JPH0772377B2 - Yarn splicing equipment for spinning machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is installed in a spinning machine and includes a yarn forming mechanism or a yarn forming mechanism.
The present invention relates to a yarn thread delivered from a take-up mechanism, a yarn thread pulled out from a package of a winding mechanism, and a device for splicing the yarn by a yarn splicing means.

(Prior Art) Generally, in a spinning machine such as an open-end spinning machine or a binding spinning machine, when a yarn breakage occurs during the production of spun yarn, the yarn splicing device moves to a corresponding position,
The upper thread suction means sucks the yarn sent from the take-up mechanism and conveys it to a knotting device or a splicer or other splicing means, and the lower thread suction means sucks and pulls out the yarn from the winding mechanism package. The yarns are conveyed to the yarn splicing means, and these yarns are spliced by the yarn splicing means. During the yarn splicing operation, spun yarn is formed by the yarn forming mechanism and sent out from the take-up mechanism.
A negative pressure type storage mechanism as described in Japanese Patent No. 2633 is installed to suction and store a predetermined amount of yarn.

(Problem) In the spinning machine as described above, when a waste thread, cotton dust, or the like is caught in the suction pipe of the negative pressure type storage mechanism, the waste thread or the like is removed only by the suction force of the negative pressure source connected to the storage mechanism. It is impossible to remove it from the inner wall of the suction tube and convey it to a dust box or the like, and the waste thread that has been caught first and the waste thread that has been sucked afterwards are piled up and completely clogged. Therefore, an operator must remove the suction tube and clean it. Further, since the suction port of the negative pressure type storage mechanism is installed in the vicinity of the take-up mechanism, the yarn sent from the take-up mechanism is not sucked by the upper thread suction pipe but is sucked by the negative pressure type storage mechanism. However, there were problems such as a poor success rate of yarn splicing.

(Purpose) A first object of the present invention is to enable removal of waste thread, cotton dust, etc., which are jammed in the negative pressure type storage mechanism.

A second object of the present invention is to make sure that the yarn sent from the yarn forming mechanism or the take-up mechanism is sucked by the upper yarn suction mechanism to improve the yarn splicing success rate.

(Means for Solving Problems) In order to achieve the above-mentioned object, a yarn splicing device of a spinning machine according to the present invention includes a yarn forming mechanism, a take-up mechanism, a negative pressure type storage mechanism, and a winding mechanism. A bogie is installed movably along the longitudinal direction of the machine base of the spinning machines sequentially arranged, and the bogie is drawn into the bogie by sucking the yarn splicing means and the yarn sent from the yarn forming mechanism or the take-up mechanism. The upper thread suction means for conveying to the splicing means and the lower thread suction means for sucking the yarn of the package of the winding mechanism and conveying it to the yarn splicing means are mounted, and the suction port of the negative pressure type storage mechanism is provided. It has a structure in which a compressed air injecting means for injecting compressed air is mounted. Further, the compressed air jetting means can be surely implemented by mounting it on the needle thread suction means.

(Example) The structure of one example of the textile machine of the present invention will be described with reference to the drawings.

Reference numeral 1 denotes a draft mechanism installed on the machine base 10, which is composed of a back roller 11, a middle roller 12 and a front roller 13, and stretches and aligns the staple fiber bundle at a predetermined magnification. Further, the back roller 11 is equipped with means for separating the drive shaft from the roller and stopping the rotation. 2 is a machine base so as to be adjacent to the front roller 13 of the draft mechanism 1.
The yarn forming mechanism is installed at 10, and sucks the staple fiber bundle supplied from the front roller 13 and applies a turning force to form a bundled spun yarn.
As the yarn forming device 2, for example, the device described in JP-A-61-836324 can be used. Denoted at 3 is a take-up mechanism installed below the yarn forming mechanism 2 with a predetermined interval, and is composed of a drive roller 31 and a short cantilever nip roller 32. The yarn sent out from the yarn forming mechanism 2 is predetermined. It is supposed to be picked up at the speed of. The tip of the nip roller 32 has a taper 32a of 90 ° or less. Reference numeral 4 denotes a negative pressure type storage mechanism which is installed adjacently below the take-up mechanism 3, one end of which is opened at a traveling position of the yarn and the other end of which is connected to the negative pressure duct 42 to form a substantially flat passage. The suction tube 41 is included. Reference numeral 5 is a tension applying mechanism attached to the lower portion of the suction pipe 41 of the negative pressure type storage mechanism 4, and is composed of a tenser 51, a cutter 52, a slab catcher, and the like. Reference numeral 6 denotes a fluid transfer mechanism formed so as to cover the yarn forming mechanism 2 and the take-up mechanism 3, the details of which are as shown in FIGS. 2 and 3. In the figure,
Reference numeral 61 is a fluid passage main body having a substantially U-shaped cross section, and the cover plate 2 is opened and closed and is detachably attached. And it is formed so as to cover the lower peripheral surface of the yarn forming mechanism 2. Further, the wall portion of the fluid passage body 61 is opened so that the drive roller 31 of the take-up mechanism 3 and the shaft of the nip roller 32 are located in the passage body 61 in a non-contact state. In addition, the nip roller 32 is entirely housed and the roller 32
A guide wall 61b is formed so that the passage 61a bypasses the tip of the guide wall 61b. In order to reduce the amount of bypass of the passage 61a as small as possible, it is necessary to shorten the length of the nip roller 32. The lower portion of the fluid passage body 61 has the negative pressure type storage mechanism 4 described above.
Is connected to the suction port 41a of the suction pipe 41.

The lid plate 62 is provided with a hole 62a which is also used as an insertion hole for the upper yarn suction means 82 of the yarn splicing device 8 and as a peep hole of the suction pipe 41 of the negative pressure type storage mechanism 4. A threading slit is formed up to the lower end of 62. Further, a hole 6b for allowing the air to flow in is formed in the side wall near the take-up mechanism 3.

A passage 61a formed by the passage body 61 and the cover plate 62 described above.
Must have a smooth surface that is streamlined and does not damage the yarn.

Further, the suction air flow of the negative pressure type storage mechanism 4 described above is set by the amount of inflow air in the fluid transfer mechanism 6.

Reference numeral 7 denotes a winding mechanism installed below the tension applying mechanism 5, which has a groove for traversing, a drive roller 71 attached via a clutch to a line shaft, and a bobbin rotatably attached, The cradle 72 is provided with a pressurizing means for bringing the bobbin into contact with the drive roller 71 with a predetermined surface pressure, and the yarn sent from the take-up mechanism 3 is wound up.

One unit is formed by the draft mechanism 1 to the winding mechanism 7, and a plurality of units are installed at a predetermined interval in the longitudinal direction of the machine base 10 to form one spinning machine.

The yarn splicing device 8 includes a carriage 81 that runs along the guides 10a and 10b formed on the machine base 10, a yarn splicing means 82 such as a knotter or a splicer attached to the carriage 81, and a rotation on the carriage 81. The upper thread suction means 83 freely attached, the lower thread suction means 84 rotatably attached to the carriage 81, and the compressed air jetting means 85 movably attached to the upper thread suction means 83. ing. The compressed air injection means 85
Is shown in detail in FIG. 4, in which 86 is a compressed air jet main body movably attached to the suction tube 83a of the needle thread suction means 83, and groove portions are formed at both ends for sealing. An O-ring 87 is attached. The compressed air injection body 86 has a compressed air chamber.
86a is formed and a hole 86b communicating with the outer peripheral surface is formed. As shown in FIG. 2, when the suction pipe 83a moves to the yarn suction position of the take-up mechanism 3, the hole 86b has an angle (θ ₁ ) with respect to the yarn traveling direction of 60 to 90 °, and the negative pressure type storage mechanism. The angle (θ ₂ ) of 4 with respect to the suction port is 15 in the direction of the notch 32a of the nip roller 32 of the take-up mechanism 3 as shown in FIG.
It must be drilled so that it is inclined by ~ 30 °. Reference numeral 88 is a joint screwed to the compressed air jet main body, to which a compressed air supply pipe 89 having a pressure control valve (not shown) and a gate valve (not shown) is connected.

Therefore, when the upper yarn suction means 83 moves to the yarn suction device below the take-up mechanism 3, compressed air is jetted from the hole 86b of the compressed air jet main body 86 and is conveyed through the passage 61a of the fluid passage main body 61. Suck the yarn.

When the above-mentioned compressed air injection means 85 is movably attached to the needle thread suction means 83, the injection direction, injection position, etc. of the compressed air can be freely changed, but it is necessary to change them. For example, it is fixed to the upper thread suction means 83.

The draft mechanism 1, the take-up mechanism 3, the winding mechanism 7, the yarn splicing device 8 and the like described above are control devices including an operation setting input circuit, a memory circuit, a comparison operation circuit, an operation command circuit, or the like, or
It is controlled by a microcomputer or the like.

When yarn breakage occurs during the yarn forming and winding operations in the spinning machine described above, the rotation of the back roller 11 of the draft mechanism 1 is stopped based on a signal from a control device (not shown), and the yarn forming is performed. While the delivery of the yarn from the mechanism 2 is stopped, the clutch (not shown) of the trib roller 71 of the winding mechanism 7 is actuated to disconnect from the line shaft, and the rotation of the package 100 is stopped. Next, the yarn splicing device 8 moves to the corresponding unit position to start the yarn splicing operation.
First, the needle thread suction means 83 operates to apply a negative pressure to the suction pipe 83, and the compressed air injection means 85 operates to supply compressed air from the compressed air supply pipe 88 into the compressed air injection body 86. It is ejected from the hole 86a. In this state, when the suction tube 83 rotates from the standby position toward the yarn suction position, the compressed air injected from the hole 86a causes the tenser 51 of the tension applying mechanism 5,
Alternatively, the cotton wool, the waste thread, or the like attached to the cutter 52 or the like is blown off. Then, the tip end of the suction pipe 83a is the hole 6 of the lid plate 62.
When it is inserted into 2a and is moved to a suction position upstream of the suction port 41a of the suction pipe 41 of the negative pressure type storage mechanism 4 as shown in FIG. Duct for blowing out cotton wool, waste thread, etc. in the suction pipe 41
Aspirate to 42. At this time, the suction port of the negative pressure type storage mechanism 4 is blocked from the passage 61a by the compressed air injected from the compressed air injection means 85, and the negative pressure type storage mechanism 4
The compressed air injected from the compressed air injecting means 85, the air sucked from the hole 62a of the cover plate 62, the passage 61a
Part of the air inside is sucked, and most of the air in the passage 61a is sucked into the suction pipe 83a of the needle thread suction means 83. Then, the draft mechanism 1 is activated to draw the staple fiber bundle to a preset magnification and supply it to the aligning thread-like forming mechanism 2,
The bundled spun yarn formed in the filament forming mechanism 2 is spun with an air flow. At this time, the suction force acts on the passage 61a of the fluid transport mechanism 6 by the needle thread suction means 83,
Air ejected from the yarn forming mechanism 2 and the yarn forming mechanism 2
The air sucked from the gap between the outer peripheral surface and the fluid transfer mechanism 6 becomes an air flow in the passage 61a and moves in the same direction as the running direction of the yarn, and is guided to the suction pipe 83a of the upper yarn suction means 83. Being sucked. Therefore, the yarn sent out from the yarn forming mechanism 2 moves in the passage 61 by the air flow and is a suction pipe of the upper yarn suction means 83.
It is conveyed toward the suction port of 83a and sucked. When the operation of sucking the yarn is completed, the injection of the compressed air from the hole 86a of the compressed air jet main body 86 is stopped, and the upper yarn suction means 83 rotates to convey the yarn to the yarn splicing means 82. Simultaneously with this operation, the bobbin thread suction means 84 operates to suck the thread from the package 100 mounted on the cradle 72 of the winding mechanism 7 and convey it to the yarn splicing means 82. When each yarn is conveyed to the yarn splicing portion, the yarn splicing means 82 operates to splice the yarn. When the above-mentioned upper thread suction means 83 and lower thread suction means 84 convey the respective yarns to the yarn splicing portion of the yarn splicing means 83, the suction force is erased and they respectively return to the standby positions.

In the above-mentioned operation, when the upper yarn suction means 83 sucks the yarn and conveys it to the yarn joining means, and the yarn is fixed to the yarn joining portion,
The yarn sent from the take-up mechanism 3 is sucked into the negative pressure type storage mechanism 4 and stored in a U-shape until winding is started.

When the yarn splicing operation is completed, the clutch of the winding mechanism 7 is actuated to connect the drive roller 71 to the line shaft to wind the yarn. Since the winding speed of the yarn by the winding mechanism 7 is 2 to 3% faster than the yarn delivery speed of the winding mechanism 3, the yarn stored in the negative pressure type storage mechanism 4 during the yarn splicing operation. The strips are wound on the package 100 to a preset amount.

(Effects of the Invention) A yarn splicing device for a spinning machine according to the present invention has a yarn forming mechanism, a take-up mechanism, a negative pressure type storage mechanism, and a winding mechanism arranged in the longitudinal direction of the machine frame of the spinning machine. A bogie is movably installed along the bogie, and a yarn splicing means, an upper yarn suction means for sucking the yarn sent from the yarn forming mechanism or the take-up mechanism and conveying the yarn to the yarn splicing means, The lower yarn suction means for sucking the yarn of the package of the mechanism and conveying it to the yarn splicing means is attached, and the compressed air injecting means for injecting the compressed air toward the suction port of the negative pressure type storage mechanism is attached. Because of the configuration, compressed yarn can reliably remove the waste thread, the fly thread clogging the negative pressure type storage mechanism, or the fly thread adhering to the tension applying mechanism each time the piecing operation is performed.

Further, the yarns sent from the yarn forming mechanism or the take-up mechanism can be surely sucked, and the success rate of yarn joining can be improved.

If the above-mentioned compressed air jetting means is attached to the needle thread suction means, it can be surely carried out.

[Brief description of drawings]

FIG. 1 is a schematic view showing one embodiment of the spinning machine of the present invention. FIG. 2 is an enlarged schematic view of a Z portion in FIG. FIG. 3 is a view on arrow YY in FIG. FIG. 4 is an enlarged schematic view of a portion X in FIG. FIG. 5 is a schematic diagram showing a flow state of air at the time of yarn suction by the upper yarn suction means. 1: Draft mechanism, 2: Yarn splicing mechanism, 3: Pulling mechanism, 4: Negative pressure type storage mechanism, 5: Tension applying mechanism, 6: Fluid transport mechanism, 7: Winding mechanism, 8: Yarn splicing device, 41 , 83a: suction pipe, 61: fluid passage body, 62: cover plate, 81: carriage, 82: yarn splicing means, 83: upper thread suction means, 84: lower thread suction means, 85: compressed air jetting means, 86: Compressed air injection body, 87: O-ring, 88: Fitting, 89: Compressed air supply pipe,

Claims (2)

[Claims] 1. A bogie is movably installed along a machine longitudinal direction of a spinning machine in which a yarn forming mechanism, a take-up mechanism, a negative pressure type storage mechanism, and a winding mechanism are sequentially arranged. The yarn splicing means, the upper yarn suction means for sucking the yarn sent from the yarn forming mechanism or the take-up mechanism and conveying it to the yarn joining means, and the yarn for sucking the yarn of the package of the winding mechanism into the carriage. A yarn splicing device for a spinning machine, characterized in that a bobbin thread suction means for conveying to the splicing means is mounted, and a compressed air jetting means for jetting compressed air toward the suction port of the negative pressure type storage mechanism is mounted. . 2. A yarn splicing device for a spinning machine according to claim 1, wherein the compressed air jetting means is attached to the upper yarn sucking means.