JP2011225225A - Binding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem wherein a long stroke causes an operating delay of air and inhibits the speeding up of a binding machine, in which a bag holding claw clipping a bag opening is moved linearly by an air cylinder.SOLUTION: The binding machine includes a binding machine body 12 equipped with a pressure sensitive adhesive tape 6 for binding the bag opening of a packaging bag 4, and the bag holding claw 7 with a pair of freely openable/closable claws 16, 19 for narrowing the bag opening of the packaging bag 4 and the air cylinder 27 for moving to the binding machine body 12 side. The bag holding claw 7 narrows the bag opening of the packaging bag 4 and moves to the binding machine body 12 side while the binding machine body 12 moves in a direction opposite from the moving direction of the bag holding claw 7 so as to receive the bag opening.

Description

  The present invention relates to a binding machine that uses a packaging device to fill a packaging bag with an object to be packaged and heat-seal an opening, and then squeeze the upper portion of the packaging bag into a pleated shape and bind it with an adhesive tape or clip. .

  In the binding machine described in Patent Document 1, one claw that rotates about a main shaft that is pivotally supported and the other driven claw that rotates about a pin are connected via a link. The bag mouth of the packaging bag is narrowed down at the converging point by a recess formed at the tip facing portion of the bag holding claw, and the bag holding claw sandwiches the bag mouth on the bag mouth passage passage side of the binding machine body. Moving.

A winding gear and a pressing member that contacts the winding gear by a spring are arranged with the bag mouth passage as a boundary so as to close the bag mouth passage of the binding machine body. A pressure-sensitive adhesive tape is inserted between the winding gear and the pressing member, and when the narrowed bag mouth is moved toward the winding gear in contact with the pressure-sensitive adhesive tape, the bag mouth rotates the winding gear. However, when the bag mouth passage is moved against the urging force of the presser member, the tape is folded in two and entangled with the bag mouth.

Further, when the bag mouth entangled with the pressure-sensitive tape moves through the bag mouth passage, it strikes against the protrusion of the swing cutting portion. Cut the rear end of the pressure-sensitive adhesive tape entangled in two in the bag mouth with a blade.

JP 2003-72714 A JP 2003-335307 A

However, in the binding machine of Patent Document 1, the hook-shaped bag holding claw is moved to the binding machine body side with the bag mouth interposed therebetween, and the pressure-sensitive adhesive tape is entangled in two folds. In order to cut with a knives, it has to travel a considerable distance. The bag-like nail for holding the bag requires such a long moving distance because the rotary type packaging is performed when the packaging bag sandwiched between the pair of arms of the rotary type packaging device is delivered to the binding machine side. This is because the arm of the delivery device interposed between the device and the binding machine delivers the packaging bag while drawing an arc, so that it is necessary to prevent the binding machine body from entering the rotation range of the arm of the delivery device. .

However, since the bag holding claw is moved linearly by the air cylinder, an air operation delay occurs when the stroke is long. The delay in the air operation hindered the speeding up of the binding machine, and there was a problem that the production capacity was reduced without any improvement.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a binding machine that can solve the air operation delay of the air cylinder and can improve the production capacity.

Therefore, the present invention is equipped with a binding tool for binding the bag mouth of the packaging bag, and a pair of openable and closable means for narrowing down the bag mouth of the packaging bag, and a binding machine body provided with a mechanism for binding the binding tool to the bag mouth. And a bag holding claw having means for moving the claw with the bag mouth squeezed to the binding machine main body, and the bag holding claw squeezes the bag mouth of the packaging bag. While moving to the main body side, the binding machine main body moves in the direction opposite to the direction of movement of the bag holding claws so as to face the narrowed bag mouth.

  With the above-described configuration, the present invention moves the binding machine body in the direction opposite to the direction in which the bag holding claw sandwiches and moves the bag mouth, thus solving the air operation delay of the air cylinder and improving the production capacity. it can.

The schematic plan view which shows the arrangement | positioning relationship between the binding machine of this invention, and a rotary type packaging apparatus The top view which fractured | ruptured a part of binding machine of this invention Partial enlarged view of the binding machine of the present invention

1 is a schematic plan view showing the positional relationship between the binding machine of the present invention of FIG. 1 and the rotary type packaging apparatus, a plan view of a part of the binding machine of the present invention of FIG. 2, and the binding machine of the present invention of FIG. The binding machine according to the present invention will be described with reference to FIG.

In FIG. 1, the binding machine 3 of the present invention is arranged adjacent to the rotary type packaging apparatus 2, but the binding machine 3 of the present invention is not limited to such a rotary type packaging apparatus 2. Absent.

The rotary type packaging device 2 can perform some packaging operation every 45 degrees. In FIG. 1, after the bag mouth of the packaging bag 4 is sealed by the sealer 5, the rotary type packaging device is provided by a delivery device (not shown). 2 shows a state where the packaging bag 4 is delivered from the binding machine 3 to the binding machine 3, and then the bag mouth of the packaging bag 4 is squeezed into a pleat shape and bound with an adhesive tape or clip. Although the present embodiment will be described with respect to the binding machine 3 that binds the bag mouth using the pressure-sensitive adhesive tape 6, the present invention is not limited to the pressure-sensitive adhesive tape 6, and uses a clip-shaped binding tool. It may be a machine.

The binding machine 3 includes a bag-like bag holding claw 7 composed of a pair of claws for narrowing the bag mouth, a substantially trapezoidal frame 8, a pressure-sensitive adhesive tape reel 9, a winding gear 10, and the pressure-sensitive adhesive. It comprises a binding machine main body 12 equipped with a swinging cutting part 11 or the like for cutting the tape 6. A carry-out conveyor 13 is arranged in the lower part of the binding machine main body 12 in FIG.

Next, the bag holding claw 7 will be described with reference to FIGS. 1 and 2, but the bag holding claw 7 is basically the same as the conventional bag holding claw 7.

The bag holding claw 7 is supported by a substantially “<”-shaped substrate 14, one claw 16 that rotates about a main shaft 15 and the other driven claw that rotates about a sub-shaft 17. 19. The main shaft 15 of one claw 16 and the auxiliary shaft 17 of the other driven claw 19 are axially supported by the substrate 14 at a predetermined interval, and are fan-shaped gears provided on the rear end side of the respective claws 16 and 19. 20 is engaged, and an air cylinder 22 is connected between the rear end of one claw 16 and the projection 21 of the substrate 14, and the expansion and contraction of the air cylinder 22 causes the one claw 16 to be centered on the main shaft 15. When it rotates, the other driven claw 19 rotates via the sector gear 20, and the bag mouth of the packaging bag 4 can be narrowed by the both claws 16, 19, or the bound packaging bag 4 can be released.

The bag mouth of the packaging bag is narrowed narrowly at the converging point 24 by the recess 23 formed at the tip-facing portion of the bag-like bag holding claw 7, and the bag holding claw 7 pinches the bag mouth to bind the binding machine. The main body 12 moves toward the bag opening passage 26 side. The bag holding claw 7 is moved linearly by a rodless type air cylinder 27, but the substrate 14 is fixed to a sliding block 28 of the air cylinder 27, and a guide rod 29 arranged in parallel with the air cylinder 27. It is supported by.

In FIG. 1, the state before the bag holding claw 7 is opened and the packaging bag 4 delivered from the rotary type packaging device 2 is narrowed, the state 12 that is narrowed down at the collecting point 24, and the binding machine main body. 3 shows the bag holding claw 7 in the state immediately before dropping the packaging bag 4 on the carry-out conveyor 13, and in FIG. 2, the bag holding claw 7 is opened and the packaging bag 4 delivered from the rotary type packaging device 2 is shown. Two types of bag holding claws are shown in a state before narrowing down and a state just before the packaging bag 4 is dropped on the carry-out conveyor 13 after being bound by the binding machine body 12.

In the main body 12 of the binding machine, a bag mouth passage 26 is formed along one side edge of the substantially trapezoidal frame 8. The bag mouth passage 26 is composed of a slit 30 opened to the outside and a substantially elliptical cutout 31 connected to the slit 30. The trace of movement of the slit 30 in the bag mouth passage 26 and the bag The movement trace of the bag mouth when the holding claw 7 moves while sandwiching the bag mouth is located on the same line.

The winding gear 10 is pivotally supported at the inlet of the bag mouth passage 26 of the frame 8 so as to be freely rotatable. The teeth of the winding gear 10 are positioned in the bag mouth passage 26, and when the narrowed bag mouth passes through the slit 30, the teeth rotate so that the bag mouth passes the bag mouth passage. 26 is not obstructed.

A pressing member 32 is urged by and abutted against the winding gear 10 by a spring 33 across the bag mouth passage 26. An arc-shaped portion 34 having the same radius of curvature as the outer peripheral edge of the winding gear 10 is cut into the pressing member 32, and the pressure-sensitive adhesive tape 6 is sandwiched between the winding gear 10 and the arc-shaped portion 34 and pressed by a spring 33. Attached.

Further, a swinging cutting portion 11 for cutting the pressure-sensitive adhesive tape 6 is provided at an intermediate position of the bag mouth passage 26. The swing cutting portion 11 swings around the pin 35 and is normally urged by a spring 36 so that the protrusion 39 closes the bag mouth passage passage 26, but the narrowly narrowed bag mouth is the bag. When passing through the mouth passage 26, the rear end portion of the pressure-sensitive adhesive tape 6 that abuts against the protrusion and rotates the blade 37 of the swing cutting portion 11 toward the bag mouth passage 26 to wind around the bag mouth. Disconnect.

A reel 9 for pressure-sensitive adhesive tape is attached to a corner portion symmetrical to the corner portion of the frame 8 provided with the winding gear 10. The pressure-sensitive adhesive tape 6 drawn out from the reel 9 is heated while being in contact with a heater 38 provided in the middle while being guided by a roller 40, and is then sandwiched between the winding gear 10 and the pressing member 32 as described above. ing.

The binding machine main body 12 of the present invention moves in a direction opposite to the direction in which the bag holding claw 7 moves while pinching the bag mouth, whereas the binding machine main body of the conventional binding machine is fixed. That is, the bag holding claw 7 squeezes the bag mouth and moves to the bag mouth passage passage side, but the binding machine body 12 simultaneously moves in the opposite direction to the bag mouth so as to meet the narrowed bag mouth. To do.

In the conventional binding machine, for example, by the time the binding is completed, the nail for holding the bag has to move 300 mm while sandwiching the packaging bag at the collecting point. If moved, the bag holding claw 7 has only to be moved 200 mm, and the bag holding claw 7 can be moved 100 mm shorter, solving the air delay of the air cylinder 27 and increasing the bundling speed. Production capacity is also improved.

The relative movement speed between the bag holding claw 7 and the binding machine body 12 is set so that the movement speed of the bag holding claw 7 is faster than the movement speed of the binding machine body 12. In this embodiment, the moving speed of the bag holding claw 7 is set to about twice the moving speed of the binding machine body 12.

FIG. 3 shows a mechanism for reciprocating the binding machine body 25 as described above. One end of an L-shaped link 41 is pivotally supported on the binding machine body 25, and the other end is connected to a triangular cam arm 43 via a rod 42, and the cam arm 43 and the disk-shaped groove cam 44 are connected to each other. It is pivotally supported. A motor torque (not shown) causes the binding machine body 25 to reciprocate linearly through the above-described configuration via the speed reducer 45.

However, in order to reciprocate the binding machine main body 25 in a straight line, the configuration is not limited to the above-described configuration, but a reciprocating configuration using a rodless type air cylinder, a rack and a pinion or a linear motor, etc. However, the means is not limited.

  INDUSTRIAL APPLICATION This invention is useful for the binding machine which squeezes the upper part of the packaging bag which sealed the bag mouth in a pleat shape, and binds it with an adhesive tape or a clip.

2 Rotary type packaging device 3 Binding machine 4 Packaging bag 6 Pressure-sensitive adhesive tape (binding tool)
7 Bag holding claw 8 Frame 10 Winding gear 11 Oscillating cutting part 12 Bundling machine body 14 Substrate 16 One claw 19 The other driven claw 20 Fan gear 22 Air cylinder 23 Recessed part 24 Concentration point 26 Bag mouth passage passage 27 Air Cylinder (means for moving)
30 Slit 31 Notch 32 Presser member 38 Heater 41 Link 42 Rod 43 Cam arm 44 Groove cam

Claims (4)

A bundling tool that binds the bag mouth of the packaging bag is equipped, and a bundling machine body with a mechanism for bundling the binding tool to the bag mouth, and a pair of openable / closable claws that narrow down the bag mouth of the packaging bag. A bag holding claw having means for moving the claw that narrows down the bag mouth to the bundling machine body side,
The bag holding claw squeezes the bag mouth of the packaging bag and moves to the binding machine main body side, and the binding machine main body is opposite to the direction of movement of the bag holding claw so as to go to the narrowed bag mouth. A binding machine characterized by moving in the direction. The main body of the binding machine is formed with a bag mouth passage and an adhesive tape for binding the bag mouth of the packaging bag, and the adhesive tape is attached to the narrowed bag mouth that passes through the bag mouth passage. The binding machine according to claim 1, further comprising a winding gear and a pressing member that are entangled with each other. The binding machine according to claim 1 or 2, wherein the binding machine body reciprocates by a link mechanism. The binding according to claim 1, wherein a movement speed at which the bag holding claw narrows the bag mouth of the packaging bag and moves toward the binding machine main body is set faster than a movement speed of the binding machine main body that goes to the bag mouth. Machine.

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