JPH0735191B2 - Sheet piece holding device for container mouth encapsulation device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container mouth wrapping device for wrapping a thermoplastic thin film sheet made of polyethylene or the like in the mouth of various containers such as milk bottles. In particular, it relates to the sheet piece holding device.

[0002]

2. Description of the Related Art Conventionally, in the technique of encapsulating the mouth of a container of this type, when a strip-shaped sheet or a sheet piece as an encapsulating material is supplied to the main body of the apparatus in which the encapsulation work is performed, the sheet is sealed. A supply method was adopted in which the surface is supplied in a horizontal state (Japanese Patent Publication No. 36-18744, Japanese Patent Publication No. 36-19090, Japanese Patent Publication No. 50-11828). By the way, in this horizontal feeding method, the sheet is cut into sheet pieces of a required length in advance, and the sheet pieces are delivered to the sheet piece holding means on the apparatus main body side, so that the sheet feeding means side and the sheet Does not fit in with the separation structure that separates the device main body side that covers the container from the mouth of the container. Therefore, this separation structure is not adopted. Therefore, the structure of the connecting portion between the main body of the apparatus and the sheet feeding means is extremely complicated, which is an obstacle to increasing the working speed. In addition, it has not been possible to deal with the case where the size of the sheet piece is desired to be changed according to the type of the container.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and can smoothly deliver a sheet piece to an apparatus main body for encapsulation work, and further, hold the sheet piece. It is an object of the present invention to provide a sheet piece holding device in a container mouth wrapping device, in which the operation of a segment for use in the container is accurate and the size of the sheet piece can be changed.

[0004]

DISCLOSURE OF THE INVENTION The present invention relates to each encapsulating head which is integrally supported with respect to a rotating shaft of a main body of an apparatus and covers a mouth of a container with a sheet piece while revolving around the rotating shaft. On the other hand, a rotating arm having a sheet piece holding segment having an opening formed at the center thereof through which the mouth of the container can be inserted is rotatably supported, and the other end of the rotating arm is supported. Via a link mechanism to a cam follower that moves along the cam surface of the cam plate installed on the fixed side of the apparatus body, and in the delivery area for receiving the delivery of the sheet piece from the vertical axis rotating drum for delivery, The segment piece adsorbing and holding surface of the segment is maintained in a vertical state, and the sheet adsorbing and retaining surface is maintained in a horizontal state in the work area for enclosing the sheet piece in the mouth of the container. is there.

[0005]

By adopting the above technical means, the sheet piece supplying step and the sheet piece wrapping operation step can be separated between the delivery vertical axis rotary drum and the sheet piece holding segment, so that the structure is simplified. This is effective for improving work speed and reducing troubles. Further, since the segment for holding the sheet piece is rotatably supported by each encapsulating head itself and is controlled by the cam mechanism in the vertical state and the horizontal state, its operation and its timing are accurate. Further, when it is necessary to change the size of the encapsulating sheet piece according to the type of the container, the sheet piece can be delivered by cutting it into a sheet piece having a required length in the process of the sheet piece supply step. So it can be easily handled.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic plan view showing an overall layout of an embodiment of the present invention, which includes a conveyor 1, an apparatus body 2 for enclosing a sheet piece in the mouth of a container conveyed by the conveyor 1, and a container. The main elements are a ribbon hooking device 3 for hanging a fastening ribbon on a sheet piece wrapped in the mouth of the sheet, a sheet piece feeding device 4 and a ribbon feeding device 5.
The container conveyed on the conveyer conveyor 1 is transferred to the apparatus main body 2 through the introduction path composed of the star wheel 7 and the guide 8 at predetermined intervals by the infeed screw 6 at a predetermined timing. In the apparatus main body 2, the sheet pieces are delivered from the sheet piece supply device 4 in the delivery area A. In this sheet piece supply device 4, a belt-shaped sheet 10 is supplied from a supply roll 9 to a roller 11 for tensioning.
While applying a predetermined tension by using, a feed roller 12 for feeding and a pinch roller 13 feed out at a predetermined speed. When the belt-shaped sheet 10 is adsorbed and transferred on the vertical axis rotating drum 14 for cutting, the belt-shaped sheet 10 is cut into a sheet piece having a predetermined length by an appropriate cutting mechanism 15 using a heat cutter or the like. This sheet piece is adsorbed and held on the cylindrical outer peripheral surface of the vertical axis rotating drum 16 for delivery, and in the delivery area A, is delivered to the arc-shaped adsorption holding surface of the sheet piece holding segment on the apparatus body 2 side. In this case, the vertical axis rotating drum 14 for cutting, the vertical axis rotating drum 16 for delivering, and the sheet piece suction holding means in the segment for holding the sheet piece on the side of the apparatus body 2 serve as a suction holding means for the sheet. A means for vacuum suction through the provided through hole is used. Then, the delivery between them is performed by performing on / off control of the vacuum state in accordance with the delivery timing angle. In the figure, 17 indicates a supply roll for a spare.

In the work area B, as will be described later,
A work of covering the mouth of the container with the sheet piece by sucking and holding the sheet piece and rotating the segment of the apparatus main body 2 in a horizontal state and inserting the mouth portion of the container into the opening formed in the segment. The process is performed. In the heating region C, the hot air supplied from the hot air supply means 18 is guided to the sheet piece portion covering the mouth of the container to cause the heat shrinkage. In the cooling region D, cold air from a cold air supply means described later is guided to the sheet piece portion to cool it. In this way, the container in which the sheet piece is covered in the mouth is discharged from the discharge area E, and is transferred to the ribbon hooking device 3 via the guide path including the star wheel 19 and the guide 20. As in the case of feeding the sheet pieces, the ribbon-hanging device 3 is fed with a belt-shaped ribbon 22 from a feed roll 21 while a predetermined tension is applied by a tension roller 23, and a feed roller 24 for feeding. And it is sent out at a predetermined speed by the pinch roller 25. The ribbon 22 is applied with hot melt by a hot melt supply means 26 on the way and then supplied to a known ribbon hanging device 3 to carry out a ribbon hanging operation on a sheet piece portion covered by the mouth portion of the container. Is done. The container for which the ribbon hanging operation has been completed is discharged onto the transport conveyor 1 through a discharge path formed by the star wheel 27 and the guide 28. In the figure, reference numeral 29 is a spare supply roll, and 30 is a heating means.

Next, with reference to FIGS. 2 and 3, the work of wrapping the sheet piece in the mouth of the container will be described. Figure 2
Is a vertical cross-sectional view showing the main part of the apparatus main body 2, and FIG.
FIG. 3 is a plan view showing a main part of the apparatus main body 2 with a partial cross section. In the figure, 31 is a fixed shaft, 32 is a rotary shaft, and 33 is a bearing portion thereof. A cam plate 34 is fixed to the fixed shaft 31, and a rotary plate 35 is fixed to the rotary shaft 32. An appropriate number of encapsulating heads 36 are arranged on the outer peripheral portion of the rotary plate 35. A pressing member 38, which is pressed downward by a spring 37, is slidably incorporated inside each encapsulating head 36, so that the upper surface of the mouth of a container 40 that is moved up and down by an elevating table 39 is pressed, and thus the sheet The piece 41 is pressed and supported between the pressing member 38 and the upper surface of the mouth portion of the container 40. An annular sheet piece squeezing member 42 composed of a coil spring or the like is disposed below and inside the container 40.
As the sheet rises, the sheet piece 41 is squeezed so as to cover the mouth of the container. Further, on the outside of each encapsulating head 36, the segment 4 having an arc-shaped sheet piece suction holding surface is provided.
3 is rotatably supported by a rotary arm 44 about a support shaft 45. At the other end of the rotating arm 44 on one side of each segment 43, a connecting rod 46, a lower arm 47,
A link mechanism composed of a rotary shaft 48 and an upper arm 49 is connected, and is configured to be rotated by a cam follower 50 that moves along a cam surface formed on the outer peripheral surface of the cam plate 34 via the link mechanism. . In the figure, 51 is a return spring connected to the lower arm 47. Also,
A vacuum pipe 52 for adsorbing and holding a sheet piece is connected to each segment 43, and is connected to a vacuum means such as a vacuum pump (not shown) via a joining means 53 such as a rotary joint. In the figure, 54 is each segment 4
3, an opening for inserting the mouth of the container 40 formed in the center of
Reference numeral 55 denotes a hot air supply opening communicating with the hot air supply means 18 in the heating region C, and 56 denotes a cold air supply pipe connected to the cool air supply means such as a blower (not shown) via the joining means 53.

The sheet piece 41 cut into a predetermined length by the cutting mechanism 15 is, in the delivery area A,
Segment 43 from the vertical axis rotary drum 16 to the apparatus main body 2 side
To be delivered to. During this delivery, segment 4
As shown on the left side of FIG. 2, 3 is in the vertical state, and in this state, the sheet piece 41 is delivered from the vertical axis rotary drum 16. As the rotary plate 35 rotates, the upper arm 49 pivots outward along the cam surface of the peripheral surface of the cam plate 34 via the cam followers 50 as shown in FIG. As a result, the segment 43 includes the rotating shaft 48, the lower arm 47, the connecting rod 46, and the rotating arm 44.
Is rotated to a horizontal state. In parallel with this, the container 40 is transferred onto the elevating table 39 of the apparatus main body 2 at a timed timing by the star wheel 7, and the elevating table 39
Rises with the rise of. As a result, the mouth of the container 40 is inserted through the opening 54 formed in the center of the segment 43, as shown on the right side of FIG. At this time, the sheet piece 41 sucked and held by the segment 43 is pressed and supported between the upper surface of the mouth of the container 40 and the pressing member 38 and pulled upward, and at the same time, the sheet piece squeezing member 42 moves the sheet piece 41 of the container 40. It is squeezed along the outer shape of the mouth portion and covered on the mouth portion of the container 40. In this state, when moving to the heating area C,
The outlet of the hot air supply means 18 communicates with the opening 55,
Hot air is supplied to the portion of the sheet piece 41 to cause thermal contraction. As a result, the sheet piece 41 comes into close contact with the mouth of the container 40. Further, when moving to the cooling region D, since the cool air is supplied from the cold air supply pipe 56 to the portion of the sheet piece 41 through the gap of the sheet piece throttle member 42, the shape of the sheet piece 41 is fixed. In this way, the container 40 whose mouth is covered with the sheet piece 41 is discharged in the discharge area E, and the sheet piece 4 is discharged in the next ribbon hanging device 3.
After one portion is fastened by the ribbon 22, it is discharged onto the conveyor 1. When it is necessary to change the size of the sheet piece 41 due to a change in the type of the container, the sheet width is changed to an appropriate sheet width by using the spare supply roll 17 or the like, and the cutting mechanism is used. This can be easily handled by adjusting the cutting timing of 15 and adjusting the length.

[0010]

According to the present invention, the following effects can be obtained based on the above constitution. (1) A sheet piece holding segment is rotatably supported so that it can be in a vertical state or a horizontal state, and a sheet piece supply process until delivery of the sheet piece and a sheet piece wrapping operation to the mouth of the container Since the process is separated, the sheet piece supply structure can be simplified and the sheet piece size can be easily changed depending on the type of the container. (2) Since the sheet piece is delivered while the suction holding surface of the sheet holding segment is maintained in the vertical state, the sheet piece can be delivered smoothly, improving the work speed and reducing troubles. Is effective for. (3) Since the segment for holding the sheet piece is rotatably supported by each encapsulating head itself and is controlled by the cam mechanism in the vertical state and the horizontal state, the rotational movement and the timing thereof are accurate. .

[Brief description of drawings]

FIG. 1 is a schematic plan view showing an overall layout of an exemplary embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing the main parts of the apparatus main body 2 in the embodiment.

FIG. 3 is a plan view showing a main part of the apparatus main body 2 with a partial cross section.

[Explanation of Codes] 1 ... Conveyor 2 ... Device main unit 3 ... Ribbon hanging device 4 ... Sheet piece supply device 5 ... Ribbon supply device 9 ... Supply roll 10 ... Strip sheet 12 ... Feed roller 13 Pinch roller 15 Cutting mechanism 16 Vertical axis rotating drum for delivery 17 Spare supply roll 18 Hot air supply means 21 Supply roll 22 Ribbon ribbon 30 Heating means 31 Fixed shaft 32 Rotating shaft 34 Cam plate 35 Rotating plate 36 Encapsulating head 38 Pressing member 39 Elevating table 40 Container 41 Sheet sheet 42 43 ... segment for holding and adsorbing sheet piece 44 ... rotating arm 46 ... connecting rod 47 ... lower arm 49 ... upper arm 50 ... cam follower 52 ... vacuum pipe 53 ... Joining means 54 ... Opening for inserting container mouth 55 ... Opening for hot air supply 56 ... Cold air supply pipe

Claims (1)

[Claims] 1. A container which is integrally supported with respect to a rotation shaft of a main body of the apparatus and covers the mouth of the container with a sheet piece while revolving around the rotation shaft, and the container is provided at the center thereof. A rotatably supporting a rotary arm having a sheet piece holding segment having an opening through which the mouth part of the sheet is inserted and fixed to the tip end, and the other end of the rotary arm is rotatably supported by a link mechanism. In the transfer area, which is connected to a cam follower that moves along the cam surface of a cam plate installed on the fixed side of the main body of the apparatus and receives the transfer of the sheet piece from the vertical axis rotating drum for transfer, the sheet piece suction holding surface of the segment And a sheet piece of a container mouth portion encapsulation device, characterized in that the sheet suction holding surface is kept horizontal in the work area for enclosing the sheet piece in the mouth portion of the container. Holding device.