CN210673571U - Folding device for disposable sanitary article - Google Patents

Abstract

The utility model provides a folding device of disposable hygienic articles, include: a first transport portion that transports the disposable hygienic article along a first path; a second transport unit that transports the disposable hygienic article along a second path extending in a direction intersecting the first path; a folding mechanism having a folding member for folding the disposable hygienic article between the first transport portion and the second transport portion; a driving mechanism connected to the folding member for driving the folding member by reciprocating the linear movement in the second path direction between the folding position and the retreat position; and a guide mechanism for guiding the front end of the disposable sanitary product to the opposite side of the second conveying part in the extending direction of the first path or by taking the extending line of the first path as a reference. The driving mechanism is a structure that at least one belt wheel directly connects with a servo motor and a synchronous belt and is hung on the periphery of the belt wheel according to a ring-shaped path. The utility model discloses a folding device can carry out high-speed folding when avoiding disposable hygienic articles to produce the fold.

Description

Folding device for disposable sanitary article

Technical Field

The utility model belongs to disposable hygienic articles manufacture equipment field especially relates to the manufacture equipment field of panty-shape diapers, pull-up diaper, women's sanitary pants etc. specifically is a disposable hygienic articles's folding device.

Background

In a conventional method and apparatus for folding disposable sanitary products, the disposable sanitary products are conveyed by a conveying portion formed by a pair of conveying surfaces moving in the same direction, and the folded disposable sanitary products are folded by pushing a folding member into an intermediate portion of the disposable sanitary products being conveyed.

Chinese patent publication No. CN203568565U, which is a patent document "folding device for sheet-like structures", discloses that the folding member is a plate member having a disk portion disposed coaxially with the rotation axis of the rotation shaft and a pair of blades projecting radially outward from the disk portion, the two blades are disposed at an interval of 180 ° around the rotation axis of the rotation shaft, and the folding member is driven by a drive mechanism to rotate so as to sequentially pass through a retreat position and a folding position. The retracted position is a position that avoids contact with the sheet-like articles that are discharged from the discharge ports of the two sets of conveyor belt assemblies (first conveying units). The folding position is a position at which a part (blade) of the folding member is pushed into the inlet port from a position (upper position) opposite to the two sets of conveyor belt assemblies (second conveying portions) with respect to the sheet-like article led out from the outlet port, the sheet-like article is folded, and the folded sheet-like article is guided into the inlet port.

The folding member is a blade that rotates about a rotation axis in a direction perpendicular to the 2 nd conveying section and abuts against an intermediate portion of the sheet-like article when folded. Since the sheet-like article is pushed into the conveying section, the sheet-like article and the blade move relative to each other in a direction intersecting the conveying direction with the rotation of the blade to generate a frictional force, which causes the sheet-like article to wrinkle, and affects the appearance of the folded sheet-like article.

SUMMERY OF THE UTILITY MODEL

As described above, in the folding device for a sheet-like structure disclosed in the patent document, since the folding member rubs against the sheet-like article to be folded, the sheet-like article is wrinkled, and the beauty of the folded sheet-like article is impaired. Further, the blades are disposed at an interval of 180 ° around the rotation axis of the rotation shaft, that is, the sheet-like articles are folded by 2 blades (folding members) in turn, and the folding speed is limited, and the folding cannot be performed at a high speed.

Therefore, the utility model provides a folding device of disposable hygienic articles can avoid disposable hygienic articles to produce the fold when being folded and influence the folding pleasing to the eye of slice article.

Furthermore, the utility model provides a folding device of the disposable hygienic article which can realize the fast folding.

The utility model also provides a folding device of disposable hygienic articles, which can simply adjust the folding device to correspond to the disposable hygienic articles with different sizes.

And, the utility model also provides a folding device of disposable hygienic articles, also can avoid folding device's shake carrying out high-speed folding in-process.

The utility model provides a folding device of disposable hygienic articles, it includes: a first transport unit that transports the disposable hygienic article along a first path in a state where the disposable hygienic article is sandwiched from front and rear sides, and that has a lead-out port provided at a terminal end of the first path; a second transport unit that transports the disposable sanitary article from a terminal end of the first path along a second path extending in a direction intersecting the first path while sandwiching the disposable sanitary article from front and back sides, and that has an inlet provided at a leading end of the second path; a folding mechanism having a folding member for folding the disposable hygienic articles between the first and second transport portions; a drive mechanism connected to the folding member and configured to drive the folding member by reciprocating linear motion in a direction of a second path between a folding position at which the disposable hygienic article fed out from the outlet is folded by pushing a part of the folding member into the inlet in the direction of the second path and to guide the folded disposable hygienic article into the inlet, and a retracted position at which the folding member is detached from the inlet after the folding member is linearly moved in a direction opposite to the second path; and a guide mechanism that guides the distal end portion of the disposable sanitary product, which is led out from the outlet port, to the opposite side of the second conveying portion in the extension direction of the first path or with reference to the extension line of the first path in a state where the proximal end portion of the disposable sanitary product is sandwiched by the first conveying portion from the front and back sides, wherein the drive mechanism is configured such that at least one pulley direct-connection servomotor and a timing belt are looped around the periphery of a pulley.

The term "front and back sides" refers to one side of the disposable sanitary product facing outward and the opposite side thereof.

The driving mechanism may be a mechanism capable of linearly reciprocating the folding member, and may be a combination of a pressing member such as a spring and a motor for moving the folding member in accordance with the pressing force, a combination of a motor and a link mechanism, or the like. In the present invention, the servo motor is used as the driving device, so that the change of the timing and the moving range of the reciprocating movement of the folding member when the size of the disposable sanitary article is changed can be more easily coped with, and the high speed can be realized. The speeding up will be described later.

Folding parts in the folding mechanism are connected with a driving mechanism, a servo motor is preferably selected by the driving mechanism to be directly connected with a belt wheel, and a synchronous belt is hung on the peripheral structure of the belt wheel according to a ring path, wherein at least one of the belt wheels of the synchronous belt is driven by the servo motor, the driving mechanism adopts a synchronous belt form, so that the folding parts can rapidly and reciprocally move linearly together along the direction consistent with the second conveying part, the whole folding mechanism is not worn, and the folding mechanism is simple in structure and low in cost.

Since the driving mechanism adopts the servo motor to directly connect the belt wheel, as long as the servo motor rotates positively and negatively, the folding component can linearly reciprocate in the direction of the second conveying part through the synchronous belt arranged on the periphery of the belt wheel. Further, the cooperating position of the folding member to the timing belt can be changed by controlling the rotation range of the servo motor, the range of the reciprocating linear motion of the folding member can be changed, and the size of the hygienic product can be more easily changed.

Preferably, the synchronous belt is a toothed belt, and correspondingly, a toothed pulley is also adopted as the pulley. Preferably, the core wire of the synchronous belt is made of carbon fiber, so that the light weight characteristic in a high-speed state is satisfied. Preferably, the driving mechanism further includes guide wheels provided on both sides in a width direction of one side of the timing belt of the endless path, respectively, for guiding the timing belt in a deviation correction in the linear reciprocating movement of the folding member.

Preferably, the folding mechanism further comprises a plurality of rollers which are arranged on one side of the folding component far away from the tooth form of the synchronous belt and are used for matching the folding component to do linear reciprocating motion, and the rollers roll along the tangent direction of the folding component. Therefore, the folding component can run more smoothly under the condition of high-speed running.

Preferably, the folding mechanism further includes a link member connecting the timing belt and the folding member. The folding mechanism further includes a first sensor, a second sensor, and a third sensor, the first sensor being capable of detecting a position of the folding member by the sensed portion, the second sensor being capable of detecting an upper limit position of the folding member, and the third sensor being capable of detecting an origin return position of the folding member. The position of the sensed part may be detected by the first sensor, the second sensor, and the third sensor, or the tip end part of the folding member may be directly detected. The sensed portion may be provided on the material that moves back and forth, or may be provided at an appropriate position of the folding member or the timing belt other than the cooperating member. According to such a configuration, the folding member is driven by the servo motor to reciprocate linearly in the direction of the second path with accurate positioning, and the folding member is driven by reciprocating linearly in the direction of the second path between the folding position and the retracted position.

Preferably, the folding member has a Y-shaped plate structure, and includes an installation portion attached to the timing belt and a folding portion pressed into the introduction port to fold the disposable hygienic article, and the installation portion has a width smaller than that of the folding portion. This particular arrangement allows for balancing of the folding member as it moves so that it does not flutter at high speeds.

Preferably, the drive mechanism is switched between the folding position and the retracted position and controlled by a synchronization signal of an encoder or a cam curve.

Preferably, the second path is perpendicular to the first path, and the disposable hygienic article is folded by the folding means in a flat state. The folding device is not easy to generate wrinkles, is beneficial to folding of the disposable sanitary product, and can avoid the problems of asymmetric folding and size deviation of the disposable sanitary product caused by the wrinkles.

According to the utility model discloses a disposable hygienic articles's folding device can avoid disposable hygienic articles to produce the fold at folding in-process, has guaranteed folding effect effectively. And the folding device has simple structure and easy control, and can realize the quick switching of the folding mechanism between the folding position and the retreat position. And the disposable sanitary articles with different sizes can be adjusted through the servo motor, so that convenience is provided for code changing of products. Meanwhile, the folding efficiency is effectively guaranteed, and the folding mechanism is suitable for high-speed folding.

Drawings

Fig. 1 is a schematic view showing the overall structure of a folding device according to embodiment 1 of the present invention;

FIG. 2 is a view showing the structure of pull-up pants as a disposable sanitary article according to the present invention;

FIG. 3 is a state view of the pull-up diaper shown in FIG. 2 folded by the folding device of the present invention;

fig. 4 is a front view of the folding mechanism of embodiment 1;

FIG. 5 is a side view of the folding mechanism of embodiment 1 (mainly showing a roller portion);

FIG. 6 is a side view of the folding mechanism of embodiment 1 (mainly showing the folding member and the sensor portion);

FIG. 7 is a view showing the mounting relationship and structure of the link and the folder in FIG. 6;

FIG. 8 is a partial view of a folding mechanism portion of embodiment 1;

fig. 9 is a state diagram of the folding device of embodiment 1 in which the folding member is driven to one of the retreat positions (the position of the folding member is about to enter the folding position);

fig. 10 is a state diagram in which the folding member is driven to the folded position in the folding apparatus of embodiment 1;

fig. 11 is a perspective view of the folding mechanism of embodiment 1:

fig. 12 is a schematic view of the entire structure of a folding device according to embodiment 2 of the present invention;

FIG. 13 is a partial view of a folding mechanism portion of embodiment 2;

fig. 14 is a state diagram of the folding device of embodiment 2 in which the folding member is driven to one of the retreat positions (the position of the folding member is about to enter the folding position);

fig. 15 is a state diagram in which the folding member is driven to the folded position in the folding apparatus of embodiment 2.

Detailed Description

Fig. 2 and 3 show an example of the disposable hygienic article folded by the folding device of the present invention, i.e., a pair of pull-ups S. The disposable sanitary article is not limited to the pull-up diaper, and can be disposable sanitary articles such as paper diaper, women sanitary pants and the like.

The pull-up diaper S comprises: an absorbent main body S1 for absorbing urine and an elastic waist S2 attached to the absorbent main body S1. The later-described folding apparatus 1 is used to fold the pull-up pants S along a folding line S3 provided at the center of the pull-up pants S in the longitudinal direction. In the present description, the folding line S3 is set at the center position in the longitudinal direction of the pull-up pants S as an example, but the folding line S3 may be set at any position of the disposable sanitary article in practical use. Fig. 3 shows the pull-up diaper S after being folded by the folding device 1. It should be noted that, in the process of folding the pull-up diaper S into fig. 3 from fig. 2, the folding of the elastic waistline S2 both sides of the pull-up diaper S is realized on the front section station flow of the folding device 1, not the folding device 1 of the present invention is formed by folding, the folding device 1 of the present invention folds the pull-up diaper S according to the folding line S3.

Example 1

Fig. 1 is a schematic diagram showing the overall configuration of a folding device according to embodiment 1 of the present invention. As shown in fig. 1, the folding device 1 of the present invention includes: a conveying mechanism 2 for conveying the pull-up diaper S; a folding mechanism 3 for folding the pull-up pants S conveyed by the conveying mechanism 2; a guide mechanism 4 for guiding the pull-up pants S to be in a posture in which the pull-up pants S are easily folded by the folding mechanism 3; and a support portion 5 that supports the conveying mechanism 2, the folding mechanism 3, and the guide mechanism 4.

The conveying mechanism 2 includes: a first belt assembly 6, a second belt assembly 7 for transporting the pull-up diaper S with the first belt assembly 6, a third belt assembly 8 for transporting the pull-up diaper S with the second belt assembly, a fourth belt assembly 9 for transporting the pull-up diaper S with the third belt assembly 8, and a fifth belt assembly 10 for transporting the pull-up diaper S with the fourth belt assembly 9.

The first belt assembly 6 includes: a first belt 6a and a plurality of first pulleys 6b to 6e for hanging the first belt 6a along an endless path. The first belt 6a is hung on the first pulleys 6b to 6e and has a portion arranged along a first path R1 parallel to the horizontal direction. Parallel here also includes the first path R1 being substantially parallel or substantially parallel to the horizontal.

The second belt assembly 7 includes: a second belt 7a and a plurality of second pulleys 7b to 7e for hanging the second belt 7a along an endless path. The second belt 7a has a portion arranged along the first path R1 and a portion arranged along the second path R2 inclined with respect to the first path R1 in a state of being hung on the second pulleys 7b to 7 e. Here, as shown in fig. 8, the second path R2 is a path extending from the terminal end of the first path R1 in a direction intersecting the first path R1. The angle formed by the second path R2 and a vertical line R12 perpendicular to the first path R1 is an inclination angle A.

Referring to fig. 1, the third belt assembly 8 includes: a third belt 8a and a plurality of third pulleys 8b to 8f for hanging the third belt 8a along an endless path. The third belt 8a has a portion arranged along the second path R2 and a portion arranged along the third path R3 inclined with respect to the second path R2 in a state of being hung from 8b to 8 f. Here, the third path R3 is parallel to the first path R1, and the parallel also includes the two being substantially parallel or substantially parallel. That is, the third path R3 is inclined at an angle C (angle a +90 °) with respect to the second path R2.

The fourth belt assembly 9 includes: a fourth belt 9a, and a plurality of fourth pulleys 9b to 9d for hanging the fourth belt 9a along a loop path. The fourth belt 9a has a portion arranged along the third path R3 while being hung on the fourth pulleys 9b to 9 d.

The fifth belt assembly 10 includes: a fifth belt 10a and a plurality of fifth pulleys 10b to 10d for hanging the fifth belt 10a along an endless path. The fifth belt 10a has a portion arranged along the third path R3 in a state of being hung on the fifth pulleys 10b to 10 d.

The first belt unit 6 and the second belt unit 7 constitute a first conveying unit 2A, and the first conveying unit 2A conveys the pull-up diaper S along the first path R1 with the pull-up diaper S sandwiched from both the front and back sides. Here, the lead-out port 11a is formed between the first belt assembly 6 and the second belt assembly 7 at a position corresponding to the end of the first path R1.

The second belt unit 7 and the third belt unit 8 constitute a second conveying unit 2B, and the second conveying unit 2B conveys the pull-up diaper S along the second path R2 from the introduction port 11B while sandwiching the pull-up diaper S from both the front and back sides. Here, between the second belt assembly 7 and the third belt assembly 8, the introduction port 11b is formed at a position corresponding to the start end of the second path R2, and the discharge port 11c is formed at a position corresponding to the end of the second path R2.

The third belt module 8, the fourth belt module 9, and the fifth belt module 10 constitute a third conveying section 2C, and the third conveying section 2C conveys the pull-ups S received from the second conveying section 2B along a third path R3. Here, since the fifth belt assembly 10 is disposed such that the extension line thereof intersects the second path R2, the third conveying section 2C can convey the pull-up diaper S guided from the outlet 11C of the second conveying section 2B from the inlet 11d along the third path R3. Thereby, the transport mechanism 2 transports the pull-up pants S along the first path R1, the second path R2, and the third path R3 in order.

Fig. 4 and 5 show a front view and a side view of the folding mechanism of the present embodiment, respectively. As is apparent from fig. 4 and 5, the folding mechanism 3 is for folding the training pants S between the exit 11a of the first conveyor 2A and the entrance 11B of the second conveyor 2B. Specifically, the folding mechanism 3 includes a folding member 18 for folding the pull-up diaper S and a driving mechanism 30 for driving the folding member 18 to reciprocate linearly in the direction of the second path R2.

The drive mechanism 30 includes: a servomotor 12 fixed to the support 5 by a fixing portion 11, a first pulley 13 connected to an output shaft of the servomotor 12 via a timing belt 15, and a second pulley 14 also fixed to the fixing portion 11 on a side away from the servomotor 12. Of course, the second pulley 14 may be directly driven by another servo motor which is not the servo motor 12, but only one servo motor 12 is illustrated in the embodiment. Specifically, the second pulley 14 is attached to the fixing portion 11 on the side away from the servomotor 12 via the support portion 16, and the second pulley 14 can also be adjusted in position vertically relative to the fixing portion 11 via the support portion 16 to tension the timing belt 15. The first pulley 13 and the second pulley 14 are linked together in an endless path by a timing belt 15. The synchronous belt is preferably a toothed belt, and correspondingly, a toothed belt wheel is also adopted as the belt wheel. Preferably, the core wire of the timing belt is made of a carbon fiber material to satisfy the lightweight property in a high-speed state. The driving mechanism 30 further includes guide wheels 21 provided on both sides of the width direction of the endless path on the side of the timing belt 15, and the two guide wheels 21 are attached to the fixing portion 11 through fixing seats for guiding the timing belt 15 to correct the skew in the linear reciprocating movement of the folding member 18.

In the present invention, in order to realize high speed folding, the driving motor 12 used in the driving mechanism 30 is not a normal motor, but a high-speed and low-inertia motor, and is suitable for high-frequency speed change and forward and reverse reciprocating motion.

The first pulley 13 and the second pulley 14 in the drive mechanism 30 are made of aluminum. The utility model discloses the band pulley that uses is less band pulley, and its number of teeth is less than 80, and the number of teeth of less band pulley is also less, and its quality is lighter, generally adopts the iron material, and the number of teeth is greater than 80 great band pulley just can adopt the aluminium material. The choice of pulley size will typically be bounded by, for example, 80 teeth. That is, the smaller belt wheel used in the present invention is made of aluminum instead of iron according to the conventional method. Because the density of aluminium material only has 1/3 of iron material, so the utility model discloses alleviateed synchronous pulley's weight greatly, improved the conveying precision, realized the lightweight, more be fit for the occasion of high-speed operation.

Furthermore, the present invention is provided with a material layered design for the synchronous belt 15 disposed along the annular path, for example, a high-strength Urethane Rubber (UR) is used as the main body, a carbon fiber material is used as the core wire, and a high-strength nylon canvas is used as the tooth portion. The middle core wire is made of carbon fiber materials so as to achieve light weight and meet high-speed operation.

As described above, the driving mechanism 30 differs from the conventional driving mechanism in the selection of each part involved in movement, material, and the like, and is lighter in weight, and particularly suitable for high-speed operation, thereby achieving rapid reciprocating linear movement. Meanwhile, the whole folding mechanism can not be abraded in high-speed operation due to the light design, and compared with the traditional transmission structure, the device is simpler and lower in cost.

The folding member 18 is connected to the drive mechanism 30, and specifically, the folding member 18 is fixed to the timing belt 15 (the side opposite to the guide wheel 21). According to the above configuration, in the case where the servo motor 12 is rotated forward and backward in the driving mechanism 30, the folding member 18 is linearly moved downward and upward. When the servomotor 12 rotates clockwise, the first pulley 13 also rotates clockwise, the folding member 18 moves linearly downward to reach the folding position, and the pull-up pants S fed out from the outlet 11a are folded by pushing a part of the folding member 18 into the inlet 11b in the direction of the second path R2, and the folded pull-up pants S are guided to the position inside the inlet 11b, thereby bringing the state shown in fig. 10. When the servomotor 12 rotates counterclockwise, the first pulley 13 also rotates counterclockwise, the folding member 18 moves linearly upward to reach the retracted position, and after the folding member 18 moves linearly in the opposite direction along the direction of the second path R2, the folding member 18 is moved away from the position of the introduction port 11b, and the state shown in fig. 8 is obtained.

The folding mechanism 3 further comprises a linkage member 17 disposed inside the timing belt 15 and connected to the folding member 18, wherein the linkage member 17 is connected to the timing belt 15, and therefore, a tooth profile matching the tooth profile of the timing belt 15 is also provided on the side of the linkage member 17 connected to the timing belt 15, as shown in fig. 4 and 6. The folding member 18 is connected to the timing belt 15 by a link 17. The link 17 is also mounted with a sensed portion 27 that can be sensed by a sensor described later.

In the present invention, the link 17 has a tooth shape corresponding to the tooth shape of the timing belt 15 on a surface facing the timing belt 15, and the link 17 is coupled to the timing belt 15 through the tooth shape and fixed to the folding member 18 through the timing belt 15. That is, the folding member 18 is fixed to the timing belt 15 by the tooth form of the link 17 and moves back and forth following the servo motor 12. General screw connection can produce not hard up when reciprocating high-speed operation, and the utility model discloses the connection that folding part 18 and hold-in range 15 can be guaranteed to the driven mode that matches of profile of tooth that adopts is the complete fixed at high-speed reciprocating motion, can not produce under high-speed because fixed insecure and the not hard up that produces, thereby can not cause the skew of folding part 18 self can guarantee high-speed driven stability, and then can the position of accurate control folding part 18.

Further, since the folding member 18 and the timing belt 15 are integrally formed by completely fixing the folding member 18 and the timing belt 15 together by the link 17, the folding member 18 and the timing belt 15 as a whole are moved up and down when the servo motor 12 is rotated in the normal direction or in the reverse direction, and thus, abrasion is not generated.

Fig. 7 shows the installation relationship and structure of the link 17 and the folding member 18, with the timing belt 15 therebetween not shown. As shown in fig. 7, the folding member 18 has a Y-shaped plate-like structure including an attaching portion 18a and a folding portion 18b, and the width of the attaching portion 18a attached to the timing belt is smaller than the width of the folding portion 18b for pushing into the introduction port 11b to fold the training pants S. The width of the fold 18b is at least greater than the width 1/2 of the pull-up pant S, and preferably not less than the width of the pull-up pant S as a whole. Of course, the width of the folded portion 18b cannot be too large in order to satisfy the requirement of light weight. Preferably, the width of the fold 18b is greater than the width of the pull-up pant S and less than 1.5 times the width of the pull-up pant S.

Since the folding member 18 has a Y-shaped plate-like structure, the width of the folding portion 18b which is brought into contact with the pull-up diaper S and folded is set to be wider in order to prevent the folding member 18 from being shaken at a high speed during the high-frequency reciprocating motion, and the dynamic balance of the folding member 18 can be ensured. The mounting portion of the folding member 18 is formed with a long waist hole structure, which facilitates the adjustment of the position of the folding member 18 relative to the timing belt 15 in the same direction or the opposite direction to the second path R2, and also facilitates the adjustment of the different sizes of the pull-ups S during folding.

As shown in fig. 5, the folding mechanism 3 further includes a plurality of rollers 20 disposed on a side of the folding member 18 away from the tooth form of the timing belt 15 for engaging the folding member 18 to reciprocate linearly. The rollers 20 are arranged in two sets, each set including a plurality of rollers. The specific number of rollers 20 may be determined according to the length and width of the folding member 18, and the two sets of rollers 20 are fixed to the fixing portion 11 by the plate member 19. The rollers 20 are in a tangential relationship with the folding members 18 to allow for rolling, which allows the folding members 18 to operate more smoothly and smoothly at high speeds.

Fig. 11 is a perspective view of the folding mechanism 3. The positional relationship and the connection relationship of the servomotor 12, the first and second pulleys 13 and 14, the timing belt 15, the link 17, the folding member 18, and the roller 20 can be visually seen from this figure.

The folding mechanism 3 further comprises a first sensor 24, a second sensor 25 and a third sensor 26 mounted on the plate member 19 via a bend 28. The first sensor 24 is used to detect the lower limit position of the folding member 18. The second sensor 25 is used to detect the upper limit position of the folding member 18. The third sensor 26 is used to detect the home position of the folding member 18. As shown in fig. 1 and 10, when the pull-up pants S are to be folded, the sensed portion 27 of the link 17 moves in the direction of the second path R2 with the timing belt 15 until the folding position is reached, by the clockwise driving of the servo motor 12, at which time the servo motor 12 stops rotating. The first sensor 24 is disposed at a lower limit position slightly downstream of the second path R2 from the folded position, and normally the sensing portion 27 stops when reaching the folded position and is not detected by the first sensor 24. If the first sensor 24 detects the sensed part 27, it indicates that the sensed part 27 has passed the lower limit position, and the detection signal of the first sensor 24 is used as an alarm signal to trigger the servo motor 12 to stop. As shown in fig. 1 and 8, when the training pants S are folded, the servo motor 12 rotates counterclockwise, and the sensing member 27 on the link 17 moves in the direction opposite to the direction of the second path R2 along with the timing belt 15 until the retracted position is reached, at which time the servo motor 12 stops rotating. The second sensor 25 is provided at an upper limit position slightly distant from the second path R2 from the retracted position, and normally the sensing part 27 stops when reaching the retracted position and is not detected by the second sensor 25. If the second sensor 25 detects the sensed part 27, it indicates that the sensed part 27 has passed the upper limit position, and the detection signal of the second sensor 25 is used as an alarm signal to trigger the servo motor 12 to stop. As shown in fig. 1 and 4, when the device is restarted or the folding mechanism 3 needs to be reset again, the sensed part 27 on the linkage 17 moves along the direction of the second path R2 or the opposite direction along with the timing belt 15 until the third sensor 26 detects that the folding part 18 in the folding mechanism 3 returns to the initial setting position. In which direction the sensed member 27 moves depends on the position of the folding member 18 prior to resetting.

The driving mechanism 30 is switched between the folding position and the retracted position, and the control method thereof may be a synchronization signal method of an encoder or a cam curve method. When the synchronous signal control mode of the encoder is adopted, the values of the starting synchronous signals of the folding position and the retreat position are respectively set in the control system, the values of the synchronous signals corresponding to the disposable sanitary products with different sizes are different, and when the folding device 1 receives the value of the starting synchronous signal of the folding position, the folding part 18 moves linearly downwards, namely, moves to the folding position when the starting servo motor 12 rotates clockwise. In accordance with the running speed of the production apparatus, while the folding line S3 of the pull-up diaper S sent out from the outlet 11a reaches the inlet 11b of the second path R2, a part of the folding means 18 is pressed into the inlet 11b in the direction of the second path R2, thereby folding the pull-up diaper S and guiding the folded pull-up diaper S to a position inside the inlet 11 b. The degree of pressing of a part of the folding member 18 into the introduction port 11b can be adjusted according to the size of the actual product. When the pull-up pants S are folded, and the folding device 1 receives the value of the retreat position start synchronization signal, the servo motor 12 is started to rotate counterclockwise, the folding member 18 moves linearly upward, that is, to the retreat position, and after the folding member 18 moves linearly in the direction opposite to the direction of the second path, the folding member is separated from the position of the introduction port 11 b. In order to synchronize the folding mechanism 3 with the overall step of the folding device 1, a cam curve control method can be used, and a designed curve matched with the product size is introduced into the control system, so that the servo motor 12 runs according to the motion track of the curve completely, and the servo motor 12 is changed in speed during the folding process. In actual operation, the control mode can be set according to requirements. The control mode of adopting the cam curve is more accurate and simpler than the synchronous signal control mode of the traditional encoder, but the cam curve is more complicated to design, and the curve matched with the product size is different because the disposable sanitary product of different sizes is folded, namely, one size product corresponds to one cam curve.

In addition, the folding mechanism 3 further includes an adjusting portion 22 for adjusting the position of the entire mechanism in the direction perpendicular to the second path R2 and a protecting cover 23 attached to the front end of the mechanism.

Fig. 8 and 9 show partial views of the folding device 1. As shown in fig. 8 and 9, the guide mechanism 4 includes: an L-shaped plate 41 fixed to the support portion 5 via a first mounting portion 42, a cover member 44 fixed to the support portion 5 via a second mounting portion 45, and a direction changing member 43 fixed to the L-shaped plate 41. The covering member 44 is located above the direction changing member 43. The L-shaped plate 41 is inclined upward at an angle B with respect to an extension line R11 of the first path R1, and is disposed along an inclined line R13 extending from the terminal end of the first path R1, that is, an angle formed by the extension line R11 and the inclined line R13 is an angle B.

The L-shaped plate 41 includes: an inclined portion 41a fixed to the first mounting portion 42 along an inclined line R13, and a bent portion 41b extending from an upper end portion of the inclined portion 41a so as to intersect with the inclined line R13.

The direction changing member 43 is fixed to the inclined portion 41a, and includes: a first changing surface 43a that changes the moving direction of the distal end portion of the pull-up diaper S by coming into contact with the distal end portion of the pull-up diaper S led out from the outlet 11a of the first conveying unit 2A; and a support surface 43b extending from the upper end of the first changing surface 43a along the inclined line R13 and supporting the pull-up diaper S from below, as shown in fig. 9.

The pull-up pants S having their base end portions sandwiched from the front and back sides by the first conveying section 2A formed by the first belt module 6 and the second belt module 7 and led out from the outlet port 11a have their tip end portions guided by the first changing surface 43a in a direction away from the second conveying section 2B formed by the second belt module 7 and the third belt module 8 with reference to an extension line R11 of the first path R1. In order to realize such a function, the distance between the first changing surface 43a and the outlet 11a is set to be shorter than the entire length of the pull-up pants S. The first conversion surface 43a is a curved surface inclined upward from an extension line R11 (leftward direction in fig. 8) of the first path R1, and intersects the extension line R11. Therefore, the tip end portion of the pull-up pants S led out from the lead-out opening 11a contacts the first changing surface 43a, and is guided to the upper side of the extension line R11 of the first path R1, i.e., the opposite side of the first belt module 6 and the second belt module 7, as shown in fig. 9. Further, the distal end portion of the pants S guided to the upper side of the extension line R11 is supported by the support surface 43b, and the distal end portion of the pants S is arranged in the direction of the inclined line R13, whereby the bent portion W is formed in the pants S positioned outside the introduction port 11 b.

As shown in fig. 8, the covering member 44 covers the direction changing member 43 from above. Specifically, the cover member 44 is a plate member that is fixed to the support portion 5 by the second mounting portion 45, and the support portion 5 is movable in a direction perpendicular to the inclination line R13 to adjust the distance of the cover member 44 relative to the direction change member 43. The cover member 44 further includes a second changing surface 44a for changing the moving direction of the front end portion of the pull-up pants S by contacting the front end portion of the pull-up pants S led out from the outlet 11a of the first carrying section 2A, and is bent so as to be away from the direction changing member 43, so that the front end portion of the pull-up pants S can enter between the cover member 44 and the direction changing member 43 along the inclined line R13, thereby facilitating the folding of the folding mechanism 3. The second changing surface 44a is located at the position of the outlet 11a, and the folding mechanism 3 is located at the position of the outlet 11a of the first conveying section 2A and above the second changing surface 44 a.

In the present embodiment, the position of the folding member 18 is detected using the sensed portion 27 and the first sensor 24, the second sensor 25, and the third sensor 26. However, the present invention is not limited to this, and the position of the folding member 18 may be detected from the rotation angle of the rotation shaft of the servo motor 12, for example.

Example 2

Compared with embodiment 1, the present embodiment is different in the conveying mechanism 2 'and the guide stopper mechanism 4'. Fig. 12 is a schematic view of the entire structure of the folding device of embodiment 2. As shown in fig. 12, the conveying mechanism 2' of the present embodiment, like embodiment 1, includes: a first belt assembly 6 ', a second belt assembly 7 ' conveying the pull-up pant S between the first belt assembly 6 ', a third belt assembly 8 conveying the pull-up pant S between the second belt assembly, a fourth belt assembly 9 conveying the pull-up pant S between the third belt assembly 8 and a fifth belt assembly 10 conveying the pull-up pant S between the fourth belt assembly 9.

Wherein the first belt assembly 6' different from embodiment 1 includes: the first belt 6a 'and a plurality of first pulleys 6 b' to 6f 'for hanging the first belt 6 a' along the endless path. As shown in fig. 12, the portion of the first belt 6a ' between the first pulleys 6d ' and 6E ' is not along the first path R1 ', but is disposed obliquely at an angle E to the first path R1 '. This is arranged obliquely in such a way that the pull-up pant S opens an opening for introduction at the first path R1' into the most upstream side of the folding device 1, thereby ensuring that the front end of the pull-up pant S can be introduced into the folding device 1 more easily. The first belt 6a ' has a portion arranged along the first path R1 ' perpendicular to the folding member 18 of the folding device 3 in a state of being hung on the first pulleys 6b ' to 6f ', that is, as shown in fig. 13, an angle D formed by the first path R1 ' and the folding member 18 is 90 °. Perpendicular, as used herein, also includes the first path R1' being substantially perpendicular or substantially perpendicular to the folding member 18. An extension line R13 'extending along the first path R1' is a straight line when the training pants S are folded at the folding position at the entrance 11 b. Since the first path R1' is perpendicular to the folding member 18, folding the pull-up diaper S in a straight state from the perpendicular direction is more advantageous. Such a state is shown in fig. 14.

The reason why folding the pull-up pants S in a straight state from the vertical direction is advantageous will be described below. First, before entering the folding device 1 of the present invention, the disposable sanitary products (pull-ups S in this embodiment) are already formed and arranged side by side, i.e. the disposable sanitary products are discontinuous. Secondly, since the disposable sanitary product is a sheet-like fabric which is formed by compounding a plurality of non-woven fabrics and the like and has certain softness, the disposable sanitary product is different from paper and other objects with certain hardness, and the disposable sanitary product can be influenced by the installation angle of the device in the conveying process. For example, in example 1, since the leading end of the disposable sanitary article enters the direction changing member 43 of the guide mechanism 4 after passing through the first path R1 and is bonded thereto, and the first path R1 and the direction changing member 43 are not on the same horizontal line and have a certain angle, the disposable sanitary article is flexible, and when the leading end of the disposable sanitary article enters the direction changing member 43 of the guide mechanism 4, the leading end is not likely to change its trajectory and is likely to be wrinkled or not stretched, and after being folded by the folding device, a state in which the folded disposable sanitary article is folded asymmetrically, that is, the disposable sanitary article is long while two edges are not aligned, is caused. In the case of embodiment 2, since the first path R1 ' and the direction changing member 43 of the guide stopper mechanism 4 ' are on the same horizontal line, the product "lies straight" on the first path R1 ' and the direction changing member 43, and thus the above-mentioned asymmetric folding can be avoided or at least improved.

In embodiment 2, a guide and stopper mechanism 4 'is different from embodiment 1, and as shown in fig. 13, the guide and stopper mechanism 4' includes: an L-shaped plate 41 fixed to the support portion 5 via the first mounting portion 42, a direction changing member 43 and a bracket 44 'fixed to the L-shaped plate 41, and a stopper 45'. The L-shaped plate 41 is disposed in parallel with an extension line R13 'of the first path R1'.

The L-shaped plate 41 includes: an inclined portion 41a fixed to the first mounting portion 42 along an extension line R13 ' of the first path R1 ', and a bent portion 41b extending from an upper end portion of the inclined portion 41a so as to cross the extension line R13 '.

The direction changing member 43 is fixed to the inclined portion 41 a. The direction conversion member 43 includes: a first changing surface 43a that changes the moving direction of the distal end portion of the pull-up diaper S by coming into contact with the distal end portion of the pull-up diaper S led out from the outlet 11a of the first conveying unit 2A; and a support surface 43b extending from the upper end of the first changing surface 43a along an extension line R13' and supporting the pull-up diaper S from below.

The bracket 44' includes: an attached portion 44a ' connected to the bent portion 41b of the L-shaped plate 41, and a third attached portion 44b ' perpendicular to the attached portion 44a ', and a position of the attached portion 44a ' facing the introduction port 11b, that is, the bracket 44 ' is also fixed to the bent portion 41b of the L-shaped plate 41 in an L-shaped configuration.

The stopper 45 ' includes an adjustment mounting portion 45a ' and a contact portion 45b '. The stopper 45 ' is adjustably mounted to the bracket 44 ', and specifically, the adjustment mounting portion 45a ' is connected to the third mounting portion 44b ' of the bracket 44 '. The adjustment attachment portion 45a ' and the contact portion 45b ' are L-shaped bent, and the contact portion 45b ' is bent toward the position of the direction changing member 43. The adjustment mounting portion 45 a' may be formed with a long waist hole. Before the training pants S are folded at the introduction port 11b, the contact portion 45 b' comes into contact with the front end position of the training pants S to limit the front end position of the training pants S. The position of the waist hole of the adjusting installation part 45a 'on the adjusting limiting part 45' corresponds to the front end position of the pull-up diaper S with different sizes. Thus, for example, if the length of the pull-up diaper S is changed from M to L, the position of the stopper 45' away from the folding mechanism 3 is adjusted to correspond to the length of the L-size pull-up diaper S.

Fig. 14 is a diagram showing a state in which the folding member in the folding device of the present embodiment is driven to one of the retracted positions. In this position, the folding member is about to enter the folded position but has not yet been moved, as in the state of embodiment 1 shown in fig. 9.

Fig. 15 shows a state in which the folding member 18 is driven to the folded position in the folding device 1 of the present embodiment. As shown in fig. 15, the pull-up pants S fed out from the inlet 11b are folded by pushing a part of the folding member 18 into the inlet 11b in the direction of the second path R2, and the folded pull-up pants S are guided to a position inside the inlet 11b, thereby reaching the folded position.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, without departing from the principle and the basis of the present invention, several improvements, decorations, combinations of replacing steps, etc. may be made, and these improvements, decorations, combinations of replacing steps, etc. should also be the protection scope of the present invention.

Claims (16)

1. A folding device for disposable hygienic articles, comprising:

a first transport unit that transports the disposable hygienic article along a first path in a state where the disposable hygienic article is sandwiched from front and rear sides, and that has a lead-out port provided at a terminal end of the first path;

a second transport unit that transports the disposable sanitary article from a terminal end of the first path along a second path extending in a direction intersecting the first path while sandwiching the disposable sanitary article from front and back sides, and that has an inlet provided at a leading end of the second path;

a folding mechanism having a folding member for folding the disposable hygienic articles between the first and second transport portions;

a drive mechanism connected to the folding member and configured to drive the folding member by reciprocating linear motion in a direction of a second path between a folding position at which the disposable hygienic article fed out from the outlet is folded by pushing a part of the folding member into the inlet in the direction of the second path and to guide the folded disposable hygienic article into the inlet, and a retracted position at which the folding member is detached from the inlet after the folding member is linearly moved in a direction opposite to the second path; and

a guide mechanism that guides the distal end portion of the disposable sanitary article, which is led out from the outlet port, to the opposite side of the second transport unit in the extension direction of the first path or with reference to the extension line of the first path in a state where the proximal end portion of the disposable sanitary article is sandwiched by the first transport unit from the front and back sides,

the driving mechanism is a structure that at least one belt wheel directly connects with a servo motor and a synchronous belt is hung on the periphery of the belt wheel according to a ring-shaped path.

2. The folding device for disposable hygienic articles according to claim 1,

the synchronous belt is a toothed belt, and the belt wheel is a toothed belt wheel.

3. The folding device for disposable hygienic articles according to claim 1 or 2,

the core wire of the synchronous belt is made of carbon fiber.

4. The folding device for disposable hygienic articles according to claim 1 or 2,

the driving mechanism further comprises guide wheels which are respectively arranged on two sides of one side of the synchronous belt on the annular path in the width direction and used for correcting and guiding the synchronous belt in the linear reciprocating motion of the folding component.

5. The folding device for disposable hygienic articles according to claim 3,

the driving mechanism further comprises guide wheels which are respectively arranged on two sides of one side of the synchronous belt on the annular path in the width direction and used for correcting and guiding the synchronous belt in the linear reciprocating motion of the folding component.

6. The folding device for disposable hygienic articles according to claim 2,

the folding mechanism also comprises a plurality of rollers which are arranged on one side of the folding component far away from the tooth form of the synchronous belt and are used for matching the folding component to do linear reciprocating motion,

the roller rolls tangentially to the folding component.

7. The folding device for disposable hygienic articles according to claim 1 or 2,

the folding mechanism is also provided with a linkage piece which connects the synchronous belt with the folding component.

8. The folding device for disposable hygienic articles according to claim 3,

the folding mechanism is also provided with a linkage piece which connects the synchronous belt with the folding component.

9. The folding device for disposable hygienic articles according to claim 7,

the linkage piece is also provided with a sensed part,

the folding mechanism is also provided with a first sensor, a second sensor and a third sensor which can detect the position of the folding component through a sensed part,

the first sensor is used for detecting the lower limit position of the folding component,

the second sensor is for detecting an upper limit position of the folding member,

the third sensor is used for detecting an origin return position of the folding component.

10. The folding device for disposable hygienic articles according to claim 8,

the linkage piece is also provided with a sensed part,

the folding mechanism is also provided with a first sensor, a second sensor and a third sensor which can detect the position of the folding component through a sensed part,

the first sensor is used for detecting the lower limit position of the folding component,

the second sensor is for detecting an upper limit position of the folding member,

the third sensor is used for detecting an origin return position of the folding component.

11. The folding device for disposable hygienic articles according to claim 1 or 2,

the folding component is in a Y-shaped plate structure and comprises a mounting part attached to the synchronous belt and a folding part pressed into the lead-in port to fold the disposable sanitary product,

the width of the mounting portion is smaller than the width of the folded portion.

12. The folding device for disposable hygienic articles according to claim 3,

the folding component is in a Y-shaped plate structure and comprises a mounting part attached to the synchronous belt and a folding part pressed into the lead-in port to fold the disposable sanitary product,

the width of the mounting portion is smaller than the width of the folded portion.

13. The folding device for disposable hygienic articles according to claim 1 or 2,

the drive mechanism is switched between the folding position and the retracted position and is controlled by a synchronization signal of an encoder or a cam curve.

14. The folding device for disposable hygienic articles according to claim 3,

the drive mechanism is switched between the folding position and the retracted position and is controlled by a synchronization signal of an encoder or a cam curve.

15. The folding device for disposable hygienic articles according to claim 1 or 2,

the second path is perpendicular to the first path,

the disposable hygienic article is folded by the folding member in a flat state.

16. The folding device for disposable hygienic articles according to claim 3,

the second path is perpendicular to the first path,

the disposable hygienic article is folded by the folding member in a flat state.

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