JP2502332Y2 - Pneumatic reed pulling device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic reed-pulling device for pulling a warp yarn together with an airflow into a gap between reed blades as a preparatory step for weaving work in an automatic loom, and more particularly,
The present invention relates to a device capable of surely detecting the presence or absence of pulling.

[0002]

[Prior Art and Problems to be Solved by the Invention]
By forming a narrow slit groove in the vertical direction on the front surface of the nozzle body from the upper side of the side surface or from the upper surface to the lower surface,
The upper side or the upper side of the side face is provided with a yarn outlet, the lower face is provided with a yarn outlet, and the front face is provided with a yarn escape port, and the pressurized air is substantially parallel to the inside of the nozzle body in the slit groove. A nozzle provided with a slit-shaped air ejection hole for blowing air as a flow to generate an air flow from the yarn supply port to the yarn ejection port by an ejector action is arranged on the upper surface of the reed so as to be movable in the parallel direction of the reed blades. In the state where the yarn outlet is aligned with the gap of the reed wing, the end portion of the warp supplied to the yarn supply port is blown out from the yarn outlet and passed through the gap, and the middle of the warp is released from the yarn escape port. An ejector guide is formed integrally with the nozzle so that the guide groove is formed on the lower surface of the reed to guide the end of the warp thread passing through the gap of the reed from the upper surface to the front surface with the air flow. Target They arranged to move, and the guide grooves and pneumatic reed drawing-and oppositely arranged light receiving element and the pair of the light emitting element across the device are known in Japanese Unexamined Utility Model Publication No. 63-199179.

In this device, it is determined whether or not the light emitted from the light emitting element and received by the light receiving element is interrupted by the warp thread depending on whether or not the warp thread has passed through the gap between the reeds and inside the guide groove. However, it is difficult to avoid the scattering of fine thread waste when the warp is blown out by the air flow, and it is difficult to avoid the fine thread waste from scattering when used for a long time, and the light emitting surface of the light emitting element and the light receiving surface of the light receiving element. If dust such as lint adheres to the surface, the light may be blocked and malfunction may occur.

[0004]

[Means for Solving the Problems] As a means for solving the above-mentioned problems, the present invention secures covers on both left and right outer surfaces of the ejector guide so as to face each other and is covered by the cover of the ejector guide. A pair of window holes obliquely downward from the outer surface to the guide groove are formed in the open portion, and the pair of light emitting elements and light receiving elements are housed in the cover and installed oppositely through the pair of window holes. An intake hole is formed in each of the pair of covers, and a filter is fitted in each intake hole.

[0005]

[Operation and effect of the present invention] Since the present invention has the above configuration,
The air in the cover is sucked into the guide groove by the air flow flowing from the upper surface to the front surface in the guide groove, and the outside air flows into the cover, which has a negative pressure, through the filter of the intake hole. Therefore, the inside of the cover is always kept clean, and there is no risk of dust such as thread dust adhering to the light emitting element and the light receiving element housed in the cover, and there is an effect that the malfunction is surely prevented.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

In the figure, reference numeral 1 is a nozzle for blowing the end portion of the warp c into the gap between the reed wing b of the reed a mounted in a horizontal position and pulling it through, with the upper surface of the reed a being the reed wing b. The nozzle 1 is moved along a parallel direction with a constant pitch corresponding to each gap of the reed wing b. Three
A narrow slit groove 5 in the vertical direction is formed on the front surface of the block-shaped nozzle main body 2 in which the depth from the front surface of the nozzle main body 2 is extended from the bottom of the thread introducing portion 3 to the lower surface of the nozzle main body 2. The upper end of the slit groove 5 which is constantly formed and opens in the thread introduction portion 3 is the thread supply port 6, the lower surface opening is the thread outlet 7, and the front opening is the thread escape port 8. The upper part of the slit groove 5 in the nozzle body 2,
A narrow ejection hole 1 having a depth ranging from the position where it enters into the slit groove 5 almost half way inside to the rear end.
0 is formed and communicated with the upper end of the slit groove 5, and the ejection hole 10 is formed with the communication hole 1 formed at the rear end of the upper end.
0a, the air supply hole 11 formed in the nozzle body 2
Further, an auxiliary ejection hole 13 for blowing air into the gap of the reed wing b to widen the gap is formed at a position rearward of the slit groove 5 in the nozzle body 2 to form the above air supply hole. A shield 40 that is connected to the ejector guide 15 to be described later is connected to the ejector guide 15 and is connected to the lower end of the reed a so as to face the auxiliary ejection holes 13 and close the lower surface of the gap of the reed b. By supplying the compressed air from the air supply hole 11 of the above, substantially straight laminar compressed air flows mainly on the rear end side of the ejection hole 10 and the slit groove 5, and the yarn escape due to the ejector action. While the amount of air flowing out from the mouth 8 is suppressed very slightly, a substantially straight laminar air flow is generated mainly from the yarn supply port 6 of the slit groove 5 toward the yarn discharge port 7 at the rear end side. Auxiliary squirt Airflow shield ejected from 13 4
By hitting 0, the gap between the reeds b is expanded.

On the lower surface of the reed a, an ejector guide 15 for guiding the end of the warp c that has passed through the gap between the reeds b to the front end side of the reed b is integrally formed with the nozzle 1 and connected to the guide bar 1.
6 is a device for moving along 6 and its guide body 1
A narrow guide groove 20 is formed on the upper surface 7 of the nozzle 7 so as to be continuously elongated from the upper surface to the front surface. An inlet 21 corresponding to the yarn outlet 7 of the nozzle 1 is formed in the upper opening. At the same time, the outlet 22 is formed in the opening on the front side. The guide groove 20 has a retaining pin 25 that horizontally protrudes from one side wall at its upper position.
However, it is always mounted so as to be held in abutment with the other side wall opposite thereto, and is drawn into the one side wall by driving the solenoid.

A pair of window holes 28, 28 are formed on both side walls of the guide body 17 so as to be inclined from the outer surface to the inner guide groove 20 and obliquely downward, and the outer surface thereof has a box-shaped cover. 31 and 31 are attached.

A light emitting element 29 is attached to one inner surface of each of the covers 31 and 31, and a light receiving element 30 is attached to the other inner surface thereof, which correspond to each other through window holes 28 and 28. Intake holes 32, 32 are formed on the upper surfaces of the covers 31, 31 and filters 33, 33 are fitted therein.

This embodiment has the above-mentioned structure, and the nozzle 1 and the ejector guide 15 are moved to align the yarn outlet 7, the auxiliary ejection hole 13 and the introduction port 21 with the gap of the reed b, and then the nozzle 1 When pressurized air is supplied to the air supply hole 11 of the nozzle 1, the air flow from the yarn supply port 6 of the nozzle 1 to the yarn outlet 7 passes through the gap of the reed wing b, and the guide groove is introduced from the introduction port 21 of the ejector guide 15. 20 and flows out from the outlet 22. In this state, the reel 4 in front of the nozzle 1
When the warp yarn c wound around the No. 1 is pulled out so that the feeding end extends beyond the nozzle 1 and extends rearward and is attached to the yarn supply port 6 from the yarn introducing portion 3 of the nozzle 1, the warp yarn c is fed out. The end is sucked into the slit groove 5 and blown out from the yarn outlet 7, and the middle portion thereof is discharged from the yarn outlet 8 to the nozzle 1
While passing through the gap of the reed wing b while being released to the outside, guided from the introduction port 21 of the ejector guide 15 into the guide groove 20 and caught by the hooking pin 25, thereby guiding even if the feeding end is entangled. The airflow flowing in the groove 20 causes the airflow to be extended into a single line, and when the feeding end is blown toward the outlet 22 side and crosses between the window holes 28, 28, the light receiving element 30 causes the warp c By outputting a signal that detects that the hair has passed through the gap between the reeds b, the latch pin 25 is retracted by driving the solenoid, and the warp c is blown from the outlet 22 to the front of the ejector guide 15. .

Here, the air in the covers 31, 31 is sucked from the window holes 28, 28 by the air flow flowing from the inlet 21 to the outlet 22 in the guide groove 20, and the inside of the covers 31, 31 becomes negative pressure. Filters 33, 33 of the intake holes 32, 32
The outside air flows in from.

As described above, since the clean air filtered by the filters 33, 33 is constantly flowing through the covers 31, 31, the light emitting element 29 and the light receiving element 30 may be attached with dust such as lint. It is kept clean and prevents malfunctions.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of one embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

[Explanation of symbols]

15: Ejector guide 20: Guide groove 21: Inlet port
22: Outlet port 28: Window hole 29: Light emitting element 30: Light receiving element 31: Cover 32: Intake hole 33: Filter

Claims (1)

(57) [Scope of utility model registration request] 1. A narrow slit groove in the vertical direction is formed on the front surface of the nozzle body from the upper or upper surface of the side surface to the lower surface, whereby a thread supply port is formed on the upper or upper surface of the side surface, and a thread discharge port is formed on the lower surface. A yarn escape port is formed on each of the front faces, and pressurized air is blown downward into the slit groove in the nozzle body as a substantially parallel flow to eject the yarn from the yarn supply port to the yarn ejection port. A nozzle formed with a slit-shaped air ejection hole for generating an air flow is arranged movably in the parallel direction of the reed wing on the upper surface of the reed, and the yarn outlet is aligned with the gap of the reed wing, The end portion of the warp yarn supplied to the yarn supply port is blown out from the yarn discharge port and passed through the gap so that the middle of the warp yarn is escaped from the yarn escape port to the outside of the nozzle. Between An ejector guide having an guide groove for guiding the end of the warp thread passing through the gap from the upper surface to the front surface together with the airflow is arranged so as to move integrally with the nozzle, and a pair of ejector guides are provided with the guide groove interposed therebetween. In a pneumatic reed pulling device in which a light emitting element and a light receiving element are installed in a pair, covers are fixed to both left and right outer surfaces of the ejector guide so as to face each other, and a portion covered by the cover of the ejector guide is fixed to the outer surface from the outer surface. A pair of window holes is formed obliquely downward toward the guide groove, and the pair of light emitting element and light receiving element are housed in the cover and installed oppositely through the pair of window holes. An air-pressure type reed pulling device, wherein each air intake hole is formed and a filter is fitted into each air intake hole.