JPH0117923B2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention uses web as a packaging material,
In a packaging machine that manufactures rectangular parallelepiped containers, after forming the web into tubes and filling them with contents such as fluid food, the contents-filled tubes are divided into tubes with a length corresponding to one container. The present invention relates to a container forming apparatus that separates seals and forms bag-like containers.

Conventional technology This type of device includes, for example,
As disclosed in Japanese Patent No. 43427, there is provided a container forming apparatus which clamps and seals a content filling tube at intervals corresponding to a length of one container, and cuts the middle part of the sealing width. A frame, a pair of front and rear swing arms attached to the elevating frame by a pair of front and rear parallel horizontal support shafts at the bottom, a pair of swing arms that are fixed to face each other at the top of both swing arms, and both swing arms. an arm opening/closing device that swings both swinging arms between a closed position where the two swing arms approach each other and an open position where they are separated from each other; It is known that the press device is equipped with a press device that generates heat, and the press device is constituted by a link mechanism, a cam mechanism, etc.

Problems to be Solved by the Invention In the conventional device described above, most of the link mechanism, cam mechanism, etc. are forced to move up and down together with the lifting frame, so the movable parts occupy a large weight in the entire device. Become. for that,
It is necessary to secure a large space for movement, which is a major factor hindering the downsizing of the device.

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

Means for Solving the Problems A container forming device in a packaging machine according to the present invention is such that, in the conventional container forming device described above, the press device is provided on the rear swinging arm so as to protrude between both swinging arms and is directed upward. A fixed engagement member having an engagement recess, a movable engagement member having a downward engagement protrusion that engages with the engagement recess, and a piston rod to which the movable engagement member is attached, and a front swing arm. a hydraulic cylinder fixed to a horizontal rotation shaft provided in parallel with the support shaft at the upper part; an actuation lever attached to the rotation shaft so as to be able to swing freely relative thereto; and having an upward arm and a downward arm; A push piece that is fixed to the swing arm and that comes into contact with the downward arm and pushes it forward while both swing arms swing from the open position to the closed position; and a transmission means for transmitting the swinging motion of the operating lever to the fluid pressure cylinder, the transmission means comprising:
An advancing/retracting rod whose rear end is attached to an upwardly facing arm via a horizontal pin and extending forward; and a rod receiving plate which is fixed to a fluid pressure cylinder orthogonally to the advancing/retracting rod and through which the advancing/retracting rod can freely slide. It is characterized by comprising: a spring receiver provided at the front end of the reciprocating rod; and a compression spring fitted into the retractable rod and interposed between the rod receiving plate and the spring receiver.

Function The press device of the container forming apparatus includes a fixed engagement member that is provided on the rear swinging arm so as to protrude between both swinging arms and has an upwardly directed engagement recess, and a downwardly directed engagement member that engages with the engagement recess. Since the movable engaging member has an engaging convex portion and a fluid pressure cylinder having a piston rod to which the movable engaging member is attached, the piston rod moves in and out with both engaging members engaged. When the hydraulic cylinder is actuated in this manner, both swing arms are drawn toward each other via both engaging members, thereby generating sealing pressure between both jaws.

The fluid pressure cylinder is fixed to a horizontal rotation shaft provided on the upper part of the front swing arm in parallel with the support shaft, and the press equipment has a horizontal rotation shaft installed on the rotation shaft so as to be able to swing freely relative to the rotation shaft. The operating lever has an upward arm and a downward arm, and is fixed to the rear swinging arm, and during the swinging of both swinging arms from the open position to the closed position, comes into contact with the downward arm and causes the front swinging arm to swing. It is equipped with a pushing piece that pushes in the same direction as the moving direction, and a transmission means that transmits the swing of the actuating lever based on the pushing of the pushing piece to the fluid pressure cylinder, so that it can be moved from the open position to the closed position. When the two swinging arms, which are currently swinging toward the front, reach the latter stage of their swinging motion, the pushing piece comes into contact with the downward arm of the operating lever and pushes it forward, and as a result, the operating lever moves forward. The swing arm swings in the same direction as the swing direction (counterclockwise in Figure 2), but the swing is transmitted to the fluid pressure cylinder by the transmission means, and the fluid pressure cylinder swings together with the movable engagement member. The movable engagement member is then engaged with the fixed engagement member.

Before sealing pressure is generated between both jaws when both engaging members are engaged, there is a gap (C in Fig. 2) that is larger than the thickness of the tube between both jaws.
When sealing pressure is generated, the gap is reduced and both swing arms fall inward (the state shown in FIG. 3). As a result, the pushing piece pushes the operating lever more than necessary, causing the operating lever to swing further,
Accordingly, the fluid pressure cylinder also tries to swing together with the movable engagement member, but since both engagement members are already engaged, the movable engagement member cannot swing. If this continues, an unreasonable force will be applied to the pushing piece, movable engagement member, etc., but the transmission means is a forward-retracting rod whose rear end is attached to the upward arm via a horizontal pin and extends forward, and which is perpendicular to the forward-retracting rod. a rod receiving plate which is fixed to the fluid pressure cylinder and through which the reciprocating rod can slide, a spring receiver provided at the front end of the retracting rod, and a rod receiving plate and the spring which are fitted into the retracting rod. Because it consists of a compression spring interposed between the receivers, when both swing arms fall inward with both engaging members engaged as described above, the operating lever can swing, but the hydraulic cylinder cannot swing, so the operating lever pulls out the reciprocating rod backward against the spring, thereby preventing unreasonable force from acting on the pushing piece, movable engagement member, etc.

Embodiments Embodiments of the present invention will now be described with reference to the drawings.

In this specification, "front and rear" means the side perpendicular to the paper surface of FIG. 4 and the other side is the front, and the side in front of it is the rear, and "left and right" means the left side of FIG. Define.

(A) Overview of the entire container forming apparatus As shown in Figs. 4 and 5, the container forming apparatus consists of a left half and a right half, which have the same configuration but are arranged in different directions. Each part includes a vertical rod 1 that can be raised and lowered and reversibly rotated; a lifting frame 2 that is attached to the vertical rod 1 so as to be raised and lowered together with the vertical rod 1 and to allow the vertical rod 1 to rotate reversibly;
A pair of front and rear swing arms 5 each supported by the elevating frame 2 so as to swing about a pair of mutually parallel horizontal axes at the lower part;
6, a pair of front and rear jaws 3, 4 fixed to the upper part of each swing arm 5, 6 so as to face each other, and a closed position where both jaws 3, 4 approach each other and a position where they are separated from each other. An arm opening/closing device that swings both swing arms 5 and 6 between open positions, and a press that draws both swing arms 5 and 6 toward each other in the closed position to generate sealing pressure between both jaws 3 and 4. Equipped with equipment. Note that of the left and right halves, only the right half will be described below.

Of the two jaws 3 and 4, although not shown, a heat sealing heater is embedded in the front jacket 3, and a cutter is embedded in the rear jacket 4, respectively.

The two elevating frames 2 are synchronously moved up and down alternately in different directions with predetermined strokes.
That is, when one of the elevating frames 2 rises,
The other lifting frame 2 is lowered. When the elevating frame 2 is at the upper limit position of its elevating stroke, both the jaws 3 and 4 close each other, so that the tube W is strongly pressed across a predetermined width and sealed. By lowering both the jaws 3 and 4 together with the elevating frame 2 while pressing the tube W, the tube W is sent by a length corresponding to one container. When the lifting frame 2 reaches the lower limit position, the cutter is activated and the tube W is cut at the center of the height of the seal width. Then, both jaws 3 and 4 open to release the tube W. As a result, a portion corresponding to one container at the tip of the tube W is separated from the other portions.

Above the jaws 3 and 4, although not shown in detail, a pair of front and rear split cylindrical movable molds 7 and a pair of left and right movable lug pieces 8 are provided, respectively. A roller 9 is attached to each movable press die 7, and as these rollers 9 move along the cam 10, the movable press die 7 swings in opposite directions about its lower end. The inner circumferential surface of the movable mold 7 in the mated state is formed in a shape similar to the outer circumferential surface of the final box-shaped container.
By pressing the tube W together with the movable press mold 7, one end of the tube W 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 contents of the tube W are Quantification is performed. The movable lug piece 8 has a substantially L-shaped cross section, and is moved in opposite directions around one side of its lower end by a horizontal retractable rod 11 provided at the top of the swing arms 5 and 6 and a rack and pinion (not shown). oscillate. A cam 12 and its follower 13 are connected to the protruding end of the horizontal reciprocating rod 11 for operating the same. The movable lug piece 8 cooperates with the movable mold 7 to form a protruding triangular lug at the end of the flat tube W.

(B) Vertical Rod As shown in detail in FIGS. 6a and 6b, the vertical rod 1 is rotatably and vertically supported by upper and lower bearings 14 and 15 at two locations near the upper end and lower end. vertical rod 1
A spline 16 is provided at the portion received by the lower bearing 15, and a collar 17 is provided following the upper end of the spline 16. The upper bearing 14 has inner and outer rings 18,1
9 and two upper and lower ball bearings 20 interposed between both wheels 18 and 19.
The inner ring 18 is connected to the vertical rod 1 through the bush 21.
The outer cylinder 19 is slidably fitted onto the outer cylinder 19, and the outer cylinder 19 is fixed to a frame (not shown). Lower bearing 15
consists of two upper and lower ball bearings 24 interposed between inner and outer rings 22, 23 and both rings 22, 23. Inner ring 22 is spline 16
The vertical rods 1 are fitted together so that the vertical rods 1 rotate together with the inner ring 22. Inner ring 2
An arm 25 is fixed to the lower end of the arm 25, and one end of a rod 26 extending from a cam mechanism, which will be described later, is connected to the tip of the arm 25. Outer ring 23
is fixed to the frame 27. At the lower end of the vertical rod 1 protruding downward from the lower bearing 15, there is a vertical rod-shaped connecting member 2 in line with the lower end.
8 is fixed, and a horizontal rod-shaped member 29 is attached to the connecting member 28 orthogonally to the bushing 30.
It is installed through. A pair of vertical parallel rods 31 are provided at both ends of the horizontal rod-shaped connecting member 29.
The lower ends of the two are connected to each other, and the upper ends thereof are connected to a cam mechanism via a frame-like connecting member 32.

(C) Elevating Frame As shown in detail in FIGS. 6a and 9, the elevating frame 2 is integrally provided with a vertical cylindrical portion 33 via a connecting portion 34 at an intermediate portion of its outer circumferential length. It consists of a pair of left and right opposing walls 35 and 36. The vertical cylindrical portion 33 is fitted onto the vertical rod 1 via a pair of upper and lower bushes 37 and 38, and is received by the collar 17 thereof. Two through holes 39 and 40 are formed in each of the opposing walls 35 and 36 at a predetermined interval in the front-rear direction. Bearings 41 are fitted into each of the through holes 39 and 40, and these bearings 41
A pair of front and rear horizontal support shafts 42, 43 are supported across the left and right opposing walls 33, 36. Of both opposing walls 35 and 36, the right opposing wall 3
A pair of front and rear rollers 44 are provided on the outer surface of the lift frame 6, and these rollers 44 sandwich a vertical guide rail 46 provided on a column 45 from both front and rear sides, thereby preventing the lifting frame 2 from rotating. (See Figure 4). Further, a lid 47 which also serves as a bearing holder is provided at the open end of each of the through holes 39 and 40.

(D) Swinging arm Both swinging arms 5 and 6 have their lower ends fixed to a pair of horizontal support shafts 42 and 43 in the front-rear direction, as shown in FIGS. 6a, 9 and 10. Oblate rectangular parallelepiped blocks 48, 49 with thickness
, horizontal bars 50 and 51 placed on the tops of blocks 48 and 49 so that the left half of their lengths protrude to the left of blocks 48 and 49;
It consists of prismatic blocks 52 and 53 with a substantially square cross section suspended from the lower surfaces of the protrusions 0 and 51. A pair of jaws 3 and 4 are fixed to opposing surfaces of both prismatic blocks 52 and 53 in a protruding manner, respectively.

(E) Arm opening/closing device Referring to FIGS. 6a, 7, and 8, the arm opening/closing device controls the reversible rotation of the lifting rod 1, which is reversibly rotated by a cam mechanism described later. This converts the swinging of the arms 5 and 6, and one end is connected to the middle of the height of the oblate rectangular parallelepiped blocks 48 and 49 of both swinging arms 5 and 6 via a horizontal pin 56 and a spherical bearing 57, respectively. A pair of left and right rods 54 and 55 are connected. The other ends of the rods 54 and 55 are provided with a vertical pin 59 and a spherical bearing 60 on both sides of the rotation center of the horizontal rotating body 58, respectively.
are connected via. The horizontal rotating body 58 is fitted and keyed to the vertical rod 1 at the center of rotation so as to press down the vertical cylindrical part 33 of the lifting frame 2 from above, and a bag is fitted onto the vertical rod 1 from above the horizontal rotating body 58. A nut 61 is placed and tightened on the vertical rod 1, thereby fixing the horizontal rotating body 58 to the vertical rod 1.

When the vertical rod 1 is raised or lowered, the lifting frame 2 is raised or lowered together with the horizontal rotating body 58 accordingly. On the other hand, when the vertical rod 1 is reversibly rotated, the horizontal rotary body 58 rotates in the same direction together with the vertical rod 1, and the pair of rods 54 and 55 connected thereto rotate both swing arms 5 and 58. , 6 swing between a closed position in which they are mutually upright and an open position in which they are tilted upwardly.

(F) Press device Referring to FIG. 1, FIG. 2, and FIG. It includes a pair of left and right fixed engagement members 63 having recesses 62, and a movable engagement member 64 having a downward engagement protrusion 65 that is engaged with the engagement recess 62 of each fixed engagement member 63. Each movable engagement member 64 is attached to a piston rod 67 of a hydraulic cylinder 66, as shown in detail in FIGS. 10 and 11. The fluid pressure cylinder 66 is connected to the prismatic block 52 of the front swing arm 5.
They are integrally provided at both ends of a horizontal main rotation shaft 69 which passes through the block 52 and is rotatably supported by the block 52 via a pair of bushes 68. The fluid pressure cylinder 66 has a piston rod 6
A double compression coil spring 70 that biases the main rotation shaft 6 in the direction of protrusion is built in, and a through hole 71 that communicates both the fluid pressure cylinders 66 is connected to the main rotation shaft 6.
9 in the axial direction. Of both the left and right fluid pressure cylinders 66, a hollow sub-rotation shaft 72 for supplying working fluid is attached to the right side of the right fluid pressure cylinder 66, and a flange 73 provided at its left end is bolted to the main rotation shaft. It is fixed concentrically with the shaft 69. The sub-rotation shaft 72 is the front swing arm 5
It passes through the upper part of the oblate rectangular parallelepiped block 48 and is rotatably supported by the block 48. The connector 7 is connected to the right protruding end of the sub-rotation shaft 72.
4 is attached, and a hydraulic oil pipe (not shown) is connected to this. The operating lever 7 is attached to the sub-rotating shaft 72 so as to be in contact with the flange 73 thereof.
5 is installed. The operating lever 75 includes a boss 77 that is rotatably fitted to the sub-rotating shaft 72 via a pusher 76, a downward arm 78 that projects downward from the boss 77, and a forward arm 79 that projects forward from the boss 77. boss 77
It has a bifurcated upward arm 80 that protrudes further upward. A roller 81 is attached to the tip of the downward arm 78. A horizontal rectangular flat plate-shaped pushing piece 82 is fixed to the rear swinging arm 6 so as to be located behind the roller 81 . The tip of the pushing piece 82 is formed in an upwardly inclined shape, and this causes the roller 8 to move in the latter half of the swinging movement of both the swinging arms 5 and 6 from the open position to the closed position.
1 and rotates the operating lever 75 counterclockwise in FIG. One end of a tension coil spring 83 is hooked to the tip of the forward arm 79. The other end of the spring 83 is hooked to the left end surface of the front swing arm 5 at a position below the operating lever 75, and the spring 83 causes the operating lever 75 to rotate clockwise in FIG. Forced. upward arm 80
One end of the reciprocating rod 84 is attached to the horizontal pin 8.
They are connected via 5. A step 86 is formed in the middle of the length of the advance/retreat rod 84, and
A small diameter portion 87 is formed from the step 86 to the other end. On the other hand, among both fluid pressure cylinders 66,
A rectangular flat rod receiving plate 88 is fixed to the front surface of the right hydraulic cylinder 66 so that its right half protrudes from the hydraulic cylinder 66 to the right. 87 slidably passes through the bush 89, and the step 86 abuts the rear surface of the rod receiving plate 88. A spring receiver 90 is fixed to the other end of the reciprocating rod 84, and a compression coil spring 91 fitted in the small diameter portion 87 is interposed between the spring receiver 90 and the rod receiving plate 88.

Assume that both swing arms 5 and 6 are now swinging from the open position toward the closed position. At this time, the movable engagement member 64 is maintained in an upward position inclined forwardly upward from the state perpendicular to the front swing arm 5, as shown by the chain line in FIG. Eventually, when both swing arms 5 and 6 reach the vicinity of the closed position, the pushing piece 82 comes into contact with the roller 81 and pushes it. Then, the operating lever 7
5 rotates counterclockwise in FIG.
8, but the compression coil spring 91 prevents this, and this spring 91 causes the rod receiving plate 88 to move back together with the fluid pressure cylinder 66 around the main and sub rotation axes 69, 72. Rotate clockwise. As a result, the movable engagement member 64 rotates together with the fluid pressure cylinder 66, changes from an upward position to a horizontal position, and is engaged with the fixed engagement member 63. In this state, when the hydraulic cylinder 66 is supplied with working fluid and the piston rod 67 is retracted, the movable engagement member 64 moves forward together with the piston rod 67, and both the engagement members 63 and 64 are attracted to each other. A sealing pressure is generated between the jaws 3 and 4. When both the engaging members 63, 64 engage with each other, there is a slight gap C between the two jaws 3, 4, but when both the engaging members 63, 64 are drawn together, the gap C disappears. . In this case, both swing arms 5 and 6 will fall slightly inward from their upright state (see FIG. 3). At this time, in order for the movable engagement member 64 to maintain its horizontal position, it is necessary for the movable engagement member 64 to be in a slightly upward position with respect to the front swing arm 5. By compressing and relatively rotating the fluid pressure cylinder 66 and the actuating lever 75 in opposite directions, the posture can be changed.

(G) Cam mechanism Figures 12 to 14 show a cam mechanism for raising and lowering the vertical rod 1 and reversibly rotating it.

A horizontal cam shaft 92 extending in the left-right direction is supported by a bracket 93 so as to be located diagonally below the lower end of the vertical rod 1. The camshaft 92 has sprockets 94, 2 in order from right to left.
Two rod lifting plate cams 95, 96 and one rod rotating plate cam 97 are fixed (left and right are shown reversed in FIG. 13).
The two rod lifting plate cams 95 and 96 have different cam contours, and each cam contour corresponds to the stroke amount of the lifting frame 2. Two rod lifting plate cams 95, 96
One common rod lifting cam follower 9
8, one rod rotation plate cam 97 is provided with another rod rotation cam follower 99, respectively. Cam follower 98 for rod lifting
is a piece of groove-shaped steel having an inverted U-shape in cross section, and has a top wall 100 and left and right side walls 10.
1 and 102, and extends in the front and rear direction over the two rod lifting cams 95 and 96, and has a bracket 93 at the rear end.
The rectangular frame-shaped connecting member 32 described above is attached to the front end of the horizontal shaft 103 so as to be adjustable in length. A projecting ear 104 is integrally provided on the upper surface of the mid-length portion of the top wall 100, and a rod 105 of a fluid pressure cylinder for follower restraint is connected to this projecting ear 104. 1st
As shown in FIG. 3 and FIG. 15, both walls 10
A pair of parallel guide rods 106 at the front and rear are fixed across the guide rods 1 and 102, and a movable piece 107 is supported by these guide rods 106. A roller 108 is connected to the horizontal pin 107 on the movable piece 107.
It is attached in a downwardly protruding manner through the
Piston rod 1 of thin fluid pressure cylinder 110
11 is connected to the right side of the movable piece 107. The hydraulic cylinder 110 is attached to the outer surface of the right side wall 102, and the piston rod 111 passes through the right side wall 102. As shown in FIG. 14, the rod rotation cam follower 99 has an L shape when viewed from the front, and has a boss 113 supported by another horizontal shaft 112 provided on the bracket 93.
, a forward protruding arm 114 extending forward from the boss 113 , and two upwardly protruding arms 115 and 116 extending upward from the boss 113 . A roller 117 is attached to the tip of the forward protruding arm 114, and this is in contact with the rod rotation plate cam 97. The other end of the rod 26 whose one end is connected to the arm 25 is connected to one of the two upwardly projecting arms 115, 116, and the piston rod 119 of the follower restraining hydraulic cylinder 118 is connected to the other end.

When the camshaft 92 rotates, its rotational motion is
It is converted into a reciprocating motion by either of the two rod lifting cams 95, 96 and the cam follower 98, and is transmitted to the vertical rod 1.
goes up and down. The vertical stroke of the vertical rod 1 corresponds to the length of one container of the tube W, so when changing the length,
The thin fluid pressure cylinder 110 is actuated to move the movable piece 107 so that the roller 108 that moves together changes from contacting one of the two plate cams 95 and 96 to contacting the other. Bye. On the other hand, the rotational motion of the camshaft 92 is converted into a reciprocating motion by the rod rotation cam 97 and its follower 99, and is transmitted to the rod 26, so that the rod 26 reciprocates in its length direction. Then, the arm 25 connected to the rod 26 swings, and the vertical rod 1 reversibly rotates together with the inner ring 22.

Effects of the Invention According to the present invention, when the fluid pressure cylinder is operated so that the piston rod moves in and out while both engaging members are engaged, both swing arms are drawn toward each other via both engaging members. This generates sealing pressure between both jaws, so the mechanism for generating the sealing pressure is simple and the movable parts that move together with the lifting frame are relatively small.

When both swinging arms, which are swinging from the open position toward the closed position, reach the latter stage of their swinging motion, the pushing piece contacts the downward arm of the operating lever and pushes it forward. As a result, the operating lever is swung in the same direction as the front swiveling arm.
The oscillation is transmitted to the fluid pressure cylinder by the transmission means, the fluid pressure cylinder oscillates together with the movable engagement member, and the movable engagement member is engaged with the fixed engagement member, so that both engagement members are engaged with each other. can be done reliably.

If both swing arms fall inward with both engaging members engaged, the actuating lever can swing, but since both engaging members are already engaged, the hydraulic cylinder cannot swing. Since this is not possible, the operating lever pulls out the advancing/retracting rod backwards against the spring, thereby preventing excessive force from acting on the pushing piece, movable engagement member, etc. No unreasonable force is applied to the movable engagement member, etc., and reliable sealing is ensured.

[Brief explanation of drawings]

The drawings show embodiments of the present invention, and FIG. 1 is a perspective view of an engaging member, a fluid pressure cylinder, an operating lever, a pushing piece, etc. showing the main parts of the invention, and FIGS.
Each figure is an explanatory diagram of the operation of each of the above members. FIG. 4 is a rear view showing almost the entire container forming apparatus, and FIG. 5 is a left side view of the right half of the apparatus as indicated by the - line in FIG. 4. Figures 6a and 6b are enlarged sectional views taken along the - line in Figure 5, Figure 7 is a side view of the swing arm, lift frame, etc. taken along the - line in Figure 6a, and Figure 8 is a side view taken along the - line in Figure 6a. FIG. 9 is a plan view showing the arm opening/closing device along with a cross section of the swinging arm, and FIG. 9 is a perspective view of the portion shown in FIGS. 6a and 6b to FIG. 8. 10 is a rear view of the front swinging arm including a fractured cross section along the line - in FIG. 7, and FIG. 11 is a horizontal sectional view of the front swinging arm along the line XI--XI of FIG. Fig. 12 is a front view of the cam mechanism, and Fig. 13 is the − of Fig. 12.
FIG. 3 is a vertical cross-sectional view of the cam mechanism along the line. 14th
The figure is a cross-sectional view of the cam mechanism taken along the line - in FIG. 13, and FIG. 15 is a partially enlarged sectional view of the cam follower taken along the line - in FIG. 12. 2... Lifting frame, 3, 4... Jiyo, 5,
6... Swing arm, 42, 43... Support shaft, 62
...Engagement recess, 63...Fixed engagement member, 64...
Movable engagement member, 65... Engagement convex portion, 66... Fluid pressure cylinder, 67... Piston rod, 69,7
2... Rotating shaft, 75... Operating lever, 78... Downward arm, 80... Upward arm, 82... Pushing piece, 84... Advance/retreat rod, 85... Horizontal pin,
88...Rod receiving plate, 90...Spring receiving plate, 91
...Compression spring, W...Tube.

Claims (1)

[Scope of Claims] 1. A container forming device for sandwiching and sealing a content filling tube W in lengths corresponding to one container, and cutting the middle part of the sealing width, comprising: an elevating frame 2; , a pair of parallel horizontal support shafts 42 at the front and rear at the bottom;
A pair of front and rear swinging arms 5 and 6 are attached to the lifting frame 2 at 43, a pair of jyos 3 and 4 are fixed to the upper portions of the two swing arms 5 and 6 so as to face each other, and both jyoes 3 , 4, and an arm opening/closing device for swinging both swinging arms 5 and 6 between a closed position where the swinging arms 5 and 4 approach each other and an open position where they are separated from each other; A press device that generates a sealing pressure between the two swing arms 3 and 4, and the press device is provided on the rear swing arm 6 so as to protrude between the two swing arms 5 and 6, and the press device is installed in an upward direction. Engagement recess 62
a fixed engagement member 63 having a downward engagement convex portion 65 that engages with the engagement recess 62;
a movable engagement member 64 having a movable engagement member 64; and a piston rod 67 to which the movable engagement member 64 is attached; an actuating lever 75 which is attached to the rotation shafts 69 and 72 so as to be able to swing therewith and has an upward arm 80 and a downward arm 78, and which is fixed to the rear swing arm 6 and A pushing piece 82 that comes into contact with the downward arm 78 and pushes it forward while the swinging arms 5 and 6 are swinging from the open position to the closed position; and an operation based on the pushing of the pushing piece 82. It is equipped with a transmission means for transmitting the swinging motion of the lever 75 to the fluid pressure cylinder 66, and the transmission means is a reciprocating rod 8 whose rear end is attached to an upwardly facing arm 80 via a horizontal pin 85 and extends forward.
4, a rod receiving plate 88 which is fixed to the hydraulic cylinder 66 so as to be orthogonal to the forward/backward rod 84 and through which the forward/backward rod 84 is slidable; and a spring receiver 90 provided at the front end of the forward/backward rod 84. And, the rod receiving plate 88 is fitted into the advancing/retracting rod 84.
The compression spring 9 interposed between the spring receiver 90 and the spring receiver 90
1. A container forming device in a packaging machine, comprising: