JPH0685202U - Tape feeder for packing machine - Google Patents

Abstract

(57) [Summary] [Purpose] As a tape feeder for packing machines that perform tape-wrapping, when the tape end of a new tape reel is inserted between the feed roll pairs, it can be reliably guided to the original tape path. The thing which can prevent a fall of packing efficiency is provided. [Structure] A tape T is sandwiched in a packing machine in which a tip end side and a supply end side of a tape T circulated around an object to be packed are heated and fused, and the supply end side is cut and tape-wrapped. A pair of feed rollers 1 and 2 for feeding to the binding portion A,
A feeding guide member 3 for guiding the tape T led out from the nip portion to the tape binding portion A along a part of the peripheral surface of the feeding roller 1, and a concavo-convex portion continuous in the circumferential direction on the peripheral surface of the feeding roller 2. 4, the feed guide member 3 is provided with an uneven portion 5 that meshes with the uneven portion 4 of the feed roller 2 on the nip outlet side of both feed rolls 1 and 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tape feeder for feeding a plastic tape for packing to a tape binding unit in a packing machine for tape-wrapping an object to be packed.

[0002]

[Prior art]

 In this type of packing machine, a pair of feed rollers provided under the table on which the items to be packed are placed are driven to rotate, and a packing tape made of heat-fusible plastic sandwiched between the feed rollers is taped. After unwinding on the table through the binding part, it is circulated around the object to be packed through an appropriate guide mechanism, the leading end side is guided to the tape binding part and pressed by the first grip head, then both feed rolls are rotated in reverse. After tightening the tape, the supply end side is pressed by the second grip head, and the tape overlapping parts placed above and below the grips are heated and fused by pressing the press head, and the supply end is Tape it by cutting the side.

In general, however, the pair of feed rollers are horizontally opposed to each other, and the tape fed from the tape reel is made to enter the nip portion from the lower side, and the nip portion feeds the tape through the feed guide member. One of the feed rollers is guided along the part of the peripheral surface to the tape binding part, and the feed guide member is the upper wall of the flat tape insertion path from the nip outlet to the tape binding part. Are configured to configure.

[0004]

[Problems to be solved by the device]

 In such a packing machine, while the tape reel remains, the tape is cut at the tape bundling section for the next packing, but when a new tape reel is used up, the tape is cut. The end is manually or automatically guided between both feed rolls and fed to the tape binding section. However, in the past, when the tape end of a new tape reel was made to enter between both feed rolls, the tape end, which is often drawn out from the nip portion, did not follow the one feed roll side to be guided. However, there was a problem that it was impossible to feed because it was caught on the other side of the roll, and it took a lot of time and labor to restore it to normal, and the packing efficiency declined.

In view of the above situation, the present invention can reliably guide the original tape running path to the original tape running path when the tape end of the new tape reel is inserted between the feed roll pairs in the packing machine for tape hanging packing. Therefore, it is an object of the present invention to provide a tape supply device capable of preventing a decrease in packing efficiency.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the tape supply device according to the present invention heats and melts the front end side and the supply end side of a plastic tape T, which is wrapped around an object to be packed, at a tape binding portion A and supplies the same. In a packing machine for cutting and tape-wrapping the end side, a pair of feed rollers 1 and 2 for feeding the tape T to the tape binding portion A by rotating the tape T while sandwiching the tape T, and both feed rollers 1 , 2 is provided with a feed guide member 3 which guides the tape T drawn out between the two feed rollers 1 to the tape binding portion A along a part of the peripheral surface of one feed roller 1. The feed guide member 3 is formed with a concavo-convex portion 5 that meshes with the concavo-convex portion 4 of the other feed roller 2 on the nip outlet side of both feed rolls 1 and 2. The following configuration is adopted.

[0007]

[Action]

 Among the one feed roller 1 on the running side and the other feed roller 2 on the non-running side for feeding the tape T to the tape bundling portion, the concave convex portion 4 continuous in the circumferential direction is formed on the circumferential surface of the other feed roller 2. Since the uneven portion 4 is formed and meshes with the uneven portion 5 of the feed guide member 3 on the nip outlet side, a tape leading from the nip portion between the feed guide member 3 and the other feed roller 2 is formed. There is no gap into which the end Ta can enter. Therefore, when the tape end Ta of the new tape reel is introduced between the two feed rolls 1 and 2, the tape end Ta drawn out from the nip portion is formed between the one feed roll 1 and the feed guide member 3. It is surely guided to the tape runway.

[0008]

【Example】

 1 to 4 show a tape binding unit according to an embodiment of the present invention. This unit is one in which a tape supply mechanism and a tape bundling mechanism are integrally incorporated in a base frame 6, and is configured to be attached to a required lower position of an object mounting table (not shown) of a packing machine. And has a pair of first and second feed rollers 1 and 2 and a drive gear 7 on the front side, and an upper portion on the rear side is a tape binding portion A, and five cams 8 ... Are fixed to the lower portion. A cam shaft 9 is arranged along the horizontal front-rear direction. Then, in the tape binding portion A, the first grip head 11, the press head 12 and the second grip head 13 which are respectively fixed to the upper ends of the operating rods 10 are arranged in order from the front side, and the press head is A heater head 15 attached to the upper end of an L-shaped swing arm 14 is disposed on the side of 12, and a slide plate 16 and a center slide 17 are disposed above the heater head 15 so as to vertically overlap each other.

The first feed roller 1 is rotatably supported between the left and right side plates 6a and 6b of the base frame 6, and a gear 18 fixed to the outer end of the support shaft 1a is a drive gear arranged below. It meshes with 7. As shown in FIG. 5, the second feed roller 2 is provided with two circumferentially continuous recessed ridges 4 and 4, and is pivotally attached to the base frame 6 via a pivot shaft 19. A coil spring 21 rotatably supported between the left and right side plates 20a and 20b of the frame 20 and fixed between the base frame 6 and the rotating frame 20 opposes the first feed roller 1 in the horizontal direction. The gear 22 that is in contact with and fixed to the outer end of the support shaft 2a is arranged so as to mesh with the gear 18 of the first feed roller 1. Then, on the first feed roller 1, the feed guide member 3 is fitted between the left and right side plates 6a and 6b of the base frame 6, and the mounting pieces 3a and 3a ( 5), the base frame 6 is fixed with screws.

The feed guide member 3 has a front end that hangs down sharply in the vicinity of the nip outlets of the feed rollers 1 and 2, and the upper surface 3b is slightly inclined toward the tape binding portion A and the lower surface 3c. Of the first feeding roller 1 has a circular arc shape along the circumference of approximately 1/4, and the rear portion of the first feeding roller 1 extends from the top position of the first feeding roller 1 to the tape binding portion A and is inclined along the inclined guide plate 23. A flat tape insertion path 24 is formed between the lower surface 3c and the first feed roller 1 and the inclined guide plate 23. As shown in FIG. 5, two ridges 5 and 5 extending in the vertical direction are formed on the front end of the feed guide member 3, and both the ridges 5 and 5 and the second feed roller 2 are formed. The recesses 4 and 4 are in mesh with each other.

Below the nip portion of both feed rollers 1 and 2, a flat tape introduction path 25 is formed between the vertical guide plates 25a and 25b arranged opposite to each other, and is arranged below the unit (not shown). A tape T made of a heat-fusible plastic such as polypropylene fed from a tape reel is inserted into the tape introduction passage 25 through an insertion opening 26 formed in the bottom plate 6c of the base frame 6 and guided to the nip portion. ing.

Each operating rod 10 is fitted into a circular sliding guide hole 27a formed in a head holding plate 27 above the base frame 6 in a round shaft-shaped upper portion 10a, and a cam 8 is provided in a bifurcated lower portion 10c. It is fitted between the sliding guide bar 28 of the base frame 6 and the cam shaft 9 so as to sandwich it, and the swing bar 29, which is arranged in a laterally extending shape, is formed in a bifurcated shape at the intermediate portion 10b. One end 29a is pivotally connected by engaging the long hole 30a and the pin 30b. Each rocking bar 29 has a cam 31 as a cam follower, and a roller 31 rollingly contacting the corresponding cam 8 from the upper side is pivotally mounted at a position near one end 29a, and the other end 29b is engaged with the lower part of the base frame 6. It is urged downward by the coil spring 32, and when the roller 31 is in contact with the lower portion 8a of the peripheral surface of the cam 8, the other end 29b is in contact with the horizontal cross-shaped stopper 33 of the base frame 6 from above. It is configured to touch.

In the process in which the contact portion of the roller 31 moves from the lower portion 8a of the peripheral surface of the cam 8 to the higher portion, the swing bar 29 contacts the stopper 33 on the other end 29b side. The one end 29a side moves around the center of rotation, and the operating rod 10 rises accordingly, but before the contact portion reaches the highest position 8b of the cam 8, the operating rod 10 stops rising. Therefore, thereafter, on the contrary, the other end 29b is operated so as to be lifted up with the one end 29a side as the center of rotation, and the other end 29b is set to float away from the stopper 33. In addition, the length from the mounting portion of the roller 31 to the engaging portion of the coil spring 32 in each swing bar 29 is set to about three times the length from the mounting portion to the pivotal portion of the operating rod 10. Therefore, the lifting operation on the one end 29a side is performed with a force about 1/3 of the lifting operation on the other end 29b.

Each of the first and second grip heads 11 and 13 and the press head 12 has a substantially rectangular block shape, and the first grip head 11 has an insertion hole 34 that penetrates in the front-rear direction. Further, a cutter 35 is fixed to the front part of the press head 12 and is in sliding contact with the opening end surface of the insertion hole 34 of the first grip head 11.

The swing arm 14 of the heater head 15 has a base end portion pivotally attached to a support shaft 36 a disposed below the cam shaft 9 so as to be rotatable left and right, and the bent portion and the base frame 6 A roller 38 pivotally mounted on the lateral piece 14a is biased by a coil spring 37, which is engaged with the head holding plate 27, so as to rollly contact the corresponding cam 8 from a diagonally lower side. The heater head 15 is provided with a strip-shaped heating plate 15a protruding toward the tape binding portion A side, and the upper end of the swing arm 14 is provided with a hinge 39 in the swing direction of the swing arm 14. The heating plate 15a is mounted so as to be tiltable in a direction orthogonal to each other, and is constantly held by the coil spring 40 attached to the hinge 39 in a state in which the heating plate 15a is tilted low toward the supply side of the tape T.

Both the slide plate 16 and the center slide 17 are slidably fitted on slide guide frames 6d, 6d on the upper side of the base frame 6 along the left-right direction. The slide plate 16 is set so that the front part covers the tape binding part A at the forward position where both ends of the advancing restriction bar 16a fixed to the rear end abut on the end faces of the slide guide frames 6d, 6d. At the same time, the coil springs 41, 41 are engaged between the both ends of the advancement restriction bar 16a and the front portions of the slide guide frames 6d 1, 6d in the forward direction, and the coil springs 41, 41 are urged toward the rear portion of the lower surface. A horizontal bar-shaped locking bar 16e is fixed. Further, the center slide 17 includes a horizontal upper tape guide plate 17b having a strip-shaped actuator 42 attached to the upper surface at the center of the front end of a thick plate-shaped main body 17a, and a lower tape guide plate inclined at the tape inlet side. The tape 17c and the tape guide plates 17b and 17c are provided so as to be vertically opposed to each other, and both tape guide plates 17b and 17c are moved by the rocking motion of the actuating lever 43 whose end engages with the locking hole 17d of the main body 17a. It is set so as to move between an advanced position arranged above and a retracted position in which the rear end is in contact with the locking bar 16e of the slide plate 16.

The actuating lever 43 is substantially L-shaped, and the lower end portion thereof is pivotally attached to the support shaft 36b so as to be swingable left and right on the side opposite to the swing arm 8 of the heater head 3 with the cam shaft 7 interposed therebetween. Further, the roller 45 pivotally attached to the lateral piece portion 43a is urged by the coil spring 44 attached to the side of the base frame 6 so as to be in rolling contact with the corresponding cam 8. The length of the center slide 17 is set to be shorter than the length from the front end of the slide plate 16 to the locking bar 16e by the width of the tape binding portion A. As a result, when the slide lever 16 and the center slide 17 are both in the forward position, the operation lever 43 is tilted rearward, so that only the center slide 17 first joins the tape guide plates 17b and 17c to the tape binding portion. It retreats to a retracted position where it is disengaged from A, then its rear end engages with the locking bar 16e, and both 16 and 17 integrally retract to the retracted position shown in FIG.

The five cams 8 of the cam shaft 9 are, in order from the front side, for the first grip head 11, the slide plate 16 and the center slide 17, the press head 12, the heater head 15, the second head. The grip head 13 is provided with an outer peripheral shape that controls the operation of each part described later by the rotation of the cam shaft 9. The gear 9a at the rear end of the cam shaft 9 is meshed with a drive gear of a drive motor (not shown), and the cam shaft 9 is started and rotated by a detection signal from the actuator 42.

To start the tape-wrapping packaging, the first grip head 11 is in an upper position where the insertion hole 34 faces the tape insertion passage 24, the press head 12 is in a lower limit position, the second grip head 13 is in an intermediate position, and a heater is used. The head 15 is set to the retracted position, and the slide plate 16 and the center slide 17 are set to the advanced position. At this time, the insertion hole 34 of the first grip head 11 faces between the upper and lower tape guide plates 17b and 17c of the center slide 17, and the upper surface of the upper tape guide plate 17b, the upper surface of the first grip head 11, and the feed guide member. The upper surfaces of 3 are at the same height.

Here, the first and second feed rollers 1 and 2 are rotated in the feed direction by the rotation of the drive gear 7, and the tape T fed from a tape reel (not shown) arranged below the unit is inserted into the base frame 6. When the tape is introduced from the mouth 26 through the tape introduction path 25 into the nip portion of both feed rollers 1 and 2, the tape end Ta exiting from the nip portion has the unevenness portions 4 and 5 of the second feed roller 2 and the feed guide member 3. Since they are meshed with each other, they are reliably guided to the tape insertion passage 24 along the peripheral surface of the first feed roller 1 without being caught by the second feed roller 2 side. Then, the tape end Ta that has passed through the tape insertion path 24 passes between the insertion hole 34 and the tape guide plates 17b and 17c, and circulates around the article to be packaged on the package packaging table (not shown). Then, it is guided onto the upper tape guide plate 17b of the center slide 17 through the first grip head 11 and pushes the actuator 42.

At this time, the signal generated from the actuator 42 stops the rotation of the drive gear 7 to stop the feeding of the tape T, the cam shaft 7 is activated to rotate, and the center slide 17 retreats to the retracted position. The first grip head 11 rises to sandwich the tape T on the tip side between the first grip head 11 and the slide plate 16, and the roller 31 of the swing bar 29 corresponding to the first grip head 11 moves to the highest position 8a of the cam 8. Upon rolling contact, the other end 29b side of the swing bar 29 floats away from the stopper 33, so that the tip end side of the tape T is elastically and strongly gripped. Here, the drive gear 7 is rotationally driven in the opposite direction to the front, the tape T is pulled back by the return rotation of the feed rollers 1 and 2, and the article to be packed is bound by the tape T.

Next, the second grip head 13 rises to grip the supply side tape T with the slide plate 16 elastically and strongly like the first grip head 11, and the swing arm 14 The rotation of the heater head 15 advances and the heating plate 15a is inserted between the tape T and T on the leading end side and the tape side on the supply side, and then the press head 12 moves up to lift the heating plate 15a and the upper and lower tapes T and T. While pressing, the cutter 35 cuts the tape T on the supply side at the opening edge of the insertion hole 34. Next, the press head 12 descends slightly, during which the heater head 15 retreats and separates from the tape overlapping section, and then the press head 5 rises to the upper limit and the upper and lower tapes T, T that are in a heated state are removed. Similar to the first and second grip heads 11 and 13, they are elastically strongly pressed and fused. Then, the first and second grip heads 11 and 13 and the press head 12 are lowered, and the slide plate 16 is also retracted, so that the tape-wrapped object can be taken out. After that, while the remaining tape reel remains, the next packing is performed in the same manner as described above, starting from the tape end cut at the opening edge of the insertion hole 34.

As means for orbiting the tape T around the object to be packed, a method of passing the tape T through a fixed arch-shaped tape guide and then detaching it from the tape guide, or guiding the tape by a swing-type guide arm is used. It is possible to adopt various means in the existing packing machine such as the method. Therefore, in the present invention, the detailed configuration such as the shape of each operating member in the tape binding portion A, the operating mechanism, and the like can be modified in various ways other than the embodiment, for example, the first and second grip heads 11 and 13 and the press. Each operating rod 10 of the head 12 may directly contact the cam 6 as a cam follower to drive the head 6 forward and backward. Further, the concavo-convex portion where the feed guide member 3 and the second feed roller 2 mesh with each other may be set in a concavo-convex relationship opposite to the illustrated one.

[0024]

[Effect of device]

 According to the present invention, a package in which the front end side and the supply end side of the plastic tape wound around the object to be packed are heated and fused at the tape binding portion, and the supply end side is cut to perform the tape-hanging packing. As a tape feeding device of the machine, the peripheral surface of the non-travel side feed roller and the feed guide member are located on the nip outlet side among a pair of feed rollers that feed the tape to the tape binding section by rotating the tape while sandwiching it. Since there is no gap where the tape ends enter due to the concavo-convex meshing, when the tape end of a new tape reel is inserted between the feed roll pair, the tape end that comes out from the nip part and the feed roll on the runway side feed There is no risk that the tape will be guided to the tape runway formed between the guide member and the feed roll on the non-runway side, and that the tape will not be fed, making it possible to change the approach direction of the tape end as in the past. Always without requiring labor and time for returning, those high packing efficiency can secure is provided.

[Submission date] June 4, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

Each operating rod 10 is fitted into a circular sliding guide hole 27a formed in a head holding plate 27 above the base frame 6 in a round shaft-shaped upper portion 10a, and a cam 8 is provided in a bifurcated lower portion 10c. It is fitted between the sliding guide bar 28 of the base frame 6 and the cam shaft 9 so as to sandwich it, and the swing bar 29, which is arranged in a laterally extending shape, is formed in a bifurcated shape at the intermediate portion 10b. One end 29a is pivotally connected by the engagement of the pivotal hole 30a and the pin 30b. Further, each swing bar 29 has a roller 31 which is a cam follower near one end 29a and is pivotally attached to the corresponding cam 8 from the upper side, and is engaged with the lower end of the base frame 6 on the other end 29b side. The roller spring 31 is urged downward by the coil spring 32 so that the other end 29b of the roller 31 comes into contact with the horizontal bar-shaped stopper 33 of the base frame 6 from above when the roller 31 comes into contact with the lower portion 8a of the peripheral surface of the cam 8. Is configured.

[Brief description of drawings]

FIG. 1 is a side view of a tape binding unit according to an embodiment of the present invention.

FIG. 2 is a plan view of the tape binding unit.

3 is a sectional view taken along the line III-III of FIG.

4 is a cross-sectional arrow view taken along line IV-IV of FIG.

FIG. 5 is an exploded perspective view of a main part of a tape supply device in the tape binding unit.

[Explanation of symbols]

 1 First feed roller (one feed roller) 2 Second feed roller (other feed roller) 3 Feed guide member 4 Recessed ridge (uneven portion) 5 Relief ridge (uneven portion) A Tape binding portion T Tape Ta Tape end Ta

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[Procedure amendment]

[Submission date] June 4, 1993

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 4

[Correction method] Change

[Correction content]

[Figure 4]

Claims (1)

[Scope of utility model registration request] 1. A packing machine for carrying out tape fusion packing by heating and fusing a front end side and a supply end side of a plastic tape wrapped around an object to be packed at a tape binding portion and cutting the supply end side. A pair of feed rollers that feed the tape to the tape binding portion by rotating the tape while sandwiching the tape, and a tape binding portion in which the tape led out from between the feed rollers is along a part of the peripheral surface of one feed roller. And a concavo-convex portion continuous in the circumferential direction on the peripheral surface of the other feed roller, and the concavo-convex portion of the other feed roller is provided on the feed guide member at the nip outlet side of both feed rolls. A tape feeding device for a packing machine, in which a concavo-convex portion that meshes with the portion is formed.