KR0144766B1 - Clip chain for stretching - Google Patents

Abstract

[purpose]

The present invention provides a drawing clip chain that prevents oil from scattering and does not form an oil film on the film surface.

[Configuration]

It has the clip part 5 holding the plastic film F, and it runs in an endless shape. A plurality of roller links, which are fitted into the rail and which are capable of traveling along the rail, are arranged alternately with the plurality of pin links 2 having a substantially c-shape, and the pin links 2 so as to connect the pin links 2 ( 3) is provided. A sliding member 14 formed of heat-resistant abrasion-resistant plastic is attached to the rail facing surface of the rail facing surface portion 2 of the pin link 2.

Description

Stretch Clip Chain

1 is a front view of an essential part illustrating an embodiment of the present invention,

2 is a plan view of the main part,

3 is a side view of the main part,

4 is a simplified plan view,

5 is a cross-sectional view of the rail,

6 is a front view of an essential part of another embodiment;

7 is a plan view of the main portion of the pin link of another embodiment,

8 is a side view of an essential part of another embodiment;

9 is a front view of an essential part of another embodiment,

10 is a plan view of an essential part of another embodiment,

11 is a side view of an essential part of another embodiment;

12 is a partially broken side view illustrating a separate embodiment in place of FIG.

13 is a partially broken plan view thereof.

* Explanation of symbols for main parts of the drawings

2: Pin Link 3: Rolo Link

4: Rail 5: clip part

14: Sliding member 17: Screw member

18: fitting 36: rivet member

F: Plastic Film

[Industrial use]

The present invention relates to a drawing clip chain.

[Prior art]

In general, when manufacturing a plastic film, the film was pulled in the width direction while running in the longitudinal direction, and the width dimension was enlarged to a predetermined width.

In this case, the plastic side film is held in a pair of stretching clip chains on its opposite side, and is stretched in the width direction with the running of the clip chains.

Since the drawing clip chain runs along a rail made of a small alloy, Fe, or the like, it is necessary to supply lubricating oil between the rail and the chain in order to smoothly travel.

[Problems that the invention tries to solve]

Therefore, in the past, it is necessary to supply a large amount of lubricating oil, and when lubricating oil is supplied more than necessary, oil is scattered or oil smoke of vaporized oil forms a film (oil film) on the film surface.

Therefore, an object of the present invention is to provide a drawing clip chain for lubricating oil which can be made extremely low as compared with the prior art, thereby preventing oil from scattering and forming an oil film on the film surface. .

[Means for solving the problem]

In order to achieve the above object, the stretching clip chain according to the present invention is a stretching clip chain which has a clip portion holding a plastic film and runs in an endless shape, which fits on a rail and runs along this rail. And a plurality of pin links having a U-shape and a plurality of roller links arranged alternately with the pin links and connected to the pin links in a cross section in which the clip part is attached, and the rail facing surface portion of the pin links. The sliding member is formed of heat-resistant wear-resistant plastic.

Moreover, the Rockwell hardness of the sliding member is provided.

It is also preferable that the rockwell hardness of the sliding member is set to 30 or more on an M scale, and the sliding member is freely formed by injection molding integrally with the metal pin link or attached to the pin link via an attachment hole.

It is also possible that the attachment port is a screw member freely screwed onto the pin link or a rivet member that can be removed by countersink processing.

[Action]

Since the sliding member made of heat-resistant abrasion-resistant plastic is attached to the rail facing surface portion of the pin link, the sliding member slides with respect to the rail when the chain travels the rail, and the chain can travel smoothly on the rail. This makes it possible to reduce the supply of lubricating oil.

In addition, the sliding member is excellent in heat resistance and is not damaged by heat.

Moreover, the sliding member is particularly excellent in hardness and excellent in durability as long as the Rockwell hardness becomes 30 or more on the M scale.

In addition, when the sliding member is integrally formed with the pin link by injection molding, there is no work for attaching the inoculation member to the ping link, and it is not separated during the chain running or the like.

When the sliding member is attached to the pin link by an attachment hole consisting of a screw member screwed to the pin link, the sliding member can be removed from the pin link by removing the screw by retracting the screw. In addition, when the sliding member is made of a rivet member, there is no need to provide a screw life on the pin link side, and the whole processing is easy.

EXAMPLE

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail based on drawing which illustrates an Example.

1, 2 and 3 show the main parts of the arithmetic clip chain according to the present invention, the chain 1 comprising a plurality of pin links 2 having a substantially c-shaped cross section and the pin links 2. And a roller link 3 arranged alternately with each other, and travel in an endless shape as shown in FIG. 4 along the rail 4 (see FIG. 5).

By the way, as shown in FIG. 4, this extending | stretching clip chain 1 is arrange | positioned symmetrically by interposing the center line L, and the stretching machine M is comprised. In this case, the first range Z ₁ in which the size of the chain sign is small is small, and the second range Z ₂ and the chain in which the size between the chains is large from the upstream side to the downstream side. the range is divided into three ₍₃ Z) which, as the dimension between.

Each of the chains 1 and 1 is provided with a plurality of clips 5 shown in Figs. 1, 2, 3, and the like on the sides facing each other, and the clips 5 are plastic films. Holding the side end of (F), each of the chains 1 and 1 travels along the rail 4 in an inoperative state. As a result, the plastic film F is stretched in the width direction thereof. In addition, as a plastic film (F), it is a polypropylene film, for example.

By the way, as shown in FIG. 5, the rail 4 is provided with the leg body 7 which has the upper endless recessed recess 6, and is attached to the bottom surface and side surface of the recessed groove 6. As shown in FIG. The receiving plates 8 and 9 and the guide plates 10 arranged in the recessed groove 6 are provided. In addition, the resin body 7 and the chain receiving plates 8 and 9 are made of hardened steel or the like, and the guide plate 10 is made of a phenol resin or the like.

And, as shown in Figure 5, the pin link (2) is provided with a vertical wall (13) connecting the upper ends of the upper wall (11), the lower wall (12) and the upper and lower end walls (11, 12), Sliding members 14 and 14 made of heat-resistant abrasion resistant plastics are attached to the rail facing surface.

Specifically, in this case, as shown in FIG. 1, the rail facing surface portion includes the outer surface 13a of the vertical wall 13, the lower surface 12a to the leading edge 12b of the lower wall 12, and the like. That is, as the sliding member 14, a sliding member 14 of (a) having a portion of the outer surface 13a of the vertical wall 13 to the base end side of the lower surface 12a of the lower wall 12 in a cover shape and (B) There is a sliding member 14 of (b) which forms a part from the front end side of the lower surface 12a of the lower wall 12 to the leading edge 12b.

(A) The sliding member 14 has an L-shaped cross section consisting of the vertical wall 15 and the horizontal wall 16, and is connected to the vertical wall 13 and the lower wall 12 of the pin link 2 from the outside. As the attachment orifice 18 which consists of the screw member 17 which is screwed freely screwed, attachment and detachment are attached to the pin link 2 freely. In this case, the screw member 17 is, for example, a hexagon socket head plate bolt.

(B) The sliding member 14 is made of a rectangular flat plate body having two cutouts 19 and 19 on the upper surface 21 as shown in FIG. ), Protrusions 20 and 20 of the lower wall 12 of the pin link 2 are fitted.

Therefore, the tip edge 12b of the lower wall 12 is thus the tip edge of the protrusion pieces 20 and 20. Then, as shown in FIG. 1, fittings 18 and 18 comprising screw members 17 freely threaded to the protrusions 20 and 20 of the lower wall 12 of the pin link 2. 2) The sliding member 14 of this (b) is attached to the pin link 2 freely.

In addition, the upper surface 21 of the sliding member 14 of (b) is positioned higher than the inner surface 12d of the lower wall 12 of the pin link 2, and each head of the screw member 17 is respectively. The outer surfaces of the sliding members 14, 14, i.e., are slightly retracted from the sliding surface.

Accordingly, when the pin link 2 with the sliding member 14 is fitted to the rail 4, the chain receiving plate 8 of the sliding member 14 as shown in FIG. The outer surface of the vertical wall 15 abuts, and the chain receiving plate 9 has an outer surface of the horizontal wall 16 of the sliding member 14 of (a) and a lower surface of the sliding member 14 of (b). (22) abuts, and the upper surface 21 of the sliding member 14 of (b) abuts on the guide plate 10. In other words, when the pin link 2 travels, the sliding members 14 and 14 slide with respect to the rail 4.

By the way, as the sliding member 14, it is preferable to become 30 or more in Rockwell hardness M scale, and the plastic of ①② of Table 1 is used specifically ,.

In addition, ① is specifically thermoplastic resin VICTREX PEEK 450CA30 (brand name of Sumitomo Chemical Co., Ltd.), and ② is thermosetting resin B0009 (brand name of Starlight Industry Co., Ltd.).

As shown in FIG. 1 and the like, the roller link 3 includes a pair of upper and lower plates 23 and 23, bushes 24 and 24 connecting the ends of the plates 23 and 23, and Pin links (2, 2) having rollers (25, 25) fitted to the bush (24, 24) and positioned close to each other through connecting pins (26, 26) inserted into each bush (24, 24) Are connected to each other. In addition, cylindrical bodies 27 are fitted in the bushes 24 and 24.

That is, two holding holes arranged on the upper and lower walls 11 and 12 of the pin link 2 are arranged at predetermined pitches in the longitudinal direction, respectively, and the upper and lower sides of one pin link 2 (other pins) are opposed to each other. Ends of one connecting pin 26 of the roller link 3 are respectively fitted into the holding holes on the two sides of the link, and the upper and lower (one pin link biaxial) holding holes of the other pin links 2 are opposed to each other. On the other end, the other end of the connecting pin 26 of the roller link 3 is fitted.

Therefore, the chain 1 is arranged in an endless manner in which the pin links 2 and the roller links 3 are alternately arranged.

Next, the clip part 5 is provided in the upper wall 11 of the pin link 2, and is provided in the receiving plate 29 provided in the lower part 28a of the arm 28, and the arm 28 at the tip part. The rocking body 30 which rocking | fluctuation was carried out freely through the holding shaft, and the gripping click 31 provided in the front-end | tip of this rocking body 30 are provided.

In addition, the rocking member 30 has its proximal end 30a always pulled by an elastic member, not shown in the figure, as shown by arrow A, and the grip click 31 at the tip is pressed against the upper surface of the receiving plate 29. .

Then, when the base end portion 30a of the swinging body 30 is pressed in the direction of the arrow B in response to the elastic force of the above-described ballistic member, the grip click 31 swings like the arrow C. And spaced apart from the receiving plate 29.

Accordingly, in the state where the gripping click 31 is separated from the receiving plate 29, the side end edge of the film F is sandwiched between the gripping click 31 and the receiving plate 29, and the swinging body ( When the pressing force in the direction of the arrow B of the guarded portion 30a of 30 is released, the grip click 31 swings in the direction of the arrow D by the elastic force of the elastic member, not shown, and the film F The side edges of the can be sandwiched between the gripping click 31 and the receiving plate 29.

By the way, on the lower surface of the lower portion 28a of the arm 28, the sliding member 33 made of the same heat-resistant abrasion-resistant plastic as the sliding member 14 described above is attached to the attachment hole 18 formed of the screw member 17. Desorption is attached freely. In the rail 4 shown in FIG. 5, the receiving part 34 which receives the lower part 28a of the arm 28 is provided, and when the chain 1 runs to this receiving part 34, This is because the sliding member 33 of the lower portion 28a is sliding.

Next, the method of extending | stretching a film with the drawing machine using the drawing clip chain comprised as mentioned above is demonstrated.

First, on the downstream side, that is, in the first range Z and Z, the clip portions 5 of the chains 1 and 1 facing each other are held to hold the side edges of the film F, and the respective chains 1 And 1) are run as shown by the arrows, respectively, as shown in FIG. With this running, the film F is sequentially enlarged in the width direction to the second range Z and Z, and is set to a constant width in the third range Z and Z, and the film F is the third film. Emitted from the ranges Z and Z.

When the chains 1 and 1 run on the rail 4, the sliding member 14 slides with respect to the rail 4, so that it can run smoothly. According to this, the lubricating oil supply amount becomes 1/3-1/5 compared with the conventional thing which does not have the sliding member 14. As shown in FIG. In addition, the amount of oil supply decreases and the scattering of oil can be effectively prevented.

Next, FIG. 6 illustrates another embodiment, in which case the pin link 2 has a projection 35 in its substantially large shape in plan view as shown in FIG. 7 on its upper wall 11, (B) The sliding member 14 is attached to this protrusion part 35. As shown in FIG.

Moreover, the sliding member 14 of (d) is attached to the outer surface 13a of the vertical wall 13 of the pin link 2 to the lower surface 12a of the lower wall 12. That is, the sliding member 14 of (d) becomes L-shaped in cross section, and its vertical wall counterpart 14a is attached to the vertical wall 13, and its lower wall counterpart 14b is attached to the lower wall 12. It is.

By the way, the attachment hole 18 of the sliding member 14 of (c) is the screw member 17 formed with the hexagonal hole plate bolt, as shown in FIG. 7, and the protrusion part 35 of the upper wall 11 is shown. Screw retraction is freely attached to the screw hole provided in the).

In addition, the attachment hole 18 to which the sliding member 14 of (d) is attached is a rivet member 36 as shown in FIG. 7 and FIG. 8, and is provided on the vertical wall 13 and the lower wall 12. FIG. It is inserted and caulked into the through-hole 37 provided through.

Specifically, the sliding member 14 in (d) is provided with a hole portion 38... Corresponding to the through hole 37... And a large diameter portion of the hole portion 38 of the rivet member 36. The head portion 36a is fitted, the shaft portion 36b of the rivet member 36 is inserted into the small diameter portion or the through hole 37 of the hole portion 38, and protrudes from the through hole 37 therein. The protrusion is crushed.

Therefore, when the countersink process is applied to the head portion 36a of the rivet member 36, the rivet member 36 can be pulled out inward, which causes the sliding member 14 of this (D) to be pin-linked. Can be removed from (2).

In addition, as shown in the embodiment shown in FIG. 1, the clip portion 5 includes a swinging body 30 which is pivotably attached to an arm 40 which is provided successively from the pin link 2, and the swinging body ( A gripping click 31 provided at the tip of 30 and a receiving plate 29 receiving the gripping click 31 are provided.

Therefore, also in this chain 1, the film F can be grasped by the clip part 5, Moreover, when it is fitted to the rail 4 and runs along this rail 4 (c), ( D) angle

The sliding members 14 and 14 slide with respect to the rail 4, and can run smoothly. In other words, the chain 1 is most suitable for a rail having an upper guide portion in which the sliding member 14 of (C) slides.

Next, FIGS. 9, 10 and 11 again illustrate another embodiment, in which case the sliding member 14 is attached to the upper end of the sliding member 14 and vertical wall 13 of (C). (E) a sliding member 14, and a sliding member 14 of (bar) attached to the lower end portion to the lower wall 12 of the vertical wall (13).

(E) The sliding member 14 is formed of a rectangular flat plate body, and is an attachment hole 18 formed of the screw member 17 of the hexagonal hole plate bolt used in the chain 1 of FIG. Desorption is freely attached to the upper end of the vertical wall (13).

The sliding member 14 of (bar) becomes L-shaped in cross section, the short side portion 14c of which is the attachment port 18, and the long side portion 14d of which the lower side of the vertical wall 13 is attached to the attachment hole 18. Detachment is freely attached to the lower wall 12.

In other words, in this embodiment, it is necessary to form the screw lifespan on the vertical wall 13 and the lower wall 12 of the pin link 2, unlike the chain shown in FIG.

And also in the chain 91 shown to FIG. 9-FIG. 11, it can run smoothly along the rail 4. As shown in FIG.

12 and 13 illustrate another embodiment, in which case the sliding member 14 is injection molded and integral with the metal pin link 2. 12 and 13, a through hole 41 is formed in the metal pin link 2 so that resin penetrates and fills the through hole 41 during injection molding of the resin. The link 2 is firmly integrated.

Therefore, the operation of attaching the separate sliding member 14 to the pin link 2 through the attachment hole 18 becomes unnecessary, and the assembly workability is excellent, and further, the number of parts can be reduced.

In addition, in the chain 1 shown in FIG. 1, all hexagonal countersunk bolts are used as the attachment holes 18, but the attachment holes 18 formed by the rivet member 36 in part or all thereof are used. You may. If the rivet member 36 is used, there is no need to form a screw hole.

Moreover, in the chain 1 shown in FIG. 6, even if the sliding member 14 of (C) is attached by the fitting opening 18 formed by the rivet member 36, the sliding member (D) of (D) is attached. 14) may be attached by an attachment hole 18 formed by a screw member of a hexagon socket plate bolt. Also in the chain shown in FIG. 9, the sliding members 14 of (c), (e) and (bar) may be attached by the attachment holes 18 formed of the rivet members 36. As shown in FIG.

[Effects of the Invention]

Since this invention is comprised as mentioned above, the following effects are exhibited.

(1) When the drawing club chain travels on the rail 4, the sliding member 14 slides with respect to the rail 4, so that the chain can travel smoothly on the rail 4, The amount of lubricating oil can be reduced (conventional 1/3 to 1/5) as compared with the prior art, and oil can be effectively prevented from scattering. In addition, since there is no remaining oil, the oil does not vaporize to form an oil film on the surface of the film, and the quality of the product of the formed film F is not deteriorated.

② The sliding member 14 is excellent in durability, and this chain can stably run on the rail 4 over a long period of time. In particular, if the Rockwell hardness is 30 or more on the M scale, durability is superior to the sliding member 14.

(3) If the sliding member 14 is integrally formed with the pin link 2, the attachment work of the sliding member through the fitting hole can be omitted, the number of parts can be reduced, and the assembly work can be simplified. Moreover, there is no fear that the sliding member may come off from the pin link 2.

(4) If the attachment hole 18 is a screw member freely screwed onto the pin link 2, the attachment hole 18 can be attached and detached and the sliding member 14 is damaged. (14) can be exchanged.

(5) If the attachment port 18 is a rivet member, the stable state can attach the sliding member 14 to the pin link 2, and furthermore, it is not necessary to form a screw hole in the pin link 2, Processing of 2) becomes easy. In the case where the sliding member 14 is damaged or the like, the sliding member 14 can be replaced.

Claims (6)

In the stretching clip chain having a clip portion 5 for holding the plastic film F and running in an endless shape, it is fitted to the rail 4 and can travel along the rail. A plurality of pin links 2 having a substantially c-shaped cross section in which the section 5 is placed are alternately arranged with the pin links 2, and the plurality of roller links 3 connecting the pin links 2 with each other. And a sliding member (14) formed of heat-resistant abrasion-resistant plastic on the rail facing surface of the pin link (2). The drawing clip chain according to claim 1, wherein the sliding member (14) is set to 30 or more on a Rockwell hardness M scale. The drawing clip body according to claim 1, wherein the sliding member (14) is integrally molded with the metal pin link (2) by injection molding. The drawing clip chain according to claim 1, wherein the sliding member (14) is attached to the pin link (2) through an attachment hole (18). 5. The drawing clip body according to claim 4, wherein the attachment port (18) is a screw member (17) freely threaded to the pin link (2). 5. The drawing clip chain according to claim 4, wherein the attachment hole (18) is a rivet member (36) in which the countersink is removable by processing.