JPS60181348A - Rotary drum type weft yarn storage apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention The present invention relates to a weft storage device for storing a predetermined length of weft prior to weft insertion in a shuttleless machine, and relates to a weft end holding device in a rotating drum type weft storage device. It is.

・Technical background In air jet looms and water jet looms, it is necessary to store a predetermined length of weft yarn prior to weft insertion, and for this purpose, a weft storage device is provided on the yarn supply source side of the weft insertion nozzle. . Weft storage devices include air suction or injection types, fixed drum types, and rotating drum types. Zero-rotation drum type weft storage devices smoothly decelerate and stop the weft at the end of weft insertion. There is a patent that there is little weft breakage even during high-speed weaving, and the operability is good. Is required.

・Prior art and problems As yarn end holding devices, there are known devices in which a brush or H1 tooth-shaped ring is provided at the weft release side end of the yarn storage drum, and devices in which the weft is held by swirling air flow. ing. However, with the former structure, the weft is released while sliding against the brush or comb teeth, so the release resistance is large and the release resistance is uneven, making it impossible to apply uniform tension to the weft. . In addition, the latter structure consumes a large amount of air, resulting in large power consumption, and has the disadvantages of large length measurement irregularities. However, there were problems in that the weft yarn could not be held reliably, and there were restrictions on the types of weft yarns that could be used.

・Purpose of the Invention This invention was made to solve the problems of the conventional device described above, and it is possible to securely hold the yarn end when winding the weft yarn around the yarn storage drum, thereby eliminating uneven length measurement. The object of this invention is to provide a yarn end holding device which can prevent the weft from occurring, has low resistance to releasing the weft, and can smoothly release the weft.

・Drawing of the Invention Explaining with the reference numerals of the illustrated embodiments, the rotating drum type weft storage device of the present invention is a weft storage device for a shuttleless loom that winds and stores weft from a yarn supply source on a rotating yarn storage drum 9. In the apparatus, holding drums 10, 10 are placed on the weft release side of the yarn storage drum 9.
a, and a strip-shaped weft yarn clamping body 22.76 that surrounds the outer periphery of the holding drum. By expanding the outer periphery 21 of the holding drum or by squeezing the weft nip 76, the holding drums 10, 10a and the weft nip 22.7 are connected to the weft insertion nozzle.
6 are brought into close contact with each other to hold the ends of the weft yarns wound around the yarn storage drum.

・Example diagrams of the invention show examples of the invention, and are shown in Figures 1 to 3.
The figure shows an embodiment in which the weft is held by expanding the outer shape of the holding drum at appropriate times, and Figures 4 to 6 show embodiments in which the weft is held by squeezing the weft holding drum. It is something that

In Figure 1, 1 is a drum support frame, 2 is a bearing 3
, 4 is a drum shaft fixed to the drum support frame 1, 5 is a rotating drum fixed to one end of the drum shaft 2, and 6 is a drum shaft 2.
The rotary drum 5 is a pulley fixed to the other end, and the rotary drum 5 is rotated at a constant speed by a drive device (not shown) via a timing belt 7 wound around the pulley 6. A drum 8, a yarn storage drum 9, and a holding drum 10 are integrally formed. Reference numeral 11 designates a gripping roller which is pivoted on a bracket 12 fixed to the drum support frame 1 and rotates in contact with the outer periphery of the length measuring drum 8. Reference numeral 13 represents a yarn guide implanted in the drum support frame 1. What about the weft yarn from the yarn supply source that does not warp? The yarn is held between the 11j-long drum 8 and the gripping roller 11 and fed out onto the measuring drum 8 by rotation thereof, guided to the yarn storage drum 9 by the yarn guide 13, and wound and stored on the yarn storage drum 9. It looks like this. In addition, 14.15 in FIG. 1 is a bearing holder, 16.17 is a dust seal, and 18.19 is a locking nut.

The holding drum 10 is provided on the weft release side of the yarn storage drum 9, and consists of a base body 20 and a belt 21 wound around the base body 20, and the outer surface of the belt 21 is the outer peripheral surface of the holding drum 10. . One end 21a of the belt 21 is fixed to the holding drum base 20, and the other end 21b is fixed to the tip of a belt expanding lever 42, which will be described later. Holding drum 1
A band-shaped weft pinching ring 22 is loosely fitted to the belt 21 so as to surround the outer periphery of the belt 21, that is, the outer surface of the belt 21. It passes through the gap and is guided to a weft insertion nozzle (not shown). 23 and 24 are weft thread holding rings 22;
This is a tsuba provided to prevent the item from falling off.

A through hole 25 is meticulously provided in the drum shaft 2, and a sliding rod 26 is inserted into this through hole so that it can freely slide in the axial direction but cannot rotate relatively. A tapered surface 27 is formed at the base end of which a groove wheel 28 is fixed. A roller 30 having a spherical excitation surface provided at the tip of a lever 29 is fitted into the groove of the groove wheel 28 with a slight play.
The camshaft 33 rotates sub-rotated in the same manner as the crankshaft of the loom via a lever 32. 34 is a pin that pivotally connects the lever 29 to the stationary part side;
5 and 36 are connecting rod 31 and levers 29 and 32
37 is a pin that pivotally connects the lever 32 to a stationary member; 38 is a face cam attached to the camshaft 33; 39 is a pin that is pivotally connected to the lever 32 and the face cam 3
The cam roller 8 is in contact with the cam roller 8, and the cam roller 40 is a tension spring stretched between the lever 32 and the stationary member.

As shown in FIG. 2, a belt expansion lever 42 is pivotally attached to the flange portion 41 of the rotating drum 5 by a pin 43, and a roller 4 pivoted to the base end of the belt expansion lever 42 is attached to the flange portion 41 of the rotating drum 5.
4 engages with the tapered surface 27 of the sliding rod 26. 45 is a tension spring stretched between the lever 42 and the flange portion 41 of the rotating drum. The ends of the belt 21 forming the outer periphery of the holding drum 10 overlap as shown in FIG. Base 2 in the state
0, and the other end 21b is fixed to the tip of a belt expanding lever 42 that passes through a circumferentially long through hole 47 provided in the base body 20 and faces the through hole 47. 4
8 and 49 are screws fixing the belt 21.

1 and 2 show the state when the weft is released. The sliding rod 26 is pushed rightward in FIG. 1, and the tapered surface 27 moves the belt expansion lever 42 to the second The belt 21 is pulled by swinging in a white direction in the figure, and the belt 21 is in close contact with the base body 20 of the holding drum. In this state, a gap 50 is formed between the belt 21 and the weft holding ring 22, and the weft on the yarn storage drum 9 is released through the gap 50. When the camshaft 33 rotates and the lever 29 pushes the sliding rod 26 to the left in FIG.
The belt expanding lever 42 is rotated upward in FIG. 2 by the biasing force of the spring 45, and the belt 21 is pushed back and expanded. The weft that passes between the two is held between the two. In this state, the weft is wound around the yarn storage drum 9 and stored.

Next, a second embodiment shown in FIGS. 4 to 6 will be described. The holding drum 10a formed on the rotating drum 5a of the second embodiment is located on the same axis as the drum shaft 2a on the weft release side of the 0-rotating drum 5a, which is a simple cylindrical drum having a flange 23, 24. The hollow shaft 51 is attached to the drum support frame 1a.
It is pivotally supported via bearings 53 and 54 on a support frame 52 that is integrated with. At the end of the hollow shaft 51 on the rotating drum side,
Two radially extending support arms 55.5 opened 180 degrees
5 is fixedly installed, and a bracket 56 is formed at the tip of each support arm 55. An arm 57 that swings in the radial direction is pivotally attached to the bracket 56 by a pin 58. A receiving part 59 is formed at the tip of the arm 57 and extends to the outside of the holding drum 10a. is roller 60
is attached to the shaft. A tension spring 61 is stretched between the arm 57 and the support arm 55 that pivotally supports it, and urges the receiving portion 59 at the tip of the arm outward.

On the other hand, a sliding body 63 having a flange portion 62 that engages with a roller 60 at the base end of the arm is attached to the hollow shaft 51 so as to be slidable in the axial direction but not relatively rotatable.
Lever 6 is pivotally connected to a base 65 in a circumferential groove 64 provided in 3.
A shaft-mounted shear roller 67 is engaged with the tip of the roller 6 . A cam roller 39 is pivotally attached to the base end of the lever 66, and this cam roller 39 rotates in synchronization with the crankshaft of the loom.
It is in contact with a face cam 38 provided at 3. 68 is a pin that pivotally supports the lever 66, and 40 is a tension spring that urges the lever 66 counterclockwise in the figure. With the above configuration, the sliding body 63 reciprocates in the axial direction due to the rotation of the camshaft 33, and the arm 57 swings around the bin 58.

Reference numeral 69 denotes a connecting shaft supported in parallel with the drum shaft 2a and the hollow shaft 51. Rotational driving force from a drum drive device (not shown) is transmitted to the connecting shaft 69 by the timing belt 7, are connected to the connecting shaft 69 via timing belts 70 and 71 and rotate in the same direction and at the same speed. 72, 73 and 74 are pulleys fixed to the connecting shaft 69, 6 is a pulley fixed to the drum shaft 2a, and 75 is a pulley fixed to the hollow shaft 51.

A wire-shaped weft nipping belt 7676 is wound between the receiving portion 59.59 at the tip of the arm and the holding drum 10a, and the weft of the yarn storage drum 9 is held between the holding drum 10a and the weft nipping belt 76.76. It passes through the hollow hole 77 of the hollow shaft 51 and is guided to a weft inserting nozzle (not shown). In the state shown in FIG. 5 in which the sliding body 63 has moved upward and to the right in FIG. It comes to a position close to .

In this state, the weft nipping belt 76.76 wound between the receiving portion 59.59 and the holding drum 10a is loosened, and a gap 50 is formed between the holding drum 10a and the weft nipping belt 76.76. The weft yarn wound around the yarn storage drum 9 is released through the play gap 50. The play gap 60 is the fifth
Although they are not formed at regular intervals all around the holding drum 10a as shown in the figure, the weft nipping belts 76.
76 is loosened, a clearance 50 is formed at least in the weft passing portion, and the weft is rotated from the yarn storage drum 9.
It will be lifted while doing so. When the sliding body 63 moves to the left due to the rotation of the camshaft 33, the receiving portion 59.59 of the arm moves in the direction away from the holding drum 10a due to the biasing force of the spring 61.61, thereby causing the weft holding belt 76.76 to move away from the holding drum 10a.
is pulled and comes into close contact with the holding drum 1'Oa as shown in FIG. In this state, the weft passing between the holding drum 10a and the weft nipping belts 76, 76 is held, and the weft yarn pulled out by the length measuring roller 8 is stored by rotating together with the holding drum 10a and the weft nipping belts 76, 76. It is wound onto drum 9.

- The rotating drum type weft storage device of the present invention described in detail includes the holding drum 1 (j, 10a) and the weft nipping bodies 22, 76 surrounding the holding drum 1 (j, 10a) on the weft release side of the yarn storage drum 9. The outer periphery 21 of the drums 10, 108 is expanded or the weft nipper 76
Since the weft is held and released by squeezing the weft, the weft can be held and released reliably at accurate timing, and the weft release resistance can be extremely small. In addition, since the weft is clamped and held securely, it is not difficult to hold the weft even when strongly twisted yarn is used, and furthermore, the weft clamping body 22.76 acts to suppress ballooning when the weft is released. , there is no need to provide a cover to prevent ballooning.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the present invention, in which FIG. 1 is a longitudinal cross-sectional view, FIG. 2 is a cross-sectional view showing a holding drum and a weft nipper, and FIG. FIG. 3 is a perspective view showing an end of a belt forming the outer periphery of the holding drum. Figures 4 to 6 show a second embodiment of the present invention, with Figure 4 being a longitudinal sectional view, and Figures 5 and 6 showing the holding drum and weft nipping body during weft release and gripping. It is a cross-sectional m diagram showing the relationship between. In the figure, 2.2a is a drum shaft, 5 and 5a are rotating drums, and 8
9 is a length measuring drum, 9 is a yarn storage drum, 10° 108 is a holding drum, 20 is a base of the holding drum, 21 is a belt forming the outer periphery of the holding drum, 21a121b is an end of the belt,
22 is a weft holding ring, 26 is a sliding rod, 27 is a tapered surface, 28 is a groove wheel, 33 is a cam shaft, 38 is a face cam, 4
2 is a belt expansion lever, 44 is a roller, 46.47 is a through hole, 50 is a clearance, 51 is a hollow shaft, 55 is a support arm, 57 is an arm, 59 is a receiving part, 60 is a roller, 63 is a sliding body ,6
4 is a circumferential groove, 66 is a lever, 67 is a roller, and 76 is a weft nipping belt. Agent: Patent Attorney Takao Nishi No. 5v4 No. 6 [≧4] Manabu Shiga, Director General of the Patent Office, Datne City 1, Indication of the case: Japanese Patent Application No. 59-037173 2, Title of the invention: Rotating drum type weft storage device 3. Relationship with the case of the person making the amendment Patent applicant Address: 97 Kitayasue-cho, Kanazawa City, Ishikawa Prefecture Name: Tagawa Kikai Co., Ltd. 4, Agent ■920 Telephone: 0762-23-0417
Address: 3-1-57-6, Nagamachi, Kanazawa, Ishikawa Prefecture Number of inventions increased by the amendment: 7, Claims column of the specification to be amended, Detailed explanation of the invention 8, Contents of the amendment (1) First, amend the claims section of the specification as stated in the attached sheet. (2) The phrase "The embodiments shown in the drawings..." on page 3, line 17 to page 4, line 1θ of the specification will be corrected as follows. [Explaining with the reference numerals of the illustrated embodiments, the rotating drum type weft storage device of the present invention is used in a weft storage device of a shuttleless loom that winds and stores weft yarn from a yarn supply source on a rotating yarn storage drum 9. , a holding drum IO is provided on the weft releasing side of the yarn storage drum 9, and a diameter increasing member 21 whose outer diameter can be freely expanded and contracted is provided on the holding drum. A clamping body 22 is provided, and the weft wound around the yarn storage tram is guided to the weft insertion nozzle through the space between the diameter increasing member and the weft clamping body. The end portion of the weft wound around the yarn storage drum 9 is held by expanding the diameter increasing member and bringing the weft yarn holding body 22 into close contact with each other. (3) Statement box 4-way No. 12
Figure 1 on line -17 shows...the present invention. ” is corrected as follows. - "Hereinafter, an example in which the diameter increasing belt 21 is used as the diameter increasing member and the °ζ weft clamping ring 22 is used as the weft clamping body will be described first.
The cutting is explained in detail in Figures 3 to 3. (4) [Holding drum IO...] from page 5, line 18 to page 6, line 11 of the specification
・It is a tsuba. ” as follows. [The holding drum 10 is provided on the weft release side of the yarn storage drum 9, and a diameter-increasing belt 21 is wound around its outer periphery. One end 21a of the increased diameter heald 21 has a holding drum of 1%.
The other end 21b is fixed to the tip of a belt expanding lever 42, which will be described later. A band-shaped weft clamping ring 22 is loosely fitted into the holding drano 10 so as to surround the diameter-increasing heald 21 wound thereon, and the yarn storage drum 9
The weft band wound around the weft band passes between the diameter-increasing belt 21 and the weft holding ring 22 and is guided to a weft insertion nozzle (not shown). Reference numerals 23 and 24 are flanges provided to prevent the weft holding ring 22 from falling off. ” First, correct it as “consolidated rondo.” (6) "The holding drum lO is fixed." in Mei III, page 7, line 16 to page 8, line 3, is corrected as follows. ``The diameter-increasing belt 21 wound around the holding drum 10 has its ends overlapped as shown in Fig. It is fixed in a hung state, and the other end 21b is fixed to the tip of a belt expanding lever 42 that passes through a circumferentially long through hole 47 provided in the holding drum IO and faces the through hole 47. (7) “Holding drum base 20” on page 8, line 9 of the specification
[Correct with holding drum IOJ. (8) In page 8 of the specification, lines 4, 8, 9, 11, 16, 17, and 18, the belt 21j is
1” and correct it. (9) Specification page 9, line 1 - page 12, line 13 [Next, Fig. 4......rolling. ” first. (10) In the specification, page 8, Figure 41, page 13, line 1, "from the yarn storage drum 9..." will be corrected as follows. A holding drum 1O is provided on the weft releasing side of the yarn storage drum 9, and a diameter increasing member 21 whose outer circumference can be expanded and contracted and a weft nipping body 22 surrounding this are provided to increase the diameter. Since the member 21 is expanded and contracted to hold and release the weft threads, (11) r and 76J in the 6th line of the 13th line of the specification are deleted. , (12) First, the column of the brief description of the drawings in the specification is amended as follows. [The figures show one embodiment of the present invention; FIG. 1 is a vertical view, FIG. The figure is a perspective view 1g1 showing the end of the diameter increasing member that has been wound around the holding drum. In the figure, 2 is a drum shaft, 5 is a rotating drum, 8 is a length measuring drum, 9 is a yarn storage drum, 1O is a holding drum, 21 is an increased diameter belt (increased diameter part +4') attached to the holding drum, 21a,
21b is the end of the belt, 22 is a weft clamping ring (weft clamping body), 26 is a sliding rod, 27 is a tapered surface, 28 is a groove wheel, 33 is a camshaft, 38 is a face cam, and 42 is a belt expansion 44 is a lever, 46 and 47 are through holes, and 50 is a clearance. (13) Delete figures 4 to 6 on page 11. 2. Claims (1) A weft storage device for a shuttleless loom that winds and stores a weft from a yarn supply source on a rotating yarn storage drum, in which a holding drum is provided on the weft release side of the yarn storage drum. The weft yarn wound around the yarn storage drum is guided to the weft inserting nozzle through the gap between the diameter increasing member and the weft yarn clamping body, and the weft thread is guided to the weft insertion nozzle by expanding the diameter increasing member. A rotary drum cord yarn storage device, characterized in that the end portion of the weft wound around the yarn storage drum is held by bringing the diameter increasing member and the weft yarn holding member into close contact with each other.

Claims (1)

[Claims] (1) In a weft storage device for a shuttleless loom that winds and stores weft from a yarn supply source on a rotating yarn storage drum, a holding drum is provided on the weft release side of the yarn storage drum and surrounds the outer periphery of the holding drum. A narrow weft nipping body is provided, and the weft wound around the yarn storage drum passes between the holding drum and the weft nipping body and is guided to the weft insertion nozzle, expanding the outer periphery of the holding drum. The holding drum and the weft clamping body are brought into close contact with each other by opening or squeezing the weft clamping body to hold the end of the weft wound around the yarn storage drum.
Rotating drum type weft storage device.