JPH0343327A - Bag-supporting device in bag-mouth binder - Google Patents

Abstract

PURPOSE:To spot-supporte a bag at the time of narrowing the bag mouth by causing a push-pin with a small tip area to face a movable pawl plate and by separating the movable pawl plate slightly from a pawl-receiving plate directly before a pair of holding arms narrow the bag mouth. CONSTITUTION:In a bag-mouth binder provided with a pair of holding arms 27, 28 for narrowing the bag mouth in the intermediate part of a carrier track, a rubber push-pin 59 with a small tip area is fixed in front of a spring-receiving plate 56 and is caused to protrude forward of the central notch 60 of a pawl- backing plate 36. When an arm 21 approaches the pair of holding arms 27, 28 and a roller 39 comes in contact with an adjusting cam 66, the roller 39 is pushed slightly and a movable pawl plate 35 is separated slightly from the pawl-receiving plate 36. In this case, the push-pin 59 continues to be in contact with the movable pawl plate 35 by the reaction force of a spring 58 so that a packed product 100' is held in a spot-supporting state by the movable pawl plate 35 and push-pin 59.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention provides a rotary bagging and packaging machine in which a packaged product constituted by a rotary bagging and packaging machine is held between a pair of support bars, and is received from the bagging and packaging machine. The present invention relates to a bag opening tying device for narrowing the bag opening of the packaged product during transportation and tying it with a wire or the like, and to a new improvement of the device and a support method using the support bar for holding the packaged product.

(Prior Art) Japanese Patent Application No. 62-207143 and Japanese Patent Application No. 62-281585, which are earlier applications of this application. Each publication of Japanese Patent Application No. 62-331451 describes a pair of front and rear support bars (1) as shown in Figure 11.
At (2), the bag (4) containing the item to be packaged (3) is transported by clamping the bag opening, and during the transportation, the clamping arms (5) and (8) are approached from the left and right as shown by the arrows. , 12th
The support bar (1) is attached to the support bar (1) by the clamping arms (5) and (6) as shown in the figure.
Squeeze the bag (4) thinly under (2), and attach a binding material (7) such as tape or wire to the narrowly squeezed part as shown in Figure 13.
) is disclosed.

(Problems to be Solved by the Invention) In the above-mentioned binding device, the support bars (1) and (2) have a certain length and are designed to hold the bags widely in order to transport the bags in a stable state. As shown in Fig. 11, when the bag (4) is widely held between the support bars (1) and (2), the pair of holding arms (5) and (6) are brought closer to the bag (4). Since the entire bag (4) is lifted up by the amount that the bag opening is squeezed, there is a drawback that if the lifting of the bag (4) is anticipated in advance, only a small amount of the packaged items can be accommodated in proportion to the internal volume of the bag. Ta. In other words, a bag that is large in proportion to the volume of the packaged item is required, and the bag is wasted accordingly. If the opening of the bag is spot-pinched, the edges on both sides of the bag will easily gather toward the center of the bag when the opening is squeezed, so the bag will hardly lift up, and there will be no wasted parts of the bag. However, this clamping method has the disadvantage that the bag shakes during transportation and lacks stability.

In addition, when the bag opening is narrowed as shown in Figure 13, the upper edge (4a) of the bag usually becomes a beautiful fan-shaped bag. The problem was that the upper edge had an unnatural straight shape.

In view of the above-mentioned points, the present invention provides a support device which can hold a bag widely and transport it stably, and which can be switched to spot-support the bag when the bag mouth is narrowly squeezed by a gripping arm.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides a first claim in which a clamping force is applied to a pair of pawl plates provided on the periphery of the rotor so as to be able to open and close freely, thereby filling the packaged items. The upper edge of the bag is held between the two claw plates, and the bag suspended from the two claw plates is transported by the rotation of the rotor, and in the middle of the transportation path, a counter is provided to narrow the opening of the bag. In a bag opening binding machine equipped with a clamping arm, a bushing pin with a small tip area can be freely stroked from the direction of the nail plate on one side toward the center of the nail plate on the other side, and the tip of the bushing pin is engages its own pressure biasing element to the bushing pin so that it is always in pressure contact with the opposing claw, while the bag is held by the pair of claws at the position where the pair of clamping arms are installed. It is constructed by providing an element to separate it slightly.

Further, in the second claim, a clamping force is applied to a pair of claw plates provided on the periphery of the rotor so as to be able to open and close freely, and the upper edge of the bag filled with the object to be packaged is clamped between the two claw plates, and the rotor is rotated. In a bag opening tying machine that transports a bag suspended from both claw plates, and is provided with a pair of clamping arms in the middle of the transport path to narrow the opening of the bag, the one claw plate A bushing pin with a small tip area is made to face toward the center of the claw plate on the other side in a free stroke, while the rear end of the bushing pin comes into contact with the position where the pair of clamping arms are installed, and the bushing pin In addition, a clamping force is provided to resist the clamping force and to slightly open the gap between the pair of claw plates.

(Function) The bag containing the item to be packaged is held between a pair of claw plates, that is, a claw plate and a movable claw plate, but since the claw plate and the movable claw plate have a certain width, the bag is held horizontally. It is transported relatively stably without shaking. In this case, the claw receiver has a bushing pin with a small tip area facing the intermediate portion of the plate. In the first aspect of the present invention, the bag is squeezed thinly by a pair of clamping arms during transportation, and the movable claw plate is separated from the claw plate within a range where the contact between the bushing pin and the movable claw plate is not released, and the bag is held in place by the spring. Point support is provided by the pushpin and the movable claw plate by force, while
In the second aspect, the bushing pin is pushed out by the fixed cam and supported at a point by the bushing pin and the movable claw plate. Therefore, a gap is created between the plate of the claw holder and the movable claw plate, and the opening of the bag can be narrowed by the pair of clamping arms without lifting the bag upward.

(Example) In Fig. 1, the bagging and packaging machine (10) has a large number of pairs of clamp arms (12) (12)... arranged at equal intervals around the circumference of a circular rotor (11). , the packaging bag (100) can be held between the clips (13) (13) at the tips of each clamp arm. The rotor (11) rotates intermittently in the direction of the arrow around the shaft (14), and in section A, the packaging bag (100) is supported by a vacuum cup (i5) and attached to the clip (13). When fed, the clip grips the packaging bag and rotates in the direction of the arrow, opens the mouth of the packaging bag at each section in the middle of its rotational path, fills it with the item to be packaged or seasoning liquid, and then seals a pair of bags at the Y section. Such an arrangement is generally known, with a bar for thermally welding the bag opening and two sections for releasing the packaged product (100°) from the pair of clamping arms (12) (12).

On the other hand, the binding device has four arms (2
1) (21) (21) (21) protrudes radially, but in detail, as shown in Figure 2, the machine base (24
) The cylindrical main shaft (2
6〉 is rotatably supported, and the six arms (21) are supported on the upper surface of a disk (20) fixed to the upper end of the main shaft (26), and these six arms have a plate with a claw receiver at the tip. (36), and the claw receiver is provided with a movable claw plate (36) so as to face the plate.
5) is pivotally supported via a pin (30>), and a rod (32) having one end connected to the operating lever (31) of the movable claw plate is arranged along the arm (21) and is wound around the rod. The tension of the coil spring (33) is applied to the head (84) at the other end of the rod, and the tension of the spring (33) causes the movable claw plate (35) to come into pressure contact with the claw plate (36), thereby releasing the packaged product. (100°) is always energized to be clamped.

A driving shaft (42) connected to the prime mover via a chain wheel (41) inside the machine, and the main Idl (2B)
) are engaged with each other via a Geneva stop (44), and the main shaft (26) is intermittently rotated by 90 degrees by the action of the Geneva stop (44). Therefore, in Figure 1, the four arms (21) (21) (21) (21
) is intermittently rotated in the direction of the arrow at the same pitch as the spacing between the six arms attached by the disk (20).

On the other hand, attach the core frame (37)', whose lower end is fixed to the machine base, to the main shaft (2).
An auxiliary cam (40> is installed in the hollow of 6> and fixed to the upper end of the core frame (37), and a circular cam plate (38>) is attached to the core frame (37) below the auxiliary cam. The rollers (39) are rotatably supported and provided at the other ends of the four rods.
39) (39) (39) is arranged on the circumferential surface of the cam plate (38). Further, a pin (50) is installed upward from the cam plate (38), and the pin (50) is attached to the auxiliary cam (40).
The cam plate (38) is engaged in an arcuate groove (51) formed on the lower surface of the cam plate (38), and is configured to freely rotate within the length of the cam plate (51). Furthermore, as shown in FIG. 7, the cam plate (38) is moved toward the moving direction of the roller (39).
A part of the peripheral surface of the is bulged out with a gentle slope, and this bulged part (52
As shown in FIG.
It is positioned so that a) coincides with the stop position of the roller (39). Therefore, when the roller (39) moves in the direction of the arrow as shown in FIG. 7, the roller (39) is pushed out in the centrifugal direction by the bulge (52) of the cam plate, and as shown in ) The movable claw plate (35) is opened by pushing out the rod (32〉).One roller (39)
Since the stop position of the arm is aligned with the end end (52a) of the bulge, when the roller (39) stops, the pressure of the spring (33) inside the arm is applied to the cam via the roller (39). Since it acts on the rounded portion of the end end (52a) of the plate, the cam if (38) reverses as shown by the arrow shown by the imaginary line in FIG. 8, causing the roller (39) to fall to the circumferential surface of the cam plate. As a result, the movable claw plate (35〉) at the tip closes, and the claw holder clamps the upper edge of the packaged product (100°) with the plate (36).In the above case, as shown in Fig. 8, the rear roller (
39) is placed on top of the auxiliary cam (40) so that the cam plate (38) is easily reversed, and when the roller 39) begins to move again, the spring (33) is moved through the roller (39).
) acts on the bulge part <52) of the cam plate, so the cam plate (38)? It rotates counterclockwise by a range of 1 (51) and returns to the home position. and packaging products (tooo)
is supported by the arm (21) and carried by the rotation of the disc (20), and at the first stop position, the pair of seal bars (22)
(23) heat-seals the part of the bag to be bound, and at the next stop position, a pair of clamping arms (27) and (28) approach from both sides and squeeze the opening of the bag.
27) Continuously load one of the binding metal fittings into the bag opening and tighten it with both clamping arms (27) and (28).

As shown in Figures 3 and 4, the arms (2
1), there is a bracket (54) on the arm (21).
A block (55) fixed to the arm (21) is located on the back side of the plate (36), and the block (55) and the claw plate are attached to the plate (3B). A plate (56〉) is placed between the spring holders, and a block (55) is placed between the spring holders.
A spring (58) provided inside the hole (57) drilled in the
), the spring receiver urges the plate (56) in the direction of the plate (36), and the spring receiver also has a rubber bushing pin (59) with a small tip area on the front of the plate (56).
At the same time, the bushing pin (59) is made to protrude forward from the notch (60) in the center of the plate (36). On the other hand, in Fig. 1, a pair of clamping arms (27
) Adjust the position of the adjustment cam (66), which has a bulge (65) at its tip, freely with screws (87) with respect to the auxiliary cam (40>) so that it faces the position where (28) exists. It is fixed in a fixed state.

As shown in Figure 4, normally the movable claw plate (35) has a spring (5
8) Push down the bushing pin (59) against the force, and the movable claw plate (35) and the claw holder are connected to the plate (36) to release the packaged product (10).
0°), but in Fig. 1, the arm (21) approaches the pair of clamping arms (27) (2111) and the roller (
When the roller (39) comes into contact with the adjustment cam (6B), the roller (39)
) is pushed slightly, and as a result, the movable claw plate (35) is slightly separated from the claw plate (3B) as shown in FIG. In this case, the bushing pin (59) continues to contact the movable claw plate (35) due to the reaction force of the spring (58), so the packaged product (100') is moved between the movable claw plate (35) and the bushing pin (35).
59), and as a result, as shown in Fig. 6, a gap is created between the movable claw plate (35) and the claw holder plate (3B), and the bag (100) is held at the intermediate portion thereof. Only the bag is held by the bushing pin (59), and in this state, the holding arms (27) and (28) approach from both sides to squeeze the bag opening, and at the same time, the binding material is attached to the bag opening. Thereafter, as shown in FIG. 1, the movable claw plate (35) is opened wide by the auxiliary cam (40), and the packaged product is discharged downward.

In addition, the bushing pin (59) is changed to an embodiment in which a spring is used for the pawl catch to press against the plate (35), and the ninth
The figure shows an embodiment in which the air cylinder (6) is fixed to the lower side of the arm (21), and the piston rod (62) presses the bushing pin (59) against the pawl plate (35). A constant pressure is always applied to the air cylinder (61), and the piston rod (62) is pushed back to the plate (35), and when the plate (35) is separated from the piston rod (62), the piston rod (62) is also pushed back. Follow and displace.

On the other hand, Fig. 10 shows a means for pushing out the movable iron core (84) by the electromagnetic force of the solenoid (63) and pressing the bushing pin (59) against the pawl plate (35). A certain magnetic force is generated, and the claw holder becomes a plate (3
The iron core (64) is displaced in accordance with the movement of the bushing pin (59), and the claw receiver of the bushing pin (59) maintains a constant pressing force against the plate (35).

Also, it is considered that the button pin (59) is pressed in the direction of the movable claw plate (35) in Fig. 4, but the situation is completely reversed, and the button pin (59) is pressed in the direction of the claw plate (36). It will be done. In this case, block (5
5) is provided on the movable claw plate (35) side, and the button pin (
59> is a spring that presses the pawl holder toward the plate (36). In this embodiment as well, in addition to the spring, air pressure and solenoid electromagnetic force shown in FIGS. 9 and 10 can be used.

By the way, in FIGS. 4, 9, and 10, a force such as a spring, air pressure, or electromagnetic force is always applied to the bushing pin (59), and when the opening of the bag is narrowed, the movable claw is moved while maintaining the force. By slightly separating the plate (35〉) from the plate (36), the center of the bag can be spot-pinned by taking advantage of the button pin (59) following the movable claw plate (35). However, Figs. 14 and 15 show an embodiment slightly different from this. In the case of Fig. 14, the block (55) provided under the arm (21〉) By providing the bushing pin (70) in a slidable manner and by aligning the pulley (72) provided at the end of the bushing pin (70) with the fixed cam (71), the movable claw plate (35>) is moved from the claw receiver to the plate (36). ).As can be understood by comparing Fig. 15 with Fig. 7, in Fig. 15 the auxiliary cam (6
6) and installed a new large fixed cam (71), which replaces the Butschpin pulley (72) in Fig. 15.
The circumferential surface of the fixed cam (71) protrudes from the rotating orbit (73) of the fixed cam (73), and therefore the pulley (72)
), the bushing pin (70) is pushed out. In Fig. 14, the tension of the spring (33) in the arm (21) causes the normal rod (32
), a force like the arrow (73〉) acts on the nail plate (35〉).
The claw holder is an elastic material (75) (7B) provided on the plate (36).
The bag (100) is held in close contact with the mouth of the bag (100), but as the pulley (72) comes into contact with the fixed cam (71),
The bushing pin (70) pushes open the movable claw/plate (35) while holding the bag (100) between them so as to compress the spring (33).

(Effects) In the present invention, the claw receiver provided on the rotor is a plate, and the claw receiver is a movable claw plate that moves toward and away from the plate to sandwich the packaged product, and the packaged product is transported by the rotation of the rotor. In a bag opening binding device in which the bag opening is held between a pair of clamping arms from both sides in order to wrap the binding material around the bag opening during transportation, a bushing pin with a small tip area is attached to the movable claw plate. The movable claw plate is slightly separated from the plate just before the pair of clamping arms squeeze the opening of the bag, and the bag is supported at a point by the movable claw plate and the bushing pin. When the arm squeezes the opening of the bag, the bag hardly lifts up. For this reason, there is no need for an extra large bag to allow for lifting of the bag, making it highly economical.Also, the edges of the bag can be tied in a naturally beautiful fan shape. Since the packaged product can be supported and transported by the plate and the movable claw plate, the packaged product does not sway horizontally and is stable.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an embodiment of the present invention, Fig. 2 is a partial vertical cross-sectional view of the previous figure, Fig. 3 is a partial perspective view of the previous figure, and Fig. 4 is a sectional view of the previous figure. , Fig. 5 is an explanatory view of the action, Fig. 6 is a plan sectional view of the previous figure, Figs. 7 and 8 are explanatory views of the action of the cam at the center of the rotor in Fig. 1, and Figs. 9 and 10 are other views. FIGS. 11 to 13 are explanatory diagrams of the conventional example, and FIGS. 14 and 15 are explanatory diagrams of another newer embodiment. (lO)...Packaging machine, (11)...Rotor,
(12)...Clamp arm, (13)...
Clip, (20)...disk, (21)...
・Arm, (27) (28)...Pinching arm, (3
1)...Lever, (32)...Rod, (33
)...Spring, (35)...Movable claw plate. (36)...Claw holder is a plate, (38)...Cam plate,
(58) Spring, (59) Bush pin, (81) Air cylinder, (63)
...Solenoid, (85) ...Bulge, (7
0)...Butushpin, (71)...Fixed cam, (100)...Bag, (100)...Packaged product. Figure 1 Figure

Claims (5)

[Claims] (1) A clamping force is applied to a pair of claw plates provided on the periphery of the rotor so that they can be opened and closed freely, and the upper edge of the bag filled with the item to be packaged is clamped between the two claw plates, and the rotation of the rotor causes the two claws to be clamped. In a bag opening tying machine that transports bags suspended from a board and is provided with a pair of clamping arms in the middle of the transport path to narrow the opening of the bag, the bag is transported from the direction of the claw plate on one side to the other. A push pin with a small tip area can be freely stroked toward the center of the side claw plate, and a unique pressure is attached to the push pin so that the tip of the push pin is always in pressure contact with the opposite claw plate. A bag supporting device comprising an element for slightly separating the bag from being held by the pair of claw plates at the position where the pair of holding arms are installed, while engaging the holding elements. (2) The bag support device according to claim 1, wherein the pressurizing element engaged with the push pin is formed by a spring. (3) The bag support device according to claim 1, wherein the pressurizing element engaged with the push pin is formed by a fluid cylinder. (4) The bag support device according to claim 1, wherein the pressurizing element engaged with the push pin is formed by an electromagnetic solenoid. (5) A clamping force is applied to a pair of claw plates provided on the periphery of the rotor so that they can be opened and closed freely, and the upper edge of the bag filled with items to be packaged is clamped between the two claw plates, and the rotation of the rotor causes the two claws to be clamped. In a bag opening tying machine that transports bags suspended from a board and is provided with a pair of clamping arms in the middle of the transport path to narrow the opening of the bag, the bag is transported from the direction of the claw plate on one side to the other. While a push pin with a small tip area faces freely toward the center of the side claw plate, the rear end of the push pin comes into contact with the position where the pair of clamping arms are installed and is integrated with the push pin. A bag support device comprising a fixed cam that acts to slightly push open the gap between the pair of claw plates against the clamping force.