JPS61203018A - Stop position control device for tail end of rolled paper - Google Patents

Abstract

PURPOSE:To enable the tail end of a rolled paper to be stopped at the stated position regardless the diameter of the rolled paper by swinging the tail end detector based on the signal detected by a detecting lever for the diameter of the rolled paper so as to allow the detector to be directed to the appropriate detecting position. CONSTITUTION:A pair of rollers 2 is arranged along the end edge of a table 1 on which a rolled paper R rolls, and a detector 10 at the lower end of a detecting lever 3 which is rotatably supported, is placed above the roller 2. Simultaneously, a tail end detector 4 which detects the tail end of the paper is arranged above the table 1. And the tail end detector 4 is connected with the detecting lever 3 by way of an interlocking device 12-14. This allows the rotating roller 2 to be stopped when a certain period of time elapses after the tail end detector 4 has detected the tail end of the paper allowing the tail end on the roller to be stopped at the regular position. This configuration enables the rolled paper to be mechanically stuck from the outside of the paper after the stated length of the paper has been taken up onto a core and been cut off.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides a method for attaching the trailing end of a paper roll of a predetermined length to a fixed position regardless of the diameter of the first roll of paper. This invention relates to a stop position regulating device for the trailing end of the paper roll.

<Prior Art> As is well known, wrapping papers such as toilet paper, etc. are glued to the tail in a thin strip at a position slightly away from the end so that it can be easily peeled off during use. Conventionally, when pasting the tail of a wrapping paper like this, a paper of a predetermined length 5 is wound around a core material,
I was gluing the paper almost at the same time as cutting it.

<Problems to be Solved by the Invention> However, in this processing method, glue is applied to the inside of the paper, so the adhesive force is too strong and the second and third sheets of paper are torn and difficult to use. , will be wasted. Therefore, it has been desired to develop a technique in which a predetermined length of paper is wound up, cut, and then pasted from the outside of the paper.

In order to cut the paper after winding it to a predetermined length and pasting the area near the cut end, the trailing end of the cut paper must be re-rolled and the trailing end must be placed in a fixed position regardless of the diameter of the paper. must be stopped.

However, since the paper is very thin, it is extremely difficult to mechanically detect the tail after it has been rolled, and the paper does not always have the same diameter. For example, there are rolls of paper the length of toilet paper, and the diameter of the roll varies depending on the length of the paper. Therefore, even if the winding operation is stopped after a certain period of time has passed since the trailing end is detected during winding, the trailing end will stop I-
The position is inconsistent.

<Means for Solving the Problems> The present invention was proposed in view of the above, and includes a pair of rollers provided along the edge of the table on which the paper roll rolls, and a detection rod on the side of the rollers. A trailing detector for detecting the trailing edge of the paper is provided above the table in a rotatable manner, with the lower end detection section facing the table, and the trailing detector is connected to the detection rod via a mechanical interlocking means. did.

<Operation> According to the configuration described in the present invention, the detection rod swings in accordance with the diameter of the paper wrapped on the roller, and the trailing detector rotates in response to this swinging state, thereby detecting the tail in the table. The detection position can be adjusted. Therefore, when the rotation of the roller is stopped after a certain period of time has elapsed since the tail detector detects the tail of the paper, the tail of the paper can be stopped at a fixed position regardless of the diameter of the paper.

<Example> The present invention will be explained below based on embodiments shown in the drawings.

The stop position regulating device at the tail end of the paper roll consists of a table l placed after a winding device (not shown) that cuts a predetermined length of paper after winding it up, and a pair of tables installed along the sloping lower end of the table l. It is composed of rollers 2, 2, a detection rod 3 facing above the rollers 2, 2, and a trailing detector 4 provided above the table 1 facing downward.

The table l is sufficiently wider than the diameter of the paper roll,
The surface is slightly inclined downward toward the rollers 2,2. Therefore, when the rolled paper fed out from the winding device is transferred to the table 1, it rolls due to the inclination and can be placed on the rollers 2, 2''. Note that the wrapping paper is placed on the rollers 2 while rotating in the direction of unraveling the paper. Therefore, the paper at the end of the roll extends on the table 1 in an unraveled state.

The rollers 2, 2 are arranged at appropriate intervals to support the paper roll, and an endless chain is connected to a sprocket 6 fixed to the end of the shaft 5 of each roller 2, 2 and a sprocket of a first drive source 7 consisting of a motor or a speed reducer. Multiplying 8 is passing. therefore,
When the first drive source 7 operates, the rollers 2, 2 rotate, the paper roll rotates, and the paper extended on the table l can be wound up.

The detection rod 3 that detects the diameter of the rotating paper roll in this manner is a bar having an appropriate length, and its base end is fixed to a support shaft 9 rotatably supported above the table l. The detection part lO at the lower end, which swings around the support shaft 9, is connected to the rollers 2, 2''.
It's time for the second one.

Therefore, when the wrapping paper that has been rolling on the table L is placed on the rollers 2, 2 and comes into contact with the detection unit 10, the detection rod 3 is moved in the longitudinal direction of the wrapping paper around the spindle 9 according to the diameter of the wrapping paper. oscillates in the direction perpendicular to the The detection rod 3 then transmits this swinging motion to the rear detector 4 via mechanical interlocking means.

The trailing detector 4 is equipped with a light emitter and a light receiver, and emits light from the light emitter onto the top surface of the table l, and receives the reflected light by the light receiver. The device detects the presence or absence of paper based on the difference in reflectance between the table 1 and the table 1. It is fixed to a rotating rod 11 rotatably supported above the table 1, and is focused on the top surface of the table 1. The trailing detector 4 is electrically connected to the first drive source 7 through an electrical control device (not shown) having timer means.

An embodiment of the mechanical interlocking means that rotates the rear detector 4 by rotating the detection rod 3 includes the tip of the first arm 12 fixed to the support shaft 9 and the tip of the second arm 13 fixed to the rotation shaft. are connected by a connecting rod 14, and when the detection rod 3 swings, the rear detector 4 rotates in the same direction. By appropriately setting the lengths of the first arm 12 and the second arm 13, the rotation angle of the rear detector 4 relative to the rotation angle of the detection rod 3 can be adjusted.

As shown in FIG.
As shown by the solid line in the figure, the first. 2nd arm 1
2.13, etc., the tail detector 4 rotates in the direction of the counterclockwise direction as shown by the solid line in FIG. 2, and the tail detection position moves to A.

When the paper on the table 1'' is gradually wound up by the rotation of the roller 2.degree. When the electric control device receives the signal, it starts the timer means and stops the first drive source 7 after a certain period of time has elapsed. The fixed time set in the timer means is the time from when the tail detector 4 detects the tail of the paper until the tail reaches a predetermined position at the upper end of the paper, and is determined by the rotational speed of the rollers 2. It will be done. Therefore, when a certain period of time has elapsed since the tail detector 4 detected the tail and the electric control device stops the operation of the first drive @ 7 and stops the rotation of the rollers 2, 2, the tail will be located at the upper end of the paper roll. Stops in place.

On the other hand, when the small-diameter paper roll R' rolls on the table 1'' and lands on the rollers 2, 2, the detection rod 3 rotates slightly as shown by the chain line in FIG. The rear detector 4 rotates slightly as shown by the chain line in FIG. 2 via the arms 12, 13, etc., and moves to B, which is farther from the detection position A. Then, as the paper on the table l'- is gradually wound up by the rotation of the roller 2゜2, and the tail passes through B, the tail detector 4 detects the passage of the tail in the same way as before, and the electric control device After a period of time has elapsed, the first drive source 7 is stopped and the rotation of the rollers 2, 2 is stopped. In this case, the length of the paper remaining on the table 1 differs between the large-diameter wrapping paper R and the small-diameter wrapping paper R' because the trailing detector 4 detects the trailing position of the paper at different positions.

However, since the outer circumference of the wrapping paper R' is shorter than that of the wrapping paper R, when the rollers 2, 2 rotate for a certain period of time after detecting the trailing edge of the paper, the trailing edge reaches a predetermined position lJf at the -L end of the wrapping paper R' and then stops. I will do it. In other words, if the rollers 2.2 are rotating at the same speed, the distance from the position A where the trailing end of the paper is detected to the -L end position A' of the wrapping paper H when this trailing tail is wound is The length is equal to the length of the paper roll R' from position B where the tail of the paper is detected to position B' at one end of the paper roll R' when this tail is wound.

The trailing detection positions A and B are calculated from the diameter of the wrapping paper, the time set in the timer means, and the rotational speed of the rollers 2, 2. Then, according to this calculation, the trailing detector 4 detects the wrapping paper R, R.
The length of the detection rod 3 and the diameter of the first. Set the length of the second arm 12.13.

When the trailing ends of the wrapping paper R, R' stop at the upper end as shown in ``--, the transport mechanism 15 provided below the rollers 2, 2 sends the wrapping paper to the pasting mechanism 16, and the trailing ends are pasted. .

The embodiment of the transfer mechanism 15 shown in FIG. One of the pressing tools 18, 18 is placed between the rollers 2, 2,
A second drive source 21 is connected to one side of the sprocket 19, 19 on which the transfer chain 17 is attached via a drive chain 20 or the like.

Therefore, when the second drive source 21 is activated after the rollers 2 and 2 have stopped and the trailing edge of the paper has stopped at the top end of the paper roll, the rollers 2 and 2 have stopped.
.
Send to 6.

The sticking mechanism 16 includes a wrapping paper detector 22 disposed at one end of the roller 2, and when the detector 22 detects wrapping paper, an electromagnetic valve 23 is actuated to send the adhesive in a tank 24 through a nozzle 25 into the wrapping paper. It has an adhesive supply @ 26 that ejects toward the end, and a pressure roller 28 at the tip of the arm rod 27 that is driven around the base end, and the roller 28 continuously applies the adhesive to the trailing edge. It consists of a presser 29 that presses down, and a guide plate 30 that guides the wrapping paper pushed out from the rollers 2, 2. The wrapping paper detector 22 is equipped with a light emitter and a light receiver like the trailing detector 4 described above, and detects the presence or absence of the wrapping paper based on the amount of light that hits the wrapping paper and is reflected. Therefore, when the wrapping paper moves due to the suppression by the suppressor 18 and the wrapping paper detector 22 detects the leading end of the wrapping paper that has come off the rollers 2, 2, the electromagnetic valve 23 opens and the nozzle 25 releases adhesive such as water or water glue. is ejected toward the upper end of the paper, that is, toward the tail. Then, since the pressing tool 18 continuously presses the wrapping paper, the portion to which the adhesive is applied advances, passes under the pressing roller 28, and is pressed by the roller 28. Therefore, the trailing end of the wrapping paper that has passed through the pressing roller 28 is pasted thinly by the thickness of the pressing roller 28 at a position slightly away from the end.

When the rear end surface of the wrapping paper pasted in this manner passes in front of the wrapping paper detector 22, the detector 22 detects the end of the passing of the wrapping paper and closes the solenoid valve 23 to stop the adhesive from spouting out. make it stop. Therefore, it is possible to prevent the adhesive from being wasted or being squirted onto the end face of the wrapping paper.

When the pressing tool 18 moves the wrapping paper until it comes off the guide plate 30 and sends it out to the next process, it is reversed at the sprocket 19 and comes into contact with the stop/stop switch 31, causing the second
The drive source 21 stops, and the endless chain 17 also stops running. By this time, the other pressing tool 18 has stopped at the end of the gap between the rollers 2, 2 and is waiting to press the next paper wrapper.

In the present invention, the interlocking means for transmitting the rotation of the detection rod 3 to the rear detector 4 is not limited to the one in which a plurality of arms are connected as in the above embodiment, but may be a gear train including an idler gear, for example. Alternatively, the rotation angle of the detection rod 3 may be detected electrically, and the rear detector 4 may be rotated by a step motor or the like.

Further, it is preferable that the first drive source 7 starts driving when the rolling paper rolls on the table l and is detected by the tail detector 4, and the second drive source 21 starts driving at the same time as the first drive source 7 stops. .

<Effects of the Invention> As described above, according to the present invention, the detection rod detects the diameter of the wrapping paper, and based on this detection, the rear detector can be rotated to direct it to an appropriate detection position. can. Therefore, if the roller is stopped after a predetermined period of time has elapsed since the trail detector detects the trail, the trail can be stopped at a predetermined position regardless of the diameter of the wrapping paper. Therefore, after winding and cutting a predetermined length of paper around a core material, it is possible to mechanically attach the paper from the outside, and moreover, the process can be performed at high speed. Therefore, it is possible to provide a high quality paper wrapper whose edges can be peeled off without tearing the second sheet when the edges are lifted during use.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, with FIG. 1 being a perspective view and FIG. 2 being a front view. ■ is a table, 2 is a roller, 3 is a detection rod, 4 is a rear detector, 8 is an endless chain, 9 is a spindle, 10 is a detection part, ti
12 and 13 are arms, 14 is a connecting rod, and 18 is a pressing tool.

Claims (1)

[Claims] A pair of rollers is provided along the edge of the table on which the paper roll rolls, and a trailing detector is provided above the rollers to detect the trailing edge of the paper. The trailing detector is rotatably provided above the table, and the trailing detector is connected to the detection rod via an interlocking means, and after a certain period of time has elapsed after the trailing detector detects the trailing edge of the paper, the rotation of the roller is stopped and the roller is rotated. A stop position regulating device for the trailing end of the wrapping paper, characterized in that the trailing end of the wrapping paper on the top stops at a fixed position.