JPS6229289B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a packaging apparatus, and more particularly, to a packaging apparatus including a slide arch or the like that can be freely inserted into and removed from the core hole, which is suitable for strapping and packing a cylindrical object to be packed having a core hole supported at a fixed position. The slide arch comprising a diameter detection mechanism for the object to be packed has a means for positioning the core hole of the object to be packed at a fixed position where the slide arch moves forward and backward, and the center of the core hole for automatically centering the object to be packed. This relates to the ejecting mechanism.

[Prior art and problems]

Several types of packaging devices for cylindrical objects having such a core hole have been proposed in the past, but the centering, that is, the position detection of the core hole cannot be automatically performed, and The centering mechanism shown in No. 55-38245 and whose main part is shown in FIG.
Although the details are unknown, both the receiving frame 71 on which the object to be packed W is placed and the holding frame 72 on the packing machine main body side are moved synchronously in opposite directions for positioning, and it is necessary for one packing process. This method had many drawbacks, such as taking a long time and hindering packaging efficiency.

【the purpose】

The present invention eliminates these conventional drawbacks, and is characterized by its compact configuration, instantaneous and accurate detection of the outer diameter of the object to be packed, and the ability to detect the outer diameter of the object to be packed based on this detected value. Packing of cylindrical objects that has a centering hole that allows the centering of the object, that is, the centering hole of the object to be packed to be connected to the bandway of the packing machine main body, and to position it facing the slide arch that moves forward and backward at a certain position. The object is to provide a centering mechanism in an apparatus.

【composition】

The structure of the present invention will be explained based on the illustrated embodiment.
0, slide arches 20 and 21 that communicate with the bandway 14 in the packing machine main body and are provided in fixed positions so as to be movable forward and backward, and objects to be packed that are provided below the slide arches so as to be movable up and down by a lift drive mechanism. Lifter 3 that supports the outer periphery in the longitudinal direction at appropriate intervals
0, the lifter 30 is inserted from above the machine frame 1.
A swinging rod 57 that supports the diameter detection lever 51, which is rotated by the object to be packed W entering upward, and is pivoted at a 2:1 point of the entire length is attached to the support plate. 57 and the diameter detection lever 51, and a reversal prevention mechanism 27 is provided on the swinging rod, and a correction rod 65 that moves up and down in conjunction with the lifter and can be freely depressed by the outer periphery of the object to be packed.
is provided at the center of the lifter 30, thus facing toward the center of the object to be packed, and a position detection means 60 is provided on the correction rod 65.
The position detecting means 60, which is attached to the lifter 30 and rises together with the lifter 30 when the lifter rises,
The present invention is characterized in that the lifting of the lifter is stopped in response to a signal generated when approaching or contacting the swinging rod 57.

[Effect]

Therefore, when the cylindrical object W to be packed is carried onto the lifter 30, the lower end of the diameter detection lever 51 rises, and one end 57b of the swinging rod 57 that interlocks with the diameter detection lever is moved to the lower end of the diameter detection lever 51. The other end 57a rotates by the same distance as the rising distance of the one end 57b.
Rotate half the distance. Furthermore, the correction rod 65 facing the center of the lifter 30 due to the size of the object to be packed is pushed down further by the lower surface of the outer periphery of the object to be packed, as the shorter diameter of the object to be packed increases due to the size of the object to be packed. The means 60 is similarly lowered and fixed in position around the outer periphery of the object to be packed. When the diameter detection lever 51 is pushed up by the object to be packed, the swinging rod 57 maintains the swinging position by the reverse rotation prevention mechanism 27 in conjunction with this. Next, when the lifter 30 is raised by the lifter 30 and the position detection means 60 provided on the correction rod 65 contacts the swinging rod 57, the lifter 30 is stopped by this signal, and the lifter 3
0 also stops rising, and the core hole WC of the object to be packed is fixed at a constant advance/retreat position of the slide arches 20, 21. That is, the correction rod 65 sets its original position based on the position of the core hole of the longest diameter that can be packed for the object to be packed,
If the object to be packed has a short diameter, the outer periphery of the object to be packed will be lower than the detected diameter from above the lifter 30 that supports the outer periphery of the object in the longitudinal direction at an appropriate interval. Add/correct the climbing distance by the amount.

【Example】

Hereinafter, details of the present invention will be explained based on illustrated embodiments. FIG. 1 shows the entire packaging apparatus having a centering mechanism according to the present invention. Reference numeral 1 denotes a machine frame that supports the packaging machine main body 10 so as to be able to move up and down. The fixed arches 2 and 3 are located at It has slide arches 20 and 21, and the upper part of the machine frame 1 is equipped with an air drive device 4 and a sliding arch by the objects to be packed to be carried into the packing apparatus in order to detect the core hole of the objects to be packed. A diameter detection lever 51 is provided below the machine frame 1, and a lifter 30 is provided below the machine frame 1, which is located parallel to the slide arches 20 and 21 and has a lifter roller 36 that can be freely rotated by a motor. ing. 5 is a band pool in which a desired amount of bands are pulled out from a band reel 6 and pooled. The band is supplied into the main body 10 via the back pool 7. Note that W indicates the item to be packed. The packaging machine main body 10 has a rectangular outer frame constituting the machine frame 1 supported by another frame body having a freely rolling guide roller, and is mounted on the machine frame 1 on the top of the other frame body. The rod end of the provided air cylinder 8 is attached, and the packaging machine main body 10 is provided within the machine frame 1 so as to be freely movable up and down. Further, a known band supply and tension mechanism 12 and welding and cutting mechanisms 13 are housed in the packaging machine main body 10, and the band supply and tension mechanism 12 and the machine frame 1 are arranged on the lower surface of the main body 10. Band guide arches 2 and 3 fixed to the left and right frames with their openings facing each other are connected to allow the packing band to pass through.
A bandway 14 is built in, and a phototube (not shown) is attached to the bottom surface of the main body 10. The left and right band guide arches 2 and 3 are curved, and the upper end surfaces of the arches 2 and 3 are arranged in the main body 1.
The lower end surface is connected to the opening surface of the bandway 14 linearly arranged in the 0, and the lower end surface is brought into contact with the upper opening surface of the rear end of the slide arch when the two slide arches enter and join. There is. Furthermore, the two slide arches 20 and 21 are housed in a case 25, with a rack carved into the lower surface of a guide rod (not shown), and a roller attached to the rear end of the guide rod that does not have the rack. There is. A gear meshing with the rack is connected to a motor via a chain to a sprocket of the gear. In this way, the slide arches 20 and 21 on the guide rod are
To move forward and backward in a straight line without causing blur in the vertical and horizontal directions. As shown in FIGS. 2 and 3, the lifter 30 transmits the rotation of a motor 32 installed on a base 31 via a threaded rod 33 to the ends of links 34 and 34 that intersect at the center, respectively. Rollers 35 provided at each end of the lifter 30 rotate in the lower part of the lifter 30 and in the groove of the machine base 1 to raise and lower the lifter 30 in a horizontal state. Further, the lifter 30 is provided with lifter rollers 36, 36 with an appropriate gap in the longitudinal direction of its upper surface, and the lifter rollers 36, 36 are provided with sprockets 37, 37 provided at one end, respectively, as shown in FIG. It is connected via a chain 40 to a motor 39 placed within a frame 38 suspended from the lifter 30 . In addition, in FIGS. 2 and 3, reference numeral 41 denotes an unloading board, and the plate body slanted toward the unloading line OL side is placed on the base 31.
The lifter 30 is installed at a height that projects from the surface of the lifter roller 36 when the lifter 30 is lowered to its lowest position. In the same figure, reference numeral 42 denotes a stopper that urges one end of the crank supported by the lifter 30 to protrude from the surface of the lifter roller 36 via a spring 43. The packaged items are transported to the delivery line IL
It is designed to prevent it from moving to the side. Reference numeral 44 denotes a stopper pin which projects from the surface of the lifter roller 36 using an air cylinder as the lifter 30 rises, and is lowered by the cylinder when the lifter 30 descends. Next, the centering mechanism according to the present invention will be explained. The centering mechanism 50 detects the diameter of the object to be packed, moves the lifter up and down based on the detected diameter, and moves the left and right slide arches 20 and 21, which move back and forth to a certain position, to move the object to be packed into the fixed moving position. It is used to locate the core hole of an object. In Figures 1, 3, 4 to 7, 5
A diameter detection lever 1 has a roller 52 at its tip, links 53, 53 are rotatably connected to the other end, and is supported by a mounting plate 22 provided above the machine frame 1. One end of the adjustment belt is attached to the upper end of this diameter detection lever 51, that is, in this embodiment, one end of the chain 54 is attached via the rod end 23, and is suspended to the left of the machine frame 1 in FIG. 1 via the sprocket 24. The other end of the chain 54 is connected to a rod 55. As shown in FIG.
5 is connected to one end of a swinging rod 57 rotatably provided on a support plate 56 erected from the base 31. The swinging rod 57 has its pivot point 58 at a 2:1 point of its entire length, and a short lever 59 is provided at the tip of the other side, that is, the short side 57a, protruding in a direction perpendicular to the swinging rod 57. and the tip of one side, that is, the long side 57b, is connected to the diameter detection lever 5 via the rod 55 as described above.
It is connected to a chain 54 that communicates with 1. In addition, 61 is a stopper, which has a built-in spring. On the other hand, 60 is a position detecting means such as a touch sensor, and the contact piece 64 of the sensor 60 is
It is attached so that it can freely come into contact with and separate from a short lever 59 provided at one end of the swinging rod 57. That is, the touch sensor 60 is installed at an appropriate position below the correction rod 65 that moves up and down together with the lifter 30 mentioned above. This correction rod 65 is connected to the second lifter roller 36
The upper end of the correction rod 65 faces the midpoint of the support plate, and the correction rod 65 is placed in parallel with the support plate so as to be able to move up and down independently in a vertical state. A spring 66 is disposed between the bearing member 67 and the upper end protrusion of the correction rod 65, and the correction rod 65
force upward. The shaft of the swinging rod 57 is provided with a one-way clutch 26 and an electromagnetic brake 27 as shown in FIG. It forms a reversal prevention mechanism that allows rotation only in the clockwise direction. 28 is weight,
Reference numeral 68 denotes a brake, which allows the swinging rod 57 to slide slowly even when the diameter detection lever 51 rises rapidly, making it possible to accurately detect the diameter of the object to be packed. It is also possible to use other detection means instead of the touch sensor 60, such as a proximity sensor or a limit switch. Next, the operating state will be explained. The packaging machine main body 10 is now in the highest position, and each end surface of the bandway 14 in the main body 10 is joined to the curved left and right fixed arches 2 and 3 fixed to the machine frame 1. Also, the left and right slide arches 20, 21
is fully opened and completely housed in the case 25, the lifter 30 is in the position shown by the dashed line in FIG.
is located at the position indicated by the two-dot chain line in the figure. When the power is turned on in this state, the diameter detection lever 51
An electromagnetic brake provided on the shaft of the swinging rod 57 interlocked with is activated, and a one-way clutch is activated to allow the swinging rod 57 to rotate in only one direction. When the object to be packed W is carried onto the lifter roller 36 from the carry-in line IL, the lever 51 rises, and the swinging rod 57 is connected to the diameter detection lever 51 via the chain 54.
The long side 57b of the swinging rod 57 rotates by the same amount as the rising distance of the diameter detection lever 51, while the short side 57a of the swinging rod 57
rotates half the distance of the long side 57b. That is, the moving distance of the long side 57b is the same as the diameter of the object to be packed, and the moving distance of the short side 57a is at the same ratio as the radius, that is, 2:1. Further, the correction rod 65 between the lifter rollers 36 and 36 is pushed down further by the placed object to be packed, as the shorter diameter of the object to be packed increases due to the size of the object to be packed. Therefore, the touch sensor 60 is also lowered. Swinging rod 5
7 is the brake provided on the axis of the swinging rod 57;
The electromagnetic brake and one-way clutch keep the diameter detection lever 51 in its sliding position when pushed up by the object to be packed. Next, when the start button is turned on, the lifter 30 is activated by the motor 32.
When the contact piece 64 of the touch sensor 60 provided on the correction rod 65 comes into contact with the short lever 59 of the swing rod 57, this signal causes the motor 32 to move upward.
, the rotation of the lifter 30 stops, and the lifting of the lifter 30 also stops.
It is fixed in that position. In response to the signal from the touch sensor 60, the motors of the slide arches start rotating, and the left and right slide arches 20, 21 move the objects to be packed into the core hole WC below the center of the packing machine body 10 so that the band can pass through. When the motor moves forward and the projections provided on the guide rods of the arches 20 and 21 push the limit switch LS2 inside the case 25, the motor stops and both the arches 20 and 21 become connected. The signal from the limit switch LS2 causes the feed roller of the band supply mechanism 12 to feed the band, and when the band passes through the connected slide arches 20 and 21 and reaches the gripping mechanism at the tip of the band in the main body 10, the band is fed out. The tip of the band pushes in the limit switch LS3 provided in the section.
Further, the feeding time of the band supply mechanism is controlled by a timer T1, and the feed motor stops rotating. The camshaft of the band adhesion/cutting mechanism 13 grips and fixes the band tip for the first time by pushing in the limit switch LS3 band provided in the gripping mechanism at the band tip. By grasping the tip of the band, the limit switch LS3 turns OFF and the corresponding
In response to the OFF signal, the main body 10 is lowered by the cylinder 8, and the band supply mechanism 12 starts to reverse rotation (primary tightening). The main body 10 stops at a position where the phototube provided on the lower surface of the main body detects the object W to be packed.
Further, the reversal is completed after a certain period of time has elapsed by the timer T2, but before that, the secondary tightening mechanism starts secondary tightening of the band in response to a signal from the phototube.
Accordingly, the band is ejected from each arch and bandway by the primary tightening, and is then wound around and tied tightly around the object to be packed. Said phototube
The secondary tightening of the band started with the timer T
3, the camshaft is rotated by the control motor again, the band supply end side is gripped and fixed, and the band is held in a tight state. At the same time as the camshaft stops rotating, the timer T4 is turned on, and after a certain period of time, the camshaft is rotated again. As the shaft rotates, the bonding and cutting process between the band overlapping parts is completed, and one round of packaging is completed. Next, the rotation of the camshaft turns on the other limit switch LS4, so that the main body 10 is raised by the cylinder 8, and the bandway 14 in the main body 10 reaches the position where it is connected to the upper edge of the fixed arches 2 and 3. Then, the limit switch LS5 is turned on, and the lifting of the main body 10 is stopped. When the main body rises, limit switch LS detects the highest position of the main body.
5, both slide arches 20 and 21 are opened by the motor. When the slide arches 20 and 21 are completely housed in the cases 25 and 25, the limit switch LS6 is turned on by the guide of the slide arches 20 and 21, and this signal stops the slide arch motor and also causes the lifter 30 to stop. The timer T6 connected to the motor 32 is ON, the motor 32 rotates, and the lifter roller 36 reaches the lowest position (double-dashed line in FIG. 3). Therefore, the items to be packed are transferred onto the carry-out line OL by the carry-out board 41. When the lifter 30 reaches the lowest position, the limit switch LS7 provided therein is turned on, stopping the lifter 30 from descending and releasing the electromagnetic brake provided on the swinging rod 57 of the centering mechanism. Therefore, the swinging rod 57 returns to its old position. or,
When the timer T6 connected to the motor 32 of the lifter 30 times up, the lifter rises again and returns to the position shown by the solid line in FIG. 7. With this return, limit switch LS8 is turned on and the electromagnetic brake of the centering mechanism is activated in preparation for the next packing.
It becomes ON.

【effect】

As described in detail above, the present invention includes a packaging machine body provided in a machine frame so as to be movable up and down, a slide arch connected to a bandway in the packaging machine body and provided in a fixed position so as to be movable back and forth; In the packaging apparatus for cylindrical objects having a core hole, the lifter is provided at an appropriate interval to support the outer periphery of the object to be packed in the longitudinal direction, and is movable up and down below the slide arch. A diameter detection lever that is rotated by the object to be packed entering the container is supported, and a swinging rod that is pivotally supported at a 2:1 point of the entire length is attached to the support plate, and this swinging rod and the diameter detection lever are attached to the supporting plate. A lever is provided to interlock with the lever, a reversal prevention mechanism is provided on the swinging rod, and a correction rod is provided facing the center of the lifter that moves up and down in conjunction with the lifter and can be depressed by the outer periphery of the object to be packed. A position detecting means is attached to the lifter, and when the lifter rises, the position detecting means rising together with the lifter stops the lifter in response to a signal generated when it comes close to or comes into contact with the swinging rod. , the outer diameter of the packaged object can be instantly and accurately detected, regardless of its diameter, and based on this detected value,
This has the effect of making it possible to center the object to be packed, that is, to automatically position the core hole of the object to be packed between the slide arches.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a front view showing the whole, Fig. 2 is a schematic diagram showing a lifter and an unloading board, Fig. 3 is a sectional view showing the operation of the lifter, and Fig. 4 is a sectional view showing the operation of the lifter. 5 is a side view showing an example of the centering mechanism, FIG. 6 is a sectional view of the central portion of FIG. 5, and FIG. 7 is a schematic diagram showing the operating state. be. FIG. 8 is a schematic diagram showing the main parts of a conventional example. DESCRIPTION OF SYMBOLS 1... Machine frame, 2, 3... Fixed arch, 4... Air drive device, 10... Main body, 12... Band supply, tightening mechanism, 13... Band welding and cutting mechanism, 20, 21... Slide arch, 30... Lifter, 31... Base, 5
0... Centering mechanism, 57... Swinging rod, 60... Position detection means.

Claims (1)

[Claims] 1. A machine frame, a packaging machine body provided in the machine frame so as to be able to be raised and lowered, and a bandway in the packaging machine body, communicating with each other,
The cylindrical shape has a core hole and includes a slide arch provided at a fixed position so as to be freely advanced and retracted, and a lifter provided below the slide arch so as to be freely raised and lowered to support the outer periphery of the object to be packed in the longitudinal direction at an appropriate interval. In the product packaging device, a diameter detection lever is supported above the machine frame and rotated by the product to be packed that enters onto the lifter, and a 2:1 point of the entire length is pivotally supported on the support plate. A swinging rod is attached, and the swinging rod and the diameter detection lever are provided to interlock with each other, and a reverse rotation prevention mechanism is provided on the swinging rod, and the swinging rod is moved up and down in conjunction with the lifter, and can be freely pushed down by the outer periphery of the object to be packed. A correction rod is provided facing the center of the lifter, and a position detection means is attached to the correction rod, and when the lifter rises, the position detection means that rises with the lifter approaches or contacts the swing rod. A centering mechanism for a cylindrical object, characterized in that the lifting of the lifter is stopped in response to a signal from the lifter.