JPS6253814A - Lateral stretching machine - Google Patents

Abstract

PURPOSE:To obtain a lateral stretching machine among noises of which generated through a roller chain the noise on the inlet side of a film has been controlled as low as possible, by making a driven wheel making the roller chain run in cooperation with a driving sprocket into a disc. CONSTITUTION:A pair of endless roller chains runs respectively on an advancing path 11 and return path 12 and a film is held by a clip provided within the advancing path. Then lateral stretching is applied to the film by the roller chains by widening a distance between the pair during running. Then the roller chain is guided by a driven wheel 13 at an inlet side, tension control is performed along with a change of direction and the same is driven by a driving sprocket 14 at an outlet side. Although the driving sprocket 14 has a cog, the driven wheel 13 is a disc not having the cog. As the driven wheel cooperating with the driving sprocket is made into the disc by eliminating the cog like this, a noise at the inlet side of the film wherein the driven wheel has been arranged is reduced drastically.

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to a horizontal stretching machine that reduces noise generation.

[Prior art]

Conventionally, a horizontal stretching machine has a roller chain equipped with clips on both sides of the film to grasp the film, and the roller chain is run across a driven sprocket on the film inlet side and a driving sprocket on the film exit side, and the roller chain is used to hold the film. Stretching in the lateral direction was performed by sequentially spreading the film in the width direction. However, when the roller chain is fully driven, noise is inevitably generated because the lateral stretching tension is applied as the roller chain tension.

In a horizontal stretching machine, it is possible to prevent noise from escaping outside with a soundproof wall that can be opened and closed on the film exit side, but the film exit side is not only used to attach the film sent from the previous process, but also to It is impossible to install a wall that can provide soundproofing effects because a control mechanism for stably gripping the handle at all times and a tension control mechanism for the roller chain are required. In recent years, film running speeds (Mid) have become higher and higher, and roller chain noise has become a big problem.

There are also types with less noise, such as silent chains, but they were not actually used due to the special nature of attaching a clip.

[Purpose of the invention]

The present invention has been made from this point of view, and its object is to provide a transverse stretching machine in which the noise generated from the roller chain is suppressed as much as possible on the film inlet side.

[Key points of the invention]

The transverse stretching machine of the present invention is characterized in that the driven wheel that runs the roller chain in cooperation with the 11 drive sprocket is a disc.

[Embodiments of the invention]

1 to 3 showing one embodiment of the present invention will be described below. In FIG. 1, the left side is the inlet side 1 of the film (not shown), and the right side is the exit side, and a pair of endless roller chains (not shown) each travel on an outgoing path 11 and an incoming path 12. During this time, the Eri film is held in the clip provided on this. Then, as shown in the figure, the film is stretched horizontally by widening the gap between the pair of roller chains in the middle of the run.

-Also, the roller chain is guided by a driven wheel 13 on the entrance side to change direction and tension control is applied, and on the exit side it is driven by a driving sedge rocket 14Vc. The drive sprocket 14 is of the usual type with teeth, but the driven wheel 13 is a disk without teeth, unlike the usual case. The driven wheel 13 and its vicinity will be explained below with reference to Fig. m2 and Fig. 3.

FIG. 2 is a sectional view of the driven wheel 13 in FIG. The middle part is supported by the cover 16 by a bearing 21, and the roller chain 22 is guided around the outer periphery. The outer periphery of this driven wheel 13 is surface hardened, and its diameter is increased to increase the contact area with the roller check/22, which is advantageous in terms of abrasion resistance and centrifugation during high-speed U-turns. It is also advantageous for reducing force. The guide bar 16 is fixed to the lower main rail 23.

Figure 3 shows details of the Z section in Figure 2, in which the roller chain 22 in contact with the outer periphery of the driven wheel 13 is connected to the driven wheel 13 by attaching ring plates 31 to both sides thereof. (see figure), and a clip body 33 is attached to the pin 32 that passes through the center. A pin 34 fixed at the left end of the clip body 33 rotatably supports a support 36 to which a clip 35 is attached, and a dog 37 is fixed above the support 36.

The clip 35 in the figure is shown gripping a film (not shown), and when the clip 35 is traveling on the return path 12 in FIG. 1 by the roller chain 22, the dog 37
is in contact with a cam O (not shown), so that it is clipped from the state shown in the figure; Clip 35 grips the film as 37 is pivoted by a cam to the position shown.

A roller 41 rotatably supported by a pin 40 fixed above the clip body 33 contacts the upper surface of a clip rail 42 fixed to the end of the cover 16, thereby supporting its weight.

- The rollers 45 and 46, which are rotatably supported by the bins 43 and 44 fixed to the approximate center and right end of the clip body 33, are in contact with both sides of the clip guide 42, and the rollers 45 and 46 fixed to the bottom of the clip body 33 are fixed. A roller 48 rotatably supported by a pin 47 is fixed to a frame 49 attached to the main rail 23 and comes into contact with the side surface of the clip guide 50, thereby regulating the horizontal movement of the clip body 33. However, during actual operation, the position of the driven sprocket 13 is adjusted to apply tension to the roller chain 22 to prevent lateral movement. be. [Effects of the Invention] As explained above in the horizontal stretching machine of the present invention, since the driven wheel that cooperates with the drive sprocket is made of a disc without toothing, the noise on the film inlet side where the driven wheel is arranged is greatly reduced. It has the effect of reducing

[Brief explanation of the drawing]

Each figure shows an embodiment of the present invention, and FIG. 1 is a plan view;
FIG. 2 is a sectional view of the driven wheel and its vicinity, and FIG. 3 is a detailed view of the Z portion of FIG. 2. 13... Driven wheel, 14... Drive sprocket, 33
...Clip body, 35...Clip, 41...
Roller, 42...Clip rail,

Claims (1)

[Claims] A horizontal stretching machine with a disc-shaped driven wheel that moves a roller chain in cooperation with a driving sprocket.