JPH01213497A - Driving mechanism of multi-cylinder type dryer in papermaking - Google Patents

Abstract

PURPOSE:To reduce production cost compared to conventional transmission of driving force by gear type and prevent generation of any slippage such as in case of canvas-driving type, by driving of rotation of each dryer cylinder with motor individually in a dryer of multi-cylinder type. CONSTITUTION:In a dryer of multi-cylinder type, each dryer cylinder 11 is attached a rotation axis 17 parallel to the axis of the cylinder 11 and the axis 17 is driven by a motor 16 while the rotating force with the motor 16 is transferred to the axis 15a of the dryer cylinder 11 through a belt 21.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention aims at improving the drive of a multi-barrel dryer forming a drying part in paper manufacturing.

BACKGROUND ART As shown in FIG. 1, the dryer cylinders 1 and canvas 2 of each stage in a multi-tube dryer are generally driven by providing an output gear 4 on the shaft 3 of each dryer cylinder 1 arranged in parallel. A plurality of intermediate gears 5 are interposed between each output gear 4 to connect a group of dryer cylinders by gear, and one of the groups of intermediate gears 5 is used as a manual gear, that is, a drive shaft 6, and the drive shaft 6 is driven by a motor to sequentially rotate the output gear 4 of the dryer cylinder 1 in the next stage through each group of intermediate gears 5, and the dryer cylinder group is arranged between the dryer cylinders in each stage. A structure is adopted in which the groups work together.

In addition, in recent years, some methods have been adopted in which the canvas rolls arranged between the dryer cylinders are individually driven, the dryer cylinders are not provided with the gears, and the canvas is pulled by the rotation of the canvas rolls to drive the dryer cylinders. .

Problems to be Solved by the Invention However, the former gear-locking system requires a large number of gears, is very expensive to manufacture, and requires precision, and has the disadvantage that the gear drive generates a lot of noise.
In addition, a large number of gear pockets 1 are tightly installed on one side of the dryer cylinder group (called the drive side), forming a wall that significantly impedes ventilation, and on the other side of the dryer cylinder group (called the operation side). This has the problem of deteriorating drying efficiency and causing drying spots on the drive side.

The latter canvas drive method was proposed as a solution to the drawbacks of the gear-driven method, but if the dryer cylinder is rotated by pulling the canvas with a small-diameter canvas roll, the dryer cylinder and canvas Since the wet paper, which is brittle and has a lot of moisture, is interposed between the two, the tensile force of the canvas acts directly on the wet paper, which may cause wrinkles or damage to the wet paper.

- Also, since the canvas is pulled by the frictional force of the small-diameter canvas roll and the dryer cylinder, which has a large diameter and has a large frictional force, is rotated, slips are likely to occur and the drive becomes unstable.

The present invention is provided to solve the problems in each of the above-mentioned prior examples.

Means for Solving the Problems The present invention provides, as a means for solving the above problems, a drive shaft driven by a motor in parallel to the dryer cylinder axis in the multi-tube dryer for paper manufacturing. A transmission belt is placed between the shaft and the dryer cylinder shaft, and each drive shaft is driven by the belt to drive each dryer cylinder, thereby driving the dryer canvas.

Function: As described above, the present invention provides a drive shaft parallel to the dryer cylinder axis and obtains the drive of the dryer cylinder by belt transmission.Therefore, not only does it eliminate the need for a large number of gears as in the gear-driven system. , an extremely simple frame structure that eliminates the noise caused by gear drive, eliminates the need for a gear box that is tightly installed on the drive side as in the past, and has the minimum necessary frame on the drive side and a bracket for installing the motor. Therefore, the air permeability on the driving side and the operating side of the dryer cylinder group can be significantly improved, and the dry spots can be effectively eliminated.

Furthermore, since the drive side of the dryer cylinder group is in a substantially open state, there is an advantage that the waste paper at the time of paper breakage can be easily taken out to the drive side.

In addition, when the canvas is moved by rotating each dryer cylinder using the belt transmission as in the present invention, the diameter of the dryer cylinder is large and the contact area with the canvas is ensured sufficiently. Driving becomes stable without causing slippage. Therefore, problems such as damage to wet paper can also be solved.

EXAMPLES Hereinafter, examples of the present invention will be explained based on FIGS. 2 to 6.

Figure 2 shows the multi-tube dryer that forms the dry part and the drive system for each dryer cylinder, with the motor and frame partially omitted, and Figures 3 and 4 enlarge the drive unit in each dryer cylinder. FIG. 5 is a diagram showing the installed state of the drive section.

As shown in FIG. 2, the multi-tube dryer has a large number of dryer cylinders 11 arranged in a single row or in parallel on the return side, and a canvas 12 is passed through the group of dryer cylinders in each row via a canvas roll 13. The dryer canvas 1
A wet paper 14 is passed between the dryer cylinders 11 of each stage and the wet paper 14 is pressed against the circumferential surface of the dryer cylinder L1 by the canvas 12 to dry the paper.

In the multi-tube dryer of the present invention, as shown in FIGS. 2 to 4, each of the dryer cylinders 11 is provided with a drive shaft 17 driven by a motor 16 parallel to the cylinder axis 15. A drive shaft 17 is provided which is directly connected to the dryer cylinder shaft 15 through a coupling 18, and a pulley 1 is connected to the drive shaft 17 and the dryer cylinder shaft 15.
9 and 20 are provided respectively, a transmission belt 21 is applied to both pulleys 19 and 20, and belt transmission is performed by driving each drive shaft 17 to drive each dryer cylinder 11 and drive the dryer canvas 12. This is what I did.

On one side of the group of dryer cylinders 11, that is, on the drive side, a rectangular frame 22 made of a combination of columns and beams as shown in FIG. towards bracket 23
The motor 16 is installed on the bracket 23, and the dryer cylinder shaft 15 of the dryer cylinder 11 is supported by a bearing 24 on the four-tank frame 22a, and the drive shaft 17 is supported by a bearing 25 on the four-tank frame 22a. Both shafts 15, 17 are supported in parallel, and the pulleys 19, 20 are provided at the end of the drive shaft 17 and at the base of the dryer cylinder shaft 15, and a belt 21 is hung between the pulleys 19, 20. Similarly, the driving motor 16 for each dryer cylinder 11 in the lower row is installed on the sole plate 26, and each dryer cylinder 11 is thus driven by a belt transmission method driven by the respective motor.

In FIGS. 3 and 5, 27 is a hood that covers all the dryer cylinders 11, and a driving section including the motor 16 is installed inside the hood 27. As shown by the broken line in FIG. 3, only the motor 16 can be installed outside the hood.

The dryer cylinder shaft 15 is formed by forming the above-mentioned driving part.
The shaft end is left open so that the above-mentioned supply can be carried out without any trouble. As shown in FIG. 6, the transmission belt 21 is a timing belt having rectangular teeth on one side, preferably a steel belt. Correspondingly, the pulleys 19 and 20 are toothed pulleys.

As described above, each of the drive shafts 17 arranged parallel to the dryer cylinder shaft 15 is driven by the motor 16, and the drive of the drive shaft 17 rotates each of the dryer cylinder shafts 15 through belt transmission, and the cylinder 11 is rotated by the drive shaft 17.
The above drive mechanism of the present invention, which drives the canvas 12 hung on the dryer cylinder 11, can also be implemented as a drive mechanism for a cooling cylinder provided after the group of dryer cylinders 11, that is, a cooling cylinder for the purpose of cooling paper. It is.

As described in detail, according to the present invention, a drive shaft is provided which is driven in parallel with the dryer cylinder axis, a transmission belt is placed between both shafts, and each dryer cylinder is driven by the belt transmission. This not only eliminates the need for equipment with a large number of gears as in the gear-driven system, but also eliminates the problem of noise caused by gear drive, and also eliminates the need for a gearbox that is secretly installed on the drive side as in the past. This makes it possible to create an extremely simple frame structure in which the minimum necessary frame is provided on the drive side and a bracket for installing the motor is provided on the frame, and therefore the ventilation on the drive side of the dryer cylinder group is significantly improved, and the drive side It is possible to effectively eliminate dry spots on the operating side.

Furthermore, since the drive side of the dryer cylinder group can be kept sufficiently open, it is now possible to remove waste paper from the drive side, which was difficult to do in the past, for example, when a paper break occurs. Maintenance and inspection work can be carried out conveniently.

Furthermore, when the canvas is moved by rotating each dryer cylinder using the belt transmission as in the present invention, the diameter of the dryer cylinder is large and the contact area with the canvas is ensured sufficiently. Problems such as occurrence of slippage and damage to the wet paper can also be solved.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a drive system in a conventional multi-tube dryer, and FIGS. 2 to 6 show embodiments of the present invention.
Figure 2 is a side view showing the multi-tube dryer forming the dry part and the drive system for each dryer cylinder, with parts of the motor and frame omitted, and Figure 3 is an enlarged view of the drive unit in each dryer cylinder. FIG. 4 is a plan view, FIG. 4 is a cross-sectional side view of the motor drive shaft, FIG. 5 is a front view showing the installed state of the drive section, and FIG. 6 is an enlarged sectional view of the transmission belt. DESCRIPTION OF SYMBOLS 11... Dryer cylinder, 12... Dryer canvas, 14... Wet paper, 15... Dryer cylinder shaft, 16... Motor, 17... Drive shaft, 1
9゜20...Pulley, 21...Conduction belt, 22
...Frame, 23...Bracket, 24.25.
...Bearing, 26...Sole plate. 4'A Figure 5 Figure 6

Claims (1)

[Claims] The above-mentioned dryer cylinder is used in a multi-tube dryer for paper manufacturing in which a dryer canvas is passed through a dryer cylinder at each stage, and wet paper is passed between the mating surfaces of the dryer canvas and each stage's dryer cylinder for drying. A drive mechanism for a multi-tube dryer in paper manufacturing, which includes a drive shaft driven by a motor in parallel with the shaft, and a transmission belt is connected between the drive shaft and the dryer cylinder shaft to drive the dryer cylinder and the dryer canvas.