TWI783259B - Debris collection device for sewing machine and negative pressure joint thereof - Google Patents

Abstract

A negative pressure joint includes a first barrel, a second barrel and a negative pressure generation structure. The first barrel includes a intake tube and a sleeve. The sleeve having a cavity and an intake hole with connected to the cavity. The second barrel includes an adapting pipe and a outlet tube. The adapting pipe is corresponding the sleeve combination. The negative pressure generation structure is set in the cavity and includes a first ring and a second ring with which it is docked. An intake trough is formed between the first ring and the second ring and connected the cavity and the adapting pipe. After a gas enters the cavity from the intake hole, it will flow through the intake trough in sequence and the inside of the adapting pipe and flow out of the outlet tube, thus forming a negative pressure channel inside the intake tube.

Description

Sewing machine debris collection device and its negative pressure joint

The invention relates to a sewing machine technology, in particular to a sewing machine debris collection device and its negative pressure joint.

Cocker sewing machines will produce a lot of cloth waste and thread scraps during the sewing operation. If these cloth scraps and thread ends fall into or remain in the machine, they will entangle the parts inside the sewing machine, which will not only affect the The normal operation of the sewing machine will even shorten the service life of the sewing machine. In order to solve the aforementioned problems, the industry has successively developed various debris collection devices for sewing machines.

Existing scrap collection devices of kock sewing machines generally have insufficient suction power, especially for thicker cloth scraps and/or thread ends and other scraps, which often cannot be sucked away. In order to solve this problem, users The problem is to increase the amount of gas entering the air intake hole. The increased amount of gas in this way not only produces a greater noise value, but also causes a large loss of gas and electrical energy.

In view of this, the present inventor aimed at the above-mentioned deficiencies in the prior art, devoted himself to research and combined with the application of theories, and tried his best to solve the above-mentioned problems, which became the goal of the inventor's improvement.

An object of the present invention is to provide a debris collection device for a sewing machine and its negative pressure joint, which can reduce the energy loss caused by the gas hitting the wall, and thus greatly improve the suction force of the negative pressure channel.

In order to achieve the above object, the present invention provides a debris collection device for sewing machines, which includes an air delivery mechanism, a cloth scrap delivery mechanism, a thread scrap delivery mechanism, and a collection bag. The air delivery mechanism includes an air pressure source, respectively connected to the A first air pipe and a second air pipe of the air pressure source; the cloth dust conveying mechanism includes a hopper, a first feed pipe, a negative pressure joint and a second feed pipe, and the negative pressure joint includes a The first cylinder part and a second cylinder part, the first cylinder part includes an air inlet pipe and an air inlet hole, the second cylinder part includes an air outlet pipe, and the two ends of the first feeding pipe are respectively connected to the falling hopper and the air inlet pipe of the first cylinder, the first air pipe is connected to the air inlet of the first cylinder; the wire scrap conveying mechanism includes a wire end shearing extractor, a first wire pipe, a Another negative pressure connector and a second pipeline, the other negative pressure connector includes another first cylinder part and another second cylinder part, the other first cylinder part includes an air inlet pipe and an air inlet pipe The air hole, the other second cylinder part includes an air outlet pipe, the two ends of the first line pipe are respectively connected to the thread end shear extractor and the air inlet pipe of the other first cylinder part, the second air supply pipe The trachea is connected to the air inlet of the other first barrel; the two ends of the second delivery pipe are respectively connected to the air outlet of the second barrel and the collection bag, and the two ends of the second delivery pipe are Respectively connect the air outlet pipe and the collection bag of the other second cylinder.

In order to achieve the above object, the present invention provides a negative pressure connector, which is connected to a gas, and includes a first cylinder, a second cylinder and a negative pressure generating structure. A sleeve for the extension of the trachea has a cavity inside the sleeve, and an air intake hole communicating with the cavity is opened on the sleeve; the second cylinder part includes a receiving tube and extends from the receiving tube An air outlet pipe, the receiving pipe is combined with the sleeve; the negative pressure generating structure is arranged in the cavity, and the negative pressure generating structure includes a first ring extending from the sleeve and communicating with the air inlet pipe and a second ring body extending from the receiving pipe and communicating with the air outlet pipe, the first ring body and the second ring body are butted with each other, and a The cavity is connected with at least one air intake slot inside the receiving pipe; wherein the gas enters the cavity from the air intake hole, then flows through the air intake slot and the inside of the receiving tube in sequence, and flows from the outlet pipe flow out, thereby forming a negative pressure channel inside the air inlet pipe.

The present invention also has the following effects. With the butt joint of the first ring body and the second ring body and the setting of the air inlet groove, the gas will be fully guided to the air inlet groove after entering the cavity and then from the inside of the receiving pipe. And the outlet pipe flows out, which can greatly reduce the high noise generated by the gas hitting the inner wall. The tapered hole inside the receiving pipe is used to set the incoming gas to be quickly brought out from the tapered hole after being accelerated by the speed-increasing section.

The detailed description and technical content of the present invention are described below with the drawings, but the attached drawings are only for reference and description, and are not used to limit the present invention.

Referring to FIGS. 1 to 5 , the present invention provides a negative pressure joint. The negative pressure joint 1 mainly includes a first cylinder 10 , a second cylinder 20 and a negative pressure generating structure 30 .

The first barrel 10 is made of plastic and other materials, and mainly includes an air inlet pipe 11 and a sleeve 12. A plurality of protruding rings 111 are arranged at intervals on the outer peripheral surface of the air inlet pipe 11. Inside the air inlet pipe 11, there is a inner hole 112 . The sleeve 12 extends from the end of the air inlet pipe 11 , has a cavity 121 inside the sleeve 12 , and defines an air inlet 122 communicating with the cavity 121 in the sleeve 12 .

The second cylindrical member 20 is also made of materials such as plastic, and mainly includes a receiving pipe 21 and an air outlet pipe 22 extending from the receiving pipe 21. The receiving pipe 21 is a combination of the sleeve 12 corresponding to the first cylindrical member 10, A retaining ring 211 is formed on the outside of the receiving pipe 21, and a tapered hole 212 is provided inside the receiving pipe 21. The inner diameter of the tapered hole 212 at the end adjacent to the air outlet pipe 22 is larger than the inner diameter of the end far away from the air outlet pipe 22. diameter, and an inner angle A is formed between the center line of the receiving pipe 21 and the wall surface of the tapered hole 212, the angle of the inner angle A is between 6°~26°, preferably between 12°~20° , the optimal angle is 16°, when the inner angle A is less than 6° and greater than 26°, it will affect the flow velocity of the internal gas. In addition, there is an inner hole 221 inside the air outlet pipe 22 .

The negative pressure generating structure 30 is disposed in the cavity 121, and mainly includes a first ring body 31 extending from the sleeve 12 and a second ring body 32 extending from the receiving pipe 21, the first ring body 31 and the second ring body The bodies 32 are mutually butted, and between the first ring body 31 and the second ring body 32, at least one air intake groove 33 communicating with the cavity 121 and the inside of the receiving pipe 21 is provided. In this embodiment, the number of air intake grooves 33 is for three.

The inside of the first ring body 31 communicates with the inner hole 112 of the air inlet pipe 11 , and the outside of the first ring body 31 is formed with a tapered surface 311 . The inner front end of the second ring body 32 has a set of interface 321 and a gas speed-up section 322 extending from the sleeve interface 321. The rear end is connected to the aforementioned tapered hole 212 , and an inclined tapered surface 323 is also formed on the outside of the second ring body 32 .

To further illustrate, the air inlet pipe 11 has a center line L1, the sleeve 12 shares the center line L1 of the air inlet pipe 11, the air outlet pipe 22 also has a center line L2, and the receiving pipe 21 shares the center line L2 of the air outlet pipe 22. The extension of the central line L1 of the air pipe 11 coincides with the central line L2 of the air outlet pipe 22 . Moreover, the air inlet 122 also has a centerline L3, and the extension of the centerline L3 of the air inlet 122 is perpendicular to the centerline L1 of the air inlet pipe 11 .

Please refer to Fig. 6, the present invention also provides a sewing machine debris collection device, which can be applied to a koke sewing machine 8. Chip conveying mechanism 60 and a collection bag 70.

The air delivery mechanism 40 mainly includes an air pressure source 41 , a first air delivery pipe 42 and a second air delivery pipe 43 , and one end of the first air delivery pipe 42 and the second air delivery pipe 43 are respectively connected to the air pressure source 41 .

The cloth scrap conveying mechanism 50 mainly includes a feeding hopper 51, a first feeding pipe 52, a negative pressure joint 1 and a second feeding pipe 53. The cut cloth scraps fall in, the two ends of the first feeding pipe 52 are respectively connected to the feeding hopper 51 and the air inlet pipe 11 of the first barrel 10, and the two ends of the second feeding pipe 53 are respectively connected to the second barrel 20 The air outlet pipe 22 and the collection bag 70 , the end of the first air delivery pipe 42 far away from the air pressure source 41 is connected to the air inlet 122 of the first barrel 10 .

The thread scrap conveying mechanism 60 mainly includes a thread end shearing extractor 61, a first line pipe 62, another negative pressure joint 1 and a second line pipe 63, and the thread end shear extractor 61 is installed in the On the sewing platform of the gram sewing machine 8, it is used to inhale the thread ends and cut the thread ends. The air pipe 11 and the two ends of the second delivery pipe 63 are respectively connected to the air outlet pipe 22 and the collection bag 70 of the other second tube 20 , and the end of the second air delivery tube 43 away from the air pressure source 41 is connected to the other first tube 10 The air intake hole 122.

Further, the air delivery mechanism 40 of this embodiment also includes two adjustment valves 44, one of which is to connect the first air delivery pipe 42 and the air inlet 122 of the first barrel 10, and the other adjustment valve 44 is to The second air delivery pipe 43 is connected to the air inlet 122 of the other first cylinder 10 so as to adjust the corresponding flow rate according to the actual usage requirement.

Please refer to Fig. 4 again. After the gas enters the cavity 121 from the air inlet 122 during use, it will flow through the air inlet grooves 33 and the inside of the receiving pipe 21 in sequence, and then flow through the inner hole of the air outlet pipe 22. 221 flows out, thereby forming a negative pressure channel B inside the air inlet pipe 11, and this negative pressure channel B can transport the aforementioned cloth scraps and thread ends to the collection bag through each material delivery pipe 52, 53 and each line delivery pipe 62, 63 Within 70.

To sum up, the debris collection device and its negative pressure joint of the sewing machine of the present invention can indeed achieve the expected purpose of use, and solve the lack of conventional knowledge, and because of its novelty and progress, it fully meets the requirements of the invention patent application. †The application is filed in accordance with the Patent Law. Please check carefully and grant the patent of this case to protect the rights of the inventor.

1: Negative pressure connector

10: The first cylinder

11: Inlet pipe

111: convex ring

112: inner hole

12: Sleeve

121: cavity

122: air intake

20: The second barrel

21: take over the tube

211: retaining ring

212: tapered hole

22: Outlet pipe

221: inner hole

30: Negative pressure generating structure

31: The first ring body

311: oblique cone

32: Second ring body

321:Socket

322: gas speed up section

323: oblique cone

33: Air intake slot

A: Inner angle

B: negative pressure channel

L1, L2, L3: center line

40: gas transmission mechanism

41: Air pressure source

42: The first air pipe

43: The second air pipe

50: Cloth scrap conveying mechanism

51: Blanking hopper

52: The first delivery pipe

53: Second delivery pipe

60: Wire chip conveying mechanism

61: thread cut extractor

62: The first pipeline

63: Second pipeline

70: collection bag

8: Cocker sewing machine

Fig. 1 is a three-dimensional exploded view of the negative pressure joint of the present invention.

Fig. 2 is a three-dimensional appearance view of the first cylinder of the present invention.

Fig. 3 is the combined appearance diagram of the negative pressure joint of the present invention.

Fig. 4 is a combined sectional view of the negative pressure joint of the present invention.

Fig. 5 is a sectional view of 5-5 in Fig. 4 .

Fig. 6 is a combined schematic diagram of the application of the debris collection device of the present invention to a sewing machine.

1: Negative pressure connector

10: The first cylinder

11: Inlet pipe

111: convex ring

112: inner hole

12: Sleeve

121: cavity

122: air intake

20: The second barrel

21: take over the tube

211: retaining ring

212: tapered hole

22: Outlet pipe

221: inner hole

30: Negative pressure generating structure

31: The first ring body

311: oblique cone

32: Second ring body

321:Socket

322: gas speed up section

323: oblique cone

33: Air intake slot

A: Inner angle

B: negative pressure channel

L1, L2, L3: center line

Claims (12)

A negative pressure joint connected to a gas, comprising: A first cylindrical member, including an air inlet pipe and a sleeve extending from the air inlet pipe, having a cavity inside the sleeve, and an air inlet opening communicating with the cavity in the sleeve; A second cylindrical member, including a receiving pipe and an air outlet pipe extending from the receiving pipe, the receiving pipe is corresponding to the sleeve assembly; and A negative pressure generating structure is arranged in the cavity, and the negative pressure generating structure includes a first ring extending from the sleeve and communicating with the air inlet pipe and a first ring extending from the receiving pipe and communicating with the air outlet pipe The second ring body, the first ring body and the second ring body are butted with each other, and at least one air inlet connecting the cavity and the inside of the receiving pipe is provided between the first ring body and the second ring body groove; Wherein, after the gas enters the cavity from the air inlet, it will flow through the air inlet groove and the inside of the receiving pipe in sequence, and then flow out from the air outlet pipe, thereby forming a negative pressure channel inside the air inlet pipe. The negative pressure joint according to claim 1, wherein the air inlet pipe has a centerline, and the air outlet pipe also has a centerline, and the extension of the centerline of the air inlet pipe coincides with the centerline of the air outlet pipe. The negative pressure joint according to claim 2, wherein the air inlet also has a centerline, and the extension of the centerline of the air inlet is perpendicular to the centerline of the air inlet pipe. The negative pressure joint according to claim 1, wherein a tapered hole is provided inside the receiving pipe, and the inner diameter of the tapered hole at the end adjacent to the air outlet pipe is larger than the inner diameter at the end far away from the air outlet pipe. The negative pressure joint as described in claim 4, wherein the receiving pipe has a centerline, and an inner angle is formed between the centerline of the receiving pipe and the wall surface of the tapered hole, and the angle of the inner included angle is between 6°~ between 26°. The negative pressure joint as described in Claim 5, wherein the angle of the inner angle is between 12°~20°. The negative pressure joint as described in Claim 6, wherein the inner angle is 16°. The negative pressure joint as described in claim 4, wherein the second ring body has a set of ports and a gas speed-up section extending backward from the set of ports, the socket is sleeved on the first ring body, and the gas The rear end of the speed-increasing section is connected with the tapered hole. The negative pressure joint according to claim 1, wherein a retaining ring for retaining the sleeve is formed on the outside of the receiving pipe. The negative pressure joint as claimed in claim 1, wherein an oblique cone surface is formed on the outside of the first ring body, and the air inlet groove is arranged on the oblique cone surface. A debris collection device for a sewing machine, comprising: an air conveying mechanism, including an air pressure source, a first air conveying pipe and a second air conveying pipe respectively connected to the air pressure source; a cloth waste conveying mechanism, including a hopper, a A first feed pipe, a negative pressure joint as described in any one of Claims 1 to 10, and a second feed pipe, the two ends of the first feed pipe are respectively connected to the drop hopper and the first cylinder The air inlet pipe of the piece, the first air delivery pipe is connected to the air intake hole of the first cylindrical part; the thread scrap conveying mechanism includes a thread end shearing extractor, a first line delivery pipe, as in claim item 1 to Another negative pressure joint and a second line pipe according to any one of 10, the two ends of the first line pipe are respectively connected to the thread end shearing extractor and the inlet of the other first cylinder. An air pipe, the second air delivery pipe is connected to the air inlet of the other first cylinder; and a collection bag, the two ends of the second delivery pipe are respectively connected to the air outlet pipe and the collection of the second cylinder; bag, and the two ends of the second line pipe are respectively connected to the air outlet pipe and the collection bag of the other second tube. The debris collection device of the sewing machine according to claim 11, wherein the air delivery mechanism further includes two adjustment valves, one of which is the adjustment valve connecting the first air delivery pipe and the air inlet of the first cylindrical member, The other adjustment valve is connected to the second air delivery pipe and the air inlet of the other first barrel.

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