CN211658512U

CN211658512U - Elastic material's curve adds device

Info

Publication number: CN211658512U
Application number: CN201922447634.2U
Authority: CN
Inventors: 方安江; 龚志龙; 李大柱
Original assignee: Huangshan Futian Precision Manufacturing Co Ltd
Current assignee: Huangshan Futian Precision Manufacturing Co Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-10-13
Anticipated expiration: 2029-12-30

Abstract

The utility model discloses a curve adding device for elastic materials, which comprises an installation frame and at least one set of guide part, wherein the guide part comprises a servo motor, an internal gear, an external gear, a first connecting rod, a second connecting rod, a guide rail, a slide block and a thread guide; the inner gear is fixed on the mounting rack, and the first connecting rod rotates around the center of the inner gear; the outer gear is connected with the first connecting rod through a rotary pair, the outer gear and the inner gear perform meshing motion, one end of the second connecting rod is connected with the outer gear through the rotary pair, and the other end of the second connecting rod is connected with the sliding block through the rotary pair; the thread guide is fixed on the sliding block. The utility model discloses a planetary gear-connecting rod-slider combined mechanism scheme can make the slider produce anticipated variable motion through servo motor's at the uniform velocity gyration, can be applicable to 800 and give other care of 1000 ppm/min's high-speed production operating mode, and has the phase stability in the high-speed production, the curve shape is stable, the good advantage of dynamic balance characteristic.

Description

Elastic material's curve adds device

Technical Field

The utility model belongs to the pull-up diaper manufacturing field, in particular to a technology for adding elastic material in an extension state to a fabric to form a specific curve.

Background

With the continuous development of the field of disposable sanitary products, various sanitary products gradually come into the visual field of people, and the development of the downstream field directly stimulates and drives the vigorous development of the field of upstream sanitary equipment. High-speed and non-adhesive are two major development trends in the field of current sanitary equipment, wherein the non-adhesive aims to replace hot melt adhesive by an ultrasonic technology so as to improve the environmental protection and safety requirements of products, and the high-speed aims to design and develop a thousand-chip machine with the concentration of 800 plus one 1000ppm/min so as to improve the downstream capacity. The curve adding device of elastic materials is used as a common device in the field of sanitary equipment and has wide application in the production of products such as baby pull-ups and the like. The traditional curve adding device generally adopts a driving mechanism to drive a yarn guide fixed on a transmission belt, and realizes curve addition of elastic materials through reciprocating linear motion of the yarn guide, but tests prove that the structure can only meet the production working condition of 500 plus materials 600 ppm/min.

An apparatus for manufacturing a disposable wearing article described in Japanese patent laid-open publication No. 2003-38565, comprising: a pair of press rollers for nipping the two sheet bodies in a state where the elastic member is sandwiched between the pair of sheet bodies conveyed in the longitudinal direction; a guide member provided upstream of the pair of press rollers in the conveying direction of the two sheet bodies, and configured to send out the elastic member in the longitudinal direction thereof and guide the elastic member between the two sheet bodies; and a drive mechanism for driving the guide member so as to change the position of the elastic member relative to the two sheet bodies. Although the above patent can change the position of the elastic member along the axial direction of the pair of press rolls by moving the guide member, and can clamp and press the elastic member between the two sheet bodies, this structure has the disadvantages of poor rigidity and poor dynamic balance, and cannot be applied to the current demand for high-speed development.

Therefore, the curve adding device of the elastic material becomes a big problem restricting the promotion of the high-speed project of the sanitary equipment.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems, the utility model provides an elastic material's curve adds device solves the above-mentioned problem that traditional device exists, and has good dynamic balance nature, can satisfy high-speed production operating mode.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a curve adding apparatus for an elastic material, for adding a stretched elastic material to a fabric to form a specific curve, comprising: a mounting frame and at least one set of guide members. The guide part comprises a servo motor, an internal gear, an external gear, a first connecting rod, a second connecting rod, a guide rail, a sliding block and a thread guide. Wherein, the internal gear is fixed on the mounting frame, and the extension line of the guide rail passes through the center of the internal gear; the first connecting rod rotates around the center of the internal gear and is connected with the servo motor; the external gear is connected with the first connecting rod through a rotary pair, and the external gear and the internal gear perform meshing motion, so that the external gear revolves relative to the center of the internal gear and rotates relative to the first connecting rod. One end of the second connecting rod is connected with the outer gear through a rotary pair, and the other end of the second connecting rod is connected with the sliding block through a rotary pair; the thread guide is fixed on the sliding block, and the sliding block can move linearly along the guide rail in a reciprocating way.

The term "fabric" as used herein refers to a planar film, nonwoven fabric or other fibrous article. In addition, the "elastic material" refers to a material having elasticity, such as an elastic band, which can improve the contractibility of the fabric in a state of being fixed to one surface of the fabric while being kept in a stretched state.

When the two-layer fabric interlayer elastic material is in work, the first connecting rod generates rotary motion under the driving of the servo motor, the external gear generates rotation and revolution motion under the action of the first connecting rod, the second connecting rod drives the sliding block under the action of the external gear to enable the sliding block to do linear reciprocating motion on the guide rail, the speed of the sliding block is accelerated, decelerated and stopped in the reciprocating stroke, and then the elastic material is driven to generate the same motion, so that the curve-shaped elastic material is formed in the two-layer fabric interlayer.

Further, the gear ratio of the internal gear to the external gear is 4:1, that is, the external gear revolves around the center of the internal gear for 1 cycle and rotates relative to the first link for 4 cycles. Preferably, the pitch circle diameter of the outer gear ranges from 40mm to 90 mm.

Furthermore, the center of the revolute pair connected with the second connecting rod and the external gear does not coincide with the center of the external gear. Preferably, the distance between the two is 5mm-12 mm.

Furthermore, a counterweight gear for reducing the vibration of the device is further arranged on the first connecting rod, and the counterweight gear is connected with the first connecting rod through a rotary pair.

Further, the length range of the second connecting rod is 350mm-550 mm.

Furthermore, the guide members are provided in two sets and are arranged diagonally on the mounting frame to complete the formation of two curved elastic materials on the fabric.

Compared with the prior art, the utility model, have following advantage:

the utility model adopts the proposal of the planetary gear-connecting rod-sliding block combined mechanism, and the sliding block can generate the expected variable speed motion through the uniform rotation of the servo motor. The utility model discloses have good dynamic balance characteristic, can be applicable to 800 supplyes one's material 1000 ppm/min's high-speed production operating mode, the servo motor who has solved present trade adoption takes pendulum rod variable speed swing, servo motor to take crank connecting rod variable speed gyration, servo motor to take hold-in range variable speed gyration scheme, the ubiquitous bottleneck problem that restriction equipment speed raising such as motor performance is not enough, the rubber band curve warp under the high-speed production operating mode. The speed change rule of the sliding block is ensured by a pure mechanical structure, and the sliding block has the advantages of stable phase and stable curve shape in high-speed production.

Drawings

Fig. 1 is a schematic diagram of the present invention.

Fig. 2 is a schematic diagram of the present invention when the first connecting rod and the second connecting rod are collinear.

FIG. 3 is a phase diagram of the first link angle versus slider displacement. Wherein the abscissa X represents that the rotation angle of the first connecting rod is 0-360 degrees, and the ordinate Y represents the displacement H (unit: mm) of the corresponding slide block.

Fig. 4 is a schematic structural diagram of the present invention according to another embodiment.

Fig. 5 is a usage state diagram of the present invention.

Detailed Description

The present invention will be described with reference to the drawings and the detailed description.

In the embodiment of the method, the first step,

referring to fig. 1 to 5, a curve adding device 100 for elastic material is used to transport stretched elastic threads 101 in a reciprocating direction of a pressing roller 102, so that the elastic threads 101 and two fabrics 103 enter the pressing roller 102 at the same time, thereby forming leg-surrounding elastic threads with a special curve shape between the two fabrics 103. The curve adding apparatus 100 for elastic material includes: a mounting frame 104 and two sets of guide elements 105 arranged opposite each other on the mounting frame.

The guide member 105 includes a servo motor, an internal gear 1, an external gear 2, a first link 3, a second link 4, a guide rail 5, a slider 6, and a thread guide 7.

Specifically, the internal gear 1 is fixed to the mounting frame, and the extension line of the guide rail 5 passes through the center O1 of the internal gear 1.

The first link 3 rotates around the inner gear center O1 and is connected to a servo motor. The pitch circle diameter of the outer gear 2 ranges from 40mm to 90 mm. The external gear 2 is connected with the first connecting rod 3 by a rotation pair, and the external gear 2 and the internal gear 1 perform meshing motion, so that the external gear 2 revolves relative to the center of the internal gear 1 and rotates relative to the first connecting rod 3. The gear ratio of the internal gear 1 to the external gear 2 is 4:1, that is, the external gear revolves around the center of the internal gear for 1 cycle and rotates on the first link for 4 cycles.

One end of the second link 4 is coupled to the external gear 2 by a rotary pair, and the other end is coupled to the slider 6 by a rotary pair. The length of the second link 4 ranges from 350mm to 550 mm. The centre O2 of the revolute pair connected with the second connecting rod 4 and the external gear 2 is not coincident with the centre O3 of the external gear, and the distance R2 between the centre O2 and the centre O3 is 5mm-12 mm. As shown in fig. 2, a dotted line portion L is a planar motion trajectory of the second link and the external gear connecting the center of the revolute pair, a distance R1 between the center O1 of the internal gear and the center O3 of the external gear, a distance R2 between the center O2 of the revolute pair connected to the second link 4 and the external gear 2 and the center O3 of the external gear, and a motion stroke H of the slider is 2 (R1-R2).

The thread guide 7 is fixed on a slide block 6, and the slide block 6 can reciprocate linearly along the guide rail 5. Since no improvement is made on the specific structure of the wire guide 7, those skilled in the art can refer to the chinese patents 201510944502.4 and 201720795841.5 previously filed by the applicant for understanding the specific structure of the wire guide 7, and details thereof are not repeated herein.

The first connecting rod 3 is provided with two external gears, one of which is connected in the manner described above, and the other of which serves as a counterweight to reduce vibration during operation of the device, and which are coupled to the first connecting rod by means of a rotary pair as well.

The above description and the drawings only show the preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can appreciate that the technical solutions and the inventive concepts of the present invention can be equally replaced or changed within the technical scope of the present invention.

Claims

1. A curve adding device for elastic material, which is used for adding stretched elastic material to a fabric to form a specific curve, characterized in that: comprises a mounting frame and at least one set of guide components; the guide part comprises a servo motor, an internal gear, an external gear, a first connecting rod, a second connecting rod, a guide rail, a sliding block and a thread guide; the inner gear is fixed on the mounting rack, and the extension line of the guide rail passes through the center of the inner gear; the first connecting rod rotates around the center of the inner gear and is connected with the servo motor; the outer gear is connected with the first connecting rod through a rotary pair, the outer gear and the inner gear perform meshing motion, one end of the second connecting rod is connected with the outer gear through the rotary pair, and the other end of the second connecting rod is connected with the sliding block through the rotary pair; the thread guide is fixed on the sliding block, and the sliding block can move linearly along the guide rail in a reciprocating way.

2. The curve adding device for elastic material according to claim 1, wherein: the gear ratio of the internal gear to the external gear is 4: 1.

3. The curve adding device for elastic material according to claim 1, wherein: the center of the revolute pair connected with the second connecting rod and the outer gear does not coincide with the circle center of the outer gear.

4. The curve adding device for elastic material according to claim 1, wherein: and the first connecting rod is also provided with a counterweight gear for reducing the vibration of the device, and the counterweight gear is connected with the first connecting rod by adopting a rotary pair.

5. The curve adding device for elastic material according to claim 1, wherein: the diameter range of the pitch circle of the outer gear is 40mm-90 mm.

6. The curve adding device for elastic material according to claim 1, wherein: the length range of the second connecting rod is 350mm-550 mm.

7. A curve adding device for elastic material according to claim 3, wherein: the offset distance between the center of the revolute pair connected with the second connecting rod and the outer gear and the center of the outer gear is 5-12 mm.

8. The curve adding device for elastic material according to claim 1, wherein: when the fabric interlayer bending machine works, the first connecting rod generates rotary motion under the driving of the servo motor, the external gear generates rotation and revolution motion under the action of the first connecting rod, the second connecting rod moves the sliding block under the action of the external gear, so that the sliding block linearly reciprocates on the guide rail, the speed of the sliding block is accelerated, decelerated and stopped in the reciprocating stroke, and then the elastic material is driven to generate the same motion, so that the curve-shaped elastic material is formed in the two fabric interlayers.

9. Curve adding device for elastic materials according to any one of claims 1 to 8, characterized in that: the guide parts are provided with two groups and are arranged diagonally on the installation rack.