JP3014374B1 - Web storage device - Google Patents

Abstract

Abstract: A web W storage unit, an introduction unit that introduces a web into the storage unit, and a take-up unit that takes out the web stored in the storage unit from a downstream side. In the web accumulating device, the web W to be accumulated is aligned and accumulated so that little tension is applied, thereby preventing breakage, wrinkles and meandering even with a material weak in tension such as a nonwoven fabric. SOLUTION: A plurality of support members 22 for supporting a middle part in the longitudinal direction of the web W from below at predetermined intervals in the longitudinal direction,
Transfer means 23 for transferring each support member 22 along a predetermined endless track, and a plurality of support members 22 located on the outward path from the introduction section 12 side to the take-up section 13 are horizontally aligned and positioned on the outward path. Adjacent supporting member 22
Are spaced apart from each other at a predetermined length in the longitudinal direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a web accumulating apparatus suitable for temporarily stocking webs in the middle of a continuous processing line for webs (strands) which are weak in tensile force such as nonwoven fabrics.

[0002]

2. Description of the Related Art In the production of web-like products such as long sheets and long films, intermittent nonwoven fabrics are continuously formed while a web fed from a raw roll (web roll) is transported in a longitudinal direction. It is performed by performing processing.

[0003] Generally, since the length per roll is shorter than the length required for a web-like product, required processing is performed while sequentially connecting a plurality of webs. Conventionally, in order to be able to perform connection work between webs without stopping, a storage device for stocking webs in the middle of the line for a length equivalent to the time required to connect the webs has been conventionally used. Used.

FIG. 5 shows an example of such a conventional web storage device. Such conventional storage devices are:
A fixed roll base 5 in which a plurality of rolls 51 are vertically arranged.
2 and a moving roll base 54 in which a plurality of rolls 53 are arranged in a vertical direction. The moving roll base 54 reciprocates on a rail 56 by the driving of a moving motor 55, and moves relative to the fixed roll base 52. It is configured to be able to approach and leave.

[0005] The conventional storage device is provided in the middle of a production line, and feeds a web W supplied from the line from a roll 51 of a fixed roll base 52 and a moving roll base 54 from above.
The web W is stocked between the movable roll base 54 and the fixed roll base 52 while alternately wrapping the web W with a constant tension in the longitudinal direction. In addition, the length of the web W stocked in the conventional apparatus is reduced by moving the movable roll table 54 close to the fixed roll table 52, and the length of the movable roll table 5 is reduced.
4 is separated from the fixed roll base 52 to increase the number.

[0006] As another simple conventional storage device, as shown in FIG. 6, a storage container 61 for stocking webs W in an irregular state, and a web W in the storage container 61 is provided.
An introduction roll for introducing the, there is provided with a take-up roll to take over a stock web W in the storage vessel 61 from the downstream side. The introduction roll and the take-up roll are driven by drive motors 64 and 65, respectively.

[0007]

In the former conventional apparatus, the web W is stocked while applying a tension in the longitudinal direction to the web W, but is used for a web forming line of a material weak in tensile force such as a nonwoven fabric. In such a case, even if the tensile force acting on the web is slight, there is a problem that the thickness of the web becomes unevenly thin, and the web is liable to be cut off at a halfway portion 62 in the longitudinal direction.

Further, according to the second conventional storage device, since the web W is irregularly stocked in the storage container 61, when the take-out roll removes the web W from the storage container 61, wrinkles are formed on the web W. As a result, the web W tends to meander.

Due to these problems, at present, any conventional apparatus can stock only an insufficient length when used for a web that is weak in tension.

Therefore, the present invention provides a structure in which even a material having a very low tensile force, such as a nonwoven fabric, has a structure in which tension is not substantially applied to the web while being regularly arranged and accumulated, and a sufficient stock amount is obtained. The purpose is to be able to secure.

[0011]

In order to achieve the above object, the present invention takes the following technical measures.

That is, the present invention provides a web storage apparatus comprising a web storage section, a web introduction section for introducing the web into the storage section, and a web take-up section for removing the web stored in the storage section from the downstream side. In the apparatus, the accumulating section includes a plurality of supporting members that support the intermediate portion in the longitudinal direction of the web from below at predetermined intervals in the longitudinal direction, a forward path from the web introduction section side to the web taking-up section side, and a web from the web taking-up section side. Transport means for transporting each support member along an endless path including a return path toward the introduction section side, wherein the plurality of support members located on the outward path are horizontally aligned and adjacent to each other on the outward path. the support member is close at intervals in the longitudinal direction by a predetermined length of the portion of the web is suspended, the transfer
The transmission means is an upstream sprocket installed on the web introduction side.
And the downstream sprocket installed on the web take-up section side.
Endlessly wound between these sprockets
Chain and each chain link of the chain
Arm, the arm being outside the endless chain.
It extends in the circumferential direction, and a support member is attached to the arm
Are introduced from the web introduction section,
A support located at the end of the return path on the lower side of the hanging web
While moving the members while spreading them radially,
The support member supports a halfway portion of the web in the longitudinal direction.
Is transported toward the beginning of the outward path .

The apparatus according to the present invention is disposed in the middle of the web processing line, and folds the top of the folded web in a state in which the web introduced from the web introduction section is folded in the longitudinal direction in multiple folds. By successively supporting the portion with a plurality of support members located on the outward path, a web of a required length can be regularly stocked such that a portion of a predetermined length in the longitudinal direction of the web hangs between the support members. According to the present invention, the supporting state of the web is such that the web is supported by the supporting member from below, and the web is hung on the supporting member. Does not work. Also, when the stocked web is taken out from the web take-up portion, the portion suspended between the adjacent support members is taken out sequentially, so that almost no tension acts on the web.

Therefore, even if the web is weak in tension, even if the number of support members is increased so that a sufficient length of web can be stocked, the thickness of the web becomes thin or the web breaks in the middle. Rarely
Also, since the stock is regular, there is almost no wrinkling or meandering of the web.

Further, by circulating and transferring the plurality of support members by the transfer means, the web introduced from the web introduction portion can be successively supported by the support members, and the hanging portion of the web is taken off by the web take-up portion. The supported members are sequentially shifted to the return path. This allows continuous accumulation of the hanging web,
The support member that shifts to the return path can be positioned below the web accumulated in a hanging manner, and the accumulation operation can be performed smoothly.

The transfer means transfers the support member located at the end of the return path radially to the lower surface side of the web which is sequentially introduced from the web introduction portion and hangs down by its own weight while transferring the support member radially. configured to transfer toward the support member so as to support the forward starting the
I do. By configuring the transfer means in this manner, the structure of the web introduction section is simplified, and the web to be introduced is simply suspended from the introduction section, and the web is transferred onto the support member sequentially transferred from the return path to the outward path. , And a web portion of a predetermined length can hang down between the supporting member and the preceding supporting member in a folded state.

[0017] Such transfer means, an upstream sprocket disposed web blanking inlet side, and a downstream sprocket disposed on the web take-up side, the endless chain wound around between sprockets , And an arm connected to each chain link of the chain.
It is assumed that the arm extends in the outer peripheral direction of the endless chain, and a support member is attached to the arm.

According to this configuration, the distance between the adjacent support members (that is, the support members located on the outward path or the return path) attached to the chain link of the linear portion of the endless chain between the two sprockets via the arm is: Inevitably, it is almost equal to the distance between the chain links, but the distance before and after the support member attached to the part wound around the sprocket via the arm is widened by the amount radially extended by the arm in the outer peripheral direction. . Therefore, the support member in the process of sequentially supporting the web introduced from the web introduction portion is separated from the front and rear support members, and while ensuring a certain amount of droop from the support member, Smooth operation can be performed. In addition, the return path is positioned greatly downward by the length of the arm, so that the web can be greatly folded while miniaturizing the endless chain.

It is preferable that a pair of the left and right arms is provided, and a support member is provided between the left and right arms to secure the mounting strength and operational stability of the support member . In this case, it is preferable that the interval between the left and right arms is made larger than the left and right width of the web so that the arms are positioned on the left and right sides of the web so that the transfer of the web by the arms is not hindered.

Further, by providing a pressing member for pressing the web supported by the support member from the end of the return path to the start end of the forward path between the support member and the support member, the web is hung down on the support member during the first web support process on the outward path. It is possible to prevent the web being slid on the support member due to the difference in the weight of the web hanging from the front side of the supporting member and the weight of the web hanging from the rear side of the supporting member. Therefore, by providing such a pressing member, the amount of hanging of the web from the support member located on the outward path can be made constant.

Furthermore, by synchronizing the amount of web introduction by the web introduction unit with the operation of the transfer means, a web of a fixed length can always be hung between adjacent support members. In particular, the transfer means includes an intermittent drive means for intermittently transferring the plurality of support members by one pitch of the alignment interval, and the transfer means has a predetermined length of the web suspended from the web introduction portion. By configuring to operate when it is, a certain amount of web is more reliably hung between adjacent support members.

If the support member is constituted by a round shaft extending over the entire length in the width direction of the web and is rotatable around its axis,
The web can be supported on a curved surface to prevent the web from being scratched or creased.In addition, when the web is taken from the web take-up section, the resistance between the web and the support member is reduced to ensure a smooth take-up operation. obtain.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A web accumulating apparatus 4 according to an embodiment of the present invention is used for forming a sheet or a sheet using a nonwoven fabric as a material, and stores a raw material web W (long sheet material). It is for temporarily stocking online. As shown in FIGS.
0 and a web storage unit 11 provided in the frame 10
And a web introduction unit 12 for introducing the web W into the storage unit 11
And a web take-up unit 13 for taking up the web W stored in the storage unit 11 from the downstream side. The introduction unit 12 is disposed upstream of the web W transfer line, and the take-off unit 13 is disposed downstream. The introduction unit 12 intermittently introduces the raw material web W supplied from the web splicing device. The web W stored in the storage unit 11 is taken out at a constant speed and supplied to the processing unit .

The introduction section 12 includes a guide roller 14 for guiding the raw material web W to an upper portion of the frame 10.
The roller 14 is rotatably supported by a bracket 15 projecting upstream from the frame 10.

The introduction section 12 includes a feed roller 16 disposed downstream of the guide roller 14 and the feed roller 1.
And a pinch roller 17 for pressing the web W wound around 6 against the feed roller 16 to prevent slippage. The feed roller 16 is rotatably supported on an upper portion of the frame 10, and the web W is rotated by a web supply motor 18 (rotation driving means) attached to the frame 10 via a chain 19 (power transmission means). It is driven so as to sequentially send out downward. This operation of motor 18, (not shown) suitable control device, the web
The web W is stopped during the splicing operation of the web W by the splicing device, and the motor 18 is controlled to be driven when the splicing is completed. The rotation speed of the motor 18 is
The speed of the web W sent downward by the feed roller 16 is set to be higher than the line speed.

The pinch roller 17 is mounted on the frame 10 so as to be openable and closable by the operation of the air cylinder 20. At the start of the line, the pinch roller 17 is separated from the feed roller 16 to move the end of the web W to the feed roller 16
Then, the air cylinder 20 is operated to press the pinch roller 17 against the feed roller 16. A pneumatic regulator 21 for adjusting the operating pressure of the air cylinder 20 is provided at a lower portion of the frame 10.

The accumulating section 11 includes a plurality of support members 22 for supporting the intermediate portion of the web W in the longitudinal direction at predetermined intervals in the longitudinal direction from below, and each support member 2 along a predetermined endless track.
And transfer means 23 for sequentially transferring the two. In the present embodiment, the predetermined endless track is a straight forward path from the introduction section 12 to the take-up section 13 side, and a linear forward path from the take-up section 13 to the introduction section 12 side located below the forward path. It includes a return path, a semicircular evacuation path that circulates from the end of the outward path toward the beginning of the return path, and a semicircular return path that circulates from the end of the return path toward the start of the outward path.

The transfer means 23 includes a pair of left and right upstream sprockets 24 disposed on the introduction section 12 side and a pair of left and right downstream sprockets 25 disposed on the take-up section 13 side.
A pair of left and right endless chains 26 wound between the sprockets 24 and 25 and rotating vertically, arms 28 connected to each chain link 27 constituting the chain 26, and rotating the downstream sprocket 25. And a driving means 29 for driving. The driving means 29
May be configured to rotationally drive the upstream sprocket 24.

The drive means 29 includes a step servo motor 30 (intermittent drive means) installed at the lower part of the frame 10, and the motor 30 is linked to the downstream sprocket 25 via a counter shaft 31. The motor 30
It is configured to be rotationally driven by a predetermined angle in response to a drive instruction signal from a drive control unit (not shown), and to intermittently transport the plurality of support members 22 by one pitch in the alignment direction.

The drive control section is constituted by an appropriate electric circuit or a sequencer or the like, and transmits a drive signal to the motor 30 of the transfer means 23 in synchronization with the amount of web W introduced by the introduction section 12, and Is to operate. In the present embodiment, a detection unit 31 for detecting the length of the web W hanging from the introduction unit 12 is provided, and the detection unit 31 determines that the web W hanging from the introduction unit 12 has a predetermined length. When the drive control unit detects the motor 3
It is configured to transmit a drive signal to 0. Note that a proximity sensor or the like that detects the number of rotations of the feed roller 16 can be used as the detection unit 31.

The arm 28 is connected to the endless chain 2
6 A perpendicular to the tangential direction of which extends in a direction facing the outer circumferential side, between corresponding left and right arms 28, 28, round shaft-like supporting
A holding member 22 is provided, and these left and right arms 28,
A gate-shaped support member is constituted by 28 and the support member 22. That is, this portal support material is an endless chain 26
The web W is supported on a plurality of portal supports that are vertically installed on the upper side and are arranged in a plurality of rows in the horizontal direction, and the portal supports move together with the endless chain 26 as the web W advances.

A support member 22 composed of a round shaft extending over the entire length of the web W in the left-right width direction is supported by an arm 28 so as to be rotatable around its axis, and takes up the web W supported on the support member 22. When sequentially picking up from the unit 13,
The resistance generated between the web W and the support member 22 is reduced to facilitate the take-off operation, and the tensile force generated on the web W is further reduced.

The distance between the left and right arms 28 supporting each support member 22 is larger than the left and right width of the web W, and the arm 28 may contact the web W stocked in the storage section 11. I try not to.

The support members 22 are attached to the upper straight portion of the endless chain 26 that goes up and down via arms 28 of the same length. As a result, the plurality of support members 22 located on the outward path move in the horizontal direction. Be aligned. Further, the adjacent support members 22 located on the outward path are brought close to each other with a space (a space between the chain links in the present embodiment) at which a portion of the web W having a predetermined length in the longitudinal direction hangs down. Further, the support member 22 located on the return path is retracted largely downward so as not to come into contact with the web W accumulated in a multi-fold state.

On the other hand, the arm 28 attached to the chain link 27 at the portion wound around the sprockets 24 and 25
Are opened radially from the rotation centers of the sprockets 24 and 25, so that the distance between the support members 22 attached to the arm 28 is greatly increased.

Below the introduction section 12, a support member 22 attached via an arm 28 to a chain link 27 that circulates around the upstream sprocket 24 is connected to the introduction section 1.
In the process in which the support member 22 is transported to the starting end of the outward path while the support member 22 is transferred to the lower end side of the web W which is sequentially introduced from 2 and hangs down by its own weight, the support member 22 causes the longitudinal middle portion of the web W to be moved from below. It has become supported.

Further, in the storage device 4 of the present embodiment, a pressing member 32 for pressing the web W supported by the support member 22 from the end of the return path to the start of the forward path between the support member 22 is attached to the frame 10. Have been. The pressing member 3
The position 2 is changed by the air cylinder 33 (driving means) between a holding position pressed against the support member 22 and an open position separated from the support member 22. The pressing member 32 is configured such that the position is changed to the pressing position immediately after the support member 22 is moved by one pitch, and the position is changed to the open position when the transfer means 23 operates. When the web 23 is stopped, the web W to be introduced does not hang directly below the introduction portion 12 but hangs on the front side (upstream side) of the support member 22 in the process of supporting the web W. To prevent

The take-up section 13 is composed of a guide roller rotatably mounted on the frame 10 via a bracket 34. In the present embodiment, the take-off roller 13 guides and is not driven to rotate. However, the take-up roller 13 may be configured to be driven to rotate.

According to the web storage device 4 according to the present embodiment, the nonwoven fabric W is sent out by the feed roller 16 through the guide roller 14, and the leading end of the web W is hung downward. Then, the amount of droop from the feed roller 16 is measured by the detecting means 31, and when it is detected that the liquid has drooped by a predetermined length, a drive instruction signal is sent from the control unit to the motor 30, and the signal is transmitted through the counter shaft 31. Then, the endless chain 26 is driven to move the support member 22 by one pitch.

Then, the web W hanging from the feed roller 16 by its own weight is lifted by the support member 22 circulating from the end of the return path to the start end of the forward path, and the support member 22 moves below the pressing member 32.

When the support member 22 is moved by one pitch, the endless chain 26 stops and the holding plate 32
Is actuated by the cylinder 33 to press the web W against the support member 22 and prevent the web W from relatively moving in the longitudinal direction with respect to the support member 22.

Endless chain 26 (transfer means 23)
Is stopped, the web W is sequentially sent out by the feed roller 16 and hangs down continuously in the same manner. When the web W reaches a certain length, a driving instruction signal is output and the support member 22 is output. Moves by one pitch, and transfers the web W to the downstream side while sequentially folding the web. By repeating such an operation, the webs W are accumulated in a multiple fold in the horizontal direction, and the webs W are sent to the downstream end of the accumulation unit 11.

The web W stored in the storage section 11 passes through the guide roller 13 from its downstream end, and is taken up by the next process equipment.

In taking up the web W, the support member 22 is constituted by a rotatable round shaft.
The structure is such that tension is not easily applied to the web W.

[0045]

According to the present invention, the support member is provided with a web.
The part is configured to radiate radially and
The web from the bottom side with supporting members
I support them. In addition, the upstream located on the web introduction side
Downstream sprocket and the downstream side sprocket
An arm extends in the outer peripheral direction between each one of the
Endless chain having a support member attached to the arm
Is wound. As a result, the endless belt
Pact can be achieved. Also start supporting the web
At some point, the spacing between the support members is sufficient. like this
By suspending the web from below while suspending a certain amount of web in the space between adjacent supporting members with sufficient space, it is possible to accumulate the web horizontally in multiple folds, and to manufacture nonwoven fabric. Even when used in a line, when the web is accumulated or taken out of the accumulation section, almost no tensile force is applied to the web, so that the web weak to tension becomes thinner or the web breaks. This can prevent wrinkles and meandering of the web at the time of removal. Therefore, a sufficient length of web can be accumulated by providing a desired number of support members without deteriorating the quality of a material that is weak in tension, such as a nonwoven fabric.

[Brief description of the drawings]

FIG. 1 is an overall side view of a web storage device according to an embodiment of the present invention.

FIG. 2 is an enlarged side view of a main part of the device.

FIG. 3 is an overall plan view of the same device.

FIG. 4 is an overall front view of the same device.

FIG. 5 is a simplified side view of a conventional web storage device.

FIG. 6 is a simplified side view of a conventional web storage device.

[Explanation of symbols]

 Reference Signs List 4 Web storage device (accumulator) 11 Web storage unit 12 Web introduction unit 13 Web take-up unit 22 Support member 23 Transfer means 24 Upstream sprocket 25 Downstream sprocket 26 Endless chain 27 Chain link 28 Arm 30 Intermittent drive means W Web

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65H 20/00-20/40

Claims (6)

(57) [Claims] 1. A web storage device comprising: a web storage unit; a web introduction unit for introducing the web into the storage unit; and a web take-up unit for receiving the web stored in the storage unit from a downstream side. The accumulating unit includes a plurality of support members that support the middle portion in the longitudinal direction of the web from below at predetermined intervals in the longitudinal direction, a forward path from the web introducing unit side to the web taking-in side, and a web traveling unit side to the web introducing unit side. Transfer means for transferring each support member along an endless track including a heading return path, and a plurality of support members located on the outward path are horizontally aligned, and adjacent support members located on the outward path, A portion having a predetermined length in the longitudinal direction of the web is closely spaced with a space between the webs, and the transfer means includes an upstream side switch provided on the web introduction side.
Proket and the downstream sprocket located on the web take-up section side
Rocket and end wound between these sprockets
Chain and each chain link of the chain
And an endless chain.
Extending in the outer peripheral direction of the arm, and a support member is provided on the arm.
It is installed and automatically installed from the web
Located at the end of the return path on the lower side of the web
The support member is transferred while being expanded radially.
The support is provided so as to support a middle portion in the longitudinal direction of the web.
A web accumulating device configured to transfer a holding member toward a start point of an outward path . 2. The web accumulating device according to claim 1 , further comprising a pressing member for pressing a web supported by a supporting member from the end of the return path to the start of the outward path between the supporting member and the supporting member. 3. claims, characterized in that the introduction amount of the web by the web inlet portion and the operation of the transport means is synchronized
Item 3. A web storage device according to Item 2 . 4. A transfer means comprising intermittent drive means for intermittently transferring a plurality of support members at a pitch of an alignment interval, wherein said means has a predetermined length of web suspended from a web introduction portion. The web storage device according to claim 3 , wherein the web storage device is configured to operate when the web server is activated. 5. A support member as would consist round shaft across the width direction the entire length of the web, in any one of claims 1 to 4, characterized in that it is rotatable about its axis Web storage device as described. 6. A pair of right and left arms to which each support member is attached is provided, and a support member is provided between the left and right arms, and the interval between the left and right arms is larger than the left and right width of the web. Claims that have been made
Web storage device according to 5.