JPS6328149B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an expander roll.

During processes such as scouring, bleaching, washing, dyeing, coating, and printing of fiber cloth, or during the processes such as paper, cellophane paper, etc.
Spreading cloth in film processing machines, correcting slack in paper and film, adjusting incorrect tension,
Expander rolls are used during the traveling process to prevent the ears from sagging. However, the curvature of the expander roll must be varied depending on the type of substrate and the amount of width.

The present invention makes it possible to easily adjust the curvature and also to simplify the configuration. The present invention will be explained below based on illustrated embodiments.

In the figure, reference numeral 1 denotes the main body of an expander roll made of an elastic material and formed into a cylindrical shape having a required diameter and length. The main body 1 is rotatably and variably supported via a large number of bearings 3 provided at a constant pitch on the outer periphery and a large number of short tubular inner cylinders 4.

This shaft 2 connects both ends of a plurality of parallel shaft rods 6 to rod supports 7, as detailed in FIGS. 2 and 3.
and 8 and 9 are integrally formed.
That is, a plurality, for example, six shaft rods 6 are arranged at regular intervals on one end surface of the rod support 7, and rod fitting holes 7a are bored at regular intervals for fitting and fixing them. The cylinder is divided into two along the longitudinal axis to form a semicircular cylinder, and rod fitting holes 8a and 9a are respectively drilled in the end face of the cylinder at the same pitch as the rod fitting holes drilled in the rod support 7. When both rod supports 8 and 9 are stacked together, they form a single cylindrical body. Then, an outer cylinder 10 is fitted to the outer periphery of the other end of one of the rod supports 8 and 9, and the other ends of both rod supports 8 and 9 located inside the outer cylinder 10 are positioned at different positions. , and the screw portions 8b and 9b have a large diameter. This threaded part 8
Female threads 8c and 9c are carved in b and 9b, and if one of these female threads 8c and 9c is a right-handed thread, the other is a left-handed thread. In the illustrated embodiment, 8c is a left-handed thread;
9c is a right-handed thread.

A notch 9d for fitting the threaded part 8b of the rod support 8 is formed in the middle part of the rod support 9 at a position where the threaded part 8b of the rod support 8 faces, and both rod supports 8 and 9 are overlapped. Even in this case, the female threads 8c and 9c of the threaded portions of both supports are positioned on the same axis, and the length of this notch 9d is greater than the length of the threaded portion 8b.

A threaded rod 11 is screwed into the internal threads 8c, 9c of both rod supports located on the same axis. screw rod 1
1 has a left-handed threaded part 11a and a right-handed threaded part 11b, and the left-handed threaded part 11a is connected to the female thread 8c of the threaded part 8b.
The right-hand threaded portions 11b are respectively screwed into the female threads 9c of the threaded portion 9b, and the tips of the threaded rods 11 are selectively rotated to the left or right via a hand handle or an electric motor. .

A sleeve 12 for supporting a bearing is inserted into a plurality of shaft rods 6 installed between the rod supports 7 and 8, 9 at a position where the bearing 3 is supported. This sleeve 12 is disc-shaped with the same diameter as the rod support 7, and holes 12a passing through the shaft rod are bored at a fixed pitch.The inner part of the bearing is fixed to the outer periphery of this sleeve 12. A plurality of rods are inserted at fixed pitches or arbitrary pitches in the longitudinal direction of the rod.

Note that both ends of this shaft 2 are equipped with self-aligning bearings 5, 5.
It is supported by

Therefore, when the expander roll configured as described above is curved according to the material to be tented and the amount of tentering, when the threaded rod 11 is turned to the right, the right-hand thread 11a of this threaded rod is The threaded rod support 8 is pushed out by an amount determined by the number of rotations of the threaded rod and the thread pitch, that is, it is pushed to the right in FIG.
At this time, the shaft rod 6 that is fitted and supported by the rod support 8 is in a compressed state because one end thereof is fixed by the rod support 7, and the threaded portion of the other rod support 9 is compressed. Since 9b has a left-handed thread, the rod support 9 is moved (pulled) in the opposite direction to the direction in which 8 moves in the projecting direction, that is, pulled toward the left in FIG. As a result, the shaft rod 6 fitted and supported by the rod support 9 is pulled. In this way, the upper half of the numerous shaft rods are compressed and the lower half are tensioned, so that the shaft 2 as a whole is bent.

The amount of curvature changes depending on the number of rotations of the threaded rod 11, and when the rotation of the threaded rod is stopped at the position where the desired curvature is obtained, the shaft 2, that is, the elastic material fitted on the outer periphery of this shaft 2 The expander roll is held in a curved state and rotates freely by bearings, thereby achieving the desired width.

According to the present invention, a shaft that penetrates an expander roll made of an elastic material and is rotatably supported is arranged in parallel with a plurality of shaft rods at a constant pitch, and both ends of the shaft rods are supported by rod supports. In addition, one rod support is divided into two in the longitudinal direction,
Since this is screwed into a threaded rod with different threads, different forces are applied to the upper and lower halves of the shaft rod due to the rotation of the screw rod. A force is applied simultaneously in the compression direction on the shaft rod, and a force is applied in the tensile direction on the shaft rod in the lower half, allowing for smooth roll curvature. It has advantages such as being able to easily produce expander rolls with different lengths by simply changing the length, being suitable for mass production, and being able to be provided at low cost.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view, Fig. 2 is a sectional view of the shaft, Fig. 3 is an external view of the rod support, Fig. 4 is a sectional view taken in the direction of Fig. 2, and Fig. 5 is a sectional view of the sleeve. It is an external view. 1...Main body of the expander roll, 2...
Shaft, 3...Bearing, 4...Inner cylinder, 5...Bearing, 6...Shaft rod, 7, 8, 9...Rod support, 7a, 8a, 9a...Rod fitting hole, 8b,
9b...Threaded portion, 8c, 9c...Female thread, 9d...
... Notch, 10 ... Outer cylinder, 11 ... Threaded rod, 12
...Sleeve, 12a...hole.

Claims (1)

[Claims] 1 A plurality of shaft rods are arranged in parallel at regular intervals in a cage shape, both ends of which are supported by rod supports, and fixed to the outer periphery of the shaft rods via sleeves fitted to the shaft rods. The expander roll is rotatably supported via a bearing and an inner cylinder, and the rod support at one end of this shaft rod is split into two in the longitudinal direction, and each end of the two halves is attached in a different direction. A threaded part with a female thread of It is characterized by a rod support that is split into pieces, which can be bent by applying forces in opposite directions to each other, applying a compressive action to half of the shaft rods and a tensile action to the other half of the shaft rods. Expander roll.