JPS6340655B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a clip closer applied to a film tenter, a biaxial stretching machine, and the like.

1 to 3 show an example of a conventional tenter clip holding device for holding a film or the like. In the figure, 1,1 is a pair of left and right tenter clips,
The tenter clips 1, 1 are respectively mounted on a pair of clip bases 3, 3 which are slidably disposed on a rail 2, facing each other as shown.

In addition, the clip stands 3, 3 are attached to a tenter 8, which will be described later.
It moves at a predetermined speed from the inlet to the outlet, turns 180 degrees at the outlet, and returns to the inlet. 4 is a clip body attached to the clip base 3;
It has an arch-shaped standing part that stands up from a,
A clip lever support shaft 5 is provided at the tip of the upright portion. 6 has its almost central part connected to the support shaft 5.
The clip lever 6 is formed of an upper lever 6a and a lower lever 6b, which are supported by the support shaft 5 as a boundary.

7 is a liner attached to the base 4a of the clip body 4; 12 is a tension spring tensioned between the upper lever 6a of the clip lever 6 and the clip body 4;
is always rotated about the support shaft 5 from the state shown by the two-dot chain line shown in FIG. It is designed to be held by the ears.

In FIG. 3, reference numeral 8 denotes a tenter, and 9a and 9b denote a clip opener and a clip closer disposed at the outlet of the tenter 8 as shown in FIG.
9c and 9d are a clip opener and a clip closer provided at the entrance of the tenter 8;
Reference characters a and 10b indicate wear rings disposed at the outlet and inlet of the tenter 8, respectively.

Now, as will be described later at the entrance of the tenter 8, the left and right ears are gripped between the lower edge 6c of the lower lever 6b of the left and right clip levers 6 and the liner 7 on the base 4a, and the left and right rails are gripped. 2,
The film 11 that moves together with the clip tables 3, 3 sliding on the tenter 8 is stretched to a predetermined magnification while passing through the tenter 8. Since the levers 6a and 6b contact the clip opener 9a and the wear ring 10a at the outlet of the tenter 8, the left and right clip levers 6 and 6 resist the tension spring 12 and are in the state shown by the two-dot chain line in FIG. The film 11 is rotated to release the grip on the ears (ends on both sides) of the film 11, and send the film 11 to the next process.

Next, while the left and right tenter clips 1, 1 change direction by 180 degrees, the upper lever 6a comes into contact with the wear ring 10a and the clip closer 9b, so that the clip lever 6 is moved by the biasing force of the tension spring 12 as shown in FIG. The state returns to the solid line state. On the other hand, at the entrance of the film 11 to the tenter 8,
The clip lever 6 is returned to the state shown by the two-dot chain line in FIG. 1 by the clip opener 9c and the wear ring 10b, and then returns to the state shown by the solid line shown in FIG. (Both ends) are designed to be gripped.

However, according to FIGS. 1 to 3, the film 11 is stretched to a predetermined magnification while passing through the tenter 8, and at the outlet of the tenter 8, the upper lever 6a of the clip lever 6 is opened to the clip opener 9a and the wearer. By contacting the ring 10a, the clip lever 6 rotates about the support shaft 5 against the tension spring 12 to the state shown by the two-dot chain line, thereby releasing the film 11.

Next, while the left and right tenter clips 1, 1 change direction by 180 degrees, the wear ring 10a and the clip closer 9b continue to come into contact with the upper lever 6a, and the clip lever 6 gradually returns to the state shown by the solid line in FIG. In this case, the edge 6c (lower end) of the lower lever 6b of the clip lever 6
This caused a problem in that the edge 6c of the lower lever 6b was damaged because the liner 7 and the liner 7 came into direct contact, resulting in metal-to-metal contact.

Furthermore, at the entrance of the film 11 to the tenter 8, the biasing force of the tension spring 12 as described above
The film 11 is gripped by the ears (ends on both sides), but since the position of the clip lever 6 is not checked in the gripped state, the film 11 is conveyed to the exit section without being gripped. As a result, there was a risk of producing defective films.

The present invention was proposed in order to solve the above-mentioned conventional drawbacks, and includes a pair of clip stands that are installed from the entrance to the exit of the tenter and move on a rail that reverses from the exit and returns to the entrance. When gripping a film or the like at the entrance of the tenter, the tenter clip has a clip lever rotatably provided on each clip body installed on the top of the tenter. A clip closer that rotates a lever includes a wear disk that contacts the clip lever, an arm that rotatably supports the wear disk, a retainer that holds a compression spring between one end of the arm, and the other end of the arm. By rotatably supporting the retainer and comprising a support bracket that is integrated with the retainer, problems such as damage to the edges can be eliminated, and the film, etc. will not be conveyed to the exit section without being gripped, thereby preventing defects. It is an object of the present invention to provide a clip closer device that can prevent the occurrence of film, etc.

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 4 to 8 show embodiments of the present invention, FIG. 4 is a partial sectional view of the film in the gripped state, and FIG. 5 is a partial sectional view of the film in the open state. 6 is a view taken along the arrow in FIG. 5, FIG. 7 is a front view with a part of the pressing device omitted, and FIG. 8 is a plan view of only the lower half of the tenter entrance.

In FIGS. 4 and 5, reference numeral 4 denotes a clip main body, and the clip main body 4 has an arch-shaped upright part rising from a base 4a, and a clip lever support shaft 5 is provided at the tip thereof. The fact that a liner 7 is provided on the base 4a is almost the same as the clip body of the conventional device, and the same parts as in FIGS. 1 to 3 are given the same reference numerals. be. Although not shown in the drawing, the clip main body 4 is attached to the left and right rails 2, shown in FIG.
2, respectively mounted on clips 3, 3, each slidably mounted on.

Reference numeral 21 includes a boss portion 22 rotatably supported on the clip lever support shaft 5, a bracket 24 protruding from the boss portion 22, and an upper lever portion 21a.
A clip lever consisting of a lower lever part 21b,
The boss portion 22 is rotatably supported by the clip lever support shaft 5. Also, the clip lever 21
At the tip of the lower lever 21b, there is an edge 3 that grips the film 11 between it and the liner 7 of the base 4a.
2 is attached as shown.

27 has one end attached to the crack 23 in the bracket 24.
It is a cylindrical member that is rotatably supported via a spring pin 23 having a diameter of 1.a, and within the notch 25 at the other end of the cylindrical member 27 is a crack 30a fixed in place on the clip body 4. Spring pin 30 with
is loosely fitted (Figure 7).

Further, a compression spring 29 is interposed between retainers 28 and 28 that are slidably fitted around the outer periphery of both ends of the cylindrical member 27. and the cylindrical member 2
7. Always bias the clip lever 21 to the state shown in FIG. 4 using the retainers 28, 28, compression springs 29, spring pins 23, 30, etc.
A pressing device 2 grips the edge of the film 11 between the edge 32 of the film 1b and the liner 7 on the base 4a.
6 is formed. Reference numeral 31 denotes a horizontal connecting member of the clip main body 4, in which a notch 31a is formed to avoid interference with the pressing device 26.

Next, a clip closer device showing an embodiment of the present invention will be explained using FIGS. 8 to 13. Now, Fig. 9 is a sectional view in Fig. 8, Fig. 10 is a sectional view in Fig. 8, Fig. 11 is a sectional view taken along line XI-XI in Fig. 8, and Fig. 12 is a sectional view of the main parts of the clip closer device. The sectional view and FIG. 13 are plan views of only the upper half of the tenter.
5, the retainer 36, the support bracket 37, etc., and the upper lever 21a of the clip lever 21.
Contact the wear disk 34 to the film 1.
It is designed to hold the ears of 1.

The wear disk 34 has a disk shape, and the holder 3
8 with bolts 39, etc., and the same holder 3
8 is fixed to the shaft 40 with bolts 41 or the like (FIG. 9). Further, the arm 35 rotatably supports the shaft 40 via a bearing 43 or the like at a central portion 42, and also fixes the cap 44 with a bolt 45 or the like and the grease spot 46 with a bolt 47 or the like.

As shown in FIG. 11, the support bracket 37 connects the boss 48 of the arm 35 to the brackets 49 and
It is rotatably supported by a pin 51 or the like in between.
Brackets 49 and 50 project from plate 52. A housing 53 is fixed by bolts (not shown) between brackets 54 and 55 protruding from the plate 52 as shown in FIG. 12, and supports the retainer 36 in which the compression spring 56 is loaded.

Reference numeral 57 denotes an arm-side housing that supports a retainer 58 on the opposite side of the central portion 42 of the boss portion 48, as shown in FIG. 12, and holds the compression spring 56 between it and the retainer 36. The compression spring 5 also comes into contact with the adjustment bolt 59 screwed onto the plate 52.
6 and the upper lever 2 of the wear disk 34 and the clip lever 21.
This is to adjust the spacing between 1a and 1a.

A main bracket 60 has one end fixed to the plate 52 with a bolt (not shown) or the like, as shown in FIG. 9, and a block 62 having a screw hole 61 formed at the other end. A plate 63 is fixed to the main bracket 60 with bolts 64 or the like, and is integrated with the support plate 65 by welding or the like. A reinforcing plate 66 is fixed to both ends of the support plate 65 by welding or the like, and the shaft 6
7 and 68 are loosely fitted.

69 is a screw that is screwed into the screw hole 61 of the block 62 and fixed with a nut 70, one end of which is loosely fitted with the support plate 71, and the other end of which the flange 72 is brought into contact with the support plate 73;
Further, the cylindrical portion 74 is loosely fitted into the support plate 73, and a chamfered portion 75 is formed at the tip. As shown in FIG. 10, both ends of the support plate 71 are fixed to a plate 77 with bolts 76 or the like. The plate 77 is attached to the shafts 67, 6
8 by welding etc.

The shafts 67 and 68 are connected to the narrow diameter portion 2 as shown in Fig. 10.
8, a large diameter portion 79, and a sliding portion 80. 81 is a connecting plate, shafts 67, 68
It is fixed to the end face of the sliding part 80 with bolts 82 etc., and the support plate 7 described above is fixed to the central part.
3 are fixed together by welding or the like. 83, 84
is a guide block that guides the shafts 67 and 68 in a slidable manner, and is connected to the base plate 85.
It is fixed by welding, etc. 86 is an air cylinder, and a bolt 87 is attached to the base plate 85 as shown in Fig. 9.
The piston rod 88 is screwed into the support plate 73 and the connection plate 81, and is fixed with a nut 89. 90 again
is a safety cover.

Next, to explain the operation, at the entrance of the tenter 8, press the lower lever 2 of the clip lever 21 on both ears.
1b and the liner 7 on the base 4, as the clip base moves on the left and right rails (not shown) (in the direction perpendicular to the plane of the paper). Film 11 moves,
While the film 11 passes through the tenter 8,
It is stretched to a predetermined magnification.

At the outlet of the tenter, the upper lever 21a of the clip lever 21 comes into contact with the clip opener 9a at the outlet of the tenter, thereby resisting the biasing force of the pressing device 26 and pivoting around the clip lever support shaft 5 as shown in FIG. Rotate as shown in FIG. 2 to release the grip on the edge of the film 11 between the edge 32 of the lower lever 21b and the liner 7 of the base 4a,
Film 11 is opened.

Next, the clip lever 21 is moved to the fifth position by bringing the lower end of the lower lever 21b into contact with the clip main body 4.
It stops in the state shown in the figure, but at this time, the pressing device 26 rotates clockwise around the spring pin 30 (however, the pressing device on the left side, not shown, is counterclockwise), and after passing the dead center, The state shown in FIG. 5 is maintained to maintain the open state of the film 11.

That is, while the tenter clip rotates 180 degrees and returns to the entrance of the tenter 8, the clip lever 21
The edge 32 of the lower lever 21b and the liner 7 on the base 4a are maintained at a predetermined distance. In this way, the clip lever 21
It reaches the entrance of the tenter while remaining in the state shown in the figure.

At this time, the wear disk 34 of the clip closer device 33 is installed at a predetermined position (pressurized air is supplied to the piston rod 88 side of the air cylinder 86, and the shafts 67 and 68 are moved toward the right in FIG. (the large diameter portion 79 is in contact with the guide blocks 83, 84). Upper lever 2 of clip lever 21
1a rotates clockwise along the outer periphery of the wear disk 34 against the pressing device 26 as shown in FIG. 12, and the clip lever 21 is in the state shown in FIG. Head towards the exit of the tenter.

In addition, the position of the wear disk 34 is such that while it moves from the upper lever 21a indicated by a chain double-dashed line to the upper lever 21a indicated by a solid line in FIG.
1b and the liner 7 on the base 4a, so that the edge of the film 11 can be reliably gripped, and in particular, at the position of the upper lever 21a shown by the solid line, the arm 35 is in the 12th position. In the figure, it is rotated counterclockwise to press the compression spring 56.

Since the present invention is constructed as described in detail above, the edge of the clip lever and the liner on the base do not come into direct contact with each other without interposing the edge of the film between the edge and the liner on the base. Therefore, defects such as damage to edges are eliminated, the service life of the parts is extended, and there is no need to install clip openers or wear rings, which reduces the number of parts and reduces the cost of the device.

Furthermore, even if the clip levers in the gripping state are misaligned, the clip closer device of the present invention can reliably grip the film, preventing the film, etc. from being conveyed to the exit section without being gripped, and resulting in the occurrence of defective films, etc. can be prevented. Furthermore, even if an abnormal force is applied to the clip closer device due to uneven positions of the clip levers, the compression spring deforms, making it possible for the wear disk to retract and protect the clip closer device. .

On the other hand, the position of the wear disk can be finely adjusted by rotating the screw and moving the main bracket. Furthermore, by supplying pressurized air to the piston side of the air cylinder, the main bracket and the like are guided by the guide block, and the entire clip closer device is moved toward the center of the film, thereby releasing the contact between the wear disk and the clip lever. In the case of a tension spring type clip gripping device as shown in FIG. 1, the clip closer 9 is shown in FIG.
In place of d, a clip closer device or the like of the present invention may be employed.

[Brief explanation of drawings]

Figure 1 is a front sectional view of a conventional film tenter that widthens a film in a direction perpendicular to the film running direction, Figure 2 is a perspective view of a tenter clip in the same machine, and Figure 3 is a perspective view of a tenter clip in the same machine. 4 is a front sectional view of a tenter clip showing an embodiment of the present invention, FIG. 5 is a front sectional view of a tenter clip in a different operating state from FIG. 4, and FIG.
7 is a front view of the pressing device in FIG. 6, FIG. 8 is a plan view of the lower half of the tenter entrance, FIG. 9 is a cross-sectional view of FIG. 8, and FIG. 10 is a front view of the pressing device in FIG. Figure 8 is a cross-sectional view, Figure 11 is Figure 8's XI~
12 is a sectional view of the main part of a clip closer device showing an embodiment of the present invention, and FIG. 13 is a plan view of only the upper half of the tenter. Explanation of the main parts of the figure, 2...Rail, 3...Clip base, 4...Clip body, 5...Clip lever support shaft, 11...Film, 21...Clip lever, 34...Wear disk, 35 ... Arm, 36 ... Retainer, 37 ... Support bracket, 56 ... Compression spring.

Claims (1)

[Claims] 1. A clip lever is rotatably attached to a clip body installed on a pair of clip stands that are installed from the entrance to the exit of the tenter and move on rails that reverse from the exit and return to the entrance. In a clip closer that contacts a clip lever and rotates the clip lever when gripping a film or the like at the entrance of the tenter using a gripping device for the film or the like using a tenter clip provided therein, a wear disk that contacts the clip lever; An arm that rotatably supports the wear disk, a retainer that holds a compression spring between one end of the arm, and a support bracket that rotatably supports the other end of the arm and is integral with the retainer. A clip closer device comprising: