JP4683868B2 - Transport system - Google Patents

Description

  The present invention relates to a pitch changing device that sequentially receives conveyed items to be conveyed, and sequentially transfers the received conveyed items by changing a conveying pitch, and a conveying system including the pitch changing device.

In the sanitary napkin manufacturing apparatus, a sanitary napkin semi-finished product connected in a long shape is cut (trimmed) in the longitudinal direction, and a plurality of cut sanitary napkin semi-finished products are predetermined along the longitudinal direction. In the reversing device, the sanitary napkin is reversed 90 degrees so that the width direction thereof becomes the conveying direction, and further conveyed along the width direction.
In the reversing device, normally, a plurality of reversing heads for reversing the sanitary napkin by 90 degrees are provided in the circumferential direction, and each reversing head adsorbs one sanitary napkin and reverses the reversing head by 90 degrees. This reverses the direction of the sanitary napkin.

  On the other hand, the sanitary napkin has different lengths depending on the use and the like, and therefore the conveyance pitch (distance between the centers of adjacent sanitary napkins after cutting) is different. Therefore, according to the length of the sanitary napkin to manufacture, it replaced | exchanged for the inversion apparatus corresponding to the conveyance pitch.

  More specifically, as shown in FIG. 9 (a), a long sanitary napkin is cut by a trimming cutter 81 composed of opposing cutter rolls 81A and anvil rolls 81B, and a sanitary napkin Q having a predetermined length is cut. Is formed. The sanitary napkin Q is sequentially transported to the reversing device 83 at a predetermined transport pitch. In the reversing device 83, a plurality of reversing heads 83A for reversing the direction of the sanitary napkin Q by 90 degrees are connected to the central shaft 83C via a reversing arm 83B in the circumferential direction. Each reversing head 83A is attracted to one and transported in the circumferential direction.

  Thereafter, the seal roll 84 seals the sanitary napkin Q at a predetermined position, and then the reversal arm 83B reverses 90 degrees centering on the longitudinal direction, whereby the sanitary napkin Q adsorbed to the reversal head 83A. Of the sanitary napkin Q coincides with the transport direction. In this state, the sanitary napkin Q is transported in the horizontal direction by the turning roll 85 and transported to the next process.

However, when the sanitary napkin Q having a long length is manufactured through such a process, as shown in FIG. 9 (b), the peripheral diameter is larger than that of the reversing device 83 shown in FIG. 9 (a). It was necessary to replace the reversing device 83 with a large peripheral speed. The seal roll 84 and the turning roll 85 were also exchanged in the same manner. The replacement of the reversing device 83 or the like requires about 3 to 4 workers over the required time of about 4 hours, and it is necessary to prepare a reversing device for each type of length. Is bad and the equipment costs are high.
Such a problem similarly occurs when an absorbent article other than a sanitary napkin is transported or when an article other than an absorbent article is transported as a transported object.

  On the other hand, Patent Document 1 below discloses an apparatus including a rotating body (roll) that sucks and conveys a plurality of conveyed objects on a peripheral surface. In this apparatus, the conveyance pitch of the conveyed product can be changed by changing the peripheral speed of the rotator during one cycle of processing by the rotator.

JP 2003-145485 A

  However, in the apparatus described in Patent Document 1, it is only possible to change the same transport pitch for the entire transported object, and it is not possible to independently change the transport pitch for each transported object.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a pitch changing device capable of sequentially receiving transported articles having different lengths and transport pitches, and sequentially transferring the received transported articles by changing the transport pitch independently for each transported object. It is providing the conveyance system provided with the change apparatus.

  The present invention is a pitch changing device that sequentially receives a conveyed product conveyed from a first conveying device, and sequentially transfers the received conveyed material to a second conveying device by changing a conveying pitch. A plurality of receiving heads for receiving an object from the first transport device and delivering the received transport product to the second transport device, each of the plurality of receiving heads being driven independently; The object is achieved by providing a pitch changing device capable of changing the transport pitch of the transported object by independently controlling the driving speed of the receiving head. Is.

  In addition, the present invention is a transport system including the first transport device, the pitch changing device, and the second transport device, wherein the first transport device detects a transport speed of the transported object. A speed sensor for detecting the transport position of the transported object, and a pitch sensor for detecting the transport pitch of the transported object. The pitch changing device is configured so that the driving speed of the receiving head is the speed sensor. The position sensor and the pitch sensor are controlled based on the speed information, the position information, and the pitch information, respectively, and the transported object is the first transport device, the pitch change device, The present invention provides a transport system that delivers in the order of the second transport device.

  According to the pitch changing device and the transport system including the pitch changing device of the present invention, sequentially received transported materials are sequentially received, and the received transported materials are sequentially changed by independently changing the transport pitch for each transported material. Can be handed over.

DESCRIPTION OF EMBODIMENTS Hereinafter, a pitch changing device according to the present invention will be described with reference to the drawings with respect to a first embodiment which is a preferred embodiment thereof.
As shown in FIGS. 1 and 2, the pitch changing device 1 according to the first embodiment sequentially receives the conveyed product Q conveyed from the first conveying device K <b> 1 and receives the received conveyed product Q as the second conveying device. A pitch changing device that changes the transfer pitch to K2 and sequentially transfers the received transfer object Q from the first transfer device K1 and transfers the received transfer product Q to the second transfer device K2. A plurality of receiving heads 2 are driven independently of each other. By controlling the driving speed of the receiving heads 2 independently, the transport pitch of the transported article Q is controlled. Can be changed.

The pitch changing device 1 of the first embodiment will be described in detail. In the pitch changing device 1 of the present embodiment, as shown in FIGS. 1 and 2, the conveyed product Q is sequentially received from the first conveying device K1, and the received conveyed product Q is sequentially received by the second conveying device K2. A plurality (three in this embodiment) of receiving heads 2 (2A to 2C) are provided.
The receiving head 2 includes an adsorption surface 21 that can adsorb a sanitary napkin Q having a long length, and a plurality of suction ports 22 are formed in the adsorption surface 21. Suction ducts 24 (24 </ b> A to 24 </ b> C) are connected to the back surface 23 (the surface opposite to the suction surface 21) of the receiving head 2.

The pitch changing device 1 according to the present embodiment is provided with a central shaft 43 extending in the horizontal direction. Cylindrical rotating cylinders 41 (41A to 41C) are extrapolated on the center shaft 43 in a triple manner. One end portion (the lower right end portion in FIG. 1) of the triple rotating cylinder 41 is arranged so as to protrude in a stepped manner.
Support arms 3 (3 </ b> A to 3 </ b> C) extend in one end of the triple rotating cylinder 41 in a direction substantially orthogonal to the central axis of the rotating cylinder 41. The receiving head 2 is provided at one end of the support arm 3 (the end on the side not connected to the rotating cylinder 41).

At one end of the central shaft 43, a duct concentrating portion 44 where the duct concentrates is provided. The other end portions of the suction ducts 24 </ b> A to 24 </ b> C provided on the back surface 23 of each receiving head 2 are connected to the duct concentration portion 44. The three suction ducts 24 </ b> A to 24 </ b> C communicate with each other inside the duct concentrating portion 44, and further communicate with a suction machine (not shown) via a connecting duct 24 </ b> D provided in the duct concentrating portion 44. . A suction force is generated on the suction surface 21 by suction from the suction port 22 via the connection duct 24D and the suction ducts 24A to 24C.
First pulleys 42 (42 </ b> A to 42 </ b> C) are provided on the other end of the triple rotating cylinder 41 (the upper left end in FIG. 1) in a stepwise manner.

  In the pitch changing device 1 of the present embodiment, three servo motors 51 (51A to 51C) are provided as drive sources for the receiving head 2. Second pulleys 52 (52A to 52C) are provided on the drive shafts of the servomotors 51A to 51C, respectively. Endless belts 53 (53A to 53C) are wound around the first pulleys 42A to 42C and the second pulleys 52A to 52C, respectively.

  In the pitch changing device 1 of the present embodiment configured as described above, when the three servo motors 51A to 51C are driven, the rotating cylinders 41A to 41C rotate through the endless belts 53A to 53C, respectively, and further rotate. The receiving heads 2A to 2C rotate about the central axis 43 as a rotation axis via support arms 3A to 3C connected to the cylinders 41A to 41C. That is, the receiving heads 2A to 2C are independently driven in synchronization with the driving of the servo motors 51A to 51C that are independently driven.

As shown in FIG. 2, the pitch changing device 1 according to the present embodiment is disposed between the first transport device K1 and the second transport device K2, and is transported from the first transport device K1. The plurality of sanitary napkins Q are sequentially received, and the received plurality of sanitary napkins Q are sequentially transferred to the second transport device K2 by changing the transport pitch.
The first transport device K1 transports the sanitary napkin Q along its longitudinal direction. The first transport device K1 is provided with a trimming cutter 81 composed of an opposing cutter roll 81A and an anvil roll 81B, and a long sanitary napkin Q transported from the right side to the left side of the drawing. It can be cut to a predetermined length. A delivery roll 82 is provided on the downstream side of the trimming cutter 81, and the cut sanitary napkin Q is delivered to the pitch changing device 1 of the present embodiment.

  A second transfer device K2 is provided on the subsequent process side of the pitch changing device 1 of the present embodiment. The second transport device K2 transports the sanitary napkin Q along its longitudinal direction, then reverses it 90 degrees so that its width direction faces the transport direction, and transports it along its width direction. is there. In the second transport device K2, a reversing device 83, a seal roll 84, and a turning roll 85 are provided.

The reversing device 83 reverses the direction of the sanitary napkin Q by 90 degrees. Specifically, the sanitary napkin Q being transported along the longitudinal direction is transported along the width direction thereof. Invert 90 degrees. The reversing device 83 is provided with a plurality of reversing arms 83B extending radially from the rotating shaft 83C in front view, and each reversing arm 83B is provided with a reversing head 83A. The reversing head 83A can adsorb the sanitary napkin Q. The reversing arm 83 rotates about its longitudinal direction as a rotation axis, and rotates at an equiangular speed about the rotation axis 83C. Therefore, the direction of the sanitary napkin Q adsorbed by the reversing head 83A can be reversed by 90 degrees by rotating the longitudinal direction of the reversing arm 83B as the rotation axis, and the sanitary napkin Q can be rotated by the rotation shaft 83C. Can be rotated at an equiangular speed.
The length of the reversing head 83A is a length capable of adsorbing the longest sanitary napkin Q that can be manufactured.

  The seal roll 84 is provided at a position facing the reversing head 83A of the reversing device 83. A seal forming portion 84 </ b> A is provided on the circumferential surface of the seal roll 84 so that the sanitary napkin Q conveyed by the reversing device 83 can be sealed. As soon as the sanitary napkin Q is sealed by the seal roll 84, the direction of the sanitary napkin Q is reversed 90 degrees.

The turning roll 85 is provided on the subsequent process side of the seal roll 84, and after being sealed by the seal roll 84, the conveyance direction of the sanitary napkin Q whose direction is reversed is turned in the horizontal direction. ing.
The sanitary napkin Q whose transport direction is set to the horizontal direction by the turning roll 85 is transported to the next process.

  As shown in FIG. 3, the first transport device K1 includes a speed sensor S1 that detects the transport speed of a transported object (the sanitary napkin Q in the present embodiment), and a position sensor that detects the transport position of the transported object. S1 and a pitch sensor S2 for detecting the transport pitch of the transported object are provided. In addition, the pitch changing device 1 controls the driving speed of the receiving head 2 based on speed information, position information, and pitch information detected by the speed sensor S1, the position sensor S1, and the pitch sensor S2, respectively. It has become.

More specifically, a speed / position sensor S 1 serving as the speed sensor and the position sensor is provided in the vicinity of the trimming cutter 81. The speed / position sensor S1 detects speed information and position information of the sanitary napkin Q cut by the trimming cutter 81, and outputs them to the control device S3.
In addition, a pitch sensor S2 is provided in the final transport process (the process of delivering the sanitary napkin Q to the pitch changing apparatus 1) in the first transport device K1. The pitch sensor S2 detects the pitch information of the sanitary napkin Q in the final transport process, and outputs this to the control device S3 that controls the driving speed of the receiving head 2 in the pitch changing device 1.

  The control device S3 controls the driving speed of the receiving head 2 in the pitch changing device 1 with various control patterns based on the speed information, the position information, and the pitch information. As schematically shown in the A row in FIG. 4, the control pattern in the present embodiment is obtained by setting the transport pitch of the sanitary napkin Q cut to a short length in the first transport device K1 to the second transport device. This is a pattern adapted to match the pitch of the reversing head 83A of the reversing device 83 at K2.

  A preferred embodiment of the transport system according to the present invention includes the first transport device K1, the pitch changing device 1 of the embodiment, and the second transport device K2. The transfer device K1, the pitch changing device 1, and the second transfer device K2 are transferred in this order.

The operation of the pitch changing device 1 according to the present embodiment configured as described above will be described together with the operations of the first transport device K1 and the second transport device K2.
As shown in FIG. 2, in the 1st conveying apparatus K1, the elongate sanitary napkin is cut | disconnected by the trimming cutter 81, and the sanitary napkin Q of predetermined length is formed. The sanitary napkin Q is delivered to the pitch changing device 1 of the present embodiment via the delivery roll 82. The sanitary napkin Q is adsorbed to the adsorption surface 21 of the receiving head 2 that is rotating at substantially the same peripheral speed as the conveyance speed of the first conveyance device K1.

Thereafter, the receiving head 2 is rotated at the same peripheral speed as the transport speed in the first transport device K1 for a while and then temporarily accelerated to a peripheral speed faster than the transport speed in the second transport device K2. Then, as indicated by a two-dot chain line in FIG. 2, the peripheral speed is reduced until it becomes the same as the transport speed in the second transport device K2. Here, the transport pitch of the sanitary napkin Q matches the transport pitch of the reversing head 83A in the reversing device 83.
In this state, the sanitary napkin Q is transferred from the receiving head 2 in the pitch changing device 1 to the reversing head 83A in the reversing device 83. Thereafter, the peripheral speed of the receiving head 2 is reduced until it becomes the same as the conveying speed in the first conveying device K1, and the sanitary napkin Q is delivered to the receiving head 2 again.
Control of the driving speed of the receiving head 2 having such a pattern is performed by the control device S3 based on the speed information, the position information, and the pitch information.

  One sanitary napkin Q is adsorbed for each reversing head 83A and conveyed in the circumferential direction. Thereafter, the seal roll 84 seals the sanitary napkin Q at a predetermined position, and then the reversal arm 83B reverses 90 degrees centering on the longitudinal direction, whereby the sanitary napkin Q adsorbed to the reversal head 83A. Of the sanitary napkin Q coincides with the transport direction. In this state, the sanitary napkin Q is transported in the horizontal direction by the turning roll 85 and transported to the next process.

  As described above, according to the pitch changing device 1 of the present embodiment, the plurality of receiving heads 2 are independently driven, and the driving speed of the receiving head 2 is controlled independently. The transport pitch of the sanitary napkin Q can be changed. Therefore, a plurality of sanitary napkins Q having different lengths and conveyance pitches can be sequentially received, and the plurality of received sanitary napkins Q can be sequentially transferred by changing the conveyance pitch independently for each sanitary napkin Q. .

Further, even when the sanitary napkin Q having a different length is manufactured by changing the control pattern of the receiving head 2, it is not necessary to change the size, the angular velocity, or the like of the reversing device.
More specifically, the control pattern of the receiving head 2 when manufacturing a sanitary napkin Q having a length longer than that of the sanitary napkin Q shown in the A row as shown in the B row of FIG. 4 is as follows. That's fine.

  In the first transport device K1, when the long sanitary napkin Q is cut and a long sanitary napkin Q is formed, as shown in the B row of FIG. Compared with the conveyance pitch of the short absorbent article Q, a conveyance pitch becomes large and the delivery time of the sanitary napkin Q from the 1st conveyance apparatus K1 to the pitch change apparatus 1 becomes long. In this case, in the pitch changing device 1 of the present embodiment, after receiving the sanitary napkin Q from the first transport device K1, before the delivery to the second transport device K2, the degree of acceleration of the receiving head 2 is determined. By enlarging, in the 2nd conveying apparatus K2, the conveyance pitch of the sanitary napkin Q can be made the same as the conveyance pitch of the sanitary napkin Q with the short length shown to A row.

When changing the transport pitch for a transported product Q that is regularly transported at an equal transport pitch in the first transport device K1 as shown in row A or row B of FIG. Control using a sensor and a pitch sensor is not necessarily required.
Thus, when the transport pitch is not constant, the transport pitch can be easily made constant by performing control using the speed sensor, the position sensor, and the pitch sensor described above.

  In particular, the first transport device K1 detects the speed sensor S1 that detects the transport speed of the transport object (sanitary napkin) Q, the position sensor S1 that detects the transport position of the transport object Q, and the transport pitch of the transport object Q. When the pitch sensor S2 is provided and the driving speed of the receiving head 2 is controlled based on the speed information, the position information, and the pitch information respectively detected by the speed sensor S1, the position sensor S1, and the pitch sensor S2, For example, when the transported object Q is transported at a transport pitch that is not constant in the first transporting device K1 as shown in the C row of FIG. 4, the speed information of the transported object Q by the speed / position sensor S1 and The position information is detected, the transport pitch is detected by the pitch sensor S2, and the driving speed of the receiving head 2 is independently determined based on the information. And to control, it is possible to the conveying pitch of the conveyed object Q of the second transfer device K2 constant.

  The control pattern of the driving speed of the receiving head 2 can be appropriately changed according to the transport pattern of the transported object. For example, it may be changed in the order of (1) acceleration → constant speed → acceleration → deceleration. It may be changed in the order of constant speed → acceleration → constant speed → acceleration.

Next, 2nd Embodiment which is another embodiment of the pitch change apparatus of this invention is described. The second embodiment will be described with a focus on differences from the first embodiment, and the description of the first embodiment will be appropriately applied to points that are not particularly described. Also in the second embodiment, it is used in the same manner as the first embodiment, and the same effect as the first embodiment is achieved.
The pitch changing device 1 according to the second embodiment shown in FIG. 5 is not the second conveying device but the receiving head of the pitch changing device, rather than the second conveying device, as compared with the pitch changing device according to the first embodiment. The main difference is that it is done in

In other words, the pitch changing device 1 according to the second embodiment receives the sanitary napkin Q, which is a conveyed product, from the first conveying device K1 until the receiving head 2 delivers the sanitary napkin Q to the second conveying device K2. By rotating the head 2 by 90 degrees, the conveyed product Q is transferred to the second conveying device K2 with its direction reversed by 90 degrees. Further, the second conveying device K2 is not provided with the reversing device 83 unlike the second conveying device K2 in the first embodiment, and instead, a receiving roll 86 having no reversing function is provided. Is provided.
The receiving roll 86 receives the sanitary napkin Q that is a conveyed product from the receiving head 2 of the pitch changing device 1, and rotates the conveyed product Q in the circumferential direction without reversing the direction thereof. Except for the point of not reversing, the function, arrangement, etc. are the same as those of the reversing device 83 in the pitch changing device of the first embodiment.

  A cam mechanism is used to reverse the receiving head 2. More specifically, as shown in FIG. 6, the receiving head 2 is provided on the grooved shaft 6 with the cam groove 61 formed on the peripheral surface via the support arm 3. The three support arms 3 are each linearly formed in a plan view along the peripheral surface of the grooved shaft 6, independently of each other by a drive mechanism (not shown) driven by a servomotor via a connecting rod 33. 6 (along the reference line T shown in FIG. 6), so that the three receiving heads 2 connected to each support arm 3 are independently driven. Yes.

The cam groove 61 constituting the cam mechanism includes a parallel groove portion 62 extending in parallel with the circumferential direction of the grooved shaft 6 and a skew groove portion 63 extending obliquely in the circumferential direction. And the oblique groove portions 63 are alternately connected to form a substantially sine wave as a whole.
A follower 31 extending along the peripheral surface of the grooved shaft 6 is provided at the base end portion of the support arm 3 with a 45 ° inclination with respect to the longitudinal direction of the receiving head 2 in plan view. A cam floor 32 extending toward the center of the grooved shaft 6 is provided on the side of the follower 31 where the support arm 3 is not connected. The cam floor 32 is made of a roller and is loosely fitted in the cam groove 61.

The configuration and operation of the pitch changing device 1 according to the second embodiment will be described together with the operations of the first transfer device K1 and the second transfer device K2.
First, as shown in FIG. 5, a sanitary napkin Q having a predetermined length is formed by the trimming cutter 81 in the first transport device K1. The sanitary napkin Q is delivered to the suction surface 21 of the receiving head 2 in the pitch changing device 1 of the second embodiment via the delivery roll 82. The operation so far is the same as that of the first embodiment shown in FIG.

  As shown in FIG. 6, when the support arm 3 is driven via the connecting rod 33, the support arm 3 and the receiving head 2 connected thereto move along the reference line T. Thus, since the cam floor 32 is loosely fitted in the cam groove 61, the cam floor 32 moves along the substantially sinusoidal cam groove 61. Therefore, the direction of the receiving head 2 changes depending on the position of the cam floor 32 in the cam groove 61.

  Specifically, as shown in FIG. 6, when the cam floor 32 is positioned in the parallel groove portion 62 of the region T1 in the cam groove 61, the receiving head 2 has a longitudinal direction in the circumferential direction of the grooved shaft 6 (reference). (Direction of line T). When the cam floor 32 is positioned in the oblique groove portion 63 of the region T2 in the cam groove 61, the follower 31 is gradually reversed, and as a result, the receiving head 2 is also gradually reversed.

When the support arm 3 further moves and the cam floor 32 is positioned in the parallel groove portion 62 of the region T3 in the cam groove 61, the receiving head 2 is inverted 90 degrees from the direction in the region T1. In the region T3, the connecting rod 33 is decelerated in the circumferential direction of the grooved shaft 6, and the interval between the adjacent support arms 3, that is, the adjacent receiving heads 2 is shortened. In this state, the sanitary napkin Q is transferred from the receiving head 2 to the receiving roll 86.
That is, each receiving head 2 is independently 90 degrees from receiving the sanitary napkin Q, which is a conveyed product, from the first conveying device K1 to delivering it to the second conveying device K2. In addition to being reversed, the pitch with the adjacent receiving head 2 can be changed.

  When the support arm 3 further moves and the cam floor 32 moves in the oblique groove portion 63 of the region T4 in the cam groove 61, the orientation of the follower 31 with respect to the peripheral surface of the grooved shaft 6 is returned to the original direction by 90 degrees. The direction of the receiving head 2 connected to the support arm 3 is also reversed 90 degrees so that the longitudinal direction thereof is parallel to the circumferential direction of the grooved shaft 6. That is, the direction of the receiving head 2 returns to the original direction (the direction in the region T1), and the pitch with the adjacent receiving head also returns.

In this state, the sanitary napkin Q is delivered from the delivery roll 82 to the suction surface 21 of the receiving head 2.
That is, each receiving head 2 is independently opposite in direction from the delivery of the sanitary napkin Q, which is a conveyed product, to the second conveying device K2 until it returns to the first conveying device K1 side. The angle is reversed 90 degrees to return to the original direction, and the pitch with the adjacent receiving head can be changed.

  On the other hand, the conveyed product Q whose direction is reversed and whose conveyance pitch is changed is delivered to the receiving roll 86 as shown in FIG. The conveyed product Q delivered to the receiving roll 86 is then sealed by the seal roll 84, and then the conveyance direction of the conveyed product Q is turned in the horizontal direction by the turning roll 85, as in the first embodiment. It is conveyed to the next process.

Thus, according to the pitch change device of the second embodiment, the transfer pitch of the sanitary napkin Q, which is a transfer object, can be changed, so that the same effect as the pitch change device of the first embodiment is achieved. Further, since the direction of the conveyed product Q can be reversed similarly to the reversing device 83, the reversing device can be omitted in the second transporting device K2.
Therefore, even when the sanitary napkin Q having a short length as shown in FIG. 7 is transported as a transported object, or when the sanitary napkin Q having a long length as shown in FIG. In the pitch changing device, the sanitary napkin Q can be changed to a conveyance pitch corresponding to its length and the direction can be reversed by 90 degrees, and the sanitary napkin Q can be reversed by 90 degrees in the second state. To the transfer device K2.

The preferred embodiments of the present invention have been described above. However, the pitch changing device and the transport system of the present invention are not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit of the present invention. .
The driving source of the receiving head is such that each receiving head is driven independently, and the driving speed of the receiving head is controlled independently, so that the transport pitch of the transported object can be changed. For example, a stepping motor may be used.
It is not restricted to the form which delivers a conveyed product to a 2nd conveying apparatus with a fixed conveyance pitch, It can also be set as the form which delivers a conveyed product to a 2nd conveying apparatus with a random conveying pitch.
The conveyed item to be conveyed is not limited to a sanitary napkin, and may be an absorbent article such as a disposable diaper or an article other than the absorbent article.
The mechanism for rotating the receiving head by 90 degrees is not limited to the cam mechanism, and may be a rotary air cylinder mechanism, for example.

FIG. 1 is a perspective view showing a first embodiment of the pitch changing device of the present invention. FIG. 2 is a front view schematically showing a sanitary napkin manufacturing apparatus including the pitch changing apparatus according to the first embodiment shown in FIG. 1. FIG. 3 is a front view schematically showing a sensor in the first transport device shown in FIG. FIG. 4 is a plan view schematically showing a change in the conveyance pitch of the conveyed product. FIG. 5: is a front view which shows typically the manufacturing apparatus of the sanitary napkin containing 2nd Embodiment of the pitch change apparatus of this invention (corresponding figure of FIG. 2). FIG. 6 is a perspective view showing a state in which the peripheral surface of the grooved shaft in the pitch changing device of the second embodiment shown in FIG. 5 is virtually developed. FIG. 7 is a plan view schematically showing the operation of changing the transport pitch and reversing the direction of a sanitary napkin having a short length. FIG. 8 is a plan view schematically showing the operation of changing the conveyance pitch and reversing the direction of a sanitary napkin having a long length. FIGS. 9A and 9B are front views schematically showing a conventional sanitary napkin manufacturing apparatus.

Explanation of symbols

1 Pitch changing device 2, 2A, 2B, 2C Receiving head 3, 3A, 3B, 3C Support arm 21 Suction surface 22 Suction port 23 Back surface 24A, 24B, 24C Suction duct 41A, 41B, 41C Rotating cylinder 42A, 42B, 42C 1 pulley 42
43 Central shaft 44 Duct concentration portion 51A, 51B, 51 Servo motor 52A, 52B, 52C Second pulley 52
53A, 53B, 53C Endless belt 6 Grooved shaft 61 Cam groove 83 Reversing device 83A Reversing head 83B Reversing arm 83C Rotating shaft K1 First conveying device K2 Second conveying device Q Conveyed material (Sanitary napkin)

Claims (6)

A transport system comprising a first transport device, a pitch change device, and a second transport device,
The pitch changing device sequentially receives a conveyed product conveyed from the first conveying device, changes the conveying pitch, and turns the conveyed product into a second conveying device that rotates at a constant angular velocity at a constant conveying pitch. It is supposed to be delivered sequentially,
The first transport device includes a speed sensor that detects a transport speed of the transported object, a position sensor that detects a transport position of the transported object, and a pitch sensor that detects a transport pitch of the transported object. ,
The pitch changing device includes a plurality of receiving heads that receive the conveyed product from the first conveying device and deliver the received conveyed material to the second conveying device;
The plurality of receiving heads are each driven independently,
The driving speed of the receiving head is controlled independently based on the speed information, the position information, and the pitch information detected by the speed sensor, the position sensor, and the pitch sensor, respectively. A transport system that can change the transport pitch.   The transport system according to claim 1, wherein the driving source of the receiving head is a servo motor.   The first transport device transports the transported material along its longitudinal direction, and the second transport device transports the transported material along its longitudinal direction and then its width direction. The transport system according to claim 1, wherein the transport system is reversed 90 degrees so as to face the transport direction and transports along the width direction.   The receiving head rotates the receiving head 90 degrees from receiving the conveyed product from the first conveying device to delivering it to the second conveying device. The transport system according to claim 1 or 2, wherein the direction is reversed 90 degrees and delivered to the second transport device.   The conveyance system according to claim 1, wherein the conveyed product is an absorbent article. Used in the transport system according to any one of claims 1 to 5 sequentially receives the transported material conveyed from the first conveying device, by changing the conveyance pitch, constant angular velocity of the conveyed object at a constant conveying pitch A pitch changing device that sequentially delivers to a second conveying device that rotates at
A plurality of receiving heads for receiving the conveyed product from the first conveying device and delivering the received conveyed material to the second conveying device;
The plurality of receiving heads are each driven independently,
The driving speed of the receiving head is independently based on the speed information, the position information, and the pitch information detected by the speed sensor, the position sensor, and the pitch sensor provided in the first transport device, respectively. A pitch changing device configured to change a transport pitch of the transported object by being controlled.

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