JPH0451406B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a packaging machine, and more specifically, a slide table of the packaging machine and a band feeding mechanism provided below the slide table. Concerning band guides.

Technical Background For example, the various mechanisms necessary for packaging with a fully automatic packaging machine that has a band guide arch on the packaging machine body are as follows:
As shown in the figure and FIG. 6, the lower end of a table frame 20 with a slide table 11 at the upper end is located in the parallel facing surface plates 21, 22, 23 provided in an upward U-shape. is slidably supported on the main shaft 24, and a band guide 18 having a band guide groove 18' is attached to the upper end of a band guide arm 25, which is also slidably supported on the main shaft 24 outside the surface plate 23. The band guide 18 enters directly under the slide table 11 by means of the band guide arm 25, and is also provided so as to be freely retractable to the rear of the plane of the drawing, and furthermore, a band passageway that moves up and down to the lower surface of the slide table 11 via a band so that it can be press-contacted and separated. A right press 15, a middle press 16, and a left press 17 are provided. On the outside of one surface plate 22, a pair of upper rollers 12 are provided which feed the band B out of the main body, that is, supply the band and pull it back into the main body, by a drive mechanism (not shown) via the band introducing path 14. A main roller 13 is provided,
The other surface plate 23 supports an end of a bandway 19, which has a flap 19' that can be opened and closed to form a band passage permitting gap on its upper surface, and one opening edge of the bandway 19 is placed above the main body. It is installed so that it communicates with the band guide arch installed over the.

Band B is the pair of rollers 12, 1.
3, the band introduction path 14, right press 1
Through the band passage 15' of 5 and the band guide groove 18' of the band guide 18, the flap 1 which can be opened and closed
9', the band is fed into the left bandway 19 whose upper surface has a band passage permitting gap, and when it goes around the band guide arch and reaches between the lower surface of the slide table 11 and the upper surface of the band guide 18, the cam shaft 26
At the same time, the right press 15 is raised by the rotating cam 27 and grips and fixes the band tip end side between it and the lower surface of the slide table 11, and at the same time, the band guide 18 is moved backward by the cam 30 in the plane of FIG.
By reversing the pair of rollers 12 and 13, the band B
When it is pulled back and wrapped around the packaged item on the main body,
Tightening is performed by a band tightening mechanism (not shown),
After the left press 17 is raised by the cam 29 and grips and fixes the supply end side of the band B between it and the lower surface of the slide table 11, a heater (not shown) enters the lower side of the slide table 11 from the front of the drawing and closes the band. The cam 28 is inserted between the overlapping surfaces of B.
This causes the middle press 16 to rise, and this middle press 1
The lower blade formed on the upper edge of 6 and the upper blade formed at the exit of the band passage 15' of the right press 15 cut the supply end side of the band B, and furthermore, the upper surface of the middle press 16 meets the lower surface of the slide table 11. After melting the band by pressing the band and the heater in the polymerized state between the two, the middle press 16 slightly lowers and the heater exits from the band overlapping area, and then the middle press 16 rises again. Then, the overlapping portion of the band is crimped with the lower surface of the slide table 11, and as each press member 15, 16, 17 descends, the slide table 11 is moved in conjunction with the withdrawal of the band guide 18 or by a cam (not shown). After exiting to the rear of the paper in FIG. 5, the slide table 11 and band guide 18 advance again to the front of the paper to supply the band and complete one packing process.

In the above process, the slide table 11 is used for each press member 15, 16, 17 when gripping and fixing the band tip and supply end side, and crimping the overlapping part of the band.
The load (pressure) is approximately 50 to 60 kg/cm ² per press member.
It is. Therefore, for example, when the band is pulled back and tightened after the band tip is gripped by the above-mentioned right press, the slide table is
In this case, the slide table will be pulled in the tightening direction, causing slight distortion in the table frame and each member, as it will be subject to the enormous force of both the Kg/cm ² press load and the band tightening force. It is something.

Problems with the Prior Art As mentioned above, since the slide table is required to have enough strength to withstand the force such as pressure caused by the rise of each press member, conventionally the slide table is generally
As shown in the figure, it is constructed from a planar convex metal plate having a predetermined wall thickness, and is attached to the table frame 20 by screwing at four locations on both sides. The table frame 20 is similarly constructed by welding or casting a metal plate having a predetermined thickness, as shown in the figure, and connects the lower edge of the approximately L-shaped side plate so that the main shaft 24 can be freely inserted therethrough. The back side is reinforced and connected with plate pieces. The band guide 18 is arranged below the slide table 11 in order to feed the band from the band passage 15' exit of the right press 15 to the opening edge of the left bandway 19. 15 and the slide table 11, and must exit from the bottom of the slide table to the rear of the paper in FIG. 6 before the upper roller 12 and main roller 13 pull back the band.
The band must remain on standby on each press member until the band welding process is completed.

Therefore, the band guide arm 25 that supports the band guide 18 at the upper end is configured as shown in FIG.
The cam 3 of the camshaft 26 is bent into a substantially L-shape, and its lower end is supported by the main shaft 24 on the outside of the surface plate 23.
0, it is configured to be freely slidable. A notch 23' is formed at the upper end of the surface plate 23 to avoid the rotation locus of the band guide arm 25.
In addition, in order to ensure the wall thickness for screwing the slide table, the band guide 18 on the band guide arm 25 is bent so that the attachment part to the band guide arm is at a lower position than the guide part on the top surface. The band guide 18 is configured to escape into the space within the table frame 20 below the slide table 11 when the band guide 18 slides.

In the conventional device configured as described above, in order to supply the band into the arch on the main body with high accuracy in a fully automatic packing machine, the exit of the band guide groove 18' of the band guide 18 and the band Although it is desirable that the end edge entrance of the way 19 be close to the band guide 18 with a rotation allowable gap, it is necessary to shorten the lifting distance of each press member as much as possible to achieve high-speed packing. , band guide 18
The overall thickness is made as thin as possible, so
Since the guide portion on the upper surface of the band guide 18 is configured to be located directly below the slide table 11 with a gap slightly larger than the thickness of one band, the exit edge of the band guide groove 18' If the band guide 18 is placed close to the inlet edge of the left bandway 19 with a rotation allowable gap for the band guide, the band guide 18 will collide with the upper end of the table frame 20 of the slide table 11 when retreating after supplying the band. It turns out. If the table frame 20 is moved further back from its current position, it will not be possible to screw the slide table 11 to the upper end of the table frame 20 at four locations, and the slide table will withstand the pressure of each press member. Unable to maintain strength. Therefore, in order to maintain this strength and secure the threaded portion, the table frame must have the shape described above, and in order to secure the wall thickness for screwing the slide table, the band guide arm must be The band guide 18 on the top 25 has a bent shape so that the attachment part to the band guide arm is at a lower position than the guide part on the upper surface, and when the band guide 18 slides, it escapes into the space inside the table frame 20 below the slide table 11. Therefore, a gap approximately equal to the thickness of the table frame 20 is created between the end edges of the band guide groove 18' outlet and the left bandway 19 inlet. For this reason, the tip of the band that has come out of the band guide groove 18' of the band guide 18 cannot be accurately fed into the left bandway 19, and the band may jump out onto the main body. The end edge of the flap 19', which is urged to close by the band guide groove 18', is designed to extend in a tongue shape to a position close to the outlet of the band guide groove 18', thereby preventing the band from popping out. is not perfect, and when the band is supplied, nipping may occur where the band is folded over each other in a jagged manner.
There is also the problem that band supply cannot be performed at high speed. This problem is particularly noticeable when using narrow or stiff bands. Further, since the band guide arm 25 and the cam 30 are located outside the table frame 20 of the slide table 11, that is, outside the surface plate 23, it cannot be made compact and the entire device becomes large and heavy. , the shapes of the band guide and band guide arm are subject to restrictions. These drawbacks of conventional devices are not limited to fully automatic packaging machines, but are common to semi-automatic packaging machines that do not have a band guide arch straddling the main body.

Purpose of the Invention The present invention was developed in order to eliminate the drawbacks of the prior art described above, and its purpose is to provide a slide table with a cantilevered structure and to reduce the vertical load caused by the pressing of the press member. The strength of the slide table against the horizontal load applied to the slide table when the band is tightened is maintained sufficiently, and the edge of the band guide groove of the band guide is placed as close as possible to the edge of the left bandway to create a narrow width. Or, a packing machine that can feed bands at high speed even when the band is weak, and also allows the band guide arm to be placed inside the surface plate, making the entire device lighter and more compact. Our goal is to provide the following.

Structure of the Invention In order to achieve the above object, the present invention includes a surface plate having an upward U-shape, a band supplying, pulling back, and tightening mechanism attached to the outer surface of the surface plate, and a band supplying, pulling back, and tightening mechanism disposed within the surface plate. , a press member that is moved up and down by a cam, a gripping mechanism on the band tip and supply end sides consisting of a slide table whose upper end is pressed into contact with the press member via a band and rotated by the cam, and a welding mechanism for the band overlapping part. , a packaging machine including a band guide that extends between the upper end of the press member disposed in the surface plate and the lower surface of the slide table and guides the band supplied from the end of the band supply mechanism when the band is supplied, the slide table; One rear edge in the band supply direction is attached to a slide table arm that is slidable within the surface plate, and the upper surface of the other side is configured to freely come into contact with the lower surface of a holding part provided at the upper end of the surface plate. A band guide arm having a band guide at an upper end that moves forward and backward on the press member is disposed within the surface plate.

Effect of the Invention Therefore, in the present invention, one side edge of the slide table perpendicular to the band supply direction is attached to the slide table arm, and the upper surface of the other side is held by a holding part formed on the lower surface of the holding piece to hold the band tip. In addition to sufficiently withstanding the load of each press member during gripping of the supply end and welding of the band overlapping portion, the band exit of the band guide of the band guide arm disposed in the surface plate should be placed close to the left bandway entrance. This is to smoothly guide the band supplied from the end of the supply mechanism to the outside of the main body.

Hereinafter, details of the present invention will be explained based on figures showing examples.

DESCRIPTION OF EMBODIMENTS In FIGS. 1, 2, and 4, a surface plate 46 and a surface plate 47 are vertically provided on two opposing side edges of the upper surface of a horizontally arranged surface plate 45, The entire surface plate is formed in an upward U-shape.

A slide table 41 is provided between the surface plate 46 and the surface plate 47. That is, the slide table 41 has a substantially convex planar shape, and the side edge on the side of the surface plate 46 has a screw 6 attached to the upper end of the slide table arm 42 formed in an L shape with the lower end protruding at a right angle.
8,68. A main shaft 57 is inserted below the surface plate 46 and the surface plate 47, and the tip of the lower end of the slide table arm 42 protruding at right angles is rotatably supported on the main shaft 57.
A trochanter 71 is rotatably supported on the side surface of the slide table arm 42 facing the surface plate 47. Further, a camshaft 60 is provided that passes through approximately the center of the surface plate 46 and the surface plate 47 and is directly connected to the output shaft of the reducer. are pressed together. The speed reducer is fixed to a surface plate 47.
Further, the side edge of the upper surface of the slide table 41 on the side of the surface plate 47 is cut out in a step shape so as to engage or abut the lower surface of a holding portion 67'' formed on a holding piece 67 and a locking piece 67', which will be described later. A holding portion 41' is formed.

A notch 77 is formed on the upper surface of the surface plate 47, and a holding piece 67 and a locking piece 67' are attached.
A gap is formed between both end edges of the holding piece 67 and the locking piece 67' to allow the band to pass in the width direction. The holding piece 67 has an elongated plate shape, and its width is equal to that of the surface plate 47.
It is approximately twice the thickness of , and one longitudinal edge is a surface plate 46.
The holding portion 67'' is formed by protruding to the side, and the lower surface of this protruding portion is notched in a step-like manner along the longitudinal direction.The holding piece 67 is fixed through the elongated hole with screws 69, 69. , its edge is a surface plate 47
It is formed in such a length that it protrudes above the notch 77 formed therein. Furthermore, the locking piece 67' is also an elongated plate shape.
It has the same width as the holding piece, and one side edge protrudes toward the surface plate 46, and the lower surface of this protruding portion is cut out in a stepped manner to form a holding part 67'', and the side facing the holding piece 67 has a width similar to that of the holding piece. is continuous with the end face of the notch 77 of the surface plate 47.As described above, the held part 41' of the slide table 41 is connected to the holding part 67'' of the holding piece 67 and the locking piece 67'. comes into contact.

Further, between the surface plate 46 and the surface plate 47, a right press 48, a middle press 49, and a left press 50 are arranged below the slide table 41. A trochanter 7 is provided at the lower end of these press members 48, 49, 50.
4. A trochanter 75 and a trochanter 76 are rotatably supported and are pressed into contact with cams 64, 65, and 66 attached to the camshaft 60, respectively. A band passage 48' is bored at the upper end of the right press 48, tilting slightly upward toward the surface plate 47, and an upper blade is formed at the upper edge of the outlet. A lower blade is formed in and is configured to abut against the side surface of the right press 48.

A band guide 43 is provided between the lower surface of the slide table 41 and the upper ends of the middle press 49 and the left press 50. This band guide 43 is formed with a band guide groove 43' and has a U-shaped cross section, and is a flat band guide arm whose lower end is supported by the main shaft 57 between the slide table arm 42 and the surface plate 47. 44 is supported by a screw 70.
A trochanter 72 is rotatably supported on the side surface of the band guide arm 44 on the surface plate 47 side.
It is pressed into contact with a cam 62 attached to. The cam 62 and the rotor 72 are located in a notch 78 punched out in the surface plate 47. band guide 4
3 is in contact with the lower surface of the slide table 41 through a gap slightly larger than the thickness of one packing band, and the entrance of the band guide groove 43' is in contact with the band passage 48' of the right press 48. Facing the exit, the exit of the band guide groove 43' is close to the band entrance at the opening edge of the left bandway 54 and flap 54'. The band entrance of the left bandway 54 is located at the outer edge of the surface plate 47 in a notch 77 formed on the upper surface of the surface plate 47.

3 and 4, a heater arm 59 is supported by a main shaft 57 between the slide table arm 42 and the band guide arm 44, and a heater 58 is disposed at the upper end of the heater arm 59, facing the band guide 43. It can be installed as follows. Further, a trochanter 73 is pivotally supported on the side surface of the heater arm 59 on the surface plate 47 side, and this trochanter 73 is pressed into contact with a cam 63 attached to a camshaft 60 .

In FIG. 1, 51 is a main roller which is rotated forward and backward by a motor to supply and pull back the band B;
Reference numeral 2 denotes an upper roller which is pressed into contact with the main roller 51 via the band B and rotates. Reference numeral 56 is a tension arm equipped with a band gripping mechanism at its upper end. It slides as it rotates to grip and tighten the supply end side of band B. Reference numeral 53 denotes a band introduction passage, which has the shape of a gutter with a lid, the entrance thereof facing the band gripping mechanism at the upper end of the tension arm 56, and the exit facing the band passage 4 of the right press 48.
8' Facing the entrance.

Next, the action will be explained.

Each press member, slide table, band guide, etc. are now in their original positions as shown in FIGS. 1, 2, and 3. From this state, the main roller 51 and the upper roller 52 rotate normally, so that the band B is transferred to the band introduction path 53 and the band path 4 of the right press 48.
8' and the band guide groove 43' of the band guide 43, and is properly fed into the left bandway 54 adjacent to the exit of the guide groove 43'. When the band B that has gone around the band guide arch reaches between the lower surface of the slide table 41 and the upper surface of the band guide 43, the camshaft 60 is rotated by a signal from a timer or limit switch that detects this arrival.
The right press 48 is raised by the cam 64 and grips and fixes the front end of the band B between it and the lower surface of the slide table 14. At the same time, the band guide arm 44 whose lower end is supported by the main shaft 57 is rotated by the rotation of the cam 62 to the rear of the paper in the first drawing (the third
The band guide 43 at the upper end of the band guide arm 44 exits from above the middle press 49 and the left press 50. Then, when the main roller 51 and the upper roller 52 reverse and pull back the band B, and the band B that pops out from inside the arch wraps around the object to be packed on the main body, a signal from a limit switch or the like that detects the end of this pulling back causes the camshaft 60 to be pulled back. rotates, and the tension arm 56 is slid to the right in FIG. 1 by the tension cam 55 to grip and tighten the supply end side of the band B. At this time, a load that causes horizontal twisting is applied to the slide table 41, but the slide table 41 is supported by the slide table arm 42 and the holding piece 67 on both side edges perpendicular to the band tightening direction, and the load is applied to the slide table 41. can withstand sufficiently.

Then, by the rotating cam 66, the cam 66
The left press 50, on which the lower end trochanter 76 is pressed, rises to grip and fix the supply end side of the band B between it and the lower surface of the slide table 41. At this time, the right press 48 is pressed against the surface plate 46 side of the lower surface of the slide table 41, and the left press 50 is pressed against the surface plate 47 side at a pressure of approximately 50 to 60 kg/cm ² . The platen 46 side is supported by the slide table arm 42, and the front side of the surface plate 47 side of the slide table 41 is supported by the holding part 67'' of the locking piece 67', and the rear part is supported by the holding part 67'' of the holding piece 67. Since the slide table 41 is firmly held, the tip and supply end of the band B are securely held without being pushed up by the upward pressure of the right press 48 and the left press 50.

The rotating cam 63 causes the heater arm 59, whose lower end is supported by the main shaft 57, to slide upward in FIG. 2 (to the right in FIG. 3) via the trochanter 73.
Heater 5 attached to the tip of heater arm 59
8 is inserted between the band B polymerization surfaces. At the same time,
The rotating cam 65 raises the middle press 49 with the lower end roller 75 pressed against the surface of the cam 65, and the lower blade formed on the right press 48 side at the upper end of the middle press 49 and the band passage of the right press 48 The upper blade formed on the upper edge of the outlet 48' cuts the supply end side of the band B, and the middle press 49 is inserted between the lower surface of the slide table 41 and the overlapping band B and this overlapping surface. After melting the band B by pressing the three parts together with the heater 58, the middle press 49 descends slightly, and the heater arm 59 slides downward in FIG. 2 (to the left in FIG. 3). When the heater 58 moves out from between the band overlapping surfaces, the middle press 49 rises again and presses the overlapping surface of the band B which is in a molten state between it and the slide table 41. At this time,
All press members 4 are placed on the bottom surface of the slide table 41.
8, 49, and 50 are pressed against each other, and an upward pressing force is applied thereto.As mentioned above, the slide table 41 is supported on the surface plate 46 side by the slide table 42, and on the surface plate 47 side by the holding piece. 67 and the locking piece 67', it is not pushed upward by the press member.

Thereafter, each press member is lowered by the rotating cam, and the tension arm 56 slides to the left in FIG. 1 due to the rotation of the tension cam 55 and returns to its original position. The slide table 41 slides backward in the plane of FIG. 1 (upward in FIG. 2, rightward in FIG. 3) via the trochanter 71, and the slide table 41 exits from between the article to be packed and the band B. At this time, the slide table 41
As shown by the two-dot chain line in FIG.
The holding piece 67 provided on the upper surface of the locking piece 67' and the holding part 67'' on the lower surface of the protruding portion of the locking piece 67' rotate with no friction at all.Therefore, there is no need to lubricate these parts.Holding The tip of the piece 67 is inserted into the screw 6 through the elongated hole.
9 and 69 are screwed onto the surface plate 47, the edge thereof is located above the notch 77 of the surface plate 47, and the locking piece 6
7', that is, the end face of the notch 77, with a gap that allows the band to pass in the width direction, so that the band can be accurately controlled while being regulated by both end edges of the holding piece 67 and the locking piece 67'. It escapes from the part in a state where it can be wrapped around the object to be packed. Next, as the slide table arm 42 slides, the slide table 41 advances onto the press member again as shown by the solid line in FIG. At the same time, when the band guide 43 advances between the slide table 41, the middle press 49, and the left press 50 due to the sliding movement of the band guide arm 44, the band is fed into the arch by normal rotation of the main roller 51 and the upper roller 52. One step of packaging is completed.

Effects of the Invention As described above, the present invention includes a surface plate having an upward U-shape, a band supplying, pulling back, and tightening mechanism attached to the outer surface of the surface plate, and a mechanism disposed within the surface plate that is operated by a cam. It has a press member that moves up and down, a gripping mechanism on the band tip and supply end sides consisting of a slide table whose upper end is pressed into contact with a band through a band and is rotated by a cam, and a welding mechanism for the band overlapping part. Sometimes, in a packaging machine equipped with a band guide that extends between the upper end of the press member disposed in the surface plate and the lower surface of the slide table and guides the band supplied from the end of the band supply mechanism, the band supply of the slide table is provided. one side edge of the rear side in the direction is attached to a slide table arm that is slidable within the surface plate, and the upper surface of the other side is configured such that it can freely come into contact with the lower surface of a holding part provided at the upper end of the surface plate, and the press member Since a band guide arm having a band guide at the upper end that moves upward and backward is disposed within the surface plate, the slide table has one edge perpendicular to the band supply direction supported by the slide table arm, and the upper surface of the other side supported by the slide table arm. Since it is held by the holding part formed on the lower surface of the holding piece, the band is held by the tip end and supply end side, and the vertical load and band tightening due to the upward pressing of the press member that is pressed when welding the band overlapping part. It is possible to ensure sufficient strength to absorb the horizontal load at times. Furthermore, the band guide arm with the band guide attached can be placed inside the surface plate, making it possible to place the reducer etc. in close proximity to the surface plate, making it possible to make the entire device lighter and more compact. .

Furthermore, when the present invention is implemented in a fully automatic packing machine, the band exit of the band guide can be shaped to be close to the left bandway entrance.
The tip of the band during supply can be reliably fed to the left bandway, and the speed of band supply can be increased.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention; Figure 1 is a front view, Figure 2 is a plan view, Figure 3 is a side view of main parts, and Figure 4 is an exploded perspective view. . Also,
5 and 6 show the prior art.
The figure is a front view, and FIG. 6 is an exploded perspective view. 11,41...slide table, 12,52
...Upper roller, 13,51...Main roller, 14,53...Band introduction path, 15,48...
...Right press, 15', 48'...Band passage, 1
6,49...middle press, 17,50...left press, 18,43...band guide, 18',4
3'... Band guide groove, 19, 54... Left bandway, 19', 54'... Flap, 20... Table frame, 21, 22, 23, 45, 4
6,47...Surface plate, 23'...Notch, 24,57
... Main shaft, 25, 44 ... Band guide arm,
26, 60...camshaft, 27, 28, 29, 3
0, 61, 62, 63, 64, 65, 66... cam, 41'... held part, 42... slide table arm, 55... tension cam, 56...
Tension arm, 58... Heater, 59... Heater arm, 67... Holding piece, 67'... Locking piece,
67″...Holding part, 68, 68, 69, 69, 7
0...Screw, 71, 72, 73, 74, 75, 7
6... Trochanter, 77, 78... Notch, B... Band.

Claims (1)

[Scope of Claims] 1. A surface plate forming an upward U-shape, a band supplying, pulling back, and tightening mechanism attached to the outer surface of the surface plate, and a press member disposed within the surface plate and raised and lowered by a cam. , the upper end of the press member is pressed through the band and has a gripping mechanism on the band tip and supply end side consisting of a slide table rotated by a cam, and a welding mechanism for the band overlapping part, and when the band is supplied, the surface plate A packing machine including a band guide extending between an upper end of a press member disposed inside and a lower surface of a slide table and guiding a band supplied from an end of the band supply mechanism, one side of the rear side of the slide table in the band supply direction. a band whose edge is attached to a slide table arm that is slidable within the surface plate, and whose other upper surface is configured to freely come into contact with the lower surface of a holding part provided at the upper end of the surface plate, and which moves forward and backward on the press member; A packaging machine characterized in that a band guide arm having a guide at an upper end is disposed within the surface plate. 2. The holding section has a step formed on the lower surface of the holding piece, and a locking piece provided on the lower surface of the holding piece facing each other with an interval that allows the band to pass in the width direction at the edge of the holding piece in the band supply direction. A packaging machine according to claim 1, comprising a step portion formed therein. 3. The packaging machine according to claim 1, wherein the front side surface of the band guide in the longitudinal direction in the band supply direction faces the edge of the bandway with a small gap therebetween.