JPH0655608B2 - Bag support device in bag mouth binding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention holds a packaging bag filled with an object to be packaged with a pair of claw plates from the front and back, and hangs the bag with the pair of claw plates. The present invention relates to a new improvement of a device for transporting the claw plate while transporting the claw plate in a device in which the mouth of the bag is narrowed during the transportation and is bound with a wire or the like.

(Prior Art) A rotary bag filling and packaging machine moves a large number of bags along a circular orbit, and in the middle of this movement, the bags are filled with the objects to be packed one by one and sent out. In order to bind the bags one after another, it is necessary to rotate a large number of sets of claw plates in synchronism with the rotary bag packing and packaging machine and bind the bags to be carried down by the claw plates of each set. That is, Japanese Patent Application No. 62-207143 (Japanese Patent Application Laid-Open No. 64-5863) which is a prior application of this application.
In the publication of 7), the nail plate (1) seen in front of the bag (4) filled with the object to be packaged (3) as shown in FIG. 11 and the invisible nail plate hidden behind the bag (4) are visible. (2) Grasp the bag with and hold it down, and while carrying the bag (4) with these claw plates (1) (2), approach the pair of clamping arms (5) (6) from both sides of the bag, As shown in FIG. 12, the mouth of the bag (4) is narrowed down by the holding arms (5) and (6), and the narrowed portion is a binding material such as tape or wire as shown in FIG.
It discloses that (7) is wrapped.

(Problems to be solved by the invention) However, in the device of the above-mentioned prior application, in order to carry the bag in a stable state, the support bars (1) and (2) have a certain length and hold the bag widely. , As shown in FIG. 11, when the pair of holding arms (5) and (6) are brought closer to the bag (4), the bag (4) is entirely lifted up by the amount that the bag mouth is narrowed down. So
When the lifting amount of the bag (4) was expected in advance, only a small amount of the packaged object could be accommodated in the ratio of the inner volume of the bag. In other words,
A large bag is required for the volume ratio of the packaged object, and the bag is wasted accordingly. When the bag mouth is squeezed narrowly as shown in Fig. 13, the upper edge (4a) of the bag usually has a beautiful fan shape, but it is held by the holding bars (1) and (2) to squeeze the bag mouth and bind it. When the material (7) was provided, there was a problem that the upper edge became an unnatural straight line.

Therefore, the present invention provides a supporting device that can hold a bag in a wide range and stably transport it, and can pack a large amount of objects to be packed in the bag even when bound.

(Means for Solving the Problem) In order to achieve the above-mentioned object, the present invention according to claim 1 provides a pair of arms at the tip of the arm protruding to the outer periphery of the rotor rotating on the horizontal plane by the vertical axis. A horizontally long claw plate is provided, and a coil spring is engaged with a rod that transmits power for relatively opening and closing these claw plates to the claw plate, and the tension of the coil spring causes the claw plates to be pressed against each other. The tip of the rod is engaged with the peripheral surface of the cam plate arranged concentrically with the vertical axis so that the cam plate releases the pressure contact between the two claw plates against the tension of the coil spring. On the other hand, in a bag mouth binding machine provided with a pair of holding arms for narrowing the mouth of the bag supported by these claw plates in the middle of transportation of the claw plates on the circular path, From the direction of to the center of the nail plate on the other side, The push pin is freely stroked, and the pressing pin is engaged with a pressure urging element so that the tip of the push pin is constantly in pressure contact with the claw plate facing it, while the bag supported by the claw plate is A second cam for releasing the crimping of the two claw plates while maintaining the pressure contact force of the push pin against the other side claw plate by the pressure urging element when the position of the holding arm for bundling is reached. Is provided in the passage area at the end of the rod.

Further, in the invention described in claim 5, a fixed cam is provided in place of the pressure urging element in the first claim, and when the fixed cam is extended at the binding position, the other side claw plate is pushed through the push pin. It is configured to open and release the pressure of the pair of claw plates.

(Function) The bag containing the article to be packaged is sandwiched between the pair of claw plates, that is, the claw receiving plate and the movable claw plate, but the claw receiving plate and the movable claw plate have a certain width so that the bag sways. It is carried relatively well without being. In this case, the push pin having a small tip area faces the intermediate portion of the claw receiving plate. Immediately before squeezing the bag being transported by a pair of holding arms, the movable claw plate is separated from the claw receiving plate within a range in which the contact between the push pin and the movable claw plate is not released, and the bag is spring-loaded. Point support is provided by the push pin and movable claw plate, while
In the fifth aspect, the push pin is pushed out by the fixed cam, and the push pin and the movable claw plate are point-supported. Therefore, a gap is created between the claw receiving plate and the movable claw plate, and the bag mouth can be narrowed down by the pair of holding arms without lifting the bag upward.

(Example) In FIG. 1, a bag filling and packaging machine (10) has a circular rotor (1
1) Multiple sets of clamp arms (12) on the periphery of 1)
(12) are provided at equal intervals, and the packaging bag (100) can be held by the clips (13) and (13) at the ends of the clamp arms. The rotor (11) intermittently rotates about the shaft (14) in the direction of the arrow, and the section (A) supports the packaging bag (100) with the vacuum cup (15) to attach it to the clips (13) (13). When supplied, the clip holds the packaging bag, rotates in the direction of the arrow, opens the mouth of the packaging bag at each section in the rotation trajectory, fills the packaged object and seasoning liquid, and then a pair of seals at the Y section. Such a configuration is generally known, in which the bag mouth is heat-welded with the bar and the packaged product (100 ') is released from the pair of clamp arms (12) and (12) at the Z section.

On the other hand, the binding device has four arms (21) (21) from the top of the disc (20).
(21) (21) is projected radially, but as shown in detail in Fig. 2, the cylindrical main shaft (26) is freely rotatable on the bearing (25) standing on the upper surface of the machine base (24). Each arm (21) is supported on the upper surface of a disk (20) fixed to the upper end of the main shaft (26), and each arm is provided with a nail receiving plate (36) at its tip. , A movable claw plate (35) is pivotally supported via a pin (30) so as to face the claw receiving plate, and a rod (32) having one end connected to an operation lever (31) of the movable claw plate is connected to the arm ( 21), the tension of the coil spring (33) wound around the rod is applied to the head (34) at the other end of the rod, and the tension of the spring (33) causes the movable claw plate (35). Presses against the claw receiving plate (36) to urge the packaged product (100 ') to always be clamped.

The drive shaft (42) connected to the motor via the chain wheel (41) inside the machine base and the main shaft (26) are engaged via the Geneva top (44), and the action of the Geneva top (44) Therefore, the main shaft (26) is intermittently rotated by 90 degrees. Therefore, in FIG. 1, four arms (21) (21) (21)
The disc (20) intermittently rotates in the direction of the arrow by the disc (20) at the same pitch as the mounting interval of each arm.

On the other hand, a core rod (37) whose lower end is fixed to the machine stand is erected in the hollow of the main shaft (26), and an auxiliary cam (40) is fixed to the upper end of the core rod (37). On the side, a circular cam plate (38) is rotatably supported by the core rod (37), and rollers (39) (39) (39) (39) provided at the other ends of the four rods are attached to the cam. It is arranged on the peripheral surface of the plate (38). Also, from the cam plate (38), pin (50) upward
Upright, the pin (50) is engaged in an arcuate groove (51) formed on the lower surface of the auxiliary cam (40), and the cam plate (38) is engaged only within the length of the groove (51). ) Is designed to rotate freely. Further, as shown in FIG. 7, a part of the peripheral surface of the cam plate (38) is bulged with a gentle gradient toward the moving direction of the roller (39), and the end end (52a) of the bulged portion (52) is bulged. ) At a steep angle to the peripheral surface of the cam plate, and as shown in Fig. 8, the end end (5
2a) is positioned so that it 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 bulging portion (52) of the cam plate, and as shown in FIG. The movable claw plate (35) is opened by pushing out the rod (32) provided with (3). The stop position of one roller (39) and the end end (52
Since it is positioned so that it matches (a), the roller (3
When (9) is stopped, the pressure of the spring (33) inside the arm is
Since it acts on the rounded portion of the end end (52a) of the cam plate via 9), the cam plate (38) reverses as shown by the arrow shown by the phantom line in FIG. Drop to the surface.
As a result, the movable claw plate (35) at the leading end is closed and the upper edge of the packaged product (100 ') is held by the claw receiving plate (36). In the above case, as shown in FIG. 8, the rear roller (39) is mounted on the auxiliary cam (40) so that the cam plate (38) can be easily reversed.
When the roller (39) starts moving again, the pressure of the spring (33) acts on the bulge (52) of the cam plate via the roller (39), so that the cam plate (38) is within the range of the groove (51). Only rotates counterclockwise and returns to the home position. The packaged product (100 ') is supported by the arm (21) and conveyed by the rotation of the disc (20), and at the first stop position, the pair of seal bars (22) and (23) are connected to the bag at the portion to be bound. Heat seal the pair of holding arms (27) (2
8) approaches from both sides and squeezes the bag mouth at the same time, and at the same time, one of the binding metal fittings continuously loaded in the holding arm (27) on one side is closed by the holding arms (27) (28). Squeeze it in your mouth.

Arms (21) for hanging the bag, as shown in FIGS. 3 and 4.
As seen in detail, on the back side of the claw receiving plate (36) laterally elongated and fixed to the arm (21) through the bracket (54), the arm (21)
The block (55) fixed to the position is located, the spring receiving plate (56) is arranged between the block (55) and the claw receiving plate (36), and the hole (57) formed in the block (55) is Internal spring
(58) urges the spring receiving plate (56) so as to push it toward the claw receiving plate (36), and further pushes a rubber push pin (59) with a small tip area in front of the spring receiving plate (56). And the push pin (59) is projected forward from the notch (60) at the center of the claw receiving plate (36). On the other hand, in FIG. 1, an adjustment cam (66) having a bulge portion (65) at the tip is provided with respect to the auxiliary cam (40) so as to face the position where the pair of holding arms (27) (28) exist. Position adjustment is fixed freely with screws (67) (67).

As shown in FIG. 4, the normally movable claw plate (35) normally pushes down the push pin (59) against the force of the spring (58), and the movable claw plate (35) and the claw receiving plate (36) package the product ( 100 ') but first
In the figure, when the arm (21) approaches the pair of holding arms (27) (28) and the roller (39) contacts the adjusting cam (66), the roller (39) is slightly pushed, and as a result, as shown in FIG. Movable claw plate like (35)
Slightly separate from the nail support plate (36). In this case, the push pin (59) will move to the movable claw plate (3
5) is kept in contact, so the packaged product (100 ') is
The supporting state is held by the push pin (59) and the push pin (59), and as a result, as shown in FIG. 6, a gap is created between the movable claw plate (35) and the claw receiving plate (36), and the bag (100 ), Only the middle part is held by the push pin (59), and in this state the holding arms (27) (28) approach from both sides and squeeze the bag mouth at the same time.
The binding material is attached to the bag mouth. After that, as shown in FIG. 1, the movable claw plate (35) is largely opened by the auxiliary cam (40), and the packaged product is discharged downward.

In addition, instead of the embodiment in which a spring is used to press the push pin (59) against the claw receiving plate (35), the air cylinder (61) is fixed to the lower side of the arm (21) in FIG. In this embodiment, the push pin (59) is pressed against the claw receiving plate (35) by the piston rod (62). A constant pressure always acts on the air cylinder (61) and the piston rod
(62) is pushed back to the pawl receiving plate (35), and when the pawl receiving plate (35) separates, the piston rod (62) also follows and is displaced. On the other hand, in FIG. 10, the movable iron core (6
It shows a means of pushing out 4) and pushing the push pin (59) against the claw receiving plate (35). A constant magnetic force is always generated in the solenoid (63), and the iron core (64) moves according to the movement of the pawl receiving plate (35).
Is displaced to hold the pressing force of the push pin (59) on the claw receiving plate (35) constant.

Further, in FIG. 4, the push pin (59) is attached to the movable claw plate (35).
It is conceivable to push the push pin (59) toward the claw receiving plate (36) by pressing the push pin (59) in the opposite direction. In this case, the block (55) is provided on the movable claw plate (35) side, and the push pin (59) is a spring and is a claw receiving plate.
It is pressed toward (36). Also in this embodiment, in addition to the spring, the air pressure and solenoid electromagnetic force shown in FIGS. 9 and 10 can be used.

By the way, in FIG. 4, FIG. 9 and FIG. 10 described above, when the push pin (59) is constantly applied with an urging force such as a spring, air pressure or electromagnetic force, the bag mouth can be moved while maintaining the urging force. By slightly separating the claw plate (35) from the claw receiving plate (36), the push pin (59) follows the movable claw plate (35), so that the center of the bag is spot-held. However, FIGS. 14 and 15 show an embodiment slightly different from this. That is, the 14th
In the case of the figure, the push pin (70) is slidably provided on the block (55) provided under the arm (21), and the fixed cam (7
The movable claw plate (35) is separated from the claw receiving plate (36) by pushing out the pulley (72) provided at the end of the push pin (70) in 1). As can be understood by comparing FIG. 15 with FIG. 7, the auxiliary cam (66) of FIG. 7 is eliminated and a new large fixed cam (71) is installed in FIG.
The peripheral surface of the fixed cam (71) protrudes from the rotation orbit (73) of the push pin pulley (72) in FIG. 5, so that the pulley (72) comes into contact with the fixed cam (71) to push the push cam. The pin (70) is pushed out. In FIG.
Due to the tension of the spring (33) in the arm (21), the normal rod
A force as indicated by an arrow (73) acts on (32), and the elastic materials (75) (76) provided on the claw plate (35) and the claw receiving plate (36) are in close contact with each other and the bag (100).
The mouth of the push pin (70) is held wide, but the push pin (70) causes the spring (3) to move when the pulley (72) contacts the fixed cam (71).
Movable claw plate (35) with bag (100) sandwiched to compress 3)
Push open.

(Effect) The present invention holds a packaged product with a claw receiving plate provided on a rotor and a movable claw plate that comes into contact with and separates from the claw receiving plate, and transports the packaged product by rotating the rotor to transport the packaged product. In order to wind the binding material around the bag mouth on the way, in the bag mouth binding device in which the bag mouth is sandwiched by the pair of holding arms, the push pin having a small tip area is opposed to the movable claw plate. , The movable claw plate is slightly separated from the claw receiving plate just before the pair of holding arms squeezes the bag mouth narrowly, and the movable claw plate and the push pin support the bag at a point, so that the pair of holding arms holds the bag. When squeezing the mouth thinly, the bag hardly lifts up. For this reason, it is not necessary to use an extra large bag in anticipation of the lifting amount of the bag, it is economical, and the rim of the bag can be naturally united with a beautiful fan shape, and it is usually a wide claw support plate. Since the movable nail plate and the movable claw plate can support and transport the packaged product, there is an effect that the packaged product does not roll and is stable.

[Brief description of drawings]

1 is a plan view showing an embodiment of the present invention, FIG. 2 is a partial vertical 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. 5, FIG. 5 is an operation explanatory view, FIG. 6 is a plan sectional view of the previous figure, FIGS. 7 and 8 are operation explanatory views of the cam centering on the rotor in FIG. 1, and FIGS. 9 and 10 are other. 11 is an explanatory view of a conventional example, and FIGS. 14 and 15 are explanatory views of another new embodiment. (10) …… Packing machine, (11) …… Rotor, (12) …… Clamp arm, (13) …… Clip, (20) …… Disc, (21) ……
Arm, (27) (28) …… Clamping arm, (31) …… Lever, (32)…
… Rod, (33) …… Spring, (35) …… Movable claw plate, (3
6) …… Pawl receiving plate, (38) …… Cam plate, (58) …… Spring, (59) …… Push pin, (61) …… Air cylinder, (63) …… Solenoid, (65)… … Bulging part, (70) …… Push pin, (71) …… Fixed cam, (100)… Bag, (10
0 ') ... Packaged products,

Claims (5)

[Claims] 1. A pair of laterally long claw plates is provided at the tip of an arm protruding to the outer periphery of a rotor that rotates on a horizontal plane by a vertical axis,
A coil spring is engaged with a rod that transmits the power for relatively opening and closing the claw plates to the claw plates, and the tension of the coil springs urges the claw plates to be pressed against each other. While engaging the tip of the rod with the circumferential surface of a cam plate arranged concentrically with the cam plate so as to release the pressure contact between the two claw plates against the tension of the coil spring,
In the bag mouth bundling machine provided with a pair of holding arms for narrowing the mouth of the bag supported by these claw plates in the middle of transportation of the claw plates on the circular orbit, the direction of the one side claw plate From above to the center of the claw plate on the other side so that the push pin with a small tip area can be freely stroked, and the push pin is pressed so that the tip of the push pin is always in pressure contact with the claw plate facing it. When the bag supported by the claw plate reaches the position of the holding arm for bundling while the force element is engaged, the pressing force of the push pin pressing force element of the push pin against the other claw plate on the other side. A bag supporting device in which a second cam for releasing the pressure contact between both claw plates while holding the above is provided in the passage area of the end of the rod. 2. The bag supporting device according to claim 1, wherein the pressing biasing element engaged with the push pin is formed by a spring. 3. The bag supporting device according to claim 1, wherein the pressure urging element engaged with the push pin is formed by a fluid cylinder. 4. The bag supporting device according to claim 1, wherein the pressure urging element engaged with the push pin is formed by an electromagnetic solenoid. 5. A pair of laterally long claw plates is provided at the tip of an arm protruding from the outer periphery of a rotor that rotates on a horizontal plane by the vertical axis,
A coil spring is engaged with a rod that transmits the power for relatively opening and closing the claw plates to the claw plates, and the tension of the coil springs urges the claw plates to be pressed against each other. While engaging the tip of the rod with the circumferential surface of a cam plate arranged concentrically with the cam plate so as to release the pressure contact between the two claw plates against the tension of the coil spring,
In the bag mouth bundling machine provided with a pair of holding arms for narrowing the mouth of the bag supported by these claw plates in the middle of transportation of the claw plates on the circular orbit, the direction of the one side claw plate To the center of the claw plate on the other side so that the push pin with a small tip area can be freely stroked, and another fixed cam (71) concentric with the cam plate can rotate the rear end of the push pin. The fixed cam (71) when the bag placed in the area and supported by the claw plate reaches the position of the holding arm for binding.
The device for supporting the bag, in which the push pin applies a pressing force to the claw plate on the other side by releasing the claw plate to release the pressure contact between the claw plates.