JPH0340591Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is arranged at the sending end of a film transfer path through which a film made of thermoplastic synthetic resin film is intermittently transferred, and when the film stops being transferred, This invention relates to a cutting device that cuts raw fabric to form bags.

(Prior Art) In this type of cutting device, the lower blade is attached to a fixed holder disposed below the original fabric transfer path, and the upper blade, which faces the lower blade so as to be able to approach and separate from the original fabric, It is attached to a movable holder that is movable up and down above the transfer path. Further, due to the rotational movement of an eccentric cam disposed around the axis of the drive shaft, the upper blade integrally with the movable holder is separated from the bottom dead center position where it joins the lower blade and above the lower blade. It has generally been configured to be raised and lowered in a constant stroke between opposing top dead center positions.

(Problem to be solved by the invention) As is well known, the original fabric that is intermittently transferred along the original fabric transfer path is sealed at a predetermined pitch by a sealing device and then cut by a cutting device. , a single bag is usually formed.

Further, as described above, the original fabric sealed at a predetermined pitch may be wound into a roll in a continuous state without being cut by a cutting device.

When winding up the original fabric sealed at a predetermined pitch into a roll, the upper blade is removed from the movable holder in advance. However, the work of removing the upper blade from the movable holder is troublesome and dangerous. Furthermore, the work of reattaching the removed upper blade to the movable holder is also dangerous, and the blade alignment with the lower blade must also be adjusted, which also requires a lot of effort. There was a problem.

(Means for solving the problem) Therefore, in this invention, a fixed holder to which a lower blade is attached is disposed below the feeding end of the fabric transfer path where the fabric is intermittently transferred. A movable holder on which an upper blade that faces the lower blade so as to be able to approach and separate is attached to the upper end of the blade is movable up and down, and this movable holder is connected to one end of the lift lever via a link rod in the vertical direction. On the other hand, the upper blade is moved integrally with the movable holder by reciprocating the interlocking rod by the rotational movement of an eccentric cam disposed around the axis of the drive shaft and swinging the lifting lever in the vertical direction. The cutting device is a cutting device that cuts the raw fabric by raising and lowering the raw fabric and lowering the raw fabric to a bottom dead center position where the upper blade is joined to the lower blade when the conveyance of the raw fabric is stopped, and one end of the interlocking rod has the An outer ring rotatably fitted to the outer periphery of the eccentric cam is disposed, the other end of the interlocking rod is pivotally connected to the lift lever, and the interlocking rod is rotated in the rod direction by a main interlocking rod and a sub-interlocking rod. Between the main interlocking rod and the sub-interlocking rod, the sub-interlocking rod is pushed out in the extension direction with respect to the main interlocking rod so that the upper blade at the bottom dead center comes into contact with the lower blade. The structure includes an actuating cylinder that raises the blade to a non-cutting position.

(Function) Therefore, this invention, when continuously winding up a raw fabric sealed with a predetermined pitch into a roll, by pushing out the sub-interlocking rod in the elongation direction with respect to the main interlocking rod using the actuating cylinder, The upper blade is raised to the non-cutting position together with the movable holder via the lift lever and link rod. In this state, even if the rotational movement of the eccentric cam on the drive shaft reciprocates the main and sub linking rods and raises and lowers the upper blade integrally with the movable holder via the elevating lever and the link rod, the upper blade is The material does not come into contact with the lower blade, so the material can be continuously wound into a roll without being cut.

(Example) An example of this invention will be described below with reference to the drawings.

In FIG. 3, which shows the bag making machine from the side, the raw fabric F made of thermoplastic synthetic resin film is intermittently transferred along the raw fabric transfer path from the feeding side on the right side of the figure to the feeding side on the left side. .

A first feeding device 1 is provided on the feeding side of the fabric transfer path.
is installed. The first feeding device 1 includes a plurality of endless belts 4, each of which is stretched between pairs of large and small rollers 2 and 3 that face each other on the upper and lower sides of the original fabric transfer path. The large-diameter roller 3 is rotated as the sector gear 49 rotates in the feeding direction, thereby driving the feeding belt 4, thereby moving the raw fabric F forward by a length corresponding to the bag. (to the left in FIG. 3).

In front of the first feeding device 1, a sealing device 5 is provided which includes a pair of upper and lower electric heating coil-type heating sealing bodies 6 and 7 that are movably opposed to each other above and below the material transfer path.
is installed. These upper and lower heat sealing bodies 6 and 7 are moved up and down by a lifting mechanism using a cam, and when the transfer of the original fabric F is stopped, they come into contact with the original fabric F in between, and thereby The anti-F sealing area is heated and sealed.

A feed guide roller mechanism 30 is disposed in front of the sealing device 5 described above. As shown in FIG. 4, this feed guide roller mechanism 30 is rotatably supported between frames facing above and below the material transfer path, and is continuously rotationally driven by a dedicated motor (not shown). A pair of upper and lower roller shafts 31,
32, and a large number of disc-shaped feed rollers 33, 34 arranged vertically alternately at predetermined intervals in the axial direction on the axes of these roller shafts 31, 32. When transporting the original fabric, a first feeding device 1 is provided between the outer peripheries of the upper and lower feed rollers 33, 34, which are rotated together with the upper and lower roller shafts 31, 32, and the upper and lower surfaces of the original fabric F. In the section between the feed guide roller mechanism 30 and the feed guide roller mechanism 30, a frictional force is generated that does not stretch the sealed portion of the raw fabric F that has been heat-sealed by the sealing device 5. The original fabric F is transported forward without causing any slack in the original fabric F.

In front of the feed guide roller mechanism 30, there is a first guide that transports and guides the fabric F sent out by the feed guide roller mechanism 30 in a state where the fabric F is slackened by a predetermined amount. A roller 35 is rotatably disposed between the frames. In front of this first guide roller 35, the first guide roller 35
A second guide roller 36 is rotatably disposed between the frames in substantially the same plane as the frame.

Both the first and second guide rollers 35 and 36
A pair of lower fixed cooling pedestals 37 and an upper water-cooled movable cooling body 38 are disposed in between, which are opposed to each other above and below the original fabric transfer path. This movable cooling body 3
8 is raised and lowered in synchronization with the upper heated sealing body 6, and when the transfer of the raw fabric F is stopped, it descends toward the upper surface of the fixed cooling pedestal 37, and actively cools the heated sealed portion of the raw fabric F. It's like a summer.

In front of the second guide roller 36, a third guide roller 39 and a fourth guide roller 41 are arranged via a first adjustment roller 40 that is vertically adjustable.
Further, in front of the fourth guide roller 41, a fifth guide roller 42 and a sixth guide roller 44 are disposed via a second adjustment roller 43 which is vertically adjustable. A second feeding device 4 is provided on the feeding side of the original fabric transfer path located in front of the sixth guide roller 44.
5 are arranged. This second feeding device 45
In almost the same manner as the first feeding device 1, there are a pair of large and small rollers 46, which face each other on the upper and lower sides of the original fabric transport path.
A large number of endless feed belts 48 are stretched between the belts 47. And a large diameter roller 46
is rotated in accordance with the rotation of the sector gear 49 in the feeding direction, which will be described later, thereby driving the feeding belt 48, thereby directing the raw fabric F toward the cutting device 86 in front by a length corresponding to the bag. It is about to be transferred.

A fan-shaped gear 49 that intermittently drives the first and second feeding devices 45 to intermittently transport the original fabric F is supported at a predetermined position of the frame so as to be able to swing around a support shaft 50 at its base. There is.

The sector gear 4 is located below the raw fabric transfer path and
9, between the frames there is a chain 5
A feed drive shaft 52 and a driven shaft 5 linked by
3 are rotatably arranged at a predetermined interval in the front-rear direction. A pinion 54 is disposed around the feed drive shaft 52 and rotates while meshing with the sector gear 49. Furthermore, the first feeding device 1
The roller shaft of the second feeding device 45 is connected to the driven shaft 53 by a first torque transmission mechanism 55 using a chain function, and the roller shaft of the second feeding device 45 is connected to the drive shaft 52 by a second torque transmission mechanism 55 using a chain mechanism. They are linked by a mechanism 56. On one shaft 55a of the first torque transmission mechanism 55 and on one shaft 56 of the second torque transmission mechanism 56, a sector gear 49 rotates in the clockwise feeding direction in FIG. A pair of electromagnetic clutches and an electromagnetic brake are provided, respectively, which transmit the torque when the rotation is made, and cut off the torque transmission when the rotation is made in the counterclockwise non-feeding direction. The on/off operations of these electromagnetic clutches and electromagnetic brakes are performed by a switch actuator provided on the crankshaft 58 and a corresponding actuator switch, which will be described below.

The sector gear 49 is oscillated by a crank mechanism 57. A drive shaft 58 of this crank mechanism 57 is rotatably supported between frames. A crank lever 59 that rotates together with the drive shaft 58 is fitted on the base of the drive shaft 58 . and crank lever 5
9 and the sector gear 49 are connected by a connecting rod 60.

The drive shaft 58 of the crank mechanism 57 includes an unequal speed ratio transmission mechanism 74, a reduction gear 69, and a control shaft 64.
The output shaft 6 of the drive motor 61, which is the drive source, is connected to the
It is connected to 2.

Note that the unequal speed ratio transmission mechanism 74
The output shaft 6 of the drive motor 61 is configured such that the rotation of the drive motor 61 in the non-feeding direction is decelerated, and the rotation in the feeding direction is accelerated.
The torque of 2 is transmitted to the drive shaft 58 of the crank mechanism 57.

A cutting device 86 is disposed at the feeding end of the fabric transfer path in front of the second feeding device 45 . In this cutting device 86, referring to FIGS. 1 and 2, a fixed holder 87 fixed to the frame is disposed below the feeding end of the original fabric transfer path. The lower blade 87a is removably attached with a bolt or the like.

A movable holder 88 supported by a frame so as to be movable up and down is disposed above the sending end of the material transfer path, and this movable holder 88 has an upper blade 88a facing the lower blade 87a so as to be movable toward and away from the lower blade 87a. is removably attached with bolts or the like.

The upper movable holder 88 is supported so as to be movable up and down by a vertical guide rod 89 that is slidably fitted into a guide tube fixed to the frame. The lower end of this guide rod 89 is connected to one end of an L-shaped lifting lever 91 via a link rod 90. The lift lever 91 has a center portion thereof.
It is supported by a frame so as to be rotatable about an axis 92.

On the other hand, a disk-shaped eccentric cam 93 is disposed on the axis of the drive shaft 58 in a state that it is eccentric from the axis by a predetermined amount. The other end of an interlocking rod 95 having an outer ring 94 rotatably fitted around the outer periphery of the eccentric cam 93 at one end is pivotally connected to the other end of the elevating lever 91. After the second feeding device 45 has transferred the raw fabric F by a length corresponding to the bag, while the feeding action of the second feeding device 45 is stopped, the movable holder 88 is Blade 88a
is lowered toward the lower blade 87a of the fixed holder 87 to cut the original fabric F.

As shown in FIG. 1, the interlocking rod 95 can be expanded and contracted in the rod direction by a main interlocking rod 96 and a sub-interlocking rod 97 that is fitted in the distal end of the main interlocking rod 96 so as to be movable in the axial direction. It is configured. On the outer periphery of the tip of the main interlocking rod 96, an operating cylinder 98 made of a double-acting air cylinder is rotatably supported at its base about a pin 99 as a fulcrum. The tip of the rod 98a of the actuating cylinder 98 is connected to an interlocking piece 100 protruding from the outer periphery of the sub-interlocking rod 97 by a pin 101. By filling compressed air into one cylinder chamber of the operating cylinder 98, the main interlocking rod 96 is retracted to the shortened end where the flange formed on the outer periphery of the sub-interlocking rod 97 comes into contact with the tip surface of the main interlocking rod 96. held. In this state, the upper blade 88a of the movable holder 88 is moved up and down together with the movable holder 88, so that the upper blade 88a of the movable holder 88 approaches and separates from the lower blade 87a of the fixed holder 87, so that the original fabric F is cut. It's summery.

Furthermore, by filling the other cylinder chamber of the operating cylinder 98 with compressed air and pushing out the sub-interlocking rod 97 to the extended end with respect to the main interlocking rod 96, the elevating lever 91 and the linking rod can be moved as shown in FIG. The upper blade 88a is raised integrally with the movable holder 88 via the movable holder 88 to a non-cutting position at a height where it does not come into contact with the lower blade 87a of the fixed cutter 89. That is, in this state, the rotation of the drive shaft 58 causes the eccentric cam 93, the main and sub linking rods 96, 9 to
7. The upper blade 8 is integrated with the movable holder 88 via the lifting lever 91, the link rod 80 and the guide rod 89.
Even when the upper blade 8a is raised and lowered, the upper blade 88a is raised and lowered above the non-cutting position at a height where it does not come into contact with the lower blade 87a of the fixed holder 87.

In addition, in this embodiment, when using the original fabric F on which letters, pictures, etc. are printed at a predetermined pitch on the surface, the printed parts of this original fabric F are detected to prevent the stickers from shifting or cutting of the original fabric F. As shown in FIG. They are arranged on the sending side and the sending side, respectively. Each of these sensors 10
2, 103 is adapted to detect the printed portion of the original fabric F every time the original fabric F is intermittently transported by a predetermined length by the first and second feeding devices 1 and 45. A first torque transmission mechanism drives the first feeding device 1 based on a detection signal of the printed portion of the fabric F by a sensor 102 disposed on the fabric feeding side of the first feeding device 1. By turning off the electromagnetic clutch (not shown) disposed on the shaft of 55 and turning on the electromagnetic brake, the fabric feeding action of the first feeding device 1 is stopped, thereby preventing the seal deviation of the fabric F. is now being prevented.

In addition, the shaft of the second torque transmission mechanism 56 that drives this feeding device 45 is detected by the detection signal of the printed portion of the fabric F by the sensor 103 disposed on the fabric feeding side of the second feeding device 45. An electromagnetic clutch (not shown) disposed above is turned off and an electromagnetic brake is turned on, thereby stopping the web feeding action of the second feeding device 45, thereby preventing miscutting of the web F. It is becoming more and more common.

In this embodiment configured as described above, when the drive motor 61 is actuated, the control shaft 64,
The drive shaft 58 is rotated at reduced speed and increased speed via the speed reducer 69 and the unequal speed ratio transmission mechanism 74.

When the drive shaft 58 rotates at an increased speed, the sector gear 49 is rotated at an increased speed in the clockwise feeding direction in FIG. 49
is decelerated and rotated in the non-feeding direction, which is the opposite direction to the above.

The rotation of the sector gear 49 at increased speed in the feed direction rotates the feed drive shaft 52, and also rotates the driven shaft 53, which is linked to the feed drive shaft 52 by the chain 51. Then, the first feeding device 1 is driven via the first torque transmission mechanism 55, and the second feeding device 45 is driven via the second torque transmission mechanism 56, whereby the web F is moved at a high speed. The length corresponding to the large bag is transferred. Further, the feed guide roller mechanism 30 is driven by a dedicated motor, and sagging of the original fabric F between the first feed device 1 and the feed guide roller mechanism 30 is prevented.

When the sector gear 49 decelerates and rotates in the non-feeding direction, the electromagnetic clutches disposed on the shafts 55a and 56a of each of the first and second torque transmission mechanisms 55 and 56 are turned off and the electromagnetic brake is turned on. Therefore, the feeding action of the first and second feeding devices 1 and 45 is stopped. During this time, the sealed portion of the original fabric F is heat-sealed by the sealing device 5.

On the other hand, due to the rotational movement of the eccentric cam 93 that is rotated together with the drive shaft 58, the interlocking rod 96 is reciprocated, and the elevating lever 91 is swung vertically about the shaft 92. With this, the link rod 90
The upper blade 88a is raised and lowered together with the movable holder 88 through the movable holder 88. Then, the first and second feeding devices 1 and 4
5 is stopped and the transfer of the original fabric F is stopped, the upper blade 88a of the movable holder 88 touches the fixed holder 8.
It is lowered to the bottom dead center position where it joins the lower blade 87a of No.7. As a result, the cut portion of the original fabric F is cut to form a single bag.

In this way, the raw fabric F that is intermittently transferred along the raw fabric transfer path is sealed at a predetermined pitch by the sealing device 5, and then cut at a predetermined pitch by the cutting device 86 into individual bags. is formed intermittently.

Next, when the original fabric F sealed at a predetermined pitch by the sealing device 5 is to be continuously wound, the actuating cylinder 98 is actuated to push out the sub-interlocking rod 97 relative to the main interlocking rod 96. 96 and sub-interlocking rod 9
The interlocking rod 95 constituted by 7 is extended to a predetermined length and held. Then, as shown in Figure 2,
The lifting lever 91 is rotated clockwise, and the upper blade 88a is integrally moved with the movable holder 88 via the link rod 90.
is raised to the non-cutting position and held in this position.

In this state, the drive system of the bag making machine is operated. Then, as described above, due to the rotational movement of the eccentric cam 93 of the drive shaft 58, the movable holder 8 is moved through the interlocking rod 96, the elevating lever 91, and the link rod 90.
The upper blade 88a of No. 8 is moved up and down.
8a is raised and lowered above the non-cutting position at a height where it does not come into contact with the lower blade 87a of the fixed holder 87. Therefore, the raw fabric F sealed at a predetermined pitch by the sealing device 5 and sent out toward the cutting device 86 by the second feeding device 45 continues without being cut by the cutting device 86.
It is continuously wound up by a winding roller device 104 arranged in front of the cutting device 86.

(Effects of the invention) As described above, according to this invention, when the raw material sealed at a predetermined pitch is continuously wound into a roll, the sub-interlocking rod is moved relative to the main interlocking rod by the actuating cylinder. By pushing out in the extension direction, the upper blade is raised to the non-cutting position together with the movable holder via the lift lever and link rod. In this state, even if the rotational movement of the eccentric cam on the drive shaft reciprocates the main and sub linking rods and raises and lowers the upper blade integrally with the movable holder via the elevating lever and the link rod, the upper blade is does not touch the lower blade. Therefore, unlike the conventional method, it is possible to eliminate the trouble of removing the upper blade from the movable holder and then reattaching it again, as well as the danger associated with the work of attaching and detaching the upper blade.

[Brief explanation of drawings]

The drawing shows one embodiment of this invention.
The figure is a side view of the cutting device, and Figure 2 is a side view showing the movable holder raised to the non-cutting position.
FIG. 3 is a side sectional view showing the entire bag making machine, and FIG. 4 is a front view showing the feed guide roller mechanism. 1... First feeding device, 5... Sealing device, 4
5...Second feeding device, 58...Drive shaft, 86...
... Cutting device, 87 ... Fixed holder, 87a ... Lower blade, 88 ... Movable holder, 88a ... Upper blade, 90
... Link rod, 91 ... Elevating lever, 93 ... Eccentric cam, 94 ... Outer ring, 95 ... Interlocking rod, 96 ...
...Main interlocking rod, 97...Sub-interlocking rod, 98...Operating cylinder.

Claims (1)

[Scope of utility model registration request] A fixed holder to which a lower blade is attached is disposed below the sending end of the original fabric transfer path through which the original fabric is intermittently transferred, and a fixed holder on the upper side of the sending end faces the lower blade so as to be able to come into contact with and separate from the lower blade. A movable holder to which the upper blade is attached is arranged to be able to move up and down, and this movable holder is connected to one end of the up/down lever via a link rod in the vertical direction, while an eccentric By reciprocating the interlocking rod by the rotational movement of the cam and swinging the lifting lever in the vertical direction, the upper blade is raised and lowered together with the movable holder, and when the transfer of the raw material is stopped, the upper blade is moved up and down. The cutting device lowers the blade to the bottom dead center position where the blade is joined to the lower blade and cuts the raw material, and one end of the interlocking rod is provided with an outer ring that rotatably fits around the outer periphery of the eccentric cam. The other end of the interlocking rod is pivotally attached to the elevating lever, and the interlocking rod is configured to be extendable and retractable in the rod direction by a main interlocking rod and a sub-interlocking rod, and the main interlocking rod and the sub-interlocking rod An operating cylinder is disposed between the main interlocking rod and the main interlocking rod to push out the sub-interlocking rod in the extension direction to raise the upper blade at the bottom dead center position to a non-cutting position where it does not come into contact with the lower blade. A cutting device in a bag making machine characterized by: