JP3714832B2 - Tension head device of transverse stretching device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tension head device of a transverse stretching device that constitutes a part of a device for manufacturing a plastic film, and in particular, the clip chain can be easily disassembled and assembled by allowing the tension head body to be extruded and rotated. It relates to a new improvement to make it.
[0002]
[Prior art]
Conventionally, in the production of a plastic film, there is a transverse stretching apparatus as an apparatus for producing a stretched film, and a description on the detailed configuration of the transverse stretching apparatus is omitted, but the structure is generally long in the moving direction of the film. It comprises an oven and a traveling device that is disposed on both sides of the oven and that travels and drives a clip chain in which a number of tenter clips are connected in a closed loop. Furthermore, the traveling device includes an extending traveling unit that the clip chain travels while extending the film material along a long oven, and a semicircular reversing unit that reverses the traveling direction of the clip chain at both ends of the oven. , Is composed of. One of the reversing parts, that is, the upstream side is provided with a tension head, and is configured to be pushed by an actuator to apply a predetermined tension to the clip chain and to allow the clip chain to be disassembled and assembled.
[0003]
In the traveling device, as a prior art for disassembling and assembling the clip chain for maintenance and repair of the tenter clip or the chain constituting the clip chain, for example, there is a configuration disclosed in Japanese Patent Application Laid-Open No. 4-27523. In this configuration, the clip chain is disassembled and assembled in the following manner. That is, when disassembling, first, the actuator is loosened to release the tension state of the clip chain. Next, at each end of the tension head, each tenter clip is disassembled and removed from the clip chain, the tension head body of the tension head is pushed out by the actuator, and then the connecting portion between the actuator and the tension head body is separated. Open. As a result, a part of the clip chain located in the tension head body is separated from the traveling device, that is, the extending traveling portion.
[0004]
Further, the tension head body is shaken out together with the turntable that supports the tension head body. Thereafter, most of the clip chain remaining in the traveling device is pulled out from the end of the extending traveling portion, and predetermined maintenance and repair are performed. After the maintenance and repair, the clip chain, that is, the tenter clip and the chain are assembled in the reverse order of the above disassembly.
[0005]
[Problems to be solved by the invention]
Since the tension head device of the conventional transverse stretching device is configured as described above, the following problems exist. That is, in order to pull out most of the clip chain remaining in the extending travel part, it is necessary to pull out the separated tension head body to the outside. As a result, a sufficient space for drawing out is required in the vicinity of the tension head body, and a large site is required as a building for installing the apparatus. Further, a movable support base for swinging and moving the tension head main body and the rotary base is necessary.
[0006]
The present invention has been made to solve the above-described problems, and in particular, does not require extra space, does not require a movable support base, and can easily disassemble and assemble the clip chain. It is an object of the present invention to provide a tension head device for a transverse stretching device.
[0007]
[Means for Solving the Problems]
A tension head device of a transverse stretching device according to the present invention has a tension head body that is formed in a semicircular shape on the outer periphery and is linearly movable by an actuator provided in a pair of traveling devices, and that guides a tenter clip. In the tension head device of the lateral stretching device, the rod of the actuator is inserted into a sleeve provided in the center line portion of the tension head body, and the tension head body rotates and linearly moves through the sleeve and the rod. The actuator is provided in a rail guide of the traveling device, and a pair of shafts provided in the tension head main body are engaged with a pair of shaft holes in the rail guide so that the tension head main body In this configuration, positioning is performed.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of a tension head device of a transverse stretching device according to the present invention will be described in detail with reference to the drawings. 1 is a plan view schematically showing the entire transverse stretching apparatus, FIG. 2 is an enlarged cross-sectional view showing a portion A of FIG. 1, and FIG. 3 is a cross-sectional view showing a configuration of FIG. 4 is a cross-sectional view of the structure shown in FIG. 2 taken along the line CC, FIG. 5 is a view of the structure during normal operation, and FIG. 6 is a view of FIG. FIG. 7 is a block diagram showing a state in the middle of disassembly / assembly.
[0009]
In FIG. 1, what is indicated by reference numeral 10 is a transverse stretching device, and this transverse stretching device 10 is arranged in an oven 20 and first and second expanded and arranged in an eight shape on both sides of the oven 20. It is comprised by the traveling apparatuses 30 and 30A. A tension head 40 is provided on the left side of the traveling devices 30 and 30A, that is, on the upstream end. In addition, a winding device (not shown) is disposed on the downstream side of the transverse stretching device 10, that is, on the right side of the drawing. The plastic film material is stretched in the lateral direction, that is, in the width direction while moving from the left side to the right side in FIG. That is, both sides of the plastic film material are formed by tenter clips 50 described later of the first and second traveling devices 30 and 30A disposed facing the both sides in the oven 20 whose interior is adjusted to a predetermined temperature. Is moved while being mechanically widened in the width direction while being transversely stretched.
[0010]
2 to 4, the first and second traveling devices 30 and 30 </ b> A include a rail guide 31, an actuator 60 provided on the center line of the rail guide 31, and the tension head 40. The rail guide 31 is formed with sleeve holes 32 formed so as to penetrate on the center line, and a pair of shaft holes opened on both sides of the sleeve hole 32 so as to face the tension head body 41 of the tension head 40. 33 is formed. Accordingly, the tension head 40 includes the tension head main body 41 formed in a semicircular shape on the opposite surface side of the rail guide 31, and a sleeve 42 provided on the tension head main body 41 and arranged coaxially with the rail guide 31. A shaft 43 for rotation prevention which is provided in the tension head body 41 and is arranged in parallel to both sides of the sleeve 42 and can be inserted into the shaft hole 33; and a base portion of the sleeve 42 on the center line of the tension head body 41. It is comprised by the press detector 44 provided in this.
[0011]
The actuator 60 includes a mounting cover 63 provided at the rear end of the sleeve hole 32 of the rail guide 31, a pressing device 61 provided in the mounting cover 63 and having a tip reciprocating on the center line, and the pressing device 61. The rod 62 is connected to the tip and inserted into the sleeve 42, and the bearing 64 supports the sleeve 42 and the tension head body 41 in the sleeve hole 32 so as to be able to reciprocate and rotate. On the outer sides of the rail guide 31 and on the outer periphery of the tension head main body 41 forming a semicircular shape, a traveling rail (not shown) is provided continuously in a closed loop shape, and a number of tenter clips 50 are closed looped on the traveling rail. A connected clip chain (not shown) is configured to travel.
[0012]
In the traveling device 30 configured as described above, the sleeve 42 is inserted into the sleeve hole 32 of the rail guide 31 and the rods 62 are pushed out by the pressing device 61 in a state where each shaft 43 is inserted into the shaft hole 33. By urging, the tension head body 41 is pushed forward, and after confirming by the pressure detector 44 that a predetermined tension is applied to the clip chain, the clip chains of the traveling devices 30 on both sides are driven by a drive device (not shown). Can be stretched at the same speed, the plastic film material can be stretched in the width direction.
[0013]
Next, in order to disassemble and assemble the clip chain for maintenance and repair of the tenter clip 50 or the clip chain, first, the tension state of the clip chain is released by pulling the rod 62 of the actuator 60. Next, each tenter clip 50 is disassembled and removed from the clip chain along the rail guides 31 located at both ends of the tension head main body 41, and each shaft 43 is driven by the actuator 60 or human power as shown in FIG. The tension head main body 40 is pushed forward until it completely comes out of the shaft hole 33. Next, the tension head main body 41 is rotated around the sleeve 42 as shown in FIG. 7, and as a result, the tension head main body of each traveling device 30, 30A is changed from the state shown in FIG. A continuous portion, that is, an end portion with 41 is opened, and a work space is secured.
[0014]
Thereafter, most of the clip chain remaining in the traveling device 30 is pulled out, and predetermined maintenance and repair are performed on the tenter clip 50 and the chain. The tenter clip 50 and the chain that have undergone maintenance and repair are assembled in the reverse order of the above disassembly.
[0015]
【The invention's effect】
Since the tension head device of the transverse stretching device according to the present invention is configured as described above, the following effects can be obtained. That is, since the tension head body of the tension head can be freely moved in and out of the rail guide by the actuator and can be rotated, no extra space for moving the tension head base is required in disassembling and assembling the tension head base. It became possible to work in a small space.
Further, a movable support base for moving the tension head base is not required.
Furthermore, the steps of disassembling and assembling the tension head base are reduced and simplified, and the work can be performed more easily and more easily.
[Brief description of the drawings]
FIG. 1 is a plan view schematically showing the entire transverse stretching apparatus.
FIG. 2 is an enlarged cross-sectional view showing a portion A of FIG.
FIG. 3 is a structural cross-sectional view taken along the line BB in FIG. 2;
4 is a structural cross-sectional view taken along the line CC in FIG. 2. FIG.
FIG. 5 is a side view of FIG. 3;
6 is a perspective view of a portion A in FIG. 1 showing a state during the disassembly / assembly of the tension head device in FIG. 2;
7 is a side view showing a state in which the tension head main body of FIG. 5 is rotated. FIG.
[Explanation of symbols]
30, 30A First and second traveling devices 31 Rail guide 33 Shaft hole 40 Tension head 41 Tension head main body 42 Sleeve 43 Shaft 50 Tenter clip 60 Actuator 61 Press device 62 Rod 64 Bearing

Claims (2)

A tension head main body (41) configured to guide a tenter clip (50), the outer periphery of which is formed in a semicircular shape and is linearly movable by an actuator (60) provided in a pair of traveling devices (30, 30A). In the tension head device of the transverse stretching apparatus having the rod (62) of the actuator (60) is inserted into a sleeve (42) provided at the center line portion of the tension head body (41), the tension head body ( 41) is a tension head device for a transverse stretching device, wherein the tension head device is configured to rotate and linearly move through the sleeve (42) and the rod (62). The actuator (60) is provided on a rail guide (31) of the traveling device (30, 30A), and a pair of shafts (43) provided on the tension head body (41) is a pair of the rail guide (31). The tension head device of the transverse stretching device according to claim 1, wherein the tension head main body (41) is positioned by being engaged with the shaft hole (33).

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