JP6180955B2 - Tenter device - Google Patents

Description

  The present invention relates to a tenter device that grips and moves a web such as a film, fabric, or paper with a clip.

  Conventionally, a plurality of clips that support both ears of the web, a tenter chain that connects the clips, and a tenter rail that runs the clips connected by the tenter chain, and the tenter chain runs on the tenter rail. Has proposed a tenter device for running a web gripped by a clip (see, for example, Patent Documents 1 and 2).

JP-A-5-319648 JP 2010-247393 A

  In the tenter device using the clip as described above, the web is held by the upper holding portion and the lower holding portion of the clip. However, recently, when a film such as an optical film subjected to heat treatment is gripped by a clip, the film may be damaged by the clip. Normally, both ears of the web gripped by the clip are cut off as unnecessary parts even if they are scratched, but when the film is heat-treated, the scratches spread and the film tears or the tension due to the scratches changes. There was a problem of becoming a defective product.

  In view of the above problems, an object of the present invention is to provide a tenter device that prevents a web from being damaged when the web is gripped by a clip.

The present invention includes a pair of left and right endless tenter chains respectively disposed on the left and right sides of the conveyance path of the web for traveling in the front-rear direction, and attached to the tenter chain at predetermined intervals, And a clip having an upper gripping part rotatably arranged with respect to the lower gripping part, an operation lever for rotating the upper gripping part, and the left and right sides of the carry-in entrance of the web, respectively. In the tenter device having an operation device for operating an operation lever, the clip includes a clip main body, a lower grip portion provided in the clip main body, and a pair of left and right support arms provided in the clip main body. A rotating part rotatably provided through a first shaft part between the pair of left and right support arm parts, the operating lever protruding upward from the rotating part, and the rotating part Has a sliding portion provided on the lower surface, the upper grip portion rotatably provided via a second shaft portion in the sliding portion, the operating device is provided along the longitudinal direction An outer guide plate, an inner guide plate provided along the front-rear direction, and a guide path formed between the outer guide plate and the inner guide plate, and the operation lever is disposed in the guide path. The sliding portion rotates about the first shaft portion by moving the upper gripping portion, and the upper gripping portion rotates to stop the second shaft portion by rotating the sliding portion, and the upper gripping portion It is a tenter device that grips the web by a portion and the lower gripping portion.

  According to the tenter device of the present invention, the operation lever of the clip is operated and rotated by moving along the guide path, and the web is slowly gripped by the upper gripping portion and the lower gripping portion, so that the web is not damaged.

It is a perspective view of the clip of one embodiment of the present invention. It is a side view of the clip of a holding state. It is a side view of the clip in a separated state. It is a front view of a clip. It is a top view of a clip. It is a figure which shows the link mechanism of a clip. It is a top view of a tenter device. It is an enlarged plan view of the left entrance side of the tenter device. It is the side view of the operating device seen from the carrying-in entrance side. It is the side view of the operating device and clip seen from the carrying-out side. It is an enlarged plan view of the left operating device. It is a top view of the operating device of the example of a change.

  Hereinafter, a tenter device 100 showing an embodiment of the present invention will be described with reference to FIGS.

(1) Configuration of Tenter Device 100 First, the configuration of the tenter device 100 will be described with reference to FIG. The tenter device 100 of the present embodiment is a clip tenter device.

  In the tenter device 100, a pair of left and right endless tenter chains 106 are wound around a transfer wheel 102 on the carry-in side and a drive wheel 104 on the carry-out side, respectively. A clip 10 is attached to each tenter chain 106 at predetermined intervals. A pair of left and right tenter chains 106 to which the clip 10 is attached run on a pair of left and right tenter rails 108, and a pair of left and right transfer wheels 102 are provided on a tenter base 114 on the carry-in side, and a pair of left and right drive The wheels 104, 104 are provided on a tenter table 115 on the carry-out side. The tenter rail 108 passes through the heat treatment chamber 110 for heat treating the web W.

  The tenter device 100 grips the web W (for example, a film, fabric, paper, etc.) with a certain tension in the width direction by a plurality of clips 10 attached to a pair of left and right tenter chains 106, and the inside of the heat treatment chamber 110 Is passed at a constant conveying speed to heat-treat the web W. Further, operation devices 112 and 112 for operating the operation lever 34 of the clip 10 are provided on both the left and right sides of the carry-in port of the web W, respectively.

(2) Structure of Clip 10 Next, the structure of the clip 10 will be described with reference to FIGS.

  The clip 10 is made of metal and includes a clip body 12, a rotating part 14, an upper gripping part 16, a pair of left and right link parts 18 and 18, and an urging part 20.

  The clip body 12 includes a plate-shaped base 22, a lower grip 24 provided along the front portion of the base 22, and a pair of left and right support legs 26 and 26 erected from the rear end of the base 22. The pair of left and right support leg portions 26, 26 project from the pair of left and right support arm portions 28, 28, respectively. As shown in FIGS. 2 and 3, the clip main body 12 is configured in a U shape by a base 22, support leg portions 26, and support arm portions 28 when viewed from the side.

  The upper surface of the lower grip portion 24 is flat, and this upper surface is a lower grip surface for gripping the web W.

  Between the pair of left and right support arm portions 28, the rotating portion 14 is rotatably attached via a horizontal first shaft portion 30. From the center of the lower surface of the rotating part 14, the swinging part 32 protrudes downward. An operation lever 34 protrudes upward from the center of the upper surface of the rotating portion 14. A pair of left and right bearing portions 36, 36 protrude from the rear surface of the rotating portion 14. The rotating portion 14, the swinging portion 32, the operation lever 34, and the bearing portions 36, 36 are integrally formed.

  A second shaft portion 38 is horizontally attached to the lower end of the swinging portion 32 of the rotating portion 14, and the upper gripping portion 16 is rotatably attached via the second shaft portion 38.

  The upper gripping portion 16 is composed of an upper gripping body 40 for contacting the lower gripping portion 24 and gripping the web W, and a pair of left and right two bearing portions 42, 42 protruding upward from the upper surface of the upper gripping main body 40. Has been. The aforementioned second shaft portion 38 is rotatably attached to the front portion of the two bearing portion 42. The lower surface of the upper grip body 40 is the upper grip surface.

  A third shaft portion 44 is horizontally provided at a position behind the first shaft portion 30 in the support arm portion 28. The fourth shaft portion 46 is horizontally provided at a position behind the second shaft portion 38 in the two bearing portions 42 of the upper gripping portion 16. A plate-like link portion 18 is attached between the third shaft portion 44 and the fourth shaft portion 46.

  An urging portion 20 is attached between the pair of left and right support arm portions 28 and 28 at a position behind the rotating portion 14. The urging portion 20 includes a cylindrical tubular body 50 and a coiled compression spring 52 inserted into the tubular body 50, and a fifth shaft portion 54 is provided at the front end of the tubular body 50. The bearings 36 and 36 of the rotating part 14 are mounted horizontally and rotatably. A pair of left and right cutouts 56, 56 whose rear end portions are open are provided at the rear portion of the cylindrical body 50, and a sixth shaft portion 58 is horizontally arranged along the cutouts 56 so as to be movable. The left and right end portions of the sixth shaft portion 58 are attached to a pair of left and right support arm portions 28 and 28. The coiled compression spring 52 is disposed between the fifth shaft portion 54 and the sixth shaft portion 58 inside the cylindrical body 50, and biased so that the fifth shaft portion 54 and the sixth shaft portion 58 are separated from each other. doing.

(3) Operation State of Clip 10 Next, the operation state of the clip 10 will be described with reference to FIGS. 2, 3, and 6.

  2 shows a state in which the upper gripping portion 16 and the lower gripping portion 24 grip the web W, FIG. 3 shows a state in which the upper gripping portion 16 and the lower gripping portion 24 open the web W, and FIG. Shows a simplified state in which the upper gripping portion 16 and the lower gripping portion 24 grip the web W.

  In the following description, the center of the first shaft portion 30 is the first fulcrum S1, the center of the second shaft portion 38 is the second fulcrum S2, the center of the third shaft portion 44 is the third fulcrum S3, and the fourth shaft portion. The center of 46 is described as the fourth fulcrum S4. Further, “PE” in the drawing indicates a gripping force point located at the rear end portion of the upper gripping portion 16, and “PS” indicates a locking point that is the front end portion of the upper gripping portion 16. Further, in FIG. 3, the locus of movement of the gripping force point PE of the upper gripping part 16 accompanying the rotation of the rotating part 14 is also shown.

  Since the support arm portion 28, the rotating portion 14, the upper gripping portion 16, and the link portion 18 constitute a four-node link, when the operation lever 34 is operated and the rotating portion 14 rotates, the link portion 18 is gripped by the upper grip. The part 16 is rotated around the second fulcrum S2. The upper gripping portion 16 is gripped or separated from the lower gripping portion 24 substantially vertically as indicated by the locus of the gripping force point PE.

  As shown in FIG. 6, in the gripping state of the web W, the second fulcrum S2 is located slightly ahead of the straight line connecting the first fulcrum S1 and the gripping force point PE. The fourth fulcrum S4 is located slightly behind the straight line connecting the third fulcrum S3 and the locking point PS. In this state, a horizontal tension F acts on the web W, pulls the upper gripping portion 16 toward the inner side in the horizontal direction of the fourth fulcrum S4, the upper gripping portion 16 rotates, and the rotating portion 14 Suppose that it acted to rotate to the outside in the horizontal direction. Since the support arm portion 28, the rotating portion 14, the upper gripping portion 16, and the link portion 18 constitute a four-node link as described above, the upper gripping portion is required to rotate the rotating portion 14 outward in the horizontal direction. It is necessary to rotate the part 16 outward in the horizontal direction around the second fulcrum S2. However, since the second fulcrum S2 is positioned in front of the straight line connecting the first fulcrum S1 and the gripping force point PE, in order to rotate the upper gripping portion 16 outward in the horizontal direction, The angle θ1 is increased to move the gripping force point PE away from the first fulcrum S1. That is, the gripping force point PE is pressed against the lower gripping portion 24 by the tension F of the web W, and the frictional force on the web W between the upper gripping portion 16 and the lower gripping portion 24 is increased while preventing the upper gripping portion 16 from rotating. It can be gripped more strongly than the web W.

  Further, the reaction force that the gripping force point PE receives from the lower gripping portion 24 generates a force that rotates the swinging portion 32 of the rotating portion 14 outward in the horizontal direction. However, since the fourth fulcrum S4 is located behind the straight line connecting the third fulcrum S3 and the locking point PS, when the swinging portion 32 is rotated outward in the horizontal direction, the angle θ2 is once set. The locking point PS is pressed against the lower grip 24 by increasing the size. That is, the locking point PS functions as a stopper that determines the horizontal front end of the rotation range of the swinging portion 32. Accordingly, the clip 10 can grip the web W in a state where the gripping force point PE exhibits a sufficient gripping force with respect to the lower gripping portion 24.

  Thus, the web W cannot rotate the swinging portion 32 outward in the horizontal direction by the tension F. However, since the operating lever 34 applies a force directly in the direction in which the rotating unit 14 is rotated, the angle θ2 is temporarily increased so that the first fulcrum S1, the second fulcrum S2, and the gripping force point PE are aligned on a straight line. The upper gripping portion 16 and the lower gripping portion 24 can be separated from each other.

  Further, when the upper gripping portion 16 and the lower gripping portion 24 are in the gripping state, the cylindrical body 50 is positioned below the fifth shaft portion 54 as shown in FIG. The holding state can be maintained by the biasing force of the compression spring 52.

  On the other hand, when the upper gripping portion 16 and the lower gripping portion 24 are in the separated state, the fourth shaft portion 46 of the cylindrical body 50 is positioned above the fifth shaft portion 54 as shown in FIG. The separated state can be maintained by the biasing force of the compression spring 52.

  As described above, when the upper gripping portion 16 of the clip 10 grips the web W, the gripping force point PE moves downward substantially vertically to grip the web W. Therefore, even if both ear portions of the web W are curled inward as shown in FIG. 3, the web W can be reliably gripped without the upper gripping portion 16 coming into contact with the curled portion.

(4) Attachment structure of clip 10 Next, the attachment structure of the clip 10 is demonstrated based on FIG. 8 and FIG.

  The clip body 12 of the clip 10 is fixed to a support base 60 having a U-shaped cross section. A tenter chain 106 is attached inside the support base 60 having a U-shaped cross section. A wheel 62 having a vertical rotation shaft is rotatably provided from the lower part of the support base 60. An L-shaped extending portion 64 is extended from the upper portion of the support base 60 toward the inner horizontal direction. A wheel 66 having a horizontal rotation axis is provided at the end of the extended portion 64. A wheel 68 having a vertical rotation axis is provided at the lower portion of the extending portion 64.

  The tenter chain 106 attached to the support base 60 that supports the clip 10 is driven while being engaged with the outer peripheral surface of the passive wheel 102. Further, the wheel 62 at the lower part of the support base 60 rotates while contacting the lower part of the outer peripheral surface of the passive wheel 102 to support the support base 60. Further, the wheel 66 provided at the end portion of the extending portion 64 rotates in contact with the upper surface edge portion of the passive wheel 102. With the wheels 62 and 66, the support base 60 can stably rotate around the passive wheel 102. The wheel 68 moves along a guide piece (not shown).

  The drive wheel 104 in the vicinity of the carry-out port also moves by engaging the wheel 62, the wheel 66, and the tenter chain 106 of the support base 60 in the same manner as the passive wheel 102.

(5) Operating device 112
Next, the operation device 112 that operates the operation lever 34 of the clip 10 will be described with reference to FIGS.

  As shown in FIGS. 7 and 8, the operating device 112 is attached slightly behind the pair of left and right transfer wheels 102 on the carry-in side.

  The operating device 112 includes an inner guide plate 118 and an outer guide plate 120 provided below a support plate 116 fixed to a fixed shaft for rotating the passive wheel 102 by other motion. The inner guide plate 118 and the outer guide plate 120 are horizontally attached along the front-rear direction, which is the conveyance direction of the web W, and a guide path 122 is formed between the inner guide plate 118 and the outer guide plate 120. . The outer guide plate 120 is fixed at a position slightly higher than the inner guide plate 118. The width of the guide path 122 in the left-right direction is slightly larger than the size of the operation lever 34 in the width direction.

  Reference numerals A, B, and C shown in FIG. 11 correspond to the inclination angles A, B, and C of the operation lever 34 of FIG. That is, in the section A, the operation lever 34 is inclined at the most inclined angle A, and in the section B at the front portion of the outer guide plate 120, the angle is rotating from the inclined state to the upright state, and the rear section. In C, the operating lever 34 is at an upright angle C shown by the solid line in FIG.

  As shown in FIGS. 9 to 10, the inner wall of the guide path 12 (the outer surface of the inner guide plate 118) is tilted in accordance with a trajectory that rotates from the tilted state to the upright state while the operation lever 34 travels. The outer wall of the path 122 (the inner wall of the outer guide plate 120) is also inclined in accordance with the trajectory that the operating lever 34 rotates from the inclined state to the upright state while traveling. That is, the front section B of the outer surface of the inner guide plate 118 is inclined by γ °, and the rear section C is formed vertically. Further, the inner side surfaces of the front section a and the central section b of the outer guide plate 120 are inclined by φ °, and the inner surface of the rear section c is formed vertically. This γ ° coincides with the outward tilt angle of the operation lever 34, and φ ° is set to γ ° <φ ° <90 °.

  As shown in FIG. 11, the planar shape of the guide path 122 is formed in accordance with a trajectory in which the operation lever 34 moves from the inclined state to the upright state while traveling in the front-rear direction. That is, the planar shape of the inner guide plate 118 is such that the section B outside the front part is inclined by α ° with respect to the front-rear direction, and the section C outside the rear part is formed parallel to the front-rear direction. In addition, a section “a” inside the front part of the outer guide plate 120 is formed parallel to the front-rear direction, a section “b” inside the center part is inclined by β ° with respect to the front-rear direction, and a section “c” inside the rear part is formed parallel to the front-rear direction. Has been. The planar shape of the guide path 122 will be described in more detail. The outer guide plate 120 is shorter than the inner guide plate 118 as shown in FIG. This is because the first contact portion of the operation lever 34 is the inner wall 124 of the inner guide plate 118. The section a at the front portion of the outer guide plate 120 is formed up to the middle of the section B at the front portion of the inner guide plate 118, and is inclined from the middle of the section B at the front portion of the inner wall 124 of the inner guide plate 118. Yes. This inclined section b is the central part. The section b at the center of the outer guide plate 120 is parallel to the front-rear direction before the section C at the rear of the inner guide plate 118, thereby forming a rear section c. As a result, the guide path 122 is inclined only at the inner side of the guide path 122 in the section B at the front portion of the inner guide plate 118 and the section a at the front portion of the outer guide plate 120, and thereafter the front portion of the inner guide plate 118. The guide path 122 between the section B and the section b at the center of the outer guide plate 120 is gradually inclined and narrowed on both the inner and outer sides, and finally the section C between the rear portion of the inner guide plate 118 and the outer guide plate 120. A guide path 122 is formed in parallel with the rear section c.

(6) Operating State of Operating Device 112 Next, a state where the operating lever 34 is operated using the operating device 112 will be described based on FIGS. 9 to 11.

  First, in a separated state where the clip 10 is not gripping the web W, the upper gripping portion 16 is separated from the lower gripping portion 24 and the operation lever 34 is inclined toward the inner side of the transport path with the first shaft portion 30 as the center. ing. In a state where the operation lever 34 is inclined, the control lever 34 rotates along the passive wheel 102 and moves in the front-rear direction.

  Next, the inclined operation lever 34 enters the guide path 122 formed between the inner guide plate 118 and the outer guide plate 120 as the clip 10 moves in the front-rear direction. At this time, the outer surface of the inner guide plate 118 is inclined by γ °, and this inclination angle coincides with the inclination angle of the operation lever 34 as shown in FIG. Therefore, the operation lever 34 moves with the clip 10 along the outer surface of the inner guide plate 118. At this time, since the front portion of the inner guide plate 118 is inclined outward at an inclination angle α °, the operation lever 34 is gradually pressed outward by the inner wall of the guide path 122 (the outer surface of the inner guide plate 118). Then, the upper gripping portion 16 is gradually gripped by rotating around the first shaft portion 30. However, even if the operation lever 34 is brought into a completely gripped state by the biasing force of the coiled compression spring 52, the rotation of the operation lever 34 is prevented by the outer wall of the guide path 122 (the inner side surface of the outer guide plate 120). The operation lever 34 rotates only slowly. Such a state is performed from the section A to the section B of the inclined inner wall of the guide path 122 in FIG. When the operation lever 34 passes through the section B, as shown in FIG. 10, the operation lever 34 stands upright along the outer wall of the guide path 122 (the inner surface of the outer guide plate 120), and the upper grip 16 and the lower grip The web W is gripped by the portion 24. However, since the operating lever 34 rotates slowly until the web W is gripped by the upper gripping portion 16 and the lower gripping portion 24, the web W is suddenly gripped by the urging force of the compression spring 52 as in the conventional case. The web W will not be scratched or torn.

(7) Effect According to the present embodiment, the operation lever 34 rotates along with the travel of the clip 10 along the guide path 122 formed between the inner guide plate 118 and the outer guide plate 120. The web W is not suddenly gripped by the lower gripping portion 24, and the web W is not scratched or torn.

  The time for which the operating lever 34 rotates, that is, the force to be gripped can be adjusted by the distance of the section B of the inclined front portion of the inner guide plate 118. The longer the section B, the slower the operating lever 34 rotates. If it is short, it rotates quickly.

  Further, since the inclination angle of the inner side surface of the front part of the inner guide plate 118 and the outer side surface of the front part and the central part of the outer guide plate 120 coincide with the inclination angle of the operation lever 34, the operation lever 34 is smooth. Can be rotated.

  Further, since the width of the guide path 122 in the left-right direction is only slightly larger than the width of the operation lever 34 in the left-right direction, the operation lever 34 does not rotate more than necessary, and the web W is not suddenly gripped.

  Further, since the outer guide plate 120 is fixed at a higher position than the inner guide plate 118, the upper end portion of the rotating operation lever 34 can be reliably held by the side surface of the outer guide plate 120.

(8) Modified Example In the above embodiment, the inner guide plate 118 is provided with the front section B which is an inclined portion only on the front side, that is, on the carry-in entrance side. An inclined section D may be provided as shown in FIG. In this case, the tenter chain 106 of the tenter device 100 is rotated in the reverse direction, and when the clip 10 moves from the carry-out port side to the carry-in port side, the clip 10 is temporarily moved from the non-gripping state to the grasping state, and then is not gripped again. Can be changed. The case where the tenter chain 106 is reversely rotated in this way is, for example, a case where the web W is detached from the clip 10 for some reason.

  Further, the structure of the clip 10 is not limited to the structure of the above-described embodiment as long as it has a structure that can be opened and closed by the operation lever 34, and other structures such as the clips described in Patent Documents 1 and 2. May be.

  Although one embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 10 ... Clip, 16 ... Upper grip part, 24 ... Lower grip part, 34 ... Operation lever, 100 ... Tenter device, 102 ... Passive wheel, 104 ... Drive wheel 106 ... Tenter chain, 108 ... Tenter rail, 112 ... Operating device, 116 ... Support plate, 118 ... Inner guide plate, 120 ... Outer guide plate, 122 ... Guide Road

Claims (8)

A pair of left and right endless tenter chains respectively disposed on the left and right sides of the web conveyance path in order to run the web in the front-rear direction;
A clip attached to the tenter chain at predetermined intervals and having an operation lever;
An operating device for operating the operating lever provided on each of the left and right sides of the web entrance;
In a tenter device having
The clip
The clip body,
A lower grip provided on the clip body;
A pair of left and right support arms provided on the clip body;
A rotating part rotatably provided via a first shaft part between the pair of left and right support arm parts;
The operation lever protruding upward from the rotating portion;
A sliding portion provided on the lower surface of the rotating portion;
An upper grip portion provided rotatably on the sliding portion via a second shaft portion;
Have
The operating device is:
An outer guide plate provided along the front-rear direction;
An inner guide plate provided along the front-rear direction;
A guide path formed between the outer guide plate and the inner guide plate;
Have
When the operation lever moves in the guide path, the sliding portion rotates about the first shaft portion, and when the sliding portion rotates, the upper gripping portion centers on the second shaft portion. And the web is gripped by the upper gripping portion and the lower gripping portion.
Tenter device. The operation lever is in an inclined state when not gripping the web, and rotates from the inclined state to the upright state around the first shaft portion when gripping the web.
The tenter device according to claim 1. The planar shape of the guide path is formed in accordance with a trajectory in which the operating lever moves from the inclined state to the upright state while traveling.
The tenter device according to claim 2. The inner wall of the guide path is inclined according to a trajectory that rotates from the inclined state to the upright state while the operation lever travels.
The tenter device according to claim 2. The outer wall of the guide path is inclined in accordance with a trajectory that rotates from the inclined state to the upright state while the operation lever travels.
The tenter device according to claim 2. The outer guide plate is fixed at a position higher than the inner guide plate;
The tenter device according to claim 2. The width of the guide path is larger than the width in the left-right direction when the operating lever is in the upright state,
The tenter device according to claim 2. The outer guide plate and the inner guide plate are fixed horizontally,
The tenter device according to claim 1.

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