JPH0212171B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, a pair of endless left and right clip chains equipped with tenter clips are disposed along both sides of the rail, and the left and right tenter clips, which are moved by the clip chains, can hold the film. The present invention relates to a device for adjusting the tension of the clip chain in a tenter that grips both side edges and moves the film, and stretches the film to a predetermined magnification during the movement.

As shown in FIG. 1, the conventional tenter has a pair of endless left and right clip chains 9, 9 equipped with tenter clips, which are arranged along both sides of the rail as shown in the figure, and the clip chains 9, 9 are installed at the tenter entrance side. The tenter clips attached to the chains 9, 9 grip both side edges of the film a and move it in the direction of the arrow (toward the right in the figure), and during this movement, the left and right clip chains 9, 9 interval, that is, the left and right tenter clips An apparatus for stretching film a to a predetermined magnification by increasing the interval between
A clip chain tension adjustment device is disposed below the sprockets 10, 10 on the entrance side of the tenter.

The conventional example of the clip chain tension adjustment device described above will be explained in detail with reference to FIGS. 2 to 5. The film a shown in FIG.
(double-dashed line in Fig. 2), slides and moves on the rail 4, moves with the clip 5, and is stretched to a predetermined magnification while passing through the tenter, and is then released from the tenter clip 3. Sent to the next process.

The tenter clip 3 is attached to the sprocket 1.
The clip lever 3a is secured by a disc-shaped wear ring 6 provided on the wheel 7 disposed on the upper part of the clip lever 3a.
The lower part of the clip 3b is pushed away from the top of the clip base 5 and takes a standby position for gripping the film a.
When the clip lever 3a is released from the wear ring 6, it can grip the film a.

The wheel 7 is fixed onto the hub 8 with bolts or the like,
The hub 8 has a sprocket 10 fixed to it with bolts or the like, which engages and guides the clip chain 9, and is rotatably attached to the shaft 13 via bearings 11 and 12.

The shaft 13 has a plate 14 fixed to its upper part by bolts 15, etc., a bearing 11, a spacer 16, a bearing 12, and a spacer 17 are arranged on its side parts, and a lower part 13a is connected to a block 19 by a pin 18.
It is fixedly installed.

The block 19 has a flange 1 supported by a recessed groove 4a formed in the rail 4 as shown in FIGS.
9a, a hole 19b into which the lower part 13a of the shaft 13 is inserted, a threaded portion 19c into which the tension bolt 20 is screwed, and a hole 19d into which the bolt 20 is loosely fitted.
2, and is capable of sliding in the left-right direction in FIG. 2 within the hole 4b of the rail 4.

The head of the tension bolt 20 is loosely fitted into the boss portion 4c of the rail 4, and the threaded portion is screwed into the threaded portion 19c of the block 19 to tighten the nut 21.
Fixed by

As shown in FIGS. 2 and 4, a bracket 22 is fixed to the rail 4 with bolts or the like, has a hole 22a into which the tension bolt 20 is loosely fitted, and rotatably supports a shaft 24 integral with a sprocket 23. A collar 25 is fixed to one end of the shaft 24, and a bracket 26 is fixed to the rail 4 with bolts or the like as shown in FIGS. 2 and 3, so that a shaft 28 integrated with a sprocket 27 can be rotated. A lever 29 and a collar 30 are fixed to one end of the shaft 28.

A seat plate 31 is fixed to the block 19 with bolts or the like, and both ends of a roller chain 32 wound around the sprockets 23 and 27 are fixed.

Further, a weight 33 is removably loaded at the lower end of the lever 29, and the lever 29 is configured to constantly move the roller chain 32 in the direction of the arrow H through the shaft 28 and the sprocket 27, that is, to move the roller chain 32 toward the block 1.
9 to the left in FIG. 2, and the sprocket 10 applies tension to the clip chain 9.

That is, in order to apply tension to the clip chain 9, a clip chain tension adjustment device as described above is provided at the lower part of the sprocket 10 on the tenter entrance side, that is, at the lower part of the rail 4, and the tension applied to the clip chain 9 is adjusted. It is necessary that the tension on the return side of the tenter exit side B shown in FIG. 1 be the minimum for the clip chain 9 to move smoothly.

If the tension is too large, the clip chain 9
Also, unnecessary force is applied to the outlet gearbox (not shown), etc., shortening their lifespan. On the other hand, if the tension is too weak, the clip chain 9 may swell or meander due to centrifugal force on the return side of the tenter exit side (b) where the tension is the weakest, causing the slider attached to the rail to bulge or meander. There is a risk of damaging the moving plate, etc.

However, in the conventional clip chain tension adjustment device, when setting the appropriate tension,
It is necessary to convert the tension using the weight 33, which is troublesome, and even if the tension is set to a predetermined value, the tension changes during continuous operation, so it is necessary to correct the tension to the appropriate tension, and the rail 4
Since the adjustment has to be made on the lower side, and each weight 33 weighs 10 to 20 kg, work efficiency is poor, and furthermore, there are drawbacks such as requiring space and causing the weight to swing, which is dangerous. .

The present invention was developed in order to eliminate the above-mentioned drawbacks of the conventional clip chain tension adjustment device. In the clip chain tension adjustment device, a guide member that slidably guides a block that is integrally connected to the sprocket via a shaft; an adjustment bolt that is loosely inserted into the guide member and screwed to the block; a bearing plate rotatably attached to the adjustment bolt;
and a spring loaded between a spring receiving member provided on the bearing plate and the guide member and biasing the sprocket toward the tension applying side of the clip chain via the block and the shaft, The purpose of this is to create a mechanism in which the spring biasing force can be adjusted steplessly through the screw operation of rotating the adjustment bolt, making it possible to steplessly and finely adjust the tension applied to the clip chain. The present invention provides a tenter clip chain tension adjustment device.

The present invention has the above-mentioned structure, and when the adjustment bolt is rotated, the block screwed onto the adjustment bolt is screwed relative to the bearing plate which is rotatably attached to the adjustment bolt. The relative spacing between the bearing plate and the block is finely adjusted steplessly, and the biasing force of the spring loaded between the spring receiving member and the guide member provided on the bearing plate is similarly adjusted. The tension applied to the clip chain by the sprocket via the block and shaft can be adjusted steplessly and finely, and a predetermined tension can be applied to the clip chain.

In addition, in the present invention, the entire device has a compact mechanism, and the tension can be finely adjusted extremely easily and appropriately just by rotating the adjustment bolt.
Stenter performance and reliability can be significantly improved.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. An embodiment of the present invention is shown in FIGS. 6 to 10, and 50 in the figures is a shaft corresponding to 13 shown in FIG. Sprocket 1 that guides clip chain 9 via bearings, spacers, hubs, etc.
0, wheel 7 etc. are installed as described above, and 51 corresponds to block 19 shown in FIG.
4 corresponds to the rail 4 shown in FIG. 1, and the block 51 has a hole 51a (see FIG. 8) into which the shaft 50 is inserted, and a guide member 52.
The flange portion 51b supported on the upper surface of the adjustment bolt 5
The block 51 is provided with a screw hole 51c (FIG. 7) into which the block 3 is screwed, and a main body portion 51d that slides within the elongated hole 52a of the guide member 52. It is integrated with a shaft 50 that rotatably supports the shaft 50, and is slidable in the left-right direction in FIG.

The guide member 52 has a square hole 54 in the rail 54.
The adjustment bolt 53 is inserted into and fixed to the bearing plate by a spigot, and has holes 52b, 52c (Fig. 7) into which the adjustment bolt 53 is loosely inserted, and vertical walls 52d, 52e (Fig. 7). 55, and a stepped portion 53a (positioned in a recess formed between the thrust bearing 56 attached to the bearing plate 55 and the cap 57 (a flange fixed to the bearing plate 55 by bolts or the like). 7) and a chamfered portion 53b on which the handle 58 is attached and detached, and is screwed into and penetrated by the screw hole 51c of the block 51.

Further, spring anchors 59, 59 are screwed to both ends of the bearing plate 55, and a pointer plate 60 (seventh
) is fixed, and the guide shaft 61 is loosely inserted into the hole 59a of the spring anchor 59 and the hole 52f of the guide member 52, and is inserted by the flanges at both ends as shown in FIG.

Further, the compression spring 62 is loosely fitted into the guide shaft 61 and located between the spring receiver 63 (loosely fitted into the hole 52g) and the guide member 52 located on the distal end side of the spring anchor 59.
The bearing plate 55 is loaded between the spring bearings 64 on the side, and the spring bearing plate 55 is always biased to the left in FIG. 50
The structure is such that the sprocket 10 (FIG. 2) is likewise spring-biased to the left through the spring, thereby applying tension to the clip chain 9.

As shown in FIG. 10, a clamp 65 made of a pair of clamp members is arranged on the end face side of the cap 57 to prevent the adjustment bolt 53 from rotating with a bolt 66, a net 67, etc., and one of the clamp members of the clamp 65 is It is fixed to the cap 57 with screws 68, etc., and the other clamp material can be attached and detached, and as shown in FIGS. 6 and 7, the pointer plate 6
A scale plate 69 facing 0 is fixed to the guide member 52, and a numerical value converted to the tension applied to the clip chain 9 is applied to the scale plate 69. Further, a bottom plate 70 is attached to the lower part of the block 51 to facilitate the movement of the block 51.

The clip chain tension adjustment device of the illustrated embodiment has the above-described configuration, so when adjusting the tension of the clip chain 9, first loosen the bolt 66 and nut 67, and then loosen one of the clamp members of the clamp 65. The attractive force can be adjusted by removing the adjustment bolt 53 and rotating the adjustment bolt 53 using the handle 58.

That is, when the adjustment bolt 53 is rotated clockwise, for example, the block 51 screwed into the adjustment bolt 53 is rotated, and the bearing plate 55, which is rotatably attached to the adjustment bolt 53 (this rotation is caused by the guide shaft 61 7), the bearing plate 5 slides relatively to the left in FIG.
The distance between the sprocket 5 and the block 51 is reduced, and as a result, the sprocket 10 is moved in the same direction through the block 51, the shaft 50, etc., and applies tension to the clip chain 9. The reaction force is reversed by the adjustment bolt 53,
A load is applied to the compression spring 62 through a spring bearing member consisting of a bearing plate 55, a spring anchor 59, and a spring bearing 63.
By increasing the spring biasing force of the compression spring 62, the tension on the clip chain 9 can be adjusted to increase, and if the adjustment bolt 53 is rotated counterclockwise, the tension can be decreased due to the reverse effect. is possible.

Also, after the adjustment, the bolt 66 and nut 67 are
By tightening the adjustment bolt 53 with the clamp 65 to stop its rotation, it is possible to prevent the tension from being lowered due to vibrations during operation.

Therefore, according to the embodiment, the adjustment bolt 53
The movement of the block 51, that is, the sprocket 10, which is slid by the clip chain 9 is stepless due to the screw movement and can be finely adjusted.
The tension can be finely adjusted in a stepless manner, and an appropriate predetermined tension can always be applied to the clip chain 9.

In addition, the entire device has a compact mechanism as shown in the figure, and can be finely adjusted very easily and properly by rotating the adjustment bolt 53, and the tenter performance and reliability can be significantly improved. By preventing the adjustment bolt 53 from rotating,
This has the advantage that it is possible to prevent a decrease in the tension of the clip chain 9, and that the tension adjustment work can be easily and simplified by reading the scale on the scale plate 69.

Note that this embodiment is applicable to a tentering machine, a biaxial stretching machine, etc.

Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to such embodiments, and that various design modifications can be made without departing from the spirit of the present invention. .

[Brief explanation of drawings]

Figure 1 is a plan view showing the outline of a conventional tenter.
Figure 2 is a cross-sectional view of the part shown in Figure 1, Figure 3 is a cross-sectional view of the part shown in Figure 2, Figure 4 is a cross-sectional view of the part shown in Figure 2, and Figure 5 is a cross-sectional view of the part shown in Figure 2. - A sectional view of the part, FIG. 6 is a front view of the part corresponding to FIG. 2 showing an embodiment of the present invention, and FIG.
FIG. 8 is a sectional view of the section ``-'' in FIG. 7, FIG. 9 is a sectional view of the section ``-'' in FIG. 7, and FIG. 10 is a sectional view of the section ``-'' in FIG. A: Tenter entrance side, 9: Clip chain,
10: Sprocket, 50: Shaft, 51: Block, 52: Block member, 53: Adjustment bolt, 55: Bearing plate, 59: Spring anchor, 62:
Spring (compression spring), 63, 64: Spring holder.

Claims (1)

[Claims] 1. In a tenter clip chain tension adjustment device disposed below the sprocket on the tenter entrance side that guides the clip chain, a block integrally connected to the sprocket via a shaft is slidably guided. a guide member, an adjustment bolt loosely inserted into the guide member and screwed to the block, a bearing plate rotatably mounted on the adjustment bolt, a spring bearing member provided on the bearing plate, and the guide member. A clip chain tension adjustment device for a tenter, characterized in that a spring is loaded between the sprocket and the sprocket to urge the sprocket toward the tension applying side of the clip chain through the block and the shaft.