JPH07108599A - Slide type tenter frame - Google Patents

Abstract

PURPOSE:To allow a tenter clip to smoothly run by constituting a slide type tenter frame so as to have such a structure that a guide plate straddles the joint of the connection parts of adjacent rails continuously to be fixed to the rails only on the downstream end part side of a tenter and the other part thereof is made slidable along the vertical surfaces of the rails. CONSTITUTION:The clips 29 nipping a film 1 at the inlet part of a tenter frame runs in contact with a front vertical guide plate 21 and a bottom part guide plate 23 while the horizontal tensile force acting on the clips 29 is received by the guide plate 21 and the downsard load such as the own.wt. of the clips 29 is received by the guide plate 23 to reach the connection part of rails. At this time, lubricating oil is usually supplied to the guide surfaces of the guide plates and the front vertical guide plate 21 and a rear vertical guide plate 22 are continuously connected through the adjacent rails and the bottom guide plate 23 and an upper guide plate 24 are obliquely lapped in a mutually intricate state on the same plane and, therefore, the clips 29 coming to the connection part of the rails can run smoothly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding type tenter frame which can be used in a film tenter, a biaxial stretching machine and the like.

[0002]

2. Description of the Related Art As an example of the prior art, Japanese Patent Laid-Open No. 1-1394
A description of the proposal in Japanese Patent Publication No. 56 will be given with reference to FIG.
Is a partial sectional view of the tenter frame shown in the publication, and FIG. 7 is a plan view of the rail connecting portion. 6 and 7,
30 is a clip, and the same clip 30 is a clip body 32
And a clip base 33, and a clip body 32
A clip lever 31 is rotatably supported by a lever pin 39, and a film gripping force is applied by a pressing device 37 having a compression spring (not shown) incorporated therein, and the blade edge 31a of the lever and the clip body 32 are provided. Liner surface 32a
The film is designed to be gripped between and. Also, the clip body 32 is fixed to the clip base 3 by the bolt 36.
It is fixed on 3.

The clip base 33 has a substantially U-shaped cross section, and is arranged so that the side surface comes to the side of the cutting edge 31a (front side). A roller link 34 is fitted into the clip base 33 by a link pin 35, and the roller link 34 is connected to an adjacent clip 30 to form an endless chain structure.
Reference numerals 40 and 50 denote rails adjacent to each other, each of which has a front vertical guide plate 43, 53 and a bottom sliding plate 44, 5 described later.
4 is held and the running tracks 41 and 42 of the clip 30 are formed. The front vertical guide plates 43 and 53 are provided with countersunk screws 45 and cap nuts 4 inside the front surfaces of the rail units 40 and 50, respectively.
The clip base 3 is fixed by 6 and has one end extending across the rail connecting portion.
3 has a guide surface 43a for guiding the front surface and a guide surface 53a (not shown).

Further, the bottom sliding plates 44 and 54 are the rail unit 4
The rear vertical guide plates 44b vertically protruding upward in the longitudinal direction are integrally formed with the bottom surfaces of the clip bases 33a, 54a (54a). ) And a guide surface 44c (54c) for guiding the rear side surface of the clip base 33. As shown in FIG. 7, these bottom sliding plates 44 are crescent-shaped bottom sliding plates 6 to be described later at both ends in the longitudinal direction.
It has engaging contour lines 44d and 54d that match 0 and 62. The crescent-shaped bottom sliding plate 60 is a rail unit 40, 5
In the connection portion of 0, one end is fixed to the end of the rail single body 40 by a bolt 61, and the other end is not fixed across the gap 85 between the adjacent rail single bodies 50, and is simply mounted on the rail single body 50. It is placed. Also, the crescent-shaped bottom sliding plate 62 on the target side is the opposite, and one end is the rail unit 50.
Is fixed to the rail unit 40 adjacent to the other rail 40 by the bolt 63.

FIG. 8 is a sectional view taken along line D--D of FIG. 7 and 8, 70 and 71 are rail connection bosses,
One rail connecting boss 70 has a connecting hole 70a and is fixed to the rail unit 40 by a bolt 72. The other connecting boss 71 also has a connecting hole 71a, and the bolt 7
It is fixed to the adjacent rail unit 50 by 2. The two bosses 70, 71 are respectively formed in the holes 70a, 71.
It is rotatably connected by a pin 74 penetrating a. 75 and 76 are guide plate holders fixed to the rails 40 and 50, and one guide plate holder 75 (76)
Has a groove 75a (76a) on the lower surface of the end, and the bolt 77
It is fixed to the rail unit 40 (50) together with the connecting boss 70 (71) by (78). In addition, the groove 75a
The rear vertical guide plate 44e (54e), which is formed separately from the rear vertical guide plate 44b at the tenter rail connecting portion and has a high flexibility, is fitted in (76a), and It forms a vertical guide plate. A guide holder 76 is also fixed on the adjacent rail unit 50 by bolts 78, and the groove 76a of the holder 76 holds the end portion of the rear vertical guide plate. The lower end of the rear vertical guide plate 44a in the connecting portion is provided at the bottom sliding plate 4
It is slidable on 4, 60 and 62.

At the connecting portions of the adjacent single units 40 and 50, gaps 48 and 58 are formed between the rail units 40 and 50 and the front vertical guide plate 43, and the front vertical guide plate 43 and the rear vertical guide plate 44e. When it bends, its deformation is allowed (FIG. 9). In FIG. 6, reference numeral 80 denotes a heat insulating cover having a heat insulating material inside,
It is provided to prevent the temperature of 0 from rising due to hot air from a nozzle (not shown). Reference numeral 81 (FIG. 6) is a safety cover for ensuring safety from the running clip 30. FIG. 10 shows a joint structure at each connecting portion of the front vertical guide plates 43 and 53 and the rear vertical guide plates 44e and 54b, which are engaged with each other in a comb shape as shown in the drawing.

Next, the operation will be described with reference to FIGS. 6 to 10. In the clip 30 in which the film is nipped at the entrance of the tenter frame as in the conventional apparatus, the horizontal pulling force acting on the clip 30 is applied to the front vertical guide plate 43. And the rear vertical guide plate 44b, and at the same time, the bottom slide plate 44 receives a downward load such as its own weight of the clip 30 and contacts the respective guide surfaces 43a, 44a, 44c in the direction of arrow A in FIG. Drive to the rail joint. At this time, lubricating oil is supplied to each of the guide surfaces 43a, 44a, 44c. In the clip 30 coming to the connecting portion of the rail, the front vertical guide plate 43 and the rear vertical guide plate 44e of the connecting portion are continuously connected to the adjacent rail, and at the bottom, the bottom sliding plates 44 and 54 are formed in an arc shape. Since the crescent-shaped bottom slide plates 60 and 62 having the engaging contours always form a continuous surface, the vehicle can travel smoothly. Then clip 30
Come to the joint portions 55 and 56 of each vertical guide plate, but since the joint portions 55 and 56 mesh with each other like comb teeth as shown in FIG. 10, there is no step, and the clip 30 is formed at this portion. It is possible to obtain smooth running continuously.

In particular, in FIG. 9, even when the adjacent rail unit 50 has an inclination of the angle β, the front vertical guide plate 43 and the rear vertical guide plate 44e are curved 43d and 44f, respectively.
In this case, the clip 30 is continuously guided. In the above conventional example, the crescent-shaped bottom sliding plate 60 and the bottom sliding plate 44 having an engaging surface with the sliding plate 60 are described as separate bodies in the rail connecting portion, but the crescent-shaped bottom sliding plate is described. While removing the moving plate 60, a portion having a predetermined arc-shaped curve is integrally provided at the tip of the moving plate 60, and the bottom sliding plate 4
Only 4 may be extended to the end of the rail unit 40. In the structure described above, the guide surface of the clip is continuous with no step and no gap, so that the dance, vibration, and noise of the clip are reduced, and high-speed operation is possible.

[0009]

In the above-mentioned conventional example, the bottom sliding plate uses a crescent-shaped bottom sliding plate at the connecting portion to eliminate the step during the clip running, but at the joint part of each vertical guide plate. It meshes in a comb shape, and there is no step at the meshing part, and there is also a large gap, so the smooth running of the clip is disturbed, the film breaks at high speed, vibration, noise Remains unremoved. Also, the clip is a film stretching process, so 180 ° C
Since the vehicle travels in a high temperature environment in the front and rear, the lubricating oil deteriorates quickly and the guide plate of the rail is easily worn.
SUMMARY OF THE INVENTION The present invention provides a sliding type tenter frame in which a means for allowing the tenter clip to travel more smoothly is provided to solve the above-mentioned conventional problems.

[0010]

Therefore, according to the present invention, a large number of rail units are connected to each other at a predetermined interval, and a pair of left and right rails are installed endlessly from the inlet portion to the outlet portion of the tenter, and a pair of rails on the same rail. In a tenter frame consisting of a tenter clip having a clip base that slides and moves, a flexible long guide plate is provided on a vertical surface facing the front and rear sliding surfaces of the clip base in the rail,
The guide plate continuously straddles the joints of adjacent rails, is fixed to the rail only on the downstream end side of the tenter, and the other part can slide along the vertical surface of each rail unit. It is a structure, and this is used as a means for solving the problem. Further, according to the present invention, a large number of rails are connected to each other at a predetermined interval, and have a pair of left and right rails installed at end portions from an inlet portion to an outlet portion of the tenter, and a clip base slidingly moving on the rails. In a tenter frame including a tenter clip, a guide plate is fixedly provided on a rail surface facing the upper and lower sliding surfaces of the horizontal bottom portion and the upper clip base of the rail unit, and the guide plate is provided at a connecting portion of adjacent rails. The edges of the joints are cut obliquely, and the cut surfaces are arranged so as to face each other with a constant gap therebetween, and this is a means for solving the problem. Further, according to the present invention, a plurality of rails are connected to each other at a predetermined interval, and a tenter having a pair of left and right rails endlessly installed from an inlet portion to an outlet portion of the tenter and a clip base slidably moving on the rail. In a tenter frame including a clip, the clip base is a molded product in which a metal member is inserted into a synthetic resin having high heat resistance and wear resistance, and the sliding surface of the clip base is covered with a synthetic resin material. The chain link part and the clip body mounting part of are structured such that the metal member is exposed,
This serves as a means for solving the problem.

[0011]

[Function] By guiding the front and rear of the tenter clip by the flexible long guide plate provided on the vertical surface of the rail, even when an angle is provided between the rails of a plurality of rails,
Since the guide plate continuously guides the front and rear sliding parts of the tenter clip with a large radius of curvature across the gap of the rail itself, shocking acceleration is not applied to the running tenter clip and vibration noise is also reduced. be able to. In addition, the tenter clip guides are arranged so that the joint ends of the adjacent rails are diagonally cut at the horizontal bottom and top of the rail itself, and the cut surfaces face each other with a certain gap. By providing a plate, even if there is a slight angle between the rails of multiple rails, the sliding parts at the top and bottom of the tenter clip wrap around the slanted guide plate and transfer, so the tenter clip travels smoothly. can do. Furthermore, by using the injection-molded clip base in which a metal member is inserted in a synthetic resin with high heat resistance and wear resistance, the chain link part and the clip body mounting part have mechanical dimensions and strength due to the metal member of the insert. The sliding surface of the synthetic resin material, which is held, can have effective lubricity with respect to the guide plate made of metal material provided on the rail.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings. FIGS. 1 to 5 show an embodiment of the present invention. FIG. 1 is a partial sectional view of a tenter frame, and FIG. FIG. 3 is a plan view of the rail connecting portion according to FIG. In FIGS. 1 and 2, reference numeral 29 denotes a clip, which is composed of a clip body 32 and a clip base 13, and a clip lever 31 is rotatably supported by a lever pin 39 on the clip body 32. A holding device for holding the film 1 is applied by a pressing device having a compression spring (not shown) installed therein, and the film 1 is held between the cutting edge 31a of the lever and the liner surface 32a of the clip body 32. There is. The clip body 32 is fixed on the clip base 13 by bolts 36. The above clip body structure is the same as that described in the conventional example.

The clip base 13 has a substantially U-shaped cross section, and is arranged so that its side surface comes to the cutting edge 31a side (front side). A roller link 34 is fitted into the clip base 13 by a link pin 35, and is connected to an adjacent clip 29 by the roller link 34 to form an endless chain structure.
Reference numerals 10 and 10 'are adjacent rails, each of which holds a front vertical guide plate 21, a rear vertical guide plate 22, a bottom guide plate 23, and an upper guide plate 24, which will be described later, and a clip 29.
Forming traveling tracks 11 and 12.

The front vertical guide plate 21 is a rail unit 1
0, 10 ', etc. is a long and flexible plate-like member provided along the inside of the front surface, fixed to the rail at the downstream end of the tenter, and the upper edge of each rail unit 10, 10'. Groove 25a provided in the guide plate holding metal fitting 25 attached to
The bottom of the rail unit 10, 10 'and the bottom guide plate 23
The upper and lower sides and the front and rear sides are constrained by a gap between them, and they are slidably supported in the longitudinal direction. The front vertical guide plate 21 is arranged so as to straddle the rail connecting portion and guides the front sliding surface 15b (FIG. 4) of the clip base 13. On the other hand, the rear vertical guide plate 22 is a long flexible plate-like member provided along the inner side of the rear surface of each rail unit 10, 10 'and is fixed to the rail at the downstream end of the tenter. ,
As shown in FIGS. 1 and 5, each rail unit 10, 1
Flange washer 27 attached to 0 ', etc. with bolts 26
The upper and lower sides and the front and rear sides are restrained by and are supported slidably in the longitudinal direction by utilizing the elongated holes 22a of the rear vertical guide plate 22. Further, the rear vertical guide plate 22 is disposed so as to straddle the single rail connecting portion, and guides the rear sliding surface 15c of the clip base 13. Adjacent rail unit 10,1
When 0'and the like take a required angle, the long front vertical guide plate 21 and the rear vertical guide plate 22 are fitted in a groove or a gap attached to an extent that allows the deformation when the front vertical guide plate 21 and the rear vertical guide plate 22 bend at the connecting portion. You have the room to do it.

Reference numerals 23 and 24 denote a bottom guide plate and an upper guide plate fixed to the bottom surface and the top surface of the rail units 10 and 10 ', respectively, by bolts, and the sliding surface 1 at the bottom portion of the clip base 13.
5d (FIG. 4) and the sliding surface 15e on the upper rear surface of the clip base 13 are guided. As shown in FIG. 2, the bottom guide plate 23 and the upper guide plate 24 have both ends in the longitudinal direction machined at a constant angle, and are arranged so that diagonal parallel gaps are formed between adjacent rail units. The sharp-angled end portions can be slid on the adjacent rail units 10 and 10 '.
1 and 2 are rail connecting bosses. One rail connecting boss 10b has a connecting hole, and the connecting boss 10'a of the adjacent rail unit 10 'has a connecting hole and a pin 16. It is rotatably connected.

The clip base 13 shown in FIG. 4 has a metal member (metal core) 14 made of a synthetic resin having high heat resistance and abrasion resistance (eg, polyimide, polyetheretherketone, polyethersulfone, polyamideimide, polyarylate). The injection-molded product is inserted (15 is a synthetic resin portion, and 15a is a synthetic resin for joining filled in a hole formed in a metal member). The sliding surfaces 15b, 15c, 15d, 15e of the clip base 13 are surfaces of synthetic resin material, and the chain link portion 14 into which the roller link 34 is fitted into the clip base 13 by the link pin 35.
The metal members of the a and 14b and the clip body mounting portion 14c are exposed.

The operation of the embodiment configured as described above will now be described. The clip 29, which nips the film 1 at the entrance of the tenter frame as in the conventional apparatus, applies the horizontal pulling force acting on the clip 29 to the front surface. Vertical guide plate 21
At the same time, the bottom guide plate 23 receives a downward load such as the own weight of the clip 29, travels in the direction of the arrow shown in FIG. 2 while contacting the respective guide surfaces, and reaches the rail connecting portion. At this time, lubricating oil is normally supplied to each guide surface. Further, the front vertical guide plate 21 and the rear vertical guide plate 22 are continuously connected through the adjacent rails, and the bottom guide plate 23 at the bottom and the upper guide plate 24 at the top are on the same plane and obliquely wrap into each other. The clip 29 coming to the connecting portion of the rail can travel because it is out.

In particular, as shown in FIG. 3, even when the adjacent rails have an inclination of an angle α, the flexible front vertical guide plate 21 and rear flexible vertical guide plate 22 are each gently curved. Guide the clip 29 smoothly. Heat resistance,
If the injection-molded clip base 13 in which the metal member 14 is inserted into the synthetic resin portion 15 having high wear resistance is used, the chain link portion 14a and the clip body mounting portion 14c are used.
Holds mechanical dimensions and strength by the inserted metal member 14, and the sliding surfaces 15b, 15 of the synthetic resin portion 15
c, 15d, and 15e have effective lubricity with respect to the guide plates (front vertical guide plate 21, rear vertical guide plate 22, bottom guide plate 23, and upper guide plate 24) made of metal material provided on the rails. it can.

[0019]

As described in detail above, according to the present invention, since the long flexible vertical guide plate is continuously provided without a break over the joint of the rails, it is possible to separate the rails from each other. Even when it is angled, the running clip can smoothly change its direction. In addition, the horizontal bottom and top vertical guide plates of the rail have end portions that are cut so that the end portions that are the joints of the rails are diagonally opposite to each other, and the clip during travel can be smoothly transferred. At the same time, the cost is low because of the simple structure. Further heat resistance,
The clip base is an injection-molded product in which a metal member is inserted into a synthetic resin with high wear resistance, and the chain link part and the clip body mounting part have exposed metal members.The clip base is sufficient for mounting the clip body and chain function. It has strength and is guided by each vertical guide plate and vertical guide sliding plate,
Even if the lubricating oil or the lubricant is insufficient, a good operating condition can be maintained and durability becomes good.

[Brief description of drawings]

FIG. 1 is a side sectional view of a sliding tenter frame according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line BB of FIG.

FIG. 3 is an operation explanatory view in which the rail of FIG. 2 is bent and moved.

FIG. 4 is a side sectional view of a clip base according to an embodiment of the present invention.

5 is a sectional view taken along line CC of FIG.

FIG. 6 is a side sectional view showing a conventional sliding type tenter frame.

FIG. 7 is a plan view of FIG. 6 (a seam of rails).

8 is a sectional view taken along line D-D in FIG. 7.

FIG. 9 is an operation explanatory view in which the rail of FIG. 7 is bent and moved.

10 is a side view of the vertical guide plate taken along the arrow E of FIG. 7. FIG.

[Explanation of symbols]

 1 Film 10 Rail Single Unit 11 Film Travel Side 12 Clip Return Side 13 Clip Base 14 Metal Member 15 Synthetic Resin Injection Molded Product 21 Front Vertical Guide Plate 22 Rear Vertical Guide Plate 23 Bottom Guide Plate 24 Top Guide Plate 29 Tenter Clip

Claims (5)

[Claims] 1. A tenter having a pair of left and right rails endlessly installed from an inlet portion to an outlet portion of a tenter, and a clip base slidably moving on the rail, in which a plurality of rails are connected to each other at a predetermined interval. In a tenter frame including a clip, a flexible long guide plate is provided on a vertical surface facing the front and rear sliding surfaces of the clip base in the rail, and the guide plate connects the joints of adjacent rails. A sliding type tenter, which straddles continuously, is fixed to the rail only on the downstream end side of the tenter, and the other part can slide along the vertical surface of each rail unit. flame. 2. The sliding tenter frame according to claim 1, wherein the flexible long guide plate is made of metal. 3. A plurality of rail units are connected to each other at a predetermined interval, and have a pair of left and right rails installed at end portions from an inlet portion to an outlet portion of the tenter, and a clip base slidably moving on the rails. In a tenter frame including a tenter clip, a guide plate is fixedly provided on a rail surface facing the upper and lower sliding surfaces of the horizontal bottom portion and the upper clip base of the rail unit, and the guide plate is provided at a connecting portion of adjacent rails. The slidable tenter frames are characterized in that their joint seams are obliquely cut, and the cut surfaces are arranged so as to face each other with a certain gap. 4. The sliding tenter frame according to claim 3, wherein the guide plate fixed to the rail surfaces facing the sliding surfaces above and below the clip base is made of metal. 5. A tenter having a pair of left and right rails endlessly installed from an inlet portion to an outlet portion of a tenter, and a clip base slidably moving on the rail, in which a plurality of rails are connected to each other at a predetermined interval. In a tenter frame including a clip, the clip base is a molded product in which a metal member is inserted into a synthetic resin having high heat resistance and wear resistance, and the sliding surface of the clip base is covered with a synthetic resin material. The sliding type tenter frame is characterized in that the chain link portion and the clip body mounting portion of are structured such that the metal members are exposed.