JPS6193010A - Vessel molding equipment in packaging machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a packaging machine, more specifically, to a packaging machine that uses a web as a packaging material, forms the web into a tube, fills it with contents such as fluid food, and then finalizes it. In packaging machines that typically form box-shaped containers, a tube filled with contents is sealed at the required width for each length equivalent to one container.
The present invention relates to a container forming apparatus that cuts the seal width at the middle part of the seal width.

Prior art and its problems As a conventional device of this type, for example,
As disclosed in Japanese Patent No. 427, it is equipped with a molding jaw and a pair of swinging arms fixed so that the jaws face each other, and both swinging arms are opened and closed by a connecting mechanism, and are opened and closed by a drive mechanism. A device is known in which the jaws are drawn toward each other to generate a sealing pressure between the jaws, but this method has the following problems. First, since the coupling mechanism and the drive mechanism are connected to the swing arm and move up and down together with the swing arm, the movable parts occupy a large space. Second, because the structure is complex,
It requires a lot of effort to adjust each part.

An object of the present invention is to provide a container forming device for a packaging machine that eliminates all of the above problems.

Means for Solving the Problems A container forming device in a packaging machine according to the present invention seals a vertical tube filled with contents with a required width for each length corresponding to one container, and seals a vertical tube filled with contents with a required width, and In a container forming device of a packaging machine that cuts parts, a pair of forming jaws and a pair of forming jaws are fixed at the upper part so as to face each other and supported at the lower part by a slide which can be raised and lowered to swing around horizontal parallel axes. and an arm opening/closing device that swings both the swinging arms between a closed position where the jaws approach each other and a closed position where the jaws separate from each other. a vertical rotating shaft connected to the vertical rotating shaft so as to be able to freely rotate and move up and down with the slide; a horizontal rotating body fixed to the vertical rotating shaft so that this is the center of rotation; and one end attached to the horizontal rotating body on both sides of the center of rotation. It is characterized by comprising a pair of rods, each of which is connected to the other end of the rod, and the other end of which is connected to each of the two swing arms.

Example A container forming device in a packaging machine is a device that seals a vertical tube (1) filled with contents at a required width for each length corresponding to one container and cuts the middle part of the seal width. As shown in FIGS. 1 and 2, it consists of a left half part and a right half part which have the same structure but are arranged in different directions, and each part has a forming jaw (2). and,
A horizontal parallel shaft (4) is attached to a slide (3) that has jaws (2) fixed to face each other at the top and can be raised and lowered at the bottom.
A pair of swing arms (5) supported to swing around the center.

Further, the container forming apparatus has an arm opening/closing device (
6), a press device (7) that draws the jaws (2) toward each other to generate sealing pressure between them, and a slide drive device (8) that raises and lowers the slide (3).

The jaws (2) are horizontal plate-shaped with a substantially rectangular cross section, and are respectively attached to opposing surfaces of the upper end lateral protrusions (9) of both swing arms (5).

Although not shown, a heat-sealing heater is embedded in one of the jaws (2), and a cutter is embedded in the other. The slide (3) consists of a vertical cylindrical part (10) and a pair of left and right arm support boss parts (11) integrally provided at the middle part of the outer circumferential length of the vertical cylindrical part (10). Both arm support boss portions (11) are provided with through holes (
12), and the horizontal parallel shafts (4) are supported via bearings (13) across the left and right through holes (12).

The opening end of each through hole (12) is covered with a lid (14). A pair of front and rear rollers (15) for preventing slide rotation are provided on the outer surface of one of the left and right arm support bosses (11) facing outward. These rollers (15) sandwich the vertical guide rail (16) from both left and right sides. The swinging arm (5) consists of a flat rectangular block (17) whose thickness is in the front-rear direction, and a horizontal bar (18) that is moved on the top of the block (17) so that half of its thickness extends to the side. ) and horizontal bar (18)
It consists of a prismatic block (19) with a substantially rectangular cross section suspended from the lower surface of the protrusion. The projection of the horizontal bar (18) and the prismatic block (19) form the upper lateral projection (9) of the swing arm (5).

The two slides (3) are synchronously moved up and down alternately in different directions with predetermined strokes.

That is, when one slide (3) goes up, the other slide (3) goes down. By mutually closing the jaws (2) when the slide (3) is at the upper limit position of its vertical stroke, the tube (1) is strongly pressed across a predetermined width and sealed. Joe (2) is the tube (1)
) is pushed down together with the slide (3), thereby feeding the tube (1) by a length corresponding to one container. When the slide (3) reaches its lower limit position, the cutter is activated and the tube (1) is cut in the middle of its sealing width height. Then, Joe (2)
is opened to release the tube (1,). As a result, a portion corresponding to one container at the tip of the tube (1) is separated from the other portions.

Further, above the jaw (2), although not shown in detail, a pair of front and rear divided rectangular cylindrical movable press molds (20) and a pair of left and right movable reloading pieces (27) are provided, respectively. Rollers (22) are attached to the upper end of the movable mold (20) in a protruding manner, and these rollers (22) are connected to the cam (23).
), the movable mold (20) swings in opposite directions about its lower end. The inner peripheral surface of the movable mold (20) in the assembled state is formed in a shape similar to the outer peripheral surface of the completed box-shaped container. Movable press mold (2
0) and press the tube (1), one end of the tube (1) is formed flat and its outer peripheral surface is formed as square as possible to form a box-shaped container, and at the same time, the tube (1) ) is determined. The movable reloading piece (27) has an omitted cross-sectional shape, and is connected to each other around the lower end and the side by a horizontal retractable rod (24) provided on the upper part of the swing arm (5) and a rack and a pinion (not shown). swing in the opposite direction. Horizontal advance/retreat rod (2
4) has a cam (25
) and its follower (26) are connected. The movable redrawing piece (27) cooperates with the movable die (20) to form a protruding triangular eye at the end of the flat tube (1).

The arm opening/closing device (6) has a vertical rotation shaft (27) connected to the slide (3) so as to be rotatable and to move up and down together with the slide (3), and a vertical rotation shaft (27) that is the center of rotation. a horizontal rotating body (28) fixed as such;
It consists of a pair of rods (29), one end of which is connected to the horizontal rotating body (28) on both sides of its rotation center, and the other end of which is connected to both swing arms (5), respectively.

The vertical rotation axis (27) is connected to the vertical cylindrical part (
10) is rotatably inserted through the bush (30). A collar (31) for receiving the lower end of the cylindrical portion (10) is formed at the midpoint of the length of the vertical rotation shaft (27). The vertical rotation shaft (27) is rotatably and vertically supported by upper and lower bearings (32) and (33) at its upper end and the lower part of the collar (31), respectively. The part of the vertical axis of rotation ° (27) received by the lower bearing (33) has a spline (3).
4) is provided.

The outer ring (35) of the lower bearing (34) is fixed to the frame so as not to rotate. In addition, the inner circle (36)
is fitted into a spline (34), and rotates with the vertical rotation shaft (27) but does not move up or down. A swing arm (37) is fixed to the inner ring (36). A rod (38) extending from the slide drive device (8) is connected to the swing arm (37). Further, a vertical rod-shaped connecting member (39) is fixed to the lower end of the vertical rotating shaft (27) in line with the vertical rotating shaft (27), and is horizontally attached to the connecting member (39) through a bearing (40) perpendicularly thereto. A rod-shaped connecting member (41) is fixed. Lower ends of a pair of parallel rods (42) are attached to both ends of the horizontal bar-shaped connecting member (41). The upper end of the parallel rod (42) is connected to the slide drive device (8) via a rectangular frame-shaped connecting member (43).

The horizontal rotating body (28) consists of a mounting boss (44) at the center and a pair of arms (45) extending from the center on both sides.
0) is keyed to the vertical rotation shaft (27) in a state of contact with the upper end. A cap nut (46) into which the vertical rotation shaft (27) is inserted is placed over the mounting boss (44) and tightened onto the vertical rotation shaft (27). As a result, the slide (3) and the horizontal rotating body (28) are moved to the vertical rotation axis (
27). The connection between the horizontal rotating body (28) and the pair of rods (29) is achieved by a vertical pin (47) and a spherical bearing (48). On the other hand, the same rod (29) and both swing arms (
The connection with 5) is achieved by a horizontal pin (49) and a spherical bearing (50).

When the vertical rotating shaft (27) is moved up and down, the slide (3) is moved up and down together with the horizontal rotating body (28) accordingly. On the other hand, when the vertical rotating shaft (27) is rotated, the horizontal rotating body (28) rotates around the vertical rotating shaft (27), and the pair of rods (29) connected thereto rotate.
), the two swing arms (5) swing between a closed position in which they are upright and a closed position in which they are tilted to one side.

As shown in detail in FIGS. 6 to 8, the press device (7) has one of the two swing arms (5).
5); a hydraulic cylinder (53) having a horizontal rotation shaft (51) provided on the upper part of the horizontal rotation shaft (51); and a piston rod (52) that is provided integrally with the horizontal rotation shaft (51) and moves back and forth in the radial direction of the horizontal rotation shaft (51); , a movable claw (55) connected to the screw rod (52), and a horizontal rotation shaft (51) which is swingably provided near the horizontal rotation shaft (51) of the swing arm (5). an actuating arm (56) having a swing center concentric with or parallel to the rotation center thereof, and a spring (56) that urges the actuating arm (56) to swing in the same direction as the rotational direction of the horizontal rotation axis (51). 57) is provided on the other swinging arm (5), and in the latter stage of the swinging movement of both swinging arms (5) from the closed position to the closed position, comes into contact with the actuating arm (56) and causes this to move to one side. an operating arm pushing piece (58) that swings in the same direction as the swinging arm (5) of the other swinging arm (5);
A fixed claw (60) is provided on the movable claw (55).
).

The horizontal rotation shaft (51) passes through the prismatic block (19) of the swing arm (5) and is rotatably received by the bush (61). A hydraulic oil communication hole (62) is eccentrically bored in the axial direction of the horizontal rotation shaft (51).

Both left and right ends of the horizontal rotation shaft (51) are prismatic blocks (1
9), and a fluid pressure cylinder (53) is integrally provided at each projecting end. The piston end (52) is always urged in the protruding direction by a spring (63). The above hydraulic oil communication hole (62
) communicates with the front chamber of the fluid pressure cylinder (53) partitioned into the front and rear by the piston head (52).

Of both fluid pressure cylinders (53), attach the right edge to the rear surface of the left fluid pressure cylinder (53).
), and a rectangular mounting plate (64) is fixed to it so as to protrude beyond the retractable lever (64) via a bush (65).
66) is supported. A hydraulic oil supply hollow pipe (67) is rotatably provided at the top of the flat rectangular parallelepiped block (11) of the swing arm (5) so as to be coaxial with the horizontal rotation axis (51). An actuation arm (56) is attached to the. A connector (68) is attached to the right end of the hollow tube (67).
) is installed. 7 on the left end of the hollow tube (61)
A flange (69) is provided, which is screwed to the right side surface of the left hydraulic cylinder (53). Operation 11i! (56) is a bushing (7) attached to the hollow tube (67).
A boss (71) is rotatably fitted through the boss (71), and an O-ra (72) extends downward from the boss (71) and has an O-ra (72) at the tip.
a downwardly projecting arm (73) having a rearwardly projecting arm (73) extending outwardly from the boss (71) and having one end of a tension coil spring (74) attached to its tip; It consists of a protruding ear (76) protruding from the top. The protruding ears (76) are connected to the retractable rod (66) via the pin (71) with the front end thereof sandwiched therebetween. A spring receiver (78) is fixed to the rear end of the advancing/retracting rod (66), and a compression coil spring (57) is installed between the spring receiver (78) and the mounting plate (64). This spring (5γ) urges the operating arm (56) to rotate in the same direction as the rotational direction of the horizontal rotation shaft (51). The other end of the tension coil spring (57) is attached to the left side of the swing arm (5), and this spring (57) causes the operating arm (5) to
is biased to rotate clockwise in FIG. The actuating arm pushing piece (58) is a rectangular plate-shaped piece that is long in the front-rear direction, and its tip is formed in a slightly upwardly sloping shape, and this comes into contact with the roller (72) of the actuating arm (56). It is fixed to the left side of the other swing arm (5).

Now, both swing arms (5) are moving toward the closed position from the closed position r! Assume that you are currently working. At this time, the movable claw (55) is maintained in an upward position inclined toward the cocoon weight rather than perpendicular to the swing arm (5). Eventually,
When both swing arms (5) reach the vicinity of the closed position, the actuating arm pushing piece (58) comes into contact with the roller (72) and pushes it. The actuating arm (56) then rotates counterclockwise in FIG. The operating arm (56) is connected to the horizontal rotation axis (51
), the horizontal rotation shaft (51) does not rotate together with the operating arm (56), but when the operating arm (56) rotates in the same direction, the forward/backward lever (66) ) tries to pull out forward from the mounting plate (64), but the compression coil spring (57) prevents this, and this spring (57) keeps the mounting plate (64) horizontal along with the fluid pressure cylinder (53). It rotates counterclockwise around the rotation axis (51). As a result, the movable claw (55) rotates together with the fluid pressure cylinder (53), changes from an upward position to a horizontal position, and is engaged with the fixed claw (60). In this state, when hydraulic oil is supplied to the fluid pressure cylinder (53) and the piston rod (52) is retracted, the movable claw (55)
moves rearward together with the piston rod (52), the movable claw (55) and the fixed claw (60) attract each other, and sealing pressure is generated between both jaws (2). Both claws (55) (
Although there is a slight gap between the jaws (2) when the jaws (60) engage with each other, that gap disappears when the claws (55) and (60) are drawn together. In this case, both swing arms (5) will fall slightly inward from their upright state. At this time, in order for the movable claw (55) to maintain a horizontal position, it is necessary for the movable claw (55) to be in a slightly upward position with respect to the first moving arm (5). 6
4) compresses the compression coil spring (57),
It is allowed to change the position.

As shown in detail in FIGS. 9 to 12, the slide drive device (8) has a plurality of cam shafts fixed at a plurality of positions in the length direction of the camshaft (79) and formed in shapes with different cam contour surfaces. cams (80) (81) and their followers (83), each cam (80) (81)
) A roller (82) is movably provided parallel to the camshaft (79) so as to be able to come into contact with the contoured surface of the camshaft (79).

The cams (80) and (81) are plate cams whose outer peripheral surfaces have cam contour surfaces, and are fixed to mounting bosses (84) keyed to the cam shaft (79). Further, a drive sprocket (85) is keyed to the camshaft (79). The follower (83) is box-shaped with an open bottom and long in the front-rear direction, and is supported at its rear end by a bracket (86) and a horizontal shaft (87) provided thereon, and has the square frame-shaped connection at its front end. A member (43) is attached so that its length can be freely adjusted.

A rod (88) of a fluid pressure cylinder for follower restraint is connected to the longitudinally intermediate portion of the top of the follower (83). Inside the follower (83), a pair of parallel guide rods (89) are provided horizontally across both left and right walls thereof. A sliding piece (90) is supported on the guide rod (89), and a roller (82) is attached to this through a horizontal pin (91). Also, on the outer surface of the left side wall of the follower (83) is a fluid pressure cylinder (92) for switching the slide slide 1-○-.
is installed.

The rod (93) of the fluid pressure cylinder (92) passes through the left side wall and is connected to the sliding piece (90).

When the fluid pressure cylinder (92) is actuated to move the sliding piece (90), the O-ra (82) moves together with this. As a result, the O-ra (82) is connected to either cam (8G
) (81). When the camshaft (79) is rotationally driven in this manner, the rotational movement of the cam (80)
) (81) and its follower (83), it is converted into a reciprocating motion and transmitted to the vertical rotation shaft (27) as an up-and-down motion. It goes without saying that the stroke corresponds to the shape of the contour surface of the cam (80)<81).

Cam@II (79) has another type of cam (94) in addition to the above cams (80) and (81) attached to the mounting boss (95).
), and a follower (96) is provided corresponding to this cam (94). Follower (
96) has a shape seen from the side, with a bracket (97) and a horizontal shaft (97) attached to it in the center.
98). A roller (99) abutting the cam (94) is provided at one end of the follower (96). One end of the rod (38) connected to the above-mentioned swing arm (31) is connected to the other end of the follower (96), and a follower restraining fluid pressure cylinder (100) is connected to the other end of the follower (96). ) rod (101
) are connected.

When the camshaft (79) rotates, the rod (38) reciprocates in its length direction via the cam (94) and its follower (96), causing the swinging arm (37) to swing.

Then, the inner ring (36) of the bearing (33) rotates together with the first moving arm (31), and the vertical rotating shaft (27) connected to rotate therewith rotates.

Effects of the Invention According to the present invention, since the arm is opened and closed by a vertical rotation shaft, a horizontal rotation body, and a pair of rods, the movable parts that move up and down together with the arm can be made small and the structure can be simplified.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show an embodiment of the present invention, and FIG. 1 is a side view, and FIG.
The figure is a cross-sectional view taken along the line ■-■ in Figure 1, Figure 3 is an enlarged cross-sectional view taken along the line ■-■ in Figure 2, and Figure 4 is the rV-T shown in Figure 3.
V-line arrow view, Figure 5 is a sectional view taken along the v-■ line in Figure 3,
Figure 6 is a sectional view taken along the Vl-Vl line in Figure 4, Figures 7 and 8 are sectional views taken along the ■-■ line and ■-■ line in Figure 6, respectively, and Figure 9 is a slide drive Figure 10 is a front view showing parts of the device;
1 and 12 are cross-sectional views taken along the lines XI--XI and xi--xi in FIG. 10, respectively. (1)...tube, (2) jaw, (3)...slide, (4)...horizontal parallel shaft, (5)...arm, (6)...arm opening/closing device, ( 7)...Press device, (8)...Slide drive device, (27)...Vertical rotating shaft, (28)...Horizontal rotating body, (29)...
Rod, (51)...Horizontal rotating shaft, (52)...Piston rod, (53)...Fluid pressure cylinder, (55
)...Movable claw, (56)...Operating arm, (57)...
・Spring, (58)... Actuation arm pushing piece, (60)...
Fixed claw, (79)...Camshaft, (80) (81)...
-Cam, (82)...Roller, (83)...Follower. 4 people other than above

Claims (1)

[Claims] In a container forming device of a packaging machine that seals a vertical tube (1) filled with contents with a required width for each length corresponding to one container and cuts the middle part of the seal width, a forming jaw ( 2), and a pair of swinging arms that have jaws (2) fixed to the upper part so as to face each other and supported to swing about a horizontal parallel axis (4) by a slide (3) that can be raised and lowered at the lower part. (5), and an arm opening/closing device (6) for swinging both swing arms (5) between a closed position where the jaws (2) approach each other and a closed position where the jaws (2) separate from each other. It is equipped with an arm opening/closing device (6
) is rotatable to slide (3) and slide (3)
A vertical rotating shaft (27) connected to move up and down with the
, a horizontal rotating body (28) fixed to the vertical rotating shaft (27) with this as the center of rotation, and one end of the horizontal rotating body (28).
28) and a pair of rods (29) connected to each other on both sides of the center of rotation, and the other ends of which are connected to both swing arms (5), respectively.