JPS5924497Y2 - Spiral paper tube manufacturing equipment - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an apparatus for manufacturing a paper tube formed by spirally winding a paper tape.

The general manufacturing method for spiral paper tubes is to place a mandrel in a fixed position, feed the paper tape around the outer circumference of the mandrel in an inclined manner at an appropriate angle, wrap it spirally, and then tape it between rotating drums placed on both sides of the mandrel. An endless winding belt is stretched, the middle part of this belt is wrapped around the outer circumference of the paper tape winding part, and as the belt runs, the paper tape winding part is tightened and rotated, and the paper tape is wound up in a spiral. It is something.

By the way, paper tube manufacturing equipment usually uses multiple endless belts to tighten and wind the paper tape at adjacent positions to improve the winding force of the paper tape, and to change the tension of the endless belts back and forth to ensure smooth winding. There must be.

For this reason, a tension mechanism is required that can apply a predetermined tension to the endless belt and adjust the tension.

In the conventional tension mechanism, one side of the base tube that holds the mandrel is arranged so that it can move forward and backward with respect to the mandrel, and the feed screw shaft is screwed into the slide box that supports this base tube, and the handle of the feed screw shaft is manually operated. The belt tension was adjusted by moving the base cylinder by operating the belt.

However, the method of manually adjusting belt tension using a handle not only has poor workability and operability, but also cannot automatically absorb the slack caused by stretching that occurs during belt use. There is a problem in that the tightening force becomes weak and it is impossible to manufacture a paper tube with excellent strength.

In addition, since the endless bell rotates between the base cylinders at high speed, workers may accidentally get their bodies caught in it, but there is inertia even if the manufacturing equipment is stopped, so There are risks that cannot be prevented.

This idea was made in consideration of the above points, and it is possible to always apply a constant tension to the endless belt, and it is easy to operate the tension adjustment, and it is possible to perform counting control in paper tube manufacturing. The purpose is to provide a paper tube manufacturing device that can improve safety.

The structure of this invention is that one of the base cylinders placed on both sides of the mandrel can move forward and backward with respect to the mandrel, and a hydraulic cylinder is linked to the feed screw shaft that manually feeds the mandrel, and the base cylinder is operated by hydraulic pressure. A constant tension is applied to the endless belt between the belts, and the belt can be loosened rapidly.

This invention will be explained below based on the embodiments shown in the accompanying drawings.

As shown in the figure, a mandrel 1 that defines the inner diameter of a paper tube A is horizontally arranged on the top of a table 2, and a paper tube manufacturing machine 3 is provided in the middle of this mandrel 1.

The main parts of the paper tube manufacturing machine 3 are a total of four base tubes 4.4 and 5. Two base tubes are placed on each side of the mandrel 1. 5
, base cylinders 4 and 5 corresponding to both sides, and endless tightening belts 6 and 6 stretched between the base cylinders 4 and 5, respectively.

Two base cylinders 4, 4 located at the top of the mandrel 1 in Fig. 1
is a fixed-position base cylinder, which is vertically mounted on a gear box 7 provided on the table 2 with rotating shafts 8, 8.

A solid shaft 9 of this box is attached to the top of the gear box 7.
Two supports 10 and 10, which can be horizontally rotated about Slide box 11.11 set up so that it can be moved freely
The base cylinders 5, 5 are vertically attached to the upper surface of the .

The arrangement angle of both supports 10 and 10 can be freely changed around the solid shaft 9, so that this support stand 10.10
The base cylinders 5 and 5 arranged above serve as a movable drum whose arrangement interval can be freely changed.

A large diameter spur gear 12 is provided on the solid shaft 9 of the gear box 7, and a small diameter gear 1 is provided on the rotating shafts 8, 8 of the fixed position base cylinders 4 and 4.
3 meshes with this gear 12.

Also, on both support stands 10.10, a horizontal shaft 14.14 passing through the slide box 11°11 in the direction of movement, and a solid shaft 9.
A vertical axis 15.15 is provided at a closer position, and the vertical axis 15.1
5 and the horizontal axis 14.14 are interlocked with a pair of bevel gears 16.16, and the vertical axis 15.15 is a small diameter gear 17.17 and a large diameter gear 12.
In conjunction with, horizontal axis 14.14 and slide box 11.1
The base cylinders 5, 5 on the box 1 are interlocked with each other through a suitable rotation transmission means such as a bevel gear in a manner that allows movement of the box.

With such an interlocking mechanism, the solid shaft 9 of the gear box 7
When driven by a motor, each base cylinder 4 degrees 4, 5. 5
The base cylinder 5.5 on the movable side rotates in any position.

Feed screw shafts 18.18 passing through the slide boxes 11, 11 along the movement direction are arranged on both support stands 10.10, and screws 19.19 fixed to the boxes are screwed into each screw shaft, and each The screw shaft 18.18 is a coupled extension shaft 20.
Hydraulic cylinder 21゜21 fixed to support stand 10.10
A cylinder 21 with an extension shaft 20.20 passes through the interior in the axial direction.
, 21 with a manually operated handle 22, 2 at the end projecting from the .
2 is attached so that the base cylinders 5, 5 can be moved by either the cylinder 21.21 or the handle 22.22.

Both support stands 10.10 are interlocked via an angle adjustment mechanism 23 attached to the table 2, and the base cylinder 5 is adjusted by operating a handle 24.
The interval between and 5 can be adjusted.

As shown in FIG. 2, the two endless belts 6 and 6 form winding portions X and Y in which the paper tape B is wound around the outer periphery of the mandrel 1 by exactly -rotation in the middle thereof. By the running of the endless belt 6.6 due to the rotation of each base cylinder, the paper tape B is rotated at the winding portions X and Y, moved in the axial direction, and wound up spirally.

The winding portion X of the endless belt 6 located on the supply side of the paper tape B enters the mandrel 1 from the top and exits from the top, and approximately matches the inclination angle of the paper tape B, forcing the paper tape B to rotate. It is something to give.

The winding portion Y of the other endless belt 6 enters the mandrel 1 from the lower part and exits from the lower part, has an inclination angle opposite to that of the paper tape B, and winds the paper tube A.

A hydraulic cylinder 21 that provides forward and backward movement to the base cylinders 5, 5.
21, as shown in FIG. 3, a cylinder body 25 is fixed to the end of the support base 10, a piston 26 that slides inside the cylinder body 25 is formed in a cylindrical shape, and a piston 26 is provided protruding from the end side of the piston 26. The cylinder 27 is the end plate 28, 29 of the main body 25.
The extension shaft 20 of the feed screw shaft 18 passes through the cylinder 27 in an oil-tight manner, and the cylinder 27 and the extension shaft 20 are rotatable via a bearing 30 and move integrally in the axial direction. are combined like this.

By supplying and discharging hydraulic pressure to and from the hydraulic cylinder 21, the base cylinder 5 can be moved to tension and rapidly loosen the endless belt 6. Moreover, by manual operation using the handle 22, fine adjustments that are difficult to make using hydraulic pressure alone are possible. Furthermore, by continuing to supply constant pressure oil into the hydraulic cylinder 21, a constant tension can be applied at all times even if the endless belt 6 stretches.

The paper tube manufacturing machine of this invention has the above-mentioned configuration, and a plurality of paper tapes B are fed from the paper supply section onto the mandrel 1 at a predetermined angle so as to wrap each sheet, and the paper tube manufacturing machine 3 This is wound spirally on mandrel 1.

The paper tube manufacturing machine 3 supplies hydraulic pressure at a predetermined pressure to the hydraulic cylinder 21 to keep the tension of the endless belt 6.6 constant.
A homogeneous paper tube A is formed on a mandrel 1.

When the supply of hydraulic pressure to the hydraulic cylinder 21 is switched, the endless belt 6.6 is rapidly loosened, and accidents such as entanglement can be prevented.

As described above, this invention has the above-described configuration, and therefore has the following effects.

(1) Since tension is applied to the belt by pulling one side of the base cylinder on which the endless belt is stretched using a hydraulic cylinder, a constant tension can be applied to the endless belt even if it stretches during use. Since a constant tension can be maintained automatically, it becomes possible to manufacture a paper tube with excellent strength and uniformity.

(2) Since a constant tension is applied to the endless belt by a hydraulic cylinder, the seaming force can be counted and managed using hydraulic pressure, and the application of tension can be digitally displayed, so a homogeneous paper tube can be manufactured.

(3) Since tension is applied to the endless belt using a hydraulic cylinder, the belt can be loosened rapidly by switching the supply and discharge of hydraulic pressure, which prevents workers from getting caught in the belt and greatly improves safety. I can do it.

(4) By controlling the hydraulic pressure to the hydraulic cylinder, the tension of the front and rear endless belts can be freely changed, and the workability and operability for adjusting the tension can be greatly simplified.

(5) Since a handle is provided at the end of the feed screw shaft passing through the hydraulic cylinder, the belt tension can be adjusted manually, allowing fine adjustments that are difficult to make using hydraulic pressure alone.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the paper tube manufacturing apparatus according to this invention, FIG. 2 is a plan view of the same with a belt stretched over it, and FIG. 3 is a vertical sectional side view of the main parts of the same. 1 is a mandrel, 3 is a paper tube manufacturing machine, 4 and 5 are base cylinders, 6 is a tightening belt, 18 is a feed screw shaft, 19 is a nut, 21 is a hydraulic cylinder, 22 is a handle, and 26 is a piston.

Claims (1)

[Scope of utility model registration request] A base cylinder that is forcibly driven is placed on both sides of the mandrel,
In a spiral paper tube manufacturing device in which an endless belt stretched across base tubes on both sides is wound halfway around a paper tube around the outer periphery of a mandrel, one base tube is supported by a support stand so that it can move forward and backward with respect to the mandrel. A handle for rotation operation is provided at the end of a feed screw shaft screwed with the slide box, and a hydraulic cylinder is externally fitted coaxially in the middle of the feed screw shaft,
This hydraulic cylinder is fitted with a cylinder body whose one end is fixed to a support base so as to be able to slide freely inside the cylinder body,
A spiral paper tube that is formed by a cylindrical piston with both ends passing through the end plate of the cylinder body in the axial direction, and this piston is fitted onto the feed screw shaft and is coupled to the screw shaft so that it moves integrally with the screw shaft in the axial direction. Manufacturing equipment.