezing pieces (2a) (2a) start to close to converge the upper part of the bag (a) into a fan shape to form a focusing part (a ₂ ). Is formed.

Almost at the same time when the closing movement of the throttle pieces (2a) (2a) is completed, the holding pieces (1a) (1a) and the air bleeding pieces (4a) (4a) start to open, and they are bound by the rotation of the drive shaft (3f). The passage (3b) approaches above the focusing position (P).

The engaging roller (3g ₁ ) of the positioning guide (3g) is engaged with the rotary gear (3c) before the entrance of the bundling passage (3b) reaches the converging position (P) of the packaging bag (a). Recess (3c ₁ )
By engaging with one of the ..., Leading the angular position of the engaging recess (3c ₁ ) opening at the entrance of the passage (3b) to the angular position where the focusing part (a ₂ ) is most easily fitted, and further focusing position just before reaching the (P), eliminating the rotational resistance of the rotary gear (3c) positioning guide (3 g) is engaging recess (3c ₁₎ ... one disengaged from the.

When the bundling passage (3b) passes above the bundling position (P), the bundling portion (a ₂ ) of the bag (a) enters the bundling passage (3b) to wind and cut the adhesive tape (c). .

At this point, the holding pieces (1a) (1a) and the air bleeding piece (4a) have already been fully opened, and the upper end of the bound packaging bag (a) has been cut off from the empty packaging bag (a). Exit (3b
₁ ) Drop from.

In the case of this embodiment, the bundled packaging bag (a) that has fallen is discharged from the dropping position to the subsequent process by the discharge pusher (5). After that, the above-described operation is repeated.

In the embodiment shown above, the focusing portion (a ₂ ) of the packaging bag (a) is driven to rotate in the horizontal direction with respect to the focusing portion (a ₂ ) of the packaging bag (a) so that the focusing portion (a ₂ ) Is shown, but the present invention is not limited to this, and the tape applying mechanism (3) is linearly moved back and forth, and the taper mechanism (3) is fixed to the circumferential side (a ₂ ) side. The converging part (a ₂ ) may be moved in any manner such as moving the focusing part (a ₂ ).

Furthermore, the holding mechanism (1), the squeezing mechanism (2), the tape applying mechanism (3), and the air bleeding mechanism (4) are not limited to the above-mentioned configurations, and various modifications are possible if the same operation is performed. Is.

<Effect of Device> Since the device of the present invention has the above-described configuration, it has the following advantages.

By engaging the positioning guide with the engaging recess after passing through the converging unit, the standby angle of the engaging recess opening at the entrance of the binding passage is guided to the positional relationship where the converging unit is most easily fitted, and the next converging unit enters. Since the positioning guide is disengaged from the engaging recess and the rotary gear stands by in a rotation-free state, there is no rotational resistance of the rotary gear when the focusing part enters, and the standby angle is the angle position where the focusing part is most easily fitted. Can be

Therefore, as compared with the conventional one in which the rotary gear is always rotatably attached to the free state, the rotating gear re-rotates after passing through the converging portion and the converging portion that has entered does not hit the tip of the tooth, thus preventing tape winding failure. Compared to the one that can completely prevent it, and the elastic material keeps the standby angle of the rotating gear at the angle where the bundling part can be fitted most easily at all times, the peripheral side part is not inclined and the adhesive tape can be bound in parallel with the bottom surface of the bag and the bag The upper part of the shape becomes a symmetrical fan shape and looks good, and the product value can be improved in terms of design.

[Brief description of drawings]

FIG. 1 is a cross-sectional plan view of a packaging bag binding device showing an embodiment of the present invention in a state before binding, and FIG. 2 is a longitudinal side view of the same.
FIG. 3 is a cross-sectional plan view showing a partially enlarged state at the time of binding. a: packaging bag, a ₁ upper opening a ₂ bundling part, b packaged item c adhesive tape, 1 gripping mechanism 2 drawing mechanism, 3 tape attaching mechanism 3 b … Bundling passage, 3c …… Rotating gear 3c ₁ …… Engagement recess, 3g …… Positioning guide

Claims (1)

[Scope of utility model registration request] 1. A holding mechanism is provided for holding an upper opening of a packaging bag filled with an object to be packaged in a flat shape, and an upper portion of the held packaging bag is below the holding mechanism in a direction orthogonal to the holding direction. A tape applying mechanism is provided in which a squeezing mechanism for converging in a fan shape is provided, a binding passage in which a rotary gear is rotatably arranged is provided in a concave shape, and an adhesive tape is wound around the focusing portion of a packaging bag that has entered the passage and cut. In the provided packaging bag binding device, a positioning guide that is detachably engaged with the engaging recess is moved closer to and away from the engaging recess having a diameter larger than that of the converging portion provided around the rotary gear. A packaging bag tying device, wherein the positioning guide is freely provided, and is engaged / disengaged with the positioning guide being displaced from the timing at which the focusing portion enters the binding passage.