JPS6029343B2 - paper tube making machine - Google Patents

Description

[Detailed description of the invention] The present invention relates to a paper tube manufacturing machine.

As shown in FIG. 5, the paper wrapping device 5 of the secondary paper tube manufacturing machine
is a pair of rotating rollers 50 provided on both sides of the mandrel 2.
, Belt 21 wrapped around mandrel 2 halfway during 50
The paper tape 9 is wound spirally around the mandrel 2 by the winding force of the belt 21 around the mandrel 2.

To make a thick paper tube, 2 symmetrically to the mandrel 2
The base seaming devices 5, 5a are installed, and the downstream seaming device 5a is installed.
The band tape 91 is also supplied and wound in multiple layers. However, as is well known, the mandrel 2 is supported by a support block (not shown) at only the upstream end, so the 2
The shorter the interval 13 between the winding positions 12, 12 of the belts 21, 21 of the base cotton wrapping devices 5, 5a, respectively, the less the swing of the mandrel, and the more stable the paper tape can be wound.

Therefore, as shown in FIG. 4, three rotating rollers 50, 50a, 50b are arranged in a V-shape with a mandrel 2 in between, and two belts 21 are hung around the rollers 50, 50a at both ends of the V-shape.
, 22 are respectively wound around a mandrel 2 and passed through a common roller 50b having a V-shaped base end, thereby narrowing the interval 13 between the tightening positions 12, 12 of the belts 21, 22. ing. In the above case, the three rollers 50, 50a, 50b rotate at the same speed, and therefore the two belts 21, 22 run at the same speed.

However, in correspondence with the thickness of the paper tape 91 newly inserted into the belt 22 on the downstream side, the thickness of the paper tube is different between the upstream side and the downstream side of the belt portion, and the thickness of the paper tube is different. Belts 21 and 22 running at the same speed at two locations
When the paper tape is tightened with Paper tubes with excellent pressure resistance could not be produced.

In the present invention, by devising the loaf on which the two belts commonly hang, the two belts can be run at different speeds, and the paper tape can be wrapped tightly without any gaps, resulting in excellent pressure resistance. The purpose of the machine is to provide a paper tube manufacturing machine capable of forming paper tubes of different sizes, and its configuration is such that a first roller 51 and a second roller 52 are provided on one side of a mandrel 2 with an interval in the longitudinal direction of the mandrel 2. On the other side of the mandrel 2, a third roller 53 and a fourth roller 54 are provided vertically on the vertical shaft 3, and the four rollers 51 to 54 are arranged in a V-shape. The third roller 53 is fixed to the vertical shaft 3, the fourth roller 54 is rotatably attached to the vertical shaft 3 independently of the rotation of the vertical shaft 3, and the vertical shaft 3 is connected to the driving device 6.

The fourth roller 54 is connected to the drive device 6 via the transmission device 8 . The first belt 21, which is wound around the mandrel 2 halfway, is stretched between one of the third and fourth rollers 53 and 54 and the first roller 51, and the remaining third and fourth rollers are A second belt 22, which is wound around the mandrel 2 halfway, is stretched between the roller and the second roller 52.

For example, the first roller 51 and the fourth roller 54 are connected by the first belt 21, and the second roller 52 and the third roller 53 are connected by the second belt 21.
The belts 22 are used to hold each other.

Further, when forming the paper tube 90 by attaching the paper tapes 9, 91 to the first belt 21 and the second belt 22, respectively, and winding the paper tapes 9, 91 in a spiral shape on the mandrel 2,
The running speed of the second belt 22 is set farther than the running speed of the first belt 21 on the upstream side by the amount that the paper tube becomes thicker in accordance with the thickness of the paper tape 91 supplied to the second belt 22 on the downstream side.

In other words, the running speed of the first belt 21 is made slower than the running speed of the second belt 22. As a result, a gap 92 is created between the adjacent edges of the paper tape 91 due to the bending of the paper tube caused by tightening the paper tube at two locations with different thicknesses with the belts 21 and 22 running at the same speed, as in the past. The resulting problem is solved, and each belt 21, 22 allows the two paper tapes to be wound smoothly and tightly to form a pressure-resistant ridged paper tube without slipping on the mandrel. Incidentally, the third roller 53 and the first roller 51, and the second roller 52 and the fourth roller 54 may each be stretched by belts, and the important point is that the speed of the upstream belt is adjusted to correspond to the thickness of the paper tape. The point is to make the speed faster than the belt speed on the downstream side.

The present invention will be specifically described below based on embodiments shown in the drawings.

The paper tube manufacturing machine supports the mandrel 2 in parallel to the base 1 by ironing the upstream end of the mandrel 2 to a support flock 11 disposed at the upstream end of the base 1.

One vertical shaft 3 on one side of the mandrel 2, 2 on the other side
The vertical axes 31 and 32 of the book are arranged.

Each of the vertical shafts 3, 31, and 32 passes freely through the support 4 at both ends and the base end of a V-shaped support 4 provided on the base 1. A vertically long first roller 51 and a second roller 52 are fixed to the upper portions of the vertical shafts 31 and 32, respectively, and the vertically long roller 5 is fixed to the vertical shaft 3 at the base end of the support body 4.
1,52 approximately 1'2 third roller 53 and fourth roller 5
4 are placed concentrically above and below. The upper third roller 53 is keyed to the vertical shaft 3, and the lower fourth roller 54 is freely rotatable on the vertical shaft 3 regardless of the rotation of the vertical shaft 3.

The four rollers 51 to 54 have the same outer diameter.

A drive shaft 62 driven by a motor 61 is provided on the side of the base 1, a gear transmission device 63 is provided inside the base 1, and the device 63 and the drive shaft 62 are connected by a chain 64 to transmit the It constitutes a roller drive device 6. Gear transmission device 6
3 is a bevel gear 6 driven by the chain 64;
The rotating main shaft 6 is equipped with a bevel gear 66 at its upper end that engages with the rotating main shaft 6.
The large gear 7 is fixed to the large gear 7, and the two driven small gears 71, 71 are engaged with the large gear 7.
Freely rotate and pivot.

The ball 72 of the one small gear 71 and the vertical shaft 32 of the second roller 52 are connected to universal joints 73, 73 at both ends.
The shaft 72 of the other pinion 71 and the vertical shaft 3 of the third roller 53 are connected by a rotation transmission shaft 74 having universal joints 73 at both ends.
Connect with.

As a result, the second roller 52 and the third loaf 53 are forcibly driven at the same speed. The 40th roller below the third roller 53
The roller 54 is provided with a cylinder 55 projecting downward so as to freely surround the machine shaft 3, and the cylinder 55 and the vertical shaft 3 are linked via the transmission 8.

The transmission 8 is a planetary gear mechanism, in which a sun gear 81 is integrally formed at the lower end of the cylinder 55, a planet gear 82 is provided on the outer periphery of the sun gear 81, and an internal gear 83 is provided on the outside of the planet gear 82. to mesh.

A planetary shaft 84 of each planetary gear 82 is supported by a support plate 85 fixed to the vertical shaft 3, and the planetary gear 82 revolves around the sun gear 81 at the same rotational speed as the vertical shaft 3. The outer periphery of the internal gear 83 is formed with a worm gear surface 86, and a worm 87 is engaged with the worm gear surface 86. The worm 87 is connected to the drive shaft 62 with chains 88, 88 and a bran gear transmission 8.
Rotationally driven via 9. In the transmission 8, the planetary shaft 84 receives input from the vertical shaft 3, and the internal gear 83 receives input from the worm 87.
Therefore, the speed difference between the vertical shaft 3 and the sun gear 81, that is, the third
This appears in the difference in circumferential speed between the roller 53 and the fourth roller 54.

The tube 55 of the fourth roller 54 and the vertical shaft 31 of the first roller 51
Chain sprockets 75, 75 are provided protrudingly from each other, and a chain 76 is stretched between both chain sprockets.

Therefore, when the fourth roller 54 rotates, the first loaf 51 is also forced to rotate at the same speed as the fourth roller 54.

Between the first roller 51 and the fourth roller 54, and between the second loaf 52 and the third roller 53, two belts, the first and second belts 21 and 22, which are respectively wound around the mandrel 2 in the middle, are stretched. .

However, when forming the paper tube 90 by attaching the paper tapes 9, 91 to the first belt 21 and the second belt 22 and winding the paper tapes 9, 91 spirally around the mandrel 2, the downstream side 2 Paper tape 91 supplied to belt 22
The second belt 2
2 is made faster than the running speed of the first belt 21 on the upstream side.

In other words, the running speed of the first belt 21 is made slower than the running speed of the second belt 22. As mentioned above, the third
Roller 53, fourth roller 54 Therefore, since this is reflected in the running speed difference between the first belt 21 and the second belt 22, if the internal gear 83 is rotated a little faster than the rotational speed of the vertical shaft 3, the upstream belt The running speed of belt 21 is set to be slower than the running speed of the belt on the downstream side. The rotational speed of the internal gear 83 can be freely adjusted by a continuously variable transmission 89 connected to the worm 87. Note that the method of wrapping the belts 21 and 22 around the mandrel 2 is not limited to the method shown in the drawings, but it is possible to wrap the belts around the mandrel so that the belts rotate in the direction in which the paper tape is wound. Furthermore, the first at both ends of the V shape,
It is also possible to configure the drive device 6 so that the rotation of the third and fourth rollers 53 and 54 at the base end of the V-shape is opposite to the direction of rotation of the second rollers 51 and 52. It is possible to wrap the belts 21 and 22 around the mandrel 2 taking into account the rotational direction of the rollers.

As described above, in the present invention, the two belts 21 and 22 stretched across the four rollers 51 to 54 on both sides of the mandrel 2 in a V-shape via the mandrel 2 do not run at the same speed. , the paper tape 91 is joined to the belt 22 on the downstream side, and the paper tube becomes thicker, so that the belt 22 on the downstream side increases in thickness.
The running speed of the belt 21 can be set farther than the running speed of the belt 21 on the upstream side.In other words, both belts 21 and 22 can be run at a speed matching the circumferential speed of the paper tube that is in the process of being formed. As shown in the figure, one of the belts does not correspond to the circumferential speed of the paper tube, and the paper tube 90 is replaced, or the slip between the belt and the paper tube is suppressed, and as a result, the paper tape can be wrapped tightly and the pressure resistance can be improved. A paper tube can be formed.

[Brief explanation of drawings]

Figure 1 is a plan view, Figure 2 is a sectional view taken along the Rolo line in Figure 1, Figure 3 is an enlarged view of the main parts of the transmission, Figures 4 and 5 are explanatory diagrams of the conventional example, and Figure 6. is a front view of a conventional paper tube. 2... Mandrel, 3... Vertical axis, 51
...First roller, 52...Second roller, 53...
...Third roller, 54...Fourth roller, 6...
- Drive device, 8...Transmission device. Figure 3 Figure 4 Figure 5 Figure 6 Figure 1 Figure 2

Claims (1)

[Claims] 1. On one side of the mandrel 2, a first roller 51 and a second roller 52 are provided side by side with an interval in the longitudinal direction of the mandrel 2, and on the other side of the mandrel 2, a roller is provided on one vertical shaft 3. Then, two endless belts are wound around the mandrel 2, and each of the endless belts is wrapped around the first belt on one side of the mandrel 2.
The paper tape is passed between the roller 51 and the second roller 52 and the roller on the vertical axis on the other side of the mandrel, and the paper tape supplied onto the mandrel 2 is wound around the mandrel in a spiral shape by the rotation of the belt and pushed out to the downstream side. In an apparatus for manufacturing paper tubes, a roller on the vertical shaft 3 is connected to a third roller fixed to the vertical shaft 3.
It is composed of a roller 53 and a fourth roller 54 that is fitted onto the vertical shaft 3 so as to rotate freely regardless of the rotation of the vertical shaft 3.
One of the upper rollers is driven in conjunction with a drive device 6,
The other roller on the vertical shaft 3 is connected to the drive device 6 via a transmission 8, and the third and fourth rollers 53, 5 on the vertical shaft 3
The first belt 21 wound around the mandrel 2 is stretched between one of the rollers 4 and the first roller 51, and the remaining rollers of the third and fourth rollers and the second roller 52 are connected to each other. In between, there is a second belt 2 wrapped around the mandrel 2 on the way.
Paper tube manufacturing machine with 2.