JPH0369766B2 - - Google Patents

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a method for packaging a cylindrical body, in which the unrolled end of a packaging sheet is adhered onto the cylindrical body at the same time as the wrapping of the packaging sheet is completed. Regarding the adhesion method.

[Prior art and its problems]

Large and heavy cylindrical bodies such as coiled steel plates must be wrapped around the inner circumference, outer circumference, and both ends. An automatic packaging process has been developed that sequentially performs these separate packaging operations on a continuous line. The end (the end of the roll) must be fixed on the cylinder by gluing or otherwise.
Since this fixed work is part of a continuous automatic process, it is desirable to shorten the work time as much as possible, simplify the work contents, and ensure that the work results are uniform and reliable.

Method 1 of fixing the end of the roll of conventional cylindrical packaging
As an example, the method using adhesive tape is shown in Figure 1A.
~D is shown schematically. First, in FIG. 1A, the tip of a packaging sheet P is pressed against the circumferential surface of a cylindrical body R to be packaged, such as a coiled steel plate, by a pressing roll a. While pressing the pressing roll a against the cylindrical body R, the roll a and the cylindrical body R are rotated in the direction of the arrow, and the packaging sheet P is fed out from the rear, and the packaging sheet P is gradually wound around the surface of the cylindrical body. When it gets close to one rotation, it will look like Fig. 1 B, and the winding start end will be reached.
P'' is pressed against the cylindrical body R by a pressing roll a, and the rear end of the packaging sheet is cut to the required length to become the winding end P'. As shown in Figure C, pressing roll a
, then rotate the cylindrical body R slightly in the direction of the arrow (solid line) so that the winding start end P'' slides under the winding end P''.In this way, P' becomes P'' If they overlap, the first
As shown in Figure D, the adhesive tape t is pasted vertically from one end of the cylinder to the other, but before that,
Since the end of winding P' is floating above the surface of the cylinder, it must be held in place by an appropriate method so that it is brought into close contact with the surface of the cylinder. Pressing roll a
It is time consuming and inconvenient to reverse the winding end P′ as shown by the dashed arrow and push the winding end P′ from behind it onto the winding start end P″, and even if it were possible to reverse the winding quickly, it would be inconvenient. When applying the adhesive tape t onto the overlap between P' and P'', the pressing roll a must be removed. Therefore, the most efficient method is usually to temporarily attach short pieces of tape to two or three locations on P' by hand. After temporarily fixing it in this way, attach the adhesive tape t as shown in Figure 1D.
is run longitudinally from one end of the cylindrical body R to the other end using a roll T, and the adhesive tape t is pasted onto the winding end P' to complete the outer wrapping. Fixing the end of the winding with longitudinal adhesive tape is easier and faster than other methods, such as applying adhesive, and has a strong adhesive force, so it can be immediately transferred to the subsequent process, rolling the cylinder, or otherwise roughing it. This is a preferable method because the rolled ends will not peel off even when handled.

Although this method of fixing the end of the roll has been accepted as a preferred method to date, it still needs to be improved from the standpoint of increasing the efficiency of the process by applying it to the continuous automatic packaging process as described above. There is a great deal of room to do so. For example, the end of the winding P' is not evenly pressed onto the cylindrical body from the back side by a pressing roll or the like, so in some cases it may be temporarily fastened in a loose state. In addition, it would be desirable as an automated process to omit temporarily fixing the end of the winding end P' onto the cylinder, and the time and effort required to run the adhesive tape vertically at the packaging work position should also be considered. . Furthermore, if adhesive tape is pasted over the temporary fixing tape, the finished product will be uneven and look unsightly.

[Purpose of the invention]

Therefore, the present invention has been made to solve all of these problems, and its purpose is to provide a simple method for cylindrical packaging in which the unrolled end of the packaging sheet is brought into contact with and pressed onto the cylindrical body, and at the same time is adhesively fixed.・An object of the present invention is to provide a quick and reliable method for bonding the end of a cylindrical package.

The method of the present invention is simple because it does not require work that goes against automation, such as temporarily fixing the end of the winding. It is reliable because it is attached, and it is quick because the end of the winding is wound around the cylindrical body and glued at the same time.

[Summary of the invention]

In the method of the present invention, before starting wrapping, an adhesive tape is attached to one end of the packaging sheet (the end that will later become the end of winding), for example, by about half of the width, and when starting wrapping, the opposite end of the packaging sheet is pasted. Press and wrap the packaging sheet onto the cylindrical body to be packaged sequentially from the first end toward the one end, and continue this pressing operation until the remaining approximately half of the width of the adhesive tape is adhered onto the cylindrical body. By doing so, the adhesive fixation of the end of the winding can be completed instantly at the same time as the winding is completed. In order to shorten the work time at the wrap-around packaging work position, it is better not to perform preparatory activities such as gluing half-width adhesive tape to one end of the packaging sheet and cutting the packaging sheet to a predetermined length directly above the cylindrical body to be wrapped. Therefore, it is preferable to perform the above-mentioned preparatory act in advance on the side of the cylindrical body to be packaged so that the preparation is completed and the packaging sheet is kept on standby.

A suitable means for this waiting is to use a temporary roll that can rotate in both directions and has a surface that is easily releasable to the adhesive tape. The one end of the packaging sheet is temporarily bonded onto this temporary roll at a lateral position using an adhesive tape. Approximately half of the width of the adhesive tape is on one end of the packaging sheet and the other half is on the surface of the tack roll. The adhesion on the surface of the temporary roll is temporary adhesion, and when a tensile force in a substantially normal direction is later applied to the temporary adhesion, the adhesive tape is easily and cleanly peeled off from the temporary roll. However, even though it is temporary adhesive, it does not peel off easily against the tensile force in the tangential direction, so this temporary adhesive force can be used to roll a predetermined length of packaging sheet onto the temporary wrapping roll by rotating the temporary wrapping roll. Keep it on.

If this temporary winding roll is moved onto the cylindrical body to be wrapped, the winding and packaging operation can be immediately started there without any preparatory action. Wrapping involves pressing or temporarily holding the opposite end of the one end (winding start end) of the packaging sheet onto the cylindrical body, and sequentially pressing the packaging sheet against the cylindrical body from there toward the one end (winding end end). Then, this pressing position can be rotated around the cylindrical body. As a result, the temporary winding roll rotates in the opposite direction to that described above, and the wrapped packaging sheet is discharged onto the cylindrical body. The tensile force that unwinds the packaging sheet from the temporary roll finally acts on the temporary bonded portion at the end of the winding in a substantially normal direction or outward in the radial direction, so that the adhesive tape is easily peeled off from the temporary roll. , moves onto the cylindrical body and is bonded onto the cylindrical body under the action of the rotating pressing position. This is at the same time that the end of the roll is pressed onto the cylinder. The above-mentioned temporary holding is released when the circulating pressing position approaches.

The rotating pressing position is suitably achieved by using a pressing roll that can rotate around the cylindrical body while contacting it. It is preferable that the pressing roll and the pre-winding roll are connected and rotated as a set on the circumferential surface of the cylindrical body.

Thus, according to the present invention, all preparatory actions are completed in the standby position, and only the pressing and winding operations need to be carried out on the cylindrical body to be packaged, and at the same time, the gluing of the finished ends is also continuously performed. Since it is completed instantly, it is possible to carry out outer packaging extremely quickly, which significantly improves the efficiency of the automatic integrated packaging process.

[Embodiments of the invention]

Next, a preferred embodiment will be described with reference to FIG. 2 and subsequent figures which sequentially show the steps of the method of the present invention.

First, in FIG. 2, the packaging sheet P is pulled out from the original fabric roll 1, and the adhesive tape 3 is applied to the circumferential surface of the pre-wound roll 2, whose tip P' is rotatable in both directions.
temporarily adhere. The tip P' becomes the end of the winding when it is later wrapped around the cylindrical body R to be packaged (Fig. 6 and below). It is also used for temporary adhesion to the roll 2, and exerts enough force to pull the packaging sheet P in the tangential direction of the roll 2. Preferably, the pre-wound roll 2 has a surface with good releasability, for example, a roll with chrome plating on the surface, since no adhesive will be left on the roll surface when the adhesive tape 3 is peeled off from the roll.

The length of the adhesive tape 3 should be at least equal to the surface length of the cylindrical body R, and the length of the temporary roll 2 should also be approximately the same. It is not impossible to install the temporary roll 2 and the raw roll 1 in the space above the cylindrical body R, but the cylindrical body R is conveyed on a line where the inner periphery, outer periphery, and both end surfaces are consistently wrapped. In this case, it is preferable to install it above the lateral side of the cylindrical body R, that is, above the axial extension line of the cylindrical body R that enters the outer circumferential packaging work position, since it does not interfere with the conveyance line or the like.

As shown in FIG. 2, about half of the width of the adhesive tape 3 is adhered to the leading edge P' of the packaging sheet, and the other half is adhered to the temporary winding roll 2. Adhesion can be carried out by any suitable method, but as an example, as shown in FIG. It is also possible to use a cutter 6 to cut the tape to the required width while crimping it, or as another example, as shown in FIG. Alternatively, the adhesive tape 3 may be pasted from the tape source 8 through the pressure roll 5 onto the tip P' that should be the end of the winding, and then cut to the required length with the cutter 10.

In any case, the adhesive tape 3 has a considerable resistance force and is difficult to peel off even if a tensile force is applied in the tangential direction to the part temporarily bonded to the temporary roll 2, but if it is pulled in the normal direction ( 8a) has a weak resistance and peels off relatively easily. In this case, if the surface of the temporary roll 2 is chromed as described above, the adhesive tape 3 can be peeled off from the roll 2 particularly easily and cleanly.

Utilizing the strong force in the tangential direction, after temporary adhesion as described above, the temporary winding roll 2 is rotated in one direction as shown by the arrow in FIG. 4, and the packaging sheet P is wound up while being pulled. This rotation can be performed, for example, by contact driving of the contact roll 11.
At this point, the packaging sheet P that is currently being rolled up
Although the cylindrical body to be wrapped by the cylindrical body has not yet entered the outer wrapping position, the diameter of the cylindrical body is detected in advance and information regarding the length of the packaging sheet P to be wrapped around the cylindrical body is obtained as a source. This is applied to the unwinding mechanism (not shown) of the anti-roll 1. Thereby, the rear end of the packaging sheet P is cut 12 at a predetermined length to form an end that will later become the start end P'' of winding into the cylinder (Fig. 5). A temporary winding roll 2 whose ends P" are temporarily bonded with an adhesive tape 3 and whose winding start end P" is the outermost side is ready and waiting on the side of a cylindrical body that is about to be packaged.

As soon as the desired cylindrical body R is carried into a predetermined position, as shown in FIG. Temporarily held 13 at the position.Temporarily held, for example, the 1
This may be carried out using one or several rod-shaped bodies.

Then, the packaging sheet near this temporary holding position 13 is pressed onto the cylindrical body R. The pressing may be performed, for example, by a pressing roll 14 that can rotate and go around the cylindrical body while being in pressure contact with the cylindrical body. Preferably, this pressing roll 14 is the temporary winding roll 2
It is preferable to connect and combine them, and to rotate them as a set in the direction of the arrows in FIGS. 6 and 7. This way,
The wrapping sheet P is held down at the winding start end P'' and is sequentially pressed onto the cylindrical body R by the circumferential pressing roll 14, and the force causes the temporary winding roll 2 to rotate in the opposite direction (arrow in FIG. 7). As it is unwound, it is gradually wound onto the cylindrical body R as shown in Fig. 7. Eventually, as shown in Fig. 8, when the set of temporary winding roll 2 and pressing roll 14 makes one revolution, just before that The rod-shaped body is pulled up from the temporary holding position 13, and the winding end P' is pressed together with the adhesive tape 3 onto the winding start end P'' and bonded.

Before this, the end of the winding from temporary winding roll 2
The peeling off of P' and the adhesive tape 3 is schematically illustrated in FIG. 8a. The rear part of the packaging sheet pressed onto the cylindrical body R by the pressing roll 14 (the area marked P in FIG. 8a) applies a tensile force on the temporary winding roll 2 in a direction approximately normal to the temporarily bonded part. As a result, the adhesive tape 3 can be peeled off from the temporary roll 2 very easily and cleanly. The adhesive tape 3 then passes under the pressure roll 14 and starts wrapping at the end, as can be seen in FIG.
Glue the winding end P' onto P''.

This final state of bonding is shown schematically in FIG. 8b. The end winding end P' is pressed again from above the winding start end P'' which has been released from the temporary holding, and the adhesive tape 3 is pressed and bonded from above the winding end P'. The overlapping or unrolled ends are adhered to the cylindrical body without loosening.

In addition, although the drawing shows the case where the packaging sheet P is wrapped once, the number of wrappings can be changed as needed.
The length of winding onto the temporary winding roll 2 may be determined depending on the required number of times. Furthermore, although the position at which the winding end P' is bonded onto the cylindrical body is shown as being close to the winding start end P'', this can also be set at another position if necessary.

Pre-rolled roll 2 with the end of the winding finished being glued
Immediately, the pressing roll 14 (if paired with it) is returned to the standby position for the next preparatory action and to open a path for the removal of the cylindrical body R, whereupon the packaging sheet is immediately Perform preparations such as temporary gluing, winding, and cutting.

〔Effect of the invention〕

As explained above, according to the present invention, as soon as the cylindrical body to be wrapped enters the outer circumferential wrapping position, the wrapping sheet of a predetermined length is wrapped, and as soon as the wrapping is finished, the wrapped end is firmly secured. Since it is adhesively bonded, compared to the conventional method in which incidental work such as temporary fixing is performed at the position where the winding is finished, and then the longitudinal adhesive tape is attached, the work time is significantly shortened and the work content can be reduced. Since it can be extremely simplified and the quality of the packaging can be improved, it is possible to realize a fully automatic integrated packaging process even for large heavy cylinders, and it is expected to significantly improve its efficiency.

[Brief explanation of drawings]

Figure 1 shows an example of conventional cylindrical outer circumference packaging, where A shows the beginning of winding, B shows the near end of winding, C shows the relationship between the end of winding and the beginning of winding, and D shows the method of gluing the end of winding. are shown respectively. Figure 2 shows the temporary adhesion of the end of the wrapping sheet to the temporary roll in a preferred embodiment of the present invention, Figure 3 shows a means of applying adhesive tape that is different from that shown in Figure 2, and Figure 4 shows the progress of winding the temporary roll. , Figure 5 shows that the winding on the temporary roll is almost completed, Figure 6 shows the start of winding the packaging sheet onto the cylindrical body to be wrapped, Figure 7 shows the progress of the wrapping, and Figure 8 shows the winding being completed at the same time. Each stage of completion of adhesion is shown. Figure 8a shows a state in which the temporary adhesive at the end of the winding roll is peeled off, and Figure 8b
The figures each schematically show the state in which the end of the winding has been bonded. [Main symbols] R...Cylinder to be wrapped, P...Packaging sheet, P'...End of winding, P''...End of winding, 2
...temporary winding roll, 3...adhesive tape, 13...temporary holding position, 14...pressing roll.

Claims (1)

[Claims] 1. A method of wrapping a cylindrical body by wrapping a packaging sheet of a predetermined length having a winding start end and a winding end end around the circumferential surface of a cylindrical body, and gluing the winding end end.
A method for adhering the winding end of a cylindrical package, characterized by the steps (i) to (iv). (i) After pasting a part of the adhesive tape to the end of the wrapping sheet and pasting the rest to the surface of the temporary wrapping roll, rotate this temporary wrapping roll to temporarily wrap a specified length of packaging sheet. (ii) The trailing end of the temporarily rolled packaging sheet, that is, the winding start end, is brought into contact with the circumferential surface of the cylindrical body to be wrapped and temporarily held, and the temporary winding roll is rotated along the circumferential surface. Rewind the packaging sheet by rotating it in the opposite direction to the case (i) above, and hold it tightly against the circumferential surface of the cylindrical body to be packaged using a press roll that goes around the cylindrical body to be packaged together with a temporary winding roll. (iii) releasing the temporary holding of the starting end of the wrapping sheet when the wrapping end of the wrapping sheet approaches the temporary holding position; (iv) holding the wrapping sheet in place even after passing the temporary holding position; A process in which the roll continues to press the packaging sheet, and the remaining part of the adhesive tape, which is partially affixed to the end of the roll, is pressed and adhered to the outer surface of the packaging sheet. 2 The remainder of the width of the adhesive tape is temporarily adhered to a temporary roll having a surface with good releasability and which can be freely rotated in both directions, and the temporary adhesion of the temporarily adhered tape is performed by rotating this temporary roll in one direction. After winding the packaging sheet onto a temporary roll by force,
The method according to claim 1, wherein the method is made to stand by. 3. The packaging sheet between the temporary holding position and the temporary winding roll is pressed against the surface of the cylindrical body by a pressing roll that can orbit around the cylindrical body while contacting the cylinder to be packaged, thereby causing the temporary winding roll to move to the above-mentioned position. 3. The method according to claim 2, wherein the packaging sheet is wound around the cylindrical body by rotating the packaging sheet in the opposite direction. 4. The method according to claim 2, wherein the temporary winding roll is kept on standby above the axial extension line of the cylindrical body to be wrapped, and the temporary winding roll is arranged substantially parallel to the cylinder to be wrapped when the winding operation starts. . 5. The method according to claim 3, wherein the pressing roll and the temporary winding roll are integrally connected and rotated around the cylindrical body to be packaged. 6. The method according to claim 4, wherein the circumferential length of the cylindrical body to be packaged is detected in advance, and a packaging sheet having a length corresponding to the circumferential length is wound on the temporary winding roll located at the standby position.