JPH01182221A - Rotary type apparatus for binding bag opening - Google Patents

Abstract

PURPOSE:To permit individual packed commodities to be bound at the same location, independently of the weight of the packed commodity released from a packing machine, by closing together holding claws at the end of a plurality of fluid cylinders extending in a radial manner from a disc plate at the top of a main shaft, simultaneously with the stopping of said disc plate under the control of a rotary valve. CONSTITUTION:A disc plate 20 is intermittently turned by driving a main shaft 26 at the pitch equal to the space between each fluid cylinder 21, while the main shaft 26 activates a movable member 38 to slidably rotate on the surface of a fixed member 39. A fluid pressure source and the cylinders 21 are connected through a rotary valve 50 and each cylinder 21 closes its own holding claws 35 and 36 in one stopping position, thereby grasping the opening end of a packed commodity released from a packing machine and carrying the same as such. The opening ends of packed commodities being carried are closed tight by the engagement of the ends of a pair of holding arms 22 and 23 caused by a groove cam 59 and then bound by a binding mechanism 60.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a device for sequentially tying the bag openings of packaged products, which is constructed by a rotary bag filling and packaging machine. To explain in more detail, the both sides of the packaging bag are held by clips at the tips of multiple pairs of clamp arms provided on the periphery of a disc, and the packaging is suspended from the clamp arms by the rotation of the disc. A rotary bag filling and packaging machine that transports bags in a circular orbit, and melts and seals the opening edges of the bags after each bag is filled with an article to be packaged while the bags are transported in a circular orbit. This is a binding device that narrowly squeezes the opening of a bag made of the adjacent bag filling and packaging machine, and binds the narrowed portion with tape or wire.

(Prior art) Japanese Patent Application Laid-open No. 182017/1987 discloses a system in which a large number of sets of two clamping arms are swingably supported via pins on the periphery of a disc that rotates intermittently by the drive of a central shaft. At the same time, when each of the clamping arms is engaged with a grooved cam provided concentrically with the disc and in an immovable state, and the disc rotates together with each clamping arm, the bending of the groove of the cam causes the pair to be separated. The tips of the clamping arms are brought close together, the opening of the packaging bag suspended from above is squeezed and transported by these clamping arms, and the packaging bag is passed through a binding mechanism provided in the transportation track, and the bag opening is taped. What is bound by is disclosed.

(Problems to be Solved by the Invention, etc.) However, the above-mentioned device is configured for bundling products made up of vertical pillow packaging. Even if the receiver is adjacent to the bagging and packaging machine and attempts to take and bundle the bags (packed products) made up of the bagging and packaging machine, it does not work. This is because in a rotary bag filling and packaging machine, the bagged products are suspended by clips on both sides of the bag opening, and even if the clamping arms are approached from both sides of the bag opening, the product will not be inside the bag. This is because the bag is so full that it is impossible to squeeze the opening of the bag. However, if you open the clip that hangs the bag while bringing the clamping arms closer together, the bagged items will instantly slide downward due to the weight of the items inside, and the tape binding positions will become uneven. .

Conventionally, this type of bundling device has been disclosed in Japanese Utility Model Application Publication No. 53-136963 and Japanese Patent Application Publication No. 59-26422, but in both of these, bagged products are placed on a conveyor and transported. For example, if an unstable flat bag is placed on a conveyor, the height of the bag will not be constant due to the weight of the product, and the tape will not be able to bind the bag at the same position. It becomes uneven.

In view of the above-mentioned points, the present invention provides a device that can bind individual bagged products at the same position regardless of the weight of the bagged products released from a rotary bagging and packaging machine. (The present application is an improvement of Japanese Patent Application No. 62-20.7143.) (Means for Solving the Problems) In order to achieve the above object, the present invention provides a rotatable support perpendicular to the machine base. A plurality of fluid cylinders are protruded radially at equal intervals from a disk at the upper end of the main shaft, and clamping claws are provided at the tips of the multi-fluid cylinders and each piston rod, while the disk is arranged at intervals between the fluid cylinders. The main shaft is connected to a power source so as to rotate intermittently at the same pitch as, and a pair of clamping arms are rotatably supported on each side of each fluid cylinder with respect to the disc, respectively. The operation pins of each clamping arm are engaged with grooved cams fixed on the machine base so as to be arranged around the main shaft, so that the tips of the multiple pairs of clamping arms approach each other while the disk rotates once. A movable member engaged with the main shaft and a fixed member supported on the stationary part form a rotary valve, and a fluid pressure source and each of the fluids are connected to each other through the rotary valve. A circuit is connected to the cylinders so that fluid pressure is applied to each fluid cylinder so that each clamping pawl closes at one stop point of each fluid cylinder, while the multiple pairs of clamping arms approach each other. It is constructed by installing a binding mechanism in the area where the vehicle is moved.

(Function) A plurality of fluid cylinders are protruded from a disc at the upper end of the main shaft at equal intervals, and the disc is intermittently rotated at the same pitch as the installation interval of the fluid cylinders by driving the main shaft. Each fluid cylinder moves so that it always stops at the same position.

On the other hand, a rotary valve is formed by a movable member engaged with the main shaft and a fixed member supported by an immovable part, and in this rotary valve, the movable member slides on the surface of the fixed member and rotates due to the movement of the main shaft. . The fluid pressure source and the fluid cylinder are connected in a circuit through this rotary valve, and each clamping claw is closed at one stop point of each fluid cylinder, so that the fluid cylinder stops at a stop point. When the fluid cylinders are installed so that they coincide with the release position of the packaged product in the rotary bagging and packaging machine, each fluid cylinder stops and at the same time catches the bag opening of the packaged product made up of the bagging and packaging machine and releases the packaged product in a crisp manner. Transport it with it in place.

Further, a pair of clamping arms are provided on the disc on each side of each of the fluid cylinders, and the operating pins of each clamping arm are engaged with grooved cams, so that the tips of the paired arms are brought close to each other by the grooved cams. Since each packaged product is being carried while being supported by the clamping claws as described above, the opening of the bag is narrowed by the pair of clamping arms, and these 8
A tying mechanism provided in the region where the pair of clamping arms move close to each other allows the tying to be applied to the narrowed portion of the bag opening.

(Example) In Fig. 1, the bagging and packaging device m (10) is equipped with a large number of pairs of clamp arms (12H12) arranged at equal intervals around the periphery of a circular rotor (moon). Attach the packaging bag (1) using the clip (13) at the end of the clamp arm (13).
00) can be held. 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 the vacuum cup (15) 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. A bar (16) (1B) thermally inspects the bag opening and a seventh section releases the packaged product (100') from the pair of clamping arms (12) (12), such an arrangement is generally known. .

On the other hand, the binding device radially protrudes three fluid cylinders (21) (21H21) from the top of the disc (20),
A pair of clamping arms (2
2) (23)... is installed and configured. More specifically, as shown in Fig. 2, a cylindrical main shaft (26) is rotatably supported on a bearing (25) erected on the upper surface of a machine stand (24), and Fixed disk (20
), each of the fluid cylinders (21) is supported on the upper surface of the cylinder, and each of these fluid cylinders has a movable claw (3
5) via a pin (30), a piston rod (3?) is connected to one end of the operating lever (31) of the movable claw, and a coil spring (
The tension of 33) always urges the clamping claw formed by the movable claw (35) and the fixed claw (36) provided at one end of the fluid cylinder to open.

A driving shaft (42) connected to the prime mover via a bevel gear (41) inside the machine and a driven wheel (43) provided parallel to the driving shaft are engaged via a Geneva stop (44), The chain wheel (45) provided on the driven wheel and the chain wheel (46) provided at the lower end of the main shaft are connected via a chain (47), and the main shaft (2) is connected by the action of the Geneva stop (44).
6) is intermittently rotated by 120 degrees. For this reason, in Fig. 1, three fluid cylinders (21)
(21) In (21), the mounting of each fluid cylinder is intermittently rotated in the direction of the arrow at the same pitch as the interval by the disk (20).

On the other hand, attach the 8 rod (37) whose lower end is fixed to the machine base to the main shaft (26).
), a circular fixed member (39) is fixedly supported on the seat plate (40) at the upper end of the eight bars, and a movable member (38) is installed on this fixed member; The fixed member (39) and the movable member (38) form a rotary valve (50). Further, the lower end of a passage (27) formed along the inside of the eight rods (31) is connected to a pressure source via a hose (28), and the upper end of the passage (27) is connected to the fixing member (39). ), and three holes (29) at the top and bottom of the movable member (38).
(29) and opened these 8 holes (29) (29)
(29) and the three fluid cylinders (21) (21
) (21) and tubes (34) (34) respectively.
(34). Further, an L-shaped engagement member (
48), and the attachment (49) provided on the upper surface of the disc (20) is hooked on the engagement member (48), so that the disc (20) and the movable member (38) interlock with the body. The clamping claw at the tip of the fluid cylinder closes against the tension of the spring (33) only while pressurized fluid is acting on the fluid cylinder (21) through the tube (34). . Therefore, the clamping claws are set to close at the same time as the disk (20) stops, and the position where the clamping claws close is the position where the packaging machine (10) releases the packaged product (100'), as shown in Figure 1. Accordingly, the three fluid cylinders 21) successively receive and transport the packaged products packed in bags by the packaging machine (10).

As shown in FIG. 1, a pair of clamping arms (22) (
23) via pins (5B) (5B), and a grooved cam (59) fixed around the upper end of the bearing (25).
), that is, two endless grooves (55) and (56) as shown in Fig. 3 are formed in the groove cam, and each operating pin (53) ( 5
4) are engaged with both the grooves (55) and (56). There, the disk (20) is rotated by the main shaft (26), and the operation pins (53) (54) of the clamping arm supported by the disk are rotated.
runs along the grooves (55) (5B), the main shaft (26
) during one rotation, the open ends of the pair of clamping arms (22H23) approach each other, and narrow the opening of the packaged product (100') between the recesses (57) (57) at the tips (Fig. 1). ). A binding mechanism (60) using a known tape is provided in the running area of the tip of the clamping arm, and the clamping arm (22H23) is attached to this binding mechanism (60).
By passing the packaged product (100') that has been narrowed down with
(23) is opened, and the bundled packaged products fall downward.

The rotary valve (50) in Figure 2 has a fixed member on the lower side and a movable member on the upper side, but as shown in Figure 4, the main shaft (2
It is also possible to provide the movable member (38) directly on the movable member 6), and also to provide the fixed member (39) on the movable member supported by the immovable part (52) via the stay (51). .

Further, although the rotary valve (50) shown in FIGS. 1 and 4 has the function of switching and controlling the fluid itself, it is also possible to consider that the rotary valve (50) is simply a rotating joint for a fluid circuit. As shown in Figure 5, this conceptual configuration consists of three
switching valves (70), (71), and (72) are installed, and the rotation joint (
3 holes (29) (29) (29) in 50)
and the three fluid cylinders (21) (21H21) are connected via tubes (34H34) (34), and the spools (75) (76) in each of the switching valves
) Bring one end of C771 into contact with the peripheral surface of the immovable cam (80) on the lower side of the rotating joint (50). The spool (7
5) is pressed against the cam (8o), and the spool (7o)
5) blocks fluid pressure at the swollen portion of the circumferential surface of the cam (8o), and applies fluid pressure to the fluid cylinder (21) at a low portion of the circumferential surface of the cam. Therefore, by setting the spool (75) to fall from the end of the swollen part of the cam (80) to a lower part at the same time as the disc (20) stops, the packaging machine You can catch packaging products. However, in Figure 5, the control function of the rotary valve is controlled by three switching valves (70) (71) (
72), and since there is no particular difference in effect, from the standpoint of a design change, this embodiment falls within the scope of the claims of the present application. In addition, the concept of "cam" in the above is .

It is not limited to the purely mechanical type shown in FIG. For example, a phototube can be provided at a defined position, and when a switch reaches a certain position of the phototube, an electromagnetic switching valve is actuated.

(Effects) The present invention radially protrudes a plurality of fluid cylinders (21) from the disk (20) at the upper end of the main shaft (26),
A clamping claw is provided at the tip of each of these fluid cylinders, and a disc (
20) is designed to close at the same time as the machine stops, so the location where the clamping claws clamp the packaged product is aligned with the location where the rotary bagging and packaging machine releases the packaged product. When the device of the invention is installed, it is possible to support the packaged product in a hanging manner with each clamping claw and transport it in a circular orbit, and while the packaged product is being transported in the circular orbit, the mouth of the packaged product can be held by the pair of clamping arms. It can be narrowed and tied. Therefore, compared to the conventional system in which the packaged products are directly transferred from the bagging packaging machine by holding the packaged products between the pair of clamping arms, it is possible to transfer the packaged products from the bagging packaging machine without regard to the weight of the products inside the bag. It has the effect of being able to tie together certain areas.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along the line ■-■ in the previous figure, FIG. 3 is a view taken along the line ■-■ in the previous figure, and FIGS. 4 and 5. is an explanatory diagram of another embodiment, and FIG. 6 is an explanatory diagram of a packaged product. (10)...Bagging packaging machine, (11)...Rotor, (12)...Clamp arm, (20)...
・Disk, (21)...Fluid cylinder, (22)
(23)... clamping arm, (24)... machine base,
(26)... Main shaft, (27)... Passage, (31
)...Operating lever, (33)...Coil spring, (34)...Tube, (35)...Movable claw, (36)...Fixed claw, (38)...Movable member , (39)...Fixing member, (42)...Driving shaft, (44)...Geneva stop, (48)...
Engagement member, (49)... Attachment, (50
)...Rotary valve, (53)...Operation pin, (59)...Groove cam. Figure 1 Figure 3

Claims (1)

[Claims] A plurality of fluid cylinders are protruded radially at equal intervals from a disk at the upper end of the main shaft which is rotatably supported perpendicular to the machine base, and gripping claws are provided at each of the fluid cylinders and at the tip of each piston rod. The main shaft is connected to a power source so that the plate is intermittently rotated at the same pitch as the installation interval of the fluid cylinders, and a pair of clamping arms are rotatably connected to the disc on both sides of each fluid cylinder. The operating pins of each of the clamping arms are engaged with grooved cams fixed on the machine stand and arranged around the main shaft, and each pair of clamping arms is rotated while the disc rotates once. While the grooves of the grooved cam are formed so that the tips approach each other, a rotary valve is formed by the movable member engaged with the main shaft and the fixed member supported by the stationary part, and fluid pressure is applied through the rotary valve. a circuit connection between a source and each of the fluid cylinders such that fluid pressure is applied to each fluid cylinder such that each clamping pawl closes at one stop point of each fluid cylinder;
A rotary type bag opening tying device comprising a tying mechanism installed in an area where each pair of clamping arms move close to each other.