CN209798270U - sewing machine bottom line detection device - Google Patents

Abstract

the utility model discloses a sewing machine bottom line detection device, include: the shuttle comprises a shuttle core, the shuttle core comprises a winding post and end plates arranged at two ends of the winding post, and the winding post is a stepped shaft; the light reflecting piece is arranged on at least one shaft section on the winding post; the photoelectric sensor comprises an emitter and a receiver, wherein the emitter is used for emitting a detection light beam to the winding post, and the receiver is used for receiving a reflected light beam of the detection light beam reflected by the reflector. In this sewing machine bottom thread detection device, because have different shaft segments on the wrapping post, can directly distinguish the region of wrapping post according to the structure of wrapping post, butt joint department between the shaft segment can carry out the boundary to the wrapping post, can distinguish the winding position of bottom thread to control the bottom thread more conveniently and reserve length, can facilitate for making other work of in-process, be favorable to improving whole efficiency of making up.

Description

Sewing machine bottom line detection device

Technical Field

The utility model relates to a sewing machine technical field, in particular to sewing machine bottom line detection device.

background

A sewing machine is a machine that uses one or more sewing threads to form one or more stitches in a material to be sewn, thereby interweaving or stitching one or more layers of material. At present, a lock stitch sewing machine is widely used in the clothing manufacturing industry, and is sewing equipment which enables a bottom thread and a surface thread to be interlocked in a sewing material by matching a rotating shuttle with a machine needle so as to realize lock stitches.

The bobbin needs to be replaced in time under the conditions of bottom thread exhaustion, thread breakage and the like. However, because the bobbin accommodating amount for placing the bobbin thread is not large, generally only dozens of meters, the bobbin replacing frequency is high, and the bobbin thread is difficult to be timely replaced due to the fact that an operator can hardly observe the bobbin thread by naked eyes, the risk that the bobbin thread is scrapped due to the fact that the seam material is empty sewn or even the seam material is damaged, or the bobbin thread is required to be additionally installed for needle repairing, and the like exists, the sewing quality is affected, and the production efficiency is reduced.

In order to facilitate judgment of the condition of the bobbin thread, the chinese utility model patent application specification CN103334241A discloses a bobbin thread monitoring device for a sewing machine, wherein the sewing machine comprises a bottom plate and a rotating shuttle mounted on the bottom plate, the rotating shuttle comprises a bobbin case and a bobbin, a winding post of the bobbin is completely accommodated in the bobbin case, a reflective surface is arranged on the winding post of the bobbin, and a light hole is formed on the side wall of the bobbin case; the bottom plate is provided with a photoelectric sensor which is positioned on the outer side of the shuttle shell, the photoelectric sensor is composed of a receiver and a transmitter, and the receiver and the transmitter are opposite to the light hole. The operating principle of the bobbin thread monitoring device for the sewing machine is that when the bobbin thread is running out, the reflective surface on the bobbin winding post can be gradually exposed, so that the signal received by the receiver changes, and whether the bobbin thread is used up or not is judged.

However, the above-described bobbin thread monitor for a sewing machine cannot control the reserved length of the bobbin thread. When the reflective surface is used, the bottom line is wound on the winding post and covers the reflective piece, and when the receiver receives the reflected light beam of the reflective surface for the first time, the length of the remaining bottom line on the winding post is the reserved length. Because the winding positions of the bobbin cores on the bottom thread are not distinguished, the bottom thread is usually unevenly distributed on the bobbin winding post, the reserved length is difficult to control, inconvenience is brought to next work such as preparation of a new bobbin core, and sewing efficiency is greatly reduced.

Therefore, how to more conveniently control the reserved length of the bottom line is a technical problem that needs to be solved by those skilled in the art at present.

SUMMERY OF THE UTILITY MODEL

in view of this, the present invention provides a bottom thread detecting device for a sewing machine, which can control the reserved length of the bottom thread more conveniently.

In order to achieve the above object, the utility model provides a following technical scheme:

A sewing machine bobbin thread detecting apparatus comprising:

The shuttle comprises a shuttle core, the shuttle core comprises a winding post and end plates arranged at two ends of the winding post, and the winding post is a stepped shaft;

The light reflecting piece is arranged on at least one shaft section on the winding post;

and the photoelectric sensor comprises a transmitter and a receiver, the transmitter is used for transmitting a detection light beam to the winding post, and the receiver is used for receiving a reflected light beam of the detection light beam reflected by the reflector.

Preferably, a partition board is formed in the axial middle of the winding post in a protruding manner, two grooves are formed in the winding post on two sides of the partition board respectively, and at least one of the grooves is provided with the light reflecting piece.

Preferably, the partition board is of an annular structure with a notch, the partition board and the winding post are coaxially arranged, the light reflecting piece is arranged at the notch of the partition board, and the light reflecting piece extends into the two grooves.

Preferably, the axial length of one of said grooves is less than the axial length of the other of said grooves.

preferably, the winding post includes a small diameter portion provided at an axial middle portion and large diameter portions provided at both axial sides of the small diameter portion.

Preferably, the reflector is disposed on the large diameter portion.

Preferably, a light transmission hole is formed in the end plate, so that the detection light beam and/or the reflected light beam can pass through the shuttle.

Preferably, at least one of the end plates is provided with distinguishing holes, and the distinguishing holes on the two end plates are different in number.

Preferably, the reflector is made of a retroreflective material.

Preferably, the sewing machine bottom line detection device further comprises:

the air blowing device is provided with an air outlet facing to the transmitter and/or the receiver of the photoelectric sensor;

And the blowing device is connected to the air source.

The utility model provides a sewing machine bottom line detection device, include: the shuttle comprises a shuttle core, the shuttle core comprises a winding post and end plates arranged at two ends of the winding post, and the winding post is a stepped shaft; the light reflecting piece is arranged on at least one shaft section on the winding post; the photoelectric sensor comprises an emitter and a receiver, wherein the emitter is used for emitting a detection light beam to the winding post, and the receiver is used for receiving a reflected light beam of the detection light beam reflected by the reflector.

In this sewing machine bottom thread detection device, because have different shaft segments on the wrapping post, can directly distinguish the region of wrapping post according to the structure of wrapping post, butt joint department between the shaft segment can carry out the boundary to the wrapping post, can distinguish the winding position of bottom thread to control the bottom thread more conveniently and reserve length, can facilitate for making other work of in-process, be favorable to improving whole efficiency of making up.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic structural view of a first embodiment of a bobbin thread detecting device of a sewing machine according to the present invention;

FIG. 2 is a schematic view of a photoelectric sensor according to a first embodiment of the present invention;

FIG. 3 is a structural diagram of a bobbin according to a first embodiment of the bobbin thread detecting device of the present invention;

FIG. 4 is a front view of a bobbin in a first embodiment of the bobbin thread detecting device of the present invention;

FIG. 5 is a sectional view taken along line A-A of FIG. 4;

FIG. 6 is a top view of a bobbin according to a first embodiment of the bobbin detecting device of the present invention;

FIG. 7 is a front view of a bobbin in a second embodiment of the bobbin thread detecting device of the present invention;

FIG. 8 is a view showing a structure of a bobbin in the third embodiment of the bobbin thread detecting device of the present invention;

FIG. 9 is a top view of a bobbin in a third embodiment of the bobbin thread detecting device of the present invention;

FIG. 10 is a sectional view taken along line B-B of FIG. 9;

Fig. 11 is a front view of the bobbin in the second embodiment of the bobbin thread detecting device of the sewing machine according to the present invention.

In fig. 1 to 11:

1-photoelectric sensor, 11-detection beam, 2-rotating shuttle, 21-bobbin core, 22-end plate, 23-winding column, 24-clapboard, 25-groove, 26-light hole, 27-small diameter part, 28-large diameter part, 29-bottom line reserved part, 210-first groove, 211-second groove, 212-distinguishing hole, 3-bottom plate, 4-controller, 5-blowing device, 51-pressing plate, 52-air pipe and 6-reflecting piece.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The core of the utility model is to provide a sewing machine bottom line detection device, can control the bottom line more conveniently and reserve length.

In the description of the present invention, it should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

in the first embodiment of the bobbin thread detecting device of the sewing machine of the present invention, please refer to fig. 1 to 6, which includes a shuttle, a reflector 6 and a photoelectric sensor 1. The detection device can be particularly applied to a template machine or other sewing equipment. The shuttle can be in particular a rotating shuttle 2 or a shuttle cock.

The shuttle comprises a bobbin 21, the bobbin 21 comprises a winding post 23 and end plates 22 arranged at two ends of the winding post 23, and the winding post 23 is a stepped shaft. Wherein, the stepped shaft means that there are at least two shaft sections of the winding post 23 in the axial direction. Where a shaft segment refers to the portion of the winding leg 23 between adjacent shoulders or the portion of the end plate 22 and the shoulder axially closest to the end plate 22. Typically, the radial dimensions of adjacent shaft segments are different. Each shaft section is preferably a cylinder or a torus, and particularly, as shown in fig. 4, the winding post 23 has three shaft sections.

The reflector 6 is arranged on the winding post 23, and the reflector 6 is arranged on at least one shaft section on the winding post 23.

The photosensor 1 includes a transmitter and a receiver. The transmitter is used for transmitting the detection beam 11 to the winding post 23, and the receiver is used for receiving a reflected beam of the detection beam 11 after being reflected by the reflector 6.

in the using process, during winding, a shaft section can be set as the bottom line reserved part 29 firstly, the bottom line is wound around the bottom line reserved part 29 firstly, after the bottom line with the reserved length is wound on the part, the rest bottom line is wound according to the preset winding direction, so that when the light beam is reflected into the receiver for the first time by the light reflecting piece 6 exposed for the first time, the length of the rest bottom line on the winding column 23 is at least the reserved length.

In this sewing machine bottom thread detection device, because have different shaft segments on the wrapping post 23, can directly distinguish the region of wrapping post 23 according to the structure of wrapping post 23, butt joint department between the shaft segment can carry out the boundary to wrapping post 23, can distinguish the winding position of bottom thread to control the bottom thread more conveniently and reserve length, can facilitate for making other work of in-process, be favorable to improving whole efficiency of making up.

According to specific use requirements, when the receiver receives a reflected light beam for the first time, the bottom line at least at the remaining bottom line reserved part 29 on the winding post 23 can be specifically realized, at the moment, a signal of the receiver at the moment can be used as a reminding signal of the near-end use of the bottom line, convenience can be provided for other work in the sewing process, and the improvement of the whole sewing efficiency is facilitated. For example, after the receiver receives the reflected light beam for the first time, the controller 4 electrically connected to the photoelectric sensor 1 can send out a reminding signal to remind when receiving the signal of the photoelectric sensor 1, and at this time, remind the user to prepare a spare bobbin in advance, and shorten the bobbin replacing time. For another example, after the receiver receives the reflected beam for the first time, because the length of the residual bobbin thread on the winding post 23 is at least the length reserved for the bobbin thread, the receiver can remind the user before finishing the current sewing thread, which is beneficial to reducing the wiring operation, and the signal of the receiver can play a role in early warning, so that most of requirements of clients of the template machine can be met.

Furthermore, a partition plate 24 is formed by projecting the axial middle part of the winding post 23, two grooves 25 are respectively formed on the winding post 23 at two sides of the partition plate 24, and at least one of the grooves 25 is provided with the light reflecting member 6.

Referring to fig. 4, the partition 24 divides the groove-shaped structure formed between the winding post 23 and the end plate 22 into two parts, a first groove 210 is formed between one end plate 22 and the partition 24, the first groove 210 serves as the bottom line reserving portion 29, a second groove 211 is formed between the other end plate 22 and the partition 24, and the light reflecting member 6 is disposed in the second groove 211. When the bobbin thread is wound, assuming that the bobbin thread is wound from the first groove 210 first, the partition 24 will stop the bobbin thread in the first groove 210, and after the first groove 210 is wound with the bobbin thread, the bobbin thread is wound to the second groove 211 on the other side, and finally the bobbin 21 is wound completely.

When the sewing operation is performed, the bobbin 21 bottom thread is gradually exhausted, the bottom thread of the second groove 211 is consumed first, then the reflective member 6 in the second groove 211 is exposed, and after the receiver receives the reflected light of the reflective member 6 in the second groove 211, the controller knows that the bottom thread is about to be used up. At this time, the length of the bobbin thread not consumed by the first groove 210 is the reserved length of the bobbin thread, the remaining amount of the bobbin thread at this time is used for meeting the requirement that the current thread is sewn by the template machine, and then the machine is stopped to remind a user that the bobbin thread is used up and the bobbin 21 needs to be replaced.

By providing the partition 24 in the middle of the bobbin 21 winding post 23, the bobbin 21 winding post 23 is partially divided into two areas, which facilitates processing, and the positions of the bobbin thread on the winding post can be clearly distinguished.

Further, as shown in fig. 4, the partition 24 is a ring structure having a notch, the partition 24 is disposed coaxially with the winding post 23, the light reflecting member 6 is disposed at the notch of the partition 24, and the light reflecting member 6 extends into the two grooves 25.

The height of the partition 24 radially protruding out of the rest of the winding post 23 can define the volume of the groove, and further define the reserved length of the bottom line, and the height value can be specifically set according to actual needs.

optionally, two notches of the partition 24 may be provided, and are separated by 180 degrees, and correspondingly, one light reflecting member 6 is correspondingly provided on each notch.

The axial lengths of the two grooves 25 can be set according to actual needs, and specifically can be the same, and can also be one large or one small.

The partition plate 24 is formed in a ring shape, and the effect of dividing the base line can be ensured. In addition, the reflector is arranged on the notch, which is beneficial to ensuring the reliable positioning of the reflector 6. In addition, after the bobbin thread is completely used up, the part of the light reflecting member 6 in the bobbin thread reserve part 29 is exposed and reflects the light beam to the receiver, and the bobbin thread can be judged to be completely used up based on the signal from the receiver.

Further, the end plate 22 is provided with a light-transmitting hole 26 for the detection beam 11 and/or the reflected beam to pass through the shuttle. In addition, at least one of the end plates 22 is provided with the distinguishing hole 212, and the number of the distinguishing holes 212 on the two end plates 22 is different, and it should be noted that the case where the distinguishing hole 212 is provided on one of the end plates 22 and the other end plate 22 is not provided with the distinguishing hole 212 also belongs to the protection scope of the present application.

As shown in fig. 3, two light-transmitting holes 26 and two distinguishing holes 212 are provided in one end plate 22, and two light-transmitting holes 26 and no distinguishing hole 212 are provided in the other end plate 22.

By distinguishing the end plates 22 having different numbers of holes 212, it is possible to quickly distinguish which of the two grooves 25 is the groove serving as the bobbin-thread reserve 29, to further facilitate determination of the start position of the winding.

Of course, in other embodiments, the number of the distinguishing holes 212 on the two end plates 22 may be the same, and in addition, the two grooves 25 may be assisted to be distinguished by marking the end plates 22, the partition plates 24, the winding posts 23 and the like with dots or by drawing a pattern.

Furthermore, the reflecting piece 6 is made of a retro-reflecting material, and forms a retro-reflecting photoelectric sensing assembly with the photoelectric sensor, so that debugging is facilitated. Of course, the light-reflecting member 6 may also be a diffuse reflection paper, which forms a diffuse reflection photoelectric sensing assembly with the photoelectric sensor, and at this time, the first time the light beam is reflected into the receiver by the first exposed light-reflecting member 6 should be set to a time when the combined light returns to the receiver enough to make the state of the photoelectric sensor change for the first time.

Further, the sewing machine bottom line detection device also comprises a blowing device 5 and an air source. The air outlet of the air blowing device 5 faces the transmitter and/or the receiver of the photoelectric sensor 1. The blowing device 5 is connected to a gas source.

This gas blowing device 5 can clear up the debris of the mouth of giving out light and/or receiving the light of photoelectric sensor 1, prevents that photoelectric sensor 1 from blockking up because of the line hair and malfunctioning, is favorable to improving photoelectric sensor 1's stability of performance, and clearance convenient operation, the clearance process does not basically have the influence to photoelectric sensor 1's normal operating, can clear up in photoelectric sensor 1 operation. In addition, when the air source is applied to sewing equipment such as a template machine with the air source, the air source can directly utilize the air source originally arranged in the sewing equipment, for example, the air source can be an air pump in the template machine, namely, the air blowing device 5 is directly additionally arranged on the existing machine, the structure is simple, and the installation is convenient.

Further, the air blowing device 5 may include an air tube 52 and a pressing plate 51, the air tube 52 is connected to the air source, and the air tube 52 is sandwiched between the bottom plate 3 and the pressing plate 51.

The air pipe 52 is clamped by the bottom plate 3 and the pressure plate 51 to fix the air pipe 52, so that the installation is convenient, and the flexibility of selecting the position of the air pipe 521 is increased.

further, the air tube 52 includes a flexible tube and a rigid tube connected to one end of the flexible tube, the free end of the flexible tube is connected to the air source, and the free end of the rigid tube serves as an air outlet for facilitating the positioning of the air outlet.

Furthermore, the blowing device 5 can be connected with an air valve for controlling the air on-off condition of the blowing device, the air valve is electrically connected with the controller 4 of the sewing machine, and the opening and closing of the air valve and the sewing process are controlled in a unified manner through the controller 4 of the sewing machine.

during assembly, the air source can be an air source originally configured in a sewing machine such as a template machine and the like, only the hose needs to be led, then the air is aligned to the sensor light-emitting port and the irradiation path thereof through one or more hard pipes, the air valve is controlled through the controller 4, air blowing cleaning is carried out when sewing is stopped every time, and sundries on the sensor light-emitting port and the light beam path thereof are cleaned. This cover clearance structure part is few, simple structure, only needs the clamp plate 51 and the screw that add an trachea 52 in addition and fixed trachea 52 to realize the clearance, simple to operate, and in addition, the sensor position is convenient for adjust.

Further, as shown in fig. 1, the sensor mounting plate is fixed to the plane of the sewing machine base by screws. The photoelectric sensor 1 is fixed on the sensor mounting plate by screws. For the path of the detection beam 11, the detection beam 11 emitted by the emitter can pass through the gap between the shuttle support and the ox horn after sequentially passing through the through hole on the sewing machine bottom shell and the through hole on the shuttle bed, then pass through the light transmission hole 26 on the end plate 22, and finally be irradiated on the light reflecting piece 6 on the winding post 23. The path of the reflected beam is in the opposite direction to the path of the detection beam 11.

in the second embodiment of the device for detecting the bobbin thread of the sewing machine of the present invention, referring to fig. 7, on the basis of the first embodiment, for the grooves 25 on both sides of the partition plate 24, the axial length of one groove 25 is smaller than the axial length of the other groove 25.

Because the ratio of the reserved length of the bottom line to the total length of the bottom line is usually small, the capacities of the two grooves 25 can be obviously distinguished through the offset arrangement of the partition plate 24, so that the actual setting requirement of the reserved length of the bottom line is met more, and the reserved length of the bottom line can be controlled more accurately. Wherein the groove 25 having a small axial length may serve as the bobbin thread reserve 29. In addition, in the present embodiment, the grooves 25 may be distinguished by their axial lengths, and the number of distinguishing holes 212 on the two end plates 22 may be set to be the same.

Obviously, the arrangement of the winding posts 23 is not limited to that provided in the above-described respective embodiments. In the third embodiment of the bottom thread detecting device of the sewing machine of the present invention, please refer to fig. 8 to 11, the winding post 23 includes a small diameter portion 27 disposed at the middle of the axial direction and a large diameter portion 28 disposed at both sides of the axial direction of the small diameter portion 27, and the small diameter portion 27 is generally disposed as a bottom thread reserving portion 29.

Note that, the two large diameter portions 28 and the small diameter portion 27 have the smallest radial dimension of the small diameter portion 27, and the two large diameter portions 28 have the larger radial dimension than the small diameter portion 27, but the two large diameter portions 28 may have the same radial dimension or different radial dimensions. The large diameter portion 28 and the small diameter portion 27 are preferably cylindrical.

It should be noted that, when the bobbin thread is wound, the bobbin thread may be wound on the small diameter portion 27 and then cover the large diameter portions 28 on both sides. Depending on the total amount of bobbin thread, both large diameter portions 28 may be covered by the bobbin thread after the end of the winding, or only one of the large diameter portions 28 may be covered by the bobbin thread. In addition, with respect to the separator 24 in the first embodiment and the second embodiment, after the winding is completed, the separator 24 may not be covered with the bobbin thread, and may be covered with the bobbin thread.

With the winding post 23 in this embodiment, the position of the shaft section provided as the bobbin thread reserve part 29 can be distinguished more easily without considering the area of the start position of the winding.

Further, the light reflecting member 6 is provided on the large diameter portion 28. That is, the small diameter portion 27 is not provided with the reflector 6.

In particular, a mounting, in particular a mounting groove or a mounting plane, can be provided on the large-diameter portion 28, in which mounting the light reflector 6 is provided. The mounting portion is specifically configured to match with the position of the light hole 26, so as to ensure that the light beam can irradiate the winding post 23 through the light hole 26.

The provision of the reflector 6 on the large diameter portion 28 further ensures that the receiver is a reflected beam which is received with a base line on the small diameter portion 27.

the embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The above details are provided for the bottom line detection device of the sewing machine provided by the utility model. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (10)

1. A sewing machine bottom line detection device is characterized by comprising:

the shuttle comprises a shuttle core (21), the shuttle core (21) comprises a winding post (23) and end plates (22) arranged at two ends of the winding post (23), and the winding post (23) is a stepped shaft;

The reflecting piece (6) is arranged on at least one shaft section on the winding post (23);

The photoelectric sensor (1) comprises a transmitter and a receiver, wherein the transmitter is used for transmitting a detection light beam (11) to the winding post (23), and the receiver is used for receiving a reflected light beam of the detection light beam (11) reflected by the light reflecting piece (6).

2. the bobbin thread detecting device of the sewing machine according to claim 1, wherein the bobbin thread (23) protrudes axially at a middle portion thereof to form a partition (24), and grooves (25) are formed in the bobbin thread (23) on both sides of the partition (24), at least one of the grooves (25) being provided with the light reflecting member (6).

3. the bobbin thread detecting device according to claim 2, wherein the partition (24) is a ring-shaped structure having a gap, the partition (24) is disposed coaxially with the winding post (23), the reflector (6) is disposed at the gap of the partition (24), and the reflector (6) extends into the two grooves (25).

4. Sewing machine bottom line detection device according to claim 2, characterized in that the axial length of one of said grooves (25) is smaller than the axial length of the other groove (25).

5. the lower thread detecting device of a sewing machine according to claim 1, wherein the winding post (23) includes a small diameter portion (27) provided at a middle portion in an axial direction and large diameter portions (28) provided at both sides in the axial direction of the small diameter portion (27).

6. Sewing machine bottom line detection device according to claim 5, characterized in that said reflection element (6) is provided on said large diameter portion (28).

7. Sewing machine bottom line detection device according to any one of claims 1 to 6, characterized in that said end plate (22) is provided with a light-transmitting hole (26) for the detection light beam (11) and/or the reflected light beam to pass through the shuttle.

8. the sewing machine bottom line detecting device according to any one of claims 1 to 6, wherein at least one of the end plates (22) is provided with a distinguishing hole (212), and the distinguishing holes (212) are different in number in the two end plates (22).

9. Sewing machine bottom line detection device according to any of claims 1 to 6, characterized in that the reflector (6) is made of a retroreflective material.

10. The sewing machine lower thread detecting device according to any one of claims 1 to 6, further comprising:

The air blowing device (5) has an air outlet facing to the transmitter and/or the receiver of the photoelectric sensor (1);

the air blowing device (5) is connected to the air source.