JPH037285Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a so-called automatic packing machine in which a band guide arch is attached to the main body. This relates to a band guide unit that guides the band.

[Technical background]

Figure 7 is a side view showing the general configuration of a horizontal arch type packaging machine among automatic packaging machines.
is a self-propelled mechanism that is installed on a machine base 4 that can be raised and lowered by a chain 3 that engages with sprockets mounted on the upper and lower ends of the machine frame 2 so that it can move forward and backward (in the left and right directions in the figure), and has three sides that are U-shaped in plan. A band guide arch 5 is provided horizontally on the main body 1, and a drive winding mechanism 6 connected to the sprocket lowers the arch 5 together with the main body 1 by one or several steps, and the band guiding arch 5 is lowered by one or more steps to lower the band guide arch 5, which is a known band built into the main body 1. The feeding, tightening, cutting, and welding mechanism wraps the object 8 on the conveyor line 7 in a hoop shape, that is, by wrapping one or more bands horizontally, and then the main body rises and carries the object 8 on the conveyor line 7. The arch 5 is moved from below.

[Prior art and problems]

In the above process, the packing band is
When the tip of the band is gripped, the band is unwound (primary tightening) and then further tightened (secondary tightening). 4
In Figure BS), the band leaves the arch 5 and wraps around the packaged item in a honeycomb shape, but since the arch 5 is in a horizontal direction, the band coming out from inside the arch falls to some extent below the arch 5 and wraps around the packaged item. It will wrap around 8. Therefore, the band does not wrap around the object to be packed horizontally, making it impossible to sufficiently tighten and accurately bond the object to be packed 8. This phenomenon becomes more pronounced as the inner dimensions of the arch become larger and the outer dimensions of the object to be packed become smaller.

Even when the outer surface of the object to be packed is close to the outlet of the band on the inner edge of the arch, the bands are pulled back sequentially from one side of the arch (band supply end side), and the band that protrudes from the arch is close to the outlet of the band on the inner edge of the arch. In the case of the outer surface, especially the corner of a square-shaped object to be packed, or something with a high coefficient of friction such as Styrofoam, the band that has already protruded from the arch will be pulled back while strongly rubbing against the outer surface of the object to be packed.
In particular, there are cases where the tip of the supplied band does not follow the speed with which the band is pulled back and sags downward from the arch, and the band does not always wrap securely around the item to be packed, requiring repacking, which reduces work efficiency. In order to avoid such drawbacks, that is, packaging defects, especially on automatic packaging lines, the sequence of the lifting and lowering movements of the main body and arch and the packaging process must be set so that a larger number than necessary is banded and packed. This also resulted in large economic losses.

Furthermore, since the above-mentioned problems occur in relation to the internal dimensions of the arch and the external dimensions of the items to be packed, the standard vertical automatic packing system in which a band guide arch is installed perpendicularly to the horizontal upper surface of the packing machine body is used. This phenomenon also occurs in so-called horizontal automatic packing machines in which band guide arches are attached perpendicularly to the vertical sides of the machine and the packing machine body.

In order to eliminate the above-mentioned drawbacks of the arch horizontal type automatic packaging device, the applicant has already developed a mechanism for supplying, tightening, welding, and cutting packing bands in Utility Model Application No. 59-43301, as shown in FIG. In an arch horizontal type automatic packaging device having a band guide arch 5 attached to the packaging machine main body 1 in the horizontal direction, a bracket 17 is fixed to the lower surface of the horizontal arch 5 at an appropriate position near the front even corner part. One end of a crank 11 is fixed to the tip of a shaft 10 which is an operating rod of the fixed rotary solenoid 9, and a connecting rod is slidably supported on the other end of the crank 11 on a roller 15 pivotally connected to a receiver 16. One end of the connecting rod 12 is pivotally attached by a pin 13', and the other end of the connecting rod 12 is rotatably pivoted by a pin 13 near the center of the end of the band drop prevention lever 14. One end of the prevention bar 14, that is, the end near the pivot point with the connecting rod 12, is rotatably attached to the arch 5, and the other end of the band drop prevention bar is rotated horizontally toward the center of the arch. However, there is a limit to the length of the band fall prevention bar that can freely rotate to come into contact with the side of the object to be packed, and if the inner dimensions of the arch are large or the band to be packed is As the outer dimensions of the object become smaller, the tip of the band drop prevention bar connected to the solenoid hangs down a little, creating the problem that the band cannot be hung and packed in a strictly targeted position, that is, the arch position.

〔the purpose〕

This invention is applicable not only to arch horizontal packaging machines but also to vertical packaging machines.
This solves the above-mentioned drawbacks of the conventional technology that occur even in horizontal packaging machines, and regardless of the internal dimensions of the arch or the external dimensions of the packaged items, the band can always be reliably hooked horizontally to the target position of the packaged items to prevent packaging defects. To prevent this, and to eliminate unnecessary banding in consideration of packaging defects in an automatic packaging line, thereby improving packaging efficiency and economical efficiency.

〔composition〕

The structure of the present invention will be explained based on the illustrated embodiment. In an automatic packaging machine having a band guide arch attached to a packaging machine main body 1 having mechanisms for supplying, tightening, welding, and cutting packaging bands, the band Two opposing left and right sides 51 of the guide arch 5
2 guide bars 2 facing the band exit surfaces of a and 51b in a direction perpendicular to each other with a band passage allowable gap between them;
2, 22 and the guide bar 22,
22 is configured to be able to freely reciprocate in the longitudinal direction of the two opposing left and right sides 51a and 51b of the band guide arch.

[Effect]

Therefore, according to the present invention, the guide bars 22, 22 attached to the band ejection surfaces on the left and right sides of the band guide arch 5 are moved by the air cylinder 30, a driving means such as a motor, or manually to move the article 8 to be packed. The guide bar restricts the band ejection end that comes into contact with the side surface and pops out from the ejection surface when the band is pulled back, and guides it to the side of the object while holding the band, so that it is always on the same plane as the band ejection surface of the band guide arch 5. Wrap the band securely around the target position.

〔Example〕

Hereinafter, details of the present invention will be explained based on an embodiment illustrating an arch horizontal packing machine as shown in the drawings. Note that the same numbers are used for the same members as in the prior art.

1 to 5, 1 is a main body which incorporates various mechanisms necessary for packaging, 5 is a band guide arch, which is installed horizontally on the main body, and has a bandway 56 on the inner surface of a U-shaped arch frame 51. The bandway 5 is attached with a flap 53 which is divided into a plurality of parts and can be opened and closed by hinges 54 and 55.
It has a known structure in which the upper surface of the band is covered and forms a band running path and a band escape surface (FIG. 5).

Reference numeral 20 denotes a guide unit that guides the packing band toward the side surface of the object to be packed when pulling back or tightening the packing band, and as shown in FIGS. Cases 33, 3 with infinite linear motion bearings built into slide rails 32, 32 fixed to the sides
3 are slidably fitted together, reinforcing metal fittings 34, 34' are attached to the cases 33, 33, and the reinforcing metal fittings 34, 34' are bent in the width direction of both sides of the arch frame into a substantially L-shaped cross section. a pair of supporting plates 35,
35' are fixed respectively, and the supporting plates 3 face each other through the opposite left and right sides of the arch frame 51.
5, 35 and support plates 35', 35' are provided with lightweight metal guide bars 22, 2 having a U-shaped or rectangular cross section.
Both ends of the guide bars 22 and 22 are fixed to each other, and a band passage permitting gap is formed between the guide bars 22 and 22 on the band escape surfaces of the opposing left and right sides 51a and 51b of the arch frame 51.

Then, the flange 36 on one reinforcing metal fitting 34
Connect the tip of the rod 31 of the air cylinder 30 to. A convex flange 36' is fixed onto the other reinforcing metal fitting 34'.

Further, L-shaped brackets 39, 39' are attached to the one reinforcing metal fitting 34, and both ends of a single wire W are fixed to these brackets 39, 39' via mounting bolts 41, 41. ing. This wire W is connected to the arch frame 51
It is wrapped so that it moves around the sides of three sides.

That is, as shown in FIGS. 1 and 2, the wire W is wound from the bracket 39' around a pulley 43 which is rotatably attached to a bracket 23 fixed to the side surface of the main body 1 with its axis vertically, and then Two pulleys 44 are mounted on a bracket 24 fixed to the upper surface of the right corner of the frame 51, with their axes oriented vertically and rotatably stacked on top of each other, similar to the pulley 43.
The two pulleys 4 are wound around one pulley 44 of the arch frame 51 and are also supported in a superimposed manner on a bracket 25 fixed to the upper surface of the left corner of the arch frame 51.
6 and 47, turn around at the pulley 48 attached horizontally to the left side of the main body 1, pass through the insertion hole provided in the protrusion of the flange 36', and then pulley 47 and pulley 45 Then, it is fixed to another bracket 39' on the reinforcing metal fitting 34 via a mounting bolt 41.

The wire inserted through the convex flange 36' on the other reinforcing metal fitting 34' is fixed by a fixing pin 49 and a screw 61.

FIG. 3 shows another embodiment of the present invention, in which two pulleys 62 and 63 are connected to the tip of the rod 31 of the air cylinder, and both ends of the wire W are attached near one corner of the arch frame 51. It is fixed with the bolt 38 and the mounting bolt 37 on the side of the main body, and the order in which the wire W is wound is the mounting bolt 3 on the side of the main body.
7, one pulley 62 at the tip of the rod, a pulley 43 on one side of the main body, one of the two pulleys 44 at one corner of the arch frame, and one of the two pulleys at the other corner. It is attached near the corner of the arch frame from the other pulley 63 at the tip of the rod 31 through the tension pulley 64 and the pulleys 47 and 45 at both ends of the arch frame. It is configured to reach the bolt 38. The other configurations are the same as those of the previous embodiment. The air cylinder 31 is fixed to the side surface of the main body 1 via a bracket 26, and is connected to an air supply mechanism (not shown).

FIG. 4C shows a third embodiment of the present invention.
This invention is applied to a so-called horizontal packaging machine.
The guide bars 22, 22 are installed on two opposing sides 51c, 51b of the band guide arch 5 via U-shaped support plates 35, 35', and the upper support plate 3
5 is provided with a bearing portion 72 through which a guide pole 71 is inserted, and both ends of the guide pole 71 are attached to the upper arch 51a via brackets 72, 72. A guide roller 73 is provided on the opposing inner surface of the upper support plate 35 to support the arch 5 on the upper side.
It is rotatably supported in sliding contact with both side surfaces of 1a. A guide roller (not shown) also slides on the back bottom surface of the arch 51b on the lower side to freely rotate the lower support plate 3.
5', the guide bars 22, 22 face the band exit surfaces of the two opposing upper and lower sides 51a, 51b of the band guide arch 5, facing each other through a gap allowing the band to pass through, and the objects to be packaged on the roller conveyor 78. It is configured to be able to freely slide back and forth in the direction of contacting or moving away from this. Reference numerals 74 and 74 denote sliding rods, which are slidably supported by bearings 75 attached to the front arch between two opposing upper and lower sides, and whose tips are attached to the guide bars 22 and 22, respectively, to the brackets 7.
6 and 76, and a handle 77 is attached to the rear end.

Next, to describe the operation of the first embodiment, the rod 31 is now at its longest position, and the conveyor line 7 in FIG.
When moved inwardly and downwardly, the arch 5 descends together with the main body 1 to a predetermined position, and the main body 1 moves toward the object to be packed 8 . When the limit switch provided on the front surface of the main body 1 comes into contact with the object to be packed 8, the forward movement of the main body 1 is stopped. In response to the signal from the limit switch, the air cylinder 30 contracts the rod 31 within the time set by the timer, as shown in FIG.
The guide bar 22 is attached to the slide rails 32, 32 fixed to the outer surfaces of the two opposing left and right sides 51a, 51b of the arch frame 51 via the slidable cases 33, 33 by movement in the direction of the arrow.
22 moves in the direction of the object to be packed 8 and when it comes into contact with the object to be packed 8, it is stopped by the action of the relief valve. When the time set by the timer ends, the band pull-back mechanism inside the main body 1 is activated to pull the band back, and the flap 53 is pushed open so that the band pops out. Since they face each other via the guide bars 22, the band being pulled back is wound around the item 8 while being regulated by the guide bars 22, 22. Next, while the band is tightened to the object to be packed 8 by the band tightening mechanism in the main body 1, working air is supplied to the air cylinder 30 again and the rod 31 is extended, so the wire W moves in the opposite direction to the above-mentioned direction. guide bar 22,
22 also separates from the object to be packed 8 and stops at the longest position of the rod 31. During this time, the welding of the band overlapping portion in the main body 1 and the cutting mechanism on the band supply end side are operated, and the band is further supplied into the arch 5, completing one packing operation.

Regarding the second embodiment shown in FIG. 3, the difference from the above operation is that the rod 31 is in the most retracted position, and as the main body 1 approaches the object to be packed 8,
When the rod 31 is extended, the wire W on the pulley 62 side at the tip of the rod 31 is stretched, and the wire W on the pulley 63 side is slackened. , 22 approach the object to be packed 8 as the wire W moves in the direction of the arrow in the figure. The guide bars 22, 22 will move twice the distance that the rod 31 moves.

In the third embodiment shown in FIG. 4C, the handle 77 is pressed to push the guide bars 22, 22 against the objects to be packaged on the roller conveyor 78, and then the start button is turned on, and the band is gripped at the tip of the band. The process of pulling the band back and tightening is started, and after the tightening process is finished, the band is supplied into the arch 5 through the band welding process, and the guide bars 22, 22 are pulled by the handle 77 while the next item to be packed is being transferred. This will cause them to retreat.

In the above embodiment, the guide bars 22, 22
Although the guide bars 22, 22 are connected to the wires via reinforcing metal fittings 34, 34', the slide rails 32, 32 can be omitted in implementation. . In addition, in the case of a vertical packaging machine, the bottom right side of the second drawing is facing up to show the state in which the present invention is applied. In these vertical and horizontal packaging machines, the same functions and effects can be obtained by manually moving the guide bar back and forth as described above.

〔effect〕

As mentioned above, the present invention provides packing bands,
In an automatic packing machine having a band guide arch attached to the main body of the packing machine which has tightening, welding, and cutting mechanisms, a band passage allowable gap is provided in a direction perpendicular to the band exit surfaces on the two left and right sides of the band guide arch. Since two opposing guide bars are attached through the band guide arch and the guide bars are movable back and forth in the longitudinal direction of the two opposing sides of the band guide arch, the band can escape from the left and right or top and bottom two opposing sides of the band guide arch. is regulated by the two guide bars that contact the sides of the object to be packed and face the band exit surfaces on the two opposing sides. First, it enables accurate horizontal banding and packaging, and its practical effect is greater as the outer dimensions of the object to be packed are smaller relative to the inner dimensions of the arch.

[Brief explanation of drawings]

1 to 5 show embodiments of the present invention. FIGS. 1 and 3 are schematic diagrams showing the first and second embodiments of the present invention, respectively, and FIG.
4A is a partial side view of the air cylinder side, FIG. 4B is a partial sectional view of the convex flange side, and FIG. 4C is a third embodiment in which the present invention is applied to a horizontal packaging machine. FIG. 5 is an exploded perspective view of the band guide arch, FIG. 6 is a schematic diagram showing the main parts of the prior art, and FIG. 7 is an overall schematic diagram showing the general configuration of an arch horizontal packing machine. It is. 20... Guide unit, 22, 22... Guide bar, 36... Flange, 34, 34'... Reinforcement fittings, 35, 35'... Support plate, 51... Arch frame.

Claims (1)

[Scope of Claim for Utility Model Registration] In an automatic packaging machine having a band guide arch attached to a packaging machine body having mechanisms for supplying, tightening, welding, and cutting packing bands, two opposing sides of the band guide arch. Two guide bars are installed perpendicularly to the band exit surface of the band guide arch, and two guide bars are installed facing each other with a band passage allowable gap in between.
A guide unit for a packaging band in an automatic packaging machine, characterized in that it is configured to be movable back and forth in the longitudinal direction of the sides.